external/srs
1
0
Fork 0
mirror of https://github.com/ossrs/srs.git synced 2025-03-09 15:49:59 +00:00
Code Issues Releases Wiki Activity

add aac specification, iso-13818-7

Browse source
This commit is contained in:
winlin 2013-11-19 23:03:05 +08:00
parent 1ae03a2ba0
commit f667351095
2 changed files with 43 additions and 29 deletions
Download patch file Download diff file Expand all files Collapse all files

BIN
trunk/doc/aac-iso-13818-7.pdf Normal file
View file

Binary file not shown.

72
trunk/research/ts_info.cpp
View file

@ -48,6 +48,11 @@ SECTION 2
2.4.4.6 Conditional access Table 2.4.4.6 Conditional access Table
2.5 Program Stream bitstream requirements 2.5 Program Stream bitstream requirements
2.6 Program and program element descriptors 2.6 Program and program element descriptors
2.6.2 Video stream descriptor
2.6.4 Audio stream descriptor
2.6.34 IBP descriptor
2.6.37 Semantic definition of fields in MPEG-4 video descriptor
2.6.38 MPEG-4 audio descriptor
2.7 Restrictions on the multiplexed stream semantics 2.7 Restrictions on the multiplexed stream semantics
Annex A ¨C CRC Decoder Model Annex A ¨C CRC Decoder Model
*/ */
@ -129,7 +134,9 @@ public:
int finish(); int finish();
}; };
// TSHeader declares. /**
* 2.4.3.2 Transport Stream packet layer. page 36.
*/
class TSHeader class TSHeader
{ {
public: public:
@ -367,6 +374,7 @@ public:
TSPayloadPMT(); TSPayloadPMT();
virtual ~TSPayloadPMT(); virtual ~TSPayloadPMT();
TSPMTESInfo* at(int index);
int demux(TSContext* ctx, TSPacket* pkt, u_int8_t* start, u_int8_t* last, u_int8_t*& p, TSMessage*& pmsg); int demux(TSContext* ctx, TSPacket* pkt, u_int8_t* start, u_int8_t* last, u_int8_t*& p, TSMessage*& pmsg);
}; };
@ -375,10 +383,10 @@ public:
*/ */
enum TSPESStreamId enum TSPESStreamId
{ {
PES_program_stream_map = 0b10111100, PES_program_stream_map = 0b10111100, // 0xbc
PES_private_stream_1 = 0b10111101, PES_private_stream_1 = 0b10111101, // 0xbd
PES_padding_stream = 0b10111110, PES_padding_stream = 0b10111110, // 0xbe
PES_private_stream_2 = 0b10111111, PES_private_stream_2 = 0b10111111, // 0xbf
// 110x xxxx // 110x xxxx
// ISO/IEC 13818-3 or ISO/IEC 11172-3 or ISO/IEC 13818-7 or ISO/IEC // ISO/IEC 13818-3 or ISO/IEC 11172-3 or ISO/IEC 13818-7 or ISO/IEC
@ -389,24 +397,24 @@ enum TSPESStreamId
// 1110 xxxx // 1110 xxxx
// ITU-T Rec. H.262 | ISO/IEC 13818-2 or ISO/IEC 11172-2 or ISO/IEC // ITU-T Rec. H.262 | ISO/IEC 13818-2 or ISO/IEC 11172-2 or ISO/IEC
// 14496-2 video stream number xxxx // 14496-2 video stream number xxxx
// (stream_id>>5)&0x07 == PES_audio_prefix // (stream_id>>4)&0x0f == PES_audio_prefix
PES_video_prefix = 0b1110, PES_video_prefix = 0b1110,
PES_ECM_stream = 0b11110000, PES_ECM_stream = 0b11110000, // 0xf0
PES_EMM_stream = 0b11110001, PES_EMM_stream = 0b11110001, // 0xf1
PES_DSMCC_stream = 0b11110010, PES_DSMCC_stream = 0b11110010, // 0xf2
PES_13522_stream = 0b11110011, PES_13522_stream = 0b11110011, // 0xf3
PES_H_222_1_type_A = 0b11110100, PES_H_222_1_type_A = 0b11110100, // 0xf4
PES_H_222_1_type_B = 0b11110101, PES_H_222_1_type_B = 0b11110101, // 0xf5
PES_H_222_1_type_C = 0b11110110, PES_H_222_1_type_C = 0b11110110, // 0xf6
PES_H_222_1_type_D = 0b11110111, PES_H_222_1_type_D = 0b11110111, // 0xf7
PES_H_222_1_type_E = 0b11111000, PES_H_222_1_type_E = 0b11111000, // 0xf8
PES_ancillary_stream = 0b11111001, PES_ancillary_stream = 0b11111001, // 0xf9
PES_SL_packetized_stream = 0b11111010, PES_SL_packetized_stream = 0b11111010, // 0xfa
PES_FlexMux_stream = 0b11111011, PES_FlexMux_stream = 0b11111011, // 0xfb
// reserved data stream // reserved data stream
// 1111 1100 … 1111 1110 // 1111 1100 … 1111 1110
PES_program_stream_directory= 0b11111111, PES_program_stream_directory= 0b11111111, // 0xff
}; };
@ -1005,6 +1013,11 @@ TSPayloadPMT::~TSPayloadPMT()
ES_info.clear(); ES_info.clear();
} }
TSPMTESInfo* TSPayloadPMT::at(int index)
{
return ES_info.at(index);
}
int TSPayloadPMT::demux(TSContext* ctx, TSPacket* pkt, u_int8_t* start, u_int8_t* last, u_int8_t*& p, TSMessage*& pmsg) int TSPayloadPMT::demux(TSContext* ctx, TSPacket* pkt, u_int8_t* start, u_int8_t* last, u_int8_t*& p, TSMessage*& pmsg)
{ {
int ret = 0; int ret = 0;
@ -1192,6 +1205,17 @@ int TSPayloadPES::demux(TSContext* ctx, TSPacket* pkt, u_int8_t* start, u_int8_t
{ {
int ret = 0; int ret = 0;
if (!pkt->header->payload_unit_start_indicator) {
TSMessage* msg = ctx->get_msg(pkt->header->pid);
if (msg->packet_start_code_prefix != 0x01) {
trace("ts+pes decode continous packet error, msg is empty.");
return -1;
}
msg->append(p, last - p);
msg->detach(ctx, pmsg);
return ret;
}
char* pp = (char*)&packet_start_code_prefix; char* pp = (char*)&packet_start_code_prefix;
pp[2] = *p++; pp[2] = *p++;
pp[1] = *p++; pp[1] = *p++;
@ -1478,16 +1502,6 @@ int TSPayload::demux(TSContext* ctx, TSPacket* pkt, u_int8_t* start, u_int8_t* l
return pmt->demux(ctx, pkt, start, last, p, pmsg); return pmt->demux(ctx, pkt, start, last, p, pmsg);
} }
if (pid && (pid->type == TSPidTypeVideo || pid->type == TSPidTypeAudio)) { if (pid && (pid->type == TSPidTypeVideo || pid->type == TSPidTypeAudio)) {
if (!pkt->header->payload_unit_start_indicator) {
TSMessage* msg = ctx->get_msg(pkt->header->pid);
if (msg->packet_start_code_prefix != 0x01) {
trace("ts+pes decode continous packet error, msg is empty.");
return -1;
}
msg->append(p, last - p);
msg->detach(ctx, pmsg);
return ret;
}
type = pid->type; type = pid->type;
pes = new TSPayloadPES(); pes = new TSPayloadPES();
return pes->demux(ctx, pkt, start, last, p, pmsg); return pes->demux(ctx, pkt, start, last, p, pmsg);