1 /* 2 * Copyright (C) 2011 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 __AAH_TX_PACKET_H__ 18 #define __AAH_TX_PACKET_H__ 19 20 #include <media/stagefright/foundation/ABase.h> 21 #include <utils/LinearTransform.h> 22 #include <utils/RefBase.h> 23 #include <utils/Timers.h> 24 25 namespace android { 26 27 class TRTPPacket : public RefBase { 28 public: 29 enum TRTPHeaderType { 30 kHeaderTypeAudio = 1, 31 kHeaderTypeVideo = 2, 32 kHeaderTypeSubpicture = 3, 33 kHeaderTypeControl = 4, 34 }; 35 36 enum TRTPPayloadFlags { 37 kFlag_TSTransformPresent = 0x02, 38 kFlag_TSValid = 0x01, 39 }; 40 41 protected: TRTPPacket(TRTPHeaderType headerType)42 TRTPPacket(TRTPHeaderType headerType) 43 : mIsPacked(false) 44 , mVersion(2) 45 , mPadding(false) 46 , mExtension(false) 47 , mCsrcCount(0) 48 , mPayloadType(100) 49 , mSeqNumber(0) 50 , mPTSValid(false) 51 , mPTS(0) 52 , mEpoch(0) 53 , mProgramID(0) 54 , mSubstreamID(0) 55 , mClockTranformValid(false) 56 , mTRTPVersion(1) 57 , mTRTPLength(0) 58 , mTRTPHeaderType(headerType) 59 , mPacket(NULL) 60 , mPacketLen(0) { } 61 62 public: 63 virtual ~TRTPPacket(); 64 65 void setSeqNumber(uint16_t val); 66 uint16_t getSeqNumber() const; 67 68 void setPTS(int64_t val); 69 int64_t getPTS() const; 70 71 void setEpoch(uint32_t val); 72 void setProgramID(uint16_t val); 73 void setSubstreamID(uint16_t val); 74 void setClockTransform(const LinearTransform& trans); 75 76 uint8_t* getPacket() const; 77 int getPacketLen() const; 78 79 void setExpireTime(nsecs_t val); 80 nsecs_t getExpireTime() const; 81 82 virtual bool pack() = 0; 83 84 // mask for the number of bits in a TRTP epoch 85 static const uint32_t kTRTPEpochMask = (1 << 22) - 1; 86 static const int kTRTPEpochShift = 10; 87 88 protected: 89 static const int kRTPHeaderLen = 12; 90 virtual int TRTPHeaderLen() const; 91 92 void writeTRTPHeader(uint8_t*& buf, 93 bool isFirstFragment, 94 int totalPacketLen); 95 96 void writeU8(uint8_t*& buf, uint8_t val); 97 void writeU16(uint8_t*& buf, uint16_t val); 98 void writeU32(uint8_t*& buf, uint32_t val); 99 void writeU64(uint8_t*& buf, uint64_t val); 100 101 bool mIsPacked; 102 103 uint8_t mVersion; 104 bool mPadding; 105 bool mExtension; 106 uint8_t mCsrcCount; 107 uint8_t mPayloadType; 108 uint16_t mSeqNumber; 109 bool mPTSValid; 110 int64_t mPTS; 111 uint32_t mEpoch; 112 uint16_t mProgramID; 113 uint16_t mSubstreamID; 114 LinearTransform mClockTranform; 115 bool mClockTranformValid; 116 uint8_t mTRTPVersion; 117 uint32_t mTRTPLength; 118 TRTPHeaderType mTRTPHeaderType; 119 120 uint8_t* mPacket; 121 int mPacketLen; 122 123 nsecs_t mExpireTime; 124 125 DISALLOW_EVIL_CONSTRUCTORS(TRTPPacket); 126 }; 127 128 class TRTPAudioPacket : public TRTPPacket { 129 public: 130 enum AudioPayloadFlags { 131 kFlag_AuxLengthPresent = 0x10, 132 kFlag_RandomAccessPoint = 0x08, 133 kFlag_Dropable = 0x04, 134 kFlag_Discontinuity = 0x02, 135 kFlag_EndOfStream = 0x01, 136 }; 137 TRTPAudioPacket()138 TRTPAudioPacket() 139 : TRTPPacket(kHeaderTypeAudio) 140 , mCodecType(kCodecInvalid) 141 , mRandomAccessPoint(false) 142 , mDropable(false) 143 , mDiscontinuity(false) 144 , mEndOfStream(false) 145 , mVolume(0) 146 , mAccessUnitData(NULL) 147 , mAccessUnitLen(0) 148 , mAuxData(NULL) 149 , mAuxDataLen(0) { } 150 151 enum TRTPAudioCodecType { 152 kCodecInvalid = 0, 153 kCodecPCMBigEndian = 1, 154 kCodecPCMLittleEndian = 2, 155 kCodecMPEG1Audio = 3, 156 kCodecAACAudio = 4, 157 }; 158 159 void setCodecType(TRTPAudioCodecType val); 160 void setRandomAccessPoint(bool val); 161 void setDropable(bool val); 162 void setDiscontinuity(bool val); 163 void setEndOfStream(bool val); 164 void setVolume(uint8_t val); 165 void setAccessUnitData(const void* data, size_t len); 166 void setAuxData(const void* data, size_t len); 167 168 virtual bool pack(); 169 170 protected: 171 virtual int TRTPHeaderLen() const; 172 173 private: 174 TRTPAudioCodecType mCodecType; 175 bool mRandomAccessPoint; 176 bool mDropable; 177 bool mDiscontinuity; 178 bool mEndOfStream; 179 uint8_t mVolume; 180 181 const void* mAccessUnitData; 182 size_t mAccessUnitLen; 183 const void* mAuxData; 184 size_t mAuxDataLen; 185 186 DISALLOW_EVIL_CONSTRUCTORS(TRTPAudioPacket); 187 }; 188 189 class TRTPControlPacket : public TRTPPacket { 190 public: TRTPControlPacket()191 TRTPControlPacket() 192 : TRTPPacket(kHeaderTypeControl) 193 , mCommandID(kCommandNop) {} 194 195 enum TRTPCommandID { 196 kCommandNop = 1, 197 kCommandFlush = 2, 198 kCommandEOS = 3, 199 }; 200 201 void setCommandID(TRTPCommandID val); 202 203 virtual bool pack(); 204 205 private: 206 TRTPCommandID mCommandID; 207 208 DISALLOW_EVIL_CONSTRUCTORS(TRTPControlPacket); 209 }; 210 211 } // namespace android 212 213 #endif // __AAH_TX_PLAYER_H__ 214