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"
27 #include "libavfilter/buffersrc.h"
29 #include "libavresample/avresample.h"
31 #include "libavutil/avassert.h"
32 #include "libavutil/avstring.h"
33 #include "libavutil/bprint.h"
34 #include "libavutil/channel_layout.h"
35 #include "libavutil/display.h"
36 #include "libavutil/opt.h"
37 #include "libavutil/pixdesc.h"
38 #include "libavutil/pixfmt.h"
39 #include "libavutil/imgutils.h"
40 #include "libavutil/samplefmt.h"
42 // FIXME: YUV420P etc. are actually supported with full color range,
43 // yet the latter information isn't available here.
44 static const enum AVPixelFormat *get_compliance_normal_pix_fmts(enum AVCodecID codec_id, const enum AVPixelFormat default_formats[])
46 static const enum AVPixelFormat mjpeg_formats[] =
47 { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P,
50 if (codec_id == AV_CODEC_ID_MJPEG) {
53 return default_formats;
57 static enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodecContext *enc_ctx,
58 const AVCodec *codec, enum AVPixelFormat target)
60 if (codec && codec->pix_fmts) {
61 const enum AVPixelFormat *p = codec->pix_fmts;
62 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(target);
63 //FIXME: This should check for AV_PIX_FMT_FLAG_ALPHA after PAL8 pixel format without alpha is implemented
64 int has_alpha = desc ? desc->nb_components % 2 == 0 : 0;
65 enum AVPixelFormat best= AV_PIX_FMT_NONE;
67 if (enc_ctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
68 p = get_compliance_normal_pix_fmts(enc_ctx->codec_id, p);
70 for (; *p != AV_PIX_FMT_NONE; p++) {
71 best = av_find_best_pix_fmt_of_2(best, *p, target, has_alpha, NULL);
75 if (*p == AV_PIX_FMT_NONE) {
76 if (target != AV_PIX_FMT_NONE)
77 av_log(NULL, AV_LOG_WARNING,
78 "Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
79 av_get_pix_fmt_name(target),
81 av_get_pix_fmt_name(best));
88 static char *choose_pix_fmts(OutputFilter *ofilter)
90 OutputStream *ost = ofilter->ost;
91 AVDictionaryEntry *strict_dict = av_dict_get(ost->encoder_opts, "strict", NULL, 0);
93 // used by choose_pixel_fmt() and below
94 av_opt_set(ost->enc_ctx, "strict", strict_dict->value, 0);
96 if (ost->keep_pix_fmt) {
97 avfilter_graph_set_auto_convert(ofilter->graph->graph,
98 AVFILTER_AUTO_CONVERT_NONE);
99 if (ost->enc_ctx->pix_fmt == AV_PIX_FMT_NONE)
101 return av_strdup(av_get_pix_fmt_name(ost->enc_ctx->pix_fmt));
103 if (ost->enc_ctx->pix_fmt != AV_PIX_FMT_NONE) {
104 return av_strdup(av_get_pix_fmt_name(choose_pixel_fmt(ost->st, ost->enc_ctx, ost->enc, ost->enc_ctx->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->enc_ctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
116 p = get_compliance_normal_pix_fmts(ost->enc_ctx->codec_id, p);
119 for (; *p != AV_PIX_FMT_NONE; p++) {
120 const char *name = av_get_pix_fmt_name(*p);
121 avio_printf(s, "%s|", name);
123 len = avio_close_dyn_buf(s, &ret);
130 /* Define a function for building a string containing a list of
131 * allowed formats. */
132 #define DEF_CHOOSE_FORMAT(suffix, type, var, supported_list, none, get_name) \
133 static char *choose_ ## suffix (OutputFilter *ofilter) \
135 if (ofilter->var != none) { \
136 get_name(ofilter->var); \
137 return av_strdup(name); \
138 } else if (ofilter->supported_list) { \
140 AVIOContext *s = NULL; \
144 if (avio_open_dyn_buf(&s) < 0) \
147 for (p = ofilter->supported_list; *p != none; p++) { \
149 avio_printf(s, "%s|", name); \
151 len = avio_close_dyn_buf(s, &ret); \
158 //DEF_CHOOSE_FORMAT(pix_fmts, enum AVPixelFormat, format, formats, AV_PIX_FMT_NONE,
161 DEF_CHOOSE_FORMAT(sample_fmts, enum AVSampleFormat, format, formats,
162 AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME)
164 DEF_CHOOSE_FORMAT(sample_rates, int, sample_rate, sample_rates, 0,
165 GET_SAMPLE_RATE_NAME)
167 DEF_CHOOSE_FORMAT(channel_layouts, uint64_t, channel_layout, channel_layouts, 0,
170 int init_simple_filtergraph(InputStream *ist, OutputStream *ost)
172 FilterGraph *fg = av_mallocz(sizeof(*fg));
176 fg->index = nb_filtergraphs;
178 GROW_ARRAY(fg->outputs, fg->nb_outputs);
179 if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
181 fg->outputs[0]->ost = ost;
182 fg->outputs[0]->graph = fg;
183 fg->outputs[0]->format = -1;
185 ost->filter = fg->outputs[0];
187 GROW_ARRAY(fg->inputs, fg->nb_inputs);
188 if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
190 fg->inputs[0]->ist = ist;
191 fg->inputs[0]->graph = fg;
192 fg->inputs[0]->format = -1;
194 fg->inputs[0]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
195 if (!fg->inputs[0]->frame_queue)
198 GROW_ARRAY(ist->filters, ist->nb_filters);
199 ist->filters[ist->nb_filters - 1] = fg->inputs[0];
201 GROW_ARRAY(filtergraphs, nb_filtergraphs);
202 filtergraphs[nb_filtergraphs - 1] = fg;
207 static char *describe_filter_link(FilterGraph *fg, AVFilterInOut *inout, int in)
209 AVFilterContext *ctx = inout->filter_ctx;
210 AVFilterPad *pads = in ? ctx->input_pads : ctx->output_pads;
211 int nb_pads = in ? ctx->nb_inputs : ctx->nb_outputs;
215 if (avio_open_dyn_buf(&pb) < 0)
218 avio_printf(pb, "%s", ctx->filter->name);
220 avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));
222 avio_close_dyn_buf(pb, &res);
226 static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
228 InputStream *ist = NULL;
229 enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
232 // TODO: support other filter types
233 if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
234 av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
243 int file_idx = strtol(in->name, &p, 0);
245 if (file_idx < 0 || file_idx >= nb_input_files) {
246 av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtergraph description %s.\n",
247 file_idx, fg->graph_desc);
250 s = input_files[file_idx]->ctx;
252 for (i = 0; i < s->nb_streams; i++) {
253 enum AVMediaType stream_type = s->streams[i]->codecpar->codec_type;
254 if (stream_type != type &&
255 !(stream_type == AVMEDIA_TYPE_SUBTITLE &&
256 type == AVMEDIA_TYPE_VIDEO /* sub2video hack */))
258 if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
264 av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
265 "matches no streams.\n", p, fg->graph_desc);
268 ist = input_streams[input_files[file_idx]->ist_index + st->index];
269 if (ist->user_set_discard == AVDISCARD_ALL) {
270 av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
271 "matches a disabled input stream.\n", p, fg->graph_desc);
275 /* find the first unused stream of corresponding type */
276 for (i = 0; i < nb_input_streams; i++) {
277 ist = input_streams[i];
278 if (ist->user_set_discard == AVDISCARD_ALL)
280 if (ist->dec_ctx->codec_type == type && ist->discard)
283 if (i == nb_input_streams) {
284 av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
285 "unlabeled input pad %d on filter %s\n", in->pad_idx,
286 in->filter_ctx->name);
293 ist->decoding_needed |= DECODING_FOR_FILTER;
294 ist->st->discard = AVDISCARD_NONE;
296 GROW_ARRAY(fg->inputs, fg->nb_inputs);
297 if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
299 fg->inputs[fg->nb_inputs - 1]->ist = ist;
300 fg->inputs[fg->nb_inputs - 1]->graph = fg;
301 fg->inputs[fg->nb_inputs - 1]->format = -1;
302 fg->inputs[fg->nb_inputs - 1]->type = ist->st->codecpar->codec_type;
303 fg->inputs[fg->nb_inputs - 1]->name = describe_filter_link(fg, in, 1);
305 fg->inputs[fg->nb_inputs - 1]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
306 if (!fg->inputs[fg->nb_inputs - 1]->frame_queue)
309 GROW_ARRAY(ist->filters, ist->nb_filters);
310 ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
313 int init_complex_filtergraph(FilterGraph *fg)
315 AVFilterInOut *inputs, *outputs, *cur;
316 AVFilterGraph *graph;
319 /* this graph is only used for determining the kinds of inputs
320 * and outputs we have, and is discarded on exit from this function */
321 graph = avfilter_graph_alloc();
323 return AVERROR(ENOMEM);
324 graph->nb_threads = 1;
326 ret = avfilter_graph_parse2(graph, fg->graph_desc, &inputs, &outputs);
330 for (cur = inputs; cur; cur = cur->next)
331 init_input_filter(fg, cur);
333 for (cur = outputs; cur;) {
334 GROW_ARRAY(fg->outputs, fg->nb_outputs);
335 fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]));
336 if (!fg->outputs[fg->nb_outputs - 1])
339 fg->outputs[fg->nb_outputs - 1]->graph = fg;
340 fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
341 fg->outputs[fg->nb_outputs - 1]->type = avfilter_pad_get_type(cur->filter_ctx->output_pads,
343 fg->outputs[fg->nb_outputs - 1]->name = describe_filter_link(fg, cur, 0);
345 fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
349 avfilter_inout_free(&inputs);
350 avfilter_graph_free(&graph);
354 static int insert_trim(int64_t start_time, int64_t duration,
355 AVFilterContext **last_filter, int *pad_idx,
356 const char *filter_name)
358 AVFilterGraph *graph = (*last_filter)->graph;
359 AVFilterContext *ctx;
360 const AVFilter *trim;
361 enum AVMediaType type = avfilter_pad_get_type((*last_filter)->output_pads, *pad_idx);
362 const char *name = (type == AVMEDIA_TYPE_VIDEO) ? "trim" : "atrim";
365 if (duration == INT64_MAX && start_time == AV_NOPTS_VALUE)
368 trim = avfilter_get_by_name(name);
370 av_log(NULL, AV_LOG_ERROR, "%s filter not present, cannot limit "
371 "recording time.\n", name);
372 return AVERROR_FILTER_NOT_FOUND;
375 ctx = avfilter_graph_alloc_filter(graph, trim, filter_name);
377 return AVERROR(ENOMEM);
379 if (duration != INT64_MAX) {
380 ret = av_opt_set_int(ctx, "durationi", duration,
381 AV_OPT_SEARCH_CHILDREN);
383 if (ret >= 0 && start_time != AV_NOPTS_VALUE) {
384 ret = av_opt_set_int(ctx, "starti", start_time,
385 AV_OPT_SEARCH_CHILDREN);
388 av_log(ctx, AV_LOG_ERROR, "Error configuring the %s filter", name);
392 ret = avfilter_init_str(ctx, NULL);
396 ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
405 static int insert_filter(AVFilterContext **last_filter, int *pad_idx,
406 const char *filter_name, const char *args)
408 AVFilterGraph *graph = (*last_filter)->graph;
409 AVFilterContext *ctx;
412 ret = avfilter_graph_create_filter(&ctx,
413 avfilter_get_by_name(filter_name),
414 filter_name, args, NULL, graph);
418 ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
427 static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
430 OutputStream *ost = ofilter->ost;
431 OutputFile *of = output_files[ost->file_index];
432 AVFilterContext *last_filter = out->filter_ctx;
433 int pad_idx = out->pad_idx;
437 snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
438 ret = avfilter_graph_create_filter(&ofilter->filter,
439 avfilter_get_by_name("buffersink"),
440 name, NULL, NULL, fg->graph);
445 if ((ofilter->width || ofilter->height) && ofilter->ost->autoscale) {
447 AVFilterContext *filter;
448 AVDictionaryEntry *e = NULL;
450 snprintf(args, sizeof(args), "%d:%d",
451 ofilter->width, ofilter->height);
453 while ((e = av_dict_get(ost->sws_dict, "", e,
454 AV_DICT_IGNORE_SUFFIX))) {
455 av_strlcatf(args, sizeof(args), ":%s=%s", e->key, e->value);
458 snprintf(name, sizeof(name), "scaler_out_%d_%d",
459 ost->file_index, ost->index);
460 if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
461 name, args, NULL, fg->graph)) < 0)
463 if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
466 last_filter = filter;
470 if ((pix_fmts = choose_pix_fmts(ofilter))) {
471 AVFilterContext *filter;
472 snprintf(name, sizeof(name), "format_out_%d_%d",
473 ost->file_index, ost->index);
474 ret = avfilter_graph_create_filter(&filter,
475 avfilter_get_by_name("format"),
476 "format", pix_fmts, NULL, fg->graph);
480 if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
483 last_filter = filter;
487 if (ost->frame_rate.num && 0) {
488 AVFilterContext *fps;
491 snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
492 ost->frame_rate.den);
493 snprintf(name, sizeof(name), "fps_out_%d_%d",
494 ost->file_index, ost->index);
495 ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
496 name, args, NULL, fg->graph);
500 ret = avfilter_link(last_filter, pad_idx, fps, 0);
507 snprintf(name, sizeof(name), "trim_out_%d_%d",
508 ost->file_index, ost->index);
509 ret = insert_trim(of->start_time, of->recording_time,
510 &last_filter, &pad_idx, name);
515 if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
521 static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
523 OutputStream *ost = ofilter->ost;
524 OutputFile *of = output_files[ost->file_index];
525 AVCodecContext *codec = ost->enc_ctx;
526 AVFilterContext *last_filter = out->filter_ctx;
527 int pad_idx = out->pad_idx;
528 char *sample_fmts, *sample_rates, *channel_layouts;
532 snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
533 ret = avfilter_graph_create_filter(&ofilter->filter,
534 avfilter_get_by_name("abuffersink"),
535 name, NULL, NULL, fg->graph);
538 if ((ret = av_opt_set_int(ofilter->filter, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
541 #define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do { \
542 AVFilterContext *filt_ctx; \
544 av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
545 "similarly to -af " filter_name "=%s.\n", arg); \
547 ret = avfilter_graph_create_filter(&filt_ctx, \
548 avfilter_get_by_name(filter_name), \
549 filter_name, arg, NULL, fg->graph); \
553 ret = avfilter_link(last_filter, pad_idx, filt_ctx, 0); \
557 last_filter = filt_ctx; \
560 if (ost->audio_channels_mapped) {
563 av_bprint_init(&pan_buf, 256, 8192);
564 av_bprintf(&pan_buf, "0x%"PRIx64,
565 av_get_default_channel_layout(ost->audio_channels_mapped));
566 for (i = 0; i < ost->audio_channels_mapped; i++)
567 if (ost->audio_channels_map[i] != -1)
568 av_bprintf(&pan_buf, "|c%d=c%d", i, ost->audio_channels_map[i]);
570 AUTO_INSERT_FILTER("-map_channel", "pan", pan_buf.str);
571 av_bprint_finalize(&pan_buf, NULL);
574 if (codec->channels && !codec->channel_layout)
575 codec->channel_layout = av_get_default_channel_layout(codec->channels);
577 sample_fmts = choose_sample_fmts(ofilter);
578 sample_rates = choose_sample_rates(ofilter);
579 channel_layouts = choose_channel_layouts(ofilter);
580 if (sample_fmts || sample_rates || channel_layouts) {
581 AVFilterContext *format;
586 av_strlcatf(args, sizeof(args), "sample_fmts=%s:",
589 av_strlcatf(args, sizeof(args), "sample_rates=%s:",
592 av_strlcatf(args, sizeof(args), "channel_layouts=%s:",
595 av_freep(&sample_fmts);
596 av_freep(&sample_rates);
597 av_freep(&channel_layouts);
599 snprintf(name, sizeof(name), "format_out_%d_%d",
600 ost->file_index, ost->index);
601 ret = avfilter_graph_create_filter(&format,
602 avfilter_get_by_name("aformat"),
603 name, args, NULL, fg->graph);
607 ret = avfilter_link(last_filter, pad_idx, format, 0);
611 last_filter = format;
615 if (ost->apad && of->shortest) {
619 for (i=0; i<of->ctx->nb_streams; i++)
620 if (of->ctx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
623 if (i<of->ctx->nb_streams) {
624 snprintf(args, sizeof(args), "%s", ost->apad);
625 AUTO_INSERT_FILTER("-apad", "apad", args);
629 snprintf(name, sizeof(name), "trim for output stream %d:%d",
630 ost->file_index, ost->index);
631 ret = insert_trim(of->start_time, of->recording_time,
632 &last_filter, &pad_idx, name);
636 if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
642 static int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter,
646 av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", ofilter->name);
650 switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
651 case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
652 case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
653 default: av_assert0(0);
657 void check_filter_outputs(void)
660 for (i = 0; i < nb_filtergraphs; i++) {
662 for (n = 0; n < filtergraphs[i]->nb_outputs; n++) {
663 OutputFilter *output = filtergraphs[i]->outputs[n];
665 av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", output->name);
672 static int sub2video_prepare(InputStream *ist, InputFilter *ifilter)
674 AVFormatContext *avf = input_files[ist->file_index]->ctx;
677 /* Compute the size of the canvas for the subtitles stream.
678 If the subtitles codecpar has set a size, use it. Otherwise use the
679 maximum dimensions of the video streams in the same file. */
683 for (i = 0; i < avf->nb_streams; i++) {
684 if (avf->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
685 w = FFMAX(w, avf->streams[i]->codecpar->width);
686 h = FFMAX(h, avf->streams[i]->codecpar->height);
693 av_log(avf, AV_LOG_INFO, "sub2video: using %dx%d canvas\n", w, h);
695 ist->sub2video.w = ifilter->width = w;
696 ist->sub2video.h = ifilter->height = h;
698 ifilter->width = ist->dec_ctx->width ? ist->dec_ctx->width : ist->sub2video.w;
699 ifilter->height = ist->dec_ctx->height ? ist->dec_ctx->height : ist->sub2video.h;
701 /* rectangles are AV_PIX_FMT_PAL8, but we have no guarantee that the
702 palettes for all rectangles are identical or compatible */
703 ifilter->format = AV_PIX_FMT_RGB32;
705 ist->sub2video.frame = av_frame_alloc();
706 if (!ist->sub2video.frame)
707 return AVERROR(ENOMEM);
708 ist->sub2video.last_pts = INT64_MIN;
709 ist->sub2video.end_pts = INT64_MIN;
711 /* sub2video structure has been (re-)initialized.
712 Mark it as such so that the system will be
713 initialized with the first received heartbeat. */
714 ist->sub2video.initialize = 1;
719 static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
722 AVFilterContext *last_filter;
723 const AVFilter *buffer_filt = avfilter_get_by_name("buffer");
724 InputStream *ist = ifilter->ist;
725 InputFile *f = input_files[ist->file_index];
726 AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
728 AVRational fr = ist->framerate;
732 int ret, pad_idx = 0;
733 int64_t tsoffset = 0;
734 AVBufferSrcParameters *par = av_buffersrc_parameters_alloc();
737 return AVERROR(ENOMEM);
738 memset(par, 0, sizeof(*par));
739 par->format = AV_PIX_FMT_NONE;
741 if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
742 av_log(NULL, AV_LOG_ERROR, "Cannot connect video filter to audio input\n");
743 ret = AVERROR(EINVAL);
748 fr = av_guess_frame_rate(input_files[ist->file_index]->ctx, ist->st, NULL);
750 if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
751 ret = sub2video_prepare(ist, ifilter);
756 sar = ifilter->sample_aspect_ratio;
758 sar = (AVRational){0,1};
759 av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
761 "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:"
762 "pixel_aspect=%d/%d",
763 ifilter->width, ifilter->height, ifilter->format,
764 tb.num, tb.den, sar.num, sar.den);
765 if (fr.num && fr.den)
766 av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
767 snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
768 ist->file_index, ist->st->index);
771 if ((ret = avfilter_graph_create_filter(&ifilter->filter, buffer_filt, name,
772 args.str, NULL, fg->graph)) < 0)
774 par->hw_frames_ctx = ifilter->hw_frames_ctx;
775 ret = av_buffersrc_parameters_set(ifilter->filter, par);
779 last_filter = ifilter->filter;
781 if (ist->autorotate) {
782 double theta = get_rotation(ist->st);
784 if (fabs(theta - 90) < 1.0) {
785 ret = insert_filter(&last_filter, &pad_idx, "transpose", "clock");
786 } else if (fabs(theta - 180) < 1.0) {
787 ret = insert_filter(&last_filter, &pad_idx, "hflip", NULL);
790 ret = insert_filter(&last_filter, &pad_idx, "vflip", NULL);
791 } else if (fabs(theta - 270) < 1.0) {
792 ret = insert_filter(&last_filter, &pad_idx, "transpose", "cclock");
793 } else if (fabs(theta) > 1.0) {
795 snprintf(rotate_buf, sizeof(rotate_buf), "%f*PI/180", theta);
796 ret = insert_filter(&last_filter, &pad_idx, "rotate", rotate_buf);
802 if (do_deinterlace) {
803 AVFilterContext *yadif;
805 snprintf(name, sizeof(name), "deinterlace_in_%d_%d",
806 ist->file_index, ist->st->index);
807 if ((ret = avfilter_graph_create_filter(&yadif,
808 avfilter_get_by_name("yadif"),
813 if ((ret = avfilter_link(last_filter, 0, yadif, 0)) < 0)
819 snprintf(name, sizeof(name), "trim_in_%d_%d",
820 ist->file_index, ist->st->index);
822 tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
823 if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
824 tsoffset += f->ctx->start_time;
826 ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
827 AV_NOPTS_VALUE : tsoffset, f->recording_time,
828 &last_filter, &pad_idx, name);
832 if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
841 static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
844 AVFilterContext *last_filter;
845 const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer");
846 InputStream *ist = ifilter->ist;
847 InputFile *f = input_files[ist->file_index];
850 int ret, pad_idx = 0;
851 int64_t tsoffset = 0;
853 if (ist->dec_ctx->codec_type != AVMEDIA_TYPE_AUDIO) {
854 av_log(NULL, AV_LOG_ERROR, "Cannot connect audio filter to non audio input\n");
855 return AVERROR(EINVAL);
858 av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
859 av_bprintf(&args, "time_base=%d/%d:sample_rate=%d:sample_fmt=%s",
860 1, ifilter->sample_rate,
861 ifilter->sample_rate,
862 av_get_sample_fmt_name(ifilter->format));
863 if (ifilter->channel_layout)
864 av_bprintf(&args, ":channel_layout=0x%"PRIx64,
865 ifilter->channel_layout);
867 av_bprintf(&args, ":channels=%d", ifilter->channels);
868 snprintf(name, sizeof(name), "graph_%d_in_%d_%d", fg->index,
869 ist->file_index, ist->st->index);
871 if ((ret = avfilter_graph_create_filter(&ifilter->filter, abuffer_filt,
872 name, args.str, NULL,
875 last_filter = ifilter->filter;
877 #define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg) do { \
878 AVFilterContext *filt_ctx; \
880 av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
881 "similarly to -af " filter_name "=%s.\n", arg); \
883 snprintf(name, sizeof(name), "graph_%d_%s_in_%d_%d", \
884 fg->index, filter_name, ist->file_index, ist->st->index); \
885 ret = avfilter_graph_create_filter(&filt_ctx, \
886 avfilter_get_by_name(filter_name), \
887 name, arg, NULL, fg->graph); \
891 ret = avfilter_link(last_filter, 0, filt_ctx, 0); \
895 last_filter = filt_ctx; \
898 if (audio_sync_method > 0) {
899 char args[256] = {0};
901 av_strlcatf(args, sizeof(args), "async=%d", audio_sync_method);
902 if (audio_drift_threshold != 0.1)
903 av_strlcatf(args, sizeof(args), ":min_hard_comp=%f", audio_drift_threshold);
904 if (!fg->reconfiguration)
905 av_strlcatf(args, sizeof(args), ":first_pts=0");
906 AUTO_INSERT_FILTER_INPUT("-async", "aresample", args);
909 // if (ost->audio_channels_mapped) {
912 // av_bprint_init(&pan_buf, 256, 8192);
913 // av_bprintf(&pan_buf, "0x%"PRIx64,
914 // av_get_default_channel_layout(ost->audio_channels_mapped));
915 // for (i = 0; i < ost->audio_channels_mapped; i++)
916 // if (ost->audio_channels_map[i] != -1)
917 // av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
918 // AUTO_INSERT_FILTER_INPUT("-map_channel", "pan", pan_buf.str);
919 // av_bprint_finalize(&pan_buf, NULL);
922 if (audio_volume != 256) {
925 av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume "
926 "audio filter instead.\n");
928 snprintf(args, sizeof(args), "%f", audio_volume / 256.);
929 AUTO_INSERT_FILTER_INPUT("-vol", "volume", args);
932 snprintf(name, sizeof(name), "trim for input stream %d:%d",
933 ist->file_index, ist->st->index);
935 tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
936 if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
937 tsoffset += f->ctx->start_time;
939 ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
940 AV_NOPTS_VALUE : tsoffset, f->recording_time,
941 &last_filter, &pad_idx, name);
945 if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
951 static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
954 if (!ifilter->ist->dec) {
955 av_log(NULL, AV_LOG_ERROR,
956 "No decoder for stream #%d:%d, filtering impossible\n",
957 ifilter->ist->file_index, ifilter->ist->st->index);
958 return AVERROR_DECODER_NOT_FOUND;
960 switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
961 case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
962 case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
963 default: av_assert0(0);
967 static void cleanup_filtergraph(FilterGraph *fg)
970 for (i = 0; i < fg->nb_outputs; i++)
971 fg->outputs[i]->filter = (AVFilterContext *)NULL;
972 for (i = 0; i < fg->nb_inputs; i++)
973 fg->inputs[i]->filter = (AVFilterContext *)NULL;
974 avfilter_graph_free(&fg->graph);
977 int configure_filtergraph(FilterGraph *fg)
979 AVFilterInOut *inputs, *outputs, *cur;
980 int ret, i, simple = filtergraph_is_simple(fg);
981 const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
984 cleanup_filtergraph(fg);
985 if (!(fg->graph = avfilter_graph_alloc()))
986 return AVERROR(ENOMEM);
989 OutputStream *ost = fg->outputs[0]->ost;
991 AVDictionaryEntry *e = NULL;
993 fg->graph->nb_threads = filter_nbthreads;
996 while ((e = av_dict_get(ost->sws_dict, "", e,
997 AV_DICT_IGNORE_SUFFIX))) {
998 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1001 args[strlen(args)-1] = 0;
1002 fg->graph->scale_sws_opts = av_strdup(args);
1005 while ((e = av_dict_get(ost->swr_opts, "", e,
1006 AV_DICT_IGNORE_SUFFIX))) {
1007 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1010 args[strlen(args)-1] = 0;
1011 av_opt_set(fg->graph, "aresample_swr_opts", args, 0);
1014 while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e,
1015 AV_DICT_IGNORE_SUFFIX))) {
1016 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1019 args[strlen(args) - 1] = '\0';
1021 e = av_dict_get(ost->encoder_opts, "threads", NULL, 0);
1023 av_opt_set(fg->graph, "threads", e->value, 0);
1025 fg->graph->nb_threads = filter_complex_nbthreads;
1028 if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
1031 ret = hw_device_setup_for_filter(fg);
1035 if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
1036 const char *num_inputs;
1037 const char *num_outputs;
1040 } else if (outputs->next) {
1047 } else if (inputs->next) {
1052 av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' was expected "
1053 "to have exactly 1 input and 1 output."
1054 " However, it had %s input(s) and %s output(s)."
1055 " Please adjust, or use a complex filtergraph (-filter_complex) instead.\n",
1056 graph_desc, num_inputs, num_outputs);
1057 ret = AVERROR(EINVAL);
1061 for (cur = inputs, i = 0; cur; cur = cur->next, i++)
1062 if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0) {
1063 avfilter_inout_free(&inputs);
1064 avfilter_inout_free(&outputs);
1067 avfilter_inout_free(&inputs);
1069 for (cur = outputs, i = 0; cur; cur = cur->next, i++)
1070 configure_output_filter(fg, fg->outputs[i], cur);
1071 avfilter_inout_free(&outputs);
1073 if (!auto_conversion_filters)
1074 avfilter_graph_set_auto_convert(fg->graph, AVFILTER_AUTO_CONVERT_NONE);
1075 if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
1078 /* limit the lists of allowed formats to the ones selected, to
1079 * make sure they stay the same if the filtergraph is reconfigured later */
1080 for (i = 0; i < fg->nb_outputs; i++) {
1081 OutputFilter *ofilter = fg->outputs[i];
1082 AVFilterContext *sink = ofilter->filter;
1084 ofilter->format = av_buffersink_get_format(sink);
1086 ofilter->width = av_buffersink_get_w(sink);
1087 ofilter->height = av_buffersink_get_h(sink);
1089 ofilter->sample_rate = av_buffersink_get_sample_rate(sink);
1090 ofilter->channel_layout = av_buffersink_get_channel_layout(sink);
1093 fg->reconfiguration = 1;
1095 for (i = 0; i < fg->nb_outputs; i++) {
1096 OutputStream *ost = fg->outputs[i]->ost;
1098 /* identical to the same check in ffmpeg.c, needed because
1099 complex filter graphs are initialized earlier */
1100 av_log(NULL, AV_LOG_ERROR, "Encoder (codec %s) not found for output stream #%d:%d\n",
1101 avcodec_get_name(ost->st->codecpar->codec_id), ost->file_index, ost->index);
1102 ret = AVERROR(EINVAL);
1105 if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1106 !(ost->enc->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE))
1107 av_buffersink_set_frame_size(ost->filter->filter,
1108 ost->enc_ctx->frame_size);
1111 for (i = 0; i < fg->nb_inputs; i++) {
1112 while (av_fifo_size(fg->inputs[i]->frame_queue)) {
1114 av_fifo_generic_read(fg->inputs[i]->frame_queue, &tmp, sizeof(tmp), NULL);
1115 ret = av_buffersrc_add_frame(fg->inputs[i]->filter, tmp);
1116 av_frame_free(&tmp);
1122 /* send the EOFs for the finished inputs */
1123 for (i = 0; i < fg->nb_inputs; i++) {
1124 if (fg->inputs[i]->eof) {
1125 ret = av_buffersrc_add_frame(fg->inputs[i]->filter, NULL);
1131 /* process queued up subtitle packets */
1132 for (i = 0; i < fg->nb_inputs; i++) {
1133 InputStream *ist = fg->inputs[i]->ist;
1134 if (ist->sub2video.sub_queue && ist->sub2video.frame) {
1135 while (av_fifo_size(ist->sub2video.sub_queue)) {
1137 av_fifo_generic_read(ist->sub2video.sub_queue, &tmp, sizeof(tmp), NULL);
1138 sub2video_update(ist, INT64_MIN, &tmp);
1139 avsubtitle_free(&tmp);
1147 cleanup_filtergraph(fg);
1151 int ifilter_parameters_from_frame(InputFilter *ifilter, const AVFrame *frame)
1153 av_buffer_unref(&ifilter->hw_frames_ctx);
1155 ifilter->format = frame->format;
1157 ifilter->width = frame->width;
1158 ifilter->height = frame->height;
1159 ifilter->sample_aspect_ratio = frame->sample_aspect_ratio;
1161 ifilter->sample_rate = frame->sample_rate;
1162 ifilter->channels = frame->channels;
1163 ifilter->channel_layout = frame->channel_layout;
1165 if (frame->hw_frames_ctx) {
1166 ifilter->hw_frames_ctx = av_buffer_ref(frame->hw_frames_ctx);
1167 if (!ifilter->hw_frames_ctx)
1168 return AVERROR(ENOMEM);
1174 int filtergraph_is_simple(FilterGraph *fg)
1176 return !fg->graph_desc;