avprobe: Remove a pointless check
[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
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21#include <stdint.h>
22
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23#include "avconv.h"
24
25#include "libavfilter/avfilter.h"
fe2147e9 26
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27#include "libavresample/avresample.h"
28
fe2147e9 29#include "libavutil/avassert.h"
5c7db097 30#include "libavutil/avstring.h"
a903f8f0 31#include "libavutil/channel_layout.h"
5c7db097 32#include "libavutil/opt.h"
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33#include "libavutil/pixdesc.h"
34#include "libavutil/pixfmt.h"
35#include "libavutil/samplefmt.h"
36
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37/* Define a function for building a string containing a list of
38 * allowed formats. */
bee2d75b 39#define DEF_CHOOSE_FORMAT(type, var, supported_list, none, get_name) \
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40static char *choose_ ## var ## s(OutputStream *ost) \
41{ \
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42 if (ost->enc_ctx->var != none) { \
43 get_name(ost->enc_ctx->var); \
fe2147e9 44 return av_strdup(name); \
e760e1d4 45 } else if (ost->enc && ost->enc->supported_list) { \
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46 const type *p; \
47 AVIOContext *s = NULL; \
48 uint8_t *ret; \
49 int len; \
50 \
51 if (avio_open_dyn_buf(&s) < 0) \
5e3f9979 52 exit(1); \
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53 \
54 for (p = ost->enc->supported_list; *p != none; p++) { \
55 get_name(*p); \
bee2d75b 56 avio_printf(s, "%s|", name); \
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57 } \
58 len = avio_close_dyn_buf(s, &ret); \
59 ret[len - 1] = 0; \
60 return ret; \
61 } else \
62 return NULL; \
63}
64
716d413c 65DEF_CHOOSE_FORMAT(enum AVPixelFormat, pix_fmt, pix_fmts, AV_PIX_FMT_NONE,
bee2d75b 66 GET_PIX_FMT_NAME)
fe2147e9 67
fe2147e9 68DEF_CHOOSE_FORMAT(enum AVSampleFormat, sample_fmt, sample_fmts,
bee2d75b 69 AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME)
fe2147e9 70
fe2147e9 71DEF_CHOOSE_FORMAT(int, sample_rate, supported_samplerates, 0,
bee2d75b 72 GET_SAMPLE_RATE_NAME)
fe2147e9 73
fe2147e9 74DEF_CHOOSE_FORMAT(uint64_t, channel_layout, channel_layouts, 0,
bee2d75b 75 GET_CH_LAYOUT_NAME)
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76
77FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost)
78{
79 FilterGraph *fg = av_mallocz(sizeof(*fg));
80
81 if (!fg)
5e3f9979 82 exit(1);
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83 fg->index = nb_filtergraphs;
84
10bca661 85 GROW_ARRAY(fg->outputs, fg->nb_outputs);
fe2147e9 86 if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
5e3f9979 87 exit(1);
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88 fg->outputs[0]->ost = ost;
89 fg->outputs[0]->graph = fg;
90
91 ost->filter = fg->outputs[0];
92
10bca661 93 GROW_ARRAY(fg->inputs, fg->nb_inputs);
fe2147e9 94 if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
5e3f9979 95 exit(1);
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96 fg->inputs[0]->ist = ist;
97 fg->inputs[0]->graph = fg;
98
10bca661 99 GROW_ARRAY(ist->filters, ist->nb_filters);
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100 ist->filters[ist->nb_filters - 1] = fg->inputs[0];
101
10bca661 102 GROW_ARRAY(filtergraphs, nb_filtergraphs);
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103 filtergraphs[nb_filtergraphs - 1] = fg;
104
105 return fg;
106}
107
108static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
109{
110 InputStream *ist = NULL;
111 enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
112 int i;
113
114 // TODO: support other filter types
115 if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
116 av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
117 "currently.\n");
5e3f9979 118 exit(1);
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119 }
120
121 if (in->name) {
122 AVFormatContext *s;
123 AVStream *st = NULL;
124 char *p;
125 int file_idx = strtol(in->name, &p, 0);
126
127 if (file_idx < 0 || file_idx >= nb_input_files) {
128 av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtegraph description %s.\n",
129 file_idx, fg->graph_desc);
5e3f9979 130 exit(1);
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131 }
132 s = input_files[file_idx]->ctx;
133
134 for (i = 0; i < s->nb_streams; i++) {
135 if (s->streams[i]->codec->codec_type != type)
136 continue;
137 if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
138 st = s->streams[i];
139 break;
140 }
141 }
142 if (!st) {
143 av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
144 "matches no streams.\n", p, fg->graph_desc);
5e3f9979 145 exit(1);
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146 }
147 ist = input_streams[input_files[file_idx]->ist_index + st->index];
148 } else {
149 /* find the first unused stream of corresponding type */
150 for (i = 0; i < nb_input_streams; i++) {
151 ist = input_streams[i];
41776ba9 152 if (ist->dec_ctx->codec_type == type && ist->discard)
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153 break;
154 }
155 if (i == nb_input_streams) {
156 av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
d28fc7b2 157 "unlabeled input pad %d on filter %s\n", in->pad_idx,
fe2147e9 158 in->filter_ctx->name);
5e3f9979 159 exit(1);
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160 }
161 }
162 av_assert0(ist);
163
164 ist->discard = 0;
165 ist->decoding_needed = 1;
166 ist->st->discard = AVDISCARD_NONE;
167
10bca661 168 GROW_ARRAY(fg->inputs, fg->nb_inputs);
fe2147e9 169 if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
5e3f9979 170 exit(1);
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171 fg->inputs[fg->nb_inputs - 1]->ist = ist;
172 fg->inputs[fg->nb_inputs - 1]->graph = fg;
173
10bca661 174 GROW_ARRAY(ist->filters, ist->nb_filters);
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175 ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
176}
177
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178static int insert_trim(int64_t start_time, int64_t duration,
179 AVFilterContext **last_filter, int *pad_idx,
180 const char *filter_name)
a83c0da5 181{
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182 AVFilterGraph *graph = (*last_filter)->graph;
183 AVFilterContext *ctx;
184 const AVFilter *trim;
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185 enum AVMediaType type = avfilter_pad_get_type((*last_filter)->output_pads, *pad_idx);
186 const char *name = (type == AVMEDIA_TYPE_VIDEO) ? "trim" : "atrim";
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187 int ret = 0;
188
811bd078 189 if (duration == INT64_MAX && start_time == AV_NOPTS_VALUE)
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190 return 0;
191
192 trim = avfilter_get_by_name(name);
193 if (!trim) {
194 av_log(NULL, AV_LOG_ERROR, "%s filter not present, cannot limit "
195 "recording time.\n", name);
196 return AVERROR_FILTER_NOT_FOUND;
197 }
198
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199 ctx = avfilter_graph_alloc_filter(graph, trim, filter_name);
200 if (!ctx)
201 return AVERROR(ENOMEM);
202
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203 if (duration != INT64_MAX) {
204 ret = av_opt_set_double(ctx, "duration", (double)duration / 1e6,
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205 AV_OPT_SEARCH_CHILDREN);
206 }
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207 if (ret >= 0 && start_time != AV_NOPTS_VALUE) {
208 ret = av_opt_set_double(ctx, "start", (double)start_time / 1e6,
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209 AV_OPT_SEARCH_CHILDREN);
210 }
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211 if (ret < 0) {
212 av_log(ctx, AV_LOG_ERROR, "Error configuring the %s filter", name);
213 return ret;
214 }
215
216 ret = avfilter_init_str(ctx, NULL);
217 if (ret < 0)
218 return ret;
219
220 ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
221 if (ret < 0)
222 return ret;
223
224 *last_filter = ctx;
225 *pad_idx = 0;
226 return 0;
227}
228
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229static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
230{
231 char *pix_fmts;
232 OutputStream *ost = ofilter->ost;
811bd078 233 OutputFile *of = output_files[ost->file_index];
38313626 234 AVCodecContext *codec = ost->enc_ctx;
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235 AVFilterContext *last_filter = out->filter_ctx;
236 int pad_idx = out->pad_idx;
237 int ret;
238 char name[255];
239
240 snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
241 ret = avfilter_graph_create_filter(&ofilter->filter,
242 avfilter_get_by_name("buffersink"),
58dee6e6 243 name, NULL, NULL, fg->graph);
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244 if (ret < 0)
245 return ret;
246
247 if (codec->width || codec->height) {
248 char args[255];
249 AVFilterContext *filter;
250
72fbc968 251 snprintf(args, sizeof(args), "%d:%d:0x%X",
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252 codec->width,
253 codec->height,
254 (unsigned)ost->sws_flags);
255 snprintf(name, sizeof(name), "scaler for output stream %d:%d",
256 ost->file_index, ost->index);
257 if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
258 name, args, NULL, fg->graph)) < 0)
259 return ret;
260 if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
261 return ret;
262
263 last_filter = filter;
264 pad_idx = 0;
265 }
266
267 if ((pix_fmts = choose_pix_fmts(ost))) {
268 AVFilterContext *filter;
269 snprintf(name, sizeof(name), "pixel format for output stream %d:%d",
270 ost->file_index, ost->index);
271 if ((ret = avfilter_graph_create_filter(&filter,
272 avfilter_get_by_name("format"),
273 "format", pix_fmts, NULL,
274 fg->graph)) < 0)
275 return ret;
276 if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
277 return ret;
278
279 last_filter = filter;
280 pad_idx = 0;
281 av_freep(&pix_fmts);
282 }
283
284 if (ost->frame_rate.num) {
285 AVFilterContext *fps;
286 char args[255];
287
288 snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
289 ost->frame_rate.den);
290 snprintf(name, sizeof(name), "fps for output stream %d:%d",
291 ost->file_index, ost->index);
292 ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
293 name, args, NULL, fg->graph);
294 if (ret < 0)
295 return ret;
296
297 ret = avfilter_link(last_filter, pad_idx, fps, 0);
298 if (ret < 0)
299 return ret;
300 last_filter = fps;
301 pad_idx = 0;
302 }
303
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304 snprintf(name, sizeof(name), "trim for output stream %d:%d",
305 ost->file_index, ost->index);
306 ret = insert_trim(of->start_time, of->recording_time,
307 &last_filter, &pad_idx, name);
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308 if (ret < 0)
309 return ret;
310
311
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312 if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
313 return ret;
314
315 return 0;
316}
317
318static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
319{
320 OutputStream *ost = ofilter->ost;
811bd078 321 OutputFile *of = output_files[ost->file_index];
38313626 322 AVCodecContext *codec = ost->enc_ctx;
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323 AVFilterContext *last_filter = out->filter_ctx;
324 int pad_idx = out->pad_idx;
325 char *sample_fmts, *sample_rates, *channel_layouts;
326 char name[255];
327 int ret;
328
329
330 snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
331 ret = avfilter_graph_create_filter(&ofilter->filter,
332 avfilter_get_by_name("abuffersink"),
333 name, NULL, NULL, fg->graph);
334 if (ret < 0)
335 return ret;
336
337 if (codec->channels && !codec->channel_layout)
338 codec->channel_layout = av_get_default_channel_layout(codec->channels);
339
340 sample_fmts = choose_sample_fmts(ost);
341 sample_rates = choose_sample_rates(ost);
342 channel_layouts = choose_channel_layouts(ost);
343 if (sample_fmts || sample_rates || channel_layouts) {
344 AVFilterContext *format;
345 char args[256];
346 int len = 0;
347
348 if (sample_fmts)
349 len += snprintf(args + len, sizeof(args) - len, "sample_fmts=%s:",
350 sample_fmts);
351 if (sample_rates)
352 len += snprintf(args + len, sizeof(args) - len, "sample_rates=%s:",
353 sample_rates);
354 if (channel_layouts)
355 len += snprintf(args + len, sizeof(args) - len, "channel_layouts=%s:",
356 channel_layouts);
357 args[len - 1] = 0;
358
359 av_freep(&sample_fmts);
360 av_freep(&sample_rates);
361 av_freep(&channel_layouts);
362
363 snprintf(name, sizeof(name), "audio format for output stream %d:%d",
364 ost->file_index, ost->index);
365 ret = avfilter_graph_create_filter(&format,
366 avfilter_get_by_name("aformat"),
367 name, args, NULL, fg->graph);
368 if (ret < 0)
369 return ret;
370
371 ret = avfilter_link(last_filter, pad_idx, format, 0);
372 if (ret < 0)
373 return ret;
374
375 last_filter = format;
376 pad_idx = 0;
377 }
378
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379 snprintf(name, sizeof(name), "trim for output stream %d:%d",
380 ost->file_index, ost->index);
381 ret = insert_trim(of->start_time, of->recording_time,
382 &last_filter, &pad_idx, name);
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383 if (ret < 0)
384 return ret;
385
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386 if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
387 return ret;
388
389 return 0;
390}
391
392#define DESCRIBE_FILTER_LINK(f, inout, in) \
393{ \
394 AVFilterContext *ctx = inout->filter_ctx; \
395 AVFilterPad *pads = in ? ctx->input_pads : ctx->output_pads; \
06cd4c5a 396 int nb_pads = in ? ctx->nb_inputs : ctx->nb_outputs; \
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397 AVIOContext *pb; \
398 \
399 if (avio_open_dyn_buf(&pb) < 0) \
5e3f9979 400 exit(1); \
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401 \
402 avio_printf(pb, "%s", ctx->filter->name); \
403 if (nb_pads > 1) \
404 avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));\
405 avio_w8(pb, 0); \
406 avio_close_dyn_buf(pb, &f->name); \
407}
408
409int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
410{
411 av_freep(&ofilter->name);
412 DESCRIBE_FILTER_LINK(ofilter, out, 0);
413
414 switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
415 case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
416 case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
417 default: av_assert0(0);
418 }
419}
420
421static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
422 AVFilterInOut *in)
423{
2e661f26 424 AVFilterContext *last_filter;
51fc88e7 425 const AVFilter *buffer_filt = avfilter_get_by_name("buffer");
fe2147e9 426 InputStream *ist = ifilter->ist;
811bd078 427 InputFile *f = input_files[ist->file_index];
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428 AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
429 ist->st->time_base;
430 AVRational sar;
431 char args[255], name[255];
811bd078 432 int ret, pad_idx = 0;
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433
434 sar = ist->st->sample_aspect_ratio.num ?
435 ist->st->sample_aspect_ratio :
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436 ist->dec_ctx->sample_aspect_ratio;
437 snprintf(args, sizeof(args), "%d:%d:%d:%d:%d:%d:%d", ist->dec_ctx->width,
438 ist->dec_ctx->height,
439 ist->hwaccel_retrieve_data ? ist->hwaccel_retrieved_pix_fmt : ist->dec_ctx->pix_fmt,
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440 tb.num, tb.den, sar.num, sar.den);
441 snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
442 ist->file_index, ist->st->index);
443
51fc88e7 444 if ((ret = avfilter_graph_create_filter(&ifilter->filter, buffer_filt, name,
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445 args, NULL, fg->graph)) < 0)
446 return ret;
2e661f26 447 last_filter = ifilter->filter;
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448
449 if (ist->framerate.num) {
450 AVFilterContext *setpts;
451
452 snprintf(name, sizeof(name), "force CFR for input from stream %d:%d",
453 ist->file_index, ist->st->index);
454 if ((ret = avfilter_graph_create_filter(&setpts,
455 avfilter_get_by_name("setpts"),
456 name, "N", NULL,
457 fg->graph)) < 0)
458 return ret;
459
2e661f26 460 if ((ret = avfilter_link(last_filter, 0, setpts, 0)) < 0)
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461 return ret;
462
2e661f26 463 last_filter = setpts;
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464 }
465
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466 snprintf(name, sizeof(name), "trim for input stream %d:%d",
467 ist->file_index, ist->st->index);
468 ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
488a0fa6 469 AV_NOPTS_VALUE : 0, f->recording_time, &last_filter, &pad_idx, name);
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470 if (ret < 0)
471 return ret;
472
2e661f26 473 if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
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474 return ret;
475 return 0;
476}
477
478static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
479 AVFilterInOut *in)
480{
2e661f26 481 AVFilterContext *last_filter;
51fc88e7 482 const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer");
fe2147e9 483 InputStream *ist = ifilter->ist;
811bd078 484 InputFile *f = input_files[ist->file_index];
fe2147e9 485 char args[255], name[255];
811bd078 486 int ret, pad_idx = 0;
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487
488 snprintf(args, sizeof(args), "time_base=%d/%d:sample_rate=%d:sample_fmt=%s"
489 ":channel_layout=0x%"PRIx64,
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490 1, ist->dec_ctx->sample_rate,
491 ist->dec_ctx->sample_rate,
492 av_get_sample_fmt_name(ist->dec_ctx->sample_fmt),
493 ist->dec_ctx->channel_layout);
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494 snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
495 ist->file_index, ist->st->index);
496
51fc88e7 497 if ((ret = avfilter_graph_create_filter(&ifilter->filter, abuffer_filt,
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498 name, args, NULL,
499 fg->graph)) < 0)
500 return ret;
2e661f26 501 last_filter = ifilter->filter;
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502
503 if (audio_sync_method > 0) {
504 AVFilterContext *async;
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505 int len = 0;
506
507 av_log(NULL, AV_LOG_WARNING, "-async has been deprecated. Used the "
508 "asyncts audio filter instead.\n");
509
510 if (audio_sync_method > 1)
511 len += snprintf(args + len, sizeof(args) - len, "compensate=1:"
512 "max_comp=%d:", audio_sync_method);
513 snprintf(args + len, sizeof(args) - len, "min_delta=%f",
514 audio_drift_threshold);
515
516 snprintf(name, sizeof(name), "graph %d audio sync for input stream %d:%d",
517 fg->index, ist->file_index, ist->st->index);
518 ret = avfilter_graph_create_filter(&async,
519 avfilter_get_by_name("asyncts"),
520 name, args, NULL, fg->graph);
521 if (ret < 0)
522 return ret;
523
2e661f26 524 ret = avfilter_link(last_filter, 0, async, 0);
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525 if (ret < 0)
526 return ret;
527
2e661f26 528 last_filter = async;
fe2147e9 529 }
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530 if (audio_volume != 256) {
531 AVFilterContext *volume;
532
533 av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume "
534 "audio filter instead.\n");
535
536 snprintf(args, sizeof(args), "volume=%f", audio_volume / 256.0);
537
538 snprintf(name, sizeof(name), "graph %d volume for input stream %d:%d",
539 fg->index, ist->file_index, ist->st->index);
540 ret = avfilter_graph_create_filter(&volume,
541 avfilter_get_by_name("volume"),
542 name, args, NULL, fg->graph);
543 if (ret < 0)
544 return ret;
545
2e661f26 546 ret = avfilter_link(last_filter, 0, volume, 0);
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547 if (ret < 0)
548 return ret;
549
2e661f26 550 last_filter = volume;
9a71d362 551 }
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552
553 snprintf(name, sizeof(name), "trim for input stream %d:%d",
554 ist->file_index, ist->st->index);
555 ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
488a0fa6 556 AV_NOPTS_VALUE : 0, f->recording_time, &last_filter, &pad_idx, name);
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557 if (ret < 0)
558 return ret;
559
2e661f26 560 if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
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561 return ret;
562
563 return 0;
564}
565
566static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
567 AVFilterInOut *in)
568{
569 av_freep(&ifilter->name);
570 DESCRIBE_FILTER_LINK(ifilter, in, 1);
571
572 switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
573 case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
574 case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
575 default: av_assert0(0);
576 }
577}
578
579int configure_filtergraph(FilterGraph *fg)
580{
581 AVFilterInOut *inputs, *outputs, *cur;
582 int ret, i, init = !fg->graph, simple = !fg->graph_desc;
583 const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
584 fg->graph_desc;
585
586 avfilter_graph_free(&fg->graph);
587 if (!(fg->graph = avfilter_graph_alloc()))
588 return AVERROR(ENOMEM);
589
590 if (simple) {
591 OutputStream *ost = fg->outputs[0]->ost;
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592 char args[512];
593 AVDictionaryEntry *e = NULL;
5c7db097 594
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595 snprintf(args, sizeof(args), "flags=0x%X", (unsigned)ost->sws_flags);
596 fg->graph->scale_sws_opts = av_strdup(args);
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597
598 args[0] = '\0';
599 while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e,
600 AV_DICT_IGNORE_SUFFIX))) {
601 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
602 }
603 if (strlen(args))
604 args[strlen(args) - 1] = '\0';
605 fg->graph->resample_lavr_opts = av_strdup(args);
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606 }
607
608 if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
609 return ret;
610
611 if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
612 av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' does not have "
613 "exactly one input and output.\n", graph_desc);
614 return AVERROR(EINVAL);
615 }
616
617 for (cur = inputs; !simple && init && cur; cur = cur->next)
618 init_input_filter(fg, cur);
619
620 for (cur = inputs, i = 0; cur; cur = cur->next, i++)
621 if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0)
622 return ret;
623 avfilter_inout_free(&inputs);
624
625 if (!init || simple) {
626 /* we already know the mappings between lavfi outputs and output streams,
627 * so we can finish the setup */
628 for (cur = outputs, i = 0; cur; cur = cur->next, i++)
629 configure_output_filter(fg, fg->outputs[i], cur);
630 avfilter_inout_free(&outputs);
631
632 if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
633 return ret;
634 } else {
635 /* wait until output mappings are processed */
636 for (cur = outputs; cur;) {
10bca661 637 GROW_ARRAY(fg->outputs, fg->nb_outputs);
fe2147e9 638 if (!(fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]))))
5e3f9979 639 exit(1);
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640 fg->outputs[fg->nb_outputs - 1]->graph = fg;
641 fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
642 cur = cur->next;
643 fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
644 }
645 }
646
647 return 0;
648}
649
650int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
651{
652 int i;
653 for (i = 0; i < fg->nb_inputs; i++)
654 if (fg->inputs[i]->ist == ist)
655 return 1;
656 return 0;
657}
658