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/display.h"
35 #include "libavutil/opt.h"
36 #include "libavutil/pixdesc.h"
37 #include "libavutil/pixfmt.h"
38 #include "libavutil/imgutils.h"
39 #include "libavutil/samplefmt.h"
41 enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodecContext *enc_ctx, AVCodec *codec, enum AVPixelFormat target)
43 if (codec && codec->pix_fmts) {
44 const enum AVPixelFormat *p = codec->pix_fmts;
45 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(target);
46 int has_alpha = desc ? desc->nb_components % 2 == 0 : 0;
47 enum AVPixelFormat best= AV_PIX_FMT_NONE;
48 static const enum AVPixelFormat mjpeg_formats[] =
49 { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_NONE };
50 static const enum AVPixelFormat ljpeg_formats[] =
51 { 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 };
54 if (enc_ctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
55 if (enc_ctx->codec_id == AV_CODEC_ID_MJPEG) {
57 } else if (enc_ctx->codec_id == AV_CODEC_ID_LJPEG) {
61 for (; *p != AV_PIX_FMT_NONE; p++) {
62 best= avcodec_find_best_pix_fmt_of_2(best, *p, target, has_alpha, NULL);
66 if (*p == AV_PIX_FMT_NONE) {
67 if (target != AV_PIX_FMT_NONE)
68 av_log(NULL, AV_LOG_WARNING,
69 "Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
70 av_get_pix_fmt_name(target),
72 av_get_pix_fmt_name(best));
79 void choose_sample_fmt(AVStream *st, AVCodec *codec)
81 if (codec && codec->sample_fmts) {
82 const enum AVSampleFormat *p = codec->sample_fmts;
83 for (; *p != -1; p++) {
84 if (*p == st->codec->sample_fmt)
88 if((codec->capabilities & CODEC_CAP_LOSSLESS) && av_get_sample_fmt_name(st->codec->sample_fmt) > av_get_sample_fmt_name(codec->sample_fmts[0]))
89 av_log(NULL, AV_LOG_ERROR, "Conversion will not be lossless.\n");
90 if(av_get_sample_fmt_name(st->codec->sample_fmt))
91 av_log(NULL, AV_LOG_WARNING,
92 "Incompatible sample format '%s' for codec '%s', auto-selecting format '%s'\n",
93 av_get_sample_fmt_name(st->codec->sample_fmt),
95 av_get_sample_fmt_name(codec->sample_fmts[0]));
96 st->codec->sample_fmt = codec->sample_fmts[0];
101 static char *choose_pix_fmts(OutputStream *ost)
103 AVDictionaryEntry *strict_dict = av_dict_get(ost->encoder_opts, "strict", NULL, 0);
105 // used by choose_pixel_fmt() and below
106 av_opt_set(ost->enc_ctx, "strict", strict_dict->value, 0);
108 if (ost->keep_pix_fmt) {
110 avfilter_graph_set_auto_convert(ost->filter->graph->graph,
111 AVFILTER_AUTO_CONVERT_NONE);
112 if (ost->enc_ctx->pix_fmt == AV_PIX_FMT_NONE)
114 return av_strdup(av_get_pix_fmt_name(ost->enc_ctx->pix_fmt));
116 if (ost->enc_ctx->pix_fmt != AV_PIX_FMT_NONE) {
117 return av_strdup(av_get_pix_fmt_name(choose_pixel_fmt(ost->st, ost->enc_ctx, ost->enc, ost->enc_ctx->pix_fmt)));
118 } else if (ost->enc && ost->enc->pix_fmts) {
119 const enum AVPixelFormat *p;
120 AVIOContext *s = NULL;
124 if (avio_open_dyn_buf(&s) < 0)
127 p = ost->enc->pix_fmts;
128 if (ost->enc_ctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
129 if (ost->enc_ctx->codec_id == AV_CODEC_ID_MJPEG) {
130 p = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_NONE };
131 } else if (ost->enc_ctx->codec_id == AV_CODEC_ID_LJPEG) {
132 p = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUV420P,
133 AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_BGRA, AV_PIX_FMT_NONE };
137 for (; *p != AV_PIX_FMT_NONE; p++) {
138 const char *name = av_get_pix_fmt_name(*p);
139 avio_printf(s, "%s|", name);
141 len = avio_close_dyn_buf(s, &ret);
148 /* Define a function for building a string containing a list of
149 * allowed formats. */
150 #define DEF_CHOOSE_FORMAT(type, var, supported_list, none, get_name) \
151 static char *choose_ ## var ## s(OutputStream *ost) \
153 if (ost->enc_ctx->var != none) { \
154 get_name(ost->enc_ctx->var); \
155 return av_strdup(name); \
156 } else if (ost->enc && ost->enc->supported_list) { \
158 AVIOContext *s = NULL; \
162 if (avio_open_dyn_buf(&s) < 0) \
165 for (p = ost->enc->supported_list; *p != none; p++) { \
167 avio_printf(s, "%s|", name); \
169 len = avio_close_dyn_buf(s, &ret); \
176 // DEF_CHOOSE_FORMAT(enum AVPixelFormat, pix_fmt, pix_fmts, AV_PIX_FMT_NONE,
179 DEF_CHOOSE_FORMAT(enum AVSampleFormat, sample_fmt, sample_fmts,
180 AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME)
182 DEF_CHOOSE_FORMAT(int, sample_rate, supported_samplerates, 0,
183 GET_SAMPLE_RATE_NAME)
185 DEF_CHOOSE_FORMAT(uint64_t, channel_layout, channel_layouts, 0,
188 FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost)
190 FilterGraph *fg = av_mallocz(sizeof(*fg));
194 fg->index = nb_filtergraphs;
196 GROW_ARRAY(fg->outputs, fg->nb_outputs);
197 if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
199 fg->outputs[0]->ost = ost;
200 fg->outputs[0]->graph = fg;
202 ost->filter = fg->outputs[0];
204 GROW_ARRAY(fg->inputs, fg->nb_inputs);
205 if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
207 fg->inputs[0]->ist = ist;
208 fg->inputs[0]->graph = fg;
210 GROW_ARRAY(ist->filters, ist->nb_filters);
211 ist->filters[ist->nb_filters - 1] = fg->inputs[0];
213 GROW_ARRAY(filtergraphs, nb_filtergraphs);
214 filtergraphs[nb_filtergraphs - 1] = fg;
219 static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
221 InputStream *ist = NULL;
222 enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
225 // TODO: support other filter types
226 if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
227 av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
236 int file_idx = strtol(in->name, &p, 0);
238 if (file_idx < 0 || file_idx >= nb_input_files) {
239 av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtergraph description %s.\n",
240 file_idx, fg->graph_desc);
243 s = input_files[file_idx]->ctx;
245 for (i = 0; i < s->nb_streams; i++) {
246 enum AVMediaType stream_type = s->streams[i]->codec->codec_type;
247 if (stream_type != type &&
248 !(stream_type == AVMEDIA_TYPE_SUBTITLE &&
249 type == AVMEDIA_TYPE_VIDEO /* sub2video hack */))
251 if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
257 av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
258 "matches no streams.\n", p, fg->graph_desc);
261 ist = input_streams[input_files[file_idx]->ist_index + st->index];
263 /* find the first unused stream of corresponding type */
264 for (i = 0; i < nb_input_streams; i++) {
265 ist = input_streams[i];
266 if (ist->dec_ctx->codec_type == type && ist->discard)
269 if (i == nb_input_streams) {
270 av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
271 "unlabeled input pad %d on filter %s\n", in->pad_idx,
272 in->filter_ctx->name);
279 ist->decoding_needed |= DECODING_FOR_FILTER;
280 ist->st->discard = AVDISCARD_NONE;
282 GROW_ARRAY(fg->inputs, fg->nb_inputs);
283 if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
285 fg->inputs[fg->nb_inputs - 1]->ist = ist;
286 fg->inputs[fg->nb_inputs - 1]->graph = fg;
288 GROW_ARRAY(ist->filters, ist->nb_filters);
289 ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
292 static int insert_trim(int64_t start_time, int64_t duration,
293 AVFilterContext **last_filter, int *pad_idx,
294 const char *filter_name)
296 AVFilterGraph *graph = (*last_filter)->graph;
297 AVFilterContext *ctx;
298 const AVFilter *trim;
299 enum AVMediaType type = avfilter_pad_get_type((*last_filter)->output_pads, *pad_idx);
300 const char *name = (type == AVMEDIA_TYPE_VIDEO) ? "trim" : "atrim";
303 if (duration == INT64_MAX && start_time == AV_NOPTS_VALUE)
306 trim = avfilter_get_by_name(name);
308 av_log(NULL, AV_LOG_ERROR, "%s filter not present, cannot limit "
309 "recording time.\n", name);
310 return AVERROR_FILTER_NOT_FOUND;
313 ctx = avfilter_graph_alloc_filter(graph, trim, filter_name);
315 return AVERROR(ENOMEM);
317 if (duration != INT64_MAX) {
318 ret = av_opt_set_int(ctx, "durationi", duration,
319 AV_OPT_SEARCH_CHILDREN);
321 if (ret >= 0 && start_time != AV_NOPTS_VALUE) {
322 ret = av_opt_set_int(ctx, "starti", start_time,
323 AV_OPT_SEARCH_CHILDREN);
326 av_log(ctx, AV_LOG_ERROR, "Error configuring the %s filter", name);
330 ret = avfilter_init_str(ctx, NULL);
334 ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
343 static int insert_filter(AVFilterContext **last_filter, int *pad_idx,
344 const char *filter_name, const char *args)
346 AVFilterGraph *graph = (*last_filter)->graph;
347 AVFilterContext *ctx;
350 ret = avfilter_graph_create_filter(&ctx,
351 avfilter_get_by_name(filter_name),
352 filter_name, args, NULL, graph);
356 ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
365 static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
368 OutputStream *ost = ofilter->ost;
369 OutputFile *of = output_files[ost->file_index];
370 AVCodecContext *codec = ost->enc_ctx;
371 AVFilterContext *last_filter = out->filter_ctx;
372 int pad_idx = out->pad_idx;
376 snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
377 ret = avfilter_graph_create_filter(&ofilter->filter,
378 avfilter_get_by_name("buffersink"),
379 name, NULL, NULL, fg->graph);
384 if (codec->width || codec->height) {
386 AVFilterContext *filter;
388 snprintf(args, sizeof(args), "%d:%d:0x%X",
391 (unsigned)ost->sws_flags);
392 snprintf(name, sizeof(name), "scaler for output stream %d:%d",
393 ost->file_index, ost->index);
394 if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
395 name, args, NULL, fg->graph)) < 0)
397 if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
400 last_filter = filter;
404 if ((pix_fmts = choose_pix_fmts(ost))) {
405 AVFilterContext *filter;
406 snprintf(name, sizeof(name), "pixel format for output stream %d:%d",
407 ost->file_index, ost->index);
408 ret = avfilter_graph_create_filter(&filter,
409 avfilter_get_by_name("format"),
410 "format", pix_fmts, NULL, fg->graph);
414 if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
417 last_filter = filter;
421 if (ost->frame_rate.num && 0) {
422 AVFilterContext *fps;
425 snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
426 ost->frame_rate.den);
427 snprintf(name, sizeof(name), "fps for output stream %d:%d",
428 ost->file_index, ost->index);
429 ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
430 name, args, NULL, fg->graph);
434 ret = avfilter_link(last_filter, pad_idx, fps, 0);
441 snprintf(name, sizeof(name), "trim for output stream %d:%d",
442 ost->file_index, ost->index);
443 ret = insert_trim(of->start_time, of->recording_time,
444 &last_filter, &pad_idx, name);
449 if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
455 static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
457 OutputStream *ost = ofilter->ost;
458 OutputFile *of = output_files[ost->file_index];
459 AVCodecContext *codec = ost->enc_ctx;
460 AVFilterContext *last_filter = out->filter_ctx;
461 int pad_idx = out->pad_idx;
462 char *sample_fmts, *sample_rates, *channel_layouts;
466 snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
467 ret = avfilter_graph_create_filter(&ofilter->filter,
468 avfilter_get_by_name("abuffersink"),
469 name, NULL, NULL, fg->graph);
472 if ((ret = av_opt_set_int(ofilter->filter, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
475 #define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do { \
476 AVFilterContext *filt_ctx; \
478 av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
479 "similarly to -af " filter_name "=%s.\n", arg); \
481 ret = avfilter_graph_create_filter(&filt_ctx, \
482 avfilter_get_by_name(filter_name), \
483 filter_name, arg, NULL, fg->graph); \
487 ret = avfilter_link(last_filter, pad_idx, filt_ctx, 0); \
491 last_filter = filt_ctx; \
494 if (ost->audio_channels_mapped) {
497 av_bprint_init(&pan_buf, 256, 8192);
498 av_bprintf(&pan_buf, "0x%"PRIx64,
499 av_get_default_channel_layout(ost->audio_channels_mapped));
500 for (i = 0; i < ost->audio_channels_mapped; i++)
501 if (ost->audio_channels_map[i] != -1)
502 av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
504 AUTO_INSERT_FILTER("-map_channel", "pan", pan_buf.str);
505 av_bprint_finalize(&pan_buf, NULL);
508 if (codec->channels && !codec->channel_layout)
509 codec->channel_layout = av_get_default_channel_layout(codec->channels);
511 sample_fmts = choose_sample_fmts(ost);
512 sample_rates = choose_sample_rates(ost);
513 channel_layouts = choose_channel_layouts(ost);
514 if (sample_fmts || sample_rates || channel_layouts) {
515 AVFilterContext *format;
520 av_strlcatf(args, sizeof(args), "sample_fmts=%s:",
523 av_strlcatf(args, sizeof(args), "sample_rates=%s:",
526 av_strlcatf(args, sizeof(args), "channel_layouts=%s:",
529 av_freep(&sample_fmts);
530 av_freep(&sample_rates);
531 av_freep(&channel_layouts);
533 snprintf(name, sizeof(name), "audio format for output stream %d:%d",
534 ost->file_index, ost->index);
535 ret = avfilter_graph_create_filter(&format,
536 avfilter_get_by_name("aformat"),
537 name, args, NULL, fg->graph);
541 ret = avfilter_link(last_filter, pad_idx, format, 0);
545 last_filter = format;
549 if (audio_volume != 256 && 0) {
552 snprintf(args, sizeof(args), "%f", audio_volume / 256.);
553 AUTO_INSERT_FILTER("-vol", "volume", args);
556 if (ost->apad && of->shortest) {
560 for (i=0; i<of->ctx->nb_streams; i++)
561 if (of->ctx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO)
564 if (i<of->ctx->nb_streams) {
565 snprintf(args, sizeof(args), "%s", ost->apad);
566 AUTO_INSERT_FILTER("-apad", "apad", args);
570 snprintf(name, sizeof(name), "trim for output stream %d:%d",
571 ost->file_index, ost->index);
572 ret = insert_trim(of->start_time, of->recording_time,
573 &last_filter, &pad_idx, name);
577 if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
583 #define DESCRIBE_FILTER_LINK(f, inout, in) \
585 AVFilterContext *ctx = inout->filter_ctx; \
586 AVFilterPad *pads = in ? ctx->input_pads : ctx->output_pads; \
587 int nb_pads = in ? ctx->nb_inputs : ctx->nb_outputs; \
590 if (avio_open_dyn_buf(&pb) < 0) \
593 avio_printf(pb, "%s", ctx->filter->name); \
595 avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));\
597 avio_close_dyn_buf(pb, &f->name); \
600 int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
602 av_freep(&ofilter->name);
603 DESCRIBE_FILTER_LINK(ofilter, out, 0);
605 switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
606 case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
607 case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
608 default: av_assert0(0);
612 static int sub2video_prepare(InputStream *ist)
614 AVFormatContext *avf = input_files[ist->file_index]->ctx;
617 /* Compute the size of the canvas for the subtitles stream.
618 If the subtitles codec has set a size, use it. Otherwise use the
619 maximum dimensions of the video streams in the same file. */
620 w = ist->dec_ctx->width;
621 h = ist->dec_ctx->height;
623 for (i = 0; i < avf->nb_streams; i++) {
624 if (avf->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
625 w = FFMAX(w, avf->streams[i]->codec->width);
626 h = FFMAX(h, avf->streams[i]->codec->height);
633 av_log(avf, AV_LOG_INFO, "sub2video: using %dx%d canvas\n", w, h);
635 ist->sub2video.w = ist->dec_ctx->width = ist->resample_width = w;
636 ist->sub2video.h = ist->dec_ctx->height = ist->resample_height = h;
638 /* rectangles are AV_PIX_FMT_PAL8, but we have no guarantee that the
639 palettes for all rectangles are identical or compatible */
640 ist->resample_pix_fmt = ist->dec_ctx->pix_fmt = AV_PIX_FMT_RGB32;
642 ist->sub2video.frame = av_frame_alloc();
643 if (!ist->sub2video.frame)
644 return AVERROR(ENOMEM);
645 ist->sub2video.last_pts = INT64_MIN;
649 static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
652 AVFilterContext *last_filter;
653 const AVFilter *buffer_filt = avfilter_get_by_name("buffer");
654 InputStream *ist = ifilter->ist;
655 InputFile *f = input_files[ist->file_index];
656 AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
658 AVRational fr = ist->framerate;
662 int ret, pad_idx = 0;
663 int64_t tsoffset = 0;
665 if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
666 av_log(NULL, AV_LOG_ERROR, "Cannot connect video filter to audio input\n");
667 return AVERROR(EINVAL);
671 fr = av_guess_frame_rate(input_files[ist->file_index]->ctx, ist->st, NULL);
673 if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
674 ret = sub2video_prepare(ist);
679 sar = ist->st->sample_aspect_ratio.num ?
680 ist->st->sample_aspect_ratio :
681 ist->dec_ctx->sample_aspect_ratio;
683 sar = (AVRational){0,1};
684 av_bprint_init(&args, 0, 1);
686 "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:"
687 "pixel_aspect=%d/%d:sws_param=flags=%d", ist->resample_width,
688 ist->resample_height,
689 ist->hwaccel_retrieve_data ? ist->hwaccel_retrieved_pix_fmt : ist->resample_pix_fmt,
690 tb.num, tb.den, sar.num, sar.den,
691 SWS_BILINEAR + ((ist->dec_ctx->flags&CODEC_FLAG_BITEXACT) ? SWS_BITEXACT:0));
692 if (fr.num && fr.den)
693 av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
694 snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
695 ist->file_index, ist->st->index);
697 if ((ret = avfilter_graph_create_filter(&ifilter->filter, buffer_filt, name,
698 args.str, NULL, fg->graph)) < 0)
700 last_filter = ifilter->filter;
702 if (ist->autorotate) {
703 double theta = get_rotation(ist->st);
705 if (fabs(theta - 90) < 1.0) {
706 ret = insert_filter(&last_filter, &pad_idx, "transpose", "clock");
707 } else if (fabs(theta - 180) < 1.0) {
708 ret = insert_filter(&last_filter, &pad_idx, "hflip", NULL);
711 ret = insert_filter(&last_filter, &pad_idx, "vflip", NULL);
712 } else if (fabs(theta - 270) < 1.0) {
713 ret = insert_filter(&last_filter, &pad_idx, "transpose", "cclock");
714 } else if (fabs(theta) > 1.0) {
716 snprintf(rotate_buf, sizeof(rotate_buf), "%f*PI/180", theta);
717 ret = insert_filter(&last_filter, &pad_idx, "rotate", rotate_buf);
723 if (ist->framerate.num) {
724 AVFilterContext *setpts;
726 snprintf(name, sizeof(name), "force CFR for input from stream %d:%d",
727 ist->file_index, ist->st->index);
728 if ((ret = avfilter_graph_create_filter(&setpts,
729 avfilter_get_by_name("setpts"),
734 if ((ret = avfilter_link(last_filter, 0, setpts, 0)) < 0)
737 last_filter = setpts;
740 if (do_deinterlace) {
741 AVFilterContext *yadif;
743 snprintf(name, sizeof(name), "deinterlace input from stream %d:%d",
744 ist->file_index, ist->st->index);
745 if ((ret = avfilter_graph_create_filter(&yadif,
746 avfilter_get_by_name("yadif"),
751 if ((ret = avfilter_link(last_filter, 0, yadif, 0)) < 0)
757 snprintf(name, sizeof(name), "trim for input stream %d:%d",
758 ist->file_index, ist->st->index);
760 tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
761 if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
762 tsoffset += f->ctx->start_time;
764 ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
765 AV_NOPTS_VALUE : tsoffset, f->recording_time,
766 &last_filter, &pad_idx, name);
770 if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
775 static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
778 AVFilterContext *last_filter;
779 const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer");
780 InputStream *ist = ifilter->ist;
781 InputFile *f = input_files[ist->file_index];
784 int ret, pad_idx = 0;
785 int64_t tsoffset = 0;
787 if (ist->dec_ctx->codec_type != AVMEDIA_TYPE_AUDIO) {
788 av_log(NULL, AV_LOG_ERROR, "Cannot connect audio filter to non audio input\n");
789 return AVERROR(EINVAL);
792 av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
793 av_bprintf(&args, "time_base=%d/%d:sample_rate=%d:sample_fmt=%s",
794 1, ist->dec_ctx->sample_rate,
795 ist->dec_ctx->sample_rate,
796 av_get_sample_fmt_name(ist->dec_ctx->sample_fmt));
797 if (ist->dec_ctx->channel_layout)
798 av_bprintf(&args, ":channel_layout=0x%"PRIx64,
799 ist->dec_ctx->channel_layout);
801 av_bprintf(&args, ":channels=%d", ist->dec_ctx->channels);
802 snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
803 ist->file_index, ist->st->index);
805 if ((ret = avfilter_graph_create_filter(&ifilter->filter, abuffer_filt,
806 name, args.str, NULL,
809 last_filter = ifilter->filter;
811 #define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg) do { \
812 AVFilterContext *filt_ctx; \
814 av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
815 "similarly to -af " filter_name "=%s.\n", arg); \
817 snprintf(name, sizeof(name), "graph %d %s for input stream %d:%d", \
818 fg->index, filter_name, ist->file_index, ist->st->index); \
819 ret = avfilter_graph_create_filter(&filt_ctx, \
820 avfilter_get_by_name(filter_name), \
821 name, arg, NULL, fg->graph); \
825 ret = avfilter_link(last_filter, 0, filt_ctx, 0); \
829 last_filter = filt_ctx; \
832 if (audio_sync_method > 0) {
833 char args[256] = {0};
835 av_strlcatf(args, sizeof(args), "async=%d", audio_sync_method);
836 if (audio_drift_threshold != 0.1)
837 av_strlcatf(args, sizeof(args), ":min_hard_comp=%f", audio_drift_threshold);
838 if (!fg->reconfiguration)
839 av_strlcatf(args, sizeof(args), ":first_pts=0");
840 AUTO_INSERT_FILTER_INPUT("-async", "aresample", args);
843 // if (ost->audio_channels_mapped) {
846 // av_bprint_init(&pan_buf, 256, 8192);
847 // av_bprintf(&pan_buf, "0x%"PRIx64,
848 // av_get_default_channel_layout(ost->audio_channels_mapped));
849 // for (i = 0; i < ost->audio_channels_mapped; i++)
850 // if (ost->audio_channels_map[i] != -1)
851 // av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
852 // AUTO_INSERT_FILTER_INPUT("-map_channel", "pan", pan_buf.str);
853 // av_bprint_finalize(&pan_buf, NULL);
856 if (audio_volume != 256) {
859 av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume "
860 "audio filter instead.\n");
862 snprintf(args, sizeof(args), "%f", audio_volume / 256.);
863 AUTO_INSERT_FILTER_INPUT("-vol", "volume", args);
866 snprintf(name, sizeof(name), "trim for input stream %d:%d",
867 ist->file_index, ist->st->index);
869 tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
870 if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
871 tsoffset += f->ctx->start_time;
873 ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
874 AV_NOPTS_VALUE : tsoffset, f->recording_time,
875 &last_filter, &pad_idx, name);
879 if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
885 static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
888 av_freep(&ifilter->name);
889 DESCRIBE_FILTER_LINK(ifilter, in, 1);
891 if (!ifilter->ist->dec) {
892 av_log(NULL, AV_LOG_ERROR,
893 "No decoder for stream #%d:%d, filtering impossible\n",
894 ifilter->ist->file_index, ifilter->ist->st->index);
895 return AVERROR_DECODER_NOT_FOUND;
897 switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
898 case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
899 case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
900 default: av_assert0(0);
904 int configure_filtergraph(FilterGraph *fg)
906 AVFilterInOut *inputs, *outputs, *cur;
907 int ret, i, init = !fg->graph, simple = !fg->graph_desc;
908 const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
911 avfilter_graph_free(&fg->graph);
912 if (!(fg->graph = avfilter_graph_alloc()))
913 return AVERROR(ENOMEM);
916 OutputStream *ost = fg->outputs[0]->ost;
918 AVDictionaryEntry *e = NULL;
920 snprintf(args, sizeof(args), "flags=0x%X", (unsigned)ost->sws_flags);
921 fg->graph->scale_sws_opts = av_strdup(args);
924 while ((e = av_dict_get(ost->swr_opts, "", e,
925 AV_DICT_IGNORE_SUFFIX))) {
926 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
929 args[strlen(args)-1] = 0;
930 av_opt_set(fg->graph, "aresample_swr_opts", args, 0);
933 while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e,
934 AV_DICT_IGNORE_SUFFIX))) {
935 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
938 args[strlen(args) - 1] = '\0';
939 fg->graph->resample_lavr_opts = av_strdup(args);
941 e = av_dict_get(ost->encoder_opts, "threads", NULL, 0);
943 av_opt_set(fg->graph, "threads", e->value, 0);
946 if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
949 if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
950 const char *num_inputs;
951 const char *num_outputs;
954 } else if (outputs->next) {
961 } else if (inputs->next) {
966 av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' was expected "
967 "to have exactly 1 input and 1 output."
968 " However, it had %s input(s) and %s output(s)."
969 " Please adjust, or use a complex filtergraph (-filter_complex) instead.\n",
970 graph_desc, num_inputs, num_outputs);
971 return AVERROR(EINVAL);
974 for (cur = inputs; !simple && init && cur; cur = cur->next)
975 init_input_filter(fg, cur);
977 for (cur = inputs, i = 0; cur; cur = cur->next, i++)
978 if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0) {
979 avfilter_inout_free(&inputs);
980 avfilter_inout_free(&outputs);
983 avfilter_inout_free(&inputs);
985 if (!init || simple) {
986 /* we already know the mappings between lavfi outputs and output streams,
987 * so we can finish the setup */
988 for (cur = outputs, i = 0; cur; cur = cur->next, i++)
989 configure_output_filter(fg, fg->outputs[i], cur);
990 avfilter_inout_free(&outputs);
992 if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
995 /* wait until output mappings are processed */
996 for (cur = outputs; cur;) {
997 GROW_ARRAY(fg->outputs, fg->nb_outputs);
998 if (!(fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]))))
1000 fg->outputs[fg->nb_outputs - 1]->graph = fg;
1001 fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
1003 fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
1007 fg->reconfiguration = 1;
1009 for (i = 0; i < fg->nb_outputs; i++) {
1010 OutputStream *ost = fg->outputs[i]->ost;
1012 ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1013 !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
1014 av_buffersink_set_frame_size(ost->filter->filter,
1015 ost->enc_ctx->frame_size);
1021 int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
1024 for (i = 0; i < fg->nb_inputs; i++)
1025 if (fg->inputs[i]->ist == ist)