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