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      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 #ifndef AUDIO_PLAYER_H_
     18 
     19 #define AUDIO_PLAYER_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 AwesomePlayer;
     31 
     32 class AudioPlayer : public TimeSource {
     33 public:
     34     enum {
     35         REACHED_EOS,
     36         SEEK_COMPLETE
     37     };
     38 
     39     AudioPlayer(const sp<MediaPlayerBase::AudioSink> &audioSink,
     40                 AwesomePlayer *audioObserver = NULL);
     41 
     42     virtual ~AudioPlayer();
     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 AudioPlayer
     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     sp<MediaSource> mSource;
     69     AudioTrack *mAudioTrack;
     70 
     71     MediaBuffer *mInputBuffer;
     72 
     73     int mSampleRate;
     74     int64_t mLatencyUs;
     75     size_t mFrameSize;
     76 
     77     Mutex mLock;
     78     int64_t mNumFramesPlayed;
     79 
     80     int64_t mPositionTimeMediaUs;
     81     int64_t mPositionTimeRealUs;
     82 
     83     bool mSeeking;
     84     bool mReachedEOS;
     85     status_t mFinalStatus;
     86     int64_t mSeekTimeUs;
     87 
     88     bool mStarted;
     89 
     90     bool mIsFirstBuffer;
     91     status_t mFirstBufferResult;
     92     MediaBuffer *mFirstBuffer;
     93 
     94     sp<MediaPlayerBase::AudioSink> mAudioSink;
     95     AwesomePlayer *mObserver;
     96 
     97     static void AudioCallback(int event, void *user, void *info);
     98     void AudioCallback(int event, void *info);
     99 
    100     static size_t AudioSinkCallback(
    101             MediaPlayerBase::AudioSink *audioSink,
    102             void *data, size_t size, void *me);
    103 
    104     size_t fillBuffer(void *data, size_t size);
    105 
    106     int64_t getRealTimeUsLocked() const;
    107 
    108     void reset();
    109 
    110     AudioPlayer(const AudioPlayer &);
    111     AudioPlayer &operator=(const AudioPlayer &);
    112 };
    113 
    114 }  // namespace android
    115 
    116 #endif  // AUDIO_PLAYER_H_
    117