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 IGraphicBufferConsumer;
31class MediaCodec;
32class MetaData;
33
34struct MediaCodecSource : public MediaSource,
35                          public MediaBufferObserver {
36    enum FlagBits {
37        FLAG_USE_SURFACE_INPUT      = 1,
38        FLAG_USE_METADATA_INPUT     = 2,
39    };
40
41    static sp<MediaCodecSource> Create(
42            const sp<ALooper> &looper,
43            const sp<AMessage> &format,
44            const sp<MediaSource> &source,
45            const sp<IGraphicBufferConsumer> &consumer = NULL,
46            uint32_t flags = 0);
47
48    bool isVideo() const { return mIsVideo; }
49    sp<IGraphicBufferProducer> getGraphicBufferProducer();
50
51    // MediaSource
52    virtual status_t start(MetaData *params = NULL);
53    virtual status_t stop();
54    virtual status_t pause();
55    virtual sp<MetaData> getFormat() { return mMeta; }
56    virtual status_t read(
57            MediaBuffer **buffer,
58            const ReadOptions *options = NULL);
59
60    // MediaBufferObserver
61    virtual void signalBufferReturned(MediaBuffer *buffer);
62
63    // for AHandlerReflector
64    void onMessageReceived(const sp<AMessage> &msg);
65
66protected:
67    virtual ~MediaCodecSource();
68
69private:
70    struct Puller;
71
72    enum {
73        kWhatPullerNotify,
74        kWhatEncoderActivity,
75        kWhatStart,
76        kWhatStop,
77        kWhatPause,
78    };
79
80    MediaCodecSource(
81            const sp<ALooper> &looper,
82            const sp<AMessage> &outputFormat,
83            const sp<MediaSource> &source,
84            const sp<IGraphicBufferConsumer> &consumer,
85            uint32_t flags = 0);
86
87    status_t onStart(MetaData *params);
88    status_t init();
89    status_t initEncoder();
90    void releaseEncoder();
91    status_t feedEncoderInputBuffers();
92    void suspend();
93    void resume(int64_t skipFramesBeforeUs = -1ll);
94    void signalEOS(status_t err = ERROR_END_OF_STREAM);
95    bool reachedEOS();
96    status_t postSynchronouslyAndReturnError(const sp<AMessage> &msg);
97
98    sp<ALooper> mLooper;
99    sp<ALooper> mCodecLooper;
100    sp<AHandlerReflector<MediaCodecSource> > mReflector;
101    sp<AMessage> mOutputFormat;
102    sp<MetaData> mMeta;
103    sp<Puller> mPuller;
104    sp<MediaCodec> mEncoder;
105    uint32_t mFlags;
106    List<sp<AReplyToken>> mStopReplyIDQueue;
107    bool mIsVideo;
108    bool mStarted;
109    bool mStopping;
110    bool mDoMoreWorkPending;
111    bool mSetEncoderFormat;
112    int mEncoderFormat;
113    int mEncoderDataSpace;
114    sp<AMessage> mEncoderActivityNotify;
115    sp<IGraphicBufferProducer> mGraphicBufferProducer;
116    sp<IGraphicBufferConsumer> mGraphicBufferConsumer;
117    List<MediaBuffer *> mInputBufferQueue;
118    List<size_t> mAvailEncoderInputIndices;
119    List<int64_t> mDecodingTimeQueue; // decoding time (us) for video
120
121    // audio drift time
122    int64_t mFirstSampleTimeUs;
123    List<int64_t> mDriftTimeQueue;
124
125    // following variables are protected by mOutputBufferLock
126    Mutex mOutputBufferLock;
127    Condition mOutputBufferCond;
128    List<MediaBuffer*> mOutputBufferQueue;
129    bool mEncoderReachedEOS;
130    status_t mErrorCode;
131
132    DISALLOW_EVIL_CONSTRUCTORS(MediaCodecSource);
133};
134
135} // namespace android
136
137#endif /* MediaCodecSource_H_ */
138