AudioPolicyManager.cpp revision 29e6cecdd8562700ab625c5645ddd6a7753789f1 
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            handleIncallSonification((audio_stream_type_t)stream, false, true);
588        }
589    }
590
591    // store previous phone state for management of sonification strategy below
592    int oldState = mPhoneState;
593    mPhoneState = state;
594    bool force = false;
595
596    // are we entering or starting a call
597    if (!isStateInCall(oldState) && isStateInCall(state)) {
598        ALOGV("  Entering call in setPhoneState()");
599        // force routing command to audio hardware when starting a call
600        // even if no device change is needed
601        force = true;
602        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
603            mStreams[AUDIO_STREAM_DTMF].mVolumeCurve[j] =
604                    sVolumeProfiles[AUDIO_STREAM_VOICE_CALL][j];
605        }
606    } else if (isStateInCall(oldState) && !isStateInCall(state)) {
607        ALOGV("  Exiting call in setPhoneState()");
608        // force routing command to audio hardware when exiting a call
609        // even if no device change is needed
610        force = true;
611        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
612            mStreams[AUDIO_STREAM_DTMF].mVolumeCurve[j] =
613                    sVolumeProfiles[AUDIO_STREAM_DTMF][j];
614        }
615    } else if (isStateInCall(state) && (state != oldState)) {
616        ALOGV("  Switching between telephony and VoIP in setPhoneState()");
617        // force routing command to audio hardware when switching between telephony and VoIP
618        // even if no device change is needed
619        force = true;
620    }
621
622    // check for device and output changes triggered by new phone state
623    checkA2dpSuspend();
624    checkOutputForAllStrategies();
625    updateDevicesAndOutputs();
626
627    sp<AudioOutputDescriptor> hwOutputDesc = mOutputs.valueFor(mPrimaryOutput);
628
629    int delayMs = 0;
630    if (isStateInCall(state)) {
631        nsecs_t sysTime = systemTime();
632        for (size_t i = 0; i < mOutputs.size(); i++) {
633            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
634            // mute media and sonification strategies and delay device switch by the largest
635            // latency of any output where either strategy is active.
636            // This avoid sending the ring tone or music tail into the earpiece or headset.
637            if ((desc->isStrategyActive(STRATEGY_MEDIA,
638                                     SONIFICATION_HEADSET_MUSIC_DELAY,
639                                     sysTime) ||
640                    desc->isStrategyActive(STRATEGY_SONIFICATION,
641                                         SONIFICATION_HEADSET_MUSIC_DELAY,
642                                         sysTime)) &&
643                    (delayMs < (int)desc->mLatency*2)) {
644                delayMs = desc->mLatency*2;
645            }
646            setStrategyMute(STRATEGY_MEDIA, true, mOutputs.keyAt(i));
647            setStrategyMute(STRATEGY_MEDIA, false, mOutputs.keyAt(i), MUTE_TIME_MS,
648                getDeviceForStrategy(STRATEGY_MEDIA, true /*fromCache*/));
649            setStrategyMute(STRATEGY_SONIFICATION, true, mOutputs.keyAt(i));
650            setStrategyMute(STRATEGY_SONIFICATION, false, mOutputs.keyAt(i), MUTE_TIME_MS,
651                getDeviceForStrategy(STRATEGY_SONIFICATION, true /*fromCache*/));
652        }
653    }
654
655    // Note that despite the fact that getNewOutputDevice() is called on the primary output,
656    // the device returned is not necessarily reachable via this output
657    audio_devices_t rxDevice = getNewOutputDevice(mPrimaryOutput, false /*fromCache*/);
658    // force routing command to audio hardware when ending call
659    // even if no device change is needed
660    if (isStateInCall(oldState) && rxDevice == AUDIO_DEVICE_NONE) {
661        rxDevice = hwOutputDesc->device();
662    }
663
664    if (state == AUDIO_MODE_IN_CALL) {
665        updateCallRouting(rxDevice, delayMs);
666    } else if (oldState == AUDIO_MODE_IN_CALL) {
667        if (mCallRxPatch != 0) {
668            mpClientInterface->releaseAudioPatch(mCallRxPatch->mAfPatchHandle, 0);
669            mCallRxPatch.clear();
670        }
671        if (mCallTxPatch != 0) {
672            mpClientInterface->releaseAudioPatch(mCallTxPatch->mAfPatchHandle, 0);
673            mCallTxPatch.clear();
674        }
675        setOutputDevice(mPrimaryOutput, rxDevice, force, 0);
676    } else {
677        setOutputDevice(mPrimaryOutput, rxDevice, force, 0);
678    }
679    // if entering in call state, handle special case of active streams
680    // pertaining to sonification strategy see handleIncallSonification()
681    if (isStateInCall(state)) {
682        ALOGV("setPhoneState() in call state management: new state is %d", state);
683        for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
684            handleIncallSonification((audio_stream_type_t)stream, true, true);
685        }
686    }
687
688    // Flag that ringtone volume must be limited to music volume until we exit MODE_RINGTONE
689    if (state == AUDIO_MODE_RINGTONE &&
690        isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY)) {
691        mLimitRingtoneVolume = true;
692    } else {
693        mLimitRingtoneVolume = false;
694    }
695}
696
697void AudioPolicyManager::setForceUse(audio_policy_force_use_t usage,
698                                         audio_policy_forced_cfg_t config)
699{
700    ALOGV("setForceUse() usage %d, config %d, mPhoneState %d", usage, config, mPhoneState);
701
702    bool forceVolumeReeval = false;
703    switch(usage) {
704    case AUDIO_POLICY_FORCE_FOR_COMMUNICATION:
705        if (config != AUDIO_POLICY_FORCE_SPEAKER && config != AUDIO_POLICY_FORCE_BT_SCO &&
706            config != AUDIO_POLICY_FORCE_NONE) {
707            ALOGW("setForceUse() invalid config %d for FOR_COMMUNICATION", config);
708            return;
709        }
710        forceVolumeReeval = true;
711        mForceUse[usage] = config;
712        break;
713    case AUDIO_POLICY_FORCE_FOR_MEDIA:
714        if (config != AUDIO_POLICY_FORCE_HEADPHONES && config != AUDIO_POLICY_FORCE_BT_A2DP &&
715            config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
716            config != AUDIO_POLICY_FORCE_ANALOG_DOCK &&
717            config != AUDIO_POLICY_FORCE_DIGITAL_DOCK && config != AUDIO_POLICY_FORCE_NONE &&
718            config != AUDIO_POLICY_FORCE_NO_BT_A2DP && config != AUDIO_POLICY_FORCE_SPEAKER ) {
719            ALOGW("setForceUse() invalid config %d for FOR_MEDIA", config);
720            return;
721        }
722        mForceUse[usage] = config;
723        break;
724    case AUDIO_POLICY_FORCE_FOR_RECORD:
725        if (config != AUDIO_POLICY_FORCE_BT_SCO && config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
726            config != AUDIO_POLICY_FORCE_NONE) {
727            ALOGW("setForceUse() invalid config %d for FOR_RECORD", config);
728            return;
729        }
730        mForceUse[usage] = config;
731        break;
732    case AUDIO_POLICY_FORCE_FOR_DOCK:
733        if (config != AUDIO_POLICY_FORCE_NONE && config != AUDIO_POLICY_FORCE_BT_CAR_DOCK &&
734            config != AUDIO_POLICY_FORCE_BT_DESK_DOCK &&
735            config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
736            config != AUDIO_POLICY_FORCE_ANALOG_DOCK &&
737            config != AUDIO_POLICY_FORCE_DIGITAL_DOCK) {
738            ALOGW("setForceUse() invalid config %d for FOR_DOCK", config);
739        }
740        forceVolumeReeval = true;
741        mForceUse[usage] = config;
742        break;
743    case AUDIO_POLICY_FORCE_FOR_SYSTEM:
744        if (config != AUDIO_POLICY_FORCE_NONE &&
745            config != AUDIO_POLICY_FORCE_SYSTEM_ENFORCED) {
746            ALOGW("setForceUse() invalid config %d for FOR_SYSTEM", config);
747        }
748        forceVolumeReeval = true;
749        mForceUse[usage] = config;
750        break;
751    case AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO:
752        if (config != AUDIO_POLICY_FORCE_NONE &&
753            config != AUDIO_POLICY_FORCE_HDMI_SYSTEM_AUDIO_ENFORCED) {
754            ALOGW("setForceUse() invalid config %d forHDMI_SYSTEM_AUDIO", config);
755        }
756        mForceUse[usage] = config;
757        break;
758    default:
759        ALOGW("setForceUse() invalid usage %d", usage);
760        break;
761    }
762
763    // check for device and output changes triggered by new force usage
764    checkA2dpSuspend();
765    checkOutputForAllStrategies();
766    updateDevicesAndOutputs();
767    if (mPhoneState == AUDIO_MODE_IN_CALL) {
768        audio_devices_t newDevice = getNewOutputDevice(mPrimaryOutput, true /*fromCache*/);
769        updateCallRouting(newDevice);
770    }
771    for (size_t i = 0; i < mOutputs.size(); i++) {
772        audio_io_handle_t output = mOutputs.keyAt(i);
773        audio_devices_t newDevice = getNewOutputDevice(output, true /*fromCache*/);
774        if ((mPhoneState != AUDIO_MODE_IN_CALL) || (output != mPrimaryOutput)) {
775            setOutputDevice(output, newDevice, (newDevice != AUDIO_DEVICE_NONE));
776        }
777        if (forceVolumeReeval && (newDevice != AUDIO_DEVICE_NONE)) {
778            applyStreamVolumes(output, newDevice, 0, true);
779        }
780    }
781
782    audio_io_handle_t activeInput = getActiveInput();
783    if (activeInput != 0) {
784        setInputDevice(activeInput, getNewInputDevice(activeInput));
785    }
786
787}
788
789audio_policy_forced_cfg_t AudioPolicyManager::getForceUse(audio_policy_force_use_t usage)
790{
791    return mForceUse[usage];
792}
793
794void AudioPolicyManager::setSystemProperty(const char* property, const char* value)
795{
796    ALOGV("setSystemProperty() property %s, value %s", property, value);
797}
798
799// Find a direct output profile compatible with the parameters passed, even if the input flags do
800// not explicitly request a direct output
801sp<AudioPolicyManager::IOProfile> AudioPolicyManager::getProfileForDirectOutput(
802                                                               audio_devices_t device,
803                                                               uint32_t samplingRate,
804                                                               audio_format_t format,
805                                                               audio_channel_mask_t channelMask,
806                                                               audio_output_flags_t flags)
807{
808    for (size_t i = 0; i < mHwModules.size(); i++) {
809        if (mHwModules[i]->mHandle == 0) {
810            continue;
811        }
812        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++) {
813            sp<IOProfile> profile = mHwModules[i]->mOutputProfiles[j];
814            bool found = profile->isCompatibleProfile(device, samplingRate,
815                    NULL /*updatedSamplingRate*/, format, channelMask,
816                    flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD ?
817                        AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD : AUDIO_OUTPUT_FLAG_DIRECT);
818            if (found && (mAvailableOutputDevices.types() & profile->mSupportedDevices.types())) {
819                return profile;
820            }
821        }
822    }
823    return 0;
824}
825
826audio_io_handle_t AudioPolicyManager::getOutput(audio_stream_type_t stream,
827                                    uint32_t samplingRate,
828                                    audio_format_t format,
829                                    audio_channel_mask_t channelMask,
830                                    audio_output_flags_t flags,
831                                    const audio_offload_info_t *offloadInfo)
832{
833
834    routing_strategy strategy = getStrategy(stream);
835    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
836    ALOGV("getOutput() device %d, stream %d, samplingRate %d, format %x, channelMask %x, flags %x",
837          device, stream, samplingRate, format, channelMask, flags);
838
839    return getOutputForDevice(device, stream, samplingRate,format, channelMask, flags,
840            offloadInfo);
841}
842
843audio_io_handle_t AudioPolicyManager::getOutputForAttr(const audio_attributes_t *attr,
844                                    uint32_t samplingRate,
845                                    audio_format_t format,
846                                    audio_channel_mask_t channelMask,
847                                    audio_output_flags_t flags,
848                                    const audio_offload_info_t *offloadInfo)
849{
850    if (attr == NULL) {
851        ALOGE("getOutputForAttr() called with NULL audio attributes");
852        return 0;
853    }
854    ALOGV("getOutputForAttr() usage=%d, content=%d, tag=%s flags=%08x",
855            attr->usage, attr->content_type, attr->tags, attr->flags);
856
857    // TODO this is where filtering for custom policies (rerouting, dynamic sources) will go
858    routing_strategy strategy = (routing_strategy) getStrategyForAttr(attr);
859    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
860
861    if ((attr->flags & AUDIO_FLAG_HW_AV_SYNC) != 0) {
862        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_HW_AV_SYNC);
863    }
864
865    ALOGV("getOutputForAttr() device 0x%x, samplingRate %d, format %x, channelMask %x, flags %x",
866          device, samplingRate, format, channelMask, flags);
867
868    audio_stream_type_t stream = streamTypefromAttributesInt(attr);
869    return getOutputForDevice(device, stream, samplingRate, format, channelMask, flags,
870                offloadInfo);
871}
872
873audio_io_handle_t AudioPolicyManager::getOutputForDevice(
874        audio_devices_t device,
875        audio_stream_type_t stream,
876        uint32_t samplingRate,
877        audio_format_t format,
878        audio_channel_mask_t channelMask,
879        audio_output_flags_t flags,
880        const audio_offload_info_t *offloadInfo)
881{
882    audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
883    uint32_t latency = 0;
884    status_t status;
885
886#ifdef AUDIO_POLICY_TEST
887    if (mCurOutput != 0) {
888        ALOGV("getOutput() test output mCurOutput %d, samplingRate %d, format %d, channelMask %x, mDirectOutput %d",
889                mCurOutput, mTestSamplingRate, mTestFormat, mTestChannels, mDirectOutput);
890
891        if (mTestOutputs[mCurOutput] == 0) {
892            ALOGV("getOutput() opening test output");
893            sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(NULL);
894            outputDesc->mDevice = mTestDevice;
895            outputDesc->mLatency = mTestLatencyMs;
896            outputDesc->mFlags =
897                    (audio_output_flags_t)(mDirectOutput ? AUDIO_OUTPUT_FLAG_DIRECT : 0);
898            outputDesc->mRefCount[stream] = 0;
899            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
900            config.sample_rate = mTestSamplingRate;
901            config.channel_mask = mTestChannels;
902            config.format = mTestFormat;
903            if (offloadInfo != NULL) {
904                config.offload_info = *offloadInfo;
905            }
906            status = mpClientInterface->openOutput(0,
907                                                  &mTestOutputs[mCurOutput],
908                                                  &config,
909                                                  &outputDesc->mDevice,
910                                                  String8(""),
911                                                  &outputDesc->mLatency,
912                                                  outputDesc->mFlags);
913            if (status == NO_ERROR) {
914                outputDesc->mSamplingRate = config.sample_rate;
915                outputDesc->mFormat = config.format;
916                outputDesc->mChannelMask = config.channel_mask;
917                AudioParameter outputCmd = AudioParameter();
918                outputCmd.addInt(String8("set_id"),mCurOutput);
919                mpClientInterface->setParameters(mTestOutputs[mCurOutput],outputCmd.toString());
920                addOutput(mTestOutputs[mCurOutput], outputDesc);
921            }
922        }
923        return mTestOutputs[mCurOutput];
924    }
925#endif //AUDIO_POLICY_TEST
926
927    // open a direct output if required by specified parameters
928    //force direct flag if offload flag is set: offloading implies a direct output stream
929    // and all common behaviors are driven by checking only the direct flag
930    // this should normally be set appropriately in the policy configuration file
931    if ((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
932        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_DIRECT);
933    }
934    if ((flags & AUDIO_OUTPUT_FLAG_HW_AV_SYNC) != 0) {
935        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_DIRECT);
936    }
937
938    sp<IOProfile> profile;
939
940    // skip direct output selection if the request can obviously be attached to a mixed output
941    // and not explicitly requested
942    if (((flags & AUDIO_OUTPUT_FLAG_DIRECT) == 0) &&
943            audio_is_linear_pcm(format) && samplingRate <= MAX_MIXER_SAMPLING_RATE &&
944            audio_channel_count_from_out_mask(channelMask) <= 2) {
945        goto non_direct_output;
946    }
947
948    // Do not allow offloading if one non offloadable effect is enabled. This prevents from
949    // creating an offloaded track and tearing it down immediately after start when audioflinger
950    // detects there is an active non offloadable effect.
951    // FIXME: We should check the audio session here but we do not have it in this context.
952    // This may prevent offloading in rare situations where effects are left active by apps
953    // in the background.
954
955    if (((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) == 0) ||
956            !isNonOffloadableEffectEnabled()) {
957        profile = getProfileForDirectOutput(device,
958                                           samplingRate,
959                                           format,
960                                           channelMask,
961                                           (audio_output_flags_t)flags);
962    }
963
964    if (profile != 0) {
965        sp<AudioOutputDescriptor> outputDesc = NULL;
966
967        for (size_t i = 0; i < mOutputs.size(); i++) {
968            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
969            if (!desc->isDuplicated() && (profile == desc->mProfile)) {
970                outputDesc = desc;
971                // reuse direct output if currently open and configured with same parameters
972                if ((samplingRate == outputDesc->mSamplingRate) &&
973                        (format == outputDesc->mFormat) &&
974                        (channelMask == outputDesc->mChannelMask)) {
975                    outputDesc->mDirectOpenCount++;
976                    ALOGV("getOutput() reusing direct output %d", mOutputs.keyAt(i));
977                    return mOutputs.keyAt(i);
978                }
979            }
980        }
981        // close direct output if currently open and configured with different parameters
982        if (outputDesc != NULL) {
983            closeOutput(outputDesc->mIoHandle);
984        }
985        outputDesc = new AudioOutputDescriptor(profile);
986        outputDesc->mDevice = device;
987        outputDesc->mLatency = 0;
988        outputDesc->mFlags =(audio_output_flags_t) (outputDesc->mFlags | flags);
989        audio_config_t config = AUDIO_CONFIG_INITIALIZER;
990        config.sample_rate = samplingRate;
991        config.channel_mask = channelMask;
992        config.format = format;
993        if (offloadInfo != NULL) {
994            config.offload_info = *offloadInfo;
995        }
996        status = mpClientInterface->openOutput(profile->mModule->mHandle,
997                                               &output,
998                                               &config,
999                                               &outputDesc->mDevice,
1000                                               String8(""),
1001                                               &outputDesc->mLatency,
1002                                               outputDesc->mFlags);
1003
1004        // only accept an output with the requested parameters
1005        if (status != NO_ERROR ||
1006            (samplingRate != 0 && samplingRate != config.sample_rate) ||
1007            (format != AUDIO_FORMAT_DEFAULT && format != config.format) ||
1008            (channelMask != 0 && channelMask != config.channel_mask)) {
1009            ALOGV("getOutput() failed opening direct output: output %d samplingRate %d %d,"
1010                    "format %d %d, channelMask %04x %04x", output, samplingRate,
1011                    outputDesc->mSamplingRate, format, outputDesc->mFormat, channelMask,
1012                    outputDesc->mChannelMask);
1013            if (output != AUDIO_IO_HANDLE_NONE) {
1014                mpClientInterface->closeOutput(output);
1015            }
1016            return AUDIO_IO_HANDLE_NONE;
1017        }
1018        outputDesc->mSamplingRate = config.sample_rate;
1019        outputDesc->mChannelMask = config.channel_mask;
1020        outputDesc->mFormat = config.format;
1021        outputDesc->mRefCount[stream] = 0;
1022        outputDesc->mStopTime[stream] = 0;
1023        outputDesc->mDirectOpenCount = 1;
1024
1025        audio_io_handle_t srcOutput = getOutputForEffect();
1026        addOutput(output, outputDesc);
1027        audio_io_handle_t dstOutput = getOutputForEffect();
1028        if (dstOutput == output) {
1029            mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, srcOutput, dstOutput);
1030        }
1031        mPreviousOutputs = mOutputs;
1032        ALOGV("getOutput() returns new direct output %d", output);
1033        mpClientInterface->onAudioPortListUpdate();
1034        return output;
1035    }
1036
1037non_direct_output:
1038
1039    // ignoring channel mask due to downmix capability in mixer
1040
1041    // open a non direct output
1042
1043    // for non direct outputs, only PCM is supported
1044    if (audio_is_linear_pcm(format)) {
1045        // get which output is suitable for the specified stream. The actual
1046        // routing change will happen when startOutput() will be called
1047        SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(device, mOutputs);
1048
1049        // at this stage we should ignore the DIRECT flag as no direct output could be found earlier
1050        flags = (audio_output_flags_t)(flags & ~AUDIO_OUTPUT_FLAG_DIRECT);
1051        output = selectOutput(outputs, flags, format);
1052    }
1053    ALOGW_IF((output == 0), "getOutput() could not find output for stream %d, samplingRate %d,"
1054            "format %d, channels %x, flags %x", stream, samplingRate, format, channelMask, flags);
1055
1056    ALOGV("getOutput() returns output %d", output);
1057
1058    return output;
1059}
1060
1061audio_io_handle_t AudioPolicyManager::selectOutput(const SortedVector<audio_io_handle_t>& outputs,
1062                                                       audio_output_flags_t flags,
1063                                                       audio_format_t format)
1064{
1065    // select one output among several that provide a path to a particular device or set of
1066    // devices (the list was previously build by getOutputsForDevice()).
1067    // The priority is as follows:
1068    // 1: the output with the highest number of requested policy flags
1069    // 2: the primary output
1070    // 3: the first output in the list
1071
1072    if (outputs.size() == 0) {
1073        return 0;
1074    }
1075    if (outputs.size() == 1) {
1076        return outputs[0];
1077    }
1078
1079    int maxCommonFlags = 0;
1080    audio_io_handle_t outputFlags = 0;
1081    audio_io_handle_t outputPrimary = 0;
1082
1083    for (size_t i = 0; i < outputs.size(); i++) {
1084        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(outputs[i]);
1085        if (!outputDesc->isDuplicated()) {
1086            // if a valid format is specified, skip output if not compatible
1087            if (format != AUDIO_FORMAT_INVALID) {
1088                if (outputDesc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) {
1089                    if (format != outputDesc->mFormat) {
1090                        continue;
1091                    }
1092                } else if (!audio_is_linear_pcm(format)) {
1093                    continue;
1094                }
1095            }
1096
1097            int commonFlags = popcount(outputDesc->mProfile->mFlags & flags);
1098            if (commonFlags > maxCommonFlags) {
1099                outputFlags = outputs[i];
1100                maxCommonFlags = commonFlags;
1101                ALOGV("selectOutput() commonFlags for output %d, %04x", outputs[i], commonFlags);
1102            }
1103            if (outputDesc->mProfile->mFlags & AUDIO_OUTPUT_FLAG_PRIMARY) {
1104                outputPrimary = outputs[i];
1105            }
1106        }
1107    }
1108
1109    if (outputFlags != 0) {
1110        return outputFlags;
1111    }
1112    if (outputPrimary != 0) {
1113        return outputPrimary;
1114    }
1115
1116    return outputs[0];
1117}
1118
1119status_t AudioPolicyManager::startOutput(audio_io_handle_t output,
1120                                             audio_stream_type_t stream,
1121                                             int session)
1122{
1123    ALOGV("startOutput() output %d, stream %d, session %d", output, stream, session);
1124    ssize_t index = mOutputs.indexOfKey(output);
1125    if (index < 0) {
1126        ALOGW("startOutput() unknown output %d", output);
1127        return BAD_VALUE;
1128    }
1129
1130    // cannot start playback of STREAM_TTS if any other output is being used
1131    uint32_t beaconMuteLatency = 0;
1132    if (stream == AUDIO_STREAM_TTS) {
1133        ALOGV("\t found BEACON stream");
1134        if (isAnyOutputActive(AUDIO_STREAM_TTS /*streamToIgnore*/)) {
1135            return INVALID_OPERATION;
1136        } else {
1137            beaconMuteLatency = handleEventForBeacon(STARTING_BEACON);
1138        }
1139    } else {
1140        // some playback other than beacon starts
1141        beaconMuteLatency = handleEventForBeacon(STARTING_OUTPUT);
1142    }
1143
1144    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1145
1146    // increment usage count for this stream on the requested output:
1147    // NOTE that the usage count is the same for duplicated output and hardware output which is
1148    // necessary for a correct control of hardware output routing by startOutput() and stopOutput()
1149    outputDesc->changeRefCount(stream, 1);
1150
1151    if (outputDesc->mRefCount[stream] == 1) {
1152        audio_devices_t newDevice = getNewOutputDevice(output, false /*fromCache*/);
1153        routing_strategy strategy = getStrategy(stream);
1154        bool shouldWait = (strategy == STRATEGY_SONIFICATION) ||
1155                            (strategy == STRATEGY_SONIFICATION_RESPECTFUL) ||
1156                            (beaconMuteLatency > 0);
1157        uint32_t waitMs = beaconMuteLatency;
1158        bool force = false;
1159        for (size_t i = 0; i < mOutputs.size(); i++) {
1160            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
1161            if (desc != outputDesc) {
1162                // force a device change if any other output is managed by the same hw
1163                // module and has a current device selection that differs from selected device.
1164                // In this case, the audio HAL must receive the new device selection so that it can
1165                // change the device currently selected by the other active output.
1166                if (outputDesc->sharesHwModuleWith(desc) &&
1167                    desc->device() != newDevice) {
1168                    force = true;
1169                }
1170                // wait for audio on other active outputs to be presented when starting
1171                // a notification so that audio focus effect can propagate, or that a mute/unmute
1172                // event occurred for beacon
1173                uint32_t latency = desc->latency();
1174                if (shouldWait && desc->isActive(latency * 2) && (waitMs < latency)) {
1175                    waitMs = latency;
1176                }
1177            }
1178        }
1179        uint32_t muteWaitMs = setOutputDevice(output, newDevice, force);
1180
1181        // handle special case for sonification while in call
1182        if (isInCall()) {
1183            handleIncallSonification(stream, true, false);
1184        }
1185
1186        // apply volume rules for current stream and device if necessary
1187        checkAndSetVolume(stream,
1188                          mStreams[stream].getVolumeIndex(newDevice),
1189                          output,
1190                          newDevice);
1191
1192        // update the outputs if starting an output with a stream that can affect notification
1193        // routing
1194        handleNotificationRoutingForStream(stream);
1195        if (waitMs > muteWaitMs) {
1196            usleep((waitMs - muteWaitMs) * 2 * 1000);
1197        }
1198    }
1199    return NO_ERROR;
1200}
1201
1202
1203status_t AudioPolicyManager::stopOutput(audio_io_handle_t output,
1204                                            audio_stream_type_t stream,
1205                                            int session)
1206{
1207    ALOGV("stopOutput() output %d, stream %d, session %d", output, stream, session);
1208    ssize_t index = mOutputs.indexOfKey(output);
1209    if (index < 0) {
1210        ALOGW("stopOutput() unknown output %d", output);
1211        return BAD_VALUE;
1212    }
1213
1214    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1215
1216    // always handle stream stop, check which stream type is stopping
1217    handleEventForBeacon(stream == AUDIO_STREAM_TTS ? STOPPING_BEACON : STOPPING_OUTPUT);
1218
1219    // handle special case for sonification while in call
1220    if (isInCall()) {
1221        handleIncallSonification(stream, false, false);
1222    }
1223
1224    if (outputDesc->mRefCount[stream] > 0) {
1225        // decrement usage count of this stream on the output
1226        outputDesc->changeRefCount(stream, -1);
1227        // store time at which the stream was stopped - see isStreamActive()
1228        if (outputDesc->mRefCount[stream] == 0) {
1229            outputDesc->mStopTime[stream] = systemTime();
1230            audio_devices_t newDevice = getNewOutputDevice(output, false /*fromCache*/);
1231            // delay the device switch by twice the latency because stopOutput() is executed when
1232            // the track stop() command is received and at that time the audio track buffer can
1233            // still contain data that needs to be drained. The latency only covers the audio HAL
1234            // and kernel buffers. Also the latency does not always include additional delay in the
1235            // audio path (audio DSP, CODEC ...)
1236            setOutputDevice(output, newDevice, false, outputDesc->mLatency*2);
1237
1238            // force restoring the device selection on other active outputs if it differs from the
1239            // one being selected for this output
1240            for (size_t i = 0; i < mOutputs.size(); i++) {
1241                audio_io_handle_t curOutput = mOutputs.keyAt(i);
1242                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
1243                if (curOutput != output &&
1244                        desc->isActive() &&
1245                        outputDesc->sharesHwModuleWith(desc) &&
1246                        (newDevice != desc->device())) {
1247                    setOutputDevice(curOutput,
1248                                    getNewOutputDevice(curOutput, false /*fromCache*/),
1249                                    true,
1250                                    outputDesc->mLatency*2);
1251                }
1252            }
1253            // update the outputs if stopping one with a stream that can affect notification routing
1254            handleNotificationRoutingForStream(stream);
1255        }
1256        return NO_ERROR;
1257    } else {
1258        ALOGW("stopOutput() refcount is already 0 for output %d", output);
1259        return INVALID_OPERATION;
1260    }
1261}
1262
1263void AudioPolicyManager::releaseOutput(audio_io_handle_t output)
1264{
1265    ALOGV("releaseOutput() %d", output);
1266    ssize_t index = mOutputs.indexOfKey(output);
1267    if (index < 0) {
1268        ALOGW("releaseOutput() releasing unknown output %d", output);
1269        return;
1270    }
1271
1272#ifdef AUDIO_POLICY_TEST
1273    int testIndex = testOutputIndex(output);
1274    if (testIndex != 0) {
1275        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1276        if (outputDesc->isActive()) {
1277            mpClientInterface->closeOutput(output);
1278            mOutputs.removeItem(output);
1279            mTestOutputs[testIndex] = 0;
1280        }
1281        return;
1282    }
1283#endif //AUDIO_POLICY_TEST
1284
1285    sp<AudioOutputDescriptor> desc = mOutputs.valueAt(index);
1286    if (desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) {
1287        if (desc->mDirectOpenCount <= 0) {
1288            ALOGW("releaseOutput() invalid open count %d for output %d",
1289                                                              desc->mDirectOpenCount, output);
1290            return;
1291        }
1292        if (--desc->mDirectOpenCount == 0) {
1293            closeOutput(output);
1294            // If effects where present on the output, audioflinger moved them to the primary
1295            // output by default: move them back to the appropriate output.
1296            audio_io_handle_t dstOutput = getOutputForEffect();
1297            if (dstOutput != mPrimaryOutput) {
1298                mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, mPrimaryOutput, dstOutput);
1299            }
1300            mpClientInterface->onAudioPortListUpdate();
1301        }
1302    }
1303}
1304
1305
1306audio_io_handle_t AudioPolicyManager::getInput(audio_source_t inputSource,
1307                                    uint32_t samplingRate,
1308                                    audio_format_t format,
1309                                    audio_channel_mask_t channelMask,
1310                                    audio_session_t session,
1311                                    audio_input_flags_t flags)
1312{
1313    ALOGV("getInput() inputSource %d, samplingRate %d, format %d, channelMask %x, session %d, "
1314          "flags %#x",
1315          inputSource, samplingRate, format, channelMask, session, flags);
1316
1317    audio_devices_t device = getDeviceForInputSource(inputSource);
1318
1319    if (device == AUDIO_DEVICE_NONE) {
1320        ALOGW("getInput() could not find device for inputSource %d", inputSource);
1321        return AUDIO_IO_HANDLE_NONE;
1322    }
1323
1324    // adapt channel selection to input source
1325    switch (inputSource) {
1326    case AUDIO_SOURCE_VOICE_UPLINK:
1327        channelMask = AUDIO_CHANNEL_IN_VOICE_UPLINK;
1328        break;
1329    case AUDIO_SOURCE_VOICE_DOWNLINK:
1330        channelMask = AUDIO_CHANNEL_IN_VOICE_DNLINK;
1331        break;
1332    case AUDIO_SOURCE_VOICE_CALL:
1333        channelMask = AUDIO_CHANNEL_IN_VOICE_UPLINK | AUDIO_CHANNEL_IN_VOICE_DNLINK;
1334        break;
1335    default:
1336        break;
1337    }
1338
1339    audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
1340    bool isSoundTrigger = false;
1341    audio_source_t halInputSource = inputSource;
1342    if (inputSource == AUDIO_SOURCE_HOTWORD) {
1343        ssize_t index = mSoundTriggerSessions.indexOfKey(session);
1344        if (index >= 0) {
1345            input = mSoundTriggerSessions.valueFor(session);
1346            isSoundTrigger = true;
1347            flags = (audio_input_flags_t)(flags | AUDIO_INPUT_FLAG_HW_HOTWORD);
1348            ALOGV("SoundTrigger capture on session %d input %d", session, input);
1349        } else {
1350            halInputSource = AUDIO_SOURCE_VOICE_RECOGNITION;
1351        }
1352    }
1353
1354    sp<IOProfile> profile = getInputProfile(device,
1355                                         samplingRate,
1356                                         format,
1357                                         channelMask,
1358                                         flags);
1359    if (profile == 0) {
1360        //retry without flags
1361        audio_input_flags_t log_flags = flags;
1362        flags = AUDIO_INPUT_FLAG_NONE;
1363        profile = getInputProfile(device,
1364                                 samplingRate,
1365                                 format,
1366                                 channelMask,
1367                                 flags);
1368        if (profile == 0) {
1369            ALOGW("getInput() could not find profile for device 0x%X, samplingRate %u, format %#x, "
1370                    "channelMask 0x%X, flags %#x",
1371                    device, samplingRate, format, channelMask, log_flags);
1372            return AUDIO_IO_HANDLE_NONE;
1373        }
1374    }
1375
1376    if (profile->mModule->mHandle == 0) {
1377        ALOGE("getInput(): HW module %s not opened", profile->mModule->mName);
1378        return AUDIO_IO_HANDLE_NONE;
1379    }
1380
1381    audio_config_t config = AUDIO_CONFIG_INITIALIZER;
1382    config.sample_rate = samplingRate;
1383    config.channel_mask = channelMask;
1384    config.format = format;
1385
1386    // handle legacy remote submix case where the address was not always specified
1387    String8 address = deviceDistinguishesOnAddress(device) ? String8("0") : String8("");
1388
1389    status_t status = mpClientInterface->openInput(profile->mModule->mHandle,
1390                                                   &input,
1391                                                   &config,
1392                                                   &device,
1393                                                   address,
1394                                                   halInputSource,
1395                                                   flags);
1396
1397    // only accept input with the exact requested set of parameters
1398    if (status != NO_ERROR ||
1399        (samplingRate != config.sample_rate) ||
1400        (format != config.format) ||
1401        (channelMask != config.channel_mask)) {
1402        ALOGW("getInput() failed opening input: samplingRate %d, format %d, channelMask %x",
1403                samplingRate, format, channelMask);
1404        if (input != AUDIO_IO_HANDLE_NONE) {
1405            mpClientInterface->closeInput(input);
1406        }
1407        return AUDIO_IO_HANDLE_NONE;
1408    }
1409
1410    sp<AudioInputDescriptor> inputDesc = new AudioInputDescriptor(profile);
1411    inputDesc->mInputSource = inputSource;
1412    inputDesc->mRefCount = 0;
1413    inputDesc->mOpenRefCount = 1;
1414    inputDesc->mSamplingRate = samplingRate;
1415    inputDesc->mFormat = format;
1416    inputDesc->mChannelMask = channelMask;
1417    inputDesc->mDevice = device;
1418    inputDesc->mSessions.add(session);
1419    inputDesc->mIsSoundTrigger = isSoundTrigger;
1420
1421    addInput(input, inputDesc);
1422    mpClientInterface->onAudioPortListUpdate();
1423    return input;
1424}
1425
1426status_t AudioPolicyManager::startInput(audio_io_handle_t input,
1427                                        audio_session_t session)
1428{
1429    ALOGV("startInput() input %d", input);
1430    ssize_t index = mInputs.indexOfKey(input);
1431    if (index < 0) {
1432        ALOGW("startInput() unknown input %d", input);
1433        return BAD_VALUE;
1434    }
1435    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1436
1437    index = inputDesc->mSessions.indexOf(session);
1438    if (index < 0) {
1439        ALOGW("startInput() unknown session %d on input %d", session, input);
1440        return BAD_VALUE;
1441    }
1442
1443    // virtual input devices are compatible with other input devices
1444    if (!isVirtualInputDevice(inputDesc->mDevice)) {
1445
1446        // for a non-virtual input device, check if there is another (non-virtual) active input
1447        audio_io_handle_t activeInput = getActiveInput();
1448        if (activeInput != 0 && activeInput != input) {
1449
1450            // If the already active input uses AUDIO_SOURCE_HOTWORD then it is closed,
1451            // otherwise the active input continues and the new input cannot be started.
1452            sp<AudioInputDescriptor> activeDesc = mInputs.valueFor(activeInput);
1453            if (activeDesc->mInputSource == AUDIO_SOURCE_HOTWORD) {
1454                ALOGW("startInput(%d) preempting low-priority input %d", input, activeInput);
1455                stopInput(activeInput, activeDesc->mSessions.itemAt(0));
1456                releaseInput(activeInput, activeDesc->mSessions.itemAt(0));
1457            } else {
1458                ALOGE("startInput(%d) failed: other input %d already started", input, activeInput);
1459                return INVALID_OPERATION;
1460            }
1461        }
1462    }
1463
1464    if (inputDesc->mRefCount == 0) {
1465        if (activeInputsCount() == 0) {
1466            SoundTrigger::setCaptureState(true);
1467        }
1468        setInputDevice(input, getNewInputDevice(input), true /* force */);
1469
1470        // Automatically enable the remote submix output when input is started.
1471        // For remote submix (a virtual device), we open only one input per capture request.
1472        if (audio_is_remote_submix_device(inputDesc->mDevice)) {
1473            setDeviceConnectionState(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
1474                    AUDIO_POLICY_DEVICE_STATE_AVAILABLE, AUDIO_REMOTE_SUBMIX_DEVICE_ADDRESS);
1475        }
1476    }
1477
1478    ALOGV("AudioPolicyManager::startInput() input source = %d", inputDesc->mInputSource);
1479
1480    inputDesc->mRefCount++;
1481    return NO_ERROR;
1482}
1483
1484status_t AudioPolicyManager::stopInput(audio_io_handle_t input,
1485                                       audio_session_t session)
1486{
1487    ALOGV("stopInput() input %d", input);
1488    ssize_t index = mInputs.indexOfKey(input);
1489    if (index < 0) {
1490        ALOGW("stopInput() unknown input %d", input);
1491        return BAD_VALUE;
1492    }
1493    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1494
1495    index = inputDesc->mSessions.indexOf(session);
1496    if (index < 0) {
1497        ALOGW("stopInput() unknown session %d on input %d", session, input);
1498        return BAD_VALUE;
1499    }
1500
1501    if (inputDesc->mRefCount == 0) {
1502        ALOGW("stopInput() input %d already stopped", input);
1503        return INVALID_OPERATION;
1504    }
1505
1506    inputDesc->mRefCount--;
1507    if (inputDesc->mRefCount == 0) {
1508
1509        // automatically disable the remote submix output when input is stopped
1510        if (audio_is_remote_submix_device(inputDesc->mDevice)) {
1511            setDeviceConnectionState(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
1512                    AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE, AUDIO_REMOTE_SUBMIX_DEVICE_ADDRESS);
1513        }
1514
1515        resetInputDevice(input);
1516
1517        if (activeInputsCount() == 0) {
1518            SoundTrigger::setCaptureState(false);
1519        }
1520    }
1521    return NO_ERROR;
1522}
1523
1524void AudioPolicyManager::releaseInput(audio_io_handle_t input,
1525                                      audio_session_t session)
1526{
1527    ALOGV("releaseInput() %d", input);
1528    ssize_t index = mInputs.indexOfKey(input);
1529    if (index < 0) {
1530        ALOGW("releaseInput() releasing unknown input %d", input);
1531        return;
1532    }
1533    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1534    ALOG_ASSERT(inputDesc != 0);
1535
1536    index = inputDesc->mSessions.indexOf(session);
1537    if (index < 0) {
1538        ALOGW("releaseInput() unknown session %d on input %d", session, input);
1539        return;
1540    }
1541    inputDesc->mSessions.remove(session);
1542    if (inputDesc->mOpenRefCount == 0) {
1543        ALOGW("releaseInput() invalid open ref count %d", inputDesc->mOpenRefCount);
1544        return;
1545    }
1546    inputDesc->mOpenRefCount--;
1547    if (inputDesc->mOpenRefCount > 0) {
1548        ALOGV("releaseInput() exit > 0");
1549        return;
1550    }
1551
1552    closeInput(input);
1553    mpClientInterface->onAudioPortListUpdate();
1554    ALOGV("releaseInput() exit");
1555}
1556
1557void AudioPolicyManager::closeAllInputs() {
1558    bool patchRemoved = false;
1559
1560    for(size_t input_index = 0; input_index < mInputs.size(); input_index++) {
1561        sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(input_index);
1562        ssize_t patch_index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
1563        if (patch_index >= 0) {
1564            sp<AudioPatch> patchDesc = mAudioPatches.valueAt(patch_index);
1565            status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
1566            mAudioPatches.removeItemsAt(patch_index);
1567            patchRemoved = true;
1568        }
1569        mpClientInterface->closeInput(mInputs.keyAt(input_index));
1570    }
1571    mInputs.clear();
1572    nextAudioPortGeneration();
1573
1574    if (patchRemoved) {
1575        mpClientInterface->onAudioPatchListUpdate();
1576    }
1577}
1578
1579void AudioPolicyManager::initStreamVolume(audio_stream_type_t stream,
1580                                            int indexMin,
1581                                            int indexMax)
1582{
1583    ALOGV("initStreamVolume() stream %d, min %d, max %d", stream , indexMin, indexMax);
1584    if (indexMin < 0 || indexMin >= indexMax) {
1585        ALOGW("initStreamVolume() invalid index limits for stream %d, min %d, max %d", stream , indexMin, indexMax);
1586        return;
1587    }
1588    mStreams[stream].mIndexMin = indexMin;
1589    mStreams[stream].mIndexMax = indexMax;
1590}
1591
1592status_t AudioPolicyManager::setStreamVolumeIndex(audio_stream_type_t stream,
1593                                                      int index,
1594                                                      audio_devices_t device)
1595{
1596
1597    if ((index < mStreams[stream].mIndexMin) || (index > mStreams[stream].mIndexMax)) {
1598        return BAD_VALUE;
1599    }
1600    if (!audio_is_output_device(device)) {
1601        return BAD_VALUE;
1602    }
1603
1604    // Force max volume if stream cannot be muted
1605    if (!mStreams[stream].mCanBeMuted) index = mStreams[stream].mIndexMax;
1606
1607    ALOGV("setStreamVolumeIndex() stream %d, device %04x, index %d",
1608          stream, device, index);
1609
1610    // if device is AUDIO_DEVICE_OUT_DEFAULT set default value and
1611    // clear all device specific values
1612    if (device == AUDIO_DEVICE_OUT_DEFAULT) {
1613        mStreams[stream].mIndexCur.clear();
1614    }
1615    mStreams[stream].mIndexCur.add(device, index);
1616
1617    // update volume on all outputs whose current device is also selected by the same
1618    // strategy as the device specified by the caller
1619    audio_devices_t strategyDevice = getDeviceForStrategy(getStrategy(stream), true /*fromCache*/);
1620    if ((device != AUDIO_DEVICE_OUT_DEFAULT) && (device & strategyDevice) == 0) {
1621        return NO_ERROR;
1622    }
1623    status_t status = NO_ERROR;
1624    for (size_t i = 0; i < mOutputs.size(); i++) {
1625        audio_devices_t curDevice =
1626                getDeviceForVolume(mOutputs.valueAt(i)->device());
1627        if ((device == AUDIO_DEVICE_OUT_DEFAULT) || ((curDevice & strategyDevice) != 0)) {
1628            status_t volStatus = checkAndSetVolume(stream, index, mOutputs.keyAt(i), curDevice);
1629            if (volStatus != NO_ERROR) {
1630                status = volStatus;
1631            }
1632        }
1633    }
1634    return status;
1635}
1636
1637status_t AudioPolicyManager::getStreamVolumeIndex(audio_stream_type_t stream,
1638                                                      int *index,
1639                                                      audio_devices_t device)
1640{
1641    if (index == NULL) {
1642        return BAD_VALUE;
1643    }
1644    if (!audio_is_output_device(device)) {
1645        return BAD_VALUE;
1646    }
1647    // if device is AUDIO_DEVICE_OUT_DEFAULT, return volume for device corresponding to
1648    // the strategy the stream belongs to.
1649    if (device == AUDIO_DEVICE_OUT_DEFAULT) {
1650        device = getDeviceForStrategy(getStrategy(stream), true /*fromCache*/);
1651    }
1652    device = getDeviceForVolume(device);
1653
1654    *index =  mStreams[stream].getVolumeIndex(device);
1655    ALOGV("getStreamVolumeIndex() stream %d device %08x index %d", stream, device, *index);
1656    return NO_ERROR;
1657}
1658
1659audio_io_handle_t AudioPolicyManager::selectOutputForEffects(
1660                                            const SortedVector<audio_io_handle_t>& outputs)
1661{
1662    // select one output among several suitable for global effects.
1663    // The priority is as follows:
1664    // 1: An offloaded output. If the effect ends up not being offloadable,
1665    //    AudioFlinger will invalidate the track and the offloaded output
1666    //    will be closed causing the effect to be moved to a PCM output.
1667    // 2: A deep buffer output
1668    // 3: the first output in the list
1669
1670    if (outputs.size() == 0) {
1671        return 0;
1672    }
1673
1674    audio_io_handle_t outputOffloaded = 0;
1675    audio_io_handle_t outputDeepBuffer = 0;
1676
1677    for (size_t i = 0; i < outputs.size(); i++) {
1678        sp<AudioOutputDescriptor> desc = mOutputs.valueFor(outputs[i]);
1679        ALOGV("selectOutputForEffects outputs[%zu] flags %x", i, desc->mFlags);
1680        if ((desc->mFlags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
1681            outputOffloaded = outputs[i];
1682        }
1683        if ((desc->mFlags & AUDIO_OUTPUT_FLAG_DEEP_BUFFER) != 0) {
1684            outputDeepBuffer = outputs[i];
1685        }
1686    }
1687
1688    ALOGV("selectOutputForEffects outputOffloaded %d outputDeepBuffer %d",
1689          outputOffloaded, outputDeepBuffer);
1690    if (outputOffloaded != 0) {
1691        return outputOffloaded;
1692    }
1693    if (outputDeepBuffer != 0) {
1694        return outputDeepBuffer;
1695    }
1696
1697    return outputs[0];
1698}
1699
1700audio_io_handle_t AudioPolicyManager::getOutputForEffect(const effect_descriptor_t *desc)
1701{
1702    // apply simple rule where global effects are attached to the same output as MUSIC streams
1703
1704    routing_strategy strategy = getStrategy(AUDIO_STREAM_MUSIC);
1705    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
1706    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(device, mOutputs);
1707
1708    audio_io_handle_t output = selectOutputForEffects(dstOutputs);
1709    ALOGV("getOutputForEffect() got output %d for fx %s flags %x",
1710          output, (desc == NULL) ? "unspecified" : desc->name,  (desc == NULL) ? 0 : desc->flags);
1711
1712    return output;
1713}
1714
1715status_t AudioPolicyManager::registerEffect(const effect_descriptor_t *desc,
1716                                audio_io_handle_t io,
1717                                uint32_t strategy,
1718                                int session,
1719                                int id)
1720{
1721    ssize_t index = mOutputs.indexOfKey(io);
1722    if (index < 0) {
1723        index = mInputs.indexOfKey(io);
1724        if (index < 0) {
1725            ALOGW("registerEffect() unknown io %d", io);
1726            return INVALID_OPERATION;
1727        }
1728    }
1729
1730    if (mTotalEffectsMemory + desc->memoryUsage > getMaxEffectsMemory()) {
1731        ALOGW("registerEffect() memory limit exceeded for Fx %s, Memory %d KB",
1732                desc->name, desc->memoryUsage);
1733        return INVALID_OPERATION;
1734    }
1735    mTotalEffectsMemory += desc->memoryUsage;
1736    ALOGV("registerEffect() effect %s, io %d, strategy %d session %d id %d",
1737            desc->name, io, strategy, session, id);
1738    ALOGV("registerEffect() memory %d, total memory %d", desc->memoryUsage, mTotalEffectsMemory);
1739
1740    sp<EffectDescriptor> effectDesc = new EffectDescriptor();
1741    memcpy (&effectDesc->mDesc, desc, sizeof(effect_descriptor_t));
1742    effectDesc->mIo = io;
1743    effectDesc->mStrategy = (routing_strategy)strategy;
1744    effectDesc->mSession = session;
1745    effectDesc->mEnabled = false;
1746
1747    mEffects.add(id, effectDesc);
1748
1749    return NO_ERROR;
1750}
1751
1752status_t AudioPolicyManager::unregisterEffect(int id)
1753{
1754    ssize_t index = mEffects.indexOfKey(id);
1755    if (index < 0) {
1756        ALOGW("unregisterEffect() unknown effect ID %d", id);
1757        return INVALID_OPERATION;
1758    }
1759
1760    sp<EffectDescriptor> effectDesc = mEffects.valueAt(index);
1761
1762    setEffectEnabled(effectDesc, false);
1763
1764    if (mTotalEffectsMemory < effectDesc->mDesc.memoryUsage) {
1765        ALOGW("unregisterEffect() memory %d too big for total %d",
1766                effectDesc->mDesc.memoryUsage, mTotalEffectsMemory);
1767        effectDesc->mDesc.memoryUsage = mTotalEffectsMemory;
1768    }
1769    mTotalEffectsMemory -= effectDesc->mDesc.memoryUsage;
1770    ALOGV("unregisterEffect() effect %s, ID %d, memory %d total memory %d",
1771            effectDesc->mDesc.name, id, effectDesc->mDesc.memoryUsage, mTotalEffectsMemory);
1772
1773    mEffects.removeItem(id);
1774
1775    return NO_ERROR;
1776}
1777
1778status_t AudioPolicyManager::setEffectEnabled(int id, bool enabled)
1779{
1780    ssize_t index = mEffects.indexOfKey(id);
1781    if (index < 0) {
1782        ALOGW("unregisterEffect() unknown effect ID %d", id);
1783        return INVALID_OPERATION;
1784    }
1785
1786    return setEffectEnabled(mEffects.valueAt(index), enabled);
1787}
1788
1789status_t AudioPolicyManager::setEffectEnabled(const sp<EffectDescriptor>& effectDesc, bool enabled)
1790{
1791    if (enabled == effectDesc->mEnabled) {
1792        ALOGV("setEffectEnabled(%s) effect already %s",
1793             enabled?"true":"false", enabled?"enabled":"disabled");
1794        return INVALID_OPERATION;
1795    }
1796
1797    if (enabled) {
1798        if (mTotalEffectsCpuLoad + effectDesc->mDesc.cpuLoad > getMaxEffectsCpuLoad()) {
1799            ALOGW("setEffectEnabled(true) CPU Load limit exceeded for Fx %s, CPU %f MIPS",
1800                 effectDesc->mDesc.name, (float)effectDesc->mDesc.cpuLoad/10);
1801            return INVALID_OPERATION;
1802        }
1803        mTotalEffectsCpuLoad += effectDesc->mDesc.cpuLoad;
1804        ALOGV("setEffectEnabled(true) total CPU %d", mTotalEffectsCpuLoad);
1805    } else {
1806        if (mTotalEffectsCpuLoad < effectDesc->mDesc.cpuLoad) {
1807            ALOGW("setEffectEnabled(false) CPU load %d too high for total %d",
1808                    effectDesc->mDesc.cpuLoad, mTotalEffectsCpuLoad);
1809            effectDesc->mDesc.cpuLoad = mTotalEffectsCpuLoad;
1810        }
1811        mTotalEffectsCpuLoad -= effectDesc->mDesc.cpuLoad;
1812        ALOGV("setEffectEnabled(false) total CPU %d", mTotalEffectsCpuLoad);
1813    }
1814    effectDesc->mEnabled = enabled;
1815    return NO_ERROR;
1816}
1817
1818bool AudioPolicyManager::isNonOffloadableEffectEnabled()
1819{
1820    for (size_t i = 0; i < mEffects.size(); i++) {
1821        sp<EffectDescriptor> effectDesc = mEffects.valueAt(i);
1822        if (effectDesc->mEnabled && (effectDesc->mStrategy == STRATEGY_MEDIA) &&
1823                ((effectDesc->mDesc.flags & EFFECT_FLAG_OFFLOAD_SUPPORTED) == 0)) {
1824            ALOGV("isNonOffloadableEffectEnabled() non offloadable effect %s enabled on session %d",
1825                  effectDesc->mDesc.name, effectDesc->mSession);
1826            return true;
1827        }
1828    }
1829    return false;
1830}
1831
1832bool AudioPolicyManager::isStreamActive(audio_stream_type_t stream, uint32_t inPastMs) const
1833{
1834    nsecs_t sysTime = systemTime();
1835    for (size_t i = 0; i < mOutputs.size(); i++) {
1836        const sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
1837        if (outputDesc->isStreamActive(stream, inPastMs, sysTime)) {
1838            return true;
1839        }
1840    }
1841    return false;
1842}
1843
1844bool AudioPolicyManager::isStreamActiveRemotely(audio_stream_type_t stream,
1845                                                    uint32_t inPastMs) const
1846{
1847    nsecs_t sysTime = systemTime();
1848    for (size_t i = 0; i < mOutputs.size(); i++) {
1849        const sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
1850        if (((outputDesc->device() & APM_AUDIO_OUT_DEVICE_REMOTE_ALL) != 0) &&
1851                outputDesc->isStreamActive(stream, inPastMs, sysTime)) {
1852            return true;
1853        }
1854    }
1855    return false;
1856}
1857
1858bool AudioPolicyManager::isSourceActive(audio_source_t source) const
1859{
1860    for (size_t i = 0; i < mInputs.size(); i++) {
1861        const sp<AudioInputDescriptor>  inputDescriptor = mInputs.valueAt(i);
1862        if ((inputDescriptor->mInputSource == (int)source ||
1863                (source == AUDIO_SOURCE_VOICE_RECOGNITION &&
1864                 inputDescriptor->mInputSource == AUDIO_SOURCE_HOTWORD))
1865             && (inputDescriptor->mRefCount > 0)) {
1866            return true;
1867        }
1868    }
1869    return false;
1870}
1871
1872
1873status_t AudioPolicyManager::dump(int fd)
1874{
1875    const size_t SIZE = 256;
1876    char buffer[SIZE];
1877    String8 result;
1878
1879    snprintf(buffer, SIZE, "\nAudioPolicyManager Dump: %p\n", this);
1880    result.append(buffer);
1881
1882    snprintf(buffer, SIZE, " Primary Output: %d\n", mPrimaryOutput);
1883    result.append(buffer);
1884    snprintf(buffer, SIZE, " Phone state: %d\n", mPhoneState);
1885    result.append(buffer);
1886    snprintf(buffer, SIZE, " Force use for communications %d\n",
1887             mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]);
1888    result.append(buffer);
1889    snprintf(buffer, SIZE, " Force use for media %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA]);
1890    result.append(buffer);
1891    snprintf(buffer, SIZE, " Force use for record %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD]);
1892    result.append(buffer);
1893    snprintf(buffer, SIZE, " Force use for dock %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_DOCK]);
1894    result.append(buffer);
1895    snprintf(buffer, SIZE, " Force use for system %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM]);
1896    result.append(buffer);
1897    snprintf(buffer, SIZE, " Force use for hdmi system audio %d\n",
1898            mForceUse[AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO]);
1899    result.append(buffer);
1900
1901    snprintf(buffer, SIZE, " Available output devices:\n");
1902    result.append(buffer);
1903    write(fd, result.string(), result.size());
1904    for (size_t i = 0; i < mAvailableOutputDevices.size(); i++) {
1905        mAvailableOutputDevices[i]->dump(fd, 2, i);
1906    }
1907    snprintf(buffer, SIZE, "\n Available input devices:\n");
1908    write(fd, buffer, strlen(buffer));
1909    for (size_t i = 0; i < mAvailableInputDevices.size(); i++) {
1910        mAvailableInputDevices[i]->dump(fd, 2, i);
1911    }
1912
1913    snprintf(buffer, SIZE, "\nHW Modules dump:\n");
1914    write(fd, buffer, strlen(buffer));
1915    for (size_t i = 0; i < mHwModules.size(); i++) {
1916        snprintf(buffer, SIZE, "- HW Module %zu:\n", i + 1);
1917        write(fd, buffer, strlen(buffer));
1918        mHwModules[i]->dump(fd);
1919    }
1920
1921    snprintf(buffer, SIZE, "\nOutputs dump:\n");
1922    write(fd, buffer, strlen(buffer));
1923    for (size_t i = 0; i < mOutputs.size(); i++) {
1924        snprintf(buffer, SIZE, "- Output %d dump:\n", mOutputs.keyAt(i));
1925        write(fd, buffer, strlen(buffer));
1926        mOutputs.valueAt(i)->dump(fd);
1927    }
1928
1929    snprintf(buffer, SIZE, "\nInputs dump:\n");
1930    write(fd, buffer, strlen(buffer));
1931    for (size_t i = 0; i < mInputs.size(); i++) {
1932        snprintf(buffer, SIZE, "- Input %d dump:\n", mInputs.keyAt(i));
1933        write(fd, buffer, strlen(buffer));
1934        mInputs.valueAt(i)->dump(fd);
1935    }
1936
1937    snprintf(buffer, SIZE, "\nStreams dump:\n");
1938    write(fd, buffer, strlen(buffer));
1939    snprintf(buffer, SIZE,
1940             " Stream  Can be muted  Index Min  Index Max  Index Cur [device : index]...\n");
1941    write(fd, buffer, strlen(buffer));
1942    for (size_t i = 0; i < AUDIO_STREAM_CNT; i++) {
1943        snprintf(buffer, SIZE, " %02zu      ", i);
1944        write(fd, buffer, strlen(buffer));
1945        mStreams[i].dump(fd);
1946    }
1947
1948    snprintf(buffer, SIZE, "\nTotal Effects CPU: %f MIPS, Total Effects memory: %d KB\n",
1949            (float)mTotalEffectsCpuLoad/10, mTotalEffectsMemory);
1950    write(fd, buffer, strlen(buffer));
1951
1952    snprintf(buffer, SIZE, "Registered effects:\n");
1953    write(fd, buffer, strlen(buffer));
1954    for (size_t i = 0; i < mEffects.size(); i++) {
1955        snprintf(buffer, SIZE, "- Effect %d dump:\n", mEffects.keyAt(i));
1956        write(fd, buffer, strlen(buffer));
1957        mEffects.valueAt(i)->dump(fd);
1958    }
1959
1960    snprintf(buffer, SIZE, "\nAudio Patches:\n");
1961    write(fd, buffer, strlen(buffer));
1962    for (size_t i = 0; i < mAudioPatches.size(); i++) {
1963        mAudioPatches[i]->dump(fd, 2, i);
1964    }
1965
1966    return NO_ERROR;
1967}
1968
1969// This function checks for the parameters which can be offloaded.
1970// This can be enhanced depending on the capability of the DSP and policy
1971// of the system.
1972bool AudioPolicyManager::isOffloadSupported(const audio_offload_info_t& offloadInfo)
1973{
1974    ALOGV("isOffloadSupported: SR=%u, CM=0x%x, Format=0x%x, StreamType=%d,"
1975     " BitRate=%u, duration=%" PRId64 " us, has_video=%d",
1976     offloadInfo.sample_rate, offloadInfo.channel_mask,
1977     offloadInfo.format,
1978     offloadInfo.stream_type, offloadInfo.bit_rate, offloadInfo.duration_us,
1979     offloadInfo.has_video);
1980
1981    // Check if offload has been disabled
1982    char propValue[PROPERTY_VALUE_MAX];
1983    if (property_get("audio.offload.disable", propValue, "0")) {
1984        if (atoi(propValue) != 0) {
1985            ALOGV("offload disabled by audio.offload.disable=%s", propValue );
1986            return false;
1987        }
1988    }
1989
1990    // Check if stream type is music, then only allow offload as of now.
1991    if (offloadInfo.stream_type != AUDIO_STREAM_MUSIC)
1992    {
1993        ALOGV("isOffloadSupported: stream_type != MUSIC, returning false");
1994        return false;
1995    }
1996
1997    //TODO: enable audio offloading with video when ready
1998    if (offloadInfo.has_video)
1999    {
2000        ALOGV("isOffloadSupported: has_video == true, returning false");
2001        return false;
2002    }
2003
2004    //If duration is less than minimum value defined in property, return false
2005    if (property_get("audio.offload.min.duration.secs", propValue, NULL)) {
2006        if (offloadInfo.duration_us < (atoi(propValue) * 1000000 )) {
2007            ALOGV("Offload denied by duration < audio.offload.min.duration.secs(=%s)", propValue);
2008            return false;
2009        }
2010    } else if (offloadInfo.duration_us < OFFLOAD_DEFAULT_MIN_DURATION_SECS * 1000000) {
2011        ALOGV("Offload denied by duration < default min(=%u)", OFFLOAD_DEFAULT_MIN_DURATION_SECS);
2012        return false;
2013    }
2014
2015    // Do not allow offloading if one non offloadable effect is enabled. This prevents from
2016    // creating an offloaded track and tearing it down immediately after start when audioflinger
2017    // detects there is an active non offloadable effect.
2018    // FIXME: We should check the audio session here but we do not have it in this context.
2019    // This may prevent offloading in rare situations where effects are left active by apps
2020    // in the background.
2021    if (isNonOffloadableEffectEnabled()) {
2022        return false;
2023    }
2024
2025    // See if there is a profile to support this.
2026    // AUDIO_DEVICE_NONE
2027    sp<IOProfile> profile = getProfileForDirectOutput(AUDIO_DEVICE_NONE /*ignore device */,
2028                                            offloadInfo.sample_rate,
2029                                            offloadInfo.format,
2030                                            offloadInfo.channel_mask,
2031                                            AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD);
2032    ALOGV("isOffloadSupported() profile %sfound", profile != 0 ? "" : "NOT ");
2033    return (profile != 0);
2034}
2035
2036status_t AudioPolicyManager::listAudioPorts(audio_port_role_t role,
2037                                            audio_port_type_t type,
2038                                            unsigned int *num_ports,
2039                                            struct audio_port *ports,
2040                                            unsigned int *generation)
2041{
2042    if (num_ports == NULL || (*num_ports != 0 && ports == NULL) ||
2043            generation == NULL) {
2044        return BAD_VALUE;
2045    }
2046    ALOGV("listAudioPorts() role %d type %d num_ports %d ports %p", role, type, *num_ports, ports);
2047    if (ports == NULL) {
2048        *num_ports = 0;
2049    }
2050
2051    size_t portsWritten = 0;
2052    size_t portsMax = *num_ports;
2053    *num_ports = 0;
2054    if (type == AUDIO_PORT_TYPE_NONE || type == AUDIO_PORT_TYPE_DEVICE) {
2055        if (role == AUDIO_PORT_ROLE_SINK || role == AUDIO_PORT_ROLE_NONE) {
2056            for (size_t i = 0;
2057                    i  < mAvailableOutputDevices.size() && portsWritten < portsMax; i++) {
2058                mAvailableOutputDevices[i]->toAudioPort(&ports[portsWritten++]);
2059            }
2060            *num_ports += mAvailableOutputDevices.size();
2061        }
2062        if (role == AUDIO_PORT_ROLE_SOURCE || role == AUDIO_PORT_ROLE_NONE) {
2063            for (size_t i = 0;
2064                    i  < mAvailableInputDevices.size() && portsWritten < portsMax; i++) {
2065                mAvailableInputDevices[i]->toAudioPort(&ports[portsWritten++]);
2066            }
2067            *num_ports += mAvailableInputDevices.size();
2068        }
2069    }
2070    if (type == AUDIO_PORT_TYPE_NONE || type == AUDIO_PORT_TYPE_MIX) {
2071        if (role == AUDIO_PORT_ROLE_SINK || role == AUDIO_PORT_ROLE_NONE) {
2072            for (size_t i = 0; i < mInputs.size() && portsWritten < portsMax; i++) {
2073                mInputs[i]->toAudioPort(&ports[portsWritten++]);
2074            }
2075            *num_ports += mInputs.size();
2076        }
2077        if (role == AUDIO_PORT_ROLE_SOURCE || role == AUDIO_PORT_ROLE_NONE) {
2078            size_t numOutputs = 0;
2079            for (size_t i = 0; i < mOutputs.size(); i++) {
2080                if (!mOutputs[i]->isDuplicated()) {
2081                    numOutputs++;
2082                    if (portsWritten < portsMax) {
2083                        mOutputs[i]->toAudioPort(&ports[portsWritten++]);
2084                    }
2085                }
2086            }
2087            *num_ports += numOutputs;
2088        }
2089    }
2090    *generation = curAudioPortGeneration();
2091    ALOGV("listAudioPorts() got %zu ports needed %d", portsWritten, *num_ports);
2092    return NO_ERROR;
2093}
2094
2095status_t AudioPolicyManager::getAudioPort(struct audio_port *port __unused)
2096{
2097    return NO_ERROR;
2098}
2099
2100sp<AudioPolicyManager::AudioOutputDescriptor> AudioPolicyManager::getOutputFromId(
2101                                                                    audio_port_handle_t id) const
2102{
2103    sp<AudioOutputDescriptor> outputDesc = NULL;
2104    for (size_t i = 0; i < mOutputs.size(); i++) {
2105        outputDesc = mOutputs.valueAt(i);
2106        if (outputDesc->mId == id) {
2107            break;
2108        }
2109    }
2110    return outputDesc;
2111}
2112
2113sp<AudioPolicyManager::AudioInputDescriptor> AudioPolicyManager::getInputFromId(
2114                                                                    audio_port_handle_t id) const
2115{
2116    sp<AudioInputDescriptor> inputDesc = NULL;
2117    for (size_t i = 0; i < mInputs.size(); i++) {
2118        inputDesc = mInputs.valueAt(i);
2119        if (inputDesc->mId == id) {
2120            break;
2121        }
2122    }
2123    return inputDesc;
2124}
2125
2126sp <AudioPolicyManager::HwModule> AudioPolicyManager::getModuleForDevice(
2127                                                                    audio_devices_t device) const
2128{
2129    sp <HwModule> module;
2130
2131    for (size_t i = 0; i < mHwModules.size(); i++) {
2132        if (mHwModules[i]->mHandle == 0) {
2133            continue;
2134        }
2135        if (audio_is_output_device(device)) {
2136            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
2137            {
2138                if (mHwModules[i]->mOutputProfiles[j]->mSupportedDevices.types() & device) {
2139                    return mHwModules[i];
2140                }
2141            }
2142        } else {
2143            for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++) {
2144                if (mHwModules[i]->mInputProfiles[j]->mSupportedDevices.types() &
2145                        device & ~AUDIO_DEVICE_BIT_IN) {
2146                    return mHwModules[i];
2147                }
2148            }
2149        }
2150    }
2151    return module;
2152}
2153
2154sp <AudioPolicyManager::HwModule> AudioPolicyManager::getModuleFromName(const char *name) const
2155{
2156    sp <HwModule> module;
2157
2158    for (size_t i = 0; i < mHwModules.size(); i++)
2159    {
2160        if (strcmp(mHwModules[i]->mName, name) == 0) {
2161            return mHwModules[i];
2162        }
2163    }
2164    return module;
2165}
2166
2167audio_devices_t AudioPolicyManager::availablePrimaryOutputDevices()
2168{
2169    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
2170    audio_devices_t devices = outputDesc->mProfile->mSupportedDevices.types();
2171    return devices & mAvailableOutputDevices.types();
2172}
2173
2174audio_devices_t AudioPolicyManager::availablePrimaryInputDevices()
2175{
2176    audio_module_handle_t primaryHandle =
2177                                mOutputs.valueFor(mPrimaryOutput)->mProfile->mModule->mHandle;
2178    audio_devices_t devices = AUDIO_DEVICE_NONE;
2179    for (size_t i = 0; i < mAvailableInputDevices.size(); i++) {
2180        if (mAvailableInputDevices[i]->mModule->mHandle == primaryHandle) {
2181            devices |= mAvailableInputDevices[i]->mDeviceType;
2182        }
2183    }
2184    return devices;
2185}
2186
2187status_t AudioPolicyManager::createAudioPatch(const struct audio_patch *patch,
2188                                               audio_patch_handle_t *handle,
2189                                               uid_t uid)
2190{
2191    ALOGV("createAudioPatch()");
2192
2193    if (handle == NULL || patch == NULL) {
2194        return BAD_VALUE;
2195    }
2196    ALOGV("createAudioPatch() num sources %d num sinks %d", patch->num_sources, patch->num_sinks);
2197
2198    if (patch->num_sources == 0 || patch->num_sources > AUDIO_PATCH_PORTS_MAX ||
2199            patch->num_sinks == 0 || patch->num_sinks > AUDIO_PATCH_PORTS_MAX) {
2200        return BAD_VALUE;
2201    }
2202    // only one source per audio patch supported for now
2203    if (patch->num_sources > 1) {
2204        return INVALID_OPERATION;
2205    }
2206
2207    if (patch->sources[0].role != AUDIO_PORT_ROLE_SOURCE) {
2208        return INVALID_OPERATION;
2209    }
2210    for (size_t i = 0; i < patch->num_sinks; i++) {
2211        if (patch->sinks[i].role != AUDIO_PORT_ROLE_SINK) {
2212            return INVALID_OPERATION;
2213        }
2214    }
2215
2216    sp<AudioPatch> patchDesc;
2217    ssize_t index = mAudioPatches.indexOfKey(*handle);
2218
2219    ALOGV("createAudioPatch source id %d role %d type %d", patch->sources[0].id,
2220                                                           patch->sources[0].role,
2221                                                           patch->sources[0].type);
2222#if LOG_NDEBUG == 0
2223    for (size_t i = 0; i < patch->num_sinks; i++) {
2224        ALOGV("createAudioPatch sink %d: id %d role %d type %d", i, patch->sinks[i].id,
2225                                                             patch->sinks[i].role,
2226                                                             patch->sinks[i].type);
2227    }
2228#endif
2229
2230    if (index >= 0) {
2231        patchDesc = mAudioPatches.valueAt(index);
2232        ALOGV("createAudioPatch() mUidCached %d patchDesc->mUid %d uid %d",
2233                                                                  mUidCached, patchDesc->mUid, uid);
2234        if (patchDesc->mUid != mUidCached && uid != patchDesc->mUid) {
2235            return INVALID_OPERATION;
2236        }
2237    } else {
2238        *handle = 0;
2239    }
2240
2241    if (patch->sources[0].type == AUDIO_PORT_TYPE_MIX) {
2242        sp<AudioOutputDescriptor> outputDesc = getOutputFromId(patch->sources[0].id);
2243        if (outputDesc == NULL) {
2244            ALOGV("createAudioPatch() output not found for id %d", patch->sources[0].id);
2245            return BAD_VALUE;
2246        }
2247        ALOG_ASSERT(!outputDesc->isDuplicated(),"duplicated output %d in source in ports",
2248                                                outputDesc->mIoHandle);
2249        if (patchDesc != 0) {
2250            if (patchDesc->mPatch.sources[0].id != patch->sources[0].id) {
2251                ALOGV("createAudioPatch() source id differs for patch current id %d new id %d",
2252                                          patchDesc->mPatch.sources[0].id, patch->sources[0].id);
2253                return BAD_VALUE;
2254            }
2255        }
2256        DeviceVector devices;
2257        for (size_t i = 0; i < patch->num_sinks; i++) {
2258            // Only support mix to devices connection
2259            // TODO add support for mix to mix connection
2260            if (patch->sinks[i].type != AUDIO_PORT_TYPE_DEVICE) {
2261                ALOGV("createAudioPatch() source mix but sink is not a device");
2262                return INVALID_OPERATION;
2263            }
2264            sp<DeviceDescriptor> devDesc =
2265                    mAvailableOutputDevices.getDeviceFromId(patch->sinks[i].id);
2266            if (devDesc == 0) {
2267                ALOGV("createAudioPatch() out device not found for id %d", patch->sinks[i].id);
2268                return BAD_VALUE;
2269            }
2270
2271            if (!outputDesc->mProfile->isCompatibleProfile(devDesc->mDeviceType,
2272                                                           patch->sources[0].sample_rate,
2273                                                         NULL,  // updatedSamplingRate
2274                                                         patch->sources[0].format,
2275                                                         patch->sources[0].channel_mask,
2276                                                         AUDIO_OUTPUT_FLAG_NONE /*FIXME*/)) {
2277                ALOGV("createAudioPatch() profile not supported for device %08x",
2278                      devDesc->mDeviceType);
2279                return INVALID_OPERATION;
2280            }
2281            devices.add(devDesc);
2282        }
2283        if (devices.size() == 0) {
2284            return INVALID_OPERATION;
2285        }
2286
2287        // TODO: reconfigure output format and channels here
2288        ALOGV("createAudioPatch() setting device %08x on output %d",
2289              devices.types(), outputDesc->mIoHandle);
2290        setOutputDevice(outputDesc->mIoHandle, devices.types(), true, 0, handle);
2291        index = mAudioPatches.indexOfKey(*handle);
2292        if (index >= 0) {
2293            if (patchDesc != 0 && patchDesc != mAudioPatches.valueAt(index)) {
2294                ALOGW("createAudioPatch() setOutputDevice() did not reuse the patch provided");
2295            }
2296            patchDesc = mAudioPatches.valueAt(index);
2297            patchDesc->mUid = uid;
2298            ALOGV("createAudioPatch() success");
2299        } else {
2300            ALOGW("createAudioPatch() setOutputDevice() failed to create a patch");
2301            return INVALID_OPERATION;
2302        }
2303    } else if (patch->sources[0].type == AUDIO_PORT_TYPE_DEVICE) {
2304        if (patch->sinks[0].type == AUDIO_PORT_TYPE_MIX) {
2305            // input device to input mix connection
2306            // only one sink supported when connecting an input device to a mix
2307            if (patch->num_sinks > 1) {
2308                return INVALID_OPERATION;
2309            }
2310            sp<AudioInputDescriptor> inputDesc = getInputFromId(patch->sinks[0].id);
2311            if (inputDesc == NULL) {
2312                return BAD_VALUE;
2313            }
2314            if (patchDesc != 0) {
2315                if (patchDesc->mPatch.sinks[0].id != patch->sinks[0].id) {
2316                    return BAD_VALUE;
2317                }
2318            }
2319            sp<DeviceDescriptor> devDesc =
2320                    mAvailableInputDevices.getDeviceFromId(patch->sources[0].id);
2321            if (devDesc == 0) {
2322                return BAD_VALUE;
2323            }
2324
2325            if (!inputDesc->mProfile->isCompatibleProfile(devDesc->mDeviceType,
2326                                                         patch->sinks[0].sample_rate,
2327                                                         NULL, /*updatedSampleRate*/
2328                                                         patch->sinks[0].format,
2329                                                         patch->sinks[0].channel_mask,
2330                                                         // FIXME for the parameter type,
2331                                                         // and the NONE
2332                                                         (audio_output_flags_t)
2333                                                            AUDIO_INPUT_FLAG_NONE)) {
2334                return INVALID_OPERATION;
2335            }
2336            // TODO: reconfigure output format and channels here
2337            ALOGV("createAudioPatch() setting device %08x on output %d",
2338                                                  devDesc->mDeviceType, inputDesc->mIoHandle);
2339            setInputDevice(inputDesc->mIoHandle, devDesc->mDeviceType, true, handle);
2340            index = mAudioPatches.indexOfKey(*handle);
2341            if (index >= 0) {
2342                if (patchDesc != 0 && patchDesc != mAudioPatches.valueAt(index)) {
2343                    ALOGW("createAudioPatch() setInputDevice() did not reuse the patch provided");
2344                }
2345                patchDesc = mAudioPatches.valueAt(index);
2346                patchDesc->mUid = uid;
2347                ALOGV("createAudioPatch() success");
2348            } else {
2349                ALOGW("createAudioPatch() setInputDevice() failed to create a patch");
2350                return INVALID_OPERATION;
2351            }
2352        } else if (patch->sinks[0].type == AUDIO_PORT_TYPE_DEVICE) {
2353            // device to device connection
2354            if (patchDesc != 0) {
2355                if (patchDesc->mPatch.sources[0].id != patch->sources[0].id) {
2356                    return BAD_VALUE;
2357                }
2358            }
2359            sp<DeviceDescriptor> srcDeviceDesc =
2360                    mAvailableInputDevices.getDeviceFromId(patch->sources[0].id);
2361            if (srcDeviceDesc == 0) {
2362                return BAD_VALUE;
2363            }
2364
2365            //update source and sink with our own data as the data passed in the patch may
2366            // be incomplete.
2367            struct audio_patch newPatch = *patch;
2368            srcDeviceDesc->toAudioPortConfig(&newPatch.sources[0], &patch->sources[0]);
2369
2370            for (size_t i = 0; i < patch->num_sinks; i++) {
2371                if (patch->sinks[i].type != AUDIO_PORT_TYPE_DEVICE) {
2372                    ALOGV("createAudioPatch() source device but one sink is not a device");
2373                    return INVALID_OPERATION;
2374                }
2375
2376                sp<DeviceDescriptor> sinkDeviceDesc =
2377                        mAvailableOutputDevices.getDeviceFromId(patch->sinks[i].id);
2378                if (sinkDeviceDesc == 0) {
2379                    return BAD_VALUE;
2380                }
2381                sinkDeviceDesc->toAudioPortConfig(&newPatch.sinks[i], &patch->sinks[i]);
2382
2383                if (srcDeviceDesc->mModule != sinkDeviceDesc->mModule) {
2384                    // only one sink supported when connected devices across HW modules
2385                    if (patch->num_sinks > 1) {
2386                        return INVALID_OPERATION;
2387                    }
2388                    SortedVector<audio_io_handle_t> outputs =
2389                                            getOutputsForDevice(sinkDeviceDesc->mDeviceType,
2390                                                                mOutputs);
2391                    // if the sink device is reachable via an opened output stream, request to go via
2392                    // this output stream by adding a second source to the patch description
2393                    audio_io_handle_t output = selectOutput(outputs,
2394                                                            AUDIO_OUTPUT_FLAG_NONE,
2395                                                            AUDIO_FORMAT_INVALID);
2396                    if (output != AUDIO_IO_HANDLE_NONE) {
2397                        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
2398                        if (outputDesc->isDuplicated()) {
2399                            return INVALID_OPERATION;
2400                        }
2401                        outputDesc->toAudioPortConfig(&newPatch.sources[1], &patch->sources[0]);
2402                        newPatch.num_sources = 2;
2403                    }
2404                }
2405            }
2406            // TODO: check from routing capabilities in config file and other conflicting patches
2407
2408            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
2409            if (index >= 0) {
2410                afPatchHandle = patchDesc->mAfPatchHandle;
2411            }
2412
2413            status_t status = mpClientInterface->createAudioPatch(&newPatch,
2414                                                                  &afPatchHandle,
2415                                                                  0);
2416            ALOGV("createAudioPatch() patch panel returned %d patchHandle %d",
2417                                                                  status, afPatchHandle);
2418            if (status == NO_ERROR) {
2419                if (index < 0) {
2420                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
2421                                               &newPatch, uid);
2422                    addAudioPatch(patchDesc->mHandle, patchDesc);
2423                } else {
2424                    patchDesc->mPatch = newPatch;
2425                }
2426                patchDesc->mAfPatchHandle = afPatchHandle;
2427                *handle = patchDesc->mHandle;
2428                nextAudioPortGeneration();
2429                mpClientInterface->onAudioPatchListUpdate();
2430            } else {
2431                ALOGW("createAudioPatch() patch panel could not connect device patch, error %d",
2432                status);
2433                return INVALID_OPERATION;
2434            }
2435        } else {
2436            return BAD_VALUE;
2437        }
2438    } else {
2439        return BAD_VALUE;
2440    }
2441    return NO_ERROR;
2442}
2443
2444status_t AudioPolicyManager::releaseAudioPatch(audio_patch_handle_t handle,
2445                                                  uid_t uid)
2446{
2447    ALOGV("releaseAudioPatch() patch %d", handle);
2448
2449    ssize_t index = mAudioPatches.indexOfKey(handle);
2450
2451    if (index < 0) {
2452        return BAD_VALUE;
2453    }
2454    sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
2455    ALOGV("releaseAudioPatch() mUidCached %d patchDesc->mUid %d uid %d",
2456          mUidCached, patchDesc->mUid, uid);
2457    if (patchDesc->mUid != mUidCached && uid != patchDesc->mUid) {
2458        return INVALID_OPERATION;
2459    }
2460
2461    struct audio_patch *patch = &patchDesc->mPatch;
2462    patchDesc->mUid = mUidCached;
2463    if (patch->sources[0].type == AUDIO_PORT_TYPE_MIX) {
2464        sp<AudioOutputDescriptor> outputDesc = getOutputFromId(patch->sources[0].id);
2465        if (outputDesc == NULL) {
2466            ALOGV("releaseAudioPatch() output not found for id %d", patch->sources[0].id);
2467            return BAD_VALUE;
2468        }
2469
2470        setOutputDevice(outputDesc->mIoHandle,
2471                        getNewOutputDevice(outputDesc->mIoHandle, true /*fromCache*/),
2472                       true,
2473                       0,
2474                       NULL);
2475    } else if (patch->sources[0].type == AUDIO_PORT_TYPE_DEVICE) {
2476        if (patch->sinks[0].type == AUDIO_PORT_TYPE_MIX) {
2477            sp<AudioInputDescriptor> inputDesc = getInputFromId(patch->sinks[0].id);
2478            if (inputDesc == NULL) {
2479                ALOGV("releaseAudioPatch() input not found for id %d", patch->sinks[0].id);
2480                return BAD_VALUE;
2481            }
2482            setInputDevice(inputDesc->mIoHandle,
2483                           getNewInputDevice(inputDesc->mIoHandle),
2484                           true,
2485                           NULL);
2486        } else if (patch->sinks[0].type == AUDIO_PORT_TYPE_DEVICE) {
2487            audio_patch_handle_t afPatchHandle = patchDesc->mAfPatchHandle;
2488            status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
2489            ALOGV("releaseAudioPatch() patch panel returned %d patchHandle %d",
2490                                                              status, patchDesc->mAfPatchHandle);
2491            removeAudioPatch(patchDesc->mHandle);
2492            nextAudioPortGeneration();
2493            mpClientInterface->onAudioPatchListUpdate();
2494        } else {
2495            return BAD_VALUE;
2496        }
2497    } else {
2498        return BAD_VALUE;
2499    }
2500    return NO_ERROR;
2501}
2502
2503status_t AudioPolicyManager::listAudioPatches(unsigned int *num_patches,
2504                                              struct audio_patch *patches,
2505                                              unsigned int *generation)
2506{
2507    if (num_patches == NULL || (*num_patches != 0 && patches == NULL) ||
2508            generation == NULL) {
2509        return BAD_VALUE;
2510    }
2511    ALOGV("listAudioPatches() num_patches %d patches %p available patches %zu",
2512          *num_patches, patches, mAudioPatches.size());
2513    if (patches == NULL) {
2514        *num_patches = 0;
2515    }
2516
2517    size_t patchesWritten = 0;
2518    size_t patchesMax = *num_patches;
2519    for (size_t i = 0;
2520            i  < mAudioPatches.size() && patchesWritten < patchesMax; i++) {
2521        patches[patchesWritten] = mAudioPatches[i]->mPatch;
2522        patches[patchesWritten++].id = mAudioPatches[i]->mHandle;
2523        ALOGV("listAudioPatches() patch %zu num_sources %d num_sinks %d",
2524              i, mAudioPatches[i]->mPatch.num_sources, mAudioPatches[i]->mPatch.num_sinks);
2525    }
2526    *num_patches = mAudioPatches.size();
2527
2528    *generation = curAudioPortGeneration();
2529    ALOGV("listAudioPatches() got %zu patches needed %d", patchesWritten, *num_patches);
2530    return NO_ERROR;
2531}
2532
2533status_t AudioPolicyManager::setAudioPortConfig(const struct audio_port_config *config)
2534{
2535    ALOGV("setAudioPortConfig()");
2536
2537    if (config == NULL) {
2538        return BAD_VALUE;
2539    }
2540    ALOGV("setAudioPortConfig() on port handle %d", config->id);
2541    // Only support gain configuration for now
2542    if (config->config_mask != AUDIO_PORT_CONFIG_GAIN) {
2543        return INVALID_OPERATION;
2544    }
2545
2546    sp<AudioPortConfig> audioPortConfig;
2547    if (config->type == AUDIO_PORT_TYPE_MIX) {
2548        if (config->role == AUDIO_PORT_ROLE_SOURCE) {
2549            sp<AudioOutputDescriptor> outputDesc = getOutputFromId(config->id);
2550            if (outputDesc == NULL) {
2551                return BAD_VALUE;
2552            }
2553            ALOG_ASSERT(!outputDesc->isDuplicated(),
2554                        "setAudioPortConfig() called on duplicated output %d",
2555                        outputDesc->mIoHandle);
2556            audioPortConfig = outputDesc;
2557        } else if (config->role == AUDIO_PORT_ROLE_SINK) {
2558            sp<AudioInputDescriptor> inputDesc = getInputFromId(config->id);
2559            if (inputDesc == NULL) {
2560                return BAD_VALUE;
2561            }
2562            audioPortConfig = inputDesc;
2563        } else {
2564            return BAD_VALUE;
2565        }
2566    } else if (config->type == AUDIO_PORT_TYPE_DEVICE) {
2567        sp<DeviceDescriptor> deviceDesc;
2568        if (config->role == AUDIO_PORT_ROLE_SOURCE) {
2569            deviceDesc = mAvailableInputDevices.getDeviceFromId(config->id);
2570        } else if (config->role == AUDIO_PORT_ROLE_SINK) {
2571            deviceDesc = mAvailableOutputDevices.getDeviceFromId(config->id);
2572        } else {
2573            return BAD_VALUE;
2574        }
2575        if (deviceDesc == NULL) {
2576            return BAD_VALUE;
2577        }
2578        audioPortConfig = deviceDesc;
2579    } else {
2580        return BAD_VALUE;
2581    }
2582
2583    struct audio_port_config backupConfig;
2584    status_t status = audioPortConfig->applyAudioPortConfig(config, &backupConfig);
2585    if (status == NO_ERROR) {
2586        struct audio_port_config newConfig;
2587        audioPortConfig->toAudioPortConfig(&newConfig, config);
2588        status = mpClientInterface->setAudioPortConfig(&newConfig, 0);
2589    }
2590    if (status != NO_ERROR) {
2591        audioPortConfig->applyAudioPortConfig(&backupConfig);
2592    }
2593
2594    return status;
2595}
2596
2597void AudioPolicyManager::clearAudioPatches(uid_t uid)
2598{
2599    for (ssize_t i = 0; i < (ssize_t)mAudioPatches.size(); i++)  {
2600        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(i);
2601        if (patchDesc->mUid == uid) {
2602            // releaseAudioPatch() removes the patch from mAudioPatches
2603            if (releaseAudioPatch(mAudioPatches.keyAt(i), uid) == NO_ERROR) {
2604                i--;
2605            }
2606        }
2607    }
2608}
2609
2610status_t AudioPolicyManager::acquireSoundTriggerSession(audio_session_t *session,
2611                                       audio_io_handle_t *ioHandle,
2612                                       audio_devices_t *device)
2613{
2614    *session = (audio_session_t)mpClientInterface->newAudioUniqueId();
2615    *ioHandle = (audio_io_handle_t)mpClientInterface->newAudioUniqueId();
2616    *device = getDeviceForInputSource(AUDIO_SOURCE_HOTWORD);
2617
2618    mSoundTriggerSessions.add(*session, *ioHandle);
2619
2620    return NO_ERROR;
2621}
2622
2623status_t AudioPolicyManager::releaseSoundTriggerSession(audio_session_t session)
2624{
2625    ssize_t index = mSoundTriggerSessions.indexOfKey(session);
2626    if (index < 0) {
2627        ALOGW("acquireSoundTriggerSession() session %d not registered", session);
2628        return BAD_VALUE;
2629    }
2630
2631    mSoundTriggerSessions.removeItem(session);
2632    return NO_ERROR;
2633}
2634
2635status_t AudioPolicyManager::addAudioPatch(audio_patch_handle_t handle,
2636                                           const sp<AudioPatch>& patch)
2637{
2638    ssize_t index = mAudioPatches.indexOfKey(handle);
2639
2640    if (index >= 0) {
2641        ALOGW("addAudioPatch() patch %d already in", handle);
2642        return ALREADY_EXISTS;
2643    }
2644    mAudioPatches.add(handle, patch);
2645    ALOGV("addAudioPatch() handle %d af handle %d num_sources %d num_sinks %d source handle %d"
2646            "sink handle %d",
2647          handle, patch->mAfPatchHandle, patch->mPatch.num_sources, patch->mPatch.num_sinks,
2648          patch->mPatch.sources[0].id, patch->mPatch.sinks[0].id);
2649    return NO_ERROR;
2650}
2651
2652status_t AudioPolicyManager::removeAudioPatch(audio_patch_handle_t handle)
2653{
2654    ssize_t index = mAudioPatches.indexOfKey(handle);
2655
2656    if (index < 0) {
2657        ALOGW("removeAudioPatch() patch %d not in", handle);
2658        return ALREADY_EXISTS;
2659    }
2660    ALOGV("removeAudioPatch() handle %d af handle %d", handle,
2661                      mAudioPatches.valueAt(index)->mAfPatchHandle);
2662    mAudioPatches.removeItemsAt(index);
2663    return NO_ERROR;
2664}
2665
2666// ----------------------------------------------------------------------------
2667// AudioPolicyManager
2668// ----------------------------------------------------------------------------
2669
2670uint32_t AudioPolicyManager::nextUniqueId()
2671{
2672    return android_atomic_inc(&mNextUniqueId);
2673}
2674
2675uint32_t AudioPolicyManager::nextAudioPortGeneration()
2676{
2677    return android_atomic_inc(&mAudioPortGeneration);
2678}
2679
2680AudioPolicyManager::AudioPolicyManager(AudioPolicyClientInterface *clientInterface)
2681    :
2682#ifdef AUDIO_POLICY_TEST
2683    Thread(false),
2684#endif //AUDIO_POLICY_TEST
2685    mPrimaryOutput((audio_io_handle_t)0),
2686    mPhoneState(AUDIO_MODE_NORMAL),
2687    mLimitRingtoneVolume(false), mLastVoiceVolume(-1.0f),
2688    mTotalEffectsCpuLoad(0), mTotalEffectsMemory(0),
2689    mA2dpSuspended(false),
2690    mSpeakerDrcEnabled(false), mNextUniqueId(1),
2691    mAudioPortGeneration(1),
2692    mBeaconMuteRefCount(0),
2693    mBeaconPlayingRefCount(0),
2694    mBeaconMuted(false)
2695{
2696    mUidCached = getuid();
2697    mpClientInterface = clientInterface;
2698
2699    for (int i = 0; i < AUDIO_POLICY_FORCE_USE_CNT; i++) {
2700        mForceUse[i] = AUDIO_POLICY_FORCE_NONE;
2701    }
2702
2703    mDefaultOutputDevice = new DeviceDescriptor(String8(""), AUDIO_DEVICE_OUT_SPEAKER);
2704    if (loadAudioPolicyConfig(AUDIO_POLICY_VENDOR_CONFIG_FILE) != NO_ERROR) {
2705        if (loadAudioPolicyConfig(AUDIO_POLICY_CONFIG_FILE) != NO_ERROR) {
2706            ALOGE("could not load audio policy configuration file, setting defaults");
2707            defaultAudioPolicyConfig();
2708        }
2709    }
2710    // mAvailableOutputDevices and mAvailableInputDevices now contain all attached devices
2711
2712    // must be done after reading the policy
2713    initializeVolumeCurves();
2714
2715    // open all output streams needed to access attached devices
2716    audio_devices_t outputDeviceTypes = mAvailableOutputDevices.types();
2717    audio_devices_t inputDeviceTypes = mAvailableInputDevices.types() & ~AUDIO_DEVICE_BIT_IN;
2718    for (size_t i = 0; i < mHwModules.size(); i++) {
2719        mHwModules[i]->mHandle = mpClientInterface->loadHwModule(mHwModules[i]->mName);
2720        if (mHwModules[i]->mHandle == 0) {
2721            ALOGW("could not open HW module %s", mHwModules[i]->mName);
2722            continue;
2723        }
2724        // open all output streams needed to access attached devices
2725        // except for direct output streams that are only opened when they are actually
2726        // required by an app.
2727        // This also validates mAvailableOutputDevices list
2728        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
2729        {
2730            const sp<IOProfile> outProfile = mHwModules[i]->mOutputProfiles[j];
2731
2732            if (outProfile->mSupportedDevices.isEmpty()) {
2733                ALOGW("Output profile contains no device on module %s", mHwModules[i]->mName);
2734                continue;
2735            }
2736
2737            if ((outProfile->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) != 0) {
2738                continue;
2739            }
2740            audio_devices_t profileType = outProfile->mSupportedDevices.types();
2741            if ((profileType & mDefaultOutputDevice->mDeviceType) != AUDIO_DEVICE_NONE) {
2742                profileType = mDefaultOutputDevice->mDeviceType;
2743            } else {
2744                // chose first device present in mSupportedDevices also part of
2745                // outputDeviceTypes
2746                for (size_t k = 0; k  < outProfile->mSupportedDevices.size(); k++) {
2747                    profileType = outProfile->mSupportedDevices[k]->mDeviceType;
2748                    if ((profileType & outputDeviceTypes) != 0) {
2749                        break;
2750                    }
2751                }
2752            }
2753            if ((profileType & outputDeviceTypes) == 0) {
2754                continue;
2755            }
2756            sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(outProfile);
2757
2758            outputDesc->mDevice = profileType;
2759            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
2760            config.sample_rate = outputDesc->mSamplingRate;
2761            config.channel_mask = outputDesc->mChannelMask;
2762            config.format = outputDesc->mFormat;
2763            audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
2764            status_t status = mpClientInterface->openOutput(outProfile->mModule->mHandle,
2765                                                            &output,
2766                                                            &config,
2767                                                            &outputDesc->mDevice,
2768                                                            String8(""),
2769                                                            &outputDesc->mLatency,
2770                                                            outputDesc->mFlags);
2771
2772            if (status != NO_ERROR) {
2773                ALOGW("Cannot open output stream for device %08x on hw module %s",
2774                      outputDesc->mDevice,
2775                      mHwModules[i]->mName);
2776            } else {
2777                outputDesc->mSamplingRate = config.sample_rate;
2778                outputDesc->mChannelMask = config.channel_mask;
2779                outputDesc->mFormat = config.format;
2780
2781                for (size_t k = 0; k  < outProfile->mSupportedDevices.size(); k++) {
2782                    audio_devices_t type = outProfile->mSupportedDevices[k]->mDeviceType;
2783                    ssize_t index =
2784                            mAvailableOutputDevices.indexOf(outProfile->mSupportedDevices[k]);
2785                    // give a valid ID to an attached device once confirmed it is reachable
2786                    if ((index >= 0) && (mAvailableOutputDevices[index]->mId == 0)) {
2787                        mAvailableOutputDevices[index]->mId = nextUniqueId();
2788                        mAvailableOutputDevices[index]->mModule = mHwModules[i];
2789                    }
2790                }
2791                if (mPrimaryOutput == 0 &&
2792                        outProfile->mFlags & AUDIO_OUTPUT_FLAG_PRIMARY) {
2793                    mPrimaryOutput = output;
2794                }
2795                addOutput(output, outputDesc);
2796                setOutputDevice(output,
2797                                outputDesc->mDevice,
2798                                true);
2799            }
2800        }
2801        // open input streams needed to access attached devices to validate
2802        // mAvailableInputDevices list
2803        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
2804        {
2805            const sp<IOProfile> inProfile = mHwModules[i]->mInputProfiles[j];
2806
2807            if (inProfile->mSupportedDevices.isEmpty()) {
2808                ALOGW("Input profile contains no device on module %s", mHwModules[i]->mName);
2809                continue;
2810            }
2811            // chose first device present in mSupportedDevices also part of
2812            // inputDeviceTypes
2813            audio_devices_t profileType = AUDIO_DEVICE_NONE;
2814            for (size_t k = 0; k  < inProfile->mSupportedDevices.size(); k++) {
2815                profileType = inProfile->mSupportedDevices[k]->mDeviceType;
2816                if (profileType & inputDeviceTypes) {
2817                    break;
2818                }
2819            }
2820            if ((profileType & inputDeviceTypes) == 0) {
2821                continue;
2822            }
2823            sp<AudioInputDescriptor> inputDesc = new AudioInputDescriptor(inProfile);
2824
2825            inputDesc->mInputSource = AUDIO_SOURCE_MIC;
2826            inputDesc->mDevice = profileType;
2827
2828            // find the address
2829            DeviceVector inputDevices = mAvailableInputDevices.getDevicesFromType(profileType);
2830            //   the inputs vector must be of size 1, but we don't want to crash here
2831            String8 address = inputDevices.size() > 0 ? inputDevices.itemAt(0)->mAddress
2832                    : String8("");
2833            ALOGV("  for input device 0x%x using address %s", profileType, address.string());
2834            ALOGE_IF(inputDevices.size() == 0, "Input device list is empty!");
2835
2836            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
2837            config.sample_rate = inputDesc->mSamplingRate;
2838            config.channel_mask = inputDesc->mChannelMask;
2839            config.format = inputDesc->mFormat;
2840            audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
2841            status_t status = mpClientInterface->openInput(inProfile->mModule->mHandle,
2842                                                           &input,
2843                                                           &config,
2844                                                           &inputDesc->mDevice,
2845                                                           address,
2846                                                           AUDIO_SOURCE_MIC,
2847                                                           AUDIO_INPUT_FLAG_NONE);
2848
2849            if (status == NO_ERROR) {
2850                for (size_t k = 0; k  < inProfile->mSupportedDevices.size(); k++) {
2851                    audio_devices_t type = inProfile->mSupportedDevices[k]->mDeviceType;
2852                    ssize_t index =
2853                            mAvailableInputDevices.indexOf(inProfile->mSupportedDevices[k]);
2854                    // give a valid ID to an attached device once confirmed it is reachable
2855                    if ((index >= 0) && (mAvailableInputDevices[index]->mId == 0)) {
2856                        mAvailableInputDevices[index]->mId = nextUniqueId();
2857                        mAvailableInputDevices[index]->mModule = mHwModules[i];
2858                    }
2859                }
2860                mpClientInterface->closeInput(input);
2861            } else {
2862                ALOGW("Cannot open input stream for device %08x on hw module %s",
2863                      inputDesc->mDevice,
2864                      mHwModules[i]->mName);
2865            }
2866        }
2867    }
2868    // make sure all attached devices have been allocated a unique ID
2869    for (size_t i = 0; i  < mAvailableOutputDevices.size();) {
2870        if (mAvailableOutputDevices[i]->mId == 0) {
2871            ALOGW("Input device %08x unreachable", mAvailableOutputDevices[i]->mDeviceType);
2872            mAvailableOutputDevices.remove(mAvailableOutputDevices[i]);
2873            continue;
2874        }
2875        i++;
2876    }
2877    for (size_t i = 0; i  < mAvailableInputDevices.size();) {
2878        if (mAvailableInputDevices[i]->mId == 0) {
2879            ALOGW("Input device %08x unreachable", mAvailableInputDevices[i]->mDeviceType);
2880            mAvailableInputDevices.remove(mAvailableInputDevices[i]);
2881            continue;
2882        }
2883        i++;
2884    }
2885    // make sure default device is reachable
2886    if (mAvailableOutputDevices.indexOf(mDefaultOutputDevice) < 0) {
2887        ALOGE("Default device %08x is unreachable", mDefaultOutputDevice->mDeviceType);
2888    }
2889
2890    ALOGE_IF((mPrimaryOutput == 0), "Failed to open primary output");
2891
2892    updateDevicesAndOutputs();
2893
2894#ifdef AUDIO_POLICY_TEST
2895    if (mPrimaryOutput != 0) {
2896        AudioParameter outputCmd = AudioParameter();
2897        outputCmd.addInt(String8("set_id"), 0);
2898        mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
2899
2900        mTestDevice = AUDIO_DEVICE_OUT_SPEAKER;
2901        mTestSamplingRate = 44100;
2902        mTestFormat = AUDIO_FORMAT_PCM_16_BIT;
2903        mTestChannels =  AUDIO_CHANNEL_OUT_STEREO;
2904        mTestLatencyMs = 0;
2905        mCurOutput = 0;
2906        mDirectOutput = false;
2907        for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
2908            mTestOutputs[i] = 0;
2909        }
2910
2911        const size_t SIZE = 256;
2912        char buffer[SIZE];
2913        snprintf(buffer, SIZE, "AudioPolicyManagerTest");
2914        run(buffer, ANDROID_PRIORITY_AUDIO);
2915    }
2916#endif //AUDIO_POLICY_TEST
2917}
2918
2919AudioPolicyManager::~AudioPolicyManager()
2920{
2921#ifdef AUDIO_POLICY_TEST
2922    exit();
2923#endif //AUDIO_POLICY_TEST
2924   for (size_t i = 0; i < mOutputs.size(); i++) {
2925        mpClientInterface->closeOutput(mOutputs.keyAt(i));
2926   }
2927   for (size_t i = 0; i < mInputs.size(); i++) {
2928        mpClientInterface->closeInput(mInputs.keyAt(i));
2929   }
2930   mAvailableOutputDevices.clear();
2931   mAvailableInputDevices.clear();
2932   mOutputs.clear();
2933   mInputs.clear();
2934   mHwModules.clear();
2935}
2936
2937status_t AudioPolicyManager::initCheck()
2938{
2939    return (mPrimaryOutput == 0) ? NO_INIT : NO_ERROR;
2940}
2941
2942#ifdef AUDIO_POLICY_TEST
2943bool AudioPolicyManager::threadLoop()
2944{
2945    ALOGV("entering threadLoop()");
2946    while (!exitPending())
2947    {
2948        String8 command;
2949        int valueInt;
2950        String8 value;
2951
2952        Mutex::Autolock _l(mLock);
2953        mWaitWorkCV.waitRelative(mLock, milliseconds(50));
2954
2955        command = mpClientInterface->getParameters(0, String8("test_cmd_policy"));
2956        AudioParameter param = AudioParameter(command);
2957
2958        if (param.getInt(String8("test_cmd_policy"), valueInt) == NO_ERROR &&
2959            valueInt != 0) {
2960            ALOGV("Test command %s received", command.string());
2961            String8 target;
2962            if (param.get(String8("target"), target) != NO_ERROR) {
2963                target = "Manager";
2964            }
2965            if (param.getInt(String8("test_cmd_policy_output"), valueInt) == NO_ERROR) {
2966                param.remove(String8("test_cmd_policy_output"));
2967                mCurOutput = valueInt;
2968            }
2969            if (param.get(String8("test_cmd_policy_direct"), value) == NO_ERROR) {
2970                param.remove(String8("test_cmd_policy_direct"));
2971                if (value == "false") {
2972                    mDirectOutput = false;
2973                } else if (value == "true") {
2974                    mDirectOutput = true;
2975                }
2976            }
2977            if (param.getInt(String8("test_cmd_policy_input"), valueInt) == NO_ERROR) {
2978                param.remove(String8("test_cmd_policy_input"));
2979                mTestInput = valueInt;
2980            }
2981
2982            if (param.get(String8("test_cmd_policy_format"), value) == NO_ERROR) {
2983                param.remove(String8("test_cmd_policy_format"));
2984                int format = AUDIO_FORMAT_INVALID;
2985                if (value == "PCM 16 bits") {
2986                    format = AUDIO_FORMAT_PCM_16_BIT;
2987                } else if (value == "PCM 8 bits") {
2988                    format = AUDIO_FORMAT_PCM_8_BIT;
2989                } else if (value == "Compressed MP3") {
2990                    format = AUDIO_FORMAT_MP3;
2991                }
2992                if (format != AUDIO_FORMAT_INVALID) {
2993                    if (target == "Manager") {
2994                        mTestFormat = format;
2995                    } else if (mTestOutputs[mCurOutput] != 0) {
2996                        AudioParameter outputParam = AudioParameter();
2997                        outputParam.addInt(String8("format"), format);
2998                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
2999                    }
3000                }
3001            }
3002            if (param.get(String8("test_cmd_policy_channels"), value) == NO_ERROR) {
3003                param.remove(String8("test_cmd_policy_channels"));
3004                int channels = 0;
3005
3006                if (value == "Channels Stereo") {
3007                    channels =  AUDIO_CHANNEL_OUT_STEREO;
3008                } else if (value == "Channels Mono") {
3009                    channels =  AUDIO_CHANNEL_OUT_MONO;
3010                }
3011                if (channels != 0) {
3012                    if (target == "Manager") {
3013                        mTestChannels = channels;
3014                    } else if (mTestOutputs[mCurOutput] != 0) {
3015                        AudioParameter outputParam = AudioParameter();
3016                        outputParam.addInt(String8("channels"), channels);
3017                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
3018                    }
3019                }
3020            }
3021            if (param.getInt(String8("test_cmd_policy_sampleRate"), valueInt) == NO_ERROR) {
3022                param.remove(String8("test_cmd_policy_sampleRate"));
3023                if (valueInt >= 0 && valueInt <= 96000) {
3024                    int samplingRate = valueInt;
3025                    if (target == "Manager") {
3026                        mTestSamplingRate = samplingRate;
3027                    } else if (mTestOutputs[mCurOutput] != 0) {
3028                        AudioParameter outputParam = AudioParameter();
3029                        outputParam.addInt(String8("sampling_rate"), samplingRate);
3030                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
3031                    }
3032                }
3033            }
3034
3035            if (param.get(String8("test_cmd_policy_reopen"), value) == NO_ERROR) {
3036                param.remove(String8("test_cmd_policy_reopen"));
3037
3038                sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
3039                mpClientInterface->closeOutput(mPrimaryOutput);
3040
3041                audio_module_handle_t moduleHandle = outputDesc->mModule->mHandle;
3042
3043                mOutputs.removeItem(mPrimaryOutput);
3044
3045                sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(NULL);
3046                outputDesc->mDevice = AUDIO_DEVICE_OUT_SPEAKER;
3047                audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3048                config.sample_rate = outputDesc->mSamplingRate;
3049                config.channel_mask = outputDesc->mChannelMask;
3050                config.format = outputDesc->mFormat;
3051                status_t status = mpClientInterface->openOutput(moduleHandle,
3052                                                                &mPrimaryOutput,
3053                                                                &config,
3054                                                                &outputDesc->mDevice,
3055                                                                String8(""),
3056                                                                &outputDesc->mLatency,
3057                                                                outputDesc->mFlags);
3058                if (status != NO_ERROR) {
3059                    ALOGE("Failed to reopen hardware output stream, "
3060                        "samplingRate: %d, format %d, channels %d",
3061                        outputDesc->mSamplingRate, outputDesc->mFormat, outputDesc->mChannelMask);
3062                } else {
3063                    outputDesc->mSamplingRate = config.sample_rate;
3064                    outputDesc->mChannelMask = config.channel_mask;
3065                    outputDesc->mFormat = config.format;
3066                    AudioParameter outputCmd = AudioParameter();
3067                    outputCmd.addInt(String8("set_id"), 0);
3068                    mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
3069                    addOutput(mPrimaryOutput, outputDesc);
3070                }
3071            }
3072
3073
3074            mpClientInterface->setParameters(0, String8("test_cmd_policy="));
3075        }
3076    }
3077    return false;
3078}
3079
3080void AudioPolicyManager::exit()
3081{
3082    {
3083        AutoMutex _l(mLock);
3084        requestExit();
3085        mWaitWorkCV.signal();
3086    }
3087    requestExitAndWait();
3088}
3089
3090int AudioPolicyManager::testOutputIndex(audio_io_handle_t output)
3091{
3092    for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
3093        if (output == mTestOutputs[i]) return i;
3094    }
3095    return 0;
3096}
3097#endif //AUDIO_POLICY_TEST
3098
3099// ---
3100
3101void AudioPolicyManager::addOutput(audio_io_handle_t output, sp<AudioOutputDescriptor> outputDesc)
3102{
3103    outputDesc->mIoHandle = output;
3104    outputDesc->mId = nextUniqueId();
3105    mOutputs.add(output, outputDesc);
3106    nextAudioPortGeneration();
3107}
3108
3109void AudioPolicyManager::addInput(audio_io_handle_t input, sp<AudioInputDescriptor> inputDesc)
3110{
3111    inputDesc->mIoHandle = input;
3112    inputDesc->mId = nextUniqueId();
3113    mInputs.add(input, inputDesc);
3114    nextAudioPortGeneration();
3115}
3116
3117void AudioPolicyManager::findIoHandlesByAddress(sp<AudioOutputDescriptor> desc /*in*/,
3118        const String8 address /*in*/,
3119        SortedVector<audio_io_handle_t>& outputs /*out*/) {
3120    // look for a match on the given address on the addresses of the outputs:
3121    // find the address by finding the patch that maps to this output
3122    ssize_t patchIdx = mAudioPatches.indexOfKey(desc->mPatchHandle);
3123    //ALOGV("    inspecting output %d (patch %d) for supported device=0x%x",
3124    //        outputIdx, patchIdx,  desc->mProfile->mSupportedDevices.types());
3125    if (patchIdx >= 0) {
3126        const sp<AudioPatch> patchDesc = mAudioPatches.valueAt(patchIdx);
3127        const int numSinks = patchDesc->mPatch.num_sinks;
3128        for (ssize_t j=0; j < numSinks; j++) {
3129            if (patchDesc->mPatch.sinks[j].type == AUDIO_PORT_TYPE_DEVICE) {
3130                const char* patchAddr =
3131                        patchDesc->mPatch.sinks[j].ext.device.address;
3132                if (strncmp(patchAddr,
3133                        address.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN) == 0) {
3134                    ALOGV("findIoHandlesByAddress(): adding opened output %d on same address %s",
3135                            desc->mIoHandle,  patchDesc->mPatch.sinks[j].ext.device.address);
3136                    outputs.add(desc->mIoHandle);
3137                    break;
3138                }
3139            }
3140        }
3141    }
3142}
3143
3144status_t AudioPolicyManager::checkOutputsForDevice(const sp<DeviceDescriptor> devDesc,
3145                                                       audio_policy_dev_state_t state,
3146                                                       SortedVector<audio_io_handle_t>& outputs,
3147                                                       const String8 address)
3148{
3149    audio_devices_t device = devDesc->mDeviceType;
3150    sp<AudioOutputDescriptor> desc;
3151    // erase all current sample rates, formats and channel masks
3152    devDesc->clearCapabilities();
3153
3154    if (state == AUDIO_POLICY_DEVICE_STATE_AVAILABLE) {
3155        // first list already open outputs that can be routed to this device
3156        for (size_t i = 0; i < mOutputs.size(); i++) {
3157            desc = mOutputs.valueAt(i);
3158            if (!desc->isDuplicated() && (desc->mProfile->mSupportedDevices.types() & device)) {
3159                if (!deviceDistinguishesOnAddress(device)) {
3160                    ALOGV("checkOutputsForDevice(): adding opened output %d", mOutputs.keyAt(i));
3161                    outputs.add(mOutputs.keyAt(i));
3162                } else {
3163                    ALOGV("  checking address match due to device 0x%x", device);
3164                    findIoHandlesByAddress(desc, address, outputs);
3165                }
3166            }
3167        }
3168        // then look for output profiles that can be routed to this device
3169        SortedVector< sp<IOProfile> > profiles;
3170        for (size_t i = 0; i < mHwModules.size(); i++)
3171        {
3172            if (mHwModules[i]->mHandle == 0) {
3173                continue;
3174            }
3175            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
3176            {
3177                if (mHwModules[i]->mOutputProfiles[j]->mSupportedDevices.types() & device) {
3178                    ALOGV("checkOutputsForDevice(): adding profile %zu from module %zu", j, i);
3179                    profiles.add(mHwModules[i]->mOutputProfiles[j]);
3180                }
3181            }
3182        }
3183
3184        ALOGV("  found %d profiles, %d outputs", profiles.size(), outputs.size());
3185
3186        if (profiles.isEmpty() && outputs.isEmpty()) {
3187            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
3188            return BAD_VALUE;
3189        }
3190
3191        // open outputs for matching profiles if needed. Direct outputs are also opened to
3192        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
3193        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
3194            sp<IOProfile> profile = profiles[profile_index];
3195
3196            // nothing to do if one output is already opened for this profile
3197            size_t j;
3198            for (j = 0; j < outputs.size(); j++) {
3199                desc = mOutputs.valueFor(outputs.itemAt(j));
3200                if (!desc->isDuplicated() && desc->mProfile == profile) {
3201                    // matching profile: save the sample rates, format and channel masks supported
3202                    // by the profile in our device descriptor
3203                    devDesc->importAudioPort(profile);
3204                    break;
3205                }
3206            }
3207            if (j != outputs.size()) {
3208                continue;
3209            }
3210
3211            ALOGV("opening output for device %08x with params %s profile %p",
3212                                                      device, address.string(), profile.get());
3213            desc = new AudioOutputDescriptor(profile);
3214            desc->mDevice = device;
3215            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3216            config.sample_rate = desc->mSamplingRate;
3217            config.channel_mask = desc->mChannelMask;
3218            config.format = desc->mFormat;
3219            config.offload_info.sample_rate = desc->mSamplingRate;
3220            config.offload_info.channel_mask = desc->mChannelMask;
3221            config.offload_info.format = desc->mFormat;
3222            audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
3223            status_t status = mpClientInterface->openOutput(profile->mModule->mHandle,
3224                                                            &output,
3225                                                            &config,
3226                                                            &desc->mDevice,
3227                                                            address,
3228                                                            &desc->mLatency,
3229                                                            desc->mFlags);
3230            if (status == NO_ERROR) {
3231                desc->mSamplingRate = config.sample_rate;
3232                desc->mChannelMask = config.channel_mask;
3233                desc->mFormat = config.format;
3234
3235                // Here is where the out_set_parameters() for card & device gets called
3236                if (!address.isEmpty()) {
3237                    char *param = audio_device_address_to_parameter(device, address);
3238                    mpClientInterface->setParameters(output, String8(param));
3239                    free(param);
3240                }
3241
3242                // Here is where we step through and resolve any "dynamic" fields
3243                String8 reply;
3244                char *value;
3245                if (profile->mSamplingRates[0] == 0) {
3246                    reply = mpClientInterface->getParameters(output,
3247                                            String8(AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES));
3248                    ALOGV("checkOutputsForDevice() supported sampling rates %s",
3249                              reply.string());
3250                    value = strpbrk((char *)reply.string(), "=");
3251                    if (value != NULL) {
3252                        profile->loadSamplingRates(value + 1);
3253                    }
3254                }
3255                if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3256                    reply = mpClientInterface->getParameters(output,
3257                                                   String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS));
3258                    ALOGV("checkOutputsForDevice() supported formats %s",
3259                              reply.string());
3260                    value = strpbrk((char *)reply.string(), "=");
3261                    if (value != NULL) {
3262                        profile->loadFormats(value + 1);
3263                    }
3264                }
3265                if (profile->mChannelMasks[0] == 0) {
3266                    reply = mpClientInterface->getParameters(output,
3267                                                  String8(AUDIO_PARAMETER_STREAM_SUP_CHANNELS));
3268                    ALOGV("checkOutputsForDevice() supported channel masks %s",
3269                              reply.string());
3270                    value = strpbrk((char *)reply.string(), "=");
3271                    if (value != NULL) {
3272                        profile->loadOutChannels(value + 1);
3273                    }
3274                }
3275                if (((profile->mSamplingRates[0] == 0) &&
3276                         (profile->mSamplingRates.size() < 2)) ||
3277                     ((profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) &&
3278                         (profile->mFormats.size() < 2)) ||
3279                     ((profile->mChannelMasks[0] == 0) &&
3280                         (profile->mChannelMasks.size() < 2))) {
3281                    ALOGW("checkOutputsForDevice() missing param");
3282                    mpClientInterface->closeOutput(output);
3283                    output = AUDIO_IO_HANDLE_NONE;
3284                } else if (profile->mSamplingRates[0] == 0 || profile->mFormats[0] == 0 ||
3285                            profile->mChannelMasks[0] == 0) {
3286                    mpClientInterface->closeOutput(output);
3287                    config.sample_rate = profile->pickSamplingRate();
3288                    config.channel_mask = profile->pickChannelMask();
3289                    config.format = profile->pickFormat();
3290                    config.offload_info.sample_rate = config.sample_rate;
3291                    config.offload_info.channel_mask = config.channel_mask;
3292                    config.offload_info.format = config.format;
3293                    status = mpClientInterface->openOutput(profile->mModule->mHandle,
3294                                                           &output,
3295                                                           &config,
3296                                                           &desc->mDevice,
3297                                                           address,
3298                                                           &desc->mLatency,
3299                                                           desc->mFlags);
3300                    if (status == NO_ERROR) {
3301                        desc->mSamplingRate = config.sample_rate;
3302                        desc->mChannelMask = config.channel_mask;
3303                        desc->mFormat = config.format;
3304                    } else {
3305                        output = AUDIO_IO_HANDLE_NONE;
3306                    }
3307                }
3308
3309                if (output != AUDIO_IO_HANDLE_NONE) {
3310                    addOutput(output, desc);
3311                    if ((desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) == 0) {
3312                        audio_io_handle_t duplicatedOutput = AUDIO_IO_HANDLE_NONE;
3313
3314                        // set initial stream volume for device
3315                        applyStreamVolumes(output, device, 0, true);
3316
3317                        //TODO: configure audio effect output stage here
3318
3319                        // open a duplicating output thread for the new output and the primary output
3320                        duplicatedOutput = mpClientInterface->openDuplicateOutput(output,
3321                                                                                  mPrimaryOutput);
3322                        if (duplicatedOutput != AUDIO_IO_HANDLE_NONE) {
3323                            // add duplicated output descriptor
3324                            sp<AudioOutputDescriptor> dupOutputDesc =
3325                                    new AudioOutputDescriptor(NULL);
3326                            dupOutputDesc->mOutput1 = mOutputs.valueFor(mPrimaryOutput);
3327                            dupOutputDesc->mOutput2 = mOutputs.valueFor(output);
3328                            dupOutputDesc->mSamplingRate = desc->mSamplingRate;
3329                            dupOutputDesc->mFormat = desc->mFormat;
3330                            dupOutputDesc->mChannelMask = desc->mChannelMask;
3331                            dupOutputDesc->mLatency = desc->mLatency;
3332                            addOutput(duplicatedOutput, dupOutputDesc);
3333                            applyStreamVolumes(duplicatedOutput, device, 0, true);
3334                        } else {
3335                            ALOGW("checkOutputsForDevice() could not open dup output for %d and %d",
3336                                    mPrimaryOutput, output);
3337                            mpClientInterface->closeOutput(output);
3338                            mOutputs.removeItem(output);
3339                            nextAudioPortGeneration();
3340                            output = AUDIO_IO_HANDLE_NONE;
3341                        }
3342                    }
3343                }
3344            } else {
3345                output = AUDIO_IO_HANDLE_NONE;
3346            }
3347            if (output == AUDIO_IO_HANDLE_NONE) {
3348                ALOGW("checkOutputsForDevice() could not open output for device %x", device);
3349                profiles.removeAt(profile_index);
3350                profile_index--;
3351            } else {
3352                outputs.add(output);
3353                devDesc->importAudioPort(profile);
3354
3355                if (deviceDistinguishesOnAddress(device)) {
3356                    ALOGV("checkOutputsForDevice(): setOutputDevice(dev=0x%x, addr=%s)",
3357                            device, address.string());
3358                    setOutputDevice(output, device, true/*force*/, 0/*delay*/,
3359                            NULL/*patch handle*/, address.string());
3360                }
3361                ALOGV("checkOutputsForDevice(): adding output %d", output);
3362            }
3363        }
3364
3365        if (profiles.isEmpty()) {
3366            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
3367            return BAD_VALUE;
3368        }
3369    } else { // Disconnect
3370        // check if one opened output is not needed any more after disconnecting one device
3371        for (size_t i = 0; i < mOutputs.size(); i++) {
3372            desc = mOutputs.valueAt(i);
3373            if (!desc->isDuplicated()) {
3374                if  (!(desc->mProfile->mSupportedDevices.types()
3375                        & mAvailableOutputDevices.types())) {
3376                    ALOGV("checkOutputsForDevice(): disconnecting adding output %d",
3377                            mOutputs.keyAt(i));
3378                    outputs.add(mOutputs.keyAt(i));
3379                } else if (deviceDistinguishesOnAddress(device) &&
3380                        // exact match on device
3381                        (desc->mProfile->mSupportedDevices.types() == device)) {
3382                    findIoHandlesByAddress(desc, address, outputs);
3383                }
3384            }
3385        }
3386        // Clear any profiles associated with the disconnected device.
3387        for (size_t i = 0; i < mHwModules.size(); i++)
3388        {
3389            if (mHwModules[i]->mHandle == 0) {
3390                continue;
3391            }
3392            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
3393            {
3394                sp<IOProfile> profile = mHwModules[i]->mOutputProfiles[j];
3395                if (profile->mSupportedDevices.types() & device) {
3396                    ALOGV("checkOutputsForDevice(): "
3397                            "clearing direct output profile %zu on module %zu", j, i);
3398                    if (profile->mSamplingRates[0] == 0) {
3399                        profile->mSamplingRates.clear();
3400                        profile->mSamplingRates.add(0);
3401                    }
3402                    if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3403                        profile->mFormats.clear();
3404                        profile->mFormats.add(AUDIO_FORMAT_DEFAULT);
3405                    }
3406                    if (profile->mChannelMasks[0] == 0) {
3407                        profile->mChannelMasks.clear();
3408                        profile->mChannelMasks.add(0);
3409                    }
3410                }
3411            }
3412        }
3413    }
3414    return NO_ERROR;
3415}
3416
3417status_t AudioPolicyManager::checkInputsForDevice(audio_devices_t device,
3418                                                      audio_policy_dev_state_t state,
3419                                                      SortedVector<audio_io_handle_t>& inputs,
3420                                                      const String8 address)
3421{
3422    sp<AudioInputDescriptor> desc;
3423    if (state == AUDIO_POLICY_DEVICE_STATE_AVAILABLE) {
3424        // first list already open inputs that can be routed to this device
3425        for (size_t input_index = 0; input_index < mInputs.size(); input_index++) {
3426            desc = mInputs.valueAt(input_index);
3427            if (desc->mProfile->mSupportedDevices.types() & (device & ~AUDIO_DEVICE_BIT_IN)) {
3428                ALOGV("checkInputsForDevice(): adding opened input %d", mInputs.keyAt(input_index));
3429               inputs.add(mInputs.keyAt(input_index));
3430            }
3431        }
3432
3433        // then look for input profiles that can be routed to this device
3434        SortedVector< sp<IOProfile> > profiles;
3435        for (size_t module_idx = 0; module_idx < mHwModules.size(); module_idx++)
3436        {
3437            if (mHwModules[module_idx]->mHandle == 0) {
3438                continue;
3439            }
3440            for (size_t profile_index = 0;
3441                 profile_index < mHwModules[module_idx]->mInputProfiles.size();
3442                 profile_index++)
3443            {
3444                if (mHwModules[module_idx]->mInputProfiles[profile_index]->mSupportedDevices.types()
3445                        & (device & ~AUDIO_DEVICE_BIT_IN)) {
3446                    ALOGV("checkInputsForDevice(): adding profile %zu from module %zu",
3447                          profile_index, module_idx);
3448                    profiles.add(mHwModules[module_idx]->mInputProfiles[profile_index]);
3449                }
3450            }
3451        }
3452
3453        if (profiles.isEmpty() && inputs.isEmpty()) {
3454            ALOGW("checkInputsForDevice(): No input available for device 0x%X", device);
3455            return BAD_VALUE;
3456        }
3457
3458        // open inputs for matching profiles if needed. Direct inputs are also opened to
3459        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
3460        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
3461
3462            sp<IOProfile> profile = profiles[profile_index];
3463            // nothing to do if one input is already opened for this profile
3464            size_t input_index;
3465            for (input_index = 0; input_index < mInputs.size(); input_index++) {
3466                desc = mInputs.valueAt(input_index);
3467                if (desc->mProfile == profile) {
3468                    break;
3469                }
3470            }
3471            if (input_index != mInputs.size()) {
3472                continue;
3473            }
3474
3475            ALOGV("opening input for device 0x%X with params %s", device, address.string());
3476            desc = new AudioInputDescriptor(profile);
3477            desc->mDevice = device;
3478            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3479            config.sample_rate = desc->mSamplingRate;
3480            config.channel_mask = desc->mChannelMask;
3481            config.format = desc->mFormat;
3482            audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
3483            status_t status = mpClientInterface->openInput(profile->mModule->mHandle,
3484                                                           &input,
3485                                                           &config,
3486                                                           &desc->mDevice,
3487                                                           address,
3488                                                           AUDIO_SOURCE_MIC,
3489                                                           AUDIO_INPUT_FLAG_NONE /*FIXME*/);
3490
3491            if (status == NO_ERROR) {
3492                desc->mSamplingRate = config.sample_rate;
3493                desc->mChannelMask = config.channel_mask;
3494                desc->mFormat = config.format;
3495
3496                if (!address.isEmpty()) {
3497                    char *param = audio_device_address_to_parameter(device, address);
3498                    mpClientInterface->setParameters(input, String8(param));
3499                    free(param);
3500                }
3501
3502                // Here is where we step through and resolve any "dynamic" fields
3503                String8 reply;
3504                char *value;
3505                if (profile->mSamplingRates[0] == 0) {
3506                    reply = mpClientInterface->getParameters(input,
3507                                            String8(AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES));
3508                    ALOGV("checkInputsForDevice() direct input sup sampling rates %s",
3509                              reply.string());
3510                    value = strpbrk((char *)reply.string(), "=");
3511                    if (value != NULL) {
3512                        profile->loadSamplingRates(value + 1);
3513                    }
3514                }
3515                if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3516                    reply = mpClientInterface->getParameters(input,
3517                                                   String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS));
3518                    ALOGV("checkInputsForDevice() direct input sup formats %s", reply.string());
3519                    value = strpbrk((char *)reply.string(), "=");
3520                    if (value != NULL) {
3521                        profile->loadFormats(value + 1);
3522                    }
3523                }
3524                if (profile->mChannelMasks[0] == 0) {
3525                    reply = mpClientInterface->getParameters(input,
3526                                                  String8(AUDIO_PARAMETER_STREAM_SUP_CHANNELS));
3527                    ALOGV("checkInputsForDevice() direct input sup channel masks %s",
3528                              reply.string());
3529                    value = strpbrk((char *)reply.string(), "=");
3530                    if (value != NULL) {
3531                        profile->loadInChannels(value + 1);
3532                    }
3533                }
3534                if (((profile->mSamplingRates[0] == 0) && (profile->mSamplingRates.size() < 2)) ||
3535                     ((profile->mFormats[0] == 0) && (profile->mFormats.size() < 2)) ||
3536                     ((profile->mChannelMasks[0] == 0) && (profile->mChannelMasks.size() < 2))) {
3537                    ALOGW("checkInputsForDevice() direct input missing param");
3538                    mpClientInterface->closeInput(input);
3539                    input = AUDIO_IO_HANDLE_NONE;
3540                }
3541
3542                if (input != 0) {
3543                    addInput(input, desc);
3544                }
3545            } // endif input != 0
3546
3547            if (input == AUDIO_IO_HANDLE_NONE) {
3548                ALOGW("checkInputsForDevice() could not open input for device 0x%X", device);
3549                profiles.removeAt(profile_index);
3550                profile_index--;
3551            } else {
3552                inputs.add(input);
3553                ALOGV("checkInputsForDevice(): adding input %d", input);
3554            }
3555        } // end scan profiles
3556
3557        if (profiles.isEmpty()) {
3558            ALOGW("checkInputsForDevice(): No input available for device 0x%X", device);
3559            return BAD_VALUE;
3560        }
3561    } else {
3562        // Disconnect
3563        // check if one opened input is not needed any more after disconnecting one device
3564        for (size_t input_index = 0; input_index < mInputs.size(); input_index++) {
3565            desc = mInputs.valueAt(input_index);
3566            if (!(desc->mProfile->mSupportedDevices.types() & mAvailableInputDevices.types() &
3567                    ~AUDIO_DEVICE_BIT_IN)) {
3568                ALOGV("checkInputsForDevice(): disconnecting adding input %d",
3569                      mInputs.keyAt(input_index));
3570                inputs.add(mInputs.keyAt(input_index));
3571            }
3572        }
3573        // Clear any profiles associated with the disconnected device.
3574        for (size_t module_index = 0; module_index < mHwModules.size(); module_index++) {
3575            if (mHwModules[module_index]->mHandle == 0) {
3576                continue;
3577            }
3578            for (size_t profile_index = 0;
3579                 profile_index < mHwModules[module_index]->mInputProfiles.size();
3580                 profile_index++) {
3581                sp<IOProfile> profile = mHwModules[module_index]->mInputProfiles[profile_index];
3582                if (profile->mSupportedDevices.types() & device & ~AUDIO_DEVICE_BIT_IN) {
3583                    ALOGV("checkInputsForDevice(): clearing direct input profile %zu on module %zu",
3584                          profile_index, module_index);
3585                    if (profile->mSamplingRates[0] == 0) {
3586                        profile->mSamplingRates.clear();
3587                        profile->mSamplingRates.add(0);
3588                    }
3589                    if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3590                        profile->mFormats.clear();
3591                        profile->mFormats.add(AUDIO_FORMAT_DEFAULT);
3592                    }
3593                    if (profile->mChannelMasks[0] == 0) {
3594                        profile->mChannelMasks.clear();
3595                        profile->mChannelMasks.add(0);
3596                    }
3597                }
3598            }
3599        }
3600    } // end disconnect
3601
3602    return NO_ERROR;
3603}
3604
3605
3606void AudioPolicyManager::closeOutput(audio_io_handle_t output)
3607{
3608    ALOGV("closeOutput(%d)", output);
3609
3610    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
3611    if (outputDesc == NULL) {
3612        ALOGW("closeOutput() unknown output %d", output);
3613        return;
3614    }
3615
3616    // look for duplicated outputs connected to the output being removed.
3617    for (size_t i = 0; i < mOutputs.size(); i++) {
3618        sp<AudioOutputDescriptor> dupOutputDesc = mOutputs.valueAt(i);
3619        if (dupOutputDesc->isDuplicated() &&
3620                (dupOutputDesc->mOutput1 == outputDesc ||
3621                dupOutputDesc->mOutput2 == outputDesc)) {
3622            sp<AudioOutputDescriptor> outputDesc2;
3623            if (dupOutputDesc->mOutput1 == outputDesc) {
3624                outputDesc2 = dupOutputDesc->mOutput2;
3625            } else {
3626                outputDesc2 = dupOutputDesc->mOutput1;
3627            }
3628            // As all active tracks on duplicated output will be deleted,
3629            // and as they were also referenced on the other output, the reference
3630            // count for their stream type must be adjusted accordingly on
3631            // the other output.
3632            for (int j = 0; j < AUDIO_STREAM_CNT; j++) {
3633                int refCount = dupOutputDesc->mRefCount[j];
3634                outputDesc2->changeRefCount((audio_stream_type_t)j,-refCount);
3635            }
3636            audio_io_handle_t duplicatedOutput = mOutputs.keyAt(i);
3637            ALOGV("closeOutput() closing also duplicated output %d", duplicatedOutput);
3638
3639            mpClientInterface->closeOutput(duplicatedOutput);
3640            mOutputs.removeItem(duplicatedOutput);
3641        }
3642    }
3643
3644    nextAudioPortGeneration();
3645
3646    ssize_t index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
3647    if (index >= 0) {
3648        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3649        status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
3650        mAudioPatches.removeItemsAt(index);
3651        mpClientInterface->onAudioPatchListUpdate();
3652    }
3653
3654    AudioParameter param;
3655    param.add(String8("closing"), String8("true"));
3656    mpClientInterface->setParameters(output, param.toString());
3657
3658    mpClientInterface->closeOutput(output);
3659    mOutputs.removeItem(output);
3660    mPreviousOutputs = mOutputs;
3661}
3662
3663void AudioPolicyManager::closeInput(audio_io_handle_t input)
3664{
3665    ALOGV("closeInput(%d)", input);
3666
3667    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
3668    if (inputDesc == NULL) {
3669        ALOGW("closeInput() unknown input %d", input);
3670        return;
3671    }
3672
3673    nextAudioPortGeneration();
3674
3675    ssize_t index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
3676    if (index >= 0) {
3677        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3678        status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
3679        mAudioPatches.removeItemsAt(index);
3680        mpClientInterface->onAudioPatchListUpdate();
3681    }
3682
3683    mpClientInterface->closeInput(input);
3684    mInputs.removeItem(input);
3685}
3686
3687SortedVector<audio_io_handle_t> AudioPolicyManager::getOutputsForDevice(audio_devices_t device,
3688                        DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > openOutputs)
3689{
3690    SortedVector<audio_io_handle_t> outputs;
3691
3692    ALOGVV("getOutputsForDevice() device %04x", device);
3693    for (size_t i = 0; i < openOutputs.size(); i++) {
3694        ALOGVV("output %d isDuplicated=%d device=%04x",
3695                i, openOutputs.valueAt(i)->isDuplicated(), openOutputs.valueAt(i)->supportedDevices());
3696        if ((device & openOutputs.valueAt(i)->supportedDevices()) == device) {
3697            ALOGVV("getOutputsForDevice() found output %d", openOutputs.keyAt(i));
3698            outputs.add(openOutputs.keyAt(i));
3699        }
3700    }
3701    return outputs;
3702}
3703
3704bool AudioPolicyManager::vectorsEqual(SortedVector<audio_io_handle_t>& outputs1,
3705                                   SortedVector<audio_io_handle_t>& outputs2)
3706{
3707    if (outputs1.size() != outputs2.size()) {
3708        return false;
3709    }
3710    for (size_t i = 0; i < outputs1.size(); i++) {
3711        if (outputs1[i] != outputs2[i]) {
3712            return false;
3713        }
3714    }
3715    return true;
3716}
3717
3718void AudioPolicyManager::checkOutputForStrategy(routing_strategy strategy)
3719{
3720    audio_devices_t oldDevice = getDeviceForStrategy(strategy, true /*fromCache*/);
3721    audio_devices_t newDevice = getDeviceForStrategy(strategy, false /*fromCache*/);
3722    SortedVector<audio_io_handle_t> srcOutputs = getOutputsForDevice(oldDevice, mPreviousOutputs);
3723    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(newDevice, mOutputs);
3724
3725    if (!vectorsEqual(srcOutputs,dstOutputs)) {
3726        ALOGV("checkOutputForStrategy() strategy %d, moving from output %d to output %d",
3727              strategy, srcOutputs[0], dstOutputs[0]);
3728        // mute strategy while moving tracks from one output to another
3729        for (size_t i = 0; i < srcOutputs.size(); i++) {
3730            sp<AudioOutputDescriptor> desc = mOutputs.valueFor(srcOutputs[i]);
3731            if (desc->isStrategyActive(strategy)) {
3732                setStrategyMute(strategy, true, srcOutputs[i]);
3733                setStrategyMute(strategy, false, srcOutputs[i], MUTE_TIME_MS, newDevice);
3734            }
3735        }
3736
3737        // Move effects associated to this strategy from previous output to new output
3738        if (strategy == STRATEGY_MEDIA) {
3739            audio_io_handle_t fxOutput = selectOutputForEffects(dstOutputs);
3740            SortedVector<audio_io_handle_t> moved;
3741            for (size_t i = 0; i < mEffects.size(); i++) {
3742                sp<EffectDescriptor> effectDesc = mEffects.valueAt(i);
3743                if (effectDesc->mSession == AUDIO_SESSION_OUTPUT_MIX &&
3744                        effectDesc->mIo != fxOutput) {
3745                    if (moved.indexOf(effectDesc->mIo) < 0) {
3746                        ALOGV("checkOutputForStrategy() moving effect %d to output %d",
3747                              mEffects.keyAt(i), fxOutput);
3748                        mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, effectDesc->mIo,
3749                                                       fxOutput);
3750                        moved.add(effectDesc->mIo);
3751                    }
3752                    effectDesc->mIo = fxOutput;
3753                }
3754            }
3755        }
3756        // Move tracks associated to this strategy from previous output to new output
3757        for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
3758            if (getStrategy((audio_stream_type_t)i) == strategy) {
3759                mpClientInterface->invalidateStream((audio_stream_type_t)i);
3760            }
3761        }
3762    }
3763}
3764
3765void AudioPolicyManager::checkOutputForAllStrategies()
3766{
3767    if (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_SYSTEM_ENFORCED)
3768        checkOutputForStrategy(STRATEGY_ENFORCED_AUDIBLE);
3769    checkOutputForStrategy(STRATEGY_PHONE);
3770    if (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] != AUDIO_POLICY_FORCE_SYSTEM_ENFORCED)
3771        checkOutputForStrategy(STRATEGY_ENFORCED_AUDIBLE);
3772    checkOutputForStrategy(STRATEGY_SONIFICATION);
3773    checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
3774    checkOutputForStrategy(STRATEGY_MEDIA);
3775    checkOutputForStrategy(STRATEGY_DTMF);
3776}
3777
3778audio_io_handle_t AudioPolicyManager::getA2dpOutput()
3779{
3780    for (size_t i = 0; i < mOutputs.size(); i++) {
3781        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
3782        if (!outputDesc->isDuplicated() && outputDesc->device() & AUDIO_DEVICE_OUT_ALL_A2DP) {
3783            return mOutputs.keyAt(i);
3784        }
3785    }
3786
3787    return 0;
3788}
3789
3790void AudioPolicyManager::checkA2dpSuspend()
3791{
3792    audio_io_handle_t a2dpOutput = getA2dpOutput();
3793    if (a2dpOutput == 0) {
3794        mA2dpSuspended = false;
3795        return;
3796    }
3797
3798    bool isScoConnected =
3799            ((mAvailableInputDevices.types() & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET &
3800                    ~AUDIO_DEVICE_BIT_IN) != 0) ||
3801            ((mAvailableOutputDevices.types() & AUDIO_DEVICE_OUT_ALL_SCO) != 0);
3802    // suspend A2DP output if:
3803    //      (NOT already suspended) &&
3804    //      ((SCO device is connected &&
3805    //       (forced usage for communication || for record is SCO))) ||
3806    //      (phone state is ringing || in call)
3807    //
3808    // restore A2DP output if:
3809    //      (Already suspended) &&
3810    //      ((SCO device is NOT connected ||
3811    //       (forced usage NOT for communication && NOT for record is SCO))) &&
3812    //      (phone state is NOT ringing && NOT in call)
3813    //
3814    if (mA2dpSuspended) {
3815        if ((!isScoConnected ||
3816             ((mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] != AUDIO_POLICY_FORCE_BT_SCO) &&
3817              (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] != AUDIO_POLICY_FORCE_BT_SCO))) &&
3818             ((mPhoneState != AUDIO_MODE_IN_CALL) &&
3819              (mPhoneState != AUDIO_MODE_RINGTONE))) {
3820
3821            mpClientInterface->restoreOutput(a2dpOutput);
3822            mA2dpSuspended = false;
3823        }
3824    } else {
3825        if ((isScoConnected &&
3826             ((mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] == AUDIO_POLICY_FORCE_BT_SCO) ||
3827              (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] == AUDIO_POLICY_FORCE_BT_SCO))) ||
3828             ((mPhoneState == AUDIO_MODE_IN_CALL) ||
3829              (mPhoneState == AUDIO_MODE_RINGTONE))) {
3830
3831            mpClientInterface->suspendOutput(a2dpOutput);
3832            mA2dpSuspended = true;
3833        }
3834    }
3835}
3836
3837audio_devices_t AudioPolicyManager::getNewOutputDevice(audio_io_handle_t output, bool fromCache)
3838{
3839    audio_devices_t device = AUDIO_DEVICE_NONE;
3840
3841    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
3842
3843    ssize_t index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
3844    if (index >= 0) {
3845        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3846        if (patchDesc->mUid != mUidCached) {
3847            ALOGV("getNewOutputDevice() device %08x forced by patch %d",
3848                  outputDesc->device(), outputDesc->mPatchHandle);
3849            return outputDesc->device();
3850        }
3851    }
3852
3853    // check the following by order of priority to request a routing change if necessary:
3854    // 1: the strategy enforced audible is active and enforced on the output:
3855    //      use device for strategy enforced audible
3856    // 2: we are in call or the strategy phone is active on the output:
3857    //      use device for strategy phone
3858    // 3: the strategy for enforced audible is active but not enforced on the output:
3859    //      use the device for strategy enforced audible
3860    // 4: the strategy sonification is active on the output:
3861    //      use device for strategy sonification
3862    // 5: the strategy "respectful" sonification is active on the output:
3863    //      use device for strategy "respectful" sonification
3864    // 6: the strategy media is active on the output:
3865    //      use device for strategy media
3866    // 7: the strategy DTMF is active on the output:
3867    //      use device for strategy DTMF
3868    // 8: the strategy for beacon, a.k.a. "transmitted through speaker" is active on the output:
3869    //      use device for strategy t-t-s
3870    if (outputDesc->isStrategyActive(STRATEGY_ENFORCED_AUDIBLE) &&
3871        mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_SYSTEM_ENFORCED) {
3872        device = getDeviceForStrategy(STRATEGY_ENFORCED_AUDIBLE, fromCache);
3873    } else if (isInCall() ||
3874                    outputDesc->isStrategyActive(STRATEGY_PHONE)) {
3875        device = getDeviceForStrategy(STRATEGY_PHONE, fromCache);
3876    } else if (outputDesc->isStrategyActive(STRATEGY_ENFORCED_AUDIBLE)) {
3877        device = getDeviceForStrategy(STRATEGY_ENFORCED_AUDIBLE, fromCache);
3878    } else if (outputDesc->isStrategyActive(STRATEGY_SONIFICATION)) {
3879        device = getDeviceForStrategy(STRATEGY_SONIFICATION, fromCache);
3880    } else if (outputDesc->isStrategyActive(STRATEGY_SONIFICATION_RESPECTFUL)) {
3881        device = getDeviceForStrategy(STRATEGY_SONIFICATION_RESPECTFUL, fromCache);
3882    } else if (outputDesc->isStrategyActive(STRATEGY_MEDIA)) {
3883        device = getDeviceForStrategy(STRATEGY_MEDIA, fromCache);
3884    } else if (outputDesc->isStrategyActive(STRATEGY_DTMF)) {
3885        device = getDeviceForStrategy(STRATEGY_DTMF, fromCache);
3886    } else if (outputDesc->isStrategyActive(STRATEGY_TRANSMITTED_THROUGH_SPEAKER)) {
3887        device = getDeviceForStrategy(STRATEGY_TRANSMITTED_THROUGH_SPEAKER, fromCache);
3888    }
3889
3890    ALOGV("getNewOutputDevice() selected device %x", device);
3891    return device;
3892}
3893
3894audio_devices_t AudioPolicyManager::getNewInputDevice(audio_io_handle_t input)
3895{
3896    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
3897
3898    ssize_t index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
3899    if (index >= 0) {
3900        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3901        if (patchDesc->mUid != mUidCached) {
3902            ALOGV("getNewInputDevice() device %08x forced by patch %d",
3903                  inputDesc->mDevice, inputDesc->mPatchHandle);
3904            return inputDesc->mDevice;
3905        }
3906    }
3907
3908    audio_devices_t device = getDeviceForInputSource(inputDesc->mInputSource);
3909
3910    ALOGV("getNewInputDevice() selected device %x", device);
3911    return device;
3912}
3913
3914uint32_t AudioPolicyManager::getStrategyForStream(audio_stream_type_t stream) {
3915    return (uint32_t)getStrategy(stream);
3916}
3917
3918audio_devices_t AudioPolicyManager::getDevicesForStream(audio_stream_type_t stream) {
3919    // By checking the range of stream before calling getStrategy, we avoid
3920    // getStrategy's behavior for invalid streams.  getStrategy would do a ALOGE
3921    // and then return STRATEGY_MEDIA, but we want to return the empty set.
3922    if (stream < (audio_stream_type_t) 0 || stream >= AUDIO_STREAM_CNT) {
3923        return AUDIO_DEVICE_NONE;
3924    }
3925    audio_devices_t devices;
3926    AudioPolicyManager::routing_strategy strategy = getStrategy(stream);
3927    devices = getDeviceForStrategy(strategy, true /*fromCache*/);
3928    SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(devices, mOutputs);
3929    for (size_t i = 0; i < outputs.size(); i++) {
3930        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(outputs[i]);
3931        if (outputDesc->isStrategyActive(strategy)) {
3932            devices = outputDesc->device();
3933            break;
3934        }
3935    }
3936
3937    /*Filter SPEAKER_SAFE out of results, as AudioService doesn't know about it
3938      and doesn't really need to.*/
3939    if (devices & AUDIO_DEVICE_OUT_SPEAKER_SAFE) {
3940        devices |= AUDIO_DEVICE_OUT_SPEAKER;
3941        devices &= ~AUDIO_DEVICE_OUT_SPEAKER_SAFE;
3942    }
3943
3944    return devices;
3945}
3946
3947AudioPolicyManager::routing_strategy AudioPolicyManager::getStrategy(
3948        audio_stream_type_t stream) {
3949    // stream to strategy mapping
3950    switch (stream) {
3951    case AUDIO_STREAM_VOICE_CALL:
3952    case AUDIO_STREAM_BLUETOOTH_SCO:
3953        return STRATEGY_PHONE;
3954    case AUDIO_STREAM_RING:
3955    case AUDIO_STREAM_ALARM:
3956        return STRATEGY_SONIFICATION;
3957    case AUDIO_STREAM_NOTIFICATION:
3958        return STRATEGY_SONIFICATION_RESPECTFUL;
3959    case AUDIO_STREAM_DTMF:
3960        return STRATEGY_DTMF;
3961    default:
3962        ALOGE("unknown stream type");
3963    case AUDIO_STREAM_SYSTEM:
3964        // NOTE: SYSTEM stream uses MEDIA strategy because muting music and switching outputs
3965        // while key clicks are played produces a poor result
3966    case AUDIO_STREAM_MUSIC:
3967        return STRATEGY_MEDIA;
3968    case AUDIO_STREAM_ENFORCED_AUDIBLE:
3969        return STRATEGY_ENFORCED_AUDIBLE;
3970    case AUDIO_STREAM_TTS:
3971        return STRATEGY_TRANSMITTED_THROUGH_SPEAKER;
3972    }
3973}
3974
3975uint32_t AudioPolicyManager::getStrategyForAttr(const audio_attributes_t *attr) {
3976    // flags to strategy mapping
3977    if ((attr->flags & AUDIO_FLAG_BEACON) == AUDIO_FLAG_BEACON) {
3978        return (uint32_t) STRATEGY_TRANSMITTED_THROUGH_SPEAKER;
3979    }
3980    if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
3981        return (uint32_t) STRATEGY_ENFORCED_AUDIBLE;
3982    }
3983
3984    // usage to strategy mapping
3985    switch (attr->usage) {
3986    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
3987        if (isStreamActive(AUDIO_STREAM_RING) || isStreamActive(AUDIO_STREAM_ALARM)) {
3988            return (uint32_t) STRATEGY_SONIFICATION;
3989        }
3990        if (isInCall()) {
3991            return (uint32_t) STRATEGY_PHONE;
3992        }
3993        // FALL THROUGH
3994
3995    case AUDIO_USAGE_MEDIA:
3996    case AUDIO_USAGE_GAME:
3997    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
3998    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
3999        return (uint32_t) STRATEGY_MEDIA;
4000
4001    case AUDIO_USAGE_VOICE_COMMUNICATION:
4002        return (uint32_t) STRATEGY_PHONE;
4003
4004    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
4005        return (uint32_t) STRATEGY_DTMF;
4006
4007    case AUDIO_USAGE_ALARM:
4008    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
4009        return (uint32_t) STRATEGY_SONIFICATION;
4010
4011    case AUDIO_USAGE_NOTIFICATION:
4012    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
4013    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
4014    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
4015    case AUDIO_USAGE_NOTIFICATION_EVENT:
4016        return (uint32_t) STRATEGY_SONIFICATION_RESPECTFUL;
4017
4018    case AUDIO_USAGE_UNKNOWN:
4019    default:
4020        return (uint32_t) STRATEGY_MEDIA;
4021    }
4022}
4023
4024void AudioPolicyManager::handleNotificationRoutingForStream(audio_stream_type_t stream) {
4025    switch(stream) {
4026    case AUDIO_STREAM_MUSIC:
4027        checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
4028        updateDevicesAndOutputs();
4029        break;
4030    default:
4031        break;
4032    }
4033}
4034
4035bool AudioPolicyManager::isAnyOutputActive(audio_stream_type_t streamToIgnore) {
4036    for (size_t s = 0 ; s < AUDIO_STREAM_CNT ; s++) {
4037        if (s == (size_t) streamToIgnore) {
4038            continue;
4039        }
4040        for (size_t i = 0; i < mOutputs.size(); i++) {
4041            const sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
4042            if (outputDesc->mRefCount[s] != 0) {
4043                return true;
4044            }
4045        }
4046    }
4047    return false;
4048}
4049
4050uint32_t AudioPolicyManager::handleEventForBeacon(int event) {
4051    switch(event) {
4052    case STARTING_OUTPUT:
4053        mBeaconMuteRefCount++;
4054        break;
4055    case STOPPING_OUTPUT:
4056        if (mBeaconMuteRefCount > 0) {
4057            mBeaconMuteRefCount--;
4058        }
4059        break;
4060    case STARTING_BEACON:
4061        mBeaconPlayingRefCount++;
4062        break;
4063    case STOPPING_BEACON:
4064        if (mBeaconPlayingRefCount > 0) {
4065            mBeaconPlayingRefCount--;
4066        }
4067        break;
4068    }
4069
4070    if (mBeaconMuteRefCount > 0) {
4071        // any playback causes beacon to be muted
4072        return setBeaconMute(true);
4073    } else {
4074        // no other playback: unmute when beacon starts playing, mute when it stops
4075        return setBeaconMute(mBeaconPlayingRefCount == 0);
4076    }
4077}
4078
4079uint32_t AudioPolicyManager::setBeaconMute(bool mute) {
4080    ALOGV("setBeaconMute(%d) mBeaconMuteRefCount=%d mBeaconPlayingRefCount=%d",
4081            mute, mBeaconMuteRefCount, mBeaconPlayingRefCount);
4082    // keep track of muted state to avoid repeating mute/unmute operations
4083    if (mBeaconMuted != mute) {
4084        // mute/unmute AUDIO_STREAM_TTS on all outputs
4085        ALOGV("\t muting %d", mute);
4086        uint32_t maxLatency = 0;
4087        for (size_t i = 0; i < mOutputs.size(); i++) {
4088            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
4089            setStreamMute(AUDIO_STREAM_TTS, mute/*on*/,
4090                    desc->mIoHandle,
4091                    0 /*delay*/, AUDIO_DEVICE_NONE);
4092            const uint32_t latency = desc->latency() * 2;
4093            if (latency > maxLatency) {
4094                maxLatency = latency;
4095            }
4096        }
4097        mBeaconMuted = mute;
4098        return maxLatency;
4099    }
4100    return 0;
4101}
4102
4103audio_devices_t AudioPolicyManager::getDeviceForStrategy(routing_strategy strategy,
4104                                                             bool fromCache)
4105{
4106    uint32_t device = AUDIO_DEVICE_NONE;
4107
4108    if (fromCache) {
4109        ALOGVV("getDeviceForStrategy() from cache strategy %d, device %x",
4110              strategy, mDeviceForStrategy[strategy]);
4111        return mDeviceForStrategy[strategy];
4112    }
4113    audio_devices_t availableOutputDeviceTypes = mAvailableOutputDevices.types();
4114    switch (strategy) {
4115
4116    case STRATEGY_TRANSMITTED_THROUGH_SPEAKER:
4117        device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4118        if (!device) {
4119            ALOGE("getDeviceForStrategy() no device found for "\
4120                    "STRATEGY_TRANSMITTED_THROUGH_SPEAKER");
4121        }
4122        break;
4123
4124    case STRATEGY_SONIFICATION_RESPECTFUL:
4125        if (isInCall()) {
4126            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
4127        } else if (isStreamActiveRemotely(AUDIO_STREAM_MUSIC,
4128                SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
4129            // while media is playing on a remote device, use the the sonification behavior.
4130            // Note that we test this usecase before testing if media is playing because
4131            //   the isStreamActive() method only informs about the activity of a stream, not
4132            //   if it's for local playback. Note also that we use the same delay between both tests
4133            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
4134            //user "safe" speaker if available instead of normal speaker to avoid triggering
4135            //other acoustic safety mechanisms for notification
4136            if (device == AUDIO_DEVICE_OUT_SPEAKER && (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER_SAFE))
4137                device = AUDIO_DEVICE_OUT_SPEAKER_SAFE;
4138        } else if (isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
4139            // while media is playing (or has recently played), use the same device
4140            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
4141        } else {
4142            // when media is not playing anymore, fall back on the sonification behavior
4143            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
4144            //user "safe" speaker if available instead of normal speaker to avoid triggering
4145            //other acoustic safety mechanisms for notification
4146            if (device == AUDIO_DEVICE_OUT_SPEAKER && (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER_SAFE))
4147                device = AUDIO_DEVICE_OUT_SPEAKER_SAFE;
4148        }
4149
4150        break;
4151
4152    case STRATEGY_DTMF:
4153        if (!isInCall()) {
4154            // when off call, DTMF strategy follows the same rules as MEDIA strategy
4155            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
4156            break;
4157        }
4158        // when in call, DTMF and PHONE strategies follow the same rules
4159        // FALL THROUGH
4160
4161    case STRATEGY_PHONE:
4162        // Force use of only devices on primary output if:
4163        // - in call AND
4164        //   - cannot route from voice call RX OR
4165        //   - audio HAL version is < 3.0 and TX device is on the primary HW module
4166        if (mPhoneState == AUDIO_MODE_IN_CALL) {
4167            audio_devices_t txDevice = getDeviceForInputSource(AUDIO_SOURCE_VOICE_COMMUNICATION);
4168            sp<AudioOutputDescriptor> hwOutputDesc = mOutputs.valueFor(mPrimaryOutput);
4169            if (((mAvailableInputDevices.types() &
4170                    AUDIO_DEVICE_IN_TELEPHONY_RX & ~AUDIO_DEVICE_BIT_IN) == 0) ||
4171                    (((txDevice & availablePrimaryInputDevices() & ~AUDIO_DEVICE_BIT_IN) != 0) &&
4172                         (hwOutputDesc->getAudioPort()->mModule->mHalVersion <
4173                             AUDIO_DEVICE_API_VERSION_3_0))) {
4174                availableOutputDeviceTypes = availablePrimaryOutputDevices();
4175            }
4176        }
4177        // for phone strategy, we first consider the forced use and then the available devices by order
4178        // of priority
4179        switch (mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]) {
4180        case AUDIO_POLICY_FORCE_BT_SCO:
4181            if (!isInCall() || strategy != STRATEGY_DTMF) {
4182                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT;
4183                if (device) break;
4184            }
4185            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET;
4186            if (device) break;
4187            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO;
4188            if (device) break;
4189            // if SCO device is requested but no SCO device is available, fall back to default case
4190            // FALL THROUGH
4191
4192        default:    // FORCE_NONE
4193            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to A2DP
4194            if (!isInCall() &&
4195                    (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
4196                    (getA2dpOutput() != 0)) {
4197                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP;
4198                if (device) break;
4199                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
4200                if (device) break;
4201            }
4202            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
4203            if (device) break;
4204            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADSET;
4205            if (device) break;
4206            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
4207            if (device) break;
4208            if (mPhoneState != AUDIO_MODE_IN_CALL) {
4209                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
4210                if (device) break;
4211                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
4212                if (device) break;
4213                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
4214                if (device) break;
4215                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
4216                if (device) break;
4217            }
4218            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_EARPIECE;
4219            if (device) break;
4220            device = mDefaultOutputDevice->mDeviceType;
4221            if (device == AUDIO_DEVICE_NONE) {
4222                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE");
4223            }
4224            break;
4225
4226        case AUDIO_POLICY_FORCE_SPEAKER:
4227            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to
4228            // A2DP speaker when forcing to speaker output
4229            if (!isInCall() &&
4230                    (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
4231                    (getA2dpOutput() != 0)) {
4232                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
4233                if (device) break;
4234            }
4235            if (mPhoneState != AUDIO_MODE_IN_CALL) {
4236                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
4237                if (device) break;
4238                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
4239                if (device) break;
4240                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
4241                if (device) break;
4242                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
4243                if (device) break;
4244                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
4245                if (device) break;
4246            }
4247            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_LINE;
4248            if (device) break;
4249            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4250            if (device) break;
4251            device = mDefaultOutputDevice->mDeviceType;
4252            if (device == AUDIO_DEVICE_NONE) {
4253                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE, FORCE_SPEAKER");
4254            }
4255            break;
4256        }
4257    break;
4258
4259    case STRATEGY_SONIFICATION:
4260
4261        // If incall, just select the STRATEGY_PHONE device: The rest of the behavior is handled by
4262        // handleIncallSonification().
4263        if (isInCall()) {
4264            device = getDeviceForStrategy(STRATEGY_PHONE, false /*fromCache*/);
4265            break;
4266        }
4267        // FALL THROUGH
4268
4269    case STRATEGY_ENFORCED_AUDIBLE:
4270        // strategy STRATEGY_ENFORCED_AUDIBLE uses same routing policy as STRATEGY_SONIFICATION
4271        // except:
4272        //   - when in call where it doesn't default to STRATEGY_PHONE behavior
4273        //   - in countries where not enforced in which case it follows STRATEGY_MEDIA
4274
4275        if ((strategy == STRATEGY_SONIFICATION) ||
4276                (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_SYSTEM_ENFORCED)) {
4277            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4278            if (device == AUDIO_DEVICE_NONE) {
4279                ALOGE("getDeviceForStrategy() speaker device not found for STRATEGY_SONIFICATION");
4280            }
4281        }
4282        // The second device used for sonification is the same as the device used by media strategy
4283        // FALL THROUGH
4284
4285    case STRATEGY_MEDIA: {
4286        uint32_t device2 = AUDIO_DEVICE_NONE;
4287        if (strategy != STRATEGY_SONIFICATION) {
4288            // no sonification on remote submix (e.g. WFD)
4289            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_REMOTE_SUBMIX;
4290        }
4291        if ((device2 == AUDIO_DEVICE_NONE) &&
4292                (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
4293                (getA2dpOutput() != 0)) {
4294            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP;
4295            if (device2 == AUDIO_DEVICE_NONE) {
4296                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
4297            }
4298            if (device2 == AUDIO_DEVICE_NONE) {
4299                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
4300            }
4301        }
4302        if ((device2 == AUDIO_DEVICE_NONE) &&
4303            (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] == AUDIO_POLICY_FORCE_SPEAKER)) {
4304            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4305        }
4306        if (device2 == AUDIO_DEVICE_NONE) {
4307            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
4308        }
4309        if ((device2 == AUDIO_DEVICE_NONE)) {
4310            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_LINE;
4311        }
4312        if (device2 == AUDIO_DEVICE_NONE) {
4313            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADSET;
4314        }
4315        if (device2 == AUDIO_DEVICE_NONE) {
4316            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
4317        }
4318        if (device2 == AUDIO_DEVICE_NONE) {
4319            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
4320        }
4321        if (device2 == AUDIO_DEVICE_NONE) {
4322            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
4323        }
4324        if ((device2 == AUDIO_DEVICE_NONE) && (strategy != STRATEGY_SONIFICATION)) {
4325            // no sonification on aux digital (e.g. HDMI)
4326            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
4327        }
4328        if ((device2 == AUDIO_DEVICE_NONE) &&
4329                (mForceUse[AUDIO_POLICY_FORCE_FOR_DOCK] == AUDIO_POLICY_FORCE_ANALOG_DOCK)) {
4330            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
4331        }
4332        if (device2 == AUDIO_DEVICE_NONE) {
4333            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4334        }
4335        int device3 = AUDIO_DEVICE_NONE;
4336        if (strategy == STRATEGY_MEDIA) {
4337            // ARC, SPDIF and AUX_LINE can co-exist with others.
4338            device3 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_HDMI_ARC;
4339            device3 |= (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPDIF);
4340            device3 |= (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_LINE);
4341        }
4342
4343        device2 |= device3;
4344        // device is DEVICE_OUT_SPEAKER if we come from case STRATEGY_SONIFICATION or
4345        // STRATEGY_ENFORCED_AUDIBLE, AUDIO_DEVICE_NONE otherwise
4346        device |= device2;
4347
4348        // If hdmi system audio mode is on, remove speaker out of output list.
4349        if ((strategy == STRATEGY_MEDIA) &&
4350            (mForceUse[AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO] ==
4351                AUDIO_POLICY_FORCE_HDMI_SYSTEM_AUDIO_ENFORCED)) {
4352            device &= ~AUDIO_DEVICE_OUT_SPEAKER;
4353        }
4354
4355        if (device) break;
4356        device = mDefaultOutputDevice->mDeviceType;
4357        if (device == AUDIO_DEVICE_NONE) {
4358            ALOGE("getDeviceForStrategy() no device found for STRATEGY_MEDIA");
4359        }
4360        } break;
4361
4362    default:
4363        ALOGW("getDeviceForStrategy() unknown strategy: %d", strategy);
4364        break;
4365    }
4366
4367    ALOGVV("getDeviceForStrategy() strategy %d, device %x", strategy, device);
4368    return device;
4369}
4370
4371void AudioPolicyManager::updateDevicesAndOutputs()
4372{
4373    for (int i = 0; i < NUM_STRATEGIES; i++) {
4374        mDeviceForStrategy[i] = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
4375    }
4376    mPreviousOutputs = mOutputs;
4377}
4378
4379uint32_t AudioPolicyManager::checkDeviceMuteStrategies(sp<AudioOutputDescriptor> outputDesc,
4380                                                       audio_devices_t prevDevice,
4381                                                       uint32_t delayMs)
4382{
4383    // mute/unmute strategies using an incompatible device combination
4384    // if muting, wait for the audio in pcm buffer to be drained before proceeding
4385    // if unmuting, unmute only after the specified delay
4386    if (outputDesc->isDuplicated()) {
4387        return 0;
4388    }
4389
4390    uint32_t muteWaitMs = 0;
4391    audio_devices_t device = outputDesc->device();
4392    bool shouldMute = outputDesc->isActive() && (popcount(device) >= 2);
4393
4394    for (size_t i = 0; i < NUM_STRATEGIES; i++) {
4395        audio_devices_t curDevice = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
4396        curDevice = curDevice & outputDesc->mProfile->mSupportedDevices.types();
4397        bool mute = shouldMute && (curDevice & device) && (curDevice != device);
4398        bool doMute = false;
4399
4400        if (mute && !outputDesc->mStrategyMutedByDevice[i]) {
4401            doMute = true;
4402            outputDesc->mStrategyMutedByDevice[i] = true;
4403        } else if (!mute && outputDesc->mStrategyMutedByDevice[i]){
4404            doMute = true;
4405            outputDesc->mStrategyMutedByDevice[i] = false;
4406        }
4407        if (doMute) {
4408            for (size_t j = 0; j < mOutputs.size(); j++) {
4409                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(j);
4410                // skip output if it does not share any device with current output
4411                if ((desc->supportedDevices() & outputDesc->supportedDevices())
4412                        == AUDIO_DEVICE_NONE) {
4413                    continue;
4414                }
4415                audio_io_handle_t curOutput = mOutputs.keyAt(j);
4416                ALOGVV("checkDeviceMuteStrategies() %s strategy %d (curDevice %04x) on output %d",
4417                      mute ? "muting" : "unmuting", i, curDevice, curOutput);
4418                setStrategyMute((routing_strategy)i, mute, curOutput, mute ? 0 : delayMs);
4419                if (desc->isStrategyActive((routing_strategy)i)) {
4420                    if (mute) {
4421                        // FIXME: should not need to double latency if volume could be applied
4422                        // immediately by the audioflinger mixer. We must account for the delay
4423                        // between now and the next time the audioflinger thread for this output
4424                        // will process a buffer (which corresponds to one buffer size,
4425                        // usually 1/2 or 1/4 of the latency).
4426                        if (muteWaitMs < desc->latency() * 2) {
4427                            muteWaitMs = desc->latency() * 2;
4428                        }
4429                    }
4430                }
4431            }
4432        }
4433    }
4434
4435    // temporary mute output if device selection changes to avoid volume bursts due to
4436    // different per device volumes
4437    if (outputDesc->isActive() && (device != prevDevice)) {
4438        if (muteWaitMs < outputDesc->latency() * 2) {
4439            muteWaitMs = outputDesc->latency() * 2;
4440        }
4441        for (size_t i = 0; i < NUM_STRATEGIES; i++) {
4442            if (outputDesc->isStrategyActive((routing_strategy)i)) {
4443                setStrategyMute((routing_strategy)i, true, outputDesc->mIoHandle);
4444                // do tempMute unmute after twice the mute wait time
4445                setStrategyMute((routing_strategy)i, false, outputDesc->mIoHandle,
4446                                muteWaitMs *2, device);
4447            }
4448        }
4449    }
4450
4451    // wait for the PCM output buffers to empty before proceeding with the rest of the command
4452    if (muteWaitMs > delayMs) {
4453        muteWaitMs -= delayMs;
4454        usleep(muteWaitMs * 1000);
4455        return muteWaitMs;
4456    }
4457    return 0;
4458}
4459
4460uint32_t AudioPolicyManager::setOutputDevice(audio_io_handle_t output,
4461                                             audio_devices_t device,
4462                                             bool force,
4463                                             int delayMs,
4464                                             audio_patch_handle_t *patchHandle,
4465                                             const char* address)
4466{
4467    ALOGV("setOutputDevice() output %d device %04x delayMs %d", output, device, delayMs);
4468    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4469    AudioParameter param;
4470    uint32_t muteWaitMs;
4471
4472    if (outputDesc->isDuplicated()) {
4473        muteWaitMs = setOutputDevice(outputDesc->mOutput1->mIoHandle, device, force, delayMs);
4474        muteWaitMs += setOutputDevice(outputDesc->mOutput2->mIoHandle, device, force, delayMs);
4475        return muteWaitMs;
4476    }
4477    // no need to proceed if new device is not AUDIO_DEVICE_NONE and not supported by current
4478    // output profile
4479    if ((device != AUDIO_DEVICE_NONE) &&
4480            ((device & outputDesc->mProfile->mSupportedDevices.types()) == 0)) {
4481        return 0;
4482    }
4483
4484    // filter devices according to output selected
4485    device = (audio_devices_t)(device & outputDesc->mProfile->mSupportedDevices.types());
4486
4487    audio_devices_t prevDevice = outputDesc->mDevice;
4488
4489    ALOGV("setOutputDevice() prevDevice %04x", prevDevice);
4490
4491    if (device != AUDIO_DEVICE_NONE) {
4492        outputDesc->mDevice = device;
4493    }
4494    muteWaitMs = checkDeviceMuteStrategies(outputDesc, prevDevice, delayMs);
4495
4496    // Do not change the routing if:
4497    //      the requested device is AUDIO_DEVICE_NONE
4498    //      OR the requested device is the same as current device
4499    //  AND force is not specified
4500    //  AND the output is connected by a valid audio patch.
4501    // Doing this check here allows the caller to call setOutputDevice() without conditions
4502    if ((device == AUDIO_DEVICE_NONE || device == prevDevice) && !force &&
4503            outputDesc->mPatchHandle != 0) {
4504        ALOGV("setOutputDevice() setting same device %04x or null device for output %d",
4505              device, output);
4506        return muteWaitMs;
4507    }
4508
4509    ALOGV("setOutputDevice() changing device");
4510
4511    // do the routing
4512    if (device == AUDIO_DEVICE_NONE) {
4513        resetOutputDevice(output, delayMs, NULL);
4514    } else {
4515        DeviceVector deviceList = (address == NULL) ?
4516                mAvailableOutputDevices.getDevicesFromType(device)
4517                : mAvailableOutputDevices.getDevicesFromTypeAddr(device, String8(address));
4518        if (!deviceList.isEmpty()) {
4519            struct audio_patch patch;
4520            outputDesc->toAudioPortConfig(&patch.sources[0]);
4521            patch.num_sources = 1;
4522            patch.num_sinks = 0;
4523            for (size_t i = 0; i < deviceList.size() && i < AUDIO_PATCH_PORTS_MAX; i++) {
4524                deviceList.itemAt(i)->toAudioPortConfig(&patch.sinks[i]);
4525                patch.num_sinks++;
4526            }
4527            ssize_t index;
4528            if (patchHandle && *patchHandle != AUDIO_PATCH_HANDLE_NONE) {
4529                index = mAudioPatches.indexOfKey(*patchHandle);
4530            } else {
4531                index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
4532            }
4533            sp< AudioPatch> patchDesc;
4534            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
4535            if (index >= 0) {
4536                patchDesc = mAudioPatches.valueAt(index);
4537                afPatchHandle = patchDesc->mAfPatchHandle;
4538            }
4539
4540            status_t status = mpClientInterface->createAudioPatch(&patch,
4541                                                                   &afPatchHandle,
4542                                                                   delayMs);
4543            ALOGV("setOutputDevice() createAudioPatch returned %d patchHandle %d"
4544                    "num_sources %d num_sinks %d",
4545                                       status, afPatchHandle, patch.num_sources, patch.num_sinks);
4546            if (status == NO_ERROR) {
4547                if (index < 0) {
4548                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
4549                                               &patch, mUidCached);
4550                    addAudioPatch(patchDesc->mHandle, patchDesc);
4551                } else {
4552                    patchDesc->mPatch = patch;
4553                }
4554                patchDesc->mAfPatchHandle = afPatchHandle;
4555                patchDesc->mUid = mUidCached;
4556                if (patchHandle) {
4557                    *patchHandle = patchDesc->mHandle;
4558                }
4559                outputDesc->mPatchHandle = patchDesc->mHandle;
4560                nextAudioPortGeneration();
4561                mpClientInterface->onAudioPatchListUpdate();
4562            }
4563        }
4564
4565        // inform all input as well
4566        for (size_t i = 0; i < mInputs.size(); i++) {
4567            const sp<AudioInputDescriptor>  inputDescriptor = mInputs.valueAt(i);
4568            if (!isVirtualInputDevice(inputDescriptor->mDevice)) {
4569                AudioParameter inputCmd = AudioParameter();
4570                ALOGV("%s: inform input %d of device:%d", __func__,
4571                      inputDescriptor->mIoHandle, device);
4572                inputCmd.addInt(String8(AudioParameter::keyRouting),device);
4573                mpClientInterface->setParameters(inputDescriptor->mIoHandle,
4574                                                 inputCmd.toString(),
4575                                                 delayMs);
4576            }
4577        }
4578    }
4579
4580    // update stream volumes according to new device
4581    applyStreamVolumes(output, device, delayMs);
4582
4583    return muteWaitMs;
4584}
4585
4586status_t AudioPolicyManager::resetOutputDevice(audio_io_handle_t output,
4587                                               int delayMs,
4588                                               audio_patch_handle_t *patchHandle)
4589{
4590    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4591    ssize_t index;
4592    if (patchHandle) {
4593        index = mAudioPatches.indexOfKey(*patchHandle);
4594    } else {
4595        index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
4596    }
4597    if (index < 0) {
4598        return INVALID_OPERATION;
4599    }
4600    sp< AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4601    status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, delayMs);
4602    ALOGV("resetOutputDevice() releaseAudioPatch returned %d", status);
4603    outputDesc->mPatchHandle = 0;
4604    removeAudioPatch(patchDesc->mHandle);
4605    nextAudioPortGeneration();
4606    mpClientInterface->onAudioPatchListUpdate();
4607    return status;
4608}
4609
4610status_t AudioPolicyManager::setInputDevice(audio_io_handle_t input,
4611                                            audio_devices_t device,
4612                                            bool force,
4613                                            audio_patch_handle_t *patchHandle)
4614{
4615    status_t status = NO_ERROR;
4616
4617    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
4618    if ((device != AUDIO_DEVICE_NONE) && ((device != inputDesc->mDevice) || force)) {
4619        inputDesc->mDevice = device;
4620
4621        DeviceVector deviceList = mAvailableInputDevices.getDevicesFromType(device);
4622        if (!deviceList.isEmpty()) {
4623            struct audio_patch patch;
4624            inputDesc->toAudioPortConfig(&patch.sinks[0]);
4625            // AUDIO_SOURCE_HOTWORD is for internal use only:
4626            // handled as AUDIO_SOURCE_VOICE_RECOGNITION by the audio HAL
4627            if (patch.sinks[0].ext.mix.usecase.source == AUDIO_SOURCE_HOTWORD &&
4628                    !inputDesc->mIsSoundTrigger) {
4629                patch.sinks[0].ext.mix.usecase.source = AUDIO_SOURCE_VOICE_RECOGNITION;
4630            }
4631            patch.num_sinks = 1;
4632            //only one input device for now
4633            deviceList.itemAt(0)->toAudioPortConfig(&patch.sources[0]);
4634            patch.num_sources = 1;
4635            ssize_t index;
4636            if (patchHandle && *patchHandle != AUDIO_PATCH_HANDLE_NONE) {
4637                index = mAudioPatches.indexOfKey(*patchHandle);
4638            } else {
4639                index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
4640            }
4641            sp< AudioPatch> patchDesc;
4642            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
4643            if (index >= 0) {
4644                patchDesc = mAudioPatches.valueAt(index);
4645                afPatchHandle = patchDesc->mAfPatchHandle;
4646            }
4647
4648            status_t status = mpClientInterface->createAudioPatch(&patch,
4649                                                                  &afPatchHandle,
4650                                                                  0);
4651            ALOGV("setInputDevice() createAudioPatch returned %d patchHandle %d",
4652                                                                          status, afPatchHandle);
4653            if (status == NO_ERROR) {
4654                if (index < 0) {
4655                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
4656                                               &patch, mUidCached);
4657                    addAudioPatch(patchDesc->mHandle, patchDesc);
4658                } else {
4659                    patchDesc->mPatch = patch;
4660                }
4661                patchDesc->mAfPatchHandle = afPatchHandle;
4662                patchDesc->mUid = mUidCached;
4663                if (patchHandle) {
4664                    *patchHandle = patchDesc->mHandle;
4665                }
4666                inputDesc->mPatchHandle = patchDesc->mHandle;
4667                nextAudioPortGeneration();
4668                mpClientInterface->onAudioPatchListUpdate();
4669            }
4670        }
4671    }
4672    return status;
4673}
4674
4675status_t AudioPolicyManager::resetInputDevice(audio_io_handle_t input,
4676                                              audio_patch_handle_t *patchHandle)
4677{
4678    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
4679    ssize_t index;
4680    if (patchHandle) {
4681        index = mAudioPatches.indexOfKey(*patchHandle);
4682    } else {
4683        index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
4684    }
4685    if (index < 0) {
4686        return INVALID_OPERATION;
4687    }
4688    sp< AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4689    status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
4690    ALOGV("resetInputDevice() releaseAudioPatch returned %d", status);
4691    inputDesc->mPatchHandle = 0;
4692    removeAudioPatch(patchDesc->mHandle);
4693    nextAudioPortGeneration();
4694    mpClientInterface->onAudioPatchListUpdate();
4695    return status;
4696}
4697
4698sp<AudioPolicyManager::IOProfile> AudioPolicyManager::getInputProfile(audio_devices_t device,
4699                                                   uint32_t& samplingRate,
4700                                                   audio_format_t format,
4701                                                   audio_channel_mask_t channelMask,
4702                                                   audio_input_flags_t flags)
4703{
4704    // Choose an input profile based on the requested capture parameters: select the first available
4705    // profile supporting all requested parameters.
4706
4707    for (size_t i = 0; i < mHwModules.size(); i++)
4708    {
4709        if (mHwModules[i]->mHandle == 0) {
4710            continue;
4711        }
4712        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
4713        {
4714            sp<IOProfile> profile = mHwModules[i]->mInputProfiles[j];
4715            // profile->log();
4716            if (profile->isCompatibleProfile(device, samplingRate,
4717                                             &samplingRate /*updatedSamplingRate*/,
4718                                             format, channelMask, (audio_output_flags_t) flags)) {
4719                return profile;
4720            }
4721        }
4722    }
4723    return NULL;
4724}
4725
4726audio_devices_t AudioPolicyManager::getDeviceForInputSource(audio_source_t inputSource)
4727{
4728    uint32_t device = AUDIO_DEVICE_NONE;
4729    audio_devices_t availableDeviceTypes = mAvailableInputDevices.types() &
4730                                            ~AUDIO_DEVICE_BIT_IN;
4731    switch (inputSource) {
4732    case AUDIO_SOURCE_VOICE_UPLINK:
4733      if (availableDeviceTypes & AUDIO_DEVICE_IN_VOICE_CALL) {
4734          device = AUDIO_DEVICE_IN_VOICE_CALL;
4735          break;
4736      }
4737      break;
4738
4739    case AUDIO_SOURCE_DEFAULT:
4740    case AUDIO_SOURCE_MIC:
4741    if (availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_A2DP) {
4742        device = AUDIO_DEVICE_IN_BLUETOOTH_A2DP;
4743    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
4744        device = AUDIO_DEVICE_IN_WIRED_HEADSET;
4745    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
4746        device = AUDIO_DEVICE_IN_USB_DEVICE;
4747    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4748        device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4749    }
4750    break;
4751
4752    case AUDIO_SOURCE_VOICE_COMMUNICATION:
4753        // Allow only use of devices on primary input if in call and HAL does not support routing
4754        // to voice call path.
4755        if ((mPhoneState == AUDIO_MODE_IN_CALL) &&
4756                (mAvailableOutputDevices.types() & AUDIO_DEVICE_OUT_TELEPHONY_TX) == 0) {
4757            availableDeviceTypes = availablePrimaryInputDevices() & ~AUDIO_DEVICE_BIT_IN;
4758        }
4759
4760        switch (mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]) {
4761        case AUDIO_POLICY_FORCE_BT_SCO:
4762            // if SCO device is requested but no SCO device is available, fall back to default case
4763            if (availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) {
4764                device = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET;
4765                break;
4766            }
4767            // FALL THROUGH
4768
4769        default:    // FORCE_NONE
4770            if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
4771                device = AUDIO_DEVICE_IN_WIRED_HEADSET;
4772            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
4773                device = AUDIO_DEVICE_IN_USB_DEVICE;
4774            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4775                device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4776            }
4777            break;
4778
4779        case AUDIO_POLICY_FORCE_SPEAKER:
4780            if (availableDeviceTypes & AUDIO_DEVICE_IN_BACK_MIC) {
4781                device = AUDIO_DEVICE_IN_BACK_MIC;
4782            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4783                device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4784            }
4785            break;
4786        }
4787        break;
4788
4789    case AUDIO_SOURCE_VOICE_RECOGNITION:
4790    case AUDIO_SOURCE_HOTWORD:
4791        if (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] == AUDIO_POLICY_FORCE_BT_SCO &&
4792                availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) {
4793            device = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET;
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    case AUDIO_SOURCE_CAMCORDER:
4803        if (availableDeviceTypes & AUDIO_DEVICE_IN_BACK_MIC) {
4804            device = AUDIO_DEVICE_IN_BACK_MIC;
4805        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4806            device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4807        }
4808        break;
4809    case AUDIO_SOURCE_VOICE_DOWNLINK:
4810    case AUDIO_SOURCE_VOICE_CALL:
4811        if (availableDeviceTypes & AUDIO_DEVICE_IN_VOICE_CALL) {
4812            device = AUDIO_DEVICE_IN_VOICE_CALL;
4813        }
4814        break;
4815    case AUDIO_SOURCE_REMOTE_SUBMIX:
4816        if (availableDeviceTypes & AUDIO_DEVICE_IN_REMOTE_SUBMIX) {
4817            device = AUDIO_DEVICE_IN_REMOTE_SUBMIX;
4818        }
4819        break;
4820     case AUDIO_SOURCE_FM_TUNER:
4821        if (availableDeviceTypes & AUDIO_DEVICE_IN_FM_TUNER) {
4822            device = AUDIO_DEVICE_IN_FM_TUNER;
4823        }
4824        break;
4825    default:
4826        ALOGW("getDeviceForInputSource() invalid input source %d", inputSource);
4827        break;
4828    }
4829    ALOGV("getDeviceForInputSource()input source %d, device %08x", inputSource, device);
4830    return device;
4831}
4832
4833bool AudioPolicyManager::isVirtualInputDevice(audio_devices_t device)
4834{
4835    if ((device & AUDIO_DEVICE_BIT_IN) != 0) {
4836        device &= ~AUDIO_DEVICE_BIT_IN;
4837        if ((popcount(device) == 1) && ((device & ~APM_AUDIO_IN_DEVICE_VIRTUAL_ALL) == 0))
4838            return true;
4839    }
4840    return false;
4841}
4842
4843bool AudioPolicyManager::deviceDistinguishesOnAddress(audio_devices_t device) {
4844    return ((device & APM_AUDIO_DEVICE_MATCH_ADDRESS_ALL) != 0);
4845}
4846
4847audio_io_handle_t AudioPolicyManager::getActiveInput(bool ignoreVirtualInputs)
4848{
4849    for (size_t i = 0; i < mInputs.size(); i++) {
4850        const sp<AudioInputDescriptor>  input_descriptor = mInputs.valueAt(i);
4851        if ((input_descriptor->mRefCount > 0)
4852                && (!ignoreVirtualInputs || !isVirtualInputDevice(input_descriptor->mDevice))) {
4853            return mInputs.keyAt(i);
4854        }
4855    }
4856    return 0;
4857}
4858
4859uint32_t AudioPolicyManager::activeInputsCount() const
4860{
4861    uint32_t count = 0;
4862    for (size_t i = 0; i < mInputs.size(); i++) {
4863        const sp<AudioInputDescriptor>  desc = mInputs.valueAt(i);
4864        if (desc->mRefCount > 0) {
4865            return count++;
4866        }
4867    }
4868    return count;
4869}
4870
4871
4872audio_devices_t AudioPolicyManager::getDeviceForVolume(audio_devices_t device)
4873{
4874    if (device == AUDIO_DEVICE_NONE) {
4875        // this happens when forcing a route update and no track is active on an output.
4876        // In this case the returned category is not important.
4877        device =  AUDIO_DEVICE_OUT_SPEAKER;
4878    } else if (popcount(device) > 1) {
4879        // Multiple device selection is either:
4880        //  - speaker + one other device: give priority to speaker in this case.
4881        //  - one A2DP device + another device: happens with duplicated output. In this case
4882        // retain the device on the A2DP output as the other must not correspond to an active
4883        // selection if not the speaker.
4884        //  - HDMI-CEC system audio mode only output: give priority to available item in order.
4885        if (device & AUDIO_DEVICE_OUT_SPEAKER) {
4886            device = AUDIO_DEVICE_OUT_SPEAKER;
4887        } else if (device & AUDIO_DEVICE_OUT_HDMI_ARC) {
4888            device = AUDIO_DEVICE_OUT_HDMI_ARC;
4889        } else if (device & AUDIO_DEVICE_OUT_AUX_LINE) {
4890            device = AUDIO_DEVICE_OUT_AUX_LINE;
4891        } else if (device & AUDIO_DEVICE_OUT_SPDIF) {
4892            device = AUDIO_DEVICE_OUT_SPDIF;
4893        } else {
4894            device = (audio_devices_t)(device & AUDIO_DEVICE_OUT_ALL_A2DP);
4895        }
4896    }
4897
4898    /*SPEAKER_SAFE is an alias of SPEAKER for purposes of volume control*/
4899    if (device == AUDIO_DEVICE_OUT_SPEAKER_SAFE)
4900        device = AUDIO_DEVICE_OUT_SPEAKER;
4901
4902    ALOGW_IF(popcount(device) != 1,
4903            "getDeviceForVolume() invalid device combination: %08x",
4904            device);
4905
4906    return device;
4907}
4908
4909AudioPolicyManager::device_category AudioPolicyManager::getDeviceCategory(audio_devices_t device)
4910{
4911    switch(getDeviceForVolume(device)) {
4912        case AUDIO_DEVICE_OUT_EARPIECE:
4913            return DEVICE_CATEGORY_EARPIECE;
4914        case AUDIO_DEVICE_OUT_WIRED_HEADSET:
4915        case AUDIO_DEVICE_OUT_WIRED_HEADPHONE:
4916        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO:
4917        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET:
4918        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP:
4919        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES:
4920            return DEVICE_CATEGORY_HEADSET;
4921        case AUDIO_DEVICE_OUT_LINE:
4922        case AUDIO_DEVICE_OUT_AUX_DIGITAL:
4923        /*USB?  Remote submix?*/
4924            return DEVICE_CATEGORY_EXT_MEDIA;
4925        case AUDIO_DEVICE_OUT_SPEAKER:
4926        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT:
4927        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER:
4928        case AUDIO_DEVICE_OUT_USB_ACCESSORY:
4929        case AUDIO_DEVICE_OUT_USB_DEVICE:
4930        case AUDIO_DEVICE_OUT_REMOTE_SUBMIX:
4931        default:
4932            return DEVICE_CATEGORY_SPEAKER;
4933    }
4934}
4935
4936float AudioPolicyManager::volIndexToAmpl(audio_devices_t device, const StreamDescriptor& streamDesc,
4937        int indexInUi)
4938{
4939    device_category deviceCategory = getDeviceCategory(device);
4940    const VolumeCurvePoint *curve = streamDesc.mVolumeCurve[deviceCategory];
4941
4942    // the volume index in the UI is relative to the min and max volume indices for this stream type
4943    int nbSteps = 1 + curve[VOLMAX].mIndex -
4944            curve[VOLMIN].mIndex;
4945    int volIdx = (nbSteps * (indexInUi - streamDesc.mIndexMin)) /
4946            (streamDesc.mIndexMax - streamDesc.mIndexMin);
4947
4948    // find what part of the curve this index volume belongs to, or if it's out of bounds
4949    int segment = 0;
4950    if (volIdx < curve[VOLMIN].mIndex) {         // out of bounds
4951        return 0.0f;
4952    } else if (volIdx < curve[VOLKNEE1].mIndex) {
4953        segment = 0;
4954    } else if (volIdx < curve[VOLKNEE2].mIndex) {
4955        segment = 1;
4956    } else if (volIdx <= curve[VOLMAX].mIndex) {
4957        segment = 2;
4958    } else {                                                               // out of bounds
4959        return 1.0f;
4960    }
4961
4962    // linear interpolation in the attenuation table in dB
4963    float decibels = curve[segment].mDBAttenuation +
4964            ((float)(volIdx - curve[segment].mIndex)) *
4965                ( (curve[segment+1].mDBAttenuation -
4966                        curve[segment].mDBAttenuation) /
4967                    ((float)(curve[segment+1].mIndex -
4968                            curve[segment].mIndex)) );
4969
4970    float amplification = exp( decibels * 0.115129f); // exp( dB * ln(10) / 20 )
4971
4972    ALOGVV("VOLUME vol index=[%d %d %d], dB=[%.1f %.1f %.1f] ampl=%.5f",
4973            curve[segment].mIndex, volIdx,
4974            curve[segment+1].mIndex,
4975            curve[segment].mDBAttenuation,
4976            decibels,
4977            curve[segment+1].mDBAttenuation,
4978            amplification);
4979
4980    return amplification;
4981}
4982
4983const AudioPolicyManager::VolumeCurvePoint
4984    AudioPolicyManager::sDefaultVolumeCurve[AudioPolicyManager::VOLCNT] = {
4985    {1, -49.5f}, {33, -33.5f}, {66, -17.0f}, {100, 0.0f}
4986};
4987
4988const AudioPolicyManager::VolumeCurvePoint
4989    AudioPolicyManager::sDefaultMediaVolumeCurve[AudioPolicyManager::VOLCNT] = {
4990    {1, -58.0f}, {20, -40.0f}, {60, -17.0f}, {100, 0.0f}
4991};
4992
4993const AudioPolicyManager::VolumeCurvePoint
4994    AudioPolicyManager::sExtMediaSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
4995    {1, -58.0f}, {20, -40.0f}, {60, -21.0f}, {100, -10.0f}
4996};
4997
4998const AudioPolicyManager::VolumeCurvePoint
4999    AudioPolicyManager::sSpeakerMediaVolumeCurve[AudioPolicyManager::VOLCNT] = {
5000    {1, -56.0f}, {20, -34.0f}, {60, -11.0f}, {100, 0.0f}
5001};
5002
5003const AudioPolicyManager::VolumeCurvePoint
5004    AudioPolicyManager::sSpeakerMediaVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
5005    {1, -55.0f}, {20, -43.0f}, {86, -12.0f}, {100, 0.0f}
5006};
5007
5008const AudioPolicyManager::VolumeCurvePoint
5009    AudioPolicyManager::sSpeakerSonificationVolumeCurve[AudioPolicyManager::VOLCNT] = {
5010    {1, -29.7f}, {33, -20.1f}, {66, -10.2f}, {100, 0.0f}
5011};
5012
5013const AudioPolicyManager::VolumeCurvePoint
5014    AudioPolicyManager::sSpeakerSonificationVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
5015    {1, -35.7f}, {33, -26.1f}, {66, -13.2f}, {100, 0.0f}
5016};
5017
5018// AUDIO_STREAM_SYSTEM, AUDIO_STREAM_ENFORCED_AUDIBLE and AUDIO_STREAM_DTMF volume tracks
5019// AUDIO_STREAM_RING on phones and AUDIO_STREAM_MUSIC on tablets.
5020// AUDIO_STREAM_DTMF tracks AUDIO_STREAM_VOICE_CALL while in call (See AudioService.java).
5021// The range is constrained between -24dB and -6dB over speaker and -30dB and -18dB over headset.
5022
5023const AudioPolicyManager::VolumeCurvePoint
5024    AudioPolicyManager::sDefaultSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
5025    {1, -24.0f}, {33, -18.0f}, {66, -12.0f}, {100, -6.0f}
5026};
5027
5028const AudioPolicyManager::VolumeCurvePoint
5029    AudioPolicyManager::sDefaultSystemVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
5030    {1, -34.0f}, {33, -24.0f}, {66, -15.0f}, {100, -6.0f}
5031};
5032
5033const AudioPolicyManager::VolumeCurvePoint
5034    AudioPolicyManager::sHeadsetSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
5035    {1, -30.0f}, {33, -26.0f}, {66, -22.0f}, {100, -18.0f}
5036};
5037
5038const AudioPolicyManager::VolumeCurvePoint
5039    AudioPolicyManager::sDefaultVoiceVolumeCurve[AudioPolicyManager::VOLCNT] = {
5040    {0, -42.0f}, {33, -28.0f}, {66, -14.0f}, {100, 0.0f}
5041};
5042
5043const AudioPolicyManager::VolumeCurvePoint
5044    AudioPolicyManager::sSpeakerVoiceVolumeCurve[AudioPolicyManager::VOLCNT] = {
5045    {0, -24.0f}, {33, -16.0f}, {66, -8.0f}, {100, 0.0f}
5046};
5047
5048const AudioPolicyManager::VolumeCurvePoint
5049    AudioPolicyManager::sLinearVolumeCurve[AudioPolicyManager::VOLCNT] = {
5050    {0, -96.0f}, {33, -68.0f}, {66, -34.0f}, {100, 0.0f}
5051};
5052
5053const AudioPolicyManager::VolumeCurvePoint
5054    AudioPolicyManager::sSilentVolumeCurve[AudioPolicyManager::VOLCNT] = {
5055    {0, -96.0f}, {1, -96.0f}, {2, -96.0f}, {100, -96.0f}
5056};
5057
5058const AudioPolicyManager::VolumeCurvePoint
5059            *AudioPolicyManager::sVolumeProfiles[AUDIO_STREAM_CNT]
5060                                                   [AudioPolicyManager::DEVICE_CATEGORY_CNT] = {
5061    { // AUDIO_STREAM_VOICE_CALL
5062        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_HEADSET
5063        sSpeakerVoiceVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5064        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5065        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5066    },
5067    { // AUDIO_STREAM_SYSTEM
5068        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
5069        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5070        sDefaultSystemVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
5071        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5072    },
5073    { // AUDIO_STREAM_RING
5074        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
5075        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5076        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
5077        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5078    },
5079    { // AUDIO_STREAM_MUSIC
5080        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
5081        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5082        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5083        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5084    },
5085    { // AUDIO_STREAM_ALARM
5086        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
5087        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5088        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
5089        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5090    },
5091    { // AUDIO_STREAM_NOTIFICATION
5092        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
5093        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5094        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
5095        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5096    },
5097    { // AUDIO_STREAM_BLUETOOTH_SCO
5098        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_HEADSET
5099        sSpeakerVoiceVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5100        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5101        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5102    },
5103    { // AUDIO_STREAM_ENFORCED_AUDIBLE
5104        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
5105        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5106        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5107        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5108    },
5109    {  // AUDIO_STREAM_DTMF
5110        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
5111        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5112        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5113        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5114    },
5115    { // AUDIO_STREAM_TTS
5116      // "Transmitted Through Speaker": always silent except on DEVICE_CATEGORY_SPEAKER
5117        sSilentVolumeCurve, // DEVICE_CATEGORY_HEADSET
5118        sLinearVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5119        sSilentVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5120        sSilentVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5121    },
5122};
5123
5124void AudioPolicyManager::initializeVolumeCurves()
5125{
5126    for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
5127        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
5128            mStreams[i].mVolumeCurve[j] =
5129                    sVolumeProfiles[i][j];
5130        }
5131    }
5132
5133    // Check availability of DRC on speaker path: if available, override some of the speaker curves
5134    if (mSpeakerDrcEnabled) {
5135        mStreams[AUDIO_STREAM_SYSTEM].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5136                sDefaultSystemVolumeCurveDrc;
5137        mStreams[AUDIO_STREAM_RING].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5138                sSpeakerSonificationVolumeCurveDrc;
5139        mStreams[AUDIO_STREAM_ALARM].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5140                sSpeakerSonificationVolumeCurveDrc;
5141        mStreams[AUDIO_STREAM_NOTIFICATION].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5142                sSpeakerSonificationVolumeCurveDrc;
5143        mStreams[AUDIO_STREAM_MUSIC].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5144                sSpeakerMediaVolumeCurveDrc;
5145    }
5146}
5147
5148float AudioPolicyManager::computeVolume(audio_stream_type_t stream,
5149                                            int index,
5150                                            audio_io_handle_t output,
5151                                            audio_devices_t device)
5152{
5153    float volume = 1.0;
5154    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
5155    StreamDescriptor &streamDesc = mStreams[stream];
5156
5157    if (device == AUDIO_DEVICE_NONE) {
5158        device = outputDesc->device();
5159    }
5160
5161    volume = volIndexToAmpl(device, streamDesc, index);
5162
5163    // if a headset is connected, apply the following rules to ring tones and notifications
5164    // to avoid sound level bursts in user's ears:
5165    // - always attenuate ring tones and notifications volume by 6dB
5166    // - if music is playing, always limit the volume to current music volume,
5167    // with a minimum threshold at -36dB so that notification is always perceived.
5168    const routing_strategy stream_strategy = getStrategy(stream);
5169    if ((device & (AUDIO_DEVICE_OUT_BLUETOOTH_A2DP |
5170            AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES |
5171            AUDIO_DEVICE_OUT_WIRED_HEADSET |
5172            AUDIO_DEVICE_OUT_WIRED_HEADPHONE)) &&
5173        ((stream_strategy == STRATEGY_SONIFICATION)
5174                || (stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL)
5175                || (stream == AUDIO_STREAM_SYSTEM)
5176                || ((stream_strategy == STRATEGY_ENFORCED_AUDIBLE) &&
5177                    (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_NONE))) &&
5178        streamDesc.mCanBeMuted) {
5179        volume *= SONIFICATION_HEADSET_VOLUME_FACTOR;
5180        // when the phone is ringing we must consider that music could have been paused just before
5181        // by the music application and behave as if music was active if the last music track was
5182        // just stopped
5183        if (isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY) ||
5184                mLimitRingtoneVolume) {
5185            audio_devices_t musicDevice = getDeviceForStrategy(STRATEGY_MEDIA, true /*fromCache*/);
5186            float musicVol = computeVolume(AUDIO_STREAM_MUSIC,
5187                               mStreams[AUDIO_STREAM_MUSIC].getVolumeIndex(musicDevice),
5188                               output,
5189                               musicDevice);
5190            float minVol = (musicVol > SONIFICATION_HEADSET_VOLUME_MIN) ?
5191                                musicVol : SONIFICATION_HEADSET_VOLUME_MIN;
5192            if (volume > minVol) {
5193                volume = minVol;
5194                ALOGV("computeVolume limiting volume to %f musicVol %f", minVol, musicVol);
5195            }
5196        }
5197    }
5198
5199    return volume;
5200}
5201
5202status_t AudioPolicyManager::checkAndSetVolume(audio_stream_type_t stream,
5203                                                   int index,
5204                                                   audio_io_handle_t output,
5205                                                   audio_devices_t device,
5206                                                   int delayMs,
5207                                                   bool force)
5208{
5209
5210    // do not change actual stream volume if the stream is muted
5211    if (mOutputs.valueFor(output)->mMuteCount[stream] != 0) {
5212        ALOGVV("checkAndSetVolume() stream %d muted count %d",
5213              stream, mOutputs.valueFor(output)->mMuteCount[stream]);
5214        return NO_ERROR;
5215    }
5216
5217    // do not change in call volume if bluetooth is connected and vice versa
5218    if ((stream == AUDIO_STREAM_VOICE_CALL &&
5219            mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] == AUDIO_POLICY_FORCE_BT_SCO) ||
5220        (stream == AUDIO_STREAM_BLUETOOTH_SCO &&
5221                mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] != AUDIO_POLICY_FORCE_BT_SCO)) {
5222        ALOGV("checkAndSetVolume() cannot set stream %d volume with force use = %d for comm",
5223             stream, mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]);
5224        return INVALID_OPERATION;
5225    }
5226
5227    float volume = computeVolume(stream, index, output, device);
5228    // We actually change the volume if:
5229    // - the float value returned by computeVolume() changed
5230    // - the force flag is set
5231    if (volume != mOutputs.valueFor(output)->mCurVolume[stream] ||
5232            force) {
5233        mOutputs.valueFor(output)->mCurVolume[stream] = volume;
5234        ALOGVV("checkAndSetVolume() for output %d stream %d, volume %f, delay %d", output, stream, volume, delayMs);
5235        // Force VOICE_CALL to track BLUETOOTH_SCO stream volume when bluetooth audio is
5236        // enabled
5237        if (stream == AUDIO_STREAM_BLUETOOTH_SCO) {
5238            mpClientInterface->setStreamVolume(AUDIO_STREAM_VOICE_CALL, volume, output, delayMs);
5239        }
5240        mpClientInterface->setStreamVolume(stream, volume, output, delayMs);
5241    }
5242
5243    if (stream == AUDIO_STREAM_VOICE_CALL ||
5244        stream == AUDIO_STREAM_BLUETOOTH_SCO) {
5245        float voiceVolume;
5246        // Force voice volume to max for bluetooth SCO as volume is managed by the headset
5247        if (stream == AUDIO_STREAM_VOICE_CALL) {
5248            voiceVolume = (float)index/(float)mStreams[stream].mIndexMax;
5249        } else {
5250            voiceVolume = 1.0;
5251        }
5252
5253        if (voiceVolume != mLastVoiceVolume && output == mPrimaryOutput) {
5254            mpClientInterface->setVoiceVolume(voiceVolume, delayMs);
5255            mLastVoiceVolume = voiceVolume;
5256        }
5257    }
5258
5259    return NO_ERROR;
5260}
5261
5262void AudioPolicyManager::applyStreamVolumes(audio_io_handle_t output,
5263                                                audio_devices_t device,
5264                                                int delayMs,
5265                                                bool force)
5266{
5267    ALOGVV("applyStreamVolumes() for output %d and device %x", output, device);
5268
5269    for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
5270        checkAndSetVolume((audio_stream_type_t)stream,
5271                          mStreams[stream].getVolumeIndex(device),
5272                          output,
5273                          device,
5274                          delayMs,
5275                          force);
5276    }
5277}
5278
5279void AudioPolicyManager::setStrategyMute(routing_strategy strategy,
5280                                             bool on,
5281                                             audio_io_handle_t output,
5282                                             int delayMs,
5283                                             audio_devices_t device)
5284{
5285    ALOGVV("setStrategyMute() strategy %d, mute %d, output %d", strategy, on, output);
5286    for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
5287        if (getStrategy((audio_stream_type_t)stream) == strategy) {
5288            setStreamMute((audio_stream_type_t)stream, on, output, delayMs, device);
5289        }
5290    }
5291}
5292
5293void AudioPolicyManager::setStreamMute(audio_stream_type_t stream,
5294                                           bool on,
5295                                           audio_io_handle_t output,
5296                                           int delayMs,
5297                                           audio_devices_t device)
5298{
5299    StreamDescriptor &streamDesc = mStreams[stream];
5300    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
5301    if (device == AUDIO_DEVICE_NONE) {
5302        device = outputDesc->device();
5303    }
5304
5305    ALOGVV("setStreamMute() stream %d, mute %d, output %d, mMuteCount %d device %04x",
5306          stream, on, output, outputDesc->mMuteCount[stream], device);
5307
5308    if (on) {
5309        if (outputDesc->mMuteCount[stream] == 0) {
5310            if (streamDesc.mCanBeMuted &&
5311                    ((stream != AUDIO_STREAM_ENFORCED_AUDIBLE) ||
5312                     (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_NONE))) {
5313                checkAndSetVolume(stream, 0, output, device, delayMs);
5314            }
5315        }
5316        // increment mMuteCount after calling checkAndSetVolume() so that volume change is not ignored
5317        outputDesc->mMuteCount[stream]++;
5318    } else {
5319        if (outputDesc->mMuteCount[stream] == 0) {
5320            ALOGV("setStreamMute() unmuting non muted stream!");
5321            return;
5322        }
5323        if (--outputDesc->mMuteCount[stream] == 0) {
5324            checkAndSetVolume(stream,
5325                              streamDesc.getVolumeIndex(device),
5326                              output,
5327                              device,
5328                              delayMs);
5329        }
5330    }
5331}
5332
5333void AudioPolicyManager::handleIncallSonification(audio_stream_type_t stream,
5334                                                      bool starting, bool stateChange)
5335{
5336    // if the stream pertains to sonification strategy and we are in call we must
5337    // mute the stream if it is low visibility. If it is high visibility, we must play a tone
5338    // in the device used for phone strategy and play the tone if the selected device does not
5339    // interfere with the device used for phone strategy
5340    // if stateChange is true, we are called from setPhoneState() and we must mute or unmute as
5341    // many times as there are active tracks on the output
5342    const routing_strategy stream_strategy = getStrategy(stream);
5343    if ((stream_strategy == STRATEGY_SONIFICATION) ||
5344            ((stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL))) {
5345        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
5346        ALOGV("handleIncallSonification() stream %d starting %d device %x stateChange %d",
5347                stream, starting, outputDesc->mDevice, stateChange);
5348        if (outputDesc->mRefCount[stream]) {
5349            int muteCount = 1;
5350            if (stateChange) {
5351                muteCount = outputDesc->mRefCount[stream];
5352            }
5353            if (audio_is_low_visibility(stream)) {
5354                ALOGV("handleIncallSonification() low visibility, muteCount %d", muteCount);
5355                for (int i = 0; i < muteCount; i++) {
5356                    setStreamMute(stream, starting, mPrimaryOutput);
5357                }
5358            } else {
5359                ALOGV("handleIncallSonification() high visibility");
5360                if (outputDesc->device() &
5361                        getDeviceForStrategy(STRATEGY_PHONE, true /*fromCache*/)) {
5362                    ALOGV("handleIncallSonification() high visibility muted, muteCount %d", muteCount);
5363                    for (int i = 0; i < muteCount; i++) {
5364                        setStreamMute(stream, starting, mPrimaryOutput);
5365                    }
5366                }
5367                if (starting) {
5368                    mpClientInterface->startTone(AUDIO_POLICY_TONE_IN_CALL_NOTIFICATION,
5369                                                 AUDIO_STREAM_VOICE_CALL);
5370                } else {
5371                    mpClientInterface->stopTone();
5372                }
5373            }
5374        }
5375    }
5376}
5377
5378bool AudioPolicyManager::isInCall()
5379{
5380    return isStateInCall(mPhoneState);
5381}
5382
5383bool AudioPolicyManager::isStateInCall(int state) {
5384    return ((state == AUDIO_MODE_IN_CALL) ||
5385            (state == AUDIO_MODE_IN_COMMUNICATION));
5386}
5387
5388uint32_t AudioPolicyManager::getMaxEffectsCpuLoad()
5389{
5390    return MAX_EFFECTS_CPU_LOAD;
5391}
5392
5393uint32_t AudioPolicyManager::getMaxEffectsMemory()
5394{
5395    return MAX_EFFECTS_MEMORY;
5396}
5397
5398
5399// --- AudioOutputDescriptor class implementation
5400
5401AudioPolicyManager::AudioOutputDescriptor::AudioOutputDescriptor(
5402        const sp<IOProfile>& profile)
5403    : mId(0), mIoHandle(0), mLatency(0),
5404    mFlags((audio_output_flags_t)0), mDevice(AUDIO_DEVICE_NONE), mPatchHandle(0),
5405    mOutput1(0), mOutput2(0), mProfile(profile), mDirectOpenCount(0)
5406{
5407    // clear usage count for all stream types
5408    for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
5409        mRefCount[i] = 0;
5410        mCurVolume[i] = -1.0;
5411        mMuteCount[i] = 0;
5412        mStopTime[i] = 0;
5413    }
5414    for (int i = 0; i < NUM_STRATEGIES; i++) {
5415        mStrategyMutedByDevice[i] = false;
5416    }
5417    if (profile != NULL) {
5418        mFlags = (audio_output_flags_t)profile->mFlags;
5419        mSamplingRate = profile->pickSamplingRate();
5420        mFormat = profile->pickFormat();
5421        mChannelMask = profile->pickChannelMask();
5422        if (profile->mGains.size() > 0) {
5423            profile->mGains[0]->getDefaultConfig(&mGain);
5424        }
5425    }
5426}
5427
5428audio_devices_t AudioPolicyManager::AudioOutputDescriptor::device() const
5429{
5430    if (isDuplicated()) {
5431        return (audio_devices_t)(mOutput1->mDevice | mOutput2->mDevice);
5432    } else {
5433        return mDevice;
5434    }
5435}
5436
5437uint32_t AudioPolicyManager::AudioOutputDescriptor::latency()
5438{
5439    if (isDuplicated()) {
5440        return (mOutput1->mLatency > mOutput2->mLatency) ? mOutput1->mLatency : mOutput2->mLatency;
5441    } else {
5442        return mLatency;
5443    }
5444}
5445
5446bool AudioPolicyManager::AudioOutputDescriptor::sharesHwModuleWith(
5447        const sp<AudioOutputDescriptor> outputDesc)
5448{
5449    if (isDuplicated()) {
5450        return mOutput1->sharesHwModuleWith(outputDesc) || mOutput2->sharesHwModuleWith(outputDesc);
5451    } else if (outputDesc->isDuplicated()){
5452        return sharesHwModuleWith(outputDesc->mOutput1) || sharesHwModuleWith(outputDesc->mOutput2);
5453    } else {
5454        return (mProfile->mModule == outputDesc->mProfile->mModule);
5455    }
5456}
5457
5458void AudioPolicyManager::AudioOutputDescriptor::changeRefCount(audio_stream_type_t stream,
5459                                                                   int delta)
5460{
5461    // forward usage count change to attached outputs
5462    if (isDuplicated()) {
5463        mOutput1->changeRefCount(stream, delta);
5464        mOutput2->changeRefCount(stream, delta);
5465    }
5466    if ((delta + (int)mRefCount[stream]) < 0) {
5467        ALOGW("changeRefCount() invalid delta %d for stream %d, refCount %d",
5468              delta, stream, mRefCount[stream]);
5469        mRefCount[stream] = 0;
5470        return;
5471    }
5472    mRefCount[stream] += delta;
5473    ALOGV("changeRefCount() stream %d, count %d", stream, mRefCount[stream]);
5474}
5475
5476audio_devices_t AudioPolicyManager::AudioOutputDescriptor::supportedDevices()
5477{
5478    if (isDuplicated()) {
5479        return (audio_devices_t)(mOutput1->supportedDevices() | mOutput2->supportedDevices());
5480    } else {
5481        return mProfile->mSupportedDevices.types() ;
5482    }
5483}
5484
5485bool AudioPolicyManager::AudioOutputDescriptor::isActive(uint32_t inPastMs) const
5486{
5487    return isStrategyActive(NUM_STRATEGIES, inPastMs);
5488}
5489
5490bool AudioPolicyManager::AudioOutputDescriptor::isStrategyActive(routing_strategy strategy,
5491                                                                       uint32_t inPastMs,
5492                                                                       nsecs_t sysTime) const
5493{
5494    if ((sysTime == 0) && (inPastMs != 0)) {
5495        sysTime = systemTime();
5496    }
5497    for (int i = 0; i < (int)AUDIO_STREAM_CNT; i++) {
5498        if (((getStrategy((audio_stream_type_t)i) == strategy) ||
5499                (NUM_STRATEGIES == strategy)) &&
5500                isStreamActive((audio_stream_type_t)i, inPastMs, sysTime)) {
5501            return true;
5502        }
5503    }
5504    return false;
5505}
5506
5507bool AudioPolicyManager::AudioOutputDescriptor::isStreamActive(audio_stream_type_t stream,
5508                                                                       uint32_t inPastMs,
5509                                                                       nsecs_t sysTime) const
5510{
5511    if (mRefCount[stream] != 0) {
5512        return true;
5513    }
5514    if (inPastMs == 0) {
5515        return false;
5516    }
5517    if (sysTime == 0) {
5518        sysTime = systemTime();
5519    }
5520    if (ns2ms(sysTime - mStopTime[stream]) < inPastMs) {
5521        return true;
5522    }
5523    return false;
5524}
5525
5526void AudioPolicyManager::AudioOutputDescriptor::toAudioPortConfig(
5527                                                 struct audio_port_config *dstConfig,
5528                                                 const struct audio_port_config *srcConfig) const
5529{
5530    ALOG_ASSERT(!isDuplicated(), "toAudioPortConfig() called on duplicated output %d", mIoHandle);
5531
5532    dstConfig->config_mask = AUDIO_PORT_CONFIG_SAMPLE_RATE|AUDIO_PORT_CONFIG_CHANNEL_MASK|
5533                            AUDIO_PORT_CONFIG_FORMAT|AUDIO_PORT_CONFIG_GAIN;
5534    if (srcConfig != NULL) {
5535        dstConfig->config_mask |= srcConfig->config_mask;
5536    }
5537    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
5538
5539    dstConfig->id = mId;
5540    dstConfig->role = AUDIO_PORT_ROLE_SOURCE;
5541    dstConfig->type = AUDIO_PORT_TYPE_MIX;
5542    dstConfig->ext.mix.hw_module = mProfile->mModule->mHandle;
5543    dstConfig->ext.mix.handle = mIoHandle;
5544    dstConfig->ext.mix.usecase.stream = AUDIO_STREAM_DEFAULT;
5545}
5546
5547void AudioPolicyManager::AudioOutputDescriptor::toAudioPort(
5548                                                    struct audio_port *port) const
5549{
5550    ALOG_ASSERT(!isDuplicated(), "toAudioPort() called on duplicated output %d", mIoHandle);
5551    mProfile->toAudioPort(port);
5552    port->id = mId;
5553    toAudioPortConfig(&port->active_config);
5554    port->ext.mix.hw_module = mProfile->mModule->mHandle;
5555    port->ext.mix.handle = mIoHandle;
5556    port->ext.mix.latency_class =
5557            mFlags & AUDIO_OUTPUT_FLAG_FAST ? AUDIO_LATENCY_LOW : AUDIO_LATENCY_NORMAL;
5558}
5559
5560status_t AudioPolicyManager::AudioOutputDescriptor::dump(int fd)
5561{
5562    const size_t SIZE = 256;
5563    char buffer[SIZE];
5564    String8 result;
5565
5566    snprintf(buffer, SIZE, " ID: %d\n", mId);
5567    result.append(buffer);
5568    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
5569    result.append(buffer);
5570    snprintf(buffer, SIZE, " Format: %08x\n", mFormat);
5571    result.append(buffer);
5572    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
5573    result.append(buffer);
5574    snprintf(buffer, SIZE, " Latency: %d\n", mLatency);
5575    result.append(buffer);
5576    snprintf(buffer, SIZE, " Flags %08x\n", mFlags);
5577    result.append(buffer);
5578    snprintf(buffer, SIZE, " Devices %08x\n", device());
5579    result.append(buffer);
5580    snprintf(buffer, SIZE, " Stream volume refCount muteCount\n");
5581    result.append(buffer);
5582    for (int i = 0; i < (int)AUDIO_STREAM_CNT; i++) {
5583        snprintf(buffer, SIZE, " %02d     %.03f     %02d       %02d\n",
5584                 i, mCurVolume[i], mRefCount[i], mMuteCount[i]);
5585        result.append(buffer);
5586    }
5587    write(fd, result.string(), result.size());
5588
5589    return NO_ERROR;
5590}
5591
5592// --- AudioInputDescriptor class implementation
5593
5594AudioPolicyManager::AudioInputDescriptor::AudioInputDescriptor(const sp<IOProfile>& profile)
5595    : mId(0), mIoHandle(0),
5596      mDevice(AUDIO_DEVICE_NONE), mPatchHandle(0), mRefCount(0),
5597      mInputSource(AUDIO_SOURCE_DEFAULT), mProfile(profile), mIsSoundTrigger(false)
5598{
5599    if (profile != NULL) {
5600        mSamplingRate = profile->pickSamplingRate();
5601        mFormat = profile->pickFormat();
5602        mChannelMask = profile->pickChannelMask();
5603        if (profile->mGains.size() > 0) {
5604            profile->mGains[0]->getDefaultConfig(&mGain);
5605        }
5606    }
5607}
5608
5609void AudioPolicyManager::AudioInputDescriptor::toAudioPortConfig(
5610                                                   struct audio_port_config *dstConfig,
5611                                                   const struct audio_port_config *srcConfig) const
5612{
5613    ALOG_ASSERT(mProfile != 0,
5614                "toAudioPortConfig() called on input with null profile %d", mIoHandle);
5615    dstConfig->config_mask = AUDIO_PORT_CONFIG_SAMPLE_RATE|AUDIO_PORT_CONFIG_CHANNEL_MASK|
5616                            AUDIO_PORT_CONFIG_FORMAT|AUDIO_PORT_CONFIG_GAIN;
5617    if (srcConfig != NULL) {
5618        dstConfig->config_mask |= srcConfig->config_mask;
5619    }
5620
5621    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
5622
5623    dstConfig->id = mId;
5624    dstConfig->role = AUDIO_PORT_ROLE_SINK;
5625    dstConfig->type = AUDIO_PORT_TYPE_MIX;
5626    dstConfig->ext.mix.hw_module = mProfile->mModule->mHandle;
5627    dstConfig->ext.mix.handle = mIoHandle;
5628    dstConfig->ext.mix.usecase.source = mInputSource;
5629}
5630
5631void AudioPolicyManager::AudioInputDescriptor::toAudioPort(
5632                                                    struct audio_port *port) const
5633{
5634    ALOG_ASSERT(mProfile != 0, "toAudioPort() called on input with null profile %d", mIoHandle);
5635
5636    mProfile->toAudioPort(port);
5637    port->id = mId;
5638    toAudioPortConfig(&port->active_config);
5639    port->ext.mix.hw_module = mProfile->mModule->mHandle;
5640    port->ext.mix.handle = mIoHandle;
5641    port->ext.mix.latency_class = AUDIO_LATENCY_NORMAL;
5642}
5643
5644status_t AudioPolicyManager::AudioInputDescriptor::dump(int fd)
5645{
5646    const size_t SIZE = 256;
5647    char buffer[SIZE];
5648    String8 result;
5649
5650    snprintf(buffer, SIZE, " ID: %d\n", mId);
5651    result.append(buffer);
5652    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
5653    result.append(buffer);
5654    snprintf(buffer, SIZE, " Format: %d\n", mFormat);
5655    result.append(buffer);
5656    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
5657    result.append(buffer);
5658    snprintf(buffer, SIZE, " Devices %08x\n", mDevice);
5659    result.append(buffer);
5660    snprintf(buffer, SIZE, " Ref Count %d\n", mRefCount);
5661    result.append(buffer);
5662    snprintf(buffer, SIZE, " Open Ref Count %d\n", mOpenRefCount);
5663    result.append(buffer);
5664
5665    write(fd, result.string(), result.size());
5666
5667    return NO_ERROR;
5668}
5669
5670// --- StreamDescriptor class implementation
5671
5672AudioPolicyManager::StreamDescriptor::StreamDescriptor()
5673    :   mIndexMin(0), mIndexMax(1), mCanBeMuted(true)
5674{
5675    mIndexCur.add(AUDIO_DEVICE_OUT_DEFAULT, 0);
5676}
5677
5678int AudioPolicyManager::StreamDescriptor::getVolumeIndex(audio_devices_t device)
5679{
5680    device = AudioPolicyManager::getDeviceForVolume(device);
5681    // there is always a valid entry for AUDIO_DEVICE_OUT_DEFAULT
5682    if (mIndexCur.indexOfKey(device) < 0) {
5683        device = AUDIO_DEVICE_OUT_DEFAULT;
5684    }
5685    return mIndexCur.valueFor(device);
5686}
5687
5688void AudioPolicyManager::StreamDescriptor::dump(int fd)
5689{
5690    const size_t SIZE = 256;
5691    char buffer[SIZE];
5692    String8 result;
5693
5694    snprintf(buffer, SIZE, "%s         %02d         %02d         ",
5695             mCanBeMuted ? "true " : "false", mIndexMin, mIndexMax);
5696    result.append(buffer);
5697    for (size_t i = 0; i < mIndexCur.size(); i++) {
5698        snprintf(buffer, SIZE, "%04x : %02d, ",
5699                 mIndexCur.keyAt(i),
5700                 mIndexCur.valueAt(i));
5701        result.append(buffer);
5702    }
5703    result.append("\n");
5704
5705    write(fd, result.string(), result.size());
5706}
5707
5708// --- EffectDescriptor class implementation
5709
5710status_t AudioPolicyManager::EffectDescriptor::dump(int fd)
5711{
5712    const size_t SIZE = 256;
5713    char buffer[SIZE];
5714    String8 result;
5715
5716    snprintf(buffer, SIZE, " I/O: %d\n", mIo);
5717    result.append(buffer);
5718    snprintf(buffer, SIZE, " Strategy: %d\n", mStrategy);
5719    result.append(buffer);
5720    snprintf(buffer, SIZE, " Session: %d\n", mSession);
5721    result.append(buffer);
5722    snprintf(buffer, SIZE, " Name: %s\n",  mDesc.name);
5723    result.append(buffer);
5724    snprintf(buffer, SIZE, " %s\n",  mEnabled ? "Enabled" : "Disabled");
5725    result.append(buffer);
5726    write(fd, result.string(), result.size());
5727
5728    return NO_ERROR;
5729}
5730
5731// --- HwModule class implementation
5732
5733AudioPolicyManager::HwModule::HwModule(const char *name)
5734    : mName(strndup(name, AUDIO_HARDWARE_MODULE_ID_MAX_LEN)),
5735      mHalVersion(AUDIO_DEVICE_API_VERSION_MIN), mHandle(0)
5736{
5737}
5738
5739AudioPolicyManager::HwModule::~HwModule()
5740{
5741    for (size_t i = 0; i < mOutputProfiles.size(); i++) {
5742        mOutputProfiles[i]->mSupportedDevices.clear();
5743    }
5744    for (size_t i = 0; i < mInputProfiles.size(); i++) {
5745        mInputProfiles[i]->mSupportedDevices.clear();
5746    }
5747    free((void *)mName);
5748}
5749
5750status_t AudioPolicyManager::HwModule::loadInput(cnode *root)
5751{
5752    cnode *node = root->first_child;
5753
5754    sp<IOProfile> profile = new IOProfile(String8(root->name), AUDIO_PORT_ROLE_SINK, this);
5755
5756    while (node) {
5757        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
5758            profile->loadSamplingRates((char *)node->value);
5759        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
5760            profile->loadFormats((char *)node->value);
5761        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
5762            profile->loadInChannels((char *)node->value);
5763        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
5764            profile->mSupportedDevices.loadDevicesFromName((char *)node->value,
5765                                                           mDeclaredDevices);
5766        } else if (strcmp(node->name, FLAGS_TAG) == 0) {
5767            profile->mFlags = parseInputFlagNames((char *)node->value);
5768        } else if (strcmp(node->name, GAINS_TAG) == 0) {
5769            profile->loadGains(node);
5770        }
5771        node = node->next;
5772    }
5773    ALOGW_IF(profile->mSupportedDevices.isEmpty(),
5774            "loadInput() invalid supported devices");
5775    ALOGW_IF(profile->mChannelMasks.size() == 0,
5776            "loadInput() invalid supported channel masks");
5777    ALOGW_IF(profile->mSamplingRates.size() == 0,
5778            "loadInput() invalid supported sampling rates");
5779    ALOGW_IF(profile->mFormats.size() == 0,
5780            "loadInput() invalid supported formats");
5781    if (!profile->mSupportedDevices.isEmpty() &&
5782            (profile->mChannelMasks.size() != 0) &&
5783            (profile->mSamplingRates.size() != 0) &&
5784            (profile->mFormats.size() != 0)) {
5785
5786        ALOGV("loadInput() adding input Supported Devices %04x",
5787              profile->mSupportedDevices.types());
5788
5789        mInputProfiles.add(profile);
5790        return NO_ERROR;
5791    } else {
5792        return BAD_VALUE;
5793    }
5794}
5795
5796status_t AudioPolicyManager::HwModule::loadOutput(cnode *root)
5797{
5798    cnode *node = root->first_child;
5799
5800    sp<IOProfile> profile = new IOProfile(String8(root->name), AUDIO_PORT_ROLE_SOURCE, this);
5801
5802    while (node) {
5803        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
5804            profile->loadSamplingRates((char *)node->value);
5805        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
5806            profile->loadFormats((char *)node->value);
5807        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
5808            profile->loadOutChannels((char *)node->value);
5809        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
5810            profile->mSupportedDevices.loadDevicesFromName((char *)node->value,
5811                                                           mDeclaredDevices);
5812        } else if (strcmp(node->name, FLAGS_TAG) == 0) {
5813            profile->mFlags = parseOutputFlagNames((char *)node->value);
5814        } else if (strcmp(node->name, GAINS_TAG) == 0) {
5815            profile->loadGains(node);
5816        }
5817        node = node->next;
5818    }
5819    ALOGW_IF(profile->mSupportedDevices.isEmpty(),
5820            "loadOutput() invalid supported devices");
5821    ALOGW_IF(profile->mChannelMasks.size() == 0,
5822            "loadOutput() invalid supported channel masks");
5823    ALOGW_IF(profile->mSamplingRates.size() == 0,
5824            "loadOutput() invalid supported sampling rates");
5825    ALOGW_IF(profile->mFormats.size() == 0,
5826            "loadOutput() invalid supported formats");
5827    if (!profile->mSupportedDevices.isEmpty() &&
5828            (profile->mChannelMasks.size() != 0) &&
5829            (profile->mSamplingRates.size() != 0) &&
5830            (profile->mFormats.size() != 0)) {
5831
5832        ALOGV("loadOutput() adding output Supported Devices %04x, mFlags %04x",
5833              profile->mSupportedDevices.types(), profile->mFlags);
5834
5835        mOutputProfiles.add(profile);
5836        return NO_ERROR;
5837    } else {
5838        return BAD_VALUE;
5839    }
5840}
5841
5842status_t AudioPolicyManager::HwModule::loadDevice(cnode *root)
5843{
5844    cnode *node = root->first_child;
5845
5846    audio_devices_t type = AUDIO_DEVICE_NONE;
5847    while (node) {
5848        if (strcmp(node->name, DEVICE_TYPE) == 0) {
5849            type = parseDeviceNames((char *)node->value);
5850            break;
5851        }
5852        node = node->next;
5853    }
5854    if (type == AUDIO_DEVICE_NONE ||
5855            (!audio_is_input_device(type) && !audio_is_output_device(type))) {
5856        ALOGW("loadDevice() bad type %08x", type);
5857        return BAD_VALUE;
5858    }
5859    sp<DeviceDescriptor> deviceDesc = new DeviceDescriptor(String8(root->name), type);
5860    deviceDesc->mModule = this;
5861
5862    node = root->first_child;
5863    while (node) {
5864        if (strcmp(node->name, DEVICE_ADDRESS) == 0) {
5865            deviceDesc->mAddress = String8((char *)node->value);
5866        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
5867            if (audio_is_input_device(type)) {
5868                deviceDesc->loadInChannels((char *)node->value);
5869            } else {
5870                deviceDesc->loadOutChannels((char *)node->value);
5871            }
5872        } else if (strcmp(node->name, GAINS_TAG) == 0) {
5873            deviceDesc->loadGains(node);
5874        }
5875        node = node->next;
5876    }
5877
5878    ALOGV("loadDevice() adding device name %s type %08x address %s",
5879          deviceDesc->mName.string(), type, deviceDesc->mAddress.string());
5880
5881    mDeclaredDevices.add(deviceDesc);
5882
5883    return NO_ERROR;
5884}
5885
5886void AudioPolicyManager::HwModule::dump(int fd)
5887{
5888    const size_t SIZE = 256;
5889    char buffer[SIZE];
5890    String8 result;
5891
5892    snprintf(buffer, SIZE, "  - name: %s\n", mName);
5893    result.append(buffer);
5894    snprintf(buffer, SIZE, "  - handle: %d\n", mHandle);
5895    result.append(buffer);
5896    snprintf(buffer, SIZE, "  - version: %u.%u\n", mHalVersion >> 8, mHalVersion & 0xFF);
5897    result.append(buffer);
5898    write(fd, result.string(), result.size());
5899    if (mOutputProfiles.size()) {
5900        write(fd, "  - outputs:\n", strlen("  - outputs:\n"));
5901        for (size_t i = 0; i < mOutputProfiles.size(); i++) {
5902            snprintf(buffer, SIZE, "    output %zu:\n", i);
5903            write(fd, buffer, strlen(buffer));
5904            mOutputProfiles[i]->dump(fd);
5905        }
5906    }
5907    if (mInputProfiles.size()) {
5908        write(fd, "  - inputs:\n", strlen("  - inputs:\n"));
5909        for (size_t i = 0; i < mInputProfiles.size(); i++) {
5910            snprintf(buffer, SIZE, "    input %zu:\n", i);
5911            write(fd, buffer, strlen(buffer));
5912            mInputProfiles[i]->dump(fd);
5913        }
5914    }
5915    if (mDeclaredDevices.size()) {
5916        write(fd, "  - devices:\n", strlen("  - devices:\n"));
5917        for (size_t i = 0; i < mDeclaredDevices.size(); i++) {
5918            mDeclaredDevices[i]->dump(fd, 4, i);
5919        }
5920    }
5921}
5922
5923// --- AudioPort class implementation
5924
5925
5926AudioPolicyManager::AudioPort::AudioPort(const String8& name, audio_port_type_t type,
5927          audio_port_role_t role, const sp<HwModule>& module) :
5928    mName(name), mType(type), mRole(role), mModule(module), mFlags(0)
5929{
5930    mUseInChannelMask = ((type == AUDIO_PORT_TYPE_DEVICE) && (role == AUDIO_PORT_ROLE_SOURCE)) ||
5931                    ((type == AUDIO_PORT_TYPE_MIX) && (role == AUDIO_PORT_ROLE_SINK));
5932}
5933
5934void AudioPolicyManager::AudioPort::toAudioPort(struct audio_port *port) const
5935{
5936    port->role = mRole;
5937    port->type = mType;
5938    unsigned int i;
5939    for (i = 0; i < mSamplingRates.size() && i < AUDIO_PORT_MAX_SAMPLING_RATES; i++) {
5940        if (mSamplingRates[i] != 0) {
5941            port->sample_rates[i] = mSamplingRates[i];
5942        }
5943    }
5944    port->num_sample_rates = i;
5945    for (i = 0; i < mChannelMasks.size() && i < AUDIO_PORT_MAX_CHANNEL_MASKS; i++) {
5946        if (mChannelMasks[i] != 0) {
5947            port->channel_masks[i] = mChannelMasks[i];
5948        }
5949    }
5950    port->num_channel_masks = i;
5951    for (i = 0; i < mFormats.size() && i < AUDIO_PORT_MAX_FORMATS; i++) {
5952        if (mFormats[i] != 0) {
5953            port->formats[i] = mFormats[i];
5954        }
5955    }
5956    port->num_formats = i;
5957
5958    ALOGV("AudioPort::toAudioPort() num gains %zu", mGains.size());
5959
5960    for (i = 0; i < mGains.size() && i < AUDIO_PORT_MAX_GAINS; i++) {
5961        port->gains[i] = mGains[i]->mGain;
5962    }
5963    port->num_gains = i;
5964}
5965
5966void AudioPolicyManager::AudioPort::importAudioPort(const sp<AudioPort> port) {
5967    for (size_t k = 0 ; k < port->mSamplingRates.size() ; k++) {
5968        const uint32_t rate = port->mSamplingRates.itemAt(k);
5969        if (rate != 0) { // skip "dynamic" rates
5970            bool hasRate = false;
5971            for (size_t l = 0 ; l < mSamplingRates.size() ; l++) {
5972                if (rate == mSamplingRates.itemAt(l)) {
5973                    hasRate = true;
5974                    break;
5975                }
5976            }
5977            if (!hasRate) { // never import a sampling rate twice
5978                mSamplingRates.add(rate);
5979            }
5980        }
5981    }
5982    for (size_t k = 0 ; k < port->mChannelMasks.size() ; k++) {
5983        const audio_channel_mask_t mask = port->mChannelMasks.itemAt(k);
5984        if (mask != 0) { // skip "dynamic" masks
5985            bool hasMask = false;
5986            for (size_t l = 0 ; l < mChannelMasks.size() ; l++) {
5987                if (mask == mChannelMasks.itemAt(l)) {
5988                    hasMask = true;
5989                    break;
5990                }
5991            }
5992            if (!hasMask) { // never import a channel mask twice
5993                mChannelMasks.add(mask);
5994            }
5995        }
5996    }
5997    for (size_t k = 0 ; k < port->mFormats.size() ; k++) {
5998        const audio_format_t format = port->mFormats.itemAt(k);
5999        if (format != 0) { // skip "dynamic" formats
6000            bool hasFormat = false;
6001            for (size_t l = 0 ; l < mFormats.size() ; l++) {
6002                if (format == mFormats.itemAt(l)) {
6003                    hasFormat = true;
6004                    break;
6005                }
6006            }
6007            if (!hasFormat) { // never import a channel mask twice
6008                mFormats.add(format);
6009            }
6010        }
6011    }
6012    for (size_t k = 0 ; k < port->mGains.size() ; k++) {
6013        sp<AudioGain> gain = port->mGains.itemAt(k);
6014        if (gain != 0) {
6015            bool hasGain = false;
6016            for (size_t l = 0 ; l < mGains.size() ; l++) {
6017                if (gain == mGains.itemAt(l)) {
6018                    hasGain = true;
6019                    break;
6020                }
6021            }
6022            if (!hasGain) { // never import a gain twice
6023                mGains.add(gain);
6024            }
6025        }
6026    }
6027}
6028
6029void AudioPolicyManager::AudioPort::clearCapabilities() {
6030    mChannelMasks.clear();
6031    mFormats.clear();
6032    mSamplingRates.clear();
6033    mGains.clear();
6034}
6035
6036void AudioPolicyManager::AudioPort::loadSamplingRates(char *name)
6037{
6038    char *str = strtok(name, "|");
6039
6040    // by convention, "0' in the first entry in mSamplingRates indicates the supported sampling
6041    // rates should be read from the output stream after it is opened for the first time
6042    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
6043        mSamplingRates.add(0);
6044        return;
6045    }
6046
6047    while (str != NULL) {
6048        uint32_t rate = atoi(str);
6049        if (rate != 0) {
6050            ALOGV("loadSamplingRates() adding rate %d", rate);
6051            mSamplingRates.add(rate);
6052        }
6053        str = strtok(NULL, "|");
6054    }
6055}
6056
6057void AudioPolicyManager::AudioPort::loadFormats(char *name)
6058{
6059    char *str = strtok(name, "|");
6060
6061    // by convention, "0' in the first entry in mFormats indicates the supported formats
6062    // should be read from the output stream after it is opened for the first time
6063    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
6064        mFormats.add(AUDIO_FORMAT_DEFAULT);
6065        return;
6066    }
6067
6068    while (str != NULL) {
6069        audio_format_t format = (audio_format_t)stringToEnum(sFormatNameToEnumTable,
6070                                                             ARRAY_SIZE(sFormatNameToEnumTable),
6071                                                             str);
6072        if (format != AUDIO_FORMAT_DEFAULT) {
6073            mFormats.add(format);
6074        }
6075        str = strtok(NULL, "|");
6076    }
6077}
6078
6079void AudioPolicyManager::AudioPort::loadInChannels(char *name)
6080{
6081    const char *str = strtok(name, "|");
6082
6083    ALOGV("loadInChannels() %s", name);
6084
6085    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
6086        mChannelMasks.add(0);
6087        return;
6088    }
6089
6090    while (str != NULL) {
6091        audio_channel_mask_t channelMask =
6092                (audio_channel_mask_t)stringToEnum(sInChannelsNameToEnumTable,
6093                                                   ARRAY_SIZE(sInChannelsNameToEnumTable),
6094                                                   str);
6095        if (channelMask != 0) {
6096            ALOGV("loadInChannels() adding channelMask %04x", channelMask);
6097            mChannelMasks.add(channelMask);
6098        }
6099        str = strtok(NULL, "|");
6100    }
6101}
6102
6103void AudioPolicyManager::AudioPort::loadOutChannels(char *name)
6104{
6105    const char *str = strtok(name, "|");
6106
6107    ALOGV("loadOutChannels() %s", name);
6108
6109    // by convention, "0' in the first entry in mChannelMasks indicates the supported channel
6110    // masks should be read from the output stream after it is opened for the first time
6111    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
6112        mChannelMasks.add(0);
6113        return;
6114    }
6115
6116    while (str != NULL) {
6117        audio_channel_mask_t channelMask =
6118                (audio_channel_mask_t)stringToEnum(sOutChannelsNameToEnumTable,
6119                                                   ARRAY_SIZE(sOutChannelsNameToEnumTable),
6120                                                   str);
6121        if (channelMask != 0) {
6122            mChannelMasks.add(channelMask);
6123        }
6124        str = strtok(NULL, "|");
6125    }
6126    return;
6127}
6128
6129audio_gain_mode_t AudioPolicyManager::AudioPort::loadGainMode(char *name)
6130{
6131    const char *str = strtok(name, "|");
6132
6133    ALOGV("loadGainMode() %s", name);
6134    audio_gain_mode_t mode = 0;
6135    while (str != NULL) {
6136        mode |= (audio_gain_mode_t)stringToEnum(sGainModeNameToEnumTable,
6137                                                ARRAY_SIZE(sGainModeNameToEnumTable),
6138                                                str);
6139        str = strtok(NULL, "|");
6140    }
6141    return mode;
6142}
6143
6144void AudioPolicyManager::AudioPort::loadGain(cnode *root, int index)
6145{
6146    cnode *node = root->first_child;
6147
6148    sp<AudioGain> gain = new AudioGain(index, mUseInChannelMask);
6149
6150    while (node) {
6151        if (strcmp(node->name, GAIN_MODE) == 0) {
6152            gain->mGain.mode = loadGainMode((char *)node->value);
6153        } else if (strcmp(node->name, GAIN_CHANNELS) == 0) {
6154            if (mUseInChannelMask) {
6155                gain->mGain.channel_mask =
6156                        (audio_channel_mask_t)stringToEnum(sInChannelsNameToEnumTable,
6157                                                           ARRAY_SIZE(sInChannelsNameToEnumTable),
6158                                                           (char *)node->value);
6159            } else {
6160                gain->mGain.channel_mask =
6161                        (audio_channel_mask_t)stringToEnum(sOutChannelsNameToEnumTable,
6162                                                           ARRAY_SIZE(sOutChannelsNameToEnumTable),
6163                                                           (char *)node->value);
6164            }
6165        } else if (strcmp(node->name, GAIN_MIN_VALUE) == 0) {
6166            gain->mGain.min_value = atoi((char *)node->value);
6167        } else if (strcmp(node->name, GAIN_MAX_VALUE) == 0) {
6168            gain->mGain.max_value = atoi((char *)node->value);
6169        } else if (strcmp(node->name, GAIN_DEFAULT_VALUE) == 0) {
6170            gain->mGain.default_value = atoi((char *)node->value);
6171        } else if (strcmp(node->name, GAIN_STEP_VALUE) == 0) {
6172            gain->mGain.step_value = atoi((char *)node->value);
6173        } else if (strcmp(node->name, GAIN_MIN_RAMP_MS) == 0) {
6174            gain->mGain.min_ramp_ms = atoi((char *)node->value);
6175        } else if (strcmp(node->name, GAIN_MAX_RAMP_MS) == 0) {
6176            gain->mGain.max_ramp_ms = atoi((char *)node->value);
6177        }
6178        node = node->next;
6179    }
6180
6181    ALOGV("loadGain() adding new gain mode %08x channel mask %08x min mB %d max mB %d",
6182          gain->mGain.mode, gain->mGain.channel_mask, gain->mGain.min_value, gain->mGain.max_value);
6183
6184    if (gain->mGain.mode == 0) {
6185        return;
6186    }
6187    mGains.add(gain);
6188}
6189
6190void AudioPolicyManager::AudioPort::loadGains(cnode *root)
6191{
6192    cnode *node = root->first_child;
6193    int index = 0;
6194    while (node) {
6195        ALOGV("loadGains() loading gain %s", node->name);
6196        loadGain(node, index++);
6197        node = node->next;
6198    }
6199}
6200
6201status_t AudioPolicyManager::AudioPort::checkExactSamplingRate(uint32_t samplingRate) const
6202{
6203    for (size_t i = 0; i < mSamplingRates.size(); i ++) {
6204        if (mSamplingRates[i] == samplingRate) {
6205            return NO_ERROR;
6206        }
6207    }
6208    return BAD_VALUE;
6209}
6210
6211status_t AudioPolicyManager::AudioPort::checkCompatibleSamplingRate(uint32_t samplingRate,
6212        uint32_t *updatedSamplingRate) const
6213{
6214    // Search for the closest supported sampling rate that is above (preferred)
6215    // or below (acceptable) the desired sampling rate, within a permitted ratio.
6216    // The sampling rates do not need to be sorted in ascending order.
6217    ssize_t maxBelow = -1;
6218    ssize_t minAbove = -1;
6219    uint32_t candidate;
6220    for (size_t i = 0; i < mSamplingRates.size(); i++) {
6221        candidate = mSamplingRates[i];
6222        if (candidate == samplingRate) {
6223            if (updatedSamplingRate != NULL) {
6224                *updatedSamplingRate = candidate;
6225            }
6226            return NO_ERROR;
6227        }
6228        // candidate < desired
6229        if (candidate < samplingRate) {
6230            if (maxBelow < 0 || candidate > mSamplingRates[maxBelow]) {
6231                maxBelow = i;
6232            }
6233        // candidate > desired
6234        } else {
6235            if (minAbove < 0 || candidate < mSamplingRates[minAbove]) {
6236                minAbove = i;
6237            }
6238        }
6239    }
6240    // This uses hard-coded knowledge about AudioFlinger resampling ratios.
6241    // TODO Move these assumptions out.
6242    static const uint32_t kMaxDownSampleRatio = 6;  // beyond this aliasing occurs
6243    static const uint32_t kMaxUpSampleRatio = 256;  // beyond this sample rate inaccuracies occur
6244                                                    // due to approximation by an int32_t of the
6245                                                    // phase increments
6246    // Prefer to down-sample from a higher sampling rate, as we get the desired frequency spectrum.
6247    if (minAbove >= 0) {
6248        candidate = mSamplingRates[minAbove];
6249        if (candidate / kMaxDownSampleRatio <= samplingRate) {
6250            if (updatedSamplingRate != NULL) {
6251                *updatedSamplingRate = candidate;
6252            }
6253            return NO_ERROR;
6254        }
6255    }
6256    // But if we have to up-sample from a lower sampling rate, that's OK.
6257    if (maxBelow >= 0) {
6258        candidate = mSamplingRates[maxBelow];
6259        if (candidate * kMaxUpSampleRatio >= samplingRate) {
6260            if (updatedSamplingRate != NULL) {
6261                *updatedSamplingRate = candidate;
6262            }
6263            return NO_ERROR;
6264        }
6265    }
6266    // leave updatedSamplingRate unmodified
6267    return BAD_VALUE;
6268}
6269
6270status_t AudioPolicyManager::AudioPort::checkExactChannelMask(audio_channel_mask_t channelMask) const
6271{
6272    for (size_t i = 0; i < mChannelMasks.size(); i++) {
6273        if (mChannelMasks[i] == channelMask) {
6274            return NO_ERROR;
6275        }
6276    }
6277    return BAD_VALUE;
6278}
6279
6280status_t AudioPolicyManager::AudioPort::checkCompatibleChannelMask(audio_channel_mask_t channelMask)
6281        const
6282{
6283    const bool isRecordThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SINK;
6284    for (size_t i = 0; i < mChannelMasks.size(); i ++) {
6285        // FIXME Does not handle multi-channel automatic conversions yet
6286        audio_channel_mask_t supported = mChannelMasks[i];
6287        if (supported == channelMask) {
6288            return NO_ERROR;
6289        }
6290        if (isRecordThread) {
6291            // This uses hard-coded knowledge that AudioFlinger can silently down-mix and up-mix.
6292            // FIXME Abstract this out to a table.
6293            if (((supported == AUDIO_CHANNEL_IN_FRONT_BACK || supported == AUDIO_CHANNEL_IN_STEREO)
6294                    && channelMask == AUDIO_CHANNEL_IN_MONO) ||
6295                (supported == AUDIO_CHANNEL_IN_MONO && (channelMask == AUDIO_CHANNEL_IN_FRONT_BACK
6296                    || channelMask == AUDIO_CHANNEL_IN_STEREO))) {
6297                return NO_ERROR;
6298            }
6299        }
6300    }
6301    return BAD_VALUE;
6302}
6303
6304status_t AudioPolicyManager::AudioPort::checkFormat(audio_format_t format) const
6305{
6306    for (size_t i = 0; i < mFormats.size(); i ++) {
6307        if (mFormats[i] == format) {
6308            return NO_ERROR;
6309        }
6310    }
6311    return BAD_VALUE;
6312}
6313
6314
6315uint32_t AudioPolicyManager::AudioPort::pickSamplingRate() const
6316{
6317    // special case for uninitialized dynamic profile
6318    if (mSamplingRates.size() == 1 && mSamplingRates[0] == 0) {
6319        return 0;
6320    }
6321
6322    // For direct outputs, pick minimum sampling rate: this helps ensuring that the
6323    // channel count / sampling rate combination chosen will be supported by the connected
6324    // sink
6325    if ((mType == AUDIO_PORT_TYPE_MIX) && (mRole == AUDIO_PORT_ROLE_SOURCE) &&
6326            (mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD))) {
6327        uint32_t samplingRate = UINT_MAX;
6328        for (size_t i = 0; i < mSamplingRates.size(); i ++) {
6329            if ((mSamplingRates[i] < samplingRate) && (mSamplingRates[i] > 0)) {
6330                samplingRate = mSamplingRates[i];
6331            }
6332        }
6333        return (samplingRate == UINT_MAX) ? 0 : samplingRate;
6334    }
6335
6336    uint32_t samplingRate = 0;
6337    uint32_t maxRate = MAX_MIXER_SAMPLING_RATE;
6338
6339    // For mixed output and inputs, use max mixer sampling rates. Do not
6340    // limit sampling rate otherwise
6341    if (mType != AUDIO_PORT_TYPE_MIX) {
6342        maxRate = UINT_MAX;
6343    }
6344    for (size_t i = 0; i < mSamplingRates.size(); i ++) {
6345        if ((mSamplingRates[i] > samplingRate) && (mSamplingRates[i] <= maxRate)) {
6346            samplingRate = mSamplingRates[i];
6347        }
6348    }
6349    return samplingRate;
6350}
6351
6352audio_channel_mask_t AudioPolicyManager::AudioPort::pickChannelMask() const
6353{
6354    // special case for uninitialized dynamic profile
6355    if (mChannelMasks.size() == 1 && mChannelMasks[0] == 0) {
6356        return AUDIO_CHANNEL_NONE;
6357    }
6358    audio_channel_mask_t channelMask = AUDIO_CHANNEL_NONE;
6359
6360    // For direct outputs, pick minimum channel count: this helps ensuring that the
6361    // channel count / sampling rate combination chosen will be supported by the connected
6362    // sink
6363    if ((mType == AUDIO_PORT_TYPE_MIX) && (mRole == AUDIO_PORT_ROLE_SOURCE) &&
6364            (mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD))) {
6365        uint32_t channelCount = UINT_MAX;
6366        for (size_t i = 0; i < mChannelMasks.size(); i ++) {
6367            uint32_t cnlCount;
6368            if (mUseInChannelMask) {
6369                cnlCount = audio_channel_count_from_in_mask(mChannelMasks[i]);
6370            } else {
6371                cnlCount = audio_channel_count_from_out_mask(mChannelMasks[i]);
6372            }
6373            if ((cnlCount < channelCount) && (cnlCount > 0)) {
6374                channelMask = mChannelMasks[i];
6375                channelCount = cnlCount;
6376            }
6377        }
6378        return channelMask;
6379    }
6380
6381    uint32_t channelCount = 0;
6382    uint32_t maxCount = MAX_MIXER_CHANNEL_COUNT;
6383
6384    // For mixed output and inputs, use max mixer channel count. Do not
6385    // limit channel count otherwise
6386    if (mType != AUDIO_PORT_TYPE_MIX) {
6387        maxCount = UINT_MAX;
6388    }
6389    for (size_t i = 0; i < mChannelMasks.size(); i ++) {
6390        uint32_t cnlCount;
6391        if (mUseInChannelMask) {
6392            cnlCount = audio_channel_count_from_in_mask(mChannelMasks[i]);
6393        } else {
6394            cnlCount = audio_channel_count_from_out_mask(mChannelMasks[i]);
6395        }
6396        if ((cnlCount > channelCount) && (cnlCount <= maxCount)) {
6397            channelMask = mChannelMasks[i];
6398            channelCount = cnlCount;
6399        }
6400    }
6401    return channelMask;
6402}
6403
6404/* format in order of increasing preference */
6405const audio_format_t AudioPolicyManager::AudioPort::sPcmFormatCompareTable[] = {
6406        AUDIO_FORMAT_DEFAULT,
6407        AUDIO_FORMAT_PCM_16_BIT,
6408        AUDIO_FORMAT_PCM_8_24_BIT,
6409        AUDIO_FORMAT_PCM_24_BIT_PACKED,
6410        AUDIO_FORMAT_PCM_32_BIT,
6411        AUDIO_FORMAT_PCM_FLOAT,
6412};
6413
6414int AudioPolicyManager::AudioPort::compareFormats(audio_format_t format1,
6415                                                  audio_format_t format2)
6416{
6417    // NOTE: AUDIO_FORMAT_INVALID is also considered not PCM and will be compared equal to any
6418    // compressed format and better than any PCM format. This is by design of pickFormat()
6419    if (!audio_is_linear_pcm(format1)) {
6420        if (!audio_is_linear_pcm(format2)) {
6421            return 0;
6422        }
6423        return 1;
6424    }
6425    if (!audio_is_linear_pcm(format2)) {
6426        return -1;
6427    }
6428
6429    int index1 = -1, index2 = -1;
6430    for (size_t i = 0;
6431            (i < ARRAY_SIZE(sPcmFormatCompareTable)) && ((index1 == -1) || (index2 == -1));
6432            i ++) {
6433        if (sPcmFormatCompareTable[i] == format1) {
6434            index1 = i;
6435        }
6436        if (sPcmFormatCompareTable[i] == format2) {
6437            index2 = i;
6438        }
6439    }
6440    // format1 not found => index1 < 0 => format2 > format1
6441    // format2 not found => index2 < 0 => format2 < format1
6442    return index1 - index2;
6443}
6444
6445audio_format_t AudioPolicyManager::AudioPort::pickFormat() const
6446{
6447    // special case for uninitialized dynamic profile
6448    if (mFormats.size() == 1 && mFormats[0] == 0) {
6449        return AUDIO_FORMAT_DEFAULT;
6450    }
6451
6452    audio_format_t format = AUDIO_FORMAT_DEFAULT;
6453    audio_format_t bestFormat =
6454            AudioPolicyManager::AudioPort::sPcmFormatCompareTable[
6455                ARRAY_SIZE(AudioPolicyManager::AudioPort::sPcmFormatCompareTable) - 1];
6456    // For mixed output and inputs, use best mixer output format. Do not
6457    // limit format otherwise
6458    if ((mType != AUDIO_PORT_TYPE_MIX) ||
6459            ((mRole == AUDIO_PORT_ROLE_SOURCE) &&
6460             (((mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD)) != 0)))) {
6461        bestFormat = AUDIO_FORMAT_INVALID;
6462    }
6463
6464    for (size_t i = 0; i < mFormats.size(); i ++) {
6465        if ((compareFormats(mFormats[i], format) > 0) &&
6466                (compareFormats(mFormats[i], bestFormat) <= 0)) {
6467            format = mFormats[i];
6468        }
6469    }
6470    return format;
6471}
6472
6473status_t AudioPolicyManager::AudioPort::checkGain(const struct audio_gain_config *gainConfig,
6474                                                  int index) const
6475{
6476    if (index < 0 || (size_t)index >= mGains.size()) {
6477        return BAD_VALUE;
6478    }
6479    return mGains[index]->checkConfig(gainConfig);
6480}
6481
6482void AudioPolicyManager::AudioPort::dump(int fd, int spaces) const
6483{
6484    const size_t SIZE = 256;
6485    char buffer[SIZE];
6486    String8 result;
6487
6488    if (mName.size() != 0) {
6489        snprintf(buffer, SIZE, "%*s- name: %s\n", spaces, "", mName.string());
6490        result.append(buffer);
6491    }
6492
6493    if (mSamplingRates.size() != 0) {
6494        snprintf(buffer, SIZE, "%*s- sampling rates: ", spaces, "");
6495        result.append(buffer);
6496        for (size_t i = 0; i < mSamplingRates.size(); i++) {
6497            if (i == 0 && mSamplingRates[i] == 0) {
6498                snprintf(buffer, SIZE, "Dynamic");
6499            } else {
6500                snprintf(buffer, SIZE, "%d", mSamplingRates[i]);
6501            }
6502            result.append(buffer);
6503            result.append(i == (mSamplingRates.size() - 1) ? "" : ", ");
6504        }
6505        result.append("\n");
6506    }
6507
6508    if (mChannelMasks.size() != 0) {
6509        snprintf(buffer, SIZE, "%*s- channel masks: ", spaces, "");
6510        result.append(buffer);
6511        for (size_t i = 0; i < mChannelMasks.size(); i++) {
6512            ALOGV("AudioPort::dump mChannelMasks %zu %08x", i, mChannelMasks[i]);
6513
6514            if (i == 0 && mChannelMasks[i] == 0) {
6515                snprintf(buffer, SIZE, "Dynamic");
6516            } else {
6517                snprintf(buffer, SIZE, "0x%04x", mChannelMasks[i]);
6518            }
6519            result.append(buffer);
6520            result.append(i == (mChannelMasks.size() - 1) ? "" : ", ");
6521        }
6522        result.append("\n");
6523    }
6524
6525    if (mFormats.size() != 0) {
6526        snprintf(buffer, SIZE, "%*s- formats: ", spaces, "");
6527        result.append(buffer);
6528        for (size_t i = 0; i < mFormats.size(); i++) {
6529            const char *formatStr = enumToString(sFormatNameToEnumTable,
6530                                                 ARRAY_SIZE(sFormatNameToEnumTable),
6531                                                 mFormats[i]);
6532            if (i == 0 && strcmp(formatStr, "") == 0) {
6533                snprintf(buffer, SIZE, "Dynamic");
6534            } else {
6535                snprintf(buffer, SIZE, "%s", formatStr);
6536            }
6537            result.append(buffer);
6538            result.append(i == (mFormats.size() - 1) ? "" : ", ");
6539        }
6540        result.append("\n");
6541    }
6542    write(fd, result.string(), result.size());
6543    if (mGains.size() != 0) {
6544        snprintf(buffer, SIZE, "%*s- gains:\n", spaces, "");
6545        write(fd, buffer, strlen(buffer) + 1);
6546        result.append(buffer);
6547        for (size_t i = 0; i < mGains.size(); i++) {
6548            mGains[i]->dump(fd, spaces + 2, i);
6549        }
6550    }
6551}
6552
6553// --- AudioGain class implementation
6554
6555AudioPolicyManager::AudioGain::AudioGain(int index, bool useInChannelMask)
6556{
6557    mIndex = index;
6558    mUseInChannelMask = useInChannelMask;
6559    memset(&mGain, 0, sizeof(struct audio_gain));
6560}
6561
6562void AudioPolicyManager::AudioGain::getDefaultConfig(struct audio_gain_config *config)
6563{
6564    config->index = mIndex;
6565    config->mode = mGain.mode;
6566    config->channel_mask = mGain.channel_mask;
6567    if ((mGain.mode & AUDIO_GAIN_MODE_JOINT) == AUDIO_GAIN_MODE_JOINT) {
6568        config->values[0] = mGain.default_value;
6569    } else {
6570        uint32_t numValues;
6571        if (mUseInChannelMask) {
6572            numValues = audio_channel_count_from_in_mask(mGain.channel_mask);
6573        } else {
6574            numValues = audio_channel_count_from_out_mask(mGain.channel_mask);
6575        }
6576        for (size_t i = 0; i < numValues; i++) {
6577            config->values[i] = mGain.default_value;
6578        }
6579    }
6580    if ((mGain.mode & AUDIO_GAIN_MODE_RAMP) == AUDIO_GAIN_MODE_RAMP) {
6581        config->ramp_duration_ms = mGain.min_ramp_ms;
6582    }
6583}
6584
6585status_t AudioPolicyManager::AudioGain::checkConfig(const struct audio_gain_config *config)
6586{
6587    if ((config->mode & ~mGain.mode) != 0) {
6588        return BAD_VALUE;
6589    }
6590    if ((config->mode & AUDIO_GAIN_MODE_JOINT) == AUDIO_GAIN_MODE_JOINT) {
6591        if ((config->values[0] < mGain.min_value) ||
6592                    (config->values[0] > mGain.max_value)) {
6593            return BAD_VALUE;
6594        }
6595    } else {
6596        if ((config->channel_mask & ~mGain.channel_mask) != 0) {
6597            return BAD_VALUE;
6598        }
6599        uint32_t numValues;
6600        if (mUseInChannelMask) {
6601            numValues = audio_channel_count_from_in_mask(config->channel_mask);
6602        } else {
6603            numValues = audio_channel_count_from_out_mask(config->channel_mask);
6604        }
6605        for (size_t i = 0; i < numValues; i++) {
6606            if ((config->values[i] < mGain.min_value) ||
6607                    (config->values[i] > mGain.max_value)) {
6608                return BAD_VALUE;
6609            }
6610        }
6611    }
6612    if ((config->mode & AUDIO_GAIN_MODE_RAMP) == AUDIO_GAIN_MODE_RAMP) {
6613        if ((config->ramp_duration_ms < mGain.min_ramp_ms) ||
6614                    (config->ramp_duration_ms > mGain.max_ramp_ms)) {
6615            return BAD_VALUE;
6616        }
6617    }
6618    return NO_ERROR;
6619}
6620
6621void AudioPolicyManager::AudioGain::dump(int fd, int spaces, int index) const
6622{
6623    const size_t SIZE = 256;
6624    char buffer[SIZE];
6625    String8 result;
6626
6627    snprintf(buffer, SIZE, "%*sGain %d:\n", spaces, "", index+1);
6628    result.append(buffer);
6629    snprintf(buffer, SIZE, "%*s- mode: %08x\n", spaces, "", mGain.mode);
6630    result.append(buffer);
6631    snprintf(buffer, SIZE, "%*s- channel_mask: %08x\n", spaces, "", mGain.channel_mask);
6632    result.append(buffer);
6633    snprintf(buffer, SIZE, "%*s- min_value: %d mB\n", spaces, "", mGain.min_value);
6634    result.append(buffer);
6635    snprintf(buffer, SIZE, "%*s- max_value: %d mB\n", spaces, "", mGain.max_value);
6636    result.append(buffer);
6637    snprintf(buffer, SIZE, "%*s- default_value: %d mB\n", spaces, "", mGain.default_value);
6638    result.append(buffer);
6639    snprintf(buffer, SIZE, "%*s- step_value: %d mB\n", spaces, "", mGain.step_value);
6640    result.append(buffer);
6641    snprintf(buffer, SIZE, "%*s- min_ramp_ms: %d ms\n", spaces, "", mGain.min_ramp_ms);
6642    result.append(buffer);
6643    snprintf(buffer, SIZE, "%*s- max_ramp_ms: %d ms\n", spaces, "", mGain.max_ramp_ms);
6644    result.append(buffer);
6645
6646    write(fd, result.string(), result.size());
6647}
6648
6649// --- AudioPortConfig class implementation
6650
6651AudioPolicyManager::AudioPortConfig::AudioPortConfig()
6652{
6653    mSamplingRate = 0;
6654    mChannelMask = AUDIO_CHANNEL_NONE;
6655    mFormat = AUDIO_FORMAT_INVALID;
6656    mGain.index = -1;
6657}
6658
6659status_t AudioPolicyManager::AudioPortConfig::applyAudioPortConfig(
6660                                                        const struct audio_port_config *config,
6661                                                        struct audio_port_config *backupConfig)
6662{
6663    struct audio_port_config localBackupConfig;
6664    status_t status = NO_ERROR;
6665
6666    localBackupConfig.config_mask = config->config_mask;
6667    toAudioPortConfig(&localBackupConfig);
6668
6669    sp<AudioPort> audioport = getAudioPort();
6670    if (audioport == 0) {
6671        status = NO_INIT;
6672        goto exit;
6673    }
6674    if (config->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE) {
6675        status = audioport->checkExactSamplingRate(config->sample_rate);
6676        if (status != NO_ERROR) {
6677            goto exit;
6678        }
6679        mSamplingRate = config->sample_rate;
6680    }
6681    if (config->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK) {
6682        status = audioport->checkExactChannelMask(config->channel_mask);
6683        if (status != NO_ERROR) {
6684            goto exit;
6685        }
6686        mChannelMask = config->channel_mask;
6687    }
6688    if (config->config_mask & AUDIO_PORT_CONFIG_FORMAT) {
6689        status = audioport->checkFormat(config->format);
6690        if (status != NO_ERROR) {
6691            goto exit;
6692        }
6693        mFormat = config->format;
6694    }
6695    if (config->config_mask & AUDIO_PORT_CONFIG_GAIN) {
6696        status = audioport->checkGain(&config->gain, config->gain.index);
6697        if (status != NO_ERROR) {
6698            goto exit;
6699        }
6700        mGain = config->gain;
6701    }
6702
6703exit:
6704    if (status != NO_ERROR) {
6705        applyAudioPortConfig(&localBackupConfig);
6706    }
6707    if (backupConfig != NULL) {
6708        *backupConfig = localBackupConfig;
6709    }
6710    return status;
6711}
6712
6713void AudioPolicyManager::AudioPortConfig::toAudioPortConfig(
6714                                                    struct audio_port_config *dstConfig,
6715                                                    const struct audio_port_config *srcConfig) const
6716{
6717    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE) {
6718        dstConfig->sample_rate = mSamplingRate;
6719        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE)) {
6720            dstConfig->sample_rate = srcConfig->sample_rate;
6721        }
6722    } else {
6723        dstConfig->sample_rate = 0;
6724    }
6725    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK) {
6726        dstConfig->channel_mask = mChannelMask;
6727        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK)) {
6728            dstConfig->channel_mask = srcConfig->channel_mask;
6729        }
6730    } else {
6731        dstConfig->channel_mask = AUDIO_CHANNEL_NONE;
6732    }
6733    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_FORMAT) {
6734        dstConfig->format = mFormat;
6735        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_FORMAT)) {
6736            dstConfig->format = srcConfig->format;
6737        }
6738    } else {
6739        dstConfig->format = AUDIO_FORMAT_INVALID;
6740    }
6741    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_GAIN) {
6742        dstConfig->gain = mGain;
6743        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_GAIN)) {
6744            dstConfig->gain = srcConfig->gain;
6745        }
6746    } else {
6747        dstConfig->gain.index = -1;
6748    }
6749    if (dstConfig->gain.index != -1) {
6750        dstConfig->config_mask |= AUDIO_PORT_CONFIG_GAIN;
6751    } else {
6752        dstConfig->config_mask &= ~AUDIO_PORT_CONFIG_GAIN;
6753    }
6754}
6755
6756// --- IOProfile class implementation
6757
6758AudioPolicyManager::IOProfile::IOProfile(const String8& name, audio_port_role_t role,
6759                                         const sp<HwModule>& module)
6760    : AudioPort(name, AUDIO_PORT_TYPE_MIX, role, module)
6761{
6762}
6763
6764AudioPolicyManager::IOProfile::~IOProfile()
6765{
6766}
6767
6768// checks if the IO profile is compatible with specified parameters.
6769// Sampling rate, format and channel mask must be specified in order to
6770// get a valid a match
6771bool AudioPolicyManager::IOProfile::isCompatibleProfile(audio_devices_t device,
6772                                                            uint32_t samplingRate,
6773                                                            uint32_t *updatedSamplingRate,
6774                                                            audio_format_t format,
6775                                                            audio_channel_mask_t channelMask,
6776                                                            uint32_t flags) const
6777{
6778    const bool isPlaybackThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SOURCE;
6779    const bool isRecordThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SINK;
6780    ALOG_ASSERT(isPlaybackThread != isRecordThread);
6781
6782    if ((mSupportedDevices.types() & device) != device) {
6783        return false;
6784    }
6785
6786    if (samplingRate == 0) {
6787         return false;
6788    }
6789    uint32_t myUpdatedSamplingRate = samplingRate;
6790    if (isPlaybackThread && checkExactSamplingRate(samplingRate) != NO_ERROR) {
6791         return false;
6792    }
6793    if (isRecordThread && checkCompatibleSamplingRate(samplingRate, &myUpdatedSamplingRate) !=
6794            NO_ERROR) {
6795         return false;
6796    }
6797
6798    if (!audio_is_valid_format(format) || checkFormat(format) != NO_ERROR) {
6799        return false;
6800    }
6801
6802    if (isPlaybackThread && (!audio_is_output_channel(channelMask) ||
6803            checkExactChannelMask(channelMask) != NO_ERROR)) {
6804        return false;
6805    }
6806    if (isRecordThread && (!audio_is_input_channel(channelMask) ||
6807            checkCompatibleChannelMask(channelMask) != NO_ERROR)) {
6808        return false;
6809    }
6810
6811    if (isPlaybackThread && (mFlags & flags) != flags) {
6812        return false;
6813    }
6814    // The only input flag that is allowed to be different is the fast flag.
6815    // An existing fast stream is compatible with a normal track request.
6816    // An existing normal stream is compatible with a fast track request,
6817    // but the fast request will be denied by AudioFlinger and converted to normal track.
6818    if (isRecordThread && ((mFlags ^ flags) &
6819            ~AUDIO_INPUT_FLAG_FAST)) {
6820        return false;
6821    }
6822
6823    if (updatedSamplingRate != NULL) {
6824        *updatedSamplingRate = myUpdatedSamplingRate;
6825    }
6826    return true;
6827}
6828
6829void AudioPolicyManager::IOProfile::dump(int fd)
6830{
6831    const size_t SIZE = 256;
6832    char buffer[SIZE];
6833    String8 result;
6834
6835    AudioPort::dump(fd, 4);
6836
6837    snprintf(buffer, SIZE, "    - flags: 0x%04x\n", mFlags);
6838    result.append(buffer);
6839    snprintf(buffer, SIZE, "    - devices:\n");
6840    result.append(buffer);
6841    write(fd, result.string(), result.size());
6842    for (size_t i = 0; i < mSupportedDevices.size(); i++) {
6843        mSupportedDevices[i]->dump(fd, 6, i);
6844    }
6845}
6846
6847void AudioPolicyManager::IOProfile::log()
6848{
6849    const size_t SIZE = 256;
6850    char buffer[SIZE];
6851    String8 result;
6852
6853    ALOGV("    - sampling rates: ");
6854    for (size_t i = 0; i < mSamplingRates.size(); i++) {
6855        ALOGV("  %d", mSamplingRates[i]);
6856    }
6857
6858    ALOGV("    - channel masks: ");
6859    for (size_t i = 0; i < mChannelMasks.size(); i++) {
6860        ALOGV("  0x%04x", mChannelMasks[i]);
6861    }
6862
6863    ALOGV("    - formats: ");
6864    for (size_t i = 0; i < mFormats.size(); i++) {
6865        ALOGV("  0x%08x", mFormats[i]);
6866    }
6867
6868    ALOGV("    - devices: 0x%04x\n", mSupportedDevices.types());
6869    ALOGV("    - flags: 0x%04x\n", mFlags);
6870}
6871
6872
6873// --- DeviceDescriptor implementation
6874
6875
6876AudioPolicyManager::DeviceDescriptor::DeviceDescriptor(const String8& name, audio_devices_t type) :
6877                     AudioPort(name, AUDIO_PORT_TYPE_DEVICE,
6878                               audio_is_output_device(type) ? AUDIO_PORT_ROLE_SINK :
6879                                                              AUDIO_PORT_ROLE_SOURCE,
6880                             NULL),
6881                     mDeviceType(type), mAddress(""), mId(0)
6882{
6883    if (mGains.size() > 0) {
6884        mGains[0]->getDefaultConfig(&mGain);
6885    }
6886}
6887
6888bool AudioPolicyManager::DeviceDescriptor::equals(const sp<DeviceDescriptor>& other) const
6889{
6890    // Devices are considered equal if they:
6891    // - are of the same type (a device type cannot be AUDIO_DEVICE_NONE)
6892    // - have the same address or one device does not specify the address
6893    // - have the same channel mask or one device does not specify the channel mask
6894    return (mDeviceType == other->mDeviceType) &&
6895           (mAddress == "" || other->mAddress == "" || mAddress == other->mAddress) &&
6896           (mChannelMask == 0 || other->mChannelMask == 0 ||
6897                mChannelMask == other->mChannelMask);
6898}
6899
6900void AudioPolicyManager::DeviceVector::refreshTypes()
6901{
6902    mDeviceTypes = AUDIO_DEVICE_NONE;
6903    for(size_t i = 0; i < size(); i++) {
6904        mDeviceTypes |= itemAt(i)->mDeviceType;
6905    }
6906    ALOGV("DeviceVector::refreshTypes() mDeviceTypes %08x", mDeviceTypes);
6907}
6908
6909ssize_t AudioPolicyManager::DeviceVector::indexOf(const sp<DeviceDescriptor>& item) const
6910{
6911    for(size_t i = 0; i < size(); i++) {
6912        if (item->equals(itemAt(i))) {
6913            return i;
6914        }
6915    }
6916    return -1;
6917}
6918
6919ssize_t AudioPolicyManager::DeviceVector::add(const sp<DeviceDescriptor>& item)
6920{
6921    ssize_t ret = indexOf(item);
6922
6923    if (ret < 0) {
6924        ret = SortedVector::add(item);
6925        if (ret >= 0) {
6926            refreshTypes();
6927        }
6928    } else {
6929        ALOGW("DeviceVector::add device %08x already in", item->mDeviceType);
6930        ret = -1;
6931    }
6932    return ret;
6933}
6934
6935ssize_t AudioPolicyManager::DeviceVector::remove(const sp<DeviceDescriptor>& item)
6936{
6937    size_t i;
6938    ssize_t ret = indexOf(item);
6939
6940    if (ret < 0) {
6941        ALOGW("DeviceVector::remove device %08x not in", item->mDeviceType);
6942    } else {
6943        ret = SortedVector::removeAt(ret);
6944        if (ret >= 0) {
6945            refreshTypes();
6946        }
6947    }
6948    return ret;
6949}
6950
6951void AudioPolicyManager::DeviceVector::loadDevicesFromType(audio_devices_t types)
6952{
6953    DeviceVector deviceList;
6954
6955    uint32_t role_bit = AUDIO_DEVICE_BIT_IN & types;
6956    types &= ~role_bit;
6957
6958    while (types) {
6959        uint32_t i = 31 - __builtin_clz(types);
6960        uint32_t type = 1 << i;
6961        types &= ~type;
6962        add(new DeviceDescriptor(String8(""), type | role_bit));
6963    }
6964}
6965
6966void AudioPolicyManager::DeviceVector::loadDevicesFromName(char *name,
6967                                                           const DeviceVector& declaredDevices)
6968{
6969    char *devName = strtok(name, "|");
6970    while (devName != NULL) {
6971        if (strlen(devName) != 0) {
6972            audio_devices_t type = stringToEnum(sDeviceNameToEnumTable,
6973                                 ARRAY_SIZE(sDeviceNameToEnumTable),
6974                                 devName);
6975            if (type != AUDIO_DEVICE_NONE) {
6976                sp<DeviceDescriptor> dev = new DeviceDescriptor(String8(""), type);
6977                if (type == AUDIO_DEVICE_IN_REMOTE_SUBMIX) {
6978                    dev->mAddress = String8("0");
6979                }
6980                add(dev);
6981            } else {
6982                sp<DeviceDescriptor> deviceDesc =
6983                        declaredDevices.getDeviceFromName(String8(devName));
6984                if (deviceDesc != 0) {
6985                    add(deviceDesc);
6986                }
6987            }
6988         }
6989        devName = strtok(NULL, "|");
6990     }
6991}
6992
6993sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDevice(
6994                                                        audio_devices_t type, String8 address) const
6995{
6996    sp<DeviceDescriptor> device;
6997    for (size_t i = 0; i < size(); i++) {
6998        if (itemAt(i)->mDeviceType == type) {
6999            device = itemAt(i);
7000            if (itemAt(i)->mAddress = address) {
7001                break;
7002            }
7003        }
7004    }
7005    ALOGV("DeviceVector::getDevice() for type %d address %s found %p",
7006          type, address.string(), device.get());
7007    return device;
7008}
7009
7010sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDeviceFromId(
7011                                                                    audio_port_handle_t id) const
7012{
7013    sp<DeviceDescriptor> device;
7014    for (size_t i = 0; i < size(); i++) {
7015        ALOGV("DeviceVector::getDeviceFromId(%d) itemAt(%zu)->mId %d", id, i, itemAt(i)->mId);
7016        if (itemAt(i)->mId == id) {
7017            device = itemAt(i);
7018            break;
7019        }
7020    }
7021    return device;
7022}
7023
7024AudioPolicyManager::DeviceVector AudioPolicyManager::DeviceVector::getDevicesFromType(
7025                                                                        audio_devices_t type) const
7026{
7027    DeviceVector devices;
7028    for (size_t i = 0; (i < size()) && (type != AUDIO_DEVICE_NONE); i++) {
7029        if (itemAt(i)->mDeviceType & type & ~AUDIO_DEVICE_BIT_IN) {
7030            devices.add(itemAt(i));
7031            type &= ~itemAt(i)->mDeviceType;
7032            ALOGV("DeviceVector::getDevicesFromType() for type %x found %p",
7033                  itemAt(i)->mDeviceType, itemAt(i).get());
7034        }
7035    }
7036    return devices;
7037}
7038
7039AudioPolicyManager::DeviceVector AudioPolicyManager::DeviceVector::getDevicesFromTypeAddr(
7040        audio_devices_t type, String8 address) const
7041{
7042    DeviceVector devices;
7043    //ALOGV("   looking for device=%x, addr=%s", type, address.string());
7044    for (size_t i = 0; i < size(); i++) {
7045        //ALOGV("     at i=%d: device=%x, addr=%s",
7046        //        i, itemAt(i)->mDeviceType, itemAt(i)->mAddress.string());
7047        if (itemAt(i)->mDeviceType == type) {
7048            if (itemAt(i)->mAddress == address) {
7049                //ALOGV("      found matching address %s", address.string());
7050                devices.add(itemAt(i));
7051            }
7052        }
7053    }
7054    return devices;
7055}
7056
7057sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDeviceFromName(
7058        const String8& name) const
7059{
7060    sp<DeviceDescriptor> device;
7061    for (size_t i = 0; i < size(); i++) {
7062        if (itemAt(i)->mName == name) {
7063            device = itemAt(i);
7064            break;
7065        }
7066    }
7067    return device;
7068}
7069
7070void AudioPolicyManager::DeviceDescriptor::toAudioPortConfig(
7071                                                    struct audio_port_config *dstConfig,
7072                                                    const struct audio_port_config *srcConfig) const
7073{
7074    dstConfig->config_mask = AUDIO_PORT_CONFIG_CHANNEL_MASK|AUDIO_PORT_CONFIG_GAIN;
7075    if (srcConfig != NULL) {
7076        dstConfig->config_mask |= srcConfig->config_mask;
7077    }
7078
7079    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
7080
7081    dstConfig->id = mId;
7082    dstConfig->role = audio_is_output_device(mDeviceType) ?
7083                        AUDIO_PORT_ROLE_SINK : AUDIO_PORT_ROLE_SOURCE;
7084    dstConfig->type = AUDIO_PORT_TYPE_DEVICE;
7085    dstConfig->ext.device.type = mDeviceType;
7086    dstConfig->ext.device.hw_module = mModule->mHandle;
7087    strncpy(dstConfig->ext.device.address, mAddress.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN);
7088}
7089
7090void AudioPolicyManager::DeviceDescriptor::toAudioPort(struct audio_port *port) const
7091{
7092    ALOGV("DeviceDescriptor::toAudioPort() handle %d type %x", mId, mDeviceType);
7093    AudioPort::toAudioPort(port);
7094    port->id = mId;
7095    toAudioPortConfig(&port->active_config);
7096    port->ext.device.type = mDeviceType;
7097    port->ext.device.hw_module = mModule->mHandle;
7098    strncpy(port->ext.device.address, mAddress.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN);
7099}
7100
7101status_t AudioPolicyManager::DeviceDescriptor::dump(int fd, int spaces, int index) const
7102{
7103    const size_t SIZE = 256;
7104    char buffer[SIZE];
7105    String8 result;
7106
7107    snprintf(buffer, SIZE, "%*sDevice %d:\n", spaces, "", index+1);
7108    result.append(buffer);
7109    if (mId != 0) {
7110        snprintf(buffer, SIZE, "%*s- id: %2d\n", spaces, "", mId);
7111        result.append(buffer);
7112    }
7113    snprintf(buffer, SIZE, "%*s- type: %-48s\n", spaces, "",
7114                                              enumToString(sDeviceNameToEnumTable,
7115                                                           ARRAY_SIZE(sDeviceNameToEnumTable),
7116                                                           mDeviceType));
7117    result.append(buffer);
7118    if (mAddress.size() != 0) {
7119        snprintf(buffer, SIZE, "%*s- address: %-32s\n", spaces, "", mAddress.string());
7120        result.append(buffer);
7121    }
7122    write(fd, result.string(), result.size());
7123    AudioPort::dump(fd, spaces);
7124
7125    return NO_ERROR;
7126}
7127
7128status_t AudioPolicyManager::AudioPatch::dump(int fd, int spaces, int index) const
7129{
7130    const size_t SIZE = 256;
7131    char buffer[SIZE];
7132    String8 result;
7133
7134
7135    snprintf(buffer, SIZE, "%*sAudio patch %d:\n", spaces, "", index+1);
7136    result.append(buffer);
7137    snprintf(buffer, SIZE, "%*s- handle: %2d\n", spaces, "", mHandle);
7138    result.append(buffer);
7139    snprintf(buffer, SIZE, "%*s- audio flinger handle: %2d\n", spaces, "", mAfPatchHandle);
7140    result.append(buffer);
7141    snprintf(buffer, SIZE, "%*s- owner uid: %2d\n", spaces, "", mUid);
7142    result.append(buffer);
7143    snprintf(buffer, SIZE, "%*s- %d sources:\n", spaces, "", mPatch.num_sources);
7144    result.append(buffer);
7145    for (size_t i = 0; i < mPatch.num_sources; i++) {
7146        if (mPatch.sources[i].type == AUDIO_PORT_TYPE_DEVICE) {
7147            snprintf(buffer, SIZE, "%*s- Device ID %d %s\n", spaces + 2, "",
7148                     mPatch.sources[i].id, enumToString(sDeviceNameToEnumTable,
7149                                                        ARRAY_SIZE(sDeviceNameToEnumTable),
7150                                                        mPatch.sources[i].ext.device.type));
7151        } else {
7152            snprintf(buffer, SIZE, "%*s- Mix ID %d I/O handle %d\n", spaces + 2, "",
7153                     mPatch.sources[i].id, mPatch.sources[i].ext.mix.handle);
7154        }
7155        result.append(buffer);
7156    }
7157    snprintf(buffer, SIZE, "%*s- %d sinks:\n", spaces, "", mPatch.num_sinks);
7158    result.append(buffer);
7159    for (size_t i = 0; i < mPatch.num_sinks; i++) {
7160        if (mPatch.sinks[i].type == AUDIO_PORT_TYPE_DEVICE) {
7161            snprintf(buffer, SIZE, "%*s- Device ID %d %s\n", spaces + 2, "",
7162                     mPatch.sinks[i].id, enumToString(sDeviceNameToEnumTable,
7163                                                        ARRAY_SIZE(sDeviceNameToEnumTable),
7164                                                        mPatch.sinks[i].ext.device.type));
7165        } else {
7166            snprintf(buffer, SIZE, "%*s- Mix ID %d I/O handle %d\n", spaces + 2, "",
7167                     mPatch.sinks[i].id, mPatch.sinks[i].ext.mix.handle);
7168        }
7169        result.append(buffer);
7170    }
7171
7172    write(fd, result.string(), result.size());
7173    return NO_ERROR;
7174}
7175
7176// --- audio_policy.conf file parsing
7177
7178uint32_t AudioPolicyManager::parseOutputFlagNames(char *name)
7179{
7180    uint32_t flag = 0;
7181
7182    // it is OK to cast name to non const here as we are not going to use it after
7183    // strtok() modifies it
7184    char *flagName = strtok(name, "|");
7185    while (flagName != NULL) {
7186        if (strlen(flagName) != 0) {
7187            flag |= stringToEnum(sOutputFlagNameToEnumTable,
7188                               ARRAY_SIZE(sOutputFlagNameToEnumTable),
7189                               flagName);
7190        }
7191        flagName = strtok(NULL, "|");
7192    }
7193    //force direct flag if offload flag is set: offloading implies a direct output stream
7194    // and all common behaviors are driven by checking only the direct flag
7195    // this should normally be set appropriately in the policy configuration file
7196    if ((flag & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
7197        flag |= AUDIO_OUTPUT_FLAG_DIRECT;
7198    }
7199
7200    return flag;
7201}
7202
7203uint32_t AudioPolicyManager::parseInputFlagNames(char *name)
7204{
7205    uint32_t flag = 0;
7206
7207    // it is OK to cast name to non const here as we are not going to use it after
7208    // strtok() modifies it
7209    char *flagName = strtok(name, "|");
7210    while (flagName != NULL) {
7211        if (strlen(flagName) != 0) {
7212            flag |= stringToEnum(sInputFlagNameToEnumTable,
7213                               ARRAY_SIZE(sInputFlagNameToEnumTable),
7214                               flagName);
7215        }
7216        flagName = strtok(NULL, "|");
7217    }
7218    return flag;
7219}
7220
7221audio_devices_t AudioPolicyManager::parseDeviceNames(char *name)
7222{
7223    uint32_t device = 0;
7224
7225    char *devName = strtok(name, "|");
7226    while (devName != NULL) {
7227        if (strlen(devName) != 0) {
7228            device |= stringToEnum(sDeviceNameToEnumTable,
7229                                 ARRAY_SIZE(sDeviceNameToEnumTable),
7230                                 devName);
7231         }
7232        devName = strtok(NULL, "|");
7233     }
7234    return device;
7235}
7236
7237void AudioPolicyManager::loadHwModule(cnode *root)
7238{
7239    status_t status = NAME_NOT_FOUND;
7240    cnode *node;
7241    sp<HwModule> module = new HwModule(root->name);
7242
7243    node = config_find(root, DEVICES_TAG);
7244    if (node != NULL) {
7245        node = node->first_child;
7246        while (node) {
7247            ALOGV("loadHwModule() loading device %s", node->name);
7248            status_t tmpStatus = module->loadDevice(node);
7249            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
7250                status = tmpStatus;
7251            }
7252            node = node->next;
7253        }
7254    }
7255    node = config_find(root, OUTPUTS_TAG);
7256    if (node != NULL) {
7257        node = node->first_child;
7258        while (node) {
7259            ALOGV("loadHwModule() loading output %s", node->name);
7260            status_t tmpStatus = module->loadOutput(node);
7261            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
7262                status = tmpStatus;
7263            }
7264            node = node->next;
7265        }
7266    }
7267    node = config_find(root, INPUTS_TAG);
7268    if (node != NULL) {
7269        node = node->first_child;
7270        while (node) {
7271            ALOGV("loadHwModule() loading input %s", node->name);
7272            status_t tmpStatus = module->loadInput(node);
7273            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
7274                status = tmpStatus;
7275            }
7276            node = node->next;
7277        }
7278    }
7279    loadGlobalConfig(root, module);
7280
7281    if (status == NO_ERROR) {
7282        mHwModules.add(module);
7283    }
7284}
7285
7286void AudioPolicyManager::loadHwModules(cnode *root)
7287{
7288    cnode *node = config_find(root, AUDIO_HW_MODULE_TAG);
7289    if (node == NULL) {
7290        return;
7291    }
7292
7293    node = node->first_child;
7294    while (node) {
7295        ALOGV("loadHwModules() loading module %s", node->name);
7296        loadHwModule(node);
7297        node = node->next;
7298    }
7299}
7300
7301void AudioPolicyManager::loadGlobalConfig(cnode *root, const sp<HwModule>& module)
7302{
7303    cnode *node = config_find(root, GLOBAL_CONFIG_TAG);
7304
7305    if (node == NULL) {
7306        return;
7307    }
7308    DeviceVector declaredDevices;
7309    if (module != NULL) {
7310        declaredDevices = module->mDeclaredDevices;
7311    }
7312
7313    node = node->first_child;
7314    while (node) {
7315        if (strcmp(ATTACHED_OUTPUT_DEVICES_TAG, node->name) == 0) {
7316            mAvailableOutputDevices.loadDevicesFromName((char *)node->value,
7317                                                        declaredDevices);
7318            ALOGV("loadGlobalConfig() Attached Output Devices %08x",
7319                  mAvailableOutputDevices.types());
7320        } else if (strcmp(DEFAULT_OUTPUT_DEVICE_TAG, node->name) == 0) {
7321            audio_devices_t device = (audio_devices_t)stringToEnum(sDeviceNameToEnumTable,
7322                                              ARRAY_SIZE(sDeviceNameToEnumTable),
7323                                              (char *)node->value);
7324            if (device != AUDIO_DEVICE_NONE) {
7325                mDefaultOutputDevice = new DeviceDescriptor(String8(""), device);
7326            } else {
7327                ALOGW("loadGlobalConfig() default device not specified");
7328            }
7329            ALOGV("loadGlobalConfig() mDefaultOutputDevice %08x", mDefaultOutputDevice->mDeviceType);
7330        } else if (strcmp(ATTACHED_INPUT_DEVICES_TAG, node->name) == 0) {
7331            mAvailableInputDevices.loadDevicesFromName((char *)node->value,
7332                                                       declaredDevices);
7333            ALOGV("loadGlobalConfig() Available InputDevices %08x", mAvailableInputDevices.types());
7334        } else if (strcmp(SPEAKER_DRC_ENABLED_TAG, node->name) == 0) {
7335            mSpeakerDrcEnabled = stringToBool((char *)node->value);
7336            ALOGV("loadGlobalConfig() mSpeakerDrcEnabled = %d", mSpeakerDrcEnabled);
7337        } else if (strcmp(AUDIO_HAL_VERSION_TAG, node->name) == 0) {
7338            uint32_t major, minor;
7339            sscanf((char *)node->value, "%u.%u", &major, &minor);
7340            module->mHalVersion = HARDWARE_DEVICE_API_VERSION(major, minor);
7341            ALOGV("loadGlobalConfig() mHalVersion = %04x major %u minor %u",
7342                  module->mHalVersion, major, minor);
7343        }
7344        node = node->next;
7345    }
7346}
7347
7348status_t AudioPolicyManager::loadAudioPolicyConfig(const char *path)
7349{
7350    cnode *root;
7351    char *data;
7352
7353    data = (char *)load_file(path, NULL);
7354    if (data == NULL) {
7355        return -ENODEV;
7356    }
7357    root = config_node("", "");
7358    config_load(root, data);
7359
7360    loadHwModules(root);
7361    // legacy audio_policy.conf files have one global_configuration section
7362    loadGlobalConfig(root, getModuleFromName(AUDIO_HARDWARE_MODULE_ID_PRIMARY));
7363    config_free(root);
7364    free(root);
7365    free(data);
7366
7367    ALOGI("loadAudioPolicyConfig() loaded %s\n", path);
7368
7369    return NO_ERROR;
7370}
7371
7372void AudioPolicyManager::defaultAudioPolicyConfig(void)
7373{
7374    sp<HwModule> module;
7375    sp<IOProfile> profile;
7376    sp<DeviceDescriptor> defaultInputDevice = new DeviceDescriptor(String8(""),
7377                                                                   AUDIO_DEVICE_IN_BUILTIN_MIC);
7378    mAvailableOutputDevices.add(mDefaultOutputDevice);
7379    mAvailableInputDevices.add(defaultInputDevice);
7380
7381    module = new HwModule("primary");
7382
7383    profile = new IOProfile(String8("primary"), AUDIO_PORT_ROLE_SOURCE, module);
7384    profile->mSamplingRates.add(44100);
7385    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
7386    profile->mChannelMasks.add(AUDIO_CHANNEL_OUT_STEREO);
7387    profile->mSupportedDevices.add(mDefaultOutputDevice);
7388    profile->mFlags = AUDIO_OUTPUT_FLAG_PRIMARY;
7389    module->mOutputProfiles.add(profile);
7390
7391    profile = new IOProfile(String8("primary"), AUDIO_PORT_ROLE_SINK, module);
7392    profile->mSamplingRates.add(8000);
7393    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
7394    profile->mChannelMasks.add(AUDIO_CHANNEL_IN_MONO);
7395    profile->mSupportedDevices.add(defaultInputDevice);
7396    module->mInputProfiles.add(profile);
7397
7398    mHwModules.add(module);
7399}
7400
7401audio_stream_type_t AudioPolicyManager::streamTypefromAttributesInt(const audio_attributes_t *attr)
7402{
7403    // flags to stream type mapping
7404    if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
7405        return AUDIO_STREAM_ENFORCED_AUDIBLE;
7406    }
7407    if ((attr->flags & AUDIO_FLAG_SCO) == AUDIO_FLAG_SCO) {
7408        return AUDIO_STREAM_BLUETOOTH_SCO;
7409    }
7410
7411    // usage to stream type mapping
7412    switch (attr->usage) {
7413    case AUDIO_USAGE_MEDIA:
7414    case AUDIO_USAGE_GAME:
7415    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
7416    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
7417        return AUDIO_STREAM_MUSIC;
7418    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
7419        return AUDIO_STREAM_SYSTEM;
7420    case AUDIO_USAGE_VOICE_COMMUNICATION:
7421        return AUDIO_STREAM_VOICE_CALL;
7422
7423    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
7424        return AUDIO_STREAM_DTMF;
7425
7426    case AUDIO_USAGE_ALARM:
7427        return AUDIO_STREAM_ALARM;
7428    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
7429        return AUDIO_STREAM_RING;
7430
7431    case AUDIO_USAGE_NOTIFICATION:
7432    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
7433    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
7434    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
7435    case AUDIO_USAGE_NOTIFICATION_EVENT:
7436        return AUDIO_STREAM_NOTIFICATION;
7437
7438    case AUDIO_USAGE_UNKNOWN:
7439    default:
7440        return AUDIO_STREAM_MUSIC;
7441    }
7442}
7443}; // namespace android
7444