3 * Copyright (c) 2007 Bobby Bingham
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/atomic.h"
23 #include "libavutil/avassert.h"
24 #include "libavutil/avstring.h"
25 #include "libavutil/channel_layout.h"
26 #include "libavutil/common.h"
27 #include "libavutil/eval.h"
28 #include "libavutil/imgutils.h"
29 #include "libavutil/internal.h"
30 #include "libavutil/opt.h"
31 #include "libavutil/pixdesc.h"
32 #include "libavutil/rational.h"
33 #include "libavutil/samplefmt.h"
41 static int ff_filter_frame_framed(AVFilterLink *link, AVFrame *frame);
43 void ff_tlog_ref(void *ctx, AVFrame *ref, int end)
45 av_unused char buf[16];
47 "ref[%p buf:%p data:%p linesize[%d, %d, %d, %d] pts:%"PRId64" pos:%"PRId64,
48 ref, ref->buf, ref->data[0],
49 ref->linesize[0], ref->linesize[1], ref->linesize[2], ref->linesize[3],
50 ref->pts, av_frame_get_pkt_pos(ref));
53 ff_tlog(ctx, " a:%d/%d s:%dx%d i:%c iskey:%d type:%c",
54 ref->sample_aspect_ratio.num, ref->sample_aspect_ratio.den,
55 ref->width, ref->height,
56 !ref->interlaced_frame ? 'P' : /* Progressive */
57 ref->top_field_first ? 'T' : 'B', /* Top / Bottom */
59 av_get_picture_type_char(ref->pict_type));
61 if (ref->nb_samples) {
62 ff_tlog(ctx, " cl:%"PRId64"d n:%d r:%d",
68 ff_tlog(ctx, "]%s", end ? "\n" : "");
71 unsigned avfilter_version(void)
73 av_assert0(LIBAVFILTER_VERSION_MICRO >= 100);
74 return LIBAVFILTER_VERSION_INT;
77 const char *avfilter_configuration(void)
79 return FFMPEG_CONFIGURATION;
82 const char *avfilter_license(void)
84 #define LICENSE_PREFIX "libavfilter license: "
85 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
88 void ff_command_queue_pop(AVFilterContext *filter)
90 AVFilterCommand *c= filter->command_queue;
92 av_freep(&c->command);
93 filter->command_queue= c->next;
97 int ff_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
98 AVFilterPad **pads, AVFilterLink ***links,
101 AVFilterLink **newlinks;
102 AVFilterPad *newpads;
105 idx = FFMIN(idx, *count);
107 newpads = av_realloc_array(*pads, *count + 1, sizeof(AVFilterPad));
108 newlinks = av_realloc_array(*links, *count + 1, sizeof(AVFilterLink*));
113 if (!newpads || !newlinks)
114 return AVERROR(ENOMEM);
116 memmove(*pads + idx + 1, *pads + idx, sizeof(AVFilterPad) * (*count - idx));
117 memmove(*links + idx + 1, *links + idx, sizeof(AVFilterLink*) * (*count - idx));
118 memcpy(*pads + idx, newpad, sizeof(AVFilterPad));
119 (*links)[idx] = NULL;
122 for (i = idx + 1; i < *count; i++)
124 (*(unsigned *)((uint8_t *) *links[i] + padidx_off))++;
129 int avfilter_link(AVFilterContext *src, unsigned srcpad,
130 AVFilterContext *dst, unsigned dstpad)
134 if (src->nb_outputs <= srcpad || dst->nb_inputs <= dstpad ||
135 src->outputs[srcpad] || dst->inputs[dstpad])
138 if (src->output_pads[srcpad].type != dst->input_pads[dstpad].type) {
139 av_log(src, AV_LOG_ERROR,
140 "Media type mismatch between the '%s' filter output pad %d (%s) and the '%s' filter input pad %d (%s)\n",
141 src->name, srcpad, (char *)av_x_if_null(av_get_media_type_string(src->output_pads[srcpad].type), "?"),
142 dst->name, dstpad, (char *)av_x_if_null(av_get_media_type_string(dst-> input_pads[dstpad].type), "?"));
143 return AVERROR(EINVAL);
146 link = av_mallocz(sizeof(*link));
148 return AVERROR(ENOMEM);
150 src->outputs[srcpad] = dst->inputs[dstpad] = link;
154 link->srcpad = &src->output_pads[srcpad];
155 link->dstpad = &dst->input_pads[dstpad];
156 link->type = src->output_pads[srcpad].type;
157 av_assert0(AV_PIX_FMT_NONE == -1 && AV_SAMPLE_FMT_NONE == -1);
163 void avfilter_link_free(AVFilterLink **link)
168 av_frame_free(&(*link)->partial_buf);
173 int avfilter_link_get_channels(AVFilterLink *link)
175 return link->channels;
178 void avfilter_link_set_closed(AVFilterLink *link, int closed)
180 link->closed = closed;
183 int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
184 unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
187 unsigned dstpad_idx = link->dstpad - link->dst->input_pads;
189 av_log(link->dst, AV_LOG_VERBOSE, "auto-inserting filter '%s' "
190 "between the filter '%s' and the filter '%s'\n",
191 filt->name, link->src->name, link->dst->name);
193 link->dst->inputs[dstpad_idx] = NULL;
194 if ((ret = avfilter_link(filt, filt_dstpad_idx, link->dst, dstpad_idx)) < 0) {
195 /* failed to link output filter to new filter */
196 link->dst->inputs[dstpad_idx] = link;
200 /* re-hookup the link to the new destination filter we inserted */
202 link->dstpad = &filt->input_pads[filt_srcpad_idx];
203 filt->inputs[filt_srcpad_idx] = link;
205 /* if any information on supported media formats already exists on the
206 * link, we need to preserve that */
207 if (link->out_formats)
208 ff_formats_changeref(&link->out_formats,
209 &filt->outputs[filt_dstpad_idx]->out_formats);
210 if (link->out_samplerates)
211 ff_formats_changeref(&link->out_samplerates,
212 &filt->outputs[filt_dstpad_idx]->out_samplerates);
213 if (link->out_channel_layouts)
214 ff_channel_layouts_changeref(&link->out_channel_layouts,
215 &filt->outputs[filt_dstpad_idx]->out_channel_layouts);
220 int avfilter_config_links(AVFilterContext *filter)
222 int (*config_link)(AVFilterLink *);
226 for (i = 0; i < filter->nb_inputs; i ++) {
227 AVFilterLink *link = filter->inputs[i];
228 AVFilterLink *inlink;
232 inlink = link->src->nb_inputs ? link->src->inputs[0] : NULL;
233 link->current_pts = AV_NOPTS_VALUE;
235 switch (link->init_state) {
238 case AVLINK_STARTINIT:
239 av_log(filter, AV_LOG_INFO, "circular filter chain detected\n");
242 link->init_state = AVLINK_STARTINIT;
244 if ((ret = avfilter_config_links(link->src)) < 0)
247 if (!(config_link = link->srcpad->config_props)) {
248 if (link->src->nb_inputs != 1) {
249 av_log(link->src, AV_LOG_ERROR, "Source filters and filters "
250 "with more than one input "
251 "must set config_props() "
252 "callbacks on all outputs\n");
253 return AVERROR(EINVAL);
255 } else if ((ret = config_link(link)) < 0) {
256 av_log(link->src, AV_LOG_ERROR,
257 "Failed to configure output pad on %s\n",
262 switch (link->type) {
263 case AVMEDIA_TYPE_VIDEO:
264 if (!link->time_base.num && !link->time_base.den)
265 link->time_base = inlink ? inlink->time_base : AV_TIME_BASE_Q;
267 if (!link->sample_aspect_ratio.num && !link->sample_aspect_ratio.den)
268 link->sample_aspect_ratio = inlink ?
269 inlink->sample_aspect_ratio : (AVRational){1,1};
271 if (inlink && !link->frame_rate.num && !link->frame_rate.den)
272 link->frame_rate = inlink->frame_rate;
279 } else if (!link->w || !link->h) {
280 av_log(link->src, AV_LOG_ERROR,
281 "Video source filters must set their output link's "
282 "width and height\n");
283 return AVERROR(EINVAL);
287 case AVMEDIA_TYPE_AUDIO:
289 if (!link->time_base.num && !link->time_base.den)
290 link->time_base = inlink->time_base;
293 if (!link->time_base.num && !link->time_base.den)
294 link->time_base = (AVRational) {1, link->sample_rate};
297 if ((config_link = link->dstpad->config_props))
298 if ((ret = config_link(link)) < 0) {
299 av_log(link->src, AV_LOG_ERROR,
300 "Failed to configure input pad on %s\n",
305 link->init_state = AVLINK_INIT;
312 void ff_tlog_link(void *ctx, AVFilterLink *link, int end)
314 if (link->type == AVMEDIA_TYPE_VIDEO) {
316 "link[%p s:%dx%d fmt:%s %s->%s]%s",
317 link, link->w, link->h,
318 av_get_pix_fmt_name(link->format),
319 link->src ? link->src->filter->name : "",
320 link->dst ? link->dst->filter->name : "",
324 av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);
327 "link[%p r:%d cl:%s fmt:%s %s->%s]%s",
328 link, (int)link->sample_rate, buf,
329 av_get_sample_fmt_name(link->format),
330 link->src ? link->src->filter->name : "",
331 link->dst ? link->dst->filter->name : "",
336 int ff_request_frame(AVFilterLink *link)
339 FF_TPRINTF_START(NULL, request_frame); ff_tlog_link(NULL, link, 1);
343 av_assert0(!link->frame_requested);
344 link->frame_requested = 1;
345 while (link->frame_requested) {
346 if (link->srcpad->request_frame)
347 ret = link->srcpad->request_frame(link);
348 else if (link->src->inputs[0])
349 ret = ff_request_frame(link->src->inputs[0]);
350 if (ret == AVERROR_EOF && link->partial_buf) {
351 AVFrame *pbuf = link->partial_buf;
352 link->partial_buf = NULL;
353 ret = ff_filter_frame_framed(link, pbuf);
356 link->frame_requested = 0;
357 if (ret == AVERROR_EOF)
360 av_assert0(!link->frame_requested ||
361 link->flags & FF_LINK_FLAG_REQUEST_LOOP);
367 int ff_poll_frame(AVFilterLink *link)
369 int i, min = INT_MAX;
371 if (link->srcpad->poll_frame)
372 return link->srcpad->poll_frame(link);
374 for (i = 0; i < link->src->nb_inputs; i++) {
376 if (!link->src->inputs[i])
378 val = ff_poll_frame(link->src->inputs[i]);
379 min = FFMIN(min, val);
385 static const char *const var_names[] = { "t", "n", "pos", NULL };
386 enum { VAR_T, VAR_N, VAR_POS, VAR_VARS_NB };
388 static int set_enable_expr(AVFilterContext *ctx, const char *expr)
392 AVExpr *old = ctx->enable;
394 if (!(ctx->filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE)) {
395 av_log(ctx, AV_LOG_ERROR, "Timeline ('enable' option) not supported "
396 "with filter '%s'\n", ctx->filter->name);
397 return AVERROR_PATCHWELCOME;
400 expr_dup = av_strdup(expr);
402 return AVERROR(ENOMEM);
404 if (!ctx->var_values) {
405 ctx->var_values = av_calloc(VAR_VARS_NB, sizeof(*ctx->var_values));
406 if (!ctx->var_values) {
408 return AVERROR(ENOMEM);
412 ret = av_expr_parse((AVExpr**)&ctx->enable, expr_dup, var_names,
413 NULL, NULL, NULL, NULL, 0, ctx->priv);
415 av_log(ctx->priv, AV_LOG_ERROR,
416 "Error when evaluating the expression '%s' for enable\n",
423 av_free(ctx->enable_str);
424 ctx->enable_str = expr_dup;
428 void ff_update_link_current_pts(AVFilterLink *link, int64_t pts)
430 if (pts == AV_NOPTS_VALUE)
432 link->current_pts = av_rescale_q(pts, link->time_base, AV_TIME_BASE_Q);
433 /* TODO use duration */
434 if (link->graph && link->age_index >= 0)
435 ff_avfilter_graph_update_heap(link->graph, link);
438 int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags)
440 if(!strcmp(cmd, "ping")){
441 char local_res[256] = {0};
445 res_len = sizeof(local_res);
447 av_strlcatf(res, res_len, "pong from:%s %s\n", filter->filter->name, filter->name);
448 if (res == local_res)
449 av_log(filter, AV_LOG_INFO, "%s", res);
451 }else if(!strcmp(cmd, "enable")) {
452 return set_enable_expr(filter, arg);
453 }else if(filter->filter->process_command) {
454 return filter->filter->process_command(filter, cmd, arg, res, res_len, flags);
456 return AVERROR(ENOSYS);
459 static AVFilter *first_filter;
461 AVFilter *avfilter_get_by_name(const char *name)
463 const AVFilter *f = NULL;
468 while ((f = avfilter_next(f)))
469 if (!strcmp(f->name, name))
470 return (AVFilter *)f;
475 int avfilter_register(AVFilter *filter)
477 AVFilter **f = &first_filter;
480 /* the filter must select generic or internal exclusively */
481 av_assert0((filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE) != AVFILTER_FLAG_SUPPORT_TIMELINE);
483 for(i=0; filter->inputs && filter->inputs[i].name; i++) {
484 const AVFilterPad *input = &filter->inputs[i];
485 av_assert0( !input->filter_frame
486 || (!input->start_frame && !input->end_frame));
491 while(avpriv_atomic_ptr_cas((void * volatile *)f, NULL, filter))
497 const AVFilter *avfilter_next(const AVFilter *prev)
499 return prev ? prev->next : first_filter;
502 #if FF_API_OLD_FILTER_REGISTER
503 AVFilter **av_filter_next(AVFilter **filter)
505 return filter ? &(*filter)->next : &first_filter;
508 void avfilter_uninit(void)
513 int avfilter_pad_count(const AVFilterPad *pads)
520 for (count = 0; pads->name; count++)
525 static const char *default_filter_name(void *filter_ctx)
527 AVFilterContext *ctx = filter_ctx;
528 return ctx->name ? ctx->name : ctx->filter->name;
531 static void *filter_child_next(void *obj, void *prev)
533 AVFilterContext *ctx = obj;
534 if (!prev && ctx->filter && ctx->filter->priv_class && ctx->priv)
539 static const AVClass *filter_child_class_next(const AVClass *prev)
541 const AVFilter *f = NULL;
543 /* find the filter that corresponds to prev */
544 while (prev && (f = avfilter_next(f)))
545 if (f->priv_class == prev)
548 /* could not find filter corresponding to prev */
552 /* find next filter with specific options */
553 while ((f = avfilter_next(f)))
555 return f->priv_class;
560 #define OFFSET(x) offsetof(AVFilterContext, x)
561 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM
562 static const AVOption avfilter_options[] = {
563 { "thread_type", "Allowed thread types", OFFSET(thread_type), AV_OPT_TYPE_FLAGS,
564 { .i64 = AVFILTER_THREAD_SLICE }, 0, INT_MAX, FLAGS, "thread_type" },
565 { "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .unit = "thread_type" },
566 { "enable", "set enable expression", OFFSET(enable_str), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
570 static const AVClass avfilter_class = {
571 .class_name = "AVFilter",
572 .item_name = default_filter_name,
573 .version = LIBAVUTIL_VERSION_INT,
574 .category = AV_CLASS_CATEGORY_FILTER,
575 .child_next = filter_child_next,
576 .child_class_next = filter_child_class_next,
577 .option = avfilter_options,
580 static int default_execute(AVFilterContext *ctx, action_func *func, void *arg,
581 int *ret, int nb_jobs)
585 for (i = 0; i < nb_jobs; i++) {
586 int r = func(ctx, arg, i, nb_jobs);
593 AVFilterContext *ff_filter_alloc(const AVFilter *filter, const char *inst_name)
595 AVFilterContext *ret;
600 ret = av_mallocz(sizeof(AVFilterContext));
604 ret->av_class = &avfilter_class;
605 ret->filter = filter;
606 ret->name = inst_name ? av_strdup(inst_name) : NULL;
607 if (filter->priv_size) {
608 ret->priv = av_mallocz(filter->priv_size);
613 av_opt_set_defaults(ret);
614 if (filter->priv_class) {
615 *(const AVClass**)ret->priv = filter->priv_class;
616 av_opt_set_defaults(ret->priv);
619 ret->internal = av_mallocz(sizeof(*ret->internal));
622 ret->internal->execute = default_execute;
624 ret->nb_inputs = avfilter_pad_count(filter->inputs);
625 if (ret->nb_inputs ) {
626 ret->input_pads = av_malloc(sizeof(AVFilterPad) * ret->nb_inputs);
627 if (!ret->input_pads)
629 memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->nb_inputs);
630 ret->inputs = av_mallocz(sizeof(AVFilterLink*) * ret->nb_inputs);
635 ret->nb_outputs = avfilter_pad_count(filter->outputs);
636 if (ret->nb_outputs) {
637 ret->output_pads = av_malloc(sizeof(AVFilterPad) * ret->nb_outputs);
638 if (!ret->output_pads)
640 memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->nb_outputs);
641 ret->outputs = av_mallocz(sizeof(AVFilterLink*) * ret->nb_outputs);
646 FF_DISABLE_DEPRECATION_WARNINGS
647 ret->output_count = ret->nb_outputs;
648 ret->input_count = ret->nb_inputs;
649 FF_ENABLE_DEPRECATION_WARNINGS
655 av_freep(&ret->inputs);
656 av_freep(&ret->input_pads);
658 av_freep(&ret->outputs);
659 av_freep(&ret->output_pads);
661 av_freep(&ret->priv);
662 av_freep(&ret->internal);
667 #if FF_API_AVFILTER_OPEN
668 int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
670 *filter_ctx = ff_filter_alloc(filter, inst_name);
671 return *filter_ctx ? 0 : AVERROR(ENOMEM);
675 static void free_link(AVFilterLink *link)
681 link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
683 link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
685 ff_formats_unref(&link->in_formats);
686 ff_formats_unref(&link->out_formats);
687 ff_formats_unref(&link->in_samplerates);
688 ff_formats_unref(&link->out_samplerates);
689 ff_channel_layouts_unref(&link->in_channel_layouts);
690 ff_channel_layouts_unref(&link->out_channel_layouts);
691 avfilter_link_free(&link);
694 void avfilter_free(AVFilterContext *filter)
702 ff_filter_graph_remove_filter(filter->graph, filter);
704 if (filter->filter->uninit)
705 filter->filter->uninit(filter);
707 for (i = 0; i < filter->nb_inputs; i++) {
708 free_link(filter->inputs[i]);
710 for (i = 0; i < filter->nb_outputs; i++) {
711 free_link(filter->outputs[i]);
714 if (filter->filter->priv_class)
715 av_opt_free(filter->priv);
717 av_freep(&filter->name);
718 av_freep(&filter->input_pads);
719 av_freep(&filter->output_pads);
720 av_freep(&filter->inputs);
721 av_freep(&filter->outputs);
722 av_freep(&filter->priv);
723 while(filter->command_queue){
724 ff_command_queue_pop(filter);
727 av_expr_free(filter->enable);
728 filter->enable = NULL;
729 av_freep(&filter->var_values);
730 av_freep(&filter->internal);
734 static int process_options(AVFilterContext *ctx, AVDictionary **options,
737 const AVOption *o = NULL;
739 char *av_uninit(parsed_key), *av_uninit(value);
747 const char *shorthand = NULL;
749 o = av_opt_next(ctx->priv, o);
751 if (o->type == AV_OPT_TYPE_CONST || o->offset == offset)
757 ret = av_opt_get_key_value(&args, "=", ":",
758 shorthand ? AV_OPT_FLAG_IMPLICIT_KEY : 0,
759 &parsed_key, &value);
761 if (ret == AVERROR(EINVAL))
762 av_log(ctx, AV_LOG_ERROR, "No option name near '%s'\n", args);
764 av_log(ctx, AV_LOG_ERROR, "Unable to parse '%s': %s\n", args,
772 while ((o = av_opt_next(ctx->priv, o))); /* discard all remaining shorthand */
777 av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value);
779 if (av_opt_find(ctx, key, NULL, 0, 0)) {
780 ret = av_opt_set(ctx, key, value, 0);
787 av_dict_set(options, key, value, 0);
788 if ((ret = av_opt_set(ctx->priv, key, value, 0)) < 0) {
789 if (!av_opt_find(ctx->priv, key, NULL, 0, AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ)) {
790 if (ret == AVERROR_OPTION_NOT_FOUND)
791 av_log(ctx, AV_LOG_ERROR, "Option '%s' not found\n", key);
804 if (ctx->enable_str) {
805 ret = set_enable_expr(ctx, ctx->enable_str);
812 #if FF_API_AVFILTER_INIT_FILTER
813 int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
815 return avfilter_init_str(filter, args);
819 int avfilter_init_dict(AVFilterContext *ctx, AVDictionary **options)
823 ret = av_opt_set_dict(ctx, options);
825 av_log(ctx, AV_LOG_ERROR, "Error applying generic filter options.\n");
829 if (ctx->filter->flags & AVFILTER_FLAG_SLICE_THREADS &&
830 ctx->thread_type & ctx->graph->thread_type & AVFILTER_THREAD_SLICE &&
831 ctx->graph->internal->thread_execute) {
832 ctx->thread_type = AVFILTER_THREAD_SLICE;
833 ctx->internal->execute = ctx->graph->internal->thread_execute;
835 ctx->thread_type = 0;
838 if (ctx->filter->priv_class) {
839 ret = av_opt_set_dict(ctx->priv, options);
841 av_log(ctx, AV_LOG_ERROR, "Error applying options to the filter.\n");
846 if (ctx->filter->init_opaque)
847 ret = ctx->filter->init_opaque(ctx, NULL);
848 else if (ctx->filter->init)
849 ret = ctx->filter->init(ctx);
850 else if (ctx->filter->init_dict)
851 ret = ctx->filter->init_dict(ctx, options);
856 int avfilter_init_str(AVFilterContext *filter, const char *args)
858 AVDictionary *options = NULL;
859 AVDictionaryEntry *e;
863 if (!filter->filter->priv_class) {
864 av_log(filter, AV_LOG_ERROR, "This filter does not take any "
865 "options, but options were provided: %s.\n", args);
866 return AVERROR(EINVAL);
869 #if FF_API_OLD_FILTER_OPTS
870 if ( !strcmp(filter->filter->name, "format") ||
871 !strcmp(filter->filter->name, "noformat") ||
872 !strcmp(filter->filter->name, "frei0r") ||
873 !strcmp(filter->filter->name, "frei0r_src") ||
874 !strcmp(filter->filter->name, "ocv") ||
875 !strcmp(filter->filter->name, "pan") ||
876 !strcmp(filter->filter->name, "pp") ||
877 !strcmp(filter->filter->name, "aevalsrc")) {
878 /* a hack for compatibility with the old syntax
879 * replace colons with |s */
880 char *copy = av_strdup(args);
882 int nb_leading = 0; // number of leading colons to skip
886 ret = AVERROR(ENOMEM);
890 if (!strcmp(filter->filter->name, "frei0r") ||
891 !strcmp(filter->filter->name, "ocv"))
893 else if (!strcmp(filter->filter->name, "frei0r_src"))
896 while (nb_leading--) {
899 p = copy + strlen(copy);
905 deprecated = strchr(p, ':') != NULL;
907 if (!strcmp(filter->filter->name, "aevalsrc")) {
909 while ((p = strchr(p, ':')) && p[1] != ':') {
910 const char *epos = strchr(p + 1, '=');
911 const char *spos = strchr(p + 1, ':');
912 const int next_token_is_opt = epos && (!spos || epos < spos);
913 if (next_token_is_opt) {
917 /* next token does not contain a '=', assume a channel expression */
921 if (p && *p == ':') { // double sep '::' found
923 memmove(p, p + 1, strlen(p));
926 while ((p = strchr(p, ':')))
930 av_log(filter, AV_LOG_WARNING, "This syntax is deprecated. Use "
931 "'|' to separate the list items.\n");
933 av_log(filter, AV_LOG_DEBUG, "compat: called with args=[%s]\n", copy);
934 ret = process_options(filter, &options, copy);
942 if (!strcmp(filter->filter->name, "mp")) {
945 if (!strncmp(args, "filter=", 7))
947 ret = av_escape(&escaped, args, ":=", AV_ESCAPE_MODE_BACKSLASH, 0);
949 av_log(filter, AV_LOG_ERROR, "Unable to escape MPlayer filters arg '%s'\n", args);
952 ret = process_options(filter, &options, escaped);
956 ret = process_options(filter, &options, args);
962 ret = avfilter_init_dict(filter, &options);
966 if ((e = av_dict_get(options, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
967 av_log(filter, AV_LOG_ERROR, "No such option: %s.\n", e->key);
968 ret = AVERROR_OPTION_NOT_FOUND;
973 av_dict_free(&options);
978 const char *avfilter_pad_get_name(const AVFilterPad *pads, int pad_idx)
980 return pads[pad_idx].name;
983 enum AVMediaType avfilter_pad_get_type(const AVFilterPad *pads, int pad_idx)
985 return pads[pad_idx].type;
988 static int default_filter_frame(AVFilterLink *link, AVFrame *frame)
990 return ff_filter_frame(link->dst->outputs[0], frame);
993 static int ff_filter_frame_framed(AVFilterLink *link, AVFrame *frame)
995 int (*filter_frame)(AVFilterLink *, AVFrame *);
996 AVFilterContext *dstctx = link->dst;
997 AVFilterPad *dst = link->dstpad;
1000 AVFilterCommand *cmd= link->dst->command_queue;
1004 av_frame_free(&frame);
1008 if (!(filter_frame = dst->filter_frame))
1009 filter_frame = default_filter_frame;
1011 /* copy the frame if needed */
1012 if (dst->needs_writable && !av_frame_is_writable(frame)) {
1013 av_log(link->dst, AV_LOG_DEBUG, "Copying data in avfilter.\n");
1015 /* Maybe use ff_copy_buffer_ref instead? */
1016 switch (link->type) {
1017 case AVMEDIA_TYPE_VIDEO:
1018 out = ff_get_video_buffer(link, link->w, link->h);
1020 case AVMEDIA_TYPE_AUDIO:
1021 out = ff_get_audio_buffer(link, frame->nb_samples);
1023 default: return AVERROR(EINVAL);
1026 av_frame_free(&frame);
1027 return AVERROR(ENOMEM);
1029 av_frame_copy_props(out, frame);
1031 switch (link->type) {
1032 case AVMEDIA_TYPE_VIDEO:
1033 av_image_copy(out->data, out->linesize, (const uint8_t **)frame->data, frame->linesize,
1034 frame->format, frame->width, frame->height);
1036 case AVMEDIA_TYPE_AUDIO:
1037 av_samples_copy(out->extended_data, frame->extended_data,
1038 0, 0, frame->nb_samples,
1039 av_get_channel_layout_nb_channels(frame->channel_layout),
1042 default: return AVERROR(EINVAL);
1045 av_frame_free(&frame);
1049 while(cmd && cmd->time <= out->pts * av_q2d(link->time_base)){
1050 av_log(link->dst, AV_LOG_DEBUG,
1051 "Processing command time:%f command:%s arg:%s\n",
1052 cmd->time, cmd->command, cmd->arg);
1053 avfilter_process_command(link->dst, cmd->command, cmd->arg, 0, 0, cmd->flags);
1054 ff_command_queue_pop(link->dst);
1055 cmd= link->dst->command_queue;
1059 if (dstctx->enable_str) {
1060 int64_t pos = av_frame_get_pkt_pos(out);
1061 dstctx->var_values[VAR_N] = link->frame_count;
1062 dstctx->var_values[VAR_T] = pts == AV_NOPTS_VALUE ? NAN : pts * av_q2d(link->time_base);
1063 dstctx->var_values[VAR_POS] = pos == -1 ? NAN : pos;
1065 dstctx->is_disabled = fabs(av_expr_eval(dstctx->enable, dstctx->var_values, NULL)) < 0.5;
1066 if (dstctx->is_disabled &&
1067 (dstctx->filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC))
1068 filter_frame = default_filter_frame;
1070 ret = filter_frame(link, out);
1071 link->frame_count++;
1072 link->frame_requested = 0;
1073 ff_update_link_current_pts(link, pts);
1077 static int ff_filter_frame_needs_framing(AVFilterLink *link, AVFrame *frame)
1079 int insamples = frame->nb_samples, inpos = 0, nb_samples;
1080 AVFrame *pbuf = link->partial_buf;
1081 int nb_channels = av_frame_get_channels(frame);
1084 link->flags |= FF_LINK_FLAG_REQUEST_LOOP;
1085 /* Handle framing (min_samples, max_samples) */
1088 AVRational samples_tb = { 1, link->sample_rate };
1089 pbuf = ff_get_audio_buffer(link, link->partial_buf_size);
1091 av_log(link->dst, AV_LOG_WARNING,
1092 "Samples dropped due to memory allocation failure.\n");
1095 av_frame_copy_props(pbuf, frame);
1096 pbuf->pts = frame->pts +
1097 av_rescale_q(inpos, samples_tb, link->time_base);
1098 pbuf->nb_samples = 0;
1100 nb_samples = FFMIN(insamples,
1101 link->partial_buf_size - pbuf->nb_samples);
1102 av_samples_copy(pbuf->extended_data, frame->extended_data,
1103 pbuf->nb_samples, inpos,
1104 nb_samples, nb_channels, link->format);
1105 inpos += nb_samples;
1106 insamples -= nb_samples;
1107 pbuf->nb_samples += nb_samples;
1108 if (pbuf->nb_samples >= link->min_samples) {
1109 ret = ff_filter_frame_framed(link, pbuf);
1113 av_frame_free(&frame);
1114 link->partial_buf = pbuf;
1118 int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
1120 FF_TPRINTF_START(NULL, filter_frame); ff_tlog_link(NULL, link, 1); ff_tlog(NULL, " "); ff_tlog_ref(NULL, frame, 1);
1122 /* Consistency checks */
1123 if (link->type == AVMEDIA_TYPE_VIDEO) {
1124 if (strcmp(link->dst->filter->name, "scale")) {
1125 av_assert1(frame->format == link->format);
1126 av_assert1(frame->width == link->w);
1127 av_assert1(frame->height == link->h);
1130 av_assert1(frame->format == link->format);
1131 av_assert1(av_frame_get_channels(frame) == link->channels);
1132 av_assert1(frame->channel_layout == link->channel_layout);
1133 av_assert1(frame->sample_rate == link->sample_rate);
1136 /* Go directly to actual filtering if possible */
1137 if (link->type == AVMEDIA_TYPE_AUDIO &&
1138 link->min_samples &&
1139 (link->partial_buf ||
1140 frame->nb_samples < link->min_samples ||
1141 frame->nb_samples > link->max_samples)) {
1142 return ff_filter_frame_needs_framing(link, frame);
1144 return ff_filter_frame_framed(link, frame);
1148 const AVClass *avfilter_get_class(void)
1150 return &avfilter_class;