3 * Copyright (c) 2012 Nicolas George
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public License
9 * as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
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
15 * GNU Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public License
18 * along with FFmpeg; if not, write to the Free Software * Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #include "libavutil/avutil.h"
24 #include "libavutil/avstring.h"
25 #include "libavutil/opt.h"
28 #include "avio_internal.h"
34 AVBitStreamFilterContext **bsfs; ///< bitstream filters per stream
36 /** map from input to output streams indexes,
37 * disabled output streams are set to -1 */
41 typedef struct TeeContext {
44 TeeSlave slaves[MAX_SLAVES];
47 static const char *const slave_delim = "|";
48 static const char *const slave_opt_open = "[";
49 static const char *const slave_opt_close = "]";
50 static const char *const slave_opt_delim = ":]"; /* must have the close too */
51 static const char *const slave_bsfs_spec_sep = "/";
52 static const char *const slave_select_sep = ",";
54 static const AVClass tee_muxer_class = {
55 .class_name = "Tee muxer",
56 .item_name = av_default_item_name,
57 .version = LIBAVUTIL_VERSION_INT,
60 static int parse_slave_options(void *log, char *slave,
61 AVDictionary **options, char **filename)
67 if (!strspn(slave, slave_opt_open)) {
72 if (strspn(p, slave_opt_close)) {
73 *filename = (char *)p + 1;
77 ret = av_opt_get_key_value(&p, "=", slave_opt_delim, 0, &key, &val);
79 av_log(log, AV_LOG_ERROR, "No option found near \"%s\"\n", p);
82 ret = av_dict_set(options, key, val,
83 AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL);
86 if (strspn(p, slave_opt_close))
90 *filename = (char *)p + 1;
94 av_dict_free(options);
99 * Parse list of bitstream filters and add them to the list of filters
100 * pointed to by bsfs.
102 * The list must be specified in the form:
103 * BSFS ::= BSF[,BSFS]
105 static int parse_bsfs(void *log_ctx, const char *bsfs_spec,
106 AVBitStreamFilterContext **bsfs)
108 char *bsf_name, *buf, *dup, *saveptr;
111 if (!(dup = buf = av_strdup(bsfs_spec)))
112 return AVERROR(ENOMEM);
114 while (bsf_name = av_strtok(buf, ",", &saveptr)) {
115 AVBitStreamFilterContext *bsf = av_bitstream_filter_init(bsf_name);
118 av_log(log_ctx, AV_LOG_ERROR,
119 "Cannot initialize bitstream filter with name '%s', "
120 "unknown filter or internal error happened\n",
122 ret = AVERROR_UNKNOWN;
126 /* append bsf context to the list of bsf contexts */
138 static int open_slave(AVFormatContext *avf, char *slave, TeeSlave *tee_slave)
141 AVDictionary *options = NULL;
142 AVDictionaryEntry *entry;
144 char *format = NULL, *select = NULL;
145 AVFormatContext *avf2 = NULL;
149 char *subselect = NULL, *next_subselect = NULL, *first_subselect = NULL, *tmp_select = NULL;
151 if ((ret = parse_slave_options(avf, slave, &options, &filename)) < 0)
154 #define STEAL_OPTION(option, field) do { \
155 if ((entry = av_dict_get(options, option, NULL, 0))) { \
156 field = entry->value; \
157 entry->value = NULL; /* prevent it from being freed */ \
158 av_dict_set(&options, option, NULL, 0); \
162 STEAL_OPTION("f", format);
163 STEAL_OPTION("select", select);
165 ret = avformat_alloc_output_context2(&avf2, NULL, format, filename);
168 av_dict_copy(&avf2->metadata, avf->metadata, 0);
169 avf2->opaque = avf->opaque;
170 avf2->io_open = avf->io_open;
171 avf2->io_close = avf->io_close;
173 tee_slave->stream_map = av_calloc(avf->nb_streams, sizeof(*tee_slave->stream_map));
174 if (!tee_slave->stream_map) {
175 ret = AVERROR(ENOMEM);
180 for (i = 0; i < avf->nb_streams; i++) {
181 st = avf->streams[i];
183 tmp_select = av_strdup(select); // av_strtok is destructive so we regenerate it in each loop
185 ret = AVERROR(ENOMEM);
189 first_subselect = tmp_select;
190 next_subselect = NULL;
191 while (subselect = av_strtok(first_subselect, slave_select_sep, &next_subselect)) {
192 first_subselect = NULL;
194 ret = avformat_match_stream_specifier(avf, avf->streams[i], subselect);
196 av_log(avf, AV_LOG_ERROR,
197 "Invalid stream specifier '%s' for output '%s'\n",
202 fullret = 1; // match
206 av_freep(&tmp_select);
208 if (fullret == 0) { /* no match */
209 tee_slave->stream_map[i] = -1;
213 tee_slave->stream_map[i] = stream_count++;
215 if (!(st2 = avformat_new_stream(avf2, NULL))) {
216 ret = AVERROR(ENOMEM);
220 st2->r_frame_rate = st->r_frame_rate;
221 st2->time_base = st->time_base;
222 st2->start_time = st->start_time;
223 st2->duration = st->duration;
224 st2->nb_frames = st->nb_frames;
225 st2->disposition = st->disposition;
226 st2->sample_aspect_ratio = st->sample_aspect_ratio;
227 st2->avg_frame_rate = st->avg_frame_rate;
228 av_dict_copy(&st2->metadata, st->metadata, 0);
229 if ((ret = avcodec_copy_context(st2->codec, st->codec)) < 0)
233 if (!(avf2->oformat->flags & AVFMT_NOFILE)) {
234 if ((ret = avf2->io_open(avf2, &avf2->pb, filename, AVIO_FLAG_WRITE, NULL)) < 0) {
235 av_log(avf, AV_LOG_ERROR, "Slave '%s': error opening: %s\n",
236 slave, av_err2str(ret));
241 if ((ret = avformat_write_header(avf2, &options)) < 0) {
242 av_log(avf, AV_LOG_ERROR, "Slave '%s': error writing header: %s\n",
243 slave, av_err2str(ret));
247 tee_slave->avf = avf2;
248 tee_slave->bsfs = av_calloc(avf2->nb_streams, sizeof(TeeSlave));
249 if (!tee_slave->bsfs) {
250 ret = AVERROR(ENOMEM);
255 while (entry = av_dict_get(options, "bsfs", NULL, AV_DICT_IGNORE_SUFFIX)) {
256 const char *spec = entry->key + strlen("bsfs");
258 if (strspn(spec, slave_bsfs_spec_sep) != 1) {
259 av_log(avf, AV_LOG_ERROR,
260 "Specifier separator in '%s' is '%c', but only characters '%s' "
261 "are allowed\n", entry->key, *spec, slave_bsfs_spec_sep);
262 return AVERROR(EINVAL);
264 spec++; /* consume separator */
267 for (i = 0; i < avf2->nb_streams; i++) {
268 ret = avformat_match_stream_specifier(avf2, avf2->streams[i], spec);
270 av_log(avf, AV_LOG_ERROR,
271 "Invalid stream specifier '%s' in bsfs option '%s' for slave "
272 "output '%s'\n", spec, entry->key, filename);
277 av_log(avf, AV_LOG_DEBUG, "spec:%s bsfs:%s matches stream %d of slave "
278 "output '%s'\n", spec, entry->value, i, filename);
279 if (tee_slave->bsfs[i]) {
280 av_log(avf, AV_LOG_WARNING,
281 "Duplicate bsfs specification associated to stream %d of slave "
282 "output '%s', filters will be ignored\n", i, filename);
285 ret = parse_bsfs(avf, entry->value, &tee_slave->bsfs[i]);
287 av_log(avf, AV_LOG_ERROR,
288 "Error parsing bitstream filter sequence '%s' associated to "
289 "stream %d of slave output '%s'\n", entry->value, i, filename);
295 av_dict_set(&options, entry->key, NULL, 0);
300 while ((entry = av_dict_get(options, "", entry, AV_DICT_IGNORE_SUFFIX)))
301 av_log(avf2, AV_LOG_ERROR, "Unknown option '%s'\n", entry->key);
302 ret = AVERROR_OPTION_NOT_FOUND;
309 av_dict_free(&options);
310 av_freep(&tmp_select);
314 static void close_slaves(AVFormatContext *avf)
316 TeeContext *tee = avf->priv_data;
317 AVFormatContext *avf2;
320 for (i = 0; i < tee->nb_slaves; i++) {
321 avf2 = tee->slaves[i].avf;
323 for (j = 0; j < avf2->nb_streams; j++) {
324 AVBitStreamFilterContext *bsf_next, *bsf = tee->slaves[i].bsfs[j];
326 bsf_next = bsf->next;
327 av_bitstream_filter_close(bsf);
331 av_freep(&tee->slaves[i].stream_map);
332 av_freep(&tee->slaves[i].bsfs);
334 ff_format_io_close(avf2, &avf2->pb);
335 avformat_free_context(avf2);
336 tee->slaves[i].avf = NULL;
340 static void log_slave(TeeSlave *slave, void *log_ctx, int log_level)
343 av_log(log_ctx, log_level, "filename:'%s' format:%s\n",
344 slave->avf->filename, slave->avf->oformat->name);
345 for (i = 0; i < slave->avf->nb_streams; i++) {
346 AVStream *st = slave->avf->streams[i];
347 AVBitStreamFilterContext *bsf = slave->bsfs[i];
349 av_log(log_ctx, log_level, " stream:%d codec:%s type:%s",
350 i, avcodec_get_name(st->codec->codec_id),
351 av_get_media_type_string(st->codec->codec_type));
353 av_log(log_ctx, log_level, " bsfs:");
355 av_log(log_ctx, log_level, "%s%s",
356 bsf->filter->name, bsf->next ? "," : "");
360 av_log(log_ctx, log_level, "\n");
364 static int tee_write_header(AVFormatContext *avf)
366 TeeContext *tee = avf->priv_data;
367 unsigned nb_slaves = 0, i;
368 const char *filename = avf->filename;
369 char *slaves[MAX_SLAVES];
373 if (nb_slaves == MAX_SLAVES) {
374 av_log(avf, AV_LOG_ERROR, "Maximum %d slave muxers reached.\n",
376 ret = AVERROR_PATCHWELCOME;
379 if (!(slaves[nb_slaves++] = av_get_token(&filename, slave_delim))) {
380 ret = AVERROR(ENOMEM);
383 if (strspn(filename, slave_delim))
387 for (i = 0; i < nb_slaves; i++) {
388 if ((ret = open_slave(avf, slaves[i], &tee->slaves[i])) < 0)
390 log_slave(&tee->slaves[i], avf, AV_LOG_VERBOSE);
391 av_freep(&slaves[i]);
394 tee->nb_slaves = nb_slaves;
396 for (i = 0; i < avf->nb_streams; i++) {
398 for (j = 0; j < tee->nb_slaves; j++)
399 mapped += tee->slaves[j].stream_map[i] >= 0;
401 av_log(avf, AV_LOG_WARNING, "Input stream #%d is not mapped "
402 "to any slave.\n", i);
407 for (i = 0; i < nb_slaves; i++)
408 av_freep(&slaves[i]);
413 static int tee_write_trailer(AVFormatContext *avf)
415 TeeContext *tee = avf->priv_data;
416 AVFormatContext *avf2;
417 int ret_all = 0, ret;
420 for (i = 0; i < tee->nb_slaves; i++) {
421 avf2 = tee->slaves[i].avf;
422 if ((ret = av_write_trailer(avf2)) < 0)
425 if (!(avf2->oformat->flags & AVFMT_NOFILE))
426 ff_format_io_close(avf2, &avf2->pb);
432 static int tee_write_packet(AVFormatContext *avf, AVPacket *pkt)
434 TeeContext *tee = avf->priv_data;
435 AVFormatContext *avf2;
437 int ret_all = 0, ret;
442 for (i = 0; i < tee->nb_slaves; i++) {
443 avf2 = tee->slaves[i].avf;
444 s = pkt->stream_index;
445 s2 = tee->slaves[i].stream_map[s];
449 if ((ret = av_copy_packet(&pkt2, pkt)) < 0 ||
450 (ret = av_dup_packet(&pkt2))< 0)
455 tb = avf ->streams[s ]->time_base;
456 tb2 = avf2->streams[s2]->time_base;
457 pkt2.pts = av_rescale_q(pkt->pts, tb, tb2);
458 pkt2.dts = av_rescale_q(pkt->dts, tb, tb2);
459 pkt2.duration = av_rescale_q(pkt->duration, tb, tb2);
460 pkt2.stream_index = s2;
462 if ((ret = av_apply_bitstream_filters(avf2->streams[s2]->codec, &pkt2,
463 tee->slaves[i].bsfs[s2])) < 0 ||
464 (ret = av_interleaved_write_frame(avf2, &pkt2)) < 0)
471 AVOutputFormat ff_tee_muxer = {
473 .long_name = NULL_IF_CONFIG_SMALL("Multiple muxer tee"),
474 .priv_data_size = sizeof(TeeContext),
475 .write_header = tee_write_header,
476 .write_trailer = tee_write_trailer,
477 .write_packet = tee_write_packet,
478 .priv_class = &tee_muxer_class,
479 .flags = AVFMT_NOFILE,