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1/*
2 * ffmpeg filter configuration
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg 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 * FFmpeg 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 FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21#include <stdint.h>
22
23#include "ffmpeg.h"
24
25#include "libavfilter/avfilter.h"
26#include "libavfilter/buffersink.h"
27#include "libavfilter/buffersrc.h"
28
29#include "libavresample/avresample.h"
30
31#include "libavutil/avassert.h"
32#include "libavutil/avstring.h"
33#include "libavutil/bprint.h"
34#include "libavutil/channel_layout.h"
35#include "libavutil/display.h"
36#include "libavutil/opt.h"
37#include "libavutil/pixdesc.h"
38#include "libavutil/pixfmt.h"
39#include "libavutil/imgutils.h"
40#include "libavutil/samplefmt.h"
41
42static const enum AVPixelFormat *get_compliance_unofficial_pix_fmts(enum AVCodecID codec_id, const enum AVPixelFormat default_formats[])
43{
44 static const enum AVPixelFormat mjpeg_formats[] =
45 { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P,
46 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P,
47 AV_PIX_FMT_NONE };
48 static const enum AVPixelFormat ljpeg_formats[] =
49 { AV_PIX_FMT_BGR24 , AV_PIX_FMT_BGRA , AV_PIX_FMT_BGR0,
50 AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P,
51 AV_PIX_FMT_YUV420P , AV_PIX_FMT_YUV444P , AV_PIX_FMT_YUV422P,
52 AV_PIX_FMT_NONE};
53
54 if (codec_id == AV_CODEC_ID_MJPEG) {
55 return mjpeg_formats;
56 } else if (codec_id == AV_CODEC_ID_LJPEG) {
57 return ljpeg_formats;
58 } else {
59 return default_formats;
60 }
61}
62
63enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodecContext *enc_ctx, AVCodec *codec, enum AVPixelFormat target)
64{
65 if (codec && codec->pix_fmts) {
66 const enum AVPixelFormat *p = codec->pix_fmts;
67 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(target);
68 int has_alpha = desc ? desc->nb_components % 2 == 0 : 0;
69 enum AVPixelFormat best= AV_PIX_FMT_NONE;
70
71 if (enc_ctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
72 p = get_compliance_unofficial_pix_fmts(enc_ctx->codec_id, p);
73 }
74 for (; *p != AV_PIX_FMT_NONE; p++) {
75 best= avcodec_find_best_pix_fmt_of_2(best, *p, target, has_alpha, NULL);
76 if (*p == target)
77 break;
78 }
79 if (*p == AV_PIX_FMT_NONE) {
80 if (target != AV_PIX_FMT_NONE)
81 av_log(NULL, AV_LOG_WARNING,
82 "Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
83 av_get_pix_fmt_name(target),
84 codec->name,
85 av_get_pix_fmt_name(best));
86 return best;
87 }
88 }
89 return target;
90}
91
92void choose_sample_fmt(AVStream *st, AVCodec *codec)
93{
94 if (codec && codec->sample_fmts) {
95 const enum AVSampleFormat *p = codec->sample_fmts;
96 for (; *p != -1; p++) {
97 if (*p == st->codecpar->format)
98 break;
99 }
100 if (*p == -1) {
101 if((codec->capabilities & AV_CODEC_CAP_LOSSLESS) && av_get_sample_fmt_name(st->codecpar->format) > av_get_sample_fmt_name(codec->sample_fmts[0]))
102 av_log(NULL, AV_LOG_ERROR, "Conversion will not be lossless.\n");
103 if(av_get_sample_fmt_name(st->codecpar->format))
104 av_log(NULL, AV_LOG_WARNING,
105 "Incompatible sample format '%s' for codec '%s', auto-selecting format '%s'\n",
106 av_get_sample_fmt_name(st->codecpar->format),
107 codec->name,
108 av_get_sample_fmt_name(codec->sample_fmts[0]));
109 st->codecpar->format = codec->sample_fmts[0];
110 }
111 }
112}
113
114static char *choose_pix_fmts(OutputFilter *ofilter)
115{
116 OutputStream *ost = ofilter->ost;
117 AVDictionaryEntry *strict_dict = av_dict_get(ost->encoder_opts, "strict", NULL, 0);
118 if (strict_dict)
119 // used by choose_pixel_fmt() and below
120 av_opt_set(ost->enc_ctx, "strict", strict_dict->value, 0);
121
122 if (ost->keep_pix_fmt) {
123 avfilter_graph_set_auto_convert(ofilter->graph->graph,
124 AVFILTER_AUTO_CONVERT_NONE);
125 if (ost->enc_ctx->pix_fmt == AV_PIX_FMT_NONE)
126 return NULL;
127 return av_strdup(av_get_pix_fmt_name(ost->enc_ctx->pix_fmt));
128 }
129 if (ost->enc_ctx->pix_fmt != AV_PIX_FMT_NONE) {
130 return av_strdup(av_get_pix_fmt_name(choose_pixel_fmt(ost->st, ost->enc_ctx, ost->enc, ost->enc_ctx->pix_fmt)));
131 } else if (ost->enc && ost->enc->pix_fmts) {
132 const enum AVPixelFormat *p;
133 AVIOContext *s = NULL;
134 uint8_t *ret;
135 int len;
136
137 if (avio_open_dyn_buf(&s) < 0)
138 exit_program(1);
139
140 p = ost->enc->pix_fmts;
141 if (ost->enc_ctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
142 p = get_compliance_unofficial_pix_fmts(ost->enc_ctx->codec_id, p);
143 }
144
145 for (; *p != AV_PIX_FMT_NONE; p++) {
146 const char *name = av_get_pix_fmt_name(*p);
147 avio_printf(s, "%s|", name);
148 }
149 len = avio_close_dyn_buf(s, &ret);
150 ret[len - 1] = 0;
151 return ret;
152 } else
153 return NULL;
154}
155
156/* Define a function for building a string containing a list of
157 * allowed formats. */
158#define DEF_CHOOSE_FORMAT(suffix, type, var, supported_list, none, get_name) \
159static char *choose_ ## suffix (OutputFilter *ofilter) \
160{ \
161 if (ofilter->var != none) { \
162 get_name(ofilter->var); \
163 return av_strdup(name); \
164 } else if (ofilter->supported_list) { \
165 const type *p; \
166 AVIOContext *s = NULL; \
167 uint8_t *ret; \
168 int len; \
169 \
170 if (avio_open_dyn_buf(&s) < 0) \
171 exit_program(1); \
172 \
173 for (p = ofilter->supported_list; *p != none; p++) { \
174 get_name(*p); \
175 avio_printf(s, "%s|", name); \
176 } \
177 len = avio_close_dyn_buf(s, &ret); \
178 ret[len - 1] = 0; \
179 return ret; \
180 } else \
181 return NULL; \
182}
183
184//DEF_CHOOSE_FORMAT(pix_fmts, enum AVPixelFormat, format, formats, AV_PIX_FMT_NONE,
185// GET_PIX_FMT_NAME)
186
187DEF_CHOOSE_FORMAT(sample_fmts, enum AVSampleFormat, format, formats,
188 AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME)
189
190DEF_CHOOSE_FORMAT(sample_rates, int, sample_rate, sample_rates, 0,
191 GET_SAMPLE_RATE_NAME)
192
193DEF_CHOOSE_FORMAT(channel_layouts, uint64_t, channel_layout, channel_layouts, 0,
194 GET_CH_LAYOUT_NAME)
195
196int init_simple_filtergraph(InputStream *ist, OutputStream *ost)
197{
198 FilterGraph *fg = av_mallocz(sizeof(*fg));
199
200 if (!fg)
201 exit_program(1);
202 fg->index = nb_filtergraphs;
203
204 GROW_ARRAY(fg->outputs, fg->nb_outputs);
205 if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
206 exit_program(1);
207 fg->outputs[0]->ost = ost;
208 fg->outputs[0]->graph = fg;
209 fg->outputs[0]->format = -1;
210
211 ost->filter = fg->outputs[0];
212
213 GROW_ARRAY(fg->inputs, fg->nb_inputs);
214 if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
215 exit_program(1);
216 fg->inputs[0]->ist = ist;
217 fg->inputs[0]->graph = fg;
218 fg->inputs[0]->format = -1;
219
220 fg->inputs[0]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
221 if (!fg->inputs[0]->frame_queue)
222 exit_program(1);
223
224 GROW_ARRAY(ist->filters, ist->nb_filters);
225 ist->filters[ist->nb_filters - 1] = fg->inputs[0];
226
227 GROW_ARRAY(filtergraphs, nb_filtergraphs);
228 filtergraphs[nb_filtergraphs - 1] = fg;
229
230 return 0;
231}
232
233static char *describe_filter_link(FilterGraph *fg, AVFilterInOut *inout, int in)
234{
235 AVFilterContext *ctx = inout->filter_ctx;
236 AVFilterPad *pads = in ? ctx->input_pads : ctx->output_pads;
237 int nb_pads = in ? ctx->nb_inputs : ctx->nb_outputs;
238 AVIOContext *pb;
239 uint8_t *res = NULL;
240
241 if (avio_open_dyn_buf(&pb) < 0)
242 exit_program(1);
243
244 avio_printf(pb, "%s", ctx->filter->name);
245 if (nb_pads > 1)
246 avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));
247 avio_w8(pb, 0);
248 avio_close_dyn_buf(pb, &res);
249 return res;
250}
251
252static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
253{
254 InputStream *ist = NULL;
255 enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
256 int i;
257
258 // TODO: support other filter types
259 if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
260 av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
261 "currently.\n");
262 exit_program(1);
263 }
264
265 if (in->name) {
266 AVFormatContext *s;
267 AVStream *st = NULL;
268 char *p;
269 int file_idx = strtol(in->name, &p, 0);
270
271 if (file_idx < 0 || file_idx >= nb_input_files) {
272 av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtergraph description %s.\n",
273 file_idx, fg->graph_desc);
274 exit_program(1);
275 }
276 s = input_files[file_idx]->ctx;
277
278 for (i = 0; i < s->nb_streams; i++) {
279 enum AVMediaType stream_type = s->streams[i]->codecpar->codec_type;
280 if (stream_type != type &&
281 !(stream_type == AVMEDIA_TYPE_SUBTITLE &&
282 type == AVMEDIA_TYPE_VIDEO /* sub2video hack */))
283 continue;
284 if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
285 st = s->streams[i];
286 break;
287 }
288 }
289 if (!st) {
290 av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
291 "matches no streams.\n", p, fg->graph_desc);
292 exit_program(1);
293 }
294 ist = input_streams[input_files[file_idx]->ist_index + st->index];
295 } else {
296 /* find the first unused stream of corresponding type */
297 for (i = 0; i < nb_input_streams; i++) {
298 ist = input_streams[i];
299 if (ist->dec_ctx->codec_type == type && ist->discard)
300 break;
301 }
302 if (i == nb_input_streams) {
303 av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
304 "unlabeled input pad %d on filter %s\n", in->pad_idx,
305 in->filter_ctx->name);
306 exit_program(1);
307 }
308 }
309 av_assert0(ist);
310
311 ist->discard = 0;
312 ist->decoding_needed |= DECODING_FOR_FILTER;
313 ist->st->discard = AVDISCARD_NONE;
314
315 GROW_ARRAY(fg->inputs, fg->nb_inputs);
316 if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
317 exit_program(1);
318 fg->inputs[fg->nb_inputs - 1]->ist = ist;
319 fg->inputs[fg->nb_inputs - 1]->graph = fg;
320 fg->inputs[fg->nb_inputs - 1]->format = -1;
321 fg->inputs[fg->nb_inputs - 1]->type = ist->st->codecpar->codec_type;
322 fg->inputs[fg->nb_inputs - 1]->name = describe_filter_link(fg, in, 1);
323
324 fg->inputs[fg->nb_inputs - 1]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
325 if (!fg->inputs[fg->nb_inputs - 1]->frame_queue)
326 exit_program(1);
327
328 GROW_ARRAY(ist->filters, ist->nb_filters);
329 ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
330}
331
332int init_complex_filtergraph(FilterGraph *fg)
333{
334 AVFilterInOut *inputs, *outputs, *cur;
335 AVFilterGraph *graph;
336 int ret = 0;
337
338 /* this graph is only used for determining the kinds of inputs
339 * and outputs we have, and is discarded on exit from this function */
340 graph = avfilter_graph_alloc();
341 if (!graph)
342 return AVERROR(ENOMEM);
343
344 ret = avfilter_graph_parse2(graph, fg->graph_desc, &inputs, &outputs);
345 if (ret < 0)
346 goto fail;
347
348 for (cur = inputs; cur; cur = cur->next)
349 init_input_filter(fg, cur);
350
351 for (cur = outputs; cur;) {
352 GROW_ARRAY(fg->outputs, fg->nb_outputs);
353 fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]));
354 if (!fg->outputs[fg->nb_outputs - 1])
355 exit_program(1);
356
357 fg->outputs[fg->nb_outputs - 1]->graph = fg;
358 fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
359 fg->outputs[fg->nb_outputs - 1]->type = avfilter_pad_get_type(cur->filter_ctx->output_pads,
360 cur->pad_idx);
361 fg->outputs[fg->nb_outputs - 1]->name = describe_filter_link(fg, cur, 0);
362 cur = cur->next;
363 fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
364 }
365
366fail:
367 avfilter_inout_free(&inputs);
368 avfilter_graph_free(&graph);
369 return ret;
370}
371
372static int insert_trim(int64_t start_time, int64_t duration,
373 AVFilterContext **last_filter, int *pad_idx,
374 const char *filter_name)
375{
376 AVFilterGraph *graph = (*last_filter)->graph;
377 AVFilterContext *ctx;
378 const AVFilter *trim;
379 enum AVMediaType type = avfilter_pad_get_type((*last_filter)->output_pads, *pad_idx);
380 const char *name = (type == AVMEDIA_TYPE_VIDEO) ? "trim" : "atrim";
381 int ret = 0;
382
383 if (duration == INT64_MAX && start_time == AV_NOPTS_VALUE)
384 return 0;
385
386 trim = avfilter_get_by_name(name);
387 if (!trim) {
388 av_log(NULL, AV_LOG_ERROR, "%s filter not present, cannot limit "
389 "recording time.\n", name);
390 return AVERROR_FILTER_NOT_FOUND;
391 }
392
393 ctx = avfilter_graph_alloc_filter(graph, trim, filter_name);
394 if (!ctx)
395 return AVERROR(ENOMEM);
396
397 if (duration != INT64_MAX) {
398 ret = av_opt_set_int(ctx, "durationi", duration,
399 AV_OPT_SEARCH_CHILDREN);
400 }
401 if (ret >= 0 && start_time != AV_NOPTS_VALUE) {
402 ret = av_opt_set_int(ctx, "starti", start_time,
403 AV_OPT_SEARCH_CHILDREN);
404 }
405 if (ret < 0) {
406 av_log(ctx, AV_LOG_ERROR, "Error configuring the %s filter", name);
407 return ret;
408 }
409
410 ret = avfilter_init_str(ctx, NULL);
411 if (ret < 0)
412 return ret;
413
414 ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
415 if (ret < 0)
416 return ret;
417
418 *last_filter = ctx;
419 *pad_idx = 0;
420 return 0;
421}
422
423static int insert_filter(AVFilterContext **last_filter, int *pad_idx,
424 const char *filter_name, const char *args)
425{
426 AVFilterGraph *graph = (*last_filter)->graph;
427 AVFilterContext *ctx;
428 int ret;
429
430 ret = avfilter_graph_create_filter(&ctx,
431 avfilter_get_by_name(filter_name),
432 filter_name, args, NULL, graph);
433 if (ret < 0)
434 return ret;
435
436 ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
437 if (ret < 0)
438 return ret;
439
440 *last_filter = ctx;
441 *pad_idx = 0;
442 return 0;
443}
444
445static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
446{
447 char *pix_fmts;
448 OutputStream *ost = ofilter->ost;
449 OutputFile *of = output_files[ost->file_index];
450 AVFilterContext *last_filter = out->filter_ctx;
451 int pad_idx = out->pad_idx;
452 int ret;
453 char name[255];
454
455 snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
456 ret = avfilter_graph_create_filter(&ofilter->filter,
457 avfilter_get_by_name("buffersink"),
458 name, NULL, NULL, fg->graph);
459
460 if (ret < 0)
461 return ret;
462
463 if (ofilter->width || ofilter->height) {
464 char args[255];
465 AVFilterContext *filter;
466 AVDictionaryEntry *e = NULL;
467
468 snprintf(args, sizeof(args), "%d:%d",
469 ofilter->width, ofilter->height);
470
471 while ((e = av_dict_get(ost->sws_dict, "", e,
472 AV_DICT_IGNORE_SUFFIX))) {
473 av_strlcatf(args, sizeof(args), ":%s=%s", e->key, e->value);
474 }
475
476 snprintf(name, sizeof(name), "scaler_out_%d_%d",
477 ost->file_index, ost->index);
478 if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
479 name, args, NULL, fg->graph)) < 0)
480 return ret;
481 if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
482 return ret;
483
484 last_filter = filter;
485 pad_idx = 0;
486 }
487
488 if ((pix_fmts = choose_pix_fmts(ofilter))) {
489 AVFilterContext *filter;
490 snprintf(name, sizeof(name), "format_out_%d_%d",
491 ost->file_index, ost->index);
492 ret = avfilter_graph_create_filter(&filter,
493 avfilter_get_by_name("format"),
494 "format", pix_fmts, NULL, fg->graph);
495 av_freep(&pix_fmts);
496 if (ret < 0)
497 return ret;
498 if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
499 return ret;
500
501 last_filter = filter;
502 pad_idx = 0;
503 }
504
505 if (ost->frame_rate.num && 0) {
506 AVFilterContext *fps;
507 char args[255];
508
509 snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
510 ost->frame_rate.den);
511 snprintf(name, sizeof(name), "fps_out_%d_%d",
512 ost->file_index, ost->index);
513 ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
514 name, args, NULL, fg->graph);
515 if (ret < 0)
516 return ret;
517
518 ret = avfilter_link(last_filter, pad_idx, fps, 0);
519 if (ret < 0)
520 return ret;
521 last_filter = fps;
522 pad_idx = 0;
523 }
524
525 snprintf(name, sizeof(name), "trim_out_%d_%d",
526 ost->file_index, ost->index);
527 ret = insert_trim(of->start_time, of->recording_time,
528 &last_filter, &pad_idx, name);
529 if (ret < 0)
530 return ret;
531
532
533 if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
534 return ret;
535
536 return 0;
537}
538
539static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
540{
541 OutputStream *ost = ofilter->ost;
542 OutputFile *of = output_files[ost->file_index];
543 AVCodecContext *codec = ost->enc_ctx;
544 AVFilterContext *last_filter = out->filter_ctx;
545 int pad_idx = out->pad_idx;
546 char *sample_fmts, *sample_rates, *channel_layouts;
547 char name[255];
548 int ret;
549
550 snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
551 ret = avfilter_graph_create_filter(&ofilter->filter,
552 avfilter_get_by_name("abuffersink"),
553 name, NULL, NULL, fg->graph);
554 if (ret < 0)
555 return ret;
556 if ((ret = av_opt_set_int(ofilter->filter, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
557 return ret;
558
559#define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do { \
560 AVFilterContext *filt_ctx; \
561 \
562 av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
563 "similarly to -af " filter_name "=%s.\n", arg); \
564 \
565 ret = avfilter_graph_create_filter(&filt_ctx, \
566 avfilter_get_by_name(filter_name), \
567 filter_name, arg, NULL, fg->graph); \
568 if (ret < 0) \
569 return ret; \
570 \
571 ret = avfilter_link(last_filter, pad_idx, filt_ctx, 0); \
572 if (ret < 0) \
573 return ret; \
574 \
575 last_filter = filt_ctx; \
576 pad_idx = 0; \
577} while (0)
578 if (ost->audio_channels_mapped) {
579 int i;
580 AVBPrint pan_buf;
581 av_bprint_init(&pan_buf, 256, 8192);
582 av_bprintf(&pan_buf, "0x%"PRIx64,
583 av_get_default_channel_layout(ost->audio_channels_mapped));
584 for (i = 0; i < ost->audio_channels_mapped; i++)
585 if (ost->audio_channels_map[i] != -1)
586 av_bprintf(&pan_buf, "|c%d=c%d", i, ost->audio_channels_map[i]);
587
588 AUTO_INSERT_FILTER("-map_channel", "pan", pan_buf.str);
589 av_bprint_finalize(&pan_buf, NULL);
590 }
591
592 if (codec->channels && !codec->channel_layout)
593 codec->channel_layout = av_get_default_channel_layout(codec->channels);
594
595 sample_fmts = choose_sample_fmts(ofilter);
596 sample_rates = choose_sample_rates(ofilter);
597 channel_layouts = choose_channel_layouts(ofilter);
598 if (sample_fmts || sample_rates || channel_layouts) {
599 AVFilterContext *format;
600 char args[256];
601 args[0] = 0;
602
603 if (sample_fmts)
604 av_strlcatf(args, sizeof(args), "sample_fmts=%s:",
605 sample_fmts);
606 if (sample_rates)
607 av_strlcatf(args, sizeof(args), "sample_rates=%s:",
608 sample_rates);
609 if (channel_layouts)
610 av_strlcatf(args, sizeof(args), "channel_layouts=%s:",
611 channel_layouts);
612
613 av_freep(&sample_fmts);
614 av_freep(&sample_rates);
615 av_freep(&channel_layouts);
616
617 snprintf(name, sizeof(name), "format_out_%d_%d",
618 ost->file_index, ost->index);
619 ret = avfilter_graph_create_filter(&format,
620 avfilter_get_by_name("aformat"),
621 name, args, NULL, fg->graph);
622 if (ret < 0)
623 return ret;
624
625 ret = avfilter_link(last_filter, pad_idx, format, 0);
626 if (ret < 0)
627 return ret;
628
629 last_filter = format;
630 pad_idx = 0;
631 }
632
633 if (audio_volume != 256 && 0) {
634 char args[256];
635
636 snprintf(args, sizeof(args), "%f", audio_volume / 256.);
637 AUTO_INSERT_FILTER("-vol", "volume", args);
638 }
639
640 if (ost->apad && of->shortest) {
641 char args[256];
642 int i;
643
644 for (i=0; i<of->ctx->nb_streams; i++)
645 if (of->ctx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
646 break;
647
648 if (i<of->ctx->nb_streams) {
649 snprintf(args, sizeof(args), "%s", ost->apad);
650 AUTO_INSERT_FILTER("-apad", "apad", args);
651 }
652 }
653
654 snprintf(name, sizeof(name), "trim for output stream %d:%d",
655 ost->file_index, ost->index);
656 ret = insert_trim(of->start_time, of->recording_time,
657 &last_filter, &pad_idx, name);
658 if (ret < 0)
659 return ret;
660
661 if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
662 return ret;
663
664 return 0;
665}
666
667int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
668{
669 if (!ofilter->ost) {
670 av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", ofilter->name);
671 exit_program(1);
672 }
673
674 switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
675 case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
676 case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
677 default: av_assert0(0);
678 }
679}
680
681void check_filter_outputs(void)
682{
683 int i;
684 for (i = 0; i < nb_filtergraphs; i++) {
685 int n;
686 for (n = 0; n < filtergraphs[i]->nb_outputs; n++) {
687 OutputFilter *output = filtergraphs[i]->outputs[n];
688 if (!output->ost) {
689 av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", output->name);
690 exit_program(1);
691 }
692 }
693 }
694}
695
696static int sub2video_prepare(InputStream *ist, InputFilter *ifilter)
697{
698 AVFormatContext *avf = input_files[ist->file_index]->ctx;
699 int i, w, h;
700
701 /* Compute the size of the canvas for the subtitles stream.
702 If the subtitles codecpar has set a size, use it. Otherwise use the
703 maximum dimensions of the video streams in the same file. */
704 w = ifilter->width;
705 h = ifilter->height;
706 if (!(w && h)) {
707 for (i = 0; i < avf->nb_streams; i++) {
708 if (avf->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
709 w = FFMAX(w, avf->streams[i]->codecpar->width);
710 h = FFMAX(h, avf->streams[i]->codecpar->height);
711 }
712 }
713 if (!(w && h)) {
714 w = FFMAX(w, 720);
715 h = FFMAX(h, 576);
716 }
717 av_log(avf, AV_LOG_INFO, "sub2video: using %dx%d canvas\n", w, h);
718 }
719 ist->sub2video.w = ifilter->width = w;
720 ist->sub2video.h = ifilter->height = h;
721
722 ifilter->width = ist->dec_ctx->width ? ist->dec_ctx->width : ist->sub2video.w;
723 ifilter->height = ist->dec_ctx->height ? ist->dec_ctx->height : ist->sub2video.h;
724
725 /* rectangles are AV_PIX_FMT_PAL8, but we have no guarantee that the
726 palettes for all rectangles are identical or compatible */
727 ifilter->format = AV_PIX_FMT_RGB32;
728
729 ist->sub2video.frame = av_frame_alloc();
730 if (!ist->sub2video.frame)
731 return AVERROR(ENOMEM);
732 ist->sub2video.last_pts = INT64_MIN;
733 return 0;
734}
735
736static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
737 AVFilterInOut *in)
738{
739 AVFilterContext *last_filter;
740 const AVFilter *buffer_filt = avfilter_get_by_name("buffer");
741 InputStream *ist = ifilter->ist;
742 InputFile *f = input_files[ist->file_index];
743 AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
744 ist->st->time_base;
745 AVRational fr = ist->framerate;
746 AVRational sar;
747 AVBPrint args;
748 char name[255];
749 int ret, pad_idx = 0;
750 int64_t tsoffset = 0;
751 AVBufferSrcParameters *par = av_buffersrc_parameters_alloc();
752
753 if (!par)
754 return AVERROR(ENOMEM);
755 memset(par, 0, sizeof(*par));
756 par->format = AV_PIX_FMT_NONE;
757
758 if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
759 av_log(NULL, AV_LOG_ERROR, "Cannot connect video filter to audio input\n");
760 ret = AVERROR(EINVAL);
761 goto fail;
762 }
763
764 if (!fr.num)
765 fr = av_guess_frame_rate(input_files[ist->file_index]->ctx, ist->st, NULL);
766
767 if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
768 ret = sub2video_prepare(ist, ifilter);
769 if (ret < 0)
770 goto fail;
771 }
772
773 sar = ifilter->sample_aspect_ratio;
774 if(!sar.den)
775 sar = (AVRational){0,1};
776 av_bprint_init(&args, 0, 1);
777 av_bprintf(&args,
778 "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:"
779 "pixel_aspect=%d/%d:sws_param=flags=%d",
780 ifilter->width, ifilter->height, ifilter->format,
781 tb.num, tb.den, sar.num, sar.den,
782 SWS_BILINEAR + ((ist->dec_ctx->flags&AV_CODEC_FLAG_BITEXACT) ? SWS_BITEXACT:0));
783 if (fr.num && fr.den)
784 av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
785 snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
786 ist->file_index, ist->st->index);
787
788
789 if ((ret = avfilter_graph_create_filter(&ifilter->filter, buffer_filt, name,
790 args.str, NULL, fg->graph)) < 0)
791 goto fail;
792 par->hw_frames_ctx = ifilter->hw_frames_ctx;
793 ret = av_buffersrc_parameters_set(ifilter->filter, par);
794 if (ret < 0)
795 goto fail;
796 av_freep(&par);
797 last_filter = ifilter->filter;
798
799 if (ist->autorotate) {
800 double theta = get_rotation(ist->st);
801
802 if (fabs(theta - 90) < 1.0) {
803 ret = insert_filter(&last_filter, &pad_idx, "transpose", "clock");
804 } else if (fabs(theta - 180) < 1.0) {
805 ret = insert_filter(&last_filter, &pad_idx, "hflip", NULL);
806 if (ret < 0)
807 return ret;
808 ret = insert_filter(&last_filter, &pad_idx, "vflip", NULL);
809 } else if (fabs(theta - 270) < 1.0) {
810 ret = insert_filter(&last_filter, &pad_idx, "transpose", "cclock");
811 } else if (fabs(theta) > 1.0) {
812 char rotate_buf[64];
813 snprintf(rotate_buf, sizeof(rotate_buf), "%f*PI/180", theta);
814 ret = insert_filter(&last_filter, &pad_idx, "rotate", rotate_buf);
815 }
816 if (ret < 0)
817 return ret;
818 }
819
820 if (do_deinterlace) {
821 AVFilterContext *yadif;
822
823 snprintf(name, sizeof(name), "deinterlace_in_%d_%d",
824 ist->file_index, ist->st->index);
825 if ((ret = avfilter_graph_create_filter(&yadif,
826 avfilter_get_by_name("yadif"),
827 name, "", NULL,
828 fg->graph)) < 0)
829 return ret;
830
831 if ((ret = avfilter_link(last_filter, 0, yadif, 0)) < 0)
832 return ret;
833
834 last_filter = yadif;
835 }
836
837 snprintf(name, sizeof(name), "trim_in_%d_%d",
838 ist->file_index, ist->st->index);
839 if (copy_ts) {
840 tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
841 if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
842 tsoffset += f->ctx->start_time;
843 }
844 ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
845 AV_NOPTS_VALUE : tsoffset, f->recording_time,
846 &last_filter, &pad_idx, name);
847 if (ret < 0)
848 return ret;
849
850 if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
851 return ret;
852 return 0;
853fail:
854 av_freep(&par);
855
856 return ret;
857}
858
859static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
860 AVFilterInOut *in)
861{
862 AVFilterContext *last_filter;
863 const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer");
864 InputStream *ist = ifilter->ist;
865 InputFile *f = input_files[ist->file_index];
866 AVBPrint args;
867 char name[255];
868 int ret, pad_idx = 0;
869 int64_t tsoffset = 0;
870
871 if (ist->dec_ctx->codec_type != AVMEDIA_TYPE_AUDIO) {
872 av_log(NULL, AV_LOG_ERROR, "Cannot connect audio filter to non audio input\n");
873 return AVERROR(EINVAL);
874 }
875
876 av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
877 av_bprintf(&args, "time_base=%d/%d:sample_rate=%d:sample_fmt=%s",
878 1, ifilter->sample_rate,
879 ifilter->sample_rate,
880 av_get_sample_fmt_name(ifilter->format));
881 if (ifilter->channel_layout)
882 av_bprintf(&args, ":channel_layout=0x%"PRIx64,
883 ifilter->channel_layout);
884 else
885 av_bprintf(&args, ":channels=%d", ifilter->channels);
886 snprintf(name, sizeof(name), "graph_%d_in_%d_%d", fg->index,
887 ist->file_index, ist->st->index);
888
889 if ((ret = avfilter_graph_create_filter(&ifilter->filter, abuffer_filt,
890 name, args.str, NULL,
891 fg->graph)) < 0)
892 return ret;
893 last_filter = ifilter->filter;
894
895#define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg) do { \
896 AVFilterContext *filt_ctx; \
897 \
898 av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
899 "similarly to -af " filter_name "=%s.\n", arg); \
900 \
901 snprintf(name, sizeof(name), "graph_%d_%s_in_%d_%d", \
902 fg->index, filter_name, ist->file_index, ist->st->index); \
903 ret = avfilter_graph_create_filter(&filt_ctx, \
904 avfilter_get_by_name(filter_name), \
905 name, arg, NULL, fg->graph); \
906 if (ret < 0) \
907 return ret; \
908 \
909 ret = avfilter_link(last_filter, 0, filt_ctx, 0); \
910 if (ret < 0) \
911 return ret; \
912 \
913 last_filter = filt_ctx; \
914} while (0)
915
916 if (audio_sync_method > 0) {
917 char args[256] = {0};
918
919 av_strlcatf(args, sizeof(args), "async=%d", audio_sync_method);
920 if (audio_drift_threshold != 0.1)
921 av_strlcatf(args, sizeof(args), ":min_hard_comp=%f", audio_drift_threshold);
922 if (!fg->reconfiguration)
923 av_strlcatf(args, sizeof(args), ":first_pts=0");
924 AUTO_INSERT_FILTER_INPUT("-async", "aresample", args);
925 }
926
927// if (ost->audio_channels_mapped) {
928// int i;
929// AVBPrint pan_buf;
930// av_bprint_init(&pan_buf, 256, 8192);
931// av_bprintf(&pan_buf, "0x%"PRIx64,
932// av_get_default_channel_layout(ost->audio_channels_mapped));
933// for (i = 0; i < ost->audio_channels_mapped; i++)
934// if (ost->audio_channels_map[i] != -1)
935// av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
936// AUTO_INSERT_FILTER_INPUT("-map_channel", "pan", pan_buf.str);
937// av_bprint_finalize(&pan_buf, NULL);
938// }
939
940 if (audio_volume != 256) {
941 char args[256];
942
943 av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume "
944 "audio filter instead.\n");
945
946 snprintf(args, sizeof(args), "%f", audio_volume / 256.);
947 AUTO_INSERT_FILTER_INPUT("-vol", "volume", args);
948 }
949
950 snprintf(name, sizeof(name), "trim for input stream %d:%d",
951 ist->file_index, ist->st->index);
952 if (copy_ts) {
953 tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
954 if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
955 tsoffset += f->ctx->start_time;
956 }
957 ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
958 AV_NOPTS_VALUE : tsoffset, f->recording_time,
959 &last_filter, &pad_idx, name);
960 if (ret < 0)
961 return ret;
962
963 if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
964 return ret;
965
966 return 0;
967}
968
969static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
970 AVFilterInOut *in)
971{
972 if (!ifilter->ist->dec) {
973 av_log(NULL, AV_LOG_ERROR,
974 "No decoder for stream #%d:%d, filtering impossible\n",
975 ifilter->ist->file_index, ifilter->ist->st->index);
976 return AVERROR_DECODER_NOT_FOUND;
977 }
978 switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
979 case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
980 case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
981 default: av_assert0(0);
982 }
983}
984
985static void cleanup_filtergraph(FilterGraph *fg)
986{
987 int i;
988 for (i = 0; i < fg->nb_outputs; i++)
989 fg->outputs[i]->filter = (AVFilterContext *)NULL;
990 for (i = 0; i < fg->nb_inputs; i++)
991 fg->inputs[i]->filter = (AVFilterContext *)NULL;
992 avfilter_graph_free(&fg->graph);
993}
994
995int configure_filtergraph(FilterGraph *fg)
996{
997 AVFilterInOut *inputs, *outputs, *cur;
998 int ret, i, simple = filtergraph_is_simple(fg);
999 const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
1000 fg->graph_desc;
1001
1002 cleanup_filtergraph(fg);
1003 if (!(fg->graph = avfilter_graph_alloc()))
1004 return AVERROR(ENOMEM);
1005
1006 if (simple) {
1007 OutputStream *ost = fg->outputs[0]->ost;
1008 char args[512];
1009 AVDictionaryEntry *e = NULL;
1010
1011 fg->graph->nb_threads = filter_nbthreads;
1012
1013 args[0] = 0;
1014 while ((e = av_dict_get(ost->sws_dict, "", e,
1015 AV_DICT_IGNORE_SUFFIX))) {
1016 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1017 }
1018 if (strlen(args))
1019 args[strlen(args)-1] = 0;
1020 fg->graph->scale_sws_opts = av_strdup(args);
1021
1022 args[0] = 0;
1023 while ((e = av_dict_get(ost->swr_opts, "", e,
1024 AV_DICT_IGNORE_SUFFIX))) {
1025 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1026 }
1027 if (strlen(args))
1028 args[strlen(args)-1] = 0;
1029 av_opt_set(fg->graph, "aresample_swr_opts", args, 0);
1030
1031 args[0] = '\0';
1032 while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e,
1033 AV_DICT_IGNORE_SUFFIX))) {
1034 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1035 }
1036 if (strlen(args))
1037 args[strlen(args) - 1] = '\0';
1038
1039 e = av_dict_get(ost->encoder_opts, "threads", NULL, 0);
1040 if (e)
1041 av_opt_set(fg->graph, "threads", e->value, 0);
1042 } else {
1043 fg->graph->nb_threads = filter_complex_nbthreads;
1044 }
1045
1046 if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
1047 goto fail;
1048
1049 if (hw_device_ctx) {
1050 for (i = 0; i < fg->graph->nb_filters; i++) {
1051 fg->graph->filters[i]->hw_device_ctx = av_buffer_ref(hw_device_ctx);
1052 }
1053 }
1054
1055 if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
1056 const char *num_inputs;
1057 const char *num_outputs;
1058 if (!outputs) {
1059 num_outputs = "0";
1060 } else if (outputs->next) {
1061 num_outputs = ">1";
1062 } else {
1063 num_outputs = "1";
1064 }
1065 if (!inputs) {
1066 num_inputs = "0";
1067 } else if (inputs->next) {
1068 num_inputs = ">1";
1069 } else {
1070 num_inputs = "1";
1071 }
1072 av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' was expected "
1073 "to have exactly 1 input and 1 output."
1074 " However, it had %s input(s) and %s output(s)."
1075 " Please adjust, or use a complex filtergraph (-filter_complex) instead.\n",
1076 graph_desc, num_inputs, num_outputs);
1077 ret = AVERROR(EINVAL);
1078 goto fail;
1079 }
1080
1081 for (cur = inputs, i = 0; cur; cur = cur->next, i++)
1082 if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0) {
1083 avfilter_inout_free(&inputs);
1084 avfilter_inout_free(&outputs);
1085 goto fail;
1086 }
1087 avfilter_inout_free(&inputs);
1088
1089 for (cur = outputs, i = 0; cur; cur = cur->next, i++)
1090 configure_output_filter(fg, fg->outputs[i], cur);
1091 avfilter_inout_free(&outputs);
1092
1093 if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
1094 goto fail;
1095
1096 /* limit the lists of allowed formats to the ones selected, to
1097 * make sure they stay the same if the filtergraph is reconfigured later */
1098 for (i = 0; i < fg->nb_outputs; i++) {
1099 OutputFilter *ofilter = fg->outputs[i];
1100 AVFilterContext *sink = ofilter->filter;
1101
1102 ofilter->format = av_buffersink_get_format(sink);
1103
1104 ofilter->width = av_buffersink_get_w(sink);
1105 ofilter->height = av_buffersink_get_h(sink);
1106
1107 ofilter->sample_rate = av_buffersink_get_sample_rate(sink);
1108 ofilter->channel_layout = av_buffersink_get_channel_layout(sink);
1109 }
1110
1111 fg->reconfiguration = 1;
1112
1113 for (i = 0; i < fg->nb_outputs; i++) {
1114 OutputStream *ost = fg->outputs[i]->ost;
1115 if (!ost->enc) {
1116 /* identical to the same check in ffmpeg.c, needed because
1117 complex filter graphs are initialized earlier */
1118 av_log(NULL, AV_LOG_ERROR, "Encoder (codec %s) not found for output stream #%d:%d\n",
1119 avcodec_get_name(ost->st->codecpar->codec_id), ost->file_index, ost->index);
1120 ret = AVERROR(EINVAL);
1121 goto fail;
1122 }
1123 if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1124 !(ost->enc->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE))
1125 av_buffersink_set_frame_size(ost->filter->filter,
1126 ost->enc_ctx->frame_size);
1127 }
1128
1129 for (i = 0; i < fg->nb_inputs; i++) {
1130 while (av_fifo_size(fg->inputs[i]->frame_queue)) {
1131 AVFrame *tmp;
1132 av_fifo_generic_read(fg->inputs[i]->frame_queue, &tmp, sizeof(tmp), NULL);
1133 ret = av_buffersrc_add_frame(fg->inputs[i]->filter, tmp);
1134 av_frame_free(&tmp);
1135 if (ret < 0)
1136 goto fail;
1137 }
1138 }
1139
1140 /* send the EOFs for the finished inputs */
1141 for (i = 0; i < fg->nb_inputs; i++) {
1142 if (fg->inputs[i]->eof) {
1143 ret = av_buffersrc_add_frame(fg->inputs[i]->filter, NULL);
1144 if (ret < 0)
1145 goto fail;
1146 }
1147 }
1148
1149 /* process queued up subtitle packets */
1150 for (i = 0; i < fg->nb_inputs; i++) {
1151 InputStream *ist = fg->inputs[i]->ist;
1152 if (ist->sub2video.sub_queue && ist->sub2video.frame) {
1153 while (av_fifo_size(ist->sub2video.sub_queue)) {
1154 AVSubtitle tmp;
1155 av_fifo_generic_read(ist->sub2video.sub_queue, &tmp, sizeof(tmp), NULL);
1156 sub2video_update(ist, &tmp);
1157 avsubtitle_free(&tmp);
1158 }
1159 }
1160 }
1161
1162 return 0;
1163
1164fail:
1165 cleanup_filtergraph(fg);
1166 return ret;
1167}
1168
1169int ifilter_parameters_from_frame(InputFilter *ifilter, const AVFrame *frame)
1170{
1171 av_buffer_unref(&ifilter->hw_frames_ctx);
1172
1173 ifilter->format = frame->format;
1174
1175 ifilter->width = frame->width;
1176 ifilter->height = frame->height;
1177 ifilter->sample_aspect_ratio = frame->sample_aspect_ratio;
1178
1179 ifilter->sample_rate = frame->sample_rate;
1180 ifilter->channels = av_frame_get_channels(frame);
1181 ifilter->channel_layout = frame->channel_layout;
1182
1183 if (frame->hw_frames_ctx) {
1184 ifilter->hw_frames_ctx = av_buffer_ref(frame->hw_frames_ctx);
1185 if (!ifilter->hw_frames_ctx)
1186 return AVERROR(ENOMEM);
1187 }
1188
1189 return 0;
1190}
1191
1192int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
1193{
1194 int i;
1195 for (i = 0; i < fg->nb_inputs; i++)
1196 if (fg->inputs[i]->ist == ist)
1197 return 1;
1198 return 0;
1199}
1200
1201int filtergraph_is_simple(FilterGraph *fg)
1202{
1203 return !fg->graph_desc;
1204}
1205
generated by cgit at 2024-05-02 10:17:40 (GMT)