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