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"
27 #include "avio_internal.h"
33 AVBitStreamFilterContext **bsfs; ///< bitstream filters per stream
35 /** map from input to output streams indexes,
36 * disabled output streams are set to -1 */
40 typedef struct TeeContext {
43 TeeSlave slaves[MAX_SLAVES];
46 static const char *const slave_delim = "|";
47 static const char *const slave_opt_open = "[";
48 static const char *const slave_opt_close = "]";
49 static const char *const slave_opt_delim = ":]"; /* must have the close too */
50 static const char *const slave_bsfs_spec_sep = "/";
51 static const char *const slave_select_sep = ",";
53 static const AVClass tee_muxer_class = {
54 .class_name = "Tee muxer",
55 .item_name = av_default_item_name,
56 .version = LIBAVUTIL_VERSION_INT,
59 static int parse_slave_options(void *log, char *slave,
60 AVDictionary **options, char **filename)
66 if (!strspn(slave, slave_opt_open)) {
71 if (strspn(p, slave_opt_close)) {
72 *filename = (char *)p + 1;
76 ret = av_opt_get_key_value(&p, "=", slave_opt_delim, 0, &key, &val);
78 av_log(log, AV_LOG_ERROR, "No option found near \"%s\"\n", p);
81 ret = av_dict_set(options, key, val,
82 AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL);
85 if (strspn(p, slave_opt_close))
89 *filename = (char *)p + 1;
93 av_dict_free(options);
98 * Parse list of bitstream filters and add them to the list of filters
101 * The list must be specified in the form:
102 * BSFS ::= BSF[,BSFS]
104 static int parse_bsfs(void *log_ctx, const char *bsfs_spec,
105 AVBitStreamFilterContext **bsfs)
107 char *bsf_name, *buf, *dup, *saveptr;
110 if (!(dup = buf = av_strdup(bsfs_spec)))
111 return AVERROR(ENOMEM);
113 while (bsf_name = av_strtok(buf, ",", &saveptr)) {
114 AVBitStreamFilterContext *bsf = av_bitstream_filter_init(bsf_name);
117 av_log(log_ctx, AV_LOG_ERROR,
118 "Cannot initialize bitstream filter with name '%s', "
119 "unknown filter or internal error happened\n",
121 ret = AVERROR_UNKNOWN;
125 /* append bsf context to the list of bsf contexts */
137 static int open_slave(AVFormatContext *avf, char *slave, TeeSlave *tee_slave)
140 AVDictionary *options = NULL;
141 AVDictionaryEntry *entry;
143 char *format = NULL, *select = NULL;
144 AVFormatContext *avf2 = NULL;
148 char *subselect = NULL, *next_subselect = NULL, *first_subselect = NULL, *tmp_select = NULL;
150 if ((ret = parse_slave_options(avf, slave, &options, &filename)) < 0)
153 #define STEAL_OPTION(option, field) do { \
154 if ((entry = av_dict_get(options, option, NULL, 0))) { \
155 field = entry->value; \
156 entry->value = NULL; /* prevent it from being freed */ \
157 av_dict_set(&options, option, NULL, 0); \
161 STEAL_OPTION("f", format);
162 STEAL_OPTION("select", select);
164 ret = avformat_alloc_output_context2(&avf2, NULL, format, filename);
167 av_dict_copy(&avf2->metadata, avf->metadata, 0);
169 tee_slave->stream_map = av_calloc(avf->nb_streams, sizeof(*tee_slave->stream_map));
170 if (!tee_slave->stream_map) {
171 ret = AVERROR(ENOMEM);
176 for (i = 0; i < avf->nb_streams; i++) {
177 st = avf->streams[i];
179 tmp_select = av_strdup(select); // av_strtok is destructive so we regenerate it in each loop
181 ret = AVERROR(ENOMEM);
185 first_subselect = tmp_select;
186 next_subselect = NULL;
187 while (subselect = av_strtok(first_subselect, slave_select_sep, &next_subselect)) {
188 first_subselect = NULL;
190 ret = avformat_match_stream_specifier(avf, avf->streams[i], subselect);
192 av_log(avf, AV_LOG_ERROR,
193 "Invalid stream specifier '%s' for output '%s'\n",
198 fullret = 1; // match
202 av_freep(&tmp_select);
204 if (fullret == 0) { /* no match */
205 tee_slave->stream_map[i] = -1;
209 tee_slave->stream_map[i] = stream_count++;
211 if (!(st2 = avformat_new_stream(avf2, NULL))) {
212 ret = AVERROR(ENOMEM);
216 st2->r_frame_rate = st->r_frame_rate;
217 st2->time_base = st->time_base;
218 st2->start_time = st->start_time;
219 st2->duration = st->duration;
220 st2->nb_frames = st->nb_frames;
221 st2->disposition = st->disposition;
222 st2->sample_aspect_ratio = st->sample_aspect_ratio;
223 st2->avg_frame_rate = st->avg_frame_rate;
224 av_dict_copy(&st2->metadata, st->metadata, 0);
225 if ((ret = avcodec_copy_context(st2->codec, st->codec)) < 0)
229 if (!(avf2->oformat->flags & AVFMT_NOFILE)) {
230 if ((ret = ffio_open_whitelist(&avf2->pb, filename, AVIO_FLAG_WRITE,
231 &avf->interrupt_callback, NULL,
232 avf->protocol_whitelist)) < 0) {
233 av_log(avf, AV_LOG_ERROR, "Slave '%s': error opening: %s\n",
234 slave, av_err2str(ret));
239 if ((ret = avformat_write_header(avf2, &options)) < 0) {
240 av_log(avf, AV_LOG_ERROR, "Slave '%s': error writing header: %s\n",
241 slave, av_err2str(ret));
245 tee_slave->avf = avf2;
246 tee_slave->bsfs = av_calloc(avf2->nb_streams, sizeof(TeeSlave));
247 if (!tee_slave->bsfs) {
248 ret = AVERROR(ENOMEM);
253 while (entry = av_dict_get(options, "bsfs", NULL, AV_DICT_IGNORE_SUFFIX)) {
254 const char *spec = entry->key + strlen("bsfs");
256 if (strspn(spec, slave_bsfs_spec_sep) != 1) {
257 av_log(avf, AV_LOG_ERROR,
258 "Specifier separator in '%s' is '%c', but only characters '%s' "
259 "are allowed\n", entry->key, *spec, slave_bsfs_spec_sep);
260 return AVERROR(EINVAL);
262 spec++; /* consume separator */
265 for (i = 0; i < avf2->nb_streams; i++) {
266 ret = avformat_match_stream_specifier(avf2, avf2->streams[i], spec);
268 av_log(avf, AV_LOG_ERROR,
269 "Invalid stream specifier '%s' in bsfs option '%s' for slave "
270 "output '%s'\n", spec, entry->key, filename);
275 av_log(avf, AV_LOG_DEBUG, "spec:%s bsfs:%s matches stream %d of slave "
276 "output '%s'\n", spec, entry->value, i, filename);
277 if (tee_slave->bsfs[i]) {
278 av_log(avf, AV_LOG_WARNING,
279 "Duplicate bsfs specification associated to stream %d of slave "
280 "output '%s', filters will be ignored\n", i, filename);
283 ret = parse_bsfs(avf, entry->value, &tee_slave->bsfs[i]);
285 av_log(avf, AV_LOG_ERROR,
286 "Error parsing bitstream filter sequence '%s' associated to "
287 "stream %d of slave output '%s'\n", entry->value, i, filename);
293 av_dict_set(&options, entry->key, NULL, 0);
298 while ((entry = av_dict_get(options, "", entry, AV_DICT_IGNORE_SUFFIX)))
299 av_log(avf2, AV_LOG_ERROR, "Unknown option '%s'\n", entry->key);
300 ret = AVERROR_OPTION_NOT_FOUND;
307 av_dict_free(&options);
308 av_freep(&tmp_select);
312 static void close_slaves(AVFormatContext *avf)
314 TeeContext *tee = avf->priv_data;
315 AVFormatContext *avf2;
318 for (i = 0; i < tee->nb_slaves; i++) {
319 avf2 = tee->slaves[i].avf;
321 for (j = 0; j < avf2->nb_streams; j++) {
322 AVBitStreamFilterContext *bsf_next, *bsf = tee->slaves[i].bsfs[j];
324 bsf_next = bsf->next;
325 av_bitstream_filter_close(bsf);
329 av_freep(&tee->slaves[i].stream_map);
330 av_freep(&tee->slaves[i].bsfs);
332 avio_closep(&avf2->pb);
333 avformat_free_context(avf2);
334 tee->slaves[i].avf = NULL;
338 static void log_slave(TeeSlave *slave, void *log_ctx, int log_level)
341 av_log(log_ctx, log_level, "filename:'%s' format:%s\n",
342 slave->avf->filename, slave->avf->oformat->name);
343 for (i = 0; i < slave->avf->nb_streams; i++) {
344 AVStream *st = slave->avf->streams[i];
345 AVBitStreamFilterContext *bsf = slave->bsfs[i];
347 av_log(log_ctx, log_level, " stream:%d codec:%s type:%s",
348 i, avcodec_get_name(st->codec->codec_id),
349 av_get_media_type_string(st->codec->codec_type));
351 av_log(log_ctx, log_level, " bsfs:");
353 av_log(log_ctx, log_level, "%s%s",
354 bsf->filter->name, bsf->next ? "," : "");
358 av_log(log_ctx, log_level, "\n");
362 static int tee_write_header(AVFormatContext *avf)
364 TeeContext *tee = avf->priv_data;
365 unsigned nb_slaves = 0, i;
366 const char *filename = avf->filename;
367 char *slaves[MAX_SLAVES];
371 if (nb_slaves == MAX_SLAVES) {
372 av_log(avf, AV_LOG_ERROR, "Maximum %d slave muxers reached.\n",
374 ret = AVERROR_PATCHWELCOME;
377 if (!(slaves[nb_slaves++] = av_get_token(&filename, slave_delim))) {
378 ret = AVERROR(ENOMEM);
381 if (strspn(filename, slave_delim))
385 for (i = 0; i < nb_slaves; i++) {
386 if ((ret = open_slave(avf, slaves[i], &tee->slaves[i])) < 0)
388 log_slave(&tee->slaves[i], avf, AV_LOG_VERBOSE);
389 av_freep(&slaves[i]);
392 tee->nb_slaves = nb_slaves;
394 for (i = 0; i < avf->nb_streams; i++) {
396 for (j = 0; j < tee->nb_slaves; j++)
397 mapped += tee->slaves[j].stream_map[i] >= 0;
399 av_log(avf, AV_LOG_WARNING, "Input stream #%d is not mapped "
400 "to any slave.\n", i);
405 for (i = 0; i < nb_slaves; i++)
406 av_freep(&slaves[i]);
411 static int tee_write_trailer(AVFormatContext *avf)
413 TeeContext *tee = avf->priv_data;
414 AVFormatContext *avf2;
415 int ret_all = 0, ret;
418 for (i = 0; i < tee->nb_slaves; i++) {
419 avf2 = tee->slaves[i].avf;
420 if ((ret = av_write_trailer(avf2)) < 0)
423 if (!(avf2->oformat->flags & AVFMT_NOFILE)) {
424 if ((ret = avio_closep(&avf2->pb)) < 0)
433 static int tee_write_packet(AVFormatContext *avf, AVPacket *pkt)
435 TeeContext *tee = avf->priv_data;
436 AVFormatContext *avf2;
438 int ret_all = 0, ret;
443 for (i = 0; i < tee->nb_slaves; i++) {
444 avf2 = tee->slaves[i].avf;
445 s = pkt->stream_index;
446 s2 = tee->slaves[i].stream_map[s];
450 if ((ret = av_copy_packet(&pkt2, pkt)) < 0 ||
451 (ret = av_dup_packet(&pkt2))< 0)
456 tb = avf ->streams[s ]->time_base;
457 tb2 = avf2->streams[s2]->time_base;
458 pkt2.pts = av_rescale_q(pkt->pts, tb, tb2);
459 pkt2.dts = av_rescale_q(pkt->dts, tb, tb2);
460 pkt2.duration = av_rescale_q(pkt->duration, tb, tb2);
461 pkt2.stream_index = s2;
463 if ((ret = av_apply_bitstream_filters(avf2->streams[s2]->codec, &pkt2,
464 tee->slaves[i].bsfs[s2])) < 0 ||
465 (ret = av_interleaved_write_frame(avf2, &pkt2)) < 0)
472 AVOutputFormat ff_tee_muxer = {
474 .long_name = NULL_IF_CONFIG_SMALL("Multiple muxer tee"),
475 .priv_data_size = sizeof(TeeContext),
476 .write_header = tee_write_header,
477 .write_trailer = tee_write_trailer,
478 .write_packet = tee_write_packet,
479 .priv_class = &tee_muxer_class,
480 .flags = AVFMT_NOFILE,