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};
279 if (!link->frame_rate.num && !link->frame_rate.den)
280 link->frame_rate = inlink->frame_rate;
285 } else if (!link->w || !link->h) {
286 av_log(link->src, AV_LOG_ERROR,
287 "Video source filters must set their output link's "
288 "width and height\n");
289 return AVERROR(EINVAL);
293 case AVMEDIA_TYPE_AUDIO:
295 if (!link->time_base.num && !link->time_base.den)
296 link->time_base = inlink->time_base;
299 if (!link->time_base.num && !link->time_base.den)
300 link->time_base = (AVRational) {1, link->sample_rate};
303 if ((config_link = link->dstpad->config_props))
304 if ((ret = config_link(link)) < 0) {
305 av_log(link->dst, AV_LOG_ERROR,
306 "Failed to configure input pad on %s\n",
311 link->init_state = AVLINK_INIT;
318 void ff_tlog_link(void *ctx, AVFilterLink *link, int end)
320 if (link->type == AVMEDIA_TYPE_VIDEO) {
322 "link[%p s:%dx%d fmt:%s %s->%s]%s",
323 link, link->w, link->h,
324 av_get_pix_fmt_name(link->format),
325 link->src ? link->src->filter->name : "",
326 link->dst ? link->dst->filter->name : "",
330 av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);
333 "link[%p r:%d cl:%s fmt:%s %s->%s]%s",
334 link, (int)link->sample_rate, buf,
335 av_get_sample_fmt_name(link->format),
336 link->src ? link->src->filter->name : "",
337 link->dst ? link->dst->filter->name : "",
342 int ff_request_frame(AVFilterLink *link)
345 FF_TPRINTF_START(NULL, request_frame); ff_tlog_link(NULL, link, 1);
349 if (link->srcpad->request_frame)
350 ret = link->srcpad->request_frame(link);
351 else if (link->src->inputs[0])
352 ret = ff_request_frame(link->src->inputs[0]);
353 if (ret == AVERROR_EOF && link->partial_buf) {
354 AVFrame *pbuf = link->partial_buf;
355 link->partial_buf = NULL;
356 ret = ff_filter_frame_framed(link, pbuf);
359 if (ret == AVERROR_EOF)
365 int ff_poll_frame(AVFilterLink *link)
367 int i, min = INT_MAX;
369 if (link->srcpad->poll_frame)
370 return link->srcpad->poll_frame(link);
372 for (i = 0; i < link->src->nb_inputs; i++) {
374 if (!link->src->inputs[i])
375 return AVERROR(EINVAL);
376 val = ff_poll_frame(link->src->inputs[i]);
377 min = FFMIN(min, val);
383 static const char *const var_names[] = {
401 static int set_enable_expr(AVFilterContext *ctx, const char *expr)
405 AVExpr *old = ctx->enable;
407 if (!(ctx->filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE)) {
408 av_log(ctx, AV_LOG_ERROR, "Timeline ('enable' option) not supported "
409 "with filter '%s'\n", ctx->filter->name);
410 return AVERROR_PATCHWELCOME;
413 expr_dup = av_strdup(expr);
415 return AVERROR(ENOMEM);
417 if (!ctx->var_values) {
418 ctx->var_values = av_calloc(VAR_VARS_NB, sizeof(*ctx->var_values));
419 if (!ctx->var_values) {
421 return AVERROR(ENOMEM);
425 ret = av_expr_parse((AVExpr**)&ctx->enable, expr_dup, var_names,
426 NULL, NULL, NULL, NULL, 0, ctx->priv);
428 av_log(ctx->priv, AV_LOG_ERROR,
429 "Error when evaluating the expression '%s' for enable\n",
436 av_free(ctx->enable_str);
437 ctx->enable_str = expr_dup;
441 void ff_update_link_current_pts(AVFilterLink *link, int64_t pts)
443 if (pts == AV_NOPTS_VALUE)
445 link->current_pts = av_rescale_q(pts, link->time_base, AV_TIME_BASE_Q);
446 /* TODO use duration */
447 if (link->graph && link->age_index >= 0)
448 ff_avfilter_graph_update_heap(link->graph, link);
451 int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags)
453 if(!strcmp(cmd, "ping")){
454 char local_res[256] = {0};
458 res_len = sizeof(local_res);
460 av_strlcatf(res, res_len, "pong from:%s %s\n", filter->filter->name, filter->name);
461 if (res == local_res)
462 av_log(filter, AV_LOG_INFO, "%s", res);
464 }else if(!strcmp(cmd, "enable")) {
465 return set_enable_expr(filter, arg);
466 }else if(filter->filter->process_command) {
467 return filter->filter->process_command(filter, cmd, arg, res, res_len, flags);
469 return AVERROR(ENOSYS);
472 static AVFilter *first_filter;
473 static AVFilter **last_filter = &first_filter;
475 #if !FF_API_NOCONST_GET_NAME
478 AVFilter *avfilter_get_by_name(const char *name)
480 const AVFilter *f = NULL;
485 while ((f = avfilter_next(f)))
486 if (!strcmp(f->name, name))
487 return (AVFilter *)f;
492 int avfilter_register(AVFilter *filter)
494 AVFilter **f = last_filter;
496 /* the filter must select generic or internal exclusively */
497 av_assert0((filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE) != AVFILTER_FLAG_SUPPORT_TIMELINE);
501 while(*f || avpriv_atomic_ptr_cas((void * volatile *)f, NULL, filter))
503 last_filter = &filter->next;
508 const AVFilter *avfilter_next(const AVFilter *prev)
510 return prev ? prev->next : first_filter;
513 #if FF_API_OLD_FILTER_REGISTER
514 AVFilter **av_filter_next(AVFilter **filter)
516 return filter ? &(*filter)->next : &first_filter;
519 void avfilter_uninit(void)
524 int avfilter_pad_count(const AVFilterPad *pads)
531 for (count = 0; pads->name; count++)
536 static const char *default_filter_name(void *filter_ctx)
538 AVFilterContext *ctx = filter_ctx;
539 return ctx->name ? ctx->name : ctx->filter->name;
542 static void *filter_child_next(void *obj, void *prev)
544 AVFilterContext *ctx = obj;
545 if (!prev && ctx->filter && ctx->filter->priv_class && ctx->priv)
550 static const AVClass *filter_child_class_next(const AVClass *prev)
552 const AVFilter *f = NULL;
554 /* find the filter that corresponds to prev */
555 while (prev && (f = avfilter_next(f)))
556 if (f->priv_class == prev)
559 /* could not find filter corresponding to prev */
563 /* find next filter with specific options */
564 while ((f = avfilter_next(f)))
566 return f->priv_class;
571 #define OFFSET(x) offsetof(AVFilterContext, x)
572 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM
573 static const AVOption avfilter_options[] = {
574 { "thread_type", "Allowed thread types", OFFSET(thread_type), AV_OPT_TYPE_FLAGS,
575 { .i64 = AVFILTER_THREAD_SLICE }, 0, INT_MAX, FLAGS, "thread_type" },
576 { "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .unit = "thread_type" },
577 { "enable", "set enable expression", OFFSET(enable_str), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
581 static const AVClass avfilter_class = {
582 .class_name = "AVFilter",
583 .item_name = default_filter_name,
584 .version = LIBAVUTIL_VERSION_INT,
585 .category = AV_CLASS_CATEGORY_FILTER,
586 .child_next = filter_child_next,
587 .child_class_next = filter_child_class_next,
588 .option = avfilter_options,
591 static int default_execute(AVFilterContext *ctx, avfilter_action_func *func, void *arg,
592 int *ret, int nb_jobs)
596 for (i = 0; i < nb_jobs; i++) {
597 int r = func(ctx, arg, i, nb_jobs);
604 AVFilterContext *ff_filter_alloc(const AVFilter *filter, const char *inst_name)
606 AVFilterContext *ret;
611 ret = av_mallocz(sizeof(AVFilterContext));
615 ret->av_class = &avfilter_class;
616 ret->filter = filter;
617 ret->name = inst_name ? av_strdup(inst_name) : NULL;
618 if (filter->priv_size) {
619 ret->priv = av_mallocz(filter->priv_size);
624 av_opt_set_defaults(ret);
625 if (filter->priv_class) {
626 *(const AVClass**)ret->priv = filter->priv_class;
627 av_opt_set_defaults(ret->priv);
630 ret->internal = av_mallocz(sizeof(*ret->internal));
633 ret->internal->execute = default_execute;
635 ret->nb_inputs = avfilter_pad_count(filter->inputs);
636 if (ret->nb_inputs ) {
637 ret->input_pads = av_malloc_array(ret->nb_inputs, sizeof(AVFilterPad));
638 if (!ret->input_pads)
640 memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->nb_inputs);
641 ret->inputs = av_mallocz_array(ret->nb_inputs, sizeof(AVFilterLink*));
646 ret->nb_outputs = avfilter_pad_count(filter->outputs);
647 if (ret->nb_outputs) {
648 ret->output_pads = av_malloc_array(ret->nb_outputs, sizeof(AVFilterPad));
649 if (!ret->output_pads)
651 memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->nb_outputs);
652 ret->outputs = av_mallocz_array(ret->nb_outputs, sizeof(AVFilterLink*));
660 av_freep(&ret->inputs);
661 av_freep(&ret->input_pads);
663 av_freep(&ret->outputs);
664 av_freep(&ret->output_pads);
666 av_freep(&ret->priv);
667 av_freep(&ret->internal);
672 #if FF_API_AVFILTER_OPEN
673 int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
675 *filter_ctx = ff_filter_alloc(filter, inst_name);
676 return *filter_ctx ? 0 : AVERROR(ENOMEM);
680 static void free_link(AVFilterLink *link)
686 link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
688 link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
690 ff_formats_unref(&link->in_formats);
691 ff_formats_unref(&link->out_formats);
692 ff_formats_unref(&link->in_samplerates);
693 ff_formats_unref(&link->out_samplerates);
694 ff_channel_layouts_unref(&link->in_channel_layouts);
695 ff_channel_layouts_unref(&link->out_channel_layouts);
696 avfilter_link_free(&link);
699 void avfilter_free(AVFilterContext *filter)
707 ff_filter_graph_remove_filter(filter->graph, filter);
709 if (filter->filter->uninit)
710 filter->filter->uninit(filter);
712 for (i = 0; i < filter->nb_inputs; i++) {
713 free_link(filter->inputs[i]);
715 for (i = 0; i < filter->nb_outputs; i++) {
716 free_link(filter->outputs[i]);
719 if (filter->filter->priv_class)
720 av_opt_free(filter->priv);
722 av_freep(&filter->name);
723 av_freep(&filter->input_pads);
724 av_freep(&filter->output_pads);
725 av_freep(&filter->inputs);
726 av_freep(&filter->outputs);
727 av_freep(&filter->priv);
728 while(filter->command_queue){
729 ff_command_queue_pop(filter);
732 av_expr_free(filter->enable);
733 filter->enable = NULL;
734 av_freep(&filter->var_values);
735 av_freep(&filter->internal);
739 static int process_options(AVFilterContext *ctx, AVDictionary **options,
742 const AVOption *o = NULL;
744 char *av_uninit(parsed_key), *av_uninit(value);
752 const char *shorthand = NULL;
754 o = av_opt_next(ctx->priv, o);
756 if (o->type == AV_OPT_TYPE_CONST || o->offset == offset)
762 ret = av_opt_get_key_value(&args, "=", ":",
763 shorthand ? AV_OPT_FLAG_IMPLICIT_KEY : 0,
764 &parsed_key, &value);
766 if (ret == AVERROR(EINVAL))
767 av_log(ctx, AV_LOG_ERROR, "No option name near '%s'\n", args);
769 av_log(ctx, AV_LOG_ERROR, "Unable to parse '%s': %s\n", args,
777 while ((o = av_opt_next(ctx->priv, o))); /* discard all remaining shorthand */
782 av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value);
784 if (av_opt_find(ctx, key, NULL, 0, 0)) {
785 ret = av_opt_set(ctx, key, value, 0);
792 av_dict_set(options, key, value, 0);
793 if ((ret = av_opt_set(ctx->priv, key, value, 0)) < 0) {
794 if (!av_opt_find(ctx->priv, key, NULL, 0, AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ)) {
795 if (ret == AVERROR_OPTION_NOT_FOUND)
796 av_log(ctx, AV_LOG_ERROR, "Option '%s' not found\n", key);
809 if (ctx->enable_str) {
810 ret = set_enable_expr(ctx, ctx->enable_str);
817 #if FF_API_AVFILTER_INIT_FILTER
818 int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
820 return avfilter_init_str(filter, args);
824 int avfilter_init_dict(AVFilterContext *ctx, AVDictionary **options)
828 ret = av_opt_set_dict(ctx, options);
830 av_log(ctx, AV_LOG_ERROR, "Error applying generic filter options.\n");
834 if (ctx->filter->flags & AVFILTER_FLAG_SLICE_THREADS &&
835 ctx->thread_type & ctx->graph->thread_type & AVFILTER_THREAD_SLICE &&
836 ctx->graph->internal->thread_execute) {
837 ctx->thread_type = AVFILTER_THREAD_SLICE;
838 ctx->internal->execute = ctx->graph->internal->thread_execute;
840 ctx->thread_type = 0;
843 if (ctx->filter->priv_class) {
844 ret = av_opt_set_dict(ctx->priv, options);
846 av_log(ctx, AV_LOG_ERROR, "Error applying options to the filter.\n");
851 if (ctx->filter->init_opaque)
852 ret = ctx->filter->init_opaque(ctx, NULL);
853 else if (ctx->filter->init)
854 ret = ctx->filter->init(ctx);
855 else if (ctx->filter->init_dict)
856 ret = ctx->filter->init_dict(ctx, options);
861 int avfilter_init_str(AVFilterContext *filter, const char *args)
863 AVDictionary *options = NULL;
864 AVDictionaryEntry *e;
868 if (!filter->filter->priv_class) {
869 av_log(filter, AV_LOG_ERROR, "This filter does not take any "
870 "options, but options were provided: %s.\n", args);
871 return AVERROR(EINVAL);
874 #if FF_API_OLD_FILTER_OPTS || FF_API_OLD_FILTER_OPTS_ERROR
875 if ( !strcmp(filter->filter->name, "format") ||
876 !strcmp(filter->filter->name, "noformat") ||
877 !strcmp(filter->filter->name, "frei0r") ||
878 !strcmp(filter->filter->name, "frei0r_src") ||
879 !strcmp(filter->filter->name, "ocv") ||
880 !strcmp(filter->filter->name, "pan") ||
881 !strcmp(filter->filter->name, "pp") ||
882 !strcmp(filter->filter->name, "aevalsrc")) {
883 /* a hack for compatibility with the old syntax
884 * replace colons with |s */
885 char *copy = av_strdup(args);
887 int nb_leading = 0; // number of leading colons to skip
891 ret = AVERROR(ENOMEM);
895 if (!strcmp(filter->filter->name, "frei0r") ||
896 !strcmp(filter->filter->name, "ocv"))
898 else if (!strcmp(filter->filter->name, "frei0r_src"))
901 while (nb_leading--) {
904 p = copy + strlen(copy);
910 deprecated = strchr(p, ':') != NULL;
912 if (!strcmp(filter->filter->name, "aevalsrc")) {
914 while ((p = strchr(p, ':')) && p[1] != ':') {
915 const char *epos = strchr(p + 1, '=');
916 const char *spos = strchr(p + 1, ':');
917 const int next_token_is_opt = epos && (!spos || epos < spos);
918 if (next_token_is_opt) {
922 /* next token does not contain a '=', assume a channel expression */
926 if (p && *p == ':') { // double sep '::' found
928 memmove(p, p + 1, strlen(p));
931 while ((p = strchr(p, ':')))
934 #if FF_API_OLD_FILTER_OPTS
936 av_log(filter, AV_LOG_WARNING, "This syntax is deprecated. Use "
937 "'|' to separate the list items.\n");
939 av_log(filter, AV_LOG_DEBUG, "compat: called with args=[%s]\n", copy);
940 ret = process_options(filter, &options, copy);
943 av_log(filter, AV_LOG_ERROR, "This syntax is deprecated. Use "
944 "'|' to separate the list items ('%s' instead of '%s')\n",
946 ret = AVERROR(EINVAL);
948 ret = process_options(filter, &options, copy);
958 ret = process_options(filter, &options, args);
964 ret = avfilter_init_dict(filter, &options);
968 if ((e = av_dict_get(options, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
969 av_log(filter, AV_LOG_ERROR, "No such option: %s.\n", e->key);
970 ret = AVERROR_OPTION_NOT_FOUND;
975 av_dict_free(&options);
980 const char *avfilter_pad_get_name(const AVFilterPad *pads, int pad_idx)
982 return pads[pad_idx].name;
985 enum AVMediaType avfilter_pad_get_type(const AVFilterPad *pads, int pad_idx)
987 return pads[pad_idx].type;
990 static int default_filter_frame(AVFilterLink *link, AVFrame *frame)
992 return ff_filter_frame(link->dst->outputs[0], frame);
995 static int ff_filter_frame_framed(AVFilterLink *link, AVFrame *frame)
997 int (*filter_frame)(AVFilterLink *, AVFrame *);
998 AVFilterContext *dstctx = link->dst;
999 AVFilterPad *dst = link->dstpad;
1000 AVFrame *out = NULL;
1002 AVFilterCommand *cmd= link->dst->command_queue;
1006 av_frame_free(&frame);
1010 if (!(filter_frame = dst->filter_frame))
1011 filter_frame = default_filter_frame;
1013 /* copy the frame if needed */
1014 if (dst->needs_writable && !av_frame_is_writable(frame)) {
1015 av_log(link->dst, AV_LOG_DEBUG, "Copying data in avfilter.\n");
1017 switch (link->type) {
1018 case AVMEDIA_TYPE_VIDEO:
1019 out = ff_get_video_buffer(link, link->w, link->h);
1021 case AVMEDIA_TYPE_AUDIO:
1022 out = ff_get_audio_buffer(link, frame->nb_samples);
1025 ret = AVERROR(EINVAL);
1029 ret = AVERROR(ENOMEM);
1033 ret = av_frame_copy_props(out, frame);
1037 switch (link->type) {
1038 case AVMEDIA_TYPE_VIDEO:
1039 av_image_copy(out->data, out->linesize, (const uint8_t **)frame->data, frame->linesize,
1040 frame->format, frame->width, frame->height);
1042 case AVMEDIA_TYPE_AUDIO:
1043 av_samples_copy(out->extended_data, frame->extended_data,
1044 0, 0, frame->nb_samples,
1045 av_get_channel_layout_nb_channels(frame->channel_layout),
1049 ret = AVERROR(EINVAL);
1053 av_frame_free(&frame);
1057 while(cmd && cmd->time <= out->pts * av_q2d(link->time_base)){
1058 av_log(link->dst, AV_LOG_DEBUG,
1059 "Processing command time:%f command:%s arg:%s\n",
1060 cmd->time, cmd->command, cmd->arg);
1061 avfilter_process_command(link->dst, cmd->command, cmd->arg, 0, 0, cmd->flags);
1062 ff_command_queue_pop(link->dst);
1063 cmd= link->dst->command_queue;
1067 if (dstctx->enable_str) {
1068 int64_t pos = av_frame_get_pkt_pos(out);
1069 dstctx->var_values[VAR_N] = link->frame_count;
1070 dstctx->var_values[VAR_T] = pts == AV_NOPTS_VALUE ? NAN : pts * av_q2d(link->time_base);
1071 dstctx->var_values[VAR_W] = link->w;
1072 dstctx->var_values[VAR_H] = link->h;
1073 dstctx->var_values[VAR_POS] = pos == -1 ? NAN : pos;
1075 dstctx->is_disabled = fabs(av_expr_eval(dstctx->enable, dstctx->var_values, NULL)) < 0.5;
1076 if (dstctx->is_disabled &&
1077 (dstctx->filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC))
1078 filter_frame = default_filter_frame;
1080 ret = filter_frame(link, out);
1081 link->frame_count++;
1082 ff_update_link_current_pts(link, pts);
1086 av_frame_free(&out);
1087 av_frame_free(&frame);
1091 static int ff_filter_frame_needs_framing(AVFilterLink *link, AVFrame *frame)
1093 int insamples = frame->nb_samples, inpos = 0, nb_samples;
1094 AVFrame *pbuf = link->partial_buf;
1095 int nb_channels = av_frame_get_channels(frame);
1098 /* Handle framing (min_samples, max_samples) */
1101 AVRational samples_tb = { 1, link->sample_rate };
1102 pbuf = ff_get_audio_buffer(link, link->partial_buf_size);
1104 av_log(link->dst, AV_LOG_WARNING,
1105 "Samples dropped due to memory allocation failure.\n");
1108 av_frame_copy_props(pbuf, frame);
1109 pbuf->pts = frame->pts;
1110 if (pbuf->pts != AV_NOPTS_VALUE)
1111 pbuf->pts += av_rescale_q(inpos, samples_tb, link->time_base);
1112 pbuf->nb_samples = 0;
1114 nb_samples = FFMIN(insamples,
1115 link->partial_buf_size - pbuf->nb_samples);
1116 av_samples_copy(pbuf->extended_data, frame->extended_data,
1117 pbuf->nb_samples, inpos,
1118 nb_samples, nb_channels, link->format);
1119 inpos += nb_samples;
1120 insamples -= nb_samples;
1121 pbuf->nb_samples += nb_samples;
1122 if (pbuf->nb_samples >= link->min_samples) {
1123 ret = ff_filter_frame_framed(link, pbuf);
1127 av_frame_free(&frame);
1128 link->partial_buf = pbuf;
1132 int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
1134 FF_TPRINTF_START(NULL, filter_frame); ff_tlog_link(NULL, link, 1); ff_tlog(NULL, " "); ff_tlog_ref(NULL, frame, 1);
1136 /* Consistency checks */
1137 if (link->type == AVMEDIA_TYPE_VIDEO) {
1138 if (strcmp(link->dst->filter->name, "buffersink") &&
1139 strcmp(link->dst->filter->name, "format") &&
1140 strcmp(link->dst->filter->name, "idet") &&
1141 strcmp(link->dst->filter->name, "null") &&
1142 strcmp(link->dst->filter->name, "scale")) {
1143 av_assert1(frame->format == link->format);
1144 av_assert1(frame->width == link->w);
1145 av_assert1(frame->height == link->h);
1148 if (frame->format != link->format) {
1149 av_log(link->dst, AV_LOG_ERROR, "Format change is not supported\n");
1152 if (av_frame_get_channels(frame) != link->channels) {
1153 av_log(link->dst, AV_LOG_ERROR, "Channel count change is not supported\n");
1156 if (frame->channel_layout != link->channel_layout) {
1157 av_log(link->dst, AV_LOG_ERROR, "Channel layout change is not supported\n");
1160 if (frame->sample_rate != link->sample_rate) {
1161 av_log(link->dst, AV_LOG_ERROR, "Sample rate change is not supported\n");
1166 /* Go directly to actual filtering if possible */
1167 if (link->type == AVMEDIA_TYPE_AUDIO &&
1168 link->min_samples &&
1169 (link->partial_buf ||
1170 frame->nb_samples < link->min_samples ||
1171 frame->nb_samples > link->max_samples)) {
1172 return ff_filter_frame_needs_framing(link, frame);
1174 return ff_filter_frame_framed(link, frame);
1177 av_frame_free(&frame);
1178 return AVERROR_PATCHWELCOME;
1181 const AVClass *avfilter_get_class(void)
1183 return &avfilter_class;