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 A_TS_PARSER_H_ 18 19 #define A_TS_PARSER_H_ 20 21 #include <sys/types.h> 22 23 #include <media/stagefright/foundation/ABase.h> 24 #include <media/stagefright/foundation/AMessage.h> 25 #include <utils/KeyedVector.h> 26 #include <utils/Vector.h> 27 #include <utils/RefBase.h> 28 29 namespace android { 30 31 struct ABitReader; 32 struct ABuffer; 33 struct MediaSource; 34 35 struct ATSParser : public RefBase { 36 enum DiscontinuityType { 37 DISCONTINUITY_NONE = 0, 38 DISCONTINUITY_TIME = 1, 39 DISCONTINUITY_AUDIO_FORMAT = 2, 40 DISCONTINUITY_VIDEO_FORMAT = 4, 41 42 DISCONTINUITY_SEEK = DISCONTINUITY_TIME, 43 44 // For legacy reasons this also implies a time discontinuity. 45 DISCONTINUITY_FORMATCHANGE = 46 DISCONTINUITY_AUDIO_FORMAT 47 | DISCONTINUITY_VIDEO_FORMAT 48 | DISCONTINUITY_TIME, 49 }; 50 51 enum Flags { 52 // The 90kHz clock (PTS/DTS) is absolute, i.e. PTS=0 corresponds to 53 // a media time of 0. 54 // If this flag is _not_ specified, the first PTS encountered in a 55 // program of this stream will be assumed to correspond to media time 0 56 // instead. 57 TS_TIMESTAMPS_ARE_ABSOLUTE = 1 58 }; 59 60 ATSParser(uint32_t flags = 0); 61 62 status_t feedTSPacket(const void *data, size_t size); 63 64 void signalDiscontinuity( 65 DiscontinuityType type, const sp<AMessage> &extra); 66 67 void signalEOS(status_t finalResult); 68 69 enum SourceType { 70 VIDEO, 71 AUDIO 72 }; 73 sp<MediaSource> getSource(SourceType type); 74 75 bool PTSTimeDeltaEstablished(); 76 77 enum { 78 // From ISO/IEC 13818-1: 2000 (E), Table 2-29 79 STREAMTYPE_RESERVED = 0x00, 80 STREAMTYPE_MPEG1_VIDEO = 0x01, 81 STREAMTYPE_MPEG2_VIDEO = 0x02, 82 STREAMTYPE_MPEG1_AUDIO = 0x03, 83 STREAMTYPE_MPEG2_AUDIO = 0x04, 84 STREAMTYPE_MPEG2_AUDIO_ADTS = 0x0f, 85 STREAMTYPE_MPEG4_VIDEO = 0x10, 86 STREAMTYPE_H264 = 0x1b, 87 }; 88 89 protected: 90 virtual ~ATSParser(); 91 92 private: 93 struct Program; 94 struct Stream; 95 struct PSISection; 96 97 uint32_t mFlags; 98 Vector<sp<Program> > mPrograms; 99 100 // Keyed by PID 101 KeyedVector<unsigned, sp<PSISection> > mPSISections; 102 103 void parseProgramAssociationTable(ABitReader *br); 104 void parseProgramMap(ABitReader *br); 105 void parsePES(ABitReader *br); 106 107 status_t parsePID( 108 ABitReader *br, unsigned PID, 109 unsigned payload_unit_start_indicator); 110 111 void parseAdaptationField(ABitReader *br); 112 status_t parseTS(ABitReader *br); 113 114 DISALLOW_EVIL_CONSTRUCTORS(ATSParser); 115 }; 116 117 } // namespace android 118 119 #endif // A_TS_PARSER_H_ 120