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 #ifndef AUDIO_PLAYER_BASE_H_ 18 19 #define AUDIO_PLAYER_BASE_H_ 20 21 #include <media/MediaPlayerInterface.h> 22 #include <media/stagefright/MediaBuffer.h> 23 #include <media/stagefright/TimeSource.h> 24 #include <utils/threads.h> 25 26 namespace android { 27 28 class MediaSource; 29 class AudioTrack; 30 class PreviewPlayerBase; 31 32 class AudioPlayerBase : public TimeSource { 33 public: 34 enum { 35 REACHED_EOS, 36 SEEK_COMPLETE 37 }; 38 39 AudioPlayerBase(const sp<MediaPlayerBase::AudioSink> &audioSink, 40 PreviewPlayerBase *audioObserver = NULL); 41 42 virtual ~AudioPlayerBase(); 43 44 // Caller retains ownership of "source". 45 void setSource(const sp<MediaSource> &source); 46 47 // Return time in us. 48 virtual int64_t getRealTimeUs(); 49 50 status_t start(bool sourceAlreadyStarted = false); 51 52 void pause(bool playPendingSamples = false); 53 void resume(); 54 55 // Returns the timestamp of the last buffer played (in us). 56 int64_t getMediaTimeUs(); 57 58 // Returns true iff a mapping is established, i.e. the AudioPlayerBase 59 // has played at least one frame of audio. 60 bool getMediaTimeMapping(int64_t *realtime_us, int64_t *mediatime_us); 61 62 status_t seekTo(int64_t time_us); 63 64 bool isSeeking(); 65 bool reachedEOS(status_t *finalStatus); 66 67 private: 68 friend class VideoEditorAudioPlayer; 69 sp<MediaSource> mSource; 70 AudioTrack *mAudioTrack; 71 72 MediaBuffer *mInputBuffer; 73 74 int mSampleRate; 75 int64_t mLatencyUs; 76 size_t mFrameSize; 77 78 Mutex mLock; 79 int64_t mNumFramesPlayed; 80 81 int64_t mPositionTimeMediaUs; 82 int64_t mPositionTimeRealUs; 83 84 bool mSeeking; 85 bool mReachedEOS; 86 status_t mFinalStatus; 87 int64_t mSeekTimeUs; 88 89 bool mStarted; 90 91 bool mIsFirstBuffer; 92 status_t mFirstBufferResult; 93 MediaBuffer *mFirstBuffer; 94 95 sp<MediaPlayerBase::AudioSink> mAudioSink; 96 PreviewPlayerBase *mObserver; 97 98 static void AudioCallback(int event, void *user, void *info); 99 void AudioCallback(int event, void *info); 100 101 static size_t AudioSinkCallback( 102 MediaPlayerBase::AudioSink *audioSink, 103 void *data, size_t size, void *me); 104 105 size_t fillBuffer(void *data, size_t size); 106 107 int64_t getRealTimeUsLocked() const; 108 109 void reset(); 110 111 uint32_t getNumFramesPendingPlayout() const; 112 113 AudioPlayerBase(const AudioPlayerBase &); 114 AudioPlayerBase &operator=(const AudioPlayerBase &); 115 }; 116 117 } // namespace android 118 119 #endif // AUDIO_PLAYER_BASE_H_ 120