2 * Copyright (c) 2012 Nicolas George
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public License
8 * as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
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
14 * GNU Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public License
17 * along with FFmpeg; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #include "libavutil/avassert.h"
22 #include "libavutil/avstring.h"
23 #include "libavutil/intreadwrite.h"
24 #include "libavutil/opt.h"
25 #include "libavutil/parseutils.h"
26 #include "libavutil/timestamp.h"
31 typedef enum ConcatMatchMode {
36 typedef struct ConcatStream {
37 AVBitStreamFilterContext *bsf;
44 int64_t file_start_time;
47 ConcatStream *streams;
50 AVDictionary *metadata;
63 ConcatMatchMode stream_match_mode;
64 unsigned auto_convert;
67 static int concat_probe(AVProbeData *probe)
69 return memcmp(probe->buf, "ffconcat version 1.0", 20) ?
70 0 : AVPROBE_SCORE_MAX;
73 static char *get_keyword(uint8_t **cursor)
75 char *ret = *cursor += strspn(*cursor, SPACE_CHARS);
76 *cursor += strcspn(*cursor, SPACE_CHARS);
79 *cursor += strspn(*cursor, SPACE_CHARS);
84 static int safe_filename(const char *f)
86 const char *start = f;
90 if (!((unsigned)((*f | 32) - 'a') < 26 ||
91 (unsigned)(*f - '0') < 10 || *f == '_' || *f == '-')) {
103 #define FAIL(retcode) do { ret = (retcode); goto fail; } while(0)
105 static int add_file(AVFormatContext *avf, char *filename, ConcatFile **rfile,
106 unsigned *nb_files_alloc)
108 ConcatContext *cat = avf->priv_data;
112 size_t url_len, proto_len;
115 if (cat->safe > 0 && !safe_filename(filename)) {
116 av_log(avf, AV_LOG_ERROR, "Unsafe file name '%s'\n", filename);
117 FAIL(AVERROR(EPERM));
120 proto = avio_find_protocol_name(filename);
121 proto_len = proto ? strlen(proto) : 0;
122 if (!memcmp(filename, proto, proto_len) &&
123 (filename[proto_len] == ':' || filename[proto_len] == ',')) {
127 url_len = strlen(avf->filename) + strlen(filename) + 16;
128 if (!(url = av_malloc(url_len)))
129 FAIL(AVERROR(ENOMEM));
130 ff_make_absolute_url(url, url_len, avf->filename, filename);
134 if (cat->nb_files >= *nb_files_alloc) {
135 size_t n = FFMAX(*nb_files_alloc * 2, 16);
136 ConcatFile *new_files;
137 if (n <= cat->nb_files || n > SIZE_MAX / sizeof(*cat->files) ||
138 !(new_files = av_realloc(cat->files, n * sizeof(*cat->files))))
139 FAIL(AVERROR(ENOMEM));
140 cat->files = new_files;
144 file = &cat->files[cat->nb_files++];
145 memset(file, 0, sizeof(*file));
149 file->start_time = AV_NOPTS_VALUE;
150 file->duration = AV_NOPTS_VALUE;
151 file->inpoint = AV_NOPTS_VALUE;
152 file->outpoint = AV_NOPTS_VALUE;
162 static int copy_stream_props(AVStream *st, AVStream *source_st)
166 if (st->codec->codec_id || !source_st->codec->codec_id) {
167 if (st->codec->extradata_size < source_st->codec->extradata_size) {
168 ret = ff_alloc_extradata(st->codec,
169 source_st->codec->extradata_size);
173 memcpy(st->codec->extradata, source_st->codec->extradata,
174 source_st->codec->extradata_size);
177 if ((ret = avcodec_copy_context(st->codec, source_st->codec)) < 0)
179 st->r_frame_rate = source_st->r_frame_rate;
180 st->avg_frame_rate = source_st->avg_frame_rate;
181 st->time_base = source_st->time_base;
182 st->sample_aspect_ratio = source_st->sample_aspect_ratio;
184 av_dict_copy(&st->metadata, source_st->metadata, 0);
188 static int detect_stream_specific(AVFormatContext *avf, int idx)
190 ConcatContext *cat = avf->priv_data;
191 AVStream *st = cat->avf->streams[idx];
192 ConcatStream *cs = &cat->cur_file->streams[idx];
193 AVBitStreamFilterContext *bsf;
195 if (cat->auto_convert && st->codec->codec_id == AV_CODEC_ID_H264 &&
196 (st->codec->extradata_size < 4 || AV_RB32(st->codec->extradata) != 1)) {
197 av_log(cat->avf, AV_LOG_INFO,
198 "Auto-inserting h264_mp4toannexb bitstream filter\n");
199 if (!(bsf = av_bitstream_filter_init("h264_mp4toannexb"))) {
200 av_log(avf, AV_LOG_ERROR, "h264_mp4toannexb bitstream filter "
201 "required for H.264 streams\n");
202 return AVERROR_BSF_NOT_FOUND;
209 static int match_streams_one_to_one(AVFormatContext *avf)
211 ConcatContext *cat = avf->priv_data;
215 for (i = cat->cur_file->nb_streams; i < cat->avf->nb_streams; i++) {
216 if (i < avf->nb_streams) {
217 st = avf->streams[i];
219 if (!(st = avformat_new_stream(avf, NULL)))
220 return AVERROR(ENOMEM);
222 if ((ret = copy_stream_props(st, cat->avf->streams[i])) < 0)
224 cat->cur_file->streams[i].out_stream_index = i;
229 static int match_streams_exact_id(AVFormatContext *avf)
231 ConcatContext *cat = avf->priv_data;
235 for (i = cat->cur_file->nb_streams; i < cat->avf->nb_streams; i++) {
236 st = cat->avf->streams[i];
237 for (j = 0; j < avf->nb_streams; j++) {
238 if (avf->streams[j]->id == st->id) {
239 av_log(avf, AV_LOG_VERBOSE,
240 "Match slave stream #%d with stream #%d id 0x%x\n",
242 if ((ret = copy_stream_props(avf->streams[j], st)) < 0)
244 cat->cur_file->streams[i].out_stream_index = j;
251 static int match_streams(AVFormatContext *avf)
253 ConcatContext *cat = avf->priv_data;
257 if (cat->cur_file->nb_streams >= cat->avf->nb_streams)
259 map = av_realloc(cat->cur_file->streams,
260 cat->avf->nb_streams * sizeof(*map));
262 return AVERROR(ENOMEM);
263 cat->cur_file->streams = map;
264 memset(map + cat->cur_file->nb_streams, 0,
265 (cat->avf->nb_streams - cat->cur_file->nb_streams) * sizeof(*map));
267 for (i = cat->cur_file->nb_streams; i < cat->avf->nb_streams; i++)
268 map[i].out_stream_index = -1;
269 switch (cat->stream_match_mode) {
270 case MATCH_ONE_TO_ONE:
271 ret = match_streams_one_to_one(avf);
274 ret = match_streams_exact_id(avf);
281 for (i = cat->cur_file->nb_streams; i < cat->avf->nb_streams; i++)
282 if ((ret = detect_stream_specific(avf, i)) < 0)
284 cat->cur_file->nb_streams = cat->avf->nb_streams;
288 static int open_file(AVFormatContext *avf, unsigned fileno)
290 ConcatContext *cat = avf->priv_data;
291 ConcatFile *file = &cat->files[fileno];
295 avformat_close_input(&cat->avf);
297 cat->avf = avformat_alloc_context();
299 return AVERROR(ENOMEM);
301 cat->avf->interrupt_callback = avf->interrupt_callback;
303 if ((ret = ff_copy_whitelists(cat->avf, avf)) < 0)
306 if ((ret = avformat_open_input(&cat->avf, file->url, NULL, NULL)) < 0 ||
307 (ret = avformat_find_stream_info(cat->avf, NULL)) < 0) {
308 av_log(avf, AV_LOG_ERROR, "Impossible to open '%s'\n", file->url);
309 avformat_close_input(&cat->avf);
312 cat->cur_file = file;
313 if (file->start_time == AV_NOPTS_VALUE)
314 file->start_time = !fileno ? 0 :
315 cat->files[fileno - 1].start_time +
316 cat->files[fileno - 1].duration;
317 file->file_start_time = (avf->start_time == AV_NOPTS_VALUE) ? 0 : avf->start_time;
318 file->file_inpoint = (file->file_inpoint == AV_NOPTS_VALUE) ? file->file_start_time : file->inpoint;
319 if ((ret = match_streams(avf)) < 0)
321 if (file->inpoint != AV_NOPTS_VALUE) {
322 if ((ret = avformat_seek_file(cat->avf, -1, INT64_MIN, file->inpoint, file->inpoint, 0)) < 0)
328 static int concat_read_close(AVFormatContext *avf)
330 ConcatContext *cat = avf->priv_data;
334 avformat_close_input(&cat->avf);
335 for (i = 0; i < cat->nb_files; i++) {
336 av_freep(&cat->files[i].url);
337 av_freep(&cat->files[i].streams);
338 av_dict_free(&cat->files[i].metadata);
340 av_freep(&cat->files);
344 static int concat_read_header(AVFormatContext *avf)
346 ConcatContext *cat = avf->priv_data;
348 uint8_t *cursor, *keyword;
349 int ret, line = 0, i;
350 unsigned nb_files_alloc = 0;
351 ConcatFile *file = NULL;
355 if ((ret = ff_get_line(avf->pb, buf, sizeof(buf))) <= 0)
359 keyword = get_keyword(&cursor);
360 if (!*keyword || *keyword == '#')
363 if (!strcmp(keyword, "file")) {
364 char *filename = av_get_token((const char **)&cursor, SPACE_CHARS);
366 av_log(avf, AV_LOG_ERROR, "Line %d: filename required\n", line);
367 FAIL(AVERROR_INVALIDDATA);
369 if ((ret = add_file(avf, filename, &file, &nb_files_alloc)) < 0)
371 } else if (!strcmp(keyword, "duration") || !strcmp(keyword, "inpoint") || !strcmp(keyword, "outpoint")) {
372 char *dur_str = get_keyword(&cursor);
375 av_log(avf, AV_LOG_ERROR, "Line %d: %s without file\n",
377 FAIL(AVERROR_INVALIDDATA);
379 if ((ret = av_parse_time(&dur, dur_str, 1)) < 0) {
380 av_log(avf, AV_LOG_ERROR, "Line %d: invalid %s '%s'\n",
381 line, keyword, dur_str);
384 if (!strcmp(keyword, "duration"))
385 file->duration = dur;
386 else if (!strcmp(keyword, "inpoint"))
388 else if (!strcmp(keyword, "outpoint"))
389 file->outpoint = dur;
390 } else if (!strcmp(keyword, "file_packet_metadata")) {
392 metadata = av_get_token((const char **)&cursor, SPACE_CHARS);
394 av_log(avf, AV_LOG_ERROR, "Line %d: packet metadata required\n", line);
395 FAIL(AVERROR_INVALIDDATA);
397 if ((ret = av_dict_parse_string(&file->metadata, metadata, "=", "", 0)) < 0) {
398 av_log(avf, AV_LOG_ERROR, "Line %d: failed to parse metadata string\n", line);
400 FAIL(AVERROR_INVALIDDATA);
403 } else if (!strcmp(keyword, "stream")) {
404 if (!avformat_new_stream(avf, NULL))
405 FAIL(AVERROR(ENOMEM));
406 } else if (!strcmp(keyword, "exact_stream_id")) {
407 if (!avf->nb_streams) {
408 av_log(avf, AV_LOG_ERROR, "Line %d: exact_stream_id without stream\n",
410 FAIL(AVERROR_INVALIDDATA);
412 avf->streams[avf->nb_streams - 1]->id =
413 strtol(get_keyword(&cursor), NULL, 0);
414 } else if (!strcmp(keyword, "ffconcat")) {
415 char *ver_kw = get_keyword(&cursor);
416 char *ver_val = get_keyword(&cursor);
417 if (strcmp(ver_kw, "version") || strcmp(ver_val, "1.0")) {
418 av_log(avf, AV_LOG_ERROR, "Line %d: invalid version\n", line);
419 FAIL(AVERROR_INVALIDDATA);
424 av_log(avf, AV_LOG_ERROR, "Line %d: unknown keyword '%s'\n",
426 FAIL(AVERROR_INVALIDDATA);
432 FAIL(AVERROR_INVALIDDATA);
434 for (i = 0; i < cat->nb_files; i++) {
435 if (cat->files[i].start_time == AV_NOPTS_VALUE)
436 cat->files[i].start_time = time;
438 time = cat->files[i].start_time;
439 if (cat->files[i].duration == AV_NOPTS_VALUE) {
440 if (cat->files[i].inpoint == AV_NOPTS_VALUE || cat->files[i].outpoint == AV_NOPTS_VALUE)
442 cat->files[i].duration = cat->files[i].outpoint - cat->files[i].inpoint;
444 time += cat->files[i].duration;
446 if (i == cat->nb_files) {
447 avf->duration = time;
451 cat->stream_match_mode = avf->nb_streams ? MATCH_EXACT_ID :
453 if ((ret = open_file(avf, 0)) < 0)
458 concat_read_close(avf);
462 static int open_next_file(AVFormatContext *avf)
464 ConcatContext *cat = avf->priv_data;
465 unsigned fileno = cat->cur_file - cat->files;
467 if (cat->cur_file->duration == AV_NOPTS_VALUE) {
468 cat->cur_file->duration = cat->avf->duration;
469 if (cat->cur_file->inpoint != AV_NOPTS_VALUE)
470 cat->cur_file->duration -= (cat->cur_file->inpoint - cat->cur_file->file_start_time);
471 if (cat->cur_file->outpoint != AV_NOPTS_VALUE)
472 cat->cur_file->duration -= cat->avf->duration - (cat->cur_file->outpoint - cat->cur_file->file_start_time);
475 if (++fileno >= cat->nb_files) {
479 return open_file(avf, fileno);
482 static int filter_packet(AVFormatContext *avf, ConcatStream *cs, AVPacket *pkt)
484 AVStream *st = avf->streams[cs->out_stream_index];
485 AVBitStreamFilterContext *bsf;
489 av_assert0(cs->out_stream_index >= 0);
490 for (bsf = cs->bsf; bsf; bsf = bsf->next) {
492 ret = av_bitstream_filter_filter(bsf, st->codec, NULL,
493 &pkt2.data, &pkt2.size,
494 pkt->data, pkt->size,
495 !!(pkt->flags & AV_PKT_FLAG_KEY));
497 av_packet_unref(pkt);
500 av_assert0(pkt2.buf);
501 if (ret == 0 && pkt2.data != pkt->data) {
502 if ((ret = av_copy_packet(&pkt2, pkt)) < 0) {
510 pkt2.buf = av_buffer_create(pkt2.data, pkt2.size,
511 av_buffer_default_free, NULL, 0);
514 return AVERROR(ENOMEM);
522 /* Returns true if the packet dts is greater or equal to the specified outpoint. */
523 static int packet_after_outpoint(ConcatContext *cat, AVPacket *pkt)
525 if (cat->cur_file->outpoint != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE) {
526 return av_compare_ts(pkt->dts, cat->avf->streams[pkt->stream_index]->time_base,
527 cat->cur_file->outpoint, AV_TIME_BASE_Q) >= 0;
532 static int concat_read_packet(AVFormatContext *avf, AVPacket *pkt)
534 ConcatContext *cat = avf->priv_data;
547 ret = av_read_frame(cat->avf, pkt);
548 if (ret == AVERROR_EOF || packet_after_outpoint(cat, pkt)) {
550 av_packet_unref(pkt);
551 if ((ret = open_next_file(avf)) < 0)
557 if ((ret = match_streams(avf)) < 0) {
558 av_packet_unref(pkt);
561 cs = &cat->cur_file->streams[pkt->stream_index];
562 if (cs->out_stream_index < 0) {
563 av_packet_unref(pkt);
566 pkt->stream_index = cs->out_stream_index;
569 if ((ret = filter_packet(avf, cs, pkt)))
572 st = cat->avf->streams[pkt->stream_index];
573 av_log(avf, AV_LOG_DEBUG, "file:%d stream:%d pts:%s pts_time:%s dts:%s dts_time:%s",
574 (unsigned)(cat->cur_file - cat->files), pkt->stream_index,
575 av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
576 av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &st->time_base));
578 delta = av_rescale_q(cat->cur_file->start_time - cat->cur_file->file_inpoint,
580 cat->avf->streams[pkt->stream_index]->time_base);
581 if (pkt->pts != AV_NOPTS_VALUE)
583 if (pkt->dts != AV_NOPTS_VALUE)
585 av_log(avf, AV_LOG_DEBUG, " -> pts:%s pts_time:%s dts:%s dts_time:%s\n",
586 av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
587 av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &st->time_base));
588 if (cat->cur_file->metadata) {
591 char* packed_metadata = av_packet_pack_dictionary(cat->cur_file->metadata, &metadata_len);
592 if (!packed_metadata)
593 return AVERROR(ENOMEM);
594 if (!(metadata = av_packet_new_side_data(pkt, AV_PKT_DATA_STRINGS_METADATA, metadata_len))) {
595 av_freep(&packed_metadata);
596 return AVERROR(ENOMEM);
598 memcpy(metadata, packed_metadata, metadata_len);
599 av_freep(&packed_metadata);
604 static void rescale_interval(AVRational tb_in, AVRational tb_out,
605 int64_t *min_ts, int64_t *ts, int64_t *max_ts)
607 *ts = av_rescale_q (* ts, tb_in, tb_out);
608 *min_ts = av_rescale_q_rnd(*min_ts, tb_in, tb_out,
609 AV_ROUND_UP | AV_ROUND_PASS_MINMAX);
610 *max_ts = av_rescale_q_rnd(*max_ts, tb_in, tb_out,
611 AV_ROUND_DOWN | AV_ROUND_PASS_MINMAX);
614 static int try_seek(AVFormatContext *avf, int stream,
615 int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
617 ConcatContext *cat = avf->priv_data;
618 int64_t t0 = cat->cur_file->start_time - cat->cur_file->file_inpoint;
621 min_ts = min_ts == INT64_MIN ? INT64_MIN : min_ts - t0;
622 max_ts = max_ts == INT64_MAX ? INT64_MAX : max_ts - t0;
624 if (stream >= cat->avf->nb_streams)
626 rescale_interval(AV_TIME_BASE_Q, cat->avf->streams[stream]->time_base,
627 &min_ts, &ts, &max_ts);
629 return avformat_seek_file(cat->avf, stream, min_ts, ts, max_ts, flags);
632 static int real_seek(AVFormatContext *avf, int stream,
633 int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
635 ConcatContext *cat = avf->priv_data;
636 int ret, left, right;
639 if (stream >= avf->nb_streams)
640 return AVERROR(EINVAL);
641 rescale_interval(avf->streams[stream]->time_base, AV_TIME_BASE_Q,
642 &min_ts, &ts, &max_ts);
646 right = cat->nb_files;
647 while (right - left > 1) {
648 int mid = (left + right) / 2;
649 if (ts < cat->files[mid].start_time)
655 if ((ret = open_file(avf, left)) < 0)
658 ret = try_seek(avf, stream, min_ts, ts, max_ts, flags);
660 left < cat->nb_files - 1 &&
661 cat->files[left + 1].start_time < max_ts) {
662 if ((ret = open_file(avf, left + 1)) < 0)
664 ret = try_seek(avf, stream, min_ts, ts, max_ts, flags);
669 static int concat_seek(AVFormatContext *avf, int stream,
670 int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
672 ConcatContext *cat = avf->priv_data;
673 ConcatFile *cur_file_saved = cat->cur_file;
674 AVFormatContext *cur_avf_saved = cat->avf;
678 return AVERROR(ESPIPE); /* XXX: can we use it? */
679 if (flags & (AVSEEK_FLAG_BYTE | AVSEEK_FLAG_FRAME))
680 return AVERROR(ENOSYS);
682 if ((ret = real_seek(avf, stream, min_ts, ts, max_ts, flags)) < 0) {
684 avformat_close_input(&cat->avf);
685 cat->avf = cur_avf_saved;
686 cat->cur_file = cur_file_saved;
688 avformat_close_input(&cur_avf_saved);
694 #define OFFSET(x) offsetof(ConcatContext, x)
695 #define DEC AV_OPT_FLAG_DECODING_PARAM
697 static const AVOption options[] = {
698 { "safe", "enable safe mode",
699 OFFSET(safe), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 1, DEC },
700 { "auto_convert", "automatically convert bitstream format",
701 OFFSET(auto_convert), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, DEC },
705 static const AVClass concat_class = {
706 .class_name = "concat demuxer",
707 .item_name = av_default_item_name,
709 .version = LIBAVUTIL_VERSION_INT,
713 AVInputFormat ff_concat_demuxer = {
715 .long_name = NULL_IF_CONFIG_SMALL("Virtual concatenation script"),
716 .priv_data_size = sizeof(ConcatContext),
717 .read_probe = concat_probe,
718 .read_header = concat_read_header,
719 .read_packet = concat_read_packet,
720 .read_close = concat_read_close,
721 .read_seek2 = concat_seek,
722 .priv_class = &concat_class,