NuPlayerRenderer.h revision 259f1624cf7b93ba831af10a616267487601c27f 
1/*
2 * Copyright (C) 2010 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 NUPLAYER_RENDERER_H_
18
19#define NUPLAYER_RENDERER_H_
20
21#include "NuPlayer.h"
22
23namespace android {
24
25struct ABuffer;
26
27struct NuPlayer::Renderer : public AHandler {
28    enum Flags {
29        FLAG_REAL_TIME = 1,
30    };
31    Renderer(const sp<MediaPlayerBase::AudioSink> &sink,
32             const sp<AMessage> &notify,
33             uint32_t flags = 0);
34
35    void queueBuffer(
36            bool audio,
37            const sp<ABuffer> &buffer,
38            const sp<AMessage> &notifyConsumed);
39
40    void queueEOS(bool audio, status_t finalResult);
41
42    void flush(bool audio);
43
44    void signalTimeDiscontinuity();
45
46    void signalAudioSinkChanged();
47
48    void pause();
49    void resume();
50
51    enum {
52        kWhatEOS                 = 'eos ',
53        kWhatFlushComplete       = 'fluC',
54        kWhatPosition            = 'posi',
55        kWhatVideoRenderingStart = 'vdrd',
56        kWhatMediaRenderingStart = 'mdrd',
57    };
58
59protected:
60    virtual ~Renderer();
61
62    virtual void onMessageReceived(const sp<AMessage> &msg);
63
64private:
65    enum {
66        kWhatDrainAudioQueue    = 'draA',
67        kWhatDrainVideoQueue    = 'draV',
68        kWhatQueueBuffer        = 'queB',
69        kWhatQueueEOS           = 'qEOS',
70        kWhatFlush              = 'flus',
71        kWhatAudioSinkChanged   = 'auSC',
72        kWhatPause              = 'paus',
73        kWhatResume             = 'resm',
74    };
75
76    struct QueueEntry {
77        sp<ABuffer> mBuffer;
78        sp<AMessage> mNotifyConsumed;
79        size_t mOffset;
80        status_t mFinalResult;
81    };
82
83    static const int64_t kMinPositionUpdateDelayUs;
84
85    sp<MediaPlayerBase::AudioSink> mAudioSink;
86    sp<AMessage> mNotify;
87    uint32_t mFlags;
88    List<QueueEntry> mAudioQueue;
89    List<QueueEntry> mVideoQueue;
90    uint32_t mNumFramesWritten;
91
92    bool mDrainAudioQueuePending;
93    bool mDrainVideoQueuePending;
94    int32_t mAudioQueueGeneration;
95    int32_t mVideoQueueGeneration;
96
97    int64_t mAnchorTimeMediaUs;
98    int64_t mAnchorTimeRealUs;
99
100    Mutex mFlushLock;  // protects the following 2 member vars.
101    bool mFlushingAudio;
102    bool mFlushingVideo;
103
104    bool mHasAudio;
105    bool mHasVideo;
106    bool mSyncQueues;
107
108    bool mPaused;
109    bool mVideoRenderingStarted;
110    int32_t mVideoRenderingStartGeneration;
111    int32_t mAudioRenderingStartGeneration;
112
113    int64_t mLastPositionUpdateUs;
114    int64_t mVideoLateByUs;
115
116    bool onDrainAudioQueue();
117    void postDrainAudioQueue(int64_t delayUs = 0);
118
119    void onDrainVideoQueue();
120    void postDrainVideoQueue();
121
122    void prepareForMediaRenderingStart();
123    void notifyIfMediaRenderingStarted();
124
125    void onQueueBuffer(const sp<AMessage> &msg);
126    void onQueueEOS(const sp<AMessage> &msg);
127    void onFlush(const sp<AMessage> &msg);
128    void onAudioSinkChanged();
129    void onPause();
130    void onResume();
131
132    void notifyEOS(bool audio, status_t finalResult);
133    void notifyFlushComplete(bool audio);
134    void notifyPosition();
135    void notifyVideoLateBy(int64_t lateByUs);
136    void notifyVideoRenderingStart();
137
138    void flushQueue(List<QueueEntry> *queue);
139    bool dropBufferWhileFlushing(bool audio, const sp<AMessage> &msg);
140    void syncQueuesDone();
141
142    DISALLOW_EVIL_CONSTRUCTORS(Renderer);
143};
144
145}  // namespace android
146
147#endif  // NUPLAYER_RENDERER_H_
148