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);
171 ff_video_frame_pool_uninit((FFVideoFramePool**)&(*link)->video_frame_pool);
176 int avfilter_link_get_channels(AVFilterLink *link)
178 return link->channels;
181 void avfilter_link_set_closed(AVFilterLink *link, int closed)
183 link->closed = closed;
186 int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
187 unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
190 unsigned dstpad_idx = link->dstpad - link->dst->input_pads;
192 av_log(link->dst, AV_LOG_VERBOSE, "auto-inserting filter '%s' "
193 "between the filter '%s' and the filter '%s'\n",
194 filt->name, link->src->name, link->dst->name);
196 link->dst->inputs[dstpad_idx] = NULL;
197 if ((ret = avfilter_link(filt, filt_dstpad_idx, link->dst, dstpad_idx)) < 0) {
198 /* failed to link output filter to new filter */
199 link->dst->inputs[dstpad_idx] = link;
203 /* re-hookup the link to the new destination filter we inserted */
205 link->dstpad = &filt->input_pads[filt_srcpad_idx];
206 filt->inputs[filt_srcpad_idx] = link;
208 /* if any information on supported media formats already exists on the
209 * link, we need to preserve that */
210 if (link->out_formats)
211 ff_formats_changeref(&link->out_formats,
212 &filt->outputs[filt_dstpad_idx]->out_formats);
213 if (link->out_samplerates)
214 ff_formats_changeref(&link->out_samplerates,
215 &filt->outputs[filt_dstpad_idx]->out_samplerates);
216 if (link->out_channel_layouts)
217 ff_channel_layouts_changeref(&link->out_channel_layouts,
218 &filt->outputs[filt_dstpad_idx]->out_channel_layouts);
223 int avfilter_config_links(AVFilterContext *filter)
225 int (*config_link)(AVFilterLink *);
229 for (i = 0; i < filter->nb_inputs; i ++) {
230 AVFilterLink *link = filter->inputs[i];
231 AVFilterLink *inlink;
234 if (!link->src || !link->dst) {
235 av_log(filter, AV_LOG_ERROR,
236 "Not all input and output are properly linked (%d).\n", i);
237 return AVERROR(EINVAL);
240 inlink = link->src->nb_inputs ? link->src->inputs[0] : NULL;
242 link->current_pts_us = AV_NOPTS_VALUE;
244 switch (link->init_state) {
247 case AVLINK_STARTINIT:
248 av_log(filter, AV_LOG_INFO, "circular filter chain detected\n");
251 link->init_state = AVLINK_STARTINIT;
253 if ((ret = avfilter_config_links(link->src)) < 0)
256 if (!(config_link = link->srcpad->config_props)) {
257 if (link->src->nb_inputs != 1) {
258 av_log(link->src, AV_LOG_ERROR, "Source filters and filters "
259 "with more than one input "
260 "must set config_props() "
261 "callbacks on all outputs\n");
262 return AVERROR(EINVAL);
264 } else if ((ret = config_link(link)) < 0) {
265 av_log(link->src, AV_LOG_ERROR,
266 "Failed to configure output pad on %s\n",
271 switch (link->type) {
272 case AVMEDIA_TYPE_VIDEO:
273 if (!link->time_base.num && !link->time_base.den)
274 link->time_base = inlink ? inlink->time_base : AV_TIME_BASE_Q;
276 if (!link->sample_aspect_ratio.num && !link->sample_aspect_ratio.den)
277 link->sample_aspect_ratio = inlink ?
278 inlink->sample_aspect_ratio : (AVRational){1,1};
281 if (!link->frame_rate.num && !link->frame_rate.den)
282 link->frame_rate = inlink->frame_rate;
287 } else if (!link->w || !link->h) {
288 av_log(link->src, AV_LOG_ERROR,
289 "Video source filters must set their output link's "
290 "width and height\n");
291 return AVERROR(EINVAL);
295 case AVMEDIA_TYPE_AUDIO:
297 if (!link->time_base.num && !link->time_base.den)
298 link->time_base = inlink->time_base;
301 if (!link->time_base.num && !link->time_base.den)
302 link->time_base = (AVRational) {1, link->sample_rate};
305 if ((config_link = link->dstpad->config_props))
306 if ((ret = config_link(link)) < 0) {
307 av_log(link->dst, AV_LOG_ERROR,
308 "Failed to configure input pad on %s\n",
313 link->init_state = AVLINK_INIT;
320 void ff_tlog_link(void *ctx, AVFilterLink *link, int end)
322 if (link->type == AVMEDIA_TYPE_VIDEO) {
324 "link[%p s:%dx%d fmt:%s %s->%s]%s",
325 link, link->w, link->h,
326 av_get_pix_fmt_name(link->format),
327 link->src ? link->src->filter->name : "",
328 link->dst ? link->dst->filter->name : "",
332 av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);
335 "link[%p r:%d cl:%s fmt:%s %s->%s]%s",
336 link, (int)link->sample_rate, buf,
337 av_get_sample_fmt_name(link->format),
338 link->src ? link->src->filter->name : "",
339 link->dst ? link->dst->filter->name : "",
344 int ff_request_frame(AVFilterLink *link)
347 FF_TPRINTF_START(NULL, request_frame); ff_tlog_link(NULL, link, 1);
351 if (link->srcpad->request_frame)
352 ret = link->srcpad->request_frame(link);
353 else if (link->src->inputs[0])
354 ret = ff_request_frame(link->src->inputs[0]);
355 if (ret == AVERROR_EOF && link->partial_buf) {
356 AVFrame *pbuf = link->partial_buf;
357 link->partial_buf = NULL;
358 ret = ff_filter_frame_framed(link, pbuf);
361 if (ret == AVERROR_EOF)
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])
377 return AVERROR(EINVAL);
378 val = ff_poll_frame(link->src->inputs[i]);
379 min = FFMIN(min, val);
385 static const char *const var_names[] = {
403 static int set_enable_expr(AVFilterContext *ctx, const char *expr)
407 AVExpr *old = ctx->enable;
409 if (!(ctx->filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE)) {
410 av_log(ctx, AV_LOG_ERROR, "Timeline ('enable' option) not supported "
411 "with filter '%s'\n", ctx->filter->name);
412 return AVERROR_PATCHWELCOME;
415 expr_dup = av_strdup(expr);
417 return AVERROR(ENOMEM);
419 if (!ctx->var_values) {
420 ctx->var_values = av_calloc(VAR_VARS_NB, sizeof(*ctx->var_values));
421 if (!ctx->var_values) {
423 return AVERROR(ENOMEM);
427 ret = av_expr_parse((AVExpr**)&ctx->enable, expr_dup, var_names,
428 NULL, NULL, NULL, NULL, 0, ctx->priv);
430 av_log(ctx->priv, AV_LOG_ERROR,
431 "Error when evaluating the expression '%s' for enable\n",
438 av_free(ctx->enable_str);
439 ctx->enable_str = expr_dup;
443 void ff_update_link_current_pts(AVFilterLink *link, int64_t pts)
445 if (pts == AV_NOPTS_VALUE)
447 link->current_pts = pts;
448 link->current_pts_us = av_rescale_q(pts, link->time_base, AV_TIME_BASE_Q);
449 /* TODO use duration */
450 if (link->graph && link->age_index >= 0)
451 ff_avfilter_graph_update_heap(link->graph, link);
454 int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags)
456 if(!strcmp(cmd, "ping")){
457 char local_res[256] = {0};
461 res_len = sizeof(local_res);
463 av_strlcatf(res, res_len, "pong from:%s %s\n", filter->filter->name, filter->name);
464 if (res == local_res)
465 av_log(filter, AV_LOG_INFO, "%s", res);
467 }else if(!strcmp(cmd, "enable")) {
468 return set_enable_expr(filter, arg);
469 }else if(filter->filter->process_command) {
470 return filter->filter->process_command(filter, cmd, arg, res, res_len, flags);
472 return AVERROR(ENOSYS);
475 static AVFilter *first_filter;
476 static AVFilter **last_filter = &first_filter;
478 #if !FF_API_NOCONST_GET_NAME
481 AVFilter *avfilter_get_by_name(const char *name)
483 const AVFilter *f = NULL;
488 while ((f = avfilter_next(f)))
489 if (!strcmp(f->name, name))
490 return (AVFilter *)f;
495 int avfilter_register(AVFilter *filter)
497 AVFilter **f = last_filter;
499 /* the filter must select generic or internal exclusively */
500 av_assert0((filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE) != AVFILTER_FLAG_SUPPORT_TIMELINE);
504 while(*f || avpriv_atomic_ptr_cas((void * volatile *)f, NULL, filter))
506 last_filter = &filter->next;
511 const AVFilter *avfilter_next(const AVFilter *prev)
513 return prev ? prev->next : first_filter;
516 #if FF_API_OLD_FILTER_REGISTER
517 AVFilter **av_filter_next(AVFilter **filter)
519 return filter ? &(*filter)->next : &first_filter;
522 void avfilter_uninit(void)
527 int avfilter_pad_count(const AVFilterPad *pads)
534 for (count = 0; pads->name; count++)
539 static const char *default_filter_name(void *filter_ctx)
541 AVFilterContext *ctx = filter_ctx;
542 return ctx->name ? ctx->name : ctx->filter->name;
545 static void *filter_child_next(void *obj, void *prev)
547 AVFilterContext *ctx = obj;
548 if (!prev && ctx->filter && ctx->filter->priv_class && ctx->priv)
553 static const AVClass *filter_child_class_next(const AVClass *prev)
555 const AVFilter *f = NULL;
557 /* find the filter that corresponds to prev */
558 while (prev && (f = avfilter_next(f)))
559 if (f->priv_class == prev)
562 /* could not find filter corresponding to prev */
566 /* find next filter with specific options */
567 while ((f = avfilter_next(f)))
569 return f->priv_class;
574 #define OFFSET(x) offsetof(AVFilterContext, x)
575 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM
576 static const AVOption avfilter_options[] = {
577 { "thread_type", "Allowed thread types", OFFSET(thread_type), AV_OPT_TYPE_FLAGS,
578 { .i64 = AVFILTER_THREAD_SLICE }, 0, INT_MAX, FLAGS, "thread_type" },
579 { "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .unit = "thread_type" },
580 { "enable", "set enable expression", OFFSET(enable_str), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
584 static const AVClass avfilter_class = {
585 .class_name = "AVFilter",
586 .item_name = default_filter_name,
587 .version = LIBAVUTIL_VERSION_INT,
588 .category = AV_CLASS_CATEGORY_FILTER,
589 .child_next = filter_child_next,
590 .child_class_next = filter_child_class_next,
591 .option = avfilter_options,
594 static int default_execute(AVFilterContext *ctx, avfilter_action_func *func, void *arg,
595 int *ret, int nb_jobs)
599 for (i = 0; i < nb_jobs; i++) {
600 int r = func(ctx, arg, i, nb_jobs);
607 AVFilterContext *ff_filter_alloc(const AVFilter *filter, const char *inst_name)
609 AVFilterContext *ret;
614 ret = av_mallocz(sizeof(AVFilterContext));
618 ret->av_class = &avfilter_class;
619 ret->filter = filter;
620 ret->name = inst_name ? av_strdup(inst_name) : NULL;
621 if (filter->priv_size) {
622 ret->priv = av_mallocz(filter->priv_size);
627 av_opt_set_defaults(ret);
628 if (filter->priv_class) {
629 *(const AVClass**)ret->priv = filter->priv_class;
630 av_opt_set_defaults(ret->priv);
633 ret->internal = av_mallocz(sizeof(*ret->internal));
636 ret->internal->execute = default_execute;
638 ret->nb_inputs = avfilter_pad_count(filter->inputs);
639 if (ret->nb_inputs ) {
640 ret->input_pads = av_malloc_array(ret->nb_inputs, sizeof(AVFilterPad));
641 if (!ret->input_pads)
643 memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->nb_inputs);
644 ret->inputs = av_mallocz_array(ret->nb_inputs, sizeof(AVFilterLink*));
649 ret->nb_outputs = avfilter_pad_count(filter->outputs);
650 if (ret->nb_outputs) {
651 ret->output_pads = av_malloc_array(ret->nb_outputs, sizeof(AVFilterPad));
652 if (!ret->output_pads)
654 memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->nb_outputs);
655 ret->outputs = av_mallocz_array(ret->nb_outputs, sizeof(AVFilterLink*));
663 av_freep(&ret->inputs);
664 av_freep(&ret->input_pads);
666 av_freep(&ret->outputs);
667 av_freep(&ret->output_pads);
669 av_freep(&ret->priv);
670 av_freep(&ret->internal);
675 #if FF_API_AVFILTER_OPEN
676 int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
678 *filter_ctx = ff_filter_alloc(filter, inst_name);
679 return *filter_ctx ? 0 : AVERROR(ENOMEM);
683 static void free_link(AVFilterLink *link)
689 link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
691 link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
693 ff_formats_unref(&link->in_formats);
694 ff_formats_unref(&link->out_formats);
695 ff_formats_unref(&link->in_samplerates);
696 ff_formats_unref(&link->out_samplerates);
697 ff_channel_layouts_unref(&link->in_channel_layouts);
698 ff_channel_layouts_unref(&link->out_channel_layouts);
699 avfilter_link_free(&link);
702 void avfilter_free(AVFilterContext *filter)
710 ff_filter_graph_remove_filter(filter->graph, filter);
712 if (filter->filter->uninit)
713 filter->filter->uninit(filter);
715 for (i = 0; i < filter->nb_inputs; i++) {
716 free_link(filter->inputs[i]);
718 for (i = 0; i < filter->nb_outputs; i++) {
719 free_link(filter->outputs[i]);
722 if (filter->filter->priv_class)
723 av_opt_free(filter->priv);
725 av_freep(&filter->name);
726 av_freep(&filter->input_pads);
727 av_freep(&filter->output_pads);
728 av_freep(&filter->inputs);
729 av_freep(&filter->outputs);
730 av_freep(&filter->priv);
731 while(filter->command_queue){
732 ff_command_queue_pop(filter);
735 av_expr_free(filter->enable);
736 filter->enable = NULL;
737 av_freep(&filter->var_values);
738 av_freep(&filter->internal);
742 static int process_options(AVFilterContext *ctx, AVDictionary **options,
745 const AVOption *o = NULL;
747 char *av_uninit(parsed_key), *av_uninit(value);
755 const char *shorthand = NULL;
757 o = av_opt_next(ctx->priv, o);
759 if (o->type == AV_OPT_TYPE_CONST || o->offset == offset)
765 ret = av_opt_get_key_value(&args, "=", ":",
766 shorthand ? AV_OPT_FLAG_IMPLICIT_KEY : 0,
767 &parsed_key, &value);
769 if (ret == AVERROR(EINVAL))
770 av_log(ctx, AV_LOG_ERROR, "No option name near '%s'\n", args);
772 av_log(ctx, AV_LOG_ERROR, "Unable to parse '%s': %s\n", args,
780 while ((o = av_opt_next(ctx->priv, o))); /* discard all remaining shorthand */
785 av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value);
787 if (av_opt_find(ctx, key, NULL, 0, 0)) {
788 ret = av_opt_set(ctx, key, value, 0);
795 av_dict_set(options, key, value, 0);
796 if ((ret = av_opt_set(ctx->priv, key, value, 0)) < 0) {
797 if (!av_opt_find(ctx->priv, key, NULL, 0, AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ)) {
798 if (ret == AVERROR_OPTION_NOT_FOUND)
799 av_log(ctx, AV_LOG_ERROR, "Option '%s' not found\n", key);
812 if (ctx->enable_str) {
813 ret = set_enable_expr(ctx, ctx->enable_str);
820 #if FF_API_AVFILTER_INIT_FILTER
821 int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
823 return avfilter_init_str(filter, args);
827 int avfilter_init_dict(AVFilterContext *ctx, AVDictionary **options)
831 ret = av_opt_set_dict(ctx, options);
833 av_log(ctx, AV_LOG_ERROR, "Error applying generic filter options.\n");
837 if (ctx->filter->flags & AVFILTER_FLAG_SLICE_THREADS &&
838 ctx->thread_type & ctx->graph->thread_type & AVFILTER_THREAD_SLICE &&
839 ctx->graph->internal->thread_execute) {
840 ctx->thread_type = AVFILTER_THREAD_SLICE;
841 ctx->internal->execute = ctx->graph->internal->thread_execute;
843 ctx->thread_type = 0;
846 if (ctx->filter->priv_class) {
847 ret = av_opt_set_dict(ctx->priv, options);
849 av_log(ctx, AV_LOG_ERROR, "Error applying options to the filter.\n");
854 if (ctx->filter->init_opaque)
855 ret = ctx->filter->init_opaque(ctx, NULL);
856 else if (ctx->filter->init)
857 ret = ctx->filter->init(ctx);
858 else if (ctx->filter->init_dict)
859 ret = ctx->filter->init_dict(ctx, options);
864 int avfilter_init_str(AVFilterContext *filter, const char *args)
866 AVDictionary *options = NULL;
867 AVDictionaryEntry *e;
871 if (!filter->filter->priv_class) {
872 av_log(filter, AV_LOG_ERROR, "This filter does not take any "
873 "options, but options were provided: %s.\n", args);
874 return AVERROR(EINVAL);
877 #if FF_API_OLD_FILTER_OPTS || FF_API_OLD_FILTER_OPTS_ERROR
878 if ( !strcmp(filter->filter->name, "format") ||
879 !strcmp(filter->filter->name, "noformat") ||
880 !strcmp(filter->filter->name, "frei0r") ||
881 !strcmp(filter->filter->name, "frei0r_src") ||
882 !strcmp(filter->filter->name, "ocv") ||
883 !strcmp(filter->filter->name, "pan") ||
884 !strcmp(filter->filter->name, "pp") ||
885 !strcmp(filter->filter->name, "aevalsrc")) {
886 /* a hack for compatibility with the old syntax
887 * replace colons with |s */
888 char *copy = av_strdup(args);
890 int nb_leading = 0; // number of leading colons to skip
894 ret = AVERROR(ENOMEM);
898 if (!strcmp(filter->filter->name, "frei0r") ||
899 !strcmp(filter->filter->name, "ocv"))
901 else if (!strcmp(filter->filter->name, "frei0r_src"))
904 while (nb_leading--) {
907 p = copy + strlen(copy);
913 deprecated = strchr(p, ':') != NULL;
915 if (!strcmp(filter->filter->name, "aevalsrc")) {
917 while ((p = strchr(p, ':')) && p[1] != ':') {
918 const char *epos = strchr(p + 1, '=');
919 const char *spos = strchr(p + 1, ':');
920 const int next_token_is_opt = epos && (!spos || epos < spos);
921 if (next_token_is_opt) {
925 /* next token does not contain a '=', assume a channel expression */
929 if (p && *p == ':') { // double sep '::' found
931 memmove(p, p + 1, strlen(p));
934 while ((p = strchr(p, ':')))
937 #if FF_API_OLD_FILTER_OPTS
939 av_log(filter, AV_LOG_WARNING, "This syntax is deprecated. Use "
940 "'|' to separate the list items.\n");
942 av_log(filter, AV_LOG_DEBUG, "compat: called with args=[%s]\n", copy);
943 ret = process_options(filter, &options, copy);
946 av_log(filter, AV_LOG_ERROR, "This syntax is deprecated. Use "
947 "'|' to separate the list items ('%s' instead of '%s')\n",
949 ret = AVERROR(EINVAL);
951 ret = process_options(filter, &options, copy);
961 ret = process_options(filter, &options, args);
967 ret = avfilter_init_dict(filter, &options);
971 if ((e = av_dict_get(options, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
972 av_log(filter, AV_LOG_ERROR, "No such option: %s.\n", e->key);
973 ret = AVERROR_OPTION_NOT_FOUND;
978 av_dict_free(&options);
983 const char *avfilter_pad_get_name(const AVFilterPad *pads, int pad_idx)
985 return pads[pad_idx].name;
988 enum AVMediaType avfilter_pad_get_type(const AVFilterPad *pads, int pad_idx)
990 return pads[pad_idx].type;
993 static int default_filter_frame(AVFilterLink *link, AVFrame *frame)
995 return ff_filter_frame(link->dst->outputs[0], frame);
998 static int ff_filter_frame_framed(AVFilterLink *link, AVFrame *frame)
1000 int (*filter_frame)(AVFilterLink *, AVFrame *);
1001 AVFilterContext *dstctx = link->dst;
1002 AVFilterPad *dst = link->dstpad;
1003 AVFrame *out = NULL;
1005 AVFilterCommand *cmd= link->dst->command_queue;
1009 av_frame_free(&frame);
1013 if (!(filter_frame = dst->filter_frame))
1014 filter_frame = default_filter_frame;
1016 /* copy the frame if needed */
1017 if (dst->needs_writable && !av_frame_is_writable(frame)) {
1018 av_log(link->dst, AV_LOG_DEBUG, "Copying data in avfilter.\n");
1020 switch (link->type) {
1021 case AVMEDIA_TYPE_VIDEO:
1022 out = ff_get_video_buffer(link, link->w, link->h);
1024 case AVMEDIA_TYPE_AUDIO:
1025 out = ff_get_audio_buffer(link, frame->nb_samples);
1028 ret = AVERROR(EINVAL);
1032 ret = AVERROR(ENOMEM);
1036 ret = av_frame_copy_props(out, frame);
1040 switch (link->type) {
1041 case AVMEDIA_TYPE_VIDEO:
1042 av_image_copy(out->data, out->linesize, (const uint8_t **)frame->data, frame->linesize,
1043 frame->format, frame->width, frame->height);
1045 case AVMEDIA_TYPE_AUDIO:
1046 av_samples_copy(out->extended_data, frame->extended_data,
1047 0, 0, frame->nb_samples,
1048 av_get_channel_layout_nb_channels(frame->channel_layout),
1052 ret = AVERROR(EINVAL);
1056 av_frame_free(&frame);
1060 while(cmd && cmd->time <= out->pts * av_q2d(link->time_base)){
1061 av_log(link->dst, AV_LOG_DEBUG,
1062 "Processing command time:%f command:%s arg:%s\n",
1063 cmd->time, cmd->command, cmd->arg);
1064 avfilter_process_command(link->dst, cmd->command, cmd->arg, 0, 0, cmd->flags);
1065 ff_command_queue_pop(link->dst);
1066 cmd= link->dst->command_queue;
1070 if (dstctx->enable_str) {
1071 int64_t pos = av_frame_get_pkt_pos(out);
1072 dstctx->var_values[VAR_N] = link->frame_count;
1073 dstctx->var_values[VAR_T] = pts == AV_NOPTS_VALUE ? NAN : pts * av_q2d(link->time_base);
1074 dstctx->var_values[VAR_W] = link->w;
1075 dstctx->var_values[VAR_H] = link->h;
1076 dstctx->var_values[VAR_POS] = pos == -1 ? NAN : pos;
1078 dstctx->is_disabled = fabs(av_expr_eval(dstctx->enable, dstctx->var_values, NULL)) < 0.5;
1079 if (dstctx->is_disabled &&
1080 (dstctx->filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC))
1081 filter_frame = default_filter_frame;
1083 ret = filter_frame(link, out);
1084 link->frame_count++;
1085 ff_update_link_current_pts(link, pts);
1089 av_frame_free(&out);
1090 av_frame_free(&frame);
1094 static int ff_filter_frame_needs_framing(AVFilterLink *link, AVFrame *frame)
1096 int insamples = frame->nb_samples, inpos = 0, nb_samples;
1097 AVFrame *pbuf = link->partial_buf;
1098 int nb_channels = av_frame_get_channels(frame);
1101 /* Handle framing (min_samples, max_samples) */
1104 AVRational samples_tb = { 1, link->sample_rate };
1105 pbuf = ff_get_audio_buffer(link, link->partial_buf_size);
1107 av_log(link->dst, AV_LOG_WARNING,
1108 "Samples dropped due to memory allocation failure.\n");
1111 av_frame_copy_props(pbuf, frame);
1112 pbuf->pts = frame->pts;
1113 if (pbuf->pts != AV_NOPTS_VALUE)
1114 pbuf->pts += av_rescale_q(inpos, samples_tb, link->time_base);
1115 pbuf->nb_samples = 0;
1117 nb_samples = FFMIN(insamples,
1118 link->partial_buf_size - pbuf->nb_samples);
1119 av_samples_copy(pbuf->extended_data, frame->extended_data,
1120 pbuf->nb_samples, inpos,
1121 nb_samples, nb_channels, link->format);
1122 inpos += nb_samples;
1123 insamples -= nb_samples;
1124 pbuf->nb_samples += nb_samples;
1125 if (pbuf->nb_samples >= link->min_samples) {
1126 ret = ff_filter_frame_framed(link, pbuf);
1130 av_frame_free(&frame);
1131 link->partial_buf = pbuf;
1135 int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
1137 FF_TPRINTF_START(NULL, filter_frame); ff_tlog_link(NULL, link, 1); ff_tlog(NULL, " "); ff_tlog_ref(NULL, frame, 1);
1139 /* Consistency checks */
1140 if (link->type == AVMEDIA_TYPE_VIDEO) {
1141 if (strcmp(link->dst->filter->name, "buffersink") &&
1142 strcmp(link->dst->filter->name, "format") &&
1143 strcmp(link->dst->filter->name, "idet") &&
1144 strcmp(link->dst->filter->name, "null") &&
1145 strcmp(link->dst->filter->name, "scale")) {
1146 av_assert1(frame->format == link->format);
1147 av_assert1(frame->width == link->w);
1148 av_assert1(frame->height == link->h);
1151 if (frame->format != link->format) {
1152 av_log(link->dst, AV_LOG_ERROR, "Format change is not supported\n");
1155 if (av_frame_get_channels(frame) != link->channels) {
1156 av_log(link->dst, AV_LOG_ERROR, "Channel count change is not supported\n");
1159 if (frame->channel_layout != link->channel_layout) {
1160 av_log(link->dst, AV_LOG_ERROR, "Channel layout change is not supported\n");
1163 if (frame->sample_rate != link->sample_rate) {
1164 av_log(link->dst, AV_LOG_ERROR, "Sample rate change is not supported\n");
1169 /* Go directly to actual filtering if possible */
1170 if (link->type == AVMEDIA_TYPE_AUDIO &&
1171 link->min_samples &&
1172 (link->partial_buf ||
1173 frame->nb_samples < link->min_samples ||
1174 frame->nb_samples > link->max_samples)) {
1175 return ff_filter_frame_needs_framing(link, frame);
1177 return ff_filter_frame_framed(link, frame);
1180 av_frame_free(&frame);
1181 return AVERROR_PATCHWELCOME;
1184 const AVClass *avfilter_get_class(void)
1186 return &avfilter_class;