MediaCodecSource.h revision 6d339f1f764bbd32e3381dae7bfa7c6c575bb493 
1/*
2 * Copyright (C) 2014 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 MediaCodecSource_H_
18#define MediaCodecSource_H_
19
20#include <media/stagefright/foundation/ABase.h>
21#include <media/stagefright/foundation/AHandlerReflector.h>
22#include <media/stagefright/MediaSource.h>
23
24namespace android {
25
26struct ALooper;
27class AMessage;
28struct AReplyToken;
29class IGraphicBufferProducer;
30class MediaCodec;
31class MetaData;
32
33struct MediaCodecSource : public MediaSource,
34                          public MediaBufferObserver {
35    enum FlagBits {
36        FLAG_USE_SURFACE_INPUT      = 1,
37        FLAG_USE_METADATA_INPUT     = 2,
38    };
39
40    static sp<MediaCodecSource> Create(
41            const sp<ALooper> &looper,
42            const sp<AMessage> &format,
43            const sp<MediaSource> &source,
44            uint32_t flags = 0);
45
46    bool isVideo() const { return mIsVideo; }
47    sp<IGraphicBufferProducer> getGraphicBufferProducer();
48
49    // MediaSource
50    virtual status_t start(MetaData *params = NULL);
51    virtual status_t stop();
52    virtual status_t pause();
53    virtual sp<MetaData> getFormat() { return mMeta; }
54    virtual status_t read(
55            MediaBuffer **buffer,
56            const ReadOptions *options = NULL);
57
58    // MediaBufferObserver
59    virtual void signalBufferReturned(MediaBuffer *buffer);
60
61    // for AHandlerReflector
62    void onMessageReceived(const sp<AMessage> &msg);
63
64protected:
65    virtual ~MediaCodecSource();
66
67private:
68    struct Puller;
69
70    enum {
71        kWhatPullerNotify,
72        kWhatEncoderActivity,
73        kWhatStart,
74        kWhatStop,
75        kWhatPause,
76    };
77
78    MediaCodecSource(
79            const sp<ALooper> &looper,
80            const sp<AMessage> &outputFormat,
81            const sp<MediaSource> &source,
82            uint32_t flags = 0);
83
84    status_t onStart(MetaData *params);
85    status_t init();
86    status_t initEncoder();
87    void releaseEncoder();
88    status_t feedEncoderInputBuffers();
89    void suspend();
90    void resume(int64_t skipFramesBeforeUs = -1ll);
91    void signalEOS(status_t err = ERROR_END_OF_STREAM);
92    bool reachedEOS();
93    status_t postSynchronouslyAndReturnError(const sp<AMessage> &msg);
94
95    sp<ALooper> mLooper;
96    sp<ALooper> mCodecLooper;
97    sp<AHandlerReflector<MediaCodecSource> > mReflector;
98    sp<AMessage> mOutputFormat;
99    sp<MetaData> mMeta;
100    sp<Puller> mPuller;
101    sp<MediaCodec> mEncoder;
102    uint32_t mFlags;
103    List<sp<AReplyToken>> mStopReplyIDQueue;
104    bool mIsVideo;
105    bool mStarted;
106    bool mStopping;
107    bool mDoMoreWorkPending;
108    sp<AMessage> mEncoderActivityNotify;
109    sp<IGraphicBufferProducer> mGraphicBufferProducer;
110    List<MediaBuffer *> mInputBufferQueue;
111    List<size_t> mAvailEncoderInputIndices;
112    List<int64_t> mDecodingTimeQueue; // decoding time (us) for video
113
114    // audio drift time
115    int64_t mFirstSampleTimeUs;
116    List<int64_t> mDriftTimeQueue;
117
118    // following variables are protected by mOutputBufferLock
119    Mutex mOutputBufferLock;
120    Condition mOutputBufferCond;
121    List<MediaBuffer*> mOutputBufferQueue;
122    bool mEncoderReachedEOS;
123    status_t mErrorCode;
124
125    DISALLOW_EVIL_CONSTRUCTORS(MediaCodecSource);
126};
127
128} // namespace android
129
130#endif /* MediaCodecSource_H_ */
131