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
23 #include "libavfilter/avfilter.h"
24 #include "libavfilter/buffersink.h"
26 #include "libavresample/avresample.h"
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"
38 enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodec *codec, enum AVPixelFormat target)
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 };
53 for (; *p != AV_PIX_FMT_NONE; p++) {
54 best= avcodec_find_best_pix_fmt_of_2(best, *p, target, has_alpha, NULL);
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),
64 av_get_pix_fmt_name(best));
71 void choose_sample_fmt(AVStream *st, AVCodec *codec)
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)
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),
87 av_get_sample_fmt_name(codec->sample_fmts[0]));
88 st->codec->sample_fmt = codec->sample_fmts[0];
93 static char *choose_pix_fmts(OutputStream *ost)
95 if (ost->keep_pix_fmt) {
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)
101 return av_strdup(av_get_pix_fmt_name(ost->st->codec->pix_fmt));
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;
111 if (avio_open_dyn_buf(&s) < 0)
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 };
124 for (; *p != AV_PIX_FMT_NONE; p++) {
125 const char *name = av_get_pix_fmt_name(*p);
126 avio_printf(s, "%s|", name);
128 len = avio_close_dyn_buf(s, &ret);
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) \
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) { \
145 AVIOContext *s = NULL; \
149 if (avio_open_dyn_buf(&s) < 0) \
152 for (p = ost->enc->supported_list; *p != none; p++) { \
154 avio_printf(s, "%s|", name); \
156 len = avio_close_dyn_buf(s, &ret); \
163 // DEF_CHOOSE_FORMAT(enum AVPixelFormat, pix_fmt, pix_fmts, AV_PIX_FMT_NONE,
166 DEF_CHOOSE_FORMAT(enum AVSampleFormat, sample_fmt, sample_fmts,
167 AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME)
169 DEF_CHOOSE_FORMAT(int, sample_rate, supported_samplerates, 0,
170 GET_SAMPLE_RATE_NAME)
172 DEF_CHOOSE_FORMAT(uint64_t, channel_layout, channel_layouts, 0,
175 FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost)
177 FilterGraph *fg = av_mallocz(sizeof(*fg));
181 fg->index = nb_filtergraphs;
183 GROW_ARRAY(fg->outputs, fg->nb_outputs);
184 if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
186 fg->outputs[0]->ost = ost;
187 fg->outputs[0]->graph = fg;
189 ost->filter = fg->outputs[0];
191 GROW_ARRAY(fg->inputs, fg->nb_inputs);
192 if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
194 fg->inputs[0]->ist = ist;
195 fg->inputs[0]->graph = fg;
197 GROW_ARRAY(ist->filters, ist->nb_filters);
198 ist->filters[ist->nb_filters - 1] = fg->inputs[0];
200 GROW_ARRAY(filtergraphs, nb_filtergraphs);
201 filtergraphs[nb_filtergraphs - 1] = fg;
206 static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
208 InputStream *ist = NULL;
209 enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
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 "
223 int file_idx = strtol(in->name, &p, 0);
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);
230 s = input_files[file_idx]->ctx;
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 */))
238 if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
244 av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
245 "matches no streams.\n", p, fg->graph_desc);
248 ist = input_streams[input_files[file_idx]->ist_index + st->index];
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)
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);
266 ist->decoding_needed++;
267 ist->st->discard = AVDISCARD_NONE;
269 GROW_ARRAY(fg->inputs, fg->nb_inputs);
270 if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
272 fg->inputs[fg->nb_inputs - 1]->ist = ist;
273 fg->inputs[fg->nb_inputs - 1]->graph = fg;
275 GROW_ARRAY(ist->filters, ist->nb_filters);
276 ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
279 static int insert_trim(OutputStream *ost, AVFilterContext **last_filter, int *pad_idx)
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];
289 if (of->recording_time == INT64_MAX && !of->start_time)
292 // Use with duration and without output starttime is buggy with trim filters
296 trim = avfilter_get_by_name(name);
298 av_log(NULL, AV_LOG_ERROR, "%s filter not present, cannot limit "
299 "recording time.\n", name);
300 return AVERROR_FILTER_NOT_FOUND;
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);
307 return AVERROR(ENOMEM);
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);
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);
318 av_log(ctx, AV_LOG_ERROR, "Error configuring the %s filter", name);
322 ret = avfilter_init_str(ctx, NULL);
326 ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
335 static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
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;
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);
353 if (codec->width || codec->height) {
355 AVFilterContext *filter;
357 snprintf(args, sizeof(args), "%d:%d:flags=0x%X",
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)
366 if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
369 last_filter = filter;
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,
384 if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
387 last_filter = filter;
391 if (ost->frame_rate.num && 0) {
392 AVFilterContext *fps;
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);
404 ret = avfilter_link(last_filter, pad_idx, fps, 0);
411 ret = insert_trim(ost, &last_filter, &pad_idx);
416 if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
422 static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
424 OutputStream *ost = ofilter->ost;
425 AVCodecContext *codec = ost->st->codec;
426 AVFilterContext *last_filter = out->filter_ctx;
427 int pad_idx = out->pad_idx;
428 char *sample_fmts, *sample_rates, *channel_layouts;
432 snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
433 ret = avfilter_graph_create_filter(&ofilter->filter,
434 avfilter_get_by_name("abuffersink"),
435 name, NULL, NULL, fg->graph);
438 if ((ret = av_opt_set_int(ofilter->filter, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
441 #define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do { \
442 AVFilterContext *filt_ctx; \
444 av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
445 "similarly to -af " filter_name "=%s.\n", arg); \
447 ret = avfilter_graph_create_filter(&filt_ctx, \
448 avfilter_get_by_name(filter_name), \
449 filter_name, arg, NULL, fg->graph); \
453 ret = avfilter_link(last_filter, pad_idx, filt_ctx, 0); \
457 last_filter = filt_ctx; \
460 if (ost->audio_channels_mapped) {
463 av_bprint_init(&pan_buf, 256, 8192);
464 av_bprintf(&pan_buf, "0x%"PRIx64,
465 av_get_default_channel_layout(ost->audio_channels_mapped));
466 for (i = 0; i < ost->audio_channels_mapped; i++)
467 if (ost->audio_channels_map[i] != -1)
468 av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
470 AUTO_INSERT_FILTER("-map_channel", "pan", pan_buf.str);
471 av_bprint_finalize(&pan_buf, NULL);
474 if (codec->channels && !codec->channel_layout)
475 codec->channel_layout = av_get_default_channel_layout(codec->channels);
477 sample_fmts = choose_sample_fmts(ost);
478 sample_rates = choose_sample_rates(ost);
479 channel_layouts = choose_channel_layouts(ost);
480 if (sample_fmts || sample_rates || channel_layouts) {
481 AVFilterContext *format;
486 av_strlcatf(args, sizeof(args), "sample_fmts=%s:",
489 av_strlcatf(args, sizeof(args), "sample_rates=%s:",
492 av_strlcatf(args, sizeof(args), "channel_layouts=%s:",
495 av_freep(&sample_fmts);
496 av_freep(&sample_rates);
497 av_freep(&channel_layouts);
499 snprintf(name, sizeof(name), "audio format for output stream %d:%d",
500 ost->file_index, ost->index);
501 ret = avfilter_graph_create_filter(&format,
502 avfilter_get_by_name("aformat"),
503 name, args, NULL, fg->graph);
507 ret = avfilter_link(last_filter, pad_idx, format, 0);
511 last_filter = format;
515 if (audio_volume != 256 && 0) {
518 snprintf(args, sizeof(args), "%f", audio_volume / 256.);
519 AUTO_INSERT_FILTER("-vol", "volume", args);
522 ret = insert_trim(ost, &last_filter, &pad_idx);
526 if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
532 #define DESCRIBE_FILTER_LINK(f, inout, in) \
534 AVFilterContext *ctx = inout->filter_ctx; \
535 AVFilterPad *pads = in ? ctx->input_pads : ctx->output_pads; \
536 int nb_pads = in ? ctx->input_count : ctx->output_count; \
539 if (avio_open_dyn_buf(&pb) < 0) \
542 avio_printf(pb, "%s", ctx->filter->name); \
544 avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));\
546 avio_close_dyn_buf(pb, &f->name); \
549 int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
551 av_freep(&ofilter->name);
552 DESCRIBE_FILTER_LINK(ofilter, out, 0);
554 switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
555 case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
556 case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
557 default: av_assert0(0);
561 static int sub2video_prepare(InputStream *ist)
563 AVFormatContext *avf = input_files[ist->file_index]->ctx;
566 /* Compute the size of the canvas for the subtitles stream.
567 If the subtitles codec has set a size, use it. Otherwise use the
568 maximum dimensions of the video streams in the same file. */
569 w = ist->st->codec->width;
570 h = ist->st->codec->height;
572 for (i = 0; i < avf->nb_streams; i++) {
573 if (avf->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
574 w = FFMAX(w, avf->streams[i]->codec->width);
575 h = FFMAX(h, avf->streams[i]->codec->height);
582 av_log(avf, AV_LOG_INFO, "sub2video: using %dx%d canvas\n", w, h);
584 ist->sub2video.w = ist->st->codec->width = ist->resample_width = w;
585 ist->sub2video.h = ist->st->codec->height = ist->resample_height = h;
587 /* rectangles are AV_PIX_FMT_PAL8, but we have no guarantee that the
588 palettes for all rectangles are identical or compatible */
589 ist->resample_pix_fmt = ist->st->codec->pix_fmt = AV_PIX_FMT_RGB32;
591 ist->sub2video.frame = av_frame_alloc();
592 if (!ist->sub2video.frame)
593 return AVERROR(ENOMEM);
597 static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
600 AVFilterContext *first_filter = in->filter_ctx;
601 AVFilter *filter = avfilter_get_by_name("buffer");
602 InputStream *ist = ifilter->ist;
603 AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
605 AVRational fr = ist->framerate;
609 int pad_idx = in->pad_idx;
613 fr = av_guess_frame_rate(input_files[ist->file_index]->ctx, ist->st, NULL);
615 if (ist->st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
616 ret = sub2video_prepare(ist);
621 sar = ist->st->sample_aspect_ratio.num ?
622 ist->st->sample_aspect_ratio :
623 ist->st->codec->sample_aspect_ratio;
625 sar = (AVRational){0,1};
626 av_bprint_init(&args, 0, 1);
628 "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:"
629 "pixel_aspect=%d/%d:sws_param=flags=%d", ist->resample_width,
630 ist->resample_height, ist->resample_pix_fmt,
631 tb.num, tb.den, sar.num, sar.den,
632 SWS_BILINEAR + ((ist->st->codec->flags&CODEC_FLAG_BITEXACT) ? SWS_BITEXACT:0));
633 if (fr.num && fr.den)
634 av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
635 snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
636 ist->file_index, ist->st->index);
638 if ((ret = avfilter_graph_create_filter(&ifilter->filter, filter, name,
639 args.str, NULL, fg->graph)) < 0)
642 if (ist->framerate.num) {
643 AVFilterContext *setpts;
645 snprintf(name, sizeof(name), "force CFR for input from stream %d:%d",
646 ist->file_index, ist->st->index);
647 if ((ret = avfilter_graph_create_filter(&setpts,
648 avfilter_get_by_name("setpts"),
653 if ((ret = avfilter_link(setpts, 0, first_filter, pad_idx)) < 0)
656 first_filter = setpts;
660 if (do_deinterlace) {
661 AVFilterContext *yadif;
663 snprintf(name, sizeof(name), "deinterlace input from stream %d:%d",
664 ist->file_index, ist->st->index);
665 if ((ret = avfilter_graph_create_filter(&yadif,
666 avfilter_get_by_name("yadif"),
671 if ((ret = avfilter_link(yadif, 0, first_filter, pad_idx)) < 0)
674 first_filter = yadif;
678 if ((ret = avfilter_link(ifilter->filter, 0, first_filter, pad_idx)) < 0)
683 static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
686 AVFilterContext *first_filter = in->filter_ctx;
687 AVFilter *filter = avfilter_get_by_name("abuffer");
688 InputStream *ist = ifilter->ist;
689 int pad_idx = in->pad_idx;
694 av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
695 av_bprintf(&args, "time_base=%d/%d:sample_rate=%d:sample_fmt=%s",
696 1, ist->st->codec->sample_rate,
697 ist->st->codec->sample_rate,
698 av_get_sample_fmt_name(ist->st->codec->sample_fmt));
699 if (ist->st->codec->channel_layout)
700 av_bprintf(&args, ":channel_layout=0x%"PRIx64,
701 ist->st->codec->channel_layout);
703 av_bprintf(&args, ":channels=%d", ist->st->codec->channels);
704 snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
705 ist->file_index, ist->st->index);
707 if ((ret = avfilter_graph_create_filter(&ifilter->filter, filter,
708 name, args.str, NULL,
712 #define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg) do { \
713 AVFilterContext *filt_ctx; \
715 av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
716 "similarly to -af " filter_name "=%s.\n", arg); \
718 snprintf(name, sizeof(name), "graph %d %s for input stream %d:%d", \
719 fg->index, filter_name, ist->file_index, ist->st->index); \
720 ret = avfilter_graph_create_filter(&filt_ctx, \
721 avfilter_get_by_name(filter_name), \
722 name, arg, NULL, fg->graph); \
726 ret = avfilter_link(filt_ctx, 0, first_filter, pad_idx); \
730 first_filter = filt_ctx; \
733 if (audio_sync_method > 0) {
734 char args[256] = {0};
736 av_strlcatf(args, sizeof(args), "async=%d", audio_sync_method);
737 if (audio_drift_threshold != 0.1)
738 av_strlcatf(args, sizeof(args), ":min_hard_comp=%f", audio_drift_threshold);
739 if (!fg->reconfiguration)
740 av_strlcatf(args, sizeof(args), ":first_pts=0");
741 AUTO_INSERT_FILTER_INPUT("-async", "aresample", args);
744 // if (ost->audio_channels_mapped) {
747 // av_bprint_init(&pan_buf, 256, 8192);
748 // av_bprintf(&pan_buf, "0x%"PRIx64,
749 // av_get_default_channel_layout(ost->audio_channels_mapped));
750 // for (i = 0; i < ost->audio_channels_mapped; i++)
751 // if (ost->audio_channels_map[i] != -1)
752 // av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
753 // AUTO_INSERT_FILTER_INPUT("-map_channel", "pan", pan_buf.str);
754 // av_bprint_finalize(&pan_buf, NULL);
757 if (audio_volume != 256) {
760 av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume "
761 "audio filter instead.\n");
763 snprintf(args, sizeof(args), "%f", audio_volume / 256.);
764 AUTO_INSERT_FILTER_INPUT("-vol", "volume", args);
766 if ((ret = avfilter_link(ifilter->filter, 0, first_filter, pad_idx)) < 0)
772 static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
775 av_freep(&ifilter->name);
776 DESCRIBE_FILTER_LINK(ifilter, in, 1);
778 switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
779 case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
780 case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
781 default: av_assert0(0);
785 int configure_filtergraph(FilterGraph *fg)
787 AVFilterInOut *inputs, *outputs, *cur;
788 int ret, i, init = !fg->graph, simple = !fg->graph_desc;
789 const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
792 avfilter_graph_free(&fg->graph);
793 if (!(fg->graph = avfilter_graph_alloc()))
794 return AVERROR(ENOMEM);
797 OutputStream *ost = fg->outputs[0]->ost;
799 AVDictionaryEntry *e = NULL;
801 snprintf(args, sizeof(args), "flags=0x%X", (unsigned)ost->sws_flags);
802 fg->graph->scale_sws_opts = av_strdup(args);
805 while ((e = av_dict_get(ost->swr_opts, "", e,
806 AV_DICT_IGNORE_SUFFIX))) {
807 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
810 args[strlen(args)-1] = 0;
811 av_opt_set(fg->graph, "aresample_swr_opts", args, 0);
814 while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e,
815 AV_DICT_IGNORE_SUFFIX))) {
816 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
819 args[strlen(args) - 1] = '\0';
820 fg->graph->resample_lavr_opts = av_strdup(args);
823 if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
826 if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
827 av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' does not have "
828 "exactly one input and output.\n", graph_desc);
829 return AVERROR(EINVAL);
832 for (cur = inputs; !simple && init && cur; cur = cur->next)
833 init_input_filter(fg, cur);
835 for (cur = inputs, i = 0; cur; cur = cur->next, i++)
836 if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0)
838 avfilter_inout_free(&inputs);
840 if (!init || simple) {
841 /* we already know the mappings between lavfi outputs and output streams,
842 * so we can finish the setup */
843 for (cur = outputs, i = 0; cur; cur = cur->next, i++)
844 configure_output_filter(fg, fg->outputs[i], cur);
845 avfilter_inout_free(&outputs);
847 if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
850 /* wait until output mappings are processed */
851 for (cur = outputs; cur;) {
852 GROW_ARRAY(fg->outputs, fg->nb_outputs);
853 if (!(fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]))))
855 fg->outputs[fg->nb_outputs - 1]->graph = fg;
856 fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
858 fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
862 fg->reconfiguration = 1;
866 int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
869 for (i = 0; i < fg->nb_inputs; i++)
870 if (fg->inputs[i]->ist == ist)