NuPlayerDecoderPassThrough.h revision c5cc2e21602182c7ab4df1d7eba40f18037c1818 
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 NUPLAYER_DECODER_PASS_THROUGH_H_
18
19#define NUPLAYER_DECODER_PASS_THROUGH_H_
20
21#include "NuPlayer.h"
22
23#include "NuPlayerDecoder.h"
24
25namespace android {
26
27struct NuPlayer::DecoderPassThrough : public Decoder {
28    DecoderPassThrough(const sp<AMessage> &notify);
29
30    virtual void configure(const sp<AMessage> &format);
31    virtual void init();
32
33    virtual void signalFlush();
34    virtual void signalResume();
35    virtual void initiateShutdown();
36
37    bool supportsSeamlessFormatChange(const sp<AMessage> &to) const;
38
39protected:
40
41    virtual ~DecoderPassThrough();
42
43    virtual void onMessageReceived(const sp<AMessage> &msg);
44
45private:
46    enum {
47        kWhatRequestABuffer     = 'reqB',
48        kWhatConfigure          = 'conf',
49        kWhatInputBufferFilled  = 'inpF',
50        kWhatBufferConsumed     = 'bufC',
51        kWhatFlush              = 'flus',
52        kWhatShutdown           = 'shuD',
53    };
54
55    sp<AMessage> mNotify;
56    sp<ALooper> mDecoderLooper;
57
58    /** Returns true if a buffer was requested.
59     * Returns false if at EOS or cache already full.
60     */
61    bool requestABuffer();
62    bool isStaleReply(const sp<AMessage> &msg);
63
64    void onConfigure(const sp<AMessage> &format);
65    void onFlush();
66    void onInputBufferFilled(const sp<AMessage> &msg);
67    void onBufferConsumed(int32_t size);
68    void requestMaxBuffers();
69    void onShutdown();
70
71    int32_t mBufferGeneration;
72    bool    mReachedEOS;
73    // TODO mPendingBuffersToFill and mPendingBuffersToDrain are only for
74    // debugging. They can be removed when the power investigation is done.
75    size_t  mPendingBuffersToFill;
76    size_t  mPendingBuffersToDrain;
77    size_t  mCachedBytes;
78    AString mComponentName;
79
80    DISALLOW_EVIL_CONSTRUCTORS(DecoderPassThrough);
81};
82
83}  // namespace android
84
85#endif  // NUPLAYER_DECODER_PASS_THROUGH_H_
86