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/MediaSource.h> 22 #include <media/stagefright/foundation/ABase.h> 23 #include <utils/threads.h> 24 #include <utils/List.h> 25 26 #include "ATSParser.h" 27 28 namespace android { 29 30 struct ABuffer; 31 32 struct AnotherPacketSource : public MediaSource { 33 explicit 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 MediaBufferBase **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 number of available buffers. finalResult is always OK 53 // if this method returns non-0, or the final result if it returns 0. 54 size_t getAvailableBufferCount(status_t *finalResult); 55 56 // Returns the difference between the last and the first queued 57 // presentation timestamps since the last discontinuity (if any). 58 int64_t getBufferedDurationUs(status_t *finalResult); 59 60 // Returns the difference between the two largest timestamps queued 61 int64_t getEstimatedBufferDurationUs(); 62 63 status_t nextBufferTime(int64_t *timeUs); 64 65 void queueAccessUnit(const sp<ABuffer> &buffer); 66 67 void queueDiscontinuity( 68 ATSParser::DiscontinuityType type, 69 const sp<AMessage> &extra, 70 bool discard); 71 72 void signalEOS(status_t result); 73 74 status_t dequeueAccessUnit(sp<ABuffer> *buffer); 75 void requeueAccessUnit(const sp<ABuffer> &buffer); 76 77 bool isFinished(int64_t duration) const; 78 79 void enable(bool enable); 80 81 sp<AMessage> getLatestEnqueuedMeta(); 82 sp<AMessage> getLatestDequeuedMeta(); 83 sp<AMessage> getMetaAfterLastDequeued(int64_t delayUs); 84 85 void trimBuffersAfterMeta(const sp<AMessage> &meta); 86 sp<AMessage> trimBuffersBeforeMeta(const sp<AMessage> &meta); 87 88 protected: 89 virtual ~AnotherPacketSource(); 90 91 private: 92 93 struct DiscontinuitySegment { 94 int64_t mMaxDequeTimeUs, mMaxEnqueTimeUs; DiscontinuitySegmentAnotherPacketSource::DiscontinuitySegment95 DiscontinuitySegment() 96 : mMaxDequeTimeUs(-1), 97 mMaxEnqueTimeUs(-1) { 98 }; 99 clearAnotherPacketSource::DiscontinuitySegment100 void clear() { 101 mMaxDequeTimeUs = mMaxEnqueTimeUs = -1; 102 } 103 }; 104 105 // Discontinuity segments are consecutive access units between 106 // discontinuity markers. There should always be at least _ONE_ 107 // discontinuity segment, hence the various CHECKs in 108 // AnotherPacketSource.cpp for non-empty()-ness. 109 List<DiscontinuitySegment> mDiscontinuitySegments; 110 111 Mutex mLock; 112 Condition mCondition; 113 114 bool mIsAudio; 115 bool mIsVideo; 116 bool mEnabled; 117 sp<MetaData> mFormat; 118 int64_t mLastQueuedTimeUs; 119 int64_t mEstimatedBufferDurationUs; 120 List<sp<ABuffer> > mBuffers; 121 status_t mEOSResult; 122 sp<AMessage> mLatestEnqueuedMeta; 123 sp<AMessage> mLatestDequeuedMeta; 124 125 bool wasFormatChange(int32_t discontinuityType) const; 126 127 DISALLOW_EVIL_CONSTRUCTORS(AnotherPacketSource); 128 }; 129 130 131 } // namespace android 132 133 #endif // ANOTHER_PACKET_SOURCE_H_ 134