Imported Debian version 2.5.2~trusty
[deb_ffmpeg.git] / ffmpeg / libavformat / tee.c
... / ...
CommitLineData
1/*
2 * Tee pseudo-muxer
3 * Copyright (c) 2012 Nicolas George
4 *
5 * This file is part of FFmpeg.
6 *
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.
11 *
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.
16 *
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
20 */
21
22
23#include "libavutil/avutil.h"
24#include "libavutil/avstring.h"
25#include "libavutil/opt.h"
26#include "avformat.h"
27
28#define MAX_SLAVES 16
29
30typedef struct {
31 AVFormatContext *avf;
32 AVBitStreamFilterContext **bsfs; ///< bitstream filters per stream
33
34 /** map from input to output streams indexes,
35 * disabled output streams are set to -1 */
36 int *stream_map;
37} TeeSlave;
38
39typedef struct TeeContext {
40 const AVClass *class;
41 unsigned nb_slaves;
42 TeeSlave slaves[MAX_SLAVES];
43} TeeContext;
44
45static const char *const slave_delim = "|";
46static const char *const slave_opt_open = "[";
47static const char *const slave_opt_close = "]";
48static const char *const slave_opt_delim = ":]"; /* must have the close too */
49static const char *const slave_bsfs_spec_sep = "/";
50
51static const AVClass tee_muxer_class = {
52 .class_name = "Tee muxer",
53 .item_name = av_default_item_name,
54 .version = LIBAVUTIL_VERSION_INT,
55};
56
57static int parse_slave_options(void *log, char *slave,
58 AVDictionary **options, char **filename)
59{
60 const char *p;
61 char *key, *val;
62 int ret;
63
64 if (!strspn(slave, slave_opt_open)) {
65 *filename = slave;
66 return 0;
67 }
68 p = slave + 1;
69 if (strspn(p, slave_opt_close)) {
70 *filename = (char *)p + 1;
71 return 0;
72 }
73 while (1) {
74 ret = av_opt_get_key_value(&p, "=", slave_opt_delim, 0, &key, &val);
75 if (ret < 0) {
76 av_log(log, AV_LOG_ERROR, "No option found near \"%s\"\n", p);
77 goto fail;
78 }
79 ret = av_dict_set(options, key, val,
80 AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL);
81 if (ret < 0)
82 goto fail;
83 if (strspn(p, slave_opt_close))
84 break;
85 p++;
86 }
87 *filename = (char *)p + 1;
88 return 0;
89
90fail:
91 av_dict_free(options);
92 return ret;
93}
94
95/**
96 * Parse list of bitstream filters and add them to the list of filters
97 * pointed to by bsfs.
98 *
99 * The list must be specified in the form:
100 * BSFS ::= BSF[,BSFS]
101 */
102static int parse_bsfs(void *log_ctx, const char *bsfs_spec,
103 AVBitStreamFilterContext **bsfs)
104{
105 char *bsf_name, *buf, *dup, *saveptr;
106 int ret = 0;
107
108 if (!(dup = buf = av_strdup(bsfs_spec)))
109 return AVERROR(ENOMEM);
110
111 while (bsf_name = av_strtok(buf, ",", &saveptr)) {
112 AVBitStreamFilterContext *bsf = av_bitstream_filter_init(bsf_name);
113
114 if (!bsf) {
115 av_log(log_ctx, AV_LOG_ERROR,
116 "Cannot initialize bitstream filter with name '%s', "
117 "unknown filter or internal error happened\n",
118 bsf_name);
119 ret = AVERROR_UNKNOWN;
120 goto end;
121 }
122
123 /* append bsf context to the list of bsf contexts */
124 *bsfs = bsf;
125 bsfs = &bsf->next;
126
127 buf = NULL;
128 }
129
130end:
131 av_free(dup);
132 return ret;
133}
134
135static int open_slave(AVFormatContext *avf, char *slave, TeeSlave *tee_slave)
136{
137 int i, ret;
138 AVDictionary *options = NULL;
139 AVDictionaryEntry *entry;
140 char *filename;
141 char *format = NULL, *select = NULL;
142 AVFormatContext *avf2 = NULL;
143 AVStream *st, *st2;
144 int stream_count;
145
146 if ((ret = parse_slave_options(avf, slave, &options, &filename)) < 0)
147 return ret;
148
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); \
154 } \
155 } while (0)
156
157 STEAL_OPTION("f", format);
158 STEAL_OPTION("select", select);
159
160 ret = avformat_alloc_output_context2(&avf2, NULL, format, filename);
161 if (ret < 0)
162 goto end;
163 av_dict_copy(&avf2->metadata, avf->metadata, 0);
164
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);
168 goto end;
169 }
170
171 stream_count = 0;
172 for (i = 0; i < avf->nb_streams; i++) {
173 st = avf->streams[i];
174 if (select) {
175 ret = avformat_match_stream_specifier(avf, avf->streams[i], select);
176 if (ret < 0) {
177 av_log(avf, AV_LOG_ERROR,
178 "Invalid stream specifier '%s' for output '%s'\n",
179 select, slave);
180 goto end;
181 }
182
183 if (ret == 0) { /* no match */
184 tee_slave->stream_map[i] = -1;
185 continue;
186 }
187 }
188 tee_slave->stream_map[i] = stream_count++;
189
190 if (!(st2 = avformat_new_stream(avf2, NULL))) {
191 ret = AVERROR(ENOMEM);
192 goto end;
193 }
194 st2->id = st->id;
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)
205 goto end;
206 }
207
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));
212 goto end;
213 }
214 }
215
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));
219 goto end;
220 }
221
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);
226 goto end;
227 }
228
229 entry = NULL;
230 while (entry = av_dict_get(options, "bsfs", NULL, AV_DICT_IGNORE_SUFFIX)) {
231 const char *spec = entry->key + strlen("bsfs");
232 if (*spec) {
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);
238 }
239 spec++; /* consume separator */
240 }
241
242 for (i = 0; i < avf2->nb_streams; i++) {
243 ret = avformat_match_stream_specifier(avf2, avf2->streams[i], spec);
244 if (ret < 0) {
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);
248 goto end;
249 }
250
251 if (ret > 0) {
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);
258 continue;
259 }
260 ret = parse_bsfs(avf, entry->value, &tee_slave->bsfs[i]);
261 if (ret < 0) {
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);
265 goto end;
266 }
267 }
268 }
269
270 av_dict_set(&options, entry->key, NULL, 0);
271 }
272
273 if (options) {
274 entry = NULL;
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;
278 goto end;
279 }
280
281end:
282 av_free(format);
283 av_free(select);
284 av_dict_free(&options);
285 return ret;
286}
287
288static void close_slaves(AVFormatContext *avf)
289{
290 TeeContext *tee = avf->priv_data;
291 AVFormatContext *avf2;
292 unsigned i, j;
293
294 for (i = 0; i < tee->nb_slaves; i++) {
295 avf2 = tee->slaves[i].avf;
296
297 for (j = 0; j < avf2->nb_streams; j++) {
298 AVBitStreamFilterContext *bsf_next, *bsf = tee->slaves[i].bsfs[j];
299 while (bsf) {
300 bsf_next = bsf->next;
301 av_bitstream_filter_close(bsf);
302 bsf = bsf_next;
303 }
304 }
305 av_freep(&tee->slaves[i].stream_map);
306 av_freep(&tee->slaves[i].bsfs);
307
308 avio_close(avf2->pb);
309 avf2->pb = NULL;
310 avformat_free_context(avf2);
311 tee->slaves[i].avf = NULL;
312 }
313}
314
315static void log_slave(TeeSlave *slave, void *log_ctx, int log_level)
316{
317 int i;
318 av_log(log_ctx, log_level, "filename:'%s' format:%s\n",
319 slave->avf->filename, slave->avf->oformat->name);
320 for (i = 0; i < slave->avf->nb_streams; i++) {
321 AVStream *st = slave->avf->streams[i];
322 AVBitStreamFilterContext *bsf = slave->bsfs[i];
323
324 av_log(log_ctx, log_level, " stream:%d codec:%s type:%s",
325 i, avcodec_get_name(st->codec->codec_id),
326 av_get_media_type_string(st->codec->codec_type));
327 if (bsf) {
328 av_log(log_ctx, log_level, " bsfs:");
329 while (bsf) {
330 av_log(log_ctx, log_level, "%s%s",
331 bsf->filter->name, bsf->next ? "," : "");
332 bsf = bsf->next;
333 }
334 }
335 av_log(log_ctx, log_level, "\n");
336 }
337}
338
339static int tee_write_header(AVFormatContext *avf)
340{
341 TeeContext *tee = avf->priv_data;
342 unsigned nb_slaves = 0, i;
343 const char *filename = avf->filename;
344 char *slaves[MAX_SLAVES];
345 int ret;
346
347 while (*filename) {
348 if (nb_slaves == MAX_SLAVES) {
349 av_log(avf, AV_LOG_ERROR, "Maximum %d slave muxers reached.\n",
350 MAX_SLAVES);
351 ret = AVERROR_PATCHWELCOME;
352 goto fail;
353 }
354 if (!(slaves[nb_slaves++] = av_get_token(&filename, slave_delim))) {
355 ret = AVERROR(ENOMEM);
356 goto fail;
357 }
358 if (strspn(filename, slave_delim))
359 filename++;
360 }
361
362 for (i = 0; i < nb_slaves; i++) {
363 if ((ret = open_slave(avf, slaves[i], &tee->slaves[i])) < 0)
364 goto fail;
365 log_slave(&tee->slaves[i], avf, AV_LOG_VERBOSE);
366 av_freep(&slaves[i]);
367 }
368
369 tee->nb_slaves = nb_slaves;
370
371 for (i = 0; i < avf->nb_streams; i++) {
372 int j, mapped = 0;
373 for (j = 0; j < tee->nb_slaves; j++)
374 mapped += tee->slaves[j].stream_map[i] >= 0;
375 if (!mapped)
376 av_log(avf, AV_LOG_WARNING, "Input stream #%d is not mapped "
377 "to any slave.\n", i);
378 }
379 return 0;
380
381fail:
382 for (i = 0; i < nb_slaves; i++)
383 av_freep(&slaves[i]);
384 close_slaves(avf);
385 return ret;
386}
387
388static int filter_packet(void *log_ctx, AVPacket *pkt,
389 AVFormatContext *fmt_ctx, AVBitStreamFilterContext *bsf_ctx)
390{
391 AVCodecContext *enc_ctx = fmt_ctx->streams[pkt->stream_index]->codec;
392 int ret = 0;
393
394 while (bsf_ctx) {
395 AVPacket new_pkt = *pkt;
396 ret = av_bitstream_filter_filter(bsf_ctx, enc_ctx, NULL,
397 &new_pkt.data, &new_pkt.size,
398 pkt->data, pkt->size,
399 pkt->flags & AV_PKT_FLAG_KEY);
400 if (ret == 0 && new_pkt.data != pkt->data && new_pkt.destruct) {
401 if ((ret = av_copy_packet(&new_pkt, pkt)) < 0)
402 break;
403 ret = 1;
404 }
405
406 if (ret > 0) {
407 av_free_packet(pkt);
408 new_pkt.buf = av_buffer_create(new_pkt.data, new_pkt.size,
409 av_buffer_default_free, NULL, 0);
410 if (!new_pkt.buf)
411 break;
412 }
413 if (ret < 0) {
414 av_log(log_ctx, AV_LOG_ERROR,
415 "Failed to filter bitstream with filter %s for stream %d in file '%s' with codec %s\n",
416 bsf_ctx->filter->name, pkt->stream_index, fmt_ctx->filename,
417 avcodec_get_name(enc_ctx->codec_id));
418 }
419 *pkt = new_pkt;
420
421 bsf_ctx = bsf_ctx->next;
422 }
423
424 return ret;
425}
426
427static int tee_write_trailer(AVFormatContext *avf)
428{
429 TeeContext *tee = avf->priv_data;
430 AVFormatContext *avf2;
431 int ret_all = 0, ret;
432 unsigned i;
433
434 for (i = 0; i < tee->nb_slaves; i++) {
435 avf2 = tee->slaves[i].avf;
436 if ((ret = av_write_trailer(avf2)) < 0)
437 if (!ret_all)
438 ret_all = ret;
439 if (!(avf2->oformat->flags & AVFMT_NOFILE)) {
440 if ((ret = avio_close(avf2->pb)) < 0)
441 if (!ret_all)
442 ret_all = ret;
443 avf2->pb = NULL;
444 }
445 }
446 close_slaves(avf);
447 return ret_all;
448}
449
450static int tee_write_packet(AVFormatContext *avf, AVPacket *pkt)
451{
452 TeeContext *tee = avf->priv_data;
453 AVFormatContext *avf2;
454 AVPacket pkt2;
455 int ret_all = 0, ret;
456 unsigned i, s;
457 int s2;
458 AVRational tb, tb2;
459
460 for (i = 0; i < tee->nb_slaves; i++) {
461 avf2 = tee->slaves[i].avf;
462 s = pkt->stream_index;
463 s2 = tee->slaves[i].stream_map[s];
464 if (s2 < 0)
465 continue;
466
467 if ((ret = av_copy_packet(&pkt2, pkt)) < 0 ||
468 (ret = av_dup_packet(&pkt2))< 0)
469 if (!ret_all) {
470 ret_all = ret;
471 continue;
472 }
473 tb = avf ->streams[s ]->time_base;
474 tb2 = avf2->streams[s2]->time_base;
475 pkt2.pts = av_rescale_q(pkt->pts, tb, tb2);
476 pkt2.dts = av_rescale_q(pkt->dts, tb, tb2);
477 pkt2.duration = av_rescale_q(pkt->duration, tb, tb2);
478 pkt2.stream_index = s2;
479
480 filter_packet(avf2, &pkt2, avf2, tee->slaves[i].bsfs[s2]);
481 if ((ret = av_interleaved_write_frame(avf2, &pkt2)) < 0)
482 if (!ret_all)
483 ret_all = ret;
484 }
485 return ret_all;
486}
487
488AVOutputFormat ff_tee_muxer = {
489 .name = "tee",
490 .long_name = NULL_IF_CONFIG_SMALL("Multiple muxer tee"),
491 .priv_data_size = sizeof(TeeContext),
492 .write_header = tee_write_header,
493 .write_trailer = tee_write_trailer,
494 .write_packet = tee_write_packet,
495 .priv_class = &tee_muxer_class,
496 .flags = AVFMT_NOFILE,
497};