AudioRecorder_to_android.cpp revision ac28eca1df49f581d952ffbda5d3019f7e3b7be6
1/* 2 * Copyright (C) 2010 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 18#include "sles_allinclusive.h" 19#include "android_prompts.h" 20 21#include <utils/String16.h> 22 23#include <system/audio.h> 24 25// use this flag to dump all recorded audio into a file 26//#define MONITOR_RECORDING 27#ifdef MONITOR_RECORDING 28#define MONITOR_TARGET "/sdcard/monitor.raw" 29#include <stdio.h> 30static FILE* gMonitorFp = NULL; 31#endif 32 33 34#define KEY_RECORDING_SOURCE_PARAMSIZE sizeof(SLuint32) 35#define KEY_RECORDING_PRESET_PARAMSIZE sizeof(SLuint32) 36 37//----------------------------------------------------------------------------- 38// Internal utility functions 39//---------------------------- 40 41SLresult audioRecorder_setPreset(CAudioRecorder* ar, SLuint32 recordPreset) { 42 SLresult result = SL_RESULT_SUCCESS; 43 44 audio_source_t newRecordSource = AUDIO_SOURCE_DEFAULT; 45 switch (recordPreset) { 46 case SL_ANDROID_RECORDING_PRESET_GENERIC: 47 newRecordSource = AUDIO_SOURCE_DEFAULT; 48 break; 49 case SL_ANDROID_RECORDING_PRESET_CAMCORDER: 50 newRecordSource = AUDIO_SOURCE_CAMCORDER; 51 break; 52 case SL_ANDROID_RECORDING_PRESET_VOICE_RECOGNITION: 53 newRecordSource = AUDIO_SOURCE_VOICE_RECOGNITION; 54 break; 55 case SL_ANDROID_RECORDING_PRESET_VOICE_COMMUNICATION: 56 newRecordSource = AUDIO_SOURCE_VOICE_COMMUNICATION; 57 break; 58 case SL_ANDROID_RECORDING_PRESET_NONE: 59 // it is an error to set preset "none" 60 default: 61 SL_LOGE(ERROR_RECORDERPRESET_SET_UNKNOWN_PRESET); 62 result = SL_RESULT_PARAMETER_INVALID; 63 } 64 65 // recording preset needs to be set before the object is realized 66 // (ap->mAudioRecord is supposed to be 0 until then) 67 if (SL_OBJECT_STATE_UNREALIZED != ar->mObject.mState) { 68 SL_LOGE(ERROR_RECORDERPRESET_REALIZED); 69 result = SL_RESULT_PRECONDITIONS_VIOLATED; 70 } else { 71 ar->mRecordSource = newRecordSource; 72 } 73 74 return result; 75} 76 77 78SLresult audioRecorder_getPreset(CAudioRecorder* ar, SLuint32* pPreset) { 79 SLresult result = SL_RESULT_SUCCESS; 80 81 switch (ar->mRecordSource) { 82 case AUDIO_SOURCE_DEFAULT: 83 case AUDIO_SOURCE_MIC: 84 *pPreset = SL_ANDROID_RECORDING_PRESET_GENERIC; 85 break; 86 case AUDIO_SOURCE_VOICE_UPLINK: 87 case AUDIO_SOURCE_VOICE_DOWNLINK: 88 case AUDIO_SOURCE_VOICE_CALL: 89 *pPreset = SL_ANDROID_RECORDING_PRESET_NONE; 90 break; 91 case AUDIO_SOURCE_VOICE_RECOGNITION: 92 *pPreset = SL_ANDROID_RECORDING_PRESET_VOICE_RECOGNITION; 93 break; 94 case AUDIO_SOURCE_CAMCORDER: 95 *pPreset = SL_ANDROID_RECORDING_PRESET_CAMCORDER; 96 break; 97 case AUDIO_SOURCE_VOICE_COMMUNICATION: 98 *pPreset = SL_ANDROID_RECORDING_PRESET_VOICE_COMMUNICATION; 99 break; 100 default: 101 *pPreset = SL_ANDROID_RECORDING_PRESET_NONE; 102 result = SL_RESULT_INTERNAL_ERROR; 103 break; 104 } 105 106 return result; 107} 108 109 110void audioRecorder_handleNewPos_lockRecord(CAudioRecorder* ar) { 111 //SL_LOGV("received event EVENT_NEW_POS from AudioRecord"); 112 slRecordCallback callback = NULL; 113 void* callbackPContext = NULL; 114 115 interface_lock_shared(&ar->mRecord); 116 callback = ar->mRecord.mCallback; 117 callbackPContext = ar->mRecord.mContext; 118 interface_unlock_shared(&ar->mRecord); 119 120 if (NULL != callback) { 121 // getting this event implies SL_RECORDEVENT_HEADATNEWPOS was set in the event mask 122 (*callback)(&ar->mRecord.mItf, callbackPContext, SL_RECORDEVENT_HEADATNEWPOS); 123 } 124} 125 126 127void audioRecorder_handleMarker_lockRecord(CAudioRecorder* ar) { 128 //SL_LOGV("received event EVENT_MARKER from AudioRecord"); 129 slRecordCallback callback = NULL; 130 void* callbackPContext = NULL; 131 132 interface_lock_shared(&ar->mRecord); 133 callback = ar->mRecord.mCallback; 134 callbackPContext = ar->mRecord.mContext; 135 interface_unlock_shared(&ar->mRecord); 136 137 if (NULL != callback) { 138 // getting this event implies SL_RECORDEVENT_HEADATMARKER was set in the event mask 139 (*callback)(&ar->mRecord.mItf, callbackPContext, SL_RECORDEVENT_HEADATMARKER); 140 } 141} 142 143 144void audioRecorder_handleOverrun_lockRecord(CAudioRecorder* ar) { 145 //SL_LOGV("received event EVENT_OVERRUN from AudioRecord"); 146 slRecordCallback callback = NULL; 147 void* callbackPContext = NULL; 148 149 interface_lock_shared(&ar->mRecord); 150 if (ar->mRecord.mCallbackEventsMask & SL_RECORDEVENT_HEADSTALLED) { 151 callback = ar->mRecord.mCallback; 152 callbackPContext = ar->mRecord.mContext; 153 } 154 interface_unlock_shared(&ar->mRecord); 155 156 if (NULL != callback) { 157 (*callback)(&ar->mRecord.mItf, callbackPContext, SL_RECORDEVENT_HEADSTALLED); 158 } 159} 160 161//----------------------------------------------------------------------------- 162SLresult android_audioRecorder_checkSourceSinkSupport(CAudioRecorder* ar) { 163 164 const SLDataSource *pAudioSrc = &ar->mDataSource.u.mSource; 165 const SLDataSink *pAudioSnk = &ar->mDataSink.u.mSink; 166 167 // Sink check: 168 // only buffer queue sinks are supported, regardless of the data source 169 if (SL_DATALOCATOR_ANDROIDSIMPLEBUFFERQUEUE != *(SLuint32 *)pAudioSnk->pLocator) { 170 SL_LOGE(ERROR_RECORDER_SINK_MUST_BE_ANDROIDSIMPLEBUFFERQUEUE); 171 return SL_RESULT_PARAMETER_INVALID; 172 } else { 173 // only PCM buffer queues are supported 174 SLuint32 formatType = *(SLuint32 *)pAudioSnk->pFormat; 175 if (SL_DATAFORMAT_PCM == formatType) { 176 SLDataFormat_PCM *df_pcm = (SLDataFormat_PCM *)ar->mDataSink.u.mSink.pFormat; 177 ar->mSampleRateMilliHz = df_pcm->samplesPerSec; 178 ar->mNumChannels = df_pcm->numChannels; 179 SL_LOGV("AudioRecorder requested sample rate = %u mHz, %u channel(s)", 180 ar->mSampleRateMilliHz, ar->mNumChannels); 181 } 182 else { 183 SL_LOGE(ERROR_RECORDER_SINK_FORMAT_MUST_BE_PCM); 184 return SL_RESULT_PARAMETER_INVALID; 185 } 186 } 187 188 // Source check: 189 // only input device sources are supported 190 // check it's an IO device 191 if (SL_DATALOCATOR_IODEVICE != *(SLuint32 *)pAudioSrc->pLocator) { 192 SL_LOGE(ERROR_RECORDER_SOURCE_MUST_BE_IODEVICE); 193 return SL_RESULT_PARAMETER_INVALID; 194 } else { 195 196 // check it's an input device 197 SLDataLocator_IODevice *dl_iod = (SLDataLocator_IODevice *) pAudioSrc->pLocator; 198 if (SL_IODEVICE_AUDIOINPUT != dl_iod->deviceType) { 199 SL_LOGE(ERROR_RECORDER_IODEVICE_MUST_BE_AUDIOINPUT); 200 return SL_RESULT_PARAMETER_INVALID; 201 } 202 203 // check it's the default input device, others aren't supported here 204 if (SL_DEFAULTDEVICEID_AUDIOINPUT != dl_iod->deviceID) { 205 SL_LOGE(ERROR_RECORDER_INPUT_ID_MUST_BE_DEFAULT); 206 return SL_RESULT_PARAMETER_INVALID; 207 } 208 } 209 210 return SL_RESULT_SUCCESS; 211} 212//----------------------------------------------------------------------------- 213static void audioRecorder_callback(int event, void* user, void *info) { 214 //SL_LOGV("audioRecorder_callback(%d, %p, %p) entering", event, user, info); 215 216 CAudioRecorder *ar = (CAudioRecorder *)user; 217 218 if (!android::CallbackProtector::enterCbIfOk(ar->mCallbackProtector)) { 219 // it is not safe to enter the callback (the track is about to go away) 220 return; 221 } 222 223 void * callbackPContext = NULL; 224 225 switch (event) { 226 case android::AudioRecord::EVENT_MORE_DATA: { 227 slBufferQueueCallback callback = NULL; 228 android::AudioRecord::Buffer* pBuff = (android::AudioRecord::Buffer*)info; 229 230 // push data to the buffer queue 231 interface_lock_exclusive(&ar->mBufferQueue); 232 233 if (ar->mBufferQueue.mState.count != 0) { 234 assert(ar->mBufferQueue.mFront != ar->mBufferQueue.mRear); 235 236 BufferHeader *oldFront = ar->mBufferQueue.mFront; 237 BufferHeader *newFront = &oldFront[1]; 238 239 // FIXME handle 8bit based on buffer format 240 short *pDest = (short*)((char *)oldFront->mBuffer + ar->mBufferQueue.mSizeConsumed); 241 if (ar->mBufferQueue.mSizeConsumed + pBuff->size < oldFront->mSize) { 242 // can't consume the whole or rest of the buffer in one shot 243 ar->mBufferQueue.mSizeConsumed += pBuff->size; 244 // leave pBuff->size untouched 245 // consume data 246 // FIXME can we avoid holding the lock during the copy? 247 memcpy (pDest, pBuff->i16, pBuff->size); 248#ifdef MONITOR_RECORDING 249 if (NULL != gMonitorFp) { fwrite(pBuff->i16, pBuff->size, 1, gMonitorFp); } 250#endif 251 } else { 252 // finish pushing the buffer or push the buffer in one shot 253 pBuff->size = oldFront->mSize - ar->mBufferQueue.mSizeConsumed; 254 ar->mBufferQueue.mSizeConsumed = 0; 255 if (newFront == &ar->mBufferQueue.mArray[ar->mBufferQueue.mNumBuffers + 1]) { 256 newFront = ar->mBufferQueue.mArray; 257 } 258 ar->mBufferQueue.mFront = newFront; 259 260 ar->mBufferQueue.mState.count--; 261 ar->mBufferQueue.mState.playIndex++; 262 // consume data 263 // FIXME can we avoid holding the lock during the copy? 264 memcpy (pDest, pBuff->i16, pBuff->size); 265#ifdef MONITOR_RECORDING 266 if (NULL != gMonitorFp) { fwrite(pBuff->i16, pBuff->size, 1, gMonitorFp); } 267#endif 268 // data has been copied to the buffer, and the buffer queue state has been updated 269 // we will notify the client if applicable 270 callback = ar->mBufferQueue.mCallback; 271 // save callback data 272 callbackPContext = ar->mBufferQueue.mContext; 273 } 274 } else { 275 // no destination to push the data 276 pBuff->size = 0; 277 } 278 279 interface_unlock_exclusive(&ar->mBufferQueue); 280 // notify client 281 if (NULL != callback) { 282 (*callback)(&ar->mBufferQueue.mItf, callbackPContext); 283 } 284 } 285 break; 286 287 case android::AudioRecord::EVENT_OVERRUN: 288 audioRecorder_handleOverrun_lockRecord(ar); 289 break; 290 291 case android::AudioRecord::EVENT_MARKER: 292 audioRecorder_handleMarker_lockRecord(ar); 293 break; 294 295 case android::AudioRecord::EVENT_NEW_POS: 296 audioRecorder_handleNewPos_lockRecord(ar); 297 break; 298 299 } 300 301 ar->mCallbackProtector->exitCb(); 302} 303 304 305//----------------------------------------------------------------------------- 306SLresult android_audioRecorder_create(CAudioRecorder* ar) { 307 SL_LOGV("android_audioRecorder_create(%p) entering", ar); 308 309 const SLDataSource *pAudioSrc = &ar->mDataSource.u.mSource; 310 const SLDataSink *pAudioSnk = &ar->mDataSink.u.mSink; 311 SLresult result = SL_RESULT_SUCCESS; 312 313 const SLuint32 sourceLocatorType = *(SLuint32 *)pAudioSrc->pLocator; 314 const SLuint32 sinkLocatorType = *(SLuint32 *)pAudioSnk->pLocator; 315 316 // the following platform-independent fields have been initialized in CreateAudioRecorder() 317 // ar->mNumChannels 318 // ar->mSampleRateMilliHz 319 320 if ((SL_DATALOCATOR_IODEVICE == sourceLocatorType) && 321 (SL_DATALOCATOR_ANDROIDSIMPLEBUFFERQUEUE == sinkLocatorType)) { 322 // microphone to simple buffer queue 323 ar->mAndroidObjType = AUDIORECORDER_FROM_MIC_TO_PCM_BUFFERQUEUE; 324 ar->mAudioRecord.clear(); 325 ar->mCallbackProtector = new android::CallbackProtector(); 326 ar->mRecordSource = AUDIO_SOURCE_DEFAULT; 327 } else { 328 result = SL_RESULT_CONTENT_UNSUPPORTED; 329 } 330 331 return result; 332} 333 334 335//----------------------------------------------------------------------------- 336SLresult android_audioRecorder_setConfig(CAudioRecorder* ar, const SLchar *configKey, 337 const void *pConfigValue, SLuint32 valueSize) { 338 339 SLresult result; 340 341 assert(NULL != ar && NULL != configKey && NULL != pConfigValue); 342 if (strcmp((const char*)configKey, (const char*)SL_ANDROID_KEY_RECORDING_PRESET) == 0) { 343 344 // recording preset 345 if (KEY_RECORDING_PRESET_PARAMSIZE > valueSize) { 346 SL_LOGE(ERROR_CONFIG_VALUESIZE_TOO_LOW); 347 result = SL_RESULT_BUFFER_INSUFFICIENT; 348 } else { 349 result = audioRecorder_setPreset(ar, *(SLuint32*)pConfigValue); 350 } 351 352 } else { 353 SL_LOGE(ERROR_CONFIG_UNKNOWN_KEY); 354 result = SL_RESULT_PARAMETER_INVALID; 355 } 356 357 return result; 358} 359 360 361//----------------------------------------------------------------------------- 362SLresult android_audioRecorder_getConfig(CAudioRecorder* ar, const SLchar *configKey, 363 SLuint32* pValueSize, void *pConfigValue) { 364 365 SLresult result; 366 367 assert(NULL != ar && NULL != configKey && NULL != pValueSize); 368 if (strcmp((const char*)configKey, (const char*)SL_ANDROID_KEY_RECORDING_PRESET) == 0) { 369 370 // recording preset 371 if (NULL == pConfigValue) { 372 result = SL_RESULT_SUCCESS; 373 } else if (KEY_RECORDING_PRESET_PARAMSIZE > *pValueSize) { 374 SL_LOGE(ERROR_CONFIG_VALUESIZE_TOO_LOW); 375 result = SL_RESULT_BUFFER_INSUFFICIENT; 376 } else { 377 result = audioRecorder_getPreset(ar, (SLuint32*)pConfigValue); 378 } 379 *pValueSize = KEY_RECORDING_PRESET_PARAMSIZE; 380 381 } else { 382 SL_LOGE(ERROR_CONFIG_UNKNOWN_KEY); 383 result = SL_RESULT_PARAMETER_INVALID; 384 } 385 386 return result; 387} 388 389 390//----------------------------------------------------------------------------- 391SLresult android_audioRecorder_realize(CAudioRecorder* ar, SLboolean async) { 392 SL_LOGV("android_audioRecorder_realize(%p) entering", ar); 393 394 SLresult result = SL_RESULT_SUCCESS; 395 396 // initialize platform-independent CAudioRecorder fields 397 if (SL_DATALOCATOR_ANDROIDSIMPLEBUFFERQUEUE != ar->mDataSink.mLocator.mLocatorType) { 398 SL_LOGE(ERROR_RECORDER_SINK_MUST_BE_ANDROIDSIMPLEBUFFERQUEUE); 399 return SL_RESULT_CONTENT_UNSUPPORTED; 400 } 401 // the following platform-independent fields have been initialized in CreateAudioRecorder() 402 // ar->mNumChannels 403 // ar->mSampleRateMilliHz 404 405 SL_LOGV("new AudioRecord %u channels, %u mHz", ar->mNumChannels, ar->mSampleRateMilliHz); 406 407 // currently nothing analogous to canUseFastTrack() for recording 408 audio_input_flags_t policy = AUDIO_INPUT_FLAG_FAST; 409 410 // initialize platform-specific CAudioRecorder fields 411 ar->mAudioRecord = new android::AudioRecord(android::String16()); 412 android::status_t status = ar->mAudioRecord->set( 413 ar->mRecordSource, // source 414 sles_to_android_sampleRate(ar->mSampleRateMilliHz), // sample rate in Hertz 415 AUDIO_FORMAT_PCM_16_BIT, //FIXME use format from buffer queue sink 416 sles_to_android_channelMaskIn(ar->mNumChannels, 0 /*no channel mask*/), 417 // channel config 418 0, //frameCount min 419 audioRecorder_callback,// callback_t 420 (void*)ar, // user, callback data, here the AudioRecorder 421 0, // notificationFrames 422 false, // threadCanCallJava, note: this will prevent direct Java 423 // callbacks, but we don't want them in the recording loop 424 0, // session ID 425 android::AudioRecord::TRANSFER_CALLBACK, 426 // transfer type 427 policy); // audio_input_flags_t 428 429 if (android::NO_ERROR != status) { 430 SL_LOGE("android_audioRecorder_realize(%p) error creating AudioRecord object; status %d", 431 ar, status); 432 // FIXME should return a more specific result depending on status 433 result = SL_RESULT_CONTENT_UNSUPPORTED; 434 ar->mAudioRecord.clear(); 435 } 436 437#ifdef MONITOR_RECORDING 438 gMonitorFp = fopen(MONITOR_TARGET, "w"); 439 if (NULL == gMonitorFp) { SL_LOGE("error opening %s", MONITOR_TARGET); } 440 else { SL_LOGE("recording to %s", MONITOR_TARGET); } // SL_LOGE so it's always displayed 441#endif 442 443 return result; 444} 445 446 447//----------------------------------------------------------------------------- 448/** 449 * Called with a lock on AudioRecorder, and blocks until safe to destroy 450 */ 451void android_audioRecorder_preDestroy(CAudioRecorder* ar) { 452 object_unlock_exclusive(&ar->mObject); 453 if (ar->mCallbackProtector != 0) { 454 ar->mCallbackProtector->requestCbExitAndWait(); 455 } 456 object_lock_exclusive(&ar->mObject); 457} 458 459 460//----------------------------------------------------------------------------- 461void android_audioRecorder_destroy(CAudioRecorder* ar) { 462 SL_LOGV("android_audioRecorder_destroy(%p) entering", ar); 463 464 if (ar->mAudioRecord != 0) { 465 ar->mAudioRecord->stop(); 466 ar->mAudioRecord.clear(); 467 } 468 // explicit destructor 469 ar->mAudioRecord.~sp(); 470 ar->mCallbackProtector.~sp(); 471 472#ifdef MONITOR_RECORDING 473 if (NULL != gMonitorFp) { 474 fclose(gMonitorFp); 475 gMonitorFp = NULL; 476 } 477#endif 478} 479 480 481//----------------------------------------------------------------------------- 482void android_audioRecorder_setRecordState(CAudioRecorder* ar, SLuint32 state) { 483 SL_LOGV("android_audioRecorder_setRecordState(%p, %u) entering", ar, state); 484 485 if (ar->mAudioRecord == 0) { 486 return; 487 } 488 489 switch (state) { 490 case SL_RECORDSTATE_STOPPED: 491 ar->mAudioRecord->stop(); 492 break; 493 case SL_RECORDSTATE_PAUSED: 494 // Note that pausing is treated like stop as this implementation only records to a buffer 495 // queue, so there is no notion of destination being "opened" or "closed" (See description 496 // of SL_RECORDSTATE in specification) 497 ar->mAudioRecord->stop(); 498 break; 499 case SL_RECORDSTATE_RECORDING: 500 ar->mAudioRecord->start(); 501 break; 502 default: 503 break; 504 } 505 506} 507 508 509//----------------------------------------------------------------------------- 510void android_audioRecorder_useRecordEventMask(CAudioRecorder *ar) { 511 IRecord *pRecordItf = &ar->mRecord; 512 SLuint32 eventFlags = pRecordItf->mCallbackEventsMask; 513 514 if (ar->mAudioRecord == 0) { 515 return; 516 } 517 518 if ((eventFlags & SL_RECORDEVENT_HEADATMARKER) && (pRecordItf->mMarkerPosition != 0)) { 519 ar->mAudioRecord->setMarkerPosition((uint32_t)((((int64_t)pRecordItf->mMarkerPosition 520 * sles_to_android_sampleRate(ar->mSampleRateMilliHz)))/1000)); 521 } else { 522 // clear marker 523 ar->mAudioRecord->setMarkerPosition(0); 524 } 525 526 if (eventFlags & SL_RECORDEVENT_HEADATNEWPOS) { 527 SL_LOGV("pos update period %d", pRecordItf->mPositionUpdatePeriod); 528 ar->mAudioRecord->setPositionUpdatePeriod( 529 (uint32_t)((((int64_t)pRecordItf->mPositionUpdatePeriod 530 * sles_to_android_sampleRate(ar->mSampleRateMilliHz)))/1000)); 531 } else { 532 // clear periodic update 533 ar->mAudioRecord->setPositionUpdatePeriod(0); 534 } 535 536 if (eventFlags & SL_RECORDEVENT_HEADATLIMIT) { 537 // FIXME support SL_RECORDEVENT_HEADATLIMIT 538 SL_LOGD("[ FIXME: IRecord_SetCallbackEventsMask(SL_RECORDEVENT_HEADATLIMIT) on an " 539 "SL_OBJECTID_AUDIORECORDER to be implemented ]"); 540 } 541 542 if (eventFlags & SL_RECORDEVENT_HEADMOVING) { 543 // FIXME support SL_RECORDEVENT_HEADMOVING 544 SL_LOGD("[ FIXME: IRecord_SetCallbackEventsMask(SL_RECORDEVENT_HEADMOVING) on an " 545 "SL_OBJECTID_AUDIORECORDER to be implemented ]"); 546 } 547 548 if (eventFlags & SL_RECORDEVENT_BUFFER_FULL) { 549 // nothing to do for SL_RECORDEVENT_BUFFER_FULL since this will not be encountered on 550 // recording to buffer queues 551 } 552 553 if (eventFlags & SL_RECORDEVENT_HEADSTALLED) { 554 // nothing to do for SL_RECORDEVENT_HEADSTALLED, callback event will be checked against mask 555 // when AudioRecord::EVENT_OVERRUN is encountered 556 557 } 558 559} 560 561 562//----------------------------------------------------------------------------- 563void android_audioRecorder_getPosition(CAudioRecorder *ar, SLmillisecond *pPosMsec) { 564 if ((NULL == ar) || (ar->mAudioRecord == 0)) { 565 *pPosMsec = 0; 566 } else { 567 uint32_t positionInFrames; 568 ar->mAudioRecord->getPosition(&positionInFrames); 569 if (ar->mSampleRateMilliHz == UNKNOWN_SAMPLERATE) { 570 *pPosMsec = 0; 571 } else { 572 *pPosMsec = ((int64_t)positionInFrames * 1000) / 573 sles_to_android_sampleRate(ar->mSampleRateMilliHz); 574 } 575 } 576} 577