Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 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 | #include <variablespeed.h> |
| 18 | |
| 19 | #include <unistd.h> |
| 20 | #include <stdlib.h> |
| 21 | |
| 22 | #include <sola_time_scaler.h> |
| 23 | #include <ring_buffer.h> |
| 24 | |
| 25 | #include <hlogging.h> |
| 26 | |
| 27 | #include <vector> |
| 28 | |
Flavio Lerda | e863816 | 2011-09-02 16:40:13 +0100 | [diff] [blame] | 29 | #include <sys/system_properties.h> |
| 30 | |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 31 | // **************************************************************************** |
| 32 | // Constants, utility methods, structures and other miscellany used throughout |
| 33 | // this file. |
| 34 | |
| 35 | namespace { |
| 36 | |
| 37 | // These variables are used to determine the size of the buffer queue used by |
| 38 | // the decoder. |
| 39 | // This is not the same as the large buffer used to hold the uncompressed data |
| 40 | // - for that see the member variable decodeBuffer_. |
| 41 | // The choice of 1152 corresponds to the number of samples per mp3 frame, so is |
| 42 | // a good choice of size for a decoding buffer in the absence of other |
| 43 | // information (we don't know exactly what formats we will be working with). |
| 44 | const size_t kNumberOfBuffersInQueue = 4; |
| 45 | const size_t kNumberOfSamplesPerBuffer = 1152; |
| 46 | const size_t kBufferSizeInBytes = 2 * kNumberOfSamplesPerBuffer; |
| 47 | const size_t kSampleSizeInBytes = 4; |
| 48 | |
| 49 | // When calculating play buffer size before pushing to audio player. |
| 50 | const size_t kNumberOfBytesPerInt16 = 2; |
| 51 | |
| 52 | // How long to sleep during the main play loop and the decoding callback loop. |
| 53 | // In due course this should be replaced with the better signal and wait on |
| 54 | // condition rather than busy-looping. |
| 55 | const int kSleepTimeMicros = 1000; |
| 56 | |
| 57 | // Used in detecting errors with the OpenSL ES framework. |
| 58 | const SLuint32 kPrefetchErrorCandidate = |
| 59 | SL_PREFETCHEVENT_STATUSCHANGE | SL_PREFETCHEVENT_FILLLEVELCHANGE; |
| 60 | |
| 61 | // Structure used when we perform a decoding callback. |
| 62 | typedef struct CallbackContext_ { |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 63 | // Pointer to local storage buffers for decoded audio data. |
| 64 | int8_t* pDataBase; |
| 65 | // Pointer to the current buffer within local storage. |
| 66 | int8_t* pData; |
| 67 | // Used to read the sample rate and channels from the decoding stream during |
| 68 | // the first decoding callback. |
| 69 | SLMetadataExtractionItf decoderMetadata; |
| 70 | // The play interface used for reading duration. |
| 71 | SLPlayItf playItf; |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 72 | } CallbackContext; |
| 73 | |
| 74 | // Local storage for decoded audio data. |
| 75 | int8_t pcmData[kNumberOfBuffersInQueue * kBufferSizeInBytes]; |
| 76 | |
| 77 | #define CheckSLResult(message, result) \ |
| 78 | CheckSLResult_Real(message, result, __LINE__) |
| 79 | |
| 80 | // Helper function for debugging - checks the OpenSL result for success. |
| 81 | void CheckSLResult_Real(const char* message, SLresult result, int line) { |
| 82 | // This can be helpful when debugging. |
| 83 | // LOGD("sl result %d for %s", result, message); |
| 84 | if (SL_RESULT_SUCCESS != result) { |
| 85 | LOGE("slresult was %d at %s file variablespeed line %d", |
| 86 | static_cast<int>(result), message, line); |
| 87 | } |
| 88 | CHECK(SL_RESULT_SUCCESS == result); |
| 89 | } |
| 90 | |
Flavio Lerda | e863816 | 2011-09-02 16:40:13 +0100 | [diff] [blame] | 91 | // Whether logging should be enabled. Only used if LOG_OPENSL_API_CALL is |
| 92 | // defined to use it. |
| 93 | bool gLogEnabled = false; |
| 94 | // The property to set in order to enable logging. |
| 95 | const char *const kLogTagVariableSpeed = "log.tag.VariableSpeed"; |
| 96 | |
| 97 | bool ShouldLog() { |
| 98 | char buffer[PROP_VALUE_MAX]; |
| 99 | __system_property_get(kLogTagVariableSpeed, buffer); |
| 100 | return strlen(buffer) > 0; |
| 101 | } |
| 102 | |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 103 | } // namespace |
| 104 | |
| 105 | // **************************************************************************** |
| 106 | // Static instance of audio engine, and methods for getting, setting and |
| 107 | // deleting it. |
| 108 | |
| 109 | // The single global audio engine instance. |
| 110 | AudioEngine* AudioEngine::audioEngine_ = NULL; |
| 111 | android::Mutex publishEngineLock_; |
| 112 | |
| 113 | AudioEngine* AudioEngine::GetEngine() { |
| 114 | android::Mutex::Autolock autoLock(publishEngineLock_); |
| 115 | if (audioEngine_ == NULL) { |
| 116 | LOGE("you haven't initialized the audio engine"); |
| 117 | CHECK(false); |
| 118 | return NULL; |
| 119 | } |
| 120 | return audioEngine_; |
| 121 | } |
| 122 | |
| 123 | void AudioEngine::SetEngine(AudioEngine* engine) { |
| 124 | if (audioEngine_ != NULL) { |
| 125 | LOGE("you have already set the audio engine"); |
| 126 | CHECK(false); |
| 127 | return; |
| 128 | } |
| 129 | audioEngine_ = engine; |
| 130 | } |
| 131 | |
| 132 | void AudioEngine::DeleteEngine() { |
| 133 | if (audioEngine_ == NULL) { |
| 134 | LOGE("you haven't initialized the audio engine"); |
| 135 | CHECK(false); |
| 136 | return; |
| 137 | } |
| 138 | delete audioEngine_; |
| 139 | audioEngine_ = NULL; |
| 140 | } |
| 141 | |
| 142 | // **************************************************************************** |
| 143 | // The callbacks from the engine require static callback functions. |
| 144 | // Here are the static functions - they just delegate to instance methods on |
| 145 | // the engine. |
| 146 | |
| 147 | static void PlayingBufferQueueCb(SLAndroidSimpleBufferQueueItf, void*) { |
| 148 | AudioEngine::GetEngine()->PlayingBufferQueueCallback(); |
| 149 | } |
| 150 | |
| 151 | static void PrefetchEventCb(SLPrefetchStatusItf caller, void*, SLuint32 event) { |
| 152 | AudioEngine::GetEngine()->PrefetchEventCallback(caller, event); |
| 153 | } |
| 154 | |
| 155 | static void DecodingBufferQueueCb(SLAndroidSimpleBufferQueueItf queueItf, |
| 156 | void *context) { |
| 157 | AudioEngine::GetEngine()->DecodingBufferQueueCallback(queueItf, context); |
| 158 | } |
| 159 | |
| 160 | static void DecodingEventCb(SLPlayItf caller, void*, SLuint32 event) { |
| 161 | AudioEngine::GetEngine()->DecodingEventCallback(caller, event); |
| 162 | } |
| 163 | |
| 164 | // **************************************************************************** |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 165 | // Macros for making working with OpenSL easier. |
| 166 | |
Flavio Lerda | e863816 | 2011-09-02 16:40:13 +0100 | [diff] [blame] | 167 | // Log based on the value of a property. |
| 168 | #define LOG_OPENSL_API_CALL(string) (gLogEnabled && LOGV(string)) |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 169 | |
| 170 | // The regular macro: log an api call, make the api call, check the result. |
| 171 | #define OpenSL(obj, method, ...) \ |
| 172 | { \ |
| 173 | LOG_OPENSL_API_CALL("OpenSL " #method "(" #obj ", " #__VA_ARGS__ ")"); \ |
| 174 | SLresult result = (*obj)->method(obj, __VA_ARGS__); \ |
| 175 | CheckSLResult("OpenSL " #method "(" #obj ", " #__VA_ARGS__ ")", result); \ |
| 176 | } |
| 177 | |
| 178 | // Special case call for api call that has void return value, can't be checked. |
| 179 | #define VoidOpenSL(obj, method) \ |
| 180 | { \ |
| 181 | LOG_OPENSL_API_CALL("OpenSL (void) " #method "(" #obj ")"); \ |
| 182 | (*obj)->method(obj); \ |
| 183 | } |
| 184 | |
| 185 | // Special case for api call with checked result but takes no arguments. |
| 186 | #define OpenSL0(obj, method) \ |
| 187 | { \ |
| 188 | LOG_OPENSL_API_CALL("OpenSL " #method "(" #obj ")"); \ |
| 189 | SLresult result = (*obj)->method(obj); \ |
| 190 | CheckSLResult("OpenSL " #method "(" #obj ")", result); \ |
| 191 | } |
| 192 | |
| 193 | // Special case for api call whose result we want to store, not check. |
| 194 | // We have to encapsulate the two calls in braces, so that this expression |
| 195 | // evaluates to the last expression not the first. |
| 196 | #define ReturnOpenSL(obj, method, ...) \ |
| 197 | ( \ |
| 198 | LOG_OPENSL_API_CALL("OpenSL (int) " \ |
| 199 | #method "(" #obj ", " #__VA_ARGS__ ")"), \ |
| 200 | (*obj)->method(obj, __VA_ARGS__) \ |
| 201 | ) \ |
| 202 | |
| 203 | // **************************************************************************** |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 204 | // Static utility methods. |
| 205 | |
Flavio Lerda | dc442b4 | 2011-08-31 15:49:53 +0100 | [diff] [blame] | 206 | // Set the audio stream type for the player. |
| 207 | // |
| 208 | // Must be called before it is realized. |
| 209 | // |
| 210 | // The caller must have requested the SL_IID_ANDROIDCONFIGURATION interface when |
| 211 | // creating the player. |
| 212 | static void setAudioStreamType(SLObjectItf audioPlayer, SLint32 audioStreamType) { |
| 213 | SLAndroidConfigurationItf playerConfig; |
| 214 | OpenSL(audioPlayer, GetInterface, SL_IID_ANDROIDCONFIGURATION, &playerConfig); |
| 215 | // The STREAM_XXX constants defined by android.media.AudioManager match the |
| 216 | // corresponding SL_ANDROID_STREAM_XXX constants defined by |
| 217 | // include/SLES/OpenSLES_AndroidConfiguration.h, so we can just pass the |
| 218 | // value across. |
| 219 | OpenSL(playerConfig, SetConfiguration, SL_ANDROID_KEY_STREAM_TYPE, |
| 220 | &audioStreamType, sizeof(audioStreamType)); |
| 221 | } |
| 222 | |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 223 | // Must be called with callbackLock_ held. |
| 224 | static void ReadSampleRateAndChannelCount(CallbackContext *pContext, |
| 225 | SLuint32 *sampleRateOut, SLuint32 *channelsOut) { |
| 226 | SLMetadataExtractionItf decoderMetadata = pContext->decoderMetadata; |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 227 | SLuint32 itemCount; |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 228 | OpenSL(decoderMetadata, GetItemCount, &itemCount); |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 229 | SLuint32 i, keySize, valueSize; |
| 230 | SLMetadataInfo *keyInfo, *value; |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 231 | for (i = 0; i < itemCount; ++i) { |
| 232 | keyInfo = value = NULL; |
| 233 | keySize = valueSize = 0; |
| 234 | OpenSL(decoderMetadata, GetKeySize, i, &keySize); |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 235 | keyInfo = static_cast<SLMetadataInfo*>(malloc(keySize)); |
| 236 | if (keyInfo) { |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 237 | OpenSL(decoderMetadata, GetKey, i, keySize, keyInfo); |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 238 | if (keyInfo->encoding == SL_CHARACTERENCODING_ASCII |
| 239 | || keyInfo->encoding == SL_CHARACTERENCODING_UTF8) { |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 240 | OpenSL(decoderMetadata, GetValueSize, i, &valueSize); |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 241 | value = static_cast<SLMetadataInfo*>(malloc(valueSize)); |
| 242 | if (value) { |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 243 | OpenSL(decoderMetadata, GetValue, i, valueSize, value); |
Hugo Hudson | efaa38a | 2011-09-09 14:46:15 +0100 | [diff] [blame] | 244 | if (strcmp((char*) keyInfo->data, ANDROID_KEY_PCMFORMAT_SAMPLERATE) == 0) { |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 245 | SLuint32 sampleRate = *(reinterpret_cast<SLuint32*>(value->data)); |
| 246 | LOGD("sample Rate: %d", sampleRate); |
| 247 | *sampleRateOut = sampleRate; |
Hugo Hudson | efaa38a | 2011-09-09 14:46:15 +0100 | [diff] [blame] | 248 | } else if (strcmp((char*) keyInfo->data, ANDROID_KEY_PCMFORMAT_NUMCHANNELS) == 0) { |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 249 | SLuint32 channels = *(reinterpret_cast<SLuint32*>(value->data)); |
| 250 | LOGD("channels: %d", channels); |
| 251 | *channelsOut = channels; |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 252 | } |
| 253 | free(value); |
| 254 | } |
| 255 | } |
| 256 | free(keyInfo); |
| 257 | } |
| 258 | } |
| 259 | } |
| 260 | |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 261 | // Must be called with callbackLock_ held. |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 262 | static void RegisterCallbackContextAndAddEnqueueBuffersToDecoder( |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 263 | SLAndroidSimpleBufferQueueItf decoderQueue, CallbackContext* context) { |
| 264 | // Register a callback on the decoder queue, so that we will be called |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 265 | // throughout the decoding process (and can then extract the decoded audio |
| 266 | // for the next bit of the pipeline). |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 267 | OpenSL(decoderQueue, RegisterCallback, DecodingBufferQueueCb, context); |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 268 | |
| 269 | // Enqueue buffers to map the region of memory allocated to store the |
| 270 | // decoded data. |
| 271 | for (size_t i = 0; i < kNumberOfBuffersInQueue; i++) { |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 272 | OpenSL(decoderQueue, Enqueue, context->pData, kBufferSizeInBytes); |
Hugo Hudson | 9730f15 | 2011-07-25 17:04:42 +0100 | [diff] [blame] | 273 | context->pData += kBufferSizeInBytes; |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 274 | } |
Hugo Hudson | 9730f15 | 2011-07-25 17:04:42 +0100 | [diff] [blame] | 275 | context->pData = context->pDataBase; |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 276 | } |
| 277 | |
| 278 | // **************************************************************************** |
| 279 | // Constructor and Destructor. |
| 280 | |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 281 | AudioEngine::AudioEngine(size_t targetFrames, float windowDuration, |
| 282 | float windowOverlapDuration, size_t maxPlayBufferCount, float initialRate, |
Flavio Lerda | dc442b4 | 2011-08-31 15:49:53 +0100 | [diff] [blame] | 283 | size_t decodeInitialSize, size_t decodeMaxSize, size_t startPositionMillis, |
| 284 | int audioStreamType) |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 285 | : decodeBuffer_(decodeInitialSize, decodeMaxSize), |
| 286 | playingBuffers_(), freeBuffers_(), timeScaler_(NULL), |
| 287 | floatBuffer_(NULL), injectBuffer_(NULL), |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 288 | mSampleRate(0), mChannels(0), |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 289 | targetFrames_(targetFrames), |
| 290 | windowDuration_(windowDuration), |
| 291 | windowOverlapDuration_(windowOverlapDuration), |
| 292 | maxPlayBufferCount_(maxPlayBufferCount), initialRate_(initialRate), |
| 293 | startPositionMillis_(startPositionMillis), |
Flavio Lerda | dc442b4 | 2011-08-31 15:49:53 +0100 | [diff] [blame] | 294 | audioStreamType_(audioStreamType), |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 295 | totalDurationMs_(0), decoderCurrentPosition_(0), startRequested_(false), |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 296 | stopRequested_(false), finishedDecoding_(false) { |
Flavio Lerda | e863816 | 2011-09-02 16:40:13 +0100 | [diff] [blame] | 297 | // Determine whether we should log calls. |
| 298 | gLogEnabled = ShouldLog(); |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 299 | } |
| 300 | |
| 301 | AudioEngine::~AudioEngine() { |
| 302 | // destroy the time scaler |
| 303 | if (timeScaler_ != NULL) { |
| 304 | delete timeScaler_; |
| 305 | timeScaler_ = NULL; |
| 306 | } |
| 307 | |
| 308 | // delete all outstanding playing and free buffers |
| 309 | android::Mutex::Autolock autoLock(playBufferLock_); |
| 310 | while (playingBuffers_.size() > 0) { |
| 311 | delete[] playingBuffers_.front(); |
| 312 | playingBuffers_.pop(); |
| 313 | } |
| 314 | while (freeBuffers_.size() > 0) { |
| 315 | delete[] freeBuffers_.top(); |
| 316 | freeBuffers_.pop(); |
| 317 | } |
| 318 | |
| 319 | delete[] floatBuffer_; |
| 320 | floatBuffer_ = NULL; |
| 321 | delete[] injectBuffer_; |
| 322 | injectBuffer_ = NULL; |
| 323 | } |
| 324 | |
| 325 | // **************************************************************************** |
| 326 | // Regular AudioEngine class methods. |
| 327 | |
| 328 | void AudioEngine::SetVariableSpeed(float speed) { |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 329 | // TODO: Mutex for shared time scaler accesses. |
Hugo Hudson | 64f5ba6 | 2011-08-10 15:57:28 +0100 | [diff] [blame] | 330 | if (HasSampleRateAndChannels()) { |
| 331 | GetTimeScaler()->set_speed(speed); |
| 332 | } else { |
| 333 | // This is being called at a point where we have not yet processed enough |
| 334 | // data to determine the sample rate and number of channels. |
| 335 | // Ignore the call. See http://b/5140693. |
| 336 | LOGD("set varaible speed called, sample rate and channels not ready yet"); |
| 337 | } |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 338 | } |
| 339 | |
| 340 | void AudioEngine::RequestStart() { |
| 341 | android::Mutex::Autolock autoLock(lock_); |
| 342 | startRequested_ = true; |
| 343 | } |
| 344 | |
| 345 | void AudioEngine::ClearRequestStart() { |
| 346 | android::Mutex::Autolock autoLock(lock_); |
| 347 | startRequested_ = false; |
| 348 | } |
| 349 | |
| 350 | bool AudioEngine::GetWasStartRequested() { |
| 351 | android::Mutex::Autolock autoLock(lock_); |
| 352 | return startRequested_; |
| 353 | } |
| 354 | |
| 355 | void AudioEngine::RequestStop() { |
| 356 | android::Mutex::Autolock autoLock(lock_); |
| 357 | stopRequested_ = true; |
| 358 | } |
| 359 | |
| 360 | int AudioEngine::GetCurrentPosition() { |
| 361 | android::Mutex::Autolock autoLock(decodeBufferLock_); |
| 362 | double result = decodeBuffer_.GetTotalAdvancedCount(); |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 363 | // TODO: This is horrible, but should be removed soon once the outstanding |
| 364 | // issue with get current position on decoder is fixed. |
| 365 | android::Mutex::Autolock autoLock2(callbackLock_); |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 366 | return static_cast<int>( |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 367 | (result * 1000) / mSampleRate / mChannels + startPositionMillis_); |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 368 | } |
| 369 | |
| 370 | int AudioEngine::GetTotalDuration() { |
| 371 | android::Mutex::Autolock autoLock(lock_); |
| 372 | return static_cast<int>(totalDurationMs_); |
| 373 | } |
| 374 | |
| 375 | video_editing::SolaTimeScaler* AudioEngine::GetTimeScaler() { |
| 376 | if (timeScaler_ == NULL) { |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 377 | CHECK(HasSampleRateAndChannels()); |
| 378 | android::Mutex::Autolock autoLock(callbackLock_); |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 379 | timeScaler_ = new video_editing::SolaTimeScaler(); |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 380 | timeScaler_->Init(mSampleRate, mChannels, initialRate_, windowDuration_, |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 381 | windowOverlapDuration_); |
| 382 | } |
| 383 | return timeScaler_; |
| 384 | } |
| 385 | |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 386 | bool AudioEngine::EnqueueNextBufferOfAudio( |
| 387 | SLAndroidSimpleBufferQueueItf audioPlayerQueue) { |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 388 | size_t channels; |
| 389 | { |
| 390 | android::Mutex::Autolock autoLock(callbackLock_); |
| 391 | channels = mChannels; |
| 392 | } |
| 393 | size_t frameSizeInBytes = kSampleSizeInBytes * channels; |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 394 | size_t frameCount = 0; |
| 395 | while (frameCount < targetFrames_) { |
| 396 | size_t framesLeft = targetFrames_ - frameCount; |
| 397 | // If there is data already in the time scaler, retrieve it. |
| 398 | if (GetTimeScaler()->available() > 0) { |
| 399 | size_t retrieveCount = min(GetTimeScaler()->available(), framesLeft); |
| 400 | int count = GetTimeScaler()->RetrieveSamples( |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 401 | floatBuffer_ + frameCount * channels, retrieveCount); |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 402 | if (count <= 0) { |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 403 | LOGD("error: count was %d", count); |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 404 | break; |
| 405 | } |
| 406 | frameCount += count; |
| 407 | continue; |
| 408 | } |
| 409 | // If there is no data in the time scaler, then feed some into it. |
| 410 | android::Mutex::Autolock autoLock(decodeBufferLock_); |
| 411 | size_t framesInDecodeBuffer = |
| 412 | decodeBuffer_.GetSizeInBytes() / frameSizeInBytes; |
| 413 | size_t framesScalerCanHandle = GetTimeScaler()->input_limit(); |
| 414 | size_t framesToInject = min(framesInDecodeBuffer, |
| 415 | min(targetFrames_, framesScalerCanHandle)); |
| 416 | if (framesToInject <= 0) { |
| 417 | // No more frames left to inject. |
| 418 | break; |
| 419 | } |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 420 | for (size_t i = 0; i < framesToInject * channels; ++i) { |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 421 | injectBuffer_[i] = decodeBuffer_.GetAtIndex(i); |
| 422 | } |
| 423 | int count = GetTimeScaler()->InjectSamples(injectBuffer_, framesToInject); |
| 424 | if (count <= 0) { |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 425 | LOGD("error: count was %d", count); |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 426 | break; |
| 427 | } |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 428 | decodeBuffer_.AdvanceHeadPointerShorts(count * channels); |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 429 | } |
| 430 | if (frameCount <= 0) { |
| 431 | // We must have finished playback. |
| 432 | if (GetEndOfDecoderReached()) { |
| 433 | // If we've finished decoding, clear the buffer - so we will terminate. |
| 434 | ClearDecodeBuffer(); |
| 435 | } |
| 436 | return false; |
| 437 | } |
| 438 | |
| 439 | // Get a free playing buffer. |
| 440 | int16* playBuffer; |
| 441 | { |
| 442 | android::Mutex::Autolock autoLock(playBufferLock_); |
| 443 | if (freeBuffers_.size() > 0) { |
| 444 | // If we have a free buffer, recycle it. |
| 445 | playBuffer = freeBuffers_.top(); |
| 446 | freeBuffers_.pop(); |
| 447 | } else { |
| 448 | // Otherwise allocate a new one. |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 449 | playBuffer = new int16[targetFrames_ * channels]; |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 450 | } |
| 451 | } |
| 452 | |
| 453 | // Try to play the buffer. |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 454 | for (size_t i = 0; i < frameCount * channels; ++i) { |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 455 | playBuffer[i] = floatBuffer_[i]; |
| 456 | } |
| 457 | size_t sizeOfPlayBufferInBytes = |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 458 | frameCount * channels * kNumberOfBytesPerInt16; |
| 459 | SLresult result = ReturnOpenSL(audioPlayerQueue, Enqueue, playBuffer, |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 460 | sizeOfPlayBufferInBytes); |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 461 | if (result == SL_RESULT_SUCCESS) { |
| 462 | android::Mutex::Autolock autoLock(playBufferLock_); |
| 463 | playingBuffers_.push(playBuffer); |
| 464 | } else { |
| 465 | LOGE("could not enqueue audio buffer"); |
| 466 | delete[] playBuffer; |
| 467 | } |
| 468 | |
| 469 | return (result == SL_RESULT_SUCCESS); |
| 470 | } |
| 471 | |
| 472 | bool AudioEngine::GetEndOfDecoderReached() { |
| 473 | android::Mutex::Autolock autoLock(lock_); |
| 474 | return finishedDecoding_; |
| 475 | } |
| 476 | |
| 477 | void AudioEngine::SetEndOfDecoderReached() { |
| 478 | android::Mutex::Autolock autoLock(lock_); |
| 479 | finishedDecoding_ = true; |
| 480 | } |
| 481 | |
| 482 | bool AudioEngine::PlayFileDescriptor(int fd, int64 offset, int64 length) { |
| 483 | SLDataLocator_AndroidFD loc_fd = { |
| 484 | SL_DATALOCATOR_ANDROIDFD, fd, offset, length }; |
| 485 | SLDataFormat_MIME format_mime = { |
| 486 | SL_DATAFORMAT_MIME, NULL, SL_CONTAINERTYPE_UNSPECIFIED }; |
| 487 | SLDataSource audioSrc = { &loc_fd, &format_mime }; |
| 488 | return PlayFromThisSource(audioSrc); |
| 489 | } |
| 490 | |
| 491 | bool AudioEngine::PlayUri(const char* uri) { |
| 492 | // Source of audio data for the decoding |
| 493 | SLDataLocator_URI decUri = { SL_DATALOCATOR_URI, |
| 494 | const_cast<SLchar*>(reinterpret_cast<const SLchar*>(uri)) }; |
| 495 | SLDataFormat_MIME decMime = { |
| 496 | SL_DATAFORMAT_MIME, NULL, SL_CONTAINERTYPE_UNSPECIFIED }; |
| 497 | SLDataSource decSource = { &decUri, &decMime }; |
| 498 | return PlayFromThisSource(decSource); |
| 499 | } |
| 500 | |
| 501 | bool AudioEngine::IsDecodeBufferEmpty() { |
| 502 | android::Mutex::Autolock autoLock(decodeBufferLock_); |
| 503 | return decodeBuffer_.GetSizeInBytes() <= 0; |
| 504 | } |
| 505 | |
| 506 | void AudioEngine::ClearDecodeBuffer() { |
| 507 | android::Mutex::Autolock autoLock(decodeBufferLock_); |
| 508 | decodeBuffer_.Clear(); |
| 509 | } |
| 510 | |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 511 | static size_t ReadDuration(SLPlayItf playItf) { |
| 512 | SLmillisecond durationInMsec = SL_TIME_UNKNOWN; |
| 513 | OpenSL(playItf, GetDuration, &durationInMsec); |
| 514 | if (durationInMsec == SL_TIME_UNKNOWN) { |
| 515 | LOGE("can't get duration"); |
| 516 | return 0; |
| 517 | } |
| 518 | LOGD("duration: %d", static_cast<int>(durationInMsec)); |
| 519 | return durationInMsec; |
| 520 | } |
| 521 | |
| 522 | static size_t ReadPosition(SLPlayItf playItf) { |
| 523 | SLmillisecond positionInMsec = SL_TIME_UNKNOWN; |
| 524 | OpenSL(playItf, GetPosition, &positionInMsec); |
| 525 | if (positionInMsec == SL_TIME_UNKNOWN) { |
| 526 | LOGE("can't get position"); |
| 527 | return 0; |
| 528 | } |
| 529 | LOGW("decoder position: %d", static_cast<int>(positionInMsec)); |
| 530 | return positionInMsec; |
| 531 | } |
| 532 | |
Hugo Hudson | 9730f15 | 2011-07-25 17:04:42 +0100 | [diff] [blame] | 533 | static void CreateAndRealizeEngine(SLObjectItf &engine, |
| 534 | SLEngineItf &engineInterface) { |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 535 | SLEngineOption EngineOption[] = { { |
| 536 | SL_ENGINEOPTION_THREADSAFE, SL_BOOLEAN_TRUE } }; |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 537 | SLresult result = slCreateEngine(&engine, 1, EngineOption, 0, NULL, NULL); |
| 538 | CheckSLResult("create engine", result); |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 539 | OpenSL(engine, Realize, SL_BOOLEAN_FALSE); |
| 540 | OpenSL(engine, GetInterface, SL_IID_ENGINE, &engineInterface); |
Hugo Hudson | 9730f15 | 2011-07-25 17:04:42 +0100 | [diff] [blame] | 541 | } |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 542 | |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 543 | SLuint32 AudioEngine::GetSLSampleRate() { |
| 544 | android::Mutex::Autolock autoLock(callbackLock_); |
| 545 | return mSampleRate * 1000; |
Hugo Hudson | 9730f15 | 2011-07-25 17:04:42 +0100 | [diff] [blame] | 546 | } |
| 547 | |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 548 | SLuint32 AudioEngine::GetSLChannels() { |
| 549 | android::Mutex::Autolock autoLock(callbackLock_); |
| 550 | switch (mChannels) { |
Hugo Hudson | 9730f15 | 2011-07-25 17:04:42 +0100 | [diff] [blame] | 551 | case 2: |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 552 | return SL_SPEAKER_FRONT_LEFT | SL_SPEAKER_FRONT_RIGHT; |
Hugo Hudson | 9730f15 | 2011-07-25 17:04:42 +0100 | [diff] [blame] | 553 | case 1: |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 554 | return SL_SPEAKER_FRONT_CENTER; |
Hugo Hudson | 9730f15 | 2011-07-25 17:04:42 +0100 | [diff] [blame] | 555 | default: |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 556 | LOGE("unknown channels %d, using 2", mChannels); |
| 557 | return SL_SPEAKER_FRONT_LEFT | SL_SPEAKER_FRONT_RIGHT; |
Hugo Hudson | 9730f15 | 2011-07-25 17:04:42 +0100 | [diff] [blame] | 558 | } |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 559 | } |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 560 | |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 561 | SLuint32 AudioEngine::GetChannelCount() { |
| 562 | android::Mutex::Autolock autoLock(callbackLock_); |
| 563 | return mChannels; |
| 564 | } |
| 565 | |
| 566 | static void CreateAndRealizeAudioPlayer(SLuint32 slSampleRate, |
Ashok Bhat | f12ca30 | 2014-02-12 13:43:25 +0000 | [diff] [blame] | 567 | SLuint32 channelCount, SLuint32 slChannels, SLint32 audioStreamType, SLObjectItf &outputMix, |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 568 | SLObjectItf &audioPlayer, SLEngineItf &engineInterface) { |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 569 | // Define the source and sink for the audio player: comes from a buffer queue |
| 570 | // and goes to the output mix. |
| 571 | SLDataLocator_AndroidSimpleBufferQueue loc_bufq = { |
| 572 | SL_DATALOCATOR_ANDROIDSIMPLEBUFFERQUEUE, 2 }; |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 573 | SLDataFormat_PCM format_pcm = {SL_DATAFORMAT_PCM, channelCount, slSampleRate, |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 574 | SL_PCMSAMPLEFORMAT_FIXED_16, SL_PCMSAMPLEFORMAT_FIXED_16, |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 575 | slChannels, SL_BYTEORDER_LITTLEENDIAN}; |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 576 | SLDataSource playingSrc = {&loc_bufq, &format_pcm}; |
| 577 | SLDataLocator_OutputMix loc_outmix = {SL_DATALOCATOR_OUTPUTMIX, outputMix}; |
| 578 | SLDataSink audioSnk = {&loc_outmix, NULL}; |
| 579 | |
| 580 | // Create the audio player, which will play from the buffer queue and send to |
| 581 | // the output mix. |
Flavio Lerda | dc442b4 | 2011-08-31 15:49:53 +0100 | [diff] [blame] | 582 | const size_t playerInterfaceCount = 2; |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 583 | const SLInterfaceID iids[playerInterfaceCount] = { |
Flavio Lerda | dc442b4 | 2011-08-31 15:49:53 +0100 | [diff] [blame] | 584 | SL_IID_ANDROIDSIMPLEBUFFERQUEUE, SL_IID_ANDROIDCONFIGURATION }; |
Glenn Kasten | cd96143 | 2012-07-03 13:13:53 -0700 | [diff] [blame] | 585 | const SLboolean reqs[playerInterfaceCount] = { SL_BOOLEAN_TRUE, SL_BOOLEAN_TRUE }; |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 586 | OpenSL(engineInterface, CreateAudioPlayer, &audioPlayer, &playingSrc, |
| 587 | &audioSnk, playerInterfaceCount, iids, reqs); |
Flavio Lerda | dc442b4 | 2011-08-31 15:49:53 +0100 | [diff] [blame] | 588 | setAudioStreamType(audioPlayer, audioStreamType); |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 589 | OpenSL(audioPlayer, Realize, SL_BOOLEAN_FALSE); |
Hugo Hudson | 9730f15 | 2011-07-25 17:04:42 +0100 | [diff] [blame] | 590 | } |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 591 | |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 592 | bool AudioEngine::HasSampleRateAndChannels() { |
| 593 | android::Mutex::Autolock autoLock(callbackLock_); |
| 594 | return mChannels != 0 && mSampleRate != 0; |
Hugo Hudson | 9730f15 | 2011-07-25 17:04:42 +0100 | [diff] [blame] | 595 | } |
| 596 | |
| 597 | bool AudioEngine::PlayFromThisSource(const SLDataSource& audioSrc) { |
| 598 | ClearDecodeBuffer(); |
| 599 | |
Hugo Hudson | 9730f15 | 2011-07-25 17:04:42 +0100 | [diff] [blame] | 600 | SLObjectItf engine; |
| 601 | SLEngineItf engineInterface; |
| 602 | CreateAndRealizeEngine(engine, engineInterface); |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 603 | |
| 604 | // Define the source and sink for the decoding player: comes from the source |
| 605 | // this method was called with, is sent to another buffer queue. |
| 606 | SLDataLocator_AndroidSimpleBufferQueue decBuffQueue; |
| 607 | decBuffQueue.locatorType = SL_DATALOCATOR_ANDROIDSIMPLEBUFFERQUEUE; |
| 608 | decBuffQueue.numBuffers = kNumberOfBuffersInQueue; |
| 609 | // A valid value seems required here but is currently ignored. |
Hugo Hudson | 9730f15 | 2011-07-25 17:04:42 +0100 | [diff] [blame] | 610 | SLDataFormat_PCM pcm = {SL_DATAFORMAT_PCM, 1, SL_SAMPLINGRATE_44_1, |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 611 | SL_PCMSAMPLEFORMAT_FIXED_16, 16, |
| 612 | SL_SPEAKER_FRONT_LEFT, SL_BYTEORDER_LITTLEENDIAN}; |
| 613 | SLDataSink decDest = { &decBuffQueue, &pcm }; |
| 614 | |
| 615 | // Create the decoder with the given source and sink. |
Flavio Lerda | dc442b4 | 2011-08-31 15:49:53 +0100 | [diff] [blame] | 616 | const size_t decoderInterfaceCount = 5; |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 617 | SLObjectItf decoder; |
| 618 | const SLInterfaceID decodePlayerInterfaces[decoderInterfaceCount] = { |
| 619 | SL_IID_ANDROIDSIMPLEBUFFERQUEUE, SL_IID_PREFETCHSTATUS, SL_IID_SEEK, |
Flavio Lerda | dc442b4 | 2011-08-31 15:49:53 +0100 | [diff] [blame] | 620 | SL_IID_METADATAEXTRACTION, SL_IID_ANDROIDCONFIGURATION }; |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 621 | const SLboolean decodePlayerRequired[decoderInterfaceCount] = { |
Glenn Kasten | cd96143 | 2012-07-03 13:13:53 -0700 | [diff] [blame] | 622 | SL_BOOLEAN_TRUE, SL_BOOLEAN_TRUE, SL_BOOLEAN_TRUE, SL_BOOLEAN_TRUE, SL_BOOLEAN_TRUE }; |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 623 | SLDataSource sourceCopy(audioSrc); |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 624 | OpenSL(engineInterface, CreateAudioPlayer, &decoder, &sourceCopy, &decDest, |
| 625 | decoderInterfaceCount, decodePlayerInterfaces, decodePlayerRequired); |
Flavio Lerda | dc442b4 | 2011-08-31 15:49:53 +0100 | [diff] [blame] | 626 | // Not sure if this is necessary, but just in case. |
| 627 | setAudioStreamType(decoder, audioStreamType_); |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 628 | OpenSL(decoder, Realize, SL_BOOLEAN_FALSE); |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 629 | |
| 630 | // Get the play interface from the decoder, and register event callbacks. |
| 631 | // Get the buffer queue, prefetch and seek interfaces. |
Hugo Hudson | 9730f15 | 2011-07-25 17:04:42 +0100 | [diff] [blame] | 632 | SLPlayItf decoderPlay = NULL; |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 633 | SLAndroidSimpleBufferQueueItf decoderQueue = NULL; |
| 634 | SLPrefetchStatusItf decoderPrefetch = NULL; |
| 635 | SLSeekItf decoderSeek = NULL; |
| 636 | SLMetadataExtractionItf decoderMetadata = NULL; |
| 637 | OpenSL(decoder, GetInterface, SL_IID_PLAY, &decoderPlay); |
| 638 | OpenSL(decoderPlay, SetCallbackEventsMask, SL_PLAYEVENT_HEADATEND); |
| 639 | OpenSL(decoderPlay, RegisterCallback, DecodingEventCb, NULL); |
| 640 | OpenSL(decoder, GetInterface, SL_IID_PREFETCHSTATUS, &decoderPrefetch); |
| 641 | OpenSL(decoder, GetInterface, SL_IID_SEEK, &decoderSeek); |
| 642 | OpenSL(decoder, GetInterface, SL_IID_METADATAEXTRACTION, &decoderMetadata); |
| 643 | OpenSL(decoder, GetInterface, SL_IID_ANDROIDSIMPLEBUFFERQUEUE, |
| 644 | &decoderQueue); |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 645 | |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 646 | // Initialize the callback structure, used during the decoding. |
Hugo Hudson | 9730f15 | 2011-07-25 17:04:42 +0100 | [diff] [blame] | 647 | CallbackContext callbackContext; |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 648 | { |
| 649 | android::Mutex::Autolock autoLock(callbackLock_); |
| 650 | callbackContext.pDataBase = pcmData; |
| 651 | callbackContext.pData = pcmData; |
| 652 | callbackContext.decoderMetadata = decoderMetadata; |
| 653 | callbackContext.playItf = decoderPlay; |
| 654 | RegisterCallbackContextAndAddEnqueueBuffersToDecoder( |
| 655 | decoderQueue, &callbackContext); |
| 656 | } |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 657 | |
| 658 | // Initialize the callback for prefetch errors, if we can't open the |
| 659 | // resource to decode. |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 660 | OpenSL(decoderPrefetch, SetCallbackEventsMask, kPrefetchErrorCandidate); |
| 661 | OpenSL(decoderPrefetch, RegisterCallback, PrefetchEventCb, &decoderPrefetch); |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 662 | |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 663 | // Seek to the start position. |
| 664 | OpenSL(decoderSeek, SetPosition, startPositionMillis_, SL_SEEKMODE_ACCURATE); |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 665 | |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 666 | // Start decoding immediately. |
| 667 | OpenSL(decoderPlay, SetPlayState, SL_PLAYSTATE_PLAYING); |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 668 | |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 669 | // These variables hold the audio player and its output. |
| 670 | // They will only be constructed once the decoder has invoked the callback, |
| 671 | // and given us the correct sample rate, number of channels and duration. |
Hugo Hudson | 9730f15 | 2011-07-25 17:04:42 +0100 | [diff] [blame] | 672 | SLObjectItf outputMix = NULL; |
| 673 | SLObjectItf audioPlayer = NULL; |
| 674 | SLPlayItf audioPlayerPlay = NULL; |
| 675 | SLAndroidSimpleBufferQueueItf audioPlayerQueue = NULL; |
| 676 | |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 677 | // The main loop - until we're told to stop: if there is audio data coming |
| 678 | // out of the decoder, feed it through the time scaler. |
| 679 | // As it comes out of the time scaler, feed it into the audio player. |
| 680 | while (!Finished()) { |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 681 | if (GetWasStartRequested() && HasSampleRateAndChannels()) { |
| 682 | // Build the audio player. |
| 683 | // TODO: What happens if I maliciously call start lots of times? |
| 684 | floatBuffer_ = new float[targetFrames_ * mChannels]; |
| 685 | injectBuffer_ = new float[targetFrames_ * mChannels]; |
| 686 | OpenSL(engineInterface, CreateOutputMix, &outputMix, 0, NULL, NULL); |
| 687 | OpenSL(outputMix, Realize, SL_BOOLEAN_FALSE); |
| 688 | CreateAndRealizeAudioPlayer(GetSLSampleRate(), GetChannelCount(), |
Flavio Lerda | dc442b4 | 2011-08-31 15:49:53 +0100 | [diff] [blame] | 689 | GetSLChannels(), audioStreamType_, outputMix, audioPlayer, |
| 690 | engineInterface); |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 691 | OpenSL(audioPlayer, GetInterface, SL_IID_PLAY, &audioPlayerPlay); |
| 692 | OpenSL(audioPlayer, GetInterface, SL_IID_ANDROIDSIMPLEBUFFERQUEUE, |
| 693 | &audioPlayerQueue); |
| 694 | OpenSL(audioPlayerQueue, RegisterCallback, PlayingBufferQueueCb, NULL); |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 695 | ClearRequestStart(); |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 696 | OpenSL(audioPlayerPlay, SetPlayState, SL_PLAYSTATE_PLAYING); |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 697 | } |
| 698 | EnqueueMoreAudioIfNecessary(audioPlayerQueue); |
| 699 | usleep(kSleepTimeMicros); |
| 700 | } |
| 701 | |
Hugo Hudson | 9730f15 | 2011-07-25 17:04:42 +0100 | [diff] [blame] | 702 | // Delete the audio player and output mix, iff they have been created. |
| 703 | if (audioPlayer != NULL) { |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 704 | OpenSL(audioPlayerPlay, SetPlayState, SL_PLAYSTATE_STOPPED); |
| 705 | OpenSL0(audioPlayerQueue, Clear); |
| 706 | OpenSL(audioPlayerQueue, RegisterCallback, NULL, NULL); |
| 707 | VoidOpenSL(audioPlayer, AbortAsyncOperation); |
| 708 | VoidOpenSL(audioPlayer, Destroy); |
| 709 | VoidOpenSL(outputMix, Destroy); |
Hugo Hudson | 9730f15 | 2011-07-25 17:04:42 +0100 | [diff] [blame] | 710 | audioPlayer = NULL; |
| 711 | audioPlayerPlay = NULL; |
| 712 | audioPlayerQueue = NULL; |
| 713 | outputMix = NULL; |
| 714 | } |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 715 | |
| 716 | // Delete the decoder. |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 717 | OpenSL(decoderPlay, SetPlayState, SL_PLAYSTATE_STOPPED); |
| 718 | OpenSL(decoderPrefetch, RegisterCallback, NULL, NULL); |
Hugo Hudson | 9730f15 | 2011-07-25 17:04:42 +0100 | [diff] [blame] | 719 | // This is returning slresult 13 if I do no playback. |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 720 | // Repro is to comment out all before this line, and all after enqueueing |
| 721 | // my buffers. |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 722 | // OpenSL0(decoderQueue, Clear); |
| 723 | OpenSL(decoderQueue, RegisterCallback, NULL, NULL); |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 724 | decoderSeek = NULL; |
| 725 | decoderPrefetch = NULL; |
| 726 | decoderQueue = NULL; |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 727 | OpenSL(decoderPlay, RegisterCallback, NULL, NULL); |
| 728 | VoidOpenSL(decoder, AbortAsyncOperation); |
| 729 | VoidOpenSL(decoder, Destroy); |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 730 | decoderPlay = NULL; |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 731 | |
Hugo Hudson | 9730f15 | 2011-07-25 17:04:42 +0100 | [diff] [blame] | 732 | // Delete the engine. |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 733 | VoidOpenSL(engine, Destroy); |
Hugo Hudson | 9730f15 | 2011-07-25 17:04:42 +0100 | [diff] [blame] | 734 | engineInterface = NULL; |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 735 | |
| 736 | return true; |
| 737 | } |
| 738 | |
| 739 | bool AudioEngine::Finished() { |
| 740 | if (GetWasStopRequested()) { |
| 741 | return true; |
| 742 | } |
| 743 | android::Mutex::Autolock autoLock(playBufferLock_); |
| 744 | return playingBuffers_.size() <= 0 && |
| 745 | IsDecodeBufferEmpty() && |
| 746 | GetEndOfDecoderReached(); |
| 747 | } |
| 748 | |
| 749 | bool AudioEngine::GetWasStopRequested() { |
| 750 | android::Mutex::Autolock autoLock(lock_); |
| 751 | return stopRequested_; |
| 752 | } |
| 753 | |
| 754 | bool AudioEngine::GetHasReachedPlayingBuffersLimit() { |
| 755 | android::Mutex::Autolock autoLock(playBufferLock_); |
| 756 | return playingBuffers_.size() >= maxPlayBufferCount_; |
| 757 | } |
| 758 | |
| 759 | void AudioEngine::EnqueueMoreAudioIfNecessary( |
| 760 | SLAndroidSimpleBufferQueueItf audioPlayerQueue) { |
| 761 | bool keepEnqueueing = true; |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 762 | while (audioPlayerQueue != NULL && |
| 763 | !GetWasStopRequested() && |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 764 | !IsDecodeBufferEmpty() && |
| 765 | !GetHasReachedPlayingBuffersLimit() && |
| 766 | keepEnqueueing) { |
| 767 | keepEnqueueing = EnqueueNextBufferOfAudio(audioPlayerQueue); |
| 768 | } |
| 769 | } |
| 770 | |
| 771 | bool AudioEngine::DecodeBufferTooFull() { |
| 772 | android::Mutex::Autolock autoLock(decodeBufferLock_); |
| 773 | return decodeBuffer_.IsTooLarge(); |
| 774 | } |
| 775 | |
| 776 | // **************************************************************************** |
| 777 | // Code for handling the static callbacks. |
| 778 | |
| 779 | void AudioEngine::PlayingBufferQueueCallback() { |
| 780 | // The head playing buffer is done, move it to the free list. |
| 781 | android::Mutex::Autolock autoLock(playBufferLock_); |
| 782 | if (playingBuffers_.size() > 0) { |
| 783 | freeBuffers_.push(playingBuffers_.front()); |
| 784 | playingBuffers_.pop(); |
| 785 | } |
| 786 | } |
| 787 | |
| 788 | void AudioEngine::PrefetchEventCallback( |
| 789 | SLPrefetchStatusItf caller, SLuint32 event) { |
| 790 | // If there was a problem during decoding, then signal the end. |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 791 | SLpermille level = 0; |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 792 | SLuint32 status; |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 793 | OpenSL(caller, GetFillLevel, &level); |
| 794 | OpenSL(caller, GetPrefetchStatus, &status); |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 795 | if ((kPrefetchErrorCandidate == (event & kPrefetchErrorCandidate)) && |
| 796 | (level == 0) && |
| 797 | (status == SL_PREFETCHSTATUS_UNDERFLOW)) { |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 798 | LOGI("prefetcheventcallback error while prefetching data"); |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 799 | SetEndOfDecoderReached(); |
| 800 | } |
| 801 | if (SL_PREFETCHSTATUS_SUFFICIENTDATA == event) { |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 802 | // android::Mutex::Autolock autoLock(prefetchLock_); |
| 803 | // prefetchCondition_.broadcast(); |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 804 | } |
| 805 | } |
| 806 | |
| 807 | void AudioEngine::DecodingBufferQueueCallback( |
| 808 | SLAndroidSimpleBufferQueueItf queueItf, void *context) { |
| 809 | if (GetWasStopRequested()) { |
| 810 | return; |
| 811 | } |
| 812 | |
| 813 | CallbackContext *pCntxt; |
| 814 | { |
| 815 | android::Mutex::Autolock autoLock(callbackLock_); |
| 816 | pCntxt = reinterpret_cast<CallbackContext*>(context); |
| 817 | } |
| 818 | { |
| 819 | android::Mutex::Autolock autoLock(decodeBufferLock_); |
Hugo Hudson | d2772c4 | 2011-08-27 01:21:54 +0100 | [diff] [blame] | 820 | decodeBuffer_.AddData(pCntxt->pData, kBufferSizeInBytes); |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 821 | } |
| 822 | |
Hugo Hudson | 0bd6ec5 | 2011-07-26 20:05:25 +0100 | [diff] [blame] | 823 | if (!HasSampleRateAndChannels()) { |
| 824 | android::Mutex::Autolock autoLock(callbackLock_); |
| 825 | ReadSampleRateAndChannelCount(pCntxt, &mSampleRate, &mChannels); |
| 826 | } |
| 827 | |
| 828 | { |
| 829 | android::Mutex::Autolock autoLock(lock_); |
| 830 | if (totalDurationMs_ == 0) { |
| 831 | totalDurationMs_ = ReadDuration(pCntxt->playItf); |
| 832 | } |
| 833 | // TODO: This isn't working, it always reports zero. |
| 834 | // ReadPosition(pCntxt->playItf); |
| 835 | } |
Hugo Hudson | 9730f15 | 2011-07-25 17:04:42 +0100 | [diff] [blame] | 836 | |
Hugo Hudson | d2772c4 | 2011-08-27 01:21:54 +0100 | [diff] [blame] | 837 | OpenSL(queueItf, Enqueue, pCntxt->pData, kBufferSizeInBytes); |
| 838 | |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 839 | // Increase data pointer by buffer size |
| 840 | pCntxt->pData += kBufferSizeInBytes; |
| 841 | if (pCntxt->pData >= pCntxt->pDataBase + |
| 842 | (kNumberOfBuffersInQueue * kBufferSizeInBytes)) { |
| 843 | pCntxt->pData = pCntxt->pDataBase; |
| 844 | } |
| 845 | |
Hugo Hudson | b83ad73 | 2011-07-14 23:31:17 +0100 | [diff] [blame] | 846 | // If we get too much data into the decoder, |
| 847 | // sleep until the playback catches up. |
| 848 | while (!GetWasStopRequested() && DecodeBufferTooFull()) { |
| 849 | usleep(kSleepTimeMicros); |
| 850 | } |
| 851 | } |
| 852 | |
| 853 | void AudioEngine::DecodingEventCallback(SLPlayItf, SLuint32 event) { |
| 854 | if (SL_PLAYEVENT_HEADATEND & event) { |
| 855 | SetEndOfDecoderReached(); |
| 856 | } |
| 857 | } |