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Imported Debian version 2.4.3~trusty1
[deb_ffmpeg.git] / ffmpeg / ffmpeg_filter.c
CommitLineData
2ba45a60
DM		 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
28#include "libavresample/avresample.h"
29
30#include "libavutil/avassert.h"
31#include "libavutil/avstring.h"
32#include "libavutil/bprint.h"
33#include "libavutil/channel_layout.h"
34#include "libavutil/opt.h"
35#include "libavutil/pixdesc.h"
36#include "libavutil/pixfmt.h"
37#include "libavutil/imgutils.h"
38#include "libavutil/samplefmt.h"
39
40enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodecContext *enc_ctx, AVCodec *codec, enum AVPixelFormat target)
41{
42 if (codec && codec->pix_fmts) {
43 const enum AVPixelFormat *p = codec->pix_fmts;
44 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(target);
45 int has_alpha = desc ? desc->nb_components % 2 == 0 : 0;
46 enum AVPixelFormat best= AV_PIX_FMT_NONE;
47 static const enum AVPixelFormat mjpeg_formats[] =
48 { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_NONE };
49 static const enum AVPixelFormat ljpeg_formats[] =
50 { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUV420P,
51 AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_BGRA, AV_PIX_FMT_NONE };
52
53 if (enc_ctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
54 if (enc_ctx->codec_id == AV_CODEC_ID_MJPEG) {
55 p = mjpeg_formats;
56 } else if (enc_ctx->codec_id == AV_CODEC_ID_LJPEG) {
57 p =ljpeg_formats;
58 }
59 }
60 for (; *p != AV_PIX_FMT_NONE; p++) {
61 best= avcodec_find_best_pix_fmt_of_2(best, *p, target, has_alpha, NULL);
62 if (*p == target)
63 break;
64 }
65 if (*p == AV_PIX_FMT_NONE) {
66 if (target != AV_PIX_FMT_NONE)
67 av_log(NULL, AV_LOG_WARNING,
68 "Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
69 av_get_pix_fmt_name(target),
70 codec->name,
71 av_get_pix_fmt_name(best));
72 return best;
73 }
74 }
75 return target;
76}
77
78void choose_sample_fmt(AVStream *st, AVCodec *codec)
79{
80 if (codec && codec->sample_fmts) {
81 const enum AVSampleFormat *p = codec->sample_fmts;
82 for (; *p != -1; p++) {
83 if (*p == st->codec->sample_fmt)
84 break;
85 }
86 if (*p == -1) {
87 if((codec->capabilities & CODEC_CAP_LOSSLESS) && av_get_sample_fmt_name(st->codec->sample_fmt) > av_get_sample_fmt_name(codec->sample_fmts[0]))
88 av_log(NULL, AV_LOG_ERROR, "Conversion will not be lossless.\n");
89 if(av_get_sample_fmt_name(st->codec->sample_fmt))
90 av_log(NULL, AV_LOG_WARNING,
91 "Incompatible sample format '%s' for codec '%s', auto-selecting format '%s'\n",
92 av_get_sample_fmt_name(st->codec->sample_fmt),
93 codec->name,
94 av_get_sample_fmt_name(codec->sample_fmts[0]));
95 st->codec->sample_fmt = codec->sample_fmts[0];
96 }
97 }
98}
99
100static char *choose_pix_fmts(OutputStream *ost)
101{
102 AVDictionaryEntry *strict_dict = av_dict_get(ost->encoder_opts, "strict", NULL, 0);
103 if (strict_dict)
104 // used by choose_pixel_fmt() and below
105 av_opt_set(ost->enc_ctx, "strict", strict_dict->value, 0);
106
107 if (ost->keep_pix_fmt) {
108 if (ost->filter)
109 avfilter_graph_set_auto_convert(ost->filter->graph->graph,
110 AVFILTER_AUTO_CONVERT_NONE);
111 if (ost->enc_ctx->pix_fmt == AV_PIX_FMT_NONE)
112 return NULL;
113 return av_strdup(av_get_pix_fmt_name(ost->enc_ctx->pix_fmt));
114 }
115 if (ost->enc_ctx->pix_fmt != AV_PIX_FMT_NONE) {
116 return av_strdup(av_get_pix_fmt_name(choose_pixel_fmt(ost->st, ost->enc_ctx, ost->enc, ost->enc_ctx->pix_fmt)));
117 } else if (ost->enc && ost->enc->pix_fmts) {
118 const enum AVPixelFormat *p;
119 AVIOContext *s = NULL;
120 uint8_t *ret;
121 int len;
122
123 if (avio_open_dyn_buf(&s) < 0)
124 exit_program(1);
125
126 p = ost->enc->pix_fmts;
127 if (ost->enc_ctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
128 if (ost->enc_ctx->codec_id == AV_CODEC_ID_MJPEG) {
129 p = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_NONE };
130 } else if (ost->enc_ctx->codec_id == AV_CODEC_ID_LJPEG) {
131 p = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUV420P,
132 AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_BGRA, AV_PIX_FMT_NONE };
133 }
134 }
135
136 for (; *p != AV_PIX_FMT_NONE; p++) {
137 const char *name = av_get_pix_fmt_name(*p);
138 avio_printf(s, "%s|", name);
139 }
140 len = avio_close_dyn_buf(s, &ret);
141 ret[len - 1] = 0;
142 return ret;
143 } else
144 return NULL;
145}
146
147/* Define a function for building a string containing a list of
148 * allowed formats. */
149#define DEF_CHOOSE_FORMAT(type, var, supported_list, none, get_name) \
150static char *choose_ ## var ## s(OutputStream *ost) \
151{ \
152 if (ost->enc_ctx->var != none) { \
153 get_name(ost->enc_ctx->var); \
154 return av_strdup(name); \
155 } else if (ost->enc && ost->enc->supported_list) { \
156 const type *p; \
157 AVIOContext *s = NULL; \
158 uint8_t *ret; \
159 int len; \
160 \
161 if (avio_open_dyn_buf(&s) < 0) \
162 exit_program(1); \
163 \
164 for (p = ost->enc->supported_list; *p != none; p++) { \
165 get_name(*p); \
166 avio_printf(s, "%s|", name); \
167 } \
168 len = avio_close_dyn_buf(s, &ret); \
169 ret[len - 1] = 0; \
170 return ret; \
171 } else \
172 return NULL; \
173}
174
175// DEF_CHOOSE_FORMAT(enum AVPixelFormat, pix_fmt, pix_fmts, AV_PIX_FMT_NONE,
176// GET_PIX_FMT_NAME)
177
178DEF_CHOOSE_FORMAT(enum AVSampleFormat, sample_fmt, sample_fmts,
179 AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME)
180
181DEF_CHOOSE_FORMAT(int, sample_rate, supported_samplerates, 0,
182 GET_SAMPLE_RATE_NAME)
183
184DEF_CHOOSE_FORMAT(uint64_t, channel_layout, channel_layouts, 0,
185 GET_CH_LAYOUT_NAME)
186
187FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost)
188{
189 FilterGraph *fg = av_mallocz(sizeof(*fg));
190
191 if (!fg)
192 exit_program(1);
193 fg->index = nb_filtergraphs;
194
195 GROW_ARRAY(fg->outputs, fg->nb_outputs);
196 if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
197 exit_program(1);
198 fg->outputs[0]->ost = ost;
199 fg->outputs[0]->graph = fg;
200
201 ost->filter = fg->outputs[0];
202
203 GROW_ARRAY(fg->inputs, fg->nb_inputs);
204 if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
205 exit_program(1);
206 fg->inputs[0]->ist = ist;
207 fg->inputs[0]->graph = fg;
208
209 GROW_ARRAY(ist->filters, ist->nb_filters);
210 ist->filters[ist->nb_filters - 1] = fg->inputs[0];
211
212 GROW_ARRAY(filtergraphs, nb_filtergraphs);
213 filtergraphs[nb_filtergraphs - 1] = fg;
214
215 return fg;
216}
217
218static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
219{
220 InputStream *ist = NULL;
221 enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
222 int i;
223
224 // TODO: support other filter types
225 if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
226 av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
227 "currently.\n");
228 exit_program(1);
229 }
230
231 if (in->name) {
232 AVFormatContext *s;
233 AVStream *st = NULL;
234 char *p;
235 int file_idx = strtol(in->name, &p, 0);
236
237 if (file_idx < 0 || file_idx >= nb_input_files) {
238 av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtergraph description %s.\n",
239 file_idx, fg->graph_desc);
240 exit_program(1);
241 }
242 s = input_files[file_idx]->ctx;
243
244 for (i = 0; i < s->nb_streams; i++) {
245 enum AVMediaType stream_type = s->streams[i]->codec->codec_type;
246 if (stream_type != type &&
247 !(stream_type == AVMEDIA_TYPE_SUBTITLE &&
248 type == AVMEDIA_TYPE_VIDEO /* sub2video hack */))
249 continue;
250 if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
251 st = s->streams[i];
252 break;
253 }
254 }
255 if (!st) {
256 av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
257 "matches no streams.\n", p, fg->graph_desc);
258 exit_program(1);
259 }
260 ist = input_streams[input_files[file_idx]->ist_index + st->index];
261 } else {
262 /* find the first unused stream of corresponding type */
263 for (i = 0; i < nb_input_streams; i++) {
264 ist = input_streams[i];
265 if (ist->dec_ctx->codec_type == type && ist->discard)
266 break;
267 }
268 if (i == nb_input_streams) {
269 av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
270 "unlabeled input pad %d on filter %s\n", in->pad_idx,
271 in->filter_ctx->name);
272 exit_program(1);
273 }
274 }
275 av_assert0(ist);
276
277 ist->discard = 0;
278 ist->decoding_needed |= DECODING_FOR_FILTER;
279 ist->st->discard = AVDISCARD_NONE;
280
281 GROW_ARRAY(fg->inputs, fg->nb_inputs);
282 if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
283 exit_program(1);
284 fg->inputs[fg->nb_inputs - 1]->ist = ist;
285 fg->inputs[fg->nb_inputs - 1]->graph = fg;
286
287 GROW_ARRAY(ist->filters, ist->nb_filters);
288 ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
289}
290
291static int insert_trim(int64_t start_time, int64_t duration,
292 AVFilterContext **last_filter, int *pad_idx,
293 const char *filter_name)
294{
295 AVFilterGraph *graph = (*last_filter)->graph;
296 AVFilterContext *ctx;
297 const AVFilter *trim;
298 enum AVMediaType type = avfilter_pad_get_type((*last_filter)->output_pads, *pad_idx);
299 const char *name = (type == AVMEDIA_TYPE_VIDEO) ? "trim" : "atrim";
300 int ret = 0;
301
302 if (duration == INT64_MAX && start_time == AV_NOPTS_VALUE)
303 return 0;
304
305 trim = avfilter_get_by_name(name);
306 if (!trim) {
307 av_log(NULL, AV_LOG_ERROR, "%s filter not present, cannot limit "
308 "recording time.\n", name);
309 return AVERROR_FILTER_NOT_FOUND;
310 }
311
312 ctx = avfilter_graph_alloc_filter(graph, trim, filter_name);
313 if (!ctx)
314 return AVERROR(ENOMEM);
315
316 if (duration != INT64_MAX) {
317 ret = av_opt_set_int(ctx, "durationi", duration,
318 AV_OPT_SEARCH_CHILDREN);
319 }
320 if (ret >= 0 && start_time != AV_NOPTS_VALUE) {
321 ret = av_opt_set_int(ctx, "starti", start_time,
322 AV_OPT_SEARCH_CHILDREN);
323 }
324 if (ret < 0) {
325 av_log(ctx, AV_LOG_ERROR, "Error configuring the %s filter", name);
326 return ret;
327 }
328
329 ret = avfilter_init_str(ctx, NULL);
330 if (ret < 0)
331 return ret;
332
333 ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
334 if (ret < 0)
335 return ret;
336
337 *last_filter = ctx;
338 *pad_idx = 0;
339 return 0;
340}
341
342static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
343{
344 char *pix_fmts;
345 OutputStream *ost = ofilter->ost;
346 OutputFile *of = output_files[ost->file_index];
347 AVCodecContext *codec = ost->enc_ctx;
348 AVFilterContext *last_filter = out->filter_ctx;
349 int pad_idx = out->pad_idx;
350 int ret;
351 char name[255];
352
353 snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
354 ret = avfilter_graph_create_filter(&ofilter->filter,
355 avfilter_get_by_name("buffersink"),
356 name, NULL, NULL, fg->graph);
357
358 if (ret < 0)
359 return ret;
360
361 if (codec->width || codec->height) {
362 char args[255];
363 AVFilterContext *filter;
364
365 snprintf(args, sizeof(args), "%d:%d:0x%X",
366 codec->width,
367 codec->height,
368 (unsigned)ost->sws_flags);
369 snprintf(name, sizeof(name), "scaler for output stream %d:%d",
370 ost->file_index, ost->index);
371 if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
372 name, args, NULL, fg->graph)) < 0)
373 return ret;
374 if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
375 return ret;
376
377 last_filter = filter;
378 pad_idx = 0;
379 }
380
381 if ((pix_fmts = choose_pix_fmts(ost))) {
382 AVFilterContext *filter;
383 snprintf(name, sizeof(name), "pixel format for output stream %d:%d",
384 ost->file_index, ost->index);
385 ret = avfilter_graph_create_filter(&filter,
386 avfilter_get_by_name("format"),
387 "format", pix_fmts, NULL,
388 fg->graph);
389 av_freep(&pix_fmts);
390 if (ret < 0)
391 return ret;
392 if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
393 return ret;
394
395 last_filter = filter;
396 pad_idx = 0;
397 }
398
399 if (ost->frame_rate.num && 0) {
400 AVFilterContext *fps;
401 char args[255];
402
403 snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
404 ost->frame_rate.den);
405 snprintf(name, sizeof(name), "fps for output stream %d:%d",
406 ost->file_index, ost->index);
407 ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
408 name, args, NULL, fg->graph);
409 if (ret < 0)
410 return ret;
411
412 ret = avfilter_link(last_filter, pad_idx, fps, 0);
413 if (ret < 0)
414 return ret;
415 last_filter = fps;
416 pad_idx = 0;
417 }
418
419 snprintf(name, sizeof(name), "trim for output stream %d:%d",
420 ost->file_index, ost->index);
421 ret = insert_trim(of->start_time, of->recording_time,
422 &last_filter, &pad_idx, name);
423 if (ret < 0)
424 return ret;
425
426
427 if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
428 return ret;
429
430 return 0;
431}
432
433static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
434{
435 OutputStream *ost = ofilter->ost;
436 OutputFile *of = output_files[ost->file_index];
437 AVCodecContext *codec = ost->enc_ctx;
438 AVFilterContext *last_filter = out->filter_ctx;
439 int pad_idx = out->pad_idx;
440 char *sample_fmts, *sample_rates, *channel_layouts;
441 char name[255];
442 int ret;
443
444 snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
445 ret = avfilter_graph_create_filter(&ofilter->filter,
446 avfilter_get_by_name("abuffersink"),
447 name, NULL, NULL, fg->graph);
448 if (ret < 0)
449 return ret;
450 if ((ret = av_opt_set_int(ofilter->filter, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
451 return ret;
452
453#define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do { \
454 AVFilterContext *filt_ctx; \
455 \
456 av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
457 "similarly to -af " filter_name "=%s.\n", arg); \
458 \
459 ret = avfilter_graph_create_filter(&filt_ctx, \
460 avfilter_get_by_name(filter_name), \
461 filter_name, arg, NULL, fg->graph); \
462 if (ret < 0) \
463 return ret; \
464 \
465 ret = avfilter_link(last_filter, pad_idx, filt_ctx, 0); \
466 if (ret < 0) \
467 return ret; \
468 \
469 last_filter = filt_ctx; \
470 pad_idx = 0; \
471} while (0)
472 if (ost->audio_channels_mapped) {
473 int i;
474 AVBPrint pan_buf;
475 av_bprint_init(&pan_buf, 256, 8192);
476 av_bprintf(&pan_buf, "0x%"PRIx64,
477 av_get_default_channel_layout(ost->audio_channels_mapped));
478 for (i = 0; i < ost->audio_channels_mapped; i++)
479 if (ost->audio_channels_map[i] != -1)
480 av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
481
482 AUTO_INSERT_FILTER("-map_channel", "pan", pan_buf.str);
483 av_bprint_finalize(&pan_buf, NULL);
484 }
485
486 if (codec->channels && !codec->channel_layout)
487 codec->channel_layout = av_get_default_channel_layout(codec->channels);
488
489 sample_fmts = choose_sample_fmts(ost);
490 sample_rates = choose_sample_rates(ost);
491 channel_layouts = choose_channel_layouts(ost);
492 if (sample_fmts || sample_rates || channel_layouts) {
493 AVFilterContext *format;
494 char args[256];
495 args[0] = 0;
496
497 if (sample_fmts)
498 av_strlcatf(args, sizeof(args), "sample_fmts=%s:",
499 sample_fmts);
500 if (sample_rates)
501 av_strlcatf(args, sizeof(args), "sample_rates=%s:",
502 sample_rates);
503 if (channel_layouts)
504 av_strlcatf(args, sizeof(args), "channel_layouts=%s:",
505 channel_layouts);
506
507 av_freep(&sample_fmts);
508 av_freep(&sample_rates);
509 av_freep(&channel_layouts);
510
511 snprintf(name, sizeof(name), "audio format for output stream %d:%d",
512 ost->file_index, ost->index);
513 ret = avfilter_graph_create_filter(&format,
514 avfilter_get_by_name("aformat"),
515 name, args, NULL, fg->graph);
516 if (ret < 0)
517 return ret;
518
519 ret = avfilter_link(last_filter, pad_idx, format, 0);
520 if (ret < 0)
521 return ret;
522
523 last_filter = format;
524 pad_idx = 0;
525 }
526
527 if (audio_volume != 256 && 0) {
528 char args[256];
529
530 snprintf(args, sizeof(args), "%f", audio_volume / 256.);
531 AUTO_INSERT_FILTER("-vol", "volume", args);
532 }
533
534 if (ost->apad && of->shortest) {
535 char args[256];
536 int i;
537
538 for (i=0; i<of->ctx->nb_streams; i++)
539 if (of->ctx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO)
540 break;
541
542 if (i<of->ctx->nb_streams) {
543 snprintf(args, sizeof(args), "%s", ost->apad);
544 AUTO_INSERT_FILTER("-apad", "apad", args);
545 }
546 }
547
548 snprintf(name, sizeof(name), "trim for output stream %d:%d",
549 ost->file_index, ost->index);
550 ret = insert_trim(of->start_time, of->recording_time,
551 &last_filter, &pad_idx, name);
552 if (ret < 0)
553 return ret;
554
555 if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
556 return ret;
557
558 return 0;
559}
560
561#define DESCRIBE_FILTER_LINK(f, inout, in) \
562{ \
563 AVFilterContext *ctx = inout->filter_ctx; \
564 AVFilterPad *pads = in ? ctx->input_pads : ctx->output_pads; \
565 int nb_pads = in ? ctx->nb_inputs : ctx->nb_outputs; \
566 AVIOContext *pb; \
567 \
568 if (avio_open_dyn_buf(&pb) < 0) \
569 exit_program(1); \
570 \
571 avio_printf(pb, "%s", ctx->filter->name); \
572 if (nb_pads > 1) \
573 avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));\
574 avio_w8(pb, 0); \
575 avio_close_dyn_buf(pb, &f->name); \
576}
577
578int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
579{
580 av_freep(&ofilter->name);
581 DESCRIBE_FILTER_LINK(ofilter, out, 0);
582
583 switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
584 case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
585 case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
586 default: av_assert0(0);
587 }
588}
589
590static int sub2video_prepare(InputStream *ist)
591{
592 AVFormatContext *avf = input_files[ist->file_index]->ctx;
593 int i, w, h;
594
595 /* Compute the size of the canvas for the subtitles stream.
596 If the subtitles codec has set a size, use it. Otherwise use the
597 maximum dimensions of the video streams in the same file. */
598 w = ist->dec_ctx->width;
599 h = ist->dec_ctx->height;
600 if (!(w && h)) {
601 for (i = 0; i < avf->nb_streams; i++) {
602 if (avf->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
603 w = FFMAX(w, avf->streams[i]->codec->width);
604 h = FFMAX(h, avf->streams[i]->codec->height);
605 }
606 }
607 if (!(w && h)) {
608 w = FFMAX(w, 720);
609 h = FFMAX(h, 576);
610 }
611 av_log(avf, AV_LOG_INFO, "sub2video: using %dx%d canvas\n", w, h);
612 }
613 ist->sub2video.w = ist->dec_ctx->width = ist->resample_width = w;
614 ist->sub2video.h = ist->dec_ctx->height = ist->resample_height = h;
615
616 /* rectangles are AV_PIX_FMT_PAL8, but we have no guarantee that the
617 palettes for all rectangles are identical or compatible */
618 ist->resample_pix_fmt = ist->dec_ctx->pix_fmt = AV_PIX_FMT_RGB32;
619
620 ist->sub2video.frame = av_frame_alloc();
621 if (!ist->sub2video.frame)
622 return AVERROR(ENOMEM);
623 return 0;
624}
625
626static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
627 AVFilterInOut *in)
628{
629 AVFilterContext *last_filter;
630 const AVFilter *buffer_filt = avfilter_get_by_name("buffer");
631 InputStream *ist = ifilter->ist;
632 InputFile *f = input_files[ist->file_index];
633 AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
634 ist->st->time_base;
635 AVRational fr = ist->framerate;
636 AVRational sar;
637 AVBPrint args;
638 char name[255];
639 int ret, pad_idx = 0;
640
641 if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
642 av_log(NULL, AV_LOG_ERROR, "Cannot connect video filter to audio input\n");
643 return AVERROR(EINVAL);
644 }
645
646 if (!fr.num)
647 fr = av_guess_frame_rate(input_files[ist->file_index]->ctx, ist->st, NULL);
648
649 if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
650 ret = sub2video_prepare(ist);
651 if (ret < 0)
652 return ret;
653 }
654
655 sar = ist->st->sample_aspect_ratio.num ?
656 ist->st->sample_aspect_ratio :
657 ist->dec_ctx->sample_aspect_ratio;
658 if(!sar.den)
659 sar = (AVRational){0,1};
660 av_bprint_init(&args, 0, 1);
661 av_bprintf(&args,
662 "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:"
663 "pixel_aspect=%d/%d:sws_param=flags=%d", ist->resample_width,
664 ist->resample_height,
665 ist->hwaccel_retrieve_data ? ist->hwaccel_retrieved_pix_fmt : ist->resample_pix_fmt,
666 tb.num, tb.den, sar.num, sar.den,
667 SWS_BILINEAR + ((ist->dec_ctx->flags&CODEC_FLAG_BITEXACT) ? SWS_BITEXACT:0));
668 if (fr.num && fr.den)
669 av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
670 snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
671 ist->file_index, ist->st->index);
672
673 if ((ret = avfilter_graph_create_filter(&ifilter->filter, buffer_filt, name,
674 args.str, NULL, fg->graph)) < 0)
675 return ret;
676 last_filter = ifilter->filter;
677
678 if (ist->framerate.num) {
679 AVFilterContext *setpts;
680
681 snprintf(name, sizeof(name), "force CFR for input from stream %d:%d",
682 ist->file_index, ist->st->index);
683 if ((ret = avfilter_graph_create_filter(&setpts,
684 avfilter_get_by_name("setpts"),
685 name, "N", NULL,
686 fg->graph)) < 0)
687 return ret;
688
689 if ((ret = avfilter_link(last_filter, 0, setpts, 0)) < 0)
690 return ret;
691
692 last_filter = setpts;
693 }
694
695 if (do_deinterlace) {
696 AVFilterContext *yadif;
697
698 snprintf(name, sizeof(name), "deinterlace input from stream %d:%d",
699 ist->file_index, ist->st->index);
700 if ((ret = avfilter_graph_create_filter(&yadif,
701 avfilter_get_by_name("yadif"),
702 name, "", NULL,
703 fg->graph)) < 0)
704 return ret;
705
706 if ((ret = avfilter_link(last_filter, 0, yadif, 0)) < 0)
707 return ret;
708
709 last_filter = yadif;
710 }
711
712 snprintf(name, sizeof(name), "trim for input stream %d:%d",
713 ist->file_index, ist->st->index);
714 ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
715 AV_NOPTS_VALUE : 0, f->recording_time, &last_filter, &pad_idx, name);
716 if (ret < 0)
717 return ret;
718
719 if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
720 return ret;
721 return 0;
722}
723
724static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
725 AVFilterInOut *in)
726{
727 AVFilterContext *last_filter;
728 const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer");
729 InputStream *ist = ifilter->ist;
730 InputFile *f = input_files[ist->file_index];
731 AVBPrint args;
732 char name[255];
733 int ret, pad_idx = 0;
734
735 if (ist->dec_ctx->codec_type != AVMEDIA_TYPE_AUDIO) {
736 av_log(NULL, AV_LOG_ERROR, "Cannot connect audio filter to non audio input\n");
737 return AVERROR(EINVAL);
738 }
739
740 av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
741 av_bprintf(&args, "time_base=%d/%d:sample_rate=%d:sample_fmt=%s",
742 1, ist->dec_ctx->sample_rate,
743 ist->dec_ctx->sample_rate,
744 av_get_sample_fmt_name(ist->dec_ctx->sample_fmt));
745 if (ist->dec_ctx->channel_layout)
746 av_bprintf(&args, ":channel_layout=0x%"PRIx64,
747 ist->dec_ctx->channel_layout);
748 else
749 av_bprintf(&args, ":channels=%d", ist->dec_ctx->channels);
750 snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
751 ist->file_index, ist->st->index);
752
753 if ((ret = avfilter_graph_create_filter(&ifilter->filter, abuffer_filt,
754 name, args.str, NULL,
755 fg->graph)) < 0)
756 return ret;
757 last_filter = ifilter->filter;
758
759#define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg) do { \
760 AVFilterContext *filt_ctx; \
761 \
762 av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
763 "similarly to -af " filter_name "=%s.\n", arg); \
764 \
765 snprintf(name, sizeof(name), "graph %d %s for input stream %d:%d", \
766 fg->index, filter_name, ist->file_index, ist->st->index); \
767 ret = avfilter_graph_create_filter(&filt_ctx, \
768 avfilter_get_by_name(filter_name), \
769 name, arg, NULL, fg->graph); \
770 if (ret < 0) \
771 return ret; \
772 \
773 ret = avfilter_link(last_filter, 0, filt_ctx, 0); \
774 if (ret < 0) \
775 return ret; \
776 \
777 last_filter = filt_ctx; \
778} while (0)
779
780 if (audio_sync_method > 0) {
781 char args[256] = {0};
782
783 av_strlcatf(args, sizeof(args), "async=%d", audio_sync_method);
784 if (audio_drift_threshold != 0.1)
785 av_strlcatf(args, sizeof(args), ":min_hard_comp=%f", audio_drift_threshold);
786 if (!fg->reconfiguration)
787 av_strlcatf(args, sizeof(args), ":first_pts=0");
788 AUTO_INSERT_FILTER_INPUT("-async", "aresample", args);
789 }
790
791// if (ost->audio_channels_mapped) {
792// int i;
793// AVBPrint pan_buf;
794// av_bprint_init(&pan_buf, 256, 8192);
795// av_bprintf(&pan_buf, "0x%"PRIx64,
796// av_get_default_channel_layout(ost->audio_channels_mapped));
797// for (i = 0; i < ost->audio_channels_mapped; i++)
798// if (ost->audio_channels_map[i] != -1)
799// av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
800// AUTO_INSERT_FILTER_INPUT("-map_channel", "pan", pan_buf.str);
801// av_bprint_finalize(&pan_buf, NULL);
802// }
803
804 if (audio_volume != 256) {
805 char args[256];
806
807 av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume "
808 "audio filter instead.\n");
809
810 snprintf(args, sizeof(args), "%f", audio_volume / 256.);
811 AUTO_INSERT_FILTER_INPUT("-vol", "volume", args);
812 }
813
814 snprintf(name, sizeof(name), "trim for input stream %d:%d",
815 ist->file_index, ist->st->index);
816 ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
817 AV_NOPTS_VALUE : 0, f->recording_time, &last_filter, &pad_idx, name);
818 if (ret < 0)
819 return ret;
820
821 if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
822 return ret;
823
824 return 0;
825}
826
827static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
828 AVFilterInOut *in)
829{
830 av_freep(&ifilter->name);
831 DESCRIBE_FILTER_LINK(ifilter, in, 1);
832
833 if (!ifilter->ist->dec) {
834 av_log(NULL, AV_LOG_ERROR,
835 "No decoder for stream #%d:%d, filtering impossible\n",
836 ifilter->ist->file_index, ifilter->ist->st->index);
837 return AVERROR_DECODER_NOT_FOUND;
838 }
839 switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
840 case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
841 case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
842 default: av_assert0(0);
843 }
844}
845
846int configure_filtergraph(FilterGraph *fg)
847{
848 AVFilterInOut *inputs, *outputs, *cur;
849 int ret, i, init = !fg->graph, simple = !fg->graph_desc;
850 const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
851 fg->graph_desc;
852
853 avfilter_graph_free(&fg->graph);
854 if (!(fg->graph = avfilter_graph_alloc()))
855 return AVERROR(ENOMEM);
856
857 if (simple) {
858 OutputStream *ost = fg->outputs[0]->ost;
859 char args[512];
860 AVDictionaryEntry *e = NULL;
861
862 snprintf(args, sizeof(args), "flags=0x%X", (unsigned)ost->sws_flags);
863 fg->graph->scale_sws_opts = av_strdup(args);
864
865 args[0] = 0;
866 while ((e = av_dict_get(ost->swr_opts, "", e,
867 AV_DICT_IGNORE_SUFFIX))) {
868 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
869 }
870 if (strlen(args))
871 args[strlen(args)-1] = 0;
872 av_opt_set(fg->graph, "aresample_swr_opts", args, 0);
873
874 args[0] = '\0';
875 while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e,
876 AV_DICT_IGNORE_SUFFIX))) {
877 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
878 }
879 if (strlen(args))
880 args[strlen(args) - 1] = '\0';
881 fg->graph->resample_lavr_opts = av_strdup(args);
882
883 e = av_dict_get(ost->encoder_opts, "threads", NULL, 0);
884 if (e)
885 av_opt_set(fg->graph, "threads", e->value, 0);
886 }
887
888 if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
889 return ret;
890
891 if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
892 av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' does not have "
893 "exactly one input and output.\n", graph_desc);
894 return AVERROR(EINVAL);
895 }
896
897 for (cur = inputs; !simple && init && cur; cur = cur->next)
898 init_input_filter(fg, cur);
899
900 for (cur = inputs, i = 0; cur; cur = cur->next, i++)
901 if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0) {
902 avfilter_inout_free(&inputs);
903 avfilter_inout_free(&outputs);
904 return ret;
905 }
906 avfilter_inout_free(&inputs);
907
908 if (!init || simple) {
909 /* we already know the mappings between lavfi outputs and output streams,
910 * so we can finish the setup */
911 for (cur = outputs, i = 0; cur; cur = cur->next, i++)
912 configure_output_filter(fg, fg->outputs[i], cur);
913 avfilter_inout_free(&outputs);
914
915 if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
916 return ret;
917 } else {
918 /* wait until output mappings are processed */
919 for (cur = outputs; cur;) {
920 GROW_ARRAY(fg->outputs, fg->nb_outputs);
921 if (!(fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]))))
922 exit_program(1);
923 fg->outputs[fg->nb_outputs - 1]->graph = fg;
924 fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
925 cur = cur->next;
926 fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
927 }
928 }
929
930 fg->reconfiguration = 1;
931
932 for (i = 0; i < fg->nb_outputs; i++) {
933 OutputStream *ost = fg->outputs[i]->ost;
934 if (ost &&
935 ost->enc->type == AVMEDIA_TYPE_AUDIO &&
936 !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
937 av_buffersink_set_frame_size(ost->filter->filter,
938 ost->enc_ctx->frame_size);
939 }
940
941 return 0;
942}
943
944int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
945{
946 int i;
947 for (i = 0; i < fg->nb_inputs; i++)
948 if (fg->inputs[i]->ist == ist)
949 return 1;
950 return 0;
951}
952
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