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