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Imported Debian version 2.5.0~trusty1.1
[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,
f6fa7814
DM		 386 avfilter_get_by_name("format"),
387 "format", pix_fmts, NULL, fg->graph);
2ba45a60
DM		 388 av_freep(&pix_fmts);
389 if (ret < 0)
390 return ret;
391 if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
392 return ret;
393
394 last_filter = filter;
395 pad_idx = 0;
396 }
397
398 if (ost->frame_rate.num && 0) {
399 AVFilterContext *fps;
400 char args[255];
401
402 snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
403 ost->frame_rate.den);
404 snprintf(name, sizeof(name), "fps for output stream %d:%d",
405 ost->file_index, ost->index);
406 ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
407 name, args, NULL, fg->graph);
408 if (ret < 0)
409 return ret;
410
411 ret = avfilter_link(last_filter, pad_idx, fps, 0);
412 if (ret < 0)
413 return ret;
414 last_filter = fps;
415 pad_idx = 0;
416 }
417
418 snprintf(name, sizeof(name), "trim for output stream %d:%d",
419 ost->file_index, ost->index);
420 ret = insert_trim(of->start_time, of->recording_time,
421 &last_filter, &pad_idx, name);
422 if (ret < 0)
423 return ret;
424
425
426 if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
427 return ret;
428
429 return 0;
430}
431
432static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
433{
434 OutputStream *ost = ofilter->ost;
435 OutputFile *of = output_files[ost->file_index];
436 AVCodecContext *codec = ost->enc_ctx;
437 AVFilterContext *last_filter = out->filter_ctx;
438 int pad_idx = out->pad_idx;
439 char *sample_fmts, *sample_rates, *channel_layouts;
440 char name[255];
441 int ret;
442
443 snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
444 ret = avfilter_graph_create_filter(&ofilter->filter,
445 avfilter_get_by_name("abuffersink"),
446 name, NULL, NULL, fg->graph);
447 if (ret < 0)
448 return ret;
449 if ((ret = av_opt_set_int(ofilter->filter, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
450 return ret;
451
452#define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do { \
453 AVFilterContext *filt_ctx; \
454 \
455 av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
456 "similarly to -af " filter_name "=%s.\n", arg); \
457 \
458 ret = avfilter_graph_create_filter(&filt_ctx, \
459 avfilter_get_by_name(filter_name), \
460 filter_name, arg, NULL, fg->graph); \
461 if (ret < 0) \
462 return ret; \
463 \
464 ret = avfilter_link(last_filter, pad_idx, filt_ctx, 0); \
465 if (ret < 0) \
466 return ret; \
467 \
468 last_filter = filt_ctx; \
469 pad_idx = 0; \
470} while (0)
471 if (ost->audio_channels_mapped) {
472 int i;
473 AVBPrint pan_buf;
474 av_bprint_init(&pan_buf, 256, 8192);
475 av_bprintf(&pan_buf, "0x%"PRIx64,
476 av_get_default_channel_layout(ost->audio_channels_mapped));
477 for (i = 0; i < ost->audio_channels_mapped; i++)
478 if (ost->audio_channels_map[i] != -1)
479 av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
480
481 AUTO_INSERT_FILTER("-map_channel", "pan", pan_buf.str);
482 av_bprint_finalize(&pan_buf, NULL);
483 }
484
485 if (codec->channels && !codec->channel_layout)
486 codec->channel_layout = av_get_default_channel_layout(codec->channels);
487
488 sample_fmts = choose_sample_fmts(ost);
489 sample_rates = choose_sample_rates(ost);
490 channel_layouts = choose_channel_layouts(ost);
491 if (sample_fmts || sample_rates || channel_layouts) {
492 AVFilterContext *format;
493 char args[256];
494 args[0] = 0;
495
496 if (sample_fmts)
497 av_strlcatf(args, sizeof(args), "sample_fmts=%s:",
498 sample_fmts);
499 if (sample_rates)
500 av_strlcatf(args, sizeof(args), "sample_rates=%s:",
501 sample_rates);
502 if (channel_layouts)
503 av_strlcatf(args, sizeof(args), "channel_layouts=%s:",
504 channel_layouts);
505
506 av_freep(&sample_fmts);
507 av_freep(&sample_rates);
508 av_freep(&channel_layouts);
509
510 snprintf(name, sizeof(name), "audio format for output stream %d:%d",
511 ost->file_index, ost->index);
512 ret = avfilter_graph_create_filter(&format,
513 avfilter_get_by_name("aformat"),
514 name, args, NULL, fg->graph);
515 if (ret < 0)
516 return ret;
517
518 ret = avfilter_link(last_filter, pad_idx, format, 0);
519 if (ret < 0)
520 return ret;
521
522 last_filter = format;
523 pad_idx = 0;
524 }
525
526 if (audio_volume != 256 && 0) {
527 char args[256];
528
529 snprintf(args, sizeof(args), "%f", audio_volume / 256.);
530 AUTO_INSERT_FILTER("-vol", "volume", args);
531 }
532
533 if (ost->apad && of->shortest) {
534 char args[256];
535 int i;
536
537 for (i=0; i<of->ctx->nb_streams; i++)
538 if (of->ctx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO)
539 break;
540
541 if (i<of->ctx->nb_streams) {
542 snprintf(args, sizeof(args), "%s", ost->apad);
543 AUTO_INSERT_FILTER("-apad", "apad", args);
544 }
545 }
546
547 snprintf(name, sizeof(name), "trim for output stream %d:%d",
548 ost->file_index, ost->index);
549 ret = insert_trim(of->start_time, of->recording_time,
550 &last_filter, &pad_idx, name);
551 if (ret < 0)
552 return ret;
553
554 if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
555 return ret;
556
557 return 0;
558}
559
560#define DESCRIBE_FILTER_LINK(f, inout, in) \
561{ \
562 AVFilterContext *ctx = inout->filter_ctx; \
563 AVFilterPad *pads = in ? ctx->input_pads : ctx->output_pads; \
564 int nb_pads = in ? ctx->nb_inputs : ctx->nb_outputs; \
565 AVIOContext *pb; \
566 \
567 if (avio_open_dyn_buf(&pb) < 0) \
568 exit_program(1); \
569 \
570 avio_printf(pb, "%s", ctx->filter->name); \
571 if (nb_pads > 1) \
572 avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));\
573 avio_w8(pb, 0); \
574 avio_close_dyn_buf(pb, &f->name); \
575}
576
577int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
578{
579 av_freep(&ofilter->name);
580 DESCRIBE_FILTER_LINK(ofilter, out, 0);
581
582 switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
583 case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
584 case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
585 default: av_assert0(0);
586 }
587}
588
589static int sub2video_prepare(InputStream *ist)
590{
591 AVFormatContext *avf = input_files[ist->file_index]->ctx;
592 int i, w, h;
593
594 /* Compute the size of the canvas for the subtitles stream.
595 If the subtitles codec has set a size, use it. Otherwise use the
596 maximum dimensions of the video streams in the same file. */
597 w = ist->dec_ctx->width;
598 h = ist->dec_ctx->height;
599 if (!(w && h)) {
600 for (i = 0; i < avf->nb_streams; i++) {
601 if (avf->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
602 w = FFMAX(w, avf->streams[i]->codec->width);
603 h = FFMAX(h, avf->streams[i]->codec->height);
604 }
605 }
606 if (!(w && h)) {
607 w = FFMAX(w, 720);
608 h = FFMAX(h, 576);
609 }
610 av_log(avf, AV_LOG_INFO, "sub2video: using %dx%d canvas\n", w, h);
611 }
612 ist->sub2video.w = ist->dec_ctx->width = ist->resample_width = w;
613 ist->sub2video.h = ist->dec_ctx->height = ist->resample_height = h;
614
615 /* rectangles are AV_PIX_FMT_PAL8, but we have no guarantee that the
616 palettes for all rectangles are identical or compatible */
617 ist->resample_pix_fmt = ist->dec_ctx->pix_fmt = AV_PIX_FMT_RGB32;
618
619 ist->sub2video.frame = av_frame_alloc();
620 if (!ist->sub2video.frame)
621 return AVERROR(ENOMEM);
f6fa7814 622 ist->sub2video.last_pts = INT64_MIN;
2ba45a60
DM		 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;
f6fa7814 640 int64_t tsoffset = 0;
2ba45a60
DM		 641
642 if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
643 av_log(NULL, AV_LOG_ERROR, "Cannot connect video filter to audio input\n");
644 return AVERROR(EINVAL);
645 }
646
647 if (!fr.num)
648 fr = av_guess_frame_rate(input_files[ist->file_index]->ctx, ist->st, NULL);
649
650 if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
651 ret = sub2video_prepare(ist);
652 if (ret < 0)
653 return ret;
654 }
655
656 sar = ist->st->sample_aspect_ratio.num ?
657 ist->st->sample_aspect_ratio :
658 ist->dec_ctx->sample_aspect_ratio;
659 if(!sar.den)
660 sar = (AVRational){0,1};
661 av_bprint_init(&args, 0, 1);
662 av_bprintf(&args,
663 "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:"
664 "pixel_aspect=%d/%d:sws_param=flags=%d", ist->resample_width,
665 ist->resample_height,
666 ist->hwaccel_retrieve_data ? ist->hwaccel_retrieved_pix_fmt : ist->resample_pix_fmt,
667 tb.num, tb.den, sar.num, sar.den,
668 SWS_BILINEAR + ((ist->dec_ctx->flags&CODEC_FLAG_BITEXACT) ? SWS_BITEXACT:0));
669 if (fr.num && fr.den)
670 av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
671 snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
672 ist->file_index, ist->st->index);
673
674 if ((ret = avfilter_graph_create_filter(&ifilter->filter, buffer_filt, name,
675 args.str, NULL, fg->graph)) < 0)
676 return ret;
677 last_filter = ifilter->filter;
678
679 if (ist->framerate.num) {
680 AVFilterContext *setpts;
681
682 snprintf(name, sizeof(name), "force CFR for input from stream %d:%d",
683 ist->file_index, ist->st->index);
684 if ((ret = avfilter_graph_create_filter(&setpts,
685 avfilter_get_by_name("setpts"),
686 name, "N", NULL,
687 fg->graph)) < 0)
688 return ret;
689
690 if ((ret = avfilter_link(last_filter, 0, setpts, 0)) < 0)
691 return ret;
692
693 last_filter = setpts;
694 }
695
696 if (do_deinterlace) {
697 AVFilterContext *yadif;
698
699 snprintf(name, sizeof(name), "deinterlace input from stream %d:%d",
700 ist->file_index, ist->st->index);
701 if ((ret = avfilter_graph_create_filter(&yadif,
702 avfilter_get_by_name("yadif"),
703 name, "", NULL,
704 fg->graph)) < 0)
705 return ret;
706
707 if ((ret = avfilter_link(last_filter, 0, yadif, 0)) < 0)
708 return ret;
709
710 last_filter = yadif;
711 }
712
713 snprintf(name, sizeof(name), "trim for input stream %d:%d",
714 ist->file_index, ist->st->index);
f6fa7814
DM		 715 if (copy_ts) {
716 tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
717 if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
718 tsoffset += f->ctx->start_time;
719 }
2ba45a60 720 ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
f6fa7814
DM		 721 AV_NOPTS_VALUE : tsoffset, f->recording_time,
722 &last_filter, &pad_idx, name);
2ba45a60
DM		 723 if (ret < 0)
724 return ret;
725
726 if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
727 return ret;
728 return 0;
729}
730
731static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
732 AVFilterInOut *in)
733{
734 AVFilterContext *last_filter;
735 const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer");
736 InputStream *ist = ifilter->ist;
737 InputFile *f = input_files[ist->file_index];
738 AVBPrint args;
739 char name[255];
740 int ret, pad_idx = 0;
f6fa7814 741 int64_t tsoffset = 0;
2ba45a60
DM		 742
743 if (ist->dec_ctx->codec_type != AVMEDIA_TYPE_AUDIO) {
744 av_log(NULL, AV_LOG_ERROR, "Cannot connect audio filter to non audio input\n");
745 return AVERROR(EINVAL);
746 }
747
748 av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
749 av_bprintf(&args, "time_base=%d/%d:sample_rate=%d:sample_fmt=%s",
750 1, ist->dec_ctx->sample_rate,
751 ist->dec_ctx->sample_rate,
752 av_get_sample_fmt_name(ist->dec_ctx->sample_fmt));
753 if (ist->dec_ctx->channel_layout)
754 av_bprintf(&args, ":channel_layout=0x%"PRIx64,
755 ist->dec_ctx->channel_layout);
756 else
757 av_bprintf(&args, ":channels=%d", ist->dec_ctx->channels);
758 snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
759 ist->file_index, ist->st->index);
760
761 if ((ret = avfilter_graph_create_filter(&ifilter->filter, abuffer_filt,
762 name, args.str, NULL,
763 fg->graph)) < 0)
764 return ret;
765 last_filter = ifilter->filter;
766
767#define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg) do { \
768 AVFilterContext *filt_ctx; \
769 \
770 av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
771 "similarly to -af " filter_name "=%s.\n", arg); \
772 \
773 snprintf(name, sizeof(name), "graph %d %s for input stream %d:%d", \
774 fg->index, filter_name, ist->file_index, ist->st->index); \
775 ret = avfilter_graph_create_filter(&filt_ctx, \
776 avfilter_get_by_name(filter_name), \
777 name, arg, NULL, fg->graph); \
778 if (ret < 0) \
779 return ret; \
780 \
781 ret = avfilter_link(last_filter, 0, filt_ctx, 0); \
782 if (ret < 0) \
783 return ret; \
784 \
785 last_filter = filt_ctx; \
786} while (0)
787
788 if (audio_sync_method > 0) {
789 char args[256] = {0};
790
791 av_strlcatf(args, sizeof(args), "async=%d", audio_sync_method);
792 if (audio_drift_threshold != 0.1)
793 av_strlcatf(args, sizeof(args), ":min_hard_comp=%f", audio_drift_threshold);
794 if (!fg->reconfiguration)
795 av_strlcatf(args, sizeof(args), ":first_pts=0");
796 AUTO_INSERT_FILTER_INPUT("-async", "aresample", args);
797 }
798
799// if (ost->audio_channels_mapped) {
800// int i;
801// AVBPrint pan_buf;
802// av_bprint_init(&pan_buf, 256, 8192);
803// av_bprintf(&pan_buf, "0x%"PRIx64,
804// av_get_default_channel_layout(ost->audio_channels_mapped));
805// for (i = 0; i < ost->audio_channels_mapped; i++)
806// if (ost->audio_channels_map[i] != -1)
807// av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
808// AUTO_INSERT_FILTER_INPUT("-map_channel", "pan", pan_buf.str);
809// av_bprint_finalize(&pan_buf, NULL);
810// }
811
812 if (audio_volume != 256) {
813 char args[256];
814
815 av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume "
816 "audio filter instead.\n");
817
818 snprintf(args, sizeof(args), "%f", audio_volume / 256.);
819 AUTO_INSERT_FILTER_INPUT("-vol", "volume", args);
820 }
821
822 snprintf(name, sizeof(name), "trim for input stream %d:%d",
823 ist->file_index, ist->st->index);
f6fa7814
DM		 824 if (copy_ts) {
825 tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
826 if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
827 tsoffset += f->ctx->start_time;
828 }
2ba45a60 829 ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
f6fa7814
DM		 830 AV_NOPTS_VALUE : tsoffset, f->recording_time,
831 &last_filter, &pad_idx, name);
2ba45a60
DM		 832 if (ret < 0)
833 return ret;
834
835 if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
836 return ret;
837
838 return 0;
839}
840
841static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
842 AVFilterInOut *in)
843{
844 av_freep(&ifilter->name);
845 DESCRIBE_FILTER_LINK(ifilter, in, 1);
846
847 if (!ifilter->ist->dec) {
848 av_log(NULL, AV_LOG_ERROR,
849 "No decoder for stream #%d:%d, filtering impossible\n",
850 ifilter->ist->file_index, ifilter->ist->st->index);
851 return AVERROR_DECODER_NOT_FOUND;
852 }
853 switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
854 case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
855 case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
856 default: av_assert0(0);
857 }
858}
859
860int configure_filtergraph(FilterGraph *fg)
861{
862 AVFilterInOut *inputs, *outputs, *cur;
863 int ret, i, init = !fg->graph, simple = !fg->graph_desc;
864 const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
865 fg->graph_desc;
866
867 avfilter_graph_free(&fg->graph);
868 if (!(fg->graph = avfilter_graph_alloc()))
869 return AVERROR(ENOMEM);
870
871 if (simple) {
872 OutputStream *ost = fg->outputs[0]->ost;
873 char args[512];
874 AVDictionaryEntry *e = NULL;
875
876 snprintf(args, sizeof(args), "flags=0x%X", (unsigned)ost->sws_flags);
877 fg->graph->scale_sws_opts = av_strdup(args);
878
879 args[0] = 0;
880 while ((e = av_dict_get(ost->swr_opts, "", e,
881 AV_DICT_IGNORE_SUFFIX))) {
882 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
883 }
884 if (strlen(args))
885 args[strlen(args)-1] = 0;
886 av_opt_set(fg->graph, "aresample_swr_opts", args, 0);
887
888 args[0] = '\0';
889 while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e,
890 AV_DICT_IGNORE_SUFFIX))) {
891 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
892 }
893 if (strlen(args))
894 args[strlen(args) - 1] = '\0';
895 fg->graph->resample_lavr_opts = av_strdup(args);
896
897 e = av_dict_get(ost->encoder_opts, "threads", NULL, 0);
898 if (e)
899 av_opt_set(fg->graph, "threads", e->value, 0);
900 }
901
902 if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
903 return ret;
904
905 if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
906 av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' does not have "
907 "exactly one input and output.\n", graph_desc);
908 return AVERROR(EINVAL);
909 }
910
911 for (cur = inputs; !simple && init && cur; cur = cur->next)
912 init_input_filter(fg, cur);
913
914 for (cur = inputs, i = 0; cur; cur = cur->next, i++)
915 if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0) {
916 avfilter_inout_free(&inputs);
917 avfilter_inout_free(&outputs);
918 return ret;
919 }
920 avfilter_inout_free(&inputs);
921
922 if (!init || simple) {
923 /* we already know the mappings between lavfi outputs and output streams,
924 * so we can finish the setup */
925 for (cur = outputs, i = 0; cur; cur = cur->next, i++)
926 configure_output_filter(fg, fg->outputs[i], cur);
927 avfilter_inout_free(&outputs);
928
929 if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
930 return ret;
931 } else {
932 /* wait until output mappings are processed */
933 for (cur = outputs; cur;) {
934 GROW_ARRAY(fg->outputs, fg->nb_outputs);
935 if (!(fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]))))
936 exit_program(1);
937 fg->outputs[fg->nb_outputs - 1]->graph = fg;
938 fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
939 cur = cur->next;
940 fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
941 }
942 }
943
944 fg->reconfiguration = 1;
945
946 for (i = 0; i < fg->nb_outputs; i++) {
947 OutputStream *ost = fg->outputs[i]->ost;
948 if (ost &&
949 ost->enc->type == AVMEDIA_TYPE_AUDIO &&
950 !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
951 av_buffersink_set_frame_size(ost->filter->filter,
952 ost->enc_ctx->frame_size);
953 }
954
955 return 0;
956}
957
958int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
959{
960 int i;
961 for (i = 0; i < fg->nb_inputs; i++)
962 if (fg->inputs[i]->ist == ist)
963 return 1;
964 return 0;
965}
966
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