avformat/img2dec: timestamps are 64bit
[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 "ffmpeg.h"
22
23 #include "libavfilter/avfilter.h"
24 #include "libavfilter/buffersink.h"
25
26 #include "libavresample/avresample.h"
27
28 #include "libavutil/avassert.h"
29 #include "libavutil/avstring.h"
30 #include "libavutil/bprint.h"
31 #include "libavutil/channel_layout.h"
32 #include "libavutil/opt.h"
33 #include "libavutil/pixdesc.h"
34 #include "libavutil/pixfmt.h"
35 #include "libavutil/imgutils.h"
36 #include "libavutil/samplefmt.h"
37
38 enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodec *codec, enum AVPixelFormat target)
39 {
40     if (codec && codec->pix_fmts) {
41         const enum AVPixelFormat *p = codec->pix_fmts;
42         const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(target);
43         int has_alpha = desc ? desc->nb_components % 2 == 0 : 0;
44         enum AVPixelFormat best= AV_PIX_FMT_NONE;
45         if (st->codec->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
46             if (st->codec->codec_id == AV_CODEC_ID_MJPEG) {
47                 p = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_NONE };
48             } else if (st->codec->codec_id == AV_CODEC_ID_LJPEG) {
49                 p = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUV420P,
50                                                  AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_BGRA, AV_PIX_FMT_NONE };
51             }
52         }
53         for (; *p != AV_PIX_FMT_NONE; p++) {
54             best= avcodec_find_best_pix_fmt_of_2(best, *p, target, has_alpha, NULL);
55             if (*p == target)
56                 break;
57         }
58         if (*p == AV_PIX_FMT_NONE) {
59             if (target != AV_PIX_FMT_NONE)
60                 av_log(NULL, AV_LOG_WARNING,
61                        "Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
62                        av_get_pix_fmt_name(target),
63                        codec->name,
64                        av_get_pix_fmt_name(best));
65             return best;
66         }
67     }
68     return target;
69 }
70
71 void choose_sample_fmt(AVStream *st, AVCodec *codec)
72 {
73     if (codec && codec->sample_fmts) {
74         const enum AVSampleFormat *p = codec->sample_fmts;
75         for (; *p != -1; p++) {
76             if (*p == st->codec->sample_fmt)
77                 break;
78         }
79         if (*p == -1) {
80             if((codec->capabilities & CODEC_CAP_LOSSLESS) && av_get_sample_fmt_name(st->codec->sample_fmt) > av_get_sample_fmt_name(codec->sample_fmts[0]))
81                 av_log(NULL, AV_LOG_ERROR, "Conversion will not be lossless.\n");
82             if(av_get_sample_fmt_name(st->codec->sample_fmt))
83             av_log(NULL, AV_LOG_WARNING,
84                    "Incompatible sample format '%s' for codec '%s', auto-selecting format '%s'\n",
85                    av_get_sample_fmt_name(st->codec->sample_fmt),
86                    codec->name,
87                    av_get_sample_fmt_name(codec->sample_fmts[0]));
88             st->codec->sample_fmt = codec->sample_fmts[0];
89         }
90     }
91 }
92
93 static char *choose_pix_fmts(OutputStream *ost)
94 {
95      if (ost->keep_pix_fmt) {
96         if (ost->filter)
97             avfilter_graph_set_auto_convert(ost->filter->graph->graph,
98                                             AVFILTER_AUTO_CONVERT_NONE);
99         if (ost->st->codec->pix_fmt == AV_PIX_FMT_NONE)
100             return NULL;
101         return av_strdup(av_get_pix_fmt_name(ost->st->codec->pix_fmt));
102     }
103     if (ost->st->codec->pix_fmt != AV_PIX_FMT_NONE) {
104         return av_strdup(av_get_pix_fmt_name(choose_pixel_fmt(ost->st, ost->enc, ost->st->codec->pix_fmt)));
105     } else if (ost->enc && ost->enc->pix_fmts) {
106         const enum AVPixelFormat *p;
107         AVIOContext *s = NULL;
108         uint8_t *ret;
109         int len;
110
111         if (avio_open_dyn_buf(&s) < 0)
112             exit(1);
113
114         p = ost->enc->pix_fmts;
115         if (ost->st->codec->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
116             if (ost->st->codec->codec_id == AV_CODEC_ID_MJPEG) {
117                 p = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_NONE };
118             } else if (ost->st->codec->codec_id == AV_CODEC_ID_LJPEG) {
119                 p = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUV420P,
120                                                     AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_BGRA, AV_PIX_FMT_NONE };
121             }
122         }
123
124         for (; *p != AV_PIX_FMT_NONE; p++) {
125             const char *name = av_get_pix_fmt_name(*p);
126             avio_printf(s, "%s|", name);
127         }
128         len = avio_close_dyn_buf(s, &ret);
129         ret[len - 1] = 0;
130         return ret;
131     } else
132         return NULL;
133 }
134
135 /* Define a function for building a string containing a list of
136  * allowed formats. */
137 #define DEF_CHOOSE_FORMAT(type, var, supported_list, none, get_name)           \
138 static char *choose_ ## var ## s(OutputStream *ost)                            \
139 {                                                                              \
140     if (ost->st->codec->var != none) {                                         \
141         get_name(ost->st->codec->var);                                         \
142         return av_strdup(name);                                                \
143     } else if (ost->enc && ost->enc->supported_list) {                         \
144         const type *p;                                                         \
145         AVIOContext *s = NULL;                                                 \
146         uint8_t *ret;                                                          \
147         int len;                                                               \
148                                                                                \
149         if (avio_open_dyn_buf(&s) < 0)                                         \
150             exit(1);                                                           \
151                                                                                \
152         for (p = ost->enc->supported_list; *p != none; p++) {                  \
153             get_name(*p);                                                      \
154             avio_printf(s, "%s|", name);                                       \
155         }                                                                      \
156         len = avio_close_dyn_buf(s, &ret);                                     \
157         ret[len - 1] = 0;                                                      \
158         return ret;                                                            \
159     } else                                                                     \
160         return NULL;                                                           \
161 }
162
163 // DEF_CHOOSE_FORMAT(enum AVPixelFormat, pix_fmt, pix_fmts, AV_PIX_FMT_NONE,
164 //                   GET_PIX_FMT_NAME)
165
166 DEF_CHOOSE_FORMAT(enum AVSampleFormat, sample_fmt, sample_fmts,
167                   AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME)
168
169 DEF_CHOOSE_FORMAT(int, sample_rate, supported_samplerates, 0,
170                   GET_SAMPLE_RATE_NAME)
171
172 DEF_CHOOSE_FORMAT(uint64_t, channel_layout, channel_layouts, 0,
173                   GET_CH_LAYOUT_NAME)
174
175 FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost)
176 {
177     FilterGraph *fg = av_mallocz(sizeof(*fg));
178
179     if (!fg)
180         exit(1);
181     fg->index = nb_filtergraphs;
182
183     GROW_ARRAY(fg->outputs, fg->nb_outputs);
184     if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
185         exit(1);
186     fg->outputs[0]->ost   = ost;
187     fg->outputs[0]->graph = fg;
188
189     ost->filter = fg->outputs[0];
190
191     GROW_ARRAY(fg->inputs, fg->nb_inputs);
192     if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
193         exit(1);
194     fg->inputs[0]->ist   = ist;
195     fg->inputs[0]->graph = fg;
196
197     GROW_ARRAY(ist->filters, ist->nb_filters);
198     ist->filters[ist->nb_filters - 1] = fg->inputs[0];
199
200     GROW_ARRAY(filtergraphs, nb_filtergraphs);
201     filtergraphs[nb_filtergraphs - 1] = fg;
202
203     return fg;
204 }
205
206 static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
207 {
208     InputStream *ist = NULL;
209     enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
210     int i;
211
212     // TODO: support other filter types
213     if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
214         av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
215                "currently.\n");
216         exit(1);
217     }
218
219     if (in->name) {
220         AVFormatContext *s;
221         AVStream       *st = NULL;
222         char *p;
223         int file_idx = strtol(in->name, &p, 0);
224
225         if (file_idx < 0 || file_idx >= nb_input_files) {
226             av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtergraph description %s.\n",
227                    file_idx, fg->graph_desc);
228             exit(1);
229         }
230         s = input_files[file_idx]->ctx;
231
232         for (i = 0; i < s->nb_streams; i++) {
233             enum AVMediaType stream_type = s->streams[i]->codec->codec_type;
234             if (stream_type != type &&
235                 !(stream_type == AVMEDIA_TYPE_SUBTITLE &&
236                   type == AVMEDIA_TYPE_VIDEO /* sub2video hack */))
237                 continue;
238             if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
239                 st = s->streams[i];
240                 break;
241             }
242         }
243         if (!st) {
244             av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
245                    "matches no streams.\n", p, fg->graph_desc);
246             exit(1);
247         }
248         ist = input_streams[input_files[file_idx]->ist_index + st->index];
249     } else {
250         /* find the first unused stream of corresponding type */
251         for (i = 0; i < nb_input_streams; i++) {
252             ist = input_streams[i];
253             if (ist->st->codec->codec_type == type && ist->discard)
254                 break;
255         }
256         if (i == nb_input_streams) {
257             av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
258                    "unlabeled input pad %d on filter %s\n", in->pad_idx,
259                    in->filter_ctx->name);
260             exit(1);
261         }
262     }
263     av_assert0(ist);
264
265     ist->discard         = 0;
266     ist->decoding_needed++;
267     ist->st->discard = AVDISCARD_NONE;
268
269     GROW_ARRAY(fg->inputs, fg->nb_inputs);
270     if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
271         exit(1);
272     fg->inputs[fg->nb_inputs - 1]->ist   = ist;
273     fg->inputs[fg->nb_inputs - 1]->graph = fg;
274
275     GROW_ARRAY(ist->filters, ist->nb_filters);
276     ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
277 }
278
279 static int insert_trim(OutputStream *ost, AVFilterContext **last_filter, int *pad_idx)
280 {
281     OutputFile *of = output_files[ost->file_index];
282     AVFilterGraph *graph = (*last_filter)->graph;
283     AVFilterContext *ctx;
284     const AVFilter *trim;
285     const char *name = ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO ? "trim" : "atrim";
286     char filter_name[128];
287     int ret = 0;
288
289     if (of->recording_time == INT64_MAX && !of->start_time)
290         return 0;
291
292     // Use with duration and without output starttime is buggy with trim filters
293     if (!of->start_time)
294         return 0;
295
296     trim = avfilter_get_by_name(name);
297     if (!trim) {
298         av_log(NULL, AV_LOG_ERROR, "%s filter not present, cannot limit "
299                "recording time.\n", name);
300         return AVERROR_FILTER_NOT_FOUND;
301     }
302
303     snprintf(filter_name, sizeof(filter_name), "%s for output stream %d:%d",
304              name, ost->file_index, ost->index);
305     ctx = avfilter_graph_alloc_filter(graph, trim, filter_name);
306     if (!ctx)
307         return AVERROR(ENOMEM);
308
309     if (of->recording_time != INT64_MAX) {
310         ret = av_opt_set_double(ctx, "duration", (double)of->recording_time / 1e6,
311                                 AV_OPT_SEARCH_CHILDREN);
312     }
313     if (ret >= 0 && of->start_time) {
314         ret = av_opt_set_double(ctx, "start", (double)of->start_time / 1e6,
315                                 AV_OPT_SEARCH_CHILDREN);
316     }
317     if (ret < 0) {
318         av_log(ctx, AV_LOG_ERROR, "Error configuring the %s filter", name);
319         return ret;
320     }
321
322     ret = avfilter_init_str(ctx, NULL);
323     if (ret < 0)
324         return ret;
325
326     ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
327     if (ret < 0)
328         return ret;
329
330     *last_filter = ctx;
331     *pad_idx     = 0;
332     return 0;
333 }
334
335 static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
336 {
337     char *pix_fmts;
338     OutputStream *ost = ofilter->ost;
339     AVCodecContext *codec = ost->st->codec;
340     AVFilterContext *last_filter = out->filter_ctx;
341     int pad_idx = out->pad_idx;
342     int ret;
343     char name[255];
344
345     snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
346     ret = avfilter_graph_create_filter(&ofilter->filter,
347                                        avfilter_get_by_name("buffersink"),
348                                        name, NULL, NULL, fg->graph);
349
350     if (ret < 0)
351         return ret;
352
353     if (codec->width || codec->height) {
354         char args[255];
355         AVFilterContext *filter;
356
357         snprintf(args, sizeof(args), "%d:%d:0x%X",
358                  codec->width,
359                  codec->height,
360                  (unsigned)ost->sws_flags);
361         snprintf(name, sizeof(name), "scaler for output stream %d:%d",
362                  ost->file_index, ost->index);
363         if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
364                                                 name, args, NULL, fg->graph)) < 0)
365             return ret;
366         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
367             return ret;
368
369         last_filter = filter;
370         pad_idx = 0;
371     }
372
373     if ((pix_fmts = choose_pix_fmts(ost))) {
374         AVFilterContext *filter;
375         snprintf(name, sizeof(name), "pixel format for output stream %d:%d",
376                  ost->file_index, ost->index);
377         ret = avfilter_graph_create_filter(&filter,
378                                                 avfilter_get_by_name("format"),
379                                                 "format", pix_fmts, NULL,
380                                                 fg->graph);
381         av_freep(&pix_fmts);
382         if (ret < 0)
383             return ret;
384         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
385             return ret;
386
387         last_filter = filter;
388         pad_idx     = 0;
389     }
390
391     if (ost->frame_rate.num && 0) {
392         AVFilterContext *fps;
393         char args[255];
394
395         snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
396                  ost->frame_rate.den);
397         snprintf(name, sizeof(name), "fps for output stream %d:%d",
398                  ost->file_index, ost->index);
399         ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
400                                            name, args, NULL, fg->graph);
401         if (ret < 0)
402             return ret;
403
404         ret = avfilter_link(last_filter, pad_idx, fps, 0);
405         if (ret < 0)
406             return ret;
407         last_filter = fps;
408         pad_idx = 0;
409     }
410
411     ret = insert_trim(ost, &last_filter, &pad_idx);
412     if (ret < 0)
413         return ret;
414
415
416     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
417         return ret;
418
419     return 0;
420 }
421
422 static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
423 {
424     OutputStream *ost = ofilter->ost;
425     AVCodecContext *codec  = ost->st->codec;
426     AVFilterContext *last_filter = out->filter_ctx;
427     OutputFile *of = output_files[ost->file_index];
428     int pad_idx = out->pad_idx;
429     char *sample_fmts, *sample_rates, *channel_layouts;
430     char name[255];
431     int ret;
432
433     snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
434     ret = avfilter_graph_create_filter(&ofilter->filter,
435                                        avfilter_get_by_name("abuffersink"),
436                                        name, NULL, NULL, fg->graph);
437     if (ret < 0)
438         return ret;
439     if ((ret = av_opt_set_int(ofilter->filter, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
440         return ret;
441
442 #define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do {                 \
443     AVFilterContext *filt_ctx;                                              \
444                                                                             \
445     av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi "            \
446            "similarly to -af " filter_name "=%s.\n", arg);                  \
447                                                                             \
448     ret = avfilter_graph_create_filter(&filt_ctx,                           \
449                                        avfilter_get_by_name(filter_name),   \
450                                        filter_name, arg, NULL, fg->graph);  \
451     if (ret < 0)                                                            \
452         return ret;                                                         \
453                                                                             \
454     ret = avfilter_link(last_filter, pad_idx, filt_ctx, 0);                 \
455     if (ret < 0)                                                            \
456         return ret;                                                         \
457                                                                             \
458     last_filter = filt_ctx;                                                 \
459     pad_idx = 0;                                                            \
460 } while (0)
461     if (ost->audio_channels_mapped) {
462         int i;
463         AVBPrint pan_buf;
464         av_bprint_init(&pan_buf, 256, 8192);
465         av_bprintf(&pan_buf, "0x%"PRIx64,
466                    av_get_default_channel_layout(ost->audio_channels_mapped));
467         for (i = 0; i < ost->audio_channels_mapped; i++)
468             if (ost->audio_channels_map[i] != -1)
469                 av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
470
471         AUTO_INSERT_FILTER("-map_channel", "pan", pan_buf.str);
472         av_bprint_finalize(&pan_buf, NULL);
473     }
474
475     if (codec->channels && !codec->channel_layout)
476         codec->channel_layout = av_get_default_channel_layout(codec->channels);
477
478     sample_fmts     = choose_sample_fmts(ost);
479     sample_rates    = choose_sample_rates(ost);
480     channel_layouts = choose_channel_layouts(ost);
481     if (sample_fmts || sample_rates || channel_layouts) {
482         AVFilterContext *format;
483         char args[256];
484         args[0] = 0;
485
486         if (sample_fmts)
487             av_strlcatf(args, sizeof(args), "sample_fmts=%s:",
488                             sample_fmts);
489         if (sample_rates)
490             av_strlcatf(args, sizeof(args), "sample_rates=%s:",
491                             sample_rates);
492         if (channel_layouts)
493             av_strlcatf(args, sizeof(args), "channel_layouts=%s:",
494                             channel_layouts);
495
496         av_freep(&sample_fmts);
497         av_freep(&sample_rates);
498         av_freep(&channel_layouts);
499
500         snprintf(name, sizeof(name), "audio format for output stream %d:%d",
501                  ost->file_index, ost->index);
502         ret = avfilter_graph_create_filter(&format,
503                                            avfilter_get_by_name("aformat"),
504                                            name, args, NULL, fg->graph);
505         if (ret < 0)
506             return ret;
507
508         ret = avfilter_link(last_filter, pad_idx, format, 0);
509         if (ret < 0)
510             return ret;
511
512         last_filter = format;
513         pad_idx = 0;
514     }
515
516     if (audio_volume != 256 && 0) {
517         char args[256];
518
519         snprintf(args, sizeof(args), "%f", audio_volume / 256.);
520         AUTO_INSERT_FILTER("-vol", "volume", args);
521     }
522
523     if (ost->apad && of->shortest) {
524         char args[256];
525         int i;
526
527         for (i=0; i<of->ctx->nb_streams; i++)
528             if (of->ctx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO)
529                 break;
530
531         if (i<of->ctx->nb_streams) {
532             snprintf(args, sizeof(args), "%s", ost->apad);
533             AUTO_INSERT_FILTER("-apad", "apad", args);
534         }
535     }
536
537     ret = insert_trim(ost, &last_filter, &pad_idx);
538     if (ret < 0)
539         return ret;
540
541     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
542         return ret;
543
544     return 0;
545 }
546
547 #define DESCRIBE_FILTER_LINK(f, inout, in)                         \
548 {                                                                  \
549     AVFilterContext *ctx = inout->filter_ctx;                      \
550     AVFilterPad *pads = in ? ctx->input_pads  : ctx->output_pads;  \
551     int       nb_pads = in ? ctx->input_count : ctx->output_count; \
552     AVIOContext *pb;                                               \
553                                                                    \
554     if (avio_open_dyn_buf(&pb) < 0)                                \
555         exit(1);                                                   \
556                                                                    \
557     avio_printf(pb, "%s", ctx->filter->name);                      \
558     if (nb_pads > 1)                                               \
559         avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));\
560     avio_w8(pb, 0);                                                \
561     avio_close_dyn_buf(pb, &f->name);                              \
562 }
563
564 int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
565 {
566     av_freep(&ofilter->name);
567     DESCRIBE_FILTER_LINK(ofilter, out, 0);
568
569     switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
570     case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
571     case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
572     default: av_assert0(0);
573     }
574 }
575
576 static int sub2video_prepare(InputStream *ist)
577 {
578     AVFormatContext *avf = input_files[ist->file_index]->ctx;
579     int i, w, h;
580
581     /* Compute the size of the canvas for the subtitles stream.
582        If the subtitles codec has set a size, use it. Otherwise use the
583        maximum dimensions of the video streams in the same file. */
584     w = ist->st->codec->width;
585     h = ist->st->codec->height;
586     if (!(w && h)) {
587         for (i = 0; i < avf->nb_streams; i++) {
588             if (avf->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
589                 w = FFMAX(w, avf->streams[i]->codec->width);
590                 h = FFMAX(h, avf->streams[i]->codec->height);
591             }
592         }
593         if (!(w && h)) {
594             w = FFMAX(w, 720);
595             h = FFMAX(h, 576);
596         }
597         av_log(avf, AV_LOG_INFO, "sub2video: using %dx%d canvas\n", w, h);
598     }
599     ist->sub2video.w = ist->st->codec->width  = ist->resample_width  = w;
600     ist->sub2video.h = ist->st->codec->height = ist->resample_height = h;
601
602     /* rectangles are AV_PIX_FMT_PAL8, but we have no guarantee that the
603        palettes for all rectangles are identical or compatible */
604     ist->resample_pix_fmt = ist->st->codec->pix_fmt = AV_PIX_FMT_RGB32;
605
606     ist->sub2video.frame = av_frame_alloc();
607     if (!ist->sub2video.frame)
608         return AVERROR(ENOMEM);
609     return 0;
610 }
611
612 static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
613                                         AVFilterInOut *in)
614 {
615     AVFilterContext *first_filter = in->filter_ctx;
616     AVFilter *filter = avfilter_get_by_name("buffer");
617     InputStream *ist = ifilter->ist;
618     AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
619                                          ist->st->time_base;
620     AVRational fr = ist->framerate;
621     AVRational sar;
622     AVBPrint args;
623     char name[255];
624     int pad_idx = in->pad_idx;
625     int ret;
626
627     if (!fr.num)
628         fr = av_guess_frame_rate(input_files[ist->file_index]->ctx, ist->st, NULL);
629
630     if (ist->st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
631         ret = sub2video_prepare(ist);
632         if (ret < 0)
633             return ret;
634     }
635
636     sar = ist->st->sample_aspect_ratio.num ?
637           ist->st->sample_aspect_ratio :
638           ist->st->codec->sample_aspect_ratio;
639     if(!sar.den)
640         sar = (AVRational){0,1};
641     av_bprint_init(&args, 0, 1);
642     av_bprintf(&args,
643              "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:"
644              "pixel_aspect=%d/%d:sws_param=flags=%d", ist->resample_width,
645              ist->resample_height, ist->resample_pix_fmt,
646              tb.num, tb.den, sar.num, sar.den,
647              SWS_BILINEAR + ((ist->st->codec->flags&CODEC_FLAG_BITEXACT) ? SWS_BITEXACT:0));
648     if (fr.num && fr.den)
649         av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
650     snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
651              ist->file_index, ist->st->index);
652
653     if ((ret = avfilter_graph_create_filter(&ifilter->filter, filter, name,
654                                             args.str, NULL, fg->graph)) < 0)
655         return ret;
656
657     if (ist->framerate.num) {
658         AVFilterContext *setpts;
659
660         snprintf(name, sizeof(name), "force CFR for input from stream %d:%d",
661                  ist->file_index, ist->st->index);
662         if ((ret = avfilter_graph_create_filter(&setpts,
663                                                 avfilter_get_by_name("setpts"),
664                                                 name, "N", NULL,
665                                                 fg->graph)) < 0)
666             return ret;
667
668         if ((ret = avfilter_link(setpts, 0, first_filter, pad_idx)) < 0)
669             return ret;
670
671         first_filter = setpts;
672         pad_idx = 0;
673     }
674
675     if (do_deinterlace) {
676         AVFilterContext *yadif;
677
678         snprintf(name, sizeof(name), "deinterlace input from stream %d:%d",
679                  ist->file_index, ist->st->index);
680         if ((ret = avfilter_graph_create_filter(&yadif,
681                                                 avfilter_get_by_name("yadif"),
682                                                 name, "", NULL,
683                                                 fg->graph)) < 0)
684             return ret;
685
686         if ((ret = avfilter_link(yadif, 0, first_filter, pad_idx)) < 0)
687             return ret;
688
689         first_filter = yadif;
690         pad_idx = 0;
691     }
692
693     if ((ret = avfilter_link(ifilter->filter, 0, first_filter, pad_idx)) < 0)
694         return ret;
695     return 0;
696 }
697
698 static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
699                                         AVFilterInOut *in)
700 {
701     AVFilterContext *first_filter = in->filter_ctx;
702     AVFilter *filter = avfilter_get_by_name("abuffer");
703     InputStream *ist = ifilter->ist;
704     int pad_idx = in->pad_idx;
705     AVBPrint args;
706     char name[255];
707     int ret;
708
709     av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
710     av_bprintf(&args, "time_base=%d/%d:sample_rate=%d:sample_fmt=%s",
711              1, ist->st->codec->sample_rate,
712              ist->st->codec->sample_rate,
713              av_get_sample_fmt_name(ist->st->codec->sample_fmt));
714     if (ist->st->codec->channel_layout)
715         av_bprintf(&args, ":channel_layout=0x%"PRIx64,
716                    ist->st->codec->channel_layout);
717     else
718         av_bprintf(&args, ":channels=%d", ist->st->codec->channels);
719     snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
720              ist->file_index, ist->st->index);
721
722     if ((ret = avfilter_graph_create_filter(&ifilter->filter, filter,
723                                             name, args.str, NULL,
724                                             fg->graph)) < 0)
725         return ret;
726
727 #define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg) do {                 \
728     AVFilterContext *filt_ctx;                                              \
729                                                                             \
730     av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi "            \
731            "similarly to -af " filter_name "=%s.\n", arg);                  \
732                                                                             \
733     snprintf(name, sizeof(name), "graph %d %s for input stream %d:%d",      \
734                 fg->index, filter_name, ist->file_index, ist->st->index);   \
735     ret = avfilter_graph_create_filter(&filt_ctx,                           \
736                                        avfilter_get_by_name(filter_name),   \
737                                        name, arg, NULL, fg->graph);         \
738     if (ret < 0)                                                            \
739         return ret;                                                         \
740                                                                             \
741     ret = avfilter_link(filt_ctx, 0, first_filter, pad_idx);                \
742     if (ret < 0)                                                            \
743         return ret;                                                         \
744                                                                             \
745     first_filter = filt_ctx;                                                  \
746 } while (0)
747
748     if (audio_sync_method > 0) {
749         char args[256] = {0};
750
751         av_strlcatf(args, sizeof(args), "async=%d", audio_sync_method);
752         if (audio_drift_threshold != 0.1)
753             av_strlcatf(args, sizeof(args), ":min_hard_comp=%f", audio_drift_threshold);
754         if (!fg->reconfiguration)
755             av_strlcatf(args, sizeof(args), ":first_pts=0");
756         AUTO_INSERT_FILTER_INPUT("-async", "aresample", args);
757     }
758
759 //     if (ost->audio_channels_mapped) {
760 //         int i;
761 //         AVBPrint pan_buf;
762 //         av_bprint_init(&pan_buf, 256, 8192);
763 //         av_bprintf(&pan_buf, "0x%"PRIx64,
764 //                    av_get_default_channel_layout(ost->audio_channels_mapped));
765 //         for (i = 0; i < ost->audio_channels_mapped; i++)
766 //             if (ost->audio_channels_map[i] != -1)
767 //                 av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
768 //         AUTO_INSERT_FILTER_INPUT("-map_channel", "pan", pan_buf.str);
769 //         av_bprint_finalize(&pan_buf, NULL);
770 //     }
771
772     if (audio_volume != 256) {
773         char args[256];
774
775         av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume "
776                "audio filter instead.\n");
777
778         snprintf(args, sizeof(args), "%f", audio_volume / 256.);
779         AUTO_INSERT_FILTER_INPUT("-vol", "volume", args);
780     }
781     if ((ret = avfilter_link(ifilter->filter, 0, first_filter, pad_idx)) < 0)
782         return ret;
783
784     return 0;
785 }
786
787 static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
788                                   AVFilterInOut *in)
789 {
790     av_freep(&ifilter->name);
791     DESCRIBE_FILTER_LINK(ifilter, in, 1);
792
793     switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
794     case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
795     case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
796     default: av_assert0(0);
797     }
798 }
799
800 int configure_filtergraph(FilterGraph *fg)
801 {
802     AVFilterInOut *inputs, *outputs, *cur;
803     int ret, i, init = !fg->graph, simple = !fg->graph_desc;
804     const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
805                                       fg->graph_desc;
806
807     avfilter_graph_free(&fg->graph);
808     if (!(fg->graph = avfilter_graph_alloc()))
809         return AVERROR(ENOMEM);
810
811     if (simple) {
812         OutputStream *ost = fg->outputs[0]->ost;
813         char args[512];
814         AVDictionaryEntry *e = NULL;
815
816         snprintf(args, sizeof(args), "flags=0x%X", (unsigned)ost->sws_flags);
817         fg->graph->scale_sws_opts = av_strdup(args);
818
819         args[0] = 0;
820         while ((e = av_dict_get(ost->swr_opts, "", e,
821                                 AV_DICT_IGNORE_SUFFIX))) {
822             av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
823         }
824         if (strlen(args))
825             args[strlen(args)-1] = 0;
826         av_opt_set(fg->graph, "aresample_swr_opts", args, 0);
827
828         args[0] = '\0';
829         while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e,
830                                 AV_DICT_IGNORE_SUFFIX))) {
831             av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
832         }
833         if (strlen(args))
834             args[strlen(args) - 1] = '\0';
835         fg->graph->resample_lavr_opts = av_strdup(args);
836     }
837
838     if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
839         return ret;
840
841     if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
842         av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' does not have "
843                "exactly one input and output.\n", graph_desc);
844         return AVERROR(EINVAL);
845     }
846
847     for (cur = inputs; !simple && init && cur; cur = cur->next)
848         init_input_filter(fg, cur);
849
850     for (cur = inputs, i = 0; cur; cur = cur->next, i++)
851         if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0)
852             return ret;
853     avfilter_inout_free(&inputs);
854
855     if (!init || simple) {
856         /* we already know the mappings between lavfi outputs and output streams,
857          * so we can finish the setup */
858         for (cur = outputs, i = 0; cur; cur = cur->next, i++)
859             configure_output_filter(fg, fg->outputs[i], cur);
860         avfilter_inout_free(&outputs);
861
862         if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
863             return ret;
864     } else {
865         /* wait until output mappings are processed */
866         for (cur = outputs; cur;) {
867             GROW_ARRAY(fg->outputs, fg->nb_outputs);
868             if (!(fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]))))
869                 exit(1);
870             fg->outputs[fg->nb_outputs - 1]->graph   = fg;
871             fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
872             cur = cur->next;
873             fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
874         }
875     }
876
877     fg->reconfiguration = 1;
878     return 0;
879 }
880
881 int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
882 {
883     int i;
884     for (i = 0; i < fg->nb_inputs; i++)
885         if (fg->inputs[i]->ist == ist)
886             return 1;
887     return 0;
888 }
889