avconv_opt: allocate an OutputFile before the streams.
[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
c1ef30a6
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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
176static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
177{
178 char *pix_fmts;
179 OutputStream *ost = ofilter->ost;
180 AVCodecContext *codec = ost->st->codec;
181 AVFilterContext *last_filter = out->filter_ctx;
182 int pad_idx = out->pad_idx;
183 int ret;
184 char name[255];
185
186 snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
187 ret = avfilter_graph_create_filter(&ofilter->filter,
188 avfilter_get_by_name("buffersink"),
58dee6e6 189 name, NULL, NULL, fg->graph);
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190 if (ret < 0)
191 return ret;
192
193 if (codec->width || codec->height) {
194 char args[255];
195 AVFilterContext *filter;
196
197 snprintf(args, sizeof(args), "%d:%d:flags=0x%X",
198 codec->width,
199 codec->height,
200 (unsigned)ost->sws_flags);
201 snprintf(name, sizeof(name), "scaler for output stream %d:%d",
202 ost->file_index, ost->index);
203 if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
204 name, args, NULL, fg->graph)) < 0)
205 return ret;
206 if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
207 return ret;
208
209 last_filter = filter;
210 pad_idx = 0;
211 }
212
213 if ((pix_fmts = choose_pix_fmts(ost))) {
214 AVFilterContext *filter;
215 snprintf(name, sizeof(name), "pixel format for output stream %d:%d",
216 ost->file_index, ost->index);
217 if ((ret = avfilter_graph_create_filter(&filter,
218 avfilter_get_by_name("format"),
219 "format", pix_fmts, NULL,
220 fg->graph)) < 0)
221 return ret;
222 if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
223 return ret;
224
225 last_filter = filter;
226 pad_idx = 0;
227 av_freep(&pix_fmts);
228 }
229
230 if (ost->frame_rate.num) {
231 AVFilterContext *fps;
232 char args[255];
233
234 snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
235 ost->frame_rate.den);
236 snprintf(name, sizeof(name), "fps for output stream %d:%d",
237 ost->file_index, ost->index);
238 ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
239 name, args, NULL, fg->graph);
240 if (ret < 0)
241 return ret;
242
243 ret = avfilter_link(last_filter, pad_idx, fps, 0);
244 if (ret < 0)
245 return ret;
246 last_filter = fps;
247 pad_idx = 0;
248 }
249
250 if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
251 return ret;
252
253 return 0;
254}
255
256static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
257{
258 OutputStream *ost = ofilter->ost;
259 AVCodecContext *codec = ost->st->codec;
260 AVFilterContext *last_filter = out->filter_ctx;
261 int pad_idx = out->pad_idx;
262 char *sample_fmts, *sample_rates, *channel_layouts;
263 char name[255];
264 int ret;
265
266
267 snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
268 ret = avfilter_graph_create_filter(&ofilter->filter,
269 avfilter_get_by_name("abuffersink"),
270 name, NULL, NULL, fg->graph);
271 if (ret < 0)
272 return ret;
273
274 if (codec->channels && !codec->channel_layout)
275 codec->channel_layout = av_get_default_channel_layout(codec->channels);
276
277 sample_fmts = choose_sample_fmts(ost);
278 sample_rates = choose_sample_rates(ost);
279 channel_layouts = choose_channel_layouts(ost);
280 if (sample_fmts || sample_rates || channel_layouts) {
281 AVFilterContext *format;
282 char args[256];
283 int len = 0;
284
285 if (sample_fmts)
286 len += snprintf(args + len, sizeof(args) - len, "sample_fmts=%s:",
287 sample_fmts);
288 if (sample_rates)
289 len += snprintf(args + len, sizeof(args) - len, "sample_rates=%s:",
290 sample_rates);
291 if (channel_layouts)
292 len += snprintf(args + len, sizeof(args) - len, "channel_layouts=%s:",
293 channel_layouts);
294 args[len - 1] = 0;
295
296 av_freep(&sample_fmts);
297 av_freep(&sample_rates);
298 av_freep(&channel_layouts);
299
300 snprintf(name, sizeof(name), "audio format for output stream %d:%d",
301 ost->file_index, ost->index);
302 ret = avfilter_graph_create_filter(&format,
303 avfilter_get_by_name("aformat"),
304 name, args, NULL, fg->graph);
305 if (ret < 0)
306 return ret;
307
308 ret = avfilter_link(last_filter, pad_idx, format, 0);
309 if (ret < 0)
310 return ret;
311
312 last_filter = format;
313 pad_idx = 0;
314 }
315
316 if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
317 return ret;
318
319 return 0;
320}
321
322#define DESCRIBE_FILTER_LINK(f, inout, in) \
323{ \
324 AVFilterContext *ctx = inout->filter_ctx; \
325 AVFilterPad *pads = in ? ctx->input_pads : ctx->output_pads; \
326 int nb_pads = in ? ctx->input_count : ctx->output_count; \
327 AVIOContext *pb; \
328 \
329 if (avio_open_dyn_buf(&pb) < 0) \
5e3f9979 330 exit(1); \
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331 \
332 avio_printf(pb, "%s", ctx->filter->name); \
333 if (nb_pads > 1) \
334 avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));\
335 avio_w8(pb, 0); \
336 avio_close_dyn_buf(pb, &f->name); \
337}
338
339int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
340{
341 av_freep(&ofilter->name);
342 DESCRIBE_FILTER_LINK(ofilter, out, 0);
343
344 switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
345 case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
346 case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
347 default: av_assert0(0);
348 }
349}
350
351static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
352 AVFilterInOut *in)
353{
354 AVFilterContext *first_filter = in->filter_ctx;
355 AVFilter *filter = avfilter_get_by_name("buffer");
356 InputStream *ist = ifilter->ist;
357 AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
358 ist->st->time_base;
359 AVRational sar;
360 char args[255], name[255];
361 int pad_idx = in->pad_idx;
362 int ret;
363
364 sar = ist->st->sample_aspect_ratio.num ?
365 ist->st->sample_aspect_ratio :
366 ist->st->codec->sample_aspect_ratio;
367 snprintf(args, sizeof(args), "%d:%d:%d:%d:%d:%d:%d", ist->st->codec->width,
368 ist->st->codec->height, ist->st->codec->pix_fmt,
369 tb.num, tb.den, sar.num, sar.den);
370 snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
371 ist->file_index, ist->st->index);
372
373 if ((ret = avfilter_graph_create_filter(&ifilter->filter, filter, name,
374 args, NULL, fg->graph)) < 0)
375 return ret;
376
377 if (ist->framerate.num) {
378 AVFilterContext *setpts;
379
380 snprintf(name, sizeof(name), "force CFR for input from stream %d:%d",
381 ist->file_index, ist->st->index);
382 if ((ret = avfilter_graph_create_filter(&setpts,
383 avfilter_get_by_name("setpts"),
384 name, "N", NULL,
385 fg->graph)) < 0)
386 return ret;
387
388 if ((ret = avfilter_link(setpts, 0, first_filter, pad_idx)) < 0)
389 return ret;
390
391 first_filter = setpts;
392 pad_idx = 0;
393 }
394
395 if ((ret = avfilter_link(ifilter->filter, 0, first_filter, pad_idx)) < 0)
396 return ret;
397 return 0;
398}
399
400static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
401 AVFilterInOut *in)
402{
403 AVFilterContext *first_filter = in->filter_ctx;
404 AVFilter *filter = avfilter_get_by_name("abuffer");
405 InputStream *ist = ifilter->ist;
406 int pad_idx = in->pad_idx;
407 char args[255], name[255];
408 int ret;
409
410 snprintf(args, sizeof(args), "time_base=%d/%d:sample_rate=%d:sample_fmt=%s"
411 ":channel_layout=0x%"PRIx64,
412 1, ist->st->codec->sample_rate,
413 ist->st->codec->sample_rate,
414 av_get_sample_fmt_name(ist->st->codec->sample_fmt),
415 ist->st->codec->channel_layout);
416 snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
417 ist->file_index, ist->st->index);
418
419 if ((ret = avfilter_graph_create_filter(&ifilter->filter, filter,
420 name, args, NULL,
421 fg->graph)) < 0)
422 return ret;
423
424 if (audio_sync_method > 0) {
425 AVFilterContext *async;
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426 int len = 0;
427
428 av_log(NULL, AV_LOG_WARNING, "-async has been deprecated. Used the "
429 "asyncts audio filter instead.\n");
430
431 if (audio_sync_method > 1)
432 len += snprintf(args + len, sizeof(args) - len, "compensate=1:"
433 "max_comp=%d:", audio_sync_method);
434 snprintf(args + len, sizeof(args) - len, "min_delta=%f",
435 audio_drift_threshold);
436
437 snprintf(name, sizeof(name), "graph %d audio sync for input stream %d:%d",
438 fg->index, ist->file_index, ist->st->index);
439 ret = avfilter_graph_create_filter(&async,
440 avfilter_get_by_name("asyncts"),
441 name, args, NULL, fg->graph);
442 if (ret < 0)
443 return ret;
444
445 ret = avfilter_link(async, 0, first_filter, pad_idx);
446 if (ret < 0)
447 return ret;
448
449 first_filter = async;
450 pad_idx = 0;
451 }
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452 if (audio_volume != 256) {
453 AVFilterContext *volume;
454
455 av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume "
456 "audio filter instead.\n");
457
458 snprintf(args, sizeof(args), "volume=%f", audio_volume / 256.0);
459
460 snprintf(name, sizeof(name), "graph %d volume for input stream %d:%d",
461 fg->index, ist->file_index, ist->st->index);
462 ret = avfilter_graph_create_filter(&volume,
463 avfilter_get_by_name("volume"),
464 name, args, NULL, fg->graph);
465 if (ret < 0)
466 return ret;
467
468 ret = avfilter_link(volume, 0, first_filter, pad_idx);
469 if (ret < 0)
470 return ret;
471
472 first_filter = volume;
473 pad_idx = 0;
474 }
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475 if ((ret = avfilter_link(ifilter->filter, 0, first_filter, pad_idx)) < 0)
476 return ret;
477
478 return 0;
479}
480
481static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
482 AVFilterInOut *in)
483{
484 av_freep(&ifilter->name);
485 DESCRIBE_FILTER_LINK(ifilter, in, 1);
486
487 switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
488 case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
489 case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
490 default: av_assert0(0);
491 }
492}
493
494int configure_filtergraph(FilterGraph *fg)
495{
496 AVFilterInOut *inputs, *outputs, *cur;
497 int ret, i, init = !fg->graph, simple = !fg->graph_desc;
498 const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
499 fg->graph_desc;
500
501 avfilter_graph_free(&fg->graph);
502 if (!(fg->graph = avfilter_graph_alloc()))
503 return AVERROR(ENOMEM);
504
505 if (simple) {
506 OutputStream *ost = fg->outputs[0]->ost;
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507 char args[512];
508 AVDictionaryEntry *e = NULL;
5c7db097 509
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510 snprintf(args, sizeof(args), "flags=0x%X", (unsigned)ost->sws_flags);
511 fg->graph->scale_sws_opts = av_strdup(args);
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512
513 args[0] = '\0';
514 while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e,
515 AV_DICT_IGNORE_SUFFIX))) {
516 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
517 }
518 if (strlen(args))
519 args[strlen(args) - 1] = '\0';
520 fg->graph->resample_lavr_opts = av_strdup(args);
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521 }
522
523 if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
524 return ret;
525
526 if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
527 av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' does not have "
528 "exactly one input and output.\n", graph_desc);
529 return AVERROR(EINVAL);
530 }
531
532 for (cur = inputs; !simple && init && cur; cur = cur->next)
533 init_input_filter(fg, cur);
534
535 for (cur = inputs, i = 0; cur; cur = cur->next, i++)
536 if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0)
537 return ret;
538 avfilter_inout_free(&inputs);
539
540 if (!init || simple) {
541 /* we already know the mappings between lavfi outputs and output streams,
542 * so we can finish the setup */
543 for (cur = outputs, i = 0; cur; cur = cur->next, i++)
544 configure_output_filter(fg, fg->outputs[i], cur);
545 avfilter_inout_free(&outputs);
546
547 if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
548 return ret;
549 } else {
550 /* wait until output mappings are processed */
551 for (cur = outputs; cur;) {
10bca661 552 GROW_ARRAY(fg->outputs, fg->nb_outputs);
fe2147e9 553 if (!(fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]))))
5e3f9979 554 exit(1);
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555 fg->outputs[fg->nb_outputs - 1]->graph = fg;
556 fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
557 cur = cur->next;
558 fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
559 }
560 }
561
562 return 0;
563}
564
565int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
566{
567 int i;
568 for (i = 0; i < fg->nb_inputs; i++)
569 if (fg->inputs[i]->ist == ist)
570 return 1;
571 return 0;
572}
573