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for #250, add comments for elemetary stream specifed by stream_id.

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winlin 2015-01-31 11:46:51 +08:00
parent a384cc400a
commit bce78fdab6
3 changed files with 191 additions and 69 deletions
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138
trunk/src/kernel/srs_kernel_ts.hpp
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@ -162,6 +162,7 @@ enum SrsTsStream
// ISO/IEC 14496-2 Visual
SrsTsStreamVideoMpeg4 = 0x10,
// ISO/IEC 14496-3 Audio with the LATM transport syntax as defined in ISO/IEC 14496-3 / AMD 1
SrsTsStreamAudioMpeg4 = 0x11,
// ISO/IEC 14496-1 SL-packetized stream or FlexMux stream carried in PES packets
// ISO/IEC 14496-1 SL-packetized stream or FlexMux stream carried in ISO/IEC14496_sections.
// ISO/IEC 13818-6 Synchronized Download Protocol
@ -188,19 +189,83 @@ struct SrsTsChannel
virtual ~SrsTsChannel();
};
/**
* the stream_id of PES payload of ts packet.
* Table 2-18 – Stream_id assignments, hls-mpeg-ts-iso13818-1.pdf, page 52.
*/
enum SrsTsPESStreamId
{
// program_stream_map
SrsTsPESStreamIdProgramStreamMap = 0xbc, // 0b10111100
// private_stream_1
SrsTsPESStreamIdPrivateStream1 = 0xbd, // 0b10111101
// padding_stream
SrsTsPESStreamIdPaddingStream = 0xbe, // 0b10111110
// private_stream_2
SrsTsPESStreamIdPrivateStream2 = 0xbf, // 0b10111111
// 110x xxxx
// ISO/IEC 13818-3 or ISO/IEC 11172-3 or ISO/IEC 13818-7 or ISO/IEC
// 14496-3 audio stream number x xxxx
// ((sid >> 5) & 0x07) == SrsTsPESStreamIdAudio
SrsTsPESStreamIdAudio = 0x06, // 0b110
// 1110 xxxx
// ITU-T Rec. H.262 | ISO/IEC 13818-2 or ISO/IEC 11172-2 or ISO/IEC
// 14496-2 video stream number xxxx
// ((stream_id >> 4) & 0x0f) == SrsTsPESStreamIdVideo
SrsTsPESStreamIdVideo = 0x0e, // 0b1110
// ECM_stream
SrsTsPESStreamIdEcmStream = 0xf0, // 0b11110000
// EMM_stream
SrsTsPESStreamIdEmmStream = 0xf1, // 0b11110001
// DSMCC_stream
SrsTsPESStreamIdDsmccStream = 0xf2, // 0b11110010
// 13522_stream
SrsTsPESStreamId13522Stream = 0xf3, // 0b11110011
// H_222_1_type_A
SrsTsPESStreamIdH2221TypeA = 0xf4, // 0b11110100
// H_222_1_type_B
SrsTsPESStreamIdH2221TypeB = 0xf5, // 0b11110101
// H_222_1_type_C
SrsTsPESStreamIdH2221TypeC = 0xf6, // 0b11110110
// H_222_1_type_D
SrsTsPESStreamIdH2221TypeD = 0xf7, // 0b11110111
// H_222_1_type_E
SrsTsPESStreamIdH2221TypeE = 0xf8, // 0b11111000
// ancillary_stream
SrsTsPESStreamIdAncillaryStream = 0xf9, // 0b11111001
// SL_packetized_stream
SrsTsPESStreamIdSlPacketizedStream = 0xfa, // 0b11111010
// FlexMux_stream
SrsTsPESStreamIdFlexMuxStream = 0xfb, // 0b11111011
// reserved data stream
// 1111 1100 … 1111 1110
// program_stream_directory
SrsTsPESStreamIdProgramStreamDirectory = 0xff, // 0b11111111
};
/**
* the media audio/video message parsed from PES packet.
*/
class SrsTsMessage
{
private:
public:
SrsTsChannel* channel;
SrsTsPacket* packet;
public:
// the timestamp in 90khz
int64_t dts;
int64_t pts;
// the id of pes stream to indicates the payload codec.
// @remark use is_audio() and is_video() to check it, and stream_number() to finger it out.
SrsTsPESStreamId sid;
// the size of payload, 0 indicates the length() of payload.
u_int16_t PES_packet_length;
// the chunk id.
u_int8_t continuity_counter;
// the payload bytes.
SrsSimpleBuffer* payload;
public:
SrsTsMessage(SrsTsChannel* c, SrsTsPacket* p);
@ -223,6 +288,20 @@ public:
* whether the message is fresh.
*/
virtual bool fresh();
public:
/**
* whether the sid indicates the elementary stream audio.
*/
virtual bool is_audio();
/**
* whether the sid indicates the elementary stream video.
*/
virtual bool is_video();
/**
* when audio or video, get the stream number which specifies the format of stream.
* @return the stream number for audio/video; otherwise, -1.
*/
virtual int stream_number();
};
/**
@ -722,63 +801,6 @@ public:
virtual int decode(SrsStream* stream, SrsTsMessage** ppmsg) = 0;
};
/**
* the stream_id of PES payload of ts packet.
* Table 2-18 – Stream_id assignments, hls-mpeg-ts-iso13818-1.pdf, page 52.
*/
enum SrsTsPESStreamId
{
// program_stream_map
SrsTsPESStreamIdProgramStreamMap = 0xbc, // 0b10111100
// private_stream_1
SrsTsPESStreamIdPrivateStream1 = 0xbd, // 0b10111101
// padding_stream
SrsTsPESStreamIdPaddingStream = 0xbe, // 0b10111110
// private_stream_2
SrsTsPESStreamIdPrivateStream2 = 0xbf, // 0b10111111
// 110x xxxx
// ISO/IEC 13818-3 or ISO/IEC 11172-3 or ISO/IEC 13818-7 or ISO/IEC
// 14496-3 audio stream number x xxxx
// (stream_id>>5)&0x07 == SrsTsPESStreamIdAudio
SrsTsPESStreamIdAudio = 0x06, // 0b110
// 1110 xxxx
// ITU-T Rec. H.262 | ISO/IEC 13818-2 or ISO/IEC 11172-2 or ISO/IEC
// 14496-2 video stream number xxxx
// (stream_id>>4)&0x0f == SrsTsPESStreamIdVideo
SrsTsPESStreamIdVideo = 0x0e, // 0b1110
// ECM_stream
SrsTsPESStreamIdEcmStream = 0xf0, // 0b11110000
// EMM_stream
SrsTsPESStreamIdEmmStream = 0xf1, // 0b11110001
// DSMCC_stream
SrsTsPESStreamIdDsmccStream = 0xf2, // 0b11110010
// 13522_stream
SrsTsPESStreamId13522Stream = 0xf3, // 0b11110011
// H_222_1_type_A
SrsTsPESStreamIdH2221TypeA = 0xf4, // 0b11110100
// H_222_1_type_B
SrsTsPESStreamIdH2221TypeB = 0xf5, // 0b11110101
// H_222_1_type_C
SrsTsPESStreamIdH2221TypeC = 0xf6, // 0b11110110
// H_222_1_type_D
SrsTsPESStreamIdH2221TypeD = 0xf7, // 0b11110111
// H_222_1_type_E
SrsTsPESStreamIdH2221TypeE = 0xf8, // 0b11111000
// ancillary_stream
SrsTsPESStreamIdAncillaryStream = 0xf9, // 0b11111001
// SL_packetized_stream
SrsTsPESStreamIdSlPacketizedStream = 0xfa, // 0b11111010
// FlexMux_stream
SrsTsPESStreamIdFlexMuxStream = 0xfb, // 0b11111011
// reserved data stream
// 1111 1100 … 1111 1110
// program_stream_directory
SrsTsPESStreamIdProgramStreamDirectory = 0xff, // 0b11111111
};
/**
* the PES payload of ts packet.
* 2.4.3.6 PES packet, hls-mpeg-ts-iso13818-1.pdf, page 49