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 static enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodecContext *enc_ctx,
64 const AVCodec *codec, enum AVPixelFormat target)
66 if (codec && codec->pix_fmts) {
67 const enum AVPixelFormat *p = codec->pix_fmts;
68 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(target);
69 //FIXME: This should check for AV_PIX_FMT_FLAG_ALPHA after PAL8 pixel format without alpha is implemented
70 int has_alpha = desc ? desc->nb_components % 2 == 0 : 0;
71 enum AVPixelFormat best= AV_PIX_FMT_NONE;
73 if (enc_ctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
74 p = get_compliance_unofficial_pix_fmts(enc_ctx->codec_id, p);
76 for (; *p != AV_PIX_FMT_NONE; p++) {
77 best = av_find_best_pix_fmt_of_2(best, *p, target, has_alpha, NULL);
81 if (*p == AV_PIX_FMT_NONE) {
82 if (target != AV_PIX_FMT_NONE)
83 av_log(NULL, AV_LOG_WARNING,
84 "Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
85 av_get_pix_fmt_name(target),
87 av_get_pix_fmt_name(best));
94 static char *choose_pix_fmts(OutputFilter *ofilter)
96 OutputStream *ost = ofilter->ost;
97 AVDictionaryEntry *strict_dict = av_dict_get(ost->encoder_opts, "strict", NULL, 0);
99 // used by choose_pixel_fmt() and below
100 av_opt_set(ost->enc_ctx, "strict", strict_dict->value, 0);
102 if (ost->keep_pix_fmt) {
103 avfilter_graph_set_auto_convert(ofilter->graph->graph,
104 AVFILTER_AUTO_CONVERT_NONE);
105 if (ost->enc_ctx->pix_fmt == AV_PIX_FMT_NONE)
107 return av_strdup(av_get_pix_fmt_name(ost->enc_ctx->pix_fmt));
109 if (ost->enc_ctx->pix_fmt != AV_PIX_FMT_NONE) {
110 return av_strdup(av_get_pix_fmt_name(choose_pixel_fmt(ost->st, ost->enc_ctx, ost->enc, ost->enc_ctx->pix_fmt)));
111 } else if (ost->enc && ost->enc->pix_fmts) {
112 const enum AVPixelFormat *p;
113 AVIOContext *s = NULL;
117 if (avio_open_dyn_buf(&s) < 0)
120 p = ost->enc->pix_fmts;
121 if (ost->enc_ctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
122 p = get_compliance_unofficial_pix_fmts(ost->enc_ctx->codec_id, p);
125 for (; *p != AV_PIX_FMT_NONE; p++) {
126 const char *name = av_get_pix_fmt_name(*p);
127 avio_printf(s, "%s|", name);
129 len = avio_close_dyn_buf(s, &ret);
136 /* Define a function for building a string containing a list of
137 * allowed formats. */
138 #define DEF_CHOOSE_FORMAT(suffix, type, var, supported_list, none, get_name) \
139 static char *choose_ ## suffix (OutputFilter *ofilter) \
141 if (ofilter->var != none) { \
142 get_name(ofilter->var); \
143 return av_strdup(name); \
144 } else if (ofilter->supported_list) { \
146 AVIOContext *s = NULL; \
150 if (avio_open_dyn_buf(&s) < 0) \
153 for (p = ofilter->supported_list; *p != none; p++) { \
155 avio_printf(s, "%s|", name); \
157 len = avio_close_dyn_buf(s, &ret); \
164 //DEF_CHOOSE_FORMAT(pix_fmts, enum AVPixelFormat, format, formats, AV_PIX_FMT_NONE,
167 DEF_CHOOSE_FORMAT(sample_fmts, enum AVSampleFormat, format, formats,
168 AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME)
170 DEF_CHOOSE_FORMAT(sample_rates, int, sample_rate, sample_rates, 0,
171 GET_SAMPLE_RATE_NAME)
173 DEF_CHOOSE_FORMAT(channel_layouts, uint64_t, channel_layout, channel_layouts, 0,
176 int init_simple_filtergraph(InputStream *ist, OutputStream *ost)
178 FilterGraph *fg = av_mallocz(sizeof(*fg));
182 fg->index = nb_filtergraphs;
184 GROW_ARRAY(fg->outputs, fg->nb_outputs);
185 if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
187 fg->outputs[0]->ost = ost;
188 fg->outputs[0]->graph = fg;
189 fg->outputs[0]->format = -1;
191 ost->filter = fg->outputs[0];
193 GROW_ARRAY(fg->inputs, fg->nb_inputs);
194 if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
196 fg->inputs[0]->ist = ist;
197 fg->inputs[0]->graph = fg;
198 fg->inputs[0]->format = -1;
200 fg->inputs[0]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
201 if (!fg->inputs[0]->frame_queue)
204 GROW_ARRAY(ist->filters, ist->nb_filters);
205 ist->filters[ist->nb_filters - 1] = fg->inputs[0];
207 GROW_ARRAY(filtergraphs, nb_filtergraphs);
208 filtergraphs[nb_filtergraphs - 1] = fg;
213 static char *describe_filter_link(FilterGraph *fg, AVFilterInOut *inout, int in)
215 AVFilterContext *ctx = inout->filter_ctx;
216 AVFilterPad *pads = in ? ctx->input_pads : ctx->output_pads;
217 int nb_pads = in ? ctx->nb_inputs : ctx->nb_outputs;
221 if (avio_open_dyn_buf(&pb) < 0)
224 avio_printf(pb, "%s", ctx->filter->name);
226 avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));
228 avio_close_dyn_buf(pb, &res);
232 static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
234 InputStream *ist = NULL;
235 enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
238 // TODO: support other filter types
239 if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
240 av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
249 int file_idx = strtol(in->name, &p, 0);
251 if (file_idx < 0 || file_idx >= nb_input_files) {
252 av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtergraph description %s.\n",
253 file_idx, fg->graph_desc);
256 s = input_files[file_idx]->ctx;
258 for (i = 0; i < s->nb_streams; i++) {
259 enum AVMediaType stream_type = s->streams[i]->codecpar->codec_type;
260 if (stream_type != type &&
261 !(stream_type == AVMEDIA_TYPE_SUBTITLE &&
262 type == AVMEDIA_TYPE_VIDEO /* sub2video hack */))
264 if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
270 av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
271 "matches no streams.\n", p, fg->graph_desc);
274 ist = input_streams[input_files[file_idx]->ist_index + st->index];
275 if (ist->user_set_discard == AVDISCARD_ALL) {
276 av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
277 "matches a disabled input stream.\n", p, fg->graph_desc);
281 /* find the first unused stream of corresponding type */
282 for (i = 0; i < nb_input_streams; i++) {
283 ist = input_streams[i];
284 if (ist->user_set_discard == AVDISCARD_ALL)
286 if (ist->dec_ctx->codec_type == type && ist->discard)
289 if (i == nb_input_streams) {
290 av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
291 "unlabeled input pad %d on filter %s\n", in->pad_idx,
292 in->filter_ctx->name);
299 ist->decoding_needed |= DECODING_FOR_FILTER;
300 ist->st->discard = AVDISCARD_NONE;
302 GROW_ARRAY(fg->inputs, fg->nb_inputs);
303 if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
305 fg->inputs[fg->nb_inputs - 1]->ist = ist;
306 fg->inputs[fg->nb_inputs - 1]->graph = fg;
307 fg->inputs[fg->nb_inputs - 1]->format = -1;
308 fg->inputs[fg->nb_inputs - 1]->type = ist->st->codecpar->codec_type;
309 fg->inputs[fg->nb_inputs - 1]->name = describe_filter_link(fg, in, 1);
311 fg->inputs[fg->nb_inputs - 1]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
312 if (!fg->inputs[fg->nb_inputs - 1]->frame_queue)
315 GROW_ARRAY(ist->filters, ist->nb_filters);
316 ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
319 int init_complex_filtergraph(FilterGraph *fg)
321 AVFilterInOut *inputs, *outputs, *cur;
322 AVFilterGraph *graph;
325 /* this graph is only used for determining the kinds of inputs
326 * and outputs we have, and is discarded on exit from this function */
327 graph = avfilter_graph_alloc();
329 return AVERROR(ENOMEM);
330 graph->nb_threads = 1;
332 ret = avfilter_graph_parse2(graph, fg->graph_desc, &inputs, &outputs);
336 for (cur = inputs; cur; cur = cur->next)
337 init_input_filter(fg, cur);
339 for (cur = outputs; cur;) {
340 GROW_ARRAY(fg->outputs, fg->nb_outputs);
341 fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]));
342 if (!fg->outputs[fg->nb_outputs - 1])
345 fg->outputs[fg->nb_outputs - 1]->graph = fg;
346 fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
347 fg->outputs[fg->nb_outputs - 1]->type = avfilter_pad_get_type(cur->filter_ctx->output_pads,
349 fg->outputs[fg->nb_outputs - 1]->name = describe_filter_link(fg, cur, 0);
351 fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
355 avfilter_inout_free(&inputs);
356 avfilter_graph_free(&graph);
360 static int insert_trim(int64_t start_time, int64_t duration,
361 AVFilterContext **last_filter, int *pad_idx,
362 const char *filter_name)
364 AVFilterGraph *graph = (*last_filter)->graph;
365 AVFilterContext *ctx;
366 const AVFilter *trim;
367 enum AVMediaType type = avfilter_pad_get_type((*last_filter)->output_pads, *pad_idx);
368 const char *name = (type == AVMEDIA_TYPE_VIDEO) ? "trim" : "atrim";
371 if (duration == INT64_MAX && start_time == AV_NOPTS_VALUE)
374 trim = avfilter_get_by_name(name);
376 av_log(NULL, AV_LOG_ERROR, "%s filter not present, cannot limit "
377 "recording time.\n", name);
378 return AVERROR_FILTER_NOT_FOUND;
381 ctx = avfilter_graph_alloc_filter(graph, trim, filter_name);
383 return AVERROR(ENOMEM);
385 if (duration != INT64_MAX) {
386 ret = av_opt_set_int(ctx, "durationi", duration,
387 AV_OPT_SEARCH_CHILDREN);
389 if (ret >= 0 && start_time != AV_NOPTS_VALUE) {
390 ret = av_opt_set_int(ctx, "starti", start_time,
391 AV_OPT_SEARCH_CHILDREN);
394 av_log(ctx, AV_LOG_ERROR, "Error configuring the %s filter", name);
398 ret = avfilter_init_str(ctx, NULL);
402 ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
411 static int insert_filter(AVFilterContext **last_filter, int *pad_idx,
412 const char *filter_name, const char *args)
414 AVFilterGraph *graph = (*last_filter)->graph;
415 AVFilterContext *ctx;
418 ret = avfilter_graph_create_filter(&ctx,
419 avfilter_get_by_name(filter_name),
420 filter_name, args, NULL, graph);
424 ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
433 static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
436 OutputStream *ost = ofilter->ost;
437 OutputFile *of = output_files[ost->file_index];
438 AVFilterContext *last_filter = out->filter_ctx;
439 int pad_idx = out->pad_idx;
443 snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
444 ret = avfilter_graph_create_filter(&ofilter->filter,
445 avfilter_get_by_name("buffersink"),
446 name, NULL, NULL, fg->graph);
451 if ((ofilter->width || ofilter->height) && ofilter->ost->autoscale) {
453 AVFilterContext *filter;
454 AVDictionaryEntry *e = NULL;
456 snprintf(args, sizeof(args), "%d:%d",
457 ofilter->width, ofilter->height);
459 while ((e = av_dict_get(ost->sws_dict, "", e,
460 AV_DICT_IGNORE_SUFFIX))) {
461 av_strlcatf(args, sizeof(args), ":%s=%s", e->key, e->value);
464 snprintf(name, sizeof(name), "scaler_out_%d_%d",
465 ost->file_index, ost->index);
466 if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
467 name, args, NULL, fg->graph)) < 0)
469 if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
472 last_filter = filter;
476 if ((pix_fmts = choose_pix_fmts(ofilter))) {
477 AVFilterContext *filter;
478 snprintf(name, sizeof(name), "format_out_%d_%d",
479 ost->file_index, ost->index);
480 ret = avfilter_graph_create_filter(&filter,
481 avfilter_get_by_name("format"),
482 "format", pix_fmts, NULL, fg->graph);
486 if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
489 last_filter = filter;
493 if (ost->frame_rate.num && 0) {
494 AVFilterContext *fps;
497 snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
498 ost->frame_rate.den);
499 snprintf(name, sizeof(name), "fps_out_%d_%d",
500 ost->file_index, ost->index);
501 ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
502 name, args, NULL, fg->graph);
506 ret = avfilter_link(last_filter, pad_idx, fps, 0);
513 snprintf(name, sizeof(name), "trim_out_%d_%d",
514 ost->file_index, ost->index);
515 ret = insert_trim(of->start_time, of->recording_time,
516 &last_filter, &pad_idx, name);
521 if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
527 static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
529 OutputStream *ost = ofilter->ost;
530 OutputFile *of = output_files[ost->file_index];
531 AVCodecContext *codec = ost->enc_ctx;
532 AVFilterContext *last_filter = out->filter_ctx;
533 int pad_idx = out->pad_idx;
534 char *sample_fmts, *sample_rates, *channel_layouts;
538 snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
539 ret = avfilter_graph_create_filter(&ofilter->filter,
540 avfilter_get_by_name("abuffersink"),
541 name, NULL, NULL, fg->graph);
544 if ((ret = av_opt_set_int(ofilter->filter, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
547 #define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do { \
548 AVFilterContext *filt_ctx; \
550 av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
551 "similarly to -af " filter_name "=%s.\n", arg); \
553 ret = avfilter_graph_create_filter(&filt_ctx, \
554 avfilter_get_by_name(filter_name), \
555 filter_name, arg, NULL, fg->graph); \
559 ret = avfilter_link(last_filter, pad_idx, filt_ctx, 0); \
563 last_filter = filt_ctx; \
566 if (ost->audio_channels_mapped) {
569 av_bprint_init(&pan_buf, 256, 8192);
570 av_bprintf(&pan_buf, "0x%"PRIx64,
571 av_get_default_channel_layout(ost->audio_channels_mapped));
572 for (i = 0; i < ost->audio_channels_mapped; i++)
573 if (ost->audio_channels_map[i] != -1)
574 av_bprintf(&pan_buf, "|c%d=c%d", i, ost->audio_channels_map[i]);
576 AUTO_INSERT_FILTER("-map_channel", "pan", pan_buf.str);
577 av_bprint_finalize(&pan_buf, NULL);
580 if (codec->channels && !codec->channel_layout)
581 codec->channel_layout = av_get_default_channel_layout(codec->channels);
583 sample_fmts = choose_sample_fmts(ofilter);
584 sample_rates = choose_sample_rates(ofilter);
585 channel_layouts = choose_channel_layouts(ofilter);
586 if (sample_fmts || sample_rates || channel_layouts) {
587 AVFilterContext *format;
592 av_strlcatf(args, sizeof(args), "sample_fmts=%s:",
595 av_strlcatf(args, sizeof(args), "sample_rates=%s:",
598 av_strlcatf(args, sizeof(args), "channel_layouts=%s:",
601 av_freep(&sample_fmts);
602 av_freep(&sample_rates);
603 av_freep(&channel_layouts);
605 snprintf(name, sizeof(name), "format_out_%d_%d",
606 ost->file_index, ost->index);
607 ret = avfilter_graph_create_filter(&format,
608 avfilter_get_by_name("aformat"),
609 name, args, NULL, fg->graph);
613 ret = avfilter_link(last_filter, pad_idx, format, 0);
617 last_filter = format;
621 if (ost->apad && of->shortest) {
625 for (i=0; i<of->ctx->nb_streams; i++)
626 if (of->ctx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
629 if (i<of->ctx->nb_streams) {
630 snprintf(args, sizeof(args), "%s", ost->apad);
631 AUTO_INSERT_FILTER("-apad", "apad", args);
635 snprintf(name, sizeof(name), "trim for output stream %d:%d",
636 ost->file_index, ost->index);
637 ret = insert_trim(of->start_time, of->recording_time,
638 &last_filter, &pad_idx, name);
642 if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
648 static int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter,
652 av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", ofilter->name);
656 switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
657 case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
658 case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
659 default: av_assert0(0);
663 void check_filter_outputs(void)
666 for (i = 0; i < nb_filtergraphs; i++) {
668 for (n = 0; n < filtergraphs[i]->nb_outputs; n++) {
669 OutputFilter *output = filtergraphs[i]->outputs[n];
671 av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", output->name);
678 static int sub2video_prepare(InputStream *ist, InputFilter *ifilter)
680 AVFormatContext *avf = input_files[ist->file_index]->ctx;
683 /* Compute the size of the canvas for the subtitles stream.
684 If the subtitles codecpar has set a size, use it. Otherwise use the
685 maximum dimensions of the video streams in the same file. */
689 for (i = 0; i < avf->nb_streams; i++) {
690 if (avf->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
691 w = FFMAX(w, avf->streams[i]->codecpar->width);
692 h = FFMAX(h, avf->streams[i]->codecpar->height);
699 av_log(avf, AV_LOG_INFO, "sub2video: using %dx%d canvas\n", w, h);
701 ist->sub2video.w = ifilter->width = w;
702 ist->sub2video.h = ifilter->height = h;
704 ifilter->width = ist->dec_ctx->width ? ist->dec_ctx->width : ist->sub2video.w;
705 ifilter->height = ist->dec_ctx->height ? ist->dec_ctx->height : ist->sub2video.h;
707 /* rectangles are AV_PIX_FMT_PAL8, but we have no guarantee that the
708 palettes for all rectangles are identical or compatible */
709 ifilter->format = AV_PIX_FMT_RGB32;
711 ist->sub2video.frame = av_frame_alloc();
712 if (!ist->sub2video.frame)
713 return AVERROR(ENOMEM);
714 ist->sub2video.last_pts = INT64_MIN;
715 ist->sub2video.end_pts = INT64_MIN;
717 /* sub2video structure has been (re-)initialized.
718 Mark it as such so that the system will be
719 initialized with the first received heartbeat. */
720 ist->sub2video.initialize = 1;
725 static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
728 AVFilterContext *last_filter;
729 const AVFilter *buffer_filt = avfilter_get_by_name("buffer");
730 InputStream *ist = ifilter->ist;
731 InputFile *f = input_files[ist->file_index];
732 AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
734 AVRational fr = ist->framerate;
738 int ret, pad_idx = 0;
739 int64_t tsoffset = 0;
740 AVBufferSrcParameters *par = av_buffersrc_parameters_alloc();
743 return AVERROR(ENOMEM);
744 memset(par, 0, sizeof(*par));
745 par->format = AV_PIX_FMT_NONE;
747 if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
748 av_log(NULL, AV_LOG_ERROR, "Cannot connect video filter to audio input\n");
749 ret = AVERROR(EINVAL);
754 fr = av_guess_frame_rate(input_files[ist->file_index]->ctx, ist->st, NULL);
756 if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
757 ret = sub2video_prepare(ist, ifilter);
762 sar = ifilter->sample_aspect_ratio;
764 sar = (AVRational){0,1};
765 av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
767 "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:"
768 "pixel_aspect=%d/%d",
769 ifilter->width, ifilter->height, ifilter->format,
770 tb.num, tb.den, sar.num, sar.den);
771 if (fr.num && fr.den)
772 av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
773 snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
774 ist->file_index, ist->st->index);
777 if ((ret = avfilter_graph_create_filter(&ifilter->filter, buffer_filt, name,
778 args.str, NULL, fg->graph)) < 0)
780 par->hw_frames_ctx = ifilter->hw_frames_ctx;
781 ret = av_buffersrc_parameters_set(ifilter->filter, par);
785 last_filter = ifilter->filter;
787 if (ist->autorotate) {
788 double theta = get_rotation(ist->st);
790 if (fabs(theta - 90) < 1.0) {
791 ret = insert_filter(&last_filter, &pad_idx, "transpose", "clock");
792 } else if (fabs(theta - 180) < 1.0) {
793 ret = insert_filter(&last_filter, &pad_idx, "hflip", NULL);
796 ret = insert_filter(&last_filter, &pad_idx, "vflip", NULL);
797 } else if (fabs(theta - 270) < 1.0) {
798 ret = insert_filter(&last_filter, &pad_idx, "transpose", "cclock");
799 } else if (fabs(theta) > 1.0) {
801 snprintf(rotate_buf, sizeof(rotate_buf), "%f*PI/180", theta);
802 ret = insert_filter(&last_filter, &pad_idx, "rotate", rotate_buf);
808 if (do_deinterlace) {
809 AVFilterContext *yadif;
811 snprintf(name, sizeof(name), "deinterlace_in_%d_%d",
812 ist->file_index, ist->st->index);
813 if ((ret = avfilter_graph_create_filter(&yadif,
814 avfilter_get_by_name("yadif"),
819 if ((ret = avfilter_link(last_filter, 0, yadif, 0)) < 0)
825 snprintf(name, sizeof(name), "trim_in_%d_%d",
826 ist->file_index, ist->st->index);
828 tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
829 if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
830 tsoffset += f->ctx->start_time;
832 ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
833 AV_NOPTS_VALUE : tsoffset, f->recording_time,
834 &last_filter, &pad_idx, name);
838 if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
847 static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
850 AVFilterContext *last_filter;
851 const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer");
852 InputStream *ist = ifilter->ist;
853 InputFile *f = input_files[ist->file_index];
856 int ret, pad_idx = 0;
857 int64_t tsoffset = 0;
859 if (ist->dec_ctx->codec_type != AVMEDIA_TYPE_AUDIO) {
860 av_log(NULL, AV_LOG_ERROR, "Cannot connect audio filter to non audio input\n");
861 return AVERROR(EINVAL);
864 av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
865 av_bprintf(&args, "time_base=%d/%d:sample_rate=%d:sample_fmt=%s",
866 1, ifilter->sample_rate,
867 ifilter->sample_rate,
868 av_get_sample_fmt_name(ifilter->format));
869 if (ifilter->channel_layout)
870 av_bprintf(&args, ":channel_layout=0x%"PRIx64,
871 ifilter->channel_layout);
873 av_bprintf(&args, ":channels=%d", ifilter->channels);
874 snprintf(name, sizeof(name), "graph_%d_in_%d_%d", fg->index,
875 ist->file_index, ist->st->index);
877 if ((ret = avfilter_graph_create_filter(&ifilter->filter, abuffer_filt,
878 name, args.str, NULL,
881 last_filter = ifilter->filter;
883 #define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg) do { \
884 AVFilterContext *filt_ctx; \
886 av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
887 "similarly to -af " filter_name "=%s.\n", arg); \
889 snprintf(name, sizeof(name), "graph_%d_%s_in_%d_%d", \
890 fg->index, filter_name, ist->file_index, ist->st->index); \
891 ret = avfilter_graph_create_filter(&filt_ctx, \
892 avfilter_get_by_name(filter_name), \
893 name, arg, NULL, fg->graph); \
897 ret = avfilter_link(last_filter, 0, filt_ctx, 0); \
901 last_filter = filt_ctx; \
904 if (audio_sync_method > 0) {
905 char args[256] = {0};
907 av_strlcatf(args, sizeof(args), "async=%d", audio_sync_method);
908 if (audio_drift_threshold != 0.1)
909 av_strlcatf(args, sizeof(args), ":min_hard_comp=%f", audio_drift_threshold);
910 if (!fg->reconfiguration)
911 av_strlcatf(args, sizeof(args), ":first_pts=0");
912 AUTO_INSERT_FILTER_INPUT("-async", "aresample", args);
915 // if (ost->audio_channels_mapped) {
918 // av_bprint_init(&pan_buf, 256, 8192);
919 // av_bprintf(&pan_buf, "0x%"PRIx64,
920 // av_get_default_channel_layout(ost->audio_channels_mapped));
921 // for (i = 0; i < ost->audio_channels_mapped; i++)
922 // if (ost->audio_channels_map[i] != -1)
923 // av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
924 // AUTO_INSERT_FILTER_INPUT("-map_channel", "pan", pan_buf.str);
925 // av_bprint_finalize(&pan_buf, NULL);
928 if (audio_volume != 256) {
931 av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume "
932 "audio filter instead.\n");
934 snprintf(args, sizeof(args), "%f", audio_volume / 256.);
935 AUTO_INSERT_FILTER_INPUT("-vol", "volume", args);
938 snprintf(name, sizeof(name), "trim for input stream %d:%d",
939 ist->file_index, ist->st->index);
941 tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
942 if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
943 tsoffset += f->ctx->start_time;
945 ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
946 AV_NOPTS_VALUE : tsoffset, f->recording_time,
947 &last_filter, &pad_idx, name);
951 if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
957 static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
960 if (!ifilter->ist->dec) {
961 av_log(NULL, AV_LOG_ERROR,
962 "No decoder for stream #%d:%d, filtering impossible\n",
963 ifilter->ist->file_index, ifilter->ist->st->index);
964 return AVERROR_DECODER_NOT_FOUND;
966 switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
967 case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
968 case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
969 default: av_assert0(0);
973 static void cleanup_filtergraph(FilterGraph *fg)
976 for (i = 0; i < fg->nb_outputs; i++)
977 fg->outputs[i]->filter = (AVFilterContext *)NULL;
978 for (i = 0; i < fg->nb_inputs; i++)
979 fg->inputs[i]->filter = (AVFilterContext *)NULL;
980 avfilter_graph_free(&fg->graph);
983 int configure_filtergraph(FilterGraph *fg)
985 AVFilterInOut *inputs, *outputs, *cur;
986 int ret, i, simple = filtergraph_is_simple(fg);
987 const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
990 cleanup_filtergraph(fg);
991 if (!(fg->graph = avfilter_graph_alloc()))
992 return AVERROR(ENOMEM);
995 OutputStream *ost = fg->outputs[0]->ost;
997 AVDictionaryEntry *e = NULL;
999 fg->graph->nb_threads = filter_nbthreads;
1002 while ((e = av_dict_get(ost->sws_dict, "", e,
1003 AV_DICT_IGNORE_SUFFIX))) {
1004 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1007 args[strlen(args)-1] = 0;
1008 fg->graph->scale_sws_opts = av_strdup(args);
1011 while ((e = av_dict_get(ost->swr_opts, "", e,
1012 AV_DICT_IGNORE_SUFFIX))) {
1013 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1016 args[strlen(args)-1] = 0;
1017 av_opt_set(fg->graph, "aresample_swr_opts", args, 0);
1020 while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e,
1021 AV_DICT_IGNORE_SUFFIX))) {
1022 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1025 args[strlen(args) - 1] = '\0';
1027 e = av_dict_get(ost->encoder_opts, "threads", NULL, 0);
1029 av_opt_set(fg->graph, "threads", e->value, 0);
1031 fg->graph->nb_threads = filter_complex_nbthreads;
1034 if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
1037 ret = hw_device_setup_for_filter(fg);
1041 if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
1042 const char *num_inputs;
1043 const char *num_outputs;
1046 } else if (outputs->next) {
1053 } else if (inputs->next) {
1058 av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' was expected "
1059 "to have exactly 1 input and 1 output."
1060 " However, it had %s input(s) and %s output(s)."
1061 " Please adjust, or use a complex filtergraph (-filter_complex) instead.\n",
1062 graph_desc, num_inputs, num_outputs);
1063 ret = AVERROR(EINVAL);
1067 for (cur = inputs, i = 0; cur; cur = cur->next, i++)
1068 if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0) {
1069 avfilter_inout_free(&inputs);
1070 avfilter_inout_free(&outputs);
1073 avfilter_inout_free(&inputs);
1075 for (cur = outputs, i = 0; cur; cur = cur->next, i++)
1076 configure_output_filter(fg, fg->outputs[i], cur);
1077 avfilter_inout_free(&outputs);
1079 if (!auto_conversion_filters)
1080 avfilter_graph_set_auto_convert(fg->graph, AVFILTER_AUTO_CONVERT_NONE);
1081 if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
1084 /* limit the lists of allowed formats to the ones selected, to
1085 * make sure they stay the same if the filtergraph is reconfigured later */
1086 for (i = 0; i < fg->nb_outputs; i++) {
1087 OutputFilter *ofilter = fg->outputs[i];
1088 AVFilterContext *sink = ofilter->filter;
1090 ofilter->format = av_buffersink_get_format(sink);
1092 ofilter->width = av_buffersink_get_w(sink);
1093 ofilter->height = av_buffersink_get_h(sink);
1095 ofilter->sample_rate = av_buffersink_get_sample_rate(sink);
1096 ofilter->channel_layout = av_buffersink_get_channel_layout(sink);
1099 fg->reconfiguration = 1;
1101 for (i = 0; i < fg->nb_outputs; i++) {
1102 OutputStream *ost = fg->outputs[i]->ost;
1104 /* identical to the same check in ffmpeg.c, needed because
1105 complex filter graphs are initialized earlier */
1106 av_log(NULL, AV_LOG_ERROR, "Encoder (codec %s) not found for output stream #%d:%d\n",
1107 avcodec_get_name(ost->st->codecpar->codec_id), ost->file_index, ost->index);
1108 ret = AVERROR(EINVAL);
1111 if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1112 !(ost->enc->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE))
1113 av_buffersink_set_frame_size(ost->filter->filter,
1114 ost->enc_ctx->frame_size);
1117 for (i = 0; i < fg->nb_inputs; i++) {
1118 while (av_fifo_size(fg->inputs[i]->frame_queue)) {
1120 av_fifo_generic_read(fg->inputs[i]->frame_queue, &tmp, sizeof(tmp), NULL);
1121 ret = av_buffersrc_add_frame(fg->inputs[i]->filter, tmp);
1122 av_frame_free(&tmp);
1128 /* send the EOFs for the finished inputs */
1129 for (i = 0; i < fg->nb_inputs; i++) {
1130 if (fg->inputs[i]->eof) {
1131 ret = av_buffersrc_add_frame(fg->inputs[i]->filter, NULL);
1137 /* process queued up subtitle packets */
1138 for (i = 0; i < fg->nb_inputs; i++) {
1139 InputStream *ist = fg->inputs[i]->ist;
1140 if (ist->sub2video.sub_queue && ist->sub2video.frame) {
1141 while (av_fifo_size(ist->sub2video.sub_queue)) {
1143 av_fifo_generic_read(ist->sub2video.sub_queue, &tmp, sizeof(tmp), NULL);
1144 sub2video_update(ist, INT64_MIN, &tmp);
1145 avsubtitle_free(&tmp);
1153 cleanup_filtergraph(fg);
1157 int ifilter_parameters_from_frame(InputFilter *ifilter, const AVFrame *frame)
1159 av_buffer_unref(&ifilter->hw_frames_ctx);
1161 ifilter->format = frame->format;
1163 ifilter->width = frame->width;
1164 ifilter->height = frame->height;
1165 ifilter->sample_aspect_ratio = frame->sample_aspect_ratio;
1167 ifilter->sample_rate = frame->sample_rate;
1168 ifilter->channels = frame->channels;
1169 ifilter->channel_layout = frame->channel_layout;
1171 if (frame->hw_frames_ctx) {
1172 ifilter->hw_frames_ctx = av_buffer_ref(frame->hw_frames_ctx);
1173 if (!ifilter->hw_frames_ctx)
1174 return AVERROR(ENOMEM);
1180 int filtergraph_is_simple(FilterGraph *fg)
1182 return !fg->graph_desc;