| 1 | /* |
| 2 | * MPEG1/2 demuxer |
| 3 | * Copyright (c) 2000, 2001, 2002 Fabrice Bellard |
| 4 | * |
| 5 | * This file is part of FFmpeg. |
| 6 | * |
| 7 | * FFmpeg is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU Lesser General Public |
| 9 | * License as published by the Free Software Foundation; either |
| 10 | * version 2.1 of the License, or (at your option) any later version. |
| 11 | * |
| 12 | * FFmpeg is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * Lesser General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU Lesser General Public |
| 18 | * License along with FFmpeg; if not, write to the Free Software |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 20 | */ |
| 21 | |
| 22 | #include "avformat.h" |
| 23 | #include "internal.h" |
| 24 | #include "mpeg.h" |
| 25 | |
| 26 | #if CONFIG_VOBSUB_DEMUXER |
| 27 | # include "subtitles.h" |
| 28 | # include "libavutil/bprint.h" |
| 29 | #endif |
| 30 | |
| 31 | #undef NDEBUG |
| 32 | #include <assert.h> |
| 33 | #include "libavutil/avassert.h" |
| 34 | |
| 35 | /*********************************************/ |
| 36 | /* demux code */ |
| 37 | |
| 38 | #define MAX_SYNC_SIZE 100000 |
| 39 | |
| 40 | static int check_pes(const uint8_t *p, const uint8_t *end) |
| 41 | { |
| 42 | int pes1; |
| 43 | int pes2 = (p[3] & 0xC0) == 0x80 && |
| 44 | (p[4] & 0xC0) != 0x40 && |
| 45 | ((p[4] & 0xC0) == 0x00 || |
| 46 | (p[4] & 0xC0) >> 2 == (p[6] & 0xF0)); |
| 47 | |
| 48 | for (p += 3; p < end && *p == 0xFF; p++) ; |
| 49 | if ((*p & 0xC0) == 0x40) |
| 50 | p += 2; |
| 51 | |
| 52 | if ((*p & 0xF0) == 0x20) |
| 53 | pes1 = p[0] & p[2] & p[4] & 1; |
| 54 | else if ((*p & 0xF0) == 0x30) |
| 55 | pes1 = p[0] & p[2] & p[4] & p[5] & p[7] & p[9] & 1; |
| 56 | else |
| 57 | pes1 = *p == 0x0F; |
| 58 | |
| 59 | return pes1 || pes2; |
| 60 | } |
| 61 | |
| 62 | static int check_pack_header(const uint8_t *buf) |
| 63 | { |
| 64 | return (buf[1] & 0xC0) == 0x40 || (buf[1] & 0xF0) == 0x20; |
| 65 | } |
| 66 | |
| 67 | static int mpegps_probe(AVProbeData *p) |
| 68 | { |
| 69 | uint32_t code = -1; |
| 70 | int i; |
| 71 | int sys = 0, pspack = 0, priv1 = 0, vid = 0; |
| 72 | int audio = 0, invalid = 0, score = 0; |
| 73 | |
| 74 | for (i = 0; i < p->buf_size; i++) { |
| 75 | code = (code << 8) + p->buf[i]; |
| 76 | if ((code & 0xffffff00) == 0x100) { |
| 77 | int len = p->buf[i + 1] << 8 | p->buf[i + 2]; |
| 78 | int pes = check_pes(p->buf + i, p->buf + p->buf_size); |
| 79 | int pack = check_pack_header(p->buf + i); |
| 80 | |
| 81 | if (code == SYSTEM_HEADER_START_CODE) |
| 82 | sys++; |
| 83 | else if (code == PACK_START_CODE && pack) |
| 84 | pspack++; |
| 85 | else if ((code & 0xf0) == VIDEO_ID && pes) |
| 86 | vid++; |
| 87 | // skip pes payload to avoid start code emulation for private |
| 88 | // and audio streams |
| 89 | else if ((code & 0xe0) == AUDIO_ID && pes) {audio++; i+=len;} |
| 90 | else if (code == PRIVATE_STREAM_1 && pes) {priv1++; i+=len;} |
| 91 | else if (code == 0x1fd && pes) vid++; //VC1 |
| 92 | |
| 93 | else if ((code & 0xf0) == VIDEO_ID && !pes) invalid++; |
| 94 | else if ((code & 0xe0) == AUDIO_ID && !pes) invalid++; |
| 95 | else if (code == PRIVATE_STREAM_1 && !pes) invalid++; |
| 96 | } |
| 97 | } |
| 98 | |
| 99 | if (vid + audio > invalid + 1) /* invalid VDR files nd short PES streams */ |
| 100 | score = AVPROBE_SCORE_EXTENSION / 2; |
| 101 | |
| 102 | if (sys > invalid && sys * 9 <= pspack * 10) |
| 103 | return (audio > 12 || vid > 3 || pspack > 2) ? AVPROBE_SCORE_EXTENSION + 2 |
| 104 | : AVPROBE_SCORE_EXTENSION / 2 + 1; // 1 more than mp3 |
| 105 | if (pspack > invalid && (priv1 + vid + audio) * 10 >= pspack * 9) |
| 106 | return pspack > 2 ? AVPROBE_SCORE_EXTENSION + 2 |
| 107 | : AVPROBE_SCORE_EXTENSION / 2; // 1 more than .mpg |
| 108 | if ((!!vid ^ !!audio) && (audio > 4 || vid > 1) && !sys && |
| 109 | !pspack && p->buf_size > 2048 && vid + audio > invalid) /* PES stream */ |
| 110 | return (audio > 12 || vid > 3 + 2 * invalid) ? AVPROBE_SCORE_EXTENSION + 2 |
| 111 | : AVPROBE_SCORE_EXTENSION / 2; |
| 112 | |
| 113 | // 02-Penguin.flac has sys:0 priv1:0 pspack:0 vid:0 audio:1 |
| 114 | // mp3_misidentified_2.mp3 has sys:0 priv1:0 pspack:0 vid:0 audio:6 |
| 115 | // Have\ Yourself\ a\ Merry\ Little\ Christmas.mp3 0 0 0 5 0 1 len:21618 |
| 116 | return score; |
| 117 | } |
| 118 | |
| 119 | typedef struct MpegDemuxContext { |
| 120 | int32_t header_state; |
| 121 | unsigned char psm_es_type[256]; |
| 122 | int sofdec; |
| 123 | int dvd; |
| 124 | int imkh_cctv; |
| 125 | #if CONFIG_VOBSUB_DEMUXER |
| 126 | AVFormatContext *sub_ctx; |
| 127 | FFDemuxSubtitlesQueue q[32]; |
| 128 | #endif |
| 129 | } MpegDemuxContext; |
| 130 | |
| 131 | static int mpegps_read_header(AVFormatContext *s) |
| 132 | { |
| 133 | MpegDemuxContext *m = s->priv_data; |
| 134 | char buffer[7]; |
| 135 | int64_t last_pos = avio_tell(s->pb); |
| 136 | |
| 137 | m->header_state = 0xff; |
| 138 | s->ctx_flags |= AVFMTCTX_NOHEADER; |
| 139 | |
| 140 | avio_get_str(s->pb, 6, buffer, sizeof(buffer)); |
| 141 | if (!memcmp("IMKH", buffer, 4)) { |
| 142 | m->imkh_cctv = 1; |
| 143 | } else if (!memcmp("Sofdec", buffer, 6)) { |
| 144 | m->sofdec = 1; |
| 145 | } else |
| 146 | avio_seek(s->pb, last_pos, SEEK_SET); |
| 147 | |
| 148 | /* no need to do more */ |
| 149 | return 0; |
| 150 | } |
| 151 | |
| 152 | static int64_t get_pts(AVIOContext *pb, int c) |
| 153 | { |
| 154 | uint8_t buf[5]; |
| 155 | |
| 156 | buf[0] = c < 0 ? avio_r8(pb) : c; |
| 157 | avio_read(pb, buf + 1, 4); |
| 158 | |
| 159 | return ff_parse_pes_pts(buf); |
| 160 | } |
| 161 | |
| 162 | static int find_next_start_code(AVIOContext *pb, int *size_ptr, |
| 163 | int32_t *header_state) |
| 164 | { |
| 165 | unsigned int state, v; |
| 166 | int val, n; |
| 167 | |
| 168 | state = *header_state; |
| 169 | n = *size_ptr; |
| 170 | while (n > 0) { |
| 171 | if (avio_feof(pb)) |
| 172 | break; |
| 173 | v = avio_r8(pb); |
| 174 | n--; |
| 175 | if (state == 0x000001) { |
| 176 | state = ((state << 8) | v) & 0xffffff; |
| 177 | val = state; |
| 178 | goto found; |
| 179 | } |
| 180 | state = ((state << 8) | v) & 0xffffff; |
| 181 | } |
| 182 | val = -1; |
| 183 | |
| 184 | found: |
| 185 | *header_state = state; |
| 186 | *size_ptr = n; |
| 187 | return val; |
| 188 | } |
| 189 | |
| 190 | /** |
| 191 | * Extract stream types from a program stream map |
| 192 | * According to ISO/IEC 13818-1 ('MPEG-2 Systems') table 2-35 |
| 193 | * |
| 194 | * @return number of bytes occupied by PSM in the bitstream |
| 195 | */ |
| 196 | static long mpegps_psm_parse(MpegDemuxContext *m, AVIOContext *pb) |
| 197 | { |
| 198 | int psm_length, ps_info_length, es_map_length; |
| 199 | |
| 200 | psm_length = avio_rb16(pb); |
| 201 | avio_r8(pb); |
| 202 | avio_r8(pb); |
| 203 | ps_info_length = avio_rb16(pb); |
| 204 | |
| 205 | /* skip program_stream_info */ |
| 206 | avio_skip(pb, ps_info_length); |
| 207 | es_map_length = avio_rb16(pb); |
| 208 | /* Ignore es_map_length, trust psm_length */ |
| 209 | es_map_length = psm_length - ps_info_length - 10; |
| 210 | |
| 211 | /* at least one es available? */ |
| 212 | while (es_map_length >= 4) { |
| 213 | unsigned char type = avio_r8(pb); |
| 214 | unsigned char es_id = avio_r8(pb); |
| 215 | uint16_t es_info_length = avio_rb16(pb); |
| 216 | |
| 217 | /* remember mapping from stream id to stream type */ |
| 218 | m->psm_es_type[es_id] = type; |
| 219 | /* skip program_stream_info */ |
| 220 | avio_skip(pb, es_info_length); |
| 221 | es_map_length -= 4 + es_info_length; |
| 222 | } |
| 223 | avio_rb32(pb); /* crc32 */ |
| 224 | return 2 + psm_length; |
| 225 | } |
| 226 | |
| 227 | /* read the next PES header. Return its position in ppos |
| 228 | * (if not NULL), and its start code, pts and dts. |
| 229 | */ |
| 230 | static int mpegps_read_pes_header(AVFormatContext *s, |
| 231 | int64_t *ppos, int *pstart_code, |
| 232 | int64_t *ppts, int64_t *pdts) |
| 233 | { |
| 234 | MpegDemuxContext *m = s->priv_data; |
| 235 | int len, size, startcode, c, flags, header_len; |
| 236 | int pes_ext, ext2_len, id_ext, skip; |
| 237 | int64_t pts, dts; |
| 238 | int64_t last_sync = avio_tell(s->pb); |
| 239 | |
| 240 | error_redo: |
| 241 | avio_seek(s->pb, last_sync, SEEK_SET); |
| 242 | redo: |
| 243 | /* next start code (should be immediately after) */ |
| 244 | m->header_state = 0xff; |
| 245 | size = MAX_SYNC_SIZE; |
| 246 | startcode = find_next_start_code(s->pb, &size, &m->header_state); |
| 247 | last_sync = avio_tell(s->pb); |
| 248 | if (startcode < 0) { |
| 249 | if (avio_feof(s->pb)) |
| 250 | return AVERROR_EOF; |
| 251 | // FIXME we should remember header_state |
| 252 | return AVERROR(EAGAIN); |
| 253 | } |
| 254 | |
| 255 | if (startcode == PACK_START_CODE) |
| 256 | goto redo; |
| 257 | if (startcode == SYSTEM_HEADER_START_CODE) |
| 258 | goto redo; |
| 259 | if (startcode == PADDING_STREAM) { |
| 260 | avio_skip(s->pb, avio_rb16(s->pb)); |
| 261 | goto redo; |
| 262 | } |
| 263 | if (startcode == PRIVATE_STREAM_2) { |
| 264 | if (!m->sofdec) { |
| 265 | /* Need to detect whether this from a DVD or a 'Sofdec' stream */ |
| 266 | int len = avio_rb16(s->pb); |
| 267 | int bytesread = 0; |
| 268 | uint8_t *ps2buf = av_malloc(len); |
| 269 | |
| 270 | if (ps2buf) { |
| 271 | bytesread = avio_read(s->pb, ps2buf, len); |
| 272 | |
| 273 | if (bytesread != len) { |
| 274 | avio_skip(s->pb, len - bytesread); |
| 275 | } else { |
| 276 | uint8_t *p = 0; |
| 277 | if (len >= 6) |
| 278 | p = memchr(ps2buf, 'S', len - 5); |
| 279 | |
| 280 | if (p) |
| 281 | m->sofdec = !memcmp(p+1, "ofdec", 5); |
| 282 | |
| 283 | m->sofdec -= !m->sofdec; |
| 284 | |
| 285 | if (m->sofdec < 0) { |
| 286 | if (len == 980 && ps2buf[0] == 0) { |
| 287 | /* PCI structure? */ |
| 288 | uint32_t startpts = AV_RB32(ps2buf + 0x0d); |
| 289 | uint32_t endpts = AV_RB32(ps2buf + 0x11); |
| 290 | uint8_t hours = ((ps2buf[0x19] >> 4) * 10) + (ps2buf[0x19] & 0x0f); |
| 291 | uint8_t mins = ((ps2buf[0x1a] >> 4) * 10) + (ps2buf[0x1a] & 0x0f); |
| 292 | uint8_t secs = ((ps2buf[0x1b] >> 4) * 10) + (ps2buf[0x1b] & 0x0f); |
| 293 | |
| 294 | m->dvd = (hours <= 23 && |
| 295 | mins <= 59 && |
| 296 | secs <= 59 && |
| 297 | (ps2buf[0x19] & 0x0f) < 10 && |
| 298 | (ps2buf[0x1a] & 0x0f) < 10 && |
| 299 | (ps2buf[0x1b] & 0x0f) < 10 && |
| 300 | endpts >= startpts); |
| 301 | } else if (len == 1018 && ps2buf[0] == 1) { |
| 302 | /* DSI structure? */ |
| 303 | uint8_t hours = ((ps2buf[0x1d] >> 4) * 10) + (ps2buf[0x1d] & 0x0f); |
| 304 | uint8_t mins = ((ps2buf[0x1e] >> 4) * 10) + (ps2buf[0x1e] & 0x0f); |
| 305 | uint8_t secs = ((ps2buf[0x1f] >> 4) * 10) + (ps2buf[0x1f] & 0x0f); |
| 306 | |
| 307 | m->dvd = (hours <= 23 && |
| 308 | mins <= 59 && |
| 309 | secs <= 59 && |
| 310 | (ps2buf[0x1d] & 0x0f) < 10 && |
| 311 | (ps2buf[0x1e] & 0x0f) < 10 && |
| 312 | (ps2buf[0x1f] & 0x0f) < 10); |
| 313 | } |
| 314 | } |
| 315 | } |
| 316 | |
| 317 | av_free(ps2buf); |
| 318 | |
| 319 | /* If this isn't a DVD packet or no memory |
| 320 | * could be allocated, just ignore it. |
| 321 | * If we did, move back to the start of the |
| 322 | * packet (plus 'length' field) */ |
| 323 | if (!m->dvd || avio_skip(s->pb, -(len + 2)) < 0) { |
| 324 | /* Skip back failed. |
| 325 | * This packet will be lost but that can't be helped |
| 326 | * if we can't skip back |
| 327 | */ |
| 328 | goto redo; |
| 329 | } |
| 330 | } else { |
| 331 | /* No memory */ |
| 332 | avio_skip(s->pb, len); |
| 333 | goto redo; |
| 334 | } |
| 335 | } else if (!m->dvd) { |
| 336 | int len = avio_rb16(s->pb); |
| 337 | avio_skip(s->pb, len); |
| 338 | goto redo; |
| 339 | } |
| 340 | } |
| 341 | if (startcode == PROGRAM_STREAM_MAP) { |
| 342 | mpegps_psm_parse(m, s->pb); |
| 343 | goto redo; |
| 344 | } |
| 345 | |
| 346 | /* find matching stream */ |
| 347 | if (!((startcode >= 0x1c0 && startcode <= 0x1df) || |
| 348 | (startcode >= 0x1e0 && startcode <= 0x1ef) || |
| 349 | (startcode == 0x1bd) || |
| 350 | (startcode == PRIVATE_STREAM_2) || |
| 351 | (startcode == 0x1fd))) |
| 352 | goto redo; |
| 353 | if (ppos) { |
| 354 | *ppos = avio_tell(s->pb) - 4; |
| 355 | } |
| 356 | len = avio_rb16(s->pb); |
| 357 | pts = |
| 358 | dts = AV_NOPTS_VALUE; |
| 359 | if (startcode != PRIVATE_STREAM_2) |
| 360 | { |
| 361 | /* stuffing */ |
| 362 | for (;;) { |
| 363 | if (len < 1) |
| 364 | goto error_redo; |
| 365 | c = avio_r8(s->pb); |
| 366 | len--; |
| 367 | /* XXX: for mpeg1, should test only bit 7 */ |
| 368 | if (c != 0xff) |
| 369 | break; |
| 370 | } |
| 371 | if ((c & 0xc0) == 0x40) { |
| 372 | /* buffer scale & size */ |
| 373 | avio_r8(s->pb); |
| 374 | c = avio_r8(s->pb); |
| 375 | len -= 2; |
| 376 | } |
| 377 | if ((c & 0xe0) == 0x20) { |
| 378 | dts = |
| 379 | pts = get_pts(s->pb, c); |
| 380 | len -= 4; |
| 381 | if (c & 0x10) { |
| 382 | dts = get_pts(s->pb, -1); |
| 383 | len -= 5; |
| 384 | } |
| 385 | } else if ((c & 0xc0) == 0x80) { |
| 386 | /* mpeg 2 PES */ |
| 387 | flags = avio_r8(s->pb); |
| 388 | header_len = avio_r8(s->pb); |
| 389 | len -= 2; |
| 390 | if (header_len > len) |
| 391 | goto error_redo; |
| 392 | len -= header_len; |
| 393 | if (flags & 0x80) { |
| 394 | dts = pts = get_pts(s->pb, -1); |
| 395 | header_len -= 5; |
| 396 | if (flags & 0x40) { |
| 397 | dts = get_pts(s->pb, -1); |
| 398 | header_len -= 5; |
| 399 | } |
| 400 | } |
| 401 | if (flags & 0x3f && header_len == 0) { |
| 402 | flags &= 0xC0; |
| 403 | av_log(s, AV_LOG_WARNING, "Further flags set but no bytes left\n"); |
| 404 | } |
| 405 | if (flags & 0x01) { /* PES extension */ |
| 406 | pes_ext = avio_r8(s->pb); |
| 407 | header_len--; |
| 408 | /* Skip PES private data, program packet sequence counter |
| 409 | * and P-STD buffer */ |
| 410 | skip = (pes_ext >> 4) & 0xb; |
| 411 | skip += skip & 0x9; |
| 412 | if (pes_ext & 0x40 || skip > header_len) { |
| 413 | av_log(s, AV_LOG_WARNING, "pes_ext %X is invalid\n", pes_ext); |
| 414 | pes_ext = skip = 0; |
| 415 | } |
| 416 | avio_skip(s->pb, skip); |
| 417 | header_len -= skip; |
| 418 | |
| 419 | if (pes_ext & 0x01) { /* PES extension 2 */ |
| 420 | ext2_len = avio_r8(s->pb); |
| 421 | header_len--; |
| 422 | if ((ext2_len & 0x7f) > 0) { |
| 423 | id_ext = avio_r8(s->pb); |
| 424 | if ((id_ext & 0x80) == 0) |
| 425 | startcode = ((startcode & 0xff) << 8) | id_ext; |
| 426 | header_len--; |
| 427 | } |
| 428 | } |
| 429 | } |
| 430 | if (header_len < 0) |
| 431 | goto error_redo; |
| 432 | avio_skip(s->pb, header_len); |
| 433 | } else if (c != 0xf) |
| 434 | goto redo; |
| 435 | } |
| 436 | |
| 437 | if (startcode == PRIVATE_STREAM_1) { |
| 438 | startcode = avio_r8(s->pb); |
| 439 | len--; |
| 440 | } |
| 441 | if (len < 0) |
| 442 | goto error_redo; |
| 443 | if (dts != AV_NOPTS_VALUE && ppos) { |
| 444 | int i; |
| 445 | for (i = 0; i < s->nb_streams; i++) { |
| 446 | if (startcode == s->streams[i]->id && |
| 447 | s->pb->seekable /* index useless on streams anyway */) { |
| 448 | ff_reduce_index(s, i); |
| 449 | av_add_index_entry(s->streams[i], *ppos, dts, 0, 0, |
| 450 | AVINDEX_KEYFRAME /* FIXME keyframe? */); |
| 451 | } |
| 452 | } |
| 453 | } |
| 454 | |
| 455 | *pstart_code = startcode; |
| 456 | *ppts = pts; |
| 457 | *pdts = dts; |
| 458 | return len; |
| 459 | } |
| 460 | |
| 461 | static int mpegps_read_packet(AVFormatContext *s, |
| 462 | AVPacket *pkt) |
| 463 | { |
| 464 | MpegDemuxContext *m = s->priv_data; |
| 465 | AVStream *st; |
| 466 | int len, startcode, i, es_type, ret; |
| 467 | int lpcm_header_len = -1; //Init to suppress warning |
| 468 | int request_probe= 0; |
| 469 | enum AVCodecID codec_id = AV_CODEC_ID_NONE; |
| 470 | enum AVMediaType type; |
| 471 | int64_t pts, dts, dummy_pos; // dummy_pos is needed for the index building to work |
| 472 | |
| 473 | redo: |
| 474 | len = mpegps_read_pes_header(s, &dummy_pos, &startcode, &pts, &dts); |
| 475 | if (len < 0) |
| 476 | return len; |
| 477 | |
| 478 | if (startcode >= 0x80 && startcode <= 0xcf) { |
| 479 | if (len < 4) |
| 480 | goto skip; |
| 481 | |
| 482 | /* audio: skip header */ |
| 483 | avio_r8(s->pb); |
| 484 | lpcm_header_len = avio_rb16(s->pb); |
| 485 | len -= 3; |
| 486 | if (startcode >= 0xb0 && startcode <= 0xbf) { |
| 487 | /* MLP/TrueHD audio has a 4-byte header */ |
| 488 | avio_r8(s->pb); |
| 489 | len--; |
| 490 | } |
| 491 | } |
| 492 | |
| 493 | /* now find stream */ |
| 494 | for (i = 0; i < s->nb_streams; i++) { |
| 495 | st = s->streams[i]; |
| 496 | if (st->id == startcode) |
| 497 | goto found; |
| 498 | } |
| 499 | |
| 500 | es_type = m->psm_es_type[startcode & 0xff]; |
| 501 | if (es_type == STREAM_TYPE_VIDEO_MPEG1) { |
| 502 | codec_id = AV_CODEC_ID_MPEG2VIDEO; |
| 503 | type = AVMEDIA_TYPE_VIDEO; |
| 504 | } else if (es_type == STREAM_TYPE_VIDEO_MPEG2) { |
| 505 | codec_id = AV_CODEC_ID_MPEG2VIDEO; |
| 506 | type = AVMEDIA_TYPE_VIDEO; |
| 507 | } else if (es_type == STREAM_TYPE_AUDIO_MPEG1 || |
| 508 | es_type == STREAM_TYPE_AUDIO_MPEG2) { |
| 509 | codec_id = AV_CODEC_ID_MP3; |
| 510 | type = AVMEDIA_TYPE_AUDIO; |
| 511 | } else if (es_type == STREAM_TYPE_AUDIO_AAC) { |
| 512 | codec_id = AV_CODEC_ID_AAC; |
| 513 | type = AVMEDIA_TYPE_AUDIO; |
| 514 | } else if (es_type == STREAM_TYPE_VIDEO_MPEG4) { |
| 515 | codec_id = AV_CODEC_ID_MPEG4; |
| 516 | type = AVMEDIA_TYPE_VIDEO; |
| 517 | } else if (es_type == STREAM_TYPE_VIDEO_H264) { |
| 518 | codec_id = AV_CODEC_ID_H264; |
| 519 | type = AVMEDIA_TYPE_VIDEO; |
| 520 | } else if (es_type == STREAM_TYPE_AUDIO_AC3) { |
| 521 | codec_id = AV_CODEC_ID_AC3; |
| 522 | type = AVMEDIA_TYPE_AUDIO; |
| 523 | } else if (m->imkh_cctv && es_type == 0x91) { |
| 524 | codec_id = AV_CODEC_ID_PCM_MULAW; |
| 525 | type = AVMEDIA_TYPE_AUDIO; |
| 526 | } else if (startcode >= 0x1e0 && startcode <= 0x1ef) { |
| 527 | static const unsigned char avs_seqh[4] = { 0, 0, 1, 0xb0 }; |
| 528 | unsigned char buf[8]; |
| 529 | |
| 530 | avio_read(s->pb, buf, 8); |
| 531 | avio_seek(s->pb, -8, SEEK_CUR); |
| 532 | if (!memcmp(buf, avs_seqh, 4) && (buf[6] != 0 || buf[7] != 1)) |
| 533 | codec_id = AV_CODEC_ID_CAVS; |
| 534 | else |
| 535 | request_probe= 1; |
| 536 | type = AVMEDIA_TYPE_VIDEO; |
| 537 | } else if (startcode == PRIVATE_STREAM_2) { |
| 538 | type = AVMEDIA_TYPE_DATA; |
| 539 | codec_id = AV_CODEC_ID_DVD_NAV; |
| 540 | } else if (startcode >= 0x1c0 && startcode <= 0x1df) { |
| 541 | type = AVMEDIA_TYPE_AUDIO; |
| 542 | if (m->sofdec > 0) { |
| 543 | codec_id = AV_CODEC_ID_ADPCM_ADX; |
| 544 | // Auto-detect AC-3 |
| 545 | request_probe = 50; |
| 546 | } else { |
| 547 | codec_id = AV_CODEC_ID_MP2; |
| 548 | } |
| 549 | } else if (startcode >= 0x80 && startcode <= 0x87) { |
| 550 | type = AVMEDIA_TYPE_AUDIO; |
| 551 | codec_id = AV_CODEC_ID_AC3; |
| 552 | } else if ((startcode >= 0x88 && startcode <= 0x8f) || |
| 553 | (startcode >= 0x98 && startcode <= 0x9f)) { |
| 554 | /* 0x90 - 0x97 is reserved for SDDS in DVD specs */ |
| 555 | type = AVMEDIA_TYPE_AUDIO; |
| 556 | codec_id = AV_CODEC_ID_DTS; |
| 557 | } else if (startcode >= 0xa0 && startcode <= 0xaf) { |
| 558 | type = AVMEDIA_TYPE_AUDIO; |
| 559 | if (lpcm_header_len == 6) { |
| 560 | codec_id = AV_CODEC_ID_MLP; |
| 561 | } else { |
| 562 | codec_id = AV_CODEC_ID_PCM_DVD; |
| 563 | } |
| 564 | } else if (startcode >= 0xb0 && startcode <= 0xbf) { |
| 565 | type = AVMEDIA_TYPE_AUDIO; |
| 566 | codec_id = AV_CODEC_ID_TRUEHD; |
| 567 | } else if (startcode >= 0xc0 && startcode <= 0xcf) { |
| 568 | /* Used for both AC-3 and E-AC-3 in EVOB files */ |
| 569 | type = AVMEDIA_TYPE_AUDIO; |
| 570 | codec_id = AV_CODEC_ID_AC3; |
| 571 | } else if (startcode >= 0x20 && startcode <= 0x3f) { |
| 572 | type = AVMEDIA_TYPE_SUBTITLE; |
| 573 | codec_id = AV_CODEC_ID_DVD_SUBTITLE; |
| 574 | } else if (startcode >= 0xfd55 && startcode <= 0xfd5f) { |
| 575 | type = AVMEDIA_TYPE_VIDEO; |
| 576 | codec_id = AV_CODEC_ID_VC1; |
| 577 | } else { |
| 578 | skip: |
| 579 | /* skip packet */ |
| 580 | avio_skip(s->pb, len); |
| 581 | goto redo; |
| 582 | } |
| 583 | /* no stream found: add a new stream */ |
| 584 | st = avformat_new_stream(s, NULL); |
| 585 | if (!st) |
| 586 | goto skip; |
| 587 | st->id = startcode; |
| 588 | st->codec->codec_type = type; |
| 589 | st->codec->codec_id = codec_id; |
| 590 | if (st->codec->codec_id == AV_CODEC_ID_PCM_MULAW) { |
| 591 | st->codec->channels = 1; |
| 592 | st->codec->channel_layout = AV_CH_LAYOUT_MONO; |
| 593 | st->codec->sample_rate = 8000; |
| 594 | } |
| 595 | st->request_probe = request_probe; |
| 596 | st->need_parsing = AVSTREAM_PARSE_FULL; |
| 597 | |
| 598 | found: |
| 599 | if (st->discard >= AVDISCARD_ALL) |
| 600 | goto skip; |
| 601 | if (startcode >= 0xa0 && startcode <= 0xaf) { |
| 602 | if (lpcm_header_len == 6 && st->codec->codec_id == AV_CODEC_ID_MLP) { |
| 603 | if (len < 6) |
| 604 | goto skip; |
| 605 | avio_skip(s->pb, 6); |
| 606 | len -=6; |
| 607 | } |
| 608 | } |
| 609 | ret = av_get_packet(s->pb, pkt, len); |
| 610 | |
| 611 | pkt->pts = pts; |
| 612 | pkt->dts = dts; |
| 613 | pkt->pos = dummy_pos; |
| 614 | pkt->stream_index = st->index; |
| 615 | av_dlog(s, "%d: pts=%0.3f dts=%0.3f size=%d\n", |
| 616 | pkt->stream_index, pkt->pts / 90000.0, pkt->dts / 90000.0, |
| 617 | pkt->size); |
| 618 | |
| 619 | return (ret < 0) ? ret : 0; |
| 620 | } |
| 621 | |
| 622 | static int64_t mpegps_read_dts(AVFormatContext *s, int stream_index, |
| 623 | int64_t *ppos, int64_t pos_limit) |
| 624 | { |
| 625 | int len, startcode; |
| 626 | int64_t pos, pts, dts; |
| 627 | |
| 628 | pos = *ppos; |
| 629 | if (avio_seek(s->pb, pos, SEEK_SET) < 0) |
| 630 | return AV_NOPTS_VALUE; |
| 631 | |
| 632 | for (;;) { |
| 633 | len = mpegps_read_pes_header(s, &pos, &startcode, &pts, &dts); |
| 634 | if (len < 0) { |
| 635 | av_dlog(s, "none (ret=%d)\n", len); |
| 636 | return AV_NOPTS_VALUE; |
| 637 | } |
| 638 | if (startcode == s->streams[stream_index]->id && |
| 639 | dts != AV_NOPTS_VALUE) { |
| 640 | break; |
| 641 | } |
| 642 | avio_skip(s->pb, len); |
| 643 | } |
| 644 | av_dlog(s, "pos=0x%"PRIx64" dts=0x%"PRIx64" %0.3f\n", |
| 645 | pos, dts, dts / 90000.0); |
| 646 | *ppos = pos; |
| 647 | return dts; |
| 648 | } |
| 649 | |
| 650 | AVInputFormat ff_mpegps_demuxer = { |
| 651 | .name = "mpeg", |
| 652 | .long_name = NULL_IF_CONFIG_SMALL("MPEG-PS (MPEG-2 Program Stream)"), |
| 653 | .priv_data_size = sizeof(MpegDemuxContext), |
| 654 | .read_probe = mpegps_probe, |
| 655 | .read_header = mpegps_read_header, |
| 656 | .read_packet = mpegps_read_packet, |
| 657 | .read_timestamp = mpegps_read_dts, |
| 658 | .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT, |
| 659 | }; |
| 660 | |
| 661 | #if CONFIG_VOBSUB_DEMUXER |
| 662 | |
| 663 | #define REF_STRING "# VobSub index file," |
| 664 | #define MAX_LINE_SIZE 2048 |
| 665 | |
| 666 | static int vobsub_probe(AVProbeData *p) |
| 667 | { |
| 668 | if (!strncmp(p->buf, REF_STRING, sizeof(REF_STRING) - 1)) |
| 669 | return AVPROBE_SCORE_MAX; |
| 670 | return 0; |
| 671 | } |
| 672 | |
| 673 | static int vobsub_read_header(AVFormatContext *s) |
| 674 | { |
| 675 | int i, ret = 0, header_parsed = 0, langidx = 0; |
| 676 | MpegDemuxContext *vobsub = s->priv_data; |
| 677 | char *sub_name = NULL; |
| 678 | size_t fname_len; |
| 679 | char *ext, *header_str; |
| 680 | AVBPrint header; |
| 681 | int64_t delay = 0; |
| 682 | AVStream *st = NULL; |
| 683 | int stream_id = -1; |
| 684 | char id[64] = {0}; |
| 685 | char alt[MAX_LINE_SIZE] = {0}; |
| 686 | AVInputFormat *iformat; |
| 687 | |
| 688 | sub_name = av_strdup(s->filename); |
| 689 | fname_len = strlen(sub_name); |
| 690 | ext = sub_name - 3 + fname_len; |
| 691 | if (fname_len < 4 || *(ext - 1) != '.') { |
| 692 | av_log(s, AV_LOG_ERROR, "The input index filename is too short " |
| 693 | "to guess the associated .SUB file\n"); |
| 694 | ret = AVERROR_INVALIDDATA; |
| 695 | goto end; |
| 696 | } |
| 697 | memcpy(ext, !strncmp(ext, "IDX", 3) ? "SUB" : "sub", 3); |
| 698 | av_log(s, AV_LOG_VERBOSE, "IDX/SUB: %s -> %s\n", s->filename, sub_name); |
| 699 | |
| 700 | if (!(iformat = av_find_input_format("mpeg"))) { |
| 701 | ret = AVERROR_DEMUXER_NOT_FOUND; |
| 702 | goto end; |
| 703 | } |
| 704 | |
| 705 | vobsub->sub_ctx = avformat_alloc_context(); |
| 706 | if (!vobsub->sub_ctx) { |
| 707 | ret = AVERROR(ENOMEM); |
| 708 | goto end; |
| 709 | } |
| 710 | |
| 711 | if ((ret = ff_copy_whitelists(vobsub->sub_ctx, s)) < 0) |
| 712 | goto end; |
| 713 | |
| 714 | ret = avformat_open_input(&vobsub->sub_ctx, sub_name, iformat, NULL); |
| 715 | if (ret < 0) { |
| 716 | av_log(s, AV_LOG_ERROR, "Unable to open %s as MPEG subtitles\n", sub_name); |
| 717 | goto end; |
| 718 | } |
| 719 | |
| 720 | av_bprint_init(&header, 0, AV_BPRINT_SIZE_UNLIMITED); |
| 721 | while (!avio_feof(s->pb)) { |
| 722 | char line[MAX_LINE_SIZE]; |
| 723 | int len = ff_get_line(s->pb, line, sizeof(line)); |
| 724 | |
| 725 | if (!len) |
| 726 | break; |
| 727 | |
| 728 | line[strcspn(line, "\r\n")] = 0; |
| 729 | |
| 730 | if (!strncmp(line, "id:", 3)) { |
| 731 | if (sscanf(line, "id: %63[^,], index: %u", id, &stream_id) != 2) { |
| 732 | av_log(s, AV_LOG_WARNING, "Unable to parse index line '%s', " |
| 733 | "assuming 'id: und, index: 0'\n", line); |
| 734 | strcpy(id, "und"); |
| 735 | stream_id = 0; |
| 736 | } |
| 737 | |
| 738 | if (stream_id >= FF_ARRAY_ELEMS(vobsub->q)) { |
| 739 | av_log(s, AV_LOG_ERROR, "Maximum number of subtitles streams reached\n"); |
| 740 | ret = AVERROR(EINVAL); |
| 741 | goto end; |
| 742 | } |
| 743 | |
| 744 | header_parsed = 1; |
| 745 | alt[0] = '\0'; |
| 746 | /* We do not create the stream immediately to avoid adding empty |
| 747 | * streams. See the following timestamp entry. */ |
| 748 | |
| 749 | av_log(s, AV_LOG_DEBUG, "IDX stream[%d] id=%s\n", stream_id, id); |
| 750 | |
| 751 | } else if (!strncmp(line, "timestamp:", 10)) { |
| 752 | AVPacket *sub; |
| 753 | int hh, mm, ss, ms; |
| 754 | int64_t pos, timestamp; |
| 755 | const char *p = line + 10; |
| 756 | |
| 757 | if (stream_id == -1) { |
| 758 | av_log(s, AV_LOG_ERROR, "Timestamp declared before any stream\n"); |
| 759 | ret = AVERROR_INVALIDDATA; |
| 760 | goto end; |
| 761 | } |
| 762 | |
| 763 | if (!st || st->id != stream_id) { |
| 764 | st = avformat_new_stream(s, NULL); |
| 765 | if (!st) { |
| 766 | ret = AVERROR(ENOMEM); |
| 767 | goto end; |
| 768 | } |
| 769 | st->id = stream_id; |
| 770 | st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE; |
| 771 | st->codec->codec_id = AV_CODEC_ID_DVD_SUBTITLE; |
| 772 | avpriv_set_pts_info(st, 64, 1, 1000); |
| 773 | av_dict_set(&st->metadata, "language", id, 0); |
| 774 | if (alt[0]) |
| 775 | av_dict_set(&st->metadata, "title", alt, 0); |
| 776 | } |
| 777 | |
| 778 | if (sscanf(p, "%02d:%02d:%02d:%03d, filepos: %"SCNx64, |
| 779 | &hh, &mm, &ss, &ms, &pos) != 5) { |
| 780 | av_log(s, AV_LOG_ERROR, "Unable to parse timestamp line '%s', " |
| 781 | "abort parsing\n", line); |
| 782 | ret = AVERROR_INVALIDDATA; |
| 783 | goto end; |
| 784 | } |
| 785 | timestamp = (hh*3600LL + mm*60LL + ss) * 1000LL + ms + delay; |
| 786 | timestamp = av_rescale_q(timestamp, av_make_q(1, 1000), st->time_base); |
| 787 | |
| 788 | sub = ff_subtitles_queue_insert(&vobsub->q[s->nb_streams - 1], "", 0, 0); |
| 789 | if (!sub) { |
| 790 | ret = AVERROR(ENOMEM); |
| 791 | goto end; |
| 792 | } |
| 793 | sub->pos = pos; |
| 794 | sub->pts = timestamp; |
| 795 | sub->stream_index = s->nb_streams - 1; |
| 796 | |
| 797 | } else if (!strncmp(line, "alt:", 4)) { |
| 798 | const char *p = line + 4; |
| 799 | |
| 800 | while (*p == ' ') |
| 801 | p++; |
| 802 | av_log(s, AV_LOG_DEBUG, "IDX stream[%d] name=%s\n", stream_id, p); |
| 803 | av_strlcpy(alt, p, sizeof(alt)); |
| 804 | header_parsed = 1; |
| 805 | |
| 806 | } else if (!strncmp(line, "delay:", 6)) { |
| 807 | int sign = 1, hh = 0, mm = 0, ss = 0, ms = 0; |
| 808 | const char *p = line + 6; |
| 809 | |
| 810 | while (*p == ' ') |
| 811 | p++; |
| 812 | if (*p == '-' || *p == '+') { |
| 813 | sign = *p == '-' ? -1 : 1; |
| 814 | p++; |
| 815 | } |
| 816 | sscanf(p, "%d:%d:%d:%d", &hh, &mm, &ss, &ms); |
| 817 | delay = ((hh*3600LL + mm*60LL + ss) * 1000LL + ms) * sign; |
| 818 | |
| 819 | } else if (!strncmp(line, "langidx:", 8)) { |
| 820 | const char *p = line + 8; |
| 821 | |
| 822 | if (sscanf(p, "%d", &langidx) != 1) |
| 823 | av_log(s, AV_LOG_ERROR, "Invalid langidx specified\n"); |
| 824 | |
| 825 | } else if (!header_parsed) { |
| 826 | if (line[0] && line[0] != '#') |
| 827 | av_bprintf(&header, "%s\n", line); |
| 828 | } |
| 829 | } |
| 830 | |
| 831 | if (langidx < s->nb_streams) |
| 832 | s->streams[langidx]->disposition |= AV_DISPOSITION_DEFAULT; |
| 833 | |
| 834 | for (i = 0; i < s->nb_streams; i++) { |
| 835 | vobsub->q[i].sort = SUB_SORT_POS_TS; |
| 836 | ff_subtitles_queue_finalize(&vobsub->q[i]); |
| 837 | } |
| 838 | |
| 839 | if (!av_bprint_is_complete(&header)) { |
| 840 | av_bprint_finalize(&header, NULL); |
| 841 | ret = AVERROR(ENOMEM); |
| 842 | goto end; |
| 843 | } |
| 844 | av_bprint_finalize(&header, &header_str); |
| 845 | for (i = 0; i < s->nb_streams; i++) { |
| 846 | AVStream *sub_st = s->streams[i]; |
| 847 | sub_st->codec->extradata = av_strdup(header_str); |
| 848 | sub_st->codec->extradata_size = header.len; |
| 849 | } |
| 850 | av_free(header_str); |
| 851 | |
| 852 | end: |
| 853 | av_free(sub_name); |
| 854 | return ret; |
| 855 | } |
| 856 | |
| 857 | static int vobsub_read_packet(AVFormatContext *s, AVPacket *pkt) |
| 858 | { |
| 859 | MpegDemuxContext *vobsub = s->priv_data; |
| 860 | FFDemuxSubtitlesQueue *q; |
| 861 | AVIOContext *pb = vobsub->sub_ctx->pb; |
| 862 | int ret, psize, total_read = 0, i; |
| 863 | AVPacket idx_pkt; |
| 864 | |
| 865 | int64_t min_ts = INT64_MAX; |
| 866 | int sid = 0; |
| 867 | for (i = 0; i < s->nb_streams; i++) { |
| 868 | FFDemuxSubtitlesQueue *tmpq = &vobsub->q[i]; |
| 869 | int64_t ts; |
| 870 | av_assert0(tmpq->nb_subs); |
| 871 | ts = tmpq->subs[tmpq->current_sub_idx].pts; |
| 872 | if (ts < min_ts) { |
| 873 | min_ts = ts; |
| 874 | sid = i; |
| 875 | } |
| 876 | } |
| 877 | q = &vobsub->q[sid]; |
| 878 | ret = ff_subtitles_queue_read_packet(q, &idx_pkt); |
| 879 | if (ret < 0) |
| 880 | return ret; |
| 881 | |
| 882 | /* compute maximum packet size using the next packet position. This is |
| 883 | * useful when the len in the header is non-sense */ |
| 884 | if (q->current_sub_idx < q->nb_subs) { |
| 885 | psize = q->subs[q->current_sub_idx].pos - idx_pkt.pos; |
| 886 | } else { |
| 887 | int64_t fsize = avio_size(pb); |
| 888 | psize = fsize < 0 ? 0xffff : fsize - idx_pkt.pos; |
| 889 | } |
| 890 | |
| 891 | avio_seek(pb, idx_pkt.pos, SEEK_SET); |
| 892 | |
| 893 | av_init_packet(pkt); |
| 894 | pkt->size = 0; |
| 895 | pkt->data = NULL; |
| 896 | |
| 897 | do { |
| 898 | int n, to_read, startcode; |
| 899 | int64_t pts, dts; |
| 900 | int64_t old_pos = avio_tell(pb), new_pos; |
| 901 | int pkt_size; |
| 902 | |
| 903 | ret = mpegps_read_pes_header(vobsub->sub_ctx, NULL, &startcode, &pts, &dts); |
| 904 | if (ret < 0) { |
| 905 | if (pkt->size) // raise packet even if incomplete |
| 906 | break; |
| 907 | goto fail; |
| 908 | } |
| 909 | to_read = ret & 0xffff; |
| 910 | new_pos = avio_tell(pb); |
| 911 | pkt_size = ret + (new_pos - old_pos); |
| 912 | |
| 913 | /* this prevents reads above the current packet */ |
| 914 | if (total_read + pkt_size > psize) |
| 915 | break; |
| 916 | total_read += pkt_size; |
| 917 | |
| 918 | /* the current chunk doesn't match the stream index (unlikely) */ |
| 919 | if ((startcode & 0x1f) != idx_pkt.stream_index) |
| 920 | break; |
| 921 | |
| 922 | ret = av_grow_packet(pkt, to_read); |
| 923 | if (ret < 0) |
| 924 | goto fail; |
| 925 | |
| 926 | n = avio_read(pb, pkt->data + (pkt->size - to_read), to_read); |
| 927 | if (n < to_read) |
| 928 | pkt->size -= to_read - n; |
| 929 | } while (total_read < psize); |
| 930 | |
| 931 | pkt->pts = pkt->dts = idx_pkt.pts; |
| 932 | pkt->pos = idx_pkt.pos; |
| 933 | pkt->stream_index = idx_pkt.stream_index; |
| 934 | |
| 935 | av_free_packet(&idx_pkt); |
| 936 | return 0; |
| 937 | |
| 938 | fail: |
| 939 | av_free_packet(pkt); |
| 940 | av_free_packet(&idx_pkt); |
| 941 | return ret; |
| 942 | } |
| 943 | |
| 944 | static int vobsub_read_seek(AVFormatContext *s, int stream_index, |
| 945 | int64_t min_ts, int64_t ts, int64_t max_ts, int flags) |
| 946 | { |
| 947 | MpegDemuxContext *vobsub = s->priv_data; |
| 948 | |
| 949 | /* Rescale requested timestamps based on the first stream (timebase is the |
| 950 | * same for all subtitles stream within a .idx/.sub). Rescaling is done just |
| 951 | * like in avformat_seek_file(). */ |
| 952 | if (stream_index == -1 && s->nb_streams != 1) { |
| 953 | int i, ret = 0; |
| 954 | AVRational time_base = s->streams[0]->time_base; |
| 955 | ts = av_rescale_q(ts, AV_TIME_BASE_Q, time_base); |
| 956 | min_ts = av_rescale_rnd(min_ts, time_base.den, |
| 957 | time_base.num * (int64_t)AV_TIME_BASE, |
| 958 | AV_ROUND_UP | AV_ROUND_PASS_MINMAX); |
| 959 | max_ts = av_rescale_rnd(max_ts, time_base.den, |
| 960 | time_base.num * (int64_t)AV_TIME_BASE, |
| 961 | AV_ROUND_DOWN | AV_ROUND_PASS_MINMAX); |
| 962 | for (i = 0; i < s->nb_streams; i++) { |
| 963 | int r = ff_subtitles_queue_seek(&vobsub->q[i], s, stream_index, |
| 964 | min_ts, ts, max_ts, flags); |
| 965 | if (r < 0) |
| 966 | ret = r; |
| 967 | } |
| 968 | return ret; |
| 969 | } |
| 970 | |
| 971 | if (stream_index == -1) // only 1 stream |
| 972 | stream_index = 0; |
| 973 | return ff_subtitles_queue_seek(&vobsub->q[stream_index], s, stream_index, |
| 974 | min_ts, ts, max_ts, flags); |
| 975 | } |
| 976 | |
| 977 | static int vobsub_read_close(AVFormatContext *s) |
| 978 | { |
| 979 | int i; |
| 980 | MpegDemuxContext *vobsub = s->priv_data; |
| 981 | |
| 982 | for (i = 0; i < s->nb_streams; i++) |
| 983 | ff_subtitles_queue_clean(&vobsub->q[i]); |
| 984 | if (vobsub->sub_ctx) |
| 985 | avformat_close_input(&vobsub->sub_ctx); |
| 986 | return 0; |
| 987 | } |
| 988 | |
| 989 | AVInputFormat ff_vobsub_demuxer = { |
| 990 | .name = "vobsub", |
| 991 | .long_name = NULL_IF_CONFIG_SMALL("VobSub subtitle format"), |
| 992 | .priv_data_size = sizeof(MpegDemuxContext), |
| 993 | .read_probe = vobsub_probe, |
| 994 | .read_header = vobsub_read_header, |
| 995 | .read_packet = vobsub_read_packet, |
| 996 | .read_seek2 = vobsub_read_seek, |
| 997 | .read_close = vobsub_read_close, |
| 998 | .flags = AVFMT_SHOW_IDS, |
| 999 | .extensions = "idx", |
| 1000 | }; |
| 1001 | #endif |