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 //FIXME: This should check for AV_PIX_FMT_FLAG_ALPHA after PAL8 pixel format without alpha is implemented
69 int has_alpha = desc ? desc->nb_components % 2 == 0 : 0;
70 enum AVPixelFormat best= AV_PIX_FMT_NONE;
72 if (enc_ctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
73 p = get_compliance_unofficial_pix_fmts(enc_ctx->codec_id, p);
75 for (; *p != AV_PIX_FMT_NONE; p++) {
76 best= avcodec_find_best_pix_fmt_of_2(best, *p, target, has_alpha, NULL);
80 if (*p == AV_PIX_FMT_NONE) {
81 if (target != AV_PIX_FMT_NONE)
82 av_log(NULL, AV_LOG_WARNING,
83 "Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
84 av_get_pix_fmt_name(target),
86 av_get_pix_fmt_name(best));
93 void choose_sample_fmt(AVStream *st, AVCodec *codec)
95 if (codec && codec->sample_fmts) {
96 const enum AVSampleFormat *p = codec->sample_fmts;
97 for (; *p != -1; p++) {
98 if (*p == st->codecpar->format)
102 if((codec->capabilities & AV_CODEC_CAP_LOSSLESS) && av_get_sample_fmt_name(st->codecpar->format) > av_get_sample_fmt_name(codec->sample_fmts[0]))
103 av_log(NULL, AV_LOG_ERROR, "Conversion will not be lossless.\n");
104 if(av_get_sample_fmt_name(st->codecpar->format))
105 av_log(NULL, AV_LOG_WARNING,
106 "Incompatible sample format '%s' for codec '%s', auto-selecting format '%s'\n",
107 av_get_sample_fmt_name(st->codecpar->format),
109 av_get_sample_fmt_name(codec->sample_fmts[0]));
110 st->codecpar->format = codec->sample_fmts[0];
115 static char *choose_pix_fmts(OutputFilter *ofilter)
117 OutputStream *ost = ofilter->ost;
118 AVDictionaryEntry *strict_dict = av_dict_get(ost->encoder_opts, "strict", NULL, 0);
120 // used by choose_pixel_fmt() and below
121 av_opt_set(ost->enc_ctx, "strict", strict_dict->value, 0);
123 if (ost->keep_pix_fmt) {
124 avfilter_graph_set_auto_convert(ofilter->graph->graph,
125 AVFILTER_AUTO_CONVERT_NONE);
126 if (ost->enc_ctx->pix_fmt == AV_PIX_FMT_NONE)
128 return av_strdup(av_get_pix_fmt_name(ost->enc_ctx->pix_fmt));
130 if (ost->enc_ctx->pix_fmt != AV_PIX_FMT_NONE) {
131 return av_strdup(av_get_pix_fmt_name(choose_pixel_fmt(ost->st, ost->enc_ctx, ost->enc, ost->enc_ctx->pix_fmt)));
132 } else if (ost->enc && ost->enc->pix_fmts) {
133 const enum AVPixelFormat *p;
134 AVIOContext *s = NULL;
138 if (avio_open_dyn_buf(&s) < 0)
141 p = ost->enc->pix_fmts;
142 if (ost->enc_ctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
143 p = get_compliance_unofficial_pix_fmts(ost->enc_ctx->codec_id, p);
146 for (; *p != AV_PIX_FMT_NONE; p++) {
147 const char *name = av_get_pix_fmt_name(*p);
148 avio_printf(s, "%s|", name);
150 len = avio_close_dyn_buf(s, &ret);
157 /* Define a function for building a string containing a list of
158 * allowed formats. */
159 #define DEF_CHOOSE_FORMAT(suffix, type, var, supported_list, none, get_name) \
160 static char *choose_ ## suffix (OutputFilter *ofilter) \
162 if (ofilter->var != none) { \
163 get_name(ofilter->var); \
164 return av_strdup(name); \
165 } else if (ofilter->supported_list) { \
167 AVIOContext *s = NULL; \
171 if (avio_open_dyn_buf(&s) < 0) \
174 for (p = ofilter->supported_list; *p != none; p++) { \
176 avio_printf(s, "%s|", name); \
178 len = avio_close_dyn_buf(s, &ret); \
185 //DEF_CHOOSE_FORMAT(pix_fmts, enum AVPixelFormat, format, formats, AV_PIX_FMT_NONE,
188 DEF_CHOOSE_FORMAT(sample_fmts, enum AVSampleFormat, format, formats,
189 AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME)
191 DEF_CHOOSE_FORMAT(sample_rates, int, sample_rate, sample_rates, 0,
192 GET_SAMPLE_RATE_NAME)
194 DEF_CHOOSE_FORMAT(channel_layouts, uint64_t, channel_layout, channel_layouts, 0,
197 int init_simple_filtergraph(InputStream *ist, OutputStream *ost)
199 FilterGraph *fg = av_mallocz(sizeof(*fg));
203 fg->index = nb_filtergraphs;
205 GROW_ARRAY(fg->outputs, fg->nb_outputs);
206 if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
208 fg->outputs[0]->ost = ost;
209 fg->outputs[0]->graph = fg;
210 fg->outputs[0]->format = -1;
212 ost->filter = fg->outputs[0];
214 GROW_ARRAY(fg->inputs, fg->nb_inputs);
215 if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
217 fg->inputs[0]->ist = ist;
218 fg->inputs[0]->graph = fg;
219 fg->inputs[0]->format = -1;
221 fg->inputs[0]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
222 if (!fg->inputs[0]->frame_queue)
225 GROW_ARRAY(ist->filters, ist->nb_filters);
226 ist->filters[ist->nb_filters - 1] = fg->inputs[0];
228 GROW_ARRAY(filtergraphs, nb_filtergraphs);
229 filtergraphs[nb_filtergraphs - 1] = fg;
234 static char *describe_filter_link(FilterGraph *fg, AVFilterInOut *inout, int in)
236 AVFilterContext *ctx = inout->filter_ctx;
237 AVFilterPad *pads = in ? ctx->input_pads : ctx->output_pads;
238 int nb_pads = in ? ctx->nb_inputs : ctx->nb_outputs;
242 if (avio_open_dyn_buf(&pb) < 0)
245 avio_printf(pb, "%s", ctx->filter->name);
247 avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));
249 avio_close_dyn_buf(pb, &res);
253 static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
255 InputStream *ist = NULL;
256 enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
259 // TODO: support other filter types
260 if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
261 av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
270 int file_idx = strtol(in->name, &p, 0);
272 if (file_idx < 0 || file_idx >= nb_input_files) {
273 av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtergraph description %s.\n",
274 file_idx, fg->graph_desc);
277 s = input_files[file_idx]->ctx;
279 for (i = 0; i < s->nb_streams; i++) {
280 enum AVMediaType stream_type = s->streams[i]->codecpar->codec_type;
281 if (stream_type != type &&
282 !(stream_type == AVMEDIA_TYPE_SUBTITLE &&
283 type == AVMEDIA_TYPE_VIDEO /* sub2video hack */))
285 if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
291 av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
292 "matches no streams.\n", p, fg->graph_desc);
295 ist = input_streams[input_files[file_idx]->ist_index + st->index];
296 if (ist->user_set_discard == AVDISCARD_ALL) {
297 av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
298 "matches a disabled input stream.\n", p, fg->graph_desc);
302 /* find the first unused stream of corresponding type */
303 for (i = 0; i < nb_input_streams; i++) {
304 ist = input_streams[i];
305 if (ist->user_set_discard == AVDISCARD_ALL)
307 if (ist->dec_ctx->codec_type == type && ist->discard)
310 if (i == nb_input_streams) {
311 av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
312 "unlabeled input pad %d on filter %s\n", in->pad_idx,
313 in->filter_ctx->name);
320 ist->decoding_needed |= DECODING_FOR_FILTER;
321 ist->st->discard = AVDISCARD_NONE;
323 GROW_ARRAY(fg->inputs, fg->nb_inputs);
324 if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
326 fg->inputs[fg->nb_inputs - 1]->ist = ist;
327 fg->inputs[fg->nb_inputs - 1]->graph = fg;
328 fg->inputs[fg->nb_inputs - 1]->format = -1;
329 fg->inputs[fg->nb_inputs - 1]->type = ist->st->codecpar->codec_type;
330 fg->inputs[fg->nb_inputs - 1]->name = describe_filter_link(fg, in, 1);
332 fg->inputs[fg->nb_inputs - 1]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
333 if (!fg->inputs[fg->nb_inputs - 1]->frame_queue)
336 GROW_ARRAY(ist->filters, ist->nb_filters);
337 ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
340 int init_complex_filtergraph(FilterGraph *fg)
342 AVFilterInOut *inputs, *outputs, *cur;
343 AVFilterGraph *graph;
346 /* this graph is only used for determining the kinds of inputs
347 * and outputs we have, and is discarded on exit from this function */
348 graph = avfilter_graph_alloc();
350 return AVERROR(ENOMEM);
351 graph->nb_threads = 1;
353 ret = avfilter_graph_parse2(graph, fg->graph_desc, &inputs, &outputs);
357 for (cur = inputs; cur; cur = cur->next)
358 init_input_filter(fg, cur);
360 for (cur = outputs; cur;) {
361 GROW_ARRAY(fg->outputs, fg->nb_outputs);
362 fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]));
363 if (!fg->outputs[fg->nb_outputs - 1])
366 fg->outputs[fg->nb_outputs - 1]->graph = fg;
367 fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
368 fg->outputs[fg->nb_outputs - 1]->type = avfilter_pad_get_type(cur->filter_ctx->output_pads,
370 fg->outputs[fg->nb_outputs - 1]->name = describe_filter_link(fg, cur, 0);
372 fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
376 avfilter_inout_free(&inputs);
377 avfilter_graph_free(&graph);
381 static int insert_trim(int64_t start_time, int64_t duration,
382 AVFilterContext **last_filter, int *pad_idx,
383 const char *filter_name)
385 AVFilterGraph *graph = (*last_filter)->graph;
386 AVFilterContext *ctx;
387 const AVFilter *trim;
388 enum AVMediaType type = avfilter_pad_get_type((*last_filter)->output_pads, *pad_idx);
389 const char *name = (type == AVMEDIA_TYPE_VIDEO) ? "trim" : "atrim";
392 if (duration == INT64_MAX && start_time == AV_NOPTS_VALUE)
395 trim = avfilter_get_by_name(name);
397 av_log(NULL, AV_LOG_ERROR, "%s filter not present, cannot limit "
398 "recording time.\n", name);
399 return AVERROR_FILTER_NOT_FOUND;
402 ctx = avfilter_graph_alloc_filter(graph, trim, filter_name);
404 return AVERROR(ENOMEM);
406 if (duration != INT64_MAX) {
407 ret = av_opt_set_int(ctx, "durationi", duration,
408 AV_OPT_SEARCH_CHILDREN);
410 if (ret >= 0 && start_time != AV_NOPTS_VALUE) {
411 ret = av_opt_set_int(ctx, "starti", start_time,
412 AV_OPT_SEARCH_CHILDREN);
415 av_log(ctx, AV_LOG_ERROR, "Error configuring the %s filter", name);
419 ret = avfilter_init_str(ctx, NULL);
423 ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
432 static int insert_filter(AVFilterContext **last_filter, int *pad_idx,
433 const char *filter_name, const char *args)
435 AVFilterGraph *graph = (*last_filter)->graph;
436 AVFilterContext *ctx;
439 ret = avfilter_graph_create_filter(&ctx,
440 avfilter_get_by_name(filter_name),
441 filter_name, args, NULL, graph);
445 ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
454 static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
457 OutputStream *ost = ofilter->ost;
458 OutputFile *of = output_files[ost->file_index];
459 AVFilterContext *last_filter = out->filter_ctx;
460 int pad_idx = out->pad_idx;
464 snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
465 ret = avfilter_graph_create_filter(&ofilter->filter,
466 avfilter_get_by_name("buffersink"),
467 name, NULL, NULL, fg->graph);
472 if (ofilter->width || ofilter->height) {
474 AVFilterContext *filter;
475 AVDictionaryEntry *e = NULL;
477 snprintf(args, sizeof(args), "%d:%d",
478 ofilter->width, ofilter->height);
480 while ((e = av_dict_get(ost->sws_dict, "", e,
481 AV_DICT_IGNORE_SUFFIX))) {
482 av_strlcatf(args, sizeof(args), ":%s=%s", e->key, e->value);
485 snprintf(name, sizeof(name), "scaler_out_%d_%d",
486 ost->file_index, ost->index);
487 if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
488 name, args, NULL, fg->graph)) < 0)
490 if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
493 last_filter = filter;
497 if ((pix_fmts = choose_pix_fmts(ofilter))) {
498 AVFilterContext *filter;
499 snprintf(name, sizeof(name), "format_out_%d_%d",
500 ost->file_index, ost->index);
501 ret = avfilter_graph_create_filter(&filter,
502 avfilter_get_by_name("format"),
503 "format", pix_fmts, NULL, fg->graph);
507 if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
510 last_filter = filter;
514 if (ost->frame_rate.num && 0) {
515 AVFilterContext *fps;
518 snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
519 ost->frame_rate.den);
520 snprintf(name, sizeof(name), "fps_out_%d_%d",
521 ost->file_index, ost->index);
522 ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
523 name, args, NULL, fg->graph);
527 ret = avfilter_link(last_filter, pad_idx, fps, 0);
534 snprintf(name, sizeof(name), "trim_out_%d_%d",
535 ost->file_index, ost->index);
536 ret = insert_trim(of->start_time, of->recording_time,
537 &last_filter, &pad_idx, name);
542 if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
548 static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
550 OutputStream *ost = ofilter->ost;
551 OutputFile *of = output_files[ost->file_index];
552 AVCodecContext *codec = ost->enc_ctx;
553 AVFilterContext *last_filter = out->filter_ctx;
554 int pad_idx = out->pad_idx;
555 char *sample_fmts, *sample_rates, *channel_layouts;
559 snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
560 ret = avfilter_graph_create_filter(&ofilter->filter,
561 avfilter_get_by_name("abuffersink"),
562 name, NULL, NULL, fg->graph);
565 if ((ret = av_opt_set_int(ofilter->filter, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
568 #define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do { \
569 AVFilterContext *filt_ctx; \
571 av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
572 "similarly to -af " filter_name "=%s.\n", arg); \
574 ret = avfilter_graph_create_filter(&filt_ctx, \
575 avfilter_get_by_name(filter_name), \
576 filter_name, arg, NULL, fg->graph); \
580 ret = avfilter_link(last_filter, pad_idx, filt_ctx, 0); \
584 last_filter = filt_ctx; \
587 if (ost->audio_channels_mapped) {
590 av_bprint_init(&pan_buf, 256, 8192);
591 av_bprintf(&pan_buf, "0x%"PRIx64,
592 av_get_default_channel_layout(ost->audio_channels_mapped));
593 for (i = 0; i < ost->audio_channels_mapped; i++)
594 if (ost->audio_channels_map[i] != -1)
595 av_bprintf(&pan_buf, "|c%d=c%d", i, ost->audio_channels_map[i]);
597 AUTO_INSERT_FILTER("-map_channel", "pan", pan_buf.str);
598 av_bprint_finalize(&pan_buf, NULL);
601 if (codec->channels && !codec->channel_layout)
602 codec->channel_layout = av_get_default_channel_layout(codec->channels);
604 sample_fmts = choose_sample_fmts(ofilter);
605 sample_rates = choose_sample_rates(ofilter);
606 channel_layouts = choose_channel_layouts(ofilter);
607 if (sample_fmts || sample_rates || channel_layouts) {
608 AVFilterContext *format;
613 av_strlcatf(args, sizeof(args), "sample_fmts=%s:",
616 av_strlcatf(args, sizeof(args), "sample_rates=%s:",
619 av_strlcatf(args, sizeof(args), "channel_layouts=%s:",
622 av_freep(&sample_fmts);
623 av_freep(&sample_rates);
624 av_freep(&channel_layouts);
626 snprintf(name, sizeof(name), "format_out_%d_%d",
627 ost->file_index, ost->index);
628 ret = avfilter_graph_create_filter(&format,
629 avfilter_get_by_name("aformat"),
630 name, args, NULL, fg->graph);
634 ret = avfilter_link(last_filter, pad_idx, format, 0);
638 last_filter = format;
642 if (audio_volume != 256 && 0) {
645 snprintf(args, sizeof(args), "%f", audio_volume / 256.);
646 AUTO_INSERT_FILTER("-vol", "volume", args);
649 if (ost->apad && of->shortest) {
653 for (i=0; i<of->ctx->nb_streams; i++)
654 if (of->ctx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
657 if (i<of->ctx->nb_streams) {
658 snprintf(args, sizeof(args), "%s", ost->apad);
659 AUTO_INSERT_FILTER("-apad", "apad", args);
663 snprintf(name, sizeof(name), "trim for output stream %d:%d",
664 ost->file_index, ost->index);
665 ret = insert_trim(of->start_time, of->recording_time,
666 &last_filter, &pad_idx, name);
670 if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
676 int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
679 av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", ofilter->name);
683 switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
684 case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
685 case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
686 default: av_assert0(0);
690 void check_filter_outputs(void)
693 for (i = 0; i < nb_filtergraphs; i++) {
695 for (n = 0; n < filtergraphs[i]->nb_outputs; n++) {
696 OutputFilter *output = filtergraphs[i]->outputs[n];
698 av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", output->name);
705 static int sub2video_prepare(InputStream *ist, InputFilter *ifilter)
707 AVFormatContext *avf = input_files[ist->file_index]->ctx;
710 /* Compute the size of the canvas for the subtitles stream.
711 If the subtitles codecpar has set a size, use it. Otherwise use the
712 maximum dimensions of the video streams in the same file. */
716 for (i = 0; i < avf->nb_streams; i++) {
717 if (avf->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
718 w = FFMAX(w, avf->streams[i]->codecpar->width);
719 h = FFMAX(h, avf->streams[i]->codecpar->height);
726 av_log(avf, AV_LOG_INFO, "sub2video: using %dx%d canvas\n", w, h);
728 ist->sub2video.w = ifilter->width = w;
729 ist->sub2video.h = ifilter->height = h;
731 ifilter->width = ist->dec_ctx->width ? ist->dec_ctx->width : ist->sub2video.w;
732 ifilter->height = ist->dec_ctx->height ? ist->dec_ctx->height : ist->sub2video.h;
734 /* rectangles are AV_PIX_FMT_PAL8, but we have no guarantee that the
735 palettes for all rectangles are identical or compatible */
736 ifilter->format = AV_PIX_FMT_RGB32;
738 ist->sub2video.frame = av_frame_alloc();
739 if (!ist->sub2video.frame)
740 return AVERROR(ENOMEM);
741 ist->sub2video.last_pts = INT64_MIN;
742 ist->sub2video.end_pts = INT64_MIN;
746 static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
749 AVFilterContext *last_filter;
750 const AVFilter *buffer_filt = avfilter_get_by_name("buffer");
751 InputStream *ist = ifilter->ist;
752 InputFile *f = input_files[ist->file_index];
753 AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
755 AVRational fr = ist->framerate;
759 int ret, pad_idx = 0;
760 int64_t tsoffset = 0;
761 AVBufferSrcParameters *par = av_buffersrc_parameters_alloc();
764 return AVERROR(ENOMEM);
765 memset(par, 0, sizeof(*par));
766 par->format = AV_PIX_FMT_NONE;
768 if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
769 av_log(NULL, AV_LOG_ERROR, "Cannot connect video filter to audio input\n");
770 ret = AVERROR(EINVAL);
775 fr = av_guess_frame_rate(input_files[ist->file_index]->ctx, ist->st, NULL);
777 if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
778 ret = sub2video_prepare(ist, ifilter);
783 sar = ifilter->sample_aspect_ratio;
785 sar = (AVRational){0,1};
786 av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
788 "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:"
789 "pixel_aspect=%d/%d:sws_param=flags=%d",
790 ifilter->width, ifilter->height, ifilter->format,
791 tb.num, tb.den, sar.num, sar.den,
792 SWS_BILINEAR + ((ist->dec_ctx->flags&AV_CODEC_FLAG_BITEXACT) ? SWS_BITEXACT:0));
793 if (fr.num && fr.den)
794 av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
795 snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
796 ist->file_index, ist->st->index);
799 if ((ret = avfilter_graph_create_filter(&ifilter->filter, buffer_filt, name,
800 args.str, NULL, fg->graph)) < 0)
802 par->hw_frames_ctx = ifilter->hw_frames_ctx;
803 ret = av_buffersrc_parameters_set(ifilter->filter, par);
807 last_filter = ifilter->filter;
809 if (ist->autorotate) {
810 double theta = get_rotation(ist->st);
812 if (fabs(theta - 90) < 1.0) {
813 ret = insert_filter(&last_filter, &pad_idx, "transpose", "clock");
814 } else if (fabs(theta - 180) < 1.0) {
815 ret = insert_filter(&last_filter, &pad_idx, "hflip", NULL);
818 ret = insert_filter(&last_filter, &pad_idx, "vflip", NULL);
819 } else if (fabs(theta - 270) < 1.0) {
820 ret = insert_filter(&last_filter, &pad_idx, "transpose", "cclock");
821 } else if (fabs(theta) > 1.0) {
823 snprintf(rotate_buf, sizeof(rotate_buf), "%f*PI/180", theta);
824 ret = insert_filter(&last_filter, &pad_idx, "rotate", rotate_buf);
830 if (do_deinterlace) {
831 AVFilterContext *yadif;
833 snprintf(name, sizeof(name), "deinterlace_in_%d_%d",
834 ist->file_index, ist->st->index);
835 if ((ret = avfilter_graph_create_filter(&yadif,
836 avfilter_get_by_name("yadif"),
841 if ((ret = avfilter_link(last_filter, 0, yadif, 0)) < 0)
847 snprintf(name, sizeof(name), "trim_in_%d_%d",
848 ist->file_index, ist->st->index);
850 tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
851 if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
852 tsoffset += f->ctx->start_time;
854 ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
855 AV_NOPTS_VALUE : tsoffset, f->recording_time,
856 &last_filter, &pad_idx, name);
860 if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
869 static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
872 AVFilterContext *last_filter;
873 const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer");
874 InputStream *ist = ifilter->ist;
875 InputFile *f = input_files[ist->file_index];
878 int ret, pad_idx = 0;
879 int64_t tsoffset = 0;
881 if (ist->dec_ctx->codec_type != AVMEDIA_TYPE_AUDIO) {
882 av_log(NULL, AV_LOG_ERROR, "Cannot connect audio filter to non audio input\n");
883 return AVERROR(EINVAL);
886 av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
887 av_bprintf(&args, "time_base=%d/%d:sample_rate=%d:sample_fmt=%s",
888 1, ifilter->sample_rate,
889 ifilter->sample_rate,
890 av_get_sample_fmt_name(ifilter->format));
891 if (ifilter->channel_layout)
892 av_bprintf(&args, ":channel_layout=0x%"PRIx64,
893 ifilter->channel_layout);
895 av_bprintf(&args, ":channels=%d", ifilter->channels);
896 snprintf(name, sizeof(name), "graph_%d_in_%d_%d", fg->index,
897 ist->file_index, ist->st->index);
899 if ((ret = avfilter_graph_create_filter(&ifilter->filter, abuffer_filt,
900 name, args.str, NULL,
903 last_filter = ifilter->filter;
905 #define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg) do { \
906 AVFilterContext *filt_ctx; \
908 av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
909 "similarly to -af " filter_name "=%s.\n", arg); \
911 snprintf(name, sizeof(name), "graph_%d_%s_in_%d_%d", \
912 fg->index, filter_name, ist->file_index, ist->st->index); \
913 ret = avfilter_graph_create_filter(&filt_ctx, \
914 avfilter_get_by_name(filter_name), \
915 name, arg, NULL, fg->graph); \
919 ret = avfilter_link(last_filter, 0, filt_ctx, 0); \
923 last_filter = filt_ctx; \
926 if (audio_sync_method > 0) {
927 char args[256] = {0};
929 av_strlcatf(args, sizeof(args), "async=%d", audio_sync_method);
930 if (audio_drift_threshold != 0.1)
931 av_strlcatf(args, sizeof(args), ":min_hard_comp=%f", audio_drift_threshold);
932 if (!fg->reconfiguration)
933 av_strlcatf(args, sizeof(args), ":first_pts=0");
934 AUTO_INSERT_FILTER_INPUT("-async", "aresample", args);
937 // if (ost->audio_channels_mapped) {
940 // av_bprint_init(&pan_buf, 256, 8192);
941 // av_bprintf(&pan_buf, "0x%"PRIx64,
942 // av_get_default_channel_layout(ost->audio_channels_mapped));
943 // for (i = 0; i < ost->audio_channels_mapped; i++)
944 // if (ost->audio_channels_map[i] != -1)
945 // av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
946 // AUTO_INSERT_FILTER_INPUT("-map_channel", "pan", pan_buf.str);
947 // av_bprint_finalize(&pan_buf, NULL);
950 if (audio_volume != 256) {
953 av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume "
954 "audio filter instead.\n");
956 snprintf(args, sizeof(args), "%f", audio_volume / 256.);
957 AUTO_INSERT_FILTER_INPUT("-vol", "volume", args);
960 snprintf(name, sizeof(name), "trim for input stream %d:%d",
961 ist->file_index, ist->st->index);
963 tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
964 if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
965 tsoffset += f->ctx->start_time;
967 ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
968 AV_NOPTS_VALUE : tsoffset, f->recording_time,
969 &last_filter, &pad_idx, name);
973 if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
979 static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
982 if (!ifilter->ist->dec) {
983 av_log(NULL, AV_LOG_ERROR,
984 "No decoder for stream #%d:%d, filtering impossible\n",
985 ifilter->ist->file_index, ifilter->ist->st->index);
986 return AVERROR_DECODER_NOT_FOUND;
988 switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
989 case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
990 case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
991 default: av_assert0(0);
995 static void cleanup_filtergraph(FilterGraph *fg)
998 for (i = 0; i < fg->nb_outputs; i++)
999 fg->outputs[i]->filter = (AVFilterContext *)NULL;
1000 for (i = 0; i < fg->nb_inputs; i++)
1001 fg->inputs[i]->filter = (AVFilterContext *)NULL;
1002 avfilter_graph_free(&fg->graph);
1005 int configure_filtergraph(FilterGraph *fg)
1007 AVFilterInOut *inputs, *outputs, *cur;
1008 int ret, i, simple = filtergraph_is_simple(fg);
1009 const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
1012 cleanup_filtergraph(fg);
1013 if (!(fg->graph = avfilter_graph_alloc()))
1014 return AVERROR(ENOMEM);
1017 OutputStream *ost = fg->outputs[0]->ost;
1019 AVDictionaryEntry *e = NULL;
1021 fg->graph->nb_threads = filter_nbthreads;
1024 while ((e = av_dict_get(ost->sws_dict, "", 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 fg->graph->scale_sws_opts = av_strdup(args);
1033 while ((e = av_dict_get(ost->swr_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;
1039 av_opt_set(fg->graph, "aresample_swr_opts", args, 0);
1042 while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e,
1043 AV_DICT_IGNORE_SUFFIX))) {
1044 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1047 args[strlen(args) - 1] = '\0';
1049 e = av_dict_get(ost->encoder_opts, "threads", NULL, 0);
1051 av_opt_set(fg->graph, "threads", e->value, 0);
1053 fg->graph->nb_threads = filter_complex_nbthreads;
1056 if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
1059 if (filter_hw_device || hw_device_ctx) {
1060 AVBufferRef *device = filter_hw_device ? filter_hw_device->device_ref
1062 for (i = 0; i < fg->graph->nb_filters; i++) {
1063 fg->graph->filters[i]->hw_device_ctx = av_buffer_ref(device);
1064 if (!fg->graph->filters[i]->hw_device_ctx) {
1065 ret = AVERROR(ENOMEM);
1071 if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
1072 const char *num_inputs;
1073 const char *num_outputs;
1076 } else if (outputs->next) {
1083 } else if (inputs->next) {
1088 av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' was expected "
1089 "to have exactly 1 input and 1 output."
1090 " However, it had %s input(s) and %s output(s)."
1091 " Please adjust, or use a complex filtergraph (-filter_complex) instead.\n",
1092 graph_desc, num_inputs, num_outputs);
1093 ret = AVERROR(EINVAL);
1097 for (cur = inputs, i = 0; cur; cur = cur->next, i++)
1098 if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0) {
1099 avfilter_inout_free(&inputs);
1100 avfilter_inout_free(&outputs);
1103 avfilter_inout_free(&inputs);
1105 for (cur = outputs, i = 0; cur; cur = cur->next, i++)
1106 configure_output_filter(fg, fg->outputs[i], cur);
1107 avfilter_inout_free(&outputs);
1109 if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
1112 /* limit the lists of allowed formats to the ones selected, to
1113 * make sure they stay the same if the filtergraph is reconfigured later */
1114 for (i = 0; i < fg->nb_outputs; i++) {
1115 OutputFilter *ofilter = fg->outputs[i];
1116 AVFilterContext *sink = ofilter->filter;
1118 ofilter->format = av_buffersink_get_format(sink);
1120 ofilter->width = av_buffersink_get_w(sink);
1121 ofilter->height = av_buffersink_get_h(sink);
1123 ofilter->sample_rate = av_buffersink_get_sample_rate(sink);
1124 ofilter->channel_layout = av_buffersink_get_channel_layout(sink);
1127 fg->reconfiguration = 1;
1129 for (i = 0; i < fg->nb_outputs; i++) {
1130 OutputStream *ost = fg->outputs[i]->ost;
1132 /* identical to the same check in ffmpeg.c, needed because
1133 complex filter graphs are initialized earlier */
1134 av_log(NULL, AV_LOG_ERROR, "Encoder (codec %s) not found for output stream #%d:%d\n",
1135 avcodec_get_name(ost->st->codecpar->codec_id), ost->file_index, ost->index);
1136 ret = AVERROR(EINVAL);
1139 if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1140 !(ost->enc->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE))
1141 av_buffersink_set_frame_size(ost->filter->filter,
1142 ost->enc_ctx->frame_size);
1145 for (i = 0; i < fg->nb_inputs; i++) {
1146 while (av_fifo_size(fg->inputs[i]->frame_queue)) {
1148 av_fifo_generic_read(fg->inputs[i]->frame_queue, &tmp, sizeof(tmp), NULL);
1149 ret = av_buffersrc_add_frame(fg->inputs[i]->filter, tmp);
1150 av_frame_free(&tmp);
1156 /* send the EOFs for the finished inputs */
1157 for (i = 0; i < fg->nb_inputs; i++) {
1158 if (fg->inputs[i]->eof) {
1159 ret = av_buffersrc_add_frame(fg->inputs[i]->filter, NULL);
1165 /* process queued up subtitle packets */
1166 for (i = 0; i < fg->nb_inputs; i++) {
1167 InputStream *ist = fg->inputs[i]->ist;
1168 if (ist->sub2video.sub_queue && ist->sub2video.frame) {
1169 while (av_fifo_size(ist->sub2video.sub_queue)) {
1171 av_fifo_generic_read(ist->sub2video.sub_queue, &tmp, sizeof(tmp), NULL);
1172 sub2video_update(ist, &tmp);
1173 avsubtitle_free(&tmp);
1181 cleanup_filtergraph(fg);
1185 int ifilter_parameters_from_frame(InputFilter *ifilter, const AVFrame *frame)
1187 av_buffer_unref(&ifilter->hw_frames_ctx);
1189 ifilter->format = frame->format;
1191 ifilter->width = frame->width;
1192 ifilter->height = frame->height;
1193 ifilter->sample_aspect_ratio = frame->sample_aspect_ratio;
1195 ifilter->sample_rate = frame->sample_rate;
1196 ifilter->channels = frame->channels;
1197 ifilter->channel_layout = frame->channel_layout;
1199 if (frame->hw_frames_ctx) {
1200 ifilter->hw_frames_ctx = av_buffer_ref(frame->hw_frames_ctx);
1201 if (!ifilter->hw_frames_ctx)
1202 return AVERROR(ENOMEM);
1208 int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
1211 for (i = 0; i < fg->nb_inputs; i++)
1212 if (fg->inputs[i]->ist == ist)
1217 int filtergraph_is_simple(FilterGraph *fg)
1219 return !fg->graph_desc;