avconv: distinguish between -ss 0 and -ss not being used
[libav.git] / avconv_filter.c
CommitLineData
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1/*
2 * avconv filter configuration
3 *
4 * This file is part of Libav.
5 *
6 * Libav is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * Libav 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 GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with Libav; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21#include "avconv.h"
22
23#include "libavfilter/avfilter.h"
fe2147e9 24
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25#include "libavresample/avresample.h"
26
fe2147e9 27#include "libavutil/avassert.h"
5c7db097 28#include "libavutil/avstring.h"
a903f8f0 29#include "libavutil/channel_layout.h"
5c7db097 30#include "libavutil/opt.h"
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31#include "libavutil/pixdesc.h"
32#include "libavutil/pixfmt.h"
33#include "libavutil/samplefmt.h"
34
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35/* Define a function for building a string containing a list of
36 * allowed formats. */
bee2d75b 37#define DEF_CHOOSE_FORMAT(type, var, supported_list, none, get_name) \
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38static char *choose_ ## var ## s(OutputStream *ost) \
39{ \
40 if (ost->st->codec->var != none) { \
41 get_name(ost->st->codec->var); \
42 return av_strdup(name); \
e760e1d4 43 } else if (ost->enc && ost->enc->supported_list) { \
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44 const type *p; \
45 AVIOContext *s = NULL; \
46 uint8_t *ret; \
47 int len; \
48 \
49 if (avio_open_dyn_buf(&s) < 0) \
5e3f9979 50 exit(1); \
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51 \
52 for (p = ost->enc->supported_list; *p != none; p++) { \
53 get_name(*p); \
bee2d75b 54 avio_printf(s, "%s|", name); \
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55 } \
56 len = avio_close_dyn_buf(s, &ret); \
57 ret[len - 1] = 0; \
58 return ret; \
59 } else \
60 return NULL; \
61}
62
716d413c 63DEF_CHOOSE_FORMAT(enum AVPixelFormat, pix_fmt, pix_fmts, AV_PIX_FMT_NONE,
bee2d75b 64 GET_PIX_FMT_NAME)
fe2147e9 65
fe2147e9 66DEF_CHOOSE_FORMAT(enum AVSampleFormat, sample_fmt, sample_fmts,
bee2d75b 67 AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME)
fe2147e9 68
fe2147e9 69DEF_CHOOSE_FORMAT(int, sample_rate, supported_samplerates, 0,
bee2d75b 70 GET_SAMPLE_RATE_NAME)
fe2147e9 71
fe2147e9 72DEF_CHOOSE_FORMAT(uint64_t, channel_layout, channel_layouts, 0,
bee2d75b 73 GET_CH_LAYOUT_NAME)
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74
75FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost)
76{
77 FilterGraph *fg = av_mallocz(sizeof(*fg));
78
79 if (!fg)
5e3f9979 80 exit(1);
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81 fg->index = nb_filtergraphs;
82
10bca661 83 GROW_ARRAY(fg->outputs, fg->nb_outputs);
fe2147e9 84 if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
5e3f9979 85 exit(1);
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86 fg->outputs[0]->ost = ost;
87 fg->outputs[0]->graph = fg;
88
89 ost->filter = fg->outputs[0];
90
10bca661 91 GROW_ARRAY(fg->inputs, fg->nb_inputs);
fe2147e9 92 if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
5e3f9979 93 exit(1);
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94 fg->inputs[0]->ist = ist;
95 fg->inputs[0]->graph = fg;
96
10bca661 97 GROW_ARRAY(ist->filters, ist->nb_filters);
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98 ist->filters[ist->nb_filters - 1] = fg->inputs[0];
99
10bca661 100 GROW_ARRAY(filtergraphs, nb_filtergraphs);
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101 filtergraphs[nb_filtergraphs - 1] = fg;
102
103 return fg;
104}
105
106static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
107{
108 InputStream *ist = NULL;
109 enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
110 int i;
111
112 // TODO: support other filter types
113 if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
114 av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
115 "currently.\n");
5e3f9979 116 exit(1);
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117 }
118
119 if (in->name) {
120 AVFormatContext *s;
121 AVStream *st = NULL;
122 char *p;
123 int file_idx = strtol(in->name, &p, 0);
124
125 if (file_idx < 0 || file_idx >= nb_input_files) {
126 av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtegraph description %s.\n",
127 file_idx, fg->graph_desc);
5e3f9979 128 exit(1);
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129 }
130 s = input_files[file_idx]->ctx;
131
132 for (i = 0; i < s->nb_streams; i++) {
133 if (s->streams[i]->codec->codec_type != type)
134 continue;
135 if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
136 st = s->streams[i];
137 break;
138 }
139 }
140 if (!st) {
141 av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
142 "matches no streams.\n", p, fg->graph_desc);
5e3f9979 143 exit(1);
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144 }
145 ist = input_streams[input_files[file_idx]->ist_index + st->index];
146 } else {
147 /* find the first unused stream of corresponding type */
148 for (i = 0; i < nb_input_streams; i++) {
149 ist = input_streams[i];
150 if (ist->st->codec->codec_type == type && ist->discard)
151 break;
152 }
153 if (i == nb_input_streams) {
154 av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
155 "unlabeled input pad %d on filter %s", in->pad_idx,
156 in->filter_ctx->name);
5e3f9979 157 exit(1);
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158 }
159 }
160 av_assert0(ist);
161
162 ist->discard = 0;
163 ist->decoding_needed = 1;
164 ist->st->discard = AVDISCARD_NONE;
165
10bca661 166 GROW_ARRAY(fg->inputs, fg->nb_inputs);
fe2147e9 167 if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
5e3f9979 168 exit(1);
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169 fg->inputs[fg->nb_inputs - 1]->ist = ist;
170 fg->inputs[fg->nb_inputs - 1]->graph = fg;
171
10bca661 172 GROW_ARRAY(ist->filters, ist->nb_filters);
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173 ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
174}
175
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176static int insert_trim(OutputStream *ost, AVFilterContext **last_filter, int *pad_idx)
177{
178 OutputFile *of = output_files[ost->file_index];
179 AVFilterGraph *graph = (*last_filter)->graph;
180 AVFilterContext *ctx;
181 const AVFilter *trim;
182 const char *name = ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO ? "trim" : "atrim";
183 char filter_name[128];
184 int ret = 0;
185
56ee3f9d 186 if (of->recording_time == INT64_MAX && of->start_time == AV_NOPTS_VALUE)
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187 return 0;
188
189 trim = avfilter_get_by_name(name);
190 if (!trim) {
191 av_log(NULL, AV_LOG_ERROR, "%s filter not present, cannot limit "
192 "recording time.\n", name);
193 return AVERROR_FILTER_NOT_FOUND;
194 }
195
196 snprintf(filter_name, sizeof(filter_name), "%s for output stream %d:%d",
197 name, ost->file_index, ost->index);
198 ctx = avfilter_graph_alloc_filter(graph, trim, filter_name);
199 if (!ctx)
200 return AVERROR(ENOMEM);
201
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202 if (of->recording_time != INT64_MAX) {
203 ret = av_opt_set_double(ctx, "duration", (double)of->recording_time / 1e6,
204 AV_OPT_SEARCH_CHILDREN);
205 }
56ee3f9d 206 if (ret >= 0 && of->start_time != AV_NOPTS_VALUE) {
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207 ret = av_opt_set_double(ctx, "start", (double)of->start_time / 1e6,
208 AV_OPT_SEARCH_CHILDREN);
209 }
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210 if (ret < 0) {
211 av_log(ctx, AV_LOG_ERROR, "Error configuring the %s filter", name);
212 return ret;
213 }
214
215 ret = avfilter_init_str(ctx, NULL);
216 if (ret < 0)
217 return ret;
218
219 ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
220 if (ret < 0)
221 return ret;
222
223 *last_filter = ctx;
224 *pad_idx = 0;
225 return 0;
226}
227
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228static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
229{
230 char *pix_fmts;
231 OutputStream *ost = ofilter->ost;
232 AVCodecContext *codec = ost->st->codec;
233 AVFilterContext *last_filter = out->filter_ctx;
234 int pad_idx = out->pad_idx;
235 int ret;
236 char name[255];
237
238 snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
239 ret = avfilter_graph_create_filter(&ofilter->filter,
240 avfilter_get_by_name("buffersink"),
58dee6e6 241 name, NULL, NULL, fg->graph);
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242 if (ret < 0)
243 return ret;
244
245 if (codec->width || codec->height) {
246 char args[255];
247 AVFilterContext *filter;
248
72fbc968 249 snprintf(args, sizeof(args), "%d:%d:0x%X",
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250 codec->width,
251 codec->height,
252 (unsigned)ost->sws_flags);
253 snprintf(name, sizeof(name), "scaler for output stream %d:%d",
254 ost->file_index, ost->index);
255 if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
256 name, args, NULL, fg->graph)) < 0)
257 return ret;
258 if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
259 return ret;
260
261 last_filter = filter;
262 pad_idx = 0;
263 }
264
265 if ((pix_fmts = choose_pix_fmts(ost))) {
266 AVFilterContext *filter;
267 snprintf(name, sizeof(name), "pixel format for output stream %d:%d",
268 ost->file_index, ost->index);
269 if ((ret = avfilter_graph_create_filter(&filter,
270 avfilter_get_by_name("format"),
271 "format", pix_fmts, NULL,
272 fg->graph)) < 0)
273 return ret;
274 if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
275 return ret;
276
277 last_filter = filter;
278 pad_idx = 0;
279 av_freep(&pix_fmts);
280 }
281
282 if (ost->frame_rate.num) {
283 AVFilterContext *fps;
284 char args[255];
285
286 snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
287 ost->frame_rate.den);
288 snprintf(name, sizeof(name), "fps for output stream %d:%d",
289 ost->file_index, ost->index);
290 ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
291 name, args, NULL, fg->graph);
292 if (ret < 0)
293 return ret;
294
295 ret = avfilter_link(last_filter, pad_idx, fps, 0);
296 if (ret < 0)
297 return ret;
298 last_filter = fps;
299 pad_idx = 0;
300 }
301
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302 ret = insert_trim(ost, &last_filter, &pad_idx);
303 if (ret < 0)
304 return ret;
305
306
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307 if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
308 return ret;
309
310 return 0;
311}
312
313static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
314{
315 OutputStream *ost = ofilter->ost;
316 AVCodecContext *codec = ost->st->codec;
317 AVFilterContext *last_filter = out->filter_ctx;
318 int pad_idx = out->pad_idx;
319 char *sample_fmts, *sample_rates, *channel_layouts;
320 char name[255];
321 int ret;
322
323
324 snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
325 ret = avfilter_graph_create_filter(&ofilter->filter,
326 avfilter_get_by_name("abuffersink"),
327 name, NULL, NULL, fg->graph);
328 if (ret < 0)
329 return ret;
330
331 if (codec->channels && !codec->channel_layout)
332 codec->channel_layout = av_get_default_channel_layout(codec->channels);
333
334 sample_fmts = choose_sample_fmts(ost);
335 sample_rates = choose_sample_rates(ost);
336 channel_layouts = choose_channel_layouts(ost);
337 if (sample_fmts || sample_rates || channel_layouts) {
338 AVFilterContext *format;
339 char args[256];
340 int len = 0;
341
342 if (sample_fmts)
343 len += snprintf(args + len, sizeof(args) - len, "sample_fmts=%s:",
344 sample_fmts);
345 if (sample_rates)
346 len += snprintf(args + len, sizeof(args) - len, "sample_rates=%s:",
347 sample_rates);
348 if (channel_layouts)
349 len += snprintf(args + len, sizeof(args) - len, "channel_layouts=%s:",
350 channel_layouts);
351 args[len - 1] = 0;
352
353 av_freep(&sample_fmts);
354 av_freep(&sample_rates);
355 av_freep(&channel_layouts);
356
357 snprintf(name, sizeof(name), "audio format for output stream %d:%d",
358 ost->file_index, ost->index);
359 ret = avfilter_graph_create_filter(&format,
360 avfilter_get_by_name("aformat"),
361 name, args, NULL, fg->graph);
362 if (ret < 0)
363 return ret;
364
365 ret = avfilter_link(last_filter, pad_idx, format, 0);
366 if (ret < 0)
367 return ret;
368
369 last_filter = format;
370 pad_idx = 0;
371 }
372
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373 ret = insert_trim(ost, &last_filter, &pad_idx);
374 if (ret < 0)
375 return ret;
376
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377 if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
378 return ret;
379
380 return 0;
381}
382
383#define DESCRIBE_FILTER_LINK(f, inout, in) \
384{ \
385 AVFilterContext *ctx = inout->filter_ctx; \
386 AVFilterPad *pads = in ? ctx->input_pads : ctx->output_pads; \
06cd4c5a 387 int nb_pads = in ? ctx->nb_inputs : ctx->nb_outputs; \
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388 AVIOContext *pb; \
389 \
390 if (avio_open_dyn_buf(&pb) < 0) \
5e3f9979 391 exit(1); \
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392 \
393 avio_printf(pb, "%s", ctx->filter->name); \
394 if (nb_pads > 1) \
395 avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));\
396 avio_w8(pb, 0); \
397 avio_close_dyn_buf(pb, &f->name); \
398}
399
400int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
401{
402 av_freep(&ofilter->name);
403 DESCRIBE_FILTER_LINK(ofilter, out, 0);
404
405 switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
406 case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
407 case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
408 default: av_assert0(0);
409 }
410}
411
412static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
413 AVFilterInOut *in)
414{
2e661f26 415 AVFilterContext *last_filter;
51fc88e7 416 const AVFilter *buffer_filt = avfilter_get_by_name("buffer");
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417 InputStream *ist = ifilter->ist;
418 AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
419 ist->st->time_base;
420 AVRational sar;
421 char args[255], name[255];
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422 int ret;
423
424 sar = ist->st->sample_aspect_ratio.num ?
425 ist->st->sample_aspect_ratio :
426 ist->st->codec->sample_aspect_ratio;
427 snprintf(args, sizeof(args), "%d:%d:%d:%d:%d:%d:%d", ist->st->codec->width,
428 ist->st->codec->height, ist->st->codec->pix_fmt,
429 tb.num, tb.den, sar.num, sar.den);
430 snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
431 ist->file_index, ist->st->index);
432
51fc88e7 433 if ((ret = avfilter_graph_create_filter(&ifilter->filter, buffer_filt, name,
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434 args, NULL, fg->graph)) < 0)
435 return ret;
2e661f26 436 last_filter = ifilter->filter;
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437
438 if (ist->framerate.num) {
439 AVFilterContext *setpts;
440
441 snprintf(name, sizeof(name), "force CFR for input from stream %d:%d",
442 ist->file_index, ist->st->index);
443 if ((ret = avfilter_graph_create_filter(&setpts,
444 avfilter_get_by_name("setpts"),
445 name, "N", NULL,
446 fg->graph)) < 0)
447 return ret;
448
2e661f26 449 if ((ret = avfilter_link(last_filter, 0, setpts, 0)) < 0)
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450 return ret;
451
2e661f26 452 last_filter = setpts;
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453 }
454
2e661f26 455 if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
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456 return ret;
457 return 0;
458}
459
460static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
461 AVFilterInOut *in)
462{
2e661f26 463 AVFilterContext *last_filter;
51fc88e7 464 const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer");
fe2147e9 465 InputStream *ist = ifilter->ist;
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466 char args[255], name[255];
467 int ret;
468
469 snprintf(args, sizeof(args), "time_base=%d/%d:sample_rate=%d:sample_fmt=%s"
470 ":channel_layout=0x%"PRIx64,
471 1, ist->st->codec->sample_rate,
472 ist->st->codec->sample_rate,
473 av_get_sample_fmt_name(ist->st->codec->sample_fmt),
474 ist->st->codec->channel_layout);
475 snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
476 ist->file_index, ist->st->index);
477
51fc88e7 478 if ((ret = avfilter_graph_create_filter(&ifilter->filter, abuffer_filt,
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479 name, args, NULL,
480 fg->graph)) < 0)
481 return ret;
2e661f26 482 last_filter = ifilter->filter;
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483
484 if (audio_sync_method > 0) {
485 AVFilterContext *async;
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486 int len = 0;
487
488 av_log(NULL, AV_LOG_WARNING, "-async has been deprecated. Used the "
489 "asyncts audio filter instead.\n");
490
491 if (audio_sync_method > 1)
492 len += snprintf(args + len, sizeof(args) - len, "compensate=1:"
493 "max_comp=%d:", audio_sync_method);
494 snprintf(args + len, sizeof(args) - len, "min_delta=%f",
495 audio_drift_threshold);
496
497 snprintf(name, sizeof(name), "graph %d audio sync for input stream %d:%d",
498 fg->index, ist->file_index, ist->st->index);
499 ret = avfilter_graph_create_filter(&async,
500 avfilter_get_by_name("asyncts"),
501 name, args, NULL, fg->graph);
502 if (ret < 0)
503 return ret;
504
2e661f26 505 ret = avfilter_link(last_filter, 0, async, 0);
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506 if (ret < 0)
507 return ret;
508
2e661f26 509 last_filter = async;
fe2147e9 510 }
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511 if (audio_volume != 256) {
512 AVFilterContext *volume;
513
514 av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume "
515 "audio filter instead.\n");
516
517 snprintf(args, sizeof(args), "volume=%f", audio_volume / 256.0);
518
519 snprintf(name, sizeof(name), "graph %d volume for input stream %d:%d",
520 fg->index, ist->file_index, ist->st->index);
521 ret = avfilter_graph_create_filter(&volume,
522 avfilter_get_by_name("volume"),
523 name, args, NULL, fg->graph);
524 if (ret < 0)
525 return ret;
526
2e661f26 527 ret = avfilter_link(last_filter, 0, volume, 0);
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528 if (ret < 0)
529 return ret;
530
2e661f26 531 last_filter = volume;
9a71d362 532 }
2e661f26 533 if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
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534 return ret;
535
536 return 0;
537}
538
539static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
540 AVFilterInOut *in)
541{
542 av_freep(&ifilter->name);
543 DESCRIBE_FILTER_LINK(ifilter, in, 1);
544
545 switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
546 case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
547 case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
548 default: av_assert0(0);
549 }
550}
551
552int configure_filtergraph(FilterGraph *fg)
553{
554 AVFilterInOut *inputs, *outputs, *cur;
555 int ret, i, init = !fg->graph, simple = !fg->graph_desc;
556 const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
557 fg->graph_desc;
558
559 avfilter_graph_free(&fg->graph);
560 if (!(fg->graph = avfilter_graph_alloc()))
561 return AVERROR(ENOMEM);
562
563 if (simple) {
564 OutputStream *ost = fg->outputs[0]->ost;
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565 char args[512];
566 AVDictionaryEntry *e = NULL;
5c7db097 567
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568 snprintf(args, sizeof(args), "flags=0x%X", (unsigned)ost->sws_flags);
569 fg->graph->scale_sws_opts = av_strdup(args);
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570
571 args[0] = '\0';
572 while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e,
573 AV_DICT_IGNORE_SUFFIX))) {
574 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
575 }
576 if (strlen(args))
577 args[strlen(args) - 1] = '\0';
578 fg->graph->resample_lavr_opts = av_strdup(args);
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579 }
580
581 if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
582 return ret;
583
584 if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
585 av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' does not have "
586 "exactly one input and output.\n", graph_desc);
587 return AVERROR(EINVAL);
588 }
589
590 for (cur = inputs; !simple && init && cur; cur = cur->next)
591 init_input_filter(fg, cur);
592
593 for (cur = inputs, i = 0; cur; cur = cur->next, i++)
594 if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0)
595 return ret;
596 avfilter_inout_free(&inputs);
597
598 if (!init || simple) {
599 /* we already know the mappings between lavfi outputs and output streams,
600 * so we can finish the setup */
601 for (cur = outputs, i = 0; cur; cur = cur->next, i++)
602 configure_output_filter(fg, fg->outputs[i], cur);
603 avfilter_inout_free(&outputs);
604
605 if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
606 return ret;
607 } else {
608 /* wait until output mappings are processed */
609 for (cur = outputs; cur;) {
10bca661 610 GROW_ARRAY(fg->outputs, fg->nb_outputs);
fe2147e9 611 if (!(fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]))))
5e3f9979 612 exit(1);
fe2147e9
AK
613 fg->outputs[fg->nb_outputs - 1]->graph = fg;
614 fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
615 cur = cur->next;
616 fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
617 }
618 }
619
620 return 0;
621}
622
623int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
624{
625 int i;
626 for (i = 0; i < fg->nb_inputs; i++)
627 if (fg->inputs[i]->ist == ist)
628 return 1;
629 return 0;
630}
631