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 appending a list of allowed formats
131 * to an AVBPrint. If nonempty, the list will have a header. */
132 #define DEF_CHOOSE_FORMAT(name, type, var, supported_list, none, printf_format, get_name) \
133 static void choose_ ## name (OutputFilter *ofilter, AVBPrint *bprint) \
135 if (ofilter->var == none && !ofilter->supported_list) \
137 av_bprintf(bprint, #name "="); \
138 if (ofilter->var != none) { \
139 av_bprintf(bprint, printf_format, get_name(ofilter->var)); \
143 for (p = ofilter->supported_list; *p != none; p++) { \
144 av_bprintf(bprint, printf_format "|", get_name(*p)); \
146 if (bprint->len > 0) \
147 bprint->str[--bprint->len] = '\0'; \
149 av_bprint_chars(bprint, ':', 1); \
152 //DEF_CHOOSE_FORMAT(pix_fmts, enum AVPixelFormat, format, formats, AV_PIX_FMT_NONE,
155 DEF_CHOOSE_FORMAT(sample_fmts, enum AVSampleFormat, format, formats,
156 AV_SAMPLE_FMT_NONE, "%s", av_get_sample_fmt_name)
158 DEF_CHOOSE_FORMAT(sample_rates, int, sample_rate, sample_rates, 0,
161 DEF_CHOOSE_FORMAT(channel_layouts, uint64_t, channel_layout, channel_layouts, 0,
164 int init_simple_filtergraph(InputStream *ist, OutputStream *ost)
166 FilterGraph *fg = av_mallocz(sizeof(*fg));
170 fg->index = nb_filtergraphs;
172 GROW_ARRAY(fg->outputs, fg->nb_outputs);
173 if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
175 fg->outputs[0]->ost = ost;
176 fg->outputs[0]->graph = fg;
177 fg->outputs[0]->format = -1;
179 ost->filter = fg->outputs[0];
181 GROW_ARRAY(fg->inputs, fg->nb_inputs);
182 if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
184 fg->inputs[0]->ist = ist;
185 fg->inputs[0]->graph = fg;
186 fg->inputs[0]->format = -1;
188 fg->inputs[0]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
189 if (!fg->inputs[0]->frame_queue)
192 GROW_ARRAY(ist->filters, ist->nb_filters);
193 ist->filters[ist->nb_filters - 1] = fg->inputs[0];
195 GROW_ARRAY(filtergraphs, nb_filtergraphs);
196 filtergraphs[nb_filtergraphs - 1] = fg;
201 static char *describe_filter_link(FilterGraph *fg, AVFilterInOut *inout, int in)
203 AVFilterContext *ctx = inout->filter_ctx;
204 AVFilterPad *pads = in ? ctx->input_pads : ctx->output_pads;
205 int nb_pads = in ? ctx->nb_inputs : ctx->nb_outputs;
209 if (avio_open_dyn_buf(&pb) < 0)
212 avio_printf(pb, "%s", ctx->filter->name);
214 avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));
216 avio_close_dyn_buf(pb, &res);
220 static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
222 InputStream *ist = NULL;
223 enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
226 // TODO: support other filter types
227 if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
228 av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
237 int file_idx = strtol(in->name, &p, 0);
239 if (file_idx < 0 || file_idx >= nb_input_files) {
240 av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtergraph description %s.\n",
241 file_idx, fg->graph_desc);
244 s = input_files[file_idx]->ctx;
246 for (i = 0; i < s->nb_streams; i++) {
247 enum AVMediaType stream_type = s->streams[i]->codecpar->codec_type;
248 if (stream_type != type &&
249 !(stream_type == AVMEDIA_TYPE_SUBTITLE &&
250 type == AVMEDIA_TYPE_VIDEO /* sub2video hack */))
252 if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
258 av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
259 "matches no streams.\n", p, fg->graph_desc);
262 ist = input_streams[input_files[file_idx]->ist_index + st->index];
263 if (ist->user_set_discard == AVDISCARD_ALL) {
264 av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
265 "matches a disabled input stream.\n", p, fg->graph_desc);
269 /* find the first unused stream of corresponding type */
270 for (i = 0; i < nb_input_streams; i++) {
271 ist = input_streams[i];
272 if (ist->user_set_discard == AVDISCARD_ALL)
274 if (ist->dec_ctx->codec_type == type && ist->discard)
277 if (i == nb_input_streams) {
278 av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
279 "unlabeled input pad %d on filter %s\n", in->pad_idx,
280 in->filter_ctx->name);
287 ist->decoding_needed |= DECODING_FOR_FILTER;
288 ist->st->discard = AVDISCARD_NONE;
290 GROW_ARRAY(fg->inputs, fg->nb_inputs);
291 if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
293 fg->inputs[fg->nb_inputs - 1]->ist = ist;
294 fg->inputs[fg->nb_inputs - 1]->graph = fg;
295 fg->inputs[fg->nb_inputs - 1]->format = -1;
296 fg->inputs[fg->nb_inputs - 1]->type = ist->st->codecpar->codec_type;
297 fg->inputs[fg->nb_inputs - 1]->name = describe_filter_link(fg, in, 1);
299 fg->inputs[fg->nb_inputs - 1]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
300 if (!fg->inputs[fg->nb_inputs - 1]->frame_queue)
303 GROW_ARRAY(ist->filters, ist->nb_filters);
304 ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
307 int init_complex_filtergraph(FilterGraph *fg)
309 AVFilterInOut *inputs, *outputs, *cur;
310 AVFilterGraph *graph;
313 /* this graph is only used for determining the kinds of inputs
314 * and outputs we have, and is discarded on exit from this function */
315 graph = avfilter_graph_alloc();
317 return AVERROR(ENOMEM);
318 graph->nb_threads = 1;
320 ret = avfilter_graph_parse2(graph, fg->graph_desc, &inputs, &outputs);
324 for (cur = inputs; cur; cur = cur->next)
325 init_input_filter(fg, cur);
327 for (cur = outputs; cur;) {
328 GROW_ARRAY(fg->outputs, fg->nb_outputs);
329 fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]));
330 if (!fg->outputs[fg->nb_outputs - 1])
333 fg->outputs[fg->nb_outputs - 1]->graph = fg;
334 fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
335 fg->outputs[fg->nb_outputs - 1]->type = avfilter_pad_get_type(cur->filter_ctx->output_pads,
337 fg->outputs[fg->nb_outputs - 1]->name = describe_filter_link(fg, cur, 0);
339 fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
343 avfilter_inout_free(&inputs);
344 avfilter_graph_free(&graph);
348 static int insert_trim(int64_t start_time, int64_t duration,
349 AVFilterContext **last_filter, int *pad_idx,
350 const char *filter_name)
352 AVFilterGraph *graph = (*last_filter)->graph;
353 AVFilterContext *ctx;
354 const AVFilter *trim;
355 enum AVMediaType type = avfilter_pad_get_type((*last_filter)->output_pads, *pad_idx);
356 const char *name = (type == AVMEDIA_TYPE_VIDEO) ? "trim" : "atrim";
359 if (duration == INT64_MAX && start_time == AV_NOPTS_VALUE)
362 trim = avfilter_get_by_name(name);
364 av_log(NULL, AV_LOG_ERROR, "%s filter not present, cannot limit "
365 "recording time.\n", name);
366 return AVERROR_FILTER_NOT_FOUND;
369 ctx = avfilter_graph_alloc_filter(graph, trim, filter_name);
371 return AVERROR(ENOMEM);
373 if (duration != INT64_MAX) {
374 ret = av_opt_set_int(ctx, "durationi", duration,
375 AV_OPT_SEARCH_CHILDREN);
377 if (ret >= 0 && start_time != AV_NOPTS_VALUE) {
378 ret = av_opt_set_int(ctx, "starti", start_time,
379 AV_OPT_SEARCH_CHILDREN);
382 av_log(ctx, AV_LOG_ERROR, "Error configuring the %s filter", name);
386 ret = avfilter_init_str(ctx, NULL);
390 ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
399 static int insert_filter(AVFilterContext **last_filter, int *pad_idx,
400 const char *filter_name, const char *args)
402 AVFilterGraph *graph = (*last_filter)->graph;
403 AVFilterContext *ctx;
406 ret = avfilter_graph_create_filter(&ctx,
407 avfilter_get_by_name(filter_name),
408 filter_name, args, NULL, graph);
412 ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
421 static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
424 OutputStream *ost = ofilter->ost;
425 OutputFile *of = output_files[ost->file_index];
426 AVFilterContext *last_filter = out->filter_ctx;
427 int pad_idx = out->pad_idx;
431 snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
432 ret = avfilter_graph_create_filter(&ofilter->filter,
433 avfilter_get_by_name("buffersink"),
434 name, NULL, NULL, fg->graph);
439 if ((ofilter->width || ofilter->height) && ofilter->ost->autoscale) {
441 AVFilterContext *filter;
442 AVDictionaryEntry *e = NULL;
444 snprintf(args, sizeof(args), "%d:%d",
445 ofilter->width, ofilter->height);
447 while ((e = av_dict_get(ost->sws_dict, "", e,
448 AV_DICT_IGNORE_SUFFIX))) {
449 av_strlcatf(args, sizeof(args), ":%s=%s", e->key, e->value);
452 snprintf(name, sizeof(name), "scaler_out_%d_%d",
453 ost->file_index, ost->index);
454 if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
455 name, args, NULL, fg->graph)) < 0)
457 if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
460 last_filter = filter;
464 if ((pix_fmts = choose_pix_fmts(ofilter))) {
465 AVFilterContext *filter;
467 ret = avfilter_graph_create_filter(&filter,
468 avfilter_get_by_name("format"),
469 "format", pix_fmts, NULL, fg->graph);
473 if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
476 last_filter = filter;
480 if (ost->frame_rate.num && 0) {
481 AVFilterContext *fps;
484 snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
485 ost->frame_rate.den);
486 snprintf(name, sizeof(name), "fps_out_%d_%d",
487 ost->file_index, ost->index);
488 ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
489 name, args, NULL, fg->graph);
493 ret = avfilter_link(last_filter, pad_idx, fps, 0);
500 snprintf(name, sizeof(name), "trim_out_%d_%d",
501 ost->file_index, ost->index);
502 ret = insert_trim(of->start_time, of->recording_time,
503 &last_filter, &pad_idx, name);
508 if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
514 static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
516 OutputStream *ost = ofilter->ost;
517 OutputFile *of = output_files[ost->file_index];
518 AVCodecContext *codec = ost->enc_ctx;
519 AVFilterContext *last_filter = out->filter_ctx;
520 int pad_idx = out->pad_idx;
525 snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
526 ret = avfilter_graph_create_filter(&ofilter->filter,
527 avfilter_get_by_name("abuffersink"),
528 name, NULL, NULL, fg->graph);
531 if ((ret = av_opt_set_int(ofilter->filter, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
534 #define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do { \
535 AVFilterContext *filt_ctx; \
537 av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
538 "similarly to -af " filter_name "=%s.\n", arg); \
540 ret = avfilter_graph_create_filter(&filt_ctx, \
541 avfilter_get_by_name(filter_name), \
542 filter_name, arg, NULL, fg->graph); \
546 ret = avfilter_link(last_filter, pad_idx, filt_ctx, 0); \
550 last_filter = filt_ctx; \
553 av_bprint_init(&args, 0, AV_BPRINT_SIZE_UNLIMITED);
554 if (ost->audio_channels_mapped) {
556 av_bprintf(&args, "0x%"PRIx64,
557 av_get_default_channel_layout(ost->audio_channels_mapped));
558 for (i = 0; i < ost->audio_channels_mapped; i++)
559 if (ost->audio_channels_map[i] != -1)
560 av_bprintf(&args, "|c%d=c%d", i, ost->audio_channels_map[i]);
562 AUTO_INSERT_FILTER("-map_channel", "pan", args.str);
563 av_bprint_clear(&args);
566 if (codec->channels && !codec->channel_layout)
567 codec->channel_layout = av_get_default_channel_layout(codec->channels);
569 choose_sample_fmts(ofilter, &args);
570 choose_sample_rates(ofilter, &args);
571 choose_channel_layouts(ofilter, &args);
572 if (!av_bprint_is_complete(&args)) {
573 ret = AVERROR(ENOMEM);
577 AVFilterContext *format;
579 snprintf(name, sizeof(name), "format_out_%d_%d",
580 ost->file_index, ost->index);
581 ret = avfilter_graph_create_filter(&format,
582 avfilter_get_by_name("aformat"),
583 name, args.str, NULL, fg->graph);
587 ret = avfilter_link(last_filter, pad_idx, format, 0);
591 last_filter = format;
595 if (ost->apad && of->shortest) {
598 for (i=0; i<of->ctx->nb_streams; i++)
599 if (of->ctx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
602 if (i<of->ctx->nb_streams) {
603 AUTO_INSERT_FILTER("-apad", "apad", ost->apad);
607 snprintf(name, sizeof(name), "trim for output stream %d:%d",
608 ost->file_index, ost->index);
609 ret = insert_trim(of->start_time, of->recording_time,
610 &last_filter, &pad_idx, name);
614 if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
617 av_bprint_finalize(&args, NULL);
622 static int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter,
626 av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", ofilter->name);
630 switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
631 case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
632 case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
633 default: av_assert0(0);
637 void check_filter_outputs(void)
640 for (i = 0; i < nb_filtergraphs; i++) {
642 for (n = 0; n < filtergraphs[i]->nb_outputs; n++) {
643 OutputFilter *output = filtergraphs[i]->outputs[n];
645 av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", output->name);
652 static int sub2video_prepare(InputStream *ist, InputFilter *ifilter)
654 AVFormatContext *avf = input_files[ist->file_index]->ctx;
657 /* Compute the size of the canvas for the subtitles stream.
658 If the subtitles codecpar has set a size, use it. Otherwise use the
659 maximum dimensions of the video streams in the same file. */
663 for (i = 0; i < avf->nb_streams; i++) {
664 if (avf->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
665 w = FFMAX(w, avf->streams[i]->codecpar->width);
666 h = FFMAX(h, avf->streams[i]->codecpar->height);
673 av_log(avf, AV_LOG_INFO, "sub2video: using %dx%d canvas\n", w, h);
675 ist->sub2video.w = ifilter->width = w;
676 ist->sub2video.h = ifilter->height = h;
678 ifilter->width = ist->dec_ctx->width ? ist->dec_ctx->width : ist->sub2video.w;
679 ifilter->height = ist->dec_ctx->height ? ist->dec_ctx->height : ist->sub2video.h;
681 /* rectangles are AV_PIX_FMT_PAL8, but we have no guarantee that the
682 palettes for all rectangles are identical or compatible */
683 ifilter->format = AV_PIX_FMT_RGB32;
685 ist->sub2video.frame = av_frame_alloc();
686 if (!ist->sub2video.frame)
687 return AVERROR(ENOMEM);
688 ist->sub2video.last_pts = INT64_MIN;
689 ist->sub2video.end_pts = INT64_MIN;
691 /* sub2video structure has been (re-)initialized.
692 Mark it as such so that the system will be
693 initialized with the first received heartbeat. */
694 ist->sub2video.initialize = 1;
699 static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
702 AVFilterContext *last_filter;
703 const AVFilter *buffer_filt = avfilter_get_by_name("buffer");
704 InputStream *ist = ifilter->ist;
705 InputFile *f = input_files[ist->file_index];
706 AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
708 AVRational fr = ist->framerate;
712 int ret, pad_idx = 0;
713 int64_t tsoffset = 0;
714 AVBufferSrcParameters *par = av_buffersrc_parameters_alloc();
717 return AVERROR(ENOMEM);
718 memset(par, 0, sizeof(*par));
719 par->format = AV_PIX_FMT_NONE;
721 if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
722 av_log(NULL, AV_LOG_ERROR, "Cannot connect video filter to audio input\n");
723 ret = AVERROR(EINVAL);
728 fr = av_guess_frame_rate(input_files[ist->file_index]->ctx, ist->st, NULL);
730 if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
731 ret = sub2video_prepare(ist, ifilter);
736 sar = ifilter->sample_aspect_ratio;
738 sar = (AVRational){0,1};
739 av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
741 "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:"
742 "pixel_aspect=%d/%d",
743 ifilter->width, ifilter->height, ifilter->format,
744 tb.num, tb.den, sar.num, sar.den);
745 if (fr.num && fr.den)
746 av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
747 snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
748 ist->file_index, ist->st->index);
751 if ((ret = avfilter_graph_create_filter(&ifilter->filter, buffer_filt, name,
752 args.str, NULL, fg->graph)) < 0)
754 par->hw_frames_ctx = ifilter->hw_frames_ctx;
755 ret = av_buffersrc_parameters_set(ifilter->filter, par);
759 last_filter = ifilter->filter;
761 if (ist->autorotate) {
762 double theta = get_rotation(ist->st);
764 if (fabs(theta - 90) < 1.0) {
765 ret = insert_filter(&last_filter, &pad_idx, "transpose", "clock");
766 } else if (fabs(theta - 180) < 1.0) {
767 ret = insert_filter(&last_filter, &pad_idx, "hflip", NULL);
770 ret = insert_filter(&last_filter, &pad_idx, "vflip", NULL);
771 } else if (fabs(theta - 270) < 1.0) {
772 ret = insert_filter(&last_filter, &pad_idx, "transpose", "cclock");
773 } else if (fabs(theta) > 1.0) {
775 snprintf(rotate_buf, sizeof(rotate_buf), "%f*PI/180", theta);
776 ret = insert_filter(&last_filter, &pad_idx, "rotate", rotate_buf);
782 if (do_deinterlace) {
783 AVFilterContext *yadif;
785 snprintf(name, sizeof(name), "deinterlace_in_%d_%d",
786 ist->file_index, ist->st->index);
787 if ((ret = avfilter_graph_create_filter(&yadif,
788 avfilter_get_by_name("yadif"),
793 if ((ret = avfilter_link(last_filter, 0, yadif, 0)) < 0)
799 snprintf(name, sizeof(name), "trim_in_%d_%d",
800 ist->file_index, ist->st->index);
802 tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
803 if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
804 tsoffset += f->ctx->start_time;
806 ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
807 AV_NOPTS_VALUE : tsoffset, f->recording_time,
808 &last_filter, &pad_idx, name);
812 if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
821 static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
824 AVFilterContext *last_filter;
825 const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer");
826 InputStream *ist = ifilter->ist;
827 InputFile *f = input_files[ist->file_index];
830 int ret, pad_idx = 0;
831 int64_t tsoffset = 0;
833 if (ist->dec_ctx->codec_type != AVMEDIA_TYPE_AUDIO) {
834 av_log(NULL, AV_LOG_ERROR, "Cannot connect audio filter to non audio input\n");
835 return AVERROR(EINVAL);
838 av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
839 av_bprintf(&args, "time_base=%d/%d:sample_rate=%d:sample_fmt=%s",
840 1, ifilter->sample_rate,
841 ifilter->sample_rate,
842 av_get_sample_fmt_name(ifilter->format));
843 if (ifilter->channel_layout)
844 av_bprintf(&args, ":channel_layout=0x%"PRIx64,
845 ifilter->channel_layout);
847 av_bprintf(&args, ":channels=%d", ifilter->channels);
848 snprintf(name, sizeof(name), "graph_%d_in_%d_%d", fg->index,
849 ist->file_index, ist->st->index);
851 if ((ret = avfilter_graph_create_filter(&ifilter->filter, abuffer_filt,
852 name, args.str, NULL,
855 last_filter = ifilter->filter;
857 #define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg) do { \
858 AVFilterContext *filt_ctx; \
860 av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
861 "similarly to -af " filter_name "=%s.\n", arg); \
863 snprintf(name, sizeof(name), "graph_%d_%s_in_%d_%d", \
864 fg->index, filter_name, ist->file_index, ist->st->index); \
865 ret = avfilter_graph_create_filter(&filt_ctx, \
866 avfilter_get_by_name(filter_name), \
867 name, arg, NULL, fg->graph); \
871 ret = avfilter_link(last_filter, 0, filt_ctx, 0); \
875 last_filter = filt_ctx; \
878 if (audio_sync_method > 0) {
879 char args[256] = {0};
881 av_strlcatf(args, sizeof(args), "async=%d", audio_sync_method);
882 if (audio_drift_threshold != 0.1)
883 av_strlcatf(args, sizeof(args), ":min_hard_comp=%f", audio_drift_threshold);
884 if (!fg->reconfiguration)
885 av_strlcatf(args, sizeof(args), ":first_pts=0");
886 AUTO_INSERT_FILTER_INPUT("-async", "aresample", args);
889 // if (ost->audio_channels_mapped) {
892 // av_bprint_init(&pan_buf, 256, 8192);
893 // av_bprintf(&pan_buf, "0x%"PRIx64,
894 // av_get_default_channel_layout(ost->audio_channels_mapped));
895 // for (i = 0; i < ost->audio_channels_mapped; i++)
896 // if (ost->audio_channels_map[i] != -1)
897 // av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
898 // AUTO_INSERT_FILTER_INPUT("-map_channel", "pan", pan_buf.str);
899 // av_bprint_finalize(&pan_buf, NULL);
902 if (audio_volume != 256) {
905 av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume "
906 "audio filter instead.\n");
908 snprintf(args, sizeof(args), "%f", audio_volume / 256.);
909 AUTO_INSERT_FILTER_INPUT("-vol", "volume", args);
912 snprintf(name, sizeof(name), "trim for input stream %d:%d",
913 ist->file_index, ist->st->index);
915 tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
916 if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
917 tsoffset += f->ctx->start_time;
919 ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
920 AV_NOPTS_VALUE : tsoffset, f->recording_time,
921 &last_filter, &pad_idx, name);
925 if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
931 static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
934 if (!ifilter->ist->dec) {
935 av_log(NULL, AV_LOG_ERROR,
936 "No decoder for stream #%d:%d, filtering impossible\n",
937 ifilter->ist->file_index, ifilter->ist->st->index);
938 return AVERROR_DECODER_NOT_FOUND;
940 switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
941 case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
942 case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
943 default: av_assert0(0);
947 static void cleanup_filtergraph(FilterGraph *fg)
950 for (i = 0; i < fg->nb_outputs; i++)
951 fg->outputs[i]->filter = (AVFilterContext *)NULL;
952 for (i = 0; i < fg->nb_inputs; i++)
953 fg->inputs[i]->filter = (AVFilterContext *)NULL;
954 avfilter_graph_free(&fg->graph);
957 int configure_filtergraph(FilterGraph *fg)
959 AVFilterInOut *inputs, *outputs, *cur;
960 int ret, i, simple = filtergraph_is_simple(fg);
961 const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
964 cleanup_filtergraph(fg);
965 if (!(fg->graph = avfilter_graph_alloc()))
966 return AVERROR(ENOMEM);
969 OutputStream *ost = fg->outputs[0]->ost;
971 AVDictionaryEntry *e = NULL;
973 fg->graph->nb_threads = filter_nbthreads;
976 while ((e = av_dict_get(ost->sws_dict, "", e,
977 AV_DICT_IGNORE_SUFFIX))) {
978 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
981 args[strlen(args)-1] = 0;
982 fg->graph->scale_sws_opts = av_strdup(args);
985 while ((e = av_dict_get(ost->swr_opts, "", e,
986 AV_DICT_IGNORE_SUFFIX))) {
987 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
990 args[strlen(args)-1] = 0;
991 av_opt_set(fg->graph, "aresample_swr_opts", args, 0);
994 while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e,
995 AV_DICT_IGNORE_SUFFIX))) {
996 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
999 args[strlen(args) - 1] = '\0';
1001 e = av_dict_get(ost->encoder_opts, "threads", NULL, 0);
1003 av_opt_set(fg->graph, "threads", e->value, 0);
1005 fg->graph->nb_threads = filter_complex_nbthreads;
1008 if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
1011 ret = hw_device_setup_for_filter(fg);
1015 if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
1016 const char *num_inputs;
1017 const char *num_outputs;
1020 } else if (outputs->next) {
1027 } else if (inputs->next) {
1032 av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' was expected "
1033 "to have exactly 1 input and 1 output."
1034 " However, it had %s input(s) and %s output(s)."
1035 " Please adjust, or use a complex filtergraph (-filter_complex) instead.\n",
1036 graph_desc, num_inputs, num_outputs);
1037 ret = AVERROR(EINVAL);
1041 for (cur = inputs, i = 0; cur; cur = cur->next, i++)
1042 if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0) {
1043 avfilter_inout_free(&inputs);
1044 avfilter_inout_free(&outputs);
1047 avfilter_inout_free(&inputs);
1049 for (cur = outputs, i = 0; cur; cur = cur->next, i++)
1050 configure_output_filter(fg, fg->outputs[i], cur);
1051 avfilter_inout_free(&outputs);
1053 if (!auto_conversion_filters)
1054 avfilter_graph_set_auto_convert(fg->graph, AVFILTER_AUTO_CONVERT_NONE);
1055 if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
1058 /* limit the lists of allowed formats to the ones selected, to
1059 * make sure they stay the same if the filtergraph is reconfigured later */
1060 for (i = 0; i < fg->nb_outputs; i++) {
1061 OutputFilter *ofilter = fg->outputs[i];
1062 AVFilterContext *sink = ofilter->filter;
1064 ofilter->format = av_buffersink_get_format(sink);
1066 ofilter->width = av_buffersink_get_w(sink);
1067 ofilter->height = av_buffersink_get_h(sink);
1069 ofilter->sample_rate = av_buffersink_get_sample_rate(sink);
1070 ofilter->channel_layout = av_buffersink_get_channel_layout(sink);
1073 fg->reconfiguration = 1;
1075 for (i = 0; i < fg->nb_outputs; i++) {
1076 OutputStream *ost = fg->outputs[i]->ost;
1078 /* identical to the same check in ffmpeg.c, needed because
1079 complex filter graphs are initialized earlier */
1080 av_log(NULL, AV_LOG_ERROR, "Encoder (codec %s) not found for output stream #%d:%d\n",
1081 avcodec_get_name(ost->st->codecpar->codec_id), ost->file_index, ost->index);
1082 ret = AVERROR(EINVAL);
1085 if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1086 !(ost->enc->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE))
1087 av_buffersink_set_frame_size(ost->filter->filter,
1088 ost->enc_ctx->frame_size);
1091 for (i = 0; i < fg->nb_inputs; i++) {
1092 while (av_fifo_size(fg->inputs[i]->frame_queue)) {
1094 av_fifo_generic_read(fg->inputs[i]->frame_queue, &tmp, sizeof(tmp), NULL);
1095 ret = av_buffersrc_add_frame(fg->inputs[i]->filter, tmp);
1096 av_frame_free(&tmp);
1102 /* send the EOFs for the finished inputs */
1103 for (i = 0; i < fg->nb_inputs; i++) {
1104 if (fg->inputs[i]->eof) {
1105 ret = av_buffersrc_add_frame(fg->inputs[i]->filter, NULL);
1111 /* process queued up subtitle packets */
1112 for (i = 0; i < fg->nb_inputs; i++) {
1113 InputStream *ist = fg->inputs[i]->ist;
1114 if (ist->sub2video.sub_queue && ist->sub2video.frame) {
1115 while (av_fifo_size(ist->sub2video.sub_queue)) {
1117 av_fifo_generic_read(ist->sub2video.sub_queue, &tmp, sizeof(tmp), NULL);
1118 sub2video_update(ist, INT64_MIN, &tmp);
1119 avsubtitle_free(&tmp);
1127 cleanup_filtergraph(fg);
1131 int ifilter_parameters_from_frame(InputFilter *ifilter, const AVFrame *frame)
1133 av_buffer_unref(&ifilter->hw_frames_ctx);
1135 ifilter->format = frame->format;
1137 ifilter->width = frame->width;
1138 ifilter->height = frame->height;
1139 ifilter->sample_aspect_ratio = frame->sample_aspect_ratio;
1141 ifilter->sample_rate = frame->sample_rate;
1142 ifilter->channels = frame->channels;
1143 ifilter->channel_layout = frame->channel_layout;
1145 if (frame->hw_frames_ctx) {
1146 ifilter->hw_frames_ctx = av_buffer_ref(frame->hw_frames_ctx);
1147 if (!ifilter->hw_frames_ctx)
1148 return AVERROR(ENOMEM);
1154 int filtergraph_is_simple(FilterGraph *fg)
1156 return !fg->graph_desc;