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 static const enum AVPixelFormat *get_compliance_unofficial_pix_fmts(enum AVCodecID codec_id, 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,
46 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P,
48 static const enum AVPixelFormat ljpeg_formats[] =
49 { AV_PIX_FMT_BGR24 , AV_PIX_FMT_BGRA , AV_PIX_FMT_BGR0,
50 AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P,
51 AV_PIX_FMT_YUV420P , AV_PIX_FMT_YUV444P , AV_PIX_FMT_YUV422P,
54 if (codec_id == AV_CODEC_ID_MJPEG) {
56 } else if (codec_id == AV_CODEC_ID_LJPEG) {
59 return default_formats;
63 enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodecContext *enc_ctx, AVCodec *codec, enum AVPixelFormat target)
65 if (codec && codec->pix_fmts) {
66 const enum AVPixelFormat *p = codec->pix_fmts;
67 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(target);
68 int has_alpha = desc ? desc->nb_components % 2 == 0 : 0;
69 enum AVPixelFormat best= AV_PIX_FMT_NONE;
71 if (enc_ctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
72 p = get_compliance_unofficial_pix_fmts(enc_ctx->codec_id, p);
74 for (; *p != AV_PIX_FMT_NONE; p++) {
75 best= avcodec_find_best_pix_fmt_of_2(best, *p, target, has_alpha, NULL);
79 if (*p == AV_PIX_FMT_NONE) {
80 if (target != AV_PIX_FMT_NONE)
81 av_log(NULL, AV_LOG_WARNING,
82 "Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
83 av_get_pix_fmt_name(target),
85 av_get_pix_fmt_name(best));
92 void choose_sample_fmt(AVStream *st, AVCodec *codec)
94 if (codec && codec->sample_fmts) {
95 const enum AVSampleFormat *p = codec->sample_fmts;
96 for (; *p != -1; p++) {
97 if (*p == st->codecpar->format)
101 if((codec->capabilities & AV_CODEC_CAP_LOSSLESS) && av_get_sample_fmt_name(st->codecpar->format) > av_get_sample_fmt_name(codec->sample_fmts[0]))
102 av_log(NULL, AV_LOG_ERROR, "Conversion will not be lossless.\n");
103 if(av_get_sample_fmt_name(st->codecpar->format))
104 av_log(NULL, AV_LOG_WARNING,
105 "Incompatible sample format '%s' for codec '%s', auto-selecting format '%s'\n",
106 av_get_sample_fmt_name(st->codecpar->format),
108 av_get_sample_fmt_name(codec->sample_fmts[0]));
109 st->codecpar->format = codec->sample_fmts[0];
114 static char *choose_pix_fmts(OutputFilter *ofilter)
116 OutputStream *ost = ofilter->ost;
117 AVDictionaryEntry *strict_dict = av_dict_get(ost->encoder_opts, "strict", NULL, 0);
119 // used by choose_pixel_fmt() and below
120 av_opt_set(ost->enc_ctx, "strict", strict_dict->value, 0);
122 if (ost->keep_pix_fmt) {
123 avfilter_graph_set_auto_convert(ofilter->graph->graph,
124 AVFILTER_AUTO_CONVERT_NONE);
125 if (ost->enc_ctx->pix_fmt == AV_PIX_FMT_NONE)
127 return av_strdup(av_get_pix_fmt_name(ost->enc_ctx->pix_fmt));
129 if (ost->enc_ctx->pix_fmt != AV_PIX_FMT_NONE) {
130 return av_strdup(av_get_pix_fmt_name(choose_pixel_fmt(ost->st, ost->enc_ctx, ost->enc, ost->enc_ctx->pix_fmt)));
131 } else if (ost->enc && ost->enc->pix_fmts) {
132 const enum AVPixelFormat *p;
133 AVIOContext *s = NULL;
137 if (avio_open_dyn_buf(&s) < 0)
140 p = ost->enc->pix_fmts;
141 if (ost->enc_ctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
142 p = get_compliance_unofficial_pix_fmts(ost->enc_ctx->codec_id, p);
145 for (; *p != AV_PIX_FMT_NONE; p++) {
146 const char *name = av_get_pix_fmt_name(*p);
147 avio_printf(s, "%s|", name);
149 len = avio_close_dyn_buf(s, &ret);
156 /* Define a function for building a string containing a list of
157 * allowed formats. */
158 #define DEF_CHOOSE_FORMAT(suffix, type, var, supported_list, none, get_name) \
159 static char *choose_ ## suffix (OutputFilter *ofilter) \
161 if (ofilter->var != none) { \
162 get_name(ofilter->var); \
163 return av_strdup(name); \
164 } else if (ofilter->supported_list) { \
166 AVIOContext *s = NULL; \
170 if (avio_open_dyn_buf(&s) < 0) \
173 for (p = ofilter->supported_list; *p != none; p++) { \
175 avio_printf(s, "%s|", name); \
177 len = avio_close_dyn_buf(s, &ret); \
184 //DEF_CHOOSE_FORMAT(pix_fmts, enum AVPixelFormat, format, formats, AV_PIX_FMT_NONE,
187 DEF_CHOOSE_FORMAT(sample_fmts, enum AVSampleFormat, format, formats,
188 AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME)
190 DEF_CHOOSE_FORMAT(sample_rates, int, sample_rate, sample_rates, 0,
191 GET_SAMPLE_RATE_NAME)
193 DEF_CHOOSE_FORMAT(channel_layouts, uint64_t, channel_layout, channel_layouts, 0,
196 int init_simple_filtergraph(InputStream *ist, OutputStream *ost)
198 FilterGraph *fg = av_mallocz(sizeof(*fg));
202 fg->index = nb_filtergraphs;
204 GROW_ARRAY(fg->outputs, fg->nb_outputs);
205 if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
207 fg->outputs[0]->ost = ost;
208 fg->outputs[0]->graph = fg;
209 fg->outputs[0]->format = -1;
211 ost->filter = fg->outputs[0];
213 GROW_ARRAY(fg->inputs, fg->nb_inputs);
214 if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
216 fg->inputs[0]->ist = ist;
217 fg->inputs[0]->graph = fg;
218 fg->inputs[0]->format = -1;
220 fg->inputs[0]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
221 if (!fg->inputs[0]->frame_queue)
224 GROW_ARRAY(ist->filters, ist->nb_filters);
225 ist->filters[ist->nb_filters - 1] = fg->inputs[0];
227 GROW_ARRAY(filtergraphs, nb_filtergraphs);
228 filtergraphs[nb_filtergraphs - 1] = fg;
233 static char *describe_filter_link(FilterGraph *fg, AVFilterInOut *inout, int in)
235 AVFilterContext *ctx = inout->filter_ctx;
236 AVFilterPad *pads = in ? ctx->input_pads : ctx->output_pads;
237 int nb_pads = in ? ctx->nb_inputs : ctx->nb_outputs;
241 if (avio_open_dyn_buf(&pb) < 0)
244 avio_printf(pb, "%s", ctx->filter->name);
246 avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));
248 avio_close_dyn_buf(pb, &res);
252 static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
254 InputStream *ist = NULL;
255 enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
258 // TODO: support other filter types
259 if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
260 av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
269 int file_idx = strtol(in->name, &p, 0);
271 if (file_idx < 0 || file_idx >= nb_input_files) {
272 av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtergraph description %s.\n",
273 file_idx, fg->graph_desc);
276 s = input_files[file_idx]->ctx;
278 for (i = 0; i < s->nb_streams; i++) {
279 enum AVMediaType stream_type = s->streams[i]->codecpar->codec_type;
280 if (stream_type != type &&
281 !(stream_type == AVMEDIA_TYPE_SUBTITLE &&
282 type == AVMEDIA_TYPE_VIDEO /* sub2video hack */))
284 if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
290 av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
291 "matches no streams.\n", p, fg->graph_desc);
294 ist = input_streams[input_files[file_idx]->ist_index + st->index];
296 /* find the first unused stream of corresponding type */
297 for (i = 0; i < nb_input_streams; i++) {
298 ist = input_streams[i];
299 if (ist->dec_ctx->codec_type == type && ist->discard)
302 if (i == nb_input_streams) {
303 av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
304 "unlabeled input pad %d on filter %s\n", in->pad_idx,
305 in->filter_ctx->name);
312 ist->decoding_needed |= DECODING_FOR_FILTER;
313 ist->st->discard = AVDISCARD_NONE;
315 GROW_ARRAY(fg->inputs, fg->nb_inputs);
316 if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
318 fg->inputs[fg->nb_inputs - 1]->ist = ist;
319 fg->inputs[fg->nb_inputs - 1]->graph = fg;
320 fg->inputs[fg->nb_inputs - 1]->format = -1;
321 fg->inputs[fg->nb_inputs - 1]->type = ist->st->codecpar->codec_type;
322 fg->inputs[fg->nb_inputs - 1]->name = describe_filter_link(fg, in, 1);
324 fg->inputs[fg->nb_inputs - 1]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
325 if (!fg->inputs[fg->nb_inputs - 1]->frame_queue)
328 GROW_ARRAY(ist->filters, ist->nb_filters);
329 ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
332 int init_complex_filtergraph(FilterGraph *fg)
334 AVFilterInOut *inputs, *outputs, *cur;
335 AVFilterGraph *graph;
338 /* this graph is only used for determining the kinds of inputs
339 * and outputs we have, and is discarded on exit from this function */
340 graph = avfilter_graph_alloc();
342 return AVERROR(ENOMEM);
343 graph->nb_threads = 1;
345 ret = avfilter_graph_parse2(graph, fg->graph_desc, &inputs, &outputs);
349 for (cur = inputs; cur; cur = cur->next)
350 init_input_filter(fg, cur);
352 for (cur = outputs; cur;) {
353 GROW_ARRAY(fg->outputs, fg->nb_outputs);
354 fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]));
355 if (!fg->outputs[fg->nb_outputs - 1])
358 fg->outputs[fg->nb_outputs - 1]->graph = fg;
359 fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
360 fg->outputs[fg->nb_outputs - 1]->type = avfilter_pad_get_type(cur->filter_ctx->output_pads,
362 fg->outputs[fg->nb_outputs - 1]->name = describe_filter_link(fg, cur, 0);
364 fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
368 avfilter_inout_free(&inputs);
369 avfilter_graph_free(&graph);
373 static int insert_trim(int64_t start_time, int64_t duration,
374 AVFilterContext **last_filter, int *pad_idx,
375 const char *filter_name)
377 AVFilterGraph *graph = (*last_filter)->graph;
378 AVFilterContext *ctx;
379 const AVFilter *trim;
380 enum AVMediaType type = avfilter_pad_get_type((*last_filter)->output_pads, *pad_idx);
381 const char *name = (type == AVMEDIA_TYPE_VIDEO) ? "trim" : "atrim";
384 if (duration == INT64_MAX && start_time == AV_NOPTS_VALUE)
387 trim = avfilter_get_by_name(name);
389 av_log(NULL, AV_LOG_ERROR, "%s filter not present, cannot limit "
390 "recording time.\n", name);
391 return AVERROR_FILTER_NOT_FOUND;
394 ctx = avfilter_graph_alloc_filter(graph, trim, filter_name);
396 return AVERROR(ENOMEM);
398 if (duration != INT64_MAX) {
399 ret = av_opt_set_int(ctx, "durationi", duration,
400 AV_OPT_SEARCH_CHILDREN);
402 if (ret >= 0 && start_time != AV_NOPTS_VALUE) {
403 ret = av_opt_set_int(ctx, "starti", start_time,
404 AV_OPT_SEARCH_CHILDREN);
407 av_log(ctx, AV_LOG_ERROR, "Error configuring the %s filter", name);
411 ret = avfilter_init_str(ctx, NULL);
415 ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
424 static int insert_filter(AVFilterContext **last_filter, int *pad_idx,
425 const char *filter_name, const char *args)
427 AVFilterGraph *graph = (*last_filter)->graph;
428 AVFilterContext *ctx;
431 ret = avfilter_graph_create_filter(&ctx,
432 avfilter_get_by_name(filter_name),
433 filter_name, args, NULL, graph);
437 ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
446 static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
449 OutputStream *ost = ofilter->ost;
450 OutputFile *of = output_files[ost->file_index];
451 AVFilterContext *last_filter = out->filter_ctx;
452 int pad_idx = out->pad_idx;
456 snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
457 ret = avfilter_graph_create_filter(&ofilter->filter,
458 avfilter_get_by_name("buffersink"),
459 name, NULL, NULL, fg->graph);
464 if (ofilter->width || ofilter->height) {
466 AVFilterContext *filter;
467 AVDictionaryEntry *e = NULL;
469 snprintf(args, sizeof(args), "%d:%d",
470 ofilter->width, ofilter->height);
472 while ((e = av_dict_get(ost->sws_dict, "", e,
473 AV_DICT_IGNORE_SUFFIX))) {
474 av_strlcatf(args, sizeof(args), ":%s=%s", e->key, e->value);
477 snprintf(name, sizeof(name), "scaler_out_%d_%d",
478 ost->file_index, ost->index);
479 if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
480 name, args, NULL, fg->graph)) < 0)
482 if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
485 last_filter = filter;
489 if ((pix_fmts = choose_pix_fmts(ofilter))) {
490 AVFilterContext *filter;
491 snprintf(name, sizeof(name), "format_out_%d_%d",
492 ost->file_index, ost->index);
493 ret = avfilter_graph_create_filter(&filter,
494 avfilter_get_by_name("format"),
495 "format", pix_fmts, NULL, fg->graph);
499 if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
502 last_filter = filter;
506 if (ost->frame_rate.num && 0) {
507 AVFilterContext *fps;
510 snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
511 ost->frame_rate.den);
512 snprintf(name, sizeof(name), "fps_out_%d_%d",
513 ost->file_index, ost->index);
514 ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
515 name, args, NULL, fg->graph);
519 ret = avfilter_link(last_filter, pad_idx, fps, 0);
526 snprintf(name, sizeof(name), "trim_out_%d_%d",
527 ost->file_index, ost->index);
528 ret = insert_trim(of->start_time, of->recording_time,
529 &last_filter, &pad_idx, name);
534 if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
540 static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
542 OutputStream *ost = ofilter->ost;
543 OutputFile *of = output_files[ost->file_index];
544 AVCodecContext *codec = ost->enc_ctx;
545 AVFilterContext *last_filter = out->filter_ctx;
546 int pad_idx = out->pad_idx;
547 char *sample_fmts, *sample_rates, *channel_layouts;
551 snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
552 ret = avfilter_graph_create_filter(&ofilter->filter,
553 avfilter_get_by_name("abuffersink"),
554 name, NULL, NULL, fg->graph);
557 if ((ret = av_opt_set_int(ofilter->filter, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
560 #define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do { \
561 AVFilterContext *filt_ctx; \
563 av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
564 "similarly to -af " filter_name "=%s.\n", arg); \
566 ret = avfilter_graph_create_filter(&filt_ctx, \
567 avfilter_get_by_name(filter_name), \
568 filter_name, arg, NULL, fg->graph); \
572 ret = avfilter_link(last_filter, pad_idx, filt_ctx, 0); \
576 last_filter = filt_ctx; \
579 if (ost->audio_channels_mapped) {
582 av_bprint_init(&pan_buf, 256, 8192);
583 av_bprintf(&pan_buf, "0x%"PRIx64,
584 av_get_default_channel_layout(ost->audio_channels_mapped));
585 for (i = 0; i < ost->audio_channels_mapped; i++)
586 if (ost->audio_channels_map[i] != -1)
587 av_bprintf(&pan_buf, "|c%d=c%d", i, ost->audio_channels_map[i]);
589 AUTO_INSERT_FILTER("-map_channel", "pan", pan_buf.str);
590 av_bprint_finalize(&pan_buf, NULL);
593 if (codec->channels && !codec->channel_layout)
594 codec->channel_layout = av_get_default_channel_layout(codec->channels);
596 sample_fmts = choose_sample_fmts(ofilter);
597 sample_rates = choose_sample_rates(ofilter);
598 channel_layouts = choose_channel_layouts(ofilter);
599 if (sample_fmts || sample_rates || channel_layouts) {
600 AVFilterContext *format;
605 av_strlcatf(args, sizeof(args), "sample_fmts=%s:",
608 av_strlcatf(args, sizeof(args), "sample_rates=%s:",
611 av_strlcatf(args, sizeof(args), "channel_layouts=%s:",
614 av_freep(&sample_fmts);
615 av_freep(&sample_rates);
616 av_freep(&channel_layouts);
618 snprintf(name, sizeof(name), "format_out_%d_%d",
619 ost->file_index, ost->index);
620 ret = avfilter_graph_create_filter(&format,
621 avfilter_get_by_name("aformat"),
622 name, args, NULL, fg->graph);
626 ret = avfilter_link(last_filter, pad_idx, format, 0);
630 last_filter = format;
634 if (audio_volume != 256 && 0) {
637 snprintf(args, sizeof(args), "%f", audio_volume / 256.);
638 AUTO_INSERT_FILTER("-vol", "volume", args);
641 if (ost->apad && of->shortest) {
645 for (i=0; i<of->ctx->nb_streams; i++)
646 if (of->ctx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
649 if (i<of->ctx->nb_streams) {
650 snprintf(args, sizeof(args), "%s", ost->apad);
651 AUTO_INSERT_FILTER("-apad", "apad", args);
655 snprintf(name, sizeof(name), "trim for output stream %d:%d",
656 ost->file_index, ost->index);
657 ret = insert_trim(of->start_time, of->recording_time,
658 &last_filter, &pad_idx, name);
662 if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
668 int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
671 av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", ofilter->name);
675 switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
676 case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
677 case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
678 default: av_assert0(0);
682 void check_filter_outputs(void)
685 for (i = 0; i < nb_filtergraphs; i++) {
687 for (n = 0; n < filtergraphs[i]->nb_outputs; n++) {
688 OutputFilter *output = filtergraphs[i]->outputs[n];
690 av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", output->name);
697 static int sub2video_prepare(InputStream *ist, InputFilter *ifilter)
699 AVFormatContext *avf = input_files[ist->file_index]->ctx;
702 /* Compute the size of the canvas for the subtitles stream.
703 If the subtitles codecpar has set a size, use it. Otherwise use the
704 maximum dimensions of the video streams in the same file. */
708 for (i = 0; i < avf->nb_streams; i++) {
709 if (avf->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
710 w = FFMAX(w, avf->streams[i]->codecpar->width);
711 h = FFMAX(h, avf->streams[i]->codecpar->height);
718 av_log(avf, AV_LOG_INFO, "sub2video: using %dx%d canvas\n", w, h);
720 ist->sub2video.w = ifilter->width = w;
721 ist->sub2video.h = ifilter->height = h;
723 ifilter->width = ist->dec_ctx->width ? ist->dec_ctx->width : ist->sub2video.w;
724 ifilter->height = ist->dec_ctx->height ? ist->dec_ctx->height : ist->sub2video.h;
726 /* rectangles are AV_PIX_FMT_PAL8, but we have no guarantee that the
727 palettes for all rectangles are identical or compatible */
728 ifilter->format = AV_PIX_FMT_RGB32;
730 ist->sub2video.frame = av_frame_alloc();
731 if (!ist->sub2video.frame)
732 return AVERROR(ENOMEM);
733 ist->sub2video.last_pts = INT64_MIN;
737 static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
740 AVFilterContext *last_filter;
741 const AVFilter *buffer_filt = avfilter_get_by_name("buffer");
742 InputStream *ist = ifilter->ist;
743 InputFile *f = input_files[ist->file_index];
744 AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
746 AVRational fr = ist->framerate;
750 int ret, pad_idx = 0;
751 int64_t tsoffset = 0;
752 AVBufferSrcParameters *par = av_buffersrc_parameters_alloc();
755 return AVERROR(ENOMEM);
756 memset(par, 0, sizeof(*par));
757 par->format = AV_PIX_FMT_NONE;
759 if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
760 av_log(NULL, AV_LOG_ERROR, "Cannot connect video filter to audio input\n");
761 ret = AVERROR(EINVAL);
766 fr = av_guess_frame_rate(input_files[ist->file_index]->ctx, ist->st, NULL);
768 if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
769 ret = sub2video_prepare(ist, ifilter);
774 sar = ifilter->sample_aspect_ratio;
776 sar = (AVRational){0,1};
777 av_bprint_init(&args, 0, 1);
779 "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:"
780 "pixel_aspect=%d/%d:sws_param=flags=%d",
781 ifilter->width, ifilter->height, ifilter->format,
782 tb.num, tb.den, sar.num, sar.den,
783 SWS_BILINEAR + ((ist->dec_ctx->flags&AV_CODEC_FLAG_BITEXACT) ? SWS_BITEXACT:0));
784 if (fr.num && fr.den)
785 av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
786 snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
787 ist->file_index, ist->st->index);
790 if ((ret = avfilter_graph_create_filter(&ifilter->filter, buffer_filt, name,
791 args.str, NULL, fg->graph)) < 0)
793 par->hw_frames_ctx = ifilter->hw_frames_ctx;
794 ret = av_buffersrc_parameters_set(ifilter->filter, par);
798 last_filter = ifilter->filter;
800 if (ist->autorotate) {
801 double theta = get_rotation(ist->st);
803 if (fabs(theta - 90) < 1.0) {
804 ret = insert_filter(&last_filter, &pad_idx, "transpose", "clock");
805 } else if (fabs(theta - 180) < 1.0) {
806 ret = insert_filter(&last_filter, &pad_idx, "hflip", NULL);
809 ret = insert_filter(&last_filter, &pad_idx, "vflip", NULL);
810 } else if (fabs(theta - 270) < 1.0) {
811 ret = insert_filter(&last_filter, &pad_idx, "transpose", "cclock");
812 } else if (fabs(theta) > 1.0) {
814 snprintf(rotate_buf, sizeof(rotate_buf), "%f*PI/180", theta);
815 ret = insert_filter(&last_filter, &pad_idx, "rotate", rotate_buf);
821 if (do_deinterlace) {
822 AVFilterContext *yadif;
824 snprintf(name, sizeof(name), "deinterlace_in_%d_%d",
825 ist->file_index, ist->st->index);
826 if ((ret = avfilter_graph_create_filter(&yadif,
827 avfilter_get_by_name("yadif"),
832 if ((ret = avfilter_link(last_filter, 0, yadif, 0)) < 0)
838 snprintf(name, sizeof(name), "trim_in_%d_%d",
839 ist->file_index, ist->st->index);
841 tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
842 if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
843 tsoffset += f->ctx->start_time;
845 ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
846 AV_NOPTS_VALUE : tsoffset, f->recording_time,
847 &last_filter, &pad_idx, name);
851 if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
860 static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
863 AVFilterContext *last_filter;
864 const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer");
865 InputStream *ist = ifilter->ist;
866 InputFile *f = input_files[ist->file_index];
869 int ret, pad_idx = 0;
870 int64_t tsoffset = 0;
872 if (ist->dec_ctx->codec_type != AVMEDIA_TYPE_AUDIO) {
873 av_log(NULL, AV_LOG_ERROR, "Cannot connect audio filter to non audio input\n");
874 return AVERROR(EINVAL);
877 av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
878 av_bprintf(&args, "time_base=%d/%d:sample_rate=%d:sample_fmt=%s",
879 1, ifilter->sample_rate,
880 ifilter->sample_rate,
881 av_get_sample_fmt_name(ifilter->format));
882 if (ifilter->channel_layout)
883 av_bprintf(&args, ":channel_layout=0x%"PRIx64,
884 ifilter->channel_layout);
886 av_bprintf(&args, ":channels=%d", ifilter->channels);
887 snprintf(name, sizeof(name), "graph_%d_in_%d_%d", fg->index,
888 ist->file_index, ist->st->index);
890 if ((ret = avfilter_graph_create_filter(&ifilter->filter, abuffer_filt,
891 name, args.str, NULL,
894 last_filter = ifilter->filter;
896 #define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg) do { \
897 AVFilterContext *filt_ctx; \
899 av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
900 "similarly to -af " filter_name "=%s.\n", arg); \
902 snprintf(name, sizeof(name), "graph_%d_%s_in_%d_%d", \
903 fg->index, filter_name, ist->file_index, ist->st->index); \
904 ret = avfilter_graph_create_filter(&filt_ctx, \
905 avfilter_get_by_name(filter_name), \
906 name, arg, NULL, fg->graph); \
910 ret = avfilter_link(last_filter, 0, filt_ctx, 0); \
914 last_filter = filt_ctx; \
917 if (audio_sync_method > 0) {
918 char args[256] = {0};
920 av_strlcatf(args, sizeof(args), "async=%d", audio_sync_method);
921 if (audio_drift_threshold != 0.1)
922 av_strlcatf(args, sizeof(args), ":min_hard_comp=%f", audio_drift_threshold);
923 if (!fg->reconfiguration)
924 av_strlcatf(args, sizeof(args), ":first_pts=0");
925 AUTO_INSERT_FILTER_INPUT("-async", "aresample", args);
928 // if (ost->audio_channels_mapped) {
931 // av_bprint_init(&pan_buf, 256, 8192);
932 // av_bprintf(&pan_buf, "0x%"PRIx64,
933 // av_get_default_channel_layout(ost->audio_channels_mapped));
934 // for (i = 0; i < ost->audio_channels_mapped; i++)
935 // if (ost->audio_channels_map[i] != -1)
936 // av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
937 // AUTO_INSERT_FILTER_INPUT("-map_channel", "pan", pan_buf.str);
938 // av_bprint_finalize(&pan_buf, NULL);
941 if (audio_volume != 256) {
944 av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume "
945 "audio filter instead.\n");
947 snprintf(args, sizeof(args), "%f", audio_volume / 256.);
948 AUTO_INSERT_FILTER_INPUT("-vol", "volume", args);
951 snprintf(name, sizeof(name), "trim for input stream %d:%d",
952 ist->file_index, ist->st->index);
954 tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
955 if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
956 tsoffset += f->ctx->start_time;
958 ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
959 AV_NOPTS_VALUE : tsoffset, f->recording_time,
960 &last_filter, &pad_idx, name);
964 if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
970 static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
973 if (!ifilter->ist->dec) {
974 av_log(NULL, AV_LOG_ERROR,
975 "No decoder for stream #%d:%d, filtering impossible\n",
976 ifilter->ist->file_index, ifilter->ist->st->index);
977 return AVERROR_DECODER_NOT_FOUND;
979 switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
980 case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
981 case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
982 default: av_assert0(0);
986 static void cleanup_filtergraph(FilterGraph *fg)
989 for (i = 0; i < fg->nb_outputs; i++)
990 fg->outputs[i]->filter = (AVFilterContext *)NULL;
991 for (i = 0; i < fg->nb_inputs; i++)
992 fg->inputs[i]->filter = (AVFilterContext *)NULL;
993 avfilter_graph_free(&fg->graph);
996 int configure_filtergraph(FilterGraph *fg)
998 AVFilterInOut *inputs, *outputs, *cur;
999 int ret, i, simple = filtergraph_is_simple(fg);
1000 const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
1003 cleanup_filtergraph(fg);
1004 if (!(fg->graph = avfilter_graph_alloc()))
1005 return AVERROR(ENOMEM);
1008 OutputStream *ost = fg->outputs[0]->ost;
1010 AVDictionaryEntry *e = NULL;
1012 fg->graph->nb_threads = filter_nbthreads;
1015 while ((e = av_dict_get(ost->sws_dict, "", e,
1016 AV_DICT_IGNORE_SUFFIX))) {
1017 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1020 args[strlen(args)-1] = 0;
1021 fg->graph->scale_sws_opts = av_strdup(args);
1024 while ((e = av_dict_get(ost->swr_opts, "", e,
1025 AV_DICT_IGNORE_SUFFIX))) {
1026 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1029 args[strlen(args)-1] = 0;
1030 av_opt_set(fg->graph, "aresample_swr_opts", args, 0);
1033 while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e,
1034 AV_DICT_IGNORE_SUFFIX))) {
1035 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1038 args[strlen(args) - 1] = '\0';
1040 e = av_dict_get(ost->encoder_opts, "threads", NULL, 0);
1042 av_opt_set(fg->graph, "threads", e->value, 0);
1044 fg->graph->nb_threads = filter_complex_nbthreads;
1047 if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
1050 if (filter_hw_device || hw_device_ctx) {
1051 AVBufferRef *device = filter_hw_device ? filter_hw_device->device_ref
1053 for (i = 0; i < fg->graph->nb_filters; i++) {
1054 fg->graph->filters[i]->hw_device_ctx = av_buffer_ref(device);
1055 if (!fg->graph->filters[i]->hw_device_ctx) {
1056 ret = AVERROR(ENOMEM);
1062 if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
1063 const char *num_inputs;
1064 const char *num_outputs;
1067 } else if (outputs->next) {
1074 } else if (inputs->next) {
1079 av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' was expected "
1080 "to have exactly 1 input and 1 output."
1081 " However, it had %s input(s) and %s output(s)."
1082 " Please adjust, or use a complex filtergraph (-filter_complex) instead.\n",
1083 graph_desc, num_inputs, num_outputs);
1084 ret = AVERROR(EINVAL);
1088 for (cur = inputs, i = 0; cur; cur = cur->next, i++)
1089 if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0) {
1090 avfilter_inout_free(&inputs);
1091 avfilter_inout_free(&outputs);
1094 avfilter_inout_free(&inputs);
1096 for (cur = outputs, i = 0; cur; cur = cur->next, i++)
1097 configure_output_filter(fg, fg->outputs[i], cur);
1098 avfilter_inout_free(&outputs);
1100 if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
1103 /* limit the lists of allowed formats to the ones selected, to
1104 * make sure they stay the same if the filtergraph is reconfigured later */
1105 for (i = 0; i < fg->nb_outputs; i++) {
1106 OutputFilter *ofilter = fg->outputs[i];
1107 AVFilterContext *sink = ofilter->filter;
1109 ofilter->format = av_buffersink_get_format(sink);
1111 ofilter->width = av_buffersink_get_w(sink);
1112 ofilter->height = av_buffersink_get_h(sink);
1114 ofilter->sample_rate = av_buffersink_get_sample_rate(sink);
1115 ofilter->channel_layout = av_buffersink_get_channel_layout(sink);
1118 fg->reconfiguration = 1;
1120 for (i = 0; i < fg->nb_outputs; i++) {
1121 OutputStream *ost = fg->outputs[i]->ost;
1123 /* identical to the same check in ffmpeg.c, needed because
1124 complex filter graphs are initialized earlier */
1125 av_log(NULL, AV_LOG_ERROR, "Encoder (codec %s) not found for output stream #%d:%d\n",
1126 avcodec_get_name(ost->st->codecpar->codec_id), ost->file_index, ost->index);
1127 ret = AVERROR(EINVAL);
1130 if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1131 !(ost->enc->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE))
1132 av_buffersink_set_frame_size(ost->filter->filter,
1133 ost->enc_ctx->frame_size);
1136 for (i = 0; i < fg->nb_inputs; i++) {
1137 while (av_fifo_size(fg->inputs[i]->frame_queue)) {
1139 av_fifo_generic_read(fg->inputs[i]->frame_queue, &tmp, sizeof(tmp), NULL);
1140 ret = av_buffersrc_add_frame(fg->inputs[i]->filter, tmp);
1141 av_frame_free(&tmp);
1147 /* send the EOFs for the finished inputs */
1148 for (i = 0; i < fg->nb_inputs; i++) {
1149 if (fg->inputs[i]->eof) {
1150 ret = av_buffersrc_add_frame(fg->inputs[i]->filter, NULL);
1156 /* process queued up subtitle packets */
1157 for (i = 0; i < fg->nb_inputs; i++) {
1158 InputStream *ist = fg->inputs[i]->ist;
1159 if (ist->sub2video.sub_queue && ist->sub2video.frame) {
1160 while (av_fifo_size(ist->sub2video.sub_queue)) {
1162 av_fifo_generic_read(ist->sub2video.sub_queue, &tmp, sizeof(tmp), NULL);
1163 sub2video_update(ist, &tmp);
1164 avsubtitle_free(&tmp);
1172 cleanup_filtergraph(fg);
1176 int ifilter_parameters_from_frame(InputFilter *ifilter, const AVFrame *frame)
1178 av_buffer_unref(&ifilter->hw_frames_ctx);
1180 ifilter->format = frame->format;
1182 ifilter->width = frame->width;
1183 ifilter->height = frame->height;
1184 ifilter->sample_aspect_ratio = frame->sample_aspect_ratio;
1186 ifilter->sample_rate = frame->sample_rate;
1187 ifilter->channels = frame->channels;
1188 ifilter->channel_layout = frame->channel_layout;
1190 if (frame->hw_frames_ctx) {
1191 ifilter->hw_frames_ctx = av_buffer_ref(frame->hw_frames_ctx);
1192 if (!ifilter->hw_frames_ctx)
1193 return AVERROR(ENOMEM);
1199 int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
1202 for (i = 0; i < fg->nb_inputs; i++)
1203 if (fg->inputs[i]->ist == ist)
1208 int filtergraph_is_simple(FilterGraph *fg)
1210 return !fg->graph_desc;