ffmpeg: skip disabled streams
[ffmpeg.git] / fftools / 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         //FIXME: This should check for AV_PIX_FMT_FLAG_ALPHA after PAL8 pixel format without alpha is implemented
69         int has_alpha = desc ? desc->nb_components % 2 == 0 : 0;
70         enum AVPixelFormat best= AV_PIX_FMT_NONE;
71
72         if (enc_ctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
73             p = get_compliance_unofficial_pix_fmts(enc_ctx->codec_id, p);
74         }
75         for (; *p != AV_PIX_FMT_NONE; p++) {
76             best= avcodec_find_best_pix_fmt_of_2(best, *p, target, has_alpha, NULL);
77             if (*p == target)
78                 break;
79         }
80         if (*p == AV_PIX_FMT_NONE) {
81             if (target != AV_PIX_FMT_NONE)
82                 av_log(NULL, AV_LOG_WARNING,
83                        "Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
84                        av_get_pix_fmt_name(target),
85                        codec->name,
86                        av_get_pix_fmt_name(best));
87             return best;
88         }
89     }
90     return target;
91 }
92
93 void choose_sample_fmt(AVStream *st, AVCodec *codec)
94 {
95     if (codec && codec->sample_fmts) {
96         const enum AVSampleFormat *p = codec->sample_fmts;
97         for (; *p != -1; p++) {
98             if (*p == st->codecpar->format)
99                 break;
100         }
101         if (*p == -1) {
102             if((codec->capabilities & AV_CODEC_CAP_LOSSLESS) && av_get_sample_fmt_name(st->codecpar->format) > av_get_sample_fmt_name(codec->sample_fmts[0]))
103                 av_log(NULL, AV_LOG_ERROR, "Conversion will not be lossless.\n");
104             if(av_get_sample_fmt_name(st->codecpar->format))
105             av_log(NULL, AV_LOG_WARNING,
106                    "Incompatible sample format '%s' for codec '%s', auto-selecting format '%s'\n",
107                    av_get_sample_fmt_name(st->codecpar->format),
108                    codec->name,
109                    av_get_sample_fmt_name(codec->sample_fmts[0]));
110             st->codecpar->format = codec->sample_fmts[0];
111         }
112     }
113 }
114
115 static char *choose_pix_fmts(OutputFilter *ofilter)
116 {
117     OutputStream *ost = ofilter->ost;
118     AVDictionaryEntry *strict_dict = av_dict_get(ost->encoder_opts, "strict", NULL, 0);
119     if (strict_dict)
120         // used by choose_pixel_fmt() and below
121         av_opt_set(ost->enc_ctx, "strict", strict_dict->value, 0);
122
123      if (ost->keep_pix_fmt) {
124         avfilter_graph_set_auto_convert(ofilter->graph->graph,
125                                             AVFILTER_AUTO_CONVERT_NONE);
126         if (ost->enc_ctx->pix_fmt == AV_PIX_FMT_NONE)
127             return NULL;
128         return av_strdup(av_get_pix_fmt_name(ost->enc_ctx->pix_fmt));
129     }
130     if (ost->enc_ctx->pix_fmt != AV_PIX_FMT_NONE) {
131         return av_strdup(av_get_pix_fmt_name(choose_pixel_fmt(ost->st, ost->enc_ctx, ost->enc, ost->enc_ctx->pix_fmt)));
132     } else if (ost->enc && ost->enc->pix_fmts) {
133         const enum AVPixelFormat *p;
134         AVIOContext *s = NULL;
135         uint8_t *ret;
136         int len;
137
138         if (avio_open_dyn_buf(&s) < 0)
139             exit_program(1);
140
141         p = ost->enc->pix_fmts;
142         if (ost->enc_ctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
143             p = get_compliance_unofficial_pix_fmts(ost->enc_ctx->codec_id, p);
144         }
145
146         for (; *p != AV_PIX_FMT_NONE; p++) {
147             const char *name = av_get_pix_fmt_name(*p);
148             avio_printf(s, "%s|", name);
149         }
150         len = avio_close_dyn_buf(s, &ret);
151         ret[len - 1] = 0;
152         return ret;
153     } else
154         return NULL;
155 }
156
157 /* Define a function for building a string containing a list of
158  * allowed formats. */
159 #define DEF_CHOOSE_FORMAT(suffix, type, var, supported_list, none, get_name)   \
160 static char *choose_ ## suffix (OutputFilter *ofilter)                         \
161 {                                                                              \
162     if (ofilter->var != none) {                                                \
163         get_name(ofilter->var);                                                \
164         return av_strdup(name);                                                \
165     } else if (ofilter->supported_list) {                                      \
166         const type *p;                                                         \
167         AVIOContext *s = NULL;                                                 \
168         uint8_t *ret;                                                          \
169         int len;                                                               \
170                                                                                \
171         if (avio_open_dyn_buf(&s) < 0)                                         \
172             exit_program(1);                                                           \
173                                                                                \
174         for (p = ofilter->supported_list; *p != none; p++) {                   \
175             get_name(*p);                                                      \
176             avio_printf(s, "%s|", name);                                       \
177         }                                                                      \
178         len = avio_close_dyn_buf(s, &ret);                                     \
179         ret[len - 1] = 0;                                                      \
180         return ret;                                                            \
181     } else                                                                     \
182         return NULL;                                                           \
183 }
184
185 //DEF_CHOOSE_FORMAT(pix_fmts, enum AVPixelFormat, format, formats, AV_PIX_FMT_NONE,
186 //                  GET_PIX_FMT_NAME)
187
188 DEF_CHOOSE_FORMAT(sample_fmts, enum AVSampleFormat, format, formats,
189                   AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME)
190
191 DEF_CHOOSE_FORMAT(sample_rates, int, sample_rate, sample_rates, 0,
192                   GET_SAMPLE_RATE_NAME)
193
194 DEF_CHOOSE_FORMAT(channel_layouts, uint64_t, channel_layout, channel_layouts, 0,
195                   GET_CH_LAYOUT_NAME)
196
197 int init_simple_filtergraph(InputStream *ist, OutputStream *ost)
198 {
199     FilterGraph *fg = av_mallocz(sizeof(*fg));
200
201     if (!fg)
202         exit_program(1);
203     fg->index = nb_filtergraphs;
204
205     GROW_ARRAY(fg->outputs, fg->nb_outputs);
206     if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
207         exit_program(1);
208     fg->outputs[0]->ost   = ost;
209     fg->outputs[0]->graph = fg;
210     fg->outputs[0]->format = -1;
211
212     ost->filter = fg->outputs[0];
213
214     GROW_ARRAY(fg->inputs, fg->nb_inputs);
215     if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
216         exit_program(1);
217     fg->inputs[0]->ist   = ist;
218     fg->inputs[0]->graph = fg;
219     fg->inputs[0]->format = -1;
220
221     fg->inputs[0]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
222     if (!fg->inputs[0]->frame_queue)
223         exit_program(1);
224
225     GROW_ARRAY(ist->filters, ist->nb_filters);
226     ist->filters[ist->nb_filters - 1] = fg->inputs[0];
227
228     GROW_ARRAY(filtergraphs, nb_filtergraphs);
229     filtergraphs[nb_filtergraphs - 1] = fg;
230
231     return 0;
232 }
233
234 static char *describe_filter_link(FilterGraph *fg, AVFilterInOut *inout, int in)
235 {
236     AVFilterContext *ctx = inout->filter_ctx;
237     AVFilterPad *pads = in ? ctx->input_pads  : ctx->output_pads;
238     int       nb_pads = in ? ctx->nb_inputs   : ctx->nb_outputs;
239     AVIOContext *pb;
240     uint8_t *res = NULL;
241
242     if (avio_open_dyn_buf(&pb) < 0)
243         exit_program(1);
244
245     avio_printf(pb, "%s", ctx->filter->name);
246     if (nb_pads > 1)
247         avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));
248     avio_w8(pb, 0);
249     avio_close_dyn_buf(pb, &res);
250     return res;
251 }
252
253 static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
254 {
255     InputStream *ist = NULL;
256     enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
257     int i;
258
259     // TODO: support other filter types
260     if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
261         av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
262                "currently.\n");
263         exit_program(1);
264     }
265
266     if (in->name) {
267         AVFormatContext *s;
268         AVStream       *st = NULL;
269         char *p;
270         int file_idx = strtol(in->name, &p, 0);
271
272         if (file_idx < 0 || file_idx >= nb_input_files) {
273             av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtergraph description %s.\n",
274                    file_idx, fg->graph_desc);
275             exit_program(1);
276         }
277         s = input_files[file_idx]->ctx;
278
279         for (i = 0; i < s->nb_streams; i++) {
280             enum AVMediaType stream_type = s->streams[i]->codecpar->codec_type;
281             if (stream_type != type &&
282                 !(stream_type == AVMEDIA_TYPE_SUBTITLE &&
283                   type == AVMEDIA_TYPE_VIDEO /* sub2video hack */))
284                 continue;
285             if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
286                 st = s->streams[i];
287                 break;
288             }
289         }
290         if (!st) {
291             av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
292                    "matches no streams.\n", p, fg->graph_desc);
293             exit_program(1);
294         }
295         ist = input_streams[input_files[file_idx]->ist_index + st->index];
296         if (ist->user_set_discard == AVDISCARD_ALL) {
297             av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
298                    "matches a disabled input stream.\n", p, fg->graph_desc);
299             exit_program(1);
300         }
301     } else {
302         /* find the first unused stream of corresponding type */
303         for (i = 0; i < nb_input_streams; i++) {
304             ist = input_streams[i];
305             if (ist->user_set_discard == AVDISCARD_ALL)
306                 continue;
307             if (ist->dec_ctx->codec_type == type && ist->discard)
308                 break;
309         }
310         if (i == nb_input_streams) {
311             av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
312                    "unlabeled input pad %d on filter %s\n", in->pad_idx,
313                    in->filter_ctx->name);
314             exit_program(1);
315         }
316     }
317     av_assert0(ist);
318
319     ist->discard         = 0;
320     ist->decoding_needed |= DECODING_FOR_FILTER;
321     ist->st->discard = AVDISCARD_NONE;
322
323     GROW_ARRAY(fg->inputs, fg->nb_inputs);
324     if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
325         exit_program(1);
326     fg->inputs[fg->nb_inputs - 1]->ist   = ist;
327     fg->inputs[fg->nb_inputs - 1]->graph = fg;
328     fg->inputs[fg->nb_inputs - 1]->format = -1;
329     fg->inputs[fg->nb_inputs - 1]->type = ist->st->codecpar->codec_type;
330     fg->inputs[fg->nb_inputs - 1]->name = describe_filter_link(fg, in, 1);
331
332     fg->inputs[fg->nb_inputs - 1]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
333     if (!fg->inputs[fg->nb_inputs - 1]->frame_queue)
334         exit_program(1);
335
336     GROW_ARRAY(ist->filters, ist->nb_filters);
337     ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
338 }
339
340 int init_complex_filtergraph(FilterGraph *fg)
341 {
342     AVFilterInOut *inputs, *outputs, *cur;
343     AVFilterGraph *graph;
344     int ret = 0;
345
346     /* this graph is only used for determining the kinds of inputs
347      * and outputs we have, and is discarded on exit from this function */
348     graph = avfilter_graph_alloc();
349     if (!graph)
350         return AVERROR(ENOMEM);
351     graph->nb_threads = 1;
352
353     ret = avfilter_graph_parse2(graph, fg->graph_desc, &inputs, &outputs);
354     if (ret < 0)
355         goto fail;
356
357     for (cur = inputs; cur; cur = cur->next)
358         init_input_filter(fg, cur);
359
360     for (cur = outputs; cur;) {
361         GROW_ARRAY(fg->outputs, fg->nb_outputs);
362         fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]));
363         if (!fg->outputs[fg->nb_outputs - 1])
364             exit_program(1);
365
366         fg->outputs[fg->nb_outputs - 1]->graph   = fg;
367         fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
368         fg->outputs[fg->nb_outputs - 1]->type    = avfilter_pad_get_type(cur->filter_ctx->output_pads,
369                                                                          cur->pad_idx);
370         fg->outputs[fg->nb_outputs - 1]->name = describe_filter_link(fg, cur, 0);
371         cur = cur->next;
372         fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
373     }
374
375 fail:
376     avfilter_inout_free(&inputs);
377     avfilter_graph_free(&graph);
378     return ret;
379 }
380
381 static int insert_trim(int64_t start_time, int64_t duration,
382                        AVFilterContext **last_filter, int *pad_idx,
383                        const char *filter_name)
384 {
385     AVFilterGraph *graph = (*last_filter)->graph;
386     AVFilterContext *ctx;
387     const AVFilter *trim;
388     enum AVMediaType type = avfilter_pad_get_type((*last_filter)->output_pads, *pad_idx);
389     const char *name = (type == AVMEDIA_TYPE_VIDEO) ? "trim" : "atrim";
390     int ret = 0;
391
392     if (duration == INT64_MAX && start_time == AV_NOPTS_VALUE)
393         return 0;
394
395     trim = avfilter_get_by_name(name);
396     if (!trim) {
397         av_log(NULL, AV_LOG_ERROR, "%s filter not present, cannot limit "
398                "recording time.\n", name);
399         return AVERROR_FILTER_NOT_FOUND;
400     }
401
402     ctx = avfilter_graph_alloc_filter(graph, trim, filter_name);
403     if (!ctx)
404         return AVERROR(ENOMEM);
405
406     if (duration != INT64_MAX) {
407         ret = av_opt_set_int(ctx, "durationi", duration,
408                                 AV_OPT_SEARCH_CHILDREN);
409     }
410     if (ret >= 0 && start_time != AV_NOPTS_VALUE) {
411         ret = av_opt_set_int(ctx, "starti", start_time,
412                                 AV_OPT_SEARCH_CHILDREN);
413     }
414     if (ret < 0) {
415         av_log(ctx, AV_LOG_ERROR, "Error configuring the %s filter", name);
416         return ret;
417     }
418
419     ret = avfilter_init_str(ctx, NULL);
420     if (ret < 0)
421         return ret;
422
423     ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
424     if (ret < 0)
425         return ret;
426
427     *last_filter = ctx;
428     *pad_idx     = 0;
429     return 0;
430 }
431
432 static int insert_filter(AVFilterContext **last_filter, int *pad_idx,
433                          const char *filter_name, const char *args)
434 {
435     AVFilterGraph *graph = (*last_filter)->graph;
436     AVFilterContext *ctx;
437     int ret;
438
439     ret = avfilter_graph_create_filter(&ctx,
440                                        avfilter_get_by_name(filter_name),
441                                        filter_name, args, NULL, graph);
442     if (ret < 0)
443         return ret;
444
445     ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
446     if (ret < 0)
447         return ret;
448
449     *last_filter = ctx;
450     *pad_idx     = 0;
451     return 0;
452 }
453
454 static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
455 {
456     char *pix_fmts;
457     OutputStream *ost = ofilter->ost;
458     OutputFile    *of = output_files[ost->file_index];
459     AVFilterContext *last_filter = out->filter_ctx;
460     int pad_idx = out->pad_idx;
461     int ret;
462     char name[255];
463
464     snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
465     ret = avfilter_graph_create_filter(&ofilter->filter,
466                                        avfilter_get_by_name("buffersink"),
467                                        name, NULL, NULL, fg->graph);
468
469     if (ret < 0)
470         return ret;
471
472     if (ofilter->width || ofilter->height) {
473         char args[255];
474         AVFilterContext *filter;
475         AVDictionaryEntry *e = NULL;
476
477         snprintf(args, sizeof(args), "%d:%d",
478                  ofilter->width, ofilter->height);
479
480         while ((e = av_dict_get(ost->sws_dict, "", e,
481                                 AV_DICT_IGNORE_SUFFIX))) {
482             av_strlcatf(args, sizeof(args), ":%s=%s", e->key, e->value);
483         }
484
485         snprintf(name, sizeof(name), "scaler_out_%d_%d",
486                  ost->file_index, ost->index);
487         if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
488                                                 name, args, NULL, fg->graph)) < 0)
489             return ret;
490         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
491             return ret;
492
493         last_filter = filter;
494         pad_idx = 0;
495     }
496
497     if ((pix_fmts = choose_pix_fmts(ofilter))) {
498         AVFilterContext *filter;
499         snprintf(name, sizeof(name), "format_out_%d_%d",
500                  ost->file_index, ost->index);
501         ret = avfilter_graph_create_filter(&filter,
502                                            avfilter_get_by_name("format"),
503                                            "format", pix_fmts, NULL, fg->graph);
504         av_freep(&pix_fmts);
505         if (ret < 0)
506             return ret;
507         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
508             return ret;
509
510         last_filter = filter;
511         pad_idx     = 0;
512     }
513
514     if (ost->frame_rate.num && 0) {
515         AVFilterContext *fps;
516         char args[255];
517
518         snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
519                  ost->frame_rate.den);
520         snprintf(name, sizeof(name), "fps_out_%d_%d",
521                  ost->file_index, ost->index);
522         ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
523                                            name, args, NULL, fg->graph);
524         if (ret < 0)
525             return ret;
526
527         ret = avfilter_link(last_filter, pad_idx, fps, 0);
528         if (ret < 0)
529             return ret;
530         last_filter = fps;
531         pad_idx = 0;
532     }
533
534     snprintf(name, sizeof(name), "trim_out_%d_%d",
535              ost->file_index, ost->index);
536     ret = insert_trim(of->start_time, of->recording_time,
537                       &last_filter, &pad_idx, name);
538     if (ret < 0)
539         return ret;
540
541
542     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
543         return ret;
544
545     return 0;
546 }
547
548 static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
549 {
550     OutputStream *ost = ofilter->ost;
551     OutputFile    *of = output_files[ost->file_index];
552     AVCodecContext *codec  = ost->enc_ctx;
553     AVFilterContext *last_filter = out->filter_ctx;
554     int pad_idx = out->pad_idx;
555     char *sample_fmts, *sample_rates, *channel_layouts;
556     char name[255];
557     int ret;
558
559     snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
560     ret = avfilter_graph_create_filter(&ofilter->filter,
561                                        avfilter_get_by_name("abuffersink"),
562                                        name, NULL, NULL, fg->graph);
563     if (ret < 0)
564         return ret;
565     if ((ret = av_opt_set_int(ofilter->filter, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
566         return ret;
567
568 #define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do {                 \
569     AVFilterContext *filt_ctx;                                              \
570                                                                             \
571     av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi "            \
572            "similarly to -af " filter_name "=%s.\n", arg);                  \
573                                                                             \
574     ret = avfilter_graph_create_filter(&filt_ctx,                           \
575                                        avfilter_get_by_name(filter_name),   \
576                                        filter_name, arg, NULL, fg->graph);  \
577     if (ret < 0)                                                            \
578         return ret;                                                         \
579                                                                             \
580     ret = avfilter_link(last_filter, pad_idx, filt_ctx, 0);                 \
581     if (ret < 0)                                                            \
582         return ret;                                                         \
583                                                                             \
584     last_filter = filt_ctx;                                                 \
585     pad_idx = 0;                                                            \
586 } while (0)
587     if (ost->audio_channels_mapped) {
588         int i;
589         AVBPrint pan_buf;
590         av_bprint_init(&pan_buf, 256, 8192);
591         av_bprintf(&pan_buf, "0x%"PRIx64,
592                    av_get_default_channel_layout(ost->audio_channels_mapped));
593         for (i = 0; i < ost->audio_channels_mapped; i++)
594             if (ost->audio_channels_map[i] != -1)
595                 av_bprintf(&pan_buf, "|c%d=c%d", i, ost->audio_channels_map[i]);
596
597         AUTO_INSERT_FILTER("-map_channel", "pan", pan_buf.str);
598         av_bprint_finalize(&pan_buf, NULL);
599     }
600
601     if (codec->channels && !codec->channel_layout)
602         codec->channel_layout = av_get_default_channel_layout(codec->channels);
603
604     sample_fmts     = choose_sample_fmts(ofilter);
605     sample_rates    = choose_sample_rates(ofilter);
606     channel_layouts = choose_channel_layouts(ofilter);
607     if (sample_fmts || sample_rates || channel_layouts) {
608         AVFilterContext *format;
609         char args[256];
610         args[0] = 0;
611
612         if (sample_fmts)
613             av_strlcatf(args, sizeof(args), "sample_fmts=%s:",
614                             sample_fmts);
615         if (sample_rates)
616             av_strlcatf(args, sizeof(args), "sample_rates=%s:",
617                             sample_rates);
618         if (channel_layouts)
619             av_strlcatf(args, sizeof(args), "channel_layouts=%s:",
620                             channel_layouts);
621
622         av_freep(&sample_fmts);
623         av_freep(&sample_rates);
624         av_freep(&channel_layouts);
625
626         snprintf(name, sizeof(name), "format_out_%d_%d",
627                  ost->file_index, ost->index);
628         ret = avfilter_graph_create_filter(&format,
629                                            avfilter_get_by_name("aformat"),
630                                            name, args, NULL, fg->graph);
631         if (ret < 0)
632             return ret;
633
634         ret = avfilter_link(last_filter, pad_idx, format, 0);
635         if (ret < 0)
636             return ret;
637
638         last_filter = format;
639         pad_idx = 0;
640     }
641
642     if (audio_volume != 256 && 0) {
643         char args[256];
644
645         snprintf(args, sizeof(args), "%f", audio_volume / 256.);
646         AUTO_INSERT_FILTER("-vol", "volume", args);
647     }
648
649     if (ost->apad && of->shortest) {
650         char args[256];
651         int i;
652
653         for (i=0; i<of->ctx->nb_streams; i++)
654             if (of->ctx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
655                 break;
656
657         if (i<of->ctx->nb_streams) {
658             snprintf(args, sizeof(args), "%s", ost->apad);
659             AUTO_INSERT_FILTER("-apad", "apad", args);
660         }
661     }
662
663     snprintf(name, sizeof(name), "trim for output stream %d:%d",
664              ost->file_index, ost->index);
665     ret = insert_trim(of->start_time, of->recording_time,
666                       &last_filter, &pad_idx, name);
667     if (ret < 0)
668         return ret;
669
670     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
671         return ret;
672
673     return 0;
674 }
675
676 int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
677 {
678     if (!ofilter->ost) {
679         av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", ofilter->name);
680         exit_program(1);
681     }
682
683     switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
684     case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
685     case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
686     default: av_assert0(0);
687     }
688 }
689
690 void check_filter_outputs(void)
691 {
692     int i;
693     for (i = 0; i < nb_filtergraphs; i++) {
694         int n;
695         for (n = 0; n < filtergraphs[i]->nb_outputs; n++) {
696             OutputFilter *output = filtergraphs[i]->outputs[n];
697             if (!output->ost) {
698                 av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", output->name);
699                 exit_program(1);
700             }
701         }
702     }
703 }
704
705 static int sub2video_prepare(InputStream *ist, InputFilter *ifilter)
706 {
707     AVFormatContext *avf = input_files[ist->file_index]->ctx;
708     int i, w, h;
709
710     /* Compute the size of the canvas for the subtitles stream.
711        If the subtitles codecpar has set a size, use it. Otherwise use the
712        maximum dimensions of the video streams in the same file. */
713     w = ifilter->width;
714     h = ifilter->height;
715     if (!(w && h)) {
716         for (i = 0; i < avf->nb_streams; i++) {
717             if (avf->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
718                 w = FFMAX(w, avf->streams[i]->codecpar->width);
719                 h = FFMAX(h, avf->streams[i]->codecpar->height);
720             }
721         }
722         if (!(w && h)) {
723             w = FFMAX(w, 720);
724             h = FFMAX(h, 576);
725         }
726         av_log(avf, AV_LOG_INFO, "sub2video: using %dx%d canvas\n", w, h);
727     }
728     ist->sub2video.w = ifilter->width  = w;
729     ist->sub2video.h = ifilter->height = h;
730
731     ifilter->width  = ist->dec_ctx->width  ? ist->dec_ctx->width  : ist->sub2video.w;
732     ifilter->height = ist->dec_ctx->height ? ist->dec_ctx->height : ist->sub2video.h;
733
734     /* rectangles are AV_PIX_FMT_PAL8, but we have no guarantee that the
735        palettes for all rectangles are identical or compatible */
736     ifilter->format = AV_PIX_FMT_RGB32;
737
738     ist->sub2video.frame = av_frame_alloc();
739     if (!ist->sub2video.frame)
740         return AVERROR(ENOMEM);
741     ist->sub2video.last_pts = INT64_MIN;
742     return 0;
743 }
744
745 static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
746                                         AVFilterInOut *in)
747 {
748     AVFilterContext *last_filter;
749     const AVFilter *buffer_filt = avfilter_get_by_name("buffer");
750     InputStream *ist = ifilter->ist;
751     InputFile     *f = input_files[ist->file_index];
752     AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
753                                          ist->st->time_base;
754     AVRational fr = ist->framerate;
755     AVRational sar;
756     AVBPrint args;
757     char name[255];
758     int ret, pad_idx = 0;
759     int64_t tsoffset = 0;
760     AVBufferSrcParameters *par = av_buffersrc_parameters_alloc();
761
762     if (!par)
763         return AVERROR(ENOMEM);
764     memset(par, 0, sizeof(*par));
765     par->format = AV_PIX_FMT_NONE;
766
767     if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
768         av_log(NULL, AV_LOG_ERROR, "Cannot connect video filter to audio input\n");
769         ret = AVERROR(EINVAL);
770         goto fail;
771     }
772
773     if (!fr.num)
774         fr = av_guess_frame_rate(input_files[ist->file_index]->ctx, ist->st, NULL);
775
776     if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
777         ret = sub2video_prepare(ist, ifilter);
778         if (ret < 0)
779             goto fail;
780     }
781
782     sar = ifilter->sample_aspect_ratio;
783     if(!sar.den)
784         sar = (AVRational){0,1};
785     av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
786     av_bprintf(&args,
787              "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:"
788              "pixel_aspect=%d/%d:sws_param=flags=%d",
789              ifilter->width, ifilter->height, ifilter->format,
790              tb.num, tb.den, sar.num, sar.den,
791              SWS_BILINEAR + ((ist->dec_ctx->flags&AV_CODEC_FLAG_BITEXACT) ? SWS_BITEXACT:0));
792     if (fr.num && fr.den)
793         av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
794     snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
795              ist->file_index, ist->st->index);
796
797
798     if ((ret = avfilter_graph_create_filter(&ifilter->filter, buffer_filt, name,
799                                             args.str, NULL, fg->graph)) < 0)
800         goto fail;
801     par->hw_frames_ctx = ifilter->hw_frames_ctx;
802     ret = av_buffersrc_parameters_set(ifilter->filter, par);
803     if (ret < 0)
804         goto fail;
805     av_freep(&par);
806     last_filter = ifilter->filter;
807
808     if (ist->autorotate) {
809         double theta = get_rotation(ist->st);
810
811         if (fabs(theta - 90) < 1.0) {
812             ret = insert_filter(&last_filter, &pad_idx, "transpose", "clock");
813         } else if (fabs(theta - 180) < 1.0) {
814             ret = insert_filter(&last_filter, &pad_idx, "hflip", NULL);
815             if (ret < 0)
816                 return ret;
817             ret = insert_filter(&last_filter, &pad_idx, "vflip", NULL);
818         } else if (fabs(theta - 270) < 1.0) {
819             ret = insert_filter(&last_filter, &pad_idx, "transpose", "cclock");
820         } else if (fabs(theta) > 1.0) {
821             char rotate_buf[64];
822             snprintf(rotate_buf, sizeof(rotate_buf), "%f*PI/180", theta);
823             ret = insert_filter(&last_filter, &pad_idx, "rotate", rotate_buf);
824         }
825         if (ret < 0)
826             return ret;
827     }
828
829     if (do_deinterlace) {
830         AVFilterContext *yadif;
831
832         snprintf(name, sizeof(name), "deinterlace_in_%d_%d",
833                  ist->file_index, ist->st->index);
834         if ((ret = avfilter_graph_create_filter(&yadif,
835                                                 avfilter_get_by_name("yadif"),
836                                                 name, "", NULL,
837                                                 fg->graph)) < 0)
838             return ret;
839
840         if ((ret = avfilter_link(last_filter, 0, yadif, 0)) < 0)
841             return ret;
842
843         last_filter = yadif;
844     }
845
846     snprintf(name, sizeof(name), "trim_in_%d_%d",
847              ist->file_index, ist->st->index);
848     if (copy_ts) {
849         tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
850         if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
851             tsoffset += f->ctx->start_time;
852     }
853     ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
854                       AV_NOPTS_VALUE : tsoffset, f->recording_time,
855                       &last_filter, &pad_idx, name);
856     if (ret < 0)
857         return ret;
858
859     if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
860         return ret;
861     return 0;
862 fail:
863     av_freep(&par);
864
865     return ret;
866 }
867
868 static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
869                                         AVFilterInOut *in)
870 {
871     AVFilterContext *last_filter;
872     const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer");
873     InputStream *ist = ifilter->ist;
874     InputFile     *f = input_files[ist->file_index];
875     AVBPrint args;
876     char name[255];
877     int ret, pad_idx = 0;
878     int64_t tsoffset = 0;
879
880     if (ist->dec_ctx->codec_type != AVMEDIA_TYPE_AUDIO) {
881         av_log(NULL, AV_LOG_ERROR, "Cannot connect audio filter to non audio input\n");
882         return AVERROR(EINVAL);
883     }
884
885     av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
886     av_bprintf(&args, "time_base=%d/%d:sample_rate=%d:sample_fmt=%s",
887              1, ifilter->sample_rate,
888              ifilter->sample_rate,
889              av_get_sample_fmt_name(ifilter->format));
890     if (ifilter->channel_layout)
891         av_bprintf(&args, ":channel_layout=0x%"PRIx64,
892                    ifilter->channel_layout);
893     else
894         av_bprintf(&args, ":channels=%d", ifilter->channels);
895     snprintf(name, sizeof(name), "graph_%d_in_%d_%d", fg->index,
896              ist->file_index, ist->st->index);
897
898     if ((ret = avfilter_graph_create_filter(&ifilter->filter, abuffer_filt,
899                                             name, args.str, NULL,
900                                             fg->graph)) < 0)
901         return ret;
902     last_filter = ifilter->filter;
903
904 #define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg) do {                 \
905     AVFilterContext *filt_ctx;                                              \
906                                                                             \
907     av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi "            \
908            "similarly to -af " filter_name "=%s.\n", arg);                  \
909                                                                             \
910     snprintf(name, sizeof(name), "graph_%d_%s_in_%d_%d",      \
911                 fg->index, filter_name, ist->file_index, ist->st->index);   \
912     ret = avfilter_graph_create_filter(&filt_ctx,                           \
913                                        avfilter_get_by_name(filter_name),   \
914                                        name, arg, NULL, fg->graph);         \
915     if (ret < 0)                                                            \
916         return ret;                                                         \
917                                                                             \
918     ret = avfilter_link(last_filter, 0, filt_ctx, 0);                       \
919     if (ret < 0)                                                            \
920         return ret;                                                         \
921                                                                             \
922     last_filter = filt_ctx;                                                 \
923 } while (0)
924
925     if (audio_sync_method > 0) {
926         char args[256] = {0};
927
928         av_strlcatf(args, sizeof(args), "async=%d", audio_sync_method);
929         if (audio_drift_threshold != 0.1)
930             av_strlcatf(args, sizeof(args), ":min_hard_comp=%f", audio_drift_threshold);
931         if (!fg->reconfiguration)
932             av_strlcatf(args, sizeof(args), ":first_pts=0");
933         AUTO_INSERT_FILTER_INPUT("-async", "aresample", args);
934     }
935
936 //     if (ost->audio_channels_mapped) {
937 //         int i;
938 //         AVBPrint pan_buf;
939 //         av_bprint_init(&pan_buf, 256, 8192);
940 //         av_bprintf(&pan_buf, "0x%"PRIx64,
941 //                    av_get_default_channel_layout(ost->audio_channels_mapped));
942 //         for (i = 0; i < ost->audio_channels_mapped; i++)
943 //             if (ost->audio_channels_map[i] != -1)
944 //                 av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
945 //         AUTO_INSERT_FILTER_INPUT("-map_channel", "pan", pan_buf.str);
946 //         av_bprint_finalize(&pan_buf, NULL);
947 //     }
948
949     if (audio_volume != 256) {
950         char args[256];
951
952         av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume "
953                "audio filter instead.\n");
954
955         snprintf(args, sizeof(args), "%f", audio_volume / 256.);
956         AUTO_INSERT_FILTER_INPUT("-vol", "volume", args);
957     }
958
959     snprintf(name, sizeof(name), "trim for input stream %d:%d",
960              ist->file_index, ist->st->index);
961     if (copy_ts) {
962         tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
963         if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
964             tsoffset += f->ctx->start_time;
965     }
966     ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
967                       AV_NOPTS_VALUE : tsoffset, f->recording_time,
968                       &last_filter, &pad_idx, name);
969     if (ret < 0)
970         return ret;
971
972     if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
973         return ret;
974
975     return 0;
976 }
977
978 static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
979                                   AVFilterInOut *in)
980 {
981     if (!ifilter->ist->dec) {
982         av_log(NULL, AV_LOG_ERROR,
983                "No decoder for stream #%d:%d, filtering impossible\n",
984                ifilter->ist->file_index, ifilter->ist->st->index);
985         return AVERROR_DECODER_NOT_FOUND;
986     }
987     switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
988     case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
989     case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
990     default: av_assert0(0);
991     }
992 }
993
994 static void cleanup_filtergraph(FilterGraph *fg)
995 {
996     int i;
997     for (i = 0; i < fg->nb_outputs; i++)
998         fg->outputs[i]->filter = (AVFilterContext *)NULL;
999     for (i = 0; i < fg->nb_inputs; i++)
1000         fg->inputs[i]->filter = (AVFilterContext *)NULL;
1001     avfilter_graph_free(&fg->graph);
1002 }
1003
1004 int configure_filtergraph(FilterGraph *fg)
1005 {
1006     AVFilterInOut *inputs, *outputs, *cur;
1007     int ret, i, simple = filtergraph_is_simple(fg);
1008     const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
1009                                       fg->graph_desc;
1010
1011     cleanup_filtergraph(fg);
1012     if (!(fg->graph = avfilter_graph_alloc()))
1013         return AVERROR(ENOMEM);
1014
1015     if (simple) {
1016         OutputStream *ost = fg->outputs[0]->ost;
1017         char args[512];
1018         AVDictionaryEntry *e = NULL;
1019
1020         fg->graph->nb_threads = filter_nbthreads;
1021
1022         args[0] = 0;
1023         while ((e = av_dict_get(ost->sws_dict, "", e,
1024                                 AV_DICT_IGNORE_SUFFIX))) {
1025             av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1026         }
1027         if (strlen(args))
1028             args[strlen(args)-1] = 0;
1029         fg->graph->scale_sws_opts = av_strdup(args);
1030
1031         args[0] = 0;
1032         while ((e = av_dict_get(ost->swr_opts, "", e,
1033                                 AV_DICT_IGNORE_SUFFIX))) {
1034             av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1035         }
1036         if (strlen(args))
1037             args[strlen(args)-1] = 0;
1038         av_opt_set(fg->graph, "aresample_swr_opts", args, 0);
1039
1040         args[0] = '\0';
1041         while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e,
1042                                 AV_DICT_IGNORE_SUFFIX))) {
1043             av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1044         }
1045         if (strlen(args))
1046             args[strlen(args) - 1] = '\0';
1047
1048         e = av_dict_get(ost->encoder_opts, "threads", NULL, 0);
1049         if (e)
1050             av_opt_set(fg->graph, "threads", e->value, 0);
1051     } else {
1052         fg->graph->nb_threads = filter_complex_nbthreads;
1053     }
1054
1055     if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
1056         goto fail;
1057
1058     if (filter_hw_device || hw_device_ctx) {
1059         AVBufferRef *device = filter_hw_device ? filter_hw_device->device_ref
1060                                                : hw_device_ctx;
1061         for (i = 0; i < fg->graph->nb_filters; i++) {
1062             fg->graph->filters[i]->hw_device_ctx = av_buffer_ref(device);
1063             if (!fg->graph->filters[i]->hw_device_ctx) {
1064                 ret = AVERROR(ENOMEM);
1065                 goto fail;
1066             }
1067         }
1068     }
1069
1070     if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
1071         const char *num_inputs;
1072         const char *num_outputs;
1073         if (!outputs) {
1074             num_outputs = "0";
1075         } else if (outputs->next) {
1076             num_outputs = ">1";
1077         } else {
1078             num_outputs = "1";
1079         }
1080         if (!inputs) {
1081             num_inputs = "0";
1082         } else if (inputs->next) {
1083             num_inputs = ">1";
1084         } else {
1085             num_inputs = "1";
1086         }
1087         av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' was expected "
1088                "to have exactly 1 input and 1 output."
1089                " However, it had %s input(s) and %s output(s)."
1090                " Please adjust, or use a complex filtergraph (-filter_complex) instead.\n",
1091                graph_desc, num_inputs, num_outputs);
1092         ret = AVERROR(EINVAL);
1093         goto fail;
1094     }
1095
1096     for (cur = inputs, i = 0; cur; cur = cur->next, i++)
1097         if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0) {
1098             avfilter_inout_free(&inputs);
1099             avfilter_inout_free(&outputs);
1100             goto fail;
1101         }
1102     avfilter_inout_free(&inputs);
1103
1104     for (cur = outputs, i = 0; cur; cur = cur->next, i++)
1105         configure_output_filter(fg, fg->outputs[i], cur);
1106     avfilter_inout_free(&outputs);
1107
1108     if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
1109         goto fail;
1110
1111     /* limit the lists of allowed formats to the ones selected, to
1112      * make sure they stay the same if the filtergraph is reconfigured later */
1113     for (i = 0; i < fg->nb_outputs; i++) {
1114         OutputFilter *ofilter = fg->outputs[i];
1115         AVFilterContext *sink = ofilter->filter;
1116
1117         ofilter->format = av_buffersink_get_format(sink);
1118
1119         ofilter->width  = av_buffersink_get_w(sink);
1120         ofilter->height = av_buffersink_get_h(sink);
1121
1122         ofilter->sample_rate    = av_buffersink_get_sample_rate(sink);
1123         ofilter->channel_layout = av_buffersink_get_channel_layout(sink);
1124     }
1125
1126     fg->reconfiguration = 1;
1127
1128     for (i = 0; i < fg->nb_outputs; i++) {
1129         OutputStream *ost = fg->outputs[i]->ost;
1130         if (!ost->enc) {
1131             /* identical to the same check in ffmpeg.c, needed because
1132                complex filter graphs are initialized earlier */
1133             av_log(NULL, AV_LOG_ERROR, "Encoder (codec %s) not found for output stream #%d:%d\n",
1134                      avcodec_get_name(ost->st->codecpar->codec_id), ost->file_index, ost->index);
1135             ret = AVERROR(EINVAL);
1136             goto fail;
1137         }
1138         if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1139             !(ost->enc->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE))
1140             av_buffersink_set_frame_size(ost->filter->filter,
1141                                          ost->enc_ctx->frame_size);
1142     }
1143
1144     for (i = 0; i < fg->nb_inputs; i++) {
1145         while (av_fifo_size(fg->inputs[i]->frame_queue)) {
1146             AVFrame *tmp;
1147             av_fifo_generic_read(fg->inputs[i]->frame_queue, &tmp, sizeof(tmp), NULL);
1148             ret = av_buffersrc_add_frame(fg->inputs[i]->filter, tmp);
1149             av_frame_free(&tmp);
1150             if (ret < 0)
1151                 goto fail;
1152         }
1153     }
1154
1155     /* send the EOFs for the finished inputs */
1156     for (i = 0; i < fg->nb_inputs; i++) {
1157         if (fg->inputs[i]->eof) {
1158             ret = av_buffersrc_add_frame(fg->inputs[i]->filter, NULL);
1159             if (ret < 0)
1160                 goto fail;
1161         }
1162     }
1163
1164     /* process queued up subtitle packets */
1165     for (i = 0; i < fg->nb_inputs; i++) {
1166         InputStream *ist = fg->inputs[i]->ist;
1167         if (ist->sub2video.sub_queue && ist->sub2video.frame) {
1168             while (av_fifo_size(ist->sub2video.sub_queue)) {
1169                 AVSubtitle tmp;
1170                 av_fifo_generic_read(ist->sub2video.sub_queue, &tmp, sizeof(tmp), NULL);
1171                 sub2video_update(ist, &tmp);
1172                 avsubtitle_free(&tmp);
1173             }
1174         }
1175     }
1176
1177     return 0;
1178
1179 fail:
1180     cleanup_filtergraph(fg);
1181     return ret;
1182 }
1183
1184 int ifilter_parameters_from_frame(InputFilter *ifilter, const AVFrame *frame)
1185 {
1186     av_buffer_unref(&ifilter->hw_frames_ctx);
1187
1188     ifilter->format = frame->format;
1189
1190     ifilter->width               = frame->width;
1191     ifilter->height              = frame->height;
1192     ifilter->sample_aspect_ratio = frame->sample_aspect_ratio;
1193
1194     ifilter->sample_rate         = frame->sample_rate;
1195     ifilter->channels            = frame->channels;
1196     ifilter->channel_layout      = frame->channel_layout;
1197
1198     if (frame->hw_frames_ctx) {
1199         ifilter->hw_frames_ctx = av_buffer_ref(frame->hw_frames_ctx);
1200         if (!ifilter->hw_frames_ctx)
1201             return AVERROR(ENOMEM);
1202     }
1203
1204     return 0;
1205 }
1206
1207 int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
1208 {
1209     int i;
1210     for (i = 0; i < fg->nb_inputs; i++)
1211         if (fg->inputs[i]->ist == ist)
1212             return 1;
1213     return 0;
1214 }
1215
1216 int filtergraph_is_simple(FilterGraph *fg)
1217 {
1218     return !fg->graph_desc;
1219 }