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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/MediaSource.h>
     22 #include <media/MediaPlayerInterface.h>
     23 #include <media/stagefright/MediaBuffer.h>
     24 #include <utils/threads.h>
     25 
     26 namespace android {
     27 
     28 struct AudioPlaybackRate;
     29 class AudioTrack;
     30 struct AwesomePlayer;
     31 
     32 class AudioPlayer {
     33 public:
     34     enum {
     35         REACHED_EOS,
     36         SEEK_COMPLETE
     37     };
     38 
     39     enum {
     40         ALLOW_DEEP_BUFFERING = 0x01,
     41         USE_OFFLOAD = 0x02,
     42         HAS_VIDEO   = 0x1000,
     43         IS_STREAMING = 0x2000
     44 
     45     };
     46 
     47     AudioPlayer(const sp<MediaPlayerBase::AudioSink> &audioSink,
     48                 uint32_t flags = 0);
     49 
     50     virtual ~AudioPlayer();
     51 
     52     // Caller retains ownership of "source".
     53     void setSource(const sp<MediaSource> &source);
     54 
     55     status_t start(bool sourceAlreadyStarted = false);
     56 
     57     void pause(bool playPendingSamples = false);
     58     status_t resume();
     59 
     60     status_t seekTo(int64_t time_us);
     61 
     62     bool isSeeking();
     63     bool reachedEOS(status_t *finalStatus);
     64 
     65     status_t setPlaybackRate(const AudioPlaybackRate &rate);
     66     status_t getPlaybackRate(AudioPlaybackRate *rate /* nonnull */);
     67 
     68 private:
     69     sp<MediaSource> mSource;
     70     sp<AudioTrack> mAudioTrack;
     71 
     72     MediaBufferBase *mInputBuffer;
     73 
     74     int mSampleRate;
     75     int64_t mLatencyUs;
     76     size_t mFrameSize;
     77 
     78     Mutex mLock;
     79     int64_t mNumFramesPlayed;
     80     int64_t mNumFramesPlayedSysTimeUs;
     81 
     82     int64_t mPositionTimeMediaUs;
     83     int64_t mPositionTimeRealUs;
     84 
     85     bool mSeeking;
     86     bool mReachedEOS;
     87     status_t mFinalStatus;
     88     int64_t mSeekTimeUs;
     89 
     90     bool mStarted;
     91 
     92     bool mIsFirstBuffer;
     93     status_t mFirstBufferResult;
     94     MediaBufferBase *mFirstBuffer;
     95 
     96     sp<MediaPlayerBase::AudioSink> mAudioSink;
     97 
     98     bool mPlaying;
     99     int64_t mStartPosUs;
    100     const uint32_t mCreateFlags;
    101 
    102     static void AudioCallback(int event, void *user, void *info);
    103     void AudioCallback(int event, void *info);
    104 
    105     static size_t AudioSinkCallback(
    106             MediaPlayerBase::AudioSink *audioSink,
    107             void *data, size_t size, void *me,
    108             MediaPlayerBase::AudioSink::cb_event_t event);
    109 
    110     size_t fillBuffer(void *data, size_t size);
    111 
    112     void reset();
    113 
    114     int64_t getOutputPlayPositionUs_l();
    115 
    116     bool allowDeepBuffering() const { return (mCreateFlags & ALLOW_DEEP_BUFFERING) != 0; }
    117     bool useOffload() const { return (mCreateFlags & USE_OFFLOAD) != 0; }
    118 
    119     AudioPlayer(const AudioPlayer &);
    120     AudioPlayer &operator=(const AudioPlayer &);
    121 };
    122 
    123 }  // namespace android
    124 
    125 #endif  // AUDIO_PLAYER_H_
    126