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300 lines
9.8 KiB
300 lines
9.8 KiB
/*****************************************************************************
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* pmt.h: ISO/IEC 13818-1 Program Map Table (PMT)
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*****************************************************************************
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* Copyright (C) 2009-2010 VideoLAN
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*
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* Authors: Christophe Massiot <massiot@via.ecp.fr>
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject
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* to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*****************************************************************************/
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/*
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* Normative references:
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* - ISO/IEC 13818-1:2007(E) (MPEG-2 Systems)
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*/
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#ifndef __BITSTREAM_MPEG_PMT_H__
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#define __BITSTREAM_MPEG_PMT_H__
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#include <bitstream/common.h>
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#include <bitstream/mpeg/psi/psi.h>
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#include <bitstream/mpeg/psi/descriptors.h>
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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/*****************************************************************************
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* Program Map Table
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*****************************************************************************/
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#define PMT_TABLE_ID 0x2
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#define PMT_HEADER_SIZE (PSI_HEADER_SIZE_SYNTAX1 + 4)
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#define PMT_ES_SIZE 5
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#define pmt_set_program psi_set_tableidext
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#define pmt_get_program psi_get_tableidext
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#define PMT_STREAMTYPE_VIDEO_MPEG1 0x1
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#define PMT_STREAMTYPE_VIDEO_MPEG2 0x2
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#define PMT_STREAMTYPE_AUDIO_MPEG1 0x3
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#define PMT_STREAMTYPE_AUDIO_MPEG2 0x4
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#define PMT_STREAMTYPE_PRIVATE_PSI 0x5
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#define PMT_STREAMTYPE_PRIVATE_PES 0x6
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#define PMT_STREAMTYPE_MHEG 0x7
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#define PMT_STREAMTYPE_DSM_CC 0x8
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#define PMT_STREAMTYPE_H222_1 0x9
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#define PMT_STREAMTYPE_13818_6_A 0xa
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#define PMT_STREAMTYPE_13818_6_B 0xb
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#define PMT_STREAMTYPE_13818_6_C 0xc
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#define PMT_STREAMTYPE_13818_6_D 0xd
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#define PMT_STREAMTYPE_H222_0_AUX 0xe
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#define PMT_STREAMTYPE_AUDIO_ADTS 0xf
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#define PMT_STREAMTYPE_VIDEO_MPEG4 0x10
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#define PMT_STREAMTYPE_AUDIO_LATM 0x11
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#define PMT_STREAMTYPE_SL_PES 0x12
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#define PMT_STREAMTYPE_SL_14496 0x13
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#define PMT_STREAMTYPE_SDP 0x14
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#define PMT_STREAMTYPE_META_PES 0x15
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#define PMT_STREAMTYPE_META_PSI 0x16
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#define PMT_STREAMTYPE_META_DC 0x17
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#define PMT_STREAMTYPE_META_OC 0x18
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#define PMT_STREAMTYPE_META_SDP 0x19
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#define PMT_STREAMTYPE_IPMP_13818_11 0x1a
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#define PMT_STREAMTYPE_VIDEO_AVC 0x1b
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#define PMT_STREAMTYPE_VIDEO_HEVC 0x24
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#define PMT_STREAMTYPE_VIDEO_AVS 0x42
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#define PMT_STREAMTYPE_IPMP 0x7f
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#define PMT_STREAMTYPE_ATSC_A52 0x81
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#define PMT_STREAMTYPE_SCTE_35 0x86
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#define PMT_STREAMTYPE_ATSC_A52E 0x87
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static inline void pmt_init(uint8_t *p_pmt)
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{
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psi_init(p_pmt, true);
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psi_set_tableid(p_pmt, PMT_TABLE_ID);
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p_pmt[1] &= ~0x40;
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psi_set_section(p_pmt, 0);
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psi_set_lastsection(p_pmt, 0);
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p_pmt[8] = 0xe0;
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p_pmt[10] = 0xf0;
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}
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static inline void pmt_set_length(uint8_t *p_pmt, uint16_t i_pmt_length)
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{
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psi_set_length(p_pmt, PMT_HEADER_SIZE + PSI_CRC_SIZE - PSI_HEADER_SIZE
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+ i_pmt_length);
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}
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static inline void pmt_set_pcrpid(uint8_t *p_pmt, uint16_t i_pcr_pid)
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{
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p_pmt[8] &= ~0x1f;
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p_pmt[8] |= i_pcr_pid >> 8;
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p_pmt[9] = i_pcr_pid & 0xff;
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}
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static inline uint16_t pmt_get_pcrpid(const uint8_t *p_pmt)
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{
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return ((p_pmt[8] & 0x1f) << 8) | p_pmt[9];
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}
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static inline void pmt_set_desclength(uint8_t *p_pmt, uint16_t i_length)
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{
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p_pmt[10] &= ~0xf;
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p_pmt[10] |= i_length >> 8;
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p_pmt[11] = i_length & 0xff;
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}
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static inline uint16_t pmt_get_desclength(const uint8_t *p_pmt)
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{
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return ((p_pmt[10] & 0xf) << 8) | p_pmt[11];
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}
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static inline uint8_t *pmt_get_descs(uint8_t *p_pmt)
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{
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return &p_pmt[10];
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}
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static inline void pmtn_init(uint8_t *p_pmt_n)
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{
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p_pmt_n[1] = 0xe0;
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p_pmt_n[3] = 0xf0;
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}
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static inline void pmtn_set_streamtype(uint8_t *p_pmt_n, uint8_t i_stream_type)
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{
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p_pmt_n[0] = i_stream_type;
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}
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static inline uint8_t pmtn_get_streamtype(const uint8_t *p_pmt_n)
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{
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return p_pmt_n[0];
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}
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static inline const char *pmt_get_streamtype_txt(uint8_t i_stream_type) {
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/* ISO/IEC 13818-1 | Table 2-36 - Stream type assignments */
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if (i_stream_type == 0)
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return "Reserved";
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switch (i_stream_type) {
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case 0x01: return "11172-2 video (MPEG-1)";
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case 0x02: return "13818-2 video (MPEG-2)";
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case 0x03: return "11172-3 audio (MPEG-1)";
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case 0x04: return "13818-3 audio (MPEG-2)";
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case 0x05: return "13818-1 private sections";
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case 0x06: return "13818-1 PES private data";
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case 0x07: return "13522 MHEG";
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case 0x08: return "H.222.0/13818-1 Annex A - DSM CC";
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case 0x09: return "H.222.1";
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case 0x0A: return "13818-6 type A";
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case 0x0B: return "13818-6 type B";
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case 0x0C: return "13818-6 type C";
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case 0x0D: return "13818-6 type D";
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case 0x0E: return "H.222.0/13818-1 auxiliary";
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case 0x0F: return "13818-7 Audio with ADTS transport syntax";
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case 0x10: return "14496-2 Visual (MPEG-4 part 2 video)";
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case 0x11: return "14496-3 Audio with LATM transport syntax (14496-3/AMD 1)";
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case 0x12: return "14496-1 SL-packetized or FlexMux stream in PES packets";
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case 0x13: return "14496-1 SL-packetized or FlexMux stream in 14496 sections";
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case 0x14: return "ISO/IEC 13818-6 Synchronized Download Protocol";
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case 0x15: return "Metadata in PES packets";
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case 0x16: return "Metadata in metadata_sections";
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case 0x17: return "Metadata in 13818-6 Data Carousel";
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case 0x18: return "Metadata in 13818-6 Object Carousel";
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case 0x19: return "Metadata in 13818-6 Synchronized Download Protocol";
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case 0x1A: return "13818-11 MPEG-2 IPMP stream";
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case 0x1B: return "H.264/14496-10 video (MPEG-4/AVC)";
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case 0x24: return "H.265 video (MPEG-H/HEVC)";
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case 0x42: return "AVS Video";
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case 0x7F: return "IPMP stream";
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case 0x81: return "ATSC A/52";
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case 0x86: return "SCTE 35 Splice Information Table";
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case 0x87: return "ATSC A/52e";
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default : return "Unknown";
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}
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}
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static inline void pmtn_set_pid(uint8_t *p_pmt_n, uint16_t i_pid)
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{
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p_pmt_n[1] &= ~0x1f;
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p_pmt_n[1] |= i_pid >> 8;
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p_pmt_n[2] = i_pid & 0xff;
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}
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static inline uint16_t pmtn_get_pid(const uint8_t *p_pmt_n)
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{
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return ((p_pmt_n[1] & 0x1f) << 8) | p_pmt_n[2];
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}
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static inline void pmtn_set_desclength(uint8_t *p_pmt_n, uint16_t i_length)
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{
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p_pmt_n[3] &= ~0xf;
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p_pmt_n[3] |= i_length >> 8;
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p_pmt_n[4] = i_length & 0xff;
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}
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static inline uint16_t pmtn_get_desclength(const uint8_t *p_pmt_n)
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{
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return ((p_pmt_n[3] & 0xf) << 8) | p_pmt_n[4];
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}
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static inline uint8_t *pmtn_get_descs(uint8_t *p_pmt_n)
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{
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return &p_pmt_n[3];
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}
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static inline uint8_t *pmt_get_es(uint8_t *p_pmt, uint8_t n)
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{
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uint16_t i_section_size = psi_get_length(p_pmt) + PSI_HEADER_SIZE
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- PSI_CRC_SIZE;
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uint8_t *p_pmt_n = p_pmt + PMT_HEADER_SIZE + pmt_get_desclength(p_pmt);
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if (p_pmt_n - p_pmt > i_section_size) return NULL;
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while (n) {
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if (p_pmt_n + PMT_ES_SIZE - p_pmt > i_section_size) return NULL;
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p_pmt_n += PMT_ES_SIZE + pmtn_get_desclength(p_pmt_n);
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n--;
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}
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if (p_pmt_n - p_pmt >= i_section_size) return NULL;
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return p_pmt_n;
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}
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static inline bool pmt_validate_es(const uint8_t *p_pmt, const uint8_t *p_pmt_n,
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uint16_t i_desclength)
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{
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uint16_t i_section_size = psi_get_length(p_pmt) + PSI_HEADER_SIZE
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- PSI_CRC_SIZE;
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return (p_pmt_n + PMT_ES_SIZE + i_desclength
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<= p_pmt + i_section_size);
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}
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static inline bool pmt_validate(const uint8_t *p_pmt)
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{
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uint16_t i_section_size = psi_get_length(p_pmt) + PSI_HEADER_SIZE
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- PSI_CRC_SIZE;
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const uint8_t *p_pmt_n;
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if (!psi_get_syntax(p_pmt) || psi_get_section(p_pmt)
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|| psi_get_lastsection(p_pmt)
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|| psi_get_tableid(p_pmt) != PMT_TABLE_ID)
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return false;
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if (!psi_check_crc(p_pmt))
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return false;
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if (i_section_size < PMT_HEADER_SIZE
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|| i_section_size < PMT_HEADER_SIZE + pmt_get_desclength(p_pmt))
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return false;
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if (!descs_validate(p_pmt + 10))
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return false;
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p_pmt_n = p_pmt + PMT_HEADER_SIZE + pmt_get_desclength(p_pmt);
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while (p_pmt_n + PMT_ES_SIZE - p_pmt <= i_section_size
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&& p_pmt_n + PMT_ES_SIZE + pmtn_get_desclength(p_pmt_n) - p_pmt
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<= i_section_size) {
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if (!descs_validate(p_pmt_n + 3))
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return false;
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p_pmt_n += PMT_ES_SIZE + pmtn_get_desclength(p_pmt_n);
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}
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return (p_pmt_n - p_pmt == i_section_size);
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}
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static inline uint8_t *pmt_find_es(uint8_t *p_pmt, uint16_t i_pid)
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{
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uint8_t *p_es;
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uint8_t j = 0;
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while ((p_es = pmt_get_es(p_pmt, j)) != NULL) {
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j++;
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if (pmtn_get_pid(p_es) == i_pid)
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return p_es;
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}
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return NULL;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif
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