2 * ffmpeg filter configuration
4 * This file is part of FFmpeg.
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.
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.
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
25 #include "libavfilter/avfilter.h"
26 #include "libavfilter/buffersink.h"
28 #include "libavresample/avresample.h"
30 #include "libavutil/avassert.h"
31 #include "libavutil/avstring.h"
32 #include "libavutil/bprint.h"
33 #include "libavutil/channel_layout.h"
34 #include "libavutil/opt.h"
35 #include "libavutil/pixdesc.h"
36 #include "libavutil/pixfmt.h"
37 #include "libavutil/imgutils.h"
38 #include "libavutil/samplefmt.h"
40 enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodec *codec, enum AVPixelFormat target)
42 if (codec && codec->pix_fmts) {
43 const enum AVPixelFormat *p = codec->pix_fmts;
44 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(target);
45 int has_alpha = desc ? desc->nb_components % 2 == 0 : 0;
46 enum AVPixelFormat best= AV_PIX_FMT_NONE;
47 if (st->codec->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
48 if (st->codec->codec_id == AV_CODEC_ID_MJPEG) {
49 p = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_NONE };
50 } else if (st->codec->codec_id == AV_CODEC_ID_LJPEG) {
51 p = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUV420P,
52 AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_BGRA, AV_PIX_FMT_NONE };
55 for (; *p != AV_PIX_FMT_NONE; p++) {
56 best= avcodec_find_best_pix_fmt_of_2(best, *p, target, has_alpha, NULL);
60 if (*p == AV_PIX_FMT_NONE) {
61 if (target != AV_PIX_FMT_NONE)
62 av_log(NULL, AV_LOG_WARNING,
63 "Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
64 av_get_pix_fmt_name(target),
66 av_get_pix_fmt_name(best));
73 void choose_sample_fmt(AVStream *st, AVCodec *codec)
75 if (codec && codec->sample_fmts) {
76 const enum AVSampleFormat *p = codec->sample_fmts;
77 for (; *p != -1; p++) {
78 if (*p == st->codec->sample_fmt)
82 if((codec->capabilities & CODEC_CAP_LOSSLESS) && av_get_sample_fmt_name(st->codec->sample_fmt) > av_get_sample_fmt_name(codec->sample_fmts[0]))
83 av_log(NULL, AV_LOG_ERROR, "Conversion will not be lossless.\n");
84 if(av_get_sample_fmt_name(st->codec->sample_fmt))
85 av_log(NULL, AV_LOG_WARNING,
86 "Incompatible sample format '%s' for codec '%s', auto-selecting format '%s'\n",
87 av_get_sample_fmt_name(st->codec->sample_fmt),
89 av_get_sample_fmt_name(codec->sample_fmts[0]));
90 st->codec->sample_fmt = codec->sample_fmts[0];
95 static char *choose_pix_fmts(OutputStream *ost)
97 AVDictionaryEntry *strict_dict = av_dict_get(ost->opts, "strict", NULL, 0);
99 // used by choose_pixel_fmt() and below
100 av_opt_set(ost->st->codec, "strict", strict_dict->value, 0);
102 if (ost->keep_pix_fmt) {
104 avfilter_graph_set_auto_convert(ost->filter->graph->graph,
105 AVFILTER_AUTO_CONVERT_NONE);
106 if (ost->st->codec->pix_fmt == AV_PIX_FMT_NONE)
108 return av_strdup(av_get_pix_fmt_name(ost->st->codec->pix_fmt));
110 if (ost->st->codec->pix_fmt != AV_PIX_FMT_NONE) {
111 return av_strdup(av_get_pix_fmt_name(choose_pixel_fmt(ost->st, ost->enc, ost->st->codec->pix_fmt)));
112 } else if (ost->enc && ost->enc->pix_fmts) {
113 const enum AVPixelFormat *p;
114 AVIOContext *s = NULL;
118 if (avio_open_dyn_buf(&s) < 0)
121 p = ost->enc->pix_fmts;
122 if (ost->st->codec->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
123 if (ost->st->codec->codec_id == AV_CODEC_ID_MJPEG) {
124 p = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_NONE };
125 } else if (ost->st->codec->codec_id == AV_CODEC_ID_LJPEG) {
126 p = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUV420P,
127 AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_BGRA, AV_PIX_FMT_NONE };
131 for (; *p != AV_PIX_FMT_NONE; p++) {
132 const char *name = av_get_pix_fmt_name(*p);
133 avio_printf(s, "%s|", name);
135 len = avio_close_dyn_buf(s, &ret);
142 /* Define a function for building a string containing a list of
143 * allowed formats. */
144 #define DEF_CHOOSE_FORMAT(type, var, supported_list, none, get_name) \
145 static char *choose_ ## var ## s(OutputStream *ost) \
147 if (ost->st->codec->var != none) { \
148 get_name(ost->st->codec->var); \
149 return av_strdup(name); \
150 } else if (ost->enc && ost->enc->supported_list) { \
152 AVIOContext *s = NULL; \
156 if (avio_open_dyn_buf(&s) < 0) \
159 for (p = ost->enc->supported_list; *p != none; p++) { \
161 avio_printf(s, "%s|", name); \
163 len = avio_close_dyn_buf(s, &ret); \
170 // DEF_CHOOSE_FORMAT(enum AVPixelFormat, pix_fmt, pix_fmts, AV_PIX_FMT_NONE,
173 DEF_CHOOSE_FORMAT(enum AVSampleFormat, sample_fmt, sample_fmts,
174 AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME)
176 DEF_CHOOSE_FORMAT(int, sample_rate, supported_samplerates, 0,
177 GET_SAMPLE_RATE_NAME)
179 DEF_CHOOSE_FORMAT(uint64_t, channel_layout, channel_layouts, 0,
182 FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost)
184 FilterGraph *fg = av_mallocz(sizeof(*fg));
188 fg->index = nb_filtergraphs;
190 GROW_ARRAY(fg->outputs, fg->nb_outputs);
191 if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
193 fg->outputs[0]->ost = ost;
194 fg->outputs[0]->graph = fg;
196 ost->filter = fg->outputs[0];
198 GROW_ARRAY(fg->inputs, fg->nb_inputs);
199 if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
201 fg->inputs[0]->ist = ist;
202 fg->inputs[0]->graph = fg;
204 GROW_ARRAY(ist->filters, ist->nb_filters);
205 ist->filters[ist->nb_filters - 1] = fg->inputs[0];
207 GROW_ARRAY(filtergraphs, nb_filtergraphs);
208 filtergraphs[nb_filtergraphs - 1] = fg;
213 static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
215 InputStream *ist = NULL;
216 enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
219 // TODO: support other filter types
220 if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
221 av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
230 int file_idx = strtol(in->name, &p, 0);
232 if (file_idx < 0 || file_idx >= nb_input_files) {
233 av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtergraph description %s.\n",
234 file_idx, fg->graph_desc);
237 s = input_files[file_idx]->ctx;
239 for (i = 0; i < s->nb_streams; i++) {
240 enum AVMediaType stream_type = s->streams[i]->codec->codec_type;
241 if (stream_type != type &&
242 !(stream_type == AVMEDIA_TYPE_SUBTITLE &&
243 type == AVMEDIA_TYPE_VIDEO /* sub2video hack */))
245 if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
251 av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
252 "matches no streams.\n", p, fg->graph_desc);
255 ist = input_streams[input_files[file_idx]->ist_index + st->index];
257 /* find the first unused stream of corresponding type */
258 for (i = 0; i < nb_input_streams; i++) {
259 ist = input_streams[i];
260 if (ist->st->codec->codec_type == type && ist->discard)
263 if (i == nb_input_streams) {
264 av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
265 "unlabeled input pad %d on filter %s\n", in->pad_idx,
266 in->filter_ctx->name);
273 ist->decoding_needed++;
274 ist->st->discard = AVDISCARD_NONE;
276 GROW_ARRAY(fg->inputs, fg->nb_inputs);
277 if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
279 fg->inputs[fg->nb_inputs - 1]->ist = ist;
280 fg->inputs[fg->nb_inputs - 1]->graph = fg;
282 GROW_ARRAY(ist->filters, ist->nb_filters);
283 ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
286 static int insert_trim(int64_t start_time, int64_t duration,
287 AVFilterContext **last_filter, int *pad_idx,
288 const char *filter_name)
290 AVFilterGraph *graph = (*last_filter)->graph;
291 AVFilterContext *ctx;
292 const AVFilter *trim;
293 enum AVMediaType type = avfilter_pad_get_type((*last_filter)->output_pads, *pad_idx);
294 const char *name = (type == AVMEDIA_TYPE_VIDEO) ? "trim" : "atrim";
297 if (duration == INT64_MAX && start_time == AV_NOPTS_VALUE)
300 trim = avfilter_get_by_name(name);
302 av_log(NULL, AV_LOG_ERROR, "%s filter not present, cannot limit "
303 "recording time.\n", name);
304 return AVERROR_FILTER_NOT_FOUND;
307 ctx = avfilter_graph_alloc_filter(graph, trim, filter_name);
309 return AVERROR(ENOMEM);
311 if (duration != INT64_MAX) {
312 ret = av_opt_set_int(ctx, "durationi", duration,
313 AV_OPT_SEARCH_CHILDREN);
315 if (ret >= 0 && start_time != AV_NOPTS_VALUE) {
316 ret = av_opt_set_int(ctx, "starti", start_time,
317 AV_OPT_SEARCH_CHILDREN);
320 av_log(ctx, AV_LOG_ERROR, "Error configuring the %s filter", name);
324 ret = avfilter_init_str(ctx, NULL);
328 ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
337 static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
340 OutputStream *ost = ofilter->ost;
341 OutputFile *of = output_files[ost->file_index];
342 AVCodecContext *codec = ost->st->codec;
343 AVFilterContext *last_filter = out->filter_ctx;
344 int pad_idx = out->pad_idx;
348 snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
349 ret = avfilter_graph_create_filter(&ofilter->filter,
350 avfilter_get_by_name("buffersink"),
351 name, NULL, NULL, fg->graph);
356 if (codec->width || codec->height) {
358 AVFilterContext *filter;
360 snprintf(args, sizeof(args), "%d:%d:0x%X",
363 (unsigned)ost->sws_flags);
364 snprintf(name, sizeof(name), "scaler for output stream %d:%d",
365 ost->file_index, ost->index);
366 if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
367 name, args, NULL, fg->graph)) < 0)
369 if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
372 last_filter = filter;
376 if ((pix_fmts = choose_pix_fmts(ost))) {
377 AVFilterContext *filter;
378 snprintf(name, sizeof(name), "pixel format for output stream %d:%d",
379 ost->file_index, ost->index);
380 ret = avfilter_graph_create_filter(&filter,
381 avfilter_get_by_name("format"),
382 "format", pix_fmts, NULL,
387 if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
390 last_filter = filter;
394 if (ost->frame_rate.num && 0) {
395 AVFilterContext *fps;
398 snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
399 ost->frame_rate.den);
400 snprintf(name, sizeof(name), "fps for output stream %d:%d",
401 ost->file_index, ost->index);
402 ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
403 name, args, NULL, fg->graph);
407 ret = avfilter_link(last_filter, pad_idx, fps, 0);
414 snprintf(name, sizeof(name), "trim for output stream %d:%d",
415 ost->file_index, ost->index);
416 ret = insert_trim(of->start_time, of->recording_time,
417 &last_filter, &pad_idx, name);
422 if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
428 static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
430 OutputStream *ost = ofilter->ost;
431 OutputFile *of = output_files[ost->file_index];
432 AVCodecContext *codec = ost->st->codec;
433 AVFilterContext *last_filter = out->filter_ctx;
434 int pad_idx = out->pad_idx;
435 char *sample_fmts, *sample_rates, *channel_layouts;
439 snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
440 ret = avfilter_graph_create_filter(&ofilter->filter,
441 avfilter_get_by_name("abuffersink"),
442 name, NULL, NULL, fg->graph);
445 if ((ret = av_opt_set_int(ofilter->filter, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
448 #define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do { \
449 AVFilterContext *filt_ctx; \
451 av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
452 "similarly to -af " filter_name "=%s.\n", arg); \
454 ret = avfilter_graph_create_filter(&filt_ctx, \
455 avfilter_get_by_name(filter_name), \
456 filter_name, arg, NULL, fg->graph); \
460 ret = avfilter_link(last_filter, pad_idx, filt_ctx, 0); \
464 last_filter = filt_ctx; \
467 if (ost->audio_channels_mapped) {
470 av_bprint_init(&pan_buf, 256, 8192);
471 av_bprintf(&pan_buf, "0x%"PRIx64,
472 av_get_default_channel_layout(ost->audio_channels_mapped));
473 for (i = 0; i < ost->audio_channels_mapped; i++)
474 if (ost->audio_channels_map[i] != -1)
475 av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
477 AUTO_INSERT_FILTER("-map_channel", "pan", pan_buf.str);
478 av_bprint_finalize(&pan_buf, NULL);
481 if (codec->channels && !codec->channel_layout)
482 codec->channel_layout = av_get_default_channel_layout(codec->channels);
484 sample_fmts = choose_sample_fmts(ost);
485 sample_rates = choose_sample_rates(ost);
486 channel_layouts = choose_channel_layouts(ost);
487 if (sample_fmts || sample_rates || channel_layouts) {
488 AVFilterContext *format;
493 av_strlcatf(args, sizeof(args), "sample_fmts=%s:",
496 av_strlcatf(args, sizeof(args), "sample_rates=%s:",
499 av_strlcatf(args, sizeof(args), "channel_layouts=%s:",
502 av_freep(&sample_fmts);
503 av_freep(&sample_rates);
504 av_freep(&channel_layouts);
506 snprintf(name, sizeof(name), "audio format for output stream %d:%d",
507 ost->file_index, ost->index);
508 ret = avfilter_graph_create_filter(&format,
509 avfilter_get_by_name("aformat"),
510 name, args, NULL, fg->graph);
514 ret = avfilter_link(last_filter, pad_idx, format, 0);
518 last_filter = format;
522 if (audio_volume != 256 && 0) {
525 snprintf(args, sizeof(args), "%f", audio_volume / 256.);
526 AUTO_INSERT_FILTER("-vol", "volume", args);
529 if (ost->apad && of->shortest) {
533 for (i=0; i<of->ctx->nb_streams; i++)
534 if (of->ctx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO)
537 if (i<of->ctx->nb_streams) {
538 snprintf(args, sizeof(args), "%s", ost->apad);
539 AUTO_INSERT_FILTER("-apad", "apad", args);
543 snprintf(name, sizeof(name), "trim for output stream %d:%d",
544 ost->file_index, ost->index);
545 ret = insert_trim(of->start_time, of->recording_time,
546 &last_filter, &pad_idx, name);
550 if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
556 #define DESCRIBE_FILTER_LINK(f, inout, in) \
558 AVFilterContext *ctx = inout->filter_ctx; \
559 AVFilterPad *pads = in ? ctx->input_pads : ctx->output_pads; \
560 int nb_pads = in ? ctx->nb_inputs : ctx->nb_outputs; \
563 if (avio_open_dyn_buf(&pb) < 0) \
566 avio_printf(pb, "%s", ctx->filter->name); \
568 avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));\
570 avio_close_dyn_buf(pb, &f->name); \
573 int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
575 av_freep(&ofilter->name);
576 DESCRIBE_FILTER_LINK(ofilter, out, 0);
578 switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
579 case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
580 case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
581 default: av_assert0(0);
585 static int sub2video_prepare(InputStream *ist)
587 AVFormatContext *avf = input_files[ist->file_index]->ctx;
590 /* Compute the size of the canvas for the subtitles stream.
591 If the subtitles codec has set a size, use it. Otherwise use the
592 maximum dimensions of the video streams in the same file. */
593 w = ist->st->codec->width;
594 h = ist->st->codec->height;
596 for (i = 0; i < avf->nb_streams; i++) {
597 if (avf->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
598 w = FFMAX(w, avf->streams[i]->codec->width);
599 h = FFMAX(h, avf->streams[i]->codec->height);
606 av_log(avf, AV_LOG_INFO, "sub2video: using %dx%d canvas\n", w, h);
608 ist->sub2video.w = ist->st->codec->width = ist->resample_width = w;
609 ist->sub2video.h = ist->st->codec->height = ist->resample_height = h;
611 /* rectangles are AV_PIX_FMT_PAL8, but we have no guarantee that the
612 palettes for all rectangles are identical or compatible */
613 ist->resample_pix_fmt = ist->st->codec->pix_fmt = AV_PIX_FMT_RGB32;
615 ist->sub2video.frame = av_frame_alloc();
616 if (!ist->sub2video.frame)
617 return AVERROR(ENOMEM);
621 static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
624 AVFilterContext *last_filter;
625 const AVFilter *buffer_filt = avfilter_get_by_name("buffer");
626 InputStream *ist = ifilter->ist;
627 InputFile *f = input_files[ist->file_index];
628 AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
630 AVRational fr = ist->framerate;
634 int ret, pad_idx = 0;
636 if (ist->st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
637 av_log(NULL, AV_LOG_ERROR, "Cannot connect video filter to audio input\n");
638 return AVERROR(EINVAL);
642 fr = av_guess_frame_rate(input_files[ist->file_index]->ctx, ist->st, NULL);
644 if (ist->st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
645 ret = sub2video_prepare(ist);
650 sar = ist->st->sample_aspect_ratio.num ?
651 ist->st->sample_aspect_ratio :
652 ist->st->codec->sample_aspect_ratio;
654 sar = (AVRational){0,1};
655 av_bprint_init(&args, 0, 1);
657 "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:"
658 "pixel_aspect=%d/%d:sws_param=flags=%d", ist->resample_width,
659 ist->resample_height,
660 ist->hwaccel_retrieve_data ? ist->hwaccel_retrieved_pix_fmt : ist->resample_pix_fmt,
661 tb.num, tb.den, sar.num, sar.den,
662 SWS_BILINEAR + ((ist->st->codec->flags&CODEC_FLAG_BITEXACT) ? SWS_BITEXACT:0));
663 if (fr.num && fr.den)
664 av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
665 snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
666 ist->file_index, ist->st->index);
668 if ((ret = avfilter_graph_create_filter(&ifilter->filter, buffer_filt, name,
669 args.str, NULL, fg->graph)) < 0)
671 last_filter = ifilter->filter;
673 if (ist->framerate.num) {
674 AVFilterContext *setpts;
676 snprintf(name, sizeof(name), "force CFR for input from stream %d:%d",
677 ist->file_index, ist->st->index);
678 if ((ret = avfilter_graph_create_filter(&setpts,
679 avfilter_get_by_name("setpts"),
684 if ((ret = avfilter_link(last_filter, 0, setpts, 0)) < 0)
687 last_filter = setpts;
690 if (do_deinterlace) {
691 AVFilterContext *yadif;
693 snprintf(name, sizeof(name), "deinterlace input from stream %d:%d",
694 ist->file_index, ist->st->index);
695 if ((ret = avfilter_graph_create_filter(&yadif,
696 avfilter_get_by_name("yadif"),
701 if ((ret = avfilter_link(last_filter, 0, yadif, 0)) < 0)
707 snprintf(name, sizeof(name), "trim for input stream %d:%d",
708 ist->file_index, ist->st->index);
709 ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
710 AV_NOPTS_VALUE : 0, f->recording_time, &last_filter, &pad_idx, name);
714 if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
719 static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
722 AVFilterContext *last_filter;
723 const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer");
724 InputStream *ist = ifilter->ist;
725 InputFile *f = input_files[ist->file_index];
728 int ret, pad_idx = 0;
730 if (ist->st->codec->codec_type != AVMEDIA_TYPE_AUDIO) {
731 av_log(NULL, AV_LOG_ERROR, "Cannot connect audio filter to non audio input\n");
732 return AVERROR(EINVAL);
735 av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
736 av_bprintf(&args, "time_base=%d/%d:sample_rate=%d:sample_fmt=%s",
737 1, ist->st->codec->sample_rate,
738 ist->st->codec->sample_rate,
739 av_get_sample_fmt_name(ist->st->codec->sample_fmt));
740 if (ist->st->codec->channel_layout)
741 av_bprintf(&args, ":channel_layout=0x%"PRIx64,
742 ist->st->codec->channel_layout);
744 av_bprintf(&args, ":channels=%d", ist->st->codec->channels);
745 snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
746 ist->file_index, ist->st->index);
748 if ((ret = avfilter_graph_create_filter(&ifilter->filter, abuffer_filt,
749 name, args.str, NULL,
752 last_filter = ifilter->filter;
754 #define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg) do { \
755 AVFilterContext *filt_ctx; \
757 av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
758 "similarly to -af " filter_name "=%s.\n", arg); \
760 snprintf(name, sizeof(name), "graph %d %s for input stream %d:%d", \
761 fg->index, filter_name, ist->file_index, ist->st->index); \
762 ret = avfilter_graph_create_filter(&filt_ctx, \
763 avfilter_get_by_name(filter_name), \
764 name, arg, NULL, fg->graph); \
768 ret = avfilter_link(last_filter, 0, filt_ctx, 0); \
772 last_filter = filt_ctx; \
775 if (audio_sync_method > 0) {
776 char args[256] = {0};
778 av_strlcatf(args, sizeof(args), "async=%d", audio_sync_method);
779 if (audio_drift_threshold != 0.1)
780 av_strlcatf(args, sizeof(args), ":min_hard_comp=%f", audio_drift_threshold);
781 if (!fg->reconfiguration)
782 av_strlcatf(args, sizeof(args), ":first_pts=0");
783 AUTO_INSERT_FILTER_INPUT("-async", "aresample", args);
786 // if (ost->audio_channels_mapped) {
789 // av_bprint_init(&pan_buf, 256, 8192);
790 // av_bprintf(&pan_buf, "0x%"PRIx64,
791 // av_get_default_channel_layout(ost->audio_channels_mapped));
792 // for (i = 0; i < ost->audio_channels_mapped; i++)
793 // if (ost->audio_channels_map[i] != -1)
794 // av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
795 // AUTO_INSERT_FILTER_INPUT("-map_channel", "pan", pan_buf.str);
796 // av_bprint_finalize(&pan_buf, NULL);
799 if (audio_volume != 256) {
802 av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume "
803 "audio filter instead.\n");
805 snprintf(args, sizeof(args), "%f", audio_volume / 256.);
806 AUTO_INSERT_FILTER_INPUT("-vol", "volume", args);
809 snprintf(name, sizeof(name), "trim for input stream %d:%d",
810 ist->file_index, ist->st->index);
811 ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
812 AV_NOPTS_VALUE : 0, f->recording_time, &last_filter, &pad_idx, name);
816 if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
822 static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
825 av_freep(&ifilter->name);
826 DESCRIBE_FILTER_LINK(ifilter, in, 1);
828 switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
829 case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
830 case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
831 default: av_assert0(0);
835 int configure_filtergraph(FilterGraph *fg)
837 AVFilterInOut *inputs, *outputs, *cur;
838 int ret, i, init = !fg->graph, simple = !fg->graph_desc;
839 const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
842 avfilter_graph_free(&fg->graph);
843 if (!(fg->graph = avfilter_graph_alloc()))
844 return AVERROR(ENOMEM);
847 OutputStream *ost = fg->outputs[0]->ost;
849 AVDictionaryEntry *e = NULL;
851 snprintf(args, sizeof(args), "flags=0x%X", (unsigned)ost->sws_flags);
852 fg->graph->scale_sws_opts = av_strdup(args);
855 while ((e = av_dict_get(ost->swr_opts, "", e,
856 AV_DICT_IGNORE_SUFFIX))) {
857 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
860 args[strlen(args)-1] = 0;
861 av_opt_set(fg->graph, "aresample_swr_opts", args, 0);
864 while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e,
865 AV_DICT_IGNORE_SUFFIX))) {
866 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
869 args[strlen(args) - 1] = '\0';
870 fg->graph->resample_lavr_opts = av_strdup(args);
872 e = av_dict_get(ost->opts, "threads", NULL, 0);
874 av_opt_set(fg->graph, "threads", e->value, 0);
877 if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
880 if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
881 av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' does not have "
882 "exactly one input and output.\n", graph_desc);
883 return AVERROR(EINVAL);
886 for (cur = inputs; !simple && init && cur; cur = cur->next)
887 init_input_filter(fg, cur);
889 for (cur = inputs, i = 0; cur; cur = cur->next, i++)
890 if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0)
892 avfilter_inout_free(&inputs);
894 if (!init || simple) {
895 /* we already know the mappings between lavfi outputs and output streams,
896 * so we can finish the setup */
897 for (cur = outputs, i = 0; cur; cur = cur->next, i++)
898 configure_output_filter(fg, fg->outputs[i], cur);
899 avfilter_inout_free(&outputs);
901 if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
904 /* wait until output mappings are processed */
905 for (cur = outputs; cur;) {
906 GROW_ARRAY(fg->outputs, fg->nb_outputs);
907 if (!(fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]))))
909 fg->outputs[fg->nb_outputs - 1]->graph = fg;
910 fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
912 fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
916 fg->reconfiguration = 1;
920 int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
923 for (i = 0; i < fg->nb_inputs; i++)
924 if (fg->inputs[i]->ist == ist)