avfilter: add nb_threads to AVFilterContext
[ffmpeg.git] / ffmpeg_filter.c
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 #include "libavfilter/buffersrc.h"
28
29 #include "libavresample/avresample.h"
30
31 #include "libavutil/avassert.h"
32 #include "libavutil/avstring.h"
33 #include "libavutil/bprint.h"
34 #include "libavutil/channel_layout.h"
35 #include "libavutil/display.h"
36 #include "libavutil/opt.h"
37 #include "libavutil/pixdesc.h"
38 #include "libavutil/pixfmt.h"
39 #include "libavutil/imgutils.h"
40 #include "libavutil/samplefmt.h"
41
42 static const enum AVPixelFormat *get_compliance_unofficial_pix_fmts(enum AVCodecID codec_id, const enum AVPixelFormat default_formats[])
43 {
44     static const enum AVPixelFormat mjpeg_formats[] =
45         { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P,
46           AV_PIX_FMT_YUV420P,  AV_PIX_FMT_YUV422P,  AV_PIX_FMT_YUV444P,
47           AV_PIX_FMT_NONE };
48     static const enum AVPixelFormat ljpeg_formats[] =
49         { AV_PIX_FMT_BGR24   , AV_PIX_FMT_BGRA    , AV_PIX_FMT_BGR0,
50           AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P,
51           AV_PIX_FMT_YUV420P , AV_PIX_FMT_YUV444P , AV_PIX_FMT_YUV422P,
52           AV_PIX_FMT_NONE};
53
54     if (codec_id == AV_CODEC_ID_MJPEG) {
55         return mjpeg_formats;
56     } else if (codec_id == AV_CODEC_ID_LJPEG) {
57         return ljpeg_formats;
58     } else {
59         return default_formats;
60     }
61 }
62
63 enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodecContext *enc_ctx, AVCodec *codec, enum AVPixelFormat target)
64 {
65     if (codec && codec->pix_fmts) {
66         const enum AVPixelFormat *p = codec->pix_fmts;
67         const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(target);
68         int has_alpha = desc ? desc->nb_components % 2 == 0 : 0;
69         enum AVPixelFormat best= AV_PIX_FMT_NONE;
70
71         if (enc_ctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
72             p = get_compliance_unofficial_pix_fmts(enc_ctx->codec_id, p);
73         }
74         for (; *p != AV_PIX_FMT_NONE; p++) {
75             best= avcodec_find_best_pix_fmt_of_2(best, *p, target, has_alpha, NULL);
76             if (*p == target)
77                 break;
78         }
79         if (*p == AV_PIX_FMT_NONE) {
80             if (target != AV_PIX_FMT_NONE)
81                 av_log(NULL, AV_LOG_WARNING,
82                        "Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
83                        av_get_pix_fmt_name(target),
84                        codec->name,
85                        av_get_pix_fmt_name(best));
86             return best;
87         }
88     }
89     return target;
90 }
91
92 void choose_sample_fmt(AVStream *st, AVCodec *codec)
93 {
94     if (codec && codec->sample_fmts) {
95         const enum AVSampleFormat *p = codec->sample_fmts;
96         for (; *p != -1; p++) {
97             if (*p == st->codec->sample_fmt)
98                 break;
99         }
100         if (*p == -1) {
101             if((codec->capabilities & AV_CODEC_CAP_LOSSLESS) && av_get_sample_fmt_name(st->codec->sample_fmt) > av_get_sample_fmt_name(codec->sample_fmts[0]))
102                 av_log(NULL, AV_LOG_ERROR, "Conversion will not be lossless.\n");
103             if(av_get_sample_fmt_name(st->codec->sample_fmt))
104             av_log(NULL, AV_LOG_WARNING,
105                    "Incompatible sample format '%s' for codec '%s', auto-selecting format '%s'\n",
106                    av_get_sample_fmt_name(st->codec->sample_fmt),
107                    codec->name,
108                    av_get_sample_fmt_name(codec->sample_fmts[0]));
109             st->codec->sample_fmt = codec->sample_fmts[0];
110         }
111     }
112 }
113
114 static char *choose_pix_fmts(OutputStream *ost)
115 {
116     AVDictionaryEntry *strict_dict = av_dict_get(ost->encoder_opts, "strict", NULL, 0);
117     if (strict_dict)
118         // used by choose_pixel_fmt() and below
119         av_opt_set(ost->enc_ctx, "strict", strict_dict->value, 0);
120
121      if (ost->keep_pix_fmt) {
122         if (ost->filter)
123             avfilter_graph_set_auto_convert(ost->filter->graph->graph,
124                                             AVFILTER_AUTO_CONVERT_NONE);
125         if (ost->enc_ctx->pix_fmt == AV_PIX_FMT_NONE)
126             return NULL;
127         return av_strdup(av_get_pix_fmt_name(ost->enc_ctx->pix_fmt));
128     }
129     if (ost->enc_ctx->pix_fmt != AV_PIX_FMT_NONE) {
130         return av_strdup(av_get_pix_fmt_name(choose_pixel_fmt(ost->st, ost->enc_ctx, ost->enc, ost->enc_ctx->pix_fmt)));
131     } else if (ost->enc && ost->enc->pix_fmts) {
132         const enum AVPixelFormat *p;
133         AVIOContext *s = NULL;
134         uint8_t *ret;
135         int len;
136
137         if (avio_open_dyn_buf(&s) < 0)
138             exit_program(1);
139
140         p = ost->enc->pix_fmts;
141         if (ost->enc_ctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
142             p = get_compliance_unofficial_pix_fmts(ost->enc_ctx->codec_id, p);
143         }
144
145         for (; *p != AV_PIX_FMT_NONE; p++) {
146             const char *name = av_get_pix_fmt_name(*p);
147             avio_printf(s, "%s|", name);
148         }
149         len = avio_close_dyn_buf(s, &ret);
150         ret[len - 1] = 0;
151         return ret;
152     } else
153         return NULL;
154 }
155
156 /* Define a function for building a string containing a list of
157  * allowed formats. */
158 #define DEF_CHOOSE_FORMAT(type, var, supported_list, none, get_name)           \
159 static char *choose_ ## var ## s(OutputStream *ost)                            \
160 {                                                                              \
161     if (ost->enc_ctx->var != none) {                                           \
162         get_name(ost->enc_ctx->var);                                           \
163         return av_strdup(name);                                                \
164     } else if (ost->enc && ost->enc->supported_list) {                         \
165         const type *p;                                                         \
166         AVIOContext *s = NULL;                                                 \
167         uint8_t *ret;                                                          \
168         int len;                                                               \
169                                                                                \
170         if (avio_open_dyn_buf(&s) < 0)                                         \
171             exit_program(1);                                                           \
172                                                                                \
173         for (p = ost->enc->supported_list; *p != none; p++) {                  \
174             get_name(*p);                                                      \
175             avio_printf(s, "%s|", name);                                       \
176         }                                                                      \
177         len = avio_close_dyn_buf(s, &ret);                                     \
178         ret[len - 1] = 0;                                                      \
179         return ret;                                                            \
180     } else                                                                     \
181         return NULL;                                                           \
182 }
183
184 // DEF_CHOOSE_FORMAT(enum AVPixelFormat, pix_fmt, pix_fmts, AV_PIX_FMT_NONE,
185 //                   GET_PIX_FMT_NAME)
186
187 DEF_CHOOSE_FORMAT(enum AVSampleFormat, sample_fmt, sample_fmts,
188                   AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME)
189
190 DEF_CHOOSE_FORMAT(int, sample_rate, supported_samplerates, 0,
191                   GET_SAMPLE_RATE_NAME)
192
193 DEF_CHOOSE_FORMAT(uint64_t, channel_layout, channel_layouts, 0,
194                   GET_CH_LAYOUT_NAME)
195
196 int init_simple_filtergraph(InputStream *ist, OutputStream *ost)
197 {
198     FilterGraph *fg = av_mallocz(sizeof(*fg));
199
200     if (!fg)
201         exit_program(1);
202     fg->index = nb_filtergraphs;
203
204     GROW_ARRAY(fg->outputs, fg->nb_outputs);
205     if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
206         exit_program(1);
207     fg->outputs[0]->ost   = ost;
208     fg->outputs[0]->graph = fg;
209
210     ost->filter = fg->outputs[0];
211
212     GROW_ARRAY(fg->inputs, fg->nb_inputs);
213     if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
214         exit_program(1);
215     fg->inputs[0]->ist   = ist;
216     fg->inputs[0]->graph = fg;
217
218     GROW_ARRAY(ist->filters, ist->nb_filters);
219     ist->filters[ist->nb_filters - 1] = fg->inputs[0];
220
221     GROW_ARRAY(filtergraphs, nb_filtergraphs);
222     filtergraphs[nb_filtergraphs - 1] = fg;
223
224     return 0;
225 }
226
227 static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
228 {
229     InputStream *ist = NULL;
230     enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
231     int i;
232
233     // TODO: support other filter types
234     if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
235         av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
236                "currently.\n");
237         exit_program(1);
238     }
239
240     if (in->name) {
241         AVFormatContext *s;
242         AVStream       *st = NULL;
243         char *p;
244         int file_idx = strtol(in->name, &p, 0);
245
246         if (file_idx < 0 || file_idx >= nb_input_files) {
247             av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtergraph description %s.\n",
248                    file_idx, fg->graph_desc);
249             exit_program(1);
250         }
251         s = input_files[file_idx]->ctx;
252
253         for (i = 0; i < s->nb_streams; i++) {
254             enum AVMediaType stream_type = s->streams[i]->codec->codec_type;
255             if (stream_type != type &&
256                 !(stream_type == AVMEDIA_TYPE_SUBTITLE &&
257                   type == AVMEDIA_TYPE_VIDEO /* sub2video hack */))
258                 continue;
259             if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
260                 st = s->streams[i];
261                 break;
262             }
263         }
264         if (!st) {
265             av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
266                    "matches no streams.\n", p, fg->graph_desc);
267             exit_program(1);
268         }
269         ist = input_streams[input_files[file_idx]->ist_index + st->index];
270     } else {
271         /* find the first unused stream of corresponding type */
272         for (i = 0; i < nb_input_streams; i++) {
273             ist = input_streams[i];
274             if (ist->dec_ctx->codec_type == type && ist->discard)
275                 break;
276         }
277         if (i == nb_input_streams) {
278             av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
279                    "unlabeled input pad %d on filter %s\n", in->pad_idx,
280                    in->filter_ctx->name);
281             exit_program(1);
282         }
283     }
284     av_assert0(ist);
285
286     ist->discard         = 0;
287     ist->decoding_needed |= DECODING_FOR_FILTER;
288     ist->st->discard = AVDISCARD_NONE;
289
290     GROW_ARRAY(fg->inputs, fg->nb_inputs);
291     if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
292         exit_program(1);
293     fg->inputs[fg->nb_inputs - 1]->ist   = ist;
294     fg->inputs[fg->nb_inputs - 1]->graph = fg;
295
296     GROW_ARRAY(ist->filters, ist->nb_filters);
297     ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
298 }
299
300 int init_complex_filtergraph(FilterGraph *fg)
301 {
302     AVFilterInOut *inputs, *outputs, *cur;
303     AVFilterGraph *graph;
304     int ret = 0;
305
306     /* this graph is only used for determining the kinds of inputs
307      * and outputs we have, and is discarded on exit from this function */
308     graph = avfilter_graph_alloc();
309     if (!graph)
310         return AVERROR(ENOMEM);
311
312     ret = avfilter_graph_parse2(graph, fg->graph_desc, &inputs, &outputs);
313     if (ret < 0)
314         goto fail;
315
316     for (cur = inputs; cur; cur = cur->next)
317         init_input_filter(fg, cur);
318
319     for (cur = outputs; cur;) {
320         GROW_ARRAY(fg->outputs, fg->nb_outputs);
321         fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]));
322         if (!fg->outputs[fg->nb_outputs - 1])
323             exit_program(1);
324
325         fg->outputs[fg->nb_outputs - 1]->graph   = fg;
326         fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
327         fg->outputs[fg->nb_outputs - 1]->type    = avfilter_pad_get_type(cur->filter_ctx->output_pads,
328                                                                          cur->pad_idx);
329         cur = cur->next;
330         fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
331     }
332
333 fail:
334     avfilter_inout_free(&inputs);
335     avfilter_graph_free(&graph);
336     return ret;
337 }
338
339 static int insert_trim(int64_t start_time, int64_t duration,
340                        AVFilterContext **last_filter, int *pad_idx,
341                        const char *filter_name)
342 {
343     AVFilterGraph *graph = (*last_filter)->graph;
344     AVFilterContext *ctx;
345     const AVFilter *trim;
346     enum AVMediaType type = avfilter_pad_get_type((*last_filter)->output_pads, *pad_idx);
347     const char *name = (type == AVMEDIA_TYPE_VIDEO) ? "trim" : "atrim";
348     int ret = 0;
349
350     if (duration == INT64_MAX && start_time == AV_NOPTS_VALUE)
351         return 0;
352
353     trim = avfilter_get_by_name(name);
354     if (!trim) {
355         av_log(NULL, AV_LOG_ERROR, "%s filter not present, cannot limit "
356                "recording time.\n", name);
357         return AVERROR_FILTER_NOT_FOUND;
358     }
359
360     ctx = avfilter_graph_alloc_filter(graph, trim, filter_name);
361     if (!ctx)
362         return AVERROR(ENOMEM);
363
364     if (duration != INT64_MAX) {
365         ret = av_opt_set_int(ctx, "durationi", duration,
366                                 AV_OPT_SEARCH_CHILDREN);
367     }
368     if (ret >= 0 && start_time != AV_NOPTS_VALUE) {
369         ret = av_opt_set_int(ctx, "starti", start_time,
370                                 AV_OPT_SEARCH_CHILDREN);
371     }
372     if (ret < 0) {
373         av_log(ctx, AV_LOG_ERROR, "Error configuring the %s filter", name);
374         return ret;
375     }
376
377     ret = avfilter_init_str(ctx, NULL);
378     if (ret < 0)
379         return ret;
380
381     ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
382     if (ret < 0)
383         return ret;
384
385     *last_filter = ctx;
386     *pad_idx     = 0;
387     return 0;
388 }
389
390 static int insert_filter(AVFilterContext **last_filter, int *pad_idx,
391                          const char *filter_name, const char *args)
392 {
393     AVFilterGraph *graph = (*last_filter)->graph;
394     AVFilterContext *ctx;
395     int ret;
396
397     ret = avfilter_graph_create_filter(&ctx,
398                                        avfilter_get_by_name(filter_name),
399                                        filter_name, args, NULL, graph);
400     if (ret < 0)
401         return ret;
402
403     ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
404     if (ret < 0)
405         return ret;
406
407     *last_filter = ctx;
408     *pad_idx     = 0;
409     return 0;
410 }
411
412 static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
413 {
414     char *pix_fmts;
415     OutputStream *ost = ofilter->ost;
416     OutputFile    *of = output_files[ost->file_index];
417     AVCodecContext *codec = ost->enc_ctx;
418     AVFilterContext *last_filter = out->filter_ctx;
419     int pad_idx = out->pad_idx;
420     int ret;
421     char name[255];
422
423     snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
424     ret = avfilter_graph_create_filter(&ofilter->filter,
425                                        avfilter_get_by_name("buffersink"),
426                                        name, NULL, NULL, fg->graph);
427
428     if (ret < 0)
429         return ret;
430
431     if (!hw_device_ctx && (codec->width || codec->height)) {
432         char args[255];
433         AVFilterContext *filter;
434         AVDictionaryEntry *e = NULL;
435
436         snprintf(args, sizeof(args), "%d:%d",
437                  codec->width,
438                  codec->height);
439
440         while ((e = av_dict_get(ost->sws_dict, "", e,
441                                 AV_DICT_IGNORE_SUFFIX))) {
442             av_strlcatf(args, sizeof(args), ":%s=%s", e->key, e->value);
443         }
444
445         snprintf(name, sizeof(name), "scaler for output stream %d:%d",
446                  ost->file_index, ost->index);
447         if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
448                                                 name, args, NULL, fg->graph)) < 0)
449             return ret;
450         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
451             return ret;
452
453         last_filter = filter;
454         pad_idx = 0;
455     }
456
457     if ((pix_fmts = choose_pix_fmts(ost))) {
458         AVFilterContext *filter;
459         snprintf(name, sizeof(name), "pixel format for output stream %d:%d",
460                  ost->file_index, ost->index);
461         ret = avfilter_graph_create_filter(&filter,
462                                            avfilter_get_by_name("format"),
463                                            "format", pix_fmts, NULL, fg->graph);
464         av_freep(&pix_fmts);
465         if (ret < 0)
466             return ret;
467         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
468             return ret;
469
470         last_filter = filter;
471         pad_idx     = 0;
472     }
473
474     if (ost->frame_rate.num && 0) {
475         AVFilterContext *fps;
476         char args[255];
477
478         snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
479                  ost->frame_rate.den);
480         snprintf(name, sizeof(name), "fps for output stream %d:%d",
481                  ost->file_index, ost->index);
482         ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
483                                            name, args, NULL, fg->graph);
484         if (ret < 0)
485             return ret;
486
487         ret = avfilter_link(last_filter, pad_idx, fps, 0);
488         if (ret < 0)
489             return ret;
490         last_filter = fps;
491         pad_idx = 0;
492     }
493
494     snprintf(name, sizeof(name), "trim for output stream %d:%d",
495              ost->file_index, ost->index);
496     ret = insert_trim(of->start_time, of->recording_time,
497                       &last_filter, &pad_idx, name);
498     if (ret < 0)
499         return ret;
500
501
502     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
503         return ret;
504
505     return 0;
506 }
507
508 static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
509 {
510     OutputStream *ost = ofilter->ost;
511     OutputFile    *of = output_files[ost->file_index];
512     AVCodecContext *codec  = ost->enc_ctx;
513     AVFilterContext *last_filter = out->filter_ctx;
514     int pad_idx = out->pad_idx;
515     char *sample_fmts, *sample_rates, *channel_layouts;
516     char name[255];
517     int ret;
518
519     snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
520     ret = avfilter_graph_create_filter(&ofilter->filter,
521                                        avfilter_get_by_name("abuffersink"),
522                                        name, NULL, NULL, fg->graph);
523     if (ret < 0)
524         return ret;
525     if ((ret = av_opt_set_int(ofilter->filter, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
526         return ret;
527
528 #define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do {                 \
529     AVFilterContext *filt_ctx;                                              \
530                                                                             \
531     av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi "            \
532            "similarly to -af " filter_name "=%s.\n", arg);                  \
533                                                                             \
534     ret = avfilter_graph_create_filter(&filt_ctx,                           \
535                                        avfilter_get_by_name(filter_name),   \
536                                        filter_name, arg, NULL, fg->graph);  \
537     if (ret < 0)                                                            \
538         return ret;                                                         \
539                                                                             \
540     ret = avfilter_link(last_filter, pad_idx, filt_ctx, 0);                 \
541     if (ret < 0)                                                            \
542         return ret;                                                         \
543                                                                             \
544     last_filter = filt_ctx;                                                 \
545     pad_idx = 0;                                                            \
546 } while (0)
547     if (ost->audio_channels_mapped) {
548         int i;
549         AVBPrint pan_buf;
550         av_bprint_init(&pan_buf, 256, 8192);
551         av_bprintf(&pan_buf, "0x%"PRIx64,
552                    av_get_default_channel_layout(ost->audio_channels_mapped));
553         for (i = 0; i < ost->audio_channels_mapped; i++)
554             if (ost->audio_channels_map[i] != -1)
555                 av_bprintf(&pan_buf, "|c%d=c%d", i, ost->audio_channels_map[i]);
556
557         AUTO_INSERT_FILTER("-map_channel", "pan", pan_buf.str);
558         av_bprint_finalize(&pan_buf, NULL);
559     }
560
561     if (codec->channels && !codec->channel_layout)
562         codec->channel_layout = av_get_default_channel_layout(codec->channels);
563
564     sample_fmts     = choose_sample_fmts(ost);
565     sample_rates    = choose_sample_rates(ost);
566     channel_layouts = choose_channel_layouts(ost);
567     if (sample_fmts || sample_rates || channel_layouts) {
568         AVFilterContext *format;
569         char args[256];
570         args[0] = 0;
571
572         if (sample_fmts)
573             av_strlcatf(args, sizeof(args), "sample_fmts=%s:",
574                             sample_fmts);
575         if (sample_rates)
576             av_strlcatf(args, sizeof(args), "sample_rates=%s:",
577                             sample_rates);
578         if (channel_layouts)
579             av_strlcatf(args, sizeof(args), "channel_layouts=%s:",
580                             channel_layouts);
581
582         av_freep(&sample_fmts);
583         av_freep(&sample_rates);
584         av_freep(&channel_layouts);
585
586         snprintf(name, sizeof(name), "audio format for output stream %d:%d",
587                  ost->file_index, ost->index);
588         ret = avfilter_graph_create_filter(&format,
589                                            avfilter_get_by_name("aformat"),
590                                            name, args, NULL, fg->graph);
591         if (ret < 0)
592             return ret;
593
594         ret = avfilter_link(last_filter, pad_idx, format, 0);
595         if (ret < 0)
596             return ret;
597
598         last_filter = format;
599         pad_idx = 0;
600     }
601
602     if (audio_volume != 256 && 0) {
603         char args[256];
604
605         snprintf(args, sizeof(args), "%f", audio_volume / 256.);
606         AUTO_INSERT_FILTER("-vol", "volume", args);
607     }
608
609     if (ost->apad && of->shortest) {
610         char args[256];
611         int i;
612
613         for (i=0; i<of->ctx->nb_streams; i++)
614             if (of->ctx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO)
615                 break;
616
617         if (i<of->ctx->nb_streams) {
618             snprintf(args, sizeof(args), "%s", ost->apad);
619             AUTO_INSERT_FILTER("-apad", "apad", args);
620         }
621     }
622
623     snprintf(name, sizeof(name), "trim for output stream %d:%d",
624              ost->file_index, ost->index);
625     ret = insert_trim(of->start_time, of->recording_time,
626                       &last_filter, &pad_idx, name);
627     if (ret < 0)
628         return ret;
629
630     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
631         return ret;
632
633     return 0;
634 }
635
636 #define DESCRIBE_FILTER_LINK(f, inout, in)                         \
637 {                                                                  \
638     AVFilterContext *ctx = inout->filter_ctx;                      \
639     AVFilterPad *pads = in ? ctx->input_pads  : ctx->output_pads;  \
640     int       nb_pads = in ? ctx->nb_inputs   : ctx->nb_outputs;   \
641     AVIOContext *pb;                                               \
642                                                                    \
643     if (avio_open_dyn_buf(&pb) < 0)                                \
644         exit_program(1);                                           \
645                                                                    \
646     avio_printf(pb, "%s", ctx->filter->name);                      \
647     if (nb_pads > 1)                                               \
648         avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));\
649     avio_w8(pb, 0);                                                \
650     avio_close_dyn_buf(pb, &f->name);                              \
651 }
652
653 int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
654 {
655     av_freep(&ofilter->name);
656     DESCRIBE_FILTER_LINK(ofilter, out, 0);
657
658     if (!ofilter->ost) {
659         av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", ofilter->name);
660         exit_program(1);
661     }
662
663     switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
664     case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
665     case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
666     default: av_assert0(0);
667     }
668 }
669
670 static int sub2video_prepare(InputStream *ist)
671 {
672     AVFormatContext *avf = input_files[ist->file_index]->ctx;
673     int i, w, h;
674
675     /* Compute the size of the canvas for the subtitles stream.
676        If the subtitles codec has set a size, use it. Otherwise use the
677        maximum dimensions of the video streams in the same file. */
678     w = ist->dec_ctx->width;
679     h = ist->dec_ctx->height;
680     if (!(w && h)) {
681         for (i = 0; i < avf->nb_streams; i++) {
682             if (avf->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
683                 w = FFMAX(w, avf->streams[i]->codec->width);
684                 h = FFMAX(h, avf->streams[i]->codec->height);
685             }
686         }
687         if (!(w && h)) {
688             w = FFMAX(w, 720);
689             h = FFMAX(h, 576);
690         }
691         av_log(avf, AV_LOG_INFO, "sub2video: using %dx%d canvas\n", w, h);
692     }
693     ist->sub2video.w = ist->resample_width  = w;
694     ist->sub2video.h = ist->resample_height = h;
695
696     /* rectangles are AV_PIX_FMT_PAL8, but we have no guarantee that the
697        palettes for all rectangles are identical or compatible */
698     ist->resample_pix_fmt = ist->dec_ctx->pix_fmt = AV_PIX_FMT_RGB32;
699
700     ist->sub2video.frame = av_frame_alloc();
701     if (!ist->sub2video.frame)
702         return AVERROR(ENOMEM);
703     ist->sub2video.last_pts = INT64_MIN;
704     return 0;
705 }
706
707 static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
708                                         AVFilterInOut *in)
709 {
710     AVFilterContext *last_filter;
711     const AVFilter *buffer_filt = avfilter_get_by_name("buffer");
712     InputStream *ist = ifilter->ist;
713     InputFile     *f = input_files[ist->file_index];
714     AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
715                                          ist->st->time_base;
716     AVRational fr = ist->framerate;
717     AVRational sar;
718     AVBPrint args;
719     char name[255];
720     int ret, pad_idx = 0;
721     int64_t tsoffset = 0;
722     AVBufferSrcParameters *par = av_buffersrc_parameters_alloc();
723
724     if (!par)
725         return AVERROR(ENOMEM);
726     memset(par, 0, sizeof(*par));
727     par->format = AV_PIX_FMT_NONE;
728
729     if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
730         av_log(NULL, AV_LOG_ERROR, "Cannot connect video filter to audio input\n");
731         ret = AVERROR(EINVAL);
732         goto fail;
733     }
734
735     if (!fr.num)
736         fr = av_guess_frame_rate(input_files[ist->file_index]->ctx, ist->st, NULL);
737
738     if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
739         ret = sub2video_prepare(ist);
740         if (ret < 0)
741             goto fail;
742     }
743
744     sar = ist->st->sample_aspect_ratio.num ?
745           ist->st->sample_aspect_ratio :
746           ist->dec_ctx->sample_aspect_ratio;
747     if(!sar.den)
748         sar = (AVRational){0,1};
749     av_bprint_init(&args, 0, 1);
750     av_bprintf(&args,
751              "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:"
752              "pixel_aspect=%d/%d:sws_param=flags=%d", ist->resample_width,
753              ist->resample_height,
754              ist->hwaccel_retrieve_data ? ist->hwaccel_retrieved_pix_fmt : ist->resample_pix_fmt,
755              tb.num, tb.den, sar.num, sar.den,
756              SWS_BILINEAR + ((ist->dec_ctx->flags&AV_CODEC_FLAG_BITEXACT) ? SWS_BITEXACT:0));
757     if (fr.num && fr.den)
758         av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
759     snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
760              ist->file_index, ist->st->index);
761
762
763     if ((ret = avfilter_graph_create_filter(&ifilter->filter, buffer_filt, name,
764                                             args.str, NULL, fg->graph)) < 0)
765         goto fail;
766     par->hw_frames_ctx = ist->hw_frames_ctx;
767     ret = av_buffersrc_parameters_set(ifilter->filter, par);
768     if (ret < 0)
769         goto fail;
770     av_freep(&par);
771     last_filter = ifilter->filter;
772
773     if (ist->autorotate) {
774         double theta = get_rotation(ist->st);
775
776         if (fabs(theta - 90) < 1.0) {
777             ret = insert_filter(&last_filter, &pad_idx, "transpose", "clock");
778         } else if (fabs(theta - 180) < 1.0) {
779             ret = insert_filter(&last_filter, &pad_idx, "hflip", NULL);
780             if (ret < 0)
781                 return ret;
782             ret = insert_filter(&last_filter, &pad_idx, "vflip", NULL);
783         } else if (fabs(theta - 270) < 1.0) {
784             ret = insert_filter(&last_filter, &pad_idx, "transpose", "cclock");
785         } else if (fabs(theta) > 1.0) {
786             char rotate_buf[64];
787             snprintf(rotate_buf, sizeof(rotate_buf), "%f*PI/180", theta);
788             ret = insert_filter(&last_filter, &pad_idx, "rotate", rotate_buf);
789         }
790         if (ret < 0)
791             return ret;
792     }
793
794     if (ist->framerate.num) {
795         AVFilterContext *setpts;
796
797         snprintf(name, sizeof(name), "force CFR for input from stream %d:%d",
798                  ist->file_index, ist->st->index);
799         if ((ret = avfilter_graph_create_filter(&setpts,
800                                                 avfilter_get_by_name("setpts"),
801                                                 name, "N", NULL,
802                                                 fg->graph)) < 0)
803             return ret;
804
805         if ((ret = avfilter_link(last_filter, 0, setpts, 0)) < 0)
806             return ret;
807
808         last_filter = setpts;
809     }
810
811     if (do_deinterlace) {
812         AVFilterContext *yadif;
813
814         snprintf(name, sizeof(name), "deinterlace input from stream %d:%d",
815                  ist->file_index, ist->st->index);
816         if ((ret = avfilter_graph_create_filter(&yadif,
817                                                 avfilter_get_by_name("yadif"),
818                                                 name, "", NULL,
819                                                 fg->graph)) < 0)
820             return ret;
821
822         if ((ret = avfilter_link(last_filter, 0, yadif, 0)) < 0)
823             return ret;
824
825         last_filter = yadif;
826     }
827
828     snprintf(name, sizeof(name), "trim for input stream %d:%d",
829              ist->file_index, ist->st->index);
830     if (copy_ts) {
831         tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
832         if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
833             tsoffset += f->ctx->start_time;
834     }
835     ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
836                       AV_NOPTS_VALUE : tsoffset, f->recording_time,
837                       &last_filter, &pad_idx, name);
838     if (ret < 0)
839         return ret;
840
841     if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
842         return ret;
843     return 0;
844 fail:
845     av_freep(&par);
846
847     return ret;
848 }
849
850 static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
851                                         AVFilterInOut *in)
852 {
853     AVFilterContext *last_filter;
854     const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer");
855     InputStream *ist = ifilter->ist;
856     InputFile     *f = input_files[ist->file_index];
857     AVBPrint args;
858     char name[255];
859     int ret, pad_idx = 0;
860     int64_t tsoffset = 0;
861
862     if (ist->dec_ctx->codec_type != AVMEDIA_TYPE_AUDIO) {
863         av_log(NULL, AV_LOG_ERROR, "Cannot connect audio filter to non audio input\n");
864         return AVERROR(EINVAL);
865     }
866
867     av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
868     av_bprintf(&args, "time_base=%d/%d:sample_rate=%d:sample_fmt=%s",
869              1, ist->dec_ctx->sample_rate,
870              ist->dec_ctx->sample_rate,
871              av_get_sample_fmt_name(ist->dec_ctx->sample_fmt));
872     if (ist->dec_ctx->channel_layout)
873         av_bprintf(&args, ":channel_layout=0x%"PRIx64,
874                    ist->dec_ctx->channel_layout);
875     else
876         av_bprintf(&args, ":channels=%d", ist->dec_ctx->channels);
877     snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
878              ist->file_index, ist->st->index);
879
880     if ((ret = avfilter_graph_create_filter(&ifilter->filter, abuffer_filt,
881                                             name, args.str, NULL,
882                                             fg->graph)) < 0)
883         return ret;
884     last_filter = ifilter->filter;
885
886 #define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg) do {                 \
887     AVFilterContext *filt_ctx;                                              \
888                                                                             \
889     av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi "            \
890            "similarly to -af " filter_name "=%s.\n", arg);                  \
891                                                                             \
892     snprintf(name, sizeof(name), "graph %d %s for input stream %d:%d",      \
893                 fg->index, filter_name, ist->file_index, ist->st->index);   \
894     ret = avfilter_graph_create_filter(&filt_ctx,                           \
895                                        avfilter_get_by_name(filter_name),   \
896                                        name, arg, NULL, fg->graph);         \
897     if (ret < 0)                                                            \
898         return ret;                                                         \
899                                                                             \
900     ret = avfilter_link(last_filter, 0, filt_ctx, 0);                       \
901     if (ret < 0)                                                            \
902         return ret;                                                         \
903                                                                             \
904     last_filter = filt_ctx;                                                 \
905 } while (0)
906
907     if (audio_sync_method > 0) {
908         char args[256] = {0};
909
910         av_strlcatf(args, sizeof(args), "async=%d", audio_sync_method);
911         if (audio_drift_threshold != 0.1)
912             av_strlcatf(args, sizeof(args), ":min_hard_comp=%f", audio_drift_threshold);
913         if (!fg->reconfiguration)
914             av_strlcatf(args, sizeof(args), ":first_pts=0");
915         AUTO_INSERT_FILTER_INPUT("-async", "aresample", args);
916     }
917
918 //     if (ost->audio_channels_mapped) {
919 //         int i;
920 //         AVBPrint pan_buf;
921 //         av_bprint_init(&pan_buf, 256, 8192);
922 //         av_bprintf(&pan_buf, "0x%"PRIx64,
923 //                    av_get_default_channel_layout(ost->audio_channels_mapped));
924 //         for (i = 0; i < ost->audio_channels_mapped; i++)
925 //             if (ost->audio_channels_map[i] != -1)
926 //                 av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
927 //         AUTO_INSERT_FILTER_INPUT("-map_channel", "pan", pan_buf.str);
928 //         av_bprint_finalize(&pan_buf, NULL);
929 //     }
930
931     if (audio_volume != 256) {
932         char args[256];
933
934         av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume "
935                "audio filter instead.\n");
936
937         snprintf(args, sizeof(args), "%f", audio_volume / 256.);
938         AUTO_INSERT_FILTER_INPUT("-vol", "volume", args);
939     }
940
941     snprintf(name, sizeof(name), "trim for input stream %d:%d",
942              ist->file_index, ist->st->index);
943     if (copy_ts) {
944         tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
945         if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
946             tsoffset += f->ctx->start_time;
947     }
948     ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
949                       AV_NOPTS_VALUE : tsoffset, f->recording_time,
950                       &last_filter, &pad_idx, name);
951     if (ret < 0)
952         return ret;
953
954     if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
955         return ret;
956
957     return 0;
958 }
959
960 static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
961                                   AVFilterInOut *in)
962 {
963     av_freep(&ifilter->name);
964     DESCRIBE_FILTER_LINK(ifilter, in, 1);
965
966     if (!ifilter->ist->dec) {
967         av_log(NULL, AV_LOG_ERROR,
968                "No decoder for stream #%d:%d, filtering impossible\n",
969                ifilter->ist->file_index, ifilter->ist->st->index);
970         return AVERROR_DECODER_NOT_FOUND;
971     }
972     switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
973     case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
974     case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
975     default: av_assert0(0);
976     }
977 }
978
979 int configure_filtergraph(FilterGraph *fg)
980 {
981     AVFilterInOut *inputs, *outputs, *cur;
982     int ret, i, simple = filtergraph_is_simple(fg);
983     const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
984                                       fg->graph_desc;
985
986     avfilter_graph_free(&fg->graph);
987     if (!(fg->graph = avfilter_graph_alloc()))
988         return AVERROR(ENOMEM);
989
990     if (simple) {
991         OutputStream *ost = fg->outputs[0]->ost;
992         char args[512];
993         AVDictionaryEntry *e = NULL;
994
995         args[0] = 0;
996         while ((e = av_dict_get(ost->sws_dict, "", e,
997                                 AV_DICT_IGNORE_SUFFIX))) {
998             av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
999         }
1000         if (strlen(args))
1001             args[strlen(args)-1] = 0;
1002         fg->graph->scale_sws_opts = av_strdup(args);
1003
1004         args[0] = 0;
1005         while ((e = av_dict_get(ost->swr_opts, "", e,
1006                                 AV_DICT_IGNORE_SUFFIX))) {
1007             av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1008         }
1009         if (strlen(args))
1010             args[strlen(args)-1] = 0;
1011         av_opt_set(fg->graph, "aresample_swr_opts", args, 0);
1012
1013         args[0] = '\0';
1014         while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e,
1015                                 AV_DICT_IGNORE_SUFFIX))) {
1016             av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1017         }
1018         if (strlen(args))
1019             args[strlen(args) - 1] = '\0';
1020         fg->graph->resample_lavr_opts = av_strdup(args);
1021
1022         e = av_dict_get(ost->encoder_opts, "threads", NULL, 0);
1023         if (e)
1024             av_opt_set(fg->graph, "threads", e->value, 0);
1025     }
1026
1027     if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
1028         return ret;
1029
1030     if (hw_device_ctx) {
1031         for (i = 0; i < fg->graph->nb_filters; i++) {
1032             fg->graph->filters[i]->hw_device_ctx = av_buffer_ref(hw_device_ctx);
1033         }
1034     }
1035
1036     if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
1037         const char *num_inputs;
1038         const char *num_outputs;
1039         if (!outputs) {
1040             num_outputs = "0";
1041         } else if (outputs->next) {
1042             num_outputs = ">1";
1043         } else {
1044             num_outputs = "1";
1045         }
1046         if (!inputs) {
1047             num_inputs = "0";
1048         } else if (inputs->next) {
1049             num_inputs = ">1";
1050         } else {
1051             num_inputs = "1";
1052         }
1053         av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' was expected "
1054                "to have exactly 1 input and 1 output."
1055                " However, it had %s input(s) and %s output(s)."
1056                " Please adjust, or use a complex filtergraph (-filter_complex) instead.\n",
1057                graph_desc, num_inputs, num_outputs);
1058         return AVERROR(EINVAL);
1059     }
1060
1061     for (cur = inputs, i = 0; cur; cur = cur->next, i++)
1062         if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0) {
1063             avfilter_inout_free(&inputs);
1064             avfilter_inout_free(&outputs);
1065             return ret;
1066         }
1067     avfilter_inout_free(&inputs);
1068
1069     for (cur = outputs, i = 0; cur; cur = cur->next, i++)
1070         configure_output_filter(fg, fg->outputs[i], cur);
1071     avfilter_inout_free(&outputs);
1072
1073     if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
1074         return ret;
1075
1076     fg->reconfiguration = 1;
1077
1078     for (i = 0; i < fg->nb_outputs; i++) {
1079         OutputStream *ost = fg->outputs[i]->ost;
1080         if (!ost->enc) {
1081             /* identical to the same check in ffmpeg.c, needed because
1082                complex filter graphs are initialized earlier */
1083             av_log(NULL, AV_LOG_ERROR, "Encoder (codec %s) not found for output stream #%d:%d\n",
1084                      avcodec_get_name(ost->st->codec->codec_id), ost->file_index, ost->index);
1085             return AVERROR(EINVAL);
1086         }
1087         if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1088             !(ost->enc->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE))
1089             av_buffersink_set_frame_size(ost->filter->filter,
1090                                          ost->enc_ctx->frame_size);
1091     }
1092
1093     return 0;
1094 }
1095
1096 int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
1097 {
1098     int i;
1099     for (i = 0; i < fg->nb_inputs; i++)
1100         if (fg->inputs[i]->ist == ist)
1101             return 1;
1102     return 0;
1103 }
1104
1105 int filtergraph_is_simple(FilterGraph *fg)
1106 {
1107     return !fg->graph_desc;
1108 }