AudioPlayer.cpp revision 0c89199745bc1bf05b997fc7c342017807676b6f
1/* 2 * Copyright (C) 2009 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#define LOG_TAG "AudioPlayer" 18#include <utils/Log.h> 19 20#include <media/AudioTrack.h> 21#include <media/stagefright/AudioPlayer.h> 22#include <media/stagefright/MediaDebug.h> 23#include <media/stagefright/MediaSource.h> 24#include <media/stagefright/MetaData.h> 25 26namespace android { 27 28AudioPlayer::AudioPlayer(const sp<MediaPlayerBase::AudioSink> &audioSink) 29 : mAudioTrack(NULL), 30 mInputBuffer(NULL), 31 mSampleRate(0), 32 mLatencyUs(0), 33 mFrameSize(0), 34 mNumFramesPlayed(0), 35 mPositionTimeMediaUs(-1), 36 mPositionTimeRealUs(-1), 37 mSeeking(false), 38 mStarted(false), 39 mAudioSink(audioSink) { 40} 41 42AudioPlayer::~AudioPlayer() { 43 if (mStarted) { 44 stop(); 45 } 46} 47 48void AudioPlayer::setSource(const sp<MediaSource> &source) { 49 CHECK_EQ(mSource, NULL); 50 mSource = source; 51} 52 53void AudioPlayer::start() { 54 CHECK(!mStarted); 55 CHECK(mSource != NULL); 56 57 status_t err = mSource->start(); 58 CHECK_EQ(err, OK); 59 60 sp<MetaData> format = mSource->getFormat(); 61 const char *mime; 62 bool success = format->findCString(kKeyMIMEType, &mime); 63 CHECK(success); 64 CHECK(!strcasecmp(mime, "audio/raw")); 65 66 success = format->findInt32(kKeySampleRate, &mSampleRate); 67 CHECK(success); 68 69 int32_t numChannels; 70 success = format->findInt32(kKeyChannelCount, &numChannels); 71 CHECK(success); 72 73 if (mAudioSink.get() != NULL) { 74 status_t err = mAudioSink->open( 75 mSampleRate, numChannels, AudioSystem::PCM_16_BIT, 76 DEFAULT_AUDIOSINK_BUFFERCOUNT, 77 &AudioPlayer::AudioSinkCallback, this); 78 CHECK_EQ(err, OK); 79 80 mLatencyUs = (int64_t)mAudioSink->latency() * 1000; 81 mFrameSize = mAudioSink->frameSize(); 82 83 mAudioSink->start(); 84 } else { 85 mAudioTrack = new AudioTrack( 86 AudioSystem::MUSIC, mSampleRate, AudioSystem::PCM_16_BIT, 87 (numChannels == 2) 88 ? AudioSystem::CHANNEL_OUT_STEREO 89 : AudioSystem::CHANNEL_OUT_MONO, 90 8192, 0, &AudioCallback, this, 0); 91 92 CHECK_EQ(mAudioTrack->initCheck(), OK); 93 94 mLatencyUs = (int64_t)mAudioTrack->latency() * 1000; 95 mFrameSize = mAudioTrack->frameSize(); 96 97 mAudioTrack->start(); 98 } 99 100 mStarted = true; 101} 102 103void AudioPlayer::pause() { 104 CHECK(mStarted); 105 106 if (mAudioSink.get() != NULL) { 107 mAudioSink->pause(); 108 } else { 109 mAudioTrack->stop(); 110 } 111} 112 113void AudioPlayer::resume() { 114 CHECK(mStarted); 115 116 if (mAudioSink.get() != NULL) { 117 mAudioSink->start(); 118 } else { 119 mAudioTrack->start(); 120 } 121} 122 123void AudioPlayer::stop() { 124 CHECK(mStarted); 125 126 if (mAudioSink.get() != NULL) { 127 mAudioSink->stop(); 128 } else { 129 mAudioTrack->stop(); 130 131 delete mAudioTrack; 132 mAudioTrack = NULL; 133 } 134 135 // Make sure to release any buffer we hold onto so that the 136 // source is able to stop(). 137 if (mInputBuffer != NULL) { 138 LOGI("AudioPlayer releasing input buffer."); 139 140 mInputBuffer->release(); 141 mInputBuffer = NULL; 142 } 143 144 mSource->stop(); 145 146 mNumFramesPlayed = 0; 147 mPositionTimeMediaUs = -1; 148 mPositionTimeRealUs = -1; 149 mSeeking = false; 150 mStarted = false; 151} 152 153// static 154void AudioPlayer::AudioCallback(int event, void *user, void *info) { 155 static_cast<AudioPlayer *>(user)->AudioCallback(event, info); 156} 157 158// static 159void AudioPlayer::AudioSinkCallback( 160 MediaPlayerBase::AudioSink *audioSink, 161 void *buffer, size_t size, void *cookie) { 162 AudioPlayer *me = (AudioPlayer *)cookie; 163 164 me->fillBuffer(buffer, size); 165} 166 167void AudioPlayer::AudioCallback(int event, void *info) { 168 if (event != AudioTrack::EVENT_MORE_DATA) { 169 return; 170 } 171 172 AudioTrack::Buffer *buffer = (AudioTrack::Buffer *)info; 173 fillBuffer(buffer->raw, buffer->size); 174} 175 176void AudioPlayer::fillBuffer(void *data, size_t size) { 177 if (mNumFramesPlayed == 0) { 178 LOGI("AudioCallback"); 179 } 180 181 size_t size_done = 0; 182 size_t size_remaining = size; 183 while (size_remaining > 0) { 184 MediaSource::ReadOptions options; 185 186 { 187 Mutex::Autolock autoLock(mLock); 188 189 if (mSeeking) { 190 options.setSeekTo(mSeekTimeUs); 191 192 if (mInputBuffer != NULL) { 193 mInputBuffer->release(); 194 mInputBuffer = NULL; 195 } 196 mSeeking = false; 197 } 198 } 199 200 if (mInputBuffer == NULL) { 201 status_t err = mSource->read(&mInputBuffer, &options); 202 203 CHECK((err == OK && mInputBuffer != NULL) 204 || (err != OK && mInputBuffer == NULL)); 205 206 if (err != OK) { 207 memset((char *)data + size_done, 0, size_remaining); 208 break; 209 } 210 211 int32_t units, scale; 212 bool success = 213 mInputBuffer->meta_data()->findInt32(kKeyTimeUnits, &units); 214 success = success && 215 mInputBuffer->meta_data()->findInt32(kKeyTimeScale, &scale); 216 CHECK(success); 217 218 Mutex::Autolock autoLock(mLock); 219 mPositionTimeMediaUs = (int64_t)units * 1000000 / scale; 220 221 mPositionTimeRealUs = 222 ((mNumFramesPlayed + size_done / mFrameSize) * 1000000) 223 / mSampleRate; 224 } 225 226 if (mInputBuffer->range_length() == 0) { 227 mInputBuffer->release(); 228 mInputBuffer = NULL; 229 230 continue; 231 } 232 233 size_t copy = size_remaining; 234 if (copy > mInputBuffer->range_length()) { 235 copy = mInputBuffer->range_length(); 236 } 237 238 memcpy((char *)data + size_done, 239 (const char *)mInputBuffer->data() + mInputBuffer->range_offset(), 240 copy); 241 242 mInputBuffer->set_range(mInputBuffer->range_offset() + copy, 243 mInputBuffer->range_length() - copy); 244 245 size_done += copy; 246 size_remaining -= copy; 247 } 248 249 Mutex::Autolock autoLock(mLock); 250 mNumFramesPlayed += size / mFrameSize; 251} 252 253int64_t AudioPlayer::getRealTimeUs() { 254 Mutex::Autolock autoLock(mLock); 255 return getRealTimeUsLocked(); 256} 257 258int64_t AudioPlayer::getRealTimeUsLocked() const { 259 return -mLatencyUs + (mNumFramesPlayed * 1000000) / mSampleRate; 260} 261 262int64_t AudioPlayer::getMediaTimeUs() { 263 Mutex::Autolock autoLock(mLock); 264 265 return mPositionTimeMediaUs + (getRealTimeUsLocked() - mPositionTimeRealUs); 266} 267 268bool AudioPlayer::getMediaTimeMapping( 269 int64_t *realtime_us, int64_t *mediatime_us) { 270 Mutex::Autolock autoLock(mLock); 271 272 *realtime_us = mPositionTimeRealUs; 273 *mediatime_us = mPositionTimeMediaUs; 274 275 return mPositionTimeRealUs != -1 || mPositionTimeMediaUs != -1; 276} 277 278status_t AudioPlayer::seekTo(int64_t time_us) { 279 Mutex::Autolock autoLock(mLock); 280 281 mSeeking = true; 282 mSeekTimeUs = time_us; 283 284 return OK; 285} 286 287} 288