libtsfuncs is a library for mpeg PSI parsing and generation. https://georgi.unixsol.org/programs/libtsfuncs/

tsdata.h 14KB

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  1. #ifndef LIBTS_TSDATA_H
  2. #define LIBTS_TSDATA_H
  3. #include <netdb.h>
  4. #include <time.h>
  5. #ifndef FREE
  6. #define FREE(x) if(x) { free(x); x=NULL; }
  7. #endif
  8. #define TS_PACKET_SIZE 188
  9. #define TS_MAX_PAYLOAD_SIZE (TS_PACKET_SIZE-4)
  10. struct ts_header {
  11. uint8_t sync_byte; // Always 0x47
  12. uint16_t tei : 1, // Transport Error Indicator (TEI)
  13. pusi : 1, // Payload Unit Start Indicator
  14. prio : 1, // Transport Priority
  15. pid : 13; // PID
  16. uint8_t scramble : 2, // 00 - not scrambled, 01 - reserved, 10 - scrambled with even key, 11 - scrambled with odd key
  17. adapt_field : 1,
  18. payload_field : 1,
  19. continuity : 4;
  20. // The variables bellow this line depends may not exist in a packet
  21. uint8_t adapt_len; // adaptation field length
  22. uint8_t adapt_flags; // adaptation field flags
  23. uint8_t payload_size; // Payload size inside the packet
  24. uint8_t payload_offset; // Payload offset inside the packet
  25. };
  26. struct mpeg_audio_header {
  27. uint32_t syncword : 12,
  28. ID : 1,
  29. layer : 2,
  30. protection_bit : 1,
  31. bitrate_index : 4,
  32. sampl_freq : 2,
  33. padding_bit : 1,
  34. private_bit : 1,
  35. mode : 2,
  36. mode_extension : 2,
  37. copyright : 1,
  38. org_home : 1,
  39. emphasis : 2;
  40. uint8_t initialized;
  41. };
  42. struct ts_pes {
  43. struct ts_header ts_header;
  44. uint32_t have_pts : 1, // Have PTS in the PES (init from PES header)
  45. have_dts : 1, // Have DTS in the PES (init from PES header)
  46. is_audio : 1, // PES carries audio (mpeg2 or AC3) (init from PES stream_id and PMT stream_type and descriptors)
  47. is_audio_mpeg1 : 1, // PES carries MP1 audio (init from PMT stream_id)
  48. is_audio_mpeg1l1: 1, // PES carries MP1 audio Layer I (init from PMT audio descriptor)
  49. is_audio_mpeg1l2: 1, // PES carries MP1 audio Layer II (init from PMT audio descriptor)
  50. is_audio_mpeg1l3: 1, // PES carries MP1 audio Layer III (init from PMT audio descriptor)
  51. is_audio_mpeg2 : 1, // PES carries MP2 audio (init from PMT stream_id)
  52. is_audio_aac : 1, // PES carries AAC audio (init from PMT stream_id)
  53. is_audio_ac3 : 1, // PES carries AC3 audio (init from stream_id and PMT descriptors and elmentary stream)
  54. is_audio_dts : 1, // PES carries DTS audio (init from stream_id and elementary stream)
  55. is_video : 1, // PES carries video (mpeg2 or H.264) (init from PES stream_id)
  56. is_video_mpeg1 : 1, // PES carries mpeg1 video (init from PES stream_id)
  57. is_video_mpeg2 : 1, // PES carries mpeg2 video (init from PES stream_id)
  58. is_video_mpeg4 : 1, // PES carries mpeg4 part 2 video (init from PES stream_id)
  59. is_video_h264 : 1, // PES carries H.264 video (init from PES stream_id)
  60. is_video_avs : 1, // PES carries AVS video (init from PES stream_id)
  61. is_teletext : 1, // PES carries teletext (init from PMT descriptors)
  62. is_subtitle : 1; // PES carries subtitles (init from PMT descriptors)
  63. uint8_t stream_id; // If !0 then the PES has started initializing
  64. uint16_t pes_packet_len; // Allowed to be 0 for video streams
  65. int real_pes_packet_len; // if pes_packet_len is > 0 the this is eq to pes_packet_len
  66. // if pes_packet_len is = 0 this is set to -1 until very last packet
  67. uint8_t flags_1; // Bellow flags
  68. uint8_t reserved1 : 2, // Always eq 2 (10 binary)
  69. scrambling : 2,
  70. priority : 1,
  71. data_alignment : 1,
  72. copyright : 1,
  73. original_or_copy : 1;
  74. uint8_t flags_2; // Bellow flags
  75. uint8_t PTS_flag : 1,
  76. DTS_flag : 1,
  77. ESCR_flag : 1,
  78. ES_rate_flag : 1,
  79. trick_mode_flag : 1,
  80. add_copy_info_flag : 1,
  81. pes_crc_flag : 1,
  82. pes_extension_flag : 1;
  83. uint8_t pes_header_len;
  84. uint64_t PTS; // if (PTS_flag)
  85. uint64_t DTS; // if (DTS_flag)
  86. uint64_t ESCR; // if (ESCR_flag)
  87. uint32_t ES_rate; // if (ES_rate_flag)
  88. uint16_t trick_mode_control : 2, // if (trick_mode_flag)
  89. field_id : 2,
  90. intra_slice_refresh : 1,
  91. freq_truncation : 2,
  92. rep_ctrl : 5,
  93. tm_reserved : 4;
  94. uint8_t reserved_add : 1, // if (add_copy_info_flag)
  95. add_copy_info : 7;
  96. uint16_t prev_pes_crc; // if (pes_crc_flag)
  97. // PES extension
  98. uint8_t flags_3; // Bellow flags
  99. uint8_t pes_private_data_flag : 1,
  100. pack_header_field_flag : 1,
  101. program_packet_seq_counter_flag : 1,
  102. p_std_buffer_flag : 1,
  103. reserved2 : 3,
  104. pes_extension2_flag : 1;
  105. uint64_t pes_private_data_1; // if (pes_private_data_flag)
  106. uint64_t pes_private_data_2; // The whole field is 128 bits
  107. uint8_t pack_header_len; // if (pack_header_field_flag)
  108. uint8_t *pack_header; // Pointer into *pes_data
  109. uint8_t reserved3 : 1, // if (program_packet_seq_counter_flag)
  110. program_packet_seq_counter : 7;
  111. uint8_t mpeg1_mpeg2_identifier : 1,
  112. original_stuff_length : 6;
  113. uint16_t p_std_reserved : 2, // Always 1, if (p_std_buffer_flag)
  114. p_std_buffer_scale : 1,
  115. p_std_buffer_size : 13;
  116. uint16_t reserved4 : 1, // if (pes_extension2_flag)
  117. pes_extension_field_len : 7;
  118. uint8_t *pes_extension2; // Pointer into *pes_data
  119. // Private data
  120. uint8_t *pes_data; // Whole packet is stored here
  121. uint32_t pes_data_pos; // How much data is filled in pes_data
  122. uint32_t pes_data_size; // Total allocated for pes_data
  123. uint8_t pes_data_initialized; // Set to 1 when all of the pes_data is in *pes_data and the parsing can start
  124. // More private data
  125. uint8_t *es_data; // Pointer to start of data after PES header, initialized when the packet is fully assembled
  126. uint32_t es_data_size; // Full pes packet length (used for video streams, otherwise equal to pes_packet_len)
  127. uint8_t initialized; // Set to 1 when the packet is fully assembled
  128. // Extra data
  129. struct mpeg_audio_header mpeg_audio_header;
  130. };
  131. struct pes_entry {
  132. uint16_t pid;
  133. struct ts_pes *pes;
  134. struct ts_pes *pes_next;
  135. };
  136. struct pes_array {
  137. int max;
  138. int cur;
  139. struct pes_entry **entries;
  140. };
  141. struct ts_section_header {
  142. uint8_t pointer_field;
  143. uint8_t table_id;
  144. uint16_t section_syntax_indicator: 1, // Section Syntax Indicator
  145. private_indicator : 1, // Private section indicator
  146. reserved1 : 2, // 2 reserved bits
  147. section_length : 12; // Section lenth
  148. uint16_t ts_id_number; // Transport stream id (in PAT), Program number (in PMT)
  149. uint8_t reserved2 : 2,
  150. version_number : 5,
  151. current_next_indicator : 1;
  152. uint8_t section_number;
  153. uint8_t last_section_number;
  154. // The variables bellow this line are not in the physical packet
  155. uint16_t data_size; // Section length scaled within one packet
  156. uint16_t packet_section_len; // Section length in the current packet minus - 4 (the CRC)
  157. int section_pos; // Up to this pos the section data has come
  158. int initialized; // Set to 1 when whole sectino is initialized
  159. uint8_t *section_data; // The whole section data
  160. uint8_t *packet_data; // TS packet(s) that were used to transfer the table.
  161. int num_packets; // From how much packets this section is build
  162. };
  163. struct ts_pat_program {
  164. uint16_t program;
  165. uint16_t reserved:3,
  166. pid:13;
  167. };
  168. struct ts_pat {
  169. struct ts_header ts_header;
  170. struct ts_section_header *section_header;
  171. struct ts_pat_program **programs;
  172. uint32_t CRC;
  173. // The variables bellow are nor part of the physical packet
  174. int programs_max; // How much programs are allocated
  175. int programs_num; // How much programs are initialized
  176. uint8_t initialized; // Set to 1 when full table is initialized
  177. };
  178. enum CA_system {
  179. CA_IRDETO, // 0x0600 - 0x06FF Irdeto
  180. CA_CONNAX, // 0x0B00 - 0x0BFF Norwegian Telekom
  181. CA_CRYPTOWORKS, // 0x0D00 - 0x0DFF CrytoWorks
  182. CA_UNKNOWN,
  183. };
  184. struct ts_cat {
  185. struct ts_header ts_header;
  186. struct ts_section_header *section_header;
  187. int program_info_size;
  188. uint8_t *program_info;
  189. uint32_t CRC;
  190. // The variables bellow are nor part of the physical packet
  191. uint8_t initialized; // Set to 1 when full table is initialized
  192. };
  193. struct ts_pmt_stream {
  194. uint8_t stream_type;
  195. uint16_t reserved1 : 3,
  196. pid : 13;
  197. uint16_t reserved2 : 4,
  198. ES_info_size : 12;
  199. uint8_t *ES_info;
  200. };
  201. struct ts_pmt {
  202. struct ts_header ts_header;
  203. struct ts_section_header *section_header;
  204. uint16_t reserved1 : 3,
  205. PCR_pid : 13;
  206. uint16_t reserved2 : 4,
  207. program_info_size : 12;
  208. uint8_t *program_info;
  209. struct ts_pmt_stream **streams;
  210. uint32_t CRC;
  211. // The variables bellow are nor part of the physical packet
  212. int streams_max; // How much streams are allocated
  213. int streams_num; // How much streams are initialized
  214. uint8_t initialized; // Set to 1 when full table is initialized
  215. };
  216. struct ts_sdt_stream {
  217. uint16_t service_id;
  218. uint8_t reserved1 : 6,
  219. EIT_schedule_flag : 1,
  220. EIT_present_following_flag : 1;
  221. uint16_t running_status : 3,
  222. free_CA_mode : 1,
  223. descriptor_size : 12;
  224. uint8_t *descriptor_data;
  225. };
  226. struct ts_sdt {
  227. struct ts_header ts_header;
  228. struct ts_section_header *section_header;
  229. uint16_t original_network_id;
  230. uint8_t reserved;
  231. struct ts_sdt_stream **streams;
  232. uint32_t CRC;
  233. // The variables bellow are nor part of the physical packet
  234. int streams_max; // How much streams are allocated
  235. int streams_num; // How much streams are initialized
  236. uint8_t initialized; // Set to 1 when full table is initialized
  237. };
  238. struct ts_nit_stream {
  239. uint16_t transport_stream_id;
  240. uint16_t original_network_id;
  241. uint16_t reserved1 : 4,
  242. descriptor_size : 12;
  243. uint8_t *descriptor_data;
  244. };
  245. struct ts_nit {
  246. struct ts_header ts_header;
  247. struct ts_section_header *section_header;
  248. uint16_t reserved1 : 4,
  249. network_info_size : 12;
  250. uint8_t *network_info;
  251. uint16_t reserved2 : 4,
  252. ts_loop_size : 12;
  253. struct ts_nit_stream **streams;
  254. uint32_t CRC;
  255. // The variables bellow are nor part of the physical packet
  256. int streams_max; // How much streams are allocated
  257. int streams_num; // How much streams are initialized
  258. uint8_t initialized; // Set to 1 when full NIT table is initialized
  259. };
  260. struct ts_eit_stream {
  261. uint16_t event_id;
  262. uint64_t start_time_mjd : 16,
  263. start_time_bcd : 24, // Total 40, start_time
  264. duration_bcd : 24;
  265. uint16_t running_status : 3,
  266. free_CA_mode : 1,
  267. descriptor_size : 12;
  268. uint8_t *descriptor_data;
  269. };
  270. struct ts_eit {
  271. struct ts_header ts_header;
  272. struct ts_section_header *section_header;
  273. uint16_t transport_stream_id;
  274. uint16_t original_network_id;
  275. uint8_t segment_last_section_number;
  276. uint8_t last_table_id;
  277. struct ts_eit_stream **streams;
  278. uint32_t CRC;
  279. // The variables bellow are nor part of the physical packet
  280. int streams_max; // How much streams are allocated
  281. int streams_num; // How much streams are initialized
  282. uint8_t initialized; // Set to 1 when full eit table is initialized
  283. };
  284. struct ts_tdt {
  285. struct ts_header ts_header;
  286. uint8_t pointer_field;
  287. uint8_t table_id;
  288. uint16_t section_syntax_indicator: 1, // Section Syntax Indicator
  289. reserved_1 : 1, // 1 reserved bit
  290. reserved_2 : 2, // 2 reserved bits
  291. section_length : 12; // Section lenth
  292. uint16_t mjd; // This both are part of one 40 bit field (UTC_time)
  293. uint32_t bcd; // Only 24 bits are used
  294. // The below fields are only in TOT packets, table_id 0x73
  295. uint16_t reserved_3 : 4,
  296. descriptors_size : 12;
  297. uint8_t *descriptors;
  298. uint32_t CRC;
  299. // The variables bellow are nor part of the physical packet
  300. uint8_t *packet_data;
  301. time_t utc; // decoded UTC_time
  302. struct tm tm; // decoded UTC_time
  303. uint8_t initialized;
  304. };
  305. // PMT stream types
  306. enum ts_stream_type {
  307. STREAM_TYPE_MPEG1_VIDEO = 0x01, // MPEG-1 video
  308. STREAM_TYPE_MPEG2_VIDEO = 0x02, // H.262 - MPEG-2 video
  309. STREAM_TYPE_MPEG1_AUDIO = 0x03, // MPEG-1 audio
  310. STREAM_TYPE_MPEG2_AUDIO = 0x04, // MPEG-2 audio
  311. STREAM_TYPE_ADTS_AUDIO = 0x0F, // AAC ADTS
  312. STREAM_TYPE_MPEG4_PART2_VIDEO = 0x10, // DIVX - MPEG-4 part 2
  313. STREAM_TYPE_AVC_VIDEO = 0x1B, // H.264 - MPEG-4 part 10
  314. STREAM_TYPE_AVS_VIDEO = 0x42, // Chinese AVS
  315. STREAM_TYPE_DOLBY_DVB_AUDIO = 0x06, // 0x06 - Private stream, look at stream descriptors for AC-3 descriptor
  316. STREAM_TYPE_DOLBY_ATSC_AUDIO = 0x81, // 0x81 - Private stream in ATSC (US system, probably we shouldn't care)
  317. };
  318. // ------------------------------------------------------------
  319. // PES packet stream ids
  320. // See H.222.0 Table 2-17 and Table 2-18
  321. #define STREAM_ID_PROGRAM_STREAM_MAP 0xbc
  322. #define STREAM_ID_PRIVATE_STREAM_1 0xbd
  323. #define STREAM_ID_PADDING_STREAM 0xbe
  324. #define STREAM_ID_PRIVATE_STREAM_2 0xbf
  325. #define STREAM_ID_ECM_STREAM 0xf0
  326. #define STREAM_ID_EMM_STREAM 0xf1
  327. #define STREAM_ID_DSMCC_STREAM 0xf2
  328. #define STREAM_ID_13522_STREAM 0xf3
  329. #define STREAM_ID_H222_A_STREAM 0xf4
  330. #define STREAM_ID_H222_B_STREAM 0xf5
  331. #define STREAM_ID_H222_C_STREAM 0xf6
  332. #define STREAM_ID_H222_D_STREAM 0xf7
  333. #define STREAM_ID_H222_E_STREAM 0xf8
  334. #define STREAM_ID_ANCILLARY_STREAM 0xf9
  335. #define STREAM_ID_PROGRAM_STREAM_DIRECTORY 0xff
  336. #define IS_AUDIO_STREAM_ID(id) ((id) >= 0xc0 && (id) <= 0xdf)
  337. #define IS_VIDEO_STREAM_ID(id) ((id) >= 0xe0 && (id) <= 0xef)
  338. #define IS_PES_STREAM_SUPPORTED(id) (!(id == STREAM_ID_PROGRAM_STREAM_MAP || \
  339. id == STREAM_ID_PADDING_STREAM || \
  340. id == STREAM_ID_PRIVATE_STREAM_2 || \
  341. id == STREAM_ID_ECM_STREAM || \
  342. id == STREAM_ID_EMM_STREAM || \
  343. id == STREAM_ID_PROGRAM_STREAM_DIRECTORY || \
  344. id == STREAM_ID_DSMCC_STREAM || \
  345. id == STREAM_ID_H222_E_STREAM))
  346. #endif