AudioPolicyManager.cpp revision 223fd5c9738e9665e495904d37d4632414b68c1e 
1/*
2 * Copyright (C) 2009 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#define LOG_TAG "AudioPolicyManager"
18//#define LOG_NDEBUG 0
19
20//#define VERY_VERBOSE_LOGGING
21#ifdef VERY_VERBOSE_LOGGING
22#define ALOGVV ALOGV
23#else
24#define ALOGVV(a...) do { } while(0)
25#endif
26
27// A device mask for all audio input devices that are considered "virtual" when evaluating
28// active inputs in getActiveInput()
29#define APM_AUDIO_IN_DEVICE_VIRTUAL_ALL  (AUDIO_DEVICE_IN_REMOTE_SUBMIX|AUDIO_DEVICE_IN_FM_TUNER)
30// A device mask for all audio output devices that are considered "remote" when evaluating
31// active output devices in isStreamActiveRemotely()
32#define APM_AUDIO_OUT_DEVICE_REMOTE_ALL  AUDIO_DEVICE_OUT_REMOTE_SUBMIX
33// A device mask for all audio input and output devices where matching inputs/outputs on device
34// type alone is not enough: the address must match too
35#define APM_AUDIO_DEVICE_MATCH_ADDRESS_ALL (AUDIO_DEVICE_IN_REMOTE_SUBMIX | \
36                                            AUDIO_DEVICE_OUT_REMOTE_SUBMIX)
37
38#include <inttypes.h>
39#include <math.h>
40
41#include <cutils/properties.h>
42#include <utils/Log.h>
43#include <hardware/audio.h>
44#include <hardware/audio_effect.h>
45#include <media/AudioParameter.h>
46#include <soundtrigger/SoundTrigger.h>
47#include "AudioPolicyManager.h"
48#include "audio_policy_conf.h"
49
50namespace android {
51
52// ----------------------------------------------------------------------------
53// Definitions for audio_policy.conf file parsing
54// ----------------------------------------------------------------------------
55
56struct StringToEnum {
57    const char *name;
58    uint32_t value;
59};
60
61#define STRING_TO_ENUM(string) { #string, string }
62#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
63
64const StringToEnum sDeviceNameToEnumTable[] = {
65    STRING_TO_ENUM(AUDIO_DEVICE_OUT_EARPIECE),
66    STRING_TO_ENUM(AUDIO_DEVICE_OUT_SPEAKER),
67    STRING_TO_ENUM(AUDIO_DEVICE_OUT_SPEAKER_SAFE),
68    STRING_TO_ENUM(AUDIO_DEVICE_OUT_WIRED_HEADSET),
69    STRING_TO_ENUM(AUDIO_DEVICE_OUT_WIRED_HEADPHONE),
70    STRING_TO_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_SCO),
71    STRING_TO_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET),
72    STRING_TO_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT),
73    STRING_TO_ENUM(AUDIO_DEVICE_OUT_ALL_SCO),
74    STRING_TO_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_A2DP),
75    STRING_TO_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES),
76    STRING_TO_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER),
77    STRING_TO_ENUM(AUDIO_DEVICE_OUT_ALL_A2DP),
78    STRING_TO_ENUM(AUDIO_DEVICE_OUT_AUX_DIGITAL),
79    STRING_TO_ENUM(AUDIO_DEVICE_OUT_HDMI),
80    STRING_TO_ENUM(AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET),
81    STRING_TO_ENUM(AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET),
82    STRING_TO_ENUM(AUDIO_DEVICE_OUT_USB_ACCESSORY),
83    STRING_TO_ENUM(AUDIO_DEVICE_OUT_USB_DEVICE),
84    STRING_TO_ENUM(AUDIO_DEVICE_OUT_ALL_USB),
85    STRING_TO_ENUM(AUDIO_DEVICE_OUT_REMOTE_SUBMIX),
86    STRING_TO_ENUM(AUDIO_DEVICE_OUT_TELEPHONY_TX),
87    STRING_TO_ENUM(AUDIO_DEVICE_OUT_LINE),
88    STRING_TO_ENUM(AUDIO_DEVICE_OUT_HDMI_ARC),
89    STRING_TO_ENUM(AUDIO_DEVICE_OUT_SPDIF),
90    STRING_TO_ENUM(AUDIO_DEVICE_OUT_FM),
91    STRING_TO_ENUM(AUDIO_DEVICE_OUT_AUX_LINE),
92    STRING_TO_ENUM(AUDIO_DEVICE_IN_AMBIENT),
93    STRING_TO_ENUM(AUDIO_DEVICE_IN_BUILTIN_MIC),
94    STRING_TO_ENUM(AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET),
95    STRING_TO_ENUM(AUDIO_DEVICE_IN_ALL_SCO),
96    STRING_TO_ENUM(AUDIO_DEVICE_IN_WIRED_HEADSET),
97    STRING_TO_ENUM(AUDIO_DEVICE_IN_AUX_DIGITAL),
98    STRING_TO_ENUM(AUDIO_DEVICE_IN_HDMI),
99    STRING_TO_ENUM(AUDIO_DEVICE_IN_TELEPHONY_RX),
100    STRING_TO_ENUM(AUDIO_DEVICE_IN_VOICE_CALL),
101    STRING_TO_ENUM(AUDIO_DEVICE_IN_BACK_MIC),
102    STRING_TO_ENUM(AUDIO_DEVICE_IN_REMOTE_SUBMIX),
103    STRING_TO_ENUM(AUDIO_DEVICE_IN_ANLG_DOCK_HEADSET),
104    STRING_TO_ENUM(AUDIO_DEVICE_IN_DGTL_DOCK_HEADSET),
105    STRING_TO_ENUM(AUDIO_DEVICE_IN_USB_ACCESSORY),
106    STRING_TO_ENUM(AUDIO_DEVICE_IN_USB_DEVICE),
107    STRING_TO_ENUM(AUDIO_DEVICE_IN_FM_TUNER),
108    STRING_TO_ENUM(AUDIO_DEVICE_IN_TV_TUNER),
109    STRING_TO_ENUM(AUDIO_DEVICE_IN_LINE),
110    STRING_TO_ENUM(AUDIO_DEVICE_IN_SPDIF),
111    STRING_TO_ENUM(AUDIO_DEVICE_IN_BLUETOOTH_A2DP),
112    STRING_TO_ENUM(AUDIO_DEVICE_IN_LOOPBACK),
113};
114
115const StringToEnum sOutputFlagNameToEnumTable[] = {
116    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_DIRECT),
117    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_PRIMARY),
118    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_FAST),
119    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_DEEP_BUFFER),
120    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD),
121    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_NON_BLOCKING),
122    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_HW_AV_SYNC),
123};
124
125const StringToEnum sInputFlagNameToEnumTable[] = {
126    STRING_TO_ENUM(AUDIO_INPUT_FLAG_FAST),
127    STRING_TO_ENUM(AUDIO_INPUT_FLAG_HW_HOTWORD),
128};
129
130const StringToEnum sFormatNameToEnumTable[] = {
131    STRING_TO_ENUM(AUDIO_FORMAT_PCM_16_BIT),
132    STRING_TO_ENUM(AUDIO_FORMAT_PCM_8_BIT),
133    STRING_TO_ENUM(AUDIO_FORMAT_PCM_32_BIT),
134    STRING_TO_ENUM(AUDIO_FORMAT_PCM_8_24_BIT),
135    STRING_TO_ENUM(AUDIO_FORMAT_PCM_FLOAT),
136    STRING_TO_ENUM(AUDIO_FORMAT_PCM_24_BIT_PACKED),
137    STRING_TO_ENUM(AUDIO_FORMAT_MP3),
138    STRING_TO_ENUM(AUDIO_FORMAT_AAC),
139    STRING_TO_ENUM(AUDIO_FORMAT_AAC_MAIN),
140    STRING_TO_ENUM(AUDIO_FORMAT_AAC_LC),
141    STRING_TO_ENUM(AUDIO_FORMAT_AAC_SSR),
142    STRING_TO_ENUM(AUDIO_FORMAT_AAC_LTP),
143    STRING_TO_ENUM(AUDIO_FORMAT_AAC_HE_V1),
144    STRING_TO_ENUM(AUDIO_FORMAT_AAC_SCALABLE),
145    STRING_TO_ENUM(AUDIO_FORMAT_AAC_ERLC),
146    STRING_TO_ENUM(AUDIO_FORMAT_AAC_LD),
147    STRING_TO_ENUM(AUDIO_FORMAT_AAC_HE_V2),
148    STRING_TO_ENUM(AUDIO_FORMAT_AAC_ELD),
149    STRING_TO_ENUM(AUDIO_FORMAT_VORBIS),
150    STRING_TO_ENUM(AUDIO_FORMAT_HE_AAC_V1),
151    STRING_TO_ENUM(AUDIO_FORMAT_HE_AAC_V2),
152    STRING_TO_ENUM(AUDIO_FORMAT_OPUS),
153    STRING_TO_ENUM(AUDIO_FORMAT_AC3),
154    STRING_TO_ENUM(AUDIO_FORMAT_E_AC3),
155};
156
157const StringToEnum sOutChannelsNameToEnumTable[] = {
158    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_MONO),
159    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_STEREO),
160    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_QUAD),
161    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_5POINT1),
162    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_7POINT1),
163};
164
165const StringToEnum sInChannelsNameToEnumTable[] = {
166    STRING_TO_ENUM(AUDIO_CHANNEL_IN_MONO),
167    STRING_TO_ENUM(AUDIO_CHANNEL_IN_STEREO),
168    STRING_TO_ENUM(AUDIO_CHANNEL_IN_FRONT_BACK),
169};
170
171const StringToEnum sGainModeNameToEnumTable[] = {
172    STRING_TO_ENUM(AUDIO_GAIN_MODE_JOINT),
173    STRING_TO_ENUM(AUDIO_GAIN_MODE_CHANNELS),
174    STRING_TO_ENUM(AUDIO_GAIN_MODE_RAMP),
175};
176
177
178uint32_t AudioPolicyManager::stringToEnum(const struct StringToEnum *table,
179                                              size_t size,
180                                              const char *name)
181{
182    for (size_t i = 0; i < size; i++) {
183        if (strcmp(table[i].name, name) == 0) {
184            ALOGV("stringToEnum() found %s", table[i].name);
185            return table[i].value;
186        }
187    }
188    return 0;
189}
190
191const char *AudioPolicyManager::enumToString(const struct StringToEnum *table,
192                                              size_t size,
193                                              uint32_t value)
194{
195    for (size_t i = 0; i < size; i++) {
196        if (table[i].value == value) {
197            return table[i].name;
198        }
199    }
200    return "";
201}
202
203bool AudioPolicyManager::stringToBool(const char *value)
204{
205    return ((strcasecmp("true", value) == 0) || (strcmp("1", value) == 0));
206}
207
208
209// ----------------------------------------------------------------------------
210// AudioPolicyInterface implementation
211// ----------------------------------------------------------------------------
212
213
214status_t AudioPolicyManager::setDeviceConnectionState(audio_devices_t device,
215                                                          audio_policy_dev_state_t state,
216                                                  const char *device_address)
217{
218    String8 address = (device_address == NULL) ? String8("") : String8(device_address);
219    // handle legacy remote submix case where the address was not always specified
220    if (deviceDistinguishesOnAddress(device) && (address.length() == 0)) {
221        address = String8("0");
222    }
223
224    ALOGV("setDeviceConnectionState() device: %x, state %d, address %s",
225            device, state, address.string());
226
227    // connect/disconnect only 1 device at a time
228    if (!audio_is_output_device(device) && !audio_is_input_device(device)) return BAD_VALUE;
229
230    // handle output devices
231    if (audio_is_output_device(device)) {
232        SortedVector <audio_io_handle_t> outputs;
233
234        sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
235        devDesc->mAddress = address;
236        ssize_t index = mAvailableOutputDevices.indexOf(devDesc);
237
238        // save a copy of the opened output descriptors before any output is opened or closed
239        // by checkOutputsForDevice(). This will be needed by checkOutputForAllStrategies()
240        mPreviousOutputs = mOutputs;
241        switch (state)
242        {
243        // handle output device connection
244        case AUDIO_POLICY_DEVICE_STATE_AVAILABLE:
245            if (index >= 0) {
246                ALOGW("setDeviceConnectionState() device already connected: %x", device);
247                return INVALID_OPERATION;
248            }
249            ALOGV("setDeviceConnectionState() connecting device %x", device);
250
251            // register new device as available
252            index = mAvailableOutputDevices.add(devDesc);
253            if (index >= 0) {
254                sp<HwModule> module = getModuleForDevice(device);
255                if (module == 0) {
256                    ALOGD("setDeviceConnectionState() could not find HW module for device %08x",
257                          device);
258                    mAvailableOutputDevices.remove(devDesc);
259                    return INVALID_OPERATION;
260                }
261                mAvailableOutputDevices[index]->mId = nextUniqueId();
262                mAvailableOutputDevices[index]->mModule = module;
263            } else {
264                return NO_MEMORY;
265            }
266
267            if (checkOutputsForDevice(devDesc, state, outputs, address) != NO_ERROR) {
268                mAvailableOutputDevices.remove(devDesc);
269                return INVALID_OPERATION;
270            }
271            // outputs should never be empty here
272            ALOG_ASSERT(outputs.size() != 0, "setDeviceConnectionState():"
273                    "checkOutputsForDevice() returned no outputs but status OK");
274            ALOGV("setDeviceConnectionState() checkOutputsForDevice() returned %zu outputs",
275                  outputs.size());
276            break;
277        // handle output device disconnection
278        case AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE: {
279            if (index < 0) {
280                ALOGW("setDeviceConnectionState() device not connected: %x", device);
281                return INVALID_OPERATION;
282            }
283
284            ALOGV("setDeviceConnectionState() disconnecting output device %x", device);
285
286            // Set Disconnect to HALs
287            AudioParameter param = AudioParameter(address);
288            param.addInt(String8(AUDIO_PARAMETER_DEVICE_DISCONNECT), device);
289            mpClientInterface->setParameters(AUDIO_IO_HANDLE_NONE, param.toString());
290
291            // remove device from available output devices
292            mAvailableOutputDevices.remove(devDesc);
293
294            checkOutputsForDevice(devDesc, state, outputs, address);
295            } break;
296
297        default:
298            ALOGE("setDeviceConnectionState() invalid state: %x", state);
299            return BAD_VALUE;
300        }
301
302        // checkA2dpSuspend must run before checkOutputForAllStrategies so that A2DP
303        // output is suspended before any tracks are moved to it
304        checkA2dpSuspend();
305        checkOutputForAllStrategies();
306        // outputs must be closed after checkOutputForAllStrategies() is executed
307        if (!outputs.isEmpty()) {
308            for (size_t i = 0; i < outputs.size(); i++) {
309                sp<AudioOutputDescriptor> desc = mOutputs.valueFor(outputs[i]);
310                // close unused outputs after device disconnection or direct outputs that have been
311                // opened by checkOutputsForDevice() to query dynamic parameters
312                if ((state == AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE) ||
313                        (((desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) != 0) &&
314                         (desc->mDirectOpenCount == 0))) {
315                    closeOutput(outputs[i]);
316                }
317            }
318            // check again after closing A2DP output to reset mA2dpSuspended if needed
319            checkA2dpSuspend();
320        }
321
322        updateDevicesAndOutputs();
323        if (mPhoneState == AUDIO_MODE_IN_CALL) {
324            audio_devices_t newDevice = getNewOutputDevice(mPrimaryOutput, false /*fromCache*/);
325            updateCallRouting(newDevice);
326        }
327        for (size_t i = 0; i < mOutputs.size(); i++) {
328            audio_io_handle_t output = mOutputs.keyAt(i);
329            if ((mPhoneState != AUDIO_MODE_IN_CALL) || (output != mPrimaryOutput)) {
330                audio_devices_t newDevice = getNewOutputDevice(mOutputs.keyAt(i),
331                                                               true /*fromCache*/);
332                // do not force device change on duplicated output because if device is 0, it will
333                // also force a device 0 for the two outputs it is duplicated to which may override
334                // a valid device selection on those outputs.
335                bool force = !mOutputs.valueAt(i)->isDuplicated()
336                        && (!deviceDistinguishesOnAddress(device)
337                                // always force when disconnecting (a non-duplicated device)
338                                || (state == AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE));
339                setOutputDevice(output, newDevice, force, 0);
340            }
341        }
342
343        mpClientInterface->onAudioPortListUpdate();
344        return NO_ERROR;
345    }  // end if is output device
346
347    // handle input devices
348    if (audio_is_input_device(device)) {
349        SortedVector <audio_io_handle_t> inputs;
350
351        sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
352        devDesc->mAddress = address;
353        ssize_t index = mAvailableInputDevices.indexOf(devDesc);
354        switch (state)
355        {
356        // handle input device connection
357        case AUDIO_POLICY_DEVICE_STATE_AVAILABLE: {
358            if (index >= 0) {
359                ALOGW("setDeviceConnectionState() device already connected: %d", device);
360                return INVALID_OPERATION;
361            }
362            sp<HwModule> module = getModuleForDevice(device);
363            if (module == NULL) {
364                ALOGW("setDeviceConnectionState(): could not find HW module for device %08x",
365                      device);
366                return INVALID_OPERATION;
367            }
368            if (checkInputsForDevice(device, state, inputs, address) != NO_ERROR) {
369                return INVALID_OPERATION;
370            }
371
372            index = mAvailableInputDevices.add(devDesc);
373            if (index >= 0) {
374                mAvailableInputDevices[index]->mId = nextUniqueId();
375                mAvailableInputDevices[index]->mModule = module;
376            } else {
377                return NO_MEMORY;
378            }
379        } break;
380
381        // handle input device disconnection
382        case AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE: {
383            if (index < 0) {
384                ALOGW("setDeviceConnectionState() device not connected: %d", device);
385                return INVALID_OPERATION;
386            }
387
388            ALOGV("setDeviceConnectionState() disconnecting input device %x", device);
389
390            // Set Disconnect to HALs
391            AudioParameter param = AudioParameter(address);
392            param.addInt(String8(AUDIO_PARAMETER_DEVICE_DISCONNECT), device);
393            mpClientInterface->setParameters(AUDIO_IO_HANDLE_NONE, param.toString());
394
395            checkInputsForDevice(device, state, inputs, address);
396            mAvailableInputDevices.remove(devDesc);
397
398        } break;
399
400        default:
401            ALOGE("setDeviceConnectionState() invalid state: %x", state);
402            return BAD_VALUE;
403        }
404
405        closeAllInputs();
406
407        if (mPhoneState == AUDIO_MODE_IN_CALL) {
408            audio_devices_t newDevice = getNewOutputDevice(mPrimaryOutput, false /*fromCache*/);
409            updateCallRouting(newDevice);
410        }
411
412        mpClientInterface->onAudioPortListUpdate();
413        return NO_ERROR;
414    } // end if is input device
415
416    ALOGW("setDeviceConnectionState() invalid device: %x", device);
417    return BAD_VALUE;
418}
419
420audio_policy_dev_state_t AudioPolicyManager::getDeviceConnectionState(audio_devices_t device,
421                                                  const char *device_address)
422{
423    audio_policy_dev_state_t state = AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
424    sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
425    devDesc->mAddress = (device_address == NULL) ? String8("") : String8(device_address);
426    // handle legacy remote submix case where the address was not always specified
427    if (deviceDistinguishesOnAddress(device) && (devDesc->mAddress.length() == 0)) {
428        devDesc->mAddress = String8("0");
429    }
430    ssize_t index;
431    DeviceVector *deviceVector;
432
433    if (audio_is_output_device(device)) {
434        deviceVector = &mAvailableOutputDevices;
435    } else if (audio_is_input_device(device)) {
436        deviceVector = &mAvailableInputDevices;
437    } else {
438        ALOGW("getDeviceConnectionState() invalid device type %08x", device);
439        return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
440    }
441
442    index = deviceVector->indexOf(devDesc);
443    if (index >= 0) {
444        return AUDIO_POLICY_DEVICE_STATE_AVAILABLE;
445    } else {
446        return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
447    }
448}
449
450void AudioPolicyManager::updateCallRouting(audio_devices_t rxDevice, int delayMs)
451{
452    bool createTxPatch = false;
453    struct audio_patch patch;
454    patch.num_sources = 1;
455    patch.num_sinks = 1;
456    status_t status;
457    audio_patch_handle_t afPatchHandle;
458    DeviceVector deviceList;
459
460    audio_devices_t txDevice = getDeviceForInputSource(AUDIO_SOURCE_VOICE_COMMUNICATION);
461    ALOGV("updateCallRouting device rxDevice %08x txDevice %08x", rxDevice, txDevice);
462
463    // release existing RX patch if any
464    if (mCallRxPatch != 0) {
465        mpClientInterface->releaseAudioPatch(mCallRxPatch->mAfPatchHandle, 0);
466        mCallRxPatch.clear();
467    }
468    // release TX patch if any
469    if (mCallTxPatch != 0) {
470        mpClientInterface->releaseAudioPatch(mCallTxPatch->mAfPatchHandle, 0);
471        mCallTxPatch.clear();
472    }
473
474    // If the RX device is on the primary HW module, then use legacy routing method for voice calls
475    // via setOutputDevice() on primary output.
476    // Otherwise, create two audio patches for TX and RX path.
477    if (availablePrimaryOutputDevices() & rxDevice) {
478        setOutputDevice(mPrimaryOutput, rxDevice, true, delayMs);
479        // If the TX device is also on the primary HW module, setOutputDevice() will take care
480        // of it due to legacy implementation. If not, create a patch.
481        if ((availablePrimaryInputDevices() & txDevice & ~AUDIO_DEVICE_BIT_IN)
482                == AUDIO_DEVICE_NONE) {
483            createTxPatch = true;
484        }
485    } else {
486        // create RX path audio patch
487        deviceList = mAvailableOutputDevices.getDevicesFromType(rxDevice);
488        ALOG_ASSERT(!deviceList.isEmpty(),
489                    "updateCallRouting() selected device not in output device list");
490        sp<DeviceDescriptor> rxSinkDeviceDesc = deviceList.itemAt(0);
491        deviceList = mAvailableInputDevices.getDevicesFromType(AUDIO_DEVICE_IN_TELEPHONY_RX);
492        ALOG_ASSERT(!deviceList.isEmpty(),
493                    "updateCallRouting() no telephony RX device");
494        sp<DeviceDescriptor> rxSourceDeviceDesc = deviceList.itemAt(0);
495
496        rxSourceDeviceDesc->toAudioPortConfig(&patch.sources[0]);
497        rxSinkDeviceDesc->toAudioPortConfig(&patch.sinks[0]);
498
499        // request to reuse existing output stream if one is already opened to reach the RX device
500        SortedVector<audio_io_handle_t> outputs =
501                                getOutputsForDevice(rxDevice, mOutputs);
502        audio_io_handle_t output = selectOutput(outputs,
503                                                AUDIO_OUTPUT_FLAG_NONE,
504                                                AUDIO_FORMAT_INVALID);
505        if (output != AUDIO_IO_HANDLE_NONE) {
506            sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
507            ALOG_ASSERT(!outputDesc->isDuplicated(),
508                        "updateCallRouting() RX device output is duplicated");
509            outputDesc->toAudioPortConfig(&patch.sources[1]);
510            patch.num_sources = 2;
511        }
512
513        afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
514        status = mpClientInterface->createAudioPatch(&patch, &afPatchHandle, 0);
515        ALOGW_IF(status != NO_ERROR, "updateCallRouting() error %d creating RX audio patch",
516                                               status);
517        if (status == NO_ERROR) {
518            mCallRxPatch = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
519                                       &patch, mUidCached);
520            mCallRxPatch->mAfPatchHandle = afPatchHandle;
521            mCallRxPatch->mUid = mUidCached;
522        }
523        createTxPatch = true;
524    }
525    if (createTxPatch) {
526
527        struct audio_patch patch;
528        patch.num_sources = 1;
529        patch.num_sinks = 1;
530        deviceList = mAvailableInputDevices.getDevicesFromType(txDevice);
531        ALOG_ASSERT(!deviceList.isEmpty(),
532                    "updateCallRouting() selected device not in input device list");
533        sp<DeviceDescriptor> txSourceDeviceDesc = deviceList.itemAt(0);
534        txSourceDeviceDesc->toAudioPortConfig(&patch.sources[0]);
535        deviceList = mAvailableOutputDevices.getDevicesFromType(AUDIO_DEVICE_OUT_TELEPHONY_TX);
536        ALOG_ASSERT(!deviceList.isEmpty(),
537                    "updateCallRouting() no telephony TX device");
538        sp<DeviceDescriptor> txSinkDeviceDesc = deviceList.itemAt(0);
539        txSinkDeviceDesc->toAudioPortConfig(&patch.sinks[0]);
540
541        SortedVector<audio_io_handle_t> outputs =
542                                getOutputsForDevice(AUDIO_DEVICE_OUT_TELEPHONY_TX, mOutputs);
543        audio_io_handle_t output = selectOutput(outputs,
544                                                AUDIO_OUTPUT_FLAG_NONE,
545                                                AUDIO_FORMAT_INVALID);
546        // request to reuse existing output stream if one is already opened to reach the TX
547        // path output device
548        if (output != AUDIO_IO_HANDLE_NONE) {
549            sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
550            ALOG_ASSERT(!outputDesc->isDuplicated(),
551                        "updateCallRouting() RX device output is duplicated");
552            outputDesc->toAudioPortConfig(&patch.sources[1]);
553            patch.num_sources = 2;
554        }
555
556        afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
557        status = mpClientInterface->createAudioPatch(&patch, &afPatchHandle, 0);
558        ALOGW_IF(status != NO_ERROR, "setPhoneState() error %d creating TX audio patch",
559                                               status);
560        if (status == NO_ERROR) {
561            mCallTxPatch = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
562                                       &patch, mUidCached);
563            mCallTxPatch->mAfPatchHandle = afPatchHandle;
564            mCallTxPatch->mUid = mUidCached;
565        }
566    }
567}
568
569void AudioPolicyManager::setPhoneState(audio_mode_t state)
570{
571    ALOGV("setPhoneState() state %d", state);
572    if (state < 0 || state >= AUDIO_MODE_CNT) {
573        ALOGW("setPhoneState() invalid state %d", state);
574        return;
575    }
576
577    if (state == mPhoneState ) {
578        ALOGW("setPhoneState() setting same state %d", state);
579        return;
580    }
581
582    // if leaving call state, handle special case of active streams
583    // pertaining to sonification strategy see handleIncallSonification()
584    if (isInCall()) {
585        ALOGV("setPhoneState() in call state management: new state is %d", state);
586        for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
587            if (stream == AUDIO_STREAM_PATCH) {
588                continue;
589            }
590            handleIncallSonification((audio_stream_type_t)stream, false, true);
591        }
592    }
593
594    // store previous phone state for management of sonification strategy below
595    int oldState = mPhoneState;
596    mPhoneState = state;
597    bool force = false;
598
599    // are we entering or starting a call
600    if (!isStateInCall(oldState) && isStateInCall(state)) {
601        ALOGV("  Entering call in setPhoneState()");
602        // force routing command to audio hardware when starting a call
603        // even if no device change is needed
604        force = true;
605        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
606            mStreams[AUDIO_STREAM_DTMF].mVolumeCurve[j] =
607                    sVolumeProfiles[AUDIO_STREAM_VOICE_CALL][j];
608        }
609    } else if (isStateInCall(oldState) && !isStateInCall(state)) {
610        ALOGV("  Exiting call in setPhoneState()");
611        // force routing command to audio hardware when exiting a call
612        // even if no device change is needed
613        force = true;
614        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
615            mStreams[AUDIO_STREAM_DTMF].mVolumeCurve[j] =
616                    sVolumeProfiles[AUDIO_STREAM_DTMF][j];
617        }
618    } else if (isStateInCall(state) && (state != oldState)) {
619        ALOGV("  Switching between telephony and VoIP in setPhoneState()");
620        // force routing command to audio hardware when switching between telephony and VoIP
621        // even if no device change is needed
622        force = true;
623    }
624
625    // check for device and output changes triggered by new phone state
626    checkA2dpSuspend();
627    checkOutputForAllStrategies();
628    updateDevicesAndOutputs();
629
630    sp<AudioOutputDescriptor> hwOutputDesc = mOutputs.valueFor(mPrimaryOutput);
631
632    int delayMs = 0;
633    if (isStateInCall(state)) {
634        nsecs_t sysTime = systemTime();
635        for (size_t i = 0; i < mOutputs.size(); i++) {
636            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
637            // mute media and sonification strategies and delay device switch by the largest
638            // latency of any output where either strategy is active.
639            // This avoid sending the ring tone or music tail into the earpiece or headset.
640            if ((desc->isStrategyActive(STRATEGY_MEDIA,
641                                     SONIFICATION_HEADSET_MUSIC_DELAY,
642                                     sysTime) ||
643                    desc->isStrategyActive(STRATEGY_SONIFICATION,
644                                         SONIFICATION_HEADSET_MUSIC_DELAY,
645                                         sysTime)) &&
646                    (delayMs < (int)desc->mLatency*2)) {
647                delayMs = desc->mLatency*2;
648            }
649            setStrategyMute(STRATEGY_MEDIA, true, mOutputs.keyAt(i));
650            setStrategyMute(STRATEGY_MEDIA, false, mOutputs.keyAt(i), MUTE_TIME_MS,
651                getDeviceForStrategy(STRATEGY_MEDIA, true /*fromCache*/));
652            setStrategyMute(STRATEGY_SONIFICATION, true, mOutputs.keyAt(i));
653            setStrategyMute(STRATEGY_SONIFICATION, false, mOutputs.keyAt(i), MUTE_TIME_MS,
654                getDeviceForStrategy(STRATEGY_SONIFICATION, true /*fromCache*/));
655        }
656    }
657
658    // Note that despite the fact that getNewOutputDevice() is called on the primary output,
659    // the device returned is not necessarily reachable via this output
660    audio_devices_t rxDevice = getNewOutputDevice(mPrimaryOutput, false /*fromCache*/);
661    // force routing command to audio hardware when ending call
662    // even if no device change is needed
663    if (isStateInCall(oldState) && rxDevice == AUDIO_DEVICE_NONE) {
664        rxDevice = hwOutputDesc->device();
665    }
666
667    if (state == AUDIO_MODE_IN_CALL) {
668        updateCallRouting(rxDevice, delayMs);
669    } else if (oldState == AUDIO_MODE_IN_CALL) {
670        if (mCallRxPatch != 0) {
671            mpClientInterface->releaseAudioPatch(mCallRxPatch->mAfPatchHandle, 0);
672            mCallRxPatch.clear();
673        }
674        if (mCallTxPatch != 0) {
675            mpClientInterface->releaseAudioPatch(mCallTxPatch->mAfPatchHandle, 0);
676            mCallTxPatch.clear();
677        }
678        setOutputDevice(mPrimaryOutput, rxDevice, force, 0);
679    } else {
680        setOutputDevice(mPrimaryOutput, rxDevice, force, 0);
681    }
682    // if entering in call state, handle special case of active streams
683    // pertaining to sonification strategy see handleIncallSonification()
684    if (isStateInCall(state)) {
685        ALOGV("setPhoneState() in call state management: new state is %d", state);
686        for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
687            if (stream == AUDIO_STREAM_PATCH) {
688                continue;
689            }
690            handleIncallSonification((audio_stream_type_t)stream, true, true);
691        }
692    }
693
694    // Flag that ringtone volume must be limited to music volume until we exit MODE_RINGTONE
695    if (state == AUDIO_MODE_RINGTONE &&
696        isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY)) {
697        mLimitRingtoneVolume = true;
698    } else {
699        mLimitRingtoneVolume = false;
700    }
701}
702
703void AudioPolicyManager::setForceUse(audio_policy_force_use_t usage,
704                                         audio_policy_forced_cfg_t config)
705{
706    ALOGV("setForceUse() usage %d, config %d, mPhoneState %d", usage, config, mPhoneState);
707
708    bool forceVolumeReeval = false;
709    switch(usage) {
710    case AUDIO_POLICY_FORCE_FOR_COMMUNICATION:
711        if (config != AUDIO_POLICY_FORCE_SPEAKER && config != AUDIO_POLICY_FORCE_BT_SCO &&
712            config != AUDIO_POLICY_FORCE_NONE) {
713            ALOGW("setForceUse() invalid config %d for FOR_COMMUNICATION", config);
714            return;
715        }
716        forceVolumeReeval = true;
717        mForceUse[usage] = config;
718        break;
719    case AUDIO_POLICY_FORCE_FOR_MEDIA:
720        if (config != AUDIO_POLICY_FORCE_HEADPHONES && config != AUDIO_POLICY_FORCE_BT_A2DP &&
721            config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
722            config != AUDIO_POLICY_FORCE_ANALOG_DOCK &&
723            config != AUDIO_POLICY_FORCE_DIGITAL_DOCK && config != AUDIO_POLICY_FORCE_NONE &&
724            config != AUDIO_POLICY_FORCE_NO_BT_A2DP && config != AUDIO_POLICY_FORCE_SPEAKER ) {
725            ALOGW("setForceUse() invalid config %d for FOR_MEDIA", config);
726            return;
727        }
728        mForceUse[usage] = config;
729        break;
730    case AUDIO_POLICY_FORCE_FOR_RECORD:
731        if (config != AUDIO_POLICY_FORCE_BT_SCO && config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
732            config != AUDIO_POLICY_FORCE_NONE) {
733            ALOGW("setForceUse() invalid config %d for FOR_RECORD", config);
734            return;
735        }
736        mForceUse[usage] = config;
737        break;
738    case AUDIO_POLICY_FORCE_FOR_DOCK:
739        if (config != AUDIO_POLICY_FORCE_NONE && config != AUDIO_POLICY_FORCE_BT_CAR_DOCK &&
740            config != AUDIO_POLICY_FORCE_BT_DESK_DOCK &&
741            config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
742            config != AUDIO_POLICY_FORCE_ANALOG_DOCK &&
743            config != AUDIO_POLICY_FORCE_DIGITAL_DOCK) {
744            ALOGW("setForceUse() invalid config %d for FOR_DOCK", config);
745        }
746        forceVolumeReeval = true;
747        mForceUse[usage] = config;
748        break;
749    case AUDIO_POLICY_FORCE_FOR_SYSTEM:
750        if (config != AUDIO_POLICY_FORCE_NONE &&
751            config != AUDIO_POLICY_FORCE_SYSTEM_ENFORCED) {
752            ALOGW("setForceUse() invalid config %d for FOR_SYSTEM", config);
753        }
754        forceVolumeReeval = true;
755        mForceUse[usage] = config;
756        break;
757    case AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO:
758        if (config != AUDIO_POLICY_FORCE_NONE &&
759            config != AUDIO_POLICY_FORCE_HDMI_SYSTEM_AUDIO_ENFORCED) {
760            ALOGW("setForceUse() invalid config %d forHDMI_SYSTEM_AUDIO", config);
761        }
762        mForceUse[usage] = config;
763        break;
764    default:
765        ALOGW("setForceUse() invalid usage %d", usage);
766        break;
767    }
768
769    // check for device and output changes triggered by new force usage
770    checkA2dpSuspend();
771    checkOutputForAllStrategies();
772    updateDevicesAndOutputs();
773    if (mPhoneState == AUDIO_MODE_IN_CALL) {
774        audio_devices_t newDevice = getNewOutputDevice(mPrimaryOutput, true /*fromCache*/);
775        updateCallRouting(newDevice);
776    }
777    for (size_t i = 0; i < mOutputs.size(); i++) {
778        audio_io_handle_t output = mOutputs.keyAt(i);
779        audio_devices_t newDevice = getNewOutputDevice(output, true /*fromCache*/);
780        if ((mPhoneState != AUDIO_MODE_IN_CALL) || (output != mPrimaryOutput)) {
781            setOutputDevice(output, newDevice, (newDevice != AUDIO_DEVICE_NONE));
782        }
783        if (forceVolumeReeval && (newDevice != AUDIO_DEVICE_NONE)) {
784            applyStreamVolumes(output, newDevice, 0, true);
785        }
786    }
787
788    audio_io_handle_t activeInput = getActiveInput();
789    if (activeInput != 0) {
790        setInputDevice(activeInput, getNewInputDevice(activeInput));
791    }
792
793}
794
795audio_policy_forced_cfg_t AudioPolicyManager::getForceUse(audio_policy_force_use_t usage)
796{
797    return mForceUse[usage];
798}
799
800void AudioPolicyManager::setSystemProperty(const char* property, const char* value)
801{
802    ALOGV("setSystemProperty() property %s, value %s", property, value);
803}
804
805// Find a direct output profile compatible with the parameters passed, even if the input flags do
806// not explicitly request a direct output
807sp<AudioPolicyManager::IOProfile> AudioPolicyManager::getProfileForDirectOutput(
808                                                               audio_devices_t device,
809                                                               uint32_t samplingRate,
810                                                               audio_format_t format,
811                                                               audio_channel_mask_t channelMask,
812                                                               audio_output_flags_t flags)
813{
814    for (size_t i = 0; i < mHwModules.size(); i++) {
815        if (mHwModules[i]->mHandle == 0) {
816            continue;
817        }
818        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++) {
819            sp<IOProfile> profile = mHwModules[i]->mOutputProfiles[j];
820            bool found = profile->isCompatibleProfile(device, samplingRate,
821                    NULL /*updatedSamplingRate*/, format, channelMask,
822                    flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD ?
823                        AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD : AUDIO_OUTPUT_FLAG_DIRECT);
824            if (found && (mAvailableOutputDevices.types() & profile->mSupportedDevices.types())) {
825                return profile;
826            }
827        }
828    }
829    return 0;
830}
831
832audio_io_handle_t AudioPolicyManager::getOutput(audio_stream_type_t stream,
833                                    uint32_t samplingRate,
834                                    audio_format_t format,
835                                    audio_channel_mask_t channelMask,
836                                    audio_output_flags_t flags,
837                                    const audio_offload_info_t *offloadInfo)
838{
839    routing_strategy strategy = getStrategy(stream);
840    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
841    ALOGV("getOutput() device %d, stream %d, samplingRate %d, format %x, channelMask %x, flags %x",
842          device, stream, samplingRate, format, channelMask, flags);
843
844    return getOutputForDevice(device, stream, samplingRate,format, channelMask, flags,
845            offloadInfo);
846}
847
848audio_io_handle_t AudioPolicyManager::getOutputForAttr(const audio_attributes_t *attr,
849                                    uint32_t samplingRate,
850                                    audio_format_t format,
851                                    audio_channel_mask_t channelMask,
852                                    audio_output_flags_t flags,
853                                    const audio_offload_info_t *offloadInfo)
854{
855    if (attr == NULL) {
856        ALOGE("getOutputForAttr() called with NULL audio attributes");
857        return 0;
858    }
859    ALOGV("getOutputForAttr() usage=%d, content=%d, tag=%s flags=%08x",
860            attr->usage, attr->content_type, attr->tags, attr->flags);
861
862    // TODO this is where filtering for custom policies (rerouting, dynamic sources) will go
863    routing_strategy strategy = (routing_strategy) getStrategyForAttr(attr);
864    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
865
866    if ((attr->flags & AUDIO_FLAG_HW_AV_SYNC) != 0) {
867        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_HW_AV_SYNC);
868    }
869
870    ALOGV("getOutputForAttr() device 0x%x, samplingRate %d, format %x, channelMask %x, flags %x",
871          device, samplingRate, format, channelMask, flags);
872
873    audio_stream_type_t stream = streamTypefromAttributesInt(attr);
874    return getOutputForDevice(device, stream, samplingRate, format, channelMask, flags,
875                offloadInfo);
876}
877
878audio_io_handle_t AudioPolicyManager::getOutputForDevice(
879        audio_devices_t device,
880        audio_stream_type_t stream,
881        uint32_t samplingRate,
882        audio_format_t format,
883        audio_channel_mask_t channelMask,
884        audio_output_flags_t flags,
885        const audio_offload_info_t *offloadInfo)
886{
887    audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
888    uint32_t latency = 0;
889    status_t status;
890
891#ifdef AUDIO_POLICY_TEST
892    if (mCurOutput != 0) {
893        ALOGV("getOutput() test output mCurOutput %d, samplingRate %d, format %d, channelMask %x, mDirectOutput %d",
894                mCurOutput, mTestSamplingRate, mTestFormat, mTestChannels, mDirectOutput);
895
896        if (mTestOutputs[mCurOutput] == 0) {
897            ALOGV("getOutput() opening test output");
898            sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(NULL);
899            outputDesc->mDevice = mTestDevice;
900            outputDesc->mLatency = mTestLatencyMs;
901            outputDesc->mFlags =
902                    (audio_output_flags_t)(mDirectOutput ? AUDIO_OUTPUT_FLAG_DIRECT : 0);
903            outputDesc->mRefCount[stream] = 0;
904            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
905            config.sample_rate = mTestSamplingRate;
906            config.channel_mask = mTestChannels;
907            config.format = mTestFormat;
908            if (offloadInfo != NULL) {
909                config.offload_info = *offloadInfo;
910            }
911            status = mpClientInterface->openOutput(0,
912                                                  &mTestOutputs[mCurOutput],
913                                                  &config,
914                                                  &outputDesc->mDevice,
915                                                  String8(""),
916                                                  &outputDesc->mLatency,
917                                                  outputDesc->mFlags);
918            if (status == NO_ERROR) {
919                outputDesc->mSamplingRate = config.sample_rate;
920                outputDesc->mFormat = config.format;
921                outputDesc->mChannelMask = config.channel_mask;
922                AudioParameter outputCmd = AudioParameter();
923                outputCmd.addInt(String8("set_id"),mCurOutput);
924                mpClientInterface->setParameters(mTestOutputs[mCurOutput],outputCmd.toString());
925                addOutput(mTestOutputs[mCurOutput], outputDesc);
926            }
927        }
928        return mTestOutputs[mCurOutput];
929    }
930#endif //AUDIO_POLICY_TEST
931
932    // open a direct output if required by specified parameters
933    //force direct flag if offload flag is set: offloading implies a direct output stream
934    // and all common behaviors are driven by checking only the direct flag
935    // this should normally be set appropriately in the policy configuration file
936    if ((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
937        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_DIRECT);
938    }
939    if ((flags & AUDIO_OUTPUT_FLAG_HW_AV_SYNC) != 0) {
940        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_DIRECT);
941    }
942
943    sp<IOProfile> profile;
944
945    // skip direct output selection if the request can obviously be attached to a mixed output
946    // and not explicitly requested
947    if (((flags & AUDIO_OUTPUT_FLAG_DIRECT) == 0) &&
948            audio_is_linear_pcm(format) && samplingRate <= MAX_MIXER_SAMPLING_RATE &&
949            audio_channel_count_from_out_mask(channelMask) <= 2) {
950        goto non_direct_output;
951    }
952
953    // Do not allow offloading if one non offloadable effect is enabled. This prevents from
954    // creating an offloaded track and tearing it down immediately after start when audioflinger
955    // detects there is an active non offloadable effect.
956    // FIXME: We should check the audio session here but we do not have it in this context.
957    // This may prevent offloading in rare situations where effects are left active by apps
958    // in the background.
959
960    if (((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) == 0) ||
961            !isNonOffloadableEffectEnabled()) {
962        profile = getProfileForDirectOutput(device,
963                                           samplingRate,
964                                           format,
965                                           channelMask,
966                                           (audio_output_flags_t)flags);
967    }
968
969    if (profile != 0) {
970        sp<AudioOutputDescriptor> outputDesc = NULL;
971
972        for (size_t i = 0; i < mOutputs.size(); i++) {
973            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
974            if (!desc->isDuplicated() && (profile == desc->mProfile)) {
975                outputDesc = desc;
976                // reuse direct output if currently open and configured with same parameters
977                if ((samplingRate == outputDesc->mSamplingRate) &&
978                        (format == outputDesc->mFormat) &&
979                        (channelMask == outputDesc->mChannelMask)) {
980                    outputDesc->mDirectOpenCount++;
981                    ALOGV("getOutput() reusing direct output %d", mOutputs.keyAt(i));
982                    return mOutputs.keyAt(i);
983                }
984            }
985        }
986        // close direct output if currently open and configured with different parameters
987        if (outputDesc != NULL) {
988            closeOutput(outputDesc->mIoHandle);
989        }
990        outputDesc = new AudioOutputDescriptor(profile);
991        outputDesc->mDevice = device;
992        outputDesc->mLatency = 0;
993        outputDesc->mFlags =(audio_output_flags_t) (outputDesc->mFlags | flags);
994        audio_config_t config = AUDIO_CONFIG_INITIALIZER;
995        config.sample_rate = samplingRate;
996        config.channel_mask = channelMask;
997        config.format = format;
998        if (offloadInfo != NULL) {
999            config.offload_info = *offloadInfo;
1000        }
1001        status = mpClientInterface->openOutput(profile->mModule->mHandle,
1002                                               &output,
1003                                               &config,
1004                                               &outputDesc->mDevice,
1005                                               String8(""),
1006                                               &outputDesc->mLatency,
1007                                               outputDesc->mFlags);
1008
1009        // only accept an output with the requested parameters
1010        if (status != NO_ERROR ||
1011            (samplingRate != 0 && samplingRate != config.sample_rate) ||
1012            (format != AUDIO_FORMAT_DEFAULT && format != config.format) ||
1013            (channelMask != 0 && channelMask != config.channel_mask)) {
1014            ALOGV("getOutput() failed opening direct output: output %d samplingRate %d %d,"
1015                    "format %d %d, channelMask %04x %04x", output, samplingRate,
1016                    outputDesc->mSamplingRate, format, outputDesc->mFormat, channelMask,
1017                    outputDesc->mChannelMask);
1018            if (output != AUDIO_IO_HANDLE_NONE) {
1019                mpClientInterface->closeOutput(output);
1020            }
1021            return AUDIO_IO_HANDLE_NONE;
1022        }
1023        outputDesc->mSamplingRate = config.sample_rate;
1024        outputDesc->mChannelMask = config.channel_mask;
1025        outputDesc->mFormat = config.format;
1026        outputDesc->mRefCount[stream] = 0;
1027        outputDesc->mStopTime[stream] = 0;
1028        outputDesc->mDirectOpenCount = 1;
1029
1030        audio_io_handle_t srcOutput = getOutputForEffect();
1031        addOutput(output, outputDesc);
1032        audio_io_handle_t dstOutput = getOutputForEffect();
1033        if (dstOutput == output) {
1034            mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, srcOutput, dstOutput);
1035        }
1036        mPreviousOutputs = mOutputs;
1037        ALOGV("getOutput() returns new direct output %d", output);
1038        mpClientInterface->onAudioPortListUpdate();
1039        return output;
1040    }
1041
1042non_direct_output:
1043
1044    // ignoring channel mask due to downmix capability in mixer
1045
1046    // open a non direct output
1047
1048    // for non direct outputs, only PCM is supported
1049    if (audio_is_linear_pcm(format)) {
1050        // get which output is suitable for the specified stream. The actual
1051        // routing change will happen when startOutput() will be called
1052        SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(device, mOutputs);
1053
1054        // at this stage we should ignore the DIRECT flag as no direct output could be found earlier
1055        flags = (audio_output_flags_t)(flags & ~AUDIO_OUTPUT_FLAG_DIRECT);
1056        output = selectOutput(outputs, flags, format);
1057    }
1058    ALOGW_IF((output == 0), "getOutput() could not find output for stream %d, samplingRate %d,"
1059            "format %d, channels %x, flags %x", stream, samplingRate, format, channelMask, flags);
1060
1061    ALOGV("getOutput() returns output %d", output);
1062
1063    return output;
1064}
1065
1066audio_io_handle_t AudioPolicyManager::selectOutput(const SortedVector<audio_io_handle_t>& outputs,
1067                                                       audio_output_flags_t flags,
1068                                                       audio_format_t format)
1069{
1070    // select one output among several that provide a path to a particular device or set of
1071    // devices (the list was previously build by getOutputsForDevice()).
1072    // The priority is as follows:
1073    // 1: the output with the highest number of requested policy flags
1074    // 2: the primary output
1075    // 3: the first output in the list
1076
1077    if (outputs.size() == 0) {
1078        return 0;
1079    }
1080    if (outputs.size() == 1) {
1081        return outputs[0];
1082    }
1083
1084    int maxCommonFlags = 0;
1085    audio_io_handle_t outputFlags = 0;
1086    audio_io_handle_t outputPrimary = 0;
1087
1088    for (size_t i = 0; i < outputs.size(); i++) {
1089        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(outputs[i]);
1090        if (!outputDesc->isDuplicated()) {
1091            // if a valid format is specified, skip output if not compatible
1092            if (format != AUDIO_FORMAT_INVALID) {
1093                if (outputDesc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) {
1094                    if (format != outputDesc->mFormat) {
1095                        continue;
1096                    }
1097                } else if (!audio_is_linear_pcm(format)) {
1098                    continue;
1099                }
1100            }
1101
1102            int commonFlags = popcount(outputDesc->mProfile->mFlags & flags);
1103            if (commonFlags > maxCommonFlags) {
1104                outputFlags = outputs[i];
1105                maxCommonFlags = commonFlags;
1106                ALOGV("selectOutput() commonFlags for output %d, %04x", outputs[i], commonFlags);
1107            }
1108            if (outputDesc->mProfile->mFlags & AUDIO_OUTPUT_FLAG_PRIMARY) {
1109                outputPrimary = outputs[i];
1110            }
1111        }
1112    }
1113
1114    if (outputFlags != 0) {
1115        return outputFlags;
1116    }
1117    if (outputPrimary != 0) {
1118        return outputPrimary;
1119    }
1120
1121    return outputs[0];
1122}
1123
1124status_t AudioPolicyManager::startOutput(audio_io_handle_t output,
1125                                             audio_stream_type_t stream,
1126                                             int session)
1127{
1128    ALOGV("startOutput() output %d, stream %d, session %d", output, stream, session);
1129    ssize_t index = mOutputs.indexOfKey(output);
1130    if (index < 0) {
1131        ALOGW("startOutput() unknown output %d", output);
1132        return BAD_VALUE;
1133    }
1134
1135    // cannot start playback of STREAM_TTS if any other output is being used
1136    uint32_t beaconMuteLatency = 0;
1137    if (stream == AUDIO_STREAM_TTS) {
1138        ALOGV("\t found BEACON stream");
1139        if (isAnyOutputActive(AUDIO_STREAM_TTS /*streamToIgnore*/)) {
1140            return INVALID_OPERATION;
1141        } else {
1142            beaconMuteLatency = handleEventForBeacon(STARTING_BEACON);
1143        }
1144    } else {
1145        // some playback other than beacon starts
1146        beaconMuteLatency = handleEventForBeacon(STARTING_OUTPUT);
1147    }
1148
1149    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1150
1151    // increment usage count for this stream on the requested output:
1152    // NOTE that the usage count is the same for duplicated output and hardware output which is
1153    // necessary for a correct control of hardware output routing by startOutput() and stopOutput()
1154    outputDesc->changeRefCount(stream, 1);
1155
1156    if (outputDesc->mRefCount[stream] == 1) {
1157        audio_devices_t newDevice = getNewOutputDevice(output, false /*fromCache*/);
1158        routing_strategy strategy = getStrategy(stream);
1159        bool shouldWait = (strategy == STRATEGY_SONIFICATION) ||
1160                            (strategy == STRATEGY_SONIFICATION_RESPECTFUL) ||
1161                            (beaconMuteLatency > 0);
1162        uint32_t waitMs = beaconMuteLatency;
1163        bool force = false;
1164        for (size_t i = 0; i < mOutputs.size(); i++) {
1165            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
1166            if (desc != outputDesc) {
1167                // force a device change if any other output is managed by the same hw
1168                // module and has a current device selection that differs from selected device.
1169                // In this case, the audio HAL must receive the new device selection so that it can
1170                // change the device currently selected by the other active output.
1171                if (outputDesc->sharesHwModuleWith(desc) &&
1172                    desc->device() != newDevice) {
1173                    force = true;
1174                }
1175                // wait for audio on other active outputs to be presented when starting
1176                // a notification so that audio focus effect can propagate, or that a mute/unmute
1177                // event occurred for beacon
1178                uint32_t latency = desc->latency();
1179                if (shouldWait && desc->isActive(latency * 2) && (waitMs < latency)) {
1180                    waitMs = latency;
1181                }
1182            }
1183        }
1184        uint32_t muteWaitMs = setOutputDevice(output, newDevice, force);
1185
1186        // handle special case for sonification while in call
1187        if (isInCall()) {
1188            handleIncallSonification(stream, true, false);
1189        }
1190
1191        // apply volume rules for current stream and device if necessary
1192        checkAndSetVolume(stream,
1193                          mStreams[stream].getVolumeIndex(newDevice),
1194                          output,
1195                          newDevice);
1196
1197        // update the outputs if starting an output with a stream that can affect notification
1198        // routing
1199        handleNotificationRoutingForStream(stream);
1200        if (waitMs > muteWaitMs) {
1201            usleep((waitMs - muteWaitMs) * 2 * 1000);
1202        }
1203    }
1204    return NO_ERROR;
1205}
1206
1207
1208status_t AudioPolicyManager::stopOutput(audio_io_handle_t output,
1209                                            audio_stream_type_t stream,
1210                                            int session)
1211{
1212    ALOGV("stopOutput() output %d, stream %d, session %d", output, stream, session);
1213    ssize_t index = mOutputs.indexOfKey(output);
1214    if (index < 0) {
1215        ALOGW("stopOutput() unknown output %d", output);
1216        return BAD_VALUE;
1217    }
1218
1219    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1220
1221    // always handle stream stop, check which stream type is stopping
1222    handleEventForBeacon(stream == AUDIO_STREAM_TTS ? STOPPING_BEACON : STOPPING_OUTPUT);
1223
1224    // handle special case for sonification while in call
1225    if (isInCall()) {
1226        handleIncallSonification(stream, false, false);
1227    }
1228
1229    if (outputDesc->mRefCount[stream] > 0) {
1230        // decrement usage count of this stream on the output
1231        outputDesc->changeRefCount(stream, -1);
1232        // store time at which the stream was stopped - see isStreamActive()
1233        if (outputDesc->mRefCount[stream] == 0) {
1234            outputDesc->mStopTime[stream] = systemTime();
1235            audio_devices_t newDevice = getNewOutputDevice(output, false /*fromCache*/);
1236            // delay the device switch by twice the latency because stopOutput() is executed when
1237            // the track stop() command is received and at that time the audio track buffer can
1238            // still contain data that needs to be drained. The latency only covers the audio HAL
1239            // and kernel buffers. Also the latency does not always include additional delay in the
1240            // audio path (audio DSP, CODEC ...)
1241            setOutputDevice(output, newDevice, false, outputDesc->mLatency*2);
1242
1243            // force restoring the device selection on other active outputs if it differs from the
1244            // one being selected for this output
1245            for (size_t i = 0; i < mOutputs.size(); i++) {
1246                audio_io_handle_t curOutput = mOutputs.keyAt(i);
1247                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
1248                if (curOutput != output &&
1249                        desc->isActive() &&
1250                        outputDesc->sharesHwModuleWith(desc) &&
1251                        (newDevice != desc->device())) {
1252                    setOutputDevice(curOutput,
1253                                    getNewOutputDevice(curOutput, false /*fromCache*/),
1254                                    true,
1255                                    outputDesc->mLatency*2);
1256                }
1257            }
1258            // update the outputs if stopping one with a stream that can affect notification routing
1259            handleNotificationRoutingForStream(stream);
1260        }
1261        return NO_ERROR;
1262    } else {
1263        ALOGW("stopOutput() refcount is already 0 for output %d", output);
1264        return INVALID_OPERATION;
1265    }
1266}
1267
1268void AudioPolicyManager::releaseOutput(audio_io_handle_t output)
1269{
1270    ALOGV("releaseOutput() %d", output);
1271    ssize_t index = mOutputs.indexOfKey(output);
1272    if (index < 0) {
1273        ALOGW("releaseOutput() releasing unknown output %d", output);
1274        return;
1275    }
1276
1277#ifdef AUDIO_POLICY_TEST
1278    int testIndex = testOutputIndex(output);
1279    if (testIndex != 0) {
1280        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1281        if (outputDesc->isActive()) {
1282            mpClientInterface->closeOutput(output);
1283            mOutputs.removeItem(output);
1284            mTestOutputs[testIndex] = 0;
1285        }
1286        return;
1287    }
1288#endif //AUDIO_POLICY_TEST
1289
1290    sp<AudioOutputDescriptor> desc = mOutputs.valueAt(index);
1291    if (desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) {
1292        if (desc->mDirectOpenCount <= 0) {
1293            ALOGW("releaseOutput() invalid open count %d for output %d",
1294                                                              desc->mDirectOpenCount, output);
1295            return;
1296        }
1297        if (--desc->mDirectOpenCount == 0) {
1298            closeOutput(output);
1299            // If effects where present on the output, audioflinger moved them to the primary
1300            // output by default: move them back to the appropriate output.
1301            audio_io_handle_t dstOutput = getOutputForEffect();
1302            if (dstOutput != mPrimaryOutput) {
1303                mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, mPrimaryOutput, dstOutput);
1304            }
1305            mpClientInterface->onAudioPortListUpdate();
1306        }
1307    }
1308}
1309
1310
1311audio_io_handle_t AudioPolicyManager::getInput(audio_source_t inputSource,
1312                                    uint32_t samplingRate,
1313                                    audio_format_t format,
1314                                    audio_channel_mask_t channelMask,
1315                                    audio_session_t session,
1316                                    audio_input_flags_t flags)
1317{
1318    ALOGV("getInput() inputSource %d, samplingRate %d, format %d, channelMask %x, session %d, "
1319          "flags %#x",
1320          inputSource, samplingRate, format, channelMask, session, flags);
1321
1322    audio_devices_t device = getDeviceForInputSource(inputSource);
1323
1324    if (device == AUDIO_DEVICE_NONE) {
1325        ALOGW("getInput() could not find device for inputSource %d", inputSource);
1326        return AUDIO_IO_HANDLE_NONE;
1327    }
1328
1329    // adapt channel selection to input source
1330    switch (inputSource) {
1331    case AUDIO_SOURCE_VOICE_UPLINK:
1332        channelMask = AUDIO_CHANNEL_IN_VOICE_UPLINK;
1333        break;
1334    case AUDIO_SOURCE_VOICE_DOWNLINK:
1335        channelMask = AUDIO_CHANNEL_IN_VOICE_DNLINK;
1336        break;
1337    case AUDIO_SOURCE_VOICE_CALL:
1338        channelMask = AUDIO_CHANNEL_IN_VOICE_UPLINK | AUDIO_CHANNEL_IN_VOICE_DNLINK;
1339        break;
1340    default:
1341        break;
1342    }
1343
1344    audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
1345    bool isSoundTrigger = false;
1346    audio_source_t halInputSource = inputSource;
1347    if (inputSource == AUDIO_SOURCE_HOTWORD) {
1348        ssize_t index = mSoundTriggerSessions.indexOfKey(session);
1349        if (index >= 0) {
1350            input = mSoundTriggerSessions.valueFor(session);
1351            isSoundTrigger = true;
1352            flags = (audio_input_flags_t)(flags | AUDIO_INPUT_FLAG_HW_HOTWORD);
1353            ALOGV("SoundTrigger capture on session %d input %d", session, input);
1354        } else {
1355            halInputSource = AUDIO_SOURCE_VOICE_RECOGNITION;
1356        }
1357    }
1358
1359    sp<IOProfile> profile = getInputProfile(device,
1360                                         samplingRate,
1361                                         format,
1362                                         channelMask,
1363                                         flags);
1364    if (profile == 0) {
1365        //retry without flags
1366        audio_input_flags_t log_flags = flags;
1367        flags = AUDIO_INPUT_FLAG_NONE;
1368        profile = getInputProfile(device,
1369                                 samplingRate,
1370                                 format,
1371                                 channelMask,
1372                                 flags);
1373        if (profile == 0) {
1374            ALOGW("getInput() could not find profile for device 0x%X, samplingRate %u, format %#x, "
1375                    "channelMask 0x%X, flags %#x",
1376                    device, samplingRate, format, channelMask, log_flags);
1377            return AUDIO_IO_HANDLE_NONE;
1378        }
1379    }
1380
1381    if (profile->mModule->mHandle == 0) {
1382        ALOGE("getInput(): HW module %s not opened", profile->mModule->mName);
1383        return AUDIO_IO_HANDLE_NONE;
1384    }
1385
1386    audio_config_t config = AUDIO_CONFIG_INITIALIZER;
1387    config.sample_rate = samplingRate;
1388    config.channel_mask = channelMask;
1389    config.format = format;
1390
1391    // handle legacy remote submix case where the address was not always specified
1392    String8 address = deviceDistinguishesOnAddress(device) ? String8("0") : String8("");
1393
1394    status_t status = mpClientInterface->openInput(profile->mModule->mHandle,
1395                                                   &input,
1396                                                   &config,
1397                                                   &device,
1398                                                   address,
1399                                                   halInputSource,
1400                                                   flags);
1401
1402    // only accept input with the exact requested set of parameters
1403    if (status != NO_ERROR ||
1404        (samplingRate != config.sample_rate) ||
1405        (format != config.format) ||
1406        (channelMask != config.channel_mask)) {
1407        ALOGW("getInput() failed opening input: samplingRate %d, format %d, channelMask %x",
1408                samplingRate, format, channelMask);
1409        if (input != AUDIO_IO_HANDLE_NONE) {
1410            mpClientInterface->closeInput(input);
1411        }
1412        return AUDIO_IO_HANDLE_NONE;
1413    }
1414
1415    sp<AudioInputDescriptor> inputDesc = new AudioInputDescriptor(profile);
1416    inputDesc->mInputSource = inputSource;
1417    inputDesc->mRefCount = 0;
1418    inputDesc->mOpenRefCount = 1;
1419    inputDesc->mSamplingRate = samplingRate;
1420    inputDesc->mFormat = format;
1421    inputDesc->mChannelMask = channelMask;
1422    inputDesc->mDevice = device;
1423    inputDesc->mSessions.add(session);
1424    inputDesc->mIsSoundTrigger = isSoundTrigger;
1425
1426    addInput(input, inputDesc);
1427    mpClientInterface->onAudioPortListUpdate();
1428    return input;
1429}
1430
1431status_t AudioPolicyManager::startInput(audio_io_handle_t input,
1432                                        audio_session_t session)
1433{
1434    ALOGV("startInput() input %d", input);
1435    ssize_t index = mInputs.indexOfKey(input);
1436    if (index < 0) {
1437        ALOGW("startInput() unknown input %d", input);
1438        return BAD_VALUE;
1439    }
1440    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1441
1442    index = inputDesc->mSessions.indexOf(session);
1443    if (index < 0) {
1444        ALOGW("startInput() unknown session %d on input %d", session, input);
1445        return BAD_VALUE;
1446    }
1447
1448    // virtual input devices are compatible with other input devices
1449    if (!isVirtualInputDevice(inputDesc->mDevice)) {
1450
1451        // for a non-virtual input device, check if there is another (non-virtual) active input
1452        audio_io_handle_t activeInput = getActiveInput();
1453        if (activeInput != 0 && activeInput != input) {
1454
1455            // If the already active input uses AUDIO_SOURCE_HOTWORD then it is closed,
1456            // otherwise the active input continues and the new input cannot be started.
1457            sp<AudioInputDescriptor> activeDesc = mInputs.valueFor(activeInput);
1458            if (activeDesc->mInputSource == AUDIO_SOURCE_HOTWORD) {
1459                ALOGW("startInput(%d) preempting low-priority input %d", input, activeInput);
1460                stopInput(activeInput, activeDesc->mSessions.itemAt(0));
1461                releaseInput(activeInput, activeDesc->mSessions.itemAt(0));
1462            } else {
1463                ALOGE("startInput(%d) failed: other input %d already started", input, activeInput);
1464                return INVALID_OPERATION;
1465            }
1466        }
1467    }
1468
1469    if (inputDesc->mRefCount == 0) {
1470        if (activeInputsCount() == 0) {
1471            SoundTrigger::setCaptureState(true);
1472        }
1473        setInputDevice(input, getNewInputDevice(input), true /* force */);
1474
1475        // Automatically enable the remote submix output when input is started.
1476        // For remote submix (a virtual device), we open only one input per capture request.
1477        if (audio_is_remote_submix_device(inputDesc->mDevice)) {
1478            setDeviceConnectionState(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
1479                    AUDIO_POLICY_DEVICE_STATE_AVAILABLE, AUDIO_REMOTE_SUBMIX_DEVICE_ADDRESS);
1480        }
1481    }
1482
1483    ALOGV("AudioPolicyManager::startInput() input source = %d", inputDesc->mInputSource);
1484
1485    inputDesc->mRefCount++;
1486    return NO_ERROR;
1487}
1488
1489status_t AudioPolicyManager::stopInput(audio_io_handle_t input,
1490                                       audio_session_t session)
1491{
1492    ALOGV("stopInput() input %d", input);
1493    ssize_t index = mInputs.indexOfKey(input);
1494    if (index < 0) {
1495        ALOGW("stopInput() unknown input %d", input);
1496        return BAD_VALUE;
1497    }
1498    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1499
1500    index = inputDesc->mSessions.indexOf(session);
1501    if (index < 0) {
1502        ALOGW("stopInput() unknown session %d on input %d", session, input);
1503        return BAD_VALUE;
1504    }
1505
1506    if (inputDesc->mRefCount == 0) {
1507        ALOGW("stopInput() input %d already stopped", input);
1508        return INVALID_OPERATION;
1509    }
1510
1511    inputDesc->mRefCount--;
1512    if (inputDesc->mRefCount == 0) {
1513
1514        // automatically disable the remote submix output when input is stopped
1515        if (audio_is_remote_submix_device(inputDesc->mDevice)) {
1516            setDeviceConnectionState(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
1517                    AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE, AUDIO_REMOTE_SUBMIX_DEVICE_ADDRESS);
1518        }
1519
1520        resetInputDevice(input);
1521
1522        if (activeInputsCount() == 0) {
1523            SoundTrigger::setCaptureState(false);
1524        }
1525    }
1526    return NO_ERROR;
1527}
1528
1529void AudioPolicyManager::releaseInput(audio_io_handle_t input,
1530                                      audio_session_t session)
1531{
1532    ALOGV("releaseInput() %d", input);
1533    ssize_t index = mInputs.indexOfKey(input);
1534    if (index < 0) {
1535        ALOGW("releaseInput() releasing unknown input %d", input);
1536        return;
1537    }
1538    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1539    ALOG_ASSERT(inputDesc != 0);
1540
1541    index = inputDesc->mSessions.indexOf(session);
1542    if (index < 0) {
1543        ALOGW("releaseInput() unknown session %d on input %d", session, input);
1544        return;
1545    }
1546    inputDesc->mSessions.remove(session);
1547    if (inputDesc->mOpenRefCount == 0) {
1548        ALOGW("releaseInput() invalid open ref count %d", inputDesc->mOpenRefCount);
1549        return;
1550    }
1551    inputDesc->mOpenRefCount--;
1552    if (inputDesc->mOpenRefCount > 0) {
1553        ALOGV("releaseInput() exit > 0");
1554        return;
1555    }
1556
1557    closeInput(input);
1558    mpClientInterface->onAudioPortListUpdate();
1559    ALOGV("releaseInput() exit");
1560}
1561
1562void AudioPolicyManager::closeAllInputs() {
1563    bool patchRemoved = false;
1564
1565    for(size_t input_index = 0; input_index < mInputs.size(); input_index++) {
1566        sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(input_index);
1567        ssize_t patch_index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
1568        if (patch_index >= 0) {
1569            sp<AudioPatch> patchDesc = mAudioPatches.valueAt(patch_index);
1570            status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
1571            mAudioPatches.removeItemsAt(patch_index);
1572            patchRemoved = true;
1573        }
1574        mpClientInterface->closeInput(mInputs.keyAt(input_index));
1575    }
1576    mInputs.clear();
1577    nextAudioPortGeneration();
1578
1579    if (patchRemoved) {
1580        mpClientInterface->onAudioPatchListUpdate();
1581    }
1582}
1583
1584void AudioPolicyManager::initStreamVolume(audio_stream_type_t stream,
1585                                            int indexMin,
1586                                            int indexMax)
1587{
1588    ALOGV("initStreamVolume() stream %d, min %d, max %d", stream , indexMin, indexMax);
1589    if (indexMin < 0 || indexMin >= indexMax) {
1590        ALOGW("initStreamVolume() invalid index limits for stream %d, min %d, max %d", stream , indexMin, indexMax);
1591        return;
1592    }
1593    mStreams[stream].mIndexMin = indexMin;
1594    mStreams[stream].mIndexMax = indexMax;
1595    //FIXME: AUDIO_STREAM_ACCESSIBILITY volume follows AUDIO_STREAM_MUSIC for now
1596    if (stream == AUDIO_STREAM_MUSIC) {
1597        mStreams[AUDIO_STREAM_ACCESSIBILITY].mIndexMin = indexMin;
1598        mStreams[AUDIO_STREAM_ACCESSIBILITY].mIndexMax = indexMax;
1599    }
1600}
1601
1602status_t AudioPolicyManager::setStreamVolumeIndex(audio_stream_type_t stream,
1603                                                      int index,
1604                                                      audio_devices_t device)
1605{
1606
1607    if ((index < mStreams[stream].mIndexMin) || (index > mStreams[stream].mIndexMax)) {
1608        return BAD_VALUE;
1609    }
1610    if (!audio_is_output_device(device)) {
1611        return BAD_VALUE;
1612    }
1613
1614    // Force max volume if stream cannot be muted
1615    if (!mStreams[stream].mCanBeMuted) index = mStreams[stream].mIndexMax;
1616
1617    ALOGV("setStreamVolumeIndex() stream %d, device %04x, index %d",
1618          stream, device, index);
1619
1620    // if device is AUDIO_DEVICE_OUT_DEFAULT set default value and
1621    // clear all device specific values
1622    if (device == AUDIO_DEVICE_OUT_DEFAULT) {
1623        mStreams[stream].mIndexCur.clear();
1624    }
1625    mStreams[stream].mIndexCur.add(device, index);
1626
1627    // update volume on all outputs whose current device is also selected by the same
1628    // strategy as the device specified by the caller
1629    audio_devices_t strategyDevice = getDeviceForStrategy(getStrategy(stream), true /*fromCache*/);
1630
1631
1632    //FIXME: AUDIO_STREAM_ACCESSIBILITY volume follows AUDIO_STREAM_MUSIC for now
1633    audio_devices_t accessibilityDevice = AUDIO_DEVICE_NONE;
1634    if (stream == AUDIO_STREAM_MUSIC) {
1635        mStreams[AUDIO_STREAM_ACCESSIBILITY].mIndexCur.add(device, index);
1636        accessibilityDevice = getDeviceForStrategy(STRATEGY_ACCESSIBILITY, true /*fromCache*/);
1637    }
1638    if ((device != AUDIO_DEVICE_OUT_DEFAULT) &&
1639            (device & (strategyDevice | accessibilityDevice)) == 0) {
1640        return NO_ERROR;
1641    }
1642    status_t status = NO_ERROR;
1643    for (size_t i = 0; i < mOutputs.size(); i++) {
1644        audio_devices_t curDevice =
1645                getDeviceForVolume(mOutputs.valueAt(i)->device());
1646        if ((device == AUDIO_DEVICE_OUT_DEFAULT) || ((curDevice & strategyDevice) != 0)) {
1647            status_t volStatus = checkAndSetVolume(stream, index, mOutputs.keyAt(i), curDevice);
1648            if (volStatus != NO_ERROR) {
1649                status = volStatus;
1650            }
1651        }
1652        if ((device == AUDIO_DEVICE_OUT_DEFAULT) || ((curDevice & accessibilityDevice) != 0)) {
1653            status_t volStatus = checkAndSetVolume(AUDIO_STREAM_ACCESSIBILITY,
1654                                                   index, mOutputs.keyAt(i), curDevice);
1655        }
1656    }
1657    return status;
1658}
1659
1660status_t AudioPolicyManager::getStreamVolumeIndex(audio_stream_type_t stream,
1661                                                      int *index,
1662                                                      audio_devices_t device)
1663{
1664    if (index == NULL) {
1665        return BAD_VALUE;
1666    }
1667    if (!audio_is_output_device(device)) {
1668        return BAD_VALUE;
1669    }
1670    // if device is AUDIO_DEVICE_OUT_DEFAULT, return volume for device corresponding to
1671    // the strategy the stream belongs to.
1672    if (device == AUDIO_DEVICE_OUT_DEFAULT) {
1673        device = getDeviceForStrategy(getStrategy(stream), true /*fromCache*/);
1674    }
1675    device = getDeviceForVolume(device);
1676
1677    *index =  mStreams[stream].getVolumeIndex(device);
1678    ALOGV("getStreamVolumeIndex() stream %d device %08x index %d", stream, device, *index);
1679    return NO_ERROR;
1680}
1681
1682audio_io_handle_t AudioPolicyManager::selectOutputForEffects(
1683                                            const SortedVector<audio_io_handle_t>& outputs)
1684{
1685    // select one output among several suitable for global effects.
1686    // The priority is as follows:
1687    // 1: An offloaded output. If the effect ends up not being offloadable,
1688    //    AudioFlinger will invalidate the track and the offloaded output
1689    //    will be closed causing the effect to be moved to a PCM output.
1690    // 2: A deep buffer output
1691    // 3: the first output in the list
1692
1693    if (outputs.size() == 0) {
1694        return 0;
1695    }
1696
1697    audio_io_handle_t outputOffloaded = 0;
1698    audio_io_handle_t outputDeepBuffer = 0;
1699
1700    for (size_t i = 0; i < outputs.size(); i++) {
1701        sp<AudioOutputDescriptor> desc = mOutputs.valueFor(outputs[i]);
1702        ALOGV("selectOutputForEffects outputs[%zu] flags %x", i, desc->mFlags);
1703        if ((desc->mFlags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
1704            outputOffloaded = outputs[i];
1705        }
1706        if ((desc->mFlags & AUDIO_OUTPUT_FLAG_DEEP_BUFFER) != 0) {
1707            outputDeepBuffer = outputs[i];
1708        }
1709    }
1710
1711    ALOGV("selectOutputForEffects outputOffloaded %d outputDeepBuffer %d",
1712          outputOffloaded, outputDeepBuffer);
1713    if (outputOffloaded != 0) {
1714        return outputOffloaded;
1715    }
1716    if (outputDeepBuffer != 0) {
1717        return outputDeepBuffer;
1718    }
1719
1720    return outputs[0];
1721}
1722
1723audio_io_handle_t AudioPolicyManager::getOutputForEffect(const effect_descriptor_t *desc)
1724{
1725    // apply simple rule where global effects are attached to the same output as MUSIC streams
1726
1727    routing_strategy strategy = getStrategy(AUDIO_STREAM_MUSIC);
1728    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
1729    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(device, mOutputs);
1730
1731    audio_io_handle_t output = selectOutputForEffects(dstOutputs);
1732    ALOGV("getOutputForEffect() got output %d for fx %s flags %x",
1733          output, (desc == NULL) ? "unspecified" : desc->name,  (desc == NULL) ? 0 : desc->flags);
1734
1735    return output;
1736}
1737
1738status_t AudioPolicyManager::registerEffect(const effect_descriptor_t *desc,
1739                                audio_io_handle_t io,
1740                                uint32_t strategy,
1741                                int session,
1742                                int id)
1743{
1744    ssize_t index = mOutputs.indexOfKey(io);
1745    if (index < 0) {
1746        index = mInputs.indexOfKey(io);
1747        if (index < 0) {
1748            ALOGW("registerEffect() unknown io %d", io);
1749            return INVALID_OPERATION;
1750        }
1751    }
1752
1753    if (mTotalEffectsMemory + desc->memoryUsage > getMaxEffectsMemory()) {
1754        ALOGW("registerEffect() memory limit exceeded for Fx %s, Memory %d KB",
1755                desc->name, desc->memoryUsage);
1756        return INVALID_OPERATION;
1757    }
1758    mTotalEffectsMemory += desc->memoryUsage;
1759    ALOGV("registerEffect() effect %s, io %d, strategy %d session %d id %d",
1760            desc->name, io, strategy, session, id);
1761    ALOGV("registerEffect() memory %d, total memory %d", desc->memoryUsage, mTotalEffectsMemory);
1762
1763    sp<EffectDescriptor> effectDesc = new EffectDescriptor();
1764    memcpy (&effectDesc->mDesc, desc, sizeof(effect_descriptor_t));
1765    effectDesc->mIo = io;
1766    effectDesc->mStrategy = (routing_strategy)strategy;
1767    effectDesc->mSession = session;
1768    effectDesc->mEnabled = false;
1769
1770    mEffects.add(id, effectDesc);
1771
1772    return NO_ERROR;
1773}
1774
1775status_t AudioPolicyManager::unregisterEffect(int id)
1776{
1777    ssize_t index = mEffects.indexOfKey(id);
1778    if (index < 0) {
1779        ALOGW("unregisterEffect() unknown effect ID %d", id);
1780        return INVALID_OPERATION;
1781    }
1782
1783    sp<EffectDescriptor> effectDesc = mEffects.valueAt(index);
1784
1785    setEffectEnabled(effectDesc, false);
1786
1787    if (mTotalEffectsMemory < effectDesc->mDesc.memoryUsage) {
1788        ALOGW("unregisterEffect() memory %d too big for total %d",
1789                effectDesc->mDesc.memoryUsage, mTotalEffectsMemory);
1790        effectDesc->mDesc.memoryUsage = mTotalEffectsMemory;
1791    }
1792    mTotalEffectsMemory -= effectDesc->mDesc.memoryUsage;
1793    ALOGV("unregisterEffect() effect %s, ID %d, memory %d total memory %d",
1794            effectDesc->mDesc.name, id, effectDesc->mDesc.memoryUsage, mTotalEffectsMemory);
1795
1796    mEffects.removeItem(id);
1797
1798    return NO_ERROR;
1799}
1800
1801status_t AudioPolicyManager::setEffectEnabled(int id, bool enabled)
1802{
1803    ssize_t index = mEffects.indexOfKey(id);
1804    if (index < 0) {
1805        ALOGW("unregisterEffect() unknown effect ID %d", id);
1806        return INVALID_OPERATION;
1807    }
1808
1809    return setEffectEnabled(mEffects.valueAt(index), enabled);
1810}
1811
1812status_t AudioPolicyManager::setEffectEnabled(const sp<EffectDescriptor>& effectDesc, bool enabled)
1813{
1814    if (enabled == effectDesc->mEnabled) {
1815        ALOGV("setEffectEnabled(%s) effect already %s",
1816             enabled?"true":"false", enabled?"enabled":"disabled");
1817        return INVALID_OPERATION;
1818    }
1819
1820    if (enabled) {
1821        if (mTotalEffectsCpuLoad + effectDesc->mDesc.cpuLoad > getMaxEffectsCpuLoad()) {
1822            ALOGW("setEffectEnabled(true) CPU Load limit exceeded for Fx %s, CPU %f MIPS",
1823                 effectDesc->mDesc.name, (float)effectDesc->mDesc.cpuLoad/10);
1824            return INVALID_OPERATION;
1825        }
1826        mTotalEffectsCpuLoad += effectDesc->mDesc.cpuLoad;
1827        ALOGV("setEffectEnabled(true) total CPU %d", mTotalEffectsCpuLoad);
1828    } else {
1829        if (mTotalEffectsCpuLoad < effectDesc->mDesc.cpuLoad) {
1830            ALOGW("setEffectEnabled(false) CPU load %d too high for total %d",
1831                    effectDesc->mDesc.cpuLoad, mTotalEffectsCpuLoad);
1832            effectDesc->mDesc.cpuLoad = mTotalEffectsCpuLoad;
1833        }
1834        mTotalEffectsCpuLoad -= effectDesc->mDesc.cpuLoad;
1835        ALOGV("setEffectEnabled(false) total CPU %d", mTotalEffectsCpuLoad);
1836    }
1837    effectDesc->mEnabled = enabled;
1838    return NO_ERROR;
1839}
1840
1841bool AudioPolicyManager::isNonOffloadableEffectEnabled()
1842{
1843    for (size_t i = 0; i < mEffects.size(); i++) {
1844        sp<EffectDescriptor> effectDesc = mEffects.valueAt(i);
1845        if (effectDesc->mEnabled && (effectDesc->mStrategy == STRATEGY_MEDIA) &&
1846                ((effectDesc->mDesc.flags & EFFECT_FLAG_OFFLOAD_SUPPORTED) == 0)) {
1847            ALOGV("isNonOffloadableEffectEnabled() non offloadable effect %s enabled on session %d",
1848                  effectDesc->mDesc.name, effectDesc->mSession);
1849            return true;
1850        }
1851    }
1852    return false;
1853}
1854
1855bool AudioPolicyManager::isStreamActive(audio_stream_type_t stream, uint32_t inPastMs) const
1856{
1857    nsecs_t sysTime = systemTime();
1858    for (size_t i = 0; i < mOutputs.size(); i++) {
1859        const sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
1860        if (outputDesc->isStreamActive(stream, inPastMs, sysTime)) {
1861            return true;
1862        }
1863    }
1864    return false;
1865}
1866
1867bool AudioPolicyManager::isStreamActiveRemotely(audio_stream_type_t stream,
1868                                                    uint32_t inPastMs) const
1869{
1870    nsecs_t sysTime = systemTime();
1871    for (size_t i = 0; i < mOutputs.size(); i++) {
1872        const sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
1873        if (((outputDesc->device() & APM_AUDIO_OUT_DEVICE_REMOTE_ALL) != 0) &&
1874                outputDesc->isStreamActive(stream, inPastMs, sysTime)) {
1875            return true;
1876        }
1877    }
1878    return false;
1879}
1880
1881bool AudioPolicyManager::isSourceActive(audio_source_t source) const
1882{
1883    for (size_t i = 0; i < mInputs.size(); i++) {
1884        const sp<AudioInputDescriptor>  inputDescriptor = mInputs.valueAt(i);
1885        if ((inputDescriptor->mInputSource == (int)source ||
1886                (source == AUDIO_SOURCE_VOICE_RECOGNITION &&
1887                 inputDescriptor->mInputSource == AUDIO_SOURCE_HOTWORD))
1888             && (inputDescriptor->mRefCount > 0)) {
1889            return true;
1890        }
1891    }
1892    return false;
1893}
1894
1895
1896status_t AudioPolicyManager::dump(int fd)
1897{
1898    const size_t SIZE = 256;
1899    char buffer[SIZE];
1900    String8 result;
1901
1902    snprintf(buffer, SIZE, "\nAudioPolicyManager Dump: %p\n", this);
1903    result.append(buffer);
1904
1905    snprintf(buffer, SIZE, " Primary Output: %d\n", mPrimaryOutput);
1906    result.append(buffer);
1907    snprintf(buffer, SIZE, " Phone state: %d\n", mPhoneState);
1908    result.append(buffer);
1909    snprintf(buffer, SIZE, " Force use for communications %d\n",
1910             mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]);
1911    result.append(buffer);
1912    snprintf(buffer, SIZE, " Force use for media %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA]);
1913    result.append(buffer);
1914    snprintf(buffer, SIZE, " Force use for record %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD]);
1915    result.append(buffer);
1916    snprintf(buffer, SIZE, " Force use for dock %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_DOCK]);
1917    result.append(buffer);
1918    snprintf(buffer, SIZE, " Force use for system %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM]);
1919    result.append(buffer);
1920    snprintf(buffer, SIZE, " Force use for hdmi system audio %d\n",
1921            mForceUse[AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO]);
1922    result.append(buffer);
1923
1924    snprintf(buffer, SIZE, " Available output devices:\n");
1925    result.append(buffer);
1926    write(fd, result.string(), result.size());
1927    for (size_t i = 0; i < mAvailableOutputDevices.size(); i++) {
1928        mAvailableOutputDevices[i]->dump(fd, 2, i);
1929    }
1930    snprintf(buffer, SIZE, "\n Available input devices:\n");
1931    write(fd, buffer, strlen(buffer));
1932    for (size_t i = 0; i < mAvailableInputDevices.size(); i++) {
1933        mAvailableInputDevices[i]->dump(fd, 2, i);
1934    }
1935
1936    snprintf(buffer, SIZE, "\nHW Modules dump:\n");
1937    write(fd, buffer, strlen(buffer));
1938    for (size_t i = 0; i < mHwModules.size(); i++) {
1939        snprintf(buffer, SIZE, "- HW Module %zu:\n", i + 1);
1940        write(fd, buffer, strlen(buffer));
1941        mHwModules[i]->dump(fd);
1942    }
1943
1944    snprintf(buffer, SIZE, "\nOutputs dump:\n");
1945    write(fd, buffer, strlen(buffer));
1946    for (size_t i = 0; i < mOutputs.size(); i++) {
1947        snprintf(buffer, SIZE, "- Output %d dump:\n", mOutputs.keyAt(i));
1948        write(fd, buffer, strlen(buffer));
1949        mOutputs.valueAt(i)->dump(fd);
1950    }
1951
1952    snprintf(buffer, SIZE, "\nInputs dump:\n");
1953    write(fd, buffer, strlen(buffer));
1954    for (size_t i = 0; i < mInputs.size(); i++) {
1955        snprintf(buffer, SIZE, "- Input %d dump:\n", mInputs.keyAt(i));
1956        write(fd, buffer, strlen(buffer));
1957        mInputs.valueAt(i)->dump(fd);
1958    }
1959
1960    snprintf(buffer, SIZE, "\nStreams dump:\n");
1961    write(fd, buffer, strlen(buffer));
1962    snprintf(buffer, SIZE,
1963             " Stream  Can be muted  Index Min  Index Max  Index Cur [device : index]...\n");
1964    write(fd, buffer, strlen(buffer));
1965    for (size_t i = 0; i < AUDIO_STREAM_CNT; i++) {
1966        snprintf(buffer, SIZE, " %02zu      ", i);
1967        write(fd, buffer, strlen(buffer));
1968        mStreams[i].dump(fd);
1969    }
1970
1971    snprintf(buffer, SIZE, "\nTotal Effects CPU: %f MIPS, Total Effects memory: %d KB\n",
1972            (float)mTotalEffectsCpuLoad/10, mTotalEffectsMemory);
1973    write(fd, buffer, strlen(buffer));
1974
1975    snprintf(buffer, SIZE, "Registered effects:\n");
1976    write(fd, buffer, strlen(buffer));
1977    for (size_t i = 0; i < mEffects.size(); i++) {
1978        snprintf(buffer, SIZE, "- Effect %d dump:\n", mEffects.keyAt(i));
1979        write(fd, buffer, strlen(buffer));
1980        mEffects.valueAt(i)->dump(fd);
1981    }
1982
1983    snprintf(buffer, SIZE, "\nAudio Patches:\n");
1984    write(fd, buffer, strlen(buffer));
1985    for (size_t i = 0; i < mAudioPatches.size(); i++) {
1986        mAudioPatches[i]->dump(fd, 2, i);
1987    }
1988
1989    return NO_ERROR;
1990}
1991
1992// This function checks for the parameters which can be offloaded.
1993// This can be enhanced depending on the capability of the DSP and policy
1994// of the system.
1995bool AudioPolicyManager::isOffloadSupported(const audio_offload_info_t& offloadInfo)
1996{
1997    ALOGV("isOffloadSupported: SR=%u, CM=0x%x, Format=0x%x, StreamType=%d,"
1998     " BitRate=%u, duration=%" PRId64 " us, has_video=%d",
1999     offloadInfo.sample_rate, offloadInfo.channel_mask,
2000     offloadInfo.format,
2001     offloadInfo.stream_type, offloadInfo.bit_rate, offloadInfo.duration_us,
2002     offloadInfo.has_video);
2003
2004    // Check if offload has been disabled
2005    char propValue[PROPERTY_VALUE_MAX];
2006    if (property_get("audio.offload.disable", propValue, "0")) {
2007        if (atoi(propValue) != 0) {
2008            ALOGV("offload disabled by audio.offload.disable=%s", propValue );
2009            return false;
2010        }
2011    }
2012
2013    // Check if stream type is music, then only allow offload as of now.
2014    if (offloadInfo.stream_type != AUDIO_STREAM_MUSIC)
2015    {
2016        ALOGV("isOffloadSupported: stream_type != MUSIC, returning false");
2017        return false;
2018    }
2019
2020    //TODO: enable audio offloading with video when ready
2021    if (offloadInfo.has_video)
2022    {
2023        ALOGV("isOffloadSupported: has_video == true, returning false");
2024        return false;
2025    }
2026
2027    //If duration is less than minimum value defined in property, return false
2028    if (property_get("audio.offload.min.duration.secs", propValue, NULL)) {
2029        if (offloadInfo.duration_us < (atoi(propValue) * 1000000 )) {
2030            ALOGV("Offload denied by duration < audio.offload.min.duration.secs(=%s)", propValue);
2031            return false;
2032        }
2033    } else if (offloadInfo.duration_us < OFFLOAD_DEFAULT_MIN_DURATION_SECS * 1000000) {
2034        ALOGV("Offload denied by duration < default min(=%u)", OFFLOAD_DEFAULT_MIN_DURATION_SECS);
2035        return false;
2036    }
2037
2038    // Do not allow offloading if one non offloadable effect is enabled. This prevents from
2039    // creating an offloaded track and tearing it down immediately after start when audioflinger
2040    // detects there is an active non offloadable effect.
2041    // FIXME: We should check the audio session here but we do not have it in this context.
2042    // This may prevent offloading in rare situations where effects are left active by apps
2043    // in the background.
2044    if (isNonOffloadableEffectEnabled()) {
2045        return false;
2046    }
2047
2048    // See if there is a profile to support this.
2049    // AUDIO_DEVICE_NONE
2050    sp<IOProfile> profile = getProfileForDirectOutput(AUDIO_DEVICE_NONE /*ignore device */,
2051                                            offloadInfo.sample_rate,
2052                                            offloadInfo.format,
2053                                            offloadInfo.channel_mask,
2054                                            AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD);
2055    ALOGV("isOffloadSupported() profile %sfound", profile != 0 ? "" : "NOT ");
2056    return (profile != 0);
2057}
2058
2059status_t AudioPolicyManager::listAudioPorts(audio_port_role_t role,
2060                                            audio_port_type_t type,
2061                                            unsigned int *num_ports,
2062                                            struct audio_port *ports,
2063                                            unsigned int *generation)
2064{
2065    if (num_ports == NULL || (*num_ports != 0 && ports == NULL) ||
2066            generation == NULL) {
2067        return BAD_VALUE;
2068    }
2069    ALOGV("listAudioPorts() role %d type %d num_ports %d ports %p", role, type, *num_ports, ports);
2070    if (ports == NULL) {
2071        *num_ports = 0;
2072    }
2073
2074    size_t portsWritten = 0;
2075    size_t portsMax = *num_ports;
2076    *num_ports = 0;
2077    if (type == AUDIO_PORT_TYPE_NONE || type == AUDIO_PORT_TYPE_DEVICE) {
2078        if (role == AUDIO_PORT_ROLE_SINK || role == AUDIO_PORT_ROLE_NONE) {
2079            for (size_t i = 0;
2080                    i  < mAvailableOutputDevices.size() && portsWritten < portsMax; i++) {
2081                mAvailableOutputDevices[i]->toAudioPort(&ports[portsWritten++]);
2082            }
2083            *num_ports += mAvailableOutputDevices.size();
2084        }
2085        if (role == AUDIO_PORT_ROLE_SOURCE || role == AUDIO_PORT_ROLE_NONE) {
2086            for (size_t i = 0;
2087                    i  < mAvailableInputDevices.size() && portsWritten < portsMax; i++) {
2088                mAvailableInputDevices[i]->toAudioPort(&ports[portsWritten++]);
2089            }
2090            *num_ports += mAvailableInputDevices.size();
2091        }
2092    }
2093    if (type == AUDIO_PORT_TYPE_NONE || type == AUDIO_PORT_TYPE_MIX) {
2094        if (role == AUDIO_PORT_ROLE_SINK || role == AUDIO_PORT_ROLE_NONE) {
2095            for (size_t i = 0; i < mInputs.size() && portsWritten < portsMax; i++) {
2096                mInputs[i]->toAudioPort(&ports[portsWritten++]);
2097            }
2098            *num_ports += mInputs.size();
2099        }
2100        if (role == AUDIO_PORT_ROLE_SOURCE || role == AUDIO_PORT_ROLE_NONE) {
2101            size_t numOutputs = 0;
2102            for (size_t i = 0; i < mOutputs.size(); i++) {
2103                if (!mOutputs[i]->isDuplicated()) {
2104                    numOutputs++;
2105                    if (portsWritten < portsMax) {
2106                        mOutputs[i]->toAudioPort(&ports[portsWritten++]);
2107                    }
2108                }
2109            }
2110            *num_ports += numOutputs;
2111        }
2112    }
2113    *generation = curAudioPortGeneration();
2114    ALOGV("listAudioPorts() got %zu ports needed %d", portsWritten, *num_ports);
2115    return NO_ERROR;
2116}
2117
2118status_t AudioPolicyManager::getAudioPort(struct audio_port *port __unused)
2119{
2120    return NO_ERROR;
2121}
2122
2123sp<AudioPolicyManager::AudioOutputDescriptor> AudioPolicyManager::getOutputFromId(
2124                                                                    audio_port_handle_t id) const
2125{
2126    sp<AudioOutputDescriptor> outputDesc = NULL;
2127    for (size_t i = 0; i < mOutputs.size(); i++) {
2128        outputDesc = mOutputs.valueAt(i);
2129        if (outputDesc->mId == id) {
2130            break;
2131        }
2132    }
2133    return outputDesc;
2134}
2135
2136sp<AudioPolicyManager::AudioInputDescriptor> AudioPolicyManager::getInputFromId(
2137                                                                    audio_port_handle_t id) const
2138{
2139    sp<AudioInputDescriptor> inputDesc = NULL;
2140    for (size_t i = 0; i < mInputs.size(); i++) {
2141        inputDesc = mInputs.valueAt(i);
2142        if (inputDesc->mId == id) {
2143            break;
2144        }
2145    }
2146    return inputDesc;
2147}
2148
2149sp <AudioPolicyManager::HwModule> AudioPolicyManager::getModuleForDevice(
2150                                                                    audio_devices_t device) const
2151{
2152    sp <HwModule> module;
2153
2154    for (size_t i = 0; i < mHwModules.size(); i++) {
2155        if (mHwModules[i]->mHandle == 0) {
2156            continue;
2157        }
2158        if (audio_is_output_device(device)) {
2159            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
2160            {
2161                if (mHwModules[i]->mOutputProfiles[j]->mSupportedDevices.types() & device) {
2162                    return mHwModules[i];
2163                }
2164            }
2165        } else {
2166            for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++) {
2167                if (mHwModules[i]->mInputProfiles[j]->mSupportedDevices.types() &
2168                        device & ~AUDIO_DEVICE_BIT_IN) {
2169                    return mHwModules[i];
2170                }
2171            }
2172        }
2173    }
2174    return module;
2175}
2176
2177sp <AudioPolicyManager::HwModule> AudioPolicyManager::getModuleFromName(const char *name) const
2178{
2179    sp <HwModule> module;
2180
2181    for (size_t i = 0; i < mHwModules.size(); i++)
2182    {
2183        if (strcmp(mHwModules[i]->mName, name) == 0) {
2184            return mHwModules[i];
2185        }
2186    }
2187    return module;
2188}
2189
2190audio_devices_t AudioPolicyManager::availablePrimaryOutputDevices()
2191{
2192    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
2193    audio_devices_t devices = outputDesc->mProfile->mSupportedDevices.types();
2194    return devices & mAvailableOutputDevices.types();
2195}
2196
2197audio_devices_t AudioPolicyManager::availablePrimaryInputDevices()
2198{
2199    audio_module_handle_t primaryHandle =
2200                                mOutputs.valueFor(mPrimaryOutput)->mProfile->mModule->mHandle;
2201    audio_devices_t devices = AUDIO_DEVICE_NONE;
2202    for (size_t i = 0; i < mAvailableInputDevices.size(); i++) {
2203        if (mAvailableInputDevices[i]->mModule->mHandle == primaryHandle) {
2204            devices |= mAvailableInputDevices[i]->mDeviceType;
2205        }
2206    }
2207    return devices;
2208}
2209
2210status_t AudioPolicyManager::createAudioPatch(const struct audio_patch *patch,
2211                                               audio_patch_handle_t *handle,
2212                                               uid_t uid)
2213{
2214    ALOGV("createAudioPatch()");
2215
2216    if (handle == NULL || patch == NULL) {
2217        return BAD_VALUE;
2218    }
2219    ALOGV("createAudioPatch() num sources %d num sinks %d", patch->num_sources, patch->num_sinks);
2220
2221    if (patch->num_sources == 0 || patch->num_sources > AUDIO_PATCH_PORTS_MAX ||
2222            patch->num_sinks == 0 || patch->num_sinks > AUDIO_PATCH_PORTS_MAX) {
2223        return BAD_VALUE;
2224    }
2225    // only one source per audio patch supported for now
2226    if (patch->num_sources > 1) {
2227        return INVALID_OPERATION;
2228    }
2229
2230    if (patch->sources[0].role != AUDIO_PORT_ROLE_SOURCE) {
2231        return INVALID_OPERATION;
2232    }
2233    for (size_t i = 0; i < patch->num_sinks; i++) {
2234        if (patch->sinks[i].role != AUDIO_PORT_ROLE_SINK) {
2235            return INVALID_OPERATION;
2236        }
2237    }
2238
2239    sp<AudioPatch> patchDesc;
2240    ssize_t index = mAudioPatches.indexOfKey(*handle);
2241
2242    ALOGV("createAudioPatch source id %d role %d type %d", patch->sources[0].id,
2243                                                           patch->sources[0].role,
2244                                                           patch->sources[0].type);
2245#if LOG_NDEBUG == 0
2246    for (size_t i = 0; i < patch->num_sinks; i++) {
2247        ALOGV("createAudioPatch sink %d: id %d role %d type %d", i, patch->sinks[i].id,
2248                                                             patch->sinks[i].role,
2249                                                             patch->sinks[i].type);
2250    }
2251#endif
2252
2253    if (index >= 0) {
2254        patchDesc = mAudioPatches.valueAt(index);
2255        ALOGV("createAudioPatch() mUidCached %d patchDesc->mUid %d uid %d",
2256                                                                  mUidCached, patchDesc->mUid, uid);
2257        if (patchDesc->mUid != mUidCached && uid != patchDesc->mUid) {
2258            return INVALID_OPERATION;
2259        }
2260    } else {
2261        *handle = 0;
2262    }
2263
2264    if (patch->sources[0].type == AUDIO_PORT_TYPE_MIX) {
2265        sp<AudioOutputDescriptor> outputDesc = getOutputFromId(patch->sources[0].id);
2266        if (outputDesc == NULL) {
2267            ALOGV("createAudioPatch() output not found for id %d", patch->sources[0].id);
2268            return BAD_VALUE;
2269        }
2270        ALOG_ASSERT(!outputDesc->isDuplicated(),"duplicated output %d in source in ports",
2271                                                outputDesc->mIoHandle);
2272        if (patchDesc != 0) {
2273            if (patchDesc->mPatch.sources[0].id != patch->sources[0].id) {
2274                ALOGV("createAudioPatch() source id differs for patch current id %d new id %d",
2275                                          patchDesc->mPatch.sources[0].id, patch->sources[0].id);
2276                return BAD_VALUE;
2277            }
2278        }
2279        DeviceVector devices;
2280        for (size_t i = 0; i < patch->num_sinks; i++) {
2281            // Only support mix to devices connection
2282            // TODO add support for mix to mix connection
2283            if (patch->sinks[i].type != AUDIO_PORT_TYPE_DEVICE) {
2284                ALOGV("createAudioPatch() source mix but sink is not a device");
2285                return INVALID_OPERATION;
2286            }
2287            sp<DeviceDescriptor> devDesc =
2288                    mAvailableOutputDevices.getDeviceFromId(patch->sinks[i].id);
2289            if (devDesc == 0) {
2290                ALOGV("createAudioPatch() out device not found for id %d", patch->sinks[i].id);
2291                return BAD_VALUE;
2292            }
2293
2294            if (!outputDesc->mProfile->isCompatibleProfile(devDesc->mDeviceType,
2295                                                           patch->sources[0].sample_rate,
2296                                                         NULL,  // updatedSamplingRate
2297                                                         patch->sources[0].format,
2298                                                         patch->sources[0].channel_mask,
2299                                                         AUDIO_OUTPUT_FLAG_NONE /*FIXME*/)) {
2300                ALOGV("createAudioPatch() profile not supported for device %08x",
2301                      devDesc->mDeviceType);
2302                return INVALID_OPERATION;
2303            }
2304            devices.add(devDesc);
2305        }
2306        if (devices.size() == 0) {
2307            return INVALID_OPERATION;
2308        }
2309
2310        // TODO: reconfigure output format and channels here
2311        ALOGV("createAudioPatch() setting device %08x on output %d",
2312              devices.types(), outputDesc->mIoHandle);
2313        setOutputDevice(outputDesc->mIoHandle, devices.types(), true, 0, handle);
2314        index = mAudioPatches.indexOfKey(*handle);
2315        if (index >= 0) {
2316            if (patchDesc != 0 && patchDesc != mAudioPatches.valueAt(index)) {
2317                ALOGW("createAudioPatch() setOutputDevice() did not reuse the patch provided");
2318            }
2319            patchDesc = mAudioPatches.valueAt(index);
2320            patchDesc->mUid = uid;
2321            ALOGV("createAudioPatch() success");
2322        } else {
2323            ALOGW("createAudioPatch() setOutputDevice() failed to create a patch");
2324            return INVALID_OPERATION;
2325        }
2326    } else if (patch->sources[0].type == AUDIO_PORT_TYPE_DEVICE) {
2327        if (patch->sinks[0].type == AUDIO_PORT_TYPE_MIX) {
2328            // input device to input mix connection
2329            // only one sink supported when connecting an input device to a mix
2330            if (patch->num_sinks > 1) {
2331                return INVALID_OPERATION;
2332            }
2333            sp<AudioInputDescriptor> inputDesc = getInputFromId(patch->sinks[0].id);
2334            if (inputDesc == NULL) {
2335                return BAD_VALUE;
2336            }
2337            if (patchDesc != 0) {
2338                if (patchDesc->mPatch.sinks[0].id != patch->sinks[0].id) {
2339                    return BAD_VALUE;
2340                }
2341            }
2342            sp<DeviceDescriptor> devDesc =
2343                    mAvailableInputDevices.getDeviceFromId(patch->sources[0].id);
2344            if (devDesc == 0) {
2345                return BAD_VALUE;
2346            }
2347
2348            if (!inputDesc->mProfile->isCompatibleProfile(devDesc->mDeviceType,
2349                                                         patch->sinks[0].sample_rate,
2350                                                         NULL, /*updatedSampleRate*/
2351                                                         patch->sinks[0].format,
2352                                                         patch->sinks[0].channel_mask,
2353                                                         // FIXME for the parameter type,
2354                                                         // and the NONE
2355                                                         (audio_output_flags_t)
2356                                                            AUDIO_INPUT_FLAG_NONE)) {
2357                return INVALID_OPERATION;
2358            }
2359            // TODO: reconfigure output format and channels here
2360            ALOGV("createAudioPatch() setting device %08x on output %d",
2361                                                  devDesc->mDeviceType, inputDesc->mIoHandle);
2362            setInputDevice(inputDesc->mIoHandle, devDesc->mDeviceType, true, handle);
2363            index = mAudioPatches.indexOfKey(*handle);
2364            if (index >= 0) {
2365                if (patchDesc != 0 && patchDesc != mAudioPatches.valueAt(index)) {
2366                    ALOGW("createAudioPatch() setInputDevice() did not reuse the patch provided");
2367                }
2368                patchDesc = mAudioPatches.valueAt(index);
2369                patchDesc->mUid = uid;
2370                ALOGV("createAudioPatch() success");
2371            } else {
2372                ALOGW("createAudioPatch() setInputDevice() failed to create a patch");
2373                return INVALID_OPERATION;
2374            }
2375        } else if (patch->sinks[0].type == AUDIO_PORT_TYPE_DEVICE) {
2376            // device to device connection
2377            if (patchDesc != 0) {
2378                if (patchDesc->mPatch.sources[0].id != patch->sources[0].id) {
2379                    return BAD_VALUE;
2380                }
2381            }
2382            sp<DeviceDescriptor> srcDeviceDesc =
2383                    mAvailableInputDevices.getDeviceFromId(patch->sources[0].id);
2384            if (srcDeviceDesc == 0) {
2385                return BAD_VALUE;
2386            }
2387
2388            //update source and sink with our own data as the data passed in the patch may
2389            // be incomplete.
2390            struct audio_patch newPatch = *patch;
2391            srcDeviceDesc->toAudioPortConfig(&newPatch.sources[0], &patch->sources[0]);
2392
2393            for (size_t i = 0; i < patch->num_sinks; i++) {
2394                if (patch->sinks[i].type != AUDIO_PORT_TYPE_DEVICE) {
2395                    ALOGV("createAudioPatch() source device but one sink is not a device");
2396                    return INVALID_OPERATION;
2397                }
2398
2399                sp<DeviceDescriptor> sinkDeviceDesc =
2400                        mAvailableOutputDevices.getDeviceFromId(patch->sinks[i].id);
2401                if (sinkDeviceDesc == 0) {
2402                    return BAD_VALUE;
2403                }
2404                sinkDeviceDesc->toAudioPortConfig(&newPatch.sinks[i], &patch->sinks[i]);
2405
2406                if (srcDeviceDesc->mModule != sinkDeviceDesc->mModule) {
2407                    // only one sink supported when connected devices across HW modules
2408                    if (patch->num_sinks > 1) {
2409                        return INVALID_OPERATION;
2410                    }
2411                    SortedVector<audio_io_handle_t> outputs =
2412                                            getOutputsForDevice(sinkDeviceDesc->mDeviceType,
2413                                                                mOutputs);
2414                    // if the sink device is reachable via an opened output stream, request to go via
2415                    // this output stream by adding a second source to the patch description
2416                    audio_io_handle_t output = selectOutput(outputs,
2417                                                            AUDIO_OUTPUT_FLAG_NONE,
2418                                                            AUDIO_FORMAT_INVALID);
2419                    if (output != AUDIO_IO_HANDLE_NONE) {
2420                        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
2421                        if (outputDesc->isDuplicated()) {
2422                            return INVALID_OPERATION;
2423                        }
2424                        outputDesc->toAudioPortConfig(&newPatch.sources[1], &patch->sources[0]);
2425                        newPatch.num_sources = 2;
2426                    }
2427                }
2428            }
2429            // TODO: check from routing capabilities in config file and other conflicting patches
2430
2431            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
2432            if (index >= 0) {
2433                afPatchHandle = patchDesc->mAfPatchHandle;
2434            }
2435
2436            status_t status = mpClientInterface->createAudioPatch(&newPatch,
2437                                                                  &afPatchHandle,
2438                                                                  0);
2439            ALOGV("createAudioPatch() patch panel returned %d patchHandle %d",
2440                                                                  status, afPatchHandle);
2441            if (status == NO_ERROR) {
2442                if (index < 0) {
2443                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
2444                                               &newPatch, uid);
2445                    addAudioPatch(patchDesc->mHandle, patchDesc);
2446                } else {
2447                    patchDesc->mPatch = newPatch;
2448                }
2449                patchDesc->mAfPatchHandle = afPatchHandle;
2450                *handle = patchDesc->mHandle;
2451                nextAudioPortGeneration();
2452                mpClientInterface->onAudioPatchListUpdate();
2453            } else {
2454                ALOGW("createAudioPatch() patch panel could not connect device patch, error %d",
2455                status);
2456                return INVALID_OPERATION;
2457            }
2458        } else {
2459            return BAD_VALUE;
2460        }
2461    } else {
2462        return BAD_VALUE;
2463    }
2464    return NO_ERROR;
2465}
2466
2467status_t AudioPolicyManager::releaseAudioPatch(audio_patch_handle_t handle,
2468                                                  uid_t uid)
2469{
2470    ALOGV("releaseAudioPatch() patch %d", handle);
2471
2472    ssize_t index = mAudioPatches.indexOfKey(handle);
2473
2474    if (index < 0) {
2475        return BAD_VALUE;
2476    }
2477    sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
2478    ALOGV("releaseAudioPatch() mUidCached %d patchDesc->mUid %d uid %d",
2479          mUidCached, patchDesc->mUid, uid);
2480    if (patchDesc->mUid != mUidCached && uid != patchDesc->mUid) {
2481        return INVALID_OPERATION;
2482    }
2483
2484    struct audio_patch *patch = &patchDesc->mPatch;
2485    patchDesc->mUid = mUidCached;
2486    if (patch->sources[0].type == AUDIO_PORT_TYPE_MIX) {
2487        sp<AudioOutputDescriptor> outputDesc = getOutputFromId(patch->sources[0].id);
2488        if (outputDesc == NULL) {
2489            ALOGV("releaseAudioPatch() output not found for id %d", patch->sources[0].id);
2490            return BAD_VALUE;
2491        }
2492
2493        setOutputDevice(outputDesc->mIoHandle,
2494                        getNewOutputDevice(outputDesc->mIoHandle, true /*fromCache*/),
2495                       true,
2496                       0,
2497                       NULL);
2498    } else if (patch->sources[0].type == AUDIO_PORT_TYPE_DEVICE) {
2499        if (patch->sinks[0].type == AUDIO_PORT_TYPE_MIX) {
2500            sp<AudioInputDescriptor> inputDesc = getInputFromId(patch->sinks[0].id);
2501            if (inputDesc == NULL) {
2502                ALOGV("releaseAudioPatch() input not found for id %d", patch->sinks[0].id);
2503                return BAD_VALUE;
2504            }
2505            setInputDevice(inputDesc->mIoHandle,
2506                           getNewInputDevice(inputDesc->mIoHandle),
2507                           true,
2508                           NULL);
2509        } else if (patch->sinks[0].type == AUDIO_PORT_TYPE_DEVICE) {
2510            audio_patch_handle_t afPatchHandle = patchDesc->mAfPatchHandle;
2511            status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
2512            ALOGV("releaseAudioPatch() patch panel returned %d patchHandle %d",
2513                                                              status, patchDesc->mAfPatchHandle);
2514            removeAudioPatch(patchDesc->mHandle);
2515            nextAudioPortGeneration();
2516            mpClientInterface->onAudioPatchListUpdate();
2517        } else {
2518            return BAD_VALUE;
2519        }
2520    } else {
2521        return BAD_VALUE;
2522    }
2523    return NO_ERROR;
2524}
2525
2526status_t AudioPolicyManager::listAudioPatches(unsigned int *num_patches,
2527                                              struct audio_patch *patches,
2528                                              unsigned int *generation)
2529{
2530    if (num_patches == NULL || (*num_patches != 0 && patches == NULL) ||
2531            generation == NULL) {
2532        return BAD_VALUE;
2533    }
2534    ALOGV("listAudioPatches() num_patches %d patches %p available patches %zu",
2535          *num_patches, patches, mAudioPatches.size());
2536    if (patches == NULL) {
2537        *num_patches = 0;
2538    }
2539
2540    size_t patchesWritten = 0;
2541    size_t patchesMax = *num_patches;
2542    for (size_t i = 0;
2543            i  < mAudioPatches.size() && patchesWritten < patchesMax; i++) {
2544        patches[patchesWritten] = mAudioPatches[i]->mPatch;
2545        patches[patchesWritten++].id = mAudioPatches[i]->mHandle;
2546        ALOGV("listAudioPatches() patch %zu num_sources %d num_sinks %d",
2547              i, mAudioPatches[i]->mPatch.num_sources, mAudioPatches[i]->mPatch.num_sinks);
2548    }
2549    *num_patches = mAudioPatches.size();
2550
2551    *generation = curAudioPortGeneration();
2552    ALOGV("listAudioPatches() got %zu patches needed %d", patchesWritten, *num_patches);
2553    return NO_ERROR;
2554}
2555
2556status_t AudioPolicyManager::setAudioPortConfig(const struct audio_port_config *config)
2557{
2558    ALOGV("setAudioPortConfig()");
2559
2560    if (config == NULL) {
2561        return BAD_VALUE;
2562    }
2563    ALOGV("setAudioPortConfig() on port handle %d", config->id);
2564    // Only support gain configuration for now
2565    if (config->config_mask != AUDIO_PORT_CONFIG_GAIN) {
2566        return INVALID_OPERATION;
2567    }
2568
2569    sp<AudioPortConfig> audioPortConfig;
2570    if (config->type == AUDIO_PORT_TYPE_MIX) {
2571        if (config->role == AUDIO_PORT_ROLE_SOURCE) {
2572            sp<AudioOutputDescriptor> outputDesc = getOutputFromId(config->id);
2573            if (outputDesc == NULL) {
2574                return BAD_VALUE;
2575            }
2576            ALOG_ASSERT(!outputDesc->isDuplicated(),
2577                        "setAudioPortConfig() called on duplicated output %d",
2578                        outputDesc->mIoHandle);
2579            audioPortConfig = outputDesc;
2580        } else if (config->role == AUDIO_PORT_ROLE_SINK) {
2581            sp<AudioInputDescriptor> inputDesc = getInputFromId(config->id);
2582            if (inputDesc == NULL) {
2583                return BAD_VALUE;
2584            }
2585            audioPortConfig = inputDesc;
2586        } else {
2587            return BAD_VALUE;
2588        }
2589    } else if (config->type == AUDIO_PORT_TYPE_DEVICE) {
2590        sp<DeviceDescriptor> deviceDesc;
2591        if (config->role == AUDIO_PORT_ROLE_SOURCE) {
2592            deviceDesc = mAvailableInputDevices.getDeviceFromId(config->id);
2593        } else if (config->role == AUDIO_PORT_ROLE_SINK) {
2594            deviceDesc = mAvailableOutputDevices.getDeviceFromId(config->id);
2595        } else {
2596            return BAD_VALUE;
2597        }
2598        if (deviceDesc == NULL) {
2599            return BAD_VALUE;
2600        }
2601        audioPortConfig = deviceDesc;
2602    } else {
2603        return BAD_VALUE;
2604    }
2605
2606    struct audio_port_config backupConfig;
2607    status_t status = audioPortConfig->applyAudioPortConfig(config, &backupConfig);
2608    if (status == NO_ERROR) {
2609        struct audio_port_config newConfig;
2610        audioPortConfig->toAudioPortConfig(&newConfig, config);
2611        status = mpClientInterface->setAudioPortConfig(&newConfig, 0);
2612    }
2613    if (status != NO_ERROR) {
2614        audioPortConfig->applyAudioPortConfig(&backupConfig);
2615    }
2616
2617    return status;
2618}
2619
2620void AudioPolicyManager::clearAudioPatches(uid_t uid)
2621{
2622    for (ssize_t i = 0; i < (ssize_t)mAudioPatches.size(); i++)  {
2623        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(i);
2624        if (patchDesc->mUid == uid) {
2625            // releaseAudioPatch() removes the patch from mAudioPatches
2626            if (releaseAudioPatch(mAudioPatches.keyAt(i), uid) == NO_ERROR) {
2627                i--;
2628            }
2629        }
2630    }
2631}
2632
2633status_t AudioPolicyManager::acquireSoundTriggerSession(audio_session_t *session,
2634                                       audio_io_handle_t *ioHandle,
2635                                       audio_devices_t *device)
2636{
2637    *session = (audio_session_t)mpClientInterface->newAudioUniqueId();
2638    *ioHandle = (audio_io_handle_t)mpClientInterface->newAudioUniqueId();
2639    *device = getDeviceForInputSource(AUDIO_SOURCE_HOTWORD);
2640
2641    mSoundTriggerSessions.add(*session, *ioHandle);
2642
2643    return NO_ERROR;
2644}
2645
2646status_t AudioPolicyManager::releaseSoundTriggerSession(audio_session_t session)
2647{
2648    ssize_t index = mSoundTriggerSessions.indexOfKey(session);
2649    if (index < 0) {
2650        ALOGW("acquireSoundTriggerSession() session %d not registered", session);
2651        return BAD_VALUE;
2652    }
2653
2654    mSoundTriggerSessions.removeItem(session);
2655    return NO_ERROR;
2656}
2657
2658status_t AudioPolicyManager::addAudioPatch(audio_patch_handle_t handle,
2659                                           const sp<AudioPatch>& patch)
2660{
2661    ssize_t index = mAudioPatches.indexOfKey(handle);
2662
2663    if (index >= 0) {
2664        ALOGW("addAudioPatch() patch %d already in", handle);
2665        return ALREADY_EXISTS;
2666    }
2667    mAudioPatches.add(handle, patch);
2668    ALOGV("addAudioPatch() handle %d af handle %d num_sources %d num_sinks %d source handle %d"
2669            "sink handle %d",
2670          handle, patch->mAfPatchHandle, patch->mPatch.num_sources, patch->mPatch.num_sinks,
2671          patch->mPatch.sources[0].id, patch->mPatch.sinks[0].id);
2672    return NO_ERROR;
2673}
2674
2675status_t AudioPolicyManager::removeAudioPatch(audio_patch_handle_t handle)
2676{
2677    ssize_t index = mAudioPatches.indexOfKey(handle);
2678
2679    if (index < 0) {
2680        ALOGW("removeAudioPatch() patch %d not in", handle);
2681        return ALREADY_EXISTS;
2682    }
2683    ALOGV("removeAudioPatch() handle %d af handle %d", handle,
2684                      mAudioPatches.valueAt(index)->mAfPatchHandle);
2685    mAudioPatches.removeItemsAt(index);
2686    return NO_ERROR;
2687}
2688
2689// ----------------------------------------------------------------------------
2690// AudioPolicyManager
2691// ----------------------------------------------------------------------------
2692
2693uint32_t AudioPolicyManager::nextUniqueId()
2694{
2695    return android_atomic_inc(&mNextUniqueId);
2696}
2697
2698uint32_t AudioPolicyManager::nextAudioPortGeneration()
2699{
2700    return android_atomic_inc(&mAudioPortGeneration);
2701}
2702
2703AudioPolicyManager::AudioPolicyManager(AudioPolicyClientInterface *clientInterface)
2704    :
2705#ifdef AUDIO_POLICY_TEST
2706    Thread(false),
2707#endif //AUDIO_POLICY_TEST
2708    mPrimaryOutput((audio_io_handle_t)0),
2709    mPhoneState(AUDIO_MODE_NORMAL),
2710    mLimitRingtoneVolume(false), mLastVoiceVolume(-1.0f),
2711    mTotalEffectsCpuLoad(0), mTotalEffectsMemory(0),
2712    mA2dpSuspended(false),
2713    mSpeakerDrcEnabled(false), mNextUniqueId(1),
2714    mAudioPortGeneration(1),
2715    mBeaconMuteRefCount(0),
2716    mBeaconPlayingRefCount(0),
2717    mBeaconMuted(false)
2718{
2719    mUidCached = getuid();
2720    mpClientInterface = clientInterface;
2721
2722    for (int i = 0; i < AUDIO_POLICY_FORCE_USE_CNT; i++) {
2723        mForceUse[i] = AUDIO_POLICY_FORCE_NONE;
2724    }
2725
2726    mDefaultOutputDevice = new DeviceDescriptor(String8(""), AUDIO_DEVICE_OUT_SPEAKER);
2727    if (loadAudioPolicyConfig(AUDIO_POLICY_VENDOR_CONFIG_FILE) != NO_ERROR) {
2728        if (loadAudioPolicyConfig(AUDIO_POLICY_CONFIG_FILE) != NO_ERROR) {
2729            ALOGE("could not load audio policy configuration file, setting defaults");
2730            defaultAudioPolicyConfig();
2731        }
2732    }
2733    // mAvailableOutputDevices and mAvailableInputDevices now contain all attached devices
2734
2735    // must be done after reading the policy
2736    initializeVolumeCurves();
2737
2738    // open all output streams needed to access attached devices
2739    audio_devices_t outputDeviceTypes = mAvailableOutputDevices.types();
2740    audio_devices_t inputDeviceTypes = mAvailableInputDevices.types() & ~AUDIO_DEVICE_BIT_IN;
2741    for (size_t i = 0; i < mHwModules.size(); i++) {
2742        mHwModules[i]->mHandle = mpClientInterface->loadHwModule(mHwModules[i]->mName);
2743        if (mHwModules[i]->mHandle == 0) {
2744            ALOGW("could not open HW module %s", mHwModules[i]->mName);
2745            continue;
2746        }
2747        // open all output streams needed to access attached devices
2748        // except for direct output streams that are only opened when they are actually
2749        // required by an app.
2750        // This also validates mAvailableOutputDevices list
2751        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
2752        {
2753            const sp<IOProfile> outProfile = mHwModules[i]->mOutputProfiles[j];
2754
2755            if (outProfile->mSupportedDevices.isEmpty()) {
2756                ALOGW("Output profile contains no device on module %s", mHwModules[i]->mName);
2757                continue;
2758            }
2759
2760            if ((outProfile->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) != 0) {
2761                continue;
2762            }
2763            audio_devices_t profileType = outProfile->mSupportedDevices.types();
2764            if ((profileType & mDefaultOutputDevice->mDeviceType) != AUDIO_DEVICE_NONE) {
2765                profileType = mDefaultOutputDevice->mDeviceType;
2766            } else {
2767                // chose first device present in mSupportedDevices also part of
2768                // outputDeviceTypes
2769                for (size_t k = 0; k  < outProfile->mSupportedDevices.size(); k++) {
2770                    profileType = outProfile->mSupportedDevices[k]->mDeviceType;
2771                    if ((profileType & outputDeviceTypes) != 0) {
2772                        break;
2773                    }
2774                }
2775            }
2776            if ((profileType & outputDeviceTypes) == 0) {
2777                continue;
2778            }
2779            sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(outProfile);
2780
2781            outputDesc->mDevice = profileType;
2782            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
2783            config.sample_rate = outputDesc->mSamplingRate;
2784            config.channel_mask = outputDesc->mChannelMask;
2785            config.format = outputDesc->mFormat;
2786            audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
2787            status_t status = mpClientInterface->openOutput(outProfile->mModule->mHandle,
2788                                                            &output,
2789                                                            &config,
2790                                                            &outputDesc->mDevice,
2791                                                            String8(""),
2792                                                            &outputDesc->mLatency,
2793                                                            outputDesc->mFlags);
2794
2795            if (status != NO_ERROR) {
2796                ALOGW("Cannot open output stream for device %08x on hw module %s",
2797                      outputDesc->mDevice,
2798                      mHwModules[i]->mName);
2799            } else {
2800                outputDesc->mSamplingRate = config.sample_rate;
2801                outputDesc->mChannelMask = config.channel_mask;
2802                outputDesc->mFormat = config.format;
2803
2804                for (size_t k = 0; k  < outProfile->mSupportedDevices.size(); k++) {
2805                    audio_devices_t type = outProfile->mSupportedDevices[k]->mDeviceType;
2806                    ssize_t index =
2807                            mAvailableOutputDevices.indexOf(outProfile->mSupportedDevices[k]);
2808                    // give a valid ID to an attached device once confirmed it is reachable
2809                    if ((index >= 0) && (mAvailableOutputDevices[index]->mId == 0)) {
2810                        mAvailableOutputDevices[index]->mId = nextUniqueId();
2811                        mAvailableOutputDevices[index]->mModule = mHwModules[i];
2812                    }
2813                }
2814                if (mPrimaryOutput == 0 &&
2815                        outProfile->mFlags & AUDIO_OUTPUT_FLAG_PRIMARY) {
2816                    mPrimaryOutput = output;
2817                }
2818                addOutput(output, outputDesc);
2819                setOutputDevice(output,
2820                                outputDesc->mDevice,
2821                                true);
2822            }
2823        }
2824        // open input streams needed to access attached devices to validate
2825        // mAvailableInputDevices list
2826        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
2827        {
2828            const sp<IOProfile> inProfile = mHwModules[i]->mInputProfiles[j];
2829
2830            if (inProfile->mSupportedDevices.isEmpty()) {
2831                ALOGW("Input profile contains no device on module %s", mHwModules[i]->mName);
2832                continue;
2833            }
2834            // chose first device present in mSupportedDevices also part of
2835            // inputDeviceTypes
2836            audio_devices_t profileType = AUDIO_DEVICE_NONE;
2837            for (size_t k = 0; k  < inProfile->mSupportedDevices.size(); k++) {
2838                profileType = inProfile->mSupportedDevices[k]->mDeviceType;
2839                if (profileType & inputDeviceTypes) {
2840                    break;
2841                }
2842            }
2843            if ((profileType & inputDeviceTypes) == 0) {
2844                continue;
2845            }
2846            sp<AudioInputDescriptor> inputDesc = new AudioInputDescriptor(inProfile);
2847
2848            inputDesc->mInputSource = AUDIO_SOURCE_MIC;
2849            inputDesc->mDevice = profileType;
2850
2851            // find the address
2852            DeviceVector inputDevices = mAvailableInputDevices.getDevicesFromType(profileType);
2853            //   the inputs vector must be of size 1, but we don't want to crash here
2854            String8 address = inputDevices.size() > 0 ? inputDevices.itemAt(0)->mAddress
2855                    : String8("");
2856            ALOGV("  for input device 0x%x using address %s", profileType, address.string());
2857            ALOGE_IF(inputDevices.size() == 0, "Input device list is empty!");
2858
2859            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
2860            config.sample_rate = inputDesc->mSamplingRate;
2861            config.channel_mask = inputDesc->mChannelMask;
2862            config.format = inputDesc->mFormat;
2863            audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
2864            status_t status = mpClientInterface->openInput(inProfile->mModule->mHandle,
2865                                                           &input,
2866                                                           &config,
2867                                                           &inputDesc->mDevice,
2868                                                           address,
2869                                                           AUDIO_SOURCE_MIC,
2870                                                           AUDIO_INPUT_FLAG_NONE);
2871
2872            if (status == NO_ERROR) {
2873                for (size_t k = 0; k  < inProfile->mSupportedDevices.size(); k++) {
2874                    audio_devices_t type = inProfile->mSupportedDevices[k]->mDeviceType;
2875                    ssize_t index =
2876                            mAvailableInputDevices.indexOf(inProfile->mSupportedDevices[k]);
2877                    // give a valid ID to an attached device once confirmed it is reachable
2878                    if ((index >= 0) && (mAvailableInputDevices[index]->mId == 0)) {
2879                        mAvailableInputDevices[index]->mId = nextUniqueId();
2880                        mAvailableInputDevices[index]->mModule = mHwModules[i];
2881                    }
2882                }
2883                mpClientInterface->closeInput(input);
2884            } else {
2885                ALOGW("Cannot open input stream for device %08x on hw module %s",
2886                      inputDesc->mDevice,
2887                      mHwModules[i]->mName);
2888            }
2889        }
2890    }
2891    // make sure all attached devices have been allocated a unique ID
2892    for (size_t i = 0; i  < mAvailableOutputDevices.size();) {
2893        if (mAvailableOutputDevices[i]->mId == 0) {
2894            ALOGW("Input device %08x unreachable", mAvailableOutputDevices[i]->mDeviceType);
2895            mAvailableOutputDevices.remove(mAvailableOutputDevices[i]);
2896            continue;
2897        }
2898        i++;
2899    }
2900    for (size_t i = 0; i  < mAvailableInputDevices.size();) {
2901        if (mAvailableInputDevices[i]->mId == 0) {
2902            ALOGW("Input device %08x unreachable", mAvailableInputDevices[i]->mDeviceType);
2903            mAvailableInputDevices.remove(mAvailableInputDevices[i]);
2904            continue;
2905        }
2906        i++;
2907    }
2908    // make sure default device is reachable
2909    if (mAvailableOutputDevices.indexOf(mDefaultOutputDevice) < 0) {
2910        ALOGE("Default device %08x is unreachable", mDefaultOutputDevice->mDeviceType);
2911    }
2912
2913    ALOGE_IF((mPrimaryOutput == 0), "Failed to open primary output");
2914
2915    updateDevicesAndOutputs();
2916
2917#ifdef AUDIO_POLICY_TEST
2918    if (mPrimaryOutput != 0) {
2919        AudioParameter outputCmd = AudioParameter();
2920        outputCmd.addInt(String8("set_id"), 0);
2921        mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
2922
2923        mTestDevice = AUDIO_DEVICE_OUT_SPEAKER;
2924        mTestSamplingRate = 44100;
2925        mTestFormat = AUDIO_FORMAT_PCM_16_BIT;
2926        mTestChannels =  AUDIO_CHANNEL_OUT_STEREO;
2927        mTestLatencyMs = 0;
2928        mCurOutput = 0;
2929        mDirectOutput = false;
2930        for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
2931            mTestOutputs[i] = 0;
2932        }
2933
2934        const size_t SIZE = 256;
2935        char buffer[SIZE];
2936        snprintf(buffer, SIZE, "AudioPolicyManagerTest");
2937        run(buffer, ANDROID_PRIORITY_AUDIO);
2938    }
2939#endif //AUDIO_POLICY_TEST
2940}
2941
2942AudioPolicyManager::~AudioPolicyManager()
2943{
2944#ifdef AUDIO_POLICY_TEST
2945    exit();
2946#endif //AUDIO_POLICY_TEST
2947   for (size_t i = 0; i < mOutputs.size(); i++) {
2948        mpClientInterface->closeOutput(mOutputs.keyAt(i));
2949   }
2950   for (size_t i = 0; i < mInputs.size(); i++) {
2951        mpClientInterface->closeInput(mInputs.keyAt(i));
2952   }
2953   mAvailableOutputDevices.clear();
2954   mAvailableInputDevices.clear();
2955   mOutputs.clear();
2956   mInputs.clear();
2957   mHwModules.clear();
2958}
2959
2960status_t AudioPolicyManager::initCheck()
2961{
2962    return (mPrimaryOutput == 0) ? NO_INIT : NO_ERROR;
2963}
2964
2965#ifdef AUDIO_POLICY_TEST
2966bool AudioPolicyManager::threadLoop()
2967{
2968    ALOGV("entering threadLoop()");
2969    while (!exitPending())
2970    {
2971        String8 command;
2972        int valueInt;
2973        String8 value;
2974
2975        Mutex::Autolock _l(mLock);
2976        mWaitWorkCV.waitRelative(mLock, milliseconds(50));
2977
2978        command = mpClientInterface->getParameters(0, String8("test_cmd_policy"));
2979        AudioParameter param = AudioParameter(command);
2980
2981        if (param.getInt(String8("test_cmd_policy"), valueInt) == NO_ERROR &&
2982            valueInt != 0) {
2983            ALOGV("Test command %s received", command.string());
2984            String8 target;
2985            if (param.get(String8("target"), target) != NO_ERROR) {
2986                target = "Manager";
2987            }
2988            if (param.getInt(String8("test_cmd_policy_output"), valueInt) == NO_ERROR) {
2989                param.remove(String8("test_cmd_policy_output"));
2990                mCurOutput = valueInt;
2991            }
2992            if (param.get(String8("test_cmd_policy_direct"), value) == NO_ERROR) {
2993                param.remove(String8("test_cmd_policy_direct"));
2994                if (value == "false") {
2995                    mDirectOutput = false;
2996                } else if (value == "true") {
2997                    mDirectOutput = true;
2998                }
2999            }
3000            if (param.getInt(String8("test_cmd_policy_input"), valueInt) == NO_ERROR) {
3001                param.remove(String8("test_cmd_policy_input"));
3002                mTestInput = valueInt;
3003            }
3004
3005            if (param.get(String8("test_cmd_policy_format"), value) == NO_ERROR) {
3006                param.remove(String8("test_cmd_policy_format"));
3007                int format = AUDIO_FORMAT_INVALID;
3008                if (value == "PCM 16 bits") {
3009                    format = AUDIO_FORMAT_PCM_16_BIT;
3010                } else if (value == "PCM 8 bits") {
3011                    format = AUDIO_FORMAT_PCM_8_BIT;
3012                } else if (value == "Compressed MP3") {
3013                    format = AUDIO_FORMAT_MP3;
3014                }
3015                if (format != AUDIO_FORMAT_INVALID) {
3016                    if (target == "Manager") {
3017                        mTestFormat = format;
3018                    } else if (mTestOutputs[mCurOutput] != 0) {
3019                        AudioParameter outputParam = AudioParameter();
3020                        outputParam.addInt(String8("format"), format);
3021                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
3022                    }
3023                }
3024            }
3025            if (param.get(String8("test_cmd_policy_channels"), value) == NO_ERROR) {
3026                param.remove(String8("test_cmd_policy_channels"));
3027                int channels = 0;
3028
3029                if (value == "Channels Stereo") {
3030                    channels =  AUDIO_CHANNEL_OUT_STEREO;
3031                } else if (value == "Channels Mono") {
3032                    channels =  AUDIO_CHANNEL_OUT_MONO;
3033                }
3034                if (channels != 0) {
3035                    if (target == "Manager") {
3036                        mTestChannels = channels;
3037                    } else if (mTestOutputs[mCurOutput] != 0) {
3038                        AudioParameter outputParam = AudioParameter();
3039                        outputParam.addInt(String8("channels"), channels);
3040                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
3041                    }
3042                }
3043            }
3044            if (param.getInt(String8("test_cmd_policy_sampleRate"), valueInt) == NO_ERROR) {
3045                param.remove(String8("test_cmd_policy_sampleRate"));
3046                if (valueInt >= 0 && valueInt <= 96000) {
3047                    int samplingRate = valueInt;
3048                    if (target == "Manager") {
3049                        mTestSamplingRate = samplingRate;
3050                    } else if (mTestOutputs[mCurOutput] != 0) {
3051                        AudioParameter outputParam = AudioParameter();
3052                        outputParam.addInt(String8("sampling_rate"), samplingRate);
3053                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
3054                    }
3055                }
3056            }
3057
3058            if (param.get(String8("test_cmd_policy_reopen"), value) == NO_ERROR) {
3059                param.remove(String8("test_cmd_policy_reopen"));
3060
3061                sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
3062                mpClientInterface->closeOutput(mPrimaryOutput);
3063
3064                audio_module_handle_t moduleHandle = outputDesc->mModule->mHandle;
3065
3066                mOutputs.removeItem(mPrimaryOutput);
3067
3068                sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(NULL);
3069                outputDesc->mDevice = AUDIO_DEVICE_OUT_SPEAKER;
3070                audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3071                config.sample_rate = outputDesc->mSamplingRate;
3072                config.channel_mask = outputDesc->mChannelMask;
3073                config.format = outputDesc->mFormat;
3074                status_t status = mpClientInterface->openOutput(moduleHandle,
3075                                                                &mPrimaryOutput,
3076                                                                &config,
3077                                                                &outputDesc->mDevice,
3078                                                                String8(""),
3079                                                                &outputDesc->mLatency,
3080                                                                outputDesc->mFlags);
3081                if (status != NO_ERROR) {
3082                    ALOGE("Failed to reopen hardware output stream, "
3083                        "samplingRate: %d, format %d, channels %d",
3084                        outputDesc->mSamplingRate, outputDesc->mFormat, outputDesc->mChannelMask);
3085                } else {
3086                    outputDesc->mSamplingRate = config.sample_rate;
3087                    outputDesc->mChannelMask = config.channel_mask;
3088                    outputDesc->mFormat = config.format;
3089                    AudioParameter outputCmd = AudioParameter();
3090                    outputCmd.addInt(String8("set_id"), 0);
3091                    mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
3092                    addOutput(mPrimaryOutput, outputDesc);
3093                }
3094            }
3095
3096
3097            mpClientInterface->setParameters(0, String8("test_cmd_policy="));
3098        }
3099    }
3100    return false;
3101}
3102
3103void AudioPolicyManager::exit()
3104{
3105    {
3106        AutoMutex _l(mLock);
3107        requestExit();
3108        mWaitWorkCV.signal();
3109    }
3110    requestExitAndWait();
3111}
3112
3113int AudioPolicyManager::testOutputIndex(audio_io_handle_t output)
3114{
3115    for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
3116        if (output == mTestOutputs[i]) return i;
3117    }
3118    return 0;
3119}
3120#endif //AUDIO_POLICY_TEST
3121
3122// ---
3123
3124void AudioPolicyManager::addOutput(audio_io_handle_t output, sp<AudioOutputDescriptor> outputDesc)
3125{
3126    outputDesc->mIoHandle = output;
3127    outputDesc->mId = nextUniqueId();
3128    mOutputs.add(output, outputDesc);
3129    nextAudioPortGeneration();
3130}
3131
3132void AudioPolicyManager::addInput(audio_io_handle_t input, sp<AudioInputDescriptor> inputDesc)
3133{
3134    inputDesc->mIoHandle = input;
3135    inputDesc->mId = nextUniqueId();
3136    mInputs.add(input, inputDesc);
3137    nextAudioPortGeneration();
3138}
3139
3140void AudioPolicyManager::findIoHandlesByAddress(sp<AudioOutputDescriptor> desc /*in*/,
3141        const String8 address /*in*/,
3142        SortedVector<audio_io_handle_t>& outputs /*out*/) {
3143    // look for a match on the given address on the addresses of the outputs:
3144    // find the address by finding the patch that maps to this output
3145    ssize_t patchIdx = mAudioPatches.indexOfKey(desc->mPatchHandle);
3146    //ALOGV("    inspecting output %d (patch %d) for supported device=0x%x",
3147    //        outputIdx, patchIdx,  desc->mProfile->mSupportedDevices.types());
3148    if (patchIdx >= 0) {
3149        const sp<AudioPatch> patchDesc = mAudioPatches.valueAt(patchIdx);
3150        const int numSinks = patchDesc->mPatch.num_sinks;
3151        for (ssize_t j=0; j < numSinks; j++) {
3152            if (patchDesc->mPatch.sinks[j].type == AUDIO_PORT_TYPE_DEVICE) {
3153                const char* patchAddr =
3154                        patchDesc->mPatch.sinks[j].ext.device.address;
3155                if (strncmp(patchAddr,
3156                        address.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN) == 0) {
3157                    ALOGV("findIoHandlesByAddress(): adding opened output %d on same address %s",
3158                            desc->mIoHandle,  patchDesc->mPatch.sinks[j].ext.device.address);
3159                    outputs.add(desc->mIoHandle);
3160                    break;
3161                }
3162            }
3163        }
3164    }
3165}
3166
3167status_t AudioPolicyManager::checkOutputsForDevice(const sp<DeviceDescriptor> devDesc,
3168                                                       audio_policy_dev_state_t state,
3169                                                       SortedVector<audio_io_handle_t>& outputs,
3170                                                       const String8 address)
3171{
3172    audio_devices_t device = devDesc->mDeviceType;
3173    sp<AudioOutputDescriptor> desc;
3174    // erase all current sample rates, formats and channel masks
3175    devDesc->clearCapabilities();
3176
3177    if (state == AUDIO_POLICY_DEVICE_STATE_AVAILABLE) {
3178        // first list already open outputs that can be routed to this device
3179        for (size_t i = 0; i < mOutputs.size(); i++) {
3180            desc = mOutputs.valueAt(i);
3181            if (!desc->isDuplicated() && (desc->mProfile->mSupportedDevices.types() & device)) {
3182                if (!deviceDistinguishesOnAddress(device)) {
3183                    ALOGV("checkOutputsForDevice(): adding opened output %d", mOutputs.keyAt(i));
3184                    outputs.add(mOutputs.keyAt(i));
3185                } else {
3186                    ALOGV("  checking address match due to device 0x%x", device);
3187                    findIoHandlesByAddress(desc, address, outputs);
3188                }
3189            }
3190        }
3191        // then look for output profiles that can be routed to this device
3192        SortedVector< sp<IOProfile> > profiles;
3193        for (size_t i = 0; i < mHwModules.size(); i++)
3194        {
3195            if (mHwModules[i]->mHandle == 0) {
3196                continue;
3197            }
3198            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
3199            {
3200                if (mHwModules[i]->mOutputProfiles[j]->mSupportedDevices.types() & device) {
3201                    ALOGV("checkOutputsForDevice(): adding profile %zu from module %zu", j, i);
3202                    profiles.add(mHwModules[i]->mOutputProfiles[j]);
3203                }
3204            }
3205        }
3206
3207        ALOGV("  found %d profiles, %d outputs", profiles.size(), outputs.size());
3208
3209        if (profiles.isEmpty() && outputs.isEmpty()) {
3210            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
3211            return BAD_VALUE;
3212        }
3213
3214        // open outputs for matching profiles if needed. Direct outputs are also opened to
3215        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
3216        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
3217            sp<IOProfile> profile = profiles[profile_index];
3218
3219            // nothing to do if one output is already opened for this profile
3220            size_t j;
3221            for (j = 0; j < outputs.size(); j++) {
3222                desc = mOutputs.valueFor(outputs.itemAt(j));
3223                if (!desc->isDuplicated() && desc->mProfile == profile) {
3224                    // matching profile: save the sample rates, format and channel masks supported
3225                    // by the profile in our device descriptor
3226                    devDesc->importAudioPort(profile);
3227                    break;
3228                }
3229            }
3230            if (j != outputs.size()) {
3231                continue;
3232            }
3233
3234            ALOGV("opening output for device %08x with params %s profile %p",
3235                                                      device, address.string(), profile.get());
3236            desc = new AudioOutputDescriptor(profile);
3237            desc->mDevice = device;
3238            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3239            config.sample_rate = desc->mSamplingRate;
3240            config.channel_mask = desc->mChannelMask;
3241            config.format = desc->mFormat;
3242            config.offload_info.sample_rate = desc->mSamplingRate;
3243            config.offload_info.channel_mask = desc->mChannelMask;
3244            config.offload_info.format = desc->mFormat;
3245            audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
3246            status_t status = mpClientInterface->openOutput(profile->mModule->mHandle,
3247                                                            &output,
3248                                                            &config,
3249                                                            &desc->mDevice,
3250                                                            address,
3251                                                            &desc->mLatency,
3252                                                            desc->mFlags);
3253            if (status == NO_ERROR) {
3254                desc->mSamplingRate = config.sample_rate;
3255                desc->mChannelMask = config.channel_mask;
3256                desc->mFormat = config.format;
3257
3258                // Here is where the out_set_parameters() for card & device gets called
3259                if (!address.isEmpty()) {
3260                    char *param = audio_device_address_to_parameter(device, address);
3261                    mpClientInterface->setParameters(output, String8(param));
3262                    free(param);
3263                }
3264
3265                // Here is where we step through and resolve any "dynamic" fields
3266                String8 reply;
3267                char *value;
3268                if (profile->mSamplingRates[0] == 0) {
3269                    reply = mpClientInterface->getParameters(output,
3270                                            String8(AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES));
3271                    ALOGV("checkOutputsForDevice() supported sampling rates %s",
3272                              reply.string());
3273                    value = strpbrk((char *)reply.string(), "=");
3274                    if (value != NULL) {
3275                        profile->loadSamplingRates(value + 1);
3276                    }
3277                }
3278                if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3279                    reply = mpClientInterface->getParameters(output,
3280                                                   String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS));
3281                    ALOGV("checkOutputsForDevice() supported formats %s",
3282                              reply.string());
3283                    value = strpbrk((char *)reply.string(), "=");
3284                    if (value != NULL) {
3285                        profile->loadFormats(value + 1);
3286                    }
3287                }
3288                if (profile->mChannelMasks[0] == 0) {
3289                    reply = mpClientInterface->getParameters(output,
3290                                                  String8(AUDIO_PARAMETER_STREAM_SUP_CHANNELS));
3291                    ALOGV("checkOutputsForDevice() supported channel masks %s",
3292                              reply.string());
3293                    value = strpbrk((char *)reply.string(), "=");
3294                    if (value != NULL) {
3295                        profile->loadOutChannels(value + 1);
3296                    }
3297                }
3298                if (((profile->mSamplingRates[0] == 0) &&
3299                         (profile->mSamplingRates.size() < 2)) ||
3300                     ((profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) &&
3301                         (profile->mFormats.size() < 2)) ||
3302                     ((profile->mChannelMasks[0] == 0) &&
3303                         (profile->mChannelMasks.size() < 2))) {
3304                    ALOGW("checkOutputsForDevice() missing param");
3305                    mpClientInterface->closeOutput(output);
3306                    output = AUDIO_IO_HANDLE_NONE;
3307                } else if (profile->mSamplingRates[0] == 0 || profile->mFormats[0] == 0 ||
3308                            profile->mChannelMasks[0] == 0) {
3309                    mpClientInterface->closeOutput(output);
3310                    config.sample_rate = profile->pickSamplingRate();
3311                    config.channel_mask = profile->pickChannelMask();
3312                    config.format = profile->pickFormat();
3313                    config.offload_info.sample_rate = config.sample_rate;
3314                    config.offload_info.channel_mask = config.channel_mask;
3315                    config.offload_info.format = config.format;
3316                    status = mpClientInterface->openOutput(profile->mModule->mHandle,
3317                                                           &output,
3318                                                           &config,
3319                                                           &desc->mDevice,
3320                                                           address,
3321                                                           &desc->mLatency,
3322                                                           desc->mFlags);
3323                    if (status == NO_ERROR) {
3324                        desc->mSamplingRate = config.sample_rate;
3325                        desc->mChannelMask = config.channel_mask;
3326                        desc->mFormat = config.format;
3327                    } else {
3328                        output = AUDIO_IO_HANDLE_NONE;
3329                    }
3330                }
3331
3332                if (output != AUDIO_IO_HANDLE_NONE) {
3333                    addOutput(output, desc);
3334                    if ((desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) == 0) {
3335                        audio_io_handle_t duplicatedOutput = AUDIO_IO_HANDLE_NONE;
3336
3337                        // set initial stream volume for device
3338                        applyStreamVolumes(output, device, 0, true);
3339
3340                        //TODO: configure audio effect output stage here
3341
3342                        // open a duplicating output thread for the new output and the primary output
3343                        duplicatedOutput = mpClientInterface->openDuplicateOutput(output,
3344                                                                                  mPrimaryOutput);
3345                        if (duplicatedOutput != AUDIO_IO_HANDLE_NONE) {
3346                            // add duplicated output descriptor
3347                            sp<AudioOutputDescriptor> dupOutputDesc =
3348                                    new AudioOutputDescriptor(NULL);
3349                            dupOutputDesc->mOutput1 = mOutputs.valueFor(mPrimaryOutput);
3350                            dupOutputDesc->mOutput2 = mOutputs.valueFor(output);
3351                            dupOutputDesc->mSamplingRate = desc->mSamplingRate;
3352                            dupOutputDesc->mFormat = desc->mFormat;
3353                            dupOutputDesc->mChannelMask = desc->mChannelMask;
3354                            dupOutputDesc->mLatency = desc->mLatency;
3355                            addOutput(duplicatedOutput, dupOutputDesc);
3356                            applyStreamVolumes(duplicatedOutput, device, 0, true);
3357                        } else {
3358                            ALOGW("checkOutputsForDevice() could not open dup output for %d and %d",
3359                                    mPrimaryOutput, output);
3360                            mpClientInterface->closeOutput(output);
3361                            mOutputs.removeItem(output);
3362                            nextAudioPortGeneration();
3363                            output = AUDIO_IO_HANDLE_NONE;
3364                        }
3365                    }
3366                }
3367            } else {
3368                output = AUDIO_IO_HANDLE_NONE;
3369            }
3370            if (output == AUDIO_IO_HANDLE_NONE) {
3371                ALOGW("checkOutputsForDevice() could not open output for device %x", device);
3372                profiles.removeAt(profile_index);
3373                profile_index--;
3374            } else {
3375                outputs.add(output);
3376                devDesc->importAudioPort(profile);
3377
3378                if (deviceDistinguishesOnAddress(device)) {
3379                    ALOGV("checkOutputsForDevice(): setOutputDevice(dev=0x%x, addr=%s)",
3380                            device, address.string());
3381                    setOutputDevice(output, device, true/*force*/, 0/*delay*/,
3382                            NULL/*patch handle*/, address.string());
3383                }
3384                ALOGV("checkOutputsForDevice(): adding output %d", output);
3385            }
3386        }
3387
3388        if (profiles.isEmpty()) {
3389            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
3390            return BAD_VALUE;
3391        }
3392    } else { // Disconnect
3393        // check if one opened output is not needed any more after disconnecting one device
3394        for (size_t i = 0; i < mOutputs.size(); i++) {
3395            desc = mOutputs.valueAt(i);
3396            if (!desc->isDuplicated()) {
3397                if  (!(desc->mProfile->mSupportedDevices.types()
3398                        & mAvailableOutputDevices.types())) {
3399                    ALOGV("checkOutputsForDevice(): disconnecting adding output %d",
3400                            mOutputs.keyAt(i));
3401                    outputs.add(mOutputs.keyAt(i));
3402                } else if (deviceDistinguishesOnAddress(device) &&
3403                        // exact match on device
3404                        (desc->mProfile->mSupportedDevices.types() == device)) {
3405                    findIoHandlesByAddress(desc, address, outputs);
3406                }
3407            }
3408        }
3409        // Clear any profiles associated with the disconnected device.
3410        for (size_t i = 0; i < mHwModules.size(); i++)
3411        {
3412            if (mHwModules[i]->mHandle == 0) {
3413                continue;
3414            }
3415            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
3416            {
3417                sp<IOProfile> profile = mHwModules[i]->mOutputProfiles[j];
3418                if (profile->mSupportedDevices.types() & device) {
3419                    ALOGV("checkOutputsForDevice(): "
3420                            "clearing direct output profile %zu on module %zu", j, i);
3421                    if (profile->mSamplingRates[0] == 0) {
3422                        profile->mSamplingRates.clear();
3423                        profile->mSamplingRates.add(0);
3424                    }
3425                    if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3426                        profile->mFormats.clear();
3427                        profile->mFormats.add(AUDIO_FORMAT_DEFAULT);
3428                    }
3429                    if (profile->mChannelMasks[0] == 0) {
3430                        profile->mChannelMasks.clear();
3431                        profile->mChannelMasks.add(0);
3432                    }
3433                }
3434            }
3435        }
3436    }
3437    return NO_ERROR;
3438}
3439
3440status_t AudioPolicyManager::checkInputsForDevice(audio_devices_t device,
3441                                                      audio_policy_dev_state_t state,
3442                                                      SortedVector<audio_io_handle_t>& inputs,
3443                                                      const String8 address)
3444{
3445    sp<AudioInputDescriptor> desc;
3446    if (state == AUDIO_POLICY_DEVICE_STATE_AVAILABLE) {
3447        // first list already open inputs that can be routed to this device
3448        for (size_t input_index = 0; input_index < mInputs.size(); input_index++) {
3449            desc = mInputs.valueAt(input_index);
3450            if (desc->mProfile->mSupportedDevices.types() & (device & ~AUDIO_DEVICE_BIT_IN)) {
3451                ALOGV("checkInputsForDevice(): adding opened input %d", mInputs.keyAt(input_index));
3452               inputs.add(mInputs.keyAt(input_index));
3453            }
3454        }
3455
3456        // then look for input profiles that can be routed to this device
3457        SortedVector< sp<IOProfile> > profiles;
3458        for (size_t module_idx = 0; module_idx < mHwModules.size(); module_idx++)
3459        {
3460            if (mHwModules[module_idx]->mHandle == 0) {
3461                continue;
3462            }
3463            for (size_t profile_index = 0;
3464                 profile_index < mHwModules[module_idx]->mInputProfiles.size();
3465                 profile_index++)
3466            {
3467                if (mHwModules[module_idx]->mInputProfiles[profile_index]->mSupportedDevices.types()
3468                        & (device & ~AUDIO_DEVICE_BIT_IN)) {
3469                    ALOGV("checkInputsForDevice(): adding profile %zu from module %zu",
3470                          profile_index, module_idx);
3471                    profiles.add(mHwModules[module_idx]->mInputProfiles[profile_index]);
3472                }
3473            }
3474        }
3475
3476        if (profiles.isEmpty() && inputs.isEmpty()) {
3477            ALOGW("checkInputsForDevice(): No input available for device 0x%X", device);
3478            return BAD_VALUE;
3479        }
3480
3481        // open inputs for matching profiles if needed. Direct inputs are also opened to
3482        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
3483        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
3484
3485            sp<IOProfile> profile = profiles[profile_index];
3486            // nothing to do if one input is already opened for this profile
3487            size_t input_index;
3488            for (input_index = 0; input_index < mInputs.size(); input_index++) {
3489                desc = mInputs.valueAt(input_index);
3490                if (desc->mProfile == profile) {
3491                    break;
3492                }
3493            }
3494            if (input_index != mInputs.size()) {
3495                continue;
3496            }
3497
3498            ALOGV("opening input for device 0x%X with params %s", device, address.string());
3499            desc = new AudioInputDescriptor(profile);
3500            desc->mDevice = device;
3501            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3502            config.sample_rate = desc->mSamplingRate;
3503            config.channel_mask = desc->mChannelMask;
3504            config.format = desc->mFormat;
3505            audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
3506            status_t status = mpClientInterface->openInput(profile->mModule->mHandle,
3507                                                           &input,
3508                                                           &config,
3509                                                           &desc->mDevice,
3510                                                           address,
3511                                                           AUDIO_SOURCE_MIC,
3512                                                           AUDIO_INPUT_FLAG_NONE /*FIXME*/);
3513
3514            if (status == NO_ERROR) {
3515                desc->mSamplingRate = config.sample_rate;
3516                desc->mChannelMask = config.channel_mask;
3517                desc->mFormat = config.format;
3518
3519                if (!address.isEmpty()) {
3520                    char *param = audio_device_address_to_parameter(device, address);
3521                    mpClientInterface->setParameters(input, String8(param));
3522                    free(param);
3523                }
3524
3525                // Here is where we step through and resolve any "dynamic" fields
3526                String8 reply;
3527                char *value;
3528                if (profile->mSamplingRates[0] == 0) {
3529                    reply = mpClientInterface->getParameters(input,
3530                                            String8(AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES));
3531                    ALOGV("checkInputsForDevice() direct input sup sampling rates %s",
3532                              reply.string());
3533                    value = strpbrk((char *)reply.string(), "=");
3534                    if (value != NULL) {
3535                        profile->loadSamplingRates(value + 1);
3536                    }
3537                }
3538                if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3539                    reply = mpClientInterface->getParameters(input,
3540                                                   String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS));
3541                    ALOGV("checkInputsForDevice() direct input sup formats %s", reply.string());
3542                    value = strpbrk((char *)reply.string(), "=");
3543                    if (value != NULL) {
3544                        profile->loadFormats(value + 1);
3545                    }
3546                }
3547                if (profile->mChannelMasks[0] == 0) {
3548                    reply = mpClientInterface->getParameters(input,
3549                                                  String8(AUDIO_PARAMETER_STREAM_SUP_CHANNELS));
3550                    ALOGV("checkInputsForDevice() direct input sup channel masks %s",
3551                              reply.string());
3552                    value = strpbrk((char *)reply.string(), "=");
3553                    if (value != NULL) {
3554                        profile->loadInChannels(value + 1);
3555                    }
3556                }
3557                if (((profile->mSamplingRates[0] == 0) && (profile->mSamplingRates.size() < 2)) ||
3558                     ((profile->mFormats[0] == 0) && (profile->mFormats.size() < 2)) ||
3559                     ((profile->mChannelMasks[0] == 0) && (profile->mChannelMasks.size() < 2))) {
3560                    ALOGW("checkInputsForDevice() direct input missing param");
3561                    mpClientInterface->closeInput(input);
3562                    input = AUDIO_IO_HANDLE_NONE;
3563                }
3564
3565                if (input != 0) {
3566                    addInput(input, desc);
3567                }
3568            } // endif input != 0
3569
3570            if (input == AUDIO_IO_HANDLE_NONE) {
3571                ALOGW("checkInputsForDevice() could not open input for device 0x%X", device);
3572                profiles.removeAt(profile_index);
3573                profile_index--;
3574            } else {
3575                inputs.add(input);
3576                ALOGV("checkInputsForDevice(): adding input %d", input);
3577            }
3578        } // end scan profiles
3579
3580        if (profiles.isEmpty()) {
3581            ALOGW("checkInputsForDevice(): No input available for device 0x%X", device);
3582            return BAD_VALUE;
3583        }
3584    } else {
3585        // Disconnect
3586        // check if one opened input is not needed any more after disconnecting one device
3587        for (size_t input_index = 0; input_index < mInputs.size(); input_index++) {
3588            desc = mInputs.valueAt(input_index);
3589            if (!(desc->mProfile->mSupportedDevices.types() & mAvailableInputDevices.types() &
3590                    ~AUDIO_DEVICE_BIT_IN)) {
3591                ALOGV("checkInputsForDevice(): disconnecting adding input %d",
3592                      mInputs.keyAt(input_index));
3593                inputs.add(mInputs.keyAt(input_index));
3594            }
3595        }
3596        // Clear any profiles associated with the disconnected device.
3597        for (size_t module_index = 0; module_index < mHwModules.size(); module_index++) {
3598            if (mHwModules[module_index]->mHandle == 0) {
3599                continue;
3600            }
3601            for (size_t profile_index = 0;
3602                 profile_index < mHwModules[module_index]->mInputProfiles.size();
3603                 profile_index++) {
3604                sp<IOProfile> profile = mHwModules[module_index]->mInputProfiles[profile_index];
3605                if (profile->mSupportedDevices.types() & device & ~AUDIO_DEVICE_BIT_IN) {
3606                    ALOGV("checkInputsForDevice(): clearing direct input profile %zu on module %zu",
3607                          profile_index, module_index);
3608                    if (profile->mSamplingRates[0] == 0) {
3609                        profile->mSamplingRates.clear();
3610                        profile->mSamplingRates.add(0);
3611                    }
3612                    if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3613                        profile->mFormats.clear();
3614                        profile->mFormats.add(AUDIO_FORMAT_DEFAULT);
3615                    }
3616                    if (profile->mChannelMasks[0] == 0) {
3617                        profile->mChannelMasks.clear();
3618                        profile->mChannelMasks.add(0);
3619                    }
3620                }
3621            }
3622        }
3623    } // end disconnect
3624
3625    return NO_ERROR;
3626}
3627
3628
3629void AudioPolicyManager::closeOutput(audio_io_handle_t output)
3630{
3631    ALOGV("closeOutput(%d)", output);
3632
3633    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
3634    if (outputDesc == NULL) {
3635        ALOGW("closeOutput() unknown output %d", output);
3636        return;
3637    }
3638
3639    // look for duplicated outputs connected to the output being removed.
3640    for (size_t i = 0; i < mOutputs.size(); i++) {
3641        sp<AudioOutputDescriptor> dupOutputDesc = mOutputs.valueAt(i);
3642        if (dupOutputDesc->isDuplicated() &&
3643                (dupOutputDesc->mOutput1 == outputDesc ||
3644                dupOutputDesc->mOutput2 == outputDesc)) {
3645            sp<AudioOutputDescriptor> outputDesc2;
3646            if (dupOutputDesc->mOutput1 == outputDesc) {
3647                outputDesc2 = dupOutputDesc->mOutput2;
3648            } else {
3649                outputDesc2 = dupOutputDesc->mOutput1;
3650            }
3651            // As all active tracks on duplicated output will be deleted,
3652            // and as they were also referenced on the other output, the reference
3653            // count for their stream type must be adjusted accordingly on
3654            // the other output.
3655            for (int j = 0; j < AUDIO_STREAM_CNT; j++) {
3656                int refCount = dupOutputDesc->mRefCount[j];
3657                outputDesc2->changeRefCount((audio_stream_type_t)j,-refCount);
3658            }
3659            audio_io_handle_t duplicatedOutput = mOutputs.keyAt(i);
3660            ALOGV("closeOutput() closing also duplicated output %d", duplicatedOutput);
3661
3662            mpClientInterface->closeOutput(duplicatedOutput);
3663            mOutputs.removeItem(duplicatedOutput);
3664        }
3665    }
3666
3667    nextAudioPortGeneration();
3668
3669    ssize_t index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
3670    if (index >= 0) {
3671        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3672        status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
3673        mAudioPatches.removeItemsAt(index);
3674        mpClientInterface->onAudioPatchListUpdate();
3675    }
3676
3677    AudioParameter param;
3678    param.add(String8("closing"), String8("true"));
3679    mpClientInterface->setParameters(output, param.toString());
3680
3681    mpClientInterface->closeOutput(output);
3682    mOutputs.removeItem(output);
3683    mPreviousOutputs = mOutputs;
3684}
3685
3686void AudioPolicyManager::closeInput(audio_io_handle_t input)
3687{
3688    ALOGV("closeInput(%d)", input);
3689
3690    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
3691    if (inputDesc == NULL) {
3692        ALOGW("closeInput() unknown input %d", input);
3693        return;
3694    }
3695
3696    nextAudioPortGeneration();
3697
3698    ssize_t index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
3699    if (index >= 0) {
3700        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3701        status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
3702        mAudioPatches.removeItemsAt(index);
3703        mpClientInterface->onAudioPatchListUpdate();
3704    }
3705
3706    mpClientInterface->closeInput(input);
3707    mInputs.removeItem(input);
3708}
3709
3710SortedVector<audio_io_handle_t> AudioPolicyManager::getOutputsForDevice(audio_devices_t device,
3711                        DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > openOutputs)
3712{
3713    SortedVector<audio_io_handle_t> outputs;
3714
3715    ALOGVV("getOutputsForDevice() device %04x", device);
3716    for (size_t i = 0; i < openOutputs.size(); i++) {
3717        ALOGVV("output %d isDuplicated=%d device=%04x",
3718                i, openOutputs.valueAt(i)->isDuplicated(), openOutputs.valueAt(i)->supportedDevices());
3719        if ((device & openOutputs.valueAt(i)->supportedDevices()) == device) {
3720            ALOGVV("getOutputsForDevice() found output %d", openOutputs.keyAt(i));
3721            outputs.add(openOutputs.keyAt(i));
3722        }
3723    }
3724    return outputs;
3725}
3726
3727bool AudioPolicyManager::vectorsEqual(SortedVector<audio_io_handle_t>& outputs1,
3728                                   SortedVector<audio_io_handle_t>& outputs2)
3729{
3730    if (outputs1.size() != outputs2.size()) {
3731        return false;
3732    }
3733    for (size_t i = 0; i < outputs1.size(); i++) {
3734        if (outputs1[i] != outputs2[i]) {
3735            return false;
3736        }
3737    }
3738    return true;
3739}
3740
3741void AudioPolicyManager::checkOutputForStrategy(routing_strategy strategy)
3742{
3743    audio_devices_t oldDevice = getDeviceForStrategy(strategy, true /*fromCache*/);
3744    audio_devices_t newDevice = getDeviceForStrategy(strategy, false /*fromCache*/);
3745    SortedVector<audio_io_handle_t> srcOutputs = getOutputsForDevice(oldDevice, mPreviousOutputs);
3746    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(newDevice, mOutputs);
3747
3748    if (!vectorsEqual(srcOutputs,dstOutputs)) {
3749        ALOGV("checkOutputForStrategy() strategy %d, moving from output %d to output %d",
3750              strategy, srcOutputs[0], dstOutputs[0]);
3751        // mute strategy while moving tracks from one output to another
3752        for (size_t i = 0; i < srcOutputs.size(); i++) {
3753            sp<AudioOutputDescriptor> desc = mOutputs.valueFor(srcOutputs[i]);
3754            if (desc->isStrategyActive(strategy)) {
3755                setStrategyMute(strategy, true, srcOutputs[i]);
3756                setStrategyMute(strategy, false, srcOutputs[i], MUTE_TIME_MS, newDevice);
3757            }
3758        }
3759
3760        // Move effects associated to this strategy from previous output to new output
3761        if (strategy == STRATEGY_MEDIA) {
3762            audio_io_handle_t fxOutput = selectOutputForEffects(dstOutputs);
3763            SortedVector<audio_io_handle_t> moved;
3764            for (size_t i = 0; i < mEffects.size(); i++) {
3765                sp<EffectDescriptor> effectDesc = mEffects.valueAt(i);
3766                if (effectDesc->mSession == AUDIO_SESSION_OUTPUT_MIX &&
3767                        effectDesc->mIo != fxOutput) {
3768                    if (moved.indexOf(effectDesc->mIo) < 0) {
3769                        ALOGV("checkOutputForStrategy() moving effect %d to output %d",
3770                              mEffects.keyAt(i), fxOutput);
3771                        mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, effectDesc->mIo,
3772                                                       fxOutput);
3773                        moved.add(effectDesc->mIo);
3774                    }
3775                    effectDesc->mIo = fxOutput;
3776                }
3777            }
3778        }
3779        // Move tracks associated to this strategy from previous output to new output
3780        for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
3781            if (i == AUDIO_STREAM_PATCH) {
3782                continue;
3783            }
3784            if (getStrategy((audio_stream_type_t)i) == strategy) {
3785                mpClientInterface->invalidateStream((audio_stream_type_t)i);
3786            }
3787        }
3788    }
3789}
3790
3791void AudioPolicyManager::checkOutputForAllStrategies()
3792{
3793    if (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_SYSTEM_ENFORCED)
3794        checkOutputForStrategy(STRATEGY_ENFORCED_AUDIBLE);
3795    checkOutputForStrategy(STRATEGY_PHONE);
3796    if (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] != AUDIO_POLICY_FORCE_SYSTEM_ENFORCED)
3797        checkOutputForStrategy(STRATEGY_ENFORCED_AUDIBLE);
3798    checkOutputForStrategy(STRATEGY_SONIFICATION);
3799    checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
3800    checkOutputForStrategy(STRATEGY_ACCESSIBILITY);
3801    checkOutputForStrategy(STRATEGY_MEDIA);
3802    checkOutputForStrategy(STRATEGY_DTMF);
3803    checkOutputForStrategy(STRATEGY_REROUTING);
3804}
3805
3806audio_io_handle_t AudioPolicyManager::getA2dpOutput()
3807{
3808    for (size_t i = 0; i < mOutputs.size(); i++) {
3809        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
3810        if (!outputDesc->isDuplicated() && outputDesc->device() & AUDIO_DEVICE_OUT_ALL_A2DP) {
3811            return mOutputs.keyAt(i);
3812        }
3813    }
3814
3815    return 0;
3816}
3817
3818void AudioPolicyManager::checkA2dpSuspend()
3819{
3820    audio_io_handle_t a2dpOutput = getA2dpOutput();
3821    if (a2dpOutput == 0) {
3822        mA2dpSuspended = false;
3823        return;
3824    }
3825
3826    bool isScoConnected =
3827            ((mAvailableInputDevices.types() & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET &
3828                    ~AUDIO_DEVICE_BIT_IN) != 0) ||
3829            ((mAvailableOutputDevices.types() & AUDIO_DEVICE_OUT_ALL_SCO) != 0);
3830    // suspend A2DP output if:
3831    //      (NOT already suspended) &&
3832    //      ((SCO device is connected &&
3833    //       (forced usage for communication || for record is SCO))) ||
3834    //      (phone state is ringing || in call)
3835    //
3836    // restore A2DP output if:
3837    //      (Already suspended) &&
3838    //      ((SCO device is NOT connected ||
3839    //       (forced usage NOT for communication && NOT for record is SCO))) &&
3840    //      (phone state is NOT ringing && NOT in call)
3841    //
3842    if (mA2dpSuspended) {
3843        if ((!isScoConnected ||
3844             ((mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] != AUDIO_POLICY_FORCE_BT_SCO) &&
3845              (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] != AUDIO_POLICY_FORCE_BT_SCO))) &&
3846             ((mPhoneState != AUDIO_MODE_IN_CALL) &&
3847              (mPhoneState != AUDIO_MODE_RINGTONE))) {
3848
3849            mpClientInterface->restoreOutput(a2dpOutput);
3850            mA2dpSuspended = false;
3851        }
3852    } else {
3853        if ((isScoConnected &&
3854             ((mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] == AUDIO_POLICY_FORCE_BT_SCO) ||
3855              (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] == AUDIO_POLICY_FORCE_BT_SCO))) ||
3856             ((mPhoneState == AUDIO_MODE_IN_CALL) ||
3857              (mPhoneState == AUDIO_MODE_RINGTONE))) {
3858
3859            mpClientInterface->suspendOutput(a2dpOutput);
3860            mA2dpSuspended = true;
3861        }
3862    }
3863}
3864
3865audio_devices_t AudioPolicyManager::getNewOutputDevice(audio_io_handle_t output, bool fromCache)
3866{
3867    audio_devices_t device = AUDIO_DEVICE_NONE;
3868
3869    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
3870
3871    ssize_t index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
3872    if (index >= 0) {
3873        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3874        if (patchDesc->mUid != mUidCached) {
3875            ALOGV("getNewOutputDevice() device %08x forced by patch %d",
3876                  outputDesc->device(), outputDesc->mPatchHandle);
3877            return outputDesc->device();
3878        }
3879    }
3880
3881    // check the following by order of priority to request a routing change if necessary:
3882    // 1: the strategy enforced audible is active and enforced on the output:
3883    //      use device for strategy enforced audible
3884    // 2: we are in call or the strategy phone is active on the output:
3885    //      use device for strategy phone
3886    // 3: the strategy for enforced audible is active but not enforced on the output:
3887    //      use the device for strategy enforced audible
3888    // 4: the strategy sonification is active on the output:
3889    //      use device for strategy sonification
3890    // 5: the strategy "respectful" sonification is active on the output:
3891    //      use device for strategy "respectful" sonification
3892    // 6: the strategy accessibility is active on the output:
3893    //      use device for strategy accessibility
3894    // 7: the strategy media is active on the output:
3895    //      use device for strategy media
3896    // 8: the strategy DTMF is active on the output:
3897    //      use device for strategy DTMF
3898    // 9: the strategy for beacon, a.k.a. "transmitted through speaker" is active on the output:
3899    //      use device for strategy t-t-s
3900    if (outputDesc->isStrategyActive(STRATEGY_ENFORCED_AUDIBLE) &&
3901        mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_SYSTEM_ENFORCED) {
3902        device = getDeviceForStrategy(STRATEGY_ENFORCED_AUDIBLE, fromCache);
3903    } else if (isInCall() ||
3904                    outputDesc->isStrategyActive(STRATEGY_PHONE)) {
3905        device = getDeviceForStrategy(STRATEGY_PHONE, fromCache);
3906    } else if (outputDesc->isStrategyActive(STRATEGY_ENFORCED_AUDIBLE)) {
3907        device = getDeviceForStrategy(STRATEGY_ENFORCED_AUDIBLE, fromCache);
3908    } else if (outputDesc->isStrategyActive(STRATEGY_SONIFICATION)) {
3909        device = getDeviceForStrategy(STRATEGY_SONIFICATION, fromCache);
3910    } else if (outputDesc->isStrategyActive(STRATEGY_SONIFICATION_RESPECTFUL)) {
3911        device = getDeviceForStrategy(STRATEGY_SONIFICATION_RESPECTFUL, fromCache);
3912    } else if (outputDesc->isStrategyActive(STRATEGY_ACCESSIBILITY)) {
3913        device = getDeviceForStrategy(STRATEGY_ACCESSIBILITY, fromCache);
3914    } else if (outputDesc->isStrategyActive(STRATEGY_MEDIA)) {
3915        device = getDeviceForStrategy(STRATEGY_MEDIA, fromCache);
3916    } else if (outputDesc->isStrategyActive(STRATEGY_DTMF)) {
3917        device = getDeviceForStrategy(STRATEGY_DTMF, fromCache);
3918    } else if (outputDesc->isStrategyActive(STRATEGY_TRANSMITTED_THROUGH_SPEAKER)) {
3919        device = getDeviceForStrategy(STRATEGY_TRANSMITTED_THROUGH_SPEAKER, fromCache);
3920    } else if (outputDesc->isStrategyActive(STRATEGY_REROUTING)) {
3921        device = getDeviceForStrategy(STRATEGY_REROUTING, fromCache);
3922    }
3923
3924    ALOGV("getNewOutputDevice() selected device %x", device);
3925    return device;
3926}
3927
3928audio_devices_t AudioPolicyManager::getNewInputDevice(audio_io_handle_t input)
3929{
3930    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
3931
3932    ssize_t index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
3933    if (index >= 0) {
3934        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3935        if (patchDesc->mUid != mUidCached) {
3936            ALOGV("getNewInputDevice() device %08x forced by patch %d",
3937                  inputDesc->mDevice, inputDesc->mPatchHandle);
3938            return inputDesc->mDevice;
3939        }
3940    }
3941
3942    audio_devices_t device = getDeviceForInputSource(inputDesc->mInputSource);
3943
3944    ALOGV("getNewInputDevice() selected device %x", device);
3945    return device;
3946}
3947
3948uint32_t AudioPolicyManager::getStrategyForStream(audio_stream_type_t stream) {
3949    return (uint32_t)getStrategy(stream);
3950}
3951
3952audio_devices_t AudioPolicyManager::getDevicesForStream(audio_stream_type_t stream) {
3953    // By checking the range of stream before calling getStrategy, we avoid
3954    // getStrategy's behavior for invalid streams.  getStrategy would do a ALOGE
3955    // and then return STRATEGY_MEDIA, but we want to return the empty set.
3956    if (stream < (audio_stream_type_t) 0 || stream >= AUDIO_STREAM_PUBLIC_CNT) {
3957        return AUDIO_DEVICE_NONE;
3958    }
3959    audio_devices_t devices;
3960    AudioPolicyManager::routing_strategy strategy = getStrategy(stream);
3961    devices = getDeviceForStrategy(strategy, true /*fromCache*/);
3962    SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(devices, mOutputs);
3963    for (size_t i = 0; i < outputs.size(); i++) {
3964        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(outputs[i]);
3965        if (outputDesc->isStrategyActive(strategy)) {
3966            devices = outputDesc->device();
3967            break;
3968        }
3969    }
3970
3971    /*Filter SPEAKER_SAFE out of results, as AudioService doesn't know about it
3972      and doesn't really need to.*/
3973    if (devices & AUDIO_DEVICE_OUT_SPEAKER_SAFE) {
3974        devices |= AUDIO_DEVICE_OUT_SPEAKER;
3975        devices &= ~AUDIO_DEVICE_OUT_SPEAKER_SAFE;
3976    }
3977
3978    return devices;
3979}
3980
3981AudioPolicyManager::routing_strategy AudioPolicyManager::getStrategy(
3982        audio_stream_type_t stream) {
3983
3984    ALOG_ASSERT(stream != AUDIO_STREAM_PATCH,"getStrategy() called for AUDIO_STREAM_PATCH");
3985
3986    // stream to strategy mapping
3987    switch (stream) {
3988    case AUDIO_STREAM_VOICE_CALL:
3989    case AUDIO_STREAM_BLUETOOTH_SCO:
3990        return STRATEGY_PHONE;
3991    case AUDIO_STREAM_RING:
3992    case AUDIO_STREAM_ALARM:
3993        return STRATEGY_SONIFICATION;
3994    case AUDIO_STREAM_NOTIFICATION:
3995        return STRATEGY_SONIFICATION_RESPECTFUL;
3996    case AUDIO_STREAM_DTMF:
3997        return STRATEGY_DTMF;
3998    default:
3999        ALOGE("unknown stream type %d", stream);
4000    case AUDIO_STREAM_SYSTEM:
4001        // NOTE: SYSTEM stream uses MEDIA strategy because muting music and switching outputs
4002        // while key clicks are played produces a poor result
4003    case AUDIO_STREAM_MUSIC:
4004        return STRATEGY_MEDIA;
4005    case AUDIO_STREAM_ENFORCED_AUDIBLE:
4006        return STRATEGY_ENFORCED_AUDIBLE;
4007    case AUDIO_STREAM_TTS:
4008        return STRATEGY_TRANSMITTED_THROUGH_SPEAKER;
4009    case AUDIO_STREAM_ACCESSIBILITY:
4010        return STRATEGY_ACCESSIBILITY;
4011    case AUDIO_STREAM_REROUTING:
4012        return STRATEGY_REROUTING;
4013    }
4014}
4015
4016uint32_t AudioPolicyManager::getStrategyForAttr(const audio_attributes_t *attr) {
4017    // flags to strategy mapping
4018    if ((attr->flags & AUDIO_FLAG_BEACON) == AUDIO_FLAG_BEACON) {
4019        return (uint32_t) STRATEGY_TRANSMITTED_THROUGH_SPEAKER;
4020    }
4021    if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
4022        return (uint32_t) STRATEGY_ENFORCED_AUDIBLE;
4023    }
4024
4025    // usage to strategy mapping
4026    switch (attr->usage) {
4027    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
4028        if (isStreamActive(AUDIO_STREAM_RING) || isStreamActive(AUDIO_STREAM_ALARM)) {
4029            return (uint32_t) STRATEGY_SONIFICATION;
4030        }
4031        if (isInCall()) {
4032            return (uint32_t) STRATEGY_PHONE;
4033        }
4034        // FALL THROUGH
4035
4036    case AUDIO_USAGE_MEDIA:
4037    case AUDIO_USAGE_GAME:
4038    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
4039    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
4040        return (uint32_t) STRATEGY_MEDIA;
4041
4042    case AUDIO_USAGE_VOICE_COMMUNICATION:
4043        return (uint32_t) STRATEGY_PHONE;
4044
4045    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
4046        return (uint32_t) STRATEGY_DTMF;
4047
4048    case AUDIO_USAGE_ALARM:
4049    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
4050        return (uint32_t) STRATEGY_SONIFICATION;
4051
4052    case AUDIO_USAGE_NOTIFICATION:
4053    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
4054    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
4055    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
4056    case AUDIO_USAGE_NOTIFICATION_EVENT:
4057        return (uint32_t) STRATEGY_SONIFICATION_RESPECTFUL;
4058
4059    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
4060        if (isStreamActive(AUDIO_STREAM_RING, 0) ||
4061                isStreamActive(AUDIO_STREAM_ALARM, 0)) {
4062            return (uint32_t) STRATEGY_SONIFICATION;
4063        }
4064        return (uint32_t) STRATEGY_ACCESSIBILITY;
4065
4066    case AUDIO_USAGE_UNKNOWN:
4067    default:
4068        return (uint32_t) STRATEGY_MEDIA;
4069    }
4070}
4071
4072void AudioPolicyManager::handleNotificationRoutingForStream(audio_stream_type_t stream) {
4073    switch(stream) {
4074    case AUDIO_STREAM_MUSIC:
4075        checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
4076        updateDevicesAndOutputs();
4077        break;
4078    default:
4079        break;
4080    }
4081}
4082
4083bool AudioPolicyManager::isAnyOutputActive(audio_stream_type_t streamToIgnore) {
4084    for (size_t s = 0 ; s < AUDIO_STREAM_CNT ; s++) {
4085        if (s == (size_t) streamToIgnore) {
4086            continue;
4087        }
4088        for (size_t i = 0; i < mOutputs.size(); i++) {
4089            const sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
4090            if (outputDesc->mRefCount[s] != 0) {
4091                return true;
4092            }
4093        }
4094    }
4095    return false;
4096}
4097
4098uint32_t AudioPolicyManager::handleEventForBeacon(int event) {
4099    switch(event) {
4100    case STARTING_OUTPUT:
4101        mBeaconMuteRefCount++;
4102        break;
4103    case STOPPING_OUTPUT:
4104        if (mBeaconMuteRefCount > 0) {
4105            mBeaconMuteRefCount--;
4106        }
4107        break;
4108    case STARTING_BEACON:
4109        mBeaconPlayingRefCount++;
4110        break;
4111    case STOPPING_BEACON:
4112        if (mBeaconPlayingRefCount > 0) {
4113            mBeaconPlayingRefCount--;
4114        }
4115        break;
4116    }
4117
4118    if (mBeaconMuteRefCount > 0) {
4119        // any playback causes beacon to be muted
4120        return setBeaconMute(true);
4121    } else {
4122        // no other playback: unmute when beacon starts playing, mute when it stops
4123        return setBeaconMute(mBeaconPlayingRefCount == 0);
4124    }
4125}
4126
4127uint32_t AudioPolicyManager::setBeaconMute(bool mute) {
4128    ALOGV("setBeaconMute(%d) mBeaconMuteRefCount=%d mBeaconPlayingRefCount=%d",
4129            mute, mBeaconMuteRefCount, mBeaconPlayingRefCount);
4130    // keep track of muted state to avoid repeating mute/unmute operations
4131    if (mBeaconMuted != mute) {
4132        // mute/unmute AUDIO_STREAM_TTS on all outputs
4133        ALOGV("\t muting %d", mute);
4134        uint32_t maxLatency = 0;
4135        for (size_t i = 0; i < mOutputs.size(); i++) {
4136            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
4137            setStreamMute(AUDIO_STREAM_TTS, mute/*on*/,
4138                    desc->mIoHandle,
4139                    0 /*delay*/, AUDIO_DEVICE_NONE);
4140            const uint32_t latency = desc->latency() * 2;
4141            if (latency > maxLatency) {
4142                maxLatency = latency;
4143            }
4144        }
4145        mBeaconMuted = mute;
4146        return maxLatency;
4147    }
4148    return 0;
4149}
4150
4151audio_devices_t AudioPolicyManager::getDeviceForStrategy(routing_strategy strategy,
4152                                                             bool fromCache)
4153{
4154    uint32_t device = AUDIO_DEVICE_NONE;
4155
4156    if (fromCache) {
4157        ALOGVV("getDeviceForStrategy() from cache strategy %d, device %x",
4158              strategy, mDeviceForStrategy[strategy]);
4159        return mDeviceForStrategy[strategy];
4160    }
4161    audio_devices_t availableOutputDeviceTypes = mAvailableOutputDevices.types();
4162    switch (strategy) {
4163
4164    case STRATEGY_TRANSMITTED_THROUGH_SPEAKER:
4165        device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4166        if (!device) {
4167            ALOGE("getDeviceForStrategy() no device found for "\
4168                    "STRATEGY_TRANSMITTED_THROUGH_SPEAKER");
4169        }
4170        break;
4171
4172    case STRATEGY_SONIFICATION_RESPECTFUL:
4173        if (isInCall()) {
4174            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
4175        } else if (isStreamActiveRemotely(AUDIO_STREAM_MUSIC,
4176                SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
4177            // while media is playing on a remote device, use the the sonification behavior.
4178            // Note that we test this usecase before testing if media is playing because
4179            //   the isStreamActive() method only informs about the activity of a stream, not
4180            //   if it's for local playback. Note also that we use the same delay between both tests
4181            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
4182            //user "safe" speaker if available instead of normal speaker to avoid triggering
4183            //other acoustic safety mechanisms for notification
4184            if (device == AUDIO_DEVICE_OUT_SPEAKER && (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER_SAFE))
4185                device = AUDIO_DEVICE_OUT_SPEAKER_SAFE;
4186        } else if (isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
4187            // while media is playing (or has recently played), use the same device
4188            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
4189        } else {
4190            // when media is not playing anymore, fall back on the sonification behavior
4191            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
4192            //user "safe" speaker if available instead of normal speaker to avoid triggering
4193            //other acoustic safety mechanisms for notification
4194            if (device == AUDIO_DEVICE_OUT_SPEAKER && (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER_SAFE))
4195                device = AUDIO_DEVICE_OUT_SPEAKER_SAFE;
4196        }
4197
4198        break;
4199
4200    case STRATEGY_DTMF:
4201        if (!isInCall()) {
4202            // when off call, DTMF strategy follows the same rules as MEDIA strategy
4203            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
4204            break;
4205        }
4206        // when in call, DTMF and PHONE strategies follow the same rules
4207        // FALL THROUGH
4208
4209    case STRATEGY_PHONE:
4210        // Force use of only devices on primary output if:
4211        // - in call AND
4212        //   - cannot route from voice call RX OR
4213        //   - audio HAL version is < 3.0 and TX device is on the primary HW module
4214        if (mPhoneState == AUDIO_MODE_IN_CALL) {
4215            audio_devices_t txDevice = getDeviceForInputSource(AUDIO_SOURCE_VOICE_COMMUNICATION);
4216            sp<AudioOutputDescriptor> hwOutputDesc = mOutputs.valueFor(mPrimaryOutput);
4217            if (((mAvailableInputDevices.types() &
4218                    AUDIO_DEVICE_IN_TELEPHONY_RX & ~AUDIO_DEVICE_BIT_IN) == 0) ||
4219                    (((txDevice & availablePrimaryInputDevices() & ~AUDIO_DEVICE_BIT_IN) != 0) &&
4220                         (hwOutputDesc->getAudioPort()->mModule->mHalVersion <
4221                             AUDIO_DEVICE_API_VERSION_3_0))) {
4222                availableOutputDeviceTypes = availablePrimaryOutputDevices();
4223            }
4224        }
4225        // for phone strategy, we first consider the forced use and then the available devices by order
4226        // of priority
4227        switch (mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]) {
4228        case AUDIO_POLICY_FORCE_BT_SCO:
4229            if (!isInCall() || strategy != STRATEGY_DTMF) {
4230                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT;
4231                if (device) break;
4232            }
4233            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET;
4234            if (device) break;
4235            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO;
4236            if (device) break;
4237            // if SCO device is requested but no SCO device is available, fall back to default case
4238            // FALL THROUGH
4239
4240        default:    // FORCE_NONE
4241            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to A2DP
4242            if (!isInCall() &&
4243                    (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
4244                    (getA2dpOutput() != 0)) {
4245                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP;
4246                if (device) break;
4247                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
4248                if (device) break;
4249            }
4250            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
4251            if (device) break;
4252            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADSET;
4253            if (device) break;
4254            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
4255            if (device) break;
4256            if (mPhoneState != AUDIO_MODE_IN_CALL) {
4257                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
4258                if (device) break;
4259                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
4260                if (device) break;
4261                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
4262                if (device) break;
4263                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
4264                if (device) break;
4265            }
4266            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_EARPIECE;
4267            if (device) break;
4268            device = mDefaultOutputDevice->mDeviceType;
4269            if (device == AUDIO_DEVICE_NONE) {
4270                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE");
4271            }
4272            break;
4273
4274        case AUDIO_POLICY_FORCE_SPEAKER:
4275            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to
4276            // A2DP speaker when forcing to speaker output
4277            if (!isInCall() &&
4278                    (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
4279                    (getA2dpOutput() != 0)) {
4280                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
4281                if (device) break;
4282            }
4283            if (mPhoneState != AUDIO_MODE_IN_CALL) {
4284                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
4285                if (device) break;
4286                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
4287                if (device) break;
4288                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
4289                if (device) break;
4290                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
4291                if (device) break;
4292                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
4293                if (device) break;
4294            }
4295            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_LINE;
4296            if (device) break;
4297            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4298            if (device) break;
4299            device = mDefaultOutputDevice->mDeviceType;
4300            if (device == AUDIO_DEVICE_NONE) {
4301                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE, FORCE_SPEAKER");
4302            }
4303            break;
4304        }
4305    break;
4306
4307    case STRATEGY_SONIFICATION:
4308
4309        // If incall, just select the STRATEGY_PHONE device: The rest of the behavior is handled by
4310        // handleIncallSonification().
4311        if (isInCall()) {
4312            device = getDeviceForStrategy(STRATEGY_PHONE, false /*fromCache*/);
4313            break;
4314        }
4315        // FALL THROUGH
4316
4317    case STRATEGY_ENFORCED_AUDIBLE:
4318        // strategy STRATEGY_ENFORCED_AUDIBLE uses same routing policy as STRATEGY_SONIFICATION
4319        // except:
4320        //   - when in call where it doesn't default to STRATEGY_PHONE behavior
4321        //   - in countries where not enforced in which case it follows STRATEGY_MEDIA
4322
4323        if ((strategy == STRATEGY_SONIFICATION) ||
4324                (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_SYSTEM_ENFORCED)) {
4325            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4326            if (device == AUDIO_DEVICE_NONE) {
4327                ALOGE("getDeviceForStrategy() speaker device not found for STRATEGY_SONIFICATION");
4328            }
4329        }
4330        // The second device used for sonification is the same as the device used by media strategy
4331        // FALL THROUGH
4332
4333    // FIXME: STRATEGY_ACCESSIBILITY and STRATEGY_REROUTING follow STRATEGY_MEDIA for now
4334    case STRATEGY_ACCESSIBILITY:
4335    case STRATEGY_REROUTING:
4336    case STRATEGY_MEDIA: {
4337        uint32_t device2 = AUDIO_DEVICE_NONE;
4338        if (strategy != STRATEGY_SONIFICATION) {
4339            // no sonification on remote submix (e.g. WFD)
4340            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_REMOTE_SUBMIX;
4341        }
4342        if ((device2 == AUDIO_DEVICE_NONE) &&
4343                (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
4344                (getA2dpOutput() != 0)) {
4345            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP;
4346            if (device2 == AUDIO_DEVICE_NONE) {
4347                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
4348            }
4349            if (device2 == AUDIO_DEVICE_NONE) {
4350                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
4351            }
4352        }
4353        if ((device2 == AUDIO_DEVICE_NONE) &&
4354            (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] == AUDIO_POLICY_FORCE_SPEAKER)) {
4355            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4356        }
4357        if (device2 == AUDIO_DEVICE_NONE) {
4358            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
4359        }
4360        if ((device2 == AUDIO_DEVICE_NONE)) {
4361            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_LINE;
4362        }
4363        if (device2 == AUDIO_DEVICE_NONE) {
4364            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADSET;
4365        }
4366        if (device2 == AUDIO_DEVICE_NONE) {
4367            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
4368        }
4369        if (device2 == AUDIO_DEVICE_NONE) {
4370            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
4371        }
4372        if (device2 == AUDIO_DEVICE_NONE) {
4373            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
4374        }
4375        if ((device2 == AUDIO_DEVICE_NONE) && (strategy != STRATEGY_SONIFICATION)) {
4376            // no sonification on aux digital (e.g. HDMI)
4377            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
4378        }
4379        if ((device2 == AUDIO_DEVICE_NONE) &&
4380                (mForceUse[AUDIO_POLICY_FORCE_FOR_DOCK] == AUDIO_POLICY_FORCE_ANALOG_DOCK)) {
4381            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
4382        }
4383        if (device2 == AUDIO_DEVICE_NONE) {
4384            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4385        }
4386        int device3 = AUDIO_DEVICE_NONE;
4387        if (strategy == STRATEGY_MEDIA) {
4388            // ARC, SPDIF and AUX_LINE can co-exist with others.
4389            device3 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_HDMI_ARC;
4390            device3 |= (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPDIF);
4391            device3 |= (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_LINE);
4392        }
4393
4394        device2 |= device3;
4395        // device is DEVICE_OUT_SPEAKER if we come from case STRATEGY_SONIFICATION or
4396        // STRATEGY_ENFORCED_AUDIBLE, AUDIO_DEVICE_NONE otherwise
4397        device |= device2;
4398
4399        // If hdmi system audio mode is on, remove speaker out of output list.
4400        if ((strategy == STRATEGY_MEDIA) &&
4401            (mForceUse[AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO] ==
4402                AUDIO_POLICY_FORCE_HDMI_SYSTEM_AUDIO_ENFORCED)) {
4403            device &= ~AUDIO_DEVICE_OUT_SPEAKER;
4404        }
4405
4406        if (device) break;
4407        device = mDefaultOutputDevice->mDeviceType;
4408        if (device == AUDIO_DEVICE_NONE) {
4409            ALOGE("getDeviceForStrategy() no device found for STRATEGY_MEDIA");
4410        }
4411        } break;
4412
4413    default:
4414        ALOGW("getDeviceForStrategy() unknown strategy: %d", strategy);
4415        break;
4416    }
4417
4418    ALOGVV("getDeviceForStrategy() strategy %d, device %x", strategy, device);
4419    return device;
4420}
4421
4422void AudioPolicyManager::updateDevicesAndOutputs()
4423{
4424    for (int i = 0; i < NUM_STRATEGIES; i++) {
4425        mDeviceForStrategy[i] = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
4426    }
4427    mPreviousOutputs = mOutputs;
4428}
4429
4430uint32_t AudioPolicyManager::checkDeviceMuteStrategies(sp<AudioOutputDescriptor> outputDesc,
4431                                                       audio_devices_t prevDevice,
4432                                                       uint32_t delayMs)
4433{
4434    // mute/unmute strategies using an incompatible device combination
4435    // if muting, wait for the audio in pcm buffer to be drained before proceeding
4436    // if unmuting, unmute only after the specified delay
4437    if (outputDesc->isDuplicated()) {
4438        return 0;
4439    }
4440
4441    uint32_t muteWaitMs = 0;
4442    audio_devices_t device = outputDesc->device();
4443    bool shouldMute = outputDesc->isActive() && (popcount(device) >= 2);
4444
4445    for (size_t i = 0; i < NUM_STRATEGIES; i++) {
4446        audio_devices_t curDevice = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
4447        curDevice = curDevice & outputDesc->mProfile->mSupportedDevices.types();
4448        bool mute = shouldMute && (curDevice & device) && (curDevice != device);
4449        bool doMute = false;
4450
4451        if (mute && !outputDesc->mStrategyMutedByDevice[i]) {
4452            doMute = true;
4453            outputDesc->mStrategyMutedByDevice[i] = true;
4454        } else if (!mute && outputDesc->mStrategyMutedByDevice[i]){
4455            doMute = true;
4456            outputDesc->mStrategyMutedByDevice[i] = false;
4457        }
4458        if (doMute) {
4459            for (size_t j = 0; j < mOutputs.size(); j++) {
4460                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(j);
4461                // skip output if it does not share any device with current output
4462                if ((desc->supportedDevices() & outputDesc->supportedDevices())
4463                        == AUDIO_DEVICE_NONE) {
4464                    continue;
4465                }
4466                audio_io_handle_t curOutput = mOutputs.keyAt(j);
4467                ALOGVV("checkDeviceMuteStrategies() %s strategy %d (curDevice %04x) on output %d",
4468                      mute ? "muting" : "unmuting", i, curDevice, curOutput);
4469                setStrategyMute((routing_strategy)i, mute, curOutput, mute ? 0 : delayMs);
4470                if (desc->isStrategyActive((routing_strategy)i)) {
4471                    if (mute) {
4472                        // FIXME: should not need to double latency if volume could be applied
4473                        // immediately by the audioflinger mixer. We must account for the delay
4474                        // between now and the next time the audioflinger thread for this output
4475                        // will process a buffer (which corresponds to one buffer size,
4476                        // usually 1/2 or 1/4 of the latency).
4477                        if (muteWaitMs < desc->latency() * 2) {
4478                            muteWaitMs = desc->latency() * 2;
4479                        }
4480                    }
4481                }
4482            }
4483        }
4484    }
4485
4486    // temporary mute output if device selection changes to avoid volume bursts due to
4487    // different per device volumes
4488    if (outputDesc->isActive() && (device != prevDevice)) {
4489        if (muteWaitMs < outputDesc->latency() * 2) {
4490            muteWaitMs = outputDesc->latency() * 2;
4491        }
4492        for (size_t i = 0; i < NUM_STRATEGIES; i++) {
4493            if (outputDesc->isStrategyActive((routing_strategy)i)) {
4494                setStrategyMute((routing_strategy)i, true, outputDesc->mIoHandle);
4495                // do tempMute unmute after twice the mute wait time
4496                setStrategyMute((routing_strategy)i, false, outputDesc->mIoHandle,
4497                                muteWaitMs *2, device);
4498            }
4499        }
4500    }
4501
4502    // wait for the PCM output buffers to empty before proceeding with the rest of the command
4503    if (muteWaitMs > delayMs) {
4504        muteWaitMs -= delayMs;
4505        usleep(muteWaitMs * 1000);
4506        return muteWaitMs;
4507    }
4508    return 0;
4509}
4510
4511uint32_t AudioPolicyManager::setOutputDevice(audio_io_handle_t output,
4512                                             audio_devices_t device,
4513                                             bool force,
4514                                             int delayMs,
4515                                             audio_patch_handle_t *patchHandle,
4516                                             const char* address)
4517{
4518    ALOGV("setOutputDevice() output %d device %04x delayMs %d", output, device, delayMs);
4519    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4520    AudioParameter param;
4521    uint32_t muteWaitMs;
4522
4523    if (outputDesc->isDuplicated()) {
4524        muteWaitMs = setOutputDevice(outputDesc->mOutput1->mIoHandle, device, force, delayMs);
4525        muteWaitMs += setOutputDevice(outputDesc->mOutput2->mIoHandle, device, force, delayMs);
4526        return muteWaitMs;
4527    }
4528    // no need to proceed if new device is not AUDIO_DEVICE_NONE and not supported by current
4529    // output profile
4530    if ((device != AUDIO_DEVICE_NONE) &&
4531            ((device & outputDesc->mProfile->mSupportedDevices.types()) == 0)) {
4532        return 0;
4533    }
4534
4535    // filter devices according to output selected
4536    device = (audio_devices_t)(device & outputDesc->mProfile->mSupportedDevices.types());
4537
4538    audio_devices_t prevDevice = outputDesc->mDevice;
4539
4540    ALOGV("setOutputDevice() prevDevice %04x", prevDevice);
4541
4542    if (device != AUDIO_DEVICE_NONE) {
4543        outputDesc->mDevice = device;
4544    }
4545    muteWaitMs = checkDeviceMuteStrategies(outputDesc, prevDevice, delayMs);
4546
4547    // Do not change the routing if:
4548    //      the requested device is AUDIO_DEVICE_NONE
4549    //      OR the requested device is the same as current device
4550    //  AND force is not specified
4551    //  AND the output is connected by a valid audio patch.
4552    // Doing this check here allows the caller to call setOutputDevice() without conditions
4553    if ((device == AUDIO_DEVICE_NONE || device == prevDevice) && !force &&
4554            outputDesc->mPatchHandle != 0) {
4555        ALOGV("setOutputDevice() setting same device %04x or null device for output %d",
4556              device, output);
4557        return muteWaitMs;
4558    }
4559
4560    ALOGV("setOutputDevice() changing device");
4561
4562    // do the routing
4563    if (device == AUDIO_DEVICE_NONE) {
4564        resetOutputDevice(output, delayMs, NULL);
4565    } else {
4566        DeviceVector deviceList = (address == NULL) ?
4567                mAvailableOutputDevices.getDevicesFromType(device)
4568                : mAvailableOutputDevices.getDevicesFromTypeAddr(device, String8(address));
4569        if (!deviceList.isEmpty()) {
4570            struct audio_patch patch;
4571            outputDesc->toAudioPortConfig(&patch.sources[0]);
4572            patch.num_sources = 1;
4573            patch.num_sinks = 0;
4574            for (size_t i = 0; i < deviceList.size() && i < AUDIO_PATCH_PORTS_MAX; i++) {
4575                deviceList.itemAt(i)->toAudioPortConfig(&patch.sinks[i]);
4576                patch.num_sinks++;
4577            }
4578            ssize_t index;
4579            if (patchHandle && *patchHandle != AUDIO_PATCH_HANDLE_NONE) {
4580                index = mAudioPatches.indexOfKey(*patchHandle);
4581            } else {
4582                index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
4583            }
4584            sp< AudioPatch> patchDesc;
4585            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
4586            if (index >= 0) {
4587                patchDesc = mAudioPatches.valueAt(index);
4588                afPatchHandle = patchDesc->mAfPatchHandle;
4589            }
4590
4591            status_t status = mpClientInterface->createAudioPatch(&patch,
4592                                                                   &afPatchHandle,
4593                                                                   delayMs);
4594            ALOGV("setOutputDevice() createAudioPatch returned %d patchHandle %d"
4595                    "num_sources %d num_sinks %d",
4596                                       status, afPatchHandle, patch.num_sources, patch.num_sinks);
4597            if (status == NO_ERROR) {
4598                if (index < 0) {
4599                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
4600                                               &patch, mUidCached);
4601                    addAudioPatch(patchDesc->mHandle, patchDesc);
4602                } else {
4603                    patchDesc->mPatch = patch;
4604                }
4605                patchDesc->mAfPatchHandle = afPatchHandle;
4606                patchDesc->mUid = mUidCached;
4607                if (patchHandle) {
4608                    *patchHandle = patchDesc->mHandle;
4609                }
4610                outputDesc->mPatchHandle = patchDesc->mHandle;
4611                nextAudioPortGeneration();
4612                mpClientInterface->onAudioPatchListUpdate();
4613            }
4614        }
4615
4616        // inform all input as well
4617        for (size_t i = 0; i < mInputs.size(); i++) {
4618            const sp<AudioInputDescriptor>  inputDescriptor = mInputs.valueAt(i);
4619            if (!isVirtualInputDevice(inputDescriptor->mDevice)) {
4620                AudioParameter inputCmd = AudioParameter();
4621                ALOGV("%s: inform input %d of device:%d", __func__,
4622                      inputDescriptor->mIoHandle, device);
4623                inputCmd.addInt(String8(AudioParameter::keyRouting),device);
4624                mpClientInterface->setParameters(inputDescriptor->mIoHandle,
4625                                                 inputCmd.toString(),
4626                                                 delayMs);
4627            }
4628        }
4629    }
4630
4631    // update stream volumes according to new device
4632    applyStreamVolumes(output, device, delayMs);
4633
4634    return muteWaitMs;
4635}
4636
4637status_t AudioPolicyManager::resetOutputDevice(audio_io_handle_t output,
4638                                               int delayMs,
4639                                               audio_patch_handle_t *patchHandle)
4640{
4641    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4642    ssize_t index;
4643    if (patchHandle) {
4644        index = mAudioPatches.indexOfKey(*patchHandle);
4645    } else {
4646        index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
4647    }
4648    if (index < 0) {
4649        return INVALID_OPERATION;
4650    }
4651    sp< AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4652    status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, delayMs);
4653    ALOGV("resetOutputDevice() releaseAudioPatch returned %d", status);
4654    outputDesc->mPatchHandle = 0;
4655    removeAudioPatch(patchDesc->mHandle);
4656    nextAudioPortGeneration();
4657    mpClientInterface->onAudioPatchListUpdate();
4658    return status;
4659}
4660
4661status_t AudioPolicyManager::setInputDevice(audio_io_handle_t input,
4662                                            audio_devices_t device,
4663                                            bool force,
4664                                            audio_patch_handle_t *patchHandle)
4665{
4666    status_t status = NO_ERROR;
4667
4668    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
4669    if ((device != AUDIO_DEVICE_NONE) && ((device != inputDesc->mDevice) || force)) {
4670        inputDesc->mDevice = device;
4671
4672        DeviceVector deviceList = mAvailableInputDevices.getDevicesFromType(device);
4673        if (!deviceList.isEmpty()) {
4674            struct audio_patch patch;
4675            inputDesc->toAudioPortConfig(&patch.sinks[0]);
4676            // AUDIO_SOURCE_HOTWORD is for internal use only:
4677            // handled as AUDIO_SOURCE_VOICE_RECOGNITION by the audio HAL
4678            if (patch.sinks[0].ext.mix.usecase.source == AUDIO_SOURCE_HOTWORD &&
4679                    !inputDesc->mIsSoundTrigger) {
4680                patch.sinks[0].ext.mix.usecase.source = AUDIO_SOURCE_VOICE_RECOGNITION;
4681            }
4682            patch.num_sinks = 1;
4683            //only one input device for now
4684            deviceList.itemAt(0)->toAudioPortConfig(&patch.sources[0]);
4685            patch.num_sources = 1;
4686            ssize_t index;
4687            if (patchHandle && *patchHandle != AUDIO_PATCH_HANDLE_NONE) {
4688                index = mAudioPatches.indexOfKey(*patchHandle);
4689            } else {
4690                index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
4691            }
4692            sp< AudioPatch> patchDesc;
4693            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
4694            if (index >= 0) {
4695                patchDesc = mAudioPatches.valueAt(index);
4696                afPatchHandle = patchDesc->mAfPatchHandle;
4697            }
4698
4699            status_t status = mpClientInterface->createAudioPatch(&patch,
4700                                                                  &afPatchHandle,
4701                                                                  0);
4702            ALOGV("setInputDevice() createAudioPatch returned %d patchHandle %d",
4703                                                                          status, afPatchHandle);
4704            if (status == NO_ERROR) {
4705                if (index < 0) {
4706                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
4707                                               &patch, mUidCached);
4708                    addAudioPatch(patchDesc->mHandle, patchDesc);
4709                } else {
4710                    patchDesc->mPatch = patch;
4711                }
4712                patchDesc->mAfPatchHandle = afPatchHandle;
4713                patchDesc->mUid = mUidCached;
4714                if (patchHandle) {
4715                    *patchHandle = patchDesc->mHandle;
4716                }
4717                inputDesc->mPatchHandle = patchDesc->mHandle;
4718                nextAudioPortGeneration();
4719                mpClientInterface->onAudioPatchListUpdate();
4720            }
4721        }
4722    }
4723    return status;
4724}
4725
4726status_t AudioPolicyManager::resetInputDevice(audio_io_handle_t input,
4727                                              audio_patch_handle_t *patchHandle)
4728{
4729    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
4730    ssize_t index;
4731    if (patchHandle) {
4732        index = mAudioPatches.indexOfKey(*patchHandle);
4733    } else {
4734        index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
4735    }
4736    if (index < 0) {
4737        return INVALID_OPERATION;
4738    }
4739    sp< AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4740    status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
4741    ALOGV("resetInputDevice() releaseAudioPatch returned %d", status);
4742    inputDesc->mPatchHandle = 0;
4743    removeAudioPatch(patchDesc->mHandle);
4744    nextAudioPortGeneration();
4745    mpClientInterface->onAudioPatchListUpdate();
4746    return status;
4747}
4748
4749sp<AudioPolicyManager::IOProfile> AudioPolicyManager::getInputProfile(audio_devices_t device,
4750                                                   uint32_t& samplingRate,
4751                                                   audio_format_t format,
4752                                                   audio_channel_mask_t channelMask,
4753                                                   audio_input_flags_t flags)
4754{
4755    // Choose an input profile based on the requested capture parameters: select the first available
4756    // profile supporting all requested parameters.
4757
4758    for (size_t i = 0; i < mHwModules.size(); i++)
4759    {
4760        if (mHwModules[i]->mHandle == 0) {
4761            continue;
4762        }
4763        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
4764        {
4765            sp<IOProfile> profile = mHwModules[i]->mInputProfiles[j];
4766            // profile->log();
4767            if (profile->isCompatibleProfile(device, samplingRate,
4768                                             &samplingRate /*updatedSamplingRate*/,
4769                                             format, channelMask, (audio_output_flags_t) flags)) {
4770                return profile;
4771            }
4772        }
4773    }
4774    return NULL;
4775}
4776
4777audio_devices_t AudioPolicyManager::getDeviceForInputSource(audio_source_t inputSource)
4778{
4779    uint32_t device = AUDIO_DEVICE_NONE;
4780    audio_devices_t availableDeviceTypes = mAvailableInputDevices.types() &
4781                                            ~AUDIO_DEVICE_BIT_IN;
4782    switch (inputSource) {
4783    case AUDIO_SOURCE_VOICE_UPLINK:
4784      if (availableDeviceTypes & AUDIO_DEVICE_IN_VOICE_CALL) {
4785          device = AUDIO_DEVICE_IN_VOICE_CALL;
4786          break;
4787      }
4788      break;
4789
4790    case AUDIO_SOURCE_DEFAULT:
4791    case AUDIO_SOURCE_MIC:
4792    if (availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_A2DP) {
4793        device = AUDIO_DEVICE_IN_BLUETOOTH_A2DP;
4794    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
4795        device = AUDIO_DEVICE_IN_WIRED_HEADSET;
4796    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
4797        device = AUDIO_DEVICE_IN_USB_DEVICE;
4798    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4799        device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4800    }
4801    break;
4802
4803    case AUDIO_SOURCE_VOICE_COMMUNICATION:
4804        // Allow only use of devices on primary input if in call and HAL does not support routing
4805        // to voice call path.
4806        if ((mPhoneState == AUDIO_MODE_IN_CALL) &&
4807                (mAvailableOutputDevices.types() & AUDIO_DEVICE_OUT_TELEPHONY_TX) == 0) {
4808            availableDeviceTypes = availablePrimaryInputDevices() & ~AUDIO_DEVICE_BIT_IN;
4809        }
4810
4811        switch (mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]) {
4812        case AUDIO_POLICY_FORCE_BT_SCO:
4813            // if SCO device is requested but no SCO device is available, fall back to default case
4814            if (availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) {
4815                device = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET;
4816                break;
4817            }
4818            // FALL THROUGH
4819
4820        default:    // FORCE_NONE
4821            if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
4822                device = AUDIO_DEVICE_IN_WIRED_HEADSET;
4823            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
4824                device = AUDIO_DEVICE_IN_USB_DEVICE;
4825            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4826                device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4827            }
4828            break;
4829
4830        case AUDIO_POLICY_FORCE_SPEAKER:
4831            if (availableDeviceTypes & AUDIO_DEVICE_IN_BACK_MIC) {
4832                device = AUDIO_DEVICE_IN_BACK_MIC;
4833            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4834                device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4835            }
4836            break;
4837        }
4838        break;
4839
4840    case AUDIO_SOURCE_VOICE_RECOGNITION:
4841    case AUDIO_SOURCE_HOTWORD:
4842        if (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] == AUDIO_POLICY_FORCE_BT_SCO &&
4843                availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) {
4844            device = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET;
4845        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
4846            device = AUDIO_DEVICE_IN_WIRED_HEADSET;
4847        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
4848            device = AUDIO_DEVICE_IN_USB_DEVICE;
4849        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4850            device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4851        }
4852        break;
4853    case AUDIO_SOURCE_CAMCORDER:
4854        if (availableDeviceTypes & AUDIO_DEVICE_IN_BACK_MIC) {
4855            device = AUDIO_DEVICE_IN_BACK_MIC;
4856        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4857            device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4858        }
4859        break;
4860    case AUDIO_SOURCE_VOICE_DOWNLINK:
4861    case AUDIO_SOURCE_VOICE_CALL:
4862        if (availableDeviceTypes & AUDIO_DEVICE_IN_VOICE_CALL) {
4863            device = AUDIO_DEVICE_IN_VOICE_CALL;
4864        }
4865        break;
4866    case AUDIO_SOURCE_REMOTE_SUBMIX:
4867        if (availableDeviceTypes & AUDIO_DEVICE_IN_REMOTE_SUBMIX) {
4868            device = AUDIO_DEVICE_IN_REMOTE_SUBMIX;
4869        }
4870        break;
4871     case AUDIO_SOURCE_FM_TUNER:
4872        if (availableDeviceTypes & AUDIO_DEVICE_IN_FM_TUNER) {
4873            device = AUDIO_DEVICE_IN_FM_TUNER;
4874        }
4875        break;
4876    default:
4877        ALOGW("getDeviceForInputSource() invalid input source %d", inputSource);
4878        break;
4879    }
4880    ALOGV("getDeviceForInputSource()input source %d, device %08x", inputSource, device);
4881    return device;
4882}
4883
4884bool AudioPolicyManager::isVirtualInputDevice(audio_devices_t device)
4885{
4886    if ((device & AUDIO_DEVICE_BIT_IN) != 0) {
4887        device &= ~AUDIO_DEVICE_BIT_IN;
4888        if ((popcount(device) == 1) && ((device & ~APM_AUDIO_IN_DEVICE_VIRTUAL_ALL) == 0))
4889            return true;
4890    }
4891    return false;
4892}
4893
4894bool AudioPolicyManager::deviceDistinguishesOnAddress(audio_devices_t device) {
4895    return ((device & APM_AUDIO_DEVICE_MATCH_ADDRESS_ALL) != 0);
4896}
4897
4898audio_io_handle_t AudioPolicyManager::getActiveInput(bool ignoreVirtualInputs)
4899{
4900    for (size_t i = 0; i < mInputs.size(); i++) {
4901        const sp<AudioInputDescriptor>  input_descriptor = mInputs.valueAt(i);
4902        if ((input_descriptor->mRefCount > 0)
4903                && (!ignoreVirtualInputs || !isVirtualInputDevice(input_descriptor->mDevice))) {
4904            return mInputs.keyAt(i);
4905        }
4906    }
4907    return 0;
4908}
4909
4910uint32_t AudioPolicyManager::activeInputsCount() const
4911{
4912    uint32_t count = 0;
4913    for (size_t i = 0; i < mInputs.size(); i++) {
4914        const sp<AudioInputDescriptor>  desc = mInputs.valueAt(i);
4915        if (desc->mRefCount > 0) {
4916            return count++;
4917        }
4918    }
4919    return count;
4920}
4921
4922
4923audio_devices_t AudioPolicyManager::getDeviceForVolume(audio_devices_t device)
4924{
4925    if (device == AUDIO_DEVICE_NONE) {
4926        // this happens when forcing a route update and no track is active on an output.
4927        // In this case the returned category is not important.
4928        device =  AUDIO_DEVICE_OUT_SPEAKER;
4929    } else if (popcount(device) > 1) {
4930        // Multiple device selection is either:
4931        //  - speaker + one other device: give priority to speaker in this case.
4932        //  - one A2DP device + another device: happens with duplicated output. In this case
4933        // retain the device on the A2DP output as the other must not correspond to an active
4934        // selection if not the speaker.
4935        //  - HDMI-CEC system audio mode only output: give priority to available item in order.
4936        if (device & AUDIO_DEVICE_OUT_SPEAKER) {
4937            device = AUDIO_DEVICE_OUT_SPEAKER;
4938        } else if (device & AUDIO_DEVICE_OUT_HDMI_ARC) {
4939            device = AUDIO_DEVICE_OUT_HDMI_ARC;
4940        } else if (device & AUDIO_DEVICE_OUT_AUX_LINE) {
4941            device = AUDIO_DEVICE_OUT_AUX_LINE;
4942        } else if (device & AUDIO_DEVICE_OUT_SPDIF) {
4943            device = AUDIO_DEVICE_OUT_SPDIF;
4944        } else {
4945            device = (audio_devices_t)(device & AUDIO_DEVICE_OUT_ALL_A2DP);
4946        }
4947    }
4948
4949    /*SPEAKER_SAFE is an alias of SPEAKER for purposes of volume control*/
4950    if (device == AUDIO_DEVICE_OUT_SPEAKER_SAFE)
4951        device = AUDIO_DEVICE_OUT_SPEAKER;
4952
4953    ALOGW_IF(popcount(device) != 1,
4954            "getDeviceForVolume() invalid device combination: %08x",
4955            device);
4956
4957    return device;
4958}
4959
4960AudioPolicyManager::device_category AudioPolicyManager::getDeviceCategory(audio_devices_t device)
4961{
4962    switch(getDeviceForVolume(device)) {
4963        case AUDIO_DEVICE_OUT_EARPIECE:
4964            return DEVICE_CATEGORY_EARPIECE;
4965        case AUDIO_DEVICE_OUT_WIRED_HEADSET:
4966        case AUDIO_DEVICE_OUT_WIRED_HEADPHONE:
4967        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO:
4968        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET:
4969        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP:
4970        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES:
4971            return DEVICE_CATEGORY_HEADSET;
4972        case AUDIO_DEVICE_OUT_LINE:
4973        case AUDIO_DEVICE_OUT_AUX_DIGITAL:
4974        /*USB?  Remote submix?*/
4975            return DEVICE_CATEGORY_EXT_MEDIA;
4976        case AUDIO_DEVICE_OUT_SPEAKER:
4977        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT:
4978        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER:
4979        case AUDIO_DEVICE_OUT_USB_ACCESSORY:
4980        case AUDIO_DEVICE_OUT_USB_DEVICE:
4981        case AUDIO_DEVICE_OUT_REMOTE_SUBMIX:
4982        default:
4983            return DEVICE_CATEGORY_SPEAKER;
4984    }
4985}
4986
4987/* static */
4988float AudioPolicyManager::volIndexToAmpl(audio_devices_t device, const StreamDescriptor& streamDesc,
4989        int indexInUi)
4990{
4991    device_category deviceCategory = getDeviceCategory(device);
4992    const VolumeCurvePoint *curve = streamDesc.mVolumeCurve[deviceCategory];
4993
4994    // the volume index in the UI is relative to the min and max volume indices for this stream type
4995    int nbSteps = 1 + curve[VOLMAX].mIndex -
4996            curve[VOLMIN].mIndex;
4997    int volIdx = (nbSteps * (indexInUi - streamDesc.mIndexMin)) /
4998            (streamDesc.mIndexMax - streamDesc.mIndexMin);
4999
5000    // find what part of the curve this index volume belongs to, or if it's out of bounds
5001    int segment = 0;
5002    if (volIdx < curve[VOLMIN].mIndex) {         // out of bounds
5003        return 0.0f;
5004    } else if (volIdx < curve[VOLKNEE1].mIndex) {
5005        segment = 0;
5006    } else if (volIdx < curve[VOLKNEE2].mIndex) {
5007        segment = 1;
5008    } else if (volIdx <= curve[VOLMAX].mIndex) {
5009        segment = 2;
5010    } else {                                                               // out of bounds
5011        return 1.0f;
5012    }
5013
5014    // linear interpolation in the attenuation table in dB
5015    float decibels = curve[segment].mDBAttenuation +
5016            ((float)(volIdx - curve[segment].mIndex)) *
5017                ( (curve[segment+1].mDBAttenuation -
5018                        curve[segment].mDBAttenuation) /
5019                    ((float)(curve[segment+1].mIndex -
5020                            curve[segment].mIndex)) );
5021
5022    float amplification = exp( decibels * 0.115129f); // exp( dB * ln(10) / 20 )
5023
5024    ALOGVV("VOLUME vol index=[%d %d %d], dB=[%.1f %.1f %.1f] ampl=%.5f",
5025            curve[segment].mIndex, volIdx,
5026            curve[segment+1].mIndex,
5027            curve[segment].mDBAttenuation,
5028            decibels,
5029            curve[segment+1].mDBAttenuation,
5030            amplification);
5031
5032    return amplification;
5033}
5034
5035const AudioPolicyManager::VolumeCurvePoint
5036    AudioPolicyManager::sDefaultVolumeCurve[AudioPolicyManager::VOLCNT] = {
5037    {1, -49.5f}, {33, -33.5f}, {66, -17.0f}, {100, 0.0f}
5038};
5039
5040const AudioPolicyManager::VolumeCurvePoint
5041    AudioPolicyManager::sDefaultMediaVolumeCurve[AudioPolicyManager::VOLCNT] = {
5042    {1, -58.0f}, {20, -40.0f}, {60, -17.0f}, {100, 0.0f}
5043};
5044
5045const AudioPolicyManager::VolumeCurvePoint
5046    AudioPolicyManager::sExtMediaSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
5047    {1, -58.0f}, {20, -40.0f}, {60, -21.0f}, {100, -10.0f}
5048};
5049
5050const AudioPolicyManager::VolumeCurvePoint
5051    AudioPolicyManager::sSpeakerMediaVolumeCurve[AudioPolicyManager::VOLCNT] = {
5052    {1, -56.0f}, {20, -34.0f}, {60, -11.0f}, {100, 0.0f}
5053};
5054
5055const AudioPolicyManager::VolumeCurvePoint
5056    AudioPolicyManager::sSpeakerMediaVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
5057    {1, -55.0f}, {20, -43.0f}, {86, -12.0f}, {100, 0.0f}
5058};
5059
5060const AudioPolicyManager::VolumeCurvePoint
5061    AudioPolicyManager::sSpeakerSonificationVolumeCurve[AudioPolicyManager::VOLCNT] = {
5062    {1, -29.7f}, {33, -20.1f}, {66, -10.2f}, {100, 0.0f}
5063};
5064
5065const AudioPolicyManager::VolumeCurvePoint
5066    AudioPolicyManager::sSpeakerSonificationVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
5067    {1, -35.7f}, {33, -26.1f}, {66, -13.2f}, {100, 0.0f}
5068};
5069
5070// AUDIO_STREAM_SYSTEM, AUDIO_STREAM_ENFORCED_AUDIBLE and AUDIO_STREAM_DTMF volume tracks
5071// AUDIO_STREAM_RING on phones and AUDIO_STREAM_MUSIC on tablets.
5072// AUDIO_STREAM_DTMF tracks AUDIO_STREAM_VOICE_CALL while in call (See AudioService.java).
5073// The range is constrained between -24dB and -6dB over speaker and -30dB and -18dB over headset.
5074
5075const AudioPolicyManager::VolumeCurvePoint
5076    AudioPolicyManager::sDefaultSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
5077    {1, -24.0f}, {33, -18.0f}, {66, -12.0f}, {100, -6.0f}
5078};
5079
5080const AudioPolicyManager::VolumeCurvePoint
5081    AudioPolicyManager::sDefaultSystemVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
5082    {1, -34.0f}, {33, -24.0f}, {66, -15.0f}, {100, -6.0f}
5083};
5084
5085const AudioPolicyManager::VolumeCurvePoint
5086    AudioPolicyManager::sHeadsetSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
5087    {1, -30.0f}, {33, -26.0f}, {66, -22.0f}, {100, -18.0f}
5088};
5089
5090const AudioPolicyManager::VolumeCurvePoint
5091    AudioPolicyManager::sDefaultVoiceVolumeCurve[AudioPolicyManager::VOLCNT] = {
5092    {0, -42.0f}, {33, -28.0f}, {66, -14.0f}, {100, 0.0f}
5093};
5094
5095const AudioPolicyManager::VolumeCurvePoint
5096    AudioPolicyManager::sSpeakerVoiceVolumeCurve[AudioPolicyManager::VOLCNT] = {
5097    {0, -24.0f}, {33, -16.0f}, {66, -8.0f}, {100, 0.0f}
5098};
5099
5100const AudioPolicyManager::VolumeCurvePoint
5101    AudioPolicyManager::sLinearVolumeCurve[AudioPolicyManager::VOLCNT] = {
5102    {0, -96.0f}, {33, -68.0f}, {66, -34.0f}, {100, 0.0f}
5103};
5104
5105const AudioPolicyManager::VolumeCurvePoint
5106    AudioPolicyManager::sSilentVolumeCurve[AudioPolicyManager::VOLCNT] = {
5107    {0, -96.0f}, {1, -96.0f}, {2, -96.0f}, {100, -96.0f}
5108};
5109
5110const AudioPolicyManager::VolumeCurvePoint
5111    AudioPolicyManager::sFullScaleVolumeCurve[AudioPolicyManager::VOLCNT] = {
5112    {0, 0.0f}, {1, 0.0f}, {2, 0.0f}, {100, 0.0f}
5113};
5114
5115const AudioPolicyManager::VolumeCurvePoint
5116            *AudioPolicyManager::sVolumeProfiles[AUDIO_STREAM_CNT]
5117                                                   [AudioPolicyManager::DEVICE_CATEGORY_CNT] = {
5118    { // AUDIO_STREAM_VOICE_CALL
5119        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_HEADSET
5120        sSpeakerVoiceVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5121        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5122        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5123    },
5124    { // AUDIO_STREAM_SYSTEM
5125        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
5126        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5127        sDefaultSystemVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
5128        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5129    },
5130    { // AUDIO_STREAM_RING
5131        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
5132        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5133        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
5134        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5135    },
5136    { // AUDIO_STREAM_MUSIC
5137        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
5138        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5139        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5140        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5141    },
5142    { // AUDIO_STREAM_ALARM
5143        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
5144        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5145        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
5146        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5147    },
5148    { // AUDIO_STREAM_NOTIFICATION
5149        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
5150        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5151        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
5152        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5153    },
5154    { // AUDIO_STREAM_BLUETOOTH_SCO
5155        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_HEADSET
5156        sSpeakerVoiceVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5157        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5158        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5159    },
5160    { // AUDIO_STREAM_ENFORCED_AUDIBLE
5161        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
5162        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5163        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5164        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5165    },
5166    {  // AUDIO_STREAM_DTMF
5167        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
5168        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5169        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5170        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5171    },
5172    { // AUDIO_STREAM_TTS
5173      // "Transmitted Through Speaker": always silent except on DEVICE_CATEGORY_SPEAKER
5174        sSilentVolumeCurve, // DEVICE_CATEGORY_HEADSET
5175        sLinearVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5176        sSilentVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5177        sSilentVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5178    },
5179    { // AUDIO_STREAM_ACCESSIBILITY
5180        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
5181        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5182        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5183        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5184    },
5185    { // AUDIO_STREAM_REROUTING
5186        sFullScaleVolumeCurve, // DEVICE_CATEGORY_HEADSET
5187        sFullScaleVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5188        sFullScaleVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5189        sFullScaleVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5190    },
5191    { // AUDIO_STREAM_PATCH
5192        sFullScaleVolumeCurve, // DEVICE_CATEGORY_HEADSET
5193        sFullScaleVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5194        sFullScaleVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5195        sFullScaleVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5196    },
5197};
5198
5199void AudioPolicyManager::initializeVolumeCurves()
5200{
5201    for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
5202        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
5203            mStreams[i].mVolumeCurve[j] =
5204                    sVolumeProfiles[i][j];
5205        }
5206    }
5207
5208    // Check availability of DRC on speaker path: if available, override some of the speaker curves
5209    if (mSpeakerDrcEnabled) {
5210        mStreams[AUDIO_STREAM_SYSTEM].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5211                sDefaultSystemVolumeCurveDrc;
5212        mStreams[AUDIO_STREAM_RING].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5213                sSpeakerSonificationVolumeCurveDrc;
5214        mStreams[AUDIO_STREAM_ALARM].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5215                sSpeakerSonificationVolumeCurveDrc;
5216        mStreams[AUDIO_STREAM_NOTIFICATION].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5217                sSpeakerSonificationVolumeCurveDrc;
5218        mStreams[AUDIO_STREAM_MUSIC].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5219                sSpeakerMediaVolumeCurveDrc;
5220        mStreams[AUDIO_STREAM_ACCESSIBILITY].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5221                sSpeakerMediaVolumeCurveDrc;
5222    }
5223}
5224
5225float AudioPolicyManager::computeVolume(audio_stream_type_t stream,
5226                                            int index,
5227                                            audio_io_handle_t output,
5228                                            audio_devices_t device)
5229{
5230    float volume = 1.0;
5231    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
5232    StreamDescriptor &streamDesc = mStreams[stream];
5233
5234    if (device == AUDIO_DEVICE_NONE) {
5235        device = outputDesc->device();
5236    }
5237
5238    volume = volIndexToAmpl(device, streamDesc, index);
5239
5240    // if a headset is connected, apply the following rules to ring tones and notifications
5241    // to avoid sound level bursts in user's ears:
5242    // - always attenuate ring tones and notifications volume by 6dB
5243    // - if music is playing, always limit the volume to current music volume,
5244    // with a minimum threshold at -36dB so that notification is always perceived.
5245    const routing_strategy stream_strategy = getStrategy(stream);
5246    if ((device & (AUDIO_DEVICE_OUT_BLUETOOTH_A2DP |
5247            AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES |
5248            AUDIO_DEVICE_OUT_WIRED_HEADSET |
5249            AUDIO_DEVICE_OUT_WIRED_HEADPHONE)) &&
5250        ((stream_strategy == STRATEGY_SONIFICATION)
5251                || (stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL)
5252                || (stream == AUDIO_STREAM_SYSTEM)
5253                || ((stream_strategy == STRATEGY_ENFORCED_AUDIBLE) &&
5254                    (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_NONE))) &&
5255        streamDesc.mCanBeMuted) {
5256        volume *= SONIFICATION_HEADSET_VOLUME_FACTOR;
5257        // when the phone is ringing we must consider that music could have been paused just before
5258        // by the music application and behave as if music was active if the last music track was
5259        // just stopped
5260        if (isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY) ||
5261                mLimitRingtoneVolume) {
5262            audio_devices_t musicDevice = getDeviceForStrategy(STRATEGY_MEDIA, true /*fromCache*/);
5263            float musicVol = computeVolume(AUDIO_STREAM_MUSIC,
5264                               mStreams[AUDIO_STREAM_MUSIC].getVolumeIndex(musicDevice),
5265                               output,
5266                               musicDevice);
5267            float minVol = (musicVol > SONIFICATION_HEADSET_VOLUME_MIN) ?
5268                                musicVol : SONIFICATION_HEADSET_VOLUME_MIN;
5269            if (volume > minVol) {
5270                volume = minVol;
5271                ALOGV("computeVolume limiting volume to %f musicVol %f", minVol, musicVol);
5272            }
5273        }
5274    }
5275
5276    return volume;
5277}
5278
5279status_t AudioPolicyManager::checkAndSetVolume(audio_stream_type_t stream,
5280                                                   int index,
5281                                                   audio_io_handle_t output,
5282                                                   audio_devices_t device,
5283                                                   int delayMs,
5284                                                   bool force)
5285{
5286
5287    // do not change actual stream volume if the stream is muted
5288    if (mOutputs.valueFor(output)->mMuteCount[stream] != 0) {
5289        ALOGVV("checkAndSetVolume() stream %d muted count %d",
5290              stream, mOutputs.valueFor(output)->mMuteCount[stream]);
5291        return NO_ERROR;
5292    }
5293
5294    // do not change in call volume if bluetooth is connected and vice versa
5295    if ((stream == AUDIO_STREAM_VOICE_CALL &&
5296            mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] == AUDIO_POLICY_FORCE_BT_SCO) ||
5297        (stream == AUDIO_STREAM_BLUETOOTH_SCO &&
5298                mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] != AUDIO_POLICY_FORCE_BT_SCO)) {
5299        ALOGV("checkAndSetVolume() cannot set stream %d volume with force use = %d for comm",
5300             stream, mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]);
5301        return INVALID_OPERATION;
5302    }
5303
5304    float volume = computeVolume(stream, index, output, device);
5305    // We actually change the volume if:
5306    // - the float value returned by computeVolume() changed
5307    // - the force flag is set
5308    if (volume != mOutputs.valueFor(output)->mCurVolume[stream] ||
5309            force) {
5310        mOutputs.valueFor(output)->mCurVolume[stream] = volume;
5311        ALOGVV("checkAndSetVolume() for output %d stream %d, volume %f, delay %d", output, stream, volume, delayMs);
5312        // Force VOICE_CALL to track BLUETOOTH_SCO stream volume when bluetooth audio is
5313        // enabled
5314        if (stream == AUDIO_STREAM_BLUETOOTH_SCO) {
5315            mpClientInterface->setStreamVolume(AUDIO_STREAM_VOICE_CALL, volume, output, delayMs);
5316        }
5317        mpClientInterface->setStreamVolume(stream, volume, output, delayMs);
5318    }
5319
5320    if (stream == AUDIO_STREAM_VOICE_CALL ||
5321        stream == AUDIO_STREAM_BLUETOOTH_SCO) {
5322        float voiceVolume;
5323        // Force voice volume to max for bluetooth SCO as volume is managed by the headset
5324        if (stream == AUDIO_STREAM_VOICE_CALL) {
5325            voiceVolume = (float)index/(float)mStreams[stream].mIndexMax;
5326        } else {
5327            voiceVolume = 1.0;
5328        }
5329
5330        if (voiceVolume != mLastVoiceVolume && output == mPrimaryOutput) {
5331            mpClientInterface->setVoiceVolume(voiceVolume, delayMs);
5332            mLastVoiceVolume = voiceVolume;
5333        }
5334    }
5335
5336    return NO_ERROR;
5337}
5338
5339void AudioPolicyManager::applyStreamVolumes(audio_io_handle_t output,
5340                                                audio_devices_t device,
5341                                                int delayMs,
5342                                                bool force)
5343{
5344    ALOGVV("applyStreamVolumes() for output %d and device %x", output, device);
5345
5346    for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
5347        if (stream == AUDIO_STREAM_PATCH) {
5348            continue;
5349        }
5350        checkAndSetVolume((audio_stream_type_t)stream,
5351                          mStreams[stream].getVolumeIndex(device),
5352                          output,
5353                          device,
5354                          delayMs,
5355                          force);
5356    }
5357}
5358
5359void AudioPolicyManager::setStrategyMute(routing_strategy strategy,
5360                                             bool on,
5361                                             audio_io_handle_t output,
5362                                             int delayMs,
5363                                             audio_devices_t device)
5364{
5365    ALOGVV("setStrategyMute() strategy %d, mute %d, output %d", strategy, on, output);
5366    for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
5367        if (stream == AUDIO_STREAM_PATCH) {
5368            continue;
5369        }
5370        if (getStrategy((audio_stream_type_t)stream) == strategy) {
5371            setStreamMute((audio_stream_type_t)stream, on, output, delayMs, device);
5372        }
5373    }
5374}
5375
5376void AudioPolicyManager::setStreamMute(audio_stream_type_t stream,
5377                                           bool on,
5378                                           audio_io_handle_t output,
5379                                           int delayMs,
5380                                           audio_devices_t device)
5381{
5382    StreamDescriptor &streamDesc = mStreams[stream];
5383    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
5384    if (device == AUDIO_DEVICE_NONE) {
5385        device = outputDesc->device();
5386    }
5387
5388    ALOGVV("setStreamMute() stream %d, mute %d, output %d, mMuteCount %d device %04x",
5389          stream, on, output, outputDesc->mMuteCount[stream], device);
5390
5391    if (on) {
5392        if (outputDesc->mMuteCount[stream] == 0) {
5393            if (streamDesc.mCanBeMuted &&
5394                    ((stream != AUDIO_STREAM_ENFORCED_AUDIBLE) ||
5395                     (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_NONE))) {
5396                checkAndSetVolume(stream, 0, output, device, delayMs);
5397            }
5398        }
5399        // increment mMuteCount after calling checkAndSetVolume() so that volume change is not ignored
5400        outputDesc->mMuteCount[stream]++;
5401    } else {
5402        if (outputDesc->mMuteCount[stream] == 0) {
5403            ALOGV("setStreamMute() unmuting non muted stream!");
5404            return;
5405        }
5406        if (--outputDesc->mMuteCount[stream] == 0) {
5407            checkAndSetVolume(stream,
5408                              streamDesc.getVolumeIndex(device),
5409                              output,
5410                              device,
5411                              delayMs);
5412        }
5413    }
5414}
5415
5416void AudioPolicyManager::handleIncallSonification(audio_stream_type_t stream,
5417                                                      bool starting, bool stateChange)
5418{
5419    // if the stream pertains to sonification strategy and we are in call we must
5420    // mute the stream if it is low visibility. If it is high visibility, we must play a tone
5421    // in the device used for phone strategy and play the tone if the selected device does not
5422    // interfere with the device used for phone strategy
5423    // if stateChange is true, we are called from setPhoneState() and we must mute or unmute as
5424    // many times as there are active tracks on the output
5425    const routing_strategy stream_strategy = getStrategy(stream);
5426    if ((stream_strategy == STRATEGY_SONIFICATION) ||
5427            ((stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL))) {
5428        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
5429        ALOGV("handleIncallSonification() stream %d starting %d device %x stateChange %d",
5430                stream, starting, outputDesc->mDevice, stateChange);
5431        if (outputDesc->mRefCount[stream]) {
5432            int muteCount = 1;
5433            if (stateChange) {
5434                muteCount = outputDesc->mRefCount[stream];
5435            }
5436            if (audio_is_low_visibility(stream)) {
5437                ALOGV("handleIncallSonification() low visibility, muteCount %d", muteCount);
5438                for (int i = 0; i < muteCount; i++) {
5439                    setStreamMute(stream, starting, mPrimaryOutput);
5440                }
5441            } else {
5442                ALOGV("handleIncallSonification() high visibility");
5443                if (outputDesc->device() &
5444                        getDeviceForStrategy(STRATEGY_PHONE, true /*fromCache*/)) {
5445                    ALOGV("handleIncallSonification() high visibility muted, muteCount %d", muteCount);
5446                    for (int i = 0; i < muteCount; i++) {
5447                        setStreamMute(stream, starting, mPrimaryOutput);
5448                    }
5449                }
5450                if (starting) {
5451                    mpClientInterface->startTone(AUDIO_POLICY_TONE_IN_CALL_NOTIFICATION,
5452                                                 AUDIO_STREAM_VOICE_CALL);
5453                } else {
5454                    mpClientInterface->stopTone();
5455                }
5456            }
5457        }
5458    }
5459}
5460
5461bool AudioPolicyManager::isInCall()
5462{
5463    return isStateInCall(mPhoneState);
5464}
5465
5466bool AudioPolicyManager::isStateInCall(int state) {
5467    return ((state == AUDIO_MODE_IN_CALL) ||
5468            (state == AUDIO_MODE_IN_COMMUNICATION));
5469}
5470
5471uint32_t AudioPolicyManager::getMaxEffectsCpuLoad()
5472{
5473    return MAX_EFFECTS_CPU_LOAD;
5474}
5475
5476uint32_t AudioPolicyManager::getMaxEffectsMemory()
5477{
5478    return MAX_EFFECTS_MEMORY;
5479}
5480
5481
5482// --- AudioOutputDescriptor class implementation
5483
5484AudioPolicyManager::AudioOutputDescriptor::AudioOutputDescriptor(
5485        const sp<IOProfile>& profile)
5486    : mId(0), mIoHandle(0), mLatency(0),
5487    mFlags((audio_output_flags_t)0), mDevice(AUDIO_DEVICE_NONE), mPatchHandle(0),
5488    mOutput1(0), mOutput2(0), mProfile(profile), mDirectOpenCount(0)
5489{
5490    // clear usage count for all stream types
5491    for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
5492        mRefCount[i] = 0;
5493        mCurVolume[i] = -1.0;
5494        mMuteCount[i] = 0;
5495        mStopTime[i] = 0;
5496    }
5497    for (int i = 0; i < NUM_STRATEGIES; i++) {
5498        mStrategyMutedByDevice[i] = false;
5499    }
5500    if (profile != NULL) {
5501        mFlags = (audio_output_flags_t)profile->mFlags;
5502        mSamplingRate = profile->pickSamplingRate();
5503        mFormat = profile->pickFormat();
5504        mChannelMask = profile->pickChannelMask();
5505        if (profile->mGains.size() > 0) {
5506            profile->mGains[0]->getDefaultConfig(&mGain);
5507        }
5508    }
5509}
5510
5511audio_devices_t AudioPolicyManager::AudioOutputDescriptor::device() const
5512{
5513    if (isDuplicated()) {
5514        return (audio_devices_t)(mOutput1->mDevice | mOutput2->mDevice);
5515    } else {
5516        return mDevice;
5517    }
5518}
5519
5520uint32_t AudioPolicyManager::AudioOutputDescriptor::latency()
5521{
5522    if (isDuplicated()) {
5523        return (mOutput1->mLatency > mOutput2->mLatency) ? mOutput1->mLatency : mOutput2->mLatency;
5524    } else {
5525        return mLatency;
5526    }
5527}
5528
5529bool AudioPolicyManager::AudioOutputDescriptor::sharesHwModuleWith(
5530        const sp<AudioOutputDescriptor> outputDesc)
5531{
5532    if (isDuplicated()) {
5533        return mOutput1->sharesHwModuleWith(outputDesc) || mOutput2->sharesHwModuleWith(outputDesc);
5534    } else if (outputDesc->isDuplicated()){
5535        return sharesHwModuleWith(outputDesc->mOutput1) || sharesHwModuleWith(outputDesc->mOutput2);
5536    } else {
5537        return (mProfile->mModule == outputDesc->mProfile->mModule);
5538    }
5539}
5540
5541void AudioPolicyManager::AudioOutputDescriptor::changeRefCount(audio_stream_type_t stream,
5542                                                                   int delta)
5543{
5544    // forward usage count change to attached outputs
5545    if (isDuplicated()) {
5546        mOutput1->changeRefCount(stream, delta);
5547        mOutput2->changeRefCount(stream, delta);
5548    }
5549    if ((delta + (int)mRefCount[stream]) < 0) {
5550        ALOGW("changeRefCount() invalid delta %d for stream %d, refCount %d",
5551              delta, stream, mRefCount[stream]);
5552        mRefCount[stream] = 0;
5553        return;
5554    }
5555    mRefCount[stream] += delta;
5556    ALOGV("changeRefCount() stream %d, count %d", stream, mRefCount[stream]);
5557}
5558
5559audio_devices_t AudioPolicyManager::AudioOutputDescriptor::supportedDevices()
5560{
5561    if (isDuplicated()) {
5562        return (audio_devices_t)(mOutput1->supportedDevices() | mOutput2->supportedDevices());
5563    } else {
5564        return mProfile->mSupportedDevices.types() ;
5565    }
5566}
5567
5568bool AudioPolicyManager::AudioOutputDescriptor::isActive(uint32_t inPastMs) const
5569{
5570    return isStrategyActive(NUM_STRATEGIES, inPastMs);
5571}
5572
5573bool AudioPolicyManager::AudioOutputDescriptor::isStrategyActive(routing_strategy strategy,
5574                                                                       uint32_t inPastMs,
5575                                                                       nsecs_t sysTime) const
5576{
5577    if ((sysTime == 0) && (inPastMs != 0)) {
5578        sysTime = systemTime();
5579    }
5580    for (int i = 0; i < (int)AUDIO_STREAM_CNT; i++) {
5581        if (i == AUDIO_STREAM_PATCH) {
5582            continue;
5583        }
5584        if (((getStrategy((audio_stream_type_t)i) == strategy) ||
5585                (NUM_STRATEGIES == strategy)) &&
5586                isStreamActive((audio_stream_type_t)i, inPastMs, sysTime)) {
5587            return true;
5588        }
5589    }
5590    return false;
5591}
5592
5593bool AudioPolicyManager::AudioOutputDescriptor::isStreamActive(audio_stream_type_t stream,
5594                                                                       uint32_t inPastMs,
5595                                                                       nsecs_t sysTime) const
5596{
5597    if (mRefCount[stream] != 0) {
5598        return true;
5599    }
5600    if (inPastMs == 0) {
5601        return false;
5602    }
5603    if (sysTime == 0) {
5604        sysTime = systemTime();
5605    }
5606    if (ns2ms(sysTime - mStopTime[stream]) < inPastMs) {
5607        return true;
5608    }
5609    return false;
5610}
5611
5612void AudioPolicyManager::AudioOutputDescriptor::toAudioPortConfig(
5613                                                 struct audio_port_config *dstConfig,
5614                                                 const struct audio_port_config *srcConfig) const
5615{
5616    ALOG_ASSERT(!isDuplicated(), "toAudioPortConfig() called on duplicated output %d", mIoHandle);
5617
5618    dstConfig->config_mask = AUDIO_PORT_CONFIG_SAMPLE_RATE|AUDIO_PORT_CONFIG_CHANNEL_MASK|
5619                            AUDIO_PORT_CONFIG_FORMAT|AUDIO_PORT_CONFIG_GAIN;
5620    if (srcConfig != NULL) {
5621        dstConfig->config_mask |= srcConfig->config_mask;
5622    }
5623    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
5624
5625    dstConfig->id = mId;
5626    dstConfig->role = AUDIO_PORT_ROLE_SOURCE;
5627    dstConfig->type = AUDIO_PORT_TYPE_MIX;
5628    dstConfig->ext.mix.hw_module = mProfile->mModule->mHandle;
5629    dstConfig->ext.mix.handle = mIoHandle;
5630    dstConfig->ext.mix.usecase.stream = AUDIO_STREAM_DEFAULT;
5631}
5632
5633void AudioPolicyManager::AudioOutputDescriptor::toAudioPort(
5634                                                    struct audio_port *port) const
5635{
5636    ALOG_ASSERT(!isDuplicated(), "toAudioPort() called on duplicated output %d", mIoHandle);
5637    mProfile->toAudioPort(port);
5638    port->id = mId;
5639    toAudioPortConfig(&port->active_config);
5640    port->ext.mix.hw_module = mProfile->mModule->mHandle;
5641    port->ext.mix.handle = mIoHandle;
5642    port->ext.mix.latency_class =
5643            mFlags & AUDIO_OUTPUT_FLAG_FAST ? AUDIO_LATENCY_LOW : AUDIO_LATENCY_NORMAL;
5644}
5645
5646status_t AudioPolicyManager::AudioOutputDescriptor::dump(int fd)
5647{
5648    const size_t SIZE = 256;
5649    char buffer[SIZE];
5650    String8 result;
5651
5652    snprintf(buffer, SIZE, " ID: %d\n", mId);
5653    result.append(buffer);
5654    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
5655    result.append(buffer);
5656    snprintf(buffer, SIZE, " Format: %08x\n", mFormat);
5657    result.append(buffer);
5658    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
5659    result.append(buffer);
5660    snprintf(buffer, SIZE, " Latency: %d\n", mLatency);
5661    result.append(buffer);
5662    snprintf(buffer, SIZE, " Flags %08x\n", mFlags);
5663    result.append(buffer);
5664    snprintf(buffer, SIZE, " Devices %08x\n", device());
5665    result.append(buffer);
5666    snprintf(buffer, SIZE, " Stream volume refCount muteCount\n");
5667    result.append(buffer);
5668    for (int i = 0; i < (int)AUDIO_STREAM_CNT; i++) {
5669        snprintf(buffer, SIZE, " %02d     %.03f     %02d       %02d\n",
5670                 i, mCurVolume[i], mRefCount[i], mMuteCount[i]);
5671        result.append(buffer);
5672    }
5673    write(fd, result.string(), result.size());
5674
5675    return NO_ERROR;
5676}
5677
5678// --- AudioInputDescriptor class implementation
5679
5680AudioPolicyManager::AudioInputDescriptor::AudioInputDescriptor(const sp<IOProfile>& profile)
5681    : mId(0), mIoHandle(0),
5682      mDevice(AUDIO_DEVICE_NONE), mPatchHandle(0), mRefCount(0),
5683      mInputSource(AUDIO_SOURCE_DEFAULT), mProfile(profile), mIsSoundTrigger(false)
5684{
5685    if (profile != NULL) {
5686        mSamplingRate = profile->pickSamplingRate();
5687        mFormat = profile->pickFormat();
5688        mChannelMask = profile->pickChannelMask();
5689        if (profile->mGains.size() > 0) {
5690            profile->mGains[0]->getDefaultConfig(&mGain);
5691        }
5692    }
5693}
5694
5695void AudioPolicyManager::AudioInputDescriptor::toAudioPortConfig(
5696                                                   struct audio_port_config *dstConfig,
5697                                                   const struct audio_port_config *srcConfig) const
5698{
5699    ALOG_ASSERT(mProfile != 0,
5700                "toAudioPortConfig() called on input with null profile %d", mIoHandle);
5701    dstConfig->config_mask = AUDIO_PORT_CONFIG_SAMPLE_RATE|AUDIO_PORT_CONFIG_CHANNEL_MASK|
5702                            AUDIO_PORT_CONFIG_FORMAT|AUDIO_PORT_CONFIG_GAIN;
5703    if (srcConfig != NULL) {
5704        dstConfig->config_mask |= srcConfig->config_mask;
5705    }
5706
5707    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
5708
5709    dstConfig->id = mId;
5710    dstConfig->role = AUDIO_PORT_ROLE_SINK;
5711    dstConfig->type = AUDIO_PORT_TYPE_MIX;
5712    dstConfig->ext.mix.hw_module = mProfile->mModule->mHandle;
5713    dstConfig->ext.mix.handle = mIoHandle;
5714    dstConfig->ext.mix.usecase.source = mInputSource;
5715}
5716
5717void AudioPolicyManager::AudioInputDescriptor::toAudioPort(
5718                                                    struct audio_port *port) const
5719{
5720    ALOG_ASSERT(mProfile != 0, "toAudioPort() called on input with null profile %d", mIoHandle);
5721
5722    mProfile->toAudioPort(port);
5723    port->id = mId;
5724    toAudioPortConfig(&port->active_config);
5725    port->ext.mix.hw_module = mProfile->mModule->mHandle;
5726    port->ext.mix.handle = mIoHandle;
5727    port->ext.mix.latency_class = AUDIO_LATENCY_NORMAL;
5728}
5729
5730status_t AudioPolicyManager::AudioInputDescriptor::dump(int fd)
5731{
5732    const size_t SIZE = 256;
5733    char buffer[SIZE];
5734    String8 result;
5735
5736    snprintf(buffer, SIZE, " ID: %d\n", mId);
5737    result.append(buffer);
5738    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
5739    result.append(buffer);
5740    snprintf(buffer, SIZE, " Format: %d\n", mFormat);
5741    result.append(buffer);
5742    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
5743    result.append(buffer);
5744    snprintf(buffer, SIZE, " Devices %08x\n", mDevice);
5745    result.append(buffer);
5746    snprintf(buffer, SIZE, " Ref Count %d\n", mRefCount);
5747    result.append(buffer);
5748    snprintf(buffer, SIZE, " Open Ref Count %d\n", mOpenRefCount);
5749    result.append(buffer);
5750
5751    write(fd, result.string(), result.size());
5752
5753    return NO_ERROR;
5754}
5755
5756// --- StreamDescriptor class implementation
5757
5758AudioPolicyManager::StreamDescriptor::StreamDescriptor()
5759    :   mIndexMin(0), mIndexMax(1), mCanBeMuted(true)
5760{
5761    mIndexCur.add(AUDIO_DEVICE_OUT_DEFAULT, 0);
5762}
5763
5764int AudioPolicyManager::StreamDescriptor::getVolumeIndex(audio_devices_t device)
5765{
5766    device = AudioPolicyManager::getDeviceForVolume(device);
5767    // there is always a valid entry for AUDIO_DEVICE_OUT_DEFAULT
5768    if (mIndexCur.indexOfKey(device) < 0) {
5769        device = AUDIO_DEVICE_OUT_DEFAULT;
5770    }
5771    return mIndexCur.valueFor(device);
5772}
5773
5774void AudioPolicyManager::StreamDescriptor::dump(int fd)
5775{
5776    const size_t SIZE = 256;
5777    char buffer[SIZE];
5778    String8 result;
5779
5780    snprintf(buffer, SIZE, "%s         %02d         %02d         ",
5781             mCanBeMuted ? "true " : "false", mIndexMin, mIndexMax);
5782    result.append(buffer);
5783    for (size_t i = 0; i < mIndexCur.size(); i++) {
5784        snprintf(buffer, SIZE, "%04x : %02d, ",
5785                 mIndexCur.keyAt(i),
5786                 mIndexCur.valueAt(i));
5787        result.append(buffer);
5788    }
5789    result.append("\n");
5790
5791    write(fd, result.string(), result.size());
5792}
5793
5794// --- EffectDescriptor class implementation
5795
5796status_t AudioPolicyManager::EffectDescriptor::dump(int fd)
5797{
5798    const size_t SIZE = 256;
5799    char buffer[SIZE];
5800    String8 result;
5801
5802    snprintf(buffer, SIZE, " I/O: %d\n", mIo);
5803    result.append(buffer);
5804    snprintf(buffer, SIZE, " Strategy: %d\n", mStrategy);
5805    result.append(buffer);
5806    snprintf(buffer, SIZE, " Session: %d\n", mSession);
5807    result.append(buffer);
5808    snprintf(buffer, SIZE, " Name: %s\n",  mDesc.name);
5809    result.append(buffer);
5810    snprintf(buffer, SIZE, " %s\n",  mEnabled ? "Enabled" : "Disabled");
5811    result.append(buffer);
5812    write(fd, result.string(), result.size());
5813
5814    return NO_ERROR;
5815}
5816
5817// --- HwModule class implementation
5818
5819AudioPolicyManager::HwModule::HwModule(const char *name)
5820    : mName(strndup(name, AUDIO_HARDWARE_MODULE_ID_MAX_LEN)),
5821      mHalVersion(AUDIO_DEVICE_API_VERSION_MIN), mHandle(0)
5822{
5823}
5824
5825AudioPolicyManager::HwModule::~HwModule()
5826{
5827    for (size_t i = 0; i < mOutputProfiles.size(); i++) {
5828        mOutputProfiles[i]->mSupportedDevices.clear();
5829    }
5830    for (size_t i = 0; i < mInputProfiles.size(); i++) {
5831        mInputProfiles[i]->mSupportedDevices.clear();
5832    }
5833    free((void *)mName);
5834}
5835
5836status_t AudioPolicyManager::HwModule::loadInput(cnode *root)
5837{
5838    cnode *node = root->first_child;
5839
5840    sp<IOProfile> profile = new IOProfile(String8(root->name), AUDIO_PORT_ROLE_SINK, this);
5841
5842    while (node) {
5843        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
5844            profile->loadSamplingRates((char *)node->value);
5845        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
5846            profile->loadFormats((char *)node->value);
5847        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
5848            profile->loadInChannels((char *)node->value);
5849        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
5850            profile->mSupportedDevices.loadDevicesFromName((char *)node->value,
5851                                                           mDeclaredDevices);
5852        } else if (strcmp(node->name, FLAGS_TAG) == 0) {
5853            profile->mFlags = parseInputFlagNames((char *)node->value);
5854        } else if (strcmp(node->name, GAINS_TAG) == 0) {
5855            profile->loadGains(node);
5856        }
5857        node = node->next;
5858    }
5859    ALOGW_IF(profile->mSupportedDevices.isEmpty(),
5860            "loadInput() invalid supported devices");
5861    ALOGW_IF(profile->mChannelMasks.size() == 0,
5862            "loadInput() invalid supported channel masks");
5863    ALOGW_IF(profile->mSamplingRates.size() == 0,
5864            "loadInput() invalid supported sampling rates");
5865    ALOGW_IF(profile->mFormats.size() == 0,
5866            "loadInput() invalid supported formats");
5867    if (!profile->mSupportedDevices.isEmpty() &&
5868            (profile->mChannelMasks.size() != 0) &&
5869            (profile->mSamplingRates.size() != 0) &&
5870            (profile->mFormats.size() != 0)) {
5871
5872        ALOGV("loadInput() adding input Supported Devices %04x",
5873              profile->mSupportedDevices.types());
5874
5875        mInputProfiles.add(profile);
5876        return NO_ERROR;
5877    } else {
5878        return BAD_VALUE;
5879    }
5880}
5881
5882status_t AudioPolicyManager::HwModule::loadOutput(cnode *root)
5883{
5884    cnode *node = root->first_child;
5885
5886    sp<IOProfile> profile = new IOProfile(String8(root->name), AUDIO_PORT_ROLE_SOURCE, this);
5887
5888    while (node) {
5889        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
5890            profile->loadSamplingRates((char *)node->value);
5891        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
5892            profile->loadFormats((char *)node->value);
5893        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
5894            profile->loadOutChannels((char *)node->value);
5895        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
5896            profile->mSupportedDevices.loadDevicesFromName((char *)node->value,
5897                                                           mDeclaredDevices);
5898        } else if (strcmp(node->name, FLAGS_TAG) == 0) {
5899            profile->mFlags = parseOutputFlagNames((char *)node->value);
5900        } else if (strcmp(node->name, GAINS_TAG) == 0) {
5901            profile->loadGains(node);
5902        }
5903        node = node->next;
5904    }
5905    ALOGW_IF(profile->mSupportedDevices.isEmpty(),
5906            "loadOutput() invalid supported devices");
5907    ALOGW_IF(profile->mChannelMasks.size() == 0,
5908            "loadOutput() invalid supported channel masks");
5909    ALOGW_IF(profile->mSamplingRates.size() == 0,
5910            "loadOutput() invalid supported sampling rates");
5911    ALOGW_IF(profile->mFormats.size() == 0,
5912            "loadOutput() invalid supported formats");
5913    if (!profile->mSupportedDevices.isEmpty() &&
5914            (profile->mChannelMasks.size() != 0) &&
5915            (profile->mSamplingRates.size() != 0) &&
5916            (profile->mFormats.size() != 0)) {
5917
5918        ALOGV("loadOutput() adding output Supported Devices %04x, mFlags %04x",
5919              profile->mSupportedDevices.types(), profile->mFlags);
5920
5921        mOutputProfiles.add(profile);
5922        return NO_ERROR;
5923    } else {
5924        return BAD_VALUE;
5925    }
5926}
5927
5928status_t AudioPolicyManager::HwModule::loadDevice(cnode *root)
5929{
5930    cnode *node = root->first_child;
5931
5932    audio_devices_t type = AUDIO_DEVICE_NONE;
5933    while (node) {
5934        if (strcmp(node->name, DEVICE_TYPE) == 0) {
5935            type = parseDeviceNames((char *)node->value);
5936            break;
5937        }
5938        node = node->next;
5939    }
5940    if (type == AUDIO_DEVICE_NONE ||
5941            (!audio_is_input_device(type) && !audio_is_output_device(type))) {
5942        ALOGW("loadDevice() bad type %08x", type);
5943        return BAD_VALUE;
5944    }
5945    sp<DeviceDescriptor> deviceDesc = new DeviceDescriptor(String8(root->name), type);
5946    deviceDesc->mModule = this;
5947
5948    node = root->first_child;
5949    while (node) {
5950        if (strcmp(node->name, DEVICE_ADDRESS) == 0) {
5951            deviceDesc->mAddress = String8((char *)node->value);
5952        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
5953            if (audio_is_input_device(type)) {
5954                deviceDesc->loadInChannels((char *)node->value);
5955            } else {
5956                deviceDesc->loadOutChannels((char *)node->value);
5957            }
5958        } else if (strcmp(node->name, GAINS_TAG) == 0) {
5959            deviceDesc->loadGains(node);
5960        }
5961        node = node->next;
5962    }
5963
5964    ALOGV("loadDevice() adding device name %s type %08x address %s",
5965          deviceDesc->mName.string(), type, deviceDesc->mAddress.string());
5966
5967    mDeclaredDevices.add(deviceDesc);
5968
5969    return NO_ERROR;
5970}
5971
5972void AudioPolicyManager::HwModule::dump(int fd)
5973{
5974    const size_t SIZE = 256;
5975    char buffer[SIZE];
5976    String8 result;
5977
5978    snprintf(buffer, SIZE, "  - name: %s\n", mName);
5979    result.append(buffer);
5980    snprintf(buffer, SIZE, "  - handle: %d\n", mHandle);
5981    result.append(buffer);
5982    snprintf(buffer, SIZE, "  - version: %u.%u\n", mHalVersion >> 8, mHalVersion & 0xFF);
5983    result.append(buffer);
5984    write(fd, result.string(), result.size());
5985    if (mOutputProfiles.size()) {
5986        write(fd, "  - outputs:\n", strlen("  - outputs:\n"));
5987        for (size_t i = 0; i < mOutputProfiles.size(); i++) {
5988            snprintf(buffer, SIZE, "    output %zu:\n", i);
5989            write(fd, buffer, strlen(buffer));
5990            mOutputProfiles[i]->dump(fd);
5991        }
5992    }
5993    if (mInputProfiles.size()) {
5994        write(fd, "  - inputs:\n", strlen("  - inputs:\n"));
5995        for (size_t i = 0; i < mInputProfiles.size(); i++) {
5996            snprintf(buffer, SIZE, "    input %zu:\n", i);
5997            write(fd, buffer, strlen(buffer));
5998            mInputProfiles[i]->dump(fd);
5999        }
6000    }
6001    if (mDeclaredDevices.size()) {
6002        write(fd, "  - devices:\n", strlen("  - devices:\n"));
6003        for (size_t i = 0; i < mDeclaredDevices.size(); i++) {
6004            mDeclaredDevices[i]->dump(fd, 4, i);
6005        }
6006    }
6007}
6008
6009// --- AudioPort class implementation
6010
6011
6012AudioPolicyManager::AudioPort::AudioPort(const String8& name, audio_port_type_t type,
6013          audio_port_role_t role, const sp<HwModule>& module) :
6014    mName(name), mType(type), mRole(role), mModule(module), mFlags(0)
6015{
6016    mUseInChannelMask = ((type == AUDIO_PORT_TYPE_DEVICE) && (role == AUDIO_PORT_ROLE_SOURCE)) ||
6017                    ((type == AUDIO_PORT_TYPE_MIX) && (role == AUDIO_PORT_ROLE_SINK));
6018}
6019
6020void AudioPolicyManager::AudioPort::toAudioPort(struct audio_port *port) const
6021{
6022    port->role = mRole;
6023    port->type = mType;
6024    unsigned int i;
6025    for (i = 0; i < mSamplingRates.size() && i < AUDIO_PORT_MAX_SAMPLING_RATES; i++) {
6026        if (mSamplingRates[i] != 0) {
6027            port->sample_rates[i] = mSamplingRates[i];
6028        }
6029    }
6030    port->num_sample_rates = i;
6031    for (i = 0; i < mChannelMasks.size() && i < AUDIO_PORT_MAX_CHANNEL_MASKS; i++) {
6032        if (mChannelMasks[i] != 0) {
6033            port->channel_masks[i] = mChannelMasks[i];
6034        }
6035    }
6036    port->num_channel_masks = i;
6037    for (i = 0; i < mFormats.size() && i < AUDIO_PORT_MAX_FORMATS; i++) {
6038        if (mFormats[i] != 0) {
6039            port->formats[i] = mFormats[i];
6040        }
6041    }
6042    port->num_formats = i;
6043
6044    ALOGV("AudioPort::toAudioPort() num gains %zu", mGains.size());
6045
6046    for (i = 0; i < mGains.size() && i < AUDIO_PORT_MAX_GAINS; i++) {
6047        port->gains[i] = mGains[i]->mGain;
6048    }
6049    port->num_gains = i;
6050}
6051
6052void AudioPolicyManager::AudioPort::importAudioPort(const sp<AudioPort> port) {
6053    for (size_t k = 0 ; k < port->mSamplingRates.size() ; k++) {
6054        const uint32_t rate = port->mSamplingRates.itemAt(k);
6055        if (rate != 0) { // skip "dynamic" rates
6056            bool hasRate = false;
6057            for (size_t l = 0 ; l < mSamplingRates.size() ; l++) {
6058                if (rate == mSamplingRates.itemAt(l)) {
6059                    hasRate = true;
6060                    break;
6061                }
6062            }
6063            if (!hasRate) { // never import a sampling rate twice
6064                mSamplingRates.add(rate);
6065            }
6066        }
6067    }
6068    for (size_t k = 0 ; k < port->mChannelMasks.size() ; k++) {
6069        const audio_channel_mask_t mask = port->mChannelMasks.itemAt(k);
6070        if (mask != 0) { // skip "dynamic" masks
6071            bool hasMask = false;
6072            for (size_t l = 0 ; l < mChannelMasks.size() ; l++) {
6073                if (mask == mChannelMasks.itemAt(l)) {
6074                    hasMask = true;
6075                    break;
6076                }
6077            }
6078            if (!hasMask) { // never import a channel mask twice
6079                mChannelMasks.add(mask);
6080            }
6081        }
6082    }
6083    for (size_t k = 0 ; k < port->mFormats.size() ; k++) {
6084        const audio_format_t format = port->mFormats.itemAt(k);
6085        if (format != 0) { // skip "dynamic" formats
6086            bool hasFormat = false;
6087            for (size_t l = 0 ; l < mFormats.size() ; l++) {
6088                if (format == mFormats.itemAt(l)) {
6089                    hasFormat = true;
6090                    break;
6091                }
6092            }
6093            if (!hasFormat) { // never import a channel mask twice
6094                mFormats.add(format);
6095            }
6096        }
6097    }
6098    for (size_t k = 0 ; k < port->mGains.size() ; k++) {
6099        sp<AudioGain> gain = port->mGains.itemAt(k);
6100        if (gain != 0) {
6101            bool hasGain = false;
6102            for (size_t l = 0 ; l < mGains.size() ; l++) {
6103                if (gain == mGains.itemAt(l)) {
6104                    hasGain = true;
6105                    break;
6106                }
6107            }
6108            if (!hasGain) { // never import a gain twice
6109                mGains.add(gain);
6110            }
6111        }
6112    }
6113}
6114
6115void AudioPolicyManager::AudioPort::clearCapabilities() {
6116    mChannelMasks.clear();
6117    mFormats.clear();
6118    mSamplingRates.clear();
6119    mGains.clear();
6120}
6121
6122void AudioPolicyManager::AudioPort::loadSamplingRates(char *name)
6123{
6124    char *str = strtok(name, "|");
6125
6126    // by convention, "0' in the first entry in mSamplingRates indicates the supported sampling
6127    // rates should be read from the output stream after it is opened for the first time
6128    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
6129        mSamplingRates.add(0);
6130        return;
6131    }
6132
6133    while (str != NULL) {
6134        uint32_t rate = atoi(str);
6135        if (rate != 0) {
6136            ALOGV("loadSamplingRates() adding rate %d", rate);
6137            mSamplingRates.add(rate);
6138        }
6139        str = strtok(NULL, "|");
6140    }
6141}
6142
6143void AudioPolicyManager::AudioPort::loadFormats(char *name)
6144{
6145    char *str = strtok(name, "|");
6146
6147    // by convention, "0' in the first entry in mFormats indicates the supported formats
6148    // should be read from the output stream after it is opened for the first time
6149    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
6150        mFormats.add(AUDIO_FORMAT_DEFAULT);
6151        return;
6152    }
6153
6154    while (str != NULL) {
6155        audio_format_t format = (audio_format_t)stringToEnum(sFormatNameToEnumTable,
6156                                                             ARRAY_SIZE(sFormatNameToEnumTable),
6157                                                             str);
6158        if (format != AUDIO_FORMAT_DEFAULT) {
6159            mFormats.add(format);
6160        }
6161        str = strtok(NULL, "|");
6162    }
6163}
6164
6165void AudioPolicyManager::AudioPort::loadInChannels(char *name)
6166{
6167    const char *str = strtok(name, "|");
6168
6169    ALOGV("loadInChannels() %s", name);
6170
6171    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
6172        mChannelMasks.add(0);
6173        return;
6174    }
6175
6176    while (str != NULL) {
6177        audio_channel_mask_t channelMask =
6178                (audio_channel_mask_t)stringToEnum(sInChannelsNameToEnumTable,
6179                                                   ARRAY_SIZE(sInChannelsNameToEnumTable),
6180                                                   str);
6181        if (channelMask != 0) {
6182            ALOGV("loadInChannels() adding channelMask %04x", channelMask);
6183            mChannelMasks.add(channelMask);
6184        }
6185        str = strtok(NULL, "|");
6186    }
6187}
6188
6189void AudioPolicyManager::AudioPort::loadOutChannels(char *name)
6190{
6191    const char *str = strtok(name, "|");
6192
6193    ALOGV("loadOutChannels() %s", name);
6194
6195    // by convention, "0' in the first entry in mChannelMasks indicates the supported channel
6196    // masks should be read from the output stream after it is opened for the first time
6197    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
6198        mChannelMasks.add(0);
6199        return;
6200    }
6201
6202    while (str != NULL) {
6203        audio_channel_mask_t channelMask =
6204                (audio_channel_mask_t)stringToEnum(sOutChannelsNameToEnumTable,
6205                                                   ARRAY_SIZE(sOutChannelsNameToEnumTable),
6206                                                   str);
6207        if (channelMask != 0) {
6208            mChannelMasks.add(channelMask);
6209        }
6210        str = strtok(NULL, "|");
6211    }
6212    return;
6213}
6214
6215audio_gain_mode_t AudioPolicyManager::AudioPort::loadGainMode(char *name)
6216{
6217    const char *str = strtok(name, "|");
6218
6219    ALOGV("loadGainMode() %s", name);
6220    audio_gain_mode_t mode = 0;
6221    while (str != NULL) {
6222        mode |= (audio_gain_mode_t)stringToEnum(sGainModeNameToEnumTable,
6223                                                ARRAY_SIZE(sGainModeNameToEnumTable),
6224                                                str);
6225        str = strtok(NULL, "|");
6226    }
6227    return mode;
6228}
6229
6230void AudioPolicyManager::AudioPort::loadGain(cnode *root, int index)
6231{
6232    cnode *node = root->first_child;
6233
6234    sp<AudioGain> gain = new AudioGain(index, mUseInChannelMask);
6235
6236    while (node) {
6237        if (strcmp(node->name, GAIN_MODE) == 0) {
6238            gain->mGain.mode = loadGainMode((char *)node->value);
6239        } else if (strcmp(node->name, GAIN_CHANNELS) == 0) {
6240            if (mUseInChannelMask) {
6241                gain->mGain.channel_mask =
6242                        (audio_channel_mask_t)stringToEnum(sInChannelsNameToEnumTable,
6243                                                           ARRAY_SIZE(sInChannelsNameToEnumTable),
6244                                                           (char *)node->value);
6245            } else {
6246                gain->mGain.channel_mask =
6247                        (audio_channel_mask_t)stringToEnum(sOutChannelsNameToEnumTable,
6248                                                           ARRAY_SIZE(sOutChannelsNameToEnumTable),
6249                                                           (char *)node->value);
6250            }
6251        } else if (strcmp(node->name, GAIN_MIN_VALUE) == 0) {
6252            gain->mGain.min_value = atoi((char *)node->value);
6253        } else if (strcmp(node->name, GAIN_MAX_VALUE) == 0) {
6254            gain->mGain.max_value = atoi((char *)node->value);
6255        } else if (strcmp(node->name, GAIN_DEFAULT_VALUE) == 0) {
6256            gain->mGain.default_value = atoi((char *)node->value);
6257        } else if (strcmp(node->name, GAIN_STEP_VALUE) == 0) {
6258            gain->mGain.step_value = atoi((char *)node->value);
6259        } else if (strcmp(node->name, GAIN_MIN_RAMP_MS) == 0) {
6260            gain->mGain.min_ramp_ms = atoi((char *)node->value);
6261        } else if (strcmp(node->name, GAIN_MAX_RAMP_MS) == 0) {
6262            gain->mGain.max_ramp_ms = atoi((char *)node->value);
6263        }
6264        node = node->next;
6265    }
6266
6267    ALOGV("loadGain() adding new gain mode %08x channel mask %08x min mB %d max mB %d",
6268          gain->mGain.mode, gain->mGain.channel_mask, gain->mGain.min_value, gain->mGain.max_value);
6269
6270    if (gain->mGain.mode == 0) {
6271        return;
6272    }
6273    mGains.add(gain);
6274}
6275
6276void AudioPolicyManager::AudioPort::loadGains(cnode *root)
6277{
6278    cnode *node = root->first_child;
6279    int index = 0;
6280    while (node) {
6281        ALOGV("loadGains() loading gain %s", node->name);
6282        loadGain(node, index++);
6283        node = node->next;
6284    }
6285}
6286
6287status_t AudioPolicyManager::AudioPort::checkExactSamplingRate(uint32_t samplingRate) const
6288{
6289    for (size_t i = 0; i < mSamplingRates.size(); i ++) {
6290        if (mSamplingRates[i] == samplingRate) {
6291            return NO_ERROR;
6292        }
6293    }
6294    return BAD_VALUE;
6295}
6296
6297status_t AudioPolicyManager::AudioPort::checkCompatibleSamplingRate(uint32_t samplingRate,
6298        uint32_t *updatedSamplingRate) const
6299{
6300    // Search for the closest supported sampling rate that is above (preferred)
6301    // or below (acceptable) the desired sampling rate, within a permitted ratio.
6302    // The sampling rates do not need to be sorted in ascending order.
6303    ssize_t maxBelow = -1;
6304    ssize_t minAbove = -1;
6305    uint32_t candidate;
6306    for (size_t i = 0; i < mSamplingRates.size(); i++) {
6307        candidate = mSamplingRates[i];
6308        if (candidate == samplingRate) {
6309            if (updatedSamplingRate != NULL) {
6310                *updatedSamplingRate = candidate;
6311            }
6312            return NO_ERROR;
6313        }
6314        // candidate < desired
6315        if (candidate < samplingRate) {
6316            if (maxBelow < 0 || candidate > mSamplingRates[maxBelow]) {
6317                maxBelow = i;
6318            }
6319        // candidate > desired
6320        } else {
6321            if (minAbove < 0 || candidate < mSamplingRates[minAbove]) {
6322                minAbove = i;
6323            }
6324        }
6325    }
6326    // This uses hard-coded knowledge about AudioFlinger resampling ratios.
6327    // TODO Move these assumptions out.
6328    static const uint32_t kMaxDownSampleRatio = 6;  // beyond this aliasing occurs
6329    static const uint32_t kMaxUpSampleRatio = 256;  // beyond this sample rate inaccuracies occur
6330                                                    // due to approximation by an int32_t of the
6331                                                    // phase increments
6332    // Prefer to down-sample from a higher sampling rate, as we get the desired frequency spectrum.
6333    if (minAbove >= 0) {
6334        candidate = mSamplingRates[minAbove];
6335        if (candidate / kMaxDownSampleRatio <= samplingRate) {
6336            if (updatedSamplingRate != NULL) {
6337                *updatedSamplingRate = candidate;
6338            }
6339            return NO_ERROR;
6340        }
6341    }
6342    // But if we have to up-sample from a lower sampling rate, that's OK.
6343    if (maxBelow >= 0) {
6344        candidate = mSamplingRates[maxBelow];
6345        if (candidate * kMaxUpSampleRatio >= samplingRate) {
6346            if (updatedSamplingRate != NULL) {
6347                *updatedSamplingRate = candidate;
6348            }
6349            return NO_ERROR;
6350        }
6351    }
6352    // leave updatedSamplingRate unmodified
6353    return BAD_VALUE;
6354}
6355
6356status_t AudioPolicyManager::AudioPort::checkExactChannelMask(audio_channel_mask_t channelMask) const
6357{
6358    for (size_t i = 0; i < mChannelMasks.size(); i++) {
6359        if (mChannelMasks[i] == channelMask) {
6360            return NO_ERROR;
6361        }
6362    }
6363    return BAD_VALUE;
6364}
6365
6366status_t AudioPolicyManager::AudioPort::checkCompatibleChannelMask(audio_channel_mask_t channelMask)
6367        const
6368{
6369    const bool isRecordThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SINK;
6370    for (size_t i = 0; i < mChannelMasks.size(); i ++) {
6371        // FIXME Does not handle multi-channel automatic conversions yet
6372        audio_channel_mask_t supported = mChannelMasks[i];
6373        if (supported == channelMask) {
6374            return NO_ERROR;
6375        }
6376        if (isRecordThread) {
6377            // This uses hard-coded knowledge that AudioFlinger can silently down-mix and up-mix.
6378            // FIXME Abstract this out to a table.
6379            if (((supported == AUDIO_CHANNEL_IN_FRONT_BACK || supported == AUDIO_CHANNEL_IN_STEREO)
6380                    && channelMask == AUDIO_CHANNEL_IN_MONO) ||
6381                (supported == AUDIO_CHANNEL_IN_MONO && (channelMask == AUDIO_CHANNEL_IN_FRONT_BACK
6382                    || channelMask == AUDIO_CHANNEL_IN_STEREO))) {
6383                return NO_ERROR;
6384            }
6385        }
6386    }
6387    return BAD_VALUE;
6388}
6389
6390status_t AudioPolicyManager::AudioPort::checkFormat(audio_format_t format) const
6391{
6392    for (size_t i = 0; i < mFormats.size(); i ++) {
6393        if (mFormats[i] == format) {
6394            return NO_ERROR;
6395        }
6396    }
6397    return BAD_VALUE;
6398}
6399
6400
6401uint32_t AudioPolicyManager::AudioPort::pickSamplingRate() const
6402{
6403    // special case for uninitialized dynamic profile
6404    if (mSamplingRates.size() == 1 && mSamplingRates[0] == 0) {
6405        return 0;
6406    }
6407
6408    // For direct outputs, pick minimum sampling rate: this helps ensuring that the
6409    // channel count / sampling rate combination chosen will be supported by the connected
6410    // sink
6411    if ((mType == AUDIO_PORT_TYPE_MIX) && (mRole == AUDIO_PORT_ROLE_SOURCE) &&
6412            (mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD))) {
6413        uint32_t samplingRate = UINT_MAX;
6414        for (size_t i = 0; i < mSamplingRates.size(); i ++) {
6415            if ((mSamplingRates[i] < samplingRate) && (mSamplingRates[i] > 0)) {
6416                samplingRate = mSamplingRates[i];
6417            }
6418        }
6419        return (samplingRate == UINT_MAX) ? 0 : samplingRate;
6420    }
6421
6422    uint32_t samplingRate = 0;
6423    uint32_t maxRate = MAX_MIXER_SAMPLING_RATE;
6424
6425    // For mixed output and inputs, use max mixer sampling rates. Do not
6426    // limit sampling rate otherwise
6427    if (mType != AUDIO_PORT_TYPE_MIX) {
6428        maxRate = UINT_MAX;
6429    }
6430    for (size_t i = 0; i < mSamplingRates.size(); i ++) {
6431        if ((mSamplingRates[i] > samplingRate) && (mSamplingRates[i] <= maxRate)) {
6432            samplingRate = mSamplingRates[i];
6433        }
6434    }
6435    return samplingRate;
6436}
6437
6438audio_channel_mask_t AudioPolicyManager::AudioPort::pickChannelMask() const
6439{
6440    // special case for uninitialized dynamic profile
6441    if (mChannelMasks.size() == 1 && mChannelMasks[0] == 0) {
6442        return AUDIO_CHANNEL_NONE;
6443    }
6444    audio_channel_mask_t channelMask = AUDIO_CHANNEL_NONE;
6445
6446    // For direct outputs, pick minimum channel count: this helps ensuring that the
6447    // channel count / sampling rate combination chosen will be supported by the connected
6448    // sink
6449    if ((mType == AUDIO_PORT_TYPE_MIX) && (mRole == AUDIO_PORT_ROLE_SOURCE) &&
6450            (mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD))) {
6451        uint32_t channelCount = UINT_MAX;
6452        for (size_t i = 0; i < mChannelMasks.size(); i ++) {
6453            uint32_t cnlCount;
6454            if (mUseInChannelMask) {
6455                cnlCount = audio_channel_count_from_in_mask(mChannelMasks[i]);
6456            } else {
6457                cnlCount = audio_channel_count_from_out_mask(mChannelMasks[i]);
6458            }
6459            if ((cnlCount < channelCount) && (cnlCount > 0)) {
6460                channelMask = mChannelMasks[i];
6461                channelCount = cnlCount;
6462            }
6463        }
6464        return channelMask;
6465    }
6466
6467    uint32_t channelCount = 0;
6468    uint32_t maxCount = MAX_MIXER_CHANNEL_COUNT;
6469
6470    // For mixed output and inputs, use max mixer channel count. Do not
6471    // limit channel count otherwise
6472    if (mType != AUDIO_PORT_TYPE_MIX) {
6473        maxCount = UINT_MAX;
6474    }
6475    for (size_t i = 0; i < mChannelMasks.size(); i ++) {
6476        uint32_t cnlCount;
6477        if (mUseInChannelMask) {
6478            cnlCount = audio_channel_count_from_in_mask(mChannelMasks[i]);
6479        } else {
6480            cnlCount = audio_channel_count_from_out_mask(mChannelMasks[i]);
6481        }
6482        if ((cnlCount > channelCount) && (cnlCount <= maxCount)) {
6483            channelMask = mChannelMasks[i];
6484            channelCount = cnlCount;
6485        }
6486    }
6487    return channelMask;
6488}
6489
6490/* format in order of increasing preference */
6491const audio_format_t AudioPolicyManager::AudioPort::sPcmFormatCompareTable[] = {
6492        AUDIO_FORMAT_DEFAULT,
6493        AUDIO_FORMAT_PCM_16_BIT,
6494        AUDIO_FORMAT_PCM_8_24_BIT,
6495        AUDIO_FORMAT_PCM_24_BIT_PACKED,
6496        AUDIO_FORMAT_PCM_32_BIT,
6497        AUDIO_FORMAT_PCM_FLOAT,
6498};
6499
6500int AudioPolicyManager::AudioPort::compareFormats(audio_format_t format1,
6501                                                  audio_format_t format2)
6502{
6503    // NOTE: AUDIO_FORMAT_INVALID is also considered not PCM and will be compared equal to any
6504    // compressed format and better than any PCM format. This is by design of pickFormat()
6505    if (!audio_is_linear_pcm(format1)) {
6506        if (!audio_is_linear_pcm(format2)) {
6507            return 0;
6508        }
6509        return 1;
6510    }
6511    if (!audio_is_linear_pcm(format2)) {
6512        return -1;
6513    }
6514
6515    int index1 = -1, index2 = -1;
6516    for (size_t i = 0;
6517            (i < ARRAY_SIZE(sPcmFormatCompareTable)) && ((index1 == -1) || (index2 == -1));
6518            i ++) {
6519        if (sPcmFormatCompareTable[i] == format1) {
6520            index1 = i;
6521        }
6522        if (sPcmFormatCompareTable[i] == format2) {
6523            index2 = i;
6524        }
6525    }
6526    // format1 not found => index1 < 0 => format2 > format1
6527    // format2 not found => index2 < 0 => format2 < format1
6528    return index1 - index2;
6529}
6530
6531audio_format_t AudioPolicyManager::AudioPort::pickFormat() const
6532{
6533    // special case for uninitialized dynamic profile
6534    if (mFormats.size() == 1 && mFormats[0] == 0) {
6535        return AUDIO_FORMAT_DEFAULT;
6536    }
6537
6538    audio_format_t format = AUDIO_FORMAT_DEFAULT;
6539    audio_format_t bestFormat =
6540            AudioPolicyManager::AudioPort::sPcmFormatCompareTable[
6541                ARRAY_SIZE(AudioPolicyManager::AudioPort::sPcmFormatCompareTable) - 1];
6542    // For mixed output and inputs, use best mixer output format. Do not
6543    // limit format otherwise
6544    if ((mType != AUDIO_PORT_TYPE_MIX) ||
6545            ((mRole == AUDIO_PORT_ROLE_SOURCE) &&
6546             (((mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD)) != 0)))) {
6547        bestFormat = AUDIO_FORMAT_INVALID;
6548    }
6549
6550    for (size_t i = 0; i < mFormats.size(); i ++) {
6551        if ((compareFormats(mFormats[i], format) > 0) &&
6552                (compareFormats(mFormats[i], bestFormat) <= 0)) {
6553            format = mFormats[i];
6554        }
6555    }
6556    return format;
6557}
6558
6559status_t AudioPolicyManager::AudioPort::checkGain(const struct audio_gain_config *gainConfig,
6560                                                  int index) const
6561{
6562    if (index < 0 || (size_t)index >= mGains.size()) {
6563        return BAD_VALUE;
6564    }
6565    return mGains[index]->checkConfig(gainConfig);
6566}
6567
6568void AudioPolicyManager::AudioPort::dump(int fd, int spaces) const
6569{
6570    const size_t SIZE = 256;
6571    char buffer[SIZE];
6572    String8 result;
6573
6574    if (mName.size() != 0) {
6575        snprintf(buffer, SIZE, "%*s- name: %s\n", spaces, "", mName.string());
6576        result.append(buffer);
6577    }
6578
6579    if (mSamplingRates.size() != 0) {
6580        snprintf(buffer, SIZE, "%*s- sampling rates: ", spaces, "");
6581        result.append(buffer);
6582        for (size_t i = 0; i < mSamplingRates.size(); i++) {
6583            if (i == 0 && mSamplingRates[i] == 0) {
6584                snprintf(buffer, SIZE, "Dynamic");
6585            } else {
6586                snprintf(buffer, SIZE, "%d", mSamplingRates[i]);
6587            }
6588            result.append(buffer);
6589            result.append(i == (mSamplingRates.size() - 1) ? "" : ", ");
6590        }
6591        result.append("\n");
6592    }
6593
6594    if (mChannelMasks.size() != 0) {
6595        snprintf(buffer, SIZE, "%*s- channel masks: ", spaces, "");
6596        result.append(buffer);
6597        for (size_t i = 0; i < mChannelMasks.size(); i++) {
6598            ALOGV("AudioPort::dump mChannelMasks %zu %08x", i, mChannelMasks[i]);
6599
6600            if (i == 0 && mChannelMasks[i] == 0) {
6601                snprintf(buffer, SIZE, "Dynamic");
6602            } else {
6603                snprintf(buffer, SIZE, "0x%04x", mChannelMasks[i]);
6604            }
6605            result.append(buffer);
6606            result.append(i == (mChannelMasks.size() - 1) ? "" : ", ");
6607        }
6608        result.append("\n");
6609    }
6610
6611    if (mFormats.size() != 0) {
6612        snprintf(buffer, SIZE, "%*s- formats: ", spaces, "");
6613        result.append(buffer);
6614        for (size_t i = 0; i < mFormats.size(); i++) {
6615            const char *formatStr = enumToString(sFormatNameToEnumTable,
6616                                                 ARRAY_SIZE(sFormatNameToEnumTable),
6617                                                 mFormats[i]);
6618            if (i == 0 && strcmp(formatStr, "") == 0) {
6619                snprintf(buffer, SIZE, "Dynamic");
6620            } else {
6621                snprintf(buffer, SIZE, "%s", formatStr);
6622            }
6623            result.append(buffer);
6624            result.append(i == (mFormats.size() - 1) ? "" : ", ");
6625        }
6626        result.append("\n");
6627    }
6628    write(fd, result.string(), result.size());
6629    if (mGains.size() != 0) {
6630        snprintf(buffer, SIZE, "%*s- gains:\n", spaces, "");
6631        write(fd, buffer, strlen(buffer) + 1);
6632        result.append(buffer);
6633        for (size_t i = 0; i < mGains.size(); i++) {
6634            mGains[i]->dump(fd, spaces + 2, i);
6635        }
6636    }
6637}
6638
6639// --- AudioGain class implementation
6640
6641AudioPolicyManager::AudioGain::AudioGain(int index, bool useInChannelMask)
6642{
6643    mIndex = index;
6644    mUseInChannelMask = useInChannelMask;
6645    memset(&mGain, 0, sizeof(struct audio_gain));
6646}
6647
6648void AudioPolicyManager::AudioGain::getDefaultConfig(struct audio_gain_config *config)
6649{
6650    config->index = mIndex;
6651    config->mode = mGain.mode;
6652    config->channel_mask = mGain.channel_mask;
6653    if ((mGain.mode & AUDIO_GAIN_MODE_JOINT) == AUDIO_GAIN_MODE_JOINT) {
6654        config->values[0] = mGain.default_value;
6655    } else {
6656        uint32_t numValues;
6657        if (mUseInChannelMask) {
6658            numValues = audio_channel_count_from_in_mask(mGain.channel_mask);
6659        } else {
6660            numValues = audio_channel_count_from_out_mask(mGain.channel_mask);
6661        }
6662        for (size_t i = 0; i < numValues; i++) {
6663            config->values[i] = mGain.default_value;
6664        }
6665    }
6666    if ((mGain.mode & AUDIO_GAIN_MODE_RAMP) == AUDIO_GAIN_MODE_RAMP) {
6667        config->ramp_duration_ms = mGain.min_ramp_ms;
6668    }
6669}
6670
6671status_t AudioPolicyManager::AudioGain::checkConfig(const struct audio_gain_config *config)
6672{
6673    if ((config->mode & ~mGain.mode) != 0) {
6674        return BAD_VALUE;
6675    }
6676    if ((config->mode & AUDIO_GAIN_MODE_JOINT) == AUDIO_GAIN_MODE_JOINT) {
6677        if ((config->values[0] < mGain.min_value) ||
6678                    (config->values[0] > mGain.max_value)) {
6679            return BAD_VALUE;
6680        }
6681    } else {
6682        if ((config->channel_mask & ~mGain.channel_mask) != 0) {
6683            return BAD_VALUE;
6684        }
6685        uint32_t numValues;
6686        if (mUseInChannelMask) {
6687            numValues = audio_channel_count_from_in_mask(config->channel_mask);
6688        } else {
6689            numValues = audio_channel_count_from_out_mask(config->channel_mask);
6690        }
6691        for (size_t i = 0; i < numValues; i++) {
6692            if ((config->values[i] < mGain.min_value) ||
6693                    (config->values[i] > mGain.max_value)) {
6694                return BAD_VALUE;
6695            }
6696        }
6697    }
6698    if ((config->mode & AUDIO_GAIN_MODE_RAMP) == AUDIO_GAIN_MODE_RAMP) {
6699        if ((config->ramp_duration_ms < mGain.min_ramp_ms) ||
6700                    (config->ramp_duration_ms > mGain.max_ramp_ms)) {
6701            return BAD_VALUE;
6702        }
6703    }
6704    return NO_ERROR;
6705}
6706
6707void AudioPolicyManager::AudioGain::dump(int fd, int spaces, int index) const
6708{
6709    const size_t SIZE = 256;
6710    char buffer[SIZE];
6711    String8 result;
6712
6713    snprintf(buffer, SIZE, "%*sGain %d:\n", spaces, "", index+1);
6714    result.append(buffer);
6715    snprintf(buffer, SIZE, "%*s- mode: %08x\n", spaces, "", mGain.mode);
6716    result.append(buffer);
6717    snprintf(buffer, SIZE, "%*s- channel_mask: %08x\n", spaces, "", mGain.channel_mask);
6718    result.append(buffer);
6719    snprintf(buffer, SIZE, "%*s- min_value: %d mB\n", spaces, "", mGain.min_value);
6720    result.append(buffer);
6721    snprintf(buffer, SIZE, "%*s- max_value: %d mB\n", spaces, "", mGain.max_value);
6722    result.append(buffer);
6723    snprintf(buffer, SIZE, "%*s- default_value: %d mB\n", spaces, "", mGain.default_value);
6724    result.append(buffer);
6725    snprintf(buffer, SIZE, "%*s- step_value: %d mB\n", spaces, "", mGain.step_value);
6726    result.append(buffer);
6727    snprintf(buffer, SIZE, "%*s- min_ramp_ms: %d ms\n", spaces, "", mGain.min_ramp_ms);
6728    result.append(buffer);
6729    snprintf(buffer, SIZE, "%*s- max_ramp_ms: %d ms\n", spaces, "", mGain.max_ramp_ms);
6730    result.append(buffer);
6731
6732    write(fd, result.string(), result.size());
6733}
6734
6735// --- AudioPortConfig class implementation
6736
6737AudioPolicyManager::AudioPortConfig::AudioPortConfig()
6738{
6739    mSamplingRate = 0;
6740    mChannelMask = AUDIO_CHANNEL_NONE;
6741    mFormat = AUDIO_FORMAT_INVALID;
6742    mGain.index = -1;
6743}
6744
6745status_t AudioPolicyManager::AudioPortConfig::applyAudioPortConfig(
6746                                                        const struct audio_port_config *config,
6747                                                        struct audio_port_config *backupConfig)
6748{
6749    struct audio_port_config localBackupConfig;
6750    status_t status = NO_ERROR;
6751
6752    localBackupConfig.config_mask = config->config_mask;
6753    toAudioPortConfig(&localBackupConfig);
6754
6755    sp<AudioPort> audioport = getAudioPort();
6756    if (audioport == 0) {
6757        status = NO_INIT;
6758        goto exit;
6759    }
6760    if (config->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE) {
6761        status = audioport->checkExactSamplingRate(config->sample_rate);
6762        if (status != NO_ERROR) {
6763            goto exit;
6764        }
6765        mSamplingRate = config->sample_rate;
6766    }
6767    if (config->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK) {
6768        status = audioport->checkExactChannelMask(config->channel_mask);
6769        if (status != NO_ERROR) {
6770            goto exit;
6771        }
6772        mChannelMask = config->channel_mask;
6773    }
6774    if (config->config_mask & AUDIO_PORT_CONFIG_FORMAT) {
6775        status = audioport->checkFormat(config->format);
6776        if (status != NO_ERROR) {
6777            goto exit;
6778        }
6779        mFormat = config->format;
6780    }
6781    if (config->config_mask & AUDIO_PORT_CONFIG_GAIN) {
6782        status = audioport->checkGain(&config->gain, config->gain.index);
6783        if (status != NO_ERROR) {
6784            goto exit;
6785        }
6786        mGain = config->gain;
6787    }
6788
6789exit:
6790    if (status != NO_ERROR) {
6791        applyAudioPortConfig(&localBackupConfig);
6792    }
6793    if (backupConfig != NULL) {
6794        *backupConfig = localBackupConfig;
6795    }
6796    return status;
6797}
6798
6799void AudioPolicyManager::AudioPortConfig::toAudioPortConfig(
6800                                                    struct audio_port_config *dstConfig,
6801                                                    const struct audio_port_config *srcConfig) const
6802{
6803    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE) {
6804        dstConfig->sample_rate = mSamplingRate;
6805        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE)) {
6806            dstConfig->sample_rate = srcConfig->sample_rate;
6807        }
6808    } else {
6809        dstConfig->sample_rate = 0;
6810    }
6811    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK) {
6812        dstConfig->channel_mask = mChannelMask;
6813        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK)) {
6814            dstConfig->channel_mask = srcConfig->channel_mask;
6815        }
6816    } else {
6817        dstConfig->channel_mask = AUDIO_CHANNEL_NONE;
6818    }
6819    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_FORMAT) {
6820        dstConfig->format = mFormat;
6821        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_FORMAT)) {
6822            dstConfig->format = srcConfig->format;
6823        }
6824    } else {
6825        dstConfig->format = AUDIO_FORMAT_INVALID;
6826    }
6827    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_GAIN) {
6828        dstConfig->gain = mGain;
6829        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_GAIN)) {
6830            dstConfig->gain = srcConfig->gain;
6831        }
6832    } else {
6833        dstConfig->gain.index = -1;
6834    }
6835    if (dstConfig->gain.index != -1) {
6836        dstConfig->config_mask |= AUDIO_PORT_CONFIG_GAIN;
6837    } else {
6838        dstConfig->config_mask &= ~AUDIO_PORT_CONFIG_GAIN;
6839    }
6840}
6841
6842// --- IOProfile class implementation
6843
6844AudioPolicyManager::IOProfile::IOProfile(const String8& name, audio_port_role_t role,
6845                                         const sp<HwModule>& module)
6846    : AudioPort(name, AUDIO_PORT_TYPE_MIX, role, module)
6847{
6848}
6849
6850AudioPolicyManager::IOProfile::~IOProfile()
6851{
6852}
6853
6854// checks if the IO profile is compatible with specified parameters.
6855// Sampling rate, format and channel mask must be specified in order to
6856// get a valid a match
6857bool AudioPolicyManager::IOProfile::isCompatibleProfile(audio_devices_t device,
6858                                                            uint32_t samplingRate,
6859                                                            uint32_t *updatedSamplingRate,
6860                                                            audio_format_t format,
6861                                                            audio_channel_mask_t channelMask,
6862                                                            uint32_t flags) const
6863{
6864    const bool isPlaybackThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SOURCE;
6865    const bool isRecordThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SINK;
6866    ALOG_ASSERT(isPlaybackThread != isRecordThread);
6867
6868    if ((mSupportedDevices.types() & device) != device) {
6869        return false;
6870    }
6871
6872    if (samplingRate == 0) {
6873         return false;
6874    }
6875    uint32_t myUpdatedSamplingRate = samplingRate;
6876    if (isPlaybackThread && checkExactSamplingRate(samplingRate) != NO_ERROR) {
6877         return false;
6878    }
6879    if (isRecordThread && checkCompatibleSamplingRate(samplingRate, &myUpdatedSamplingRate) !=
6880            NO_ERROR) {
6881         return false;
6882    }
6883
6884    if (!audio_is_valid_format(format) || checkFormat(format) != NO_ERROR) {
6885        return false;
6886    }
6887
6888    if (isPlaybackThread && (!audio_is_output_channel(channelMask) ||
6889            checkExactChannelMask(channelMask) != NO_ERROR)) {
6890        return false;
6891    }
6892    if (isRecordThread && (!audio_is_input_channel(channelMask) ||
6893            checkCompatibleChannelMask(channelMask) != NO_ERROR)) {
6894        return false;
6895    }
6896
6897    if (isPlaybackThread && (mFlags & flags) != flags) {
6898        return false;
6899    }
6900    // The only input flag that is allowed to be different is the fast flag.
6901    // An existing fast stream is compatible with a normal track request.
6902    // An existing normal stream is compatible with a fast track request,
6903    // but the fast request will be denied by AudioFlinger and converted to normal track.
6904    if (isRecordThread && ((mFlags ^ flags) &
6905            ~AUDIO_INPUT_FLAG_FAST)) {
6906        return false;
6907    }
6908
6909    if (updatedSamplingRate != NULL) {
6910        *updatedSamplingRate = myUpdatedSamplingRate;
6911    }
6912    return true;
6913}
6914
6915void AudioPolicyManager::IOProfile::dump(int fd)
6916{
6917    const size_t SIZE = 256;
6918    char buffer[SIZE];
6919    String8 result;
6920
6921    AudioPort::dump(fd, 4);
6922
6923    snprintf(buffer, SIZE, "    - flags: 0x%04x\n", mFlags);
6924    result.append(buffer);
6925    snprintf(buffer, SIZE, "    - devices:\n");
6926    result.append(buffer);
6927    write(fd, result.string(), result.size());
6928    for (size_t i = 0; i < mSupportedDevices.size(); i++) {
6929        mSupportedDevices[i]->dump(fd, 6, i);
6930    }
6931}
6932
6933void AudioPolicyManager::IOProfile::log()
6934{
6935    const size_t SIZE = 256;
6936    char buffer[SIZE];
6937    String8 result;
6938
6939    ALOGV("    - sampling rates: ");
6940    for (size_t i = 0; i < mSamplingRates.size(); i++) {
6941        ALOGV("  %d", mSamplingRates[i]);
6942    }
6943
6944    ALOGV("    - channel masks: ");
6945    for (size_t i = 0; i < mChannelMasks.size(); i++) {
6946        ALOGV("  0x%04x", mChannelMasks[i]);
6947    }
6948
6949    ALOGV("    - formats: ");
6950    for (size_t i = 0; i < mFormats.size(); i++) {
6951        ALOGV("  0x%08x", mFormats[i]);
6952    }
6953
6954    ALOGV("    - devices: 0x%04x\n", mSupportedDevices.types());
6955    ALOGV("    - flags: 0x%04x\n", mFlags);
6956}
6957
6958
6959// --- DeviceDescriptor implementation
6960
6961
6962AudioPolicyManager::DeviceDescriptor::DeviceDescriptor(const String8& name, audio_devices_t type) :
6963                     AudioPort(name, AUDIO_PORT_TYPE_DEVICE,
6964                               audio_is_output_device(type) ? AUDIO_PORT_ROLE_SINK :
6965                                                              AUDIO_PORT_ROLE_SOURCE,
6966                             NULL),
6967                     mDeviceType(type), mAddress(""), mId(0)
6968{
6969    if (mGains.size() > 0) {
6970        mGains[0]->getDefaultConfig(&mGain);
6971    }
6972}
6973
6974bool AudioPolicyManager::DeviceDescriptor::equals(const sp<DeviceDescriptor>& other) const
6975{
6976    // Devices are considered equal if they:
6977    // - are of the same type (a device type cannot be AUDIO_DEVICE_NONE)
6978    // - have the same address or one device does not specify the address
6979    // - have the same channel mask or one device does not specify the channel mask
6980    return (mDeviceType == other->mDeviceType) &&
6981           (mAddress == "" || other->mAddress == "" || mAddress == other->mAddress) &&
6982           (mChannelMask == 0 || other->mChannelMask == 0 ||
6983                mChannelMask == other->mChannelMask);
6984}
6985
6986void AudioPolicyManager::DeviceVector::refreshTypes()
6987{
6988    mDeviceTypes = AUDIO_DEVICE_NONE;
6989    for(size_t i = 0; i < size(); i++) {
6990        mDeviceTypes |= itemAt(i)->mDeviceType;
6991    }
6992    ALOGV("DeviceVector::refreshTypes() mDeviceTypes %08x", mDeviceTypes);
6993}
6994
6995ssize_t AudioPolicyManager::DeviceVector::indexOf(const sp<DeviceDescriptor>& item) const
6996{
6997    for(size_t i = 0; i < size(); i++) {
6998        if (item->equals(itemAt(i))) {
6999            return i;
7000        }
7001    }
7002    return -1;
7003}
7004
7005ssize_t AudioPolicyManager::DeviceVector::add(const sp<DeviceDescriptor>& item)
7006{
7007    ssize_t ret = indexOf(item);
7008
7009    if (ret < 0) {
7010        ret = SortedVector::add(item);
7011        if (ret >= 0) {
7012            refreshTypes();
7013        }
7014    } else {
7015        ALOGW("DeviceVector::add device %08x already in", item->mDeviceType);
7016        ret = -1;
7017    }
7018    return ret;
7019}
7020
7021ssize_t AudioPolicyManager::DeviceVector::remove(const sp<DeviceDescriptor>& item)
7022{
7023    size_t i;
7024    ssize_t ret = indexOf(item);
7025
7026    if (ret < 0) {
7027        ALOGW("DeviceVector::remove device %08x not in", item->mDeviceType);
7028    } else {
7029        ret = SortedVector::removeAt(ret);
7030        if (ret >= 0) {
7031            refreshTypes();
7032        }
7033    }
7034    return ret;
7035}
7036
7037void AudioPolicyManager::DeviceVector::loadDevicesFromType(audio_devices_t types)
7038{
7039    DeviceVector deviceList;
7040
7041    uint32_t role_bit = AUDIO_DEVICE_BIT_IN & types;
7042    types &= ~role_bit;
7043
7044    while (types) {
7045        uint32_t i = 31 - __builtin_clz(types);
7046        uint32_t type = 1 << i;
7047        types &= ~type;
7048        add(new DeviceDescriptor(String8(""), type | role_bit));
7049    }
7050}
7051
7052void AudioPolicyManager::DeviceVector::loadDevicesFromName(char *name,
7053                                                           const DeviceVector& declaredDevices)
7054{
7055    char *devName = strtok(name, "|");
7056    while (devName != NULL) {
7057        if (strlen(devName) != 0) {
7058            audio_devices_t type = stringToEnum(sDeviceNameToEnumTable,
7059                                 ARRAY_SIZE(sDeviceNameToEnumTable),
7060                                 devName);
7061            if (type != AUDIO_DEVICE_NONE) {
7062                sp<DeviceDescriptor> dev = new DeviceDescriptor(String8(""), type);
7063                if (type == AUDIO_DEVICE_IN_REMOTE_SUBMIX) {
7064                    dev->mAddress = String8("0");
7065                }
7066                add(dev);
7067            } else {
7068                sp<DeviceDescriptor> deviceDesc =
7069                        declaredDevices.getDeviceFromName(String8(devName));
7070                if (deviceDesc != 0) {
7071                    add(deviceDesc);
7072                }
7073            }
7074         }
7075        devName = strtok(NULL, "|");
7076     }
7077}
7078
7079sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDevice(
7080                                                        audio_devices_t type, String8 address) const
7081{
7082    sp<DeviceDescriptor> device;
7083    for (size_t i = 0; i < size(); i++) {
7084        if (itemAt(i)->mDeviceType == type) {
7085            device = itemAt(i);
7086            if (itemAt(i)->mAddress = address) {
7087                break;
7088            }
7089        }
7090    }
7091    ALOGV("DeviceVector::getDevice() for type %d address %s found %p",
7092          type, address.string(), device.get());
7093    return device;
7094}
7095
7096sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDeviceFromId(
7097                                                                    audio_port_handle_t id) const
7098{
7099    sp<DeviceDescriptor> device;
7100    for (size_t i = 0; i < size(); i++) {
7101        ALOGV("DeviceVector::getDeviceFromId(%d) itemAt(%zu)->mId %d", id, i, itemAt(i)->mId);
7102        if (itemAt(i)->mId == id) {
7103            device = itemAt(i);
7104            break;
7105        }
7106    }
7107    return device;
7108}
7109
7110AudioPolicyManager::DeviceVector AudioPolicyManager::DeviceVector::getDevicesFromType(
7111                                                                        audio_devices_t type) const
7112{
7113    DeviceVector devices;
7114    for (size_t i = 0; (i < size()) && (type != AUDIO_DEVICE_NONE); i++) {
7115        if (itemAt(i)->mDeviceType & type & ~AUDIO_DEVICE_BIT_IN) {
7116            devices.add(itemAt(i));
7117            type &= ~itemAt(i)->mDeviceType;
7118            ALOGV("DeviceVector::getDevicesFromType() for type %x found %p",
7119                  itemAt(i)->mDeviceType, itemAt(i).get());
7120        }
7121    }
7122    return devices;
7123}
7124
7125AudioPolicyManager::DeviceVector AudioPolicyManager::DeviceVector::getDevicesFromTypeAddr(
7126        audio_devices_t type, String8 address) const
7127{
7128    DeviceVector devices;
7129    //ALOGV("   looking for device=%x, addr=%s", type, address.string());
7130    for (size_t i = 0; i < size(); i++) {
7131        //ALOGV("     at i=%d: device=%x, addr=%s",
7132        //        i, itemAt(i)->mDeviceType, itemAt(i)->mAddress.string());
7133        if (itemAt(i)->mDeviceType == type) {
7134            if (itemAt(i)->mAddress == address) {
7135                //ALOGV("      found matching address %s", address.string());
7136                devices.add(itemAt(i));
7137            }
7138        }
7139    }
7140    return devices;
7141}
7142
7143sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDeviceFromName(
7144        const String8& name) const
7145{
7146    sp<DeviceDescriptor> device;
7147    for (size_t i = 0; i < size(); i++) {
7148        if (itemAt(i)->mName == name) {
7149            device = itemAt(i);
7150            break;
7151        }
7152    }
7153    return device;
7154}
7155
7156void AudioPolicyManager::DeviceDescriptor::toAudioPortConfig(
7157                                                    struct audio_port_config *dstConfig,
7158                                                    const struct audio_port_config *srcConfig) const
7159{
7160    dstConfig->config_mask = AUDIO_PORT_CONFIG_CHANNEL_MASK|AUDIO_PORT_CONFIG_GAIN;
7161    if (srcConfig != NULL) {
7162        dstConfig->config_mask |= srcConfig->config_mask;
7163    }
7164
7165    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
7166
7167    dstConfig->id = mId;
7168    dstConfig->role = audio_is_output_device(mDeviceType) ?
7169                        AUDIO_PORT_ROLE_SINK : AUDIO_PORT_ROLE_SOURCE;
7170    dstConfig->type = AUDIO_PORT_TYPE_DEVICE;
7171    dstConfig->ext.device.type = mDeviceType;
7172    dstConfig->ext.device.hw_module = mModule->mHandle;
7173    strncpy(dstConfig->ext.device.address, mAddress.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN);
7174}
7175
7176void AudioPolicyManager::DeviceDescriptor::toAudioPort(struct audio_port *port) const
7177{
7178    ALOGV("DeviceDescriptor::toAudioPort() handle %d type %x", mId, mDeviceType);
7179    AudioPort::toAudioPort(port);
7180    port->id = mId;
7181    toAudioPortConfig(&port->active_config);
7182    port->ext.device.type = mDeviceType;
7183    port->ext.device.hw_module = mModule->mHandle;
7184    strncpy(port->ext.device.address, mAddress.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN);
7185}
7186
7187status_t AudioPolicyManager::DeviceDescriptor::dump(int fd, int spaces, int index) const
7188{
7189    const size_t SIZE = 256;
7190    char buffer[SIZE];
7191    String8 result;
7192
7193    snprintf(buffer, SIZE, "%*sDevice %d:\n", spaces, "", index+1);
7194    result.append(buffer);
7195    if (mId != 0) {
7196        snprintf(buffer, SIZE, "%*s- id: %2d\n", spaces, "", mId);
7197        result.append(buffer);
7198    }
7199    snprintf(buffer, SIZE, "%*s- type: %-48s\n", spaces, "",
7200                                              enumToString(sDeviceNameToEnumTable,
7201                                                           ARRAY_SIZE(sDeviceNameToEnumTable),
7202                                                           mDeviceType));
7203    result.append(buffer);
7204    if (mAddress.size() != 0) {
7205        snprintf(buffer, SIZE, "%*s- address: %-32s\n", spaces, "", mAddress.string());
7206        result.append(buffer);
7207    }
7208    write(fd, result.string(), result.size());
7209    AudioPort::dump(fd, spaces);
7210
7211    return NO_ERROR;
7212}
7213
7214status_t AudioPolicyManager::AudioPatch::dump(int fd, int spaces, int index) const
7215{
7216    const size_t SIZE = 256;
7217    char buffer[SIZE];
7218    String8 result;
7219
7220
7221    snprintf(buffer, SIZE, "%*sAudio patch %d:\n", spaces, "", index+1);
7222    result.append(buffer);
7223    snprintf(buffer, SIZE, "%*s- handle: %2d\n", spaces, "", mHandle);
7224    result.append(buffer);
7225    snprintf(buffer, SIZE, "%*s- audio flinger handle: %2d\n", spaces, "", mAfPatchHandle);
7226    result.append(buffer);
7227    snprintf(buffer, SIZE, "%*s- owner uid: %2d\n", spaces, "", mUid);
7228    result.append(buffer);
7229    snprintf(buffer, SIZE, "%*s- %d sources:\n", spaces, "", mPatch.num_sources);
7230    result.append(buffer);
7231    for (size_t i = 0; i < mPatch.num_sources; i++) {
7232        if (mPatch.sources[i].type == AUDIO_PORT_TYPE_DEVICE) {
7233            snprintf(buffer, SIZE, "%*s- Device ID %d %s\n", spaces + 2, "",
7234                     mPatch.sources[i].id, enumToString(sDeviceNameToEnumTable,
7235                                                        ARRAY_SIZE(sDeviceNameToEnumTable),
7236                                                        mPatch.sources[i].ext.device.type));
7237        } else {
7238            snprintf(buffer, SIZE, "%*s- Mix ID %d I/O handle %d\n", spaces + 2, "",
7239                     mPatch.sources[i].id, mPatch.sources[i].ext.mix.handle);
7240        }
7241        result.append(buffer);
7242    }
7243    snprintf(buffer, SIZE, "%*s- %d sinks:\n", spaces, "", mPatch.num_sinks);
7244    result.append(buffer);
7245    for (size_t i = 0; i < mPatch.num_sinks; i++) {
7246        if (mPatch.sinks[i].type == AUDIO_PORT_TYPE_DEVICE) {
7247            snprintf(buffer, SIZE, "%*s- Device ID %d %s\n", spaces + 2, "",
7248                     mPatch.sinks[i].id, enumToString(sDeviceNameToEnumTable,
7249                                                        ARRAY_SIZE(sDeviceNameToEnumTable),
7250                                                        mPatch.sinks[i].ext.device.type));
7251        } else {
7252            snprintf(buffer, SIZE, "%*s- Mix ID %d I/O handle %d\n", spaces + 2, "",
7253                     mPatch.sinks[i].id, mPatch.sinks[i].ext.mix.handle);
7254        }
7255        result.append(buffer);
7256    }
7257
7258    write(fd, result.string(), result.size());
7259    return NO_ERROR;
7260}
7261
7262// --- audio_policy.conf file parsing
7263
7264uint32_t AudioPolicyManager::parseOutputFlagNames(char *name)
7265{
7266    uint32_t flag = 0;
7267
7268    // it is OK to cast name to non const here as we are not going to use it after
7269    // strtok() modifies it
7270    char *flagName = strtok(name, "|");
7271    while (flagName != NULL) {
7272        if (strlen(flagName) != 0) {
7273            flag |= stringToEnum(sOutputFlagNameToEnumTable,
7274                               ARRAY_SIZE(sOutputFlagNameToEnumTable),
7275                               flagName);
7276        }
7277        flagName = strtok(NULL, "|");
7278    }
7279    //force direct flag if offload flag is set: offloading implies a direct output stream
7280    // and all common behaviors are driven by checking only the direct flag
7281    // this should normally be set appropriately in the policy configuration file
7282    if ((flag & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
7283        flag |= AUDIO_OUTPUT_FLAG_DIRECT;
7284    }
7285
7286    return flag;
7287}
7288
7289uint32_t AudioPolicyManager::parseInputFlagNames(char *name)
7290{
7291    uint32_t flag = 0;
7292
7293    // it is OK to cast name to non const here as we are not going to use it after
7294    // strtok() modifies it
7295    char *flagName = strtok(name, "|");
7296    while (flagName != NULL) {
7297        if (strlen(flagName) != 0) {
7298            flag |= stringToEnum(sInputFlagNameToEnumTable,
7299                               ARRAY_SIZE(sInputFlagNameToEnumTable),
7300                               flagName);
7301        }
7302        flagName = strtok(NULL, "|");
7303    }
7304    return flag;
7305}
7306
7307audio_devices_t AudioPolicyManager::parseDeviceNames(char *name)
7308{
7309    uint32_t device = 0;
7310
7311    char *devName = strtok(name, "|");
7312    while (devName != NULL) {
7313        if (strlen(devName) != 0) {
7314            device |= stringToEnum(sDeviceNameToEnumTable,
7315                                 ARRAY_SIZE(sDeviceNameToEnumTable),
7316                                 devName);
7317         }
7318        devName = strtok(NULL, "|");
7319     }
7320    return device;
7321}
7322
7323void AudioPolicyManager::loadHwModule(cnode *root)
7324{
7325    status_t status = NAME_NOT_FOUND;
7326    cnode *node;
7327    sp<HwModule> module = new HwModule(root->name);
7328
7329    node = config_find(root, DEVICES_TAG);
7330    if (node != NULL) {
7331        node = node->first_child;
7332        while (node) {
7333            ALOGV("loadHwModule() loading device %s", node->name);
7334            status_t tmpStatus = module->loadDevice(node);
7335            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
7336                status = tmpStatus;
7337            }
7338            node = node->next;
7339        }
7340    }
7341    node = config_find(root, OUTPUTS_TAG);
7342    if (node != NULL) {
7343        node = node->first_child;
7344        while (node) {
7345            ALOGV("loadHwModule() loading output %s", node->name);
7346            status_t tmpStatus = module->loadOutput(node);
7347            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
7348                status = tmpStatus;
7349            }
7350            node = node->next;
7351        }
7352    }
7353    node = config_find(root, INPUTS_TAG);
7354    if (node != NULL) {
7355        node = node->first_child;
7356        while (node) {
7357            ALOGV("loadHwModule() loading input %s", node->name);
7358            status_t tmpStatus = module->loadInput(node);
7359            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
7360                status = tmpStatus;
7361            }
7362            node = node->next;
7363        }
7364    }
7365    loadGlobalConfig(root, module);
7366
7367    if (status == NO_ERROR) {
7368        mHwModules.add(module);
7369    }
7370}
7371
7372void AudioPolicyManager::loadHwModules(cnode *root)
7373{
7374    cnode *node = config_find(root, AUDIO_HW_MODULE_TAG);
7375    if (node == NULL) {
7376        return;
7377    }
7378
7379    node = node->first_child;
7380    while (node) {
7381        ALOGV("loadHwModules() loading module %s", node->name);
7382        loadHwModule(node);
7383        node = node->next;
7384    }
7385}
7386
7387void AudioPolicyManager::loadGlobalConfig(cnode *root, const sp<HwModule>& module)
7388{
7389    cnode *node = config_find(root, GLOBAL_CONFIG_TAG);
7390
7391    if (node == NULL) {
7392        return;
7393    }
7394    DeviceVector declaredDevices;
7395    if (module != NULL) {
7396        declaredDevices = module->mDeclaredDevices;
7397    }
7398
7399    node = node->first_child;
7400    while (node) {
7401        if (strcmp(ATTACHED_OUTPUT_DEVICES_TAG, node->name) == 0) {
7402            mAvailableOutputDevices.loadDevicesFromName((char *)node->value,
7403                                                        declaredDevices);
7404            ALOGV("loadGlobalConfig() Attached Output Devices %08x",
7405                  mAvailableOutputDevices.types());
7406        } else if (strcmp(DEFAULT_OUTPUT_DEVICE_TAG, node->name) == 0) {
7407            audio_devices_t device = (audio_devices_t)stringToEnum(sDeviceNameToEnumTable,
7408                                              ARRAY_SIZE(sDeviceNameToEnumTable),
7409                                              (char *)node->value);
7410            if (device != AUDIO_DEVICE_NONE) {
7411                mDefaultOutputDevice = new DeviceDescriptor(String8(""), device);
7412            } else {
7413                ALOGW("loadGlobalConfig() default device not specified");
7414            }
7415            ALOGV("loadGlobalConfig() mDefaultOutputDevice %08x", mDefaultOutputDevice->mDeviceType);
7416        } else if (strcmp(ATTACHED_INPUT_DEVICES_TAG, node->name) == 0) {
7417            mAvailableInputDevices.loadDevicesFromName((char *)node->value,
7418                                                       declaredDevices);
7419            ALOGV("loadGlobalConfig() Available InputDevices %08x", mAvailableInputDevices.types());
7420        } else if (strcmp(SPEAKER_DRC_ENABLED_TAG, node->name) == 0) {
7421            mSpeakerDrcEnabled = stringToBool((char *)node->value);
7422            ALOGV("loadGlobalConfig() mSpeakerDrcEnabled = %d", mSpeakerDrcEnabled);
7423        } else if (strcmp(AUDIO_HAL_VERSION_TAG, node->name) == 0) {
7424            uint32_t major, minor;
7425            sscanf((char *)node->value, "%u.%u", &major, &minor);
7426            module->mHalVersion = HARDWARE_DEVICE_API_VERSION(major, minor);
7427            ALOGV("loadGlobalConfig() mHalVersion = %04x major %u minor %u",
7428                  module->mHalVersion, major, minor);
7429        }
7430        node = node->next;
7431    }
7432}
7433
7434status_t AudioPolicyManager::loadAudioPolicyConfig(const char *path)
7435{
7436    cnode *root;
7437    char *data;
7438
7439    data = (char *)load_file(path, NULL);
7440    if (data == NULL) {
7441        return -ENODEV;
7442    }
7443    root = config_node("", "");
7444    config_load(root, data);
7445
7446    loadHwModules(root);
7447    // legacy audio_policy.conf files have one global_configuration section
7448    loadGlobalConfig(root, getModuleFromName(AUDIO_HARDWARE_MODULE_ID_PRIMARY));
7449    config_free(root);
7450    free(root);
7451    free(data);
7452
7453    ALOGI("loadAudioPolicyConfig() loaded %s\n", path);
7454
7455    return NO_ERROR;
7456}
7457
7458void AudioPolicyManager::defaultAudioPolicyConfig(void)
7459{
7460    sp<HwModule> module;
7461    sp<IOProfile> profile;
7462    sp<DeviceDescriptor> defaultInputDevice = new DeviceDescriptor(String8(""),
7463                                                                   AUDIO_DEVICE_IN_BUILTIN_MIC);
7464    mAvailableOutputDevices.add(mDefaultOutputDevice);
7465    mAvailableInputDevices.add(defaultInputDevice);
7466
7467    module = new HwModule("primary");
7468
7469    profile = new IOProfile(String8("primary"), AUDIO_PORT_ROLE_SOURCE, module);
7470    profile->mSamplingRates.add(44100);
7471    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
7472    profile->mChannelMasks.add(AUDIO_CHANNEL_OUT_STEREO);
7473    profile->mSupportedDevices.add(mDefaultOutputDevice);
7474    profile->mFlags = AUDIO_OUTPUT_FLAG_PRIMARY;
7475    module->mOutputProfiles.add(profile);
7476
7477    profile = new IOProfile(String8("primary"), AUDIO_PORT_ROLE_SINK, module);
7478    profile->mSamplingRates.add(8000);
7479    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
7480    profile->mChannelMasks.add(AUDIO_CHANNEL_IN_MONO);
7481    profile->mSupportedDevices.add(defaultInputDevice);
7482    module->mInputProfiles.add(profile);
7483
7484    mHwModules.add(module);
7485}
7486
7487audio_stream_type_t AudioPolicyManager::streamTypefromAttributesInt(const audio_attributes_t *attr)
7488{
7489    // flags to stream type mapping
7490    if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
7491        return AUDIO_STREAM_ENFORCED_AUDIBLE;
7492    }
7493    if ((attr->flags & AUDIO_FLAG_SCO) == AUDIO_FLAG_SCO) {
7494        return AUDIO_STREAM_BLUETOOTH_SCO;
7495    }
7496
7497    // usage to stream type mapping
7498    switch (attr->usage) {
7499    case AUDIO_USAGE_MEDIA:
7500    case AUDIO_USAGE_GAME:
7501    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
7502        return AUDIO_STREAM_MUSIC;
7503    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
7504        return AUDIO_STREAM_ACCESSIBILITY;
7505    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
7506        return AUDIO_STREAM_SYSTEM;
7507    case AUDIO_USAGE_VOICE_COMMUNICATION:
7508        return AUDIO_STREAM_VOICE_CALL;
7509
7510    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
7511        return AUDIO_STREAM_DTMF;
7512
7513    case AUDIO_USAGE_ALARM:
7514        return AUDIO_STREAM_ALARM;
7515    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
7516        return AUDIO_STREAM_RING;
7517
7518    case AUDIO_USAGE_NOTIFICATION:
7519    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
7520    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
7521    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
7522    case AUDIO_USAGE_NOTIFICATION_EVENT:
7523        return AUDIO_STREAM_NOTIFICATION;
7524
7525    case AUDIO_USAGE_UNKNOWN:
7526    default:
7527        return AUDIO_STREAM_MUSIC;
7528    }
7529}
7530}; // namespace android
7531