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 "libavutil/avassert.h"
30 #include "libavutil/avstring.h"
31 #include "libavutil/bprint.h"
32 #include "libavutil/channel_layout.h"
33 #include "libavutil/display.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 // FIXME: YUV420P etc. are actually supported with full color range,
41 // yet the latter information isn't available here.
42 static const enum AVPixelFormat *get_compliance_normal_pix_fmts(const AVCodec *codec, const enum AVPixelFormat default_formats[])
44 static const enum AVPixelFormat mjpeg_formats[] =
45 { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P,
48 if (!strcmp(codec->name, "mjpeg")) {
51 return default_formats;
55 static enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodecContext *enc_ctx,
56 const AVCodec *codec, enum AVPixelFormat target)
58 if (codec && codec->pix_fmts) {
59 const enum AVPixelFormat *p = codec->pix_fmts;
60 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(target);
61 //FIXME: This should check for AV_PIX_FMT_FLAG_ALPHA after PAL8 pixel format without alpha is implemented
62 int has_alpha = desc ? desc->nb_components % 2 == 0 : 0;
63 enum AVPixelFormat best= AV_PIX_FMT_NONE;
65 if (enc_ctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
66 p = get_compliance_normal_pix_fmts(codec, p);
68 for (; *p != AV_PIX_FMT_NONE; p++) {
69 best = av_find_best_pix_fmt_of_2(best, *p, target, has_alpha, NULL);
73 if (*p == AV_PIX_FMT_NONE) {
74 if (target != AV_PIX_FMT_NONE)
75 av_log(NULL, AV_LOG_WARNING,
76 "Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
77 av_get_pix_fmt_name(target),
79 av_get_pix_fmt_name(best));
86 static char *choose_pix_fmts(OutputFilter *ofilter)
88 OutputStream *ost = ofilter->ost;
89 AVDictionaryEntry *strict_dict = av_dict_get(ost->encoder_opts, "strict", NULL, 0);
91 // used by choose_pixel_fmt() and below
92 av_opt_set(ost->enc_ctx, "strict", strict_dict->value, 0);
94 if (ost->keep_pix_fmt) {
95 avfilter_graph_set_auto_convert(ofilter->graph->graph,
96 AVFILTER_AUTO_CONVERT_NONE);
97 if (ost->enc_ctx->pix_fmt == AV_PIX_FMT_NONE)
99 return av_strdup(av_get_pix_fmt_name(ost->enc_ctx->pix_fmt));
101 if (ost->enc_ctx->pix_fmt != AV_PIX_FMT_NONE) {
102 return av_strdup(av_get_pix_fmt_name(choose_pixel_fmt(ost->st, ost->enc_ctx, ost->enc, ost->enc_ctx->pix_fmt)));
103 } else if (ost->enc && ost->enc->pix_fmts) {
104 const enum AVPixelFormat *p;
105 AVIOContext *s = NULL;
109 if (avio_open_dyn_buf(&s) < 0)
112 p = ost->enc->pix_fmts;
113 if (ost->enc_ctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
114 p = get_compliance_normal_pix_fmts(ost->enc, p);
117 for (; *p != AV_PIX_FMT_NONE; p++) {
118 const char *name = av_get_pix_fmt_name(*p);
119 avio_printf(s, "%s|", name);
121 len = avio_close_dyn_buf(s, &ret);
128 /* Define a function for appending a list of allowed formats
129 * to an AVBPrint. If nonempty, the list will have a header. */
130 #define DEF_CHOOSE_FORMAT(name, type, var, supported_list, none, printf_format, get_name) \
131 static void choose_ ## name (OutputFilter *ofilter, AVBPrint *bprint) \
133 if (ofilter->var == none && !ofilter->supported_list) \
135 av_bprintf(bprint, #name "="); \
136 if (ofilter->var != none) { \
137 av_bprintf(bprint, printf_format, get_name(ofilter->var)); \
141 for (p = ofilter->supported_list; *p != none; p++) { \
142 av_bprintf(bprint, printf_format "|", get_name(*p)); \
144 if (bprint->len > 0) \
145 bprint->str[--bprint->len] = '\0'; \
147 av_bprint_chars(bprint, ':', 1); \
150 //DEF_CHOOSE_FORMAT(pix_fmts, enum AVPixelFormat, format, formats, AV_PIX_FMT_NONE,
153 DEF_CHOOSE_FORMAT(sample_fmts, enum AVSampleFormat, format, formats,
154 AV_SAMPLE_FMT_NONE, "%s", av_get_sample_fmt_name)
156 DEF_CHOOSE_FORMAT(sample_rates, int, sample_rate, sample_rates, 0,
159 DEF_CHOOSE_FORMAT(channel_layouts, uint64_t, channel_layout, channel_layouts, 0,
162 int init_simple_filtergraph(InputStream *ist, OutputStream *ost)
164 FilterGraph *fg = av_mallocz(sizeof(*fg));
168 fg->index = nb_filtergraphs;
170 GROW_ARRAY(fg->outputs, fg->nb_outputs);
171 if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
173 fg->outputs[0]->ost = ost;
174 fg->outputs[0]->graph = fg;
175 fg->outputs[0]->format = -1;
177 ost->filter = fg->outputs[0];
179 GROW_ARRAY(fg->inputs, fg->nb_inputs);
180 if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
182 fg->inputs[0]->ist = ist;
183 fg->inputs[0]->graph = fg;
184 fg->inputs[0]->format = -1;
186 fg->inputs[0]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
187 if (!fg->inputs[0]->frame_queue)
190 GROW_ARRAY(ist->filters, ist->nb_filters);
191 ist->filters[ist->nb_filters - 1] = fg->inputs[0];
193 GROW_ARRAY(filtergraphs, nb_filtergraphs);
194 filtergraphs[nb_filtergraphs - 1] = fg;
199 static char *describe_filter_link(FilterGraph *fg, AVFilterInOut *inout, int in)
201 AVFilterContext *ctx = inout->filter_ctx;
202 AVFilterPad *pads = in ? ctx->input_pads : ctx->output_pads;
203 int nb_pads = in ? ctx->nb_inputs : ctx->nb_outputs;
207 if (avio_open_dyn_buf(&pb) < 0)
210 avio_printf(pb, "%s", ctx->filter->name);
212 avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));
214 avio_close_dyn_buf(pb, &res);
218 static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
220 InputStream *ist = NULL;
221 enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
224 // TODO: support other filter types
225 if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
226 av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
235 int file_idx = strtol(in->name, &p, 0);
237 if (file_idx < 0 || file_idx >= nb_input_files) {
238 av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtergraph description %s.\n",
239 file_idx, fg->graph_desc);
242 s = input_files[file_idx]->ctx;
244 for (i = 0; i < s->nb_streams; i++) {
245 enum AVMediaType stream_type = s->streams[i]->codecpar->codec_type;
246 if (stream_type != type &&
247 !(stream_type == AVMEDIA_TYPE_SUBTITLE &&
248 type == AVMEDIA_TYPE_VIDEO /* sub2video hack */))
250 if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
256 av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
257 "matches no streams.\n", p, fg->graph_desc);
260 ist = input_streams[input_files[file_idx]->ist_index + st->index];
261 if (ist->user_set_discard == AVDISCARD_ALL) {
262 av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
263 "matches a disabled input stream.\n", p, fg->graph_desc);
267 /* find the first unused stream of corresponding type */
268 for (i = 0; i < nb_input_streams; i++) {
269 ist = input_streams[i];
270 if (ist->user_set_discard == AVDISCARD_ALL)
272 if (ist->dec_ctx->codec_type == type && ist->discard)
275 if (i == nb_input_streams) {
276 av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
277 "unlabeled input pad %d on filter %s\n", in->pad_idx,
278 in->filter_ctx->name);
285 ist->decoding_needed |= DECODING_FOR_FILTER;
286 ist->st->discard = AVDISCARD_NONE;
288 GROW_ARRAY(fg->inputs, fg->nb_inputs);
289 if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
291 fg->inputs[fg->nb_inputs - 1]->ist = ist;
292 fg->inputs[fg->nb_inputs - 1]->graph = fg;
293 fg->inputs[fg->nb_inputs - 1]->format = -1;
294 fg->inputs[fg->nb_inputs - 1]->type = ist->st->codecpar->codec_type;
295 fg->inputs[fg->nb_inputs - 1]->name = describe_filter_link(fg, in, 1);
297 fg->inputs[fg->nb_inputs - 1]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
298 if (!fg->inputs[fg->nb_inputs - 1]->frame_queue)
301 GROW_ARRAY(ist->filters, ist->nb_filters);
302 ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
305 int init_complex_filtergraph(FilterGraph *fg)
307 AVFilterInOut *inputs, *outputs, *cur;
308 AVFilterGraph *graph;
311 /* this graph is only used for determining the kinds of inputs
312 * and outputs we have, and is discarded on exit from this function */
313 graph = avfilter_graph_alloc();
315 return AVERROR(ENOMEM);
316 graph->nb_threads = 1;
318 ret = avfilter_graph_parse2(graph, fg->graph_desc, &inputs, &outputs);
322 for (cur = inputs; cur; cur = cur->next)
323 init_input_filter(fg, cur);
325 for (cur = outputs; cur;) {
326 GROW_ARRAY(fg->outputs, fg->nb_outputs);
327 fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]));
328 if (!fg->outputs[fg->nb_outputs - 1])
331 fg->outputs[fg->nb_outputs - 1]->graph = fg;
332 fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
333 fg->outputs[fg->nb_outputs - 1]->type = avfilter_pad_get_type(cur->filter_ctx->output_pads,
335 fg->outputs[fg->nb_outputs - 1]->name = describe_filter_link(fg, cur, 0);
337 fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
341 avfilter_inout_free(&inputs);
342 avfilter_graph_free(&graph);
346 static int insert_trim(int64_t start_time, int64_t duration,
347 AVFilterContext **last_filter, int *pad_idx,
348 const char *filter_name)
350 AVFilterGraph *graph = (*last_filter)->graph;
351 AVFilterContext *ctx;
352 const AVFilter *trim;
353 enum AVMediaType type = avfilter_pad_get_type((*last_filter)->output_pads, *pad_idx);
354 const char *name = (type == AVMEDIA_TYPE_VIDEO) ? "trim" : "atrim";
357 if (duration == INT64_MAX && start_time == AV_NOPTS_VALUE)
360 trim = avfilter_get_by_name(name);
362 av_log(NULL, AV_LOG_ERROR, "%s filter not present, cannot limit "
363 "recording time.\n", name);
364 return AVERROR_FILTER_NOT_FOUND;
367 ctx = avfilter_graph_alloc_filter(graph, trim, filter_name);
369 return AVERROR(ENOMEM);
371 if (duration != INT64_MAX) {
372 ret = av_opt_set_int(ctx, "durationi", duration,
373 AV_OPT_SEARCH_CHILDREN);
375 if (ret >= 0 && start_time != AV_NOPTS_VALUE) {
376 ret = av_opt_set_int(ctx, "starti", start_time,
377 AV_OPT_SEARCH_CHILDREN);
380 av_log(ctx, AV_LOG_ERROR, "Error configuring the %s filter", name);
384 ret = avfilter_init_str(ctx, NULL);
388 ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
397 static int insert_filter(AVFilterContext **last_filter, int *pad_idx,
398 const char *filter_name, const char *args)
400 AVFilterGraph *graph = (*last_filter)->graph;
401 AVFilterContext *ctx;
404 ret = avfilter_graph_create_filter(&ctx,
405 avfilter_get_by_name(filter_name),
406 filter_name, args, NULL, graph);
410 ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
419 static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
422 OutputStream *ost = ofilter->ost;
423 OutputFile *of = output_files[ost->file_index];
424 AVFilterContext *last_filter = out->filter_ctx;
425 int pad_idx = out->pad_idx;
429 snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
430 ret = avfilter_graph_create_filter(&ofilter->filter,
431 avfilter_get_by_name("buffersink"),
432 name, NULL, NULL, fg->graph);
437 if ((ofilter->width || ofilter->height) && ofilter->ost->autoscale) {
439 AVFilterContext *filter;
440 AVDictionaryEntry *e = NULL;
442 snprintf(args, sizeof(args), "%d:%d",
443 ofilter->width, ofilter->height);
445 while ((e = av_dict_get(ost->sws_dict, "", e,
446 AV_DICT_IGNORE_SUFFIX))) {
447 av_strlcatf(args, sizeof(args), ":%s=%s", e->key, e->value);
450 snprintf(name, sizeof(name), "scaler_out_%d_%d",
451 ost->file_index, ost->index);
452 if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
453 name, args, NULL, fg->graph)) < 0)
455 if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
458 last_filter = filter;
462 if ((pix_fmts = choose_pix_fmts(ofilter))) {
463 AVFilterContext *filter;
465 ret = avfilter_graph_create_filter(&filter,
466 avfilter_get_by_name("format"),
467 "format", pix_fmts, NULL, fg->graph);
471 if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
474 last_filter = filter;
478 if (ost->frame_rate.num && 0) {
479 AVFilterContext *fps;
482 snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
483 ost->frame_rate.den);
484 snprintf(name, sizeof(name), "fps_out_%d_%d",
485 ost->file_index, ost->index);
486 ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
487 name, args, NULL, fg->graph);
491 ret = avfilter_link(last_filter, pad_idx, fps, 0);
498 snprintf(name, sizeof(name), "trim_out_%d_%d",
499 ost->file_index, ost->index);
500 ret = insert_trim(of->start_time, of->recording_time,
501 &last_filter, &pad_idx, name);
506 if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
512 static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
514 OutputStream *ost = ofilter->ost;
515 OutputFile *of = output_files[ost->file_index];
516 AVCodecContext *codec = ost->enc_ctx;
517 AVFilterContext *last_filter = out->filter_ctx;
518 int pad_idx = out->pad_idx;
523 snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
524 ret = avfilter_graph_create_filter(&ofilter->filter,
525 avfilter_get_by_name("abuffersink"),
526 name, NULL, NULL, fg->graph);
529 if ((ret = av_opt_set_int(ofilter->filter, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
532 #define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do { \
533 AVFilterContext *filt_ctx; \
535 av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
536 "similarly to -af " filter_name "=%s.\n", arg); \
538 ret = avfilter_graph_create_filter(&filt_ctx, \
539 avfilter_get_by_name(filter_name), \
540 filter_name, arg, NULL, fg->graph); \
544 ret = avfilter_link(last_filter, pad_idx, filt_ctx, 0); \
548 last_filter = filt_ctx; \
551 av_bprint_init(&args, 0, AV_BPRINT_SIZE_UNLIMITED);
552 if (ost->audio_channels_mapped) {
554 av_bprintf(&args, "0x%"PRIx64,
555 av_get_default_channel_layout(ost->audio_channels_mapped));
556 for (i = 0; i < ost->audio_channels_mapped; i++)
557 if (ost->audio_channels_map[i] != -1)
558 av_bprintf(&args, "|c%d=c%d", i, ost->audio_channels_map[i]);
560 AUTO_INSERT_FILTER("-map_channel", "pan", args.str);
561 av_bprint_clear(&args);
564 if (codec->channels && !codec->channel_layout)
565 codec->channel_layout = av_get_default_channel_layout(codec->channels);
567 choose_sample_fmts(ofilter, &args);
568 choose_sample_rates(ofilter, &args);
569 choose_channel_layouts(ofilter, &args);
570 if (!av_bprint_is_complete(&args)) {
571 ret = AVERROR(ENOMEM);
575 AVFilterContext *format;
577 snprintf(name, sizeof(name), "format_out_%d_%d",
578 ost->file_index, ost->index);
579 ret = avfilter_graph_create_filter(&format,
580 avfilter_get_by_name("aformat"),
581 name, args.str, NULL, fg->graph);
585 ret = avfilter_link(last_filter, pad_idx, format, 0);
589 last_filter = format;
593 if (ost->apad && of->shortest) {
596 for (i=0; i<of->ctx->nb_streams; i++)
597 if (of->ctx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
600 if (i<of->ctx->nb_streams) {
601 AUTO_INSERT_FILTER("-apad", "apad", ost->apad);
605 snprintf(name, sizeof(name), "trim for output stream %d:%d",
606 ost->file_index, ost->index);
607 ret = insert_trim(of->start_time, of->recording_time,
608 &last_filter, &pad_idx, name);
612 if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
615 av_bprint_finalize(&args, NULL);
620 static int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter,
624 av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", ofilter->name);
628 switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
629 case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
630 case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
631 default: av_assert0(0);
635 void check_filter_outputs(void)
638 for (i = 0; i < nb_filtergraphs; i++) {
640 for (n = 0; n < filtergraphs[i]->nb_outputs; n++) {
641 OutputFilter *output = filtergraphs[i]->outputs[n];
643 av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", output->name);
650 static int sub2video_prepare(InputStream *ist, InputFilter *ifilter)
652 AVFormatContext *avf = input_files[ist->file_index]->ctx;
655 /* Compute the size of the canvas for the subtitles stream.
656 If the subtitles codecpar has set a size, use it. Otherwise use the
657 maximum dimensions of the video streams in the same file. */
661 for (i = 0; i < avf->nb_streams; i++) {
662 if (avf->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
663 w = FFMAX(w, avf->streams[i]->codecpar->width);
664 h = FFMAX(h, avf->streams[i]->codecpar->height);
671 av_log(avf, AV_LOG_INFO, "sub2video: using %dx%d canvas\n", w, h);
673 ist->sub2video.w = ifilter->width = w;
674 ist->sub2video.h = ifilter->height = h;
676 ifilter->width = ist->dec_ctx->width ? ist->dec_ctx->width : ist->sub2video.w;
677 ifilter->height = ist->dec_ctx->height ? ist->dec_ctx->height : ist->sub2video.h;
679 /* rectangles are AV_PIX_FMT_PAL8, but we have no guarantee that the
680 palettes for all rectangles are identical or compatible */
681 ifilter->format = AV_PIX_FMT_RGB32;
683 ist->sub2video.frame = av_frame_alloc();
684 if (!ist->sub2video.frame)
685 return AVERROR(ENOMEM);
686 ist->sub2video.last_pts = INT64_MIN;
687 ist->sub2video.end_pts = INT64_MIN;
689 /* sub2video structure has been (re-)initialized.
690 Mark it as such so that the system will be
691 initialized with the first received heartbeat. */
692 ist->sub2video.initialize = 1;
697 static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
700 AVFilterContext *last_filter;
701 const AVFilter *buffer_filt = avfilter_get_by_name("buffer");
702 InputStream *ist = ifilter->ist;
703 InputFile *f = input_files[ist->file_index];
704 AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
706 AVRational fr = ist->framerate;
710 int ret, pad_idx = 0;
711 int64_t tsoffset = 0;
712 AVBufferSrcParameters *par = av_buffersrc_parameters_alloc();
715 return AVERROR(ENOMEM);
716 memset(par, 0, sizeof(*par));
717 par->format = AV_PIX_FMT_NONE;
719 if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
720 av_log(NULL, AV_LOG_ERROR, "Cannot connect video filter to audio input\n");
721 ret = AVERROR(EINVAL);
726 fr = av_guess_frame_rate(input_files[ist->file_index]->ctx, ist->st, NULL);
728 if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
729 ret = sub2video_prepare(ist, ifilter);
734 sar = ifilter->sample_aspect_ratio;
736 sar = (AVRational){0,1};
737 av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
739 "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:"
740 "pixel_aspect=%d/%d",
741 ifilter->width, ifilter->height, ifilter->format,
742 tb.num, tb.den, sar.num, sar.den);
743 if (fr.num && fr.den)
744 av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
745 snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
746 ist->file_index, ist->st->index);
749 if ((ret = avfilter_graph_create_filter(&ifilter->filter, buffer_filt, name,
750 args.str, NULL, fg->graph)) < 0)
752 par->hw_frames_ctx = ifilter->hw_frames_ctx;
753 ret = av_buffersrc_parameters_set(ifilter->filter, par);
757 last_filter = ifilter->filter;
759 if (ist->autorotate) {
760 double theta = get_rotation(ist->st);
762 if (fabs(theta - 90) < 1.0) {
763 ret = insert_filter(&last_filter, &pad_idx, "transpose", "clock");
764 } else if (fabs(theta - 180) < 1.0) {
765 ret = insert_filter(&last_filter, &pad_idx, "hflip", NULL);
768 ret = insert_filter(&last_filter, &pad_idx, "vflip", NULL);
769 } else if (fabs(theta - 270) < 1.0) {
770 ret = insert_filter(&last_filter, &pad_idx, "transpose", "cclock");
771 } else if (fabs(theta) > 1.0) {
773 snprintf(rotate_buf, sizeof(rotate_buf), "%f*PI/180", theta);
774 ret = insert_filter(&last_filter, &pad_idx, "rotate", rotate_buf);
780 if (do_deinterlace) {
781 AVFilterContext *yadif;
783 snprintf(name, sizeof(name), "deinterlace_in_%d_%d",
784 ist->file_index, ist->st->index);
785 if ((ret = avfilter_graph_create_filter(&yadif,
786 avfilter_get_by_name("yadif"),
791 if ((ret = avfilter_link(last_filter, 0, yadif, 0)) < 0)
797 snprintf(name, sizeof(name), "trim_in_%d_%d",
798 ist->file_index, ist->st->index);
800 tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
801 if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
802 tsoffset += f->ctx->start_time;
804 ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
805 AV_NOPTS_VALUE : tsoffset, f->recording_time,
806 &last_filter, &pad_idx, name);
810 if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
819 static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
822 AVFilterContext *last_filter;
823 const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer");
824 InputStream *ist = ifilter->ist;
825 InputFile *f = input_files[ist->file_index];
828 int ret, pad_idx = 0;
829 int64_t tsoffset = 0;
831 if (ist->dec_ctx->codec_type != AVMEDIA_TYPE_AUDIO) {
832 av_log(NULL, AV_LOG_ERROR, "Cannot connect audio filter to non audio input\n");
833 return AVERROR(EINVAL);
836 av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
837 av_bprintf(&args, "time_base=%d/%d:sample_rate=%d:sample_fmt=%s",
838 1, ifilter->sample_rate,
839 ifilter->sample_rate,
840 av_get_sample_fmt_name(ifilter->format));
841 if (ifilter->channel_layout)
842 av_bprintf(&args, ":channel_layout=0x%"PRIx64,
843 ifilter->channel_layout);
845 av_bprintf(&args, ":channels=%d", ifilter->channels);
846 snprintf(name, sizeof(name), "graph_%d_in_%d_%d", fg->index,
847 ist->file_index, ist->st->index);
849 if ((ret = avfilter_graph_create_filter(&ifilter->filter, abuffer_filt,
850 name, args.str, NULL,
853 last_filter = ifilter->filter;
855 #define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg) do { \
856 AVFilterContext *filt_ctx; \
858 av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
859 "similarly to -af " filter_name "=%s.\n", arg); \
861 snprintf(name, sizeof(name), "graph_%d_%s_in_%d_%d", \
862 fg->index, filter_name, ist->file_index, ist->st->index); \
863 ret = avfilter_graph_create_filter(&filt_ctx, \
864 avfilter_get_by_name(filter_name), \
865 name, arg, NULL, fg->graph); \
869 ret = avfilter_link(last_filter, 0, filt_ctx, 0); \
873 last_filter = filt_ctx; \
876 if (audio_sync_method > 0) {
877 char args[256] = {0};
879 av_strlcatf(args, sizeof(args), "async=%d", audio_sync_method);
880 if (audio_drift_threshold != 0.1)
881 av_strlcatf(args, sizeof(args), ":min_hard_comp=%f", audio_drift_threshold);
882 if (!fg->reconfiguration)
883 av_strlcatf(args, sizeof(args), ":first_pts=0");
884 AUTO_INSERT_FILTER_INPUT("-async", "aresample", args);
887 // if (ost->audio_channels_mapped) {
890 // av_bprint_init(&pan_buf, 256, 8192);
891 // av_bprintf(&pan_buf, "0x%"PRIx64,
892 // av_get_default_channel_layout(ost->audio_channels_mapped));
893 // for (i = 0; i < ost->audio_channels_mapped; i++)
894 // if (ost->audio_channels_map[i] != -1)
895 // av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
896 // AUTO_INSERT_FILTER_INPUT("-map_channel", "pan", pan_buf.str);
897 // av_bprint_finalize(&pan_buf, NULL);
900 if (audio_volume != 256) {
903 av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume "
904 "audio filter instead.\n");
906 snprintf(args, sizeof(args), "%f", audio_volume / 256.);
907 AUTO_INSERT_FILTER_INPUT("-vol", "volume", args);
910 snprintf(name, sizeof(name), "trim for input stream %d:%d",
911 ist->file_index, ist->st->index);
913 tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
914 if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
915 tsoffset += f->ctx->start_time;
917 ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
918 AV_NOPTS_VALUE : tsoffset, f->recording_time,
919 &last_filter, &pad_idx, name);
923 if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
929 static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
932 if (!ifilter->ist->dec) {
933 av_log(NULL, AV_LOG_ERROR,
934 "No decoder for stream #%d:%d, filtering impossible\n",
935 ifilter->ist->file_index, ifilter->ist->st->index);
936 return AVERROR_DECODER_NOT_FOUND;
938 switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
939 case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
940 case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
941 default: av_assert0(0);
945 static void cleanup_filtergraph(FilterGraph *fg)
948 for (i = 0; i < fg->nb_outputs; i++)
949 fg->outputs[i]->filter = (AVFilterContext *)NULL;
950 for (i = 0; i < fg->nb_inputs; i++)
951 fg->inputs[i]->filter = (AVFilterContext *)NULL;
952 avfilter_graph_free(&fg->graph);
955 int configure_filtergraph(FilterGraph *fg)
957 AVFilterInOut *inputs, *outputs, *cur;
958 int ret, i, simple = filtergraph_is_simple(fg);
959 const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
962 cleanup_filtergraph(fg);
963 if (!(fg->graph = avfilter_graph_alloc()))
964 return AVERROR(ENOMEM);
967 OutputStream *ost = fg->outputs[0]->ost;
969 AVDictionaryEntry *e = NULL;
971 fg->graph->nb_threads = filter_nbthreads;
974 while ((e = av_dict_get(ost->sws_dict, "", e,
975 AV_DICT_IGNORE_SUFFIX))) {
976 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
979 args[strlen(args)-1] = 0;
980 fg->graph->scale_sws_opts = av_strdup(args);
983 while ((e = av_dict_get(ost->swr_opts, "", e,
984 AV_DICT_IGNORE_SUFFIX))) {
985 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
988 args[strlen(args)-1] = 0;
989 av_opt_set(fg->graph, "aresample_swr_opts", args, 0);
992 while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e,
993 AV_DICT_IGNORE_SUFFIX))) {
994 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
997 args[strlen(args) - 1] = '\0';
999 e = av_dict_get(ost->encoder_opts, "threads", NULL, 0);
1001 av_opt_set(fg->graph, "threads", e->value, 0);
1003 fg->graph->nb_threads = filter_complex_nbthreads;
1006 if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
1009 ret = hw_device_setup_for_filter(fg);
1013 if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
1014 const char *num_inputs;
1015 const char *num_outputs;
1018 } else if (outputs->next) {
1025 } else if (inputs->next) {
1030 av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' was expected "
1031 "to have exactly 1 input and 1 output."
1032 " However, it had %s input(s) and %s output(s)."
1033 " Please adjust, or use a complex filtergraph (-filter_complex) instead.\n",
1034 graph_desc, num_inputs, num_outputs);
1035 ret = AVERROR(EINVAL);
1039 for (cur = inputs, i = 0; cur; cur = cur->next, i++)
1040 if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0) {
1041 avfilter_inout_free(&inputs);
1042 avfilter_inout_free(&outputs);
1045 avfilter_inout_free(&inputs);
1047 for (cur = outputs, i = 0; cur; cur = cur->next, i++)
1048 configure_output_filter(fg, fg->outputs[i], cur);
1049 avfilter_inout_free(&outputs);
1051 if (!auto_conversion_filters)
1052 avfilter_graph_set_auto_convert(fg->graph, AVFILTER_AUTO_CONVERT_NONE);
1053 if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
1056 /* limit the lists of allowed formats to the ones selected, to
1057 * make sure they stay the same if the filtergraph is reconfigured later */
1058 for (i = 0; i < fg->nb_outputs; i++) {
1059 OutputFilter *ofilter = fg->outputs[i];
1060 AVFilterContext *sink = ofilter->filter;
1062 ofilter->format = av_buffersink_get_format(sink);
1064 ofilter->width = av_buffersink_get_w(sink);
1065 ofilter->height = av_buffersink_get_h(sink);
1067 ofilter->sample_rate = av_buffersink_get_sample_rate(sink);
1068 ofilter->channel_layout = av_buffersink_get_channel_layout(sink);
1071 fg->reconfiguration = 1;
1073 for (i = 0; i < fg->nb_outputs; i++) {
1074 OutputStream *ost = fg->outputs[i]->ost;
1076 /* identical to the same check in ffmpeg.c, needed because
1077 complex filter graphs are initialized earlier */
1078 av_log(NULL, AV_LOG_ERROR, "Encoder (codec %s) not found for output stream #%d:%d\n",
1079 avcodec_get_name(ost->st->codecpar->codec_id), ost->file_index, ost->index);
1080 ret = AVERROR(EINVAL);
1083 if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1084 !(ost->enc->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE))
1085 av_buffersink_set_frame_size(ost->filter->filter,
1086 ost->enc_ctx->frame_size);
1089 for (i = 0; i < fg->nb_inputs; i++) {
1090 while (av_fifo_size(fg->inputs[i]->frame_queue)) {
1092 av_fifo_generic_read(fg->inputs[i]->frame_queue, &tmp, sizeof(tmp), NULL);
1093 ret = av_buffersrc_add_frame(fg->inputs[i]->filter, tmp);
1094 av_frame_free(&tmp);
1100 /* send the EOFs for the finished inputs */
1101 for (i = 0; i < fg->nb_inputs; i++) {
1102 if (fg->inputs[i]->eof) {
1103 ret = av_buffersrc_add_frame(fg->inputs[i]->filter, NULL);
1109 /* process queued up subtitle packets */
1110 for (i = 0; i < fg->nb_inputs; i++) {
1111 InputStream *ist = fg->inputs[i]->ist;
1112 if (ist->sub2video.sub_queue && ist->sub2video.frame) {
1113 while (av_fifo_size(ist->sub2video.sub_queue)) {
1115 av_fifo_generic_read(ist->sub2video.sub_queue, &tmp, sizeof(tmp), NULL);
1116 sub2video_update(ist, INT64_MIN, &tmp);
1117 avsubtitle_free(&tmp);
1125 cleanup_filtergraph(fg);
1129 int ifilter_parameters_from_frame(InputFilter *ifilter, const AVFrame *frame)
1131 av_buffer_unref(&ifilter->hw_frames_ctx);
1133 ifilter->format = frame->format;
1135 ifilter->width = frame->width;
1136 ifilter->height = frame->height;
1137 ifilter->sample_aspect_ratio = frame->sample_aspect_ratio;
1139 ifilter->sample_rate = frame->sample_rate;
1140 ifilter->channels = frame->channels;
1141 ifilter->channel_layout = frame->channel_layout;
1143 if (frame->hw_frames_ctx) {
1144 ifilter->hw_frames_ctx = av_buffer_ref(frame->hw_frames_ctx);
1145 if (!ifilter->hw_frames_ctx)
1146 return AVERROR(ENOMEM);
1152 int filtergraph_is_simple(FilterGraph *fg)
1154 return !fg->graph_desc;