AnotherPacketSource.h revision 0ad776d2e4c6b4968d9dcd9bf34b962366b312a9 
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    int64_t getEstimatedDurationUs();
53
54    status_t nextBufferTime(int64_t *timeUs);
55
56    void queueAccessUnit(const sp<ABuffer> &buffer);
57
58    void queueDiscontinuity(
59            ATSParser::DiscontinuityType type,
60            const sp<AMessage> &extra,
61            bool discard);
62
63    void signalEOS(status_t result);
64
65    status_t dequeueAccessUnit(sp<ABuffer> *buffer);
66
67    bool isFinished(int64_t duration) const;
68
69    sp<AMessage> getLatestEnqueuedMeta();
70    sp<AMessage> getLatestDequeuedMeta();
71
72protected:
73    virtual ~AnotherPacketSource();
74
75private:
76    Mutex mLock;
77    Condition mCondition;
78
79    bool mIsAudio;
80    bool mIsVideo;
81    sp<MetaData> mFormat;
82    int64_t mLastQueuedTimeUs;
83    List<sp<ABuffer> > mBuffers;
84    status_t mEOSResult;
85    sp<AMessage> mLatestEnqueuedMeta;
86    sp<AMessage> mLatestDequeuedMeta;
87
88    size_t  mQueuedDiscontinuityCount;
89
90    bool wasFormatChange(int32_t discontinuityType) const;
91    int64_t getBufferedDurationUs_l(status_t *finalResult);
92
93    DISALLOW_EVIL_CONSTRUCTORS(AnotherPacketSource);
94};
95
96
97}  // namespace android
98
99#endif  // ANOTHER_PACKET_SOURCE_H_
100