| 1 | /* |
| 2 | * Copyright (c) 2011, Luca Barbato |
| 3 | * |
| 4 | * This file is part of FFmpeg. |
| 5 | * |
| 6 | * FFmpeg is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2.1 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * FFmpeg is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
| 17 | * License along with FFmpeg; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 19 | */ |
| 20 | |
| 21 | /** |
| 22 | * @file generic segmenter |
| 23 | * M3U8 specification can be find here: |
| 24 | * @url{http://tools.ietf.org/id/draft-pantos-http-live-streaming} |
| 25 | */ |
| 26 | |
| 27 | /* #define DEBUG */ |
| 28 | |
| 29 | #include <float.h> |
| 30 | #include <time.h> |
| 31 | |
| 32 | #include "avformat.h" |
| 33 | #include "internal.h" |
| 34 | |
| 35 | #include "libavutil/avassert.h" |
| 36 | #include "libavutil/log.h" |
| 37 | #include "libavutil/opt.h" |
| 38 | #include "libavutil/avstring.h" |
| 39 | #include "libavutil/parseutils.h" |
| 40 | #include "libavutil/mathematics.h" |
| 41 | #include "libavutil/time.h" |
| 42 | #include "libavutil/timestamp.h" |
| 43 | |
| 44 | typedef struct SegmentListEntry { |
| 45 | int index; |
| 46 | double start_time, end_time; |
| 47 | int64_t start_pts; |
| 48 | int64_t offset_pts; |
| 49 | char *filename; |
| 50 | struct SegmentListEntry *next; |
| 51 | int64_t last_duration; |
| 52 | } SegmentListEntry; |
| 53 | |
| 54 | typedef enum { |
| 55 | LIST_TYPE_UNDEFINED = -1, |
| 56 | LIST_TYPE_FLAT = 0, |
| 57 | LIST_TYPE_CSV, |
| 58 | LIST_TYPE_M3U8, |
| 59 | LIST_TYPE_EXT, ///< deprecated |
| 60 | LIST_TYPE_FFCONCAT, |
| 61 | LIST_TYPE_NB, |
| 62 | } ListType; |
| 63 | |
| 64 | #define SEGMENT_LIST_FLAG_CACHE 1 |
| 65 | #define SEGMENT_LIST_FLAG_LIVE 2 |
| 66 | |
| 67 | typedef struct { |
| 68 | const AVClass *class; /**< Class for private options. */ |
| 69 | int segment_idx; ///< index of the segment file to write, starting from 0 |
| 70 | int segment_idx_wrap; ///< number after which the index wraps |
| 71 | int segment_idx_wrap_nb; ///< number of time the index has wraped |
| 72 | int segment_count; ///< number of segment files already written |
| 73 | AVOutputFormat *oformat; |
| 74 | AVFormatContext *avf; |
| 75 | char *format; ///< format to use for output segment files |
| 76 | char *format_options_str; ///< format options to use for output segment files |
| 77 | AVDictionary *format_options; |
| 78 | char *list; ///< filename for the segment list file |
| 79 | int list_flags; ///< flags affecting list generation |
| 80 | int list_size; ///< number of entries for the segment list file |
| 81 | |
| 82 | int use_clocktime; ///< flag to cut segments at regular clock time |
| 83 | int64_t last_val; ///< remember last time for wrap around detection |
| 84 | int64_t last_cut; ///< remember last cut |
| 85 | int cut_pending; |
| 86 | |
| 87 | char *entry_prefix; ///< prefix to add to list entry filenames |
| 88 | ListType list_type; ///< set the list type |
| 89 | AVIOContext *list_pb; ///< list file put-byte context |
| 90 | char *time_str; ///< segment duration specification string |
| 91 | int64_t time; ///< segment duration |
| 92 | |
| 93 | char *times_str; ///< segment times specification string |
| 94 | int64_t *times; ///< list of segment interval specification |
| 95 | int nb_times; ///< number of elments in the times array |
| 96 | |
| 97 | char *frames_str; ///< segment frame numbers specification string |
| 98 | int *frames; ///< list of frame number specification |
| 99 | int nb_frames; ///< number of elments in the frames array |
| 100 | int frame_count; ///< total number of reference frames |
| 101 | int segment_frame_count; ///< number of reference frames in the segment |
| 102 | |
| 103 | int64_t time_delta; |
| 104 | int individual_header_trailer; /**< Set by a private option. */ |
| 105 | int write_header_trailer; /**< Set by a private option. */ |
| 106 | |
| 107 | int reset_timestamps; ///< reset timestamps at the begin of each segment |
| 108 | int64_t initial_offset; ///< initial timestamps offset, expressed in microseconds |
| 109 | char *reference_stream_specifier; ///< reference stream specifier |
| 110 | int reference_stream_index; |
| 111 | |
| 112 | SegmentListEntry cur_entry; |
| 113 | SegmentListEntry *segment_list_entries; |
| 114 | SegmentListEntry *segment_list_entries_end; |
| 115 | } SegmentContext; |
| 116 | |
| 117 | static void print_csv_escaped_str(AVIOContext *ctx, const char *str) |
| 118 | { |
| 119 | int needs_quoting = !!str[strcspn(str, "\",\n\r")]; |
| 120 | |
| 121 | if (needs_quoting) |
| 122 | avio_w8(ctx, '"'); |
| 123 | |
| 124 | for (; *str; str++) { |
| 125 | if (*str == '"') |
| 126 | avio_w8(ctx, '"'); |
| 127 | avio_w8(ctx, *str); |
| 128 | } |
| 129 | if (needs_quoting) |
| 130 | avio_w8(ctx, '"'); |
| 131 | } |
| 132 | |
| 133 | static int segment_mux_init(AVFormatContext *s) |
| 134 | { |
| 135 | SegmentContext *seg = s->priv_data; |
| 136 | AVFormatContext *oc; |
| 137 | int i; |
| 138 | int ret; |
| 139 | |
| 140 | ret = avformat_alloc_output_context2(&seg->avf, seg->oformat, NULL, NULL); |
| 141 | if (ret < 0) |
| 142 | return ret; |
| 143 | oc = seg->avf; |
| 144 | |
| 145 | oc->interrupt_callback = s->interrupt_callback; |
| 146 | av_dict_copy(&oc->metadata, s->metadata, 0); |
| 147 | |
| 148 | for (i = 0; i < s->nb_streams; i++) { |
| 149 | AVStream *st; |
| 150 | AVCodecContext *icodec, *ocodec; |
| 151 | |
| 152 | if (!(st = avformat_new_stream(oc, NULL))) |
| 153 | return AVERROR(ENOMEM); |
| 154 | icodec = s->streams[i]->codec; |
| 155 | ocodec = st->codec; |
| 156 | avcodec_copy_context(ocodec, icodec); |
| 157 | if (!oc->oformat->codec_tag || |
| 158 | av_codec_get_id (oc->oformat->codec_tag, icodec->codec_tag) == ocodec->codec_id || |
| 159 | av_codec_get_tag(oc->oformat->codec_tag, icodec->codec_id) <= 0) { |
| 160 | ocodec->codec_tag = icodec->codec_tag; |
| 161 | } else { |
| 162 | ocodec->codec_tag = 0; |
| 163 | } |
| 164 | st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio; |
| 165 | av_dict_copy(&st->metadata, s->streams[i]->metadata, 0); |
| 166 | } |
| 167 | |
| 168 | return 0; |
| 169 | } |
| 170 | |
| 171 | static int set_segment_filename(AVFormatContext *s) |
| 172 | { |
| 173 | SegmentContext *seg = s->priv_data; |
| 174 | AVFormatContext *oc = seg->avf; |
| 175 | size_t size; |
| 176 | |
| 177 | if (seg->segment_idx_wrap) |
| 178 | seg->segment_idx %= seg->segment_idx_wrap; |
| 179 | if (av_get_frame_filename(oc->filename, sizeof(oc->filename), |
| 180 | s->filename, seg->segment_idx) < 0) { |
| 181 | av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s'\n", s->filename); |
| 182 | return AVERROR(EINVAL); |
| 183 | } |
| 184 | |
| 185 | /* copy modified name in list entry */ |
| 186 | size = strlen(av_basename(oc->filename)) + 1; |
| 187 | if (seg->entry_prefix) |
| 188 | size += strlen(seg->entry_prefix); |
| 189 | |
| 190 | seg->cur_entry.filename = av_mallocz(size); |
| 191 | if (!seg->cur_entry.filename) |
| 192 | return AVERROR(ENOMEM); |
| 193 | snprintf(seg->cur_entry.filename, size, "%s%s", |
| 194 | seg->entry_prefix ? seg->entry_prefix : "", |
| 195 | av_basename(oc->filename)); |
| 196 | |
| 197 | return 0; |
| 198 | } |
| 199 | |
| 200 | static int segment_start(AVFormatContext *s, int write_header) |
| 201 | { |
| 202 | SegmentContext *seg = s->priv_data; |
| 203 | AVFormatContext *oc = seg->avf; |
| 204 | int err = 0; |
| 205 | |
| 206 | if (write_header) { |
| 207 | avformat_free_context(oc); |
| 208 | seg->avf = NULL; |
| 209 | if ((err = segment_mux_init(s)) < 0) |
| 210 | return err; |
| 211 | oc = seg->avf; |
| 212 | } |
| 213 | |
| 214 | seg->segment_idx++; |
| 215 | if ((seg->segment_idx_wrap) && (seg->segment_idx%seg->segment_idx_wrap == 0)) |
| 216 | seg->segment_idx_wrap_nb++; |
| 217 | |
| 218 | if ((err = set_segment_filename(s)) < 0) |
| 219 | return err; |
| 220 | |
| 221 | if ((err = avio_open2(&oc->pb, oc->filename, AVIO_FLAG_WRITE, |
| 222 | &s->interrupt_callback, NULL)) < 0) { |
| 223 | av_log(s, AV_LOG_ERROR, "Failed to open segment '%s'\n", oc->filename); |
| 224 | return err; |
| 225 | } |
| 226 | |
| 227 | if (oc->oformat->priv_class && oc->priv_data) |
| 228 | av_opt_set(oc->priv_data, "mpegts_flags", "+resend_headers", 0); |
| 229 | |
| 230 | if (write_header) { |
| 231 | if ((err = avformat_write_header(oc, NULL)) < 0) |
| 232 | return err; |
| 233 | } |
| 234 | |
| 235 | seg->segment_frame_count = 0; |
| 236 | return 0; |
| 237 | } |
| 238 | |
| 239 | static int segment_list_open(AVFormatContext *s) |
| 240 | { |
| 241 | SegmentContext *seg = s->priv_data; |
| 242 | int ret; |
| 243 | |
| 244 | ret = avio_open2(&seg->list_pb, seg->list, AVIO_FLAG_WRITE, |
| 245 | &s->interrupt_callback, NULL); |
| 246 | if (ret < 0) { |
| 247 | av_log(s, AV_LOG_ERROR, "Failed to open segment list '%s'\n", seg->list); |
| 248 | return ret; |
| 249 | } |
| 250 | |
| 251 | if (seg->list_type == LIST_TYPE_M3U8 && seg->segment_list_entries) { |
| 252 | SegmentListEntry *entry; |
| 253 | double max_duration = 0; |
| 254 | |
| 255 | avio_printf(seg->list_pb, "#EXTM3U\n"); |
| 256 | avio_printf(seg->list_pb, "#EXT-X-VERSION:3\n"); |
| 257 | avio_printf(seg->list_pb, "#EXT-X-MEDIA-SEQUENCE:%d\n", seg->segment_list_entries->index); |
| 258 | avio_printf(seg->list_pb, "#EXT-X-ALLOW-CACHE:%s\n", |
| 259 | seg->list_flags & SEGMENT_LIST_FLAG_CACHE ? "YES" : "NO"); |
| 260 | |
| 261 | av_log(s, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%d\n", |
| 262 | seg->segment_list_entries->index); |
| 263 | |
| 264 | for (entry = seg->segment_list_entries; entry; entry = entry->next) |
| 265 | max_duration = FFMAX(max_duration, entry->end_time - entry->start_time); |
| 266 | avio_printf(seg->list_pb, "#EXT-X-TARGETDURATION:%"PRId64"\n", (int64_t)ceil(max_duration)); |
| 267 | } else if (seg->list_type == LIST_TYPE_FFCONCAT) { |
| 268 | avio_printf(seg->list_pb, "ffconcat version 1.0\n"); |
| 269 | } |
| 270 | |
| 271 | return ret; |
| 272 | } |
| 273 | |
| 274 | static void segment_list_print_entry(AVIOContext *list_ioctx, |
| 275 | ListType list_type, |
| 276 | const SegmentListEntry *list_entry, |
| 277 | void *log_ctx) |
| 278 | { |
| 279 | switch (list_type) { |
| 280 | case LIST_TYPE_FLAT: |
| 281 | avio_printf(list_ioctx, "%s\n", list_entry->filename); |
| 282 | break; |
| 283 | case LIST_TYPE_CSV: |
| 284 | case LIST_TYPE_EXT: |
| 285 | print_csv_escaped_str(list_ioctx, list_entry->filename); |
| 286 | avio_printf(list_ioctx, ",%f,%f\n", list_entry->start_time, list_entry->end_time); |
| 287 | break; |
| 288 | case LIST_TYPE_M3U8: |
| 289 | avio_printf(list_ioctx, "#EXTINF:%f,\n%s\n", |
| 290 | list_entry->end_time - list_entry->start_time, list_entry->filename); |
| 291 | break; |
| 292 | case LIST_TYPE_FFCONCAT: |
| 293 | { |
| 294 | char *buf; |
| 295 | if (av_escape(&buf, list_entry->filename, NULL, AV_ESCAPE_MODE_AUTO, AV_ESCAPE_FLAG_WHITESPACE) < 0) { |
| 296 | av_log(log_ctx, AV_LOG_WARNING, |
| 297 | "Error writing list entry '%s' in list file\n", list_entry->filename); |
| 298 | return; |
| 299 | } |
| 300 | avio_printf(list_ioctx, "file %s\n", buf); |
| 301 | av_free(buf); |
| 302 | break; |
| 303 | } |
| 304 | default: |
| 305 | av_assert0(!"Invalid list type"); |
| 306 | } |
| 307 | } |
| 308 | |
| 309 | static int segment_end(AVFormatContext *s, int write_trailer, int is_last) |
| 310 | { |
| 311 | SegmentContext *seg = s->priv_data; |
| 312 | AVFormatContext *oc = seg->avf; |
| 313 | int ret = 0; |
| 314 | |
| 315 | av_write_frame(oc, NULL); /* Flush any buffered data (fragmented mp4) */ |
| 316 | if (write_trailer) |
| 317 | ret = av_write_trailer(oc); |
| 318 | |
| 319 | if (ret < 0) |
| 320 | av_log(s, AV_LOG_ERROR, "Failure occurred when ending segment '%s'\n", |
| 321 | oc->filename); |
| 322 | |
| 323 | if (seg->list) { |
| 324 | if (seg->list_size || seg->list_type == LIST_TYPE_M3U8) { |
| 325 | SegmentListEntry *entry = av_mallocz(sizeof(*entry)); |
| 326 | if (!entry) { |
| 327 | ret = AVERROR(ENOMEM); |
| 328 | goto end; |
| 329 | } |
| 330 | |
| 331 | /* append new element */ |
| 332 | memcpy(entry, &seg->cur_entry, sizeof(*entry)); |
| 333 | if (!seg->segment_list_entries) |
| 334 | seg->segment_list_entries = seg->segment_list_entries_end = entry; |
| 335 | else |
| 336 | seg->segment_list_entries_end->next = entry; |
| 337 | seg->segment_list_entries_end = entry; |
| 338 | |
| 339 | /* drop first item */ |
| 340 | if (seg->list_size && seg->segment_count >= seg->list_size) { |
| 341 | entry = seg->segment_list_entries; |
| 342 | seg->segment_list_entries = seg->segment_list_entries->next; |
| 343 | av_free(entry->filename); |
| 344 | av_freep(&entry); |
| 345 | } |
| 346 | |
| 347 | avio_close(seg->list_pb); |
| 348 | if ((ret = segment_list_open(s)) < 0) |
| 349 | goto end; |
| 350 | for (entry = seg->segment_list_entries; entry; entry = entry->next) |
| 351 | segment_list_print_entry(seg->list_pb, seg->list_type, entry, s); |
| 352 | if (seg->list_type == LIST_TYPE_M3U8 && is_last) |
| 353 | avio_printf(seg->list_pb, "#EXT-X-ENDLIST\n"); |
| 354 | } else { |
| 355 | segment_list_print_entry(seg->list_pb, seg->list_type, &seg->cur_entry, s); |
| 356 | } |
| 357 | avio_flush(seg->list_pb); |
| 358 | } |
| 359 | |
| 360 | av_log(s, AV_LOG_VERBOSE, "segment:'%s' count:%d ended\n", |
| 361 | seg->avf->filename, seg->segment_count); |
| 362 | seg->segment_count++; |
| 363 | |
| 364 | end: |
| 365 | avio_close(oc->pb); |
| 366 | |
| 367 | return ret; |
| 368 | } |
| 369 | |
| 370 | static int parse_times(void *log_ctx, int64_t **times, int *nb_times, |
| 371 | const char *times_str) |
| 372 | { |
| 373 | char *p; |
| 374 | int i, ret = 0; |
| 375 | char *times_str1 = av_strdup(times_str); |
| 376 | char *saveptr = NULL; |
| 377 | |
| 378 | if (!times_str1) |
| 379 | return AVERROR(ENOMEM); |
| 380 | |
| 381 | #define FAIL(err) ret = err; goto end |
| 382 | |
| 383 | *nb_times = 1; |
| 384 | for (p = times_str1; *p; p++) |
| 385 | if (*p == ',') |
| 386 | (*nb_times)++; |
| 387 | |
| 388 | *times = av_malloc_array(*nb_times, sizeof(**times)); |
| 389 | if (!*times) { |
| 390 | av_log(log_ctx, AV_LOG_ERROR, "Could not allocate forced times array\n"); |
| 391 | FAIL(AVERROR(ENOMEM)); |
| 392 | } |
| 393 | |
| 394 | p = times_str1; |
| 395 | for (i = 0; i < *nb_times; i++) { |
| 396 | int64_t t; |
| 397 | char *tstr = av_strtok(p, ",", &saveptr); |
| 398 | p = NULL; |
| 399 | |
| 400 | if (!tstr || !tstr[0]) { |
| 401 | av_log(log_ctx, AV_LOG_ERROR, "Empty time specification in times list %s\n", |
| 402 | times_str); |
| 403 | FAIL(AVERROR(EINVAL)); |
| 404 | } |
| 405 | |
| 406 | ret = av_parse_time(&t, tstr, 1); |
| 407 | if (ret < 0) { |
| 408 | av_log(log_ctx, AV_LOG_ERROR, |
| 409 | "Invalid time duration specification '%s' in times list %s\n", tstr, times_str); |
| 410 | FAIL(AVERROR(EINVAL)); |
| 411 | } |
| 412 | (*times)[i] = t; |
| 413 | |
| 414 | /* check on monotonicity */ |
| 415 | if (i && (*times)[i-1] > (*times)[i]) { |
| 416 | av_log(log_ctx, AV_LOG_ERROR, |
| 417 | "Specified time %f is greater than the following time %f\n", |
| 418 | (float)((*times)[i])/1000000, (float)((*times)[i-1])/1000000); |
| 419 | FAIL(AVERROR(EINVAL)); |
| 420 | } |
| 421 | } |
| 422 | |
| 423 | end: |
| 424 | av_free(times_str1); |
| 425 | return ret; |
| 426 | } |
| 427 | |
| 428 | static int parse_frames(void *log_ctx, int **frames, int *nb_frames, |
| 429 | const char *frames_str) |
| 430 | { |
| 431 | char *p; |
| 432 | int i, ret = 0; |
| 433 | char *frames_str1 = av_strdup(frames_str); |
| 434 | char *saveptr = NULL; |
| 435 | |
| 436 | if (!frames_str1) |
| 437 | return AVERROR(ENOMEM); |
| 438 | |
| 439 | #define FAIL(err) ret = err; goto end |
| 440 | |
| 441 | *nb_frames = 1; |
| 442 | for (p = frames_str1; *p; p++) |
| 443 | if (*p == ',') |
| 444 | (*nb_frames)++; |
| 445 | |
| 446 | *frames = av_malloc_array(*nb_frames, sizeof(**frames)); |
| 447 | if (!*frames) { |
| 448 | av_log(log_ctx, AV_LOG_ERROR, "Could not allocate forced frames array\n"); |
| 449 | FAIL(AVERROR(ENOMEM)); |
| 450 | } |
| 451 | |
| 452 | p = frames_str1; |
| 453 | for (i = 0; i < *nb_frames; i++) { |
| 454 | long int f; |
| 455 | char *tailptr; |
| 456 | char *fstr = av_strtok(p, ",", &saveptr); |
| 457 | |
| 458 | p = NULL; |
| 459 | if (!fstr) { |
| 460 | av_log(log_ctx, AV_LOG_ERROR, "Empty frame specification in frame list %s\n", |
| 461 | frames_str); |
| 462 | FAIL(AVERROR(EINVAL)); |
| 463 | } |
| 464 | f = strtol(fstr, &tailptr, 10); |
| 465 | if (*tailptr || f <= 0 || f >= INT_MAX) { |
| 466 | av_log(log_ctx, AV_LOG_ERROR, |
| 467 | "Invalid argument '%s', must be a positive integer <= INT64_MAX\n", |
| 468 | fstr); |
| 469 | FAIL(AVERROR(EINVAL)); |
| 470 | } |
| 471 | (*frames)[i] = f; |
| 472 | |
| 473 | /* check on monotonicity */ |
| 474 | if (i && (*frames)[i-1] > (*frames)[i]) { |
| 475 | av_log(log_ctx, AV_LOG_ERROR, |
| 476 | "Specified frame %d is greater than the following frame %d\n", |
| 477 | (*frames)[i], (*frames)[i-1]); |
| 478 | FAIL(AVERROR(EINVAL)); |
| 479 | } |
| 480 | } |
| 481 | |
| 482 | end: |
| 483 | av_free(frames_str1); |
| 484 | return ret; |
| 485 | } |
| 486 | |
| 487 | static int open_null_ctx(AVIOContext **ctx) |
| 488 | { |
| 489 | int buf_size = 32768; |
| 490 | uint8_t *buf = av_malloc(buf_size); |
| 491 | if (!buf) |
| 492 | return AVERROR(ENOMEM); |
| 493 | *ctx = avio_alloc_context(buf, buf_size, AVIO_FLAG_WRITE, NULL, NULL, NULL, NULL); |
| 494 | if (!*ctx) { |
| 495 | av_free(buf); |
| 496 | return AVERROR(ENOMEM); |
| 497 | } |
| 498 | return 0; |
| 499 | } |
| 500 | |
| 501 | static void close_null_ctx(AVIOContext *pb) |
| 502 | { |
| 503 | av_free(pb->buffer); |
| 504 | av_free(pb); |
| 505 | } |
| 506 | |
| 507 | static int select_reference_stream(AVFormatContext *s) |
| 508 | { |
| 509 | SegmentContext *seg = s->priv_data; |
| 510 | int ret, i; |
| 511 | |
| 512 | seg->reference_stream_index = -1; |
| 513 | if (!strcmp(seg->reference_stream_specifier, "auto")) { |
| 514 | /* select first index of type with highest priority */ |
| 515 | int type_index_map[AVMEDIA_TYPE_NB]; |
| 516 | static const enum AVMediaType type_priority_list[] = { |
| 517 | AVMEDIA_TYPE_VIDEO, |
| 518 | AVMEDIA_TYPE_AUDIO, |
| 519 | AVMEDIA_TYPE_SUBTITLE, |
| 520 | AVMEDIA_TYPE_DATA, |
| 521 | AVMEDIA_TYPE_ATTACHMENT |
| 522 | }; |
| 523 | enum AVMediaType type; |
| 524 | |
| 525 | for (i = 0; i < AVMEDIA_TYPE_NB; i++) |
| 526 | type_index_map[i] = -1; |
| 527 | |
| 528 | /* select first index for each type */ |
| 529 | for (i = 0; i < s->nb_streams; i++) { |
| 530 | type = s->streams[i]->codec->codec_type; |
| 531 | if ((unsigned)type < AVMEDIA_TYPE_NB && type_index_map[type] == -1 |
| 532 | /* ignore attached pictures/cover art streams */ |
| 533 | && !(s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC)) |
| 534 | type_index_map[type] = i; |
| 535 | } |
| 536 | |
| 537 | for (i = 0; i < FF_ARRAY_ELEMS(type_priority_list); i++) { |
| 538 | type = type_priority_list[i]; |
| 539 | if ((seg->reference_stream_index = type_index_map[type]) >= 0) |
| 540 | break; |
| 541 | } |
| 542 | } else { |
| 543 | for (i = 0; i < s->nb_streams; i++) { |
| 544 | ret = avformat_match_stream_specifier(s, s->streams[i], |
| 545 | seg->reference_stream_specifier); |
| 546 | if (ret < 0) |
| 547 | return ret; |
| 548 | if (ret > 0) { |
| 549 | seg->reference_stream_index = i; |
| 550 | break; |
| 551 | } |
| 552 | } |
| 553 | } |
| 554 | |
| 555 | if (seg->reference_stream_index < 0) { |
| 556 | av_log(s, AV_LOG_ERROR, "Could not select stream matching identifier '%s'\n", |
| 557 | seg->reference_stream_specifier); |
| 558 | return AVERROR(EINVAL); |
| 559 | } |
| 560 | |
| 561 | return 0; |
| 562 | } |
| 563 | |
| 564 | static int seg_write_header(AVFormatContext *s) |
| 565 | { |
| 566 | SegmentContext *seg = s->priv_data; |
| 567 | AVFormatContext *oc = NULL; |
| 568 | AVDictionary *options = NULL; |
| 569 | int ret; |
| 570 | |
| 571 | seg->segment_count = 0; |
| 572 | if (!seg->write_header_trailer) |
| 573 | seg->individual_header_trailer = 0; |
| 574 | |
| 575 | if (!!seg->time_str + !!seg->times_str + !!seg->frames_str > 1) { |
| 576 | av_log(s, AV_LOG_ERROR, |
| 577 | "segment_time, segment_times, and segment_frames options " |
| 578 | "are mutually exclusive, select just one of them\n"); |
| 579 | return AVERROR(EINVAL); |
| 580 | } |
| 581 | |
| 582 | if (seg->times_str) { |
| 583 | if ((ret = parse_times(s, &seg->times, &seg->nb_times, seg->times_str)) < 0) |
| 584 | return ret; |
| 585 | } else if (seg->frames_str) { |
| 586 | if ((ret = parse_frames(s, &seg->frames, &seg->nb_frames, seg->frames_str)) < 0) |
| 587 | return ret; |
| 588 | } else { |
| 589 | /* set default value if not specified */ |
| 590 | if (!seg->time_str) |
| 591 | seg->time_str = av_strdup("2"); |
| 592 | if ((ret = av_parse_time(&seg->time, seg->time_str, 1)) < 0) { |
| 593 | av_log(s, AV_LOG_ERROR, |
| 594 | "Invalid time duration specification '%s' for segment_time option\n", |
| 595 | seg->time_str); |
| 596 | return ret; |
| 597 | } |
| 598 | } |
| 599 | |
| 600 | if (seg->format_options_str) { |
| 601 | ret = av_dict_parse_string(&seg->format_options, seg->format_options_str, "=", ":", 0); |
| 602 | if (ret < 0) { |
| 603 | av_log(s, AV_LOG_ERROR, "Could not parse format options list '%s'\n", |
| 604 | seg->format_options_str); |
| 605 | goto fail; |
| 606 | } |
| 607 | } |
| 608 | |
| 609 | if (seg->list) { |
| 610 | if (seg->list_type == LIST_TYPE_UNDEFINED) { |
| 611 | if (av_match_ext(seg->list, "csv" )) seg->list_type = LIST_TYPE_CSV; |
| 612 | else if (av_match_ext(seg->list, "ext" )) seg->list_type = LIST_TYPE_EXT; |
| 613 | else if (av_match_ext(seg->list, "m3u8")) seg->list_type = LIST_TYPE_M3U8; |
| 614 | else if (av_match_ext(seg->list, "ffcat,ffconcat")) seg->list_type = LIST_TYPE_FFCONCAT; |
| 615 | else seg->list_type = LIST_TYPE_FLAT; |
| 616 | } |
| 617 | if ((ret = segment_list_open(s)) < 0) |
| 618 | goto fail; |
| 619 | } |
| 620 | if (seg->list_type == LIST_TYPE_EXT) |
| 621 | av_log(s, AV_LOG_WARNING, "'ext' list type option is deprecated in favor of 'csv'\n"); |
| 622 | |
| 623 | if ((ret = select_reference_stream(s)) < 0) |
| 624 | goto fail; |
| 625 | av_log(s, AV_LOG_VERBOSE, "Selected stream id:%d type:%s\n", |
| 626 | seg->reference_stream_index, |
| 627 | av_get_media_type_string(s->streams[seg->reference_stream_index]->codec->codec_type)); |
| 628 | |
| 629 | seg->oformat = av_guess_format(seg->format, s->filename, NULL); |
| 630 | |
| 631 | if (!seg->oformat) { |
| 632 | ret = AVERROR_MUXER_NOT_FOUND; |
| 633 | goto fail; |
| 634 | } |
| 635 | if (seg->oformat->flags & AVFMT_NOFILE) { |
| 636 | av_log(s, AV_LOG_ERROR, "format %s not supported.\n", |
| 637 | seg->oformat->name); |
| 638 | ret = AVERROR(EINVAL); |
| 639 | goto fail; |
| 640 | } |
| 641 | |
| 642 | if ((ret = segment_mux_init(s)) < 0) |
| 643 | goto fail; |
| 644 | oc = seg->avf; |
| 645 | |
| 646 | if ((ret = set_segment_filename(s)) < 0) |
| 647 | goto fail; |
| 648 | |
| 649 | if (seg->write_header_trailer) { |
| 650 | if ((ret = avio_open2(&oc->pb, oc->filename, AVIO_FLAG_WRITE, |
| 651 | &s->interrupt_callback, NULL)) < 0) { |
| 652 | av_log(s, AV_LOG_ERROR, "Failed to open segment '%s'\n", oc->filename); |
| 653 | goto fail; |
| 654 | } |
| 655 | } else { |
| 656 | if ((ret = open_null_ctx(&oc->pb)) < 0) |
| 657 | goto fail; |
| 658 | } |
| 659 | |
| 660 | av_dict_copy(&options, seg->format_options, 0); |
| 661 | ret = avformat_write_header(oc, &options); |
| 662 | if (av_dict_count(options)) { |
| 663 | av_log(s, AV_LOG_ERROR, |
| 664 | "Some of the provided format options in '%s' are not recognized\n", seg->format_options_str); |
| 665 | ret = AVERROR(EINVAL); |
| 666 | goto fail; |
| 667 | } |
| 668 | |
| 669 | if (ret < 0) { |
| 670 | avio_close(oc->pb); |
| 671 | goto fail; |
| 672 | } |
| 673 | seg->segment_frame_count = 0; |
| 674 | |
| 675 | if (oc->avoid_negative_ts > 0 && s->avoid_negative_ts < 0) |
| 676 | s->avoid_negative_ts = 1; |
| 677 | |
| 678 | if (!seg->write_header_trailer) { |
| 679 | close_null_ctx(oc->pb); |
| 680 | if ((ret = avio_open2(&oc->pb, oc->filename, AVIO_FLAG_WRITE, |
| 681 | &s->interrupt_callback, NULL)) < 0) |
| 682 | goto fail; |
| 683 | } |
| 684 | |
| 685 | fail: |
| 686 | av_dict_free(&options); |
| 687 | if (ret) { |
| 688 | if (seg->list) |
| 689 | avio_close(seg->list_pb); |
| 690 | if (seg->avf) |
| 691 | avformat_free_context(seg->avf); |
| 692 | } |
| 693 | return ret; |
| 694 | } |
| 695 | |
| 696 | static int seg_write_packet(AVFormatContext *s, AVPacket *pkt) |
| 697 | { |
| 698 | SegmentContext *seg = s->priv_data; |
| 699 | AVStream *st = s->streams[pkt->stream_index]; |
| 700 | int64_t end_pts = INT64_MAX, offset; |
| 701 | int start_frame = INT_MAX; |
| 702 | int ret; |
| 703 | struct tm ti; |
| 704 | int64_t usecs; |
| 705 | int64_t wrapped_val; |
| 706 | |
| 707 | if (seg->times) { |
| 708 | end_pts = seg->segment_count < seg->nb_times ? |
| 709 | seg->times[seg->segment_count] : INT64_MAX; |
| 710 | } else if (seg->frames) { |
| 711 | start_frame = seg->segment_count < seg->nb_frames ? |
| 712 | seg->frames[seg->segment_count] : INT_MAX; |
| 713 | } else { |
| 714 | if (seg->use_clocktime) { |
| 715 | int64_t avgt = av_gettime(); |
| 716 | time_t sec = avgt / 1000000; |
| 717 | #if HAVE_LOCALTIME_R |
| 718 | localtime_r(&sec, &ti); |
| 719 | #else |
| 720 | ti = *localtime(&sec); |
| 721 | #endif |
| 722 | usecs = (int64_t)(ti.tm_hour*3600 + ti.tm_min*60 + ti.tm_sec) * 1000000 + (avgt % 1000000); |
| 723 | wrapped_val = usecs % seg->time; |
| 724 | if (seg->last_cut != usecs && wrapped_val < seg->last_val) { |
| 725 | seg->cut_pending = 1; |
| 726 | seg->last_cut = usecs; |
| 727 | } |
| 728 | seg->last_val = wrapped_val; |
| 729 | } else { |
| 730 | end_pts = seg->time * (seg->segment_count+1); |
| 731 | } |
| 732 | } |
| 733 | |
| 734 | av_dlog(s, "packet stream:%d pts:%s pts_time:%s duration_time:%s is_key:%d frame:%d\n", |
| 735 | pkt->stream_index, av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base), |
| 736 | av_ts2timestr(pkt->duration, &st->time_base), |
| 737 | pkt->flags & AV_PKT_FLAG_KEY, |
| 738 | pkt->stream_index == seg->reference_stream_index ? seg->frame_count : -1); |
| 739 | |
| 740 | if (pkt->stream_index == seg->reference_stream_index && |
| 741 | pkt->flags & AV_PKT_FLAG_KEY && |
| 742 | seg->segment_frame_count > 0 && |
| 743 | (seg->cut_pending || seg->frame_count >= start_frame || |
| 744 | (pkt->pts != AV_NOPTS_VALUE && |
| 745 | av_compare_ts(pkt->pts, st->time_base, |
| 746 | end_pts-seg->time_delta, AV_TIME_BASE_Q) >= 0))) { |
| 747 | /* sanitize end time in case last packet didn't have a defined duration */ |
| 748 | if (seg->cur_entry.last_duration == 0) |
| 749 | seg->cur_entry.end_time = (double)pkt->pts * av_q2d(st->time_base); |
| 750 | |
| 751 | if ((ret = segment_end(s, seg->individual_header_trailer, 0)) < 0) |
| 752 | goto fail; |
| 753 | |
| 754 | if ((ret = segment_start(s, seg->individual_header_trailer)) < 0) |
| 755 | goto fail; |
| 756 | |
| 757 | seg->cut_pending = 0; |
| 758 | seg->cur_entry.index = seg->segment_idx + seg->segment_idx_wrap*seg->segment_idx_wrap_nb; |
| 759 | seg->cur_entry.start_time = (double)pkt->pts * av_q2d(st->time_base); |
| 760 | seg->cur_entry.start_pts = av_rescale_q(pkt->pts, st->time_base, AV_TIME_BASE_Q); |
| 761 | seg->cur_entry.end_time = seg->cur_entry.start_time + |
| 762 | pkt->pts != AV_NOPTS_VALUE ? (double)(pkt->pts + pkt->duration) * av_q2d(st->time_base) : 0; |
| 763 | } else if (pkt->pts != AV_NOPTS_VALUE && pkt->stream_index == seg->reference_stream_index) { |
| 764 | seg->cur_entry.end_time = |
| 765 | FFMAX(seg->cur_entry.end_time, (double)(pkt->pts + pkt->duration) * av_q2d(st->time_base)); |
| 766 | seg->cur_entry.last_duration = pkt->duration; |
| 767 | } |
| 768 | |
| 769 | if (seg->segment_frame_count == 0) { |
| 770 | av_log(s, AV_LOG_VERBOSE, "segment:'%s' starts with packet stream:%d pts:%s pts_time:%s frame:%d\n", |
| 771 | seg->avf->filename, pkt->stream_index, |
| 772 | av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base), seg->frame_count); |
| 773 | } |
| 774 | |
| 775 | av_log(s, AV_LOG_DEBUG, "stream:%d start_pts_time:%s pts:%s pts_time:%s dts:%s dts_time:%s", |
| 776 | pkt->stream_index, |
| 777 | av_ts2timestr(seg->cur_entry.start_pts, &AV_TIME_BASE_Q), |
| 778 | av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base), |
| 779 | av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &st->time_base)); |
| 780 | |
| 781 | /* compute new timestamps */ |
| 782 | offset = av_rescale_q(seg->initial_offset - (seg->reset_timestamps ? seg->cur_entry.start_pts : 0), |
| 783 | AV_TIME_BASE_Q, st->time_base); |
| 784 | if (pkt->pts != AV_NOPTS_VALUE) |
| 785 | pkt->pts += offset; |
| 786 | if (pkt->dts != AV_NOPTS_VALUE) |
| 787 | pkt->dts += offset; |
| 788 | |
| 789 | av_log(s, AV_LOG_DEBUG, " -> pts:%s pts_time:%s dts:%s dts_time:%s\n", |
| 790 | av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base), |
| 791 | av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &st->time_base)); |
| 792 | |
| 793 | ret = ff_write_chained(seg->avf, pkt->stream_index, pkt, s, seg->initial_offset || seg->reset_timestamps); |
| 794 | |
| 795 | fail: |
| 796 | if (pkt->stream_index == seg->reference_stream_index) { |
| 797 | seg->frame_count++; |
| 798 | seg->segment_frame_count++; |
| 799 | } |
| 800 | |
| 801 | return ret; |
| 802 | } |
| 803 | |
| 804 | static int seg_write_trailer(struct AVFormatContext *s) |
| 805 | { |
| 806 | SegmentContext *seg = s->priv_data; |
| 807 | AVFormatContext *oc = seg->avf; |
| 808 | SegmentListEntry *cur, *next; |
| 809 | |
| 810 | int ret; |
| 811 | if (!seg->write_header_trailer) { |
| 812 | if ((ret = segment_end(s, 0, 1)) < 0) |
| 813 | goto fail; |
| 814 | open_null_ctx(&oc->pb); |
| 815 | ret = av_write_trailer(oc); |
| 816 | close_null_ctx(oc->pb); |
| 817 | } else { |
| 818 | ret = segment_end(s, 1, 1); |
| 819 | } |
| 820 | fail: |
| 821 | if (seg->list) |
| 822 | avio_close(seg->list_pb); |
| 823 | |
| 824 | av_dict_free(&seg->format_options); |
| 825 | av_opt_free(seg); |
| 826 | av_freep(&seg->times); |
| 827 | av_freep(&seg->frames); |
| 828 | |
| 829 | cur = seg->segment_list_entries; |
| 830 | while (cur) { |
| 831 | next = cur->next; |
| 832 | av_free(cur->filename); |
| 833 | av_free(cur); |
| 834 | cur = next; |
| 835 | } |
| 836 | |
| 837 | avformat_free_context(oc); |
| 838 | return ret; |
| 839 | } |
| 840 | |
| 841 | #define OFFSET(x) offsetof(SegmentContext, x) |
| 842 | #define E AV_OPT_FLAG_ENCODING_PARAM |
| 843 | static const AVOption options[] = { |
| 844 | { "reference_stream", "set reference stream", OFFSET(reference_stream_specifier), AV_OPT_TYPE_STRING, {.str = "auto"}, CHAR_MIN, CHAR_MAX, E }, |
| 845 | { "segment_format", "set container format used for the segments", OFFSET(format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E }, |
| 846 | { "segment_format_options", "set list of options for the container format used for the segments", OFFSET(format_options_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E }, |
| 847 | { "segment_list", "set the segment list filename", OFFSET(list), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E }, |
| 848 | |
| 849 | { "segment_list_flags","set flags affecting segment list generation", OFFSET(list_flags), AV_OPT_TYPE_FLAGS, {.i64 = SEGMENT_LIST_FLAG_CACHE }, 0, UINT_MAX, E, "list_flags"}, |
| 850 | { "cache", "allow list caching", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_LIST_FLAG_CACHE }, INT_MIN, INT_MAX, E, "list_flags"}, |
| 851 | { "live", "enable live-friendly list generation (useful for HLS)", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_LIST_FLAG_LIVE }, INT_MIN, INT_MAX, E, "list_flags"}, |
| 852 | |
| 853 | { "segment_list_size", "set the maximum number of playlist entries", OFFSET(list_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E }, |
| 854 | |
| 855 | { "segment_list_type", "set the segment list type", OFFSET(list_type), AV_OPT_TYPE_INT, {.i64 = LIST_TYPE_UNDEFINED}, -1, LIST_TYPE_NB-1, E, "list_type" }, |
| 856 | { "flat", "flat format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_FLAT }, INT_MIN, INT_MAX, E, "list_type" }, |
| 857 | { "csv", "csv format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_CSV }, INT_MIN, INT_MAX, E, "list_type" }, |
| 858 | { "ext", "extended format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_EXT }, INT_MIN, INT_MAX, E, "list_type" }, |
| 859 | { "ffconcat", "ffconcat format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_FFCONCAT }, INT_MIN, INT_MAX, E, "list_type" }, |
| 860 | { "m3u8", "M3U8 format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_M3U8 }, INT_MIN, INT_MAX, E, "list_type" }, |
| 861 | { "hls", "Apple HTTP Live Streaming compatible", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_M3U8 }, INT_MIN, INT_MAX, E, "list_type" }, |
| 862 | |
| 863 | { "segment_atclocktime", "set segment to be cut at clocktime", OFFSET(use_clocktime), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, E}, |
| 864 | { "segment_time", "set segment duration", OFFSET(time_str),AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E }, |
| 865 | { "segment_time_delta","set approximation value used for the segment times", OFFSET(time_delta), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, 0, E }, |
| 866 | { "segment_times", "set segment split time points", OFFSET(times_str),AV_OPT_TYPE_STRING,{.str = NULL}, 0, 0, E }, |
| 867 | { "segment_frames", "set segment split frame numbers", OFFSET(frames_str),AV_OPT_TYPE_STRING,{.str = NULL}, 0, 0, E }, |
| 868 | { "segment_wrap", "set number after which the index wraps", OFFSET(segment_idx_wrap), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E }, |
| 869 | { "segment_list_entry_prefix", "set base url prefix for segments", OFFSET(entry_prefix), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E }, |
| 870 | { "segment_start_number", "set the sequence number of the first segment", OFFSET(segment_idx), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E }, |
| 871 | { "segment_wrap_number", "set the number of wrap before the first segment", OFFSET(segment_idx_wrap_nb), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E }, |
| 872 | |
| 873 | { "individual_header_trailer", "write header/trailer to each segment", OFFSET(individual_header_trailer), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, E }, |
| 874 | { "write_header_trailer", "write a header to the first segment and a trailer to the last one", OFFSET(write_header_trailer), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, E }, |
| 875 | { "reset_timestamps", "reset timestamps at the begin of each segment", OFFSET(reset_timestamps), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, E }, |
| 876 | { "initial_offset", "set initial timestamp offset", OFFSET(initial_offset), AV_OPT_TYPE_DURATION, {.i64 = 0}, -INT64_MAX, INT64_MAX, E }, |
| 877 | { NULL }, |
| 878 | }; |
| 879 | |
| 880 | static const AVClass seg_class = { |
| 881 | .class_name = "segment muxer", |
| 882 | .item_name = av_default_item_name, |
| 883 | .option = options, |
| 884 | .version = LIBAVUTIL_VERSION_INT, |
| 885 | }; |
| 886 | |
| 887 | AVOutputFormat ff_segment_muxer = { |
| 888 | .name = "segment", |
| 889 | .long_name = NULL_IF_CONFIG_SMALL("segment"), |
| 890 | .priv_data_size = sizeof(SegmentContext), |
| 891 | .flags = AVFMT_NOFILE|AVFMT_GLOBALHEADER, |
| 892 | .write_header = seg_write_header, |
| 893 | .write_packet = seg_write_packet, |
| 894 | .write_trailer = seg_write_trailer, |
| 895 | .priv_class = &seg_class, |
| 896 | }; |
| 897 | |
| 898 | static const AVClass sseg_class = { |
| 899 | .class_name = "stream_segment muxer", |
| 900 | .item_name = av_default_item_name, |
| 901 | .option = options, |
| 902 | .version = LIBAVUTIL_VERSION_INT, |
| 903 | }; |
| 904 | |
| 905 | AVOutputFormat ff_stream_segment_muxer = { |
| 906 | .name = "stream_segment,ssegment", |
| 907 | .long_name = NULL_IF_CONFIG_SMALL("streaming segment muxer"), |
| 908 | .priv_data_size = sizeof(SegmentContext), |
| 909 | .flags = AVFMT_NOFILE, |
| 910 | .write_header = seg_write_header, |
| 911 | .write_packet = seg_write_packet, |
| 912 | .write_trailer = seg_write_trailer, |
| 913 | .priv_class = &sseg_class, |
| 914 | }; |