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