AudioPolicyManager.cpp revision 95511add8ad4d440c67272503559f5042c4e6f1f 
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
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
220    ALOGV("setDeviceConnectionState() device: %x, state %d, address %s",
221            device, state, address.string());
222
223    // connect/disconnect only 1 device at a time
224    if (!audio_is_output_device(device) && !audio_is_input_device(device)) return BAD_VALUE;
225
226    // handle output devices
227    if (audio_is_output_device(device)) {
228        SortedVector <audio_io_handle_t> outputs;
229
230        sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
231        devDesc->mAddress = address;
232        ssize_t index = mAvailableOutputDevices.indexOf(devDesc);
233
234        // save a copy of the opened output descriptors before any output is opened or closed
235        // by checkOutputsForDevice(). This will be needed by checkOutputForAllStrategies()
236        mPreviousOutputs = mOutputs;
237        switch (state)
238        {
239        // handle output device connection
240        case AUDIO_POLICY_DEVICE_STATE_AVAILABLE:
241            if (index >= 0) {
242                ALOGW("setDeviceConnectionState() device already connected: %x", device);
243                return INVALID_OPERATION;
244            }
245            ALOGV("setDeviceConnectionState() connecting device %x", device);
246
247            // register new device as available
248            index = mAvailableOutputDevices.add(devDesc);
249            if (index >= 0) {
250                sp<HwModule> module = getModuleForDevice(device);
251                if (module == 0) {
252                    ALOGD("setDeviceConnectionState() could not find HW module for device %08x",
253                          device);
254                    mAvailableOutputDevices.remove(devDesc);
255                    return INVALID_OPERATION;
256                }
257                mAvailableOutputDevices[index]->mId = nextUniqueId();
258                mAvailableOutputDevices[index]->mModule = module;
259            } else {
260                return NO_MEMORY;
261            }
262
263            if (checkOutputsForDevice(devDesc, state, outputs, address) != NO_ERROR) {
264                mAvailableOutputDevices.remove(devDesc);
265                return INVALID_OPERATION;
266            }
267            // outputs should never be empty here
268            ALOG_ASSERT(outputs.size() != 0, "setDeviceConnectionState():"
269                    "checkOutputsForDevice() returned no outputs but status OK");
270            ALOGV("setDeviceConnectionState() checkOutputsForDevice() returned %zu outputs",
271                  outputs.size());
272            break;
273        // handle output device disconnection
274        case AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE: {
275            if (index < 0) {
276                ALOGW("setDeviceConnectionState() device not connected: %x", device);
277                return INVALID_OPERATION;
278            }
279
280            ALOGV("setDeviceConnectionState() disconnecting output device %x", device);
281
282            // Set Disconnect to HALs
283            AudioParameter param = AudioParameter(address);
284            param.addInt(String8(AUDIO_PARAMETER_DEVICE_DISCONNECT), device);
285            mpClientInterface->setParameters(AUDIO_IO_HANDLE_NONE, param.toString());
286
287            // remove device from available output devices
288            mAvailableOutputDevices.remove(devDesc);
289
290            checkOutputsForDevice(devDesc, state, outputs, address);
291            } break;
292
293        default:
294            ALOGE("setDeviceConnectionState() invalid state: %x", state);
295            return BAD_VALUE;
296        }
297
298        // checkA2dpSuspend must run before checkOutputForAllStrategies so that A2DP
299        // output is suspended before any tracks are moved to it
300        checkA2dpSuspend();
301        checkOutputForAllStrategies();
302        // outputs must be closed after checkOutputForAllStrategies() is executed
303        if (!outputs.isEmpty()) {
304            for (size_t i = 0; i < outputs.size(); i++) {
305                sp<AudioOutputDescriptor> desc = mOutputs.valueFor(outputs[i]);
306                // close unused outputs after device disconnection or direct outputs that have been
307                // opened by checkOutputsForDevice() to query dynamic parameters
308                if ((state == AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE) ||
309                        (((desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) != 0) &&
310                         (desc->mDirectOpenCount == 0))) {
311                    closeOutput(outputs[i]);
312                }
313            }
314            // check again after closing A2DP output to reset mA2dpSuspended if needed
315            checkA2dpSuspend();
316        }
317
318        updateDevicesAndOutputs();
319        if (mPhoneState == AUDIO_MODE_IN_CALL) {
320            audio_devices_t newDevice = getNewOutputDevice(mPrimaryOutput, false /*fromCache*/);
321            updateCallRouting(newDevice);
322        }
323        for (size_t i = 0; i < mOutputs.size(); i++) {
324            audio_io_handle_t output = mOutputs.keyAt(i);
325            if ((mPhoneState != AUDIO_MODE_IN_CALL) || (output != mPrimaryOutput)) {
326                audio_devices_t newDevice = getNewOutputDevice(mOutputs.keyAt(i),
327                                                               true /*fromCache*/);
328                // do not force device change on duplicated output because if device is 0, it will
329                // also force a device 0 for the two outputs it is duplicated to which may override
330                // a valid device selection on those outputs.
331                bool force = !mOutputs.valueAt(i)->isDuplicated()
332                        && (!deviceDistinguishesOnAddress(device)
333                                // always force when disconnecting (a non-duplicated device)
334                                || (state == AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE));
335                setOutputDevice(output, newDevice, force, 0);
336            }
337        }
338
339        mpClientInterface->onAudioPortListUpdate();
340        return NO_ERROR;
341    }  // end if is output device
342
343    // handle input devices
344    if (audio_is_input_device(device)) {
345        SortedVector <audio_io_handle_t> inputs;
346
347        sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
348        devDesc->mAddress = address;
349        ssize_t index = mAvailableInputDevices.indexOf(devDesc);
350        switch (state)
351        {
352        // handle input device connection
353        case AUDIO_POLICY_DEVICE_STATE_AVAILABLE: {
354            if (index >= 0) {
355                ALOGW("setDeviceConnectionState() device already connected: %d", device);
356                return INVALID_OPERATION;
357            }
358            sp<HwModule> module = getModuleForDevice(device);
359            if (module == NULL) {
360                ALOGW("setDeviceConnectionState(): could not find HW module for device %08x",
361                      device);
362                return INVALID_OPERATION;
363            }
364            if (checkInputsForDevice(device, state, inputs, address) != NO_ERROR) {
365                return INVALID_OPERATION;
366            }
367
368            index = mAvailableInputDevices.add(devDesc);
369            if (index >= 0) {
370                mAvailableInputDevices[index]->mId = nextUniqueId();
371                mAvailableInputDevices[index]->mModule = module;
372            } else {
373                return NO_MEMORY;
374            }
375        } break;
376
377        // handle input device disconnection
378        case AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE: {
379            if (index < 0) {
380                ALOGW("setDeviceConnectionState() device not connected: %d", device);
381                return INVALID_OPERATION;
382            }
383
384            ALOGV("setDeviceConnectionState() disconnecting input device %x", device);
385
386            // Set Disconnect to HALs
387            AudioParameter param = AudioParameter(address);
388            param.addInt(String8(AUDIO_PARAMETER_DEVICE_DISCONNECT), device);
389            mpClientInterface->setParameters(AUDIO_IO_HANDLE_NONE, param.toString());
390
391            checkInputsForDevice(device, state, inputs, address);
392            mAvailableInputDevices.remove(devDesc);
393
394        } break;
395
396        default:
397            ALOGE("setDeviceConnectionState() invalid state: %x", state);
398            return BAD_VALUE;
399        }
400
401        closeAllInputs();
402
403        if (mPhoneState == AUDIO_MODE_IN_CALL) {
404            audio_devices_t newDevice = getNewOutputDevice(mPrimaryOutput, false /*fromCache*/);
405            updateCallRouting(newDevice);
406        }
407
408        mpClientInterface->onAudioPortListUpdate();
409        return NO_ERROR;
410    } // end if is input device
411
412    ALOGW("setDeviceConnectionState() invalid device: %x", device);
413    return BAD_VALUE;
414}
415
416audio_policy_dev_state_t AudioPolicyManager::getDeviceConnectionState(audio_devices_t device,
417                                                  const char *device_address)
418{
419    audio_policy_dev_state_t state = AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
420    sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
421    devDesc->mAddress = (device_address == NULL) ? String8("") : String8(device_address);
422    ssize_t index;
423    DeviceVector *deviceVector;
424
425    if (audio_is_output_device(device)) {
426        deviceVector = &mAvailableOutputDevices;
427    } else if (audio_is_input_device(device)) {
428        deviceVector = &mAvailableInputDevices;
429    } else {
430        ALOGW("getDeviceConnectionState() invalid device type %08x", device);
431        return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
432    }
433
434    index = deviceVector->indexOf(devDesc);
435    if (index >= 0) {
436        return AUDIO_POLICY_DEVICE_STATE_AVAILABLE;
437    } else {
438        return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
439    }
440}
441
442void AudioPolicyManager::updateCallRouting(audio_devices_t rxDevice, int delayMs)
443{
444    bool createTxPatch = false;
445    struct audio_patch patch;
446    patch.num_sources = 1;
447    patch.num_sinks = 1;
448    status_t status;
449    audio_patch_handle_t afPatchHandle;
450    DeviceVector deviceList;
451
452    audio_devices_t txDevice = getDeviceForInputSource(AUDIO_SOURCE_VOICE_COMMUNICATION);
453    ALOGV("updateCallRouting device rxDevice %08x txDevice %08x", rxDevice, txDevice);
454
455    // release existing RX patch if any
456    if (mCallRxPatch != 0) {
457        mpClientInterface->releaseAudioPatch(mCallRxPatch->mAfPatchHandle, 0);
458        mCallRxPatch.clear();
459    }
460    // release TX patch if any
461    if (mCallTxPatch != 0) {
462        mpClientInterface->releaseAudioPatch(mCallTxPatch->mAfPatchHandle, 0);
463        mCallTxPatch.clear();
464    }
465
466    // If the RX device is on the primary HW module, then use legacy routing method for voice calls
467    // via setOutputDevice() on primary output.
468    // Otherwise, create two audio patches for TX and RX path.
469    if (availablePrimaryOutputDevices() & rxDevice) {
470        setOutputDevice(mPrimaryOutput, rxDevice, true, delayMs);
471        // If the TX device is also on the primary HW module, setOutputDevice() will take care
472        // of it due to legacy implementation. If not, create a patch.
473        if ((availablePrimaryInputDevices() & txDevice & ~AUDIO_DEVICE_BIT_IN)
474                == AUDIO_DEVICE_NONE) {
475            createTxPatch = true;
476        }
477    } else {
478        // create RX path audio patch
479        deviceList = mAvailableOutputDevices.getDevicesFromType(rxDevice);
480        ALOG_ASSERT(!deviceList.isEmpty(),
481                    "updateCallRouting() selected device not in output device list");
482        sp<DeviceDescriptor> rxSinkDeviceDesc = deviceList.itemAt(0);
483        deviceList = mAvailableInputDevices.getDevicesFromType(AUDIO_DEVICE_IN_TELEPHONY_RX);
484        ALOG_ASSERT(!deviceList.isEmpty(),
485                    "updateCallRouting() no telephony RX device");
486        sp<DeviceDescriptor> rxSourceDeviceDesc = deviceList.itemAt(0);
487
488        rxSourceDeviceDesc->toAudioPortConfig(&patch.sources[0]);
489        rxSinkDeviceDesc->toAudioPortConfig(&patch.sinks[0]);
490
491        // request to reuse existing output stream if one is already opened to reach the RX device
492        SortedVector<audio_io_handle_t> outputs =
493                                getOutputsForDevice(rxDevice, mOutputs);
494        audio_io_handle_t output = selectOutput(outputs,
495                                                AUDIO_OUTPUT_FLAG_NONE,
496                                                AUDIO_FORMAT_INVALID);
497        if (output != AUDIO_IO_HANDLE_NONE) {
498            sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
499            ALOG_ASSERT(!outputDesc->isDuplicated(),
500                        "updateCallRouting() RX device output is duplicated");
501            outputDesc->toAudioPortConfig(&patch.sources[1]);
502            patch.num_sources = 2;
503        }
504
505        afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
506        status = mpClientInterface->createAudioPatch(&patch, &afPatchHandle, 0);
507        ALOGW_IF(status != NO_ERROR, "updateCallRouting() error %d creating RX audio patch",
508                                               status);
509        if (status == NO_ERROR) {
510            mCallRxPatch = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
511                                       &patch, mUidCached);
512            mCallRxPatch->mAfPatchHandle = afPatchHandle;
513            mCallRxPatch->mUid = mUidCached;
514        }
515        createTxPatch = true;
516    }
517    if (createTxPatch) {
518
519        struct audio_patch patch;
520        patch.num_sources = 1;
521        patch.num_sinks = 1;
522        deviceList = mAvailableInputDevices.getDevicesFromType(txDevice);
523        ALOG_ASSERT(!deviceList.isEmpty(),
524                    "updateCallRouting() selected device not in input device list");
525        sp<DeviceDescriptor> txSourceDeviceDesc = deviceList.itemAt(0);
526        txSourceDeviceDesc->toAudioPortConfig(&patch.sources[0]);
527        deviceList = mAvailableOutputDevices.getDevicesFromType(AUDIO_DEVICE_OUT_TELEPHONY_TX);
528        ALOG_ASSERT(!deviceList.isEmpty(),
529                    "updateCallRouting() no telephony TX device");
530        sp<DeviceDescriptor> txSinkDeviceDesc = deviceList.itemAt(0);
531        txSinkDeviceDesc->toAudioPortConfig(&patch.sinks[0]);
532
533        SortedVector<audio_io_handle_t> outputs =
534                                getOutputsForDevice(AUDIO_DEVICE_OUT_TELEPHONY_TX, mOutputs);
535        audio_io_handle_t output = selectOutput(outputs,
536                                                AUDIO_OUTPUT_FLAG_NONE,
537                                                AUDIO_FORMAT_INVALID);
538        // request to reuse existing output stream if one is already opened to reach the TX
539        // path output device
540        if (output != AUDIO_IO_HANDLE_NONE) {
541            sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
542            ALOG_ASSERT(!outputDesc->isDuplicated(),
543                        "updateCallRouting() RX device output is duplicated");
544            outputDesc->toAudioPortConfig(&patch.sources[1]);
545            patch.num_sources = 2;
546        }
547
548        afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
549        status = mpClientInterface->createAudioPatch(&patch, &afPatchHandle, 0);
550        ALOGW_IF(status != NO_ERROR, "setPhoneState() error %d creating TX audio patch",
551                                               status);
552        if (status == NO_ERROR) {
553            mCallTxPatch = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
554                                       &patch, mUidCached);
555            mCallTxPatch->mAfPatchHandle = afPatchHandle;
556            mCallTxPatch->mUid = mUidCached;
557        }
558    }
559}
560
561void AudioPolicyManager::setPhoneState(audio_mode_t state)
562{
563    ALOGV("setPhoneState() state %d", state);
564    if (state < 0 || state >= AUDIO_MODE_CNT) {
565        ALOGW("setPhoneState() invalid state %d", state);
566        return;
567    }
568
569    if (state == mPhoneState ) {
570        ALOGW("setPhoneState() setting same state %d", state);
571        return;
572    }
573
574    // if leaving call state, handle special case of active streams
575    // pertaining to sonification strategy see handleIncallSonification()
576    if (isInCall()) {
577        ALOGV("setPhoneState() in call state management: new state is %d", state);
578        for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
579            handleIncallSonification((audio_stream_type_t)stream, false, true);
580        }
581    }
582
583    // store previous phone state for management of sonification strategy below
584    int oldState = mPhoneState;
585    mPhoneState = state;
586    bool force = false;
587
588    // are we entering or starting a call
589    if (!isStateInCall(oldState) && isStateInCall(state)) {
590        ALOGV("  Entering call in setPhoneState()");
591        // force routing command to audio hardware when starting a call
592        // even if no device change is needed
593        force = true;
594        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
595            mStreams[AUDIO_STREAM_DTMF].mVolumeCurve[j] =
596                    sVolumeProfiles[AUDIO_STREAM_VOICE_CALL][j];
597        }
598    } else if (isStateInCall(oldState) && !isStateInCall(state)) {
599        ALOGV("  Exiting call in setPhoneState()");
600        // force routing command to audio hardware when exiting a call
601        // even if no device change is needed
602        force = true;
603        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
604            mStreams[AUDIO_STREAM_DTMF].mVolumeCurve[j] =
605                    sVolumeProfiles[AUDIO_STREAM_DTMF][j];
606        }
607    } else if (isStateInCall(state) && (state != oldState)) {
608        ALOGV("  Switching between telephony and VoIP in setPhoneState()");
609        // force routing command to audio hardware when switching between telephony and VoIP
610        // even if no device change is needed
611        force = true;
612    }
613
614    // check for device and output changes triggered by new phone state
615    checkA2dpSuspend();
616    checkOutputForAllStrategies();
617    updateDevicesAndOutputs();
618
619    sp<AudioOutputDescriptor> hwOutputDesc = mOutputs.valueFor(mPrimaryOutput);
620
621    int delayMs = 0;
622    if (isStateInCall(state)) {
623        nsecs_t sysTime = systemTime();
624        for (size_t i = 0; i < mOutputs.size(); i++) {
625            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
626            // mute media and sonification strategies and delay device switch by the largest
627            // latency of any output where either strategy is active.
628            // This avoid sending the ring tone or music tail into the earpiece or headset.
629            if ((desc->isStrategyActive(STRATEGY_MEDIA,
630                                     SONIFICATION_HEADSET_MUSIC_DELAY,
631                                     sysTime) ||
632                    desc->isStrategyActive(STRATEGY_SONIFICATION,
633                                         SONIFICATION_HEADSET_MUSIC_DELAY,
634                                         sysTime)) &&
635                    (delayMs < (int)desc->mLatency*2)) {
636                delayMs = desc->mLatency*2;
637            }
638            setStrategyMute(STRATEGY_MEDIA, true, mOutputs.keyAt(i));
639            setStrategyMute(STRATEGY_MEDIA, false, mOutputs.keyAt(i), MUTE_TIME_MS,
640                getDeviceForStrategy(STRATEGY_MEDIA, true /*fromCache*/));
641            setStrategyMute(STRATEGY_SONIFICATION, true, mOutputs.keyAt(i));
642            setStrategyMute(STRATEGY_SONIFICATION, false, mOutputs.keyAt(i), MUTE_TIME_MS,
643                getDeviceForStrategy(STRATEGY_SONIFICATION, true /*fromCache*/));
644        }
645    }
646
647    // Note that despite the fact that getNewOutputDevice() is called on the primary output,
648    // the device returned is not necessarily reachable via this output
649    audio_devices_t rxDevice = getNewOutputDevice(mPrimaryOutput, false /*fromCache*/);
650    // force routing command to audio hardware when ending call
651    // even if no device change is needed
652    if (isStateInCall(oldState) && rxDevice == AUDIO_DEVICE_NONE) {
653        rxDevice = hwOutputDesc->device();
654    }
655
656    if (state == AUDIO_MODE_IN_CALL) {
657        updateCallRouting(rxDevice, delayMs);
658    } else if (oldState == AUDIO_MODE_IN_CALL) {
659        if (mCallRxPatch != 0) {
660            mpClientInterface->releaseAudioPatch(mCallRxPatch->mAfPatchHandle, 0);
661            mCallRxPatch.clear();
662        }
663        if (mCallTxPatch != 0) {
664            mpClientInterface->releaseAudioPatch(mCallTxPatch->mAfPatchHandle, 0);
665            mCallTxPatch.clear();
666        }
667        setOutputDevice(mPrimaryOutput, rxDevice, force, 0);
668    } else {
669        setOutputDevice(mPrimaryOutput, rxDevice, force, 0);
670    }
671    // if entering in call state, handle special case of active streams
672    // pertaining to sonification strategy see handleIncallSonification()
673    if (isStateInCall(state)) {
674        ALOGV("setPhoneState() in call state management: new state is %d", state);
675        for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
676            handleIncallSonification((audio_stream_type_t)stream, true, true);
677        }
678    }
679
680    // Flag that ringtone volume must be limited to music volume until we exit MODE_RINGTONE
681    if (state == AUDIO_MODE_RINGTONE &&
682        isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY)) {
683        mLimitRingtoneVolume = true;
684    } else {
685        mLimitRingtoneVolume = false;
686    }
687}
688
689void AudioPolicyManager::setForceUse(audio_policy_force_use_t usage,
690                                         audio_policy_forced_cfg_t config)
691{
692    ALOGV("setForceUse() usage %d, config %d, mPhoneState %d", usage, config, mPhoneState);
693
694    bool forceVolumeReeval = false;
695    switch(usage) {
696    case AUDIO_POLICY_FORCE_FOR_COMMUNICATION:
697        if (config != AUDIO_POLICY_FORCE_SPEAKER && config != AUDIO_POLICY_FORCE_BT_SCO &&
698            config != AUDIO_POLICY_FORCE_NONE) {
699            ALOGW("setForceUse() invalid config %d for FOR_COMMUNICATION", config);
700            return;
701        }
702        forceVolumeReeval = true;
703        mForceUse[usage] = config;
704        break;
705    case AUDIO_POLICY_FORCE_FOR_MEDIA:
706        if (config != AUDIO_POLICY_FORCE_HEADPHONES && config != AUDIO_POLICY_FORCE_BT_A2DP &&
707            config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
708            config != AUDIO_POLICY_FORCE_ANALOG_DOCK &&
709            config != AUDIO_POLICY_FORCE_DIGITAL_DOCK && config != AUDIO_POLICY_FORCE_NONE &&
710            config != AUDIO_POLICY_FORCE_NO_BT_A2DP) {
711            ALOGW("setForceUse() invalid config %d for FOR_MEDIA", config);
712            return;
713        }
714        mForceUse[usage] = config;
715        break;
716    case AUDIO_POLICY_FORCE_FOR_RECORD:
717        if (config != AUDIO_POLICY_FORCE_BT_SCO && config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
718            config != AUDIO_POLICY_FORCE_NONE) {
719            ALOGW("setForceUse() invalid config %d for FOR_RECORD", config);
720            return;
721        }
722        mForceUse[usage] = config;
723        break;
724    case AUDIO_POLICY_FORCE_FOR_DOCK:
725        if (config != AUDIO_POLICY_FORCE_NONE && config != AUDIO_POLICY_FORCE_BT_CAR_DOCK &&
726            config != AUDIO_POLICY_FORCE_BT_DESK_DOCK &&
727            config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
728            config != AUDIO_POLICY_FORCE_ANALOG_DOCK &&
729            config != AUDIO_POLICY_FORCE_DIGITAL_DOCK) {
730            ALOGW("setForceUse() invalid config %d for FOR_DOCK", config);
731        }
732        forceVolumeReeval = true;
733        mForceUse[usage] = config;
734        break;
735    case AUDIO_POLICY_FORCE_FOR_SYSTEM:
736        if (config != AUDIO_POLICY_FORCE_NONE &&
737            config != AUDIO_POLICY_FORCE_SYSTEM_ENFORCED) {
738            ALOGW("setForceUse() invalid config %d for FOR_SYSTEM", config);
739        }
740        forceVolumeReeval = true;
741        mForceUse[usage] = config;
742        break;
743    case AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO:
744        if (config != AUDIO_POLICY_FORCE_NONE &&
745            config != AUDIO_POLICY_FORCE_HDMI_SYSTEM_AUDIO_ENFORCED) {
746            ALOGW("setForceUse() invalid config %d forHDMI_SYSTEM_AUDIO", config);
747        }
748        mForceUse[usage] = config;
749        break;
750    default:
751        ALOGW("setForceUse() invalid usage %d", usage);
752        break;
753    }
754
755    // check for device and output changes triggered by new force usage
756    checkA2dpSuspend();
757    checkOutputForAllStrategies();
758    updateDevicesAndOutputs();
759    if (mPhoneState == AUDIO_MODE_IN_CALL) {
760        audio_devices_t newDevice = getNewOutputDevice(mPrimaryOutput, true /*fromCache*/);
761        updateCallRouting(newDevice);
762    }
763    for (size_t i = 0; i < mOutputs.size(); i++) {
764        audio_io_handle_t output = mOutputs.keyAt(i);
765        audio_devices_t newDevice = getNewOutputDevice(output, true /*fromCache*/);
766        if ((mPhoneState != AUDIO_MODE_IN_CALL) || (output != mPrimaryOutput)) {
767            setOutputDevice(output, newDevice, (newDevice != AUDIO_DEVICE_NONE));
768        }
769        if (forceVolumeReeval && (newDevice != AUDIO_DEVICE_NONE)) {
770            applyStreamVolumes(output, newDevice, 0, true);
771        }
772    }
773
774    audio_io_handle_t activeInput = getActiveInput();
775    if (activeInput != 0) {
776        setInputDevice(activeInput, getNewInputDevice(activeInput));
777    }
778
779}
780
781audio_policy_forced_cfg_t AudioPolicyManager::getForceUse(audio_policy_force_use_t usage)
782{
783    return mForceUse[usage];
784}
785
786void AudioPolicyManager::setSystemProperty(const char* property, const char* value)
787{
788    ALOGV("setSystemProperty() property %s, value %s", property, value);
789}
790
791// Find a direct output profile compatible with the parameters passed, even if the input flags do
792// not explicitly request a direct output
793sp<AudioPolicyManager::IOProfile> AudioPolicyManager::getProfileForDirectOutput(
794                                                               audio_devices_t device,
795                                                               uint32_t samplingRate,
796                                                               audio_format_t format,
797                                                               audio_channel_mask_t channelMask,
798                                                               audio_output_flags_t flags)
799{
800    for (size_t i = 0; i < mHwModules.size(); i++) {
801        if (mHwModules[i]->mHandle == 0) {
802            continue;
803        }
804        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++) {
805            sp<IOProfile> profile = mHwModules[i]->mOutputProfiles[j];
806            bool found = profile->isCompatibleProfile(device, samplingRate,
807                    NULL /*updatedSamplingRate*/, format, channelMask,
808                    flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD ?
809                        AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD : AUDIO_OUTPUT_FLAG_DIRECT);
810            if (found && (mAvailableOutputDevices.types() & profile->mSupportedDevices.types())) {
811                return profile;
812            }
813        }
814    }
815    return 0;
816}
817
818audio_io_handle_t AudioPolicyManager::getOutput(audio_stream_type_t stream,
819                                    uint32_t samplingRate,
820                                    audio_format_t format,
821                                    audio_channel_mask_t channelMask,
822                                    audio_output_flags_t flags,
823                                    const audio_offload_info_t *offloadInfo)
824{
825
826    routing_strategy strategy = getStrategy(stream);
827    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
828    ALOGV("getOutput() device %d, stream %d, samplingRate %d, format %x, channelMask %x, flags %x",
829          device, stream, samplingRate, format, channelMask, flags);
830
831    return getOutputForDevice(device, stream, samplingRate,format, channelMask, flags,
832            offloadInfo);
833}
834
835audio_io_handle_t AudioPolicyManager::getOutputForAttr(const audio_attributes_t *attr,
836                                    uint32_t samplingRate,
837                                    audio_format_t format,
838                                    audio_channel_mask_t channelMask,
839                                    audio_output_flags_t flags,
840                                    const audio_offload_info_t *offloadInfo)
841{
842    if (attr == NULL) {
843        ALOGE("getOutputForAttr() called with NULL audio attributes");
844        return 0;
845    }
846    ALOGV("getOutputForAttr() usage=%d, content=%d, tag=%s flags=%08x",
847            attr->usage, attr->content_type, attr->tags, attr->flags);
848
849    // TODO this is where filtering for custom policies (rerouting, dynamic sources) will go
850    routing_strategy strategy = (routing_strategy) getStrategyForAttr(attr);
851    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
852
853    if ((attr->flags & AUDIO_FLAG_HW_AV_SYNC) != 0) {
854        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_HW_AV_SYNC);
855    }
856
857    ALOGV("getOutputForAttr() device %d, samplingRate %d, format %x, channelMask %x, flags %x",
858          device, samplingRate, format, channelMask, flags);
859
860    audio_stream_type_t stream = streamTypefromAttributesInt(attr);
861    return getOutputForDevice(device, stream, samplingRate, format, channelMask, flags,
862                offloadInfo);
863}
864
865audio_io_handle_t AudioPolicyManager::getOutputForDevice(
866        audio_devices_t device,
867        audio_stream_type_t stream,
868        uint32_t samplingRate,
869        audio_format_t format,
870        audio_channel_mask_t channelMask,
871        audio_output_flags_t flags,
872        const audio_offload_info_t *offloadInfo)
873{
874    audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
875    uint32_t latency = 0;
876    status_t status;
877
878#ifdef AUDIO_POLICY_TEST
879    if (mCurOutput != 0) {
880        ALOGV("getOutput() test output mCurOutput %d, samplingRate %d, format %d, channelMask %x, mDirectOutput %d",
881                mCurOutput, mTestSamplingRate, mTestFormat, mTestChannels, mDirectOutput);
882
883        if (mTestOutputs[mCurOutput] == 0) {
884            ALOGV("getOutput() opening test output");
885            sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(NULL);
886            outputDesc->mDevice = mTestDevice;
887            outputDesc->mLatency = mTestLatencyMs;
888            outputDesc->mFlags =
889                    (audio_output_flags_t)(mDirectOutput ? AUDIO_OUTPUT_FLAG_DIRECT : 0);
890            outputDesc->mRefCount[stream] = 0;
891            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
892            config.sample_rate = mTestSamplingRate;
893            config.channel_mask = mTestChannels;
894            config.format = mTestFormat;
895            if (offloadInfo != NULL) {
896                config.offload_info = *offloadInfo;
897            }
898            status = mpClientInterface->openOutput(0,
899                                                  &mTestOutputs[mCurOutput],
900                                                  &config,
901                                                  &outputDesc->mDevice,
902                                                  String8(""),
903                                                  &outputDesc->mLatency,
904                                                  outputDesc->mFlags);
905            if (status == NO_ERROR) {
906                outputDesc->mSamplingRate = config.sample_rate;
907                outputDesc->mFormat = config.format;
908                outputDesc->mChannelMask = config.channel_mask;
909                AudioParameter outputCmd = AudioParameter();
910                outputCmd.addInt(String8("set_id"),mCurOutput);
911                mpClientInterface->setParameters(mTestOutputs[mCurOutput],outputCmd.toString());
912                addOutput(mTestOutputs[mCurOutput], outputDesc);
913            }
914        }
915        return mTestOutputs[mCurOutput];
916    }
917#endif //AUDIO_POLICY_TEST
918
919    // open a direct output if required by specified parameters
920    //force direct flag if offload flag is set: offloading implies a direct output stream
921    // and all common behaviors are driven by checking only the direct flag
922    // this should normally be set appropriately in the policy configuration file
923    if ((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
924        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_DIRECT);
925    }
926    if ((flags & AUDIO_OUTPUT_FLAG_HW_AV_SYNC) != 0) {
927        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_DIRECT);
928    }
929    if (mForceDeepBufferForMedia && (flags & AUDIO_OUTPUT_FLAG_DIRECT) == 0 &&
930            stream == AUDIO_STREAM_MUSIC) {
931        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_DEEP_BUFFER);
932    }
933
934    sp<IOProfile> profile;
935
936    // skip direct output selection if the request can obviously be attached to a mixed output
937    // and not explicitly requested
938    if (((flags & AUDIO_OUTPUT_FLAG_DIRECT) == 0) &&
939            audio_is_linear_pcm(format) && samplingRate <= MAX_MIXER_SAMPLING_RATE &&
940            audio_channel_count_from_out_mask(channelMask) <= 2) {
941        goto non_direct_output;
942    }
943
944    // Do not allow offloading if one non offloadable effect is enabled. This prevents from
945    // creating an offloaded track and tearing it down immediately after start when audioflinger
946    // detects there is an active non offloadable effect.
947    // FIXME: We should check the audio session here but we do not have it in this context.
948    // This may prevent offloading in rare situations where effects are left active by apps
949    // in the background.
950
951    if (((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) == 0) ||
952            !isNonOffloadableEffectEnabled()) {
953        profile = getProfileForDirectOutput(device,
954                                           samplingRate,
955                                           format,
956                                           channelMask,
957                                           (audio_output_flags_t)flags);
958    }
959
960    if (profile != 0) {
961        sp<AudioOutputDescriptor> outputDesc = NULL;
962
963        for (size_t i = 0; i < mOutputs.size(); i++) {
964            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
965            if (!desc->isDuplicated() && (profile == desc->mProfile)) {
966                outputDesc = desc;
967                // reuse direct output if currently open and configured with same parameters
968                if ((samplingRate == outputDesc->mSamplingRate) &&
969                        (format == outputDesc->mFormat) &&
970                        (channelMask == outputDesc->mChannelMask)) {
971                    outputDesc->mDirectOpenCount++;
972                    ALOGV("getOutput() reusing direct output %d", mOutputs.keyAt(i));
973                    return mOutputs.keyAt(i);
974                }
975            }
976        }
977        // close direct output if currently open and configured with different parameters
978        if (outputDesc != NULL) {
979            closeOutput(outputDesc->mIoHandle);
980        }
981        outputDesc = new AudioOutputDescriptor(profile);
982        outputDesc->mDevice = device;
983        outputDesc->mLatency = 0;
984        outputDesc->mFlags =(audio_output_flags_t) (outputDesc->mFlags | flags);
985        audio_config_t config = AUDIO_CONFIG_INITIALIZER;
986        config.sample_rate = samplingRate;
987        config.channel_mask = channelMask;
988        config.format = format;
989        if (offloadInfo != NULL) {
990            config.offload_info = *offloadInfo;
991        }
992        status = mpClientInterface->openOutput(profile->mModule->mHandle,
993                                               &output,
994                                               &config,
995                                               &outputDesc->mDevice,
996                                               String8(""),
997                                               &outputDesc->mLatency,
998                                               outputDesc->mFlags);
999
1000        // only accept an output with the requested parameters
1001        if (status != NO_ERROR ||
1002            (samplingRate != 0 && samplingRate != config.sample_rate) ||
1003            (format != AUDIO_FORMAT_DEFAULT && format != config.format) ||
1004            (channelMask != 0 && channelMask != config.channel_mask)) {
1005            ALOGV("getOutput() failed opening direct output: output %d samplingRate %d %d,"
1006                    "format %d %d, channelMask %04x %04x", output, samplingRate,
1007                    outputDesc->mSamplingRate, format, outputDesc->mFormat, channelMask,
1008                    outputDesc->mChannelMask);
1009            if (output != AUDIO_IO_HANDLE_NONE) {
1010                mpClientInterface->closeOutput(output);
1011            }
1012            return AUDIO_IO_HANDLE_NONE;
1013        }
1014        outputDesc->mSamplingRate = config.sample_rate;
1015        outputDesc->mChannelMask = config.channel_mask;
1016        outputDesc->mFormat = config.format;
1017        outputDesc->mRefCount[stream] = 0;
1018        outputDesc->mStopTime[stream] = 0;
1019        outputDesc->mDirectOpenCount = 1;
1020
1021        audio_io_handle_t srcOutput = getOutputForEffect();
1022        addOutput(output, outputDesc);
1023        audio_io_handle_t dstOutput = getOutputForEffect();
1024        if (dstOutput == output) {
1025            mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, srcOutput, dstOutput);
1026        }
1027        mPreviousOutputs = mOutputs;
1028        ALOGV("getOutput() returns new direct output %d", output);
1029        mpClientInterface->onAudioPortListUpdate();
1030        return output;
1031    }
1032
1033non_direct_output:
1034
1035    // ignoring channel mask due to downmix capability in mixer
1036
1037    // open a non direct output
1038
1039    // for non direct outputs, only PCM is supported
1040    if (audio_is_linear_pcm(format)) {
1041        // get which output is suitable for the specified stream. The actual
1042        // routing change will happen when startOutput() will be called
1043        SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(device, mOutputs);
1044
1045        // at this stage we should ignore the DIRECT flag as no direct output could be found earlier
1046        flags = (audio_output_flags_t)(flags & ~AUDIO_OUTPUT_FLAG_DIRECT);
1047        output = selectOutput(outputs, flags, format);
1048    }
1049    ALOGW_IF((output == 0), "getOutput() could not find output for stream %d, samplingRate %d,"
1050            "format %d, channels %x, flags %x", stream, samplingRate, format, channelMask, flags);
1051
1052    ALOGV("getOutput() returns output %d", output);
1053
1054    return output;
1055}
1056
1057audio_io_handle_t AudioPolicyManager::selectOutput(const SortedVector<audio_io_handle_t>& outputs,
1058                                                       audio_output_flags_t flags,
1059                                                       audio_format_t format)
1060{
1061    // select one output among several that provide a path to a particular device or set of
1062    // devices (the list was previously build by getOutputsForDevice()).
1063    // The priority is as follows:
1064    // 1: the output with the highest number of requested policy flags
1065    // 2: the primary output
1066    // 3: the first output in the list
1067
1068    if (outputs.size() == 0) {
1069        return 0;
1070    }
1071    if (outputs.size() == 1) {
1072        return outputs[0];
1073    }
1074
1075    int maxCommonFlags = 0;
1076    audio_io_handle_t outputFlags = 0;
1077    audio_io_handle_t outputPrimary = 0;
1078
1079    for (size_t i = 0; i < outputs.size(); i++) {
1080        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(outputs[i]);
1081        if (!outputDesc->isDuplicated()) {
1082            // if a valid format is specified, skip output if not compatible
1083            if (format != AUDIO_FORMAT_INVALID) {
1084                if (outputDesc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) {
1085                    if (format != outputDesc->mFormat) {
1086                        continue;
1087                    }
1088                } else if (!audio_is_linear_pcm(format)) {
1089                    continue;
1090                }
1091            }
1092
1093            int commonFlags = popcount(outputDesc->mProfile->mFlags & flags);
1094            if (commonFlags > maxCommonFlags) {
1095                outputFlags = outputs[i];
1096                maxCommonFlags = commonFlags;
1097                ALOGV("selectOutput() commonFlags for output %d, %04x", outputs[i], commonFlags);
1098            }
1099            if (outputDesc->mProfile->mFlags & AUDIO_OUTPUT_FLAG_PRIMARY) {
1100                outputPrimary = outputs[i];
1101            }
1102        }
1103    }
1104
1105    if (outputFlags != 0) {
1106        return outputFlags;
1107    }
1108    if (outputPrimary != 0) {
1109        return outputPrimary;
1110    }
1111
1112    return outputs[0];
1113}
1114
1115status_t AudioPolicyManager::startOutput(audio_io_handle_t output,
1116                                             audio_stream_type_t stream,
1117                                             int session)
1118{
1119    ALOGV("startOutput() output %d, stream %d, session %d", output, stream, session);
1120    ssize_t index = mOutputs.indexOfKey(output);
1121    if (index < 0) {
1122        ALOGW("startOutput() unknown output %d", output);
1123        return BAD_VALUE;
1124    }
1125
1126    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1127
1128    // increment usage count for this stream on the requested output:
1129    // NOTE that the usage count is the same for duplicated output and hardware output which is
1130    // necessary for a correct control of hardware output routing by startOutput() and stopOutput()
1131    outputDesc->changeRefCount(stream, 1);
1132
1133    if (outputDesc->mRefCount[stream] == 1) {
1134        audio_devices_t newDevice = getNewOutputDevice(output, false /*fromCache*/);
1135        routing_strategy strategy = getStrategy(stream);
1136        bool shouldWait = (strategy == STRATEGY_SONIFICATION) ||
1137                            (strategy == STRATEGY_SONIFICATION_RESPECTFUL);
1138        uint32_t waitMs = 0;
1139        bool force = false;
1140        for (size_t i = 0; i < mOutputs.size(); i++) {
1141            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
1142            if (desc != outputDesc) {
1143                // force a device change if any other output is managed by the same hw
1144                // module and has a current device selection that differs from selected device.
1145                // In this case, the audio HAL must receive the new device selection so that it can
1146                // change the device currently selected by the other active output.
1147                if (outputDesc->sharesHwModuleWith(desc) &&
1148                    desc->device() != newDevice) {
1149                    force = true;
1150                }
1151                // wait for audio on other active outputs to be presented when starting
1152                // a notification so that audio focus effect can propagate.
1153                uint32_t latency = desc->latency();
1154                if (shouldWait && desc->isActive(latency * 2) && (waitMs < latency)) {
1155                    waitMs = latency;
1156                }
1157            }
1158        }
1159        uint32_t muteWaitMs = setOutputDevice(output, newDevice, force);
1160
1161        // handle special case for sonification while in call
1162        if (isInCall()) {
1163            handleIncallSonification(stream, true, false);
1164        }
1165
1166        // apply volume rules for current stream and device if necessary
1167        checkAndSetVolume(stream,
1168                          mStreams[stream].getVolumeIndex(newDevice),
1169                          output,
1170                          newDevice);
1171
1172        // update the outputs if starting an output with a stream that can affect notification
1173        // routing
1174        handleNotificationRoutingForStream(stream);
1175        if (waitMs > muteWaitMs) {
1176            usleep((waitMs - muteWaitMs) * 2 * 1000);
1177        }
1178    }
1179    return NO_ERROR;
1180}
1181
1182
1183status_t AudioPolicyManager::stopOutput(audio_io_handle_t output,
1184                                            audio_stream_type_t stream,
1185                                            int session)
1186{
1187    ALOGV("stopOutput() output %d, stream %d, session %d", output, stream, session);
1188    ssize_t index = mOutputs.indexOfKey(output);
1189    if (index < 0) {
1190        ALOGW("stopOutput() unknown output %d", output);
1191        return BAD_VALUE;
1192    }
1193
1194    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1195
1196    // handle special case for sonification while in call
1197    if (isInCall()) {
1198        handleIncallSonification(stream, false, false);
1199    }
1200
1201    if (outputDesc->mRefCount[stream] > 0) {
1202        // decrement usage count of this stream on the output
1203        outputDesc->changeRefCount(stream, -1);
1204        // store time at which the stream was stopped - see isStreamActive()
1205        if (outputDesc->mRefCount[stream] == 0) {
1206            outputDesc->mStopTime[stream] = systemTime();
1207            audio_devices_t newDevice = getNewOutputDevice(output, false /*fromCache*/);
1208            // delay the device switch by twice the latency because stopOutput() is executed when
1209            // the track stop() command is received and at that time the audio track buffer can
1210            // still contain data that needs to be drained. The latency only covers the audio HAL
1211            // and kernel buffers. Also the latency does not always include additional delay in the
1212            // audio path (audio DSP, CODEC ...)
1213            setOutputDevice(output, newDevice, false, outputDesc->mLatency*2);
1214
1215            // force restoring the device selection on other active outputs if it differs from the
1216            // one being selected for this output
1217            for (size_t i = 0; i < mOutputs.size(); i++) {
1218                audio_io_handle_t curOutput = mOutputs.keyAt(i);
1219                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
1220                if (curOutput != output &&
1221                        desc->isActive() &&
1222                        outputDesc->sharesHwModuleWith(desc) &&
1223                        (newDevice != desc->device())) {
1224                    setOutputDevice(curOutput,
1225                                    getNewOutputDevice(curOutput, false /*fromCache*/),
1226                                    true,
1227                                    outputDesc->mLatency*2);
1228                }
1229            }
1230            // update the outputs if stopping one with a stream that can affect notification routing
1231            handleNotificationRoutingForStream(stream);
1232        }
1233        return NO_ERROR;
1234    } else {
1235        ALOGW("stopOutput() refcount is already 0 for output %d", output);
1236        return INVALID_OPERATION;
1237    }
1238}
1239
1240void AudioPolicyManager::releaseOutput(audio_io_handle_t output)
1241{
1242    ALOGV("releaseOutput() %d", output);
1243    ssize_t index = mOutputs.indexOfKey(output);
1244    if (index < 0) {
1245        ALOGW("releaseOutput() releasing unknown output %d", output);
1246        return;
1247    }
1248
1249#ifdef AUDIO_POLICY_TEST
1250    int testIndex = testOutputIndex(output);
1251    if (testIndex != 0) {
1252        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1253        if (outputDesc->isActive()) {
1254            mpClientInterface->closeOutput(output);
1255            mOutputs.removeItem(output);
1256            mTestOutputs[testIndex] = 0;
1257        }
1258        return;
1259    }
1260#endif //AUDIO_POLICY_TEST
1261
1262    sp<AudioOutputDescriptor> desc = mOutputs.valueAt(index);
1263    if (desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) {
1264        if (desc->mDirectOpenCount <= 0) {
1265            ALOGW("releaseOutput() invalid open count %d for output %d",
1266                                                              desc->mDirectOpenCount, output);
1267            return;
1268        }
1269        if (--desc->mDirectOpenCount == 0) {
1270            closeOutput(output);
1271            // If effects where present on the output, audioflinger moved them to the primary
1272            // output by default: move them back to the appropriate output.
1273            audio_io_handle_t dstOutput = getOutputForEffect();
1274            if (dstOutput != mPrimaryOutput) {
1275                mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, mPrimaryOutput, dstOutput);
1276            }
1277            mpClientInterface->onAudioPortListUpdate();
1278        }
1279    }
1280}
1281
1282
1283audio_io_handle_t AudioPolicyManager::getInput(audio_source_t inputSource,
1284                                    uint32_t samplingRate,
1285                                    audio_format_t format,
1286                                    audio_channel_mask_t channelMask,
1287                                    audio_session_t session,
1288                                    audio_input_flags_t flags)
1289{
1290    ALOGV("getInput() inputSource %d, samplingRate %d, format %d, channelMask %x, session %d, "
1291          "flags %#x",
1292          inputSource, samplingRate, format, channelMask, session, flags);
1293
1294    audio_devices_t device = getDeviceForInputSource(inputSource);
1295
1296    if (device == AUDIO_DEVICE_NONE) {
1297        ALOGW("getInput() could not find device for inputSource %d", inputSource);
1298        return AUDIO_IO_HANDLE_NONE;
1299    }
1300
1301    // adapt channel selection to input source
1302    switch (inputSource) {
1303    case AUDIO_SOURCE_VOICE_UPLINK:
1304        channelMask = AUDIO_CHANNEL_IN_VOICE_UPLINK;
1305        break;
1306    case AUDIO_SOURCE_VOICE_DOWNLINK:
1307        channelMask = AUDIO_CHANNEL_IN_VOICE_DNLINK;
1308        break;
1309    case AUDIO_SOURCE_VOICE_CALL:
1310        channelMask = AUDIO_CHANNEL_IN_VOICE_UPLINK | AUDIO_CHANNEL_IN_VOICE_DNLINK;
1311        break;
1312    default:
1313        break;
1314    }
1315
1316    audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
1317    bool isSoundTrigger = false;
1318    audio_source_t halInputSource = inputSource;
1319    if (inputSource == AUDIO_SOURCE_HOTWORD) {
1320        ssize_t index = mSoundTriggerSessions.indexOfKey(session);
1321        if (index >= 0) {
1322            input = mSoundTriggerSessions.valueFor(session);
1323            isSoundTrigger = true;
1324            flags = (audio_input_flags_t)(flags | AUDIO_INPUT_FLAG_HW_HOTWORD);
1325            ALOGV("SoundTrigger capture on session %d input %d", session, input);
1326        } else {
1327            halInputSource = AUDIO_SOURCE_VOICE_RECOGNITION;
1328        }
1329    }
1330
1331    sp<IOProfile> profile = getInputProfile(device,
1332                                         samplingRate,
1333                                         format,
1334                                         channelMask,
1335                                         flags);
1336    if (profile == 0) {
1337        //retry without flags
1338        audio_input_flags_t log_flags = flags;
1339        flags = AUDIO_INPUT_FLAG_NONE;
1340        profile = getInputProfile(device,
1341                                 samplingRate,
1342                                 format,
1343                                 channelMask,
1344                                 flags);
1345        if (profile == 0) {
1346            ALOGW("getInput() could not find profile for device 0x%X, samplingRate %u, format %#x, "
1347                    "channelMask 0x%X, flags %#x",
1348                    device, samplingRate, format, channelMask, log_flags);
1349            return AUDIO_IO_HANDLE_NONE;
1350        }
1351    }
1352
1353    if (profile->mModule->mHandle == 0) {
1354        ALOGE("getInput(): HW module %s not opened", profile->mModule->mName);
1355        return AUDIO_IO_HANDLE_NONE;
1356    }
1357
1358    audio_config_t config = AUDIO_CONFIG_INITIALIZER;
1359    config.sample_rate = samplingRate;
1360    config.channel_mask = channelMask;
1361    config.format = format;
1362
1363    status_t status = mpClientInterface->openInput(profile->mModule->mHandle,
1364                                                   &input,
1365                                                   &config,
1366                                                   &device,
1367                                                   String8(""),
1368                                                   halInputSource,
1369                                                   flags);
1370
1371    // only accept input with the exact requested set of parameters
1372    if (status != NO_ERROR ||
1373        (samplingRate != config.sample_rate) ||
1374        (format != config.format) ||
1375        (channelMask != config.channel_mask)) {
1376        ALOGW("getInput() failed opening input: samplingRate %d, format %d, channelMask %x",
1377                samplingRate, format, channelMask);
1378        if (input != AUDIO_IO_HANDLE_NONE) {
1379            mpClientInterface->closeInput(input);
1380        }
1381        return AUDIO_IO_HANDLE_NONE;
1382    }
1383
1384    sp<AudioInputDescriptor> inputDesc = new AudioInputDescriptor(profile);
1385    inputDesc->mInputSource = inputSource;
1386    inputDesc->mRefCount = 0;
1387    inputDesc->mOpenRefCount = 1;
1388    inputDesc->mSamplingRate = samplingRate;
1389    inputDesc->mFormat = format;
1390    inputDesc->mChannelMask = channelMask;
1391    inputDesc->mDevice = device;
1392    inputDesc->mSessions.add(session);
1393    inputDesc->mIsSoundTrigger = isSoundTrigger;
1394
1395    addInput(input, inputDesc);
1396    mpClientInterface->onAudioPortListUpdate();
1397    return input;
1398}
1399
1400status_t AudioPolicyManager::startInput(audio_io_handle_t input,
1401                                        audio_session_t session)
1402{
1403    ALOGV("startInput() input %d", input);
1404    ssize_t index = mInputs.indexOfKey(input);
1405    if (index < 0) {
1406        ALOGW("startInput() unknown input %d", input);
1407        return BAD_VALUE;
1408    }
1409    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1410
1411    index = inputDesc->mSessions.indexOf(session);
1412    if (index < 0) {
1413        ALOGW("startInput() unknown session %d on input %d", session, input);
1414        return BAD_VALUE;
1415    }
1416
1417    // virtual input devices are compatible with other input devices
1418    if (!isVirtualInputDevice(inputDesc->mDevice)) {
1419
1420        // for a non-virtual input device, check if there is another (non-virtual) active input
1421        audio_io_handle_t activeInput = getActiveInput();
1422        if (activeInput != 0 && activeInput != input) {
1423
1424            // If the already active input uses AUDIO_SOURCE_HOTWORD then it is closed,
1425            // otherwise the active input continues and the new input cannot be started.
1426            sp<AudioInputDescriptor> activeDesc = mInputs.valueFor(activeInput);
1427            if (activeDesc->mInputSource == AUDIO_SOURCE_HOTWORD) {
1428                ALOGW("startInput(%d) preempting low-priority input %d", input, activeInput);
1429                stopInput(activeInput, activeDesc->mSessions.itemAt(0));
1430                releaseInput(activeInput, activeDesc->mSessions.itemAt(0));
1431            } else {
1432                ALOGE("startInput(%d) failed: other input %d already started", input, activeInput);
1433                return INVALID_OPERATION;
1434            }
1435        }
1436    }
1437
1438    if (inputDesc->mRefCount == 0) {
1439        if (activeInputsCount() == 0) {
1440            SoundTrigger::setCaptureState(true);
1441        }
1442        setInputDevice(input, getNewInputDevice(input), true /* force */);
1443
1444        // Automatically enable the remote submix output when input is started.
1445        // For remote submix (a virtual device), we open only one input per capture request.
1446        if (audio_is_remote_submix_device(inputDesc->mDevice)) {
1447            setDeviceConnectionState(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
1448                    AUDIO_POLICY_DEVICE_STATE_AVAILABLE, AUDIO_REMOTE_SUBMIX_DEVICE_ADDRESS);
1449        }
1450    }
1451
1452    ALOGV("AudioPolicyManager::startInput() input source = %d", inputDesc->mInputSource);
1453
1454    inputDesc->mRefCount++;
1455    return NO_ERROR;
1456}
1457
1458status_t AudioPolicyManager::stopInput(audio_io_handle_t input,
1459                                       audio_session_t session)
1460{
1461    ALOGV("stopInput() input %d", input);
1462    ssize_t index = mInputs.indexOfKey(input);
1463    if (index < 0) {
1464        ALOGW("stopInput() unknown input %d", input);
1465        return BAD_VALUE;
1466    }
1467    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1468
1469    index = inputDesc->mSessions.indexOf(session);
1470    if (index < 0) {
1471        ALOGW("stopInput() unknown session %d on input %d", session, input);
1472        return BAD_VALUE;
1473    }
1474
1475    if (inputDesc->mRefCount == 0) {
1476        ALOGW("stopInput() input %d already stopped", input);
1477        return INVALID_OPERATION;
1478    }
1479
1480    inputDesc->mRefCount--;
1481    if (inputDesc->mRefCount == 0) {
1482
1483        // automatically disable the remote submix output when input is stopped
1484        if (audio_is_remote_submix_device(inputDesc->mDevice)) {
1485            setDeviceConnectionState(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
1486                    AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE, AUDIO_REMOTE_SUBMIX_DEVICE_ADDRESS);
1487        }
1488
1489        resetInputDevice(input);
1490
1491        if (activeInputsCount() == 0) {
1492            SoundTrigger::setCaptureState(false);
1493        }
1494    }
1495    return NO_ERROR;
1496}
1497
1498void AudioPolicyManager::releaseInput(audio_io_handle_t input,
1499                                      audio_session_t session)
1500{
1501    ALOGV("releaseInput() %d", input);
1502    ssize_t index = mInputs.indexOfKey(input);
1503    if (index < 0) {
1504        ALOGW("releaseInput() releasing unknown input %d", input);
1505        return;
1506    }
1507    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1508    ALOG_ASSERT(inputDesc != 0);
1509
1510    index = inputDesc->mSessions.indexOf(session);
1511    if (index < 0) {
1512        ALOGW("releaseInput() unknown session %d on input %d", session, input);
1513        return;
1514    }
1515    inputDesc->mSessions.remove(session);
1516    if (inputDesc->mOpenRefCount == 0) {
1517        ALOGW("releaseInput() invalid open ref count %d", inputDesc->mOpenRefCount);
1518        return;
1519    }
1520    inputDesc->mOpenRefCount--;
1521    if (inputDesc->mOpenRefCount > 0) {
1522        ALOGV("releaseInput() exit > 0");
1523        return;
1524    }
1525
1526    closeInput(input);
1527    mpClientInterface->onAudioPortListUpdate();
1528    ALOGV("releaseInput() exit");
1529}
1530
1531void AudioPolicyManager::closeAllInputs() {
1532    bool patchRemoved = false;
1533
1534    for(size_t input_index = 0; input_index < mInputs.size(); input_index++) {
1535        sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(input_index);
1536        ssize_t patch_index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
1537        if (patch_index >= 0) {
1538            sp<AudioPatch> patchDesc = mAudioPatches.valueAt(patch_index);
1539            status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
1540            mAudioPatches.removeItemsAt(patch_index);
1541            patchRemoved = true;
1542        }
1543        mpClientInterface->closeInput(mInputs.keyAt(input_index));
1544    }
1545    mInputs.clear();
1546    nextAudioPortGeneration();
1547
1548    if (patchRemoved) {
1549        mpClientInterface->onAudioPatchListUpdate();
1550    }
1551}
1552
1553void AudioPolicyManager::initStreamVolume(audio_stream_type_t stream,
1554                                            int indexMin,
1555                                            int indexMax)
1556{
1557    ALOGV("initStreamVolume() stream %d, min %d, max %d", stream , indexMin, indexMax);
1558    if (indexMin < 0 || indexMin >= indexMax) {
1559        ALOGW("initStreamVolume() invalid index limits for stream %d, min %d, max %d", stream , indexMin, indexMax);
1560        return;
1561    }
1562    mStreams[stream].mIndexMin = indexMin;
1563    mStreams[stream].mIndexMax = indexMax;
1564}
1565
1566status_t AudioPolicyManager::setStreamVolumeIndex(audio_stream_type_t stream,
1567                                                      int index,
1568                                                      audio_devices_t device)
1569{
1570
1571    if ((index < mStreams[stream].mIndexMin) || (index > mStreams[stream].mIndexMax)) {
1572        return BAD_VALUE;
1573    }
1574    if (!audio_is_output_device(device)) {
1575        return BAD_VALUE;
1576    }
1577
1578    // Force max volume if stream cannot be muted
1579    if (!mStreams[stream].mCanBeMuted) index = mStreams[stream].mIndexMax;
1580
1581    ALOGV("setStreamVolumeIndex() stream %d, device %04x, index %d",
1582          stream, device, index);
1583
1584    // if device is AUDIO_DEVICE_OUT_DEFAULT set default value and
1585    // clear all device specific values
1586    if (device == AUDIO_DEVICE_OUT_DEFAULT) {
1587        mStreams[stream].mIndexCur.clear();
1588    }
1589    mStreams[stream].mIndexCur.add(device, index);
1590
1591    // compute and apply stream volume on all outputs according to connected device
1592    status_t status = NO_ERROR;
1593    for (size_t i = 0; i < mOutputs.size(); i++) {
1594        audio_devices_t curDevice =
1595                getDeviceForVolume(mOutputs.valueAt(i)->device());
1596        if ((device == AUDIO_DEVICE_OUT_DEFAULT) || (device == curDevice)) {
1597            status_t volStatus = checkAndSetVolume(stream, index, mOutputs.keyAt(i), curDevice);
1598            if (volStatus != NO_ERROR) {
1599                status = volStatus;
1600            }
1601        }
1602    }
1603    return status;
1604}
1605
1606status_t AudioPolicyManager::getStreamVolumeIndex(audio_stream_type_t stream,
1607                                                      int *index,
1608                                                      audio_devices_t device)
1609{
1610    if (index == NULL) {
1611        return BAD_VALUE;
1612    }
1613    if (!audio_is_output_device(device)) {
1614        return BAD_VALUE;
1615    }
1616    // if device is AUDIO_DEVICE_OUT_DEFAULT, return volume for device corresponding to
1617    // the strategy the stream belongs to.
1618    if (device == AUDIO_DEVICE_OUT_DEFAULT) {
1619        device = getDeviceForStrategy(getStrategy(stream), true /*fromCache*/);
1620    }
1621    device = getDeviceForVolume(device);
1622
1623    *index =  mStreams[stream].getVolumeIndex(device);
1624    ALOGV("getStreamVolumeIndex() stream %d device %08x index %d", stream, device, *index);
1625    return NO_ERROR;
1626}
1627
1628audio_io_handle_t AudioPolicyManager::selectOutputForEffects(
1629                                            const SortedVector<audio_io_handle_t>& outputs)
1630{
1631    // select one output among several suitable for global effects.
1632    // The priority is as follows:
1633    // 1: An offloaded output. If the effect ends up not being offloadable,
1634    //    AudioFlinger will invalidate the track and the offloaded output
1635    //    will be closed causing the effect to be moved to a PCM output.
1636    // 2: A deep buffer output
1637    // 3: the first output in the list
1638
1639    if (outputs.size() == 0) {
1640        return 0;
1641    }
1642
1643    audio_io_handle_t outputOffloaded = 0;
1644    audio_io_handle_t outputDeepBuffer = 0;
1645
1646    for (size_t i = 0; i < outputs.size(); i++) {
1647        sp<AudioOutputDescriptor> desc = mOutputs.valueFor(outputs[i]);
1648        ALOGV("selectOutputForEffects outputs[%zu] flags %x", i, desc->mFlags);
1649        if ((desc->mFlags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
1650            outputOffloaded = outputs[i];
1651        }
1652        if ((desc->mFlags & AUDIO_OUTPUT_FLAG_DEEP_BUFFER) != 0) {
1653            outputDeepBuffer = outputs[i];
1654        }
1655    }
1656
1657    ALOGV("selectOutputForEffects outputOffloaded %d outputDeepBuffer %d",
1658          outputOffloaded, outputDeepBuffer);
1659    if (outputOffloaded != 0) {
1660        return outputOffloaded;
1661    }
1662    if (outputDeepBuffer != 0) {
1663        return outputDeepBuffer;
1664    }
1665
1666    return outputs[0];
1667}
1668
1669audio_io_handle_t AudioPolicyManager::getOutputForEffect(const effect_descriptor_t *desc)
1670{
1671    // apply simple rule where global effects are attached to the same output as MUSIC streams
1672
1673    routing_strategy strategy = getStrategy(AUDIO_STREAM_MUSIC);
1674    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
1675    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(device, mOutputs);
1676
1677    audio_io_handle_t output = selectOutputForEffects(dstOutputs);
1678    ALOGV("getOutputForEffect() got output %d for fx %s flags %x",
1679          output, (desc == NULL) ? "unspecified" : desc->name,  (desc == NULL) ? 0 : desc->flags);
1680
1681    return output;
1682}
1683
1684status_t AudioPolicyManager::registerEffect(const effect_descriptor_t *desc,
1685                                audio_io_handle_t io,
1686                                uint32_t strategy,
1687                                int session,
1688                                int id)
1689{
1690    ssize_t index = mOutputs.indexOfKey(io);
1691    if (index < 0) {
1692        index = mInputs.indexOfKey(io);
1693        if (index < 0) {
1694            ALOGW("registerEffect() unknown io %d", io);
1695            return INVALID_OPERATION;
1696        }
1697    }
1698
1699    if (mTotalEffectsMemory + desc->memoryUsage > getMaxEffectsMemory()) {
1700        ALOGW("registerEffect() memory limit exceeded for Fx %s, Memory %d KB",
1701                desc->name, desc->memoryUsage);
1702        return INVALID_OPERATION;
1703    }
1704    mTotalEffectsMemory += desc->memoryUsage;
1705    ALOGV("registerEffect() effect %s, io %d, strategy %d session %d id %d",
1706            desc->name, io, strategy, session, id);
1707    ALOGV("registerEffect() memory %d, total memory %d", desc->memoryUsage, mTotalEffectsMemory);
1708
1709    sp<EffectDescriptor> effectDesc = new EffectDescriptor();
1710    memcpy (&effectDesc->mDesc, desc, sizeof(effect_descriptor_t));
1711    effectDesc->mIo = io;
1712    effectDesc->mStrategy = (routing_strategy)strategy;
1713    effectDesc->mSession = session;
1714    effectDesc->mEnabled = false;
1715
1716    mEffects.add(id, effectDesc);
1717
1718    return NO_ERROR;
1719}
1720
1721status_t AudioPolicyManager::unregisterEffect(int id)
1722{
1723    ssize_t index = mEffects.indexOfKey(id);
1724    if (index < 0) {
1725        ALOGW("unregisterEffect() unknown effect ID %d", id);
1726        return INVALID_OPERATION;
1727    }
1728
1729    sp<EffectDescriptor> effectDesc = mEffects.valueAt(index);
1730
1731    setEffectEnabled(effectDesc, false);
1732
1733    if (mTotalEffectsMemory < effectDesc->mDesc.memoryUsage) {
1734        ALOGW("unregisterEffect() memory %d too big for total %d",
1735                effectDesc->mDesc.memoryUsage, mTotalEffectsMemory);
1736        effectDesc->mDesc.memoryUsage = mTotalEffectsMemory;
1737    }
1738    mTotalEffectsMemory -= effectDesc->mDesc.memoryUsage;
1739    ALOGV("unregisterEffect() effect %s, ID %d, memory %d total memory %d",
1740            effectDesc->mDesc.name, id, effectDesc->mDesc.memoryUsage, mTotalEffectsMemory);
1741
1742    mEffects.removeItem(id);
1743
1744    return NO_ERROR;
1745}
1746
1747status_t AudioPolicyManager::setEffectEnabled(int id, bool enabled)
1748{
1749    ssize_t index = mEffects.indexOfKey(id);
1750    if (index < 0) {
1751        ALOGW("unregisterEffect() unknown effect ID %d", id);
1752        return INVALID_OPERATION;
1753    }
1754
1755    return setEffectEnabled(mEffects.valueAt(index), enabled);
1756}
1757
1758status_t AudioPolicyManager::setEffectEnabled(const sp<EffectDescriptor>& effectDesc, bool enabled)
1759{
1760    if (enabled == effectDesc->mEnabled) {
1761        ALOGV("setEffectEnabled(%s) effect already %s",
1762             enabled?"true":"false", enabled?"enabled":"disabled");
1763        return INVALID_OPERATION;
1764    }
1765
1766    if (enabled) {
1767        if (mTotalEffectsCpuLoad + effectDesc->mDesc.cpuLoad > getMaxEffectsCpuLoad()) {
1768            ALOGW("setEffectEnabled(true) CPU Load limit exceeded for Fx %s, CPU %f MIPS",
1769                 effectDesc->mDesc.name, (float)effectDesc->mDesc.cpuLoad/10);
1770            return INVALID_OPERATION;
1771        }
1772        mTotalEffectsCpuLoad += effectDesc->mDesc.cpuLoad;
1773        ALOGV("setEffectEnabled(true) total CPU %d", mTotalEffectsCpuLoad);
1774    } else {
1775        if (mTotalEffectsCpuLoad < effectDesc->mDesc.cpuLoad) {
1776            ALOGW("setEffectEnabled(false) CPU load %d too high for total %d",
1777                    effectDesc->mDesc.cpuLoad, mTotalEffectsCpuLoad);
1778            effectDesc->mDesc.cpuLoad = mTotalEffectsCpuLoad;
1779        }
1780        mTotalEffectsCpuLoad -= effectDesc->mDesc.cpuLoad;
1781        ALOGV("setEffectEnabled(false) total CPU %d", mTotalEffectsCpuLoad);
1782    }
1783    effectDesc->mEnabled = enabled;
1784    return NO_ERROR;
1785}
1786
1787bool AudioPolicyManager::isNonOffloadableEffectEnabled()
1788{
1789    for (size_t i = 0; i < mEffects.size(); i++) {
1790        sp<EffectDescriptor> effectDesc = mEffects.valueAt(i);
1791        if (effectDesc->mEnabled && (effectDesc->mStrategy == STRATEGY_MEDIA) &&
1792                ((effectDesc->mDesc.flags & EFFECT_FLAG_OFFLOAD_SUPPORTED) == 0)) {
1793            ALOGV("isNonOffloadableEffectEnabled() non offloadable effect %s enabled on session %d",
1794                  effectDesc->mDesc.name, effectDesc->mSession);
1795            return true;
1796        }
1797    }
1798    return false;
1799}
1800
1801bool AudioPolicyManager::isStreamActive(audio_stream_type_t stream, uint32_t inPastMs) const
1802{
1803    nsecs_t sysTime = systemTime();
1804    for (size_t i = 0; i < mOutputs.size(); i++) {
1805        const sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
1806        if (outputDesc->isStreamActive(stream, inPastMs, sysTime)) {
1807            return true;
1808        }
1809    }
1810    return false;
1811}
1812
1813bool AudioPolicyManager::isStreamActiveRemotely(audio_stream_type_t stream,
1814                                                    uint32_t inPastMs) const
1815{
1816    nsecs_t sysTime = systemTime();
1817    for (size_t i = 0; i < mOutputs.size(); i++) {
1818        const sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
1819        if (((outputDesc->device() & APM_AUDIO_OUT_DEVICE_REMOTE_ALL) != 0) &&
1820                outputDesc->isStreamActive(stream, inPastMs, sysTime)) {
1821            return true;
1822        }
1823    }
1824    return false;
1825}
1826
1827bool AudioPolicyManager::isSourceActive(audio_source_t source) const
1828{
1829    for (size_t i = 0; i < mInputs.size(); i++) {
1830        const sp<AudioInputDescriptor>  inputDescriptor = mInputs.valueAt(i);
1831        if ((inputDescriptor->mInputSource == (int)source ||
1832                (source == AUDIO_SOURCE_VOICE_RECOGNITION &&
1833                 inputDescriptor->mInputSource == AUDIO_SOURCE_HOTWORD))
1834             && (inputDescriptor->mRefCount > 0)) {
1835            return true;
1836        }
1837    }
1838    return false;
1839}
1840
1841
1842status_t AudioPolicyManager::dump(int fd)
1843{
1844    const size_t SIZE = 256;
1845    char buffer[SIZE];
1846    String8 result;
1847
1848    snprintf(buffer, SIZE, "\nAudioPolicyManager Dump: %p\n", this);
1849    result.append(buffer);
1850
1851    snprintf(buffer, SIZE, " Primary Output: %d\n", mPrimaryOutput);
1852    result.append(buffer);
1853    snprintf(buffer, SIZE, " Phone state: %d\n", mPhoneState);
1854    result.append(buffer);
1855    snprintf(buffer, SIZE, " Force use for communications %d\n",
1856             mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]);
1857    result.append(buffer);
1858    snprintf(buffer, SIZE, " Force use for media %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA]);
1859    result.append(buffer);
1860    snprintf(buffer, SIZE, " Force use for record %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD]);
1861    result.append(buffer);
1862    snprintf(buffer, SIZE, " Force use for dock %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_DOCK]);
1863    result.append(buffer);
1864    snprintf(buffer, SIZE, " Force use for system %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM]);
1865    result.append(buffer);
1866    snprintf(buffer, SIZE, " Force use for hdmi system audio %d\n",
1867            mForceUse[AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO]);
1868    result.append(buffer);
1869
1870    snprintf(buffer, SIZE, " Available output devices:\n");
1871    result.append(buffer);
1872    write(fd, result.string(), result.size());
1873    for (size_t i = 0; i < mAvailableOutputDevices.size(); i++) {
1874        mAvailableOutputDevices[i]->dump(fd, 2, i);
1875    }
1876    snprintf(buffer, SIZE, "\n Available input devices:\n");
1877    write(fd, buffer, strlen(buffer));
1878    for (size_t i = 0; i < mAvailableInputDevices.size(); i++) {
1879        mAvailableInputDevices[i]->dump(fd, 2, i);
1880    }
1881
1882    snprintf(buffer, SIZE, "\nHW Modules dump:\n");
1883    write(fd, buffer, strlen(buffer));
1884    for (size_t i = 0; i < mHwModules.size(); i++) {
1885        snprintf(buffer, SIZE, "- HW Module %zu:\n", i + 1);
1886        write(fd, buffer, strlen(buffer));
1887        mHwModules[i]->dump(fd);
1888    }
1889
1890    snprintf(buffer, SIZE, "\nOutputs dump:\n");
1891    write(fd, buffer, strlen(buffer));
1892    for (size_t i = 0; i < mOutputs.size(); i++) {
1893        snprintf(buffer, SIZE, "- Output %d dump:\n", mOutputs.keyAt(i));
1894        write(fd, buffer, strlen(buffer));
1895        mOutputs.valueAt(i)->dump(fd);
1896    }
1897
1898    snprintf(buffer, SIZE, "\nInputs dump:\n");
1899    write(fd, buffer, strlen(buffer));
1900    for (size_t i = 0; i < mInputs.size(); i++) {
1901        snprintf(buffer, SIZE, "- Input %d dump:\n", mInputs.keyAt(i));
1902        write(fd, buffer, strlen(buffer));
1903        mInputs.valueAt(i)->dump(fd);
1904    }
1905
1906    snprintf(buffer, SIZE, "\nStreams dump:\n");
1907    write(fd, buffer, strlen(buffer));
1908    snprintf(buffer, SIZE,
1909             " Stream  Can be muted  Index Min  Index Max  Index Cur [device : index]...\n");
1910    write(fd, buffer, strlen(buffer));
1911    for (size_t i = 0; i < AUDIO_STREAM_CNT; i++) {
1912        snprintf(buffer, SIZE, " %02zu      ", i);
1913        write(fd, buffer, strlen(buffer));
1914        mStreams[i].dump(fd);
1915    }
1916
1917    snprintf(buffer, SIZE, "\nTotal Effects CPU: %f MIPS, Total Effects memory: %d KB\n",
1918            (float)mTotalEffectsCpuLoad/10, mTotalEffectsMemory);
1919    write(fd, buffer, strlen(buffer));
1920
1921    snprintf(buffer, SIZE, "Registered effects:\n");
1922    write(fd, buffer, strlen(buffer));
1923    for (size_t i = 0; i < mEffects.size(); i++) {
1924        snprintf(buffer, SIZE, "- Effect %d dump:\n", mEffects.keyAt(i));
1925        write(fd, buffer, strlen(buffer));
1926        mEffects.valueAt(i)->dump(fd);
1927    }
1928
1929    snprintf(buffer, SIZE, "\nAudio Patches:\n");
1930    write(fd, buffer, strlen(buffer));
1931    for (size_t i = 0; i < mAudioPatches.size(); i++) {
1932        mAudioPatches[i]->dump(fd, 2, i);
1933    }
1934
1935    return NO_ERROR;
1936}
1937
1938// This function checks for the parameters which can be offloaded.
1939// This can be enhanced depending on the capability of the DSP and policy
1940// of the system.
1941bool AudioPolicyManager::isOffloadSupported(const audio_offload_info_t& offloadInfo)
1942{
1943    ALOGV("isOffloadSupported: SR=%u, CM=0x%x, Format=0x%x, StreamType=%d,"
1944     " BitRate=%u, duration=%" PRId64 " us, has_video=%d",
1945     offloadInfo.sample_rate, offloadInfo.channel_mask,
1946     offloadInfo.format,
1947     offloadInfo.stream_type, offloadInfo.bit_rate, offloadInfo.duration_us,
1948     offloadInfo.has_video);
1949
1950    // Check if offload has been disabled
1951    char propValue[PROPERTY_VALUE_MAX];
1952    if (property_get("audio.offload.disable", propValue, "0")) {
1953        if (atoi(propValue) != 0) {
1954            ALOGV("offload disabled by audio.offload.disable=%s", propValue );
1955            return false;
1956        }
1957    }
1958
1959    // Check if stream type is music, then only allow offload as of now.
1960    if (offloadInfo.stream_type != AUDIO_STREAM_MUSIC)
1961    {
1962        ALOGV("isOffloadSupported: stream_type != MUSIC, returning false");
1963        return false;
1964    }
1965
1966    //TODO: enable audio offloading with video when ready
1967    if (offloadInfo.has_video)
1968    {
1969        ALOGV("isOffloadSupported: has_video == true, returning false");
1970        return false;
1971    }
1972
1973    //If duration is less than minimum value defined in property, return false
1974    if (property_get("audio.offload.min.duration.secs", propValue, NULL)) {
1975        if (offloadInfo.duration_us < (atoi(propValue) * 1000000 )) {
1976            ALOGV("Offload denied by duration < audio.offload.min.duration.secs(=%s)", propValue);
1977            return false;
1978        }
1979    } else if (offloadInfo.duration_us < OFFLOAD_DEFAULT_MIN_DURATION_SECS * 1000000) {
1980        ALOGV("Offload denied by duration < default min(=%u)", OFFLOAD_DEFAULT_MIN_DURATION_SECS);
1981        return false;
1982    }
1983
1984    // Do not allow offloading if one non offloadable effect is enabled. This prevents from
1985    // creating an offloaded track and tearing it down immediately after start when audioflinger
1986    // detects there is an active non offloadable effect.
1987    // FIXME: We should check the audio session here but we do not have it in this context.
1988    // This may prevent offloading in rare situations where effects are left active by apps
1989    // in the background.
1990    if (isNonOffloadableEffectEnabled()) {
1991        return false;
1992    }
1993
1994    // See if there is a profile to support this.
1995    // AUDIO_DEVICE_NONE
1996    sp<IOProfile> profile = getProfileForDirectOutput(AUDIO_DEVICE_NONE /*ignore device */,
1997                                            offloadInfo.sample_rate,
1998                                            offloadInfo.format,
1999                                            offloadInfo.channel_mask,
2000                                            AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD);
2001    ALOGV("isOffloadSupported() profile %sfound", profile != 0 ? "" : "NOT ");
2002    return (profile != 0);
2003}
2004
2005status_t AudioPolicyManager::listAudioPorts(audio_port_role_t role,
2006                                            audio_port_type_t type,
2007                                            unsigned int *num_ports,
2008                                            struct audio_port *ports,
2009                                            unsigned int *generation)
2010{
2011    if (num_ports == NULL || (*num_ports != 0 && ports == NULL) ||
2012            generation == NULL) {
2013        return BAD_VALUE;
2014    }
2015    ALOGV("listAudioPorts() role %d type %d num_ports %d ports %p", role, type, *num_ports, ports);
2016    if (ports == NULL) {
2017        *num_ports = 0;
2018    }
2019
2020    size_t portsWritten = 0;
2021    size_t portsMax = *num_ports;
2022    *num_ports = 0;
2023    if (type == AUDIO_PORT_TYPE_NONE || type == AUDIO_PORT_TYPE_DEVICE) {
2024        if (role == AUDIO_PORT_ROLE_SINK || role == AUDIO_PORT_ROLE_NONE) {
2025            for (size_t i = 0;
2026                    i  < mAvailableOutputDevices.size() && portsWritten < portsMax; i++) {
2027                mAvailableOutputDevices[i]->toAudioPort(&ports[portsWritten++]);
2028            }
2029            *num_ports += mAvailableOutputDevices.size();
2030        }
2031        if (role == AUDIO_PORT_ROLE_SOURCE || role == AUDIO_PORT_ROLE_NONE) {
2032            for (size_t i = 0;
2033                    i  < mAvailableInputDevices.size() && portsWritten < portsMax; i++) {
2034                mAvailableInputDevices[i]->toAudioPort(&ports[portsWritten++]);
2035            }
2036            *num_ports += mAvailableInputDevices.size();
2037        }
2038    }
2039    if (type == AUDIO_PORT_TYPE_NONE || type == AUDIO_PORT_TYPE_MIX) {
2040        if (role == AUDIO_PORT_ROLE_SINK || role == AUDIO_PORT_ROLE_NONE) {
2041            for (size_t i = 0; i < mInputs.size() && portsWritten < portsMax; i++) {
2042                mInputs[i]->toAudioPort(&ports[portsWritten++]);
2043            }
2044            *num_ports += mInputs.size();
2045        }
2046        if (role == AUDIO_PORT_ROLE_SOURCE || role == AUDIO_PORT_ROLE_NONE) {
2047            size_t numOutputs = 0;
2048            for (size_t i = 0; i < mOutputs.size(); i++) {
2049                if (!mOutputs[i]->isDuplicated()) {
2050                    numOutputs++;
2051                    if (portsWritten < portsMax) {
2052                        mOutputs[i]->toAudioPort(&ports[portsWritten++]);
2053                    }
2054                }
2055            }
2056            *num_ports += numOutputs;
2057        }
2058    }
2059    *generation = curAudioPortGeneration();
2060    ALOGV("listAudioPorts() got %zu ports needed %d", portsWritten, *num_ports);
2061    return NO_ERROR;
2062}
2063
2064status_t AudioPolicyManager::getAudioPort(struct audio_port *port __unused)
2065{
2066    return NO_ERROR;
2067}
2068
2069sp<AudioPolicyManager::AudioOutputDescriptor> AudioPolicyManager::getOutputFromId(
2070                                                                    audio_port_handle_t id) const
2071{
2072    sp<AudioOutputDescriptor> outputDesc = NULL;
2073    for (size_t i = 0; i < mOutputs.size(); i++) {
2074        outputDesc = mOutputs.valueAt(i);
2075        if (outputDesc->mId == id) {
2076            break;
2077        }
2078    }
2079    return outputDesc;
2080}
2081
2082sp<AudioPolicyManager::AudioInputDescriptor> AudioPolicyManager::getInputFromId(
2083                                                                    audio_port_handle_t id) const
2084{
2085    sp<AudioInputDescriptor> inputDesc = NULL;
2086    for (size_t i = 0; i < mInputs.size(); i++) {
2087        inputDesc = mInputs.valueAt(i);
2088        if (inputDesc->mId == id) {
2089            break;
2090        }
2091    }
2092    return inputDesc;
2093}
2094
2095sp <AudioPolicyManager::HwModule> AudioPolicyManager::getModuleForDevice(
2096                                                                    audio_devices_t device) const
2097{
2098    sp <HwModule> module;
2099
2100    for (size_t i = 0; i < mHwModules.size(); i++) {
2101        if (mHwModules[i]->mHandle == 0) {
2102            continue;
2103        }
2104        if (audio_is_output_device(device)) {
2105            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
2106            {
2107                if (mHwModules[i]->mOutputProfiles[j]->mSupportedDevices.types() & device) {
2108                    return mHwModules[i];
2109                }
2110            }
2111        } else {
2112            for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++) {
2113                if (mHwModules[i]->mInputProfiles[j]->mSupportedDevices.types() &
2114                        device & ~AUDIO_DEVICE_BIT_IN) {
2115                    return mHwModules[i];
2116                }
2117            }
2118        }
2119    }
2120    return module;
2121}
2122
2123sp <AudioPolicyManager::HwModule> AudioPolicyManager::getModuleFromName(const char *name) const
2124{
2125    sp <HwModule> module;
2126
2127    for (size_t i = 0; i < mHwModules.size(); i++)
2128    {
2129        if (strcmp(mHwModules[i]->mName, name) == 0) {
2130            return mHwModules[i];
2131        }
2132    }
2133    return module;
2134}
2135
2136audio_devices_t AudioPolicyManager::availablePrimaryOutputDevices()
2137{
2138    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
2139    audio_devices_t devices = outputDesc->mProfile->mSupportedDevices.types();
2140    return devices & mAvailableOutputDevices.types();
2141}
2142
2143audio_devices_t AudioPolicyManager::availablePrimaryInputDevices()
2144{
2145    audio_module_handle_t primaryHandle =
2146                                mOutputs.valueFor(mPrimaryOutput)->mProfile->mModule->mHandle;
2147    audio_devices_t devices = AUDIO_DEVICE_NONE;
2148    for (size_t i = 0; i < mAvailableInputDevices.size(); i++) {
2149        if (mAvailableInputDevices[i]->mModule->mHandle == primaryHandle) {
2150            devices |= mAvailableInputDevices[i]->mDeviceType;
2151        }
2152    }
2153    return devices;
2154}
2155
2156status_t AudioPolicyManager::createAudioPatch(const struct audio_patch *patch,
2157                                               audio_patch_handle_t *handle,
2158                                               uid_t uid)
2159{
2160    ALOGV("createAudioPatch()");
2161
2162    if (handle == NULL || patch == NULL) {
2163        return BAD_VALUE;
2164    }
2165    ALOGV("createAudioPatch() num sources %d num sinks %d", patch->num_sources, patch->num_sinks);
2166
2167    if (patch->num_sources == 0 || patch->num_sources > AUDIO_PATCH_PORTS_MAX ||
2168            patch->num_sinks == 0 || patch->num_sinks > AUDIO_PATCH_PORTS_MAX) {
2169        return BAD_VALUE;
2170    }
2171    // only one source per audio patch supported for now
2172    if (patch->num_sources > 1) {
2173        return INVALID_OPERATION;
2174    }
2175
2176    if (patch->sources[0].role != AUDIO_PORT_ROLE_SOURCE) {
2177        return INVALID_OPERATION;
2178    }
2179    for (size_t i = 0; i < patch->num_sinks; i++) {
2180        if (patch->sinks[i].role != AUDIO_PORT_ROLE_SINK) {
2181            return INVALID_OPERATION;
2182        }
2183    }
2184
2185    sp<AudioPatch> patchDesc;
2186    ssize_t index = mAudioPatches.indexOfKey(*handle);
2187
2188    ALOGV("createAudioPatch source id %d role %d type %d", patch->sources[0].id,
2189                                                           patch->sources[0].role,
2190                                                           patch->sources[0].type);
2191#if LOG_NDEBUG == 0
2192    for (size_t i = 0; i < patch->num_sinks; i++) {
2193        ALOGV("createAudioPatch sink %d: id %d role %d type %d", i, patch->sinks[i].id,
2194                                                             patch->sinks[i].role,
2195                                                             patch->sinks[i].type);
2196    }
2197#endif
2198
2199    if (index >= 0) {
2200        patchDesc = mAudioPatches.valueAt(index);
2201        ALOGV("createAudioPatch() mUidCached %d patchDesc->mUid %d uid %d",
2202                                                                  mUidCached, patchDesc->mUid, uid);
2203        if (patchDesc->mUid != mUidCached && uid != patchDesc->mUid) {
2204            return INVALID_OPERATION;
2205        }
2206    } else {
2207        *handle = 0;
2208    }
2209
2210    if (patch->sources[0].type == AUDIO_PORT_TYPE_MIX) {
2211        sp<AudioOutputDescriptor> outputDesc = getOutputFromId(patch->sources[0].id);
2212        if (outputDesc == NULL) {
2213            ALOGV("createAudioPatch() output not found for id %d", patch->sources[0].id);
2214            return BAD_VALUE;
2215        }
2216        ALOG_ASSERT(!outputDesc->isDuplicated(),"duplicated output %d in source in ports",
2217                                                outputDesc->mIoHandle);
2218        if (patchDesc != 0) {
2219            if (patchDesc->mPatch.sources[0].id != patch->sources[0].id) {
2220                ALOGV("createAudioPatch() source id differs for patch current id %d new id %d",
2221                                          patchDesc->mPatch.sources[0].id, patch->sources[0].id);
2222                return BAD_VALUE;
2223            }
2224        }
2225        DeviceVector devices;
2226        for (size_t i = 0; i < patch->num_sinks; i++) {
2227            // Only support mix to devices connection
2228            // TODO add support for mix to mix connection
2229            if (patch->sinks[i].type != AUDIO_PORT_TYPE_DEVICE) {
2230                ALOGV("createAudioPatch() source mix but sink is not a device");
2231                return INVALID_OPERATION;
2232            }
2233            sp<DeviceDescriptor> devDesc =
2234                    mAvailableOutputDevices.getDeviceFromId(patch->sinks[i].id);
2235            if (devDesc == 0) {
2236                ALOGV("createAudioPatch() out device not found for id %d", patch->sinks[i].id);
2237                return BAD_VALUE;
2238            }
2239
2240            if (!outputDesc->mProfile->isCompatibleProfile(devDesc->mDeviceType,
2241                                                           patch->sources[0].sample_rate,
2242                                                         NULL,  // updatedSamplingRate
2243                                                         patch->sources[0].format,
2244                                                         patch->sources[0].channel_mask,
2245                                                         AUDIO_OUTPUT_FLAG_NONE /*FIXME*/)) {
2246                ALOGV("createAudioPatch() profile not supported for device %08x",
2247                      devDesc->mDeviceType);
2248                return INVALID_OPERATION;
2249            }
2250            devices.add(devDesc);
2251        }
2252        if (devices.size() == 0) {
2253            return INVALID_OPERATION;
2254        }
2255
2256        // TODO: reconfigure output format and channels here
2257        ALOGV("createAudioPatch() setting device %08x on output %d",
2258              devices.types(), outputDesc->mIoHandle);
2259        setOutputDevice(outputDesc->mIoHandle, devices.types(), true, 0, handle);
2260        index = mAudioPatches.indexOfKey(*handle);
2261        if (index >= 0) {
2262            if (patchDesc != 0 && patchDesc != mAudioPatches.valueAt(index)) {
2263                ALOGW("createAudioPatch() setOutputDevice() did not reuse the patch provided");
2264            }
2265            patchDesc = mAudioPatches.valueAt(index);
2266            patchDesc->mUid = uid;
2267            ALOGV("createAudioPatch() success");
2268        } else {
2269            ALOGW("createAudioPatch() setOutputDevice() failed to create a patch");
2270            return INVALID_OPERATION;
2271        }
2272    } else if (patch->sources[0].type == AUDIO_PORT_TYPE_DEVICE) {
2273        if (patch->sinks[0].type == AUDIO_PORT_TYPE_MIX) {
2274            // input device to input mix connection
2275            // only one sink supported when connecting an input device to a mix
2276            if (patch->num_sinks > 1) {
2277                return INVALID_OPERATION;
2278            }
2279            sp<AudioInputDescriptor> inputDesc = getInputFromId(patch->sinks[0].id);
2280            if (inputDesc == NULL) {
2281                return BAD_VALUE;
2282            }
2283            if (patchDesc != 0) {
2284                if (patchDesc->mPatch.sinks[0].id != patch->sinks[0].id) {
2285                    return BAD_VALUE;
2286                }
2287            }
2288            sp<DeviceDescriptor> devDesc =
2289                    mAvailableInputDevices.getDeviceFromId(patch->sources[0].id);
2290            if (devDesc == 0) {
2291                return BAD_VALUE;
2292            }
2293
2294            if (!inputDesc->mProfile->isCompatibleProfile(devDesc->mDeviceType,
2295                                                         patch->sinks[0].sample_rate,
2296                                                         NULL, /*updatedSampleRate*/
2297                                                         patch->sinks[0].format,
2298                                                         patch->sinks[0].channel_mask,
2299                                                         // FIXME for the parameter type,
2300                                                         // and the NONE
2301                                                         (audio_output_flags_t)
2302                                                            AUDIO_INPUT_FLAG_NONE)) {
2303                return INVALID_OPERATION;
2304            }
2305            // TODO: reconfigure output format and channels here
2306            ALOGV("createAudioPatch() setting device %08x on output %d",
2307                                                  devDesc->mDeviceType, inputDesc->mIoHandle);
2308            setInputDevice(inputDesc->mIoHandle, devDesc->mDeviceType, true, handle);
2309            index = mAudioPatches.indexOfKey(*handle);
2310            if (index >= 0) {
2311                if (patchDesc != 0 && patchDesc != mAudioPatches.valueAt(index)) {
2312                    ALOGW("createAudioPatch() setInputDevice() did not reuse the patch provided");
2313                }
2314                patchDesc = mAudioPatches.valueAt(index);
2315                patchDesc->mUid = uid;
2316                ALOGV("createAudioPatch() success");
2317            } else {
2318                ALOGW("createAudioPatch() setInputDevice() failed to create a patch");
2319                return INVALID_OPERATION;
2320            }
2321        } else if (patch->sinks[0].type == AUDIO_PORT_TYPE_DEVICE) {
2322            // device to device connection
2323            if (patchDesc != 0) {
2324                if (patchDesc->mPatch.sources[0].id != patch->sources[0].id) {
2325                    return BAD_VALUE;
2326                }
2327            }
2328            sp<DeviceDescriptor> srcDeviceDesc =
2329                    mAvailableInputDevices.getDeviceFromId(patch->sources[0].id);
2330            if (srcDeviceDesc == 0) {
2331                return BAD_VALUE;
2332            }
2333
2334            //update source and sink with our own data as the data passed in the patch may
2335            // be incomplete.
2336            struct audio_patch newPatch = *patch;
2337            srcDeviceDesc->toAudioPortConfig(&newPatch.sources[0], &patch->sources[0]);
2338
2339            for (size_t i = 0; i < patch->num_sinks; i++) {
2340                if (patch->sinks[i].type != AUDIO_PORT_TYPE_DEVICE) {
2341                    ALOGV("createAudioPatch() source device but one sink is not a device");
2342                    return INVALID_OPERATION;
2343                }
2344
2345                sp<DeviceDescriptor> sinkDeviceDesc =
2346                        mAvailableOutputDevices.getDeviceFromId(patch->sinks[i].id);
2347                if (sinkDeviceDesc == 0) {
2348                    return BAD_VALUE;
2349                }
2350                sinkDeviceDesc->toAudioPortConfig(&newPatch.sinks[i], &patch->sinks[i]);
2351
2352                if (srcDeviceDesc->mModule != sinkDeviceDesc->mModule) {
2353                    // only one sink supported when connected devices across HW modules
2354                    if (patch->num_sinks > 1) {
2355                        return INVALID_OPERATION;
2356                    }
2357                    SortedVector<audio_io_handle_t> outputs =
2358                                            getOutputsForDevice(sinkDeviceDesc->mDeviceType,
2359                                                                mOutputs);
2360                    // if the sink device is reachable via an opened output stream, request to go via
2361                    // this output stream by adding a second source to the patch description
2362                    audio_io_handle_t output = selectOutput(outputs,
2363                                                            AUDIO_OUTPUT_FLAG_NONE,
2364                                                            AUDIO_FORMAT_INVALID);
2365                    if (output != AUDIO_IO_HANDLE_NONE) {
2366                        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
2367                        if (outputDesc->isDuplicated()) {
2368                            return INVALID_OPERATION;
2369                        }
2370                        outputDesc->toAudioPortConfig(&newPatch.sources[1], &patch->sources[0]);
2371                        newPatch.num_sources = 2;
2372                    }
2373                }
2374            }
2375            // TODO: check from routing capabilities in config file and other conflicting patches
2376
2377            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
2378            if (index >= 0) {
2379                afPatchHandle = patchDesc->mAfPatchHandle;
2380            }
2381
2382            status_t status = mpClientInterface->createAudioPatch(&newPatch,
2383                                                                  &afPatchHandle,
2384                                                                  0);
2385            ALOGV("createAudioPatch() patch panel returned %d patchHandle %d",
2386                                                                  status, afPatchHandle);
2387            if (status == NO_ERROR) {
2388                if (index < 0) {
2389                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
2390                                               &newPatch, uid);
2391                    addAudioPatch(patchDesc->mHandle, patchDesc);
2392                } else {
2393                    patchDesc->mPatch = newPatch;
2394                }
2395                patchDesc->mAfPatchHandle = afPatchHandle;
2396                *handle = patchDesc->mHandle;
2397                nextAudioPortGeneration();
2398                mpClientInterface->onAudioPatchListUpdate();
2399            } else {
2400                ALOGW("createAudioPatch() patch panel could not connect device patch, error %d",
2401                status);
2402                return INVALID_OPERATION;
2403            }
2404        } else {
2405            return BAD_VALUE;
2406        }
2407    } else {
2408        return BAD_VALUE;
2409    }
2410    return NO_ERROR;
2411}
2412
2413status_t AudioPolicyManager::releaseAudioPatch(audio_patch_handle_t handle,
2414                                                  uid_t uid)
2415{
2416    ALOGV("releaseAudioPatch() patch %d", handle);
2417
2418    ssize_t index = mAudioPatches.indexOfKey(handle);
2419
2420    if (index < 0) {
2421        return BAD_VALUE;
2422    }
2423    sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
2424    ALOGV("releaseAudioPatch() mUidCached %d patchDesc->mUid %d uid %d",
2425          mUidCached, patchDesc->mUid, uid);
2426    if (patchDesc->mUid != mUidCached && uid != patchDesc->mUid) {
2427        return INVALID_OPERATION;
2428    }
2429
2430    struct audio_patch *patch = &patchDesc->mPatch;
2431    patchDesc->mUid = mUidCached;
2432    if (patch->sources[0].type == AUDIO_PORT_TYPE_MIX) {
2433        sp<AudioOutputDescriptor> outputDesc = getOutputFromId(patch->sources[0].id);
2434        if (outputDesc == NULL) {
2435            ALOGV("releaseAudioPatch() output not found for id %d", patch->sources[0].id);
2436            return BAD_VALUE;
2437        }
2438
2439        setOutputDevice(outputDesc->mIoHandle,
2440                        getNewOutputDevice(outputDesc->mIoHandle, true /*fromCache*/),
2441                       true,
2442                       0,
2443                       NULL);
2444    } else if (patch->sources[0].type == AUDIO_PORT_TYPE_DEVICE) {
2445        if (patch->sinks[0].type == AUDIO_PORT_TYPE_MIX) {
2446            sp<AudioInputDescriptor> inputDesc = getInputFromId(patch->sinks[0].id);
2447            if (inputDesc == NULL) {
2448                ALOGV("releaseAudioPatch() input not found for id %d", patch->sinks[0].id);
2449                return BAD_VALUE;
2450            }
2451            setInputDevice(inputDesc->mIoHandle,
2452                           getNewInputDevice(inputDesc->mIoHandle),
2453                           true,
2454                           NULL);
2455        } else if (patch->sinks[0].type == AUDIO_PORT_TYPE_DEVICE) {
2456            audio_patch_handle_t afPatchHandle = patchDesc->mAfPatchHandle;
2457            status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
2458            ALOGV("releaseAudioPatch() patch panel returned %d patchHandle %d",
2459                                                              status, patchDesc->mAfPatchHandle);
2460            removeAudioPatch(patchDesc->mHandle);
2461            nextAudioPortGeneration();
2462            mpClientInterface->onAudioPatchListUpdate();
2463        } else {
2464            return BAD_VALUE;
2465        }
2466    } else {
2467        return BAD_VALUE;
2468    }
2469    return NO_ERROR;
2470}
2471
2472status_t AudioPolicyManager::listAudioPatches(unsigned int *num_patches,
2473                                              struct audio_patch *patches,
2474                                              unsigned int *generation)
2475{
2476    if (num_patches == NULL || (*num_patches != 0 && patches == NULL) ||
2477            generation == NULL) {
2478        return BAD_VALUE;
2479    }
2480    ALOGV("listAudioPatches() num_patches %d patches %p available patches %zu",
2481          *num_patches, patches, mAudioPatches.size());
2482    if (patches == NULL) {
2483        *num_patches = 0;
2484    }
2485
2486    size_t patchesWritten = 0;
2487    size_t patchesMax = *num_patches;
2488    for (size_t i = 0;
2489            i  < mAudioPatches.size() && patchesWritten < patchesMax; i++) {
2490        patches[patchesWritten] = mAudioPatches[i]->mPatch;
2491        patches[patchesWritten++].id = mAudioPatches[i]->mHandle;
2492        ALOGV("listAudioPatches() patch %zu num_sources %d num_sinks %d",
2493              i, mAudioPatches[i]->mPatch.num_sources, mAudioPatches[i]->mPatch.num_sinks);
2494    }
2495    *num_patches = mAudioPatches.size();
2496
2497    *generation = curAudioPortGeneration();
2498    ALOGV("listAudioPatches() got %zu patches needed %d", patchesWritten, *num_patches);
2499    return NO_ERROR;
2500}
2501
2502status_t AudioPolicyManager::setAudioPortConfig(const struct audio_port_config *config)
2503{
2504    ALOGV("setAudioPortConfig()");
2505
2506    if (config == NULL) {
2507        return BAD_VALUE;
2508    }
2509    ALOGV("setAudioPortConfig() on port handle %d", config->id);
2510    // Only support gain configuration for now
2511    if (config->config_mask != AUDIO_PORT_CONFIG_GAIN) {
2512        return INVALID_OPERATION;
2513    }
2514
2515    sp<AudioPortConfig> audioPortConfig;
2516    if (config->type == AUDIO_PORT_TYPE_MIX) {
2517        if (config->role == AUDIO_PORT_ROLE_SOURCE) {
2518            sp<AudioOutputDescriptor> outputDesc = getOutputFromId(config->id);
2519            if (outputDesc == NULL) {
2520                return BAD_VALUE;
2521            }
2522            ALOG_ASSERT(!outputDesc->isDuplicated(),
2523                        "setAudioPortConfig() called on duplicated output %d",
2524                        outputDesc->mIoHandle);
2525            audioPortConfig = outputDesc;
2526        } else if (config->role == AUDIO_PORT_ROLE_SINK) {
2527            sp<AudioInputDescriptor> inputDesc = getInputFromId(config->id);
2528            if (inputDesc == NULL) {
2529                return BAD_VALUE;
2530            }
2531            audioPortConfig = inputDesc;
2532        } else {
2533            return BAD_VALUE;
2534        }
2535    } else if (config->type == AUDIO_PORT_TYPE_DEVICE) {
2536        sp<DeviceDescriptor> deviceDesc;
2537        if (config->role == AUDIO_PORT_ROLE_SOURCE) {
2538            deviceDesc = mAvailableInputDevices.getDeviceFromId(config->id);
2539        } else if (config->role == AUDIO_PORT_ROLE_SINK) {
2540            deviceDesc = mAvailableOutputDevices.getDeviceFromId(config->id);
2541        } else {
2542            return BAD_VALUE;
2543        }
2544        if (deviceDesc == NULL) {
2545            return BAD_VALUE;
2546        }
2547        audioPortConfig = deviceDesc;
2548    } else {
2549        return BAD_VALUE;
2550    }
2551
2552    struct audio_port_config backupConfig;
2553    status_t status = audioPortConfig->applyAudioPortConfig(config, &backupConfig);
2554    if (status == NO_ERROR) {
2555        struct audio_port_config newConfig;
2556        audioPortConfig->toAudioPortConfig(&newConfig, config);
2557        status = mpClientInterface->setAudioPortConfig(&newConfig, 0);
2558    }
2559    if (status != NO_ERROR) {
2560        audioPortConfig->applyAudioPortConfig(&backupConfig);
2561    }
2562
2563    return status;
2564}
2565
2566void AudioPolicyManager::clearAudioPatches(uid_t uid)
2567{
2568    for (ssize_t i = 0; i < (ssize_t)mAudioPatches.size(); i++)  {
2569        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(i);
2570        if (patchDesc->mUid == uid) {
2571            // releaseAudioPatch() removes the patch from mAudioPatches
2572            if (releaseAudioPatch(mAudioPatches.keyAt(i), uid) == NO_ERROR) {
2573                i--;
2574            }
2575        }
2576    }
2577}
2578
2579status_t AudioPolicyManager::acquireSoundTriggerSession(audio_session_t *session,
2580                                       audio_io_handle_t *ioHandle,
2581                                       audio_devices_t *device)
2582{
2583    *session = (audio_session_t)mpClientInterface->newAudioUniqueId();
2584    *ioHandle = (audio_io_handle_t)mpClientInterface->newAudioUniqueId();
2585    *device = getDeviceForInputSource(AUDIO_SOURCE_HOTWORD);
2586
2587    mSoundTriggerSessions.add(*session, *ioHandle);
2588
2589    return NO_ERROR;
2590}
2591
2592status_t AudioPolicyManager::releaseSoundTriggerSession(audio_session_t session)
2593{
2594    ssize_t index = mSoundTriggerSessions.indexOfKey(session);
2595    if (index < 0) {
2596        ALOGW("acquireSoundTriggerSession() session %d not registered", session);
2597        return BAD_VALUE;
2598    }
2599
2600    mSoundTriggerSessions.removeItem(session);
2601    return NO_ERROR;
2602}
2603
2604status_t AudioPolicyManager::addAudioPatch(audio_patch_handle_t handle,
2605                                           const sp<AudioPatch>& patch)
2606{
2607    ssize_t index = mAudioPatches.indexOfKey(handle);
2608
2609    if (index >= 0) {
2610        ALOGW("addAudioPatch() patch %d already in", handle);
2611        return ALREADY_EXISTS;
2612    }
2613    mAudioPatches.add(handle, patch);
2614    ALOGV("addAudioPatch() handle %d af handle %d num_sources %d num_sinks %d source handle %d"
2615            "sink handle %d",
2616          handle, patch->mAfPatchHandle, patch->mPatch.num_sources, patch->mPatch.num_sinks,
2617          patch->mPatch.sources[0].id, patch->mPatch.sinks[0].id);
2618    return NO_ERROR;
2619}
2620
2621status_t AudioPolicyManager::removeAudioPatch(audio_patch_handle_t handle)
2622{
2623    ssize_t index = mAudioPatches.indexOfKey(handle);
2624
2625    if (index < 0) {
2626        ALOGW("removeAudioPatch() patch %d not in", handle);
2627        return ALREADY_EXISTS;
2628    }
2629    ALOGV("removeAudioPatch() handle %d af handle %d", handle,
2630                      mAudioPatches.valueAt(index)->mAfPatchHandle);
2631    mAudioPatches.removeItemsAt(index);
2632    return NO_ERROR;
2633}
2634
2635// ----------------------------------------------------------------------------
2636// AudioPolicyManager
2637// ----------------------------------------------------------------------------
2638
2639uint32_t AudioPolicyManager::nextUniqueId()
2640{
2641    return android_atomic_inc(&mNextUniqueId);
2642}
2643
2644uint32_t AudioPolicyManager::nextAudioPortGeneration()
2645{
2646    return android_atomic_inc(&mAudioPortGeneration);
2647}
2648
2649AudioPolicyManager::AudioPolicyManager(AudioPolicyClientInterface *clientInterface)
2650    :
2651#ifdef AUDIO_POLICY_TEST
2652    Thread(false),
2653#endif //AUDIO_POLICY_TEST
2654    mPrimaryOutput((audio_io_handle_t)0),
2655    mPhoneState(AUDIO_MODE_NORMAL),
2656    mLimitRingtoneVolume(false), mLastVoiceVolume(-1.0f),
2657    mTotalEffectsCpuLoad(0), mTotalEffectsMemory(0),
2658    mA2dpSuspended(false),
2659    mSpeakerDrcEnabled(false), mNextUniqueId(1),
2660    mAudioPortGeneration(1),
2661    mForceDeepBufferForMedia(false)
2662{
2663    char propValue[PROPERTY_VALUE_MAX];
2664    if (property_get("ro.audio.media_deep_buffer", propValue, "0")) {
2665        mForceDeepBufferForMedia = atoi(propValue);
2666    }
2667
2668    mUidCached = getuid();
2669    mpClientInterface = clientInterface;
2670
2671    for (int i = 0; i < AUDIO_POLICY_FORCE_USE_CNT; i++) {
2672        mForceUse[i] = AUDIO_POLICY_FORCE_NONE;
2673    }
2674
2675    mDefaultOutputDevice = new DeviceDescriptor(String8(""), AUDIO_DEVICE_OUT_SPEAKER);
2676    if (loadAudioPolicyConfig(AUDIO_POLICY_VENDOR_CONFIG_FILE) != NO_ERROR) {
2677        if (loadAudioPolicyConfig(AUDIO_POLICY_CONFIG_FILE) != NO_ERROR) {
2678            ALOGE("could not load audio policy configuration file, setting defaults");
2679            defaultAudioPolicyConfig();
2680        }
2681    }
2682    // mAvailableOutputDevices and mAvailableInputDevices now contain all attached devices
2683
2684    // must be done after reading the policy
2685    initializeVolumeCurves();
2686
2687    // open all output streams needed to access attached devices
2688    audio_devices_t outputDeviceTypes = mAvailableOutputDevices.types();
2689    audio_devices_t inputDeviceTypes = mAvailableInputDevices.types() & ~AUDIO_DEVICE_BIT_IN;
2690    for (size_t i = 0; i < mHwModules.size(); i++) {
2691        mHwModules[i]->mHandle = mpClientInterface->loadHwModule(mHwModules[i]->mName);
2692        if (mHwModules[i]->mHandle == 0) {
2693            ALOGW("could not open HW module %s", mHwModules[i]->mName);
2694            continue;
2695        }
2696        // open all output streams needed to access attached devices
2697        // except for direct output streams that are only opened when they are actually
2698        // required by an app.
2699        // This also validates mAvailableOutputDevices list
2700        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
2701        {
2702            const sp<IOProfile> outProfile = mHwModules[i]->mOutputProfiles[j];
2703
2704            if (outProfile->mSupportedDevices.isEmpty()) {
2705                ALOGW("Output profile contains no device on module %s", mHwModules[i]->mName);
2706                continue;
2707            }
2708
2709            if ((outProfile->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) != 0) {
2710                continue;
2711            }
2712            audio_devices_t profileType = outProfile->mSupportedDevices.types();
2713            if ((profileType & mDefaultOutputDevice->mDeviceType) != AUDIO_DEVICE_NONE) {
2714                profileType = mDefaultOutputDevice->mDeviceType;
2715            } else {
2716                // chose first device present in mSupportedDevices also part of
2717                // outputDeviceTypes
2718                for (size_t k = 0; k  < outProfile->mSupportedDevices.size(); k++) {
2719                    profileType = outProfile->mSupportedDevices[k]->mDeviceType;
2720                    if ((profileType & outputDeviceTypes) != 0) {
2721                        break;
2722                    }
2723                }
2724            }
2725            if ((profileType & outputDeviceTypes) == 0) {
2726                continue;
2727            }
2728            sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(outProfile);
2729
2730            outputDesc->mDevice = profileType;
2731            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
2732            config.sample_rate = outputDesc->mSamplingRate;
2733            config.channel_mask = outputDesc->mChannelMask;
2734            config.format = outputDesc->mFormat;
2735            audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
2736            status_t status = mpClientInterface->openOutput(outProfile->mModule->mHandle,
2737                                                            &output,
2738                                                            &config,
2739                                                            &outputDesc->mDevice,
2740                                                            String8(""),
2741                                                            &outputDesc->mLatency,
2742                                                            outputDesc->mFlags);
2743
2744            if (status != NO_ERROR) {
2745                ALOGW("Cannot open output stream for device %08x on hw module %s",
2746                      outputDesc->mDevice,
2747                      mHwModules[i]->mName);
2748            } else {
2749                outputDesc->mSamplingRate = config.sample_rate;
2750                outputDesc->mChannelMask = config.channel_mask;
2751                outputDesc->mFormat = config.format;
2752
2753                for (size_t k = 0; k  < outProfile->mSupportedDevices.size(); k++) {
2754                    audio_devices_t type = outProfile->mSupportedDevices[k]->mDeviceType;
2755                    ssize_t index =
2756                            mAvailableOutputDevices.indexOf(outProfile->mSupportedDevices[k]);
2757                    // give a valid ID to an attached device once confirmed it is reachable
2758                    if ((index >= 0) && (mAvailableOutputDevices[index]->mId == 0)) {
2759                        mAvailableOutputDevices[index]->mId = nextUniqueId();
2760                        mAvailableOutputDevices[index]->mModule = mHwModules[i];
2761                    }
2762                }
2763                if (mPrimaryOutput == 0 &&
2764                        outProfile->mFlags & AUDIO_OUTPUT_FLAG_PRIMARY) {
2765                    mPrimaryOutput = output;
2766                }
2767                addOutput(output, outputDesc);
2768                setOutputDevice(output,
2769                                outputDesc->mDevice,
2770                                true);
2771            }
2772        }
2773        // open input streams needed to access attached devices to validate
2774        // mAvailableInputDevices list
2775        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
2776        {
2777            const sp<IOProfile> inProfile = mHwModules[i]->mInputProfiles[j];
2778
2779            if (inProfile->mSupportedDevices.isEmpty()) {
2780                ALOGW("Input profile contains no device on module %s", mHwModules[i]->mName);
2781                continue;
2782            }
2783            // chose first device present in mSupportedDevices also part of
2784            // inputDeviceTypes
2785            audio_devices_t profileType = AUDIO_DEVICE_NONE;
2786            for (size_t k = 0; k  < inProfile->mSupportedDevices.size(); k++) {
2787                profileType = inProfile->mSupportedDevices[k]->mDeviceType;
2788                if (profileType & inputDeviceTypes) {
2789                    break;
2790                }
2791            }
2792            if ((profileType & inputDeviceTypes) == 0) {
2793                continue;
2794            }
2795            sp<AudioInputDescriptor> inputDesc = new AudioInputDescriptor(inProfile);
2796
2797            inputDesc->mInputSource = AUDIO_SOURCE_MIC;
2798            inputDesc->mDevice = profileType;
2799
2800            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
2801            config.sample_rate = inputDesc->mSamplingRate;
2802            config.channel_mask = inputDesc->mChannelMask;
2803            config.format = inputDesc->mFormat;
2804            audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
2805            status_t status = mpClientInterface->openInput(inProfile->mModule->mHandle,
2806                                                           &input,
2807                                                           &config,
2808                                                           &inputDesc->mDevice,
2809                                                           String8(""),
2810                                                           AUDIO_SOURCE_MIC,
2811                                                           AUDIO_INPUT_FLAG_NONE);
2812
2813            if (status == NO_ERROR) {
2814                for (size_t k = 0; k  < inProfile->mSupportedDevices.size(); k++) {
2815                    audio_devices_t type = inProfile->mSupportedDevices[k]->mDeviceType;
2816                    ssize_t index =
2817                            mAvailableInputDevices.indexOf(inProfile->mSupportedDevices[k]);
2818                    // give a valid ID to an attached device once confirmed it is reachable
2819                    if ((index >= 0) && (mAvailableInputDevices[index]->mId == 0)) {
2820                        mAvailableInputDevices[index]->mId = nextUniqueId();
2821                        mAvailableInputDevices[index]->mModule = mHwModules[i];
2822                    }
2823                }
2824                mpClientInterface->closeInput(input);
2825            } else {
2826                ALOGW("Cannot open input stream for device %08x on hw module %s",
2827                      inputDesc->mDevice,
2828                      mHwModules[i]->mName);
2829            }
2830        }
2831    }
2832    // make sure all attached devices have been allocated a unique ID
2833    for (size_t i = 0; i  < mAvailableOutputDevices.size();) {
2834        if (mAvailableOutputDevices[i]->mId == 0) {
2835            ALOGW("Input device %08x unreachable", mAvailableOutputDevices[i]->mDeviceType);
2836            mAvailableOutputDevices.remove(mAvailableOutputDevices[i]);
2837            continue;
2838        }
2839        i++;
2840    }
2841    for (size_t i = 0; i  < mAvailableInputDevices.size();) {
2842        if (mAvailableInputDevices[i]->mId == 0) {
2843            ALOGW("Input device %08x unreachable", mAvailableInputDevices[i]->mDeviceType);
2844            mAvailableInputDevices.remove(mAvailableInputDevices[i]);
2845            continue;
2846        }
2847        i++;
2848    }
2849    // make sure default device is reachable
2850    if (mAvailableOutputDevices.indexOf(mDefaultOutputDevice) < 0) {
2851        ALOGE("Default device %08x is unreachable", mDefaultOutputDevice->mDeviceType);
2852    }
2853
2854    ALOGE_IF((mPrimaryOutput == 0), "Failed to open primary output");
2855
2856    updateDevicesAndOutputs();
2857
2858#ifdef AUDIO_POLICY_TEST
2859    if (mPrimaryOutput != 0) {
2860        AudioParameter outputCmd = AudioParameter();
2861        outputCmd.addInt(String8("set_id"), 0);
2862        mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
2863
2864        mTestDevice = AUDIO_DEVICE_OUT_SPEAKER;
2865        mTestSamplingRate = 44100;
2866        mTestFormat = AUDIO_FORMAT_PCM_16_BIT;
2867        mTestChannels =  AUDIO_CHANNEL_OUT_STEREO;
2868        mTestLatencyMs = 0;
2869        mCurOutput = 0;
2870        mDirectOutput = false;
2871        for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
2872            mTestOutputs[i] = 0;
2873        }
2874
2875        const size_t SIZE = 256;
2876        char buffer[SIZE];
2877        snprintf(buffer, SIZE, "AudioPolicyManagerTest");
2878        run(buffer, ANDROID_PRIORITY_AUDIO);
2879    }
2880#endif //AUDIO_POLICY_TEST
2881}
2882
2883AudioPolicyManager::~AudioPolicyManager()
2884{
2885#ifdef AUDIO_POLICY_TEST
2886    exit();
2887#endif //AUDIO_POLICY_TEST
2888   for (size_t i = 0; i < mOutputs.size(); i++) {
2889        mpClientInterface->closeOutput(mOutputs.keyAt(i));
2890   }
2891   for (size_t i = 0; i < mInputs.size(); i++) {
2892        mpClientInterface->closeInput(mInputs.keyAt(i));
2893   }
2894   mAvailableOutputDevices.clear();
2895   mAvailableInputDevices.clear();
2896   mOutputs.clear();
2897   mInputs.clear();
2898   mHwModules.clear();
2899}
2900
2901status_t AudioPolicyManager::initCheck()
2902{
2903    return (mPrimaryOutput == 0) ? NO_INIT : NO_ERROR;
2904}
2905
2906#ifdef AUDIO_POLICY_TEST
2907bool AudioPolicyManager::threadLoop()
2908{
2909    ALOGV("entering threadLoop()");
2910    while (!exitPending())
2911    {
2912        String8 command;
2913        int valueInt;
2914        String8 value;
2915
2916        Mutex::Autolock _l(mLock);
2917        mWaitWorkCV.waitRelative(mLock, milliseconds(50));
2918
2919        command = mpClientInterface->getParameters(0, String8("test_cmd_policy"));
2920        AudioParameter param = AudioParameter(command);
2921
2922        if (param.getInt(String8("test_cmd_policy"), valueInt) == NO_ERROR &&
2923            valueInt != 0) {
2924            ALOGV("Test command %s received", command.string());
2925            String8 target;
2926            if (param.get(String8("target"), target) != NO_ERROR) {
2927                target = "Manager";
2928            }
2929            if (param.getInt(String8("test_cmd_policy_output"), valueInt) == NO_ERROR) {
2930                param.remove(String8("test_cmd_policy_output"));
2931                mCurOutput = valueInt;
2932            }
2933            if (param.get(String8("test_cmd_policy_direct"), value) == NO_ERROR) {
2934                param.remove(String8("test_cmd_policy_direct"));
2935                if (value == "false") {
2936                    mDirectOutput = false;
2937                } else if (value == "true") {
2938                    mDirectOutput = true;
2939                }
2940            }
2941            if (param.getInt(String8("test_cmd_policy_input"), valueInt) == NO_ERROR) {
2942                param.remove(String8("test_cmd_policy_input"));
2943                mTestInput = valueInt;
2944            }
2945
2946            if (param.get(String8("test_cmd_policy_format"), value) == NO_ERROR) {
2947                param.remove(String8("test_cmd_policy_format"));
2948                int format = AUDIO_FORMAT_INVALID;
2949                if (value == "PCM 16 bits") {
2950                    format = AUDIO_FORMAT_PCM_16_BIT;
2951                } else if (value == "PCM 8 bits") {
2952                    format = AUDIO_FORMAT_PCM_8_BIT;
2953                } else if (value == "Compressed MP3") {
2954                    format = AUDIO_FORMAT_MP3;
2955                }
2956                if (format != AUDIO_FORMAT_INVALID) {
2957                    if (target == "Manager") {
2958                        mTestFormat = format;
2959                    } else if (mTestOutputs[mCurOutput] != 0) {
2960                        AudioParameter outputParam = AudioParameter();
2961                        outputParam.addInt(String8("format"), format);
2962                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
2963                    }
2964                }
2965            }
2966            if (param.get(String8("test_cmd_policy_channels"), value) == NO_ERROR) {
2967                param.remove(String8("test_cmd_policy_channels"));
2968                int channels = 0;
2969
2970                if (value == "Channels Stereo") {
2971                    channels =  AUDIO_CHANNEL_OUT_STEREO;
2972                } else if (value == "Channels Mono") {
2973                    channels =  AUDIO_CHANNEL_OUT_MONO;
2974                }
2975                if (channels != 0) {
2976                    if (target == "Manager") {
2977                        mTestChannels = channels;
2978                    } else if (mTestOutputs[mCurOutput] != 0) {
2979                        AudioParameter outputParam = AudioParameter();
2980                        outputParam.addInt(String8("channels"), channels);
2981                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
2982                    }
2983                }
2984            }
2985            if (param.getInt(String8("test_cmd_policy_sampleRate"), valueInt) == NO_ERROR) {
2986                param.remove(String8("test_cmd_policy_sampleRate"));
2987                if (valueInt >= 0 && valueInt <= 96000) {
2988                    int samplingRate = valueInt;
2989                    if (target == "Manager") {
2990                        mTestSamplingRate = samplingRate;
2991                    } else if (mTestOutputs[mCurOutput] != 0) {
2992                        AudioParameter outputParam = AudioParameter();
2993                        outputParam.addInt(String8("sampling_rate"), samplingRate);
2994                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
2995                    }
2996                }
2997            }
2998
2999            if (param.get(String8("test_cmd_policy_reopen"), value) == NO_ERROR) {
3000                param.remove(String8("test_cmd_policy_reopen"));
3001
3002                sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
3003                mpClientInterface->closeOutput(mPrimaryOutput);
3004
3005                audio_module_handle_t moduleHandle = outputDesc->mModule->mHandle;
3006
3007                mOutputs.removeItem(mPrimaryOutput);
3008
3009                sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(NULL);
3010                outputDesc->mDevice = AUDIO_DEVICE_OUT_SPEAKER;
3011                audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3012                config.sample_rate = outputDesc->mSamplingRate;
3013                config.channel_mask = outputDesc->mChannelMask;
3014                config.format = outputDesc->mFormat;
3015                status_t status = mpClientInterface->openOutput(moduleHandle,
3016                                                                &mPrimaryOutput,
3017                                                                &config,
3018                                                                &outputDesc->mDevice,
3019                                                                String8(""),
3020                                                                &outputDesc->mLatency,
3021                                                                outputDesc->mFlags);
3022                if (status != NO_ERROR) {
3023                    ALOGE("Failed to reopen hardware output stream, "
3024                        "samplingRate: %d, format %d, channels %d",
3025                        outputDesc->mSamplingRate, outputDesc->mFormat, outputDesc->mChannelMask);
3026                } else {
3027                    outputDesc->mSamplingRate = config.sample_rate;
3028                    outputDesc->mChannelMask = config.channel_mask;
3029                    outputDesc->mFormat = config.format;
3030                    AudioParameter outputCmd = AudioParameter();
3031                    outputCmd.addInt(String8("set_id"), 0);
3032                    mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
3033                    addOutput(mPrimaryOutput, outputDesc);
3034                }
3035            }
3036
3037
3038            mpClientInterface->setParameters(0, String8("test_cmd_policy="));
3039        }
3040    }
3041    return false;
3042}
3043
3044void AudioPolicyManager::exit()
3045{
3046    {
3047        AutoMutex _l(mLock);
3048        requestExit();
3049        mWaitWorkCV.signal();
3050    }
3051    requestExitAndWait();
3052}
3053
3054int AudioPolicyManager::testOutputIndex(audio_io_handle_t output)
3055{
3056    for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
3057        if (output == mTestOutputs[i]) return i;
3058    }
3059    return 0;
3060}
3061#endif //AUDIO_POLICY_TEST
3062
3063// ---
3064
3065void AudioPolicyManager::addOutput(audio_io_handle_t output, sp<AudioOutputDescriptor> outputDesc)
3066{
3067    outputDesc->mIoHandle = output;
3068    outputDesc->mId = nextUniqueId();
3069    mOutputs.add(output, outputDesc);
3070    nextAudioPortGeneration();
3071}
3072
3073void AudioPolicyManager::addInput(audio_io_handle_t input, sp<AudioInputDescriptor> inputDesc)
3074{
3075    inputDesc->mIoHandle = input;
3076    inputDesc->mId = nextUniqueId();
3077    mInputs.add(input, inputDesc);
3078    nextAudioPortGeneration();
3079}
3080
3081void AudioPolicyManager::findIoHandlesByAddress(sp<AudioOutputDescriptor> desc /*in*/,
3082        const String8 address /*in*/,
3083        SortedVector<audio_io_handle_t>& outputs /*out*/) {
3084    // look for a match on the given address on the addresses of the outputs:
3085    // find the address by finding the patch that maps to this output
3086    ssize_t patchIdx = mAudioPatches.indexOfKey(desc->mPatchHandle);
3087    //ALOGV("    inspecting output %d (patch %d) for supported device=0x%x",
3088    //        outputIdx, patchIdx,  desc->mProfile->mSupportedDevices.types());
3089    if (patchIdx >= 0) {
3090        const sp<AudioPatch> patchDesc = mAudioPatches.valueAt(patchIdx);
3091        const int numSinks = patchDesc->mPatch.num_sinks;
3092        for (ssize_t j=0; j < numSinks; j++) {
3093            if (patchDesc->mPatch.sinks[j].type == AUDIO_PORT_TYPE_DEVICE) {
3094                const char* patchAddr =
3095                        patchDesc->mPatch.sinks[j].ext.device.address;
3096                if (strncmp(patchAddr,
3097                        address.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN) == 0) {
3098                    ALOGV("findIoHandlesByAddress(): adding opened output %d on same address %s",
3099                            desc->mIoHandle,  patchDesc->mPatch.sinks[j].ext.device.address);
3100                    outputs.add(desc->mIoHandle);
3101                    break;
3102                }
3103            }
3104        }
3105    }
3106}
3107
3108status_t AudioPolicyManager::checkOutputsForDevice(const sp<DeviceDescriptor> devDesc,
3109                                                       audio_policy_dev_state_t state,
3110                                                       SortedVector<audio_io_handle_t>& outputs,
3111                                                       const String8 address)
3112{
3113    audio_devices_t device = devDesc->mDeviceType;
3114    sp<AudioOutputDescriptor> desc;
3115    // erase all current sample rates, formats and channel masks
3116    devDesc->clearCapabilities();
3117
3118    if (state == AUDIO_POLICY_DEVICE_STATE_AVAILABLE) {
3119        // first list already open outputs that can be routed to this device
3120        for (size_t i = 0; i < mOutputs.size(); i++) {
3121            desc = mOutputs.valueAt(i);
3122            if (!desc->isDuplicated() && (desc->mProfile->mSupportedDevices.types() & device)) {
3123                if (!deviceDistinguishesOnAddress(device)) {
3124                    ALOGV("checkOutputsForDevice(): adding opened output %d", mOutputs.keyAt(i));
3125                    outputs.add(mOutputs.keyAt(i));
3126                } else {
3127                    ALOGV("  checking address match due to device 0x%x", device);
3128                    findIoHandlesByAddress(desc, address, outputs);
3129                }
3130            }
3131        }
3132        // then look for output profiles that can be routed to this device
3133        SortedVector< sp<IOProfile> > profiles;
3134        for (size_t i = 0; i < mHwModules.size(); i++)
3135        {
3136            if (mHwModules[i]->mHandle == 0) {
3137                continue;
3138            }
3139            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
3140            {
3141                if (mHwModules[i]->mOutputProfiles[j]->mSupportedDevices.types() & device) {
3142                    ALOGV("checkOutputsForDevice(): adding profile %zu from module %zu", j, i);
3143                    profiles.add(mHwModules[i]->mOutputProfiles[j]);
3144                }
3145            }
3146        }
3147
3148        ALOGV("  found %d profiles, %d outputs", profiles.size(), outputs.size());
3149
3150        if (profiles.isEmpty() && outputs.isEmpty()) {
3151            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
3152            return BAD_VALUE;
3153        }
3154
3155        // open outputs for matching profiles if needed. Direct outputs are also opened to
3156        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
3157        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
3158            sp<IOProfile> profile = profiles[profile_index];
3159
3160            // nothing to do if one output is already opened for this profile
3161            size_t j;
3162            for (j = 0; j < outputs.size(); j++) {
3163                desc = mOutputs.valueFor(outputs.itemAt(j));
3164                if (!desc->isDuplicated() && desc->mProfile == profile) {
3165                    // matching profile: save the sample rates, format and channel masks supported
3166                    // by the profile in our device descriptor
3167                    devDesc->importAudioPort(profile);
3168                    break;
3169                }
3170            }
3171            if (j != outputs.size()) {
3172                continue;
3173            }
3174
3175            ALOGV("opening output for device %08x with params %s profile %p",
3176                                                      device, address.string(), profile.get());
3177            desc = new AudioOutputDescriptor(profile);
3178            desc->mDevice = device;
3179            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3180            config.sample_rate = desc->mSamplingRate;
3181            config.channel_mask = desc->mChannelMask;
3182            config.format = desc->mFormat;
3183            config.offload_info.sample_rate = desc->mSamplingRate;
3184            config.offload_info.channel_mask = desc->mChannelMask;
3185            config.offload_info.format = desc->mFormat;
3186            audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
3187            status_t status = mpClientInterface->openOutput(profile->mModule->mHandle,
3188                                                            &output,
3189                                                            &config,
3190                                                            &desc->mDevice,
3191                                                            address,
3192                                                            &desc->mLatency,
3193                                                            desc->mFlags);
3194            if (status == NO_ERROR) {
3195                desc->mSamplingRate = config.sample_rate;
3196                desc->mChannelMask = config.channel_mask;
3197                desc->mFormat = config.format;
3198
3199                // Here is where the out_set_parameters() for card & device gets called
3200                if (!address.isEmpty()) {
3201                    char *param = audio_device_address_to_parameter(device, address);
3202                    mpClientInterface->setParameters(output, String8(param));
3203                    free(param);
3204                }
3205
3206                // Here is where we step through and resolve any "dynamic" fields
3207                String8 reply;
3208                char *value;
3209                if (profile->mSamplingRates[0] == 0) {
3210                    reply = mpClientInterface->getParameters(output,
3211                                            String8(AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES));
3212                    ALOGV("checkOutputsForDevice() supported sampling rates %s",
3213                              reply.string());
3214                    value = strpbrk((char *)reply.string(), "=");
3215                    if (value != NULL) {
3216                        profile->loadSamplingRates(value + 1);
3217                    }
3218                }
3219                if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3220                    reply = mpClientInterface->getParameters(output,
3221                                                   String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS));
3222                    ALOGV("checkOutputsForDevice() supported formats %s",
3223                              reply.string());
3224                    value = strpbrk((char *)reply.string(), "=");
3225                    if (value != NULL) {
3226                        profile->loadFormats(value + 1);
3227                    }
3228                }
3229                if (profile->mChannelMasks[0] == 0) {
3230                    reply = mpClientInterface->getParameters(output,
3231                                                  String8(AUDIO_PARAMETER_STREAM_SUP_CHANNELS));
3232                    ALOGV("checkOutputsForDevice() supported channel masks %s",
3233                              reply.string());
3234                    value = strpbrk((char *)reply.string(), "=");
3235                    if (value != NULL) {
3236                        profile->loadOutChannels(value + 1);
3237                    }
3238                }
3239                if (((profile->mSamplingRates[0] == 0) &&
3240                         (profile->mSamplingRates.size() < 2)) ||
3241                     ((profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) &&
3242                         (profile->mFormats.size() < 2)) ||
3243                     ((profile->mChannelMasks[0] == 0) &&
3244                         (profile->mChannelMasks.size() < 2))) {
3245                    ALOGW("checkOutputsForDevice() missing param");
3246                    mpClientInterface->closeOutput(output);
3247                    output = AUDIO_IO_HANDLE_NONE;
3248                } else if (profile->mSamplingRates[0] == 0 || profile->mFormats[0] == 0 ||
3249                            profile->mChannelMasks[0] == 0) {
3250                    mpClientInterface->closeOutput(output);
3251                    config.sample_rate = profile->pickSamplingRate();
3252                    config.channel_mask = profile->pickChannelMask();
3253                    config.format = profile->pickFormat();
3254                    config.offload_info.sample_rate = config.sample_rate;
3255                    config.offload_info.channel_mask = config.channel_mask;
3256                    config.offload_info.format = config.format;
3257                    status = mpClientInterface->openOutput(profile->mModule->mHandle,
3258                                                           &output,
3259                                                           &config,
3260                                                           &desc->mDevice,
3261                                                           address,
3262                                                           &desc->mLatency,
3263                                                           desc->mFlags);
3264                    if (status == NO_ERROR) {
3265                        desc->mSamplingRate = config.sample_rate;
3266                        desc->mChannelMask = config.channel_mask;
3267                        desc->mFormat = config.format;
3268                    } else {
3269                        output = AUDIO_IO_HANDLE_NONE;
3270                    }
3271                }
3272
3273                if (output != AUDIO_IO_HANDLE_NONE) {
3274                    addOutput(output, desc);
3275                    if ((desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) == 0) {
3276                        audio_io_handle_t duplicatedOutput = AUDIO_IO_HANDLE_NONE;
3277
3278                        // set initial stream volume for device
3279                        applyStreamVolumes(output, device, 0, true);
3280
3281                        //TODO: configure audio effect output stage here
3282
3283                        // open a duplicating output thread for the new output and the primary output
3284                        duplicatedOutput = mpClientInterface->openDuplicateOutput(output,
3285                                                                                  mPrimaryOutput);
3286                        if (duplicatedOutput != AUDIO_IO_HANDLE_NONE) {
3287                            // add duplicated output descriptor
3288                            sp<AudioOutputDescriptor> dupOutputDesc =
3289                                    new AudioOutputDescriptor(NULL);
3290                            dupOutputDesc->mOutput1 = mOutputs.valueFor(mPrimaryOutput);
3291                            dupOutputDesc->mOutput2 = mOutputs.valueFor(output);
3292                            dupOutputDesc->mSamplingRate = desc->mSamplingRate;
3293                            dupOutputDesc->mFormat = desc->mFormat;
3294                            dupOutputDesc->mChannelMask = desc->mChannelMask;
3295                            dupOutputDesc->mLatency = desc->mLatency;
3296                            addOutput(duplicatedOutput, dupOutputDesc);
3297                            applyStreamVolumes(duplicatedOutput, device, 0, true);
3298                        } else {
3299                            ALOGW("checkOutputsForDevice() could not open dup output for %d and %d",
3300                                    mPrimaryOutput, output);
3301                            mpClientInterface->closeOutput(output);
3302                            mOutputs.removeItem(output);
3303                            nextAudioPortGeneration();
3304                            output = AUDIO_IO_HANDLE_NONE;
3305                        }
3306                    }
3307                }
3308            } else {
3309                output = AUDIO_IO_HANDLE_NONE;
3310            }
3311            if (output == AUDIO_IO_HANDLE_NONE) {
3312                ALOGW("checkOutputsForDevice() could not open output for device %x", device);
3313                profiles.removeAt(profile_index);
3314                profile_index--;
3315            } else {
3316                outputs.add(output);
3317                devDesc->importAudioPort(profile);
3318
3319                if (deviceDistinguishesOnAddress(device)) {
3320                    ALOGV("checkOutputsForDevice(): setOutputDevice(dev=0x%x, addr=%s)",
3321                            device, address.string());
3322                    setOutputDevice(output, device, true/*force*/, 0/*delay*/,
3323                            NULL/*patch handle*/, address.string());
3324                }
3325                ALOGV("checkOutputsForDevice(): adding output %d", output);
3326            }
3327        }
3328
3329        if (profiles.isEmpty()) {
3330            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
3331            return BAD_VALUE;
3332        }
3333    } else { // Disconnect
3334        // check if one opened output is not needed any more after disconnecting one device
3335        for (size_t i = 0; i < mOutputs.size(); i++) {
3336            desc = mOutputs.valueAt(i);
3337            if (!desc->isDuplicated()) {
3338                if  (!(desc->mProfile->mSupportedDevices.types()
3339                        & mAvailableOutputDevices.types())) {
3340                    ALOGV("checkOutputsForDevice(): disconnecting adding output %d",
3341                            mOutputs.keyAt(i));
3342                    outputs.add(mOutputs.keyAt(i));
3343                } else if (deviceDistinguishesOnAddress(device) &&
3344                        // exact match on device
3345                        (desc->mProfile->mSupportedDevices.types() == device)) {
3346                    findIoHandlesByAddress(desc, address, outputs);
3347                }
3348            }
3349        }
3350        // Clear any profiles associated with the disconnected device.
3351        for (size_t i = 0; i < mHwModules.size(); i++)
3352        {
3353            if (mHwModules[i]->mHandle == 0) {
3354                continue;
3355            }
3356            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
3357            {
3358                sp<IOProfile> profile = mHwModules[i]->mOutputProfiles[j];
3359                if (profile->mSupportedDevices.types() & device) {
3360                    ALOGV("checkOutputsForDevice(): "
3361                            "clearing direct output profile %zu on module %zu", j, i);
3362                    if (profile->mSamplingRates[0] == 0) {
3363                        profile->mSamplingRates.clear();
3364                        profile->mSamplingRates.add(0);
3365                    }
3366                    if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3367                        profile->mFormats.clear();
3368                        profile->mFormats.add(AUDIO_FORMAT_DEFAULT);
3369                    }
3370                    if (profile->mChannelMasks[0] == 0) {
3371                        profile->mChannelMasks.clear();
3372                        profile->mChannelMasks.add(0);
3373                    }
3374                }
3375            }
3376        }
3377    }
3378    return NO_ERROR;
3379}
3380
3381status_t AudioPolicyManager::checkInputsForDevice(audio_devices_t device,
3382                                                      audio_policy_dev_state_t state,
3383                                                      SortedVector<audio_io_handle_t>& inputs,
3384                                                      const String8 address)
3385{
3386    sp<AudioInputDescriptor> desc;
3387    if (state == AUDIO_POLICY_DEVICE_STATE_AVAILABLE) {
3388        // first list already open inputs that can be routed to this device
3389        for (size_t input_index = 0; input_index < mInputs.size(); input_index++) {
3390            desc = mInputs.valueAt(input_index);
3391            if (desc->mProfile->mSupportedDevices.types() & (device & ~AUDIO_DEVICE_BIT_IN)) {
3392                ALOGV("checkInputsForDevice(): adding opened input %d", mInputs.keyAt(input_index));
3393               inputs.add(mInputs.keyAt(input_index));
3394            }
3395        }
3396
3397        // then look for input profiles that can be routed to this device
3398        SortedVector< sp<IOProfile> > profiles;
3399        for (size_t module_idx = 0; module_idx < mHwModules.size(); module_idx++)
3400        {
3401            if (mHwModules[module_idx]->mHandle == 0) {
3402                continue;
3403            }
3404            for (size_t profile_index = 0;
3405                 profile_index < mHwModules[module_idx]->mInputProfiles.size();
3406                 profile_index++)
3407            {
3408                if (mHwModules[module_idx]->mInputProfiles[profile_index]->mSupportedDevices.types()
3409                        & (device & ~AUDIO_DEVICE_BIT_IN)) {
3410                    ALOGV("checkInputsForDevice(): adding profile %zu from module %zu",
3411                          profile_index, module_idx);
3412                    profiles.add(mHwModules[module_idx]->mInputProfiles[profile_index]);
3413                }
3414            }
3415        }
3416
3417        if (profiles.isEmpty() && inputs.isEmpty()) {
3418            ALOGW("checkInputsForDevice(): No input available for device 0x%X", device);
3419            return BAD_VALUE;
3420        }
3421
3422        // open inputs for matching profiles if needed. Direct inputs are also opened to
3423        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
3424        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
3425
3426            sp<IOProfile> profile = profiles[profile_index];
3427            // nothing to do if one input is already opened for this profile
3428            size_t input_index;
3429            for (input_index = 0; input_index < mInputs.size(); input_index++) {
3430                desc = mInputs.valueAt(input_index);
3431                if (desc->mProfile == profile) {
3432                    break;
3433                }
3434            }
3435            if (input_index != mInputs.size()) {
3436                continue;
3437            }
3438
3439            ALOGV("opening input for device 0x%X with params %s", device, address.string());
3440            desc = new AudioInputDescriptor(profile);
3441            desc->mDevice = device;
3442            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3443            config.sample_rate = desc->mSamplingRate;
3444            config.channel_mask = desc->mChannelMask;
3445            config.format = desc->mFormat;
3446            audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
3447            status_t status = mpClientInterface->openInput(profile->mModule->mHandle,
3448                                                           &input,
3449                                                           &config,
3450                                                           &desc->mDevice,
3451                                                           address,
3452                                                           AUDIO_SOURCE_MIC,
3453                                                           AUDIO_INPUT_FLAG_NONE /*FIXME*/);
3454
3455            if (status == NO_ERROR) {
3456                desc->mSamplingRate = config.sample_rate;
3457                desc->mChannelMask = config.channel_mask;
3458                desc->mFormat = config.format;
3459
3460                if (!address.isEmpty()) {
3461                    char *param = audio_device_address_to_parameter(device, address);
3462                    mpClientInterface->setParameters(input, String8(param));
3463                    free(param);
3464                }
3465
3466                // Here is where we step through and resolve any "dynamic" fields
3467                String8 reply;
3468                char *value;
3469                if (profile->mSamplingRates[0] == 0) {
3470                    reply = mpClientInterface->getParameters(input,
3471                                            String8(AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES));
3472                    ALOGV("checkInputsForDevice() direct input sup sampling rates %s",
3473                              reply.string());
3474                    value = strpbrk((char *)reply.string(), "=");
3475                    if (value != NULL) {
3476                        profile->loadSamplingRates(value + 1);
3477                    }
3478                }
3479                if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3480                    reply = mpClientInterface->getParameters(input,
3481                                                   String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS));
3482                    ALOGV("checkInputsForDevice() direct input sup formats %s", reply.string());
3483                    value = strpbrk((char *)reply.string(), "=");
3484                    if (value != NULL) {
3485                        profile->loadFormats(value + 1);
3486                    }
3487                }
3488                if (profile->mChannelMasks[0] == 0) {
3489                    reply = mpClientInterface->getParameters(input,
3490                                                  String8(AUDIO_PARAMETER_STREAM_SUP_CHANNELS));
3491                    ALOGV("checkInputsForDevice() direct input sup channel masks %s",
3492                              reply.string());
3493                    value = strpbrk((char *)reply.string(), "=");
3494                    if (value != NULL) {
3495                        profile->loadInChannels(value + 1);
3496                    }
3497                }
3498                if (((profile->mSamplingRates[0] == 0) && (profile->mSamplingRates.size() < 2)) ||
3499                     ((profile->mFormats[0] == 0) && (profile->mFormats.size() < 2)) ||
3500                     ((profile->mChannelMasks[0] == 0) && (profile->mChannelMasks.size() < 2))) {
3501                    ALOGW("checkInputsForDevice() direct input missing param");
3502                    mpClientInterface->closeInput(input);
3503                    input = AUDIO_IO_HANDLE_NONE;
3504                }
3505
3506                if (input != 0) {
3507                    addInput(input, desc);
3508                }
3509            } // endif input != 0
3510
3511            if (input == AUDIO_IO_HANDLE_NONE) {
3512                ALOGW("checkInputsForDevice() could not open input for device 0x%X", device);
3513                profiles.removeAt(profile_index);
3514                profile_index--;
3515            } else {
3516                inputs.add(input);
3517                ALOGV("checkInputsForDevice(): adding input %d", input);
3518            }
3519        } // end scan profiles
3520
3521        if (profiles.isEmpty()) {
3522            ALOGW("checkInputsForDevice(): No input available for device 0x%X", device);
3523            return BAD_VALUE;
3524        }
3525    } else {
3526        // Disconnect
3527        // check if one opened input is not needed any more after disconnecting one device
3528        for (size_t input_index = 0; input_index < mInputs.size(); input_index++) {
3529            desc = mInputs.valueAt(input_index);
3530            if (!(desc->mProfile->mSupportedDevices.types() & mAvailableInputDevices.types())) {
3531                ALOGV("checkInputsForDevice(): disconnecting adding input %d",
3532                      mInputs.keyAt(input_index));
3533                inputs.add(mInputs.keyAt(input_index));
3534            }
3535        }
3536        // Clear any profiles associated with the disconnected device.
3537        for (size_t module_index = 0; module_index < mHwModules.size(); module_index++) {
3538            if (mHwModules[module_index]->mHandle == 0) {
3539                continue;
3540            }
3541            for (size_t profile_index = 0;
3542                 profile_index < mHwModules[module_index]->mInputProfiles.size();
3543                 profile_index++) {
3544                sp<IOProfile> profile = mHwModules[module_index]->mInputProfiles[profile_index];
3545                if (profile->mSupportedDevices.types() & device) {
3546                    ALOGV("checkInputsForDevice(): clearing direct input profile %zu on module %zu",
3547                          profile_index, module_index);
3548                    if (profile->mSamplingRates[0] == 0) {
3549                        profile->mSamplingRates.clear();
3550                        profile->mSamplingRates.add(0);
3551                    }
3552                    if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3553                        profile->mFormats.clear();
3554                        profile->mFormats.add(AUDIO_FORMAT_DEFAULT);
3555                    }
3556                    if (profile->mChannelMasks[0] == 0) {
3557                        profile->mChannelMasks.clear();
3558                        profile->mChannelMasks.add(0);
3559                    }
3560                }
3561            }
3562        }
3563    } // end disconnect
3564
3565    return NO_ERROR;
3566}
3567
3568
3569void AudioPolicyManager::closeOutput(audio_io_handle_t output)
3570{
3571    ALOGV("closeOutput(%d)", output);
3572
3573    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
3574    if (outputDesc == NULL) {
3575        ALOGW("closeOutput() unknown output %d", output);
3576        return;
3577    }
3578
3579    // look for duplicated outputs connected to the output being removed.
3580    for (size_t i = 0; i < mOutputs.size(); i++) {
3581        sp<AudioOutputDescriptor> dupOutputDesc = mOutputs.valueAt(i);
3582        if (dupOutputDesc->isDuplicated() &&
3583                (dupOutputDesc->mOutput1 == outputDesc ||
3584                dupOutputDesc->mOutput2 == outputDesc)) {
3585            sp<AudioOutputDescriptor> outputDesc2;
3586            if (dupOutputDesc->mOutput1 == outputDesc) {
3587                outputDesc2 = dupOutputDesc->mOutput2;
3588            } else {
3589                outputDesc2 = dupOutputDesc->mOutput1;
3590            }
3591            // As all active tracks on duplicated output will be deleted,
3592            // and as they were also referenced on the other output, the reference
3593            // count for their stream type must be adjusted accordingly on
3594            // the other output.
3595            for (int j = 0; j < AUDIO_STREAM_CNT; j++) {
3596                int refCount = dupOutputDesc->mRefCount[j];
3597                outputDesc2->changeRefCount((audio_stream_type_t)j,-refCount);
3598            }
3599            audio_io_handle_t duplicatedOutput = mOutputs.keyAt(i);
3600            ALOGV("closeOutput() closing also duplicated output %d", duplicatedOutput);
3601
3602            mpClientInterface->closeOutput(duplicatedOutput);
3603            mOutputs.removeItem(duplicatedOutput);
3604        }
3605    }
3606
3607    nextAudioPortGeneration();
3608
3609    ssize_t index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
3610    if (index >= 0) {
3611        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3612        status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
3613        mAudioPatches.removeItemsAt(index);
3614        mpClientInterface->onAudioPatchListUpdate();
3615    }
3616
3617    AudioParameter param;
3618    param.add(String8("closing"), String8("true"));
3619    mpClientInterface->setParameters(output, param.toString());
3620
3621    mpClientInterface->closeOutput(output);
3622    mOutputs.removeItem(output);
3623    mPreviousOutputs = mOutputs;
3624}
3625
3626void AudioPolicyManager::closeInput(audio_io_handle_t input)
3627{
3628    ALOGV("closeInput(%d)", input);
3629
3630    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
3631    if (inputDesc == NULL) {
3632        ALOGW("closeInput() unknown input %d", input);
3633        return;
3634    }
3635
3636    nextAudioPortGeneration();
3637
3638    ssize_t index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
3639    if (index >= 0) {
3640        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3641        status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
3642        mAudioPatches.removeItemsAt(index);
3643        mpClientInterface->onAudioPatchListUpdate();
3644    }
3645
3646    mpClientInterface->closeInput(input);
3647    mInputs.removeItem(input);
3648}
3649
3650SortedVector<audio_io_handle_t> AudioPolicyManager::getOutputsForDevice(audio_devices_t device,
3651                        DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > openOutputs)
3652{
3653    SortedVector<audio_io_handle_t> outputs;
3654
3655    ALOGVV("getOutputsForDevice() device %04x", device);
3656    for (size_t i = 0; i < openOutputs.size(); i++) {
3657        ALOGVV("output %d isDuplicated=%d device=%04x",
3658                i, openOutputs.valueAt(i)->isDuplicated(), openOutputs.valueAt(i)->supportedDevices());
3659        if ((device & openOutputs.valueAt(i)->supportedDevices()) == device) {
3660            ALOGVV("getOutputsForDevice() found output %d", openOutputs.keyAt(i));
3661            outputs.add(openOutputs.keyAt(i));
3662        }
3663    }
3664    return outputs;
3665}
3666
3667bool AudioPolicyManager::vectorsEqual(SortedVector<audio_io_handle_t>& outputs1,
3668                                   SortedVector<audio_io_handle_t>& outputs2)
3669{
3670    if (outputs1.size() != outputs2.size()) {
3671        return false;
3672    }
3673    for (size_t i = 0; i < outputs1.size(); i++) {
3674        if (outputs1[i] != outputs2[i]) {
3675            return false;
3676        }
3677    }
3678    return true;
3679}
3680
3681void AudioPolicyManager::checkOutputForStrategy(routing_strategy strategy)
3682{
3683    audio_devices_t oldDevice = getDeviceForStrategy(strategy, true /*fromCache*/);
3684    audio_devices_t newDevice = getDeviceForStrategy(strategy, false /*fromCache*/);
3685    SortedVector<audio_io_handle_t> srcOutputs = getOutputsForDevice(oldDevice, mPreviousOutputs);
3686    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(newDevice, mOutputs);
3687
3688    if (!vectorsEqual(srcOutputs,dstOutputs)) {
3689        ALOGV("checkOutputForStrategy() strategy %d, moving from output %d to output %d",
3690              strategy, srcOutputs[0], dstOutputs[0]);
3691        // mute strategy while moving tracks from one output to another
3692        for (size_t i = 0; i < srcOutputs.size(); i++) {
3693            sp<AudioOutputDescriptor> desc = mOutputs.valueFor(srcOutputs[i]);
3694            if (desc->isStrategyActive(strategy)) {
3695                setStrategyMute(strategy, true, srcOutputs[i]);
3696                setStrategyMute(strategy, false, srcOutputs[i], MUTE_TIME_MS, newDevice);
3697            }
3698        }
3699
3700        // Move effects associated to this strategy from previous output to new output
3701        if (strategy == STRATEGY_MEDIA) {
3702            audio_io_handle_t fxOutput = selectOutputForEffects(dstOutputs);
3703            SortedVector<audio_io_handle_t> moved;
3704            for (size_t i = 0; i < mEffects.size(); i++) {
3705                sp<EffectDescriptor> effectDesc = mEffects.valueAt(i);
3706                if (effectDesc->mSession == AUDIO_SESSION_OUTPUT_MIX &&
3707                        effectDesc->mIo != fxOutput) {
3708                    if (moved.indexOf(effectDesc->mIo) < 0) {
3709                        ALOGV("checkOutputForStrategy() moving effect %d to output %d",
3710                              mEffects.keyAt(i), fxOutput);
3711                        mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, effectDesc->mIo,
3712                                                       fxOutput);
3713                        moved.add(effectDesc->mIo);
3714                    }
3715                    effectDesc->mIo = fxOutput;
3716                }
3717            }
3718        }
3719        // Move tracks associated to this strategy from previous output to new output
3720        for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
3721            if (getStrategy((audio_stream_type_t)i) == strategy) {
3722                mpClientInterface->invalidateStream((audio_stream_type_t)i);
3723            }
3724        }
3725    }
3726}
3727
3728void AudioPolicyManager::checkOutputForAllStrategies()
3729{
3730    if (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_SYSTEM_ENFORCED)
3731        checkOutputForStrategy(STRATEGY_ENFORCED_AUDIBLE);
3732    checkOutputForStrategy(STRATEGY_PHONE);
3733    if (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] != AUDIO_POLICY_FORCE_SYSTEM_ENFORCED)
3734        checkOutputForStrategy(STRATEGY_ENFORCED_AUDIBLE);
3735    checkOutputForStrategy(STRATEGY_SONIFICATION);
3736    checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
3737    checkOutputForStrategy(STRATEGY_MEDIA);
3738    checkOutputForStrategy(STRATEGY_DTMF);
3739}
3740
3741audio_io_handle_t AudioPolicyManager::getA2dpOutput()
3742{
3743    for (size_t i = 0; i < mOutputs.size(); i++) {
3744        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
3745        if (!outputDesc->isDuplicated() && outputDesc->device() & AUDIO_DEVICE_OUT_ALL_A2DP) {
3746            return mOutputs.keyAt(i);
3747        }
3748    }
3749
3750    return 0;
3751}
3752
3753void AudioPolicyManager::checkA2dpSuspend()
3754{
3755    audio_io_handle_t a2dpOutput = getA2dpOutput();
3756    if (a2dpOutput == 0) {
3757        mA2dpSuspended = false;
3758        return;
3759    }
3760
3761    bool isScoConnected =
3762            (mAvailableInputDevices.types() & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) != 0;
3763    // suspend A2DP output if:
3764    //      (NOT already suspended) &&
3765    //      ((SCO device is connected &&
3766    //       (forced usage for communication || for record is SCO))) ||
3767    //      (phone state is ringing || in call)
3768    //
3769    // restore A2DP output if:
3770    //      (Already suspended) &&
3771    //      ((SCO device is NOT connected ||
3772    //       (forced usage NOT for communication && NOT for record is SCO))) &&
3773    //      (phone state is NOT ringing && NOT in call)
3774    //
3775    if (mA2dpSuspended) {
3776        if ((!isScoConnected ||
3777             ((mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] != AUDIO_POLICY_FORCE_BT_SCO) &&
3778              (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] != AUDIO_POLICY_FORCE_BT_SCO))) &&
3779             ((mPhoneState != AUDIO_MODE_IN_CALL) &&
3780              (mPhoneState != AUDIO_MODE_RINGTONE))) {
3781
3782            mpClientInterface->restoreOutput(a2dpOutput);
3783            mA2dpSuspended = false;
3784        }
3785    } else {
3786        if ((isScoConnected &&
3787             ((mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] == AUDIO_POLICY_FORCE_BT_SCO) ||
3788              (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] == AUDIO_POLICY_FORCE_BT_SCO))) ||
3789             ((mPhoneState == AUDIO_MODE_IN_CALL) ||
3790              (mPhoneState == AUDIO_MODE_RINGTONE))) {
3791
3792            mpClientInterface->suspendOutput(a2dpOutput);
3793            mA2dpSuspended = true;
3794        }
3795    }
3796}
3797
3798audio_devices_t AudioPolicyManager::getNewOutputDevice(audio_io_handle_t output, bool fromCache)
3799{
3800    audio_devices_t device = AUDIO_DEVICE_NONE;
3801
3802    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
3803
3804    ssize_t index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
3805    if (index >= 0) {
3806        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3807        if (patchDesc->mUid != mUidCached) {
3808            ALOGV("getNewOutputDevice() device %08x forced by patch %d",
3809                  outputDesc->device(), outputDesc->mPatchHandle);
3810            return outputDesc->device();
3811        }
3812    }
3813
3814    // check the following by order of priority to request a routing change if necessary:
3815    // 1: the strategy enforced audible is active and enforced on the output:
3816    //      use device for strategy enforced audible
3817    // 2: we are in call or the strategy phone is active on the output:
3818    //      use device for strategy phone
3819    // 3: the strategy for enforced audible is active but not enforced on the output:
3820    //      use the device for strategy enforced audible
3821    // 4: the strategy sonification is active on the output:
3822    //      use device for strategy sonification
3823    // 5: the strategy "respectful" sonification is active on the output:
3824    //      use device for strategy "respectful" sonification
3825    // 6: the strategy media is active on the output:
3826    //      use device for strategy media
3827    // 7: the strategy DTMF is active on the output:
3828    //      use device for strategy DTMF
3829    if (outputDesc->isStrategyActive(STRATEGY_ENFORCED_AUDIBLE) &&
3830        mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_SYSTEM_ENFORCED) {
3831        device = getDeviceForStrategy(STRATEGY_ENFORCED_AUDIBLE, fromCache);
3832    } else if (isInCall() ||
3833                    outputDesc->isStrategyActive(STRATEGY_PHONE)) {
3834        device = getDeviceForStrategy(STRATEGY_PHONE, fromCache);
3835    } else if (outputDesc->isStrategyActive(STRATEGY_ENFORCED_AUDIBLE)) {
3836        device = getDeviceForStrategy(STRATEGY_ENFORCED_AUDIBLE, fromCache);
3837    } else if (outputDesc->isStrategyActive(STRATEGY_SONIFICATION)) {
3838        device = getDeviceForStrategy(STRATEGY_SONIFICATION, fromCache);
3839    } else if (outputDesc->isStrategyActive(STRATEGY_SONIFICATION_RESPECTFUL)) {
3840        device = getDeviceForStrategy(STRATEGY_SONIFICATION_RESPECTFUL, fromCache);
3841    } else if (outputDesc->isStrategyActive(STRATEGY_MEDIA)) {
3842        device = getDeviceForStrategy(STRATEGY_MEDIA, fromCache);
3843    } else if (outputDesc->isStrategyActive(STRATEGY_DTMF)) {
3844        device = getDeviceForStrategy(STRATEGY_DTMF, fromCache);
3845    }
3846
3847    ALOGV("getNewOutputDevice() selected device %x", device);
3848    return device;
3849}
3850
3851audio_devices_t AudioPolicyManager::getNewInputDevice(audio_io_handle_t input)
3852{
3853    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
3854
3855    ssize_t index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
3856    if (index >= 0) {
3857        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3858        if (patchDesc->mUid != mUidCached) {
3859            ALOGV("getNewInputDevice() device %08x forced by patch %d",
3860                  inputDesc->mDevice, inputDesc->mPatchHandle);
3861            return inputDesc->mDevice;
3862        }
3863    }
3864
3865    audio_devices_t device = getDeviceForInputSource(inputDesc->mInputSource);
3866
3867    ALOGV("getNewInputDevice() selected device %x", device);
3868    return device;
3869}
3870
3871uint32_t AudioPolicyManager::getStrategyForStream(audio_stream_type_t stream) {
3872    return (uint32_t)getStrategy(stream);
3873}
3874
3875audio_devices_t AudioPolicyManager::getDevicesForStream(audio_stream_type_t stream) {
3876    // By checking the range of stream before calling getStrategy, we avoid
3877    // getStrategy's behavior for invalid streams.  getStrategy would do a ALOGE
3878    // and then return STRATEGY_MEDIA, but we want to return the empty set.
3879    if (stream < (audio_stream_type_t) 0 || stream >= AUDIO_STREAM_CNT) {
3880        return AUDIO_DEVICE_NONE;
3881    }
3882    audio_devices_t devices;
3883    AudioPolicyManager::routing_strategy strategy = getStrategy(stream);
3884    devices = getDeviceForStrategy(strategy, true /*fromCache*/);
3885    SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(devices, mOutputs);
3886    for (size_t i = 0; i < outputs.size(); i++) {
3887        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(outputs[i]);
3888        if (outputDesc->isStrategyActive(strategy)) {
3889            devices = outputDesc->device();
3890            break;
3891        }
3892    }
3893
3894    /*Filter SPEAKER_SAFE out of results, as AudioService doesn't know about it
3895      and doesn't really need to.*/
3896    if (devices & AUDIO_DEVICE_OUT_SPEAKER_SAFE) {
3897        devices |= AUDIO_DEVICE_OUT_SPEAKER;
3898        devices &= ~AUDIO_DEVICE_OUT_SPEAKER_SAFE;
3899    }
3900
3901    return devices;
3902}
3903
3904AudioPolicyManager::routing_strategy AudioPolicyManager::getStrategy(
3905        audio_stream_type_t stream) {
3906    // stream to strategy mapping
3907    switch (stream) {
3908    case AUDIO_STREAM_VOICE_CALL:
3909    case AUDIO_STREAM_BLUETOOTH_SCO:
3910        return STRATEGY_PHONE;
3911    case AUDIO_STREAM_RING:
3912    case AUDIO_STREAM_ALARM:
3913        return STRATEGY_SONIFICATION;
3914    case AUDIO_STREAM_NOTIFICATION:
3915        return STRATEGY_SONIFICATION_RESPECTFUL;
3916    case AUDIO_STREAM_DTMF:
3917        return STRATEGY_DTMF;
3918    default:
3919        ALOGE("unknown stream type");
3920    case AUDIO_STREAM_SYSTEM:
3921        // NOTE: SYSTEM stream uses MEDIA strategy because muting music and switching outputs
3922        // while key clicks are played produces a poor result
3923    case AUDIO_STREAM_TTS:
3924    case AUDIO_STREAM_MUSIC:
3925        return STRATEGY_MEDIA;
3926    case AUDIO_STREAM_ENFORCED_AUDIBLE:
3927        return STRATEGY_ENFORCED_AUDIBLE;
3928    }
3929}
3930
3931uint32_t AudioPolicyManager::getStrategyForAttr(const audio_attributes_t *attr) {
3932    // flags to strategy mapping
3933    if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
3934        return (uint32_t) STRATEGY_ENFORCED_AUDIBLE;
3935    }
3936
3937    // usage to strategy mapping
3938    switch (attr->usage) {
3939    case AUDIO_USAGE_MEDIA:
3940    case AUDIO_USAGE_GAME:
3941    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
3942    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
3943    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
3944        return (uint32_t) STRATEGY_MEDIA;
3945
3946    case AUDIO_USAGE_VOICE_COMMUNICATION:
3947        return (uint32_t) STRATEGY_PHONE;
3948
3949    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
3950        return (uint32_t) STRATEGY_DTMF;
3951
3952    case AUDIO_USAGE_ALARM:
3953    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
3954        return (uint32_t) STRATEGY_SONIFICATION;
3955
3956    case AUDIO_USAGE_NOTIFICATION:
3957    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
3958    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
3959    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
3960    case AUDIO_USAGE_NOTIFICATION_EVENT:
3961        return (uint32_t) STRATEGY_SONIFICATION_RESPECTFUL;
3962
3963    case AUDIO_USAGE_UNKNOWN:
3964    default:
3965        return (uint32_t) STRATEGY_MEDIA;
3966    }
3967}
3968
3969void AudioPolicyManager::handleNotificationRoutingForStream(audio_stream_type_t stream) {
3970    switch(stream) {
3971    case AUDIO_STREAM_MUSIC:
3972        checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
3973        updateDevicesAndOutputs();
3974        break;
3975    default:
3976        break;
3977    }
3978}
3979
3980audio_devices_t AudioPolicyManager::getDeviceForStrategy(routing_strategy strategy,
3981                                                             bool fromCache)
3982{
3983    uint32_t device = AUDIO_DEVICE_NONE;
3984
3985    if (fromCache) {
3986        ALOGVV("getDeviceForStrategy() from cache strategy %d, device %x",
3987              strategy, mDeviceForStrategy[strategy]);
3988        return mDeviceForStrategy[strategy];
3989    }
3990    audio_devices_t availableOutputDeviceTypes = mAvailableOutputDevices.types();
3991    switch (strategy) {
3992
3993    case STRATEGY_SONIFICATION_RESPECTFUL:
3994        if (isInCall()) {
3995            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
3996        } else if (isStreamActiveRemotely(AUDIO_STREAM_MUSIC,
3997                SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
3998            // while media is playing on a remote device, use the the sonification behavior.
3999            // Note that we test this usecase before testing if media is playing because
4000            //   the isStreamActive() method only informs about the activity of a stream, not
4001            //   if it's for local playback. Note also that we use the same delay between both tests
4002            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
4003            //user "safe" speaker if available instead of normal speaker to avoid triggering
4004            //other acoustic safety mechanisms for notification
4005            if (device == AUDIO_DEVICE_OUT_SPEAKER && (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER_SAFE))
4006                device = AUDIO_DEVICE_OUT_SPEAKER_SAFE;
4007        } else if (isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
4008            // while media is playing (or has recently played), use the same device
4009            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
4010        } else {
4011            // when media is not playing anymore, fall back on the sonification behavior
4012            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
4013            //user "safe" speaker if available instead of normal speaker to avoid triggering
4014            //other acoustic safety mechanisms for notification
4015            if (device == AUDIO_DEVICE_OUT_SPEAKER && (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER_SAFE))
4016                device = AUDIO_DEVICE_OUT_SPEAKER_SAFE;
4017        }
4018
4019        break;
4020
4021    case STRATEGY_DTMF:
4022        if (!isInCall()) {
4023            // when off call, DTMF strategy follows the same rules as MEDIA strategy
4024            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
4025            break;
4026        }
4027        // when in call, DTMF and PHONE strategies follow the same rules
4028        // FALL THROUGH
4029
4030    case STRATEGY_PHONE:
4031        // Force use of only devices on primary output if:
4032        // - in call AND
4033        //   - cannot route from voice call RX OR
4034        //   - audio HAL version is < 3.0 and TX device is on the primary HW module
4035        if (mPhoneState == AUDIO_MODE_IN_CALL) {
4036            audio_devices_t txDevice = getDeviceForInputSource(AUDIO_SOURCE_VOICE_COMMUNICATION);
4037            sp<AudioOutputDescriptor> hwOutputDesc = mOutputs.valueFor(mPrimaryOutput);
4038            if (((mAvailableInputDevices.types() &
4039                    AUDIO_DEVICE_IN_TELEPHONY_RX & ~AUDIO_DEVICE_BIT_IN) == 0) ||
4040                    (((txDevice & availablePrimaryInputDevices() & ~AUDIO_DEVICE_BIT_IN) != 0) &&
4041                         (hwOutputDesc->getAudioPort()->mModule->mHalVersion <
4042                             AUDIO_DEVICE_API_VERSION_3_0))) {
4043                availableOutputDeviceTypes = availablePrimaryOutputDevices();
4044            }
4045        }
4046        // for phone strategy, we first consider the forced use and then the available devices by order
4047        // of priority
4048        switch (mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]) {
4049        case AUDIO_POLICY_FORCE_BT_SCO:
4050            if (!isInCall() || strategy != STRATEGY_DTMF) {
4051                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT;
4052                if (device) break;
4053            }
4054            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET;
4055            if (device) break;
4056            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO;
4057            if (device) break;
4058            // if SCO device is requested but no SCO device is available, fall back to default case
4059            // FALL THROUGH
4060
4061        default:    // FORCE_NONE
4062            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to A2DP
4063            if (!isInCall() &&
4064                    (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
4065                    (getA2dpOutput() != 0) && !mA2dpSuspended) {
4066                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP;
4067                if (device) break;
4068                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
4069                if (device) break;
4070            }
4071            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
4072            if (device) break;
4073            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADSET;
4074            if (device) break;
4075            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
4076            if (device) break;
4077            if (mPhoneState != AUDIO_MODE_IN_CALL) {
4078                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
4079                if (device) break;
4080                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
4081                if (device) break;
4082                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
4083                if (device) break;
4084                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
4085                if (device) break;
4086            }
4087            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_EARPIECE;
4088            if (device) break;
4089            device = mDefaultOutputDevice->mDeviceType;
4090            if (device == AUDIO_DEVICE_NONE) {
4091                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE");
4092            }
4093            break;
4094
4095        case AUDIO_POLICY_FORCE_SPEAKER:
4096            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to
4097            // A2DP speaker when forcing to speaker output
4098            if (!isInCall() &&
4099                    (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
4100                    (getA2dpOutput() != 0) && !mA2dpSuspended) {
4101                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
4102                if (device) break;
4103            }
4104            if (mPhoneState != AUDIO_MODE_IN_CALL) {
4105                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
4106                if (device) break;
4107                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
4108                if (device) break;
4109                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
4110                if (device) break;
4111                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
4112                if (device) break;
4113                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
4114                if (device) break;
4115            }
4116            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_LINE;
4117            if (device) break;
4118            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4119            if (device) break;
4120            device = mDefaultOutputDevice->mDeviceType;
4121            if (device == AUDIO_DEVICE_NONE) {
4122                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE, FORCE_SPEAKER");
4123            }
4124            break;
4125        }
4126    break;
4127
4128    case STRATEGY_SONIFICATION:
4129
4130        // If incall, just select the STRATEGY_PHONE device: The rest of the behavior is handled by
4131        // handleIncallSonification().
4132        if (isInCall()) {
4133            device = getDeviceForStrategy(STRATEGY_PHONE, false /*fromCache*/);
4134            break;
4135        }
4136        // FALL THROUGH
4137
4138    case STRATEGY_ENFORCED_AUDIBLE:
4139        // strategy STRATEGY_ENFORCED_AUDIBLE uses same routing policy as STRATEGY_SONIFICATION
4140        // except:
4141        //   - when in call where it doesn't default to STRATEGY_PHONE behavior
4142        //   - in countries where not enforced in which case it follows STRATEGY_MEDIA
4143
4144        if ((strategy == STRATEGY_SONIFICATION) ||
4145                (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_SYSTEM_ENFORCED)) {
4146            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4147            if (device == AUDIO_DEVICE_NONE) {
4148                ALOGE("getDeviceForStrategy() speaker device not found for STRATEGY_SONIFICATION");
4149            }
4150        }
4151        // The second device used for sonification is the same as the device used by media strategy
4152        // FALL THROUGH
4153
4154    case STRATEGY_MEDIA: {
4155        uint32_t device2 = AUDIO_DEVICE_NONE;
4156        if (strategy != STRATEGY_SONIFICATION) {
4157            // no sonification on remote submix (e.g. WFD)
4158            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_REMOTE_SUBMIX;
4159        }
4160        if ((device2 == AUDIO_DEVICE_NONE) &&
4161                (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
4162                (getA2dpOutput() != 0) && !mA2dpSuspended) {
4163            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP;
4164            if (device2 == AUDIO_DEVICE_NONE) {
4165                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
4166            }
4167            if (device2 == AUDIO_DEVICE_NONE) {
4168                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
4169            }
4170        }
4171        if (device2 == AUDIO_DEVICE_NONE) {
4172            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
4173        }
4174        if ((device2 == AUDIO_DEVICE_NONE)) {
4175            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_LINE;
4176        }
4177        if (device2 == AUDIO_DEVICE_NONE) {
4178            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADSET;
4179        }
4180        if (device2 == AUDIO_DEVICE_NONE) {
4181            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
4182        }
4183        if (device2 == AUDIO_DEVICE_NONE) {
4184            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
4185        }
4186        if (device2 == AUDIO_DEVICE_NONE) {
4187            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
4188        }
4189        if ((device2 == AUDIO_DEVICE_NONE) && (strategy != STRATEGY_SONIFICATION)) {
4190            // no sonification on aux digital (e.g. HDMI)
4191            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
4192        }
4193        if ((device2 == AUDIO_DEVICE_NONE) &&
4194                (mForceUse[AUDIO_POLICY_FORCE_FOR_DOCK] == AUDIO_POLICY_FORCE_ANALOG_DOCK)) {
4195            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
4196        }
4197        if (device2 == AUDIO_DEVICE_NONE) {
4198            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4199        }
4200        int device3 = AUDIO_DEVICE_NONE;
4201        if (strategy == STRATEGY_MEDIA) {
4202            // ARC, SPDIF and AUX_LINE can co-exist with others.
4203            device3 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_HDMI_ARC;
4204            device3 |= (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPDIF);
4205            device3 |= (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_LINE);
4206        }
4207
4208        device2 |= device3;
4209        // device is DEVICE_OUT_SPEAKER if we come from case STRATEGY_SONIFICATION or
4210        // STRATEGY_ENFORCED_AUDIBLE, AUDIO_DEVICE_NONE otherwise
4211        device |= device2;
4212
4213        // If hdmi system audio mode is on, remove speaker out of output list.
4214        if ((strategy == STRATEGY_MEDIA) &&
4215            (mForceUse[AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO] ==
4216                AUDIO_POLICY_FORCE_HDMI_SYSTEM_AUDIO_ENFORCED)) {
4217            device &= ~AUDIO_DEVICE_OUT_SPEAKER;
4218        }
4219
4220        if (device) break;
4221        device = mDefaultOutputDevice->mDeviceType;
4222        if (device == AUDIO_DEVICE_NONE) {
4223            ALOGE("getDeviceForStrategy() no device found for STRATEGY_MEDIA");
4224        }
4225        } break;
4226
4227    default:
4228        ALOGW("getDeviceForStrategy() unknown strategy: %d", strategy);
4229        break;
4230    }
4231
4232    ALOGVV("getDeviceForStrategy() strategy %d, device %x", strategy, device);
4233    return device;
4234}
4235
4236void AudioPolicyManager::updateDevicesAndOutputs()
4237{
4238    for (int i = 0; i < NUM_STRATEGIES; i++) {
4239        mDeviceForStrategy[i] = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
4240    }
4241    mPreviousOutputs = mOutputs;
4242}
4243
4244uint32_t AudioPolicyManager::checkDeviceMuteStrategies(sp<AudioOutputDescriptor> outputDesc,
4245                                                       audio_devices_t prevDevice,
4246                                                       uint32_t delayMs)
4247{
4248    // mute/unmute strategies using an incompatible device combination
4249    // if muting, wait for the audio in pcm buffer to be drained before proceeding
4250    // if unmuting, unmute only after the specified delay
4251    if (outputDesc->isDuplicated()) {
4252        return 0;
4253    }
4254
4255    uint32_t muteWaitMs = 0;
4256    audio_devices_t device = outputDesc->device();
4257    bool shouldMute = outputDesc->isActive() && (popcount(device) >= 2);
4258
4259    for (size_t i = 0; i < NUM_STRATEGIES; i++) {
4260        audio_devices_t curDevice = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
4261        bool mute = shouldMute && (curDevice & device) && (curDevice != device);
4262        bool doMute = false;
4263
4264        if (mute && !outputDesc->mStrategyMutedByDevice[i]) {
4265            doMute = true;
4266            outputDesc->mStrategyMutedByDevice[i] = true;
4267        } else if (!mute && outputDesc->mStrategyMutedByDevice[i]){
4268            doMute = true;
4269            outputDesc->mStrategyMutedByDevice[i] = false;
4270        }
4271        if (doMute) {
4272            for (size_t j = 0; j < mOutputs.size(); j++) {
4273                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(j);
4274                // skip output if it does not share any device with current output
4275                if ((desc->supportedDevices() & outputDesc->supportedDevices())
4276                        == AUDIO_DEVICE_NONE) {
4277                    continue;
4278                }
4279                audio_io_handle_t curOutput = mOutputs.keyAt(j);
4280                ALOGVV("checkDeviceMuteStrategies() %s strategy %d (curDevice %04x) on output %d",
4281                      mute ? "muting" : "unmuting", i, curDevice, curOutput);
4282                setStrategyMute((routing_strategy)i, mute, curOutput, mute ? 0 : delayMs);
4283                if (desc->isStrategyActive((routing_strategy)i)) {
4284                    if (mute) {
4285                        // FIXME: should not need to double latency if volume could be applied
4286                        // immediately by the audioflinger mixer. We must account for the delay
4287                        // between now and the next time the audioflinger thread for this output
4288                        // will process a buffer (which corresponds to one buffer size,
4289                        // usually 1/2 or 1/4 of the latency).
4290                        if (muteWaitMs < desc->latency() * 2) {
4291                            muteWaitMs = desc->latency() * 2;
4292                        }
4293                    }
4294                }
4295            }
4296        }
4297    }
4298
4299    // temporary mute output if device selection changes to avoid volume bursts due to
4300    // different per device volumes
4301    if (outputDesc->isActive() && (device != prevDevice)) {
4302        if (muteWaitMs < outputDesc->latency() * 2) {
4303            muteWaitMs = outputDesc->latency() * 2;
4304        }
4305        for (size_t i = 0; i < NUM_STRATEGIES; i++) {
4306            if (outputDesc->isStrategyActive((routing_strategy)i)) {
4307                setStrategyMute((routing_strategy)i, true, outputDesc->mIoHandle);
4308                // do tempMute unmute after twice the mute wait time
4309                setStrategyMute((routing_strategy)i, false, outputDesc->mIoHandle,
4310                                muteWaitMs *2, device);
4311            }
4312        }
4313    }
4314
4315    // wait for the PCM output buffers to empty before proceeding with the rest of the command
4316    if (muteWaitMs > delayMs) {
4317        muteWaitMs -= delayMs;
4318        usleep(muteWaitMs * 1000);
4319        return muteWaitMs;
4320    }
4321    return 0;
4322}
4323
4324uint32_t AudioPolicyManager::setOutputDevice(audio_io_handle_t output,
4325                                             audio_devices_t device,
4326                                             bool force,
4327                                             int delayMs,
4328                                             audio_patch_handle_t *patchHandle,
4329                                             const char* address)
4330{
4331    ALOGV("setOutputDevice() output %d device %04x delayMs %d", output, device, delayMs);
4332    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4333    AudioParameter param;
4334    uint32_t muteWaitMs;
4335
4336    if (outputDesc->isDuplicated()) {
4337        muteWaitMs = setOutputDevice(outputDesc->mOutput1->mIoHandle, device, force, delayMs);
4338        muteWaitMs += setOutputDevice(outputDesc->mOutput2->mIoHandle, device, force, delayMs);
4339        return muteWaitMs;
4340    }
4341    // no need to proceed if new device is not AUDIO_DEVICE_NONE and not supported by current
4342    // output profile
4343    if ((device != AUDIO_DEVICE_NONE) &&
4344            ((device & outputDesc->mProfile->mSupportedDevices.types()) == 0)) {
4345        return 0;
4346    }
4347
4348    // filter devices according to output selected
4349    device = (audio_devices_t)(device & outputDesc->mProfile->mSupportedDevices.types());
4350
4351    audio_devices_t prevDevice = outputDesc->mDevice;
4352
4353    ALOGV("setOutputDevice() prevDevice %04x", prevDevice);
4354
4355    if (device != AUDIO_DEVICE_NONE) {
4356        outputDesc->mDevice = device;
4357    }
4358    muteWaitMs = checkDeviceMuteStrategies(outputDesc, prevDevice, delayMs);
4359
4360    // Do not change the routing if:
4361    //  - the requested device is AUDIO_DEVICE_NONE
4362    //  - the requested device is the same as current device and force is not specified.
4363    // Doing this check here allows the caller to call setOutputDevice() without conditions
4364    if ((device == AUDIO_DEVICE_NONE || device == prevDevice) && !force) {
4365        ALOGV("setOutputDevice() setting same device %04x or null device for output %d", device, output);
4366        return muteWaitMs;
4367    }
4368
4369    ALOGV("setOutputDevice() changing device");
4370
4371    // do the routing
4372    if (device == AUDIO_DEVICE_NONE) {
4373        resetOutputDevice(output, delayMs, NULL);
4374    } else {
4375        DeviceVector deviceList = (address == NULL) ?
4376                mAvailableOutputDevices.getDevicesFromType(device)
4377                : mAvailableOutputDevices.getDevicesFromTypeAddr(device, String8(address));
4378        if (!deviceList.isEmpty()) {
4379            struct audio_patch patch;
4380            outputDesc->toAudioPortConfig(&patch.sources[0]);
4381            patch.num_sources = 1;
4382            patch.num_sinks = 0;
4383            for (size_t i = 0; i < deviceList.size() && i < AUDIO_PATCH_PORTS_MAX; i++) {
4384                deviceList.itemAt(i)->toAudioPortConfig(&patch.sinks[i]);
4385                patch.num_sinks++;
4386            }
4387            ssize_t index;
4388            if (patchHandle && *patchHandle != AUDIO_PATCH_HANDLE_NONE) {
4389                index = mAudioPatches.indexOfKey(*patchHandle);
4390            } else {
4391                index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
4392            }
4393            sp< AudioPatch> patchDesc;
4394            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
4395            if (index >= 0) {
4396                patchDesc = mAudioPatches.valueAt(index);
4397                afPatchHandle = patchDesc->mAfPatchHandle;
4398            }
4399
4400            status_t status = mpClientInterface->createAudioPatch(&patch,
4401                                                                   &afPatchHandle,
4402                                                                   delayMs);
4403            ALOGV("setOutputDevice() createAudioPatch returned %d patchHandle %d"
4404                    "num_sources %d num_sinks %d",
4405                                       status, afPatchHandle, patch.num_sources, patch.num_sinks);
4406            if (status == NO_ERROR) {
4407                if (index < 0) {
4408                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
4409                                               &patch, mUidCached);
4410                    addAudioPatch(patchDesc->mHandle, patchDesc);
4411                } else {
4412                    patchDesc->mPatch = patch;
4413                }
4414                patchDesc->mAfPatchHandle = afPatchHandle;
4415                patchDesc->mUid = mUidCached;
4416                if (patchHandle) {
4417                    *patchHandle = patchDesc->mHandle;
4418                }
4419                outputDesc->mPatchHandle = patchDesc->mHandle;
4420                nextAudioPortGeneration();
4421                mpClientInterface->onAudioPatchListUpdate();
4422            }
4423        }
4424
4425        // inform all input as well
4426        for (size_t i = 0; i < mInputs.size(); i++) {
4427            const sp<AudioInputDescriptor>  inputDescriptor = mInputs.valueAt(i);
4428            if (!isVirtualInputDevice(inputDescriptor->mDevice)) {
4429                AudioParameter inputCmd = AudioParameter();
4430                ALOGV("%s: inform input %d of device:%d", __func__,
4431                      inputDescriptor->mIoHandle, device);
4432                inputCmd.addInt(String8(AudioParameter::keyRouting),device);
4433                mpClientInterface->setParameters(inputDescriptor->mIoHandle,
4434                                                 inputCmd.toString(),
4435                                                 delayMs);
4436            }
4437        }
4438    }
4439
4440    // update stream volumes according to new device
4441    applyStreamVolumes(output, device, delayMs);
4442
4443    return muteWaitMs;
4444}
4445
4446status_t AudioPolicyManager::resetOutputDevice(audio_io_handle_t output,
4447                                               int delayMs,
4448                                               audio_patch_handle_t *patchHandle)
4449{
4450    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4451    ssize_t index;
4452    if (patchHandle) {
4453        index = mAudioPatches.indexOfKey(*patchHandle);
4454    } else {
4455        index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
4456    }
4457    if (index < 0) {
4458        return INVALID_OPERATION;
4459    }
4460    sp< AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4461    status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, delayMs);
4462    ALOGV("resetOutputDevice() releaseAudioPatch returned %d", status);
4463    outputDesc->mPatchHandle = 0;
4464    removeAudioPatch(patchDesc->mHandle);
4465    nextAudioPortGeneration();
4466    mpClientInterface->onAudioPatchListUpdate();
4467    return status;
4468}
4469
4470status_t AudioPolicyManager::setInputDevice(audio_io_handle_t input,
4471                                            audio_devices_t device,
4472                                            bool force,
4473                                            audio_patch_handle_t *patchHandle)
4474{
4475    status_t status = NO_ERROR;
4476
4477    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
4478    if ((device != AUDIO_DEVICE_NONE) && ((device != inputDesc->mDevice) || force)) {
4479        inputDesc->mDevice = device;
4480
4481        DeviceVector deviceList = mAvailableInputDevices.getDevicesFromType(device);
4482        if (!deviceList.isEmpty()) {
4483            struct audio_patch patch;
4484            inputDesc->toAudioPortConfig(&patch.sinks[0]);
4485            // AUDIO_SOURCE_HOTWORD is for internal use only:
4486            // handled as AUDIO_SOURCE_VOICE_RECOGNITION by the audio HAL
4487            if (patch.sinks[0].ext.mix.usecase.source == AUDIO_SOURCE_HOTWORD &&
4488                    !inputDesc->mIsSoundTrigger) {
4489                patch.sinks[0].ext.mix.usecase.source = AUDIO_SOURCE_VOICE_RECOGNITION;
4490            }
4491            patch.num_sinks = 1;
4492            //only one input device for now
4493            deviceList.itemAt(0)->toAudioPortConfig(&patch.sources[0]);
4494            patch.num_sources = 1;
4495            ssize_t index;
4496            if (patchHandle && *patchHandle != AUDIO_PATCH_HANDLE_NONE) {
4497                index = mAudioPatches.indexOfKey(*patchHandle);
4498            } else {
4499                index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
4500            }
4501            sp< AudioPatch> patchDesc;
4502            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
4503            if (index >= 0) {
4504                patchDesc = mAudioPatches.valueAt(index);
4505                afPatchHandle = patchDesc->mAfPatchHandle;
4506            }
4507
4508            status_t status = mpClientInterface->createAudioPatch(&patch,
4509                                                                  &afPatchHandle,
4510                                                                  0);
4511            ALOGV("setInputDevice() createAudioPatch returned %d patchHandle %d",
4512                                                                          status, afPatchHandle);
4513            if (status == NO_ERROR) {
4514                if (index < 0) {
4515                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
4516                                               &patch, mUidCached);
4517                    addAudioPatch(patchDesc->mHandle, patchDesc);
4518                } else {
4519                    patchDesc->mPatch = patch;
4520                }
4521                patchDesc->mAfPatchHandle = afPatchHandle;
4522                patchDesc->mUid = mUidCached;
4523                if (patchHandle) {
4524                    *patchHandle = patchDesc->mHandle;
4525                }
4526                inputDesc->mPatchHandle = patchDesc->mHandle;
4527                nextAudioPortGeneration();
4528                mpClientInterface->onAudioPatchListUpdate();
4529            }
4530        }
4531    }
4532    return status;
4533}
4534
4535status_t AudioPolicyManager::resetInputDevice(audio_io_handle_t input,
4536                                              audio_patch_handle_t *patchHandle)
4537{
4538    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
4539    ssize_t index;
4540    if (patchHandle) {
4541        index = mAudioPatches.indexOfKey(*patchHandle);
4542    } else {
4543        index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
4544    }
4545    if (index < 0) {
4546        return INVALID_OPERATION;
4547    }
4548    sp< AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4549    status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
4550    ALOGV("resetInputDevice() releaseAudioPatch returned %d", status);
4551    inputDesc->mPatchHandle = 0;
4552    removeAudioPatch(patchDesc->mHandle);
4553    nextAudioPortGeneration();
4554    mpClientInterface->onAudioPatchListUpdate();
4555    return status;
4556}
4557
4558sp<AudioPolicyManager::IOProfile> AudioPolicyManager::getInputProfile(audio_devices_t device,
4559                                                   uint32_t& samplingRate,
4560                                                   audio_format_t format,
4561                                                   audio_channel_mask_t channelMask,
4562                                                   audio_input_flags_t flags)
4563{
4564    // Choose an input profile based on the requested capture parameters: select the first available
4565    // profile supporting all requested parameters.
4566
4567    for (size_t i = 0; i < mHwModules.size(); i++)
4568    {
4569        if (mHwModules[i]->mHandle == 0) {
4570            continue;
4571        }
4572        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
4573        {
4574            sp<IOProfile> profile = mHwModules[i]->mInputProfiles[j];
4575            // profile->log();
4576            if (profile->isCompatibleProfile(device, samplingRate,
4577                                             &samplingRate /*updatedSamplingRate*/,
4578                                             format, channelMask, (audio_output_flags_t) flags)) {
4579                return profile;
4580            }
4581        }
4582    }
4583    return NULL;
4584}
4585
4586audio_devices_t AudioPolicyManager::getDeviceForInputSource(audio_source_t inputSource)
4587{
4588    uint32_t device = AUDIO_DEVICE_NONE;
4589    audio_devices_t availableDeviceTypes = mAvailableInputDevices.types() &
4590                                            ~AUDIO_DEVICE_BIT_IN;
4591    switch (inputSource) {
4592    case AUDIO_SOURCE_VOICE_UPLINK:
4593      if (availableDeviceTypes & AUDIO_DEVICE_IN_VOICE_CALL) {
4594          device = AUDIO_DEVICE_IN_VOICE_CALL;
4595          break;
4596      }
4597      break;
4598
4599    case AUDIO_SOURCE_DEFAULT:
4600    case AUDIO_SOURCE_MIC:
4601    if (availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_A2DP) {
4602        device = AUDIO_DEVICE_IN_BLUETOOTH_A2DP;
4603    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
4604        device = AUDIO_DEVICE_IN_WIRED_HEADSET;
4605    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
4606        device = AUDIO_DEVICE_IN_USB_DEVICE;
4607    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4608        device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4609    }
4610    break;
4611
4612    case AUDIO_SOURCE_VOICE_COMMUNICATION:
4613        // Allow only use of devices on primary input if in call and HAL does not support routing
4614        // to voice call path.
4615        if ((mPhoneState == AUDIO_MODE_IN_CALL) &&
4616                (mAvailableOutputDevices.types() & AUDIO_DEVICE_OUT_TELEPHONY_TX) == 0) {
4617            availableDeviceTypes = availablePrimaryInputDevices() & ~AUDIO_DEVICE_BIT_IN;
4618        }
4619
4620        switch (mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]) {
4621        case AUDIO_POLICY_FORCE_BT_SCO:
4622            // if SCO device is requested but no SCO device is available, fall back to default case
4623            if (availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) {
4624                device = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET;
4625                break;
4626            }
4627            // FALL THROUGH
4628
4629        default:    // FORCE_NONE
4630            if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
4631                device = AUDIO_DEVICE_IN_WIRED_HEADSET;
4632            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
4633                device = AUDIO_DEVICE_IN_USB_DEVICE;
4634            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4635                device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4636            }
4637            break;
4638
4639        case AUDIO_POLICY_FORCE_SPEAKER:
4640            if (availableDeviceTypes & AUDIO_DEVICE_IN_BACK_MIC) {
4641                device = AUDIO_DEVICE_IN_BACK_MIC;
4642            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4643                device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4644            }
4645            break;
4646        }
4647        break;
4648
4649    case AUDIO_SOURCE_VOICE_RECOGNITION:
4650    case AUDIO_SOURCE_HOTWORD:
4651        if (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] == AUDIO_POLICY_FORCE_BT_SCO &&
4652                availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) {
4653            device = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET;
4654        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
4655            device = AUDIO_DEVICE_IN_WIRED_HEADSET;
4656        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
4657            device = AUDIO_DEVICE_IN_USB_DEVICE;
4658        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4659            device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4660        }
4661        break;
4662    case AUDIO_SOURCE_CAMCORDER:
4663        if (availableDeviceTypes & AUDIO_DEVICE_IN_BACK_MIC) {
4664            device = AUDIO_DEVICE_IN_BACK_MIC;
4665        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4666            device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4667        }
4668        break;
4669    case AUDIO_SOURCE_VOICE_DOWNLINK:
4670    case AUDIO_SOURCE_VOICE_CALL:
4671        if (availableDeviceTypes & AUDIO_DEVICE_IN_VOICE_CALL) {
4672            device = AUDIO_DEVICE_IN_VOICE_CALL;
4673        }
4674        break;
4675    case AUDIO_SOURCE_REMOTE_SUBMIX:
4676        if (availableDeviceTypes & AUDIO_DEVICE_IN_REMOTE_SUBMIX) {
4677            device = AUDIO_DEVICE_IN_REMOTE_SUBMIX;
4678        }
4679        break;
4680    default:
4681        ALOGW("getDeviceForInputSource() invalid input source %d", inputSource);
4682        break;
4683    }
4684    ALOGV("getDeviceForInputSource()input source %d, device %08x", inputSource, device);
4685    return device;
4686}
4687
4688bool AudioPolicyManager::isVirtualInputDevice(audio_devices_t device)
4689{
4690    if ((device & AUDIO_DEVICE_BIT_IN) != 0) {
4691        device &= ~AUDIO_DEVICE_BIT_IN;
4692        if ((popcount(device) == 1) && ((device & ~APM_AUDIO_IN_DEVICE_VIRTUAL_ALL) == 0))
4693            return true;
4694    }
4695    return false;
4696}
4697
4698bool AudioPolicyManager::deviceDistinguishesOnAddress(audio_devices_t device) {
4699    return ((device & APM_AUDIO_DEVICE_MATCH_ADDRESS_ALL) != 0);
4700}
4701
4702audio_io_handle_t AudioPolicyManager::getActiveInput(bool ignoreVirtualInputs)
4703{
4704    for (size_t i = 0; i < mInputs.size(); i++) {
4705        const sp<AudioInputDescriptor>  input_descriptor = mInputs.valueAt(i);
4706        if ((input_descriptor->mRefCount > 0)
4707                && (!ignoreVirtualInputs || !isVirtualInputDevice(input_descriptor->mDevice))) {
4708            return mInputs.keyAt(i);
4709        }
4710    }
4711    return 0;
4712}
4713
4714uint32_t AudioPolicyManager::activeInputsCount() const
4715{
4716    uint32_t count = 0;
4717    for (size_t i = 0; i < mInputs.size(); i++) {
4718        const sp<AudioInputDescriptor>  desc = mInputs.valueAt(i);
4719        if (desc->mRefCount > 0) {
4720            return count++;
4721        }
4722    }
4723    return count;
4724}
4725
4726
4727audio_devices_t AudioPolicyManager::getDeviceForVolume(audio_devices_t device)
4728{
4729    if (device == AUDIO_DEVICE_NONE) {
4730        // this happens when forcing a route update and no track is active on an output.
4731        // In this case the returned category is not important.
4732        device =  AUDIO_DEVICE_OUT_SPEAKER;
4733    } else if (popcount(device) > 1) {
4734        // Multiple device selection is either:
4735        //  - speaker + one other device: give priority to speaker in this case.
4736        //  - one A2DP device + another device: happens with duplicated output. In this case
4737        // retain the device on the A2DP output as the other must not correspond to an active
4738        // selection if not the speaker.
4739        //  - HDMI-CEC system audio mode only output: give priority to available item in order.
4740        if (device & AUDIO_DEVICE_OUT_SPEAKER) {
4741            device = AUDIO_DEVICE_OUT_SPEAKER;
4742        } else if (device & AUDIO_DEVICE_OUT_HDMI_ARC) {
4743            device = AUDIO_DEVICE_OUT_HDMI_ARC;
4744        } else if (device & AUDIO_DEVICE_OUT_AUX_LINE) {
4745            device = AUDIO_DEVICE_OUT_AUX_LINE;
4746        } else if (device & AUDIO_DEVICE_OUT_SPDIF) {
4747            device = AUDIO_DEVICE_OUT_SPDIF;
4748        } else {
4749            device = (audio_devices_t)(device & AUDIO_DEVICE_OUT_ALL_A2DP);
4750        }
4751    }
4752
4753    /*SPEAKER_SAFE is an alias of SPEAKER for purposes of volume control*/
4754    if (device == AUDIO_DEVICE_OUT_SPEAKER_SAFE)
4755        device = AUDIO_DEVICE_OUT_SPEAKER;
4756
4757    ALOGW_IF(popcount(device) != 1,
4758            "getDeviceForVolume() invalid device combination: %08x",
4759            device);
4760
4761    return device;
4762}
4763
4764AudioPolicyManager::device_category AudioPolicyManager::getDeviceCategory(audio_devices_t device)
4765{
4766    switch(getDeviceForVolume(device)) {
4767        case AUDIO_DEVICE_OUT_EARPIECE:
4768            return DEVICE_CATEGORY_EARPIECE;
4769        case AUDIO_DEVICE_OUT_WIRED_HEADSET:
4770        case AUDIO_DEVICE_OUT_WIRED_HEADPHONE:
4771        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO:
4772        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET:
4773        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP:
4774        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES:
4775            return DEVICE_CATEGORY_HEADSET;
4776        case AUDIO_DEVICE_OUT_LINE:
4777        case AUDIO_DEVICE_OUT_AUX_DIGITAL:
4778        /*USB?  Remote submix?*/
4779            return DEVICE_CATEGORY_EXT_MEDIA;
4780        case AUDIO_DEVICE_OUT_SPEAKER:
4781        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT:
4782        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER:
4783        case AUDIO_DEVICE_OUT_USB_ACCESSORY:
4784        case AUDIO_DEVICE_OUT_USB_DEVICE:
4785        case AUDIO_DEVICE_OUT_REMOTE_SUBMIX:
4786        default:
4787            return DEVICE_CATEGORY_SPEAKER;
4788    }
4789}
4790
4791float AudioPolicyManager::volIndexToAmpl(audio_devices_t device, const StreamDescriptor& streamDesc,
4792        int indexInUi)
4793{
4794    device_category deviceCategory = getDeviceCategory(device);
4795    const VolumeCurvePoint *curve = streamDesc.mVolumeCurve[deviceCategory];
4796
4797    // the volume index in the UI is relative to the min and max volume indices for this stream type
4798    int nbSteps = 1 + curve[VOLMAX].mIndex -
4799            curve[VOLMIN].mIndex;
4800    int volIdx = (nbSteps * (indexInUi - streamDesc.mIndexMin)) /
4801            (streamDesc.mIndexMax - streamDesc.mIndexMin);
4802
4803    // find what part of the curve this index volume belongs to, or if it's out of bounds
4804    int segment = 0;
4805    if (volIdx < curve[VOLMIN].mIndex) {         // out of bounds
4806        return 0.0f;
4807    } else if (volIdx < curve[VOLKNEE1].mIndex) {
4808        segment = 0;
4809    } else if (volIdx < curve[VOLKNEE2].mIndex) {
4810        segment = 1;
4811    } else if (volIdx <= curve[VOLMAX].mIndex) {
4812        segment = 2;
4813    } else {                                                               // out of bounds
4814        return 1.0f;
4815    }
4816
4817    // linear interpolation in the attenuation table in dB
4818    float decibels = curve[segment].mDBAttenuation +
4819            ((float)(volIdx - curve[segment].mIndex)) *
4820                ( (curve[segment+1].mDBAttenuation -
4821                        curve[segment].mDBAttenuation) /
4822                    ((float)(curve[segment+1].mIndex -
4823                            curve[segment].mIndex)) );
4824
4825    float amplification = exp( decibels * 0.115129f); // exp( dB * ln(10) / 20 )
4826
4827    ALOGVV("VOLUME vol index=[%d %d %d], dB=[%.1f %.1f %.1f] ampl=%.5f",
4828            curve[segment].mIndex, volIdx,
4829            curve[segment+1].mIndex,
4830            curve[segment].mDBAttenuation,
4831            decibels,
4832            curve[segment+1].mDBAttenuation,
4833            amplification);
4834
4835    return amplification;
4836}
4837
4838const AudioPolicyManager::VolumeCurvePoint
4839    AudioPolicyManager::sDefaultVolumeCurve[AudioPolicyManager::VOLCNT] = {
4840    {1, -49.5f}, {33, -33.5f}, {66, -17.0f}, {100, 0.0f}
4841};
4842
4843const AudioPolicyManager::VolumeCurvePoint
4844    AudioPolicyManager::sDefaultMediaVolumeCurve[AudioPolicyManager::VOLCNT] = {
4845    {1, -58.0f}, {20, -40.0f}, {60, -17.0f}, {100, 0.0f}
4846};
4847
4848const AudioPolicyManager::VolumeCurvePoint
4849    AudioPolicyManager::sExtMediaSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
4850    {1, -58.0f}, {20, -40.0f}, {60, -21.0f}, {100, -10.0f}
4851};
4852
4853const AudioPolicyManager::VolumeCurvePoint
4854    AudioPolicyManager::sSpeakerMediaVolumeCurve[AudioPolicyManager::VOLCNT] = {
4855    {1, -56.0f}, {20, -34.0f}, {60, -11.0f}, {100, 0.0f}
4856};
4857
4858const AudioPolicyManager::VolumeCurvePoint
4859    AudioPolicyManager::sSpeakerMediaVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
4860    {1, -55.0f}, {20, -43.0f}, {86, -12.0f}, {100, 0.0f}
4861};
4862
4863const AudioPolicyManager::VolumeCurvePoint
4864    AudioPolicyManager::sSpeakerSonificationVolumeCurve[AudioPolicyManager::VOLCNT] = {
4865    {1, -29.7f}, {33, -20.1f}, {66, -10.2f}, {100, 0.0f}
4866};
4867
4868const AudioPolicyManager::VolumeCurvePoint
4869    AudioPolicyManager::sSpeakerSonificationVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
4870    {1, -35.7f}, {33, -26.1f}, {66, -13.2f}, {100, 0.0f}
4871};
4872
4873// AUDIO_STREAM_SYSTEM, AUDIO_STREAM_ENFORCED_AUDIBLE and AUDIO_STREAM_DTMF volume tracks
4874// AUDIO_STREAM_RING on phones and AUDIO_STREAM_MUSIC on tablets.
4875// AUDIO_STREAM_DTMF tracks AUDIO_STREAM_VOICE_CALL while in call (See AudioService.java).
4876// The range is constrained between -24dB and -6dB over speaker and -30dB and -18dB over headset.
4877
4878const AudioPolicyManager::VolumeCurvePoint
4879    AudioPolicyManager::sDefaultSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
4880    {1, -24.0f}, {33, -18.0f}, {66, -12.0f}, {100, -6.0f}
4881};
4882
4883const AudioPolicyManager::VolumeCurvePoint
4884    AudioPolicyManager::sDefaultSystemVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
4885    {1, -34.0f}, {33, -24.0f}, {66, -15.0f}, {100, -6.0f}
4886};
4887
4888const AudioPolicyManager::VolumeCurvePoint
4889    AudioPolicyManager::sHeadsetSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
4890    {1, -30.0f}, {33, -26.0f}, {66, -22.0f}, {100, -18.0f}
4891};
4892
4893const AudioPolicyManager::VolumeCurvePoint
4894    AudioPolicyManager::sDefaultVoiceVolumeCurve[AudioPolicyManager::VOLCNT] = {
4895    {0, -42.0f}, {33, -28.0f}, {66, -14.0f}, {100, 0.0f}
4896};
4897
4898const AudioPolicyManager::VolumeCurvePoint
4899    AudioPolicyManager::sSpeakerVoiceVolumeCurve[AudioPolicyManager::VOLCNT] = {
4900    {0, -24.0f}, {33, -16.0f}, {66, -8.0f}, {100, 0.0f}
4901};
4902
4903const AudioPolicyManager::VolumeCurvePoint
4904            *AudioPolicyManager::sVolumeProfiles[AUDIO_STREAM_CNT]
4905                                                   [AudioPolicyManager::DEVICE_CATEGORY_CNT] = {
4906    { // AUDIO_STREAM_VOICE_CALL
4907        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_HEADSET
4908        sSpeakerVoiceVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4909        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_EARPIECE
4910        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4911    },
4912    { // AUDIO_STREAM_SYSTEM
4913        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
4914        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4915        sDefaultSystemVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
4916        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4917    },
4918    { // AUDIO_STREAM_RING
4919        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
4920        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4921        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
4922        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4923    },
4924    { // AUDIO_STREAM_MUSIC
4925        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
4926        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4927        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_EARPIECE
4928        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4929    },
4930    { // AUDIO_STREAM_ALARM
4931        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
4932        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4933        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
4934        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4935    },
4936    { // AUDIO_STREAM_NOTIFICATION
4937        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
4938        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4939        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
4940        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4941    },
4942    { // AUDIO_STREAM_BLUETOOTH_SCO
4943        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_HEADSET
4944        sSpeakerVoiceVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4945        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_EARPIECE
4946        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4947    },
4948    { // AUDIO_STREAM_ENFORCED_AUDIBLE
4949        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
4950        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4951        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_EARPIECE
4952        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4953    },
4954    {  // AUDIO_STREAM_DTMF
4955        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
4956        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4957        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_EARPIECE
4958        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4959    },
4960    { // AUDIO_STREAM_TTS
4961        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
4962        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4963        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_EARPIECE
4964        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4965    },
4966};
4967
4968void AudioPolicyManager::initializeVolumeCurves()
4969{
4970    for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
4971        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
4972            mStreams[i].mVolumeCurve[j] =
4973                    sVolumeProfiles[i][j];
4974        }
4975    }
4976
4977    // Check availability of DRC on speaker path: if available, override some of the speaker curves
4978    if (mSpeakerDrcEnabled) {
4979        mStreams[AUDIO_STREAM_SYSTEM].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4980                sDefaultSystemVolumeCurveDrc;
4981        mStreams[AUDIO_STREAM_RING].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4982                sSpeakerSonificationVolumeCurveDrc;
4983        mStreams[AUDIO_STREAM_ALARM].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4984                sSpeakerSonificationVolumeCurveDrc;
4985        mStreams[AUDIO_STREAM_NOTIFICATION].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4986                sSpeakerSonificationVolumeCurveDrc;
4987        mStreams[AUDIO_STREAM_MUSIC].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4988                sSpeakerMediaVolumeCurveDrc;
4989    }
4990}
4991
4992float AudioPolicyManager::computeVolume(audio_stream_type_t stream,
4993                                            int index,
4994                                            audio_io_handle_t output,
4995                                            audio_devices_t device)
4996{
4997    float volume = 1.0;
4998    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4999    StreamDescriptor &streamDesc = mStreams[stream];
5000
5001    if (device == AUDIO_DEVICE_NONE) {
5002        device = outputDesc->device();
5003    }
5004
5005    volume = volIndexToAmpl(device, streamDesc, index);
5006
5007    // if a headset is connected, apply the following rules to ring tones and notifications
5008    // to avoid sound level bursts in user's ears:
5009    // - always attenuate ring tones and notifications volume by 6dB
5010    // - if music is playing, always limit the volume to current music volume,
5011    // with a minimum threshold at -36dB so that notification is always perceived.
5012    const routing_strategy stream_strategy = getStrategy(stream);
5013    if ((device & (AUDIO_DEVICE_OUT_BLUETOOTH_A2DP |
5014            AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES |
5015            AUDIO_DEVICE_OUT_WIRED_HEADSET |
5016            AUDIO_DEVICE_OUT_WIRED_HEADPHONE)) &&
5017        ((stream_strategy == STRATEGY_SONIFICATION)
5018                || (stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL)
5019                || (stream == AUDIO_STREAM_SYSTEM)
5020                || ((stream_strategy == STRATEGY_ENFORCED_AUDIBLE) &&
5021                    (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_NONE))) &&
5022        streamDesc.mCanBeMuted) {
5023        volume *= SONIFICATION_HEADSET_VOLUME_FACTOR;
5024        // when the phone is ringing we must consider that music could have been paused just before
5025        // by the music application and behave as if music was active if the last music track was
5026        // just stopped
5027        if (isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY) ||
5028                mLimitRingtoneVolume) {
5029            audio_devices_t musicDevice = getDeviceForStrategy(STRATEGY_MEDIA, true /*fromCache*/);
5030            float musicVol = computeVolume(AUDIO_STREAM_MUSIC,
5031                               mStreams[AUDIO_STREAM_MUSIC].getVolumeIndex(musicDevice),
5032                               output,
5033                               musicDevice);
5034            float minVol = (musicVol > SONIFICATION_HEADSET_VOLUME_MIN) ?
5035                                musicVol : SONIFICATION_HEADSET_VOLUME_MIN;
5036            if (volume > minVol) {
5037                volume = minVol;
5038                ALOGV("computeVolume limiting volume to %f musicVol %f", minVol, musicVol);
5039            }
5040        }
5041    }
5042
5043    return volume;
5044}
5045
5046status_t AudioPolicyManager::checkAndSetVolume(audio_stream_type_t stream,
5047                                                   int index,
5048                                                   audio_io_handle_t output,
5049                                                   audio_devices_t device,
5050                                                   int delayMs,
5051                                                   bool force)
5052{
5053
5054    // do not change actual stream volume if the stream is muted
5055    if (mOutputs.valueFor(output)->mMuteCount[stream] != 0) {
5056        ALOGVV("checkAndSetVolume() stream %d muted count %d",
5057              stream, mOutputs.valueFor(output)->mMuteCount[stream]);
5058        return NO_ERROR;
5059    }
5060
5061    // do not change in call volume if bluetooth is connected and vice versa
5062    if ((stream == AUDIO_STREAM_VOICE_CALL &&
5063            mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] == AUDIO_POLICY_FORCE_BT_SCO) ||
5064        (stream == AUDIO_STREAM_BLUETOOTH_SCO &&
5065                mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] != AUDIO_POLICY_FORCE_BT_SCO)) {
5066        ALOGV("checkAndSetVolume() cannot set stream %d volume with force use = %d for comm",
5067             stream, mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]);
5068        return INVALID_OPERATION;
5069    }
5070
5071    float volume = computeVolume(stream, index, output, device);
5072    // We actually change the volume if:
5073    // - the float value returned by computeVolume() changed
5074    // - the force flag is set
5075    if (volume != mOutputs.valueFor(output)->mCurVolume[stream] ||
5076            force) {
5077        mOutputs.valueFor(output)->mCurVolume[stream] = volume;
5078        ALOGVV("checkAndSetVolume() for output %d stream %d, volume %f, delay %d", output, stream, volume, delayMs);
5079        // Force VOICE_CALL to track BLUETOOTH_SCO stream volume when bluetooth audio is
5080        // enabled
5081        if (stream == AUDIO_STREAM_BLUETOOTH_SCO) {
5082            mpClientInterface->setStreamVolume(AUDIO_STREAM_VOICE_CALL, volume, output, delayMs);
5083        }
5084        mpClientInterface->setStreamVolume(stream, volume, output, delayMs);
5085    }
5086
5087    if (stream == AUDIO_STREAM_VOICE_CALL ||
5088        stream == AUDIO_STREAM_BLUETOOTH_SCO) {
5089        float voiceVolume;
5090        // Force voice volume to max for bluetooth SCO as volume is managed by the headset
5091        if (stream == AUDIO_STREAM_VOICE_CALL) {
5092            voiceVolume = (float)index/(float)mStreams[stream].mIndexMax;
5093        } else {
5094            voiceVolume = 1.0;
5095        }
5096
5097        if (voiceVolume != mLastVoiceVolume && output == mPrimaryOutput) {
5098            mpClientInterface->setVoiceVolume(voiceVolume, delayMs);
5099            mLastVoiceVolume = voiceVolume;
5100        }
5101    }
5102
5103    return NO_ERROR;
5104}
5105
5106void AudioPolicyManager::applyStreamVolumes(audio_io_handle_t output,
5107                                                audio_devices_t device,
5108                                                int delayMs,
5109                                                bool force)
5110{
5111    ALOGVV("applyStreamVolumes() for output %d and device %x", output, device);
5112
5113    for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
5114        checkAndSetVolume((audio_stream_type_t)stream,
5115                          mStreams[stream].getVolumeIndex(device),
5116                          output,
5117                          device,
5118                          delayMs,
5119                          force);
5120    }
5121}
5122
5123void AudioPolicyManager::setStrategyMute(routing_strategy strategy,
5124                                             bool on,
5125                                             audio_io_handle_t output,
5126                                             int delayMs,
5127                                             audio_devices_t device)
5128{
5129    ALOGVV("setStrategyMute() strategy %d, mute %d, output %d", strategy, on, output);
5130    for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
5131        if (getStrategy((audio_stream_type_t)stream) == strategy) {
5132            setStreamMute((audio_stream_type_t)stream, on, output, delayMs, device);
5133        }
5134    }
5135}
5136
5137void AudioPolicyManager::setStreamMute(audio_stream_type_t stream,
5138                                           bool on,
5139                                           audio_io_handle_t output,
5140                                           int delayMs,
5141                                           audio_devices_t device)
5142{
5143    StreamDescriptor &streamDesc = mStreams[stream];
5144    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
5145    if (device == AUDIO_DEVICE_NONE) {
5146        device = outputDesc->device();
5147    }
5148
5149    ALOGVV("setStreamMute() stream %d, mute %d, output %d, mMuteCount %d device %04x",
5150          stream, on, output, outputDesc->mMuteCount[stream], device);
5151
5152    if (on) {
5153        if (outputDesc->mMuteCount[stream] == 0) {
5154            if (streamDesc.mCanBeMuted &&
5155                    ((stream != AUDIO_STREAM_ENFORCED_AUDIBLE) ||
5156                     (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_NONE))) {
5157                checkAndSetVolume(stream, 0, output, device, delayMs);
5158            }
5159        }
5160        // increment mMuteCount after calling checkAndSetVolume() so that volume change is not ignored
5161        outputDesc->mMuteCount[stream]++;
5162    } else {
5163        if (outputDesc->mMuteCount[stream] == 0) {
5164            ALOGV("setStreamMute() unmuting non muted stream!");
5165            return;
5166        }
5167        if (--outputDesc->mMuteCount[stream] == 0) {
5168            checkAndSetVolume(stream,
5169                              streamDesc.getVolumeIndex(device),
5170                              output,
5171                              device,
5172                              delayMs);
5173        }
5174    }
5175}
5176
5177void AudioPolicyManager::handleIncallSonification(audio_stream_type_t stream,
5178                                                      bool starting, bool stateChange)
5179{
5180    // if the stream pertains to sonification strategy and we are in call we must
5181    // mute the stream if it is low visibility. If it is high visibility, we must play a tone
5182    // in the device used for phone strategy and play the tone if the selected device does not
5183    // interfere with the device used for phone strategy
5184    // if stateChange is true, we are called from setPhoneState() and we must mute or unmute as
5185    // many times as there are active tracks on the output
5186    const routing_strategy stream_strategy = getStrategy(stream);
5187    if ((stream_strategy == STRATEGY_SONIFICATION) ||
5188            ((stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL))) {
5189        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
5190        ALOGV("handleIncallSonification() stream %d starting %d device %x stateChange %d",
5191                stream, starting, outputDesc->mDevice, stateChange);
5192        if (outputDesc->mRefCount[stream]) {
5193            int muteCount = 1;
5194            if (stateChange) {
5195                muteCount = outputDesc->mRefCount[stream];
5196            }
5197            if (audio_is_low_visibility(stream)) {
5198                ALOGV("handleIncallSonification() low visibility, muteCount %d", muteCount);
5199                for (int i = 0; i < muteCount; i++) {
5200                    setStreamMute(stream, starting, mPrimaryOutput);
5201                }
5202            } else {
5203                ALOGV("handleIncallSonification() high visibility");
5204                if (outputDesc->device() &
5205                        getDeviceForStrategy(STRATEGY_PHONE, true /*fromCache*/)) {
5206                    ALOGV("handleIncallSonification() high visibility muted, muteCount %d", muteCount);
5207                    for (int i = 0; i < muteCount; i++) {
5208                        setStreamMute(stream, starting, mPrimaryOutput);
5209                    }
5210                }
5211                if (starting) {
5212                    mpClientInterface->startTone(AUDIO_POLICY_TONE_IN_CALL_NOTIFICATION,
5213                                                 AUDIO_STREAM_VOICE_CALL);
5214                } else {
5215                    mpClientInterface->stopTone();
5216                }
5217            }
5218        }
5219    }
5220}
5221
5222bool AudioPolicyManager::isInCall()
5223{
5224    return isStateInCall(mPhoneState);
5225}
5226
5227bool AudioPolicyManager::isStateInCall(int state) {
5228    return ((state == AUDIO_MODE_IN_CALL) ||
5229            (state == AUDIO_MODE_IN_COMMUNICATION));
5230}
5231
5232uint32_t AudioPolicyManager::getMaxEffectsCpuLoad()
5233{
5234    return MAX_EFFECTS_CPU_LOAD;
5235}
5236
5237uint32_t AudioPolicyManager::getMaxEffectsMemory()
5238{
5239    return MAX_EFFECTS_MEMORY;
5240}
5241
5242
5243// --- AudioOutputDescriptor class implementation
5244
5245AudioPolicyManager::AudioOutputDescriptor::AudioOutputDescriptor(
5246        const sp<IOProfile>& profile)
5247    : mId(0), mIoHandle(0), mLatency(0),
5248    mFlags((audio_output_flags_t)0), mDevice(AUDIO_DEVICE_NONE), mPatchHandle(0),
5249    mOutput1(0), mOutput2(0), mProfile(profile), mDirectOpenCount(0)
5250{
5251    // clear usage count for all stream types
5252    for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
5253        mRefCount[i] = 0;
5254        mCurVolume[i] = -1.0;
5255        mMuteCount[i] = 0;
5256        mStopTime[i] = 0;
5257    }
5258    for (int i = 0; i < NUM_STRATEGIES; i++) {
5259        mStrategyMutedByDevice[i] = false;
5260    }
5261    if (profile != NULL) {
5262        mFlags = (audio_output_flags_t)profile->mFlags;
5263        mSamplingRate = profile->pickSamplingRate();
5264        mFormat = profile->pickFormat();
5265        mChannelMask = profile->pickChannelMask();
5266        if (profile->mGains.size() > 0) {
5267            profile->mGains[0]->getDefaultConfig(&mGain);
5268        }
5269    }
5270}
5271
5272audio_devices_t AudioPolicyManager::AudioOutputDescriptor::device() const
5273{
5274    if (isDuplicated()) {
5275        return (audio_devices_t)(mOutput1->mDevice | mOutput2->mDevice);
5276    } else {
5277        return mDevice;
5278    }
5279}
5280
5281uint32_t AudioPolicyManager::AudioOutputDescriptor::latency()
5282{
5283    if (isDuplicated()) {
5284        return (mOutput1->mLatency > mOutput2->mLatency) ? mOutput1->mLatency : mOutput2->mLatency;
5285    } else {
5286        return mLatency;
5287    }
5288}
5289
5290bool AudioPolicyManager::AudioOutputDescriptor::sharesHwModuleWith(
5291        const sp<AudioOutputDescriptor> outputDesc)
5292{
5293    if (isDuplicated()) {
5294        return mOutput1->sharesHwModuleWith(outputDesc) || mOutput2->sharesHwModuleWith(outputDesc);
5295    } else if (outputDesc->isDuplicated()){
5296        return sharesHwModuleWith(outputDesc->mOutput1) || sharesHwModuleWith(outputDesc->mOutput2);
5297    } else {
5298        return (mProfile->mModule == outputDesc->mProfile->mModule);
5299    }
5300}
5301
5302void AudioPolicyManager::AudioOutputDescriptor::changeRefCount(audio_stream_type_t stream,
5303                                                                   int delta)
5304{
5305    // forward usage count change to attached outputs
5306    if (isDuplicated()) {
5307        mOutput1->changeRefCount(stream, delta);
5308        mOutput2->changeRefCount(stream, delta);
5309    }
5310    if ((delta + (int)mRefCount[stream]) < 0) {
5311        ALOGW("changeRefCount() invalid delta %d for stream %d, refCount %d",
5312              delta, stream, mRefCount[stream]);
5313        mRefCount[stream] = 0;
5314        return;
5315    }
5316    mRefCount[stream] += delta;
5317    ALOGV("changeRefCount() stream %d, count %d", stream, mRefCount[stream]);
5318}
5319
5320audio_devices_t AudioPolicyManager::AudioOutputDescriptor::supportedDevices()
5321{
5322    if (isDuplicated()) {
5323        return (audio_devices_t)(mOutput1->supportedDevices() | mOutput2->supportedDevices());
5324    } else {
5325        return mProfile->mSupportedDevices.types() ;
5326    }
5327}
5328
5329bool AudioPolicyManager::AudioOutputDescriptor::isActive(uint32_t inPastMs) const
5330{
5331    return isStrategyActive(NUM_STRATEGIES, inPastMs);
5332}
5333
5334bool AudioPolicyManager::AudioOutputDescriptor::isStrategyActive(routing_strategy strategy,
5335                                                                       uint32_t inPastMs,
5336                                                                       nsecs_t sysTime) const
5337{
5338    if ((sysTime == 0) && (inPastMs != 0)) {
5339        sysTime = systemTime();
5340    }
5341    for (int i = 0; i < (int)AUDIO_STREAM_CNT; i++) {
5342        if (((getStrategy((audio_stream_type_t)i) == strategy) ||
5343                (NUM_STRATEGIES == strategy)) &&
5344                isStreamActive((audio_stream_type_t)i, inPastMs, sysTime)) {
5345            return true;
5346        }
5347    }
5348    return false;
5349}
5350
5351bool AudioPolicyManager::AudioOutputDescriptor::isStreamActive(audio_stream_type_t stream,
5352                                                                       uint32_t inPastMs,
5353                                                                       nsecs_t sysTime) const
5354{
5355    if (mRefCount[stream] != 0) {
5356        return true;
5357    }
5358    if (inPastMs == 0) {
5359        return false;
5360    }
5361    if (sysTime == 0) {
5362        sysTime = systemTime();
5363    }
5364    if (ns2ms(sysTime - mStopTime[stream]) < inPastMs) {
5365        return true;
5366    }
5367    return false;
5368}
5369
5370void AudioPolicyManager::AudioOutputDescriptor::toAudioPortConfig(
5371                                                 struct audio_port_config *dstConfig,
5372                                                 const struct audio_port_config *srcConfig) const
5373{
5374    ALOG_ASSERT(!isDuplicated(), "toAudioPortConfig() called on duplicated output %d", mIoHandle);
5375
5376    dstConfig->config_mask = AUDIO_PORT_CONFIG_SAMPLE_RATE|AUDIO_PORT_CONFIG_CHANNEL_MASK|
5377                            AUDIO_PORT_CONFIG_FORMAT|AUDIO_PORT_CONFIG_GAIN;
5378    if (srcConfig != NULL) {
5379        dstConfig->config_mask |= srcConfig->config_mask;
5380    }
5381    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
5382
5383    dstConfig->id = mId;
5384    dstConfig->role = AUDIO_PORT_ROLE_SOURCE;
5385    dstConfig->type = AUDIO_PORT_TYPE_MIX;
5386    dstConfig->ext.mix.hw_module = mProfile->mModule->mHandle;
5387    dstConfig->ext.mix.handle = mIoHandle;
5388    dstConfig->ext.mix.usecase.stream = AUDIO_STREAM_DEFAULT;
5389}
5390
5391void AudioPolicyManager::AudioOutputDescriptor::toAudioPort(
5392                                                    struct audio_port *port) const
5393{
5394    ALOG_ASSERT(!isDuplicated(), "toAudioPort() called on duplicated output %d", mIoHandle);
5395    mProfile->toAudioPort(port);
5396    port->id = mId;
5397    toAudioPortConfig(&port->active_config);
5398    port->ext.mix.hw_module = mProfile->mModule->mHandle;
5399    port->ext.mix.handle = mIoHandle;
5400    port->ext.mix.latency_class =
5401            mFlags & AUDIO_OUTPUT_FLAG_FAST ? AUDIO_LATENCY_LOW : AUDIO_LATENCY_NORMAL;
5402}
5403
5404status_t AudioPolicyManager::AudioOutputDescriptor::dump(int fd)
5405{
5406    const size_t SIZE = 256;
5407    char buffer[SIZE];
5408    String8 result;
5409
5410    snprintf(buffer, SIZE, " ID: %d\n", mId);
5411    result.append(buffer);
5412    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
5413    result.append(buffer);
5414    snprintf(buffer, SIZE, " Format: %08x\n", mFormat);
5415    result.append(buffer);
5416    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
5417    result.append(buffer);
5418    snprintf(buffer, SIZE, " Latency: %d\n", mLatency);
5419    result.append(buffer);
5420    snprintf(buffer, SIZE, " Flags %08x\n", mFlags);
5421    result.append(buffer);
5422    snprintf(buffer, SIZE, " Devices %08x\n", device());
5423    result.append(buffer);
5424    snprintf(buffer, SIZE, " Stream volume refCount muteCount\n");
5425    result.append(buffer);
5426    for (int i = 0; i < (int)AUDIO_STREAM_CNT; i++) {
5427        snprintf(buffer, SIZE, " %02d     %.03f     %02d       %02d\n",
5428                 i, mCurVolume[i], mRefCount[i], mMuteCount[i]);
5429        result.append(buffer);
5430    }
5431    write(fd, result.string(), result.size());
5432
5433    return NO_ERROR;
5434}
5435
5436// --- AudioInputDescriptor class implementation
5437
5438AudioPolicyManager::AudioInputDescriptor::AudioInputDescriptor(const sp<IOProfile>& profile)
5439    : mId(0), mIoHandle(0),
5440      mDevice(AUDIO_DEVICE_NONE), mPatchHandle(0), mRefCount(0),
5441      mInputSource(AUDIO_SOURCE_DEFAULT), mProfile(profile), mIsSoundTrigger(false)
5442{
5443    if (profile != NULL) {
5444        mSamplingRate = profile->pickSamplingRate();
5445        mFormat = profile->pickFormat();
5446        mChannelMask = profile->pickChannelMask();
5447        if (profile->mGains.size() > 0) {
5448            profile->mGains[0]->getDefaultConfig(&mGain);
5449        }
5450    }
5451}
5452
5453void AudioPolicyManager::AudioInputDescriptor::toAudioPortConfig(
5454                                                   struct audio_port_config *dstConfig,
5455                                                   const struct audio_port_config *srcConfig) const
5456{
5457    ALOG_ASSERT(mProfile != 0,
5458                "toAudioPortConfig() called on input with null profile %d", mIoHandle);
5459    dstConfig->config_mask = AUDIO_PORT_CONFIG_SAMPLE_RATE|AUDIO_PORT_CONFIG_CHANNEL_MASK|
5460                            AUDIO_PORT_CONFIG_FORMAT|AUDIO_PORT_CONFIG_GAIN;
5461    if (srcConfig != NULL) {
5462        dstConfig->config_mask |= srcConfig->config_mask;
5463    }
5464
5465    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
5466
5467    dstConfig->id = mId;
5468    dstConfig->role = AUDIO_PORT_ROLE_SINK;
5469    dstConfig->type = AUDIO_PORT_TYPE_MIX;
5470    dstConfig->ext.mix.hw_module = mProfile->mModule->mHandle;
5471    dstConfig->ext.mix.handle = mIoHandle;
5472    dstConfig->ext.mix.usecase.source = mInputSource;
5473}
5474
5475void AudioPolicyManager::AudioInputDescriptor::toAudioPort(
5476                                                    struct audio_port *port) const
5477{
5478    ALOG_ASSERT(mProfile != 0, "toAudioPort() called on input with null profile %d", mIoHandle);
5479
5480    mProfile->toAudioPort(port);
5481    port->id = mId;
5482    toAudioPortConfig(&port->active_config);
5483    port->ext.mix.hw_module = mProfile->mModule->mHandle;
5484    port->ext.mix.handle = mIoHandle;
5485    port->ext.mix.latency_class = AUDIO_LATENCY_NORMAL;
5486}
5487
5488status_t AudioPolicyManager::AudioInputDescriptor::dump(int fd)
5489{
5490    const size_t SIZE = 256;
5491    char buffer[SIZE];
5492    String8 result;
5493
5494    snprintf(buffer, SIZE, " ID: %d\n", mId);
5495    result.append(buffer);
5496    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
5497    result.append(buffer);
5498    snprintf(buffer, SIZE, " Format: %d\n", mFormat);
5499    result.append(buffer);
5500    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
5501    result.append(buffer);
5502    snprintf(buffer, SIZE, " Devices %08x\n", mDevice);
5503    result.append(buffer);
5504    snprintf(buffer, SIZE, " Ref Count %d\n", mRefCount);
5505    result.append(buffer);
5506    snprintf(buffer, SIZE, " Open Ref Count %d\n", mOpenRefCount);
5507    result.append(buffer);
5508
5509    write(fd, result.string(), result.size());
5510
5511    return NO_ERROR;
5512}
5513
5514// --- StreamDescriptor class implementation
5515
5516AudioPolicyManager::StreamDescriptor::StreamDescriptor()
5517    :   mIndexMin(0), mIndexMax(1), mCanBeMuted(true)
5518{
5519    mIndexCur.add(AUDIO_DEVICE_OUT_DEFAULT, 0);
5520}
5521
5522int AudioPolicyManager::StreamDescriptor::getVolumeIndex(audio_devices_t device)
5523{
5524    device = AudioPolicyManager::getDeviceForVolume(device);
5525    // there is always a valid entry for AUDIO_DEVICE_OUT_DEFAULT
5526    if (mIndexCur.indexOfKey(device) < 0) {
5527        device = AUDIO_DEVICE_OUT_DEFAULT;
5528    }
5529    return mIndexCur.valueFor(device);
5530}
5531
5532void AudioPolicyManager::StreamDescriptor::dump(int fd)
5533{
5534    const size_t SIZE = 256;
5535    char buffer[SIZE];
5536    String8 result;
5537
5538    snprintf(buffer, SIZE, "%s         %02d         %02d         ",
5539             mCanBeMuted ? "true " : "false", mIndexMin, mIndexMax);
5540    result.append(buffer);
5541    for (size_t i = 0; i < mIndexCur.size(); i++) {
5542        snprintf(buffer, SIZE, "%04x : %02d, ",
5543                 mIndexCur.keyAt(i),
5544                 mIndexCur.valueAt(i));
5545        result.append(buffer);
5546    }
5547    result.append("\n");
5548
5549    write(fd, result.string(), result.size());
5550}
5551
5552// --- EffectDescriptor class implementation
5553
5554status_t AudioPolicyManager::EffectDescriptor::dump(int fd)
5555{
5556    const size_t SIZE = 256;
5557    char buffer[SIZE];
5558    String8 result;
5559
5560    snprintf(buffer, SIZE, " I/O: %d\n", mIo);
5561    result.append(buffer);
5562    snprintf(buffer, SIZE, " Strategy: %d\n", mStrategy);
5563    result.append(buffer);
5564    snprintf(buffer, SIZE, " Session: %d\n", mSession);
5565    result.append(buffer);
5566    snprintf(buffer, SIZE, " Name: %s\n",  mDesc.name);
5567    result.append(buffer);
5568    snprintf(buffer, SIZE, " %s\n",  mEnabled ? "Enabled" : "Disabled");
5569    result.append(buffer);
5570    write(fd, result.string(), result.size());
5571
5572    return NO_ERROR;
5573}
5574
5575// --- HwModule class implementation
5576
5577AudioPolicyManager::HwModule::HwModule(const char *name)
5578    : mName(strndup(name, AUDIO_HARDWARE_MODULE_ID_MAX_LEN)),
5579      mHalVersion(AUDIO_DEVICE_API_VERSION_MIN), mHandle(0)
5580{
5581}
5582
5583AudioPolicyManager::HwModule::~HwModule()
5584{
5585    for (size_t i = 0; i < mOutputProfiles.size(); i++) {
5586        mOutputProfiles[i]->mSupportedDevices.clear();
5587    }
5588    for (size_t i = 0; i < mInputProfiles.size(); i++) {
5589        mInputProfiles[i]->mSupportedDevices.clear();
5590    }
5591    free((void *)mName);
5592}
5593
5594status_t AudioPolicyManager::HwModule::loadInput(cnode *root)
5595{
5596    cnode *node = root->first_child;
5597
5598    sp<IOProfile> profile = new IOProfile(String8(root->name), AUDIO_PORT_ROLE_SINK, this);
5599
5600    while (node) {
5601        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
5602            profile->loadSamplingRates((char *)node->value);
5603        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
5604            profile->loadFormats((char *)node->value);
5605        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
5606            profile->loadInChannels((char *)node->value);
5607        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
5608            profile->mSupportedDevices.loadDevicesFromName((char *)node->value,
5609                                                           mDeclaredDevices);
5610        } else if (strcmp(node->name, FLAGS_TAG) == 0) {
5611            profile->mFlags = parseInputFlagNames((char *)node->value);
5612        } else if (strcmp(node->name, GAINS_TAG) == 0) {
5613            profile->loadGains(node);
5614        }
5615        node = node->next;
5616    }
5617    ALOGW_IF(profile->mSupportedDevices.isEmpty(),
5618            "loadInput() invalid supported devices");
5619    ALOGW_IF(profile->mChannelMasks.size() == 0,
5620            "loadInput() invalid supported channel masks");
5621    ALOGW_IF(profile->mSamplingRates.size() == 0,
5622            "loadInput() invalid supported sampling rates");
5623    ALOGW_IF(profile->mFormats.size() == 0,
5624            "loadInput() invalid supported formats");
5625    if (!profile->mSupportedDevices.isEmpty() &&
5626            (profile->mChannelMasks.size() != 0) &&
5627            (profile->mSamplingRates.size() != 0) &&
5628            (profile->mFormats.size() != 0)) {
5629
5630        ALOGV("loadInput() adding input Supported Devices %04x",
5631              profile->mSupportedDevices.types());
5632
5633        mInputProfiles.add(profile);
5634        return NO_ERROR;
5635    } else {
5636        return BAD_VALUE;
5637    }
5638}
5639
5640status_t AudioPolicyManager::HwModule::loadOutput(cnode *root)
5641{
5642    cnode *node = root->first_child;
5643
5644    sp<IOProfile> profile = new IOProfile(String8(root->name), AUDIO_PORT_ROLE_SOURCE, this);
5645
5646    while (node) {
5647        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
5648            profile->loadSamplingRates((char *)node->value);
5649        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
5650            profile->loadFormats((char *)node->value);
5651        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
5652            profile->loadOutChannels((char *)node->value);
5653        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
5654            profile->mSupportedDevices.loadDevicesFromName((char *)node->value,
5655                                                           mDeclaredDevices);
5656        } else if (strcmp(node->name, FLAGS_TAG) == 0) {
5657            profile->mFlags = parseOutputFlagNames((char *)node->value);
5658        } else if (strcmp(node->name, GAINS_TAG) == 0) {
5659            profile->loadGains(node);
5660        }
5661        node = node->next;
5662    }
5663    ALOGW_IF(profile->mSupportedDevices.isEmpty(),
5664            "loadOutput() invalid supported devices");
5665    ALOGW_IF(profile->mChannelMasks.size() == 0,
5666            "loadOutput() invalid supported channel masks");
5667    ALOGW_IF(profile->mSamplingRates.size() == 0,
5668            "loadOutput() invalid supported sampling rates");
5669    ALOGW_IF(profile->mFormats.size() == 0,
5670            "loadOutput() invalid supported formats");
5671    if (!profile->mSupportedDevices.isEmpty() &&
5672            (profile->mChannelMasks.size() != 0) &&
5673            (profile->mSamplingRates.size() != 0) &&
5674            (profile->mFormats.size() != 0)) {
5675
5676        ALOGV("loadOutput() adding output Supported Devices %04x, mFlags %04x",
5677              profile->mSupportedDevices.types(), profile->mFlags);
5678
5679        mOutputProfiles.add(profile);
5680        return NO_ERROR;
5681    } else {
5682        return BAD_VALUE;
5683    }
5684}
5685
5686status_t AudioPolicyManager::HwModule::loadDevice(cnode *root)
5687{
5688    cnode *node = root->first_child;
5689
5690    audio_devices_t type = AUDIO_DEVICE_NONE;
5691    while (node) {
5692        if (strcmp(node->name, DEVICE_TYPE) == 0) {
5693            type = parseDeviceNames((char *)node->value);
5694            break;
5695        }
5696        node = node->next;
5697    }
5698    if (type == AUDIO_DEVICE_NONE ||
5699            (!audio_is_input_device(type) && !audio_is_output_device(type))) {
5700        ALOGW("loadDevice() bad type %08x", type);
5701        return BAD_VALUE;
5702    }
5703    sp<DeviceDescriptor> deviceDesc = new DeviceDescriptor(String8(root->name), type);
5704    deviceDesc->mModule = this;
5705
5706    node = root->first_child;
5707    while (node) {
5708        if (strcmp(node->name, DEVICE_ADDRESS) == 0) {
5709            deviceDesc->mAddress = String8((char *)node->value);
5710        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
5711            if (audio_is_input_device(type)) {
5712                deviceDesc->loadInChannels((char *)node->value);
5713            } else {
5714                deviceDesc->loadOutChannels((char *)node->value);
5715            }
5716        } else if (strcmp(node->name, GAINS_TAG) == 0) {
5717            deviceDesc->loadGains(node);
5718        }
5719        node = node->next;
5720    }
5721
5722    ALOGV("loadDevice() adding device name %s type %08x address %s",
5723          deviceDesc->mName.string(), type, deviceDesc->mAddress.string());
5724
5725    mDeclaredDevices.add(deviceDesc);
5726
5727    return NO_ERROR;
5728}
5729
5730void AudioPolicyManager::HwModule::dump(int fd)
5731{
5732    const size_t SIZE = 256;
5733    char buffer[SIZE];
5734    String8 result;
5735
5736    snprintf(buffer, SIZE, "  - name: %s\n", mName);
5737    result.append(buffer);
5738    snprintf(buffer, SIZE, "  - handle: %d\n", mHandle);
5739    result.append(buffer);
5740    snprintf(buffer, SIZE, "  - version: %u.%u\n", mHalVersion >> 8, mHalVersion & 0xFF);
5741    result.append(buffer);
5742    write(fd, result.string(), result.size());
5743    if (mOutputProfiles.size()) {
5744        write(fd, "  - outputs:\n", strlen("  - outputs:\n"));
5745        for (size_t i = 0; i < mOutputProfiles.size(); i++) {
5746            snprintf(buffer, SIZE, "    output %zu:\n", i);
5747            write(fd, buffer, strlen(buffer));
5748            mOutputProfiles[i]->dump(fd);
5749        }
5750    }
5751    if (mInputProfiles.size()) {
5752        write(fd, "  - inputs:\n", strlen("  - inputs:\n"));
5753        for (size_t i = 0; i < mInputProfiles.size(); i++) {
5754            snprintf(buffer, SIZE, "    input %zu:\n", i);
5755            write(fd, buffer, strlen(buffer));
5756            mInputProfiles[i]->dump(fd);
5757        }
5758    }
5759    if (mDeclaredDevices.size()) {
5760        write(fd, "  - devices:\n", strlen("  - devices:\n"));
5761        for (size_t i = 0; i < mDeclaredDevices.size(); i++) {
5762            mDeclaredDevices[i]->dump(fd, 4, i);
5763        }
5764    }
5765}
5766
5767// --- AudioPort class implementation
5768
5769
5770AudioPolicyManager::AudioPort::AudioPort(const String8& name, audio_port_type_t type,
5771          audio_port_role_t role, const sp<HwModule>& module) :
5772    mName(name), mType(type), mRole(role), mModule(module), mFlags(0)
5773{
5774    mUseInChannelMask = ((type == AUDIO_PORT_TYPE_DEVICE) && (role == AUDIO_PORT_ROLE_SOURCE)) ||
5775                    ((type == AUDIO_PORT_TYPE_MIX) && (role == AUDIO_PORT_ROLE_SINK));
5776}
5777
5778void AudioPolicyManager::AudioPort::toAudioPort(struct audio_port *port) const
5779{
5780    port->role = mRole;
5781    port->type = mType;
5782    unsigned int i;
5783    for (i = 0; i < mSamplingRates.size() && i < AUDIO_PORT_MAX_SAMPLING_RATES; i++) {
5784        if (mSamplingRates[i] != 0) {
5785            port->sample_rates[i] = mSamplingRates[i];
5786        }
5787    }
5788    port->num_sample_rates = i;
5789    for (i = 0; i < mChannelMasks.size() && i < AUDIO_PORT_MAX_CHANNEL_MASKS; i++) {
5790        if (mChannelMasks[i] != 0) {
5791            port->channel_masks[i] = mChannelMasks[i];
5792        }
5793    }
5794    port->num_channel_masks = i;
5795    for (i = 0; i < mFormats.size() && i < AUDIO_PORT_MAX_FORMATS; i++) {
5796        if (mFormats[i] != 0) {
5797            port->formats[i] = mFormats[i];
5798        }
5799    }
5800    port->num_formats = i;
5801
5802    ALOGV("AudioPort::toAudioPort() num gains %zu", mGains.size());
5803
5804    for (i = 0; i < mGains.size() && i < AUDIO_PORT_MAX_GAINS; i++) {
5805        port->gains[i] = mGains[i]->mGain;
5806    }
5807    port->num_gains = i;
5808}
5809
5810void AudioPolicyManager::AudioPort::importAudioPort(const sp<AudioPort> port) {
5811    for (size_t k = 0 ; k < port->mSamplingRates.size() ; k++) {
5812        const uint32_t rate = port->mSamplingRates.itemAt(k);
5813        if (rate != 0) { // skip "dynamic" rates
5814            bool hasRate = false;
5815            for (size_t l = 0 ; l < mSamplingRates.size() ; l++) {
5816                if (rate == mSamplingRates.itemAt(l)) {
5817                    hasRate = true;
5818                    break;
5819                }
5820            }
5821            if (!hasRate) { // never import a sampling rate twice
5822                mSamplingRates.add(rate);
5823            }
5824        }
5825    }
5826    for (size_t k = 0 ; k < port->mChannelMasks.size() ; k++) {
5827        const audio_channel_mask_t mask = port->mChannelMasks.itemAt(k);
5828        if (mask != 0) { // skip "dynamic" masks
5829            bool hasMask = false;
5830            for (size_t l = 0 ; l < mChannelMasks.size() ; l++) {
5831                if (mask == mChannelMasks.itemAt(l)) {
5832                    hasMask = true;
5833                    break;
5834                }
5835            }
5836            if (!hasMask) { // never import a channel mask twice
5837                mChannelMasks.add(mask);
5838            }
5839        }
5840    }
5841    for (size_t k = 0 ; k < port->mFormats.size() ; k++) {
5842        const audio_format_t format = port->mFormats.itemAt(k);
5843        if (format != 0) { // skip "dynamic" formats
5844            bool hasFormat = false;
5845            for (size_t l = 0 ; l < mFormats.size() ; l++) {
5846                if (format == mFormats.itemAt(l)) {
5847                    hasFormat = true;
5848                    break;
5849                }
5850            }
5851            if (!hasFormat) { // never import a channel mask twice
5852                mFormats.add(format);
5853            }
5854        }
5855    }
5856}
5857
5858void AudioPolicyManager::AudioPort::clearCapabilities() {
5859    mChannelMasks.clear();
5860    mFormats.clear();
5861    mSamplingRates.clear();
5862}
5863
5864void AudioPolicyManager::AudioPort::loadSamplingRates(char *name)
5865{
5866    char *str = strtok(name, "|");
5867
5868    // by convention, "0' in the first entry in mSamplingRates indicates the supported sampling
5869    // rates should be read from the output stream after it is opened for the first time
5870    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
5871        mSamplingRates.add(0);
5872        return;
5873    }
5874
5875    while (str != NULL) {
5876        uint32_t rate = atoi(str);
5877        if (rate != 0) {
5878            ALOGV("loadSamplingRates() adding rate %d", rate);
5879            mSamplingRates.add(rate);
5880        }
5881        str = strtok(NULL, "|");
5882    }
5883}
5884
5885void AudioPolicyManager::AudioPort::loadFormats(char *name)
5886{
5887    char *str = strtok(name, "|");
5888
5889    // by convention, "0' in the first entry in mFormats indicates the supported formats
5890    // should be read from the output stream after it is opened for the first time
5891    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
5892        mFormats.add(AUDIO_FORMAT_DEFAULT);
5893        return;
5894    }
5895
5896    while (str != NULL) {
5897        audio_format_t format = (audio_format_t)stringToEnum(sFormatNameToEnumTable,
5898                                                             ARRAY_SIZE(sFormatNameToEnumTable),
5899                                                             str);
5900        if (format != AUDIO_FORMAT_DEFAULT) {
5901            mFormats.add(format);
5902        }
5903        str = strtok(NULL, "|");
5904    }
5905}
5906
5907void AudioPolicyManager::AudioPort::loadInChannels(char *name)
5908{
5909    const char *str = strtok(name, "|");
5910
5911    ALOGV("loadInChannels() %s", name);
5912
5913    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
5914        mChannelMasks.add(0);
5915        return;
5916    }
5917
5918    while (str != NULL) {
5919        audio_channel_mask_t channelMask =
5920                (audio_channel_mask_t)stringToEnum(sInChannelsNameToEnumTable,
5921                                                   ARRAY_SIZE(sInChannelsNameToEnumTable),
5922                                                   str);
5923        if (channelMask != 0) {
5924            ALOGV("loadInChannels() adding channelMask %04x", channelMask);
5925            mChannelMasks.add(channelMask);
5926        }
5927        str = strtok(NULL, "|");
5928    }
5929}
5930
5931void AudioPolicyManager::AudioPort::loadOutChannels(char *name)
5932{
5933    const char *str = strtok(name, "|");
5934
5935    ALOGV("loadOutChannels() %s", name);
5936
5937    // by convention, "0' in the first entry in mChannelMasks indicates the supported channel
5938    // masks should be read from the output stream after it is opened for the first time
5939    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
5940        mChannelMasks.add(0);
5941        return;
5942    }
5943
5944    while (str != NULL) {
5945        audio_channel_mask_t channelMask =
5946                (audio_channel_mask_t)stringToEnum(sOutChannelsNameToEnumTable,
5947                                                   ARRAY_SIZE(sOutChannelsNameToEnumTable),
5948                                                   str);
5949        if (channelMask != 0) {
5950            mChannelMasks.add(channelMask);
5951        }
5952        str = strtok(NULL, "|");
5953    }
5954    return;
5955}
5956
5957audio_gain_mode_t AudioPolicyManager::AudioPort::loadGainMode(char *name)
5958{
5959    const char *str = strtok(name, "|");
5960
5961    ALOGV("loadGainMode() %s", name);
5962    audio_gain_mode_t mode = 0;
5963    while (str != NULL) {
5964        mode |= (audio_gain_mode_t)stringToEnum(sGainModeNameToEnumTable,
5965                                                ARRAY_SIZE(sGainModeNameToEnumTable),
5966                                                str);
5967        str = strtok(NULL, "|");
5968    }
5969    return mode;
5970}
5971
5972void AudioPolicyManager::AudioPort::loadGain(cnode *root, int index)
5973{
5974    cnode *node = root->first_child;
5975
5976    sp<AudioGain> gain = new AudioGain(index, mUseInChannelMask);
5977
5978    while (node) {
5979        if (strcmp(node->name, GAIN_MODE) == 0) {
5980            gain->mGain.mode = loadGainMode((char *)node->value);
5981        } else if (strcmp(node->name, GAIN_CHANNELS) == 0) {
5982            if (mUseInChannelMask) {
5983                gain->mGain.channel_mask =
5984                        (audio_channel_mask_t)stringToEnum(sInChannelsNameToEnumTable,
5985                                                           ARRAY_SIZE(sInChannelsNameToEnumTable),
5986                                                           (char *)node->value);
5987            } else {
5988                gain->mGain.channel_mask =
5989                        (audio_channel_mask_t)stringToEnum(sOutChannelsNameToEnumTable,
5990                                                           ARRAY_SIZE(sOutChannelsNameToEnumTable),
5991                                                           (char *)node->value);
5992            }
5993        } else if (strcmp(node->name, GAIN_MIN_VALUE) == 0) {
5994            gain->mGain.min_value = atoi((char *)node->value);
5995        } else if (strcmp(node->name, GAIN_MAX_VALUE) == 0) {
5996            gain->mGain.max_value = atoi((char *)node->value);
5997        } else if (strcmp(node->name, GAIN_DEFAULT_VALUE) == 0) {
5998            gain->mGain.default_value = atoi((char *)node->value);
5999        } else if (strcmp(node->name, GAIN_STEP_VALUE) == 0) {
6000            gain->mGain.step_value = atoi((char *)node->value);
6001        } else if (strcmp(node->name, GAIN_MIN_RAMP_MS) == 0) {
6002            gain->mGain.min_ramp_ms = atoi((char *)node->value);
6003        } else if (strcmp(node->name, GAIN_MAX_RAMP_MS) == 0) {
6004            gain->mGain.max_ramp_ms = atoi((char *)node->value);
6005        }
6006        node = node->next;
6007    }
6008
6009    ALOGV("loadGain() adding new gain mode %08x channel mask %08x min mB %d max mB %d",
6010          gain->mGain.mode, gain->mGain.channel_mask, gain->mGain.min_value, gain->mGain.max_value);
6011
6012    if (gain->mGain.mode == 0) {
6013        return;
6014    }
6015    mGains.add(gain);
6016}
6017
6018void AudioPolicyManager::AudioPort::loadGains(cnode *root)
6019{
6020    cnode *node = root->first_child;
6021    int index = 0;
6022    while (node) {
6023        ALOGV("loadGains() loading gain %s", node->name);
6024        loadGain(node, index++);
6025        node = node->next;
6026    }
6027}
6028
6029status_t AudioPolicyManager::AudioPort::checkExactSamplingRate(uint32_t samplingRate) const
6030{
6031    for (size_t i = 0; i < mSamplingRates.size(); i ++) {
6032        if (mSamplingRates[i] == samplingRate) {
6033            return NO_ERROR;
6034        }
6035    }
6036    return BAD_VALUE;
6037}
6038
6039status_t AudioPolicyManager::AudioPort::checkCompatibleSamplingRate(uint32_t samplingRate,
6040        uint32_t *updatedSamplingRate) const
6041{
6042    // Search for the closest supported sampling rate that is above (preferred)
6043    // or below (acceptable) the desired sampling rate, within a permitted ratio.
6044    // The sampling rates do not need to be sorted in ascending order.
6045    ssize_t maxBelow = -1;
6046    ssize_t minAbove = -1;
6047    uint32_t candidate;
6048    for (size_t i = 0; i < mSamplingRates.size(); i++) {
6049        candidate = mSamplingRates[i];
6050        if (candidate == samplingRate) {
6051            if (updatedSamplingRate != NULL) {
6052                *updatedSamplingRate = candidate;
6053            }
6054            return NO_ERROR;
6055        }
6056        // candidate < desired
6057        if (candidate < samplingRate) {
6058            if (maxBelow < 0 || candidate > mSamplingRates[maxBelow]) {
6059                maxBelow = i;
6060            }
6061        // candidate > desired
6062        } else {
6063            if (minAbove < 0 || candidate < mSamplingRates[minAbove]) {
6064                minAbove = i;
6065            }
6066        }
6067    }
6068    // This uses hard-coded knowledge about AudioFlinger resampling ratios.
6069    // TODO Move these assumptions out.
6070    static const uint32_t kMaxDownSampleRatio = 6;  // beyond this aliasing occurs
6071    static const uint32_t kMaxUpSampleRatio = 256;  // beyond this sample rate inaccuracies occur
6072                                                    // due to approximation by an int32_t of the
6073                                                    // phase increments
6074    // Prefer to down-sample from a higher sampling rate, as we get the desired frequency spectrum.
6075    if (minAbove >= 0) {
6076        candidate = mSamplingRates[minAbove];
6077        if (candidate / kMaxDownSampleRatio <= samplingRate) {
6078            if (updatedSamplingRate != NULL) {
6079                *updatedSamplingRate = candidate;
6080            }
6081            return NO_ERROR;
6082        }
6083    }
6084    // But if we have to up-sample from a lower sampling rate, that's OK.
6085    if (maxBelow >= 0) {
6086        candidate = mSamplingRates[maxBelow];
6087        if (candidate * kMaxUpSampleRatio >= samplingRate) {
6088            if (updatedSamplingRate != NULL) {
6089                *updatedSamplingRate = candidate;
6090            }
6091            return NO_ERROR;
6092        }
6093    }
6094    // leave updatedSamplingRate unmodified
6095    return BAD_VALUE;
6096}
6097
6098status_t AudioPolicyManager::AudioPort::checkExactChannelMask(audio_channel_mask_t channelMask) const
6099{
6100    for (size_t i = 0; i < mChannelMasks.size(); i++) {
6101        if (mChannelMasks[i] == channelMask) {
6102            return NO_ERROR;
6103        }
6104    }
6105    return BAD_VALUE;
6106}
6107
6108status_t AudioPolicyManager::AudioPort::checkCompatibleChannelMask(audio_channel_mask_t channelMask)
6109        const
6110{
6111    const bool isRecordThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SINK;
6112    for (size_t i = 0; i < mChannelMasks.size(); i ++) {
6113        // FIXME Does not handle multi-channel automatic conversions yet
6114        audio_channel_mask_t supported = mChannelMasks[i];
6115        if (supported == channelMask) {
6116            return NO_ERROR;
6117        }
6118        if (isRecordThread) {
6119            // This uses hard-coded knowledge that AudioFlinger can silently down-mix and up-mix.
6120            // FIXME Abstract this out to a table.
6121            if (((supported == AUDIO_CHANNEL_IN_FRONT_BACK || supported == AUDIO_CHANNEL_IN_STEREO)
6122                    && channelMask == AUDIO_CHANNEL_IN_MONO) ||
6123                (supported == AUDIO_CHANNEL_IN_MONO && (channelMask == AUDIO_CHANNEL_IN_FRONT_BACK
6124                    || channelMask == AUDIO_CHANNEL_IN_STEREO))) {
6125                return NO_ERROR;
6126            }
6127        }
6128    }
6129    return BAD_VALUE;
6130}
6131
6132status_t AudioPolicyManager::AudioPort::checkFormat(audio_format_t format) const
6133{
6134    for (size_t i = 0; i < mFormats.size(); i ++) {
6135        if (mFormats[i] == format) {
6136            return NO_ERROR;
6137        }
6138    }
6139    return BAD_VALUE;
6140}
6141
6142
6143uint32_t AudioPolicyManager::AudioPort::pickSamplingRate() const
6144{
6145    // special case for uninitialized dynamic profile
6146    if (mSamplingRates.size() == 1 && mSamplingRates[0] == 0) {
6147        return 0;
6148    }
6149
6150    // For direct outputs, pick minimum sampling rate: this helps ensuring that the
6151    // channel count / sampling rate combination chosen will be supported by the connected
6152    // sink
6153    if ((mType == AUDIO_PORT_TYPE_MIX) && (mRole == AUDIO_PORT_ROLE_SOURCE) &&
6154            (mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD))) {
6155        uint32_t samplingRate = UINT_MAX;
6156        for (size_t i = 0; i < mSamplingRates.size(); i ++) {
6157            if ((mSamplingRates[i] < samplingRate) && (mSamplingRates[i] > 0)) {
6158                samplingRate = mSamplingRates[i];
6159            }
6160        }
6161        return (samplingRate == UINT_MAX) ? 0 : samplingRate;
6162    }
6163
6164    uint32_t samplingRate = 0;
6165    uint32_t maxRate = MAX_MIXER_SAMPLING_RATE;
6166
6167    // For mixed output and inputs, use max mixer sampling rates. Do not
6168    // limit sampling rate otherwise
6169    if (mType != AUDIO_PORT_TYPE_MIX) {
6170        maxRate = UINT_MAX;
6171    }
6172    for (size_t i = 0; i < mSamplingRates.size(); i ++) {
6173        if ((mSamplingRates[i] > samplingRate) && (mSamplingRates[i] <= maxRate)) {
6174            samplingRate = mSamplingRates[i];
6175        }
6176    }
6177    return samplingRate;
6178}
6179
6180audio_channel_mask_t AudioPolicyManager::AudioPort::pickChannelMask() const
6181{
6182    // special case for uninitialized dynamic profile
6183    if (mChannelMasks.size() == 1 && mChannelMasks[0] == 0) {
6184        return AUDIO_CHANNEL_NONE;
6185    }
6186    audio_channel_mask_t channelMask = AUDIO_CHANNEL_NONE;
6187
6188    // For direct outputs, pick minimum channel count: this helps ensuring that the
6189    // channel count / sampling rate combination chosen will be supported by the connected
6190    // sink
6191    if ((mType == AUDIO_PORT_TYPE_MIX) && (mRole == AUDIO_PORT_ROLE_SOURCE) &&
6192            (mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD))) {
6193        uint32_t channelCount = UINT_MAX;
6194        for (size_t i = 0; i < mChannelMasks.size(); i ++) {
6195            uint32_t cnlCount;
6196            if (mUseInChannelMask) {
6197                cnlCount = audio_channel_count_from_in_mask(mChannelMasks[i]);
6198            } else {
6199                cnlCount = audio_channel_count_from_out_mask(mChannelMasks[i]);
6200            }
6201            if ((cnlCount < channelCount) && (cnlCount > 0)) {
6202                channelMask = mChannelMasks[i];
6203                channelCount = cnlCount;
6204            }
6205        }
6206        return channelMask;
6207    }
6208
6209    uint32_t channelCount = 0;
6210    uint32_t maxCount = MAX_MIXER_CHANNEL_COUNT;
6211
6212    // For mixed output and inputs, use max mixer channel count. Do not
6213    // limit channel count otherwise
6214    if (mType != AUDIO_PORT_TYPE_MIX) {
6215        maxCount = UINT_MAX;
6216    }
6217    for (size_t i = 0; i < mChannelMasks.size(); i ++) {
6218        uint32_t cnlCount;
6219        if (mUseInChannelMask) {
6220            cnlCount = audio_channel_count_from_in_mask(mChannelMasks[i]);
6221        } else {
6222            cnlCount = audio_channel_count_from_out_mask(mChannelMasks[i]);
6223        }
6224        if ((cnlCount > channelCount) && (cnlCount <= maxCount)) {
6225            channelMask = mChannelMasks[i];
6226            channelCount = cnlCount;
6227        }
6228    }
6229    return channelMask;
6230}
6231
6232/* format in order of increasing preference */
6233const audio_format_t AudioPolicyManager::AudioPort::sPcmFormatCompareTable[] = {
6234        AUDIO_FORMAT_DEFAULT,
6235        AUDIO_FORMAT_PCM_16_BIT,
6236        AUDIO_FORMAT_PCM_8_24_BIT,
6237        AUDIO_FORMAT_PCM_24_BIT_PACKED,
6238        AUDIO_FORMAT_PCM_32_BIT,
6239        AUDIO_FORMAT_PCM_FLOAT,
6240};
6241
6242int AudioPolicyManager::AudioPort::compareFormats(audio_format_t format1,
6243                                                  audio_format_t format2)
6244{
6245    // NOTE: AUDIO_FORMAT_INVALID is also considered not PCM and will be compared equal to any
6246    // compressed format and better than any PCM format. This is by design of pickFormat()
6247    if (!audio_is_linear_pcm(format1)) {
6248        if (!audio_is_linear_pcm(format2)) {
6249            return 0;
6250        }
6251        return 1;
6252    }
6253    if (!audio_is_linear_pcm(format2)) {
6254        return -1;
6255    }
6256
6257    int index1 = -1, index2 = -1;
6258    for (size_t i = 0;
6259            (i < ARRAY_SIZE(sPcmFormatCompareTable)) && ((index1 == -1) || (index2 == -1));
6260            i ++) {
6261        if (sPcmFormatCompareTable[i] == format1) {
6262            index1 = i;
6263        }
6264        if (sPcmFormatCompareTable[i] == format2) {
6265            index2 = i;
6266        }
6267    }
6268    // format1 not found => index1 < 0 => format2 > format1
6269    // format2 not found => index2 < 0 => format2 < format1
6270    return index1 - index2;
6271}
6272
6273audio_format_t AudioPolicyManager::AudioPort::pickFormat() const
6274{
6275    // special case for uninitialized dynamic profile
6276    if (mFormats.size() == 1 && mFormats[0] == 0) {
6277        return AUDIO_FORMAT_DEFAULT;
6278    }
6279
6280    audio_format_t format = AUDIO_FORMAT_DEFAULT;
6281    audio_format_t bestFormat =
6282            AudioPolicyManager::AudioPort::sPcmFormatCompareTable[
6283                ARRAY_SIZE(AudioPolicyManager::AudioPort::sPcmFormatCompareTable) - 1];
6284    // For mixed output and inputs, use best mixer output format. Do not
6285    // limit format otherwise
6286    if ((mType != AUDIO_PORT_TYPE_MIX) ||
6287            ((mRole == AUDIO_PORT_ROLE_SOURCE) &&
6288             (((mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD)) != 0)))) {
6289        bestFormat = AUDIO_FORMAT_INVALID;
6290    }
6291
6292    for (size_t i = 0; i < mFormats.size(); i ++) {
6293        if ((compareFormats(mFormats[i], format) > 0) &&
6294                (compareFormats(mFormats[i], bestFormat) <= 0)) {
6295            format = mFormats[i];
6296        }
6297    }
6298    return format;
6299}
6300
6301status_t AudioPolicyManager::AudioPort::checkGain(const struct audio_gain_config *gainConfig,
6302                                                  int index) const
6303{
6304    if (index < 0 || (size_t)index >= mGains.size()) {
6305        return BAD_VALUE;
6306    }
6307    return mGains[index]->checkConfig(gainConfig);
6308}
6309
6310void AudioPolicyManager::AudioPort::dump(int fd, int spaces) const
6311{
6312    const size_t SIZE = 256;
6313    char buffer[SIZE];
6314    String8 result;
6315
6316    if (mName.size() != 0) {
6317        snprintf(buffer, SIZE, "%*s- name: %s\n", spaces, "", mName.string());
6318        result.append(buffer);
6319    }
6320
6321    if (mSamplingRates.size() != 0) {
6322        snprintf(buffer, SIZE, "%*s- sampling rates: ", spaces, "");
6323        result.append(buffer);
6324        for (size_t i = 0; i < mSamplingRates.size(); i++) {
6325            if (i == 0 && mSamplingRates[i] == 0) {
6326                snprintf(buffer, SIZE, "Dynamic");
6327            } else {
6328                snprintf(buffer, SIZE, "%d", mSamplingRates[i]);
6329            }
6330            result.append(buffer);
6331            result.append(i == (mSamplingRates.size() - 1) ? "" : ", ");
6332        }
6333        result.append("\n");
6334    }
6335
6336    if (mChannelMasks.size() != 0) {
6337        snprintf(buffer, SIZE, "%*s- channel masks: ", spaces, "");
6338        result.append(buffer);
6339        for (size_t i = 0; i < mChannelMasks.size(); i++) {
6340            ALOGV("AudioPort::dump mChannelMasks %zu %08x", i, mChannelMasks[i]);
6341
6342            if (i == 0 && mChannelMasks[i] == 0) {
6343                snprintf(buffer, SIZE, "Dynamic");
6344            } else {
6345                snprintf(buffer, SIZE, "0x%04x", mChannelMasks[i]);
6346            }
6347            result.append(buffer);
6348            result.append(i == (mChannelMasks.size() - 1) ? "" : ", ");
6349        }
6350        result.append("\n");
6351    }
6352
6353    if (mFormats.size() != 0) {
6354        snprintf(buffer, SIZE, "%*s- formats: ", spaces, "");
6355        result.append(buffer);
6356        for (size_t i = 0; i < mFormats.size(); i++) {
6357            const char *formatStr = enumToString(sFormatNameToEnumTable,
6358                                                 ARRAY_SIZE(sFormatNameToEnumTable),
6359                                                 mFormats[i]);
6360            if (i == 0 && strcmp(formatStr, "") == 0) {
6361                snprintf(buffer, SIZE, "Dynamic");
6362            } else {
6363                snprintf(buffer, SIZE, "%s", formatStr);
6364            }
6365            result.append(buffer);
6366            result.append(i == (mFormats.size() - 1) ? "" : ", ");
6367        }
6368        result.append("\n");
6369    }
6370    write(fd, result.string(), result.size());
6371    if (mGains.size() != 0) {
6372        snprintf(buffer, SIZE, "%*s- gains:\n", spaces, "");
6373        write(fd, buffer, strlen(buffer) + 1);
6374        result.append(buffer);
6375        for (size_t i = 0; i < mGains.size(); i++) {
6376            mGains[i]->dump(fd, spaces + 2, i);
6377        }
6378    }
6379}
6380
6381// --- AudioGain class implementation
6382
6383AudioPolicyManager::AudioGain::AudioGain(int index, bool useInChannelMask)
6384{
6385    mIndex = index;
6386    mUseInChannelMask = useInChannelMask;
6387    memset(&mGain, 0, sizeof(struct audio_gain));
6388}
6389
6390void AudioPolicyManager::AudioGain::getDefaultConfig(struct audio_gain_config *config)
6391{
6392    config->index = mIndex;
6393    config->mode = mGain.mode;
6394    config->channel_mask = mGain.channel_mask;
6395    if ((mGain.mode & AUDIO_GAIN_MODE_JOINT) == AUDIO_GAIN_MODE_JOINT) {
6396        config->values[0] = mGain.default_value;
6397    } else {
6398        uint32_t numValues;
6399        if (mUseInChannelMask) {
6400            numValues = audio_channel_count_from_in_mask(mGain.channel_mask);
6401        } else {
6402            numValues = audio_channel_count_from_out_mask(mGain.channel_mask);
6403        }
6404        for (size_t i = 0; i < numValues; i++) {
6405            config->values[i] = mGain.default_value;
6406        }
6407    }
6408    if ((mGain.mode & AUDIO_GAIN_MODE_RAMP) == AUDIO_GAIN_MODE_RAMP) {
6409        config->ramp_duration_ms = mGain.min_ramp_ms;
6410    }
6411}
6412
6413status_t AudioPolicyManager::AudioGain::checkConfig(const struct audio_gain_config *config)
6414{
6415    if ((config->mode & ~mGain.mode) != 0) {
6416        return BAD_VALUE;
6417    }
6418    if ((config->mode & AUDIO_GAIN_MODE_JOINT) == AUDIO_GAIN_MODE_JOINT) {
6419        if ((config->values[0] < mGain.min_value) ||
6420                    (config->values[0] > mGain.max_value)) {
6421            return BAD_VALUE;
6422        }
6423    } else {
6424        if ((config->channel_mask & ~mGain.channel_mask) != 0) {
6425            return BAD_VALUE;
6426        }
6427        uint32_t numValues;
6428        if (mUseInChannelMask) {
6429            numValues = audio_channel_count_from_in_mask(config->channel_mask);
6430        } else {
6431            numValues = audio_channel_count_from_out_mask(config->channel_mask);
6432        }
6433        for (size_t i = 0; i < numValues; i++) {
6434            if ((config->values[i] < mGain.min_value) ||
6435                    (config->values[i] > mGain.max_value)) {
6436                return BAD_VALUE;
6437            }
6438        }
6439    }
6440    if ((config->mode & AUDIO_GAIN_MODE_RAMP) == AUDIO_GAIN_MODE_RAMP) {
6441        if ((config->ramp_duration_ms < mGain.min_ramp_ms) ||
6442                    (config->ramp_duration_ms > mGain.max_ramp_ms)) {
6443            return BAD_VALUE;
6444        }
6445    }
6446    return NO_ERROR;
6447}
6448
6449void AudioPolicyManager::AudioGain::dump(int fd, int spaces, int index) const
6450{
6451    const size_t SIZE = 256;
6452    char buffer[SIZE];
6453    String8 result;
6454
6455    snprintf(buffer, SIZE, "%*sGain %d:\n", spaces, "", index+1);
6456    result.append(buffer);
6457    snprintf(buffer, SIZE, "%*s- mode: %08x\n", spaces, "", mGain.mode);
6458    result.append(buffer);
6459    snprintf(buffer, SIZE, "%*s- channel_mask: %08x\n", spaces, "", mGain.channel_mask);
6460    result.append(buffer);
6461    snprintf(buffer, SIZE, "%*s- min_value: %d mB\n", spaces, "", mGain.min_value);
6462    result.append(buffer);
6463    snprintf(buffer, SIZE, "%*s- max_value: %d mB\n", spaces, "", mGain.max_value);
6464    result.append(buffer);
6465    snprintf(buffer, SIZE, "%*s- default_value: %d mB\n", spaces, "", mGain.default_value);
6466    result.append(buffer);
6467    snprintf(buffer, SIZE, "%*s- step_value: %d mB\n", spaces, "", mGain.step_value);
6468    result.append(buffer);
6469    snprintf(buffer, SIZE, "%*s- min_ramp_ms: %d ms\n", spaces, "", mGain.min_ramp_ms);
6470    result.append(buffer);
6471    snprintf(buffer, SIZE, "%*s- max_ramp_ms: %d ms\n", spaces, "", mGain.max_ramp_ms);
6472    result.append(buffer);
6473
6474    write(fd, result.string(), result.size());
6475}
6476
6477// --- AudioPortConfig class implementation
6478
6479AudioPolicyManager::AudioPortConfig::AudioPortConfig()
6480{
6481    mSamplingRate = 0;
6482    mChannelMask = AUDIO_CHANNEL_NONE;
6483    mFormat = AUDIO_FORMAT_INVALID;
6484    mGain.index = -1;
6485}
6486
6487status_t AudioPolicyManager::AudioPortConfig::applyAudioPortConfig(
6488                                                        const struct audio_port_config *config,
6489                                                        struct audio_port_config *backupConfig)
6490{
6491    struct audio_port_config localBackupConfig;
6492    status_t status = NO_ERROR;
6493
6494    localBackupConfig.config_mask = config->config_mask;
6495    toAudioPortConfig(&localBackupConfig);
6496
6497    sp<AudioPort> audioport = getAudioPort();
6498    if (audioport == 0) {
6499        status = NO_INIT;
6500        goto exit;
6501    }
6502    if (config->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE) {
6503        status = audioport->checkExactSamplingRate(config->sample_rate);
6504        if (status != NO_ERROR) {
6505            goto exit;
6506        }
6507        mSamplingRate = config->sample_rate;
6508    }
6509    if (config->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK) {
6510        status = audioport->checkExactChannelMask(config->channel_mask);
6511        if (status != NO_ERROR) {
6512            goto exit;
6513        }
6514        mChannelMask = config->channel_mask;
6515    }
6516    if (config->config_mask & AUDIO_PORT_CONFIG_FORMAT) {
6517        status = audioport->checkFormat(config->format);
6518        if (status != NO_ERROR) {
6519            goto exit;
6520        }
6521        mFormat = config->format;
6522    }
6523    if (config->config_mask & AUDIO_PORT_CONFIG_GAIN) {
6524        status = audioport->checkGain(&config->gain, config->gain.index);
6525        if (status != NO_ERROR) {
6526            goto exit;
6527        }
6528        mGain = config->gain;
6529    }
6530
6531exit:
6532    if (status != NO_ERROR) {
6533        applyAudioPortConfig(&localBackupConfig);
6534    }
6535    if (backupConfig != NULL) {
6536        *backupConfig = localBackupConfig;
6537    }
6538    return status;
6539}
6540
6541void AudioPolicyManager::AudioPortConfig::toAudioPortConfig(
6542                                                    struct audio_port_config *dstConfig,
6543                                                    const struct audio_port_config *srcConfig) const
6544{
6545    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE) {
6546        dstConfig->sample_rate = mSamplingRate;
6547        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE)) {
6548            dstConfig->sample_rate = srcConfig->sample_rate;
6549        }
6550    } else {
6551        dstConfig->sample_rate = 0;
6552    }
6553    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK) {
6554        dstConfig->channel_mask = mChannelMask;
6555        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK)) {
6556            dstConfig->channel_mask = srcConfig->channel_mask;
6557        }
6558    } else {
6559        dstConfig->channel_mask = AUDIO_CHANNEL_NONE;
6560    }
6561    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_FORMAT) {
6562        dstConfig->format = mFormat;
6563        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_FORMAT)) {
6564            dstConfig->format = srcConfig->format;
6565        }
6566    } else {
6567        dstConfig->format = AUDIO_FORMAT_INVALID;
6568    }
6569    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_GAIN) {
6570        dstConfig->gain = mGain;
6571        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_GAIN)) {
6572            dstConfig->gain = srcConfig->gain;
6573        }
6574    } else {
6575        dstConfig->gain.index = -1;
6576    }
6577    if (dstConfig->gain.index != -1) {
6578        dstConfig->config_mask |= AUDIO_PORT_CONFIG_GAIN;
6579    } else {
6580        dstConfig->config_mask &= ~AUDIO_PORT_CONFIG_GAIN;
6581    }
6582}
6583
6584// --- IOProfile class implementation
6585
6586AudioPolicyManager::IOProfile::IOProfile(const String8& name, audio_port_role_t role,
6587                                         const sp<HwModule>& module)
6588    : AudioPort(name, AUDIO_PORT_TYPE_MIX, role, module)
6589{
6590}
6591
6592AudioPolicyManager::IOProfile::~IOProfile()
6593{
6594}
6595
6596// checks if the IO profile is compatible with specified parameters.
6597// Sampling rate, format and channel mask must be specified in order to
6598// get a valid a match
6599bool AudioPolicyManager::IOProfile::isCompatibleProfile(audio_devices_t device,
6600                                                            uint32_t samplingRate,
6601                                                            uint32_t *updatedSamplingRate,
6602                                                            audio_format_t format,
6603                                                            audio_channel_mask_t channelMask,
6604                                                            uint32_t flags) const
6605{
6606    const bool isPlaybackThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SOURCE;
6607    const bool isRecordThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SINK;
6608    ALOG_ASSERT(isPlaybackThread != isRecordThread);
6609
6610    if ((mSupportedDevices.types() & device) != device) {
6611        return false;
6612    }
6613
6614    if (samplingRate == 0) {
6615         return false;
6616    }
6617    uint32_t myUpdatedSamplingRate = samplingRate;
6618    if (isPlaybackThread && checkExactSamplingRate(samplingRate) != NO_ERROR) {
6619         return false;
6620    }
6621    if (isRecordThread && checkCompatibleSamplingRate(samplingRate, &myUpdatedSamplingRate) !=
6622            NO_ERROR) {
6623         return false;
6624    }
6625
6626    if (!audio_is_valid_format(format) || checkFormat(format) != NO_ERROR) {
6627        return false;
6628    }
6629
6630    if (isPlaybackThread && (!audio_is_output_channel(channelMask) ||
6631            checkExactChannelMask(channelMask) != NO_ERROR)) {
6632        return false;
6633    }
6634    if (isRecordThread && (!audio_is_input_channel(channelMask) ||
6635            checkCompatibleChannelMask(channelMask) != NO_ERROR)) {
6636        return false;
6637    }
6638
6639    if (isPlaybackThread && (mFlags & flags) != flags) {
6640        return false;
6641    }
6642    // The only input flag that is allowed to be different is the fast flag.
6643    // An existing fast stream is compatible with a normal track request.
6644    // An existing normal stream is compatible with a fast track request,
6645    // but the fast request will be denied by AudioFlinger and converted to normal track.
6646    if (isRecordThread && ((mFlags ^ flags) &
6647            ~AUDIO_INPUT_FLAG_FAST)) {
6648        return false;
6649    }
6650
6651    if (updatedSamplingRate != NULL) {
6652        *updatedSamplingRate = myUpdatedSamplingRate;
6653    }
6654    return true;
6655}
6656
6657void AudioPolicyManager::IOProfile::dump(int fd)
6658{
6659    const size_t SIZE = 256;
6660    char buffer[SIZE];
6661    String8 result;
6662
6663    AudioPort::dump(fd, 4);
6664
6665    snprintf(buffer, SIZE, "    - flags: 0x%04x\n", mFlags);
6666    result.append(buffer);
6667    snprintf(buffer, SIZE, "    - devices:\n");
6668    result.append(buffer);
6669    write(fd, result.string(), result.size());
6670    for (size_t i = 0; i < mSupportedDevices.size(); i++) {
6671        mSupportedDevices[i]->dump(fd, 6, i);
6672    }
6673}
6674
6675void AudioPolicyManager::IOProfile::log()
6676{
6677    const size_t SIZE = 256;
6678    char buffer[SIZE];
6679    String8 result;
6680
6681    ALOGV("    - sampling rates: ");
6682    for (size_t i = 0; i < mSamplingRates.size(); i++) {
6683        ALOGV("  %d", mSamplingRates[i]);
6684    }
6685
6686    ALOGV("    - channel masks: ");
6687    for (size_t i = 0; i < mChannelMasks.size(); i++) {
6688        ALOGV("  0x%04x", mChannelMasks[i]);
6689    }
6690
6691    ALOGV("    - formats: ");
6692    for (size_t i = 0; i < mFormats.size(); i++) {
6693        ALOGV("  0x%08x", mFormats[i]);
6694    }
6695
6696    ALOGV("    - devices: 0x%04x\n", mSupportedDevices.types());
6697    ALOGV("    - flags: 0x%04x\n", mFlags);
6698}
6699
6700
6701// --- DeviceDescriptor implementation
6702
6703
6704AudioPolicyManager::DeviceDescriptor::DeviceDescriptor(const String8& name, audio_devices_t type) :
6705                     AudioPort(name, AUDIO_PORT_TYPE_DEVICE,
6706                               audio_is_output_device(type) ? AUDIO_PORT_ROLE_SINK :
6707                                                              AUDIO_PORT_ROLE_SOURCE,
6708                             NULL),
6709                     mDeviceType(type), mAddress(""), mId(0)
6710{
6711    if (mGains.size() > 0) {
6712        mGains[0]->getDefaultConfig(&mGain);
6713    }
6714}
6715
6716bool AudioPolicyManager::DeviceDescriptor::equals(const sp<DeviceDescriptor>& other) const
6717{
6718    // Devices are considered equal if they:
6719    // - are of the same type (a device type cannot be AUDIO_DEVICE_NONE)
6720    // - have the same address or one device does not specify the address
6721    // - have the same channel mask or one device does not specify the channel mask
6722    return (mDeviceType == other->mDeviceType) &&
6723           (mAddress == "" || other->mAddress == "" || mAddress == other->mAddress) &&
6724           (mChannelMask == 0 || other->mChannelMask == 0 ||
6725                mChannelMask == other->mChannelMask);
6726}
6727
6728void AudioPolicyManager::DeviceVector::refreshTypes()
6729{
6730    mDeviceTypes = AUDIO_DEVICE_NONE;
6731    for(size_t i = 0; i < size(); i++) {
6732        mDeviceTypes |= itemAt(i)->mDeviceType;
6733    }
6734    ALOGV("DeviceVector::refreshTypes() mDeviceTypes %08x", mDeviceTypes);
6735}
6736
6737ssize_t AudioPolicyManager::DeviceVector::indexOf(const sp<DeviceDescriptor>& item) const
6738{
6739    for(size_t i = 0; i < size(); i++) {
6740        if (item->equals(itemAt(i))) {
6741            return i;
6742        }
6743    }
6744    return -1;
6745}
6746
6747ssize_t AudioPolicyManager::DeviceVector::add(const sp<DeviceDescriptor>& item)
6748{
6749    ssize_t ret = indexOf(item);
6750
6751    if (ret < 0) {
6752        ret = SortedVector::add(item);
6753        if (ret >= 0) {
6754            refreshTypes();
6755        }
6756    } else {
6757        ALOGW("DeviceVector::add device %08x already in", item->mDeviceType);
6758        ret = -1;
6759    }
6760    return ret;
6761}
6762
6763ssize_t AudioPolicyManager::DeviceVector::remove(const sp<DeviceDescriptor>& item)
6764{
6765    size_t i;
6766    ssize_t ret = indexOf(item);
6767
6768    if (ret < 0) {
6769        ALOGW("DeviceVector::remove device %08x not in", item->mDeviceType);
6770    } else {
6771        ret = SortedVector::removeAt(ret);
6772        if (ret >= 0) {
6773            refreshTypes();
6774        }
6775    }
6776    return ret;
6777}
6778
6779void AudioPolicyManager::DeviceVector::loadDevicesFromType(audio_devices_t types)
6780{
6781    DeviceVector deviceList;
6782
6783    uint32_t role_bit = AUDIO_DEVICE_BIT_IN & types;
6784    types &= ~role_bit;
6785
6786    while (types) {
6787        uint32_t i = 31 - __builtin_clz(types);
6788        uint32_t type = 1 << i;
6789        types &= ~type;
6790        add(new DeviceDescriptor(String8(""), type | role_bit));
6791    }
6792}
6793
6794void AudioPolicyManager::DeviceVector::loadDevicesFromName(char *name,
6795                                                           const DeviceVector& declaredDevices)
6796{
6797    char *devName = strtok(name, "|");
6798    while (devName != NULL) {
6799        if (strlen(devName) != 0) {
6800            audio_devices_t type = stringToEnum(sDeviceNameToEnumTable,
6801                                 ARRAY_SIZE(sDeviceNameToEnumTable),
6802                                 devName);
6803            if (type != AUDIO_DEVICE_NONE) {
6804                add(new DeviceDescriptor(String8(""), type));
6805            } else {
6806                sp<DeviceDescriptor> deviceDesc =
6807                        declaredDevices.getDeviceFromName(String8(devName));
6808                if (deviceDesc != 0) {
6809                    add(deviceDesc);
6810                }
6811            }
6812         }
6813        devName = strtok(NULL, "|");
6814     }
6815}
6816
6817sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDevice(
6818                                                        audio_devices_t type, String8 address) const
6819{
6820    sp<DeviceDescriptor> device;
6821    for (size_t i = 0; i < size(); i++) {
6822        if (itemAt(i)->mDeviceType == type) {
6823            device = itemAt(i);
6824            if (itemAt(i)->mAddress = address) {
6825                break;
6826            }
6827        }
6828    }
6829    ALOGV("DeviceVector::getDevice() for type %d address %s found %p",
6830          type, address.string(), device.get());
6831    return device;
6832}
6833
6834sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDeviceFromId(
6835                                                                    audio_port_handle_t id) const
6836{
6837    sp<DeviceDescriptor> device;
6838    for (size_t i = 0; i < size(); i++) {
6839        ALOGV("DeviceVector::getDeviceFromId(%d) itemAt(%zu)->mId %d", id, i, itemAt(i)->mId);
6840        if (itemAt(i)->mId == id) {
6841            device = itemAt(i);
6842            break;
6843        }
6844    }
6845    return device;
6846}
6847
6848AudioPolicyManager::DeviceVector AudioPolicyManager::DeviceVector::getDevicesFromType(
6849                                                                        audio_devices_t type) const
6850{
6851    DeviceVector devices;
6852    for (size_t i = 0; (i < size()) && (type != AUDIO_DEVICE_NONE); i++) {
6853        if (itemAt(i)->mDeviceType & type & ~AUDIO_DEVICE_BIT_IN) {
6854            devices.add(itemAt(i));
6855            type &= ~itemAt(i)->mDeviceType;
6856            ALOGV("DeviceVector::getDevicesFromType() for type %x found %p",
6857                  itemAt(i)->mDeviceType, itemAt(i).get());
6858        }
6859    }
6860    return devices;
6861}
6862
6863AudioPolicyManager::DeviceVector AudioPolicyManager::DeviceVector::getDevicesFromTypeAddr(
6864        audio_devices_t type, String8 address) const
6865{
6866    DeviceVector devices;
6867    //ALOGV("   looking for device=%x, addr=%s", type, address.string());
6868    for (size_t i = 0; i < size(); i++) {
6869        //ALOGV("     at i=%d: device=%x, addr=%s",
6870        //        i, itemAt(i)->mDeviceType, itemAt(i)->mAddress.string());
6871        if (itemAt(i)->mDeviceType == type) {
6872            if (itemAt(i)->mAddress == address) {
6873                //ALOGV("      found matching address %s", address.string());
6874                devices.add(itemAt(i));
6875            }
6876        }
6877    }
6878    return devices;
6879}
6880
6881sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDeviceFromName(
6882        const String8& name) const
6883{
6884    sp<DeviceDescriptor> device;
6885    for (size_t i = 0; i < size(); i++) {
6886        if (itemAt(i)->mName == name) {
6887            device = itemAt(i);
6888            break;
6889        }
6890    }
6891    return device;
6892}
6893
6894void AudioPolicyManager::DeviceDescriptor::toAudioPortConfig(
6895                                                    struct audio_port_config *dstConfig,
6896                                                    const struct audio_port_config *srcConfig) const
6897{
6898    dstConfig->config_mask = AUDIO_PORT_CONFIG_CHANNEL_MASK|AUDIO_PORT_CONFIG_GAIN;
6899    if (srcConfig != NULL) {
6900        dstConfig->config_mask |= srcConfig->config_mask;
6901    }
6902
6903    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
6904
6905    dstConfig->id = mId;
6906    dstConfig->role = audio_is_output_device(mDeviceType) ?
6907                        AUDIO_PORT_ROLE_SINK : AUDIO_PORT_ROLE_SOURCE;
6908    dstConfig->type = AUDIO_PORT_TYPE_DEVICE;
6909    dstConfig->ext.device.type = mDeviceType;
6910    dstConfig->ext.device.hw_module = mModule->mHandle;
6911    strncpy(dstConfig->ext.device.address, mAddress.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN);
6912}
6913
6914void AudioPolicyManager::DeviceDescriptor::toAudioPort(struct audio_port *port) const
6915{
6916    ALOGV("DeviceDescriptor::toAudioPort() handle %d type %x", mId, mDeviceType);
6917    AudioPort::toAudioPort(port);
6918    port->id = mId;
6919    toAudioPortConfig(&port->active_config);
6920    port->ext.device.type = mDeviceType;
6921    port->ext.device.hw_module = mModule->mHandle;
6922    strncpy(port->ext.device.address, mAddress.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN);
6923}
6924
6925status_t AudioPolicyManager::DeviceDescriptor::dump(int fd, int spaces, int index) const
6926{
6927    const size_t SIZE = 256;
6928    char buffer[SIZE];
6929    String8 result;
6930
6931    snprintf(buffer, SIZE, "%*sDevice %d:\n", spaces, "", index+1);
6932    result.append(buffer);
6933    if (mId != 0) {
6934        snprintf(buffer, SIZE, "%*s- id: %2d\n", spaces, "", mId);
6935        result.append(buffer);
6936    }
6937    snprintf(buffer, SIZE, "%*s- type: %-48s\n", spaces, "",
6938                                              enumToString(sDeviceNameToEnumTable,
6939                                                           ARRAY_SIZE(sDeviceNameToEnumTable),
6940                                                           mDeviceType));
6941    result.append(buffer);
6942    if (mAddress.size() != 0) {
6943        snprintf(buffer, SIZE, "%*s- address: %-32s\n", spaces, "", mAddress.string());
6944        result.append(buffer);
6945    }
6946    write(fd, result.string(), result.size());
6947    AudioPort::dump(fd, spaces);
6948
6949    return NO_ERROR;
6950}
6951
6952status_t AudioPolicyManager::AudioPatch::dump(int fd, int spaces, int index) const
6953{
6954    const size_t SIZE = 256;
6955    char buffer[SIZE];
6956    String8 result;
6957
6958
6959    snprintf(buffer, SIZE, "%*sAudio patch %d:\n", spaces, "", index+1);
6960    result.append(buffer);
6961    snprintf(buffer, SIZE, "%*s- handle: %2d\n", spaces, "", mHandle);
6962    result.append(buffer);
6963    snprintf(buffer, SIZE, "%*s- audio flinger handle: %2d\n", spaces, "", mAfPatchHandle);
6964    result.append(buffer);
6965    snprintf(buffer, SIZE, "%*s- owner uid: %2d\n", spaces, "", mUid);
6966    result.append(buffer);
6967    snprintf(buffer, SIZE, "%*s- %d sources:\n", spaces, "", mPatch.num_sources);
6968    result.append(buffer);
6969    for (size_t i = 0; i < mPatch.num_sources; i++) {
6970        if (mPatch.sources[i].type == AUDIO_PORT_TYPE_DEVICE) {
6971            snprintf(buffer, SIZE, "%*s- Device ID %d %s\n", spaces + 2, "",
6972                     mPatch.sources[i].id, enumToString(sDeviceNameToEnumTable,
6973                                                        ARRAY_SIZE(sDeviceNameToEnumTable),
6974                                                        mPatch.sources[i].ext.device.type));
6975        } else {
6976            snprintf(buffer, SIZE, "%*s- Mix ID %d I/O handle %d\n", spaces + 2, "",
6977                     mPatch.sources[i].id, mPatch.sources[i].ext.mix.handle);
6978        }
6979        result.append(buffer);
6980    }
6981    snprintf(buffer, SIZE, "%*s- %d sinks:\n", spaces, "", mPatch.num_sinks);
6982    result.append(buffer);
6983    for (size_t i = 0; i < mPatch.num_sinks; i++) {
6984        if (mPatch.sinks[i].type == AUDIO_PORT_TYPE_DEVICE) {
6985            snprintf(buffer, SIZE, "%*s- Device ID %d %s\n", spaces + 2, "",
6986                     mPatch.sinks[i].id, enumToString(sDeviceNameToEnumTable,
6987                                                        ARRAY_SIZE(sDeviceNameToEnumTable),
6988                                                        mPatch.sinks[i].ext.device.type));
6989        } else {
6990            snprintf(buffer, SIZE, "%*s- Mix ID %d I/O handle %d\n", spaces + 2, "",
6991                     mPatch.sinks[i].id, mPatch.sinks[i].ext.mix.handle);
6992        }
6993        result.append(buffer);
6994    }
6995
6996    write(fd, result.string(), result.size());
6997    return NO_ERROR;
6998}
6999
7000// --- audio_policy.conf file parsing
7001
7002uint32_t AudioPolicyManager::parseOutputFlagNames(char *name)
7003{
7004    uint32_t flag = 0;
7005
7006    // it is OK to cast name to non const here as we are not going to use it after
7007    // strtok() modifies it
7008    char *flagName = strtok(name, "|");
7009    while (flagName != NULL) {
7010        if (strlen(flagName) != 0) {
7011            flag |= stringToEnum(sOutputFlagNameToEnumTable,
7012                               ARRAY_SIZE(sOutputFlagNameToEnumTable),
7013                               flagName);
7014        }
7015        flagName = strtok(NULL, "|");
7016    }
7017    //force direct flag if offload flag is set: offloading implies a direct output stream
7018    // and all common behaviors are driven by checking only the direct flag
7019    // this should normally be set appropriately in the policy configuration file
7020    if ((flag & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
7021        flag |= AUDIO_OUTPUT_FLAG_DIRECT;
7022    }
7023
7024    return flag;
7025}
7026
7027uint32_t AudioPolicyManager::parseInputFlagNames(char *name)
7028{
7029    uint32_t flag = 0;
7030
7031    // it is OK to cast name to non const here as we are not going to use it after
7032    // strtok() modifies it
7033    char *flagName = strtok(name, "|");
7034    while (flagName != NULL) {
7035        if (strlen(flagName) != 0) {
7036            flag |= stringToEnum(sInputFlagNameToEnumTable,
7037                               ARRAY_SIZE(sInputFlagNameToEnumTable),
7038                               flagName);
7039        }
7040        flagName = strtok(NULL, "|");
7041    }
7042    return flag;
7043}
7044
7045audio_devices_t AudioPolicyManager::parseDeviceNames(char *name)
7046{
7047    uint32_t device = 0;
7048
7049    char *devName = strtok(name, "|");
7050    while (devName != NULL) {
7051        if (strlen(devName) != 0) {
7052            device |= stringToEnum(sDeviceNameToEnumTable,
7053                                 ARRAY_SIZE(sDeviceNameToEnumTable),
7054                                 devName);
7055         }
7056        devName = strtok(NULL, "|");
7057     }
7058    return device;
7059}
7060
7061void AudioPolicyManager::loadHwModule(cnode *root)
7062{
7063    status_t status = NAME_NOT_FOUND;
7064    cnode *node;
7065    sp<HwModule> module = new HwModule(root->name);
7066
7067    node = config_find(root, DEVICES_TAG);
7068    if (node != NULL) {
7069        node = node->first_child;
7070        while (node) {
7071            ALOGV("loadHwModule() loading device %s", node->name);
7072            status_t tmpStatus = module->loadDevice(node);
7073            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
7074                status = tmpStatus;
7075            }
7076            node = node->next;
7077        }
7078    }
7079    node = config_find(root, OUTPUTS_TAG);
7080    if (node != NULL) {
7081        node = node->first_child;
7082        while (node) {
7083            ALOGV("loadHwModule() loading output %s", node->name);
7084            status_t tmpStatus = module->loadOutput(node);
7085            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
7086                status = tmpStatus;
7087            }
7088            node = node->next;
7089        }
7090    }
7091    node = config_find(root, INPUTS_TAG);
7092    if (node != NULL) {
7093        node = node->first_child;
7094        while (node) {
7095            ALOGV("loadHwModule() loading input %s", node->name);
7096            status_t tmpStatus = module->loadInput(node);
7097            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
7098                status = tmpStatus;
7099            }
7100            node = node->next;
7101        }
7102    }
7103    loadGlobalConfig(root, module);
7104
7105    if (status == NO_ERROR) {
7106        mHwModules.add(module);
7107    }
7108}
7109
7110void AudioPolicyManager::loadHwModules(cnode *root)
7111{
7112    cnode *node = config_find(root, AUDIO_HW_MODULE_TAG);
7113    if (node == NULL) {
7114        return;
7115    }
7116
7117    node = node->first_child;
7118    while (node) {
7119        ALOGV("loadHwModules() loading module %s", node->name);
7120        loadHwModule(node);
7121        node = node->next;
7122    }
7123}
7124
7125void AudioPolicyManager::loadGlobalConfig(cnode *root, const sp<HwModule>& module)
7126{
7127    cnode *node = config_find(root, GLOBAL_CONFIG_TAG);
7128
7129    if (node == NULL) {
7130        return;
7131    }
7132    DeviceVector declaredDevices;
7133    if (module != NULL) {
7134        declaredDevices = module->mDeclaredDevices;
7135    }
7136
7137    node = node->first_child;
7138    while (node) {
7139        if (strcmp(ATTACHED_OUTPUT_DEVICES_TAG, node->name) == 0) {
7140            mAvailableOutputDevices.loadDevicesFromName((char *)node->value,
7141                                                        declaredDevices);
7142            ALOGV("loadGlobalConfig() Attached Output Devices %08x",
7143                  mAvailableOutputDevices.types());
7144        } else if (strcmp(DEFAULT_OUTPUT_DEVICE_TAG, node->name) == 0) {
7145            audio_devices_t device = (audio_devices_t)stringToEnum(sDeviceNameToEnumTable,
7146                                              ARRAY_SIZE(sDeviceNameToEnumTable),
7147                                              (char *)node->value);
7148            if (device != AUDIO_DEVICE_NONE) {
7149                mDefaultOutputDevice = new DeviceDescriptor(String8(""), device);
7150            } else {
7151                ALOGW("loadGlobalConfig() default device not specified");
7152            }
7153            ALOGV("loadGlobalConfig() mDefaultOutputDevice %08x", mDefaultOutputDevice->mDeviceType);
7154        } else if (strcmp(ATTACHED_INPUT_DEVICES_TAG, node->name) == 0) {
7155            mAvailableInputDevices.loadDevicesFromName((char *)node->value,
7156                                                       declaredDevices);
7157            ALOGV("loadGlobalConfig() Available InputDevices %08x", mAvailableInputDevices.types());
7158        } else if (strcmp(SPEAKER_DRC_ENABLED_TAG, node->name) == 0) {
7159            mSpeakerDrcEnabled = stringToBool((char *)node->value);
7160            ALOGV("loadGlobalConfig() mSpeakerDrcEnabled = %d", mSpeakerDrcEnabled);
7161        } else if (strcmp(AUDIO_HAL_VERSION_TAG, node->name) == 0) {
7162            uint32_t major, minor;
7163            sscanf((char *)node->value, "%u.%u", &major, &minor);
7164            module->mHalVersion = HARDWARE_DEVICE_API_VERSION(major, minor);
7165            ALOGV("loadGlobalConfig() mHalVersion = %04x major %u minor %u",
7166                  module->mHalVersion, major, minor);
7167        }
7168        node = node->next;
7169    }
7170}
7171
7172status_t AudioPolicyManager::loadAudioPolicyConfig(const char *path)
7173{
7174    cnode *root;
7175    char *data;
7176
7177    data = (char *)load_file(path, NULL);
7178    if (data == NULL) {
7179        return -ENODEV;
7180    }
7181    root = config_node("", "");
7182    config_load(root, data);
7183
7184    loadHwModules(root);
7185    // legacy audio_policy.conf files have one global_configuration section
7186    loadGlobalConfig(root, getModuleFromName(AUDIO_HARDWARE_MODULE_ID_PRIMARY));
7187    config_free(root);
7188    free(root);
7189    free(data);
7190
7191    ALOGI("loadAudioPolicyConfig() loaded %s\n", path);
7192
7193    return NO_ERROR;
7194}
7195
7196void AudioPolicyManager::defaultAudioPolicyConfig(void)
7197{
7198    sp<HwModule> module;
7199    sp<IOProfile> profile;
7200    sp<DeviceDescriptor> defaultInputDevice = new DeviceDescriptor(String8(""),
7201                                                                   AUDIO_DEVICE_IN_BUILTIN_MIC);
7202    mAvailableOutputDevices.add(mDefaultOutputDevice);
7203    mAvailableInputDevices.add(defaultInputDevice);
7204
7205    module = new HwModule("primary");
7206
7207    profile = new IOProfile(String8("primary"), AUDIO_PORT_ROLE_SOURCE, module);
7208    profile->mSamplingRates.add(44100);
7209    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
7210    profile->mChannelMasks.add(AUDIO_CHANNEL_OUT_STEREO);
7211    profile->mSupportedDevices.add(mDefaultOutputDevice);
7212    profile->mFlags = AUDIO_OUTPUT_FLAG_PRIMARY;
7213    module->mOutputProfiles.add(profile);
7214
7215    profile = new IOProfile(String8("primary"), AUDIO_PORT_ROLE_SINK, module);
7216    profile->mSamplingRates.add(8000);
7217    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
7218    profile->mChannelMasks.add(AUDIO_CHANNEL_IN_MONO);
7219    profile->mSupportedDevices.add(defaultInputDevice);
7220    module->mInputProfiles.add(profile);
7221
7222    mHwModules.add(module);
7223}
7224
7225audio_stream_type_t AudioPolicyManager::streamTypefromAttributesInt(const audio_attributes_t *attr)
7226{
7227    // flags to stream type mapping
7228    if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
7229        return AUDIO_STREAM_ENFORCED_AUDIBLE;
7230    }
7231    if ((attr->flags & AUDIO_FLAG_SCO) == AUDIO_FLAG_SCO) {
7232        return AUDIO_STREAM_BLUETOOTH_SCO;
7233    }
7234
7235    // usage to stream type mapping
7236    switch (attr->usage) {
7237    case AUDIO_USAGE_MEDIA:
7238    case AUDIO_USAGE_GAME:
7239    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
7240    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
7241        return AUDIO_STREAM_MUSIC;
7242    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
7243        return AUDIO_STREAM_SYSTEM;
7244    case AUDIO_USAGE_VOICE_COMMUNICATION:
7245        return AUDIO_STREAM_VOICE_CALL;
7246
7247    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
7248        return AUDIO_STREAM_DTMF;
7249
7250    case AUDIO_USAGE_ALARM:
7251        return AUDIO_STREAM_ALARM;
7252    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
7253        return AUDIO_STREAM_RING;
7254
7255    case AUDIO_USAGE_NOTIFICATION:
7256    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
7257    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
7258    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
7259    case AUDIO_USAGE_NOTIFICATION_EVENT:
7260        return AUDIO_STREAM_NOTIFICATION;
7261
7262    case AUDIO_USAGE_UNKNOWN:
7263    default:
7264        return AUDIO_STREAM_MUSIC;
7265    }
7266}
7267}; // namespace android
7268