lavf: Remove codec_tag from dashenc and smoothstreamingenc
[ffmpeg.git] / ffmpeg_filter.c
1 /*
2  * ffmpeg filter configuration
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20
21 #include <stdint.h>
22
23 #include "ffmpeg.h"
24
25 #include "libavfilter/avfilter.h"
26 #include "libavfilter/buffersink.h"
27 #include "libavfilter/buffersrc.h"
28
29 #include "libavresample/avresample.h"
30
31 #include "libavutil/avassert.h"
32 #include "libavutil/avstring.h"
33 #include "libavutil/bprint.h"
34 #include "libavutil/channel_layout.h"
35 #include "libavutil/display.h"
36 #include "libavutil/opt.h"
37 #include "libavutil/pixdesc.h"
38 #include "libavutil/pixfmt.h"
39 #include "libavutil/imgutils.h"
40 #include "libavutil/samplefmt.h"
41
42 static const enum AVPixelFormat *get_compliance_unofficial_pix_fmts(enum AVCodecID codec_id, const enum AVPixelFormat default_formats[])
43 {
44     static const enum AVPixelFormat mjpeg_formats[] =
45         { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P,
46           AV_PIX_FMT_YUV420P,  AV_PIX_FMT_YUV422P,  AV_PIX_FMT_YUV444P,
47           AV_PIX_FMT_NONE };
48     static const enum AVPixelFormat ljpeg_formats[] =
49         { AV_PIX_FMT_BGR24   , AV_PIX_FMT_BGRA    , AV_PIX_FMT_BGR0,
50           AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P,
51           AV_PIX_FMT_YUV420P , AV_PIX_FMT_YUV444P , AV_PIX_FMT_YUV422P,
52           AV_PIX_FMT_NONE};
53
54     if (codec_id == AV_CODEC_ID_MJPEG) {
55         return mjpeg_formats;
56     } else if (codec_id == AV_CODEC_ID_LJPEG) {
57         return ljpeg_formats;
58     } else {
59         return default_formats;
60     }
61 }
62
63 enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodecContext *enc_ctx, AVCodec *codec, enum AVPixelFormat target)
64 {
65     if (codec && codec->pix_fmts) {
66         const enum AVPixelFormat *p = codec->pix_fmts;
67         const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(target);
68         int has_alpha = desc ? desc->nb_components % 2 == 0 : 0;
69         enum AVPixelFormat best= AV_PIX_FMT_NONE;
70
71         if (enc_ctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
72             p = get_compliance_unofficial_pix_fmts(enc_ctx->codec_id, p);
73         }
74         for (; *p != AV_PIX_FMT_NONE; p++) {
75             best= avcodec_find_best_pix_fmt_of_2(best, *p, target, has_alpha, NULL);
76             if (*p == target)
77                 break;
78         }
79         if (*p == AV_PIX_FMT_NONE) {
80             if (target != AV_PIX_FMT_NONE)
81                 av_log(NULL, AV_LOG_WARNING,
82                        "Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
83                        av_get_pix_fmt_name(target),
84                        codec->name,
85                        av_get_pix_fmt_name(best));
86             return best;
87         }
88     }
89     return target;
90 }
91
92 void choose_sample_fmt(AVStream *st, AVCodec *codec)
93 {
94     if (codec && codec->sample_fmts) {
95         const enum AVSampleFormat *p = codec->sample_fmts;
96         for (; *p != -1; p++) {
97             if (*p == st->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
344     ret = avfilter_graph_parse2(graph, fg->graph_desc, &inputs, &outputs);
345     if (ret < 0)
346         goto fail;
347
348     for (cur = inputs; cur; cur = cur->next)
349         init_input_filter(fg, cur);
350
351     for (cur = outputs; cur;) {
352         GROW_ARRAY(fg->outputs, fg->nb_outputs);
353         fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]));
354         if (!fg->outputs[fg->nb_outputs - 1])
355             exit_program(1);
356
357         fg->outputs[fg->nb_outputs - 1]->graph   = fg;
358         fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
359         fg->outputs[fg->nb_outputs - 1]->type    = avfilter_pad_get_type(cur->filter_ctx->output_pads,
360                                                                          cur->pad_idx);
361         fg->outputs[fg->nb_outputs - 1]->name = describe_filter_link(fg, cur, 0);
362         cur = cur->next;
363         fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
364     }
365
366 fail:
367     avfilter_inout_free(&inputs);
368     avfilter_graph_free(&graph);
369     return ret;
370 }
371
372 static int insert_trim(int64_t start_time, int64_t duration,
373                        AVFilterContext **last_filter, int *pad_idx,
374                        const char *filter_name)
375 {
376     AVFilterGraph *graph = (*last_filter)->graph;
377     AVFilterContext *ctx;
378     const AVFilter *trim;
379     enum AVMediaType type = avfilter_pad_get_type((*last_filter)->output_pads, *pad_idx);
380     const char *name = (type == AVMEDIA_TYPE_VIDEO) ? "trim" : "atrim";
381     int ret = 0;
382
383     if (duration == INT64_MAX && start_time == AV_NOPTS_VALUE)
384         return 0;
385
386     trim = avfilter_get_by_name(name);
387     if (!trim) {
388         av_log(NULL, AV_LOG_ERROR, "%s filter not present, cannot limit "
389                "recording time.\n", name);
390         return AVERROR_FILTER_NOT_FOUND;
391     }
392
393     ctx = avfilter_graph_alloc_filter(graph, trim, filter_name);
394     if (!ctx)
395         return AVERROR(ENOMEM);
396
397     if (duration != INT64_MAX) {
398         ret = av_opt_set_int(ctx, "durationi", duration,
399                                 AV_OPT_SEARCH_CHILDREN);
400     }
401     if (ret >= 0 && start_time != AV_NOPTS_VALUE) {
402         ret = av_opt_set_int(ctx, "starti", start_time,
403                                 AV_OPT_SEARCH_CHILDREN);
404     }
405     if (ret < 0) {
406         av_log(ctx, AV_LOG_ERROR, "Error configuring the %s filter", name);
407         return ret;
408     }
409
410     ret = avfilter_init_str(ctx, NULL);
411     if (ret < 0)
412         return ret;
413
414     ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
415     if (ret < 0)
416         return ret;
417
418     *last_filter = ctx;
419     *pad_idx     = 0;
420     return 0;
421 }
422
423 static int insert_filter(AVFilterContext **last_filter, int *pad_idx,
424                          const char *filter_name, const char *args)
425 {
426     AVFilterGraph *graph = (*last_filter)->graph;
427     AVFilterContext *ctx;
428     int ret;
429
430     ret = avfilter_graph_create_filter(&ctx,
431                                        avfilter_get_by_name(filter_name),
432                                        filter_name, args, NULL, graph);
433     if (ret < 0)
434         return ret;
435
436     ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
437     if (ret < 0)
438         return ret;
439
440     *last_filter = ctx;
441     *pad_idx     = 0;
442     return 0;
443 }
444
445 static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
446 {
447     char *pix_fmts;
448     OutputStream *ost = ofilter->ost;
449     OutputFile    *of = output_files[ost->file_index];
450     AVFilterContext *last_filter = out->filter_ctx;
451     int pad_idx = out->pad_idx;
452     int ret;
453     char name[255];
454
455     snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
456     ret = avfilter_graph_create_filter(&ofilter->filter,
457                                        avfilter_get_by_name("buffersink"),
458                                        name, NULL, NULL, fg->graph);
459
460     if (ret < 0)
461         return ret;
462
463     if (ofilter->width || ofilter->height) {
464         char args[255];
465         AVFilterContext *filter;
466         AVDictionaryEntry *e = NULL;
467
468         snprintf(args, sizeof(args), "%d:%d",
469                  ofilter->width, ofilter->height);
470
471         while ((e = av_dict_get(ost->sws_dict, "", e,
472                                 AV_DICT_IGNORE_SUFFIX))) {
473             av_strlcatf(args, sizeof(args), ":%s=%s", e->key, e->value);
474         }
475
476         snprintf(name, sizeof(name), "scaler_out_%d_%d",
477                  ost->file_index, ost->index);
478         if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
479                                                 name, args, NULL, fg->graph)) < 0)
480             return ret;
481         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
482             return ret;
483
484         last_filter = filter;
485         pad_idx = 0;
486     }
487
488     if ((pix_fmts = choose_pix_fmts(ofilter))) {
489         AVFilterContext *filter;
490         snprintf(name, sizeof(name), "format_out_%d_%d",
491                  ost->file_index, ost->index);
492         ret = avfilter_graph_create_filter(&filter,
493                                            avfilter_get_by_name("format"),
494                                            "format", pix_fmts, NULL, fg->graph);
495         av_freep(&pix_fmts);
496         if (ret < 0)
497             return ret;
498         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
499             return ret;
500
501         last_filter = filter;
502         pad_idx     = 0;
503     }
504
505     if (ost->frame_rate.num && 0) {
506         AVFilterContext *fps;
507         char args[255];
508
509         snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
510                  ost->frame_rate.den);
511         snprintf(name, sizeof(name), "fps_out_%d_%d",
512                  ost->file_index, ost->index);
513         ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
514                                            name, args, NULL, fg->graph);
515         if (ret < 0)
516             return ret;
517
518         ret = avfilter_link(last_filter, pad_idx, fps, 0);
519         if (ret < 0)
520             return ret;
521         last_filter = fps;
522         pad_idx = 0;
523     }
524
525     snprintf(name, sizeof(name), "trim_out_%d_%d",
526              ost->file_index, ost->index);
527     ret = insert_trim(of->start_time, of->recording_time,
528                       &last_filter, &pad_idx, name);
529     if (ret < 0)
530         return ret;
531
532
533     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
534         return ret;
535
536     return 0;
537 }
538
539 static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
540 {
541     OutputStream *ost = ofilter->ost;
542     OutputFile    *of = output_files[ost->file_index];
543     AVCodecContext *codec  = ost->enc_ctx;
544     AVFilterContext *last_filter = out->filter_ctx;
545     int pad_idx = out->pad_idx;
546     char *sample_fmts, *sample_rates, *channel_layouts;
547     char name[255];
548     int ret;
549
550     snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
551     ret = avfilter_graph_create_filter(&ofilter->filter,
552                                        avfilter_get_by_name("abuffersink"),
553                                        name, NULL, NULL, fg->graph);
554     if (ret < 0)
555         return ret;
556     if ((ret = av_opt_set_int(ofilter->filter, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
557         return ret;
558
559 #define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do {                 \
560     AVFilterContext *filt_ctx;                                              \
561                                                                             \
562     av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi "            \
563            "similarly to -af " filter_name "=%s.\n", arg);                  \
564                                                                             \
565     ret = avfilter_graph_create_filter(&filt_ctx,                           \
566                                        avfilter_get_by_name(filter_name),   \
567                                        filter_name, arg, NULL, fg->graph);  \
568     if (ret < 0)                                                            \
569         return ret;                                                         \
570                                                                             \
571     ret = avfilter_link(last_filter, pad_idx, filt_ctx, 0);                 \
572     if (ret < 0)                                                            \
573         return ret;                                                         \
574                                                                             \
575     last_filter = filt_ctx;                                                 \
576     pad_idx = 0;                                                            \
577 } while (0)
578     if (ost->audio_channels_mapped) {
579         int i;
580         AVBPrint pan_buf;
581         av_bprint_init(&pan_buf, 256, 8192);
582         av_bprintf(&pan_buf, "0x%"PRIx64,
583                    av_get_default_channel_layout(ost->audio_channels_mapped));
584         for (i = 0; i < ost->audio_channels_mapped; i++)
585             if (ost->audio_channels_map[i] != -1)
586                 av_bprintf(&pan_buf, "|c%d=c%d", i, ost->audio_channels_map[i]);
587
588         AUTO_INSERT_FILTER("-map_channel", "pan", pan_buf.str);
589         av_bprint_finalize(&pan_buf, NULL);
590     }
591
592     if (codec->channels && !codec->channel_layout)
593         codec->channel_layout = av_get_default_channel_layout(codec->channels);
594
595     sample_fmts     = choose_sample_fmts(ofilter);
596     sample_rates    = choose_sample_rates(ofilter);
597     channel_layouts = choose_channel_layouts(ofilter);
598     if (sample_fmts || sample_rates || channel_layouts) {
599         AVFilterContext *format;
600         char args[256];
601         args[0] = 0;
602
603         if (sample_fmts)
604             av_strlcatf(args, sizeof(args), "sample_fmts=%s:",
605                             sample_fmts);
606         if (sample_rates)
607             av_strlcatf(args, sizeof(args), "sample_rates=%s:",
608                             sample_rates);
609         if (channel_layouts)
610             av_strlcatf(args, sizeof(args), "channel_layouts=%s:",
611                             channel_layouts);
612
613         av_freep(&sample_fmts);
614         av_freep(&sample_rates);
615         av_freep(&channel_layouts);
616
617         snprintf(name, sizeof(name), "format_out_%d_%d",
618                  ost->file_index, ost->index);
619         ret = avfilter_graph_create_filter(&format,
620                                            avfilter_get_by_name("aformat"),
621                                            name, args, NULL, fg->graph);
622         if (ret < 0)
623             return ret;
624
625         ret = avfilter_link(last_filter, pad_idx, format, 0);
626         if (ret < 0)
627             return ret;
628
629         last_filter = format;
630         pad_idx = 0;
631     }
632
633     if (audio_volume != 256 && 0) {
634         char args[256];
635
636         snprintf(args, sizeof(args), "%f", audio_volume / 256.);
637         AUTO_INSERT_FILTER("-vol", "volume", args);
638     }
639
640     if (ost->apad && of->shortest) {
641         char args[256];
642         int i;
643
644         for (i=0; i<of->ctx->nb_streams; i++)
645             if (of->ctx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
646                 break;
647
648         if (i<of->ctx->nb_streams) {
649             snprintf(args, sizeof(args), "%s", ost->apad);
650             AUTO_INSERT_FILTER("-apad", "apad", args);
651         }
652     }
653
654     snprintf(name, sizeof(name), "trim for output stream %d:%d",
655              ost->file_index, ost->index);
656     ret = insert_trim(of->start_time, of->recording_time,
657                       &last_filter, &pad_idx, name);
658     if (ret < 0)
659         return ret;
660
661     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
662         return ret;
663
664     return 0;
665 }
666
667 int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
668 {
669     if (!ofilter->ost) {
670         av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", ofilter->name);
671         exit_program(1);
672     }
673
674     switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
675     case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
676     case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
677     default: av_assert0(0);
678     }
679 }
680
681 void check_filter_outputs(void)
682 {
683     int i;
684     for (i = 0; i < nb_filtergraphs; i++) {
685         int n;
686         for (n = 0; n < filtergraphs[i]->nb_outputs; n++) {
687             OutputFilter *output = filtergraphs[i]->outputs[n];
688             if (!output->ost) {
689                 av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", output->name);
690                 exit_program(1);
691             }
692         }
693     }
694 }
695
696 static int sub2video_prepare(InputStream *ist, InputFilter *ifilter)
697 {
698     AVFormatContext *avf = input_files[ist->file_index]->ctx;
699     int i, w, h;
700
701     /* Compute the size of the canvas for the subtitles stream.
702        If the subtitles codecpar has set a size, use it. Otherwise use the
703        maximum dimensions of the video streams in the same file. */
704     w = ifilter->width;
705     h = ifilter->height;
706     if (!(w && h)) {
707         for (i = 0; i < avf->nb_streams; i++) {
708             if (avf->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
709                 w = FFMAX(w, avf->streams[i]->codecpar->width);
710                 h = FFMAX(h, avf->streams[i]->codecpar->height);
711             }
712         }
713         if (!(w && h)) {
714             w = FFMAX(w, 720);
715             h = FFMAX(h, 576);
716         }
717         av_log(avf, AV_LOG_INFO, "sub2video: using %dx%d canvas\n", w, h);
718     }
719     ist->sub2video.w = ifilter->width  = w;
720     ist->sub2video.h = ifilter->height = h;
721
722     ifilter->width  = ist->dec_ctx->width  ? ist->dec_ctx->width  : ist->sub2video.w;
723     ifilter->height = ist->dec_ctx->height ? ist->dec_ctx->height : ist->sub2video.h;
724
725     /* rectangles are AV_PIX_FMT_PAL8, but we have no guarantee that the
726        palettes for all rectangles are identical or compatible */
727     ifilter->format = AV_PIX_FMT_RGB32;
728
729     ist->sub2video.frame = av_frame_alloc();
730     if (!ist->sub2video.frame)
731         return AVERROR(ENOMEM);
732     ist->sub2video.last_pts = INT64_MIN;
733     return 0;
734 }
735
736 static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
737                                         AVFilterInOut *in)
738 {
739     AVFilterContext *last_filter;
740     const AVFilter *buffer_filt = avfilter_get_by_name("buffer");
741     InputStream *ist = ifilter->ist;
742     InputFile     *f = input_files[ist->file_index];
743     AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
744                                          ist->st->time_base;
745     AVRational fr = ist->framerate;
746     AVRational sar;
747     AVBPrint args;
748     char name[255];
749     int ret, pad_idx = 0;
750     int64_t tsoffset = 0;
751     AVBufferSrcParameters *par = av_buffersrc_parameters_alloc();
752
753     if (!par)
754         return AVERROR(ENOMEM);
755     memset(par, 0, sizeof(*par));
756     par->format = AV_PIX_FMT_NONE;
757
758     if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
759         av_log(NULL, AV_LOG_ERROR, "Cannot connect video filter to audio input\n");
760         ret = AVERROR(EINVAL);
761         goto fail;
762     }
763
764     if (!fr.num)
765         fr = av_guess_frame_rate(input_files[ist->file_index]->ctx, ist->st, NULL);
766
767     if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
768         ret = sub2video_prepare(ist, ifilter);
769         if (ret < 0)
770             goto fail;
771     }
772
773     sar = ifilter->sample_aspect_ratio;
774     if(!sar.den)
775         sar = (AVRational){0,1};
776     av_bprint_init(&args, 0, 1);
777     av_bprintf(&args,
778              "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:"
779              "pixel_aspect=%d/%d:sws_param=flags=%d",
780              ifilter->width, ifilter->height, ifilter->format,
781              tb.num, tb.den, sar.num, sar.den,
782              SWS_BILINEAR + ((ist->dec_ctx->flags&AV_CODEC_FLAG_BITEXACT) ? SWS_BITEXACT:0));
783     if (fr.num && fr.den)
784         av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
785     snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
786              ist->file_index, ist->st->index);
787
788
789     if ((ret = avfilter_graph_create_filter(&ifilter->filter, buffer_filt, name,
790                                             args.str, NULL, fg->graph)) < 0)
791         goto fail;
792     par->hw_frames_ctx = ifilter->hw_frames_ctx;
793     ret = av_buffersrc_parameters_set(ifilter->filter, par);
794     if (ret < 0)
795         goto fail;
796     av_freep(&par);
797     last_filter = ifilter->filter;
798
799     if (ist->autorotate) {
800         double theta = get_rotation(ist->st);
801
802         if (fabs(theta - 90) < 1.0) {
803             ret = insert_filter(&last_filter, &pad_idx, "transpose", "clock");
804         } else if (fabs(theta - 180) < 1.0) {
805             ret = insert_filter(&last_filter, &pad_idx, "hflip", NULL);
806             if (ret < 0)
807                 return ret;
808             ret = insert_filter(&last_filter, &pad_idx, "vflip", NULL);
809         } else if (fabs(theta - 270) < 1.0) {
810             ret = insert_filter(&last_filter, &pad_idx, "transpose", "cclock");
811         } else if (fabs(theta) > 1.0) {
812             char rotate_buf[64];
813             snprintf(rotate_buf, sizeof(rotate_buf), "%f*PI/180", theta);
814             ret = insert_filter(&last_filter, &pad_idx, "rotate", rotate_buf);
815         }
816         if (ret < 0)
817             return ret;
818     }
819
820     if (do_deinterlace) {
821         AVFilterContext *yadif;
822
823         snprintf(name, sizeof(name), "deinterlace_in_%d_%d",
824                  ist->file_index, ist->st->index);
825         if ((ret = avfilter_graph_create_filter(&yadif,
826                                                 avfilter_get_by_name("yadif"),
827                                                 name, "", NULL,
828                                                 fg->graph)) < 0)
829             return ret;
830
831         if ((ret = avfilter_link(last_filter, 0, yadif, 0)) < 0)
832             return ret;
833
834         last_filter = yadif;
835     }
836
837     snprintf(name, sizeof(name), "trim_in_%d_%d",
838              ist->file_index, ist->st->index);
839     if (copy_ts) {
840         tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
841         if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
842             tsoffset += f->ctx->start_time;
843     }
844     ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
845                       AV_NOPTS_VALUE : tsoffset, f->recording_time,
846                       &last_filter, &pad_idx, name);
847     if (ret < 0)
848         return ret;
849
850     if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
851         return ret;
852     return 0;
853 fail:
854     av_freep(&par);
855
856     return ret;
857 }
858
859 static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
860                                         AVFilterInOut *in)
861 {
862     AVFilterContext *last_filter;
863     const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer");
864     InputStream *ist = ifilter->ist;
865     InputFile     *f = input_files[ist->file_index];
866     AVBPrint args;
867     char name[255];
868     int ret, pad_idx = 0;
869     int64_t tsoffset = 0;
870
871     if (ist->dec_ctx->codec_type != AVMEDIA_TYPE_AUDIO) {
872         av_log(NULL, AV_LOG_ERROR, "Cannot connect audio filter to non audio input\n");
873         return AVERROR(EINVAL);
874     }
875
876     av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
877     av_bprintf(&args, "time_base=%d/%d:sample_rate=%d:sample_fmt=%s",
878              1, ifilter->sample_rate,
879              ifilter->sample_rate,
880              av_get_sample_fmt_name(ifilter->format));
881     if (ifilter->channel_layout)
882         av_bprintf(&args, ":channel_layout=0x%"PRIx64,
883                    ifilter->channel_layout);
884     else
885         av_bprintf(&args, ":channels=%d", ifilter->channels);
886     snprintf(name, sizeof(name), "graph_%d_in_%d_%d", fg->index,
887              ist->file_index, ist->st->index);
888
889     if ((ret = avfilter_graph_create_filter(&ifilter->filter, abuffer_filt,
890                                             name, args.str, NULL,
891                                             fg->graph)) < 0)
892         return ret;
893     last_filter = ifilter->filter;
894
895 #define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg) do {                 \
896     AVFilterContext *filt_ctx;                                              \
897                                                                             \
898     av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi "            \
899            "similarly to -af " filter_name "=%s.\n", arg);                  \
900                                                                             \
901     snprintf(name, sizeof(name), "graph_%d_%s_in_%d_%d",      \
902                 fg->index, filter_name, ist->file_index, ist->st->index);   \
903     ret = avfilter_graph_create_filter(&filt_ctx,                           \
904                                        avfilter_get_by_name(filter_name),   \
905                                        name, arg, NULL, fg->graph);         \
906     if (ret < 0)                                                            \
907         return ret;                                                         \
908                                                                             \
909     ret = avfilter_link(last_filter, 0, filt_ctx, 0);                       \
910     if (ret < 0)                                                            \
911         return ret;                                                         \
912                                                                             \
913     last_filter = filt_ctx;                                                 \
914 } while (0)
915
916     if (audio_sync_method > 0) {
917         char args[256] = {0};
918
919         av_strlcatf(args, sizeof(args), "async=%d", audio_sync_method);
920         if (audio_drift_threshold != 0.1)
921             av_strlcatf(args, sizeof(args), ":min_hard_comp=%f", audio_drift_threshold);
922         if (!fg->reconfiguration)
923             av_strlcatf(args, sizeof(args), ":first_pts=0");
924         AUTO_INSERT_FILTER_INPUT("-async", "aresample", args);
925     }
926
927 //     if (ost->audio_channels_mapped) {
928 //         int i;
929 //         AVBPrint pan_buf;
930 //         av_bprint_init(&pan_buf, 256, 8192);
931 //         av_bprintf(&pan_buf, "0x%"PRIx64,
932 //                    av_get_default_channel_layout(ost->audio_channels_mapped));
933 //         for (i = 0; i < ost->audio_channels_mapped; i++)
934 //             if (ost->audio_channels_map[i] != -1)
935 //                 av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
936 //         AUTO_INSERT_FILTER_INPUT("-map_channel", "pan", pan_buf.str);
937 //         av_bprint_finalize(&pan_buf, NULL);
938 //     }
939
940     if (audio_volume != 256) {
941         char args[256];
942
943         av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume "
944                "audio filter instead.\n");
945
946         snprintf(args, sizeof(args), "%f", audio_volume / 256.);
947         AUTO_INSERT_FILTER_INPUT("-vol", "volume", args);
948     }
949
950     snprintf(name, sizeof(name), "trim for input stream %d:%d",
951              ist->file_index, ist->st->index);
952     if (copy_ts) {
953         tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
954         if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
955             tsoffset += f->ctx->start_time;
956     }
957     ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
958                       AV_NOPTS_VALUE : tsoffset, f->recording_time,
959                       &last_filter, &pad_idx, name);
960     if (ret < 0)
961         return ret;
962
963     if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
964         return ret;
965
966     return 0;
967 }
968
969 static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
970                                   AVFilterInOut *in)
971 {
972     if (!ifilter->ist->dec) {
973         av_log(NULL, AV_LOG_ERROR,
974                "No decoder for stream #%d:%d, filtering impossible\n",
975                ifilter->ist->file_index, ifilter->ist->st->index);
976         return AVERROR_DECODER_NOT_FOUND;
977     }
978     switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
979     case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
980     case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
981     default: av_assert0(0);
982     }
983 }
984
985 static void cleanup_filtergraph(FilterGraph *fg)
986 {
987     int i;
988     for (i = 0; i < fg->nb_outputs; i++)
989         fg->outputs[i]->filter = (AVFilterContext *)NULL;
990     for (i = 0; i < fg->nb_inputs; i++)
991         fg->inputs[i]->filter = (AVFilterContext *)NULL;
992     avfilter_graph_free(&fg->graph);
993 }
994
995 int configure_filtergraph(FilterGraph *fg)
996 {
997     AVFilterInOut *inputs, *outputs, *cur;
998     int ret, i, simple = filtergraph_is_simple(fg);
999     const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
1000                                       fg->graph_desc;
1001
1002     cleanup_filtergraph(fg);
1003     if (!(fg->graph = avfilter_graph_alloc()))
1004         return AVERROR(ENOMEM);
1005
1006     if (simple) {
1007         OutputStream *ost = fg->outputs[0]->ost;
1008         char args[512];
1009         AVDictionaryEntry *e = NULL;
1010
1011         fg->graph->nb_threads = filter_nbthreads;
1012
1013         args[0] = 0;
1014         while ((e = av_dict_get(ost->sws_dict, "", e,
1015                                 AV_DICT_IGNORE_SUFFIX))) {
1016             av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1017         }
1018         if (strlen(args))
1019             args[strlen(args)-1] = 0;
1020         fg->graph->scale_sws_opts = av_strdup(args);
1021
1022         args[0] = 0;
1023         while ((e = av_dict_get(ost->swr_opts, "", e,
1024                                 AV_DICT_IGNORE_SUFFIX))) {
1025             av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1026         }
1027         if (strlen(args))
1028             args[strlen(args)-1] = 0;
1029         av_opt_set(fg->graph, "aresample_swr_opts", args, 0);
1030
1031         args[0] = '\0';
1032         while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e,
1033                                 AV_DICT_IGNORE_SUFFIX))) {
1034             av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1035         }
1036         if (strlen(args))
1037             args[strlen(args) - 1] = '\0';
1038
1039         e = av_dict_get(ost->encoder_opts, "threads", NULL, 0);
1040         if (e)
1041             av_opt_set(fg->graph, "threads", e->value, 0);
1042     } else {
1043         fg->graph->nb_threads = filter_complex_nbthreads;
1044     }
1045
1046     if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
1047         goto fail;
1048
1049     if (filter_hw_device || hw_device_ctx) {
1050         AVBufferRef *device = filter_hw_device ? filter_hw_device->device_ref
1051                                                : hw_device_ctx;
1052         for (i = 0; i < fg->graph->nb_filters; i++) {
1053             fg->graph->filters[i]->hw_device_ctx = av_buffer_ref(device);
1054             if (!fg->graph->filters[i]->hw_device_ctx) {
1055                 ret = AVERROR(ENOMEM);
1056                 goto fail;
1057             }
1058         }
1059     }
1060
1061     if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
1062         const char *num_inputs;
1063         const char *num_outputs;
1064         if (!outputs) {
1065             num_outputs = "0";
1066         } else if (outputs->next) {
1067             num_outputs = ">1";
1068         } else {
1069             num_outputs = "1";
1070         }
1071         if (!inputs) {
1072             num_inputs = "0";
1073         } else if (inputs->next) {
1074             num_inputs = ">1";
1075         } else {
1076             num_inputs = "1";
1077         }
1078         av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' was expected "
1079                "to have exactly 1 input and 1 output."
1080                " However, it had %s input(s) and %s output(s)."
1081                " Please adjust, or use a complex filtergraph (-filter_complex) instead.\n",
1082                graph_desc, num_inputs, num_outputs);
1083         ret = AVERROR(EINVAL);
1084         goto fail;
1085     }
1086
1087     for (cur = inputs, i = 0; cur; cur = cur->next, i++)
1088         if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0) {
1089             avfilter_inout_free(&inputs);
1090             avfilter_inout_free(&outputs);
1091             goto fail;
1092         }
1093     avfilter_inout_free(&inputs);
1094
1095     for (cur = outputs, i = 0; cur; cur = cur->next, i++)
1096         configure_output_filter(fg, fg->outputs[i], cur);
1097     avfilter_inout_free(&outputs);
1098
1099     if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
1100         goto fail;
1101
1102     /* limit the lists of allowed formats to the ones selected, to
1103      * make sure they stay the same if the filtergraph is reconfigured later */
1104     for (i = 0; i < fg->nb_outputs; i++) {
1105         OutputFilter *ofilter = fg->outputs[i];
1106         AVFilterContext *sink = ofilter->filter;
1107
1108         ofilter->format = av_buffersink_get_format(sink);
1109
1110         ofilter->width  = av_buffersink_get_w(sink);
1111         ofilter->height = av_buffersink_get_h(sink);
1112
1113         ofilter->sample_rate    = av_buffersink_get_sample_rate(sink);
1114         ofilter->channel_layout = av_buffersink_get_channel_layout(sink);
1115     }
1116
1117     fg->reconfiguration = 1;
1118
1119     for (i = 0; i < fg->nb_outputs; i++) {
1120         OutputStream *ost = fg->outputs[i]->ost;
1121         if (!ost->enc) {
1122             /* identical to the same check in ffmpeg.c, needed because
1123                complex filter graphs are initialized earlier */
1124             av_log(NULL, AV_LOG_ERROR, "Encoder (codec %s) not found for output stream #%d:%d\n",
1125                      avcodec_get_name(ost->st->codecpar->codec_id), ost->file_index, ost->index);
1126             ret = AVERROR(EINVAL);
1127             goto fail;
1128         }
1129         if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1130             !(ost->enc->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE))
1131             av_buffersink_set_frame_size(ost->filter->filter,
1132                                          ost->enc_ctx->frame_size);
1133     }
1134
1135     for (i = 0; i < fg->nb_inputs; i++) {
1136         while (av_fifo_size(fg->inputs[i]->frame_queue)) {
1137             AVFrame *tmp;
1138             av_fifo_generic_read(fg->inputs[i]->frame_queue, &tmp, sizeof(tmp), NULL);
1139             ret = av_buffersrc_add_frame(fg->inputs[i]->filter, tmp);
1140             av_frame_free(&tmp);
1141             if (ret < 0)
1142                 goto fail;
1143         }
1144     }
1145
1146     /* send the EOFs for the finished inputs */
1147     for (i = 0; i < fg->nb_inputs; i++) {
1148         if (fg->inputs[i]->eof) {
1149             ret = av_buffersrc_add_frame(fg->inputs[i]->filter, NULL);
1150             if (ret < 0)
1151                 goto fail;
1152         }
1153     }
1154
1155     /* process queued up subtitle packets */
1156     for (i = 0; i < fg->nb_inputs; i++) {
1157         InputStream *ist = fg->inputs[i]->ist;
1158         if (ist->sub2video.sub_queue && ist->sub2video.frame) {
1159             while (av_fifo_size(ist->sub2video.sub_queue)) {
1160                 AVSubtitle tmp;
1161                 av_fifo_generic_read(ist->sub2video.sub_queue, &tmp, sizeof(tmp), NULL);
1162                 sub2video_update(ist, &tmp);
1163                 avsubtitle_free(&tmp);
1164             }
1165         }
1166     }
1167
1168     return 0;
1169
1170 fail:
1171     cleanup_filtergraph(fg);
1172     return ret;
1173 }
1174
1175 int ifilter_parameters_from_frame(InputFilter *ifilter, const AVFrame *frame)
1176 {
1177     av_buffer_unref(&ifilter->hw_frames_ctx);
1178
1179     ifilter->format = frame->format;
1180
1181     ifilter->width               = frame->width;
1182     ifilter->height              = frame->height;
1183     ifilter->sample_aspect_ratio = frame->sample_aspect_ratio;
1184
1185     ifilter->sample_rate         = frame->sample_rate;
1186     ifilter->channels            = frame->channels;
1187     ifilter->channel_layout      = frame->channel_layout;
1188
1189     if (frame->hw_frames_ctx) {
1190         ifilter->hw_frames_ctx = av_buffer_ref(frame->hw_frames_ctx);
1191         if (!ifilter->hw_frames_ctx)
1192             return AVERROR(ENOMEM);
1193     }
1194
1195     return 0;
1196 }
1197
1198 int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
1199 {
1200     int i;
1201     for (i = 0; i < fg->nb_inputs; i++)
1202         if (fg->inputs[i]->ist == ist)
1203             return 1;
1204     return 0;
1205 }
1206
1207 int filtergraph_is_simple(FilterGraph *fg)
1208 {
1209     return !fg->graph_desc;
1210 }