AnotherPacketSource.h revision 632740c58119a132ce19f6d498e39c5c3773971a 
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 ANOTHER_PACKET_SOURCE_H_
18
19#define ANOTHER_PACKET_SOURCE_H_
20
21#include <media/stagefright/foundation/ABase.h>
22#include <media/stagefright/MediaSource.h>
23#include <utils/threads.h>
24#include <utils/List.h>
25
26#include "ATSParser.h"
27
28namespace android {
29
30struct ABuffer;
31
32struct AnotherPacketSource : public MediaSource {
33    AnotherPacketSource(const sp<MetaData> &meta);
34
35    void setFormat(const sp<MetaData> &meta);
36
37    virtual status_t start(MetaData *params = NULL);
38    virtual status_t stop();
39    virtual sp<MetaData> getFormat();
40
41    virtual status_t read(
42            MediaBuffer **buffer, const ReadOptions *options = NULL);
43
44    void clear();
45
46    bool hasBufferAvailable(status_t *finalResult);
47
48    // Returns the difference between the last and the first queued
49    // presentation timestamps since the last discontinuity (if any).
50    int64_t getBufferedDurationUs(status_t *finalResult);
51
52    status_t nextBufferTime(int64_t *timeUs);
53
54    void queueAccessUnit(const sp<ABuffer> &buffer);
55
56    void queueDiscontinuity(
57            ATSParser::DiscontinuityType type,
58            const sp<AMessage> &extra,
59            bool discard);
60
61    void signalEOS(status_t result);
62
63    status_t dequeueAccessUnit(sp<ABuffer> *buffer);
64
65    bool isFinished(int64_t duration) const;
66
67    sp<AMessage> getLatestMeta();
68
69protected:
70    virtual ~AnotherPacketSource();
71
72private:
73    Mutex mLock;
74    Condition mCondition;
75
76    bool mIsAudio;
77    sp<MetaData> mFormat;
78    int64_t mLastQueuedTimeUs;
79    List<sp<ABuffer> > mBuffers;
80    status_t mEOSResult;
81    sp<AMessage> mLatestEnqueuedMeta;
82
83    bool wasFormatChange(int32_t discontinuityType) const;
84
85    DISALLOW_EVIL_CONSTRUCTORS(AnotherPacketSource);
86};
87
88
89}  // namespace android
90
91#endif  // ANOTHER_PACKET_SOURCE_H_
92