Wei Jia | 071a8b7 | 2015-03-09 16:38:25 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2015 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 | package android.media; |
| 18 | |
| 19 | import android.annotation.IntDef; |
Wei Jia | 217ec0a | 2015-04-09 18:48:18 -0700 | [diff] [blame] | 20 | import android.annotation.NonNull; |
Wei Jia | 071a8b7 | 2015-03-09 16:38:25 -0700 | [diff] [blame] | 21 | import android.media.AudioTrack; |
| 22 | import android.os.Handler; |
| 23 | import android.os.Looper; |
| 24 | import android.os.Message; |
| 25 | import android.view.Surface; |
| 26 | |
| 27 | import java.lang.annotation.Retention; |
| 28 | import java.lang.annotation.RetentionPolicy; |
| 29 | import java.nio.ByteBuffer; |
| 30 | import java.util.LinkedList; |
| 31 | import java.util.List; |
| 32 | |
| 33 | /** |
| 34 | * MediaSync class can be used to synchronously playback audio and video streams. |
| 35 | * It can be used to play audio-only or video-only stream, too. |
| 36 | * |
| 37 | * <p>MediaSync is generally used like this: |
| 38 | * <pre> |
| 39 | * MediaSync sync = new MediaSync(); |
| 40 | * sync.configureSurface(surface); |
| 41 | * Surface inputSurface = sync.createInputSurface(); |
| 42 | * ... |
| 43 | * // MediaCodec videoDecoder = ...; |
| 44 | * videoDecoder.configure(format, inputSurface, ...); |
| 45 | * ... |
Wei Jia | ba5997e5 | 2015-04-16 13:18:39 -0700 | [diff] [blame] | 46 | * sync.configureAudioTrack(audioTrack); |
Wei Jia | 071a8b7 | 2015-03-09 16:38:25 -0700 | [diff] [blame] | 47 | * sync.setCallback(new MediaSync.Callback() { |
Wei Jia | ba5997e5 | 2015-04-16 13:18:39 -0700 | [diff] [blame] | 48 | * {@literal @Override} |
Wei Jia | 071a8b7 | 2015-03-09 16:38:25 -0700 | [diff] [blame] | 49 | * public void onReturnAudioBuffer(MediaSync sync, ByteBuffer audioBuffer, int bufferIndex) { |
| 50 | * ... |
| 51 | * } |
Wei Jia | 161537c | 2015-04-20 17:28:58 -0700 | [diff] [blame] | 52 | * }, null); |
Wei Jia | 071a8b7 | 2015-03-09 16:38:25 -0700 | [diff] [blame] | 53 | * // This needs to be done since sync is paused on creation. |
| 54 | * sync.setPlaybackRate(1.0f, MediaSync.PLAYBACK_RATE_AUDIO_MODE_RESAMPLE); |
| 55 | * |
| 56 | * for (;;) { |
| 57 | * ... |
| 58 | * // send video frames to surface for rendering, e.g., call |
| 59 | * // videoDecoder.releaseOutputBuffer(videoOutputBufferIx, videoPresentationTimeNs); |
| 60 | * // More details are available as below. |
| 61 | * ... |
| 62 | * sync.queueAudio(audioByteBuffer, bufferIndex, size, audioPresentationTimeUs); // non-blocking. |
| 63 | * // The audioByteBuffer and bufferIndex will be returned via callback. |
| 64 | * // More details are available as below. |
| 65 | * ... |
| 66 | * ... |
| 67 | * } |
| 68 | * sync.setPlaybackRate(0.0f, MediaSync.PLAYBACK_RATE_AUDIO_MODE_RESAMPLE); |
| 69 | * sync.release(); |
| 70 | * sync = null; |
| 71 | * |
| 72 | * // The following code snippet illustrates how video/audio raw frames are created by |
| 73 | * // MediaCodec's, how they are fed to MediaSync and how they are returned by MediaSync. |
| 74 | * // This is the callback from MediaCodec. |
| 75 | * onOutputBufferAvailable(MediaCodec codec, int bufferIndex, BufferInfo info) { |
| 76 | * // ... |
| 77 | * if (codec == videoDecoder) { |
| 78 | * // surface timestamp must contain media presentation time in nanoseconds. |
| 79 | * codec.releaseOutputBuffer(bufferIndex, 1000 * info.presentationTime); |
| 80 | * } else { |
| 81 | * ByteBuffer audioByteBuffer = codec.getOutputBuffer(bufferIndex); |
| 82 | * sync.queueByteBuffer(audioByteBuffer, bufferIndex, info.size, info.presentationTime); |
| 83 | * } |
| 84 | * // ... |
| 85 | * } |
| 86 | * |
| 87 | * // This is the callback from MediaSync. |
| 88 | * onReturnAudioBuffer(MediaSync sync, ByteBuffer buffer, int bufferIndex) { |
| 89 | * // ... |
| 90 | * audioDecoder.releaseBuffer(bufferIndex, false); |
| 91 | * // ... |
| 92 | * } |
| 93 | * |
| 94 | * </pre> |
| 95 | * |
| 96 | * The client needs to configure corresponding sink (i.e., Surface and AudioTrack) based on |
| 97 | * the stream type it will play. |
| 98 | * <p> |
| 99 | * For video, the client needs to call {@link #createInputSurface} to obtain a surface on |
| 100 | * which it will render video frames. |
| 101 | * <p> |
| 102 | * For audio, the client needs to set up audio track correctly, e.g., using {@link |
| 103 | * AudioTrack#MODE_STREAM}. The audio buffers are sent to MediaSync directly via {@link |
| 104 | * #queueAudio}, and are returned to the client via {@link Callback#onReturnAudioBuffer} |
| 105 | * asynchronously. The client should not modify an audio buffer till it's returned. |
| 106 | * <p> |
| 107 | * The client can optionally pre-fill audio/video buffers by setting playback rate to 0.0, |
| 108 | * and then feed audio/video buffers to corresponding components. This can reduce possible |
| 109 | * initial underrun. |
| 110 | * <p> |
| 111 | */ |
| 112 | final public class MediaSync { |
| 113 | /** |
| 114 | * MediaSync callback interface. Used to notify the user asynchronously |
| 115 | * of various MediaSync events. |
| 116 | */ |
| 117 | public static abstract class Callback { |
| 118 | /** |
| 119 | * Called when returning an audio buffer which has been consumed. |
| 120 | * |
| 121 | * @param sync The MediaSync object. |
| 122 | * @param audioBuffer The returned audio buffer. |
| 123 | */ |
| 124 | public abstract void onReturnAudioBuffer( |
| 125 | MediaSync sync, ByteBuffer audioBuffer, int bufferIndex); |
| 126 | } |
| 127 | |
| 128 | private static final String TAG = "MediaSync"; |
| 129 | |
| 130 | private static final int EVENT_CALLBACK = 1; |
| 131 | private static final int EVENT_SET_CALLBACK = 2; |
| 132 | |
| 133 | private static final int CB_RETURN_AUDIO_BUFFER = 1; |
| 134 | |
| 135 | private static class AudioBuffer { |
| 136 | public ByteBuffer mByteBuffer; |
| 137 | public int mBufferIndex; |
| 138 | public int mSizeInBytes; |
| 139 | long mPresentationTimeUs; |
| 140 | |
| 141 | public AudioBuffer(ByteBuffer byteBuffer, int bufferIndex, |
| 142 | int sizeInBytes, long presentationTimeUs) { |
| 143 | mByteBuffer = byteBuffer; |
| 144 | mBufferIndex = bufferIndex; |
| 145 | mSizeInBytes = sizeInBytes; |
| 146 | mPresentationTimeUs = presentationTimeUs; |
| 147 | } |
| 148 | } |
| 149 | |
| 150 | private final Object mCallbackLock = new Object(); |
| 151 | private Handler mCallbackHandler = null; |
| 152 | private MediaSync.Callback mCallback = null; |
| 153 | |
Wei Jia | 071a8b7 | 2015-03-09 16:38:25 -0700 | [diff] [blame] | 154 | private Thread mAudioThread = null; |
| 155 | // Created on mAudioThread when mAudioThread is started. When used on user thread, they should |
| 156 | // be guarded by checking mAudioThread. |
| 157 | private Handler mAudioHandler = null; |
| 158 | private Looper mAudioLooper = null; |
| 159 | |
| 160 | private final Object mAudioLock = new Object(); |
| 161 | private AudioTrack mAudioTrack = null; |
| 162 | private List<AudioBuffer> mAudioBuffers = new LinkedList<AudioBuffer>(); |
| 163 | private float mPlaybackRate = 0.0f; |
| 164 | |
| 165 | private long mNativeContext; |
| 166 | |
| 167 | /** |
| 168 | * Class constructor. On creation, MediaSync is paused, i.e., playback rate is 0.0f. |
| 169 | */ |
| 170 | public MediaSync() { |
| 171 | native_setup(); |
| 172 | } |
| 173 | |
| 174 | private native final void native_setup(); |
| 175 | |
| 176 | @Override |
| 177 | protected void finalize() { |
| 178 | native_finalize(); |
| 179 | } |
| 180 | |
| 181 | private native final void native_finalize(); |
| 182 | |
| 183 | /** |
| 184 | * Make sure you call this when you're done to free up any opened |
| 185 | * component instance instead of relying on the garbage collector |
| 186 | * to do this for you at some point in the future. |
| 187 | */ |
| 188 | public final void release() { |
| 189 | returnAudioBuffers(); |
| 190 | if (mAudioThread != null) { |
| 191 | if (mAudioLooper != null) { |
| 192 | mAudioLooper.quit(); |
| 193 | } |
| 194 | } |
| 195 | setCallback(null, null); |
| 196 | native_release(); |
| 197 | } |
| 198 | |
| 199 | private native final void native_release(); |
| 200 | |
| 201 | /** |
| 202 | * Sets an asynchronous callback for actionable MediaSync events. |
| 203 | * It shouldn't be called inside callback. |
| 204 | * |
| 205 | * @param cb The callback that will run. |
| 206 | * @param handler The Handler that will run the callback. Using null means to use MediaSync's |
| 207 | * internal handler if it exists. |
| 208 | */ |
| 209 | public void setCallback(/* MediaSync. */ Callback cb, Handler handler) { |
| 210 | synchronized(mCallbackLock) { |
| 211 | if (handler != null) { |
| 212 | mCallbackHandler = handler; |
| 213 | } else { |
| 214 | Looper looper; |
| 215 | if ((looper = Looper.myLooper()) == null) { |
| 216 | looper = Looper.getMainLooper(); |
| 217 | } |
| 218 | if (looper == null) { |
| 219 | mCallbackHandler = null; |
| 220 | } else { |
| 221 | mCallbackHandler = new Handler(looper); |
| 222 | } |
| 223 | } |
| 224 | |
| 225 | mCallback = cb; |
| 226 | } |
| 227 | } |
| 228 | |
| 229 | /** |
| 230 | * Configures the output surface for MediaSync. |
| 231 | * |
| 232 | * @param surface Specify a surface on which to render the video data. |
| 233 | * @throws IllegalArgumentException if the surface has been released, or is invalid. |
| 234 | * or can not be connected. |
| 235 | * @throws IllegalStateException if not in the Initialized state, or another surface |
| 236 | * has already been configured. |
| 237 | */ |
| 238 | public void configureSurface(Surface surface) { |
| 239 | native_configureSurface(surface); |
| 240 | } |
| 241 | |
| 242 | private native final void native_configureSurface(Surface surface); |
| 243 | |
| 244 | /** |
| 245 | * Configures the audio track for MediaSync. |
| 246 | * |
| 247 | * @param audioTrack Specify an AudioTrack through which to render the audio data. |
Wei Jia | ba5997e5 | 2015-04-16 13:18:39 -0700 | [diff] [blame] | 248 | * @throws IllegalArgumentException if the audioTrack has been released, or is invalid. |
Wei Jia | 071a8b7 | 2015-03-09 16:38:25 -0700 | [diff] [blame] | 249 | * @throws IllegalStateException if not in the Initialized state, or another audio track |
| 250 | * has already been configured. |
| 251 | */ |
Wei Jia | ba5997e5 | 2015-04-16 13:18:39 -0700 | [diff] [blame] | 252 | public void configureAudioTrack(AudioTrack audioTrack) { |
| 253 | // AudioTrack has sanity check for configured sample rate. |
| 254 | int nativeSampleRateInHz = (audioTrack == null ? 0 : audioTrack.getSampleRate()); |
| 255 | |
Wei Jia | 071a8b7 | 2015-03-09 16:38:25 -0700 | [diff] [blame] | 256 | native_configureAudioTrack(audioTrack, nativeSampleRateInHz); |
| 257 | mAudioTrack = audioTrack; |
Wei Jia | ba5997e5 | 2015-04-16 13:18:39 -0700 | [diff] [blame] | 258 | if (audioTrack != null && mAudioThread == null) { |
Wei Jia | 071a8b7 | 2015-03-09 16:38:25 -0700 | [diff] [blame] | 259 | createAudioThread(); |
| 260 | } |
| 261 | } |
| 262 | |
| 263 | private native final void native_configureAudioTrack( |
| 264 | AudioTrack audioTrack, int nativeSampleRateInHz); |
| 265 | |
| 266 | /** |
| 267 | * Requests a Surface to use as the input. This may only be called after |
| 268 | * {@link #configureSurface}. |
| 269 | * <p> |
| 270 | * The application is responsible for calling release() on the Surface when |
| 271 | * done. |
| 272 | * @throws IllegalStateException if not configured, or another input surface has |
| 273 | * already been created. |
| 274 | */ |
| 275 | public native final Surface createInputSurface(); |
| 276 | |
| 277 | /** |
| 278 | * Specifies resampling as audio mode for variable rate playback, i.e., |
| 279 | * resample the waveform based on the requested playback rate to get |
| 280 | * a new waveform, and play back the new waveform at the original sampling |
| 281 | * frequency. |
| 282 | * When rate is larger than 1.0, pitch becomes higher. |
| 283 | * When rate is smaller than 1.0, pitch becomes lower. |
| 284 | */ |
| 285 | public static final int PLAYBACK_RATE_AUDIO_MODE_RESAMPLE = 0; |
| 286 | |
| 287 | /** |
| 288 | * Specifies time stretching as audio mode for variable rate playback. |
| 289 | * Time stretching changes the duration of the audio samples without |
| 290 | * affecting its pitch. |
| 291 | * FIXME: implement time strectching. |
| 292 | * @hide |
| 293 | */ |
| 294 | public static final int PLAYBACK_RATE_AUDIO_MODE_STRETCH = 1; |
| 295 | |
| 296 | /** @hide */ |
| 297 | @IntDef( |
| 298 | value = { |
| 299 | PLAYBACK_RATE_AUDIO_MODE_RESAMPLE, |
| 300 | PLAYBACK_RATE_AUDIO_MODE_STRETCH }) |
| 301 | @Retention(RetentionPolicy.SOURCE) |
| 302 | public @interface PlaybackRateAudioMode {} |
| 303 | |
| 304 | /** |
| 305 | * Sets playback rate. It does same as {@link #setPlaybackRate(float, int)}, |
| 306 | * except that it always uses {@link #PLAYBACK_RATE_AUDIO_MODE_STRETCH} for audioMode. |
| 307 | * |
| 308 | * @param rate the ratio between desired playback rate and normal one. 1.0 means normal |
| 309 | * playback speed. 0.0 means stop or pause. Value larger than 1.0 means faster playback, |
| 310 | * while value between 0.0 and 1.0 for slower playback. |
| 311 | * |
| 312 | * @throws IllegalStateException if the internal sync engine or the audio track has not |
| 313 | * been initialized. |
| 314 | * TODO: unhide when PLAYBACK_RATE_AUDIO_MODE_STRETCH is supported. |
| 315 | * @hide |
| 316 | */ |
| 317 | public void setPlaybackRate(float rate) { |
| 318 | setPlaybackRate(rate, PLAYBACK_RATE_AUDIO_MODE_STRETCH); |
| 319 | } |
| 320 | |
| 321 | /** |
| 322 | * Sets playback rate and audio mode. |
| 323 | * |
| 324 | * <p> The supported audio modes are: |
| 325 | * <ul> |
| 326 | * <li> {@link #PLAYBACK_RATE_AUDIO_MODE_RESAMPLE} |
| 327 | * </ul> |
| 328 | * |
| 329 | * @param rate the ratio between desired playback rate and normal one. 1.0 means normal |
| 330 | * playback speed. 0.0 means stop or pause. Value larger than 1.0 means faster playback, |
| 331 | * while value between 0.0 and 1.0 for slower playback. |
| 332 | * @param audioMode audio playback mode. Must be one of the supported |
| 333 | * audio modes. |
| 334 | * |
| 335 | * @throws IllegalStateException if the internal sync engine or the audio track has not |
| 336 | * been initialized. |
| 337 | * @throws IllegalArgumentException if audioMode is not supported. |
| 338 | */ |
| 339 | public void setPlaybackRate(float rate, @PlaybackRateAudioMode int audioMode) { |
| 340 | if (!isAudioPlaybackModeSupported(audioMode)) { |
| 341 | final String msg = "Audio playback mode " + audioMode + " is not supported"; |
| 342 | throw new IllegalArgumentException(msg); |
| 343 | } |
| 344 | |
| 345 | int status = AudioTrack.SUCCESS; |
| 346 | if (mAudioTrack != null) { |
Wei Jia | ba5997e5 | 2015-04-16 13:18:39 -0700 | [diff] [blame] | 347 | int nativeSampleRateInHz = mAudioTrack.getSampleRate(); |
| 348 | int playbackSampleRate = (int)(rate * nativeSampleRateInHz + 0.5); |
| 349 | rate = playbackSampleRate / (float)nativeSampleRateInHz; |
Wei Jia | 071a8b7 | 2015-03-09 16:38:25 -0700 | [diff] [blame] | 350 | |
| 351 | try { |
| 352 | if (rate == 0.0) { |
| 353 | mAudioTrack.pause(); |
| 354 | } else { |
| 355 | status = mAudioTrack.setPlaybackRate(playbackSampleRate); |
| 356 | mAudioTrack.play(); |
| 357 | } |
| 358 | } catch (IllegalStateException e) { |
| 359 | throw e; |
| 360 | } |
| 361 | } |
| 362 | |
| 363 | if (status != AudioTrack.SUCCESS) { |
| 364 | throw new IllegalArgumentException("Fail to set playback rate in audio track"); |
| 365 | } |
| 366 | |
| 367 | synchronized(mAudioLock) { |
| 368 | mPlaybackRate = rate; |
| 369 | } |
| 370 | if (mPlaybackRate != 0.0 && mAudioThread != null) { |
| 371 | postRenderAudio(0); |
| 372 | } |
| 373 | native_setPlaybackRate(mPlaybackRate); |
| 374 | } |
| 375 | |
| 376 | private native final void native_setPlaybackRate(float rate); |
| 377 | |
| 378 | /* |
| 379 | * Test whether a given audio playback mode is supported. |
| 380 | * TODO query supported AudioPlaybackMode from audio track. |
| 381 | */ |
| 382 | private boolean isAudioPlaybackModeSupported(int mode) { |
| 383 | return (mode == PLAYBACK_RATE_AUDIO_MODE_RESAMPLE); |
| 384 | } |
| 385 | |
Wei Jia | 217ec0a | 2015-04-09 18:48:18 -0700 | [diff] [blame] | 386 | /** |
| 387 | * Get current playback position. |
| 388 | * <p> |
| 389 | * The MediaTimestamp represents a clock ticking during media playback. It's represented |
| 390 | * by an anchor frame ({@link MediaTimestamp#mediaTimeUs} and {@link MediaTimestamp#nanoTime}) |
| 391 | * and clock speed ({@link MediaTimestamp#clockRate}). For continous playback with |
| 392 | * constant speed, its anchor frame doesn't change that often. Thereafter, it's recommended |
| 393 | * to not call this method often. |
| 394 | * <p> |
| 395 | * To help users to get current playback position, this method always returns the timestamp of |
| 396 | * just-rendered frame, i.e., {@link System#nanoTime} and its corresponding media time. They |
| 397 | * can be used as current playback position. |
| 398 | * |
| 399 | * @param timestamp a reference to a non-null MediaTimestamp instance allocated |
| 400 | * and owned by caller. |
| 401 | * @return true if a timestamp is available, or false if no timestamp is available. |
| 402 | * If a timestamp if available, the MediaTimestamp instance is filled in with |
| 403 | * playback rate, together with the current media timestamp and the system nanoTime |
| 404 | * corresponding to the measured media timestamp. |
| 405 | * In the case that no timestamp is available, any supplied instance is left unaltered. |
| 406 | */ |
| 407 | public boolean getTimestamp(@NonNull MediaTimestamp timestamp) |
| 408 | { |
| 409 | if (timestamp == null) { |
| 410 | throw new IllegalArgumentException(); |
| 411 | } |
| 412 | return native_getTimestamp(timestamp); |
| 413 | } |
| 414 | |
| 415 | private native final boolean native_getTimestamp(MediaTimestamp timestamp); |
| 416 | |
Wei Jia | 071a8b7 | 2015-03-09 16:38:25 -0700 | [diff] [blame] | 417 | /** |
| 418 | * Queues the audio data asynchronously for playback (AudioTrack must be in streaming mode). |
| 419 | * @param audioData the buffer that holds the data to play. This buffer will be returned |
| 420 | * to the client via registered callback. |
| 421 | * @param bufferIndex the buffer index used to identify audioData. It will be returned to |
| 422 | * the client along with audioData. This helps applications to keep track of audioData. |
| 423 | * @param sizeInBytes number of bytes to queue. |
| 424 | * @param presentationTimeUs the presentation timestamp in microseconds for the first frame |
| 425 | * in the buffer. |
| 426 | * @throws IllegalStateException if audio track is not configured or internal configureation |
| 427 | * has not been done correctly. |
| 428 | */ |
| 429 | public void queueAudio( |
| 430 | ByteBuffer audioData, int bufferIndex, int sizeInBytes, long presentationTimeUs) { |
| 431 | if (mAudioTrack == null || mAudioThread == null) { |
| 432 | throw new IllegalStateException( |
| 433 | "AudioTrack is NOT configured or audio thread is not created"); |
| 434 | } |
| 435 | |
| 436 | synchronized(mAudioLock) { |
| 437 | mAudioBuffers.add(new AudioBuffer( |
| 438 | audioData, bufferIndex, sizeInBytes, presentationTimeUs)); |
| 439 | } |
| 440 | |
| 441 | if (mPlaybackRate != 0.0) { |
| 442 | postRenderAudio(0); |
| 443 | } |
| 444 | } |
| 445 | |
| 446 | // When called on user thread, make sure to check mAudioThread != null. |
| 447 | private void postRenderAudio(long delayMillis) { |
| 448 | mAudioHandler.postDelayed(new Runnable() { |
| 449 | public void run() { |
| 450 | synchronized(mAudioLock) { |
| 451 | if (mPlaybackRate == 0.0) { |
| 452 | return; |
| 453 | } |
| 454 | |
| 455 | if (mAudioBuffers.isEmpty()) { |
| 456 | return; |
| 457 | } |
| 458 | |
| 459 | AudioBuffer audioBuffer = mAudioBuffers.get(0); |
| 460 | int sizeWritten = mAudioTrack.write( |
| 461 | audioBuffer.mByteBuffer, |
| 462 | audioBuffer.mSizeInBytes, |
| 463 | AudioTrack.WRITE_NON_BLOCKING); |
| 464 | if (sizeWritten > 0) { |
| 465 | if (audioBuffer.mPresentationTimeUs != -1) { |
| 466 | native_updateQueuedAudioData( |
| 467 | audioBuffer.mSizeInBytes, audioBuffer.mPresentationTimeUs); |
| 468 | audioBuffer.mPresentationTimeUs = -1; |
| 469 | } |
| 470 | |
| 471 | if (sizeWritten == audioBuffer.mSizeInBytes) { |
| 472 | postReturnByteBuffer(audioBuffer); |
| 473 | mAudioBuffers.remove(0); |
| 474 | if (!mAudioBuffers.isEmpty()) { |
| 475 | postRenderAudio(0); |
| 476 | } |
| 477 | return; |
| 478 | } |
| 479 | |
| 480 | audioBuffer.mSizeInBytes -= sizeWritten; |
| 481 | } |
| 482 | // TODO: wait time depends on fullness of audio track. |
| 483 | postRenderAudio(10); |
| 484 | } |
| 485 | } |
| 486 | }, delayMillis); |
| 487 | } |
| 488 | |
| 489 | private native final void native_updateQueuedAudioData( |
| 490 | int sizeInBytes, long presentationTimeUs); |
| 491 | |
| 492 | private final void postReturnByteBuffer(final AudioBuffer audioBuffer) { |
| 493 | synchronized(mCallbackLock) { |
| 494 | if (mCallbackHandler != null) { |
| 495 | final MediaSync sync = this; |
| 496 | mCallbackHandler.post(new Runnable() { |
| 497 | public void run() { |
| 498 | synchronized(mCallbackLock) { |
| 499 | if (mCallbackHandler == null |
| 500 | || mCallbackHandler.getLooper().getThread() |
| 501 | != Thread.currentThread()) { |
| 502 | // callback handler has been changed. |
| 503 | return; |
| 504 | } |
| 505 | if (mCallback != null) { |
| 506 | mCallback.onReturnAudioBuffer(sync, audioBuffer.mByteBuffer, |
| 507 | audioBuffer.mBufferIndex); |
| 508 | } |
| 509 | } |
| 510 | } |
| 511 | }); |
| 512 | } |
| 513 | } |
| 514 | } |
| 515 | |
| 516 | private final void returnAudioBuffers() { |
| 517 | synchronized(mAudioLock) { |
| 518 | for (AudioBuffer audioBuffer: mAudioBuffers) { |
| 519 | postReturnByteBuffer(audioBuffer); |
| 520 | } |
| 521 | mAudioBuffers.clear(); |
| 522 | } |
| 523 | } |
| 524 | |
| 525 | private void createAudioThread() { |
| 526 | mAudioThread = new Thread() { |
| 527 | @Override |
| 528 | public void run() { |
| 529 | Looper.prepare(); |
| 530 | synchronized(mAudioLock) { |
| 531 | mAudioLooper = Looper.myLooper(); |
| 532 | mAudioHandler = new Handler(); |
| 533 | mAudioLock.notify(); |
| 534 | } |
| 535 | Looper.loop(); |
| 536 | } |
| 537 | }; |
| 538 | mAudioThread.start(); |
| 539 | |
| 540 | synchronized(mAudioLock) { |
| 541 | try { |
| 542 | mAudioLock.wait(); |
| 543 | } catch(InterruptedException e) { |
| 544 | } |
| 545 | } |
| 546 | } |
| 547 | |
| 548 | static { |
| 549 | System.loadLibrary("media_jni"); |
| 550 | native_init(); |
| 551 | } |
| 552 | |
| 553 | private static native final void native_init(); |
| 554 | } |