AnotherPacketSource.h revision 0dd229bb306df68b88e7419b3cc11fc6175be1da
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 // Returns true if we have any packets including discontinuities 47 bool hasBufferAvailable(status_t *finalResult); 48 49 // Returns true if we have packets that's not discontinuities 50 bool hasDataBufferAvailable(status_t *finalResult); 51 52 // Returns the difference between the last and the first queued 53 // presentation timestamps since the last discontinuity (if any). 54 int64_t getBufferedDurationUs(status_t *finalResult); 55 56 status_t nextBufferTime(int64_t *timeUs); 57 58 void queueAccessUnit(const sp<ABuffer> &buffer); 59 60 void queueDiscontinuity( 61 ATSParser::DiscontinuityType type, 62 const sp<AMessage> &extra, 63 bool discard); 64 65 void signalEOS(status_t result); 66 67 status_t dequeueAccessUnit(sp<ABuffer> *buffer); 68 void requeueAccessUnit(const sp<ABuffer> &buffer); 69 70 bool isFinished(int64_t duration) const; 71 72 void enable(bool enable); 73 74 sp<AMessage> getLatestEnqueuedMeta(); 75 sp<AMessage> getLatestDequeuedMeta(); 76 sp<AMessage> getMetaAfterLastDequeued(int64_t delayUs); 77 78 void trimBuffersAfterMeta(const sp<AMessage> &meta); 79 sp<AMessage> trimBuffersBeforeMeta(const sp<AMessage> &meta); 80 81protected: 82 virtual ~AnotherPacketSource(); 83 84private: 85 86 struct DiscontinuitySegment { 87 int64_t mMaxDequeTimeUs, mMaxEnqueTimeUs; 88 DiscontinuitySegment() 89 : mMaxDequeTimeUs(-1), 90 mMaxEnqueTimeUs(-1) { 91 }; 92 93 void clear() { 94 mMaxDequeTimeUs = mMaxEnqueTimeUs = -1; 95 } 96 }; 97 98 // Discontinuity segments are consecutive access units between 99 // discontinuity markers. There should always be at least _ONE_ 100 // discontinuity segment, hence the various CHECKs in 101 // AnotherPacketSource.cpp for non-empty()-ness. 102 List<DiscontinuitySegment> mDiscontinuitySegments; 103 104 Mutex mLock; 105 Condition mCondition; 106 107 bool mIsAudio; 108 bool mIsVideo; 109 bool mEnabled; 110 sp<MetaData> mFormat; 111 int64_t mLastQueuedTimeUs; 112 List<sp<ABuffer> > mBuffers; 113 status_t mEOSResult; 114 sp<AMessage> mLatestEnqueuedMeta; 115 sp<AMessage> mLatestDequeuedMeta; 116 117 bool wasFormatChange(int32_t discontinuityType) const; 118 119 DISALLOW_EVIL_CONSTRUCTORS(AnotherPacketSource); 120}; 121 122 123} // namespace android 124 125#endif // ANOTHER_PACKET_SOURCE_H_ 126