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"
40 #include "libavutil/ffversion.h"
41 const char av_filter_ffversion[] = "FFmpeg version " FFMPEG_VERSION;
43 static int ff_filter_frame_framed(AVFilterLink *link, AVFrame *frame);
45 void ff_tlog_ref(void *ctx, AVFrame *ref, int end)
47 av_unused char buf[16];
49 "ref[%p buf:%p data:%p linesize[%d, %d, %d, %d] pts:%"PRId64" pos:%"PRId64,
50 ref, ref->buf, ref->data[0],
51 ref->linesize[0], ref->linesize[1], ref->linesize[2], ref->linesize[3],
52 ref->pts, av_frame_get_pkt_pos(ref));
55 ff_tlog(ctx, " a:%d/%d s:%dx%d i:%c iskey:%d type:%c",
56 ref->sample_aspect_ratio.num, ref->sample_aspect_ratio.den,
57 ref->width, ref->height,
58 !ref->interlaced_frame ? 'P' : /* Progressive */
59 ref->top_field_first ? 'T' : 'B', /* Top / Bottom */
61 av_get_picture_type_char(ref->pict_type));
63 if (ref->nb_samples) {
64 ff_tlog(ctx, " cl:%"PRId64"d n:%d r:%d",
70 ff_tlog(ctx, "]%s", end ? "\n" : "");
73 unsigned avfilter_version(void)
75 av_assert0(LIBAVFILTER_VERSION_MICRO >= 100);
76 return LIBAVFILTER_VERSION_INT;
79 const char *avfilter_configuration(void)
81 return FFMPEG_CONFIGURATION;
84 const char *avfilter_license(void)
86 #define LICENSE_PREFIX "libavfilter license: "
87 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
90 void ff_command_queue_pop(AVFilterContext *filter)
92 AVFilterCommand *c= filter->command_queue;
94 av_freep(&c->command);
95 filter->command_queue= c->next;
99 int ff_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
100 AVFilterPad **pads, AVFilterLink ***links,
103 AVFilterLink **newlinks;
104 AVFilterPad *newpads;
107 idx = FFMIN(idx, *count);
109 newpads = av_realloc_array(*pads, *count + 1, sizeof(AVFilterPad));
110 newlinks = av_realloc_array(*links, *count + 1, sizeof(AVFilterLink*));
115 if (!newpads || !newlinks)
116 return AVERROR(ENOMEM);
118 memmove(*pads + idx + 1, *pads + idx, sizeof(AVFilterPad) * (*count - idx));
119 memmove(*links + idx + 1, *links + idx, sizeof(AVFilterLink*) * (*count - idx));
120 memcpy(*pads + idx, newpad, sizeof(AVFilterPad));
121 (*links)[idx] = NULL;
124 for (i = idx + 1; i < *count; i++)
126 (*(unsigned *)((uint8_t *) (*links)[i] + padidx_off))++;
131 int avfilter_link(AVFilterContext *src, unsigned srcpad,
132 AVFilterContext *dst, unsigned dstpad)
136 if (src->nb_outputs <= srcpad || dst->nb_inputs <= dstpad ||
137 src->outputs[srcpad] || dst->inputs[dstpad])
138 return AVERROR(EINVAL);
140 if (src->output_pads[srcpad].type != dst->input_pads[dstpad].type) {
141 av_log(src, AV_LOG_ERROR,
142 "Media type mismatch between the '%s' filter output pad %d (%s) and the '%s' filter input pad %d (%s)\n",
143 src->name, srcpad, (char *)av_x_if_null(av_get_media_type_string(src->output_pads[srcpad].type), "?"),
144 dst->name, dstpad, (char *)av_x_if_null(av_get_media_type_string(dst-> input_pads[dstpad].type), "?"));
145 return AVERROR(EINVAL);
148 link = av_mallocz(sizeof(*link));
150 return AVERROR(ENOMEM);
152 src->outputs[srcpad] = dst->inputs[dstpad] = link;
156 link->srcpad = &src->output_pads[srcpad];
157 link->dstpad = &dst->input_pads[dstpad];
158 link->type = src->output_pads[srcpad].type;
159 av_assert0(AV_PIX_FMT_NONE == -1 && AV_SAMPLE_FMT_NONE == -1);
165 void avfilter_link_free(AVFilterLink **link)
170 av_frame_free(&(*link)->partial_buf);
175 int avfilter_link_get_channels(AVFilterLink *link)
177 return link->channels;
180 void avfilter_link_set_closed(AVFilterLink *link, int closed)
182 link->closed = closed;
185 int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
186 unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
189 unsigned dstpad_idx = link->dstpad - link->dst->input_pads;
191 av_log(link->dst, AV_LOG_VERBOSE, "auto-inserting filter '%s' "
192 "between the filter '%s' and the filter '%s'\n",
193 filt->name, link->src->name, link->dst->name);
195 link->dst->inputs[dstpad_idx] = NULL;
196 if ((ret = avfilter_link(filt, filt_dstpad_idx, link->dst, dstpad_idx)) < 0) {
197 /* failed to link output filter to new filter */
198 link->dst->inputs[dstpad_idx] = link;
202 /* re-hookup the link to the new destination filter we inserted */
204 link->dstpad = &filt->input_pads[filt_srcpad_idx];
205 filt->inputs[filt_srcpad_idx] = link;
207 /* if any information on supported media formats already exists on the
208 * link, we need to preserve that */
209 if (link->out_formats)
210 ff_formats_changeref(&link->out_formats,
211 &filt->outputs[filt_dstpad_idx]->out_formats);
212 if (link->out_samplerates)
213 ff_formats_changeref(&link->out_samplerates,
214 &filt->outputs[filt_dstpad_idx]->out_samplerates);
215 if (link->out_channel_layouts)
216 ff_channel_layouts_changeref(&link->out_channel_layouts,
217 &filt->outputs[filt_dstpad_idx]->out_channel_layouts);
222 int avfilter_config_links(AVFilterContext *filter)
224 int (*config_link)(AVFilterLink *);
228 for (i = 0; i < filter->nb_inputs; i ++) {
229 AVFilterLink *link = filter->inputs[i];
230 AVFilterLink *inlink;
233 if (!link->src || !link->dst) {
234 av_log(filter, AV_LOG_ERROR,
235 "Not all input and output are properly linked (%d).\n", i);
236 return AVERROR(EINVAL);
239 inlink = link->src->nb_inputs ? link->src->inputs[0] : NULL;
240 link->current_pts = AV_NOPTS_VALUE;
242 switch (link->init_state) {
245 case AVLINK_STARTINIT:
246 av_log(filter, AV_LOG_INFO, "circular filter chain detected\n");
249 link->init_state = AVLINK_STARTINIT;
251 if ((ret = avfilter_config_links(link->src)) < 0)
254 if (!(config_link = link->srcpad->config_props)) {
255 if (link->src->nb_inputs != 1) {
256 av_log(link->src, AV_LOG_ERROR, "Source filters and filters "
257 "with more than one input "
258 "must set config_props() "
259 "callbacks on all outputs\n");
260 return AVERROR(EINVAL);
262 } else if ((ret = config_link(link)) < 0) {
263 av_log(link->src, AV_LOG_ERROR,
264 "Failed to configure output pad on %s\n",
269 switch (link->type) {
270 case AVMEDIA_TYPE_VIDEO:
271 if (!link->time_base.num && !link->time_base.den)
272 link->time_base = inlink ? inlink->time_base : AV_TIME_BASE_Q;
274 if (!link->sample_aspect_ratio.num && !link->sample_aspect_ratio.den)
275 link->sample_aspect_ratio = inlink ?
276 inlink->sample_aspect_ratio : (AVRational){1,1};
278 if (inlink && !link->frame_rate.num && !link->frame_rate.den)
279 link->frame_rate = inlink->frame_rate;
286 } else if (!link->w || !link->h) {
287 av_log(link->src, AV_LOG_ERROR,
288 "Video source filters must set their output link's "
289 "width and height\n");
290 return AVERROR(EINVAL);
294 case AVMEDIA_TYPE_AUDIO:
296 if (!link->time_base.num && !link->time_base.den)
297 link->time_base = inlink->time_base;
300 if (!link->time_base.num && !link->time_base.den)
301 link->time_base = (AVRational) {1, link->sample_rate};
304 if ((config_link = link->dstpad->config_props))
305 if ((ret = config_link(link)) < 0) {
306 av_log(link->dst, AV_LOG_ERROR,
307 "Failed to configure input pad on %s\n",
312 link->init_state = AVLINK_INIT;
319 void ff_tlog_link(void *ctx, AVFilterLink *link, int end)
321 if (link->type == AVMEDIA_TYPE_VIDEO) {
323 "link[%p s:%dx%d fmt:%s %s->%s]%s",
324 link, link->w, link->h,
325 av_get_pix_fmt_name(link->format),
326 link->src ? link->src->filter->name : "",
327 link->dst ? link->dst->filter->name : "",
331 av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);
334 "link[%p r:%d cl:%s fmt:%s %s->%s]%s",
335 link, (int)link->sample_rate, buf,
336 av_get_sample_fmt_name(link->format),
337 link->src ? link->src->filter->name : "",
338 link->dst ? link->dst->filter->name : "",
343 int ff_request_frame(AVFilterLink *link)
346 FF_TPRINTF_START(NULL, request_frame); ff_tlog_link(NULL, link, 1);
350 av_assert0(!link->frame_requested);
351 link->frame_requested = 1;
352 while (link->frame_requested) {
353 if (link->srcpad->request_frame)
354 ret = link->srcpad->request_frame(link);
355 else if (link->src->inputs[0])
356 ret = ff_request_frame(link->src->inputs[0]);
357 if (ret == AVERROR_EOF && link->partial_buf) {
358 AVFrame *pbuf = link->partial_buf;
359 link->partial_buf = NULL;
360 ret = ff_filter_frame_framed(link, pbuf);
363 link->frame_requested = 0;
364 if (ret == AVERROR_EOF)
367 av_assert0(!link->frame_requested ||
368 link->flags & FF_LINK_FLAG_REQUEST_LOOP);
374 int ff_poll_frame(AVFilterLink *link)
376 int i, min = INT_MAX;
378 if (link->srcpad->poll_frame)
379 return link->srcpad->poll_frame(link);
381 for (i = 0; i < link->src->nb_inputs; i++) {
383 if (!link->src->inputs[i])
384 return AVERROR(EINVAL);
385 val = ff_poll_frame(link->src->inputs[i]);
386 min = FFMIN(min, val);
392 static const char *const var_names[] = {
410 static int set_enable_expr(AVFilterContext *ctx, const char *expr)
414 AVExpr *old = ctx->enable;
416 if (!(ctx->filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE)) {
417 av_log(ctx, AV_LOG_ERROR, "Timeline ('enable' option) not supported "
418 "with filter '%s'\n", ctx->filter->name);
419 return AVERROR_PATCHWELCOME;
422 expr_dup = av_strdup(expr);
424 return AVERROR(ENOMEM);
426 if (!ctx->var_values) {
427 ctx->var_values = av_calloc(VAR_VARS_NB, sizeof(*ctx->var_values));
428 if (!ctx->var_values) {
430 return AVERROR(ENOMEM);
434 ret = av_expr_parse((AVExpr**)&ctx->enable, expr_dup, var_names,
435 NULL, NULL, NULL, NULL, 0, ctx->priv);
437 av_log(ctx->priv, AV_LOG_ERROR,
438 "Error when evaluating the expression '%s' for enable\n",
445 av_free(ctx->enable_str);
446 ctx->enable_str = expr_dup;
450 void ff_update_link_current_pts(AVFilterLink *link, int64_t pts)
452 if (pts == AV_NOPTS_VALUE)
454 link->current_pts = av_rescale_q(pts, link->time_base, AV_TIME_BASE_Q);
455 /* TODO use duration */
456 if (link->graph && link->age_index >= 0)
457 ff_avfilter_graph_update_heap(link->graph, link);
460 int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags)
462 if(!strcmp(cmd, "ping")){
463 char local_res[256] = {0};
467 res_len = sizeof(local_res);
469 av_strlcatf(res, res_len, "pong from:%s %s\n", filter->filter->name, filter->name);
470 if (res == local_res)
471 av_log(filter, AV_LOG_INFO, "%s", res);
473 }else if(!strcmp(cmd, "enable")) {
474 return set_enable_expr(filter, arg);
475 }else if(filter->filter->process_command) {
476 return filter->filter->process_command(filter, cmd, arg, res, res_len, flags);
478 return AVERROR(ENOSYS);
481 static AVFilter *first_filter;
482 static AVFilter **last_filter = &first_filter;
484 #if !FF_API_NOCONST_GET_NAME
487 AVFilter *avfilter_get_by_name(const char *name)
489 const AVFilter *f = NULL;
494 while ((f = avfilter_next(f)))
495 if (!strcmp(f->name, name))
496 return (AVFilter *)f;
501 int avfilter_register(AVFilter *filter)
503 AVFilter **f = last_filter;
506 /* the filter must select generic or internal exclusively */
507 av_assert0((filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE) != AVFILTER_FLAG_SUPPORT_TIMELINE);
509 for(i=0; filter->inputs && filter->inputs[i].name; i++) {
510 const AVFilterPad *input = &filter->inputs[i];
511 av_assert0( !input->filter_frame
512 || (!input->start_frame && !input->end_frame));
517 while(*f || avpriv_atomic_ptr_cas((void * volatile *)f, NULL, filter))
519 last_filter = &filter->next;
524 const AVFilter *avfilter_next(const AVFilter *prev)
526 return prev ? prev->next : first_filter;
529 #if FF_API_OLD_FILTER_REGISTER
530 AVFilter **av_filter_next(AVFilter **filter)
532 return filter ? &(*filter)->next : &first_filter;
535 void avfilter_uninit(void)
540 int avfilter_pad_count(const AVFilterPad *pads)
547 for (count = 0; pads->name; count++)
552 static const char *default_filter_name(void *filter_ctx)
554 AVFilterContext *ctx = filter_ctx;
555 return ctx->name ? ctx->name : ctx->filter->name;
558 static void *filter_child_next(void *obj, void *prev)
560 AVFilterContext *ctx = obj;
561 if (!prev && ctx->filter && ctx->filter->priv_class && ctx->priv)
566 static const AVClass *filter_child_class_next(const AVClass *prev)
568 const AVFilter *f = NULL;
570 /* find the filter that corresponds to prev */
571 while (prev && (f = avfilter_next(f)))
572 if (f->priv_class == prev)
575 /* could not find filter corresponding to prev */
579 /* find next filter with specific options */
580 while ((f = avfilter_next(f)))
582 return f->priv_class;
587 #define OFFSET(x) offsetof(AVFilterContext, x)
588 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM
589 static const AVOption avfilter_options[] = {
590 { "thread_type", "Allowed thread types", OFFSET(thread_type), AV_OPT_TYPE_FLAGS,
591 { .i64 = AVFILTER_THREAD_SLICE }, 0, INT_MAX, FLAGS, "thread_type" },
592 { "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .unit = "thread_type" },
593 { "enable", "set enable expression", OFFSET(enable_str), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
597 static const AVClass avfilter_class = {
598 .class_name = "AVFilter",
599 .item_name = default_filter_name,
600 .version = LIBAVUTIL_VERSION_INT,
601 .category = AV_CLASS_CATEGORY_FILTER,
602 .child_next = filter_child_next,
603 .child_class_next = filter_child_class_next,
604 .option = avfilter_options,
607 static int default_execute(AVFilterContext *ctx, avfilter_action_func *func, void *arg,
608 int *ret, int nb_jobs)
612 for (i = 0; i < nb_jobs; i++) {
613 int r = func(ctx, arg, i, nb_jobs);
620 AVFilterContext *ff_filter_alloc(const AVFilter *filter, const char *inst_name)
622 AVFilterContext *ret;
627 ret = av_mallocz(sizeof(AVFilterContext));
631 ret->av_class = &avfilter_class;
632 ret->filter = filter;
633 ret->name = inst_name ? av_strdup(inst_name) : NULL;
634 if (filter->priv_size) {
635 ret->priv = av_mallocz(filter->priv_size);
640 av_opt_set_defaults(ret);
641 if (filter->priv_class) {
642 *(const AVClass**)ret->priv = filter->priv_class;
643 av_opt_set_defaults(ret->priv);
646 ret->internal = av_mallocz(sizeof(*ret->internal));
649 ret->internal->execute = default_execute;
651 ret->nb_inputs = avfilter_pad_count(filter->inputs);
652 if (ret->nb_inputs ) {
653 ret->input_pads = av_malloc_array(ret->nb_inputs, sizeof(AVFilterPad));
654 if (!ret->input_pads)
656 memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->nb_inputs);
657 ret->inputs = av_mallocz_array(ret->nb_inputs, sizeof(AVFilterLink*));
662 ret->nb_outputs = avfilter_pad_count(filter->outputs);
663 if (ret->nb_outputs) {
664 ret->output_pads = av_malloc_array(ret->nb_outputs, sizeof(AVFilterPad));
665 if (!ret->output_pads)
667 memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->nb_outputs);
668 ret->outputs = av_mallocz_array(ret->nb_outputs, sizeof(AVFilterLink*));
673 FF_DISABLE_DEPRECATION_WARNINGS
674 ret->output_count = ret->nb_outputs;
675 ret->input_count = ret->nb_inputs;
676 FF_ENABLE_DEPRECATION_WARNINGS
682 av_freep(&ret->inputs);
683 av_freep(&ret->input_pads);
685 av_freep(&ret->outputs);
686 av_freep(&ret->output_pads);
688 av_freep(&ret->priv);
689 av_freep(&ret->internal);
694 #if FF_API_AVFILTER_OPEN
695 int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
697 *filter_ctx = ff_filter_alloc(filter, inst_name);
698 return *filter_ctx ? 0 : AVERROR(ENOMEM);
702 static void free_link(AVFilterLink *link)
708 link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
710 link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
712 ff_formats_unref(&link->in_formats);
713 ff_formats_unref(&link->out_formats);
714 ff_formats_unref(&link->in_samplerates);
715 ff_formats_unref(&link->out_samplerates);
716 ff_channel_layouts_unref(&link->in_channel_layouts);
717 ff_channel_layouts_unref(&link->out_channel_layouts);
718 avfilter_link_free(&link);
721 void avfilter_free(AVFilterContext *filter)
729 ff_filter_graph_remove_filter(filter->graph, filter);
731 if (filter->filter->uninit)
732 filter->filter->uninit(filter);
734 for (i = 0; i < filter->nb_inputs; i++) {
735 free_link(filter->inputs[i]);
737 for (i = 0; i < filter->nb_outputs; i++) {
738 free_link(filter->outputs[i]);
741 if (filter->filter->priv_class)
742 av_opt_free(filter->priv);
744 av_freep(&filter->name);
745 av_freep(&filter->input_pads);
746 av_freep(&filter->output_pads);
747 av_freep(&filter->inputs);
748 av_freep(&filter->outputs);
749 av_freep(&filter->priv);
750 while(filter->command_queue){
751 ff_command_queue_pop(filter);
754 av_expr_free(filter->enable);
755 filter->enable = NULL;
756 av_freep(&filter->var_values);
757 av_freep(&filter->internal);
761 static int process_options(AVFilterContext *ctx, AVDictionary **options,
764 const AVOption *o = NULL;
766 char *av_uninit(parsed_key), *av_uninit(value);
774 const char *shorthand = NULL;
776 o = av_opt_next(ctx->priv, o);
778 if (o->type == AV_OPT_TYPE_CONST || o->offset == offset)
784 ret = av_opt_get_key_value(&args, "=", ":",
785 shorthand ? AV_OPT_FLAG_IMPLICIT_KEY : 0,
786 &parsed_key, &value);
788 if (ret == AVERROR(EINVAL))
789 av_log(ctx, AV_LOG_ERROR, "No option name near '%s'\n", args);
791 av_log(ctx, AV_LOG_ERROR, "Unable to parse '%s': %s\n", args,
799 while ((o = av_opt_next(ctx->priv, o))); /* discard all remaining shorthand */
804 av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value);
806 if (av_opt_find(ctx, key, NULL, 0, 0)) {
807 ret = av_opt_set(ctx, key, value, 0);
814 av_dict_set(options, key, value, 0);
815 if ((ret = av_opt_set(ctx->priv, key, value, 0)) < 0) {
816 if (!av_opt_find(ctx->priv, key, NULL, 0, AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ)) {
817 if (ret == AVERROR_OPTION_NOT_FOUND)
818 av_log(ctx, AV_LOG_ERROR, "Option '%s' not found\n", key);
831 if (ctx->enable_str) {
832 ret = set_enable_expr(ctx, ctx->enable_str);
839 #if FF_API_AVFILTER_INIT_FILTER
840 int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
842 return avfilter_init_str(filter, args);
846 int avfilter_init_dict(AVFilterContext *ctx, AVDictionary **options)
850 ret = av_opt_set_dict(ctx, options);
852 av_log(ctx, AV_LOG_ERROR, "Error applying generic filter options.\n");
856 if (ctx->filter->flags & AVFILTER_FLAG_SLICE_THREADS &&
857 ctx->thread_type & ctx->graph->thread_type & AVFILTER_THREAD_SLICE &&
858 ctx->graph->internal->thread_execute) {
859 ctx->thread_type = AVFILTER_THREAD_SLICE;
860 ctx->internal->execute = ctx->graph->internal->thread_execute;
862 ctx->thread_type = 0;
865 if (ctx->filter->priv_class) {
866 ret = av_opt_set_dict(ctx->priv, options);
868 av_log(ctx, AV_LOG_ERROR, "Error applying options to the filter.\n");
873 if (ctx->filter->init_opaque)
874 ret = ctx->filter->init_opaque(ctx, NULL);
875 else if (ctx->filter->init)
876 ret = ctx->filter->init(ctx);
877 else if (ctx->filter->init_dict)
878 ret = ctx->filter->init_dict(ctx, options);
883 int avfilter_init_str(AVFilterContext *filter, const char *args)
885 AVDictionary *options = NULL;
886 AVDictionaryEntry *e;
890 if (!filter->filter->priv_class) {
891 av_log(filter, AV_LOG_ERROR, "This filter does not take any "
892 "options, but options were provided: %s.\n", args);
893 return AVERROR(EINVAL);
896 #if FF_API_OLD_FILTER_OPTS
897 if ( !strcmp(filter->filter->name, "format") ||
898 !strcmp(filter->filter->name, "noformat") ||
899 !strcmp(filter->filter->name, "frei0r") ||
900 !strcmp(filter->filter->name, "frei0r_src") ||
901 !strcmp(filter->filter->name, "ocv") ||
902 !strcmp(filter->filter->name, "pan") ||
903 !strcmp(filter->filter->name, "pp") ||
904 !strcmp(filter->filter->name, "aevalsrc")) {
905 /* a hack for compatibility with the old syntax
906 * replace colons with |s */
907 char *copy = av_strdup(args);
909 int nb_leading = 0; // number of leading colons to skip
913 ret = AVERROR(ENOMEM);
917 if (!strcmp(filter->filter->name, "frei0r") ||
918 !strcmp(filter->filter->name, "ocv"))
920 else if (!strcmp(filter->filter->name, "frei0r_src"))
923 while (nb_leading--) {
926 p = copy + strlen(copy);
932 deprecated = strchr(p, ':') != NULL;
934 if (!strcmp(filter->filter->name, "aevalsrc")) {
936 while ((p = strchr(p, ':')) && p[1] != ':') {
937 const char *epos = strchr(p + 1, '=');
938 const char *spos = strchr(p + 1, ':');
939 const int next_token_is_opt = epos && (!spos || epos < spos);
940 if (next_token_is_opt) {
944 /* next token does not contain a '=', assume a channel expression */
948 if (p && *p == ':') { // double sep '::' found
950 memmove(p, p + 1, strlen(p));
953 while ((p = strchr(p, ':')))
957 av_log(filter, AV_LOG_WARNING, "This syntax is deprecated. Use "
958 "'|' to separate the list items.\n");
960 av_log(filter, AV_LOG_DEBUG, "compat: called with args=[%s]\n", copy);
961 ret = process_options(filter, &options, copy);
968 ret = process_options(filter, &options, args);
974 ret = avfilter_init_dict(filter, &options);
978 if ((e = av_dict_get(options, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
979 av_log(filter, AV_LOG_ERROR, "No such option: %s.\n", e->key);
980 ret = AVERROR_OPTION_NOT_FOUND;
985 av_dict_free(&options);
990 const char *avfilter_pad_get_name(const AVFilterPad *pads, int pad_idx)
992 return pads[pad_idx].name;
995 enum AVMediaType avfilter_pad_get_type(const AVFilterPad *pads, int pad_idx)
997 return pads[pad_idx].type;
1000 static int default_filter_frame(AVFilterLink *link, AVFrame *frame)
1002 return ff_filter_frame(link->dst->outputs[0], frame);
1005 static int ff_filter_frame_framed(AVFilterLink *link, AVFrame *frame)
1007 int (*filter_frame)(AVFilterLink *, AVFrame *);
1008 AVFilterContext *dstctx = link->dst;
1009 AVFilterPad *dst = link->dstpad;
1010 AVFrame *out = NULL;
1012 AVFilterCommand *cmd= link->dst->command_queue;
1016 av_frame_free(&frame);
1020 if (!(filter_frame = dst->filter_frame))
1021 filter_frame = default_filter_frame;
1023 /* copy the frame if needed */
1024 if (dst->needs_writable && !av_frame_is_writable(frame)) {
1025 av_log(link->dst, AV_LOG_DEBUG, "Copying data in avfilter.\n");
1027 /* Maybe use ff_copy_buffer_ref instead? */
1028 switch (link->type) {
1029 case AVMEDIA_TYPE_VIDEO:
1030 out = ff_get_video_buffer(link, link->w, link->h);
1032 case AVMEDIA_TYPE_AUDIO:
1033 out = ff_get_audio_buffer(link, frame->nb_samples);
1036 ret = AVERROR(EINVAL);
1040 ret = AVERROR(ENOMEM);
1044 ret = av_frame_copy_props(out, frame);
1048 switch (link->type) {
1049 case AVMEDIA_TYPE_VIDEO:
1050 av_image_copy(out->data, out->linesize, (const uint8_t **)frame->data, frame->linesize,
1051 frame->format, frame->width, frame->height);
1053 case AVMEDIA_TYPE_AUDIO:
1054 av_samples_copy(out->extended_data, frame->extended_data,
1055 0, 0, frame->nb_samples,
1056 av_get_channel_layout_nb_channels(frame->channel_layout),
1060 ret = AVERROR(EINVAL);
1064 av_frame_free(&frame);
1068 while(cmd && cmd->time <= out->pts * av_q2d(link->time_base)){
1069 av_log(link->dst, AV_LOG_DEBUG,
1070 "Processing command time:%f command:%s arg:%s\n",
1071 cmd->time, cmd->command, cmd->arg);
1072 avfilter_process_command(link->dst, cmd->command, cmd->arg, 0, 0, cmd->flags);
1073 ff_command_queue_pop(link->dst);
1074 cmd= link->dst->command_queue;
1078 if (dstctx->enable_str) {
1079 int64_t pos = av_frame_get_pkt_pos(out);
1080 dstctx->var_values[VAR_N] = link->frame_count;
1081 dstctx->var_values[VAR_T] = pts == AV_NOPTS_VALUE ? NAN : pts * av_q2d(link->time_base);
1082 dstctx->var_values[VAR_W] = link->w;
1083 dstctx->var_values[VAR_H] = link->h;
1084 dstctx->var_values[VAR_POS] = pos == -1 ? NAN : pos;
1086 dstctx->is_disabled = fabs(av_expr_eval(dstctx->enable, dstctx->var_values, NULL)) < 0.5;
1087 if (dstctx->is_disabled &&
1088 (dstctx->filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC))
1089 filter_frame = default_filter_frame;
1091 ret = filter_frame(link, out);
1092 link->frame_count++;
1093 link->frame_requested = 0;
1094 ff_update_link_current_pts(link, pts);
1098 av_frame_free(&out);
1099 av_frame_free(&frame);
1103 static int ff_filter_frame_needs_framing(AVFilterLink *link, AVFrame *frame)
1105 int insamples = frame->nb_samples, inpos = 0, nb_samples;
1106 AVFrame *pbuf = link->partial_buf;
1107 int nb_channels = av_frame_get_channels(frame);
1110 link->flags |= FF_LINK_FLAG_REQUEST_LOOP;
1111 /* Handle framing (min_samples, max_samples) */
1114 AVRational samples_tb = { 1, link->sample_rate };
1115 pbuf = ff_get_audio_buffer(link, link->partial_buf_size);
1117 av_log(link->dst, AV_LOG_WARNING,
1118 "Samples dropped due to memory allocation failure.\n");
1121 av_frame_copy_props(pbuf, frame);
1122 pbuf->pts = frame->pts;
1123 if (pbuf->pts != AV_NOPTS_VALUE)
1124 pbuf->pts += av_rescale_q(inpos, samples_tb, link->time_base);
1125 pbuf->nb_samples = 0;
1127 nb_samples = FFMIN(insamples,
1128 link->partial_buf_size - pbuf->nb_samples);
1129 av_samples_copy(pbuf->extended_data, frame->extended_data,
1130 pbuf->nb_samples, inpos,
1131 nb_samples, nb_channels, link->format);
1132 inpos += nb_samples;
1133 insamples -= nb_samples;
1134 pbuf->nb_samples += nb_samples;
1135 if (pbuf->nb_samples >= link->min_samples) {
1136 ret = ff_filter_frame_framed(link, pbuf);
1140 av_frame_free(&frame);
1141 link->partial_buf = pbuf;
1145 int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
1147 FF_TPRINTF_START(NULL, filter_frame); ff_tlog_link(NULL, link, 1); ff_tlog(NULL, " "); ff_tlog_ref(NULL, frame, 1);
1149 /* Consistency checks */
1150 if (link->type == AVMEDIA_TYPE_VIDEO) {
1151 if (strcmp(link->dst->filter->name, "scale") &&
1152 strcmp(link->dst->filter->name, "idet")) {
1153 av_assert1(frame->format == link->format);
1154 av_assert1(frame->width == link->w);
1155 av_assert1(frame->height == link->h);
1158 av_assert1(frame->format == link->format);
1159 av_assert1(av_frame_get_channels(frame) == link->channels);
1160 av_assert1(frame->channel_layout == link->channel_layout);
1161 av_assert1(frame->sample_rate == link->sample_rate);
1164 /* Go directly to actual filtering if possible */
1165 if (link->type == AVMEDIA_TYPE_AUDIO &&
1166 link->min_samples &&
1167 (link->partial_buf ||
1168 frame->nb_samples < link->min_samples ||
1169 frame->nb_samples > link->max_samples)) {
1170 return ff_filter_frame_needs_framing(link, frame);
1172 return ff_filter_frame_framed(link, frame);
1176 const AVClass *avfilter_get_class(void)
1178 return &avfilter_class;