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