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"
32 AVBitStreamFilterContext **bsfs; ///< bitstream filters per stream
34 /** map from input to output streams indexes,
35 * disabled output streams are set to -1 */
39 typedef struct TeeContext {
42 TeeSlave slaves[MAX_SLAVES];
45 static const char *const slave_delim = "|";
46 static const char *const slave_opt_open = "[";
47 static const char *const slave_opt_close = "]";
48 static const char *const slave_opt_delim = ":]"; /* must have the close too */
49 static const char *const slave_bsfs_spec_sep = "/";
51 static const AVClass tee_muxer_class = {
52 .class_name = "Tee muxer",
53 .item_name = av_default_item_name,
54 .version = LIBAVUTIL_VERSION_INT,
57 static int parse_slave_options(void *log, char *slave,
58 AVDictionary **options, char **filename)
64 if (!strspn(slave, slave_opt_open)) {
69 if (strspn(p, slave_opt_close)) {
70 *filename = (char *)p + 1;
74 ret = av_opt_get_key_value(&p, "=", slave_opt_delim, 0, &key, &val);
76 av_log(log, AV_LOG_ERROR, "No option found near \"%s\"\n", p);
79 ret = av_dict_set(options, key, val,
80 AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL);
83 if (strspn(p, slave_opt_close))
87 *filename = (char *)p + 1;
91 av_dict_free(options);
96 * Parse list of bitstream filters and add them to the list of filters
99 * The list must be specified in the form:
100 * BSFS ::= BSF[,BSFS]
102 static int parse_bsfs(void *log_ctx, const char *bsfs_spec,
103 AVBitStreamFilterContext **bsfs)
105 char *bsf_name, *buf, *saveptr;
108 if (!(buf = av_strdup(bsfs_spec)))
109 return AVERROR(ENOMEM);
111 while (bsf_name = av_strtok(buf, ",", &saveptr)) {
112 AVBitStreamFilterContext *bsf = av_bitstream_filter_init(bsf_name);
115 av_log(log_ctx, AV_LOG_ERROR,
116 "Cannot initialize bitstream filter with name '%s', "
117 "unknown filter or internal error happened\n",
119 ret = AVERROR_UNKNOWN;
123 /* append bsf context to the list of bsf contexts */
135 static int open_slave(AVFormatContext *avf, char *slave, TeeSlave *tee_slave)
138 AVDictionary *options = NULL;
139 AVDictionaryEntry *entry;
141 char *format = NULL, *select = NULL;
142 AVFormatContext *avf2 = NULL;
146 if ((ret = parse_slave_options(avf, slave, &options, &filename)) < 0)
149 #define STEAL_OPTION(option, field) do { \
150 if ((entry = av_dict_get(options, option, NULL, 0))) { \
151 field = entry->value; \
152 entry->value = NULL; /* prevent it from being freed */ \
153 av_dict_set(&options, option, NULL, 0); \
157 STEAL_OPTION("f", format);
158 STEAL_OPTION("select", select);
160 ret = avformat_alloc_output_context2(&avf2, NULL, format, filename);
163 av_dict_copy(&avf2->metadata, avf->metadata, 0);
165 tee_slave->stream_map = av_calloc(avf->nb_streams, sizeof(*tee_slave->stream_map));
166 if (!tee_slave->stream_map) {
167 ret = AVERROR(ENOMEM);
172 for (i = 0; i < avf->nb_streams; i++) {
173 st = avf->streams[i];
175 ret = avformat_match_stream_specifier(avf, avf->streams[i], select);
177 av_log(avf, AV_LOG_ERROR,
178 "Invalid stream specifier '%s' for output '%s'\n",
183 if (ret == 0) { /* no match */
184 tee_slave->stream_map[i] = -1;
188 tee_slave->stream_map[i] = stream_count++;
190 if (!(st2 = avformat_new_stream(avf2, NULL))) {
191 ret = AVERROR(ENOMEM);
195 st2->r_frame_rate = st->r_frame_rate;
196 st2->time_base = st->time_base;
197 st2->start_time = st->start_time;
198 st2->duration = st->duration;
199 st2->nb_frames = st->nb_frames;
200 st2->disposition = st->disposition;
201 st2->sample_aspect_ratio = st->sample_aspect_ratio;
202 st2->avg_frame_rate = st->avg_frame_rate;
203 av_dict_copy(&st2->metadata, st->metadata, 0);
204 if ((ret = avcodec_copy_context(st2->codec, st->codec)) < 0)
208 if (!(avf2->oformat->flags & AVFMT_NOFILE)) {
209 if ((ret = avio_open(&avf2->pb, filename, AVIO_FLAG_WRITE)) < 0) {
210 av_log(avf, AV_LOG_ERROR, "Slave '%s': error opening: %s\n",
211 slave, av_err2str(ret));
216 if ((ret = avformat_write_header(avf2, &options)) < 0) {
217 av_log(avf, AV_LOG_ERROR, "Slave '%s': error writing header: %s\n",
218 slave, av_err2str(ret));
222 tee_slave->avf = avf2;
223 tee_slave->bsfs = av_calloc(avf2->nb_streams, sizeof(TeeSlave));
224 if (!tee_slave->bsfs) {
225 ret = AVERROR(ENOMEM);
230 while (entry = av_dict_get(options, "bsfs", NULL, AV_DICT_IGNORE_SUFFIX)) {
231 const char *spec = entry->key + strlen("bsfs");
233 if (strspn(spec, slave_bsfs_spec_sep) != 1) {
234 av_log(avf, AV_LOG_ERROR,
235 "Specifier separator in '%s' is '%c', but only characters '%s' "
236 "are allowed\n", entry->key, *spec, slave_bsfs_spec_sep);
237 return AVERROR(EINVAL);
239 spec++; /* consume separator */
242 for (i = 0; i < avf2->nb_streams; i++) {
243 ret = avformat_match_stream_specifier(avf2, avf2->streams[i], spec);
245 av_log(avf, AV_LOG_ERROR,
246 "Invalid stream specifier '%s' in bsfs option '%s' for slave "
247 "output '%s'\n", spec, entry->key, filename);
252 av_log(avf, AV_LOG_DEBUG, "spec:%s bsfs:%s matches stream %d of slave "
253 "output '%s'\n", spec, entry->value, i, filename);
254 if (tee_slave->bsfs[i]) {
255 av_log(avf, AV_LOG_WARNING,
256 "Duplicate bsfs specification associated to stream %d of slave "
257 "output '%s', filters will be ignored\n", i, filename);
260 ret = parse_bsfs(avf, entry->value, &tee_slave->bsfs[i]);
262 av_log(avf, AV_LOG_ERROR,
263 "Error parsing bitstream filter sequence '%s' associated to "
264 "stream %d of slave output '%s'\n", entry->value, i, filename);
270 av_dict_set(&options, entry->key, NULL, 0);
275 while ((entry = av_dict_get(options, "", entry, AV_DICT_IGNORE_SUFFIX)))
276 av_log(avf2, AV_LOG_ERROR, "Unknown option '%s'\n", entry->key);
277 ret = AVERROR_OPTION_NOT_FOUND;
283 av_dict_free(&options);
287 static void close_slaves(AVFormatContext *avf)
289 TeeContext *tee = avf->priv_data;
290 AVFormatContext *avf2;
293 for (i = 0; i < tee->nb_slaves; i++) {
294 avf2 = tee->slaves[i].avf;
296 for (j = 0; j < avf2->nb_streams; j++) {
297 AVBitStreamFilterContext *bsf_next, *bsf = tee->slaves[i].bsfs[j];
299 bsf_next = bsf->next;
300 av_bitstream_filter_close(bsf);
304 av_freep(&tee->slaves[i].stream_map);
306 avio_close(avf2->pb);
308 avformat_free_context(avf2);
309 tee->slaves[i].avf = NULL;
313 static void log_slave(TeeSlave *slave, void *log_ctx, int log_level)
316 av_log(log_ctx, log_level, "filename:'%s' format:%s\n",
317 slave->avf->filename, slave->avf->oformat->name);
318 for (i = 0; i < slave->avf->nb_streams; i++) {
319 AVStream *st = slave->avf->streams[i];
320 AVBitStreamFilterContext *bsf = slave->bsfs[i];
322 av_log(log_ctx, log_level, " stream:%d codec:%s type:%s",
323 i, avcodec_get_name(st->codec->codec_id),
324 av_get_media_type_string(st->codec->codec_type));
326 av_log(log_ctx, log_level, " bsfs:");
328 av_log(log_ctx, log_level, "%s%s",
329 bsf->filter->name, bsf->next ? "," : "");
333 av_log(log_ctx, log_level, "\n");
337 static int tee_write_header(AVFormatContext *avf)
339 TeeContext *tee = avf->priv_data;
340 unsigned nb_slaves = 0, i;
341 const char *filename = avf->filename;
342 char *slaves[MAX_SLAVES];
346 if (nb_slaves == MAX_SLAVES) {
347 av_log(avf, AV_LOG_ERROR, "Maximum %d slave muxers reached.\n",
349 ret = AVERROR_PATCHWELCOME;
352 if (!(slaves[nb_slaves++] = av_get_token(&filename, slave_delim))) {
353 ret = AVERROR(ENOMEM);
356 if (strspn(filename, slave_delim))
360 for (i = 0; i < nb_slaves; i++) {
361 if ((ret = open_slave(avf, slaves[i], &tee->slaves[i])) < 0)
363 log_slave(&tee->slaves[i], avf, AV_LOG_VERBOSE);
364 av_freep(&slaves[i]);
367 tee->nb_slaves = nb_slaves;
369 for (i = 0; i < avf->nb_streams; i++) {
371 for (j = 0; j < tee->nb_slaves; j++)
372 mapped += tee->slaves[j].stream_map[i] >= 0;
374 av_log(avf, AV_LOG_WARNING, "Input stream #%d is not mapped "
375 "to any slave.\n", i);
380 for (i = 0; i < nb_slaves; i++)
381 av_freep(&slaves[i]);
386 static int filter_packet(void *log_ctx, AVPacket *pkt,
387 AVFormatContext *fmt_ctx, AVBitStreamFilterContext *bsf_ctx)
389 AVCodecContext *enc_ctx = fmt_ctx->streams[pkt->stream_index]->codec;
393 AVPacket new_pkt = *pkt;
394 ret = av_bitstream_filter_filter(bsf_ctx, enc_ctx, NULL,
395 &new_pkt.data, &new_pkt.size,
396 pkt->data, pkt->size,
397 pkt->flags & AV_PKT_FLAG_KEY);
398 if (ret == 0 && new_pkt.data != pkt->data && new_pkt.destruct) {
399 if ((ret = av_copy_packet(&new_pkt, pkt)) < 0)
406 new_pkt.buf = av_buffer_create(new_pkt.data, new_pkt.size,
407 av_buffer_default_free, NULL, 0);
413 bsf_ctx = bsf_ctx->next;
417 av_log(log_ctx, AV_LOG_ERROR,
418 "Failed to filter bitstream with filter %s for stream %d in file '%s' with codec %s\n",
419 bsf_ctx->filter->name, pkt->stream_index, fmt_ctx->filename,
420 avcodec_get_name(enc_ctx->codec_id));
426 static int tee_write_trailer(AVFormatContext *avf)
428 TeeContext *tee = avf->priv_data;
429 AVFormatContext *avf2;
430 int ret_all = 0, ret;
433 for (i = 0; i < tee->nb_slaves; i++) {
434 avf2 = tee->slaves[i].avf;
435 if ((ret = av_write_trailer(avf2)) < 0)
438 if (!(avf2->oformat->flags & AVFMT_NOFILE)) {
439 if ((ret = avio_close(avf2->pb)) < 0)
449 static int tee_write_packet(AVFormatContext *avf, AVPacket *pkt)
451 TeeContext *tee = avf->priv_data;
452 AVFormatContext *avf2;
454 int ret_all = 0, ret;
459 for (i = 0; i < tee->nb_slaves; i++) {
460 avf2 = tee->slaves[i].avf;
461 s = pkt->stream_index;
462 s2 = tee->slaves[i].stream_map[s];
466 if ((ret = av_copy_packet(&pkt2, pkt)) < 0 ||
467 (ret = av_dup_packet(&pkt2))< 0)
472 tb = avf ->streams[s ]->time_base;
473 tb2 = avf2->streams[s2]->time_base;
474 pkt2.pts = av_rescale_q(pkt->pts, tb, tb2);
475 pkt2.dts = av_rescale_q(pkt->dts, tb, tb2);
476 pkt2.duration = av_rescale_q(pkt->duration, tb, tb2);
477 pkt2.stream_index = s2;
479 filter_packet(avf2, &pkt2, avf2, tee->slaves[i].bsfs[s2]);
480 if ((ret = av_interleaved_write_frame(avf2, &pkt2)) < 0)
487 AVOutputFormat ff_tee_muxer = {
489 .long_name = NULL_IF_CONFIG_SMALL("Multiple muxer tee"),
490 .priv_data_size = sizeof(TeeContext),
491 .write_header = tee_write_header,
492 .write_trailer = tee_write_trailer,
493 .write_packet = tee_write_packet,
494 .priv_class = &tee_muxer_class,
495 .flags = AVFMT_NOFILE,