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 static int ff_filter_frame_framed(AVFilterLink *link, AVFrame *frame);
42 void ff_tlog_ref(void *ctx, AVFrame *ref, int end)
44 av_unused char buf[16];
46 "ref[%p buf:%p data:%p linesize[%d, %d, %d, %d] pts:%"PRId64" pos:%"PRId64,
47 ref, ref->buf, ref->data[0],
48 ref->linesize[0], ref->linesize[1], ref->linesize[2], ref->linesize[3],
49 ref->pts, av_frame_get_pkt_pos(ref));
52 ff_tlog(ctx, " a:%d/%d s:%dx%d i:%c iskey:%d type:%c",
53 ref->sample_aspect_ratio.num, ref->sample_aspect_ratio.den,
54 ref->width, ref->height,
55 !ref->interlaced_frame ? 'P' : /* Progressive */
56 ref->top_field_first ? 'T' : 'B', /* Top / Bottom */
58 av_get_picture_type_char(ref->pict_type));
60 if (ref->nb_samples) {
61 ff_tlog(ctx, " cl:%"PRId64"d n:%d r:%d",
67 ff_tlog(ctx, "]%s", end ? "\n" : "");
70 unsigned avfilter_version(void)
72 av_assert0(LIBAVFILTER_VERSION_MICRO >= 100);
73 return LIBAVFILTER_VERSION_INT;
76 const char *avfilter_configuration(void)
78 return FFMPEG_CONFIGURATION;
81 const char *avfilter_license(void)
83 #define LICENSE_PREFIX "libavfilter license: "
84 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
87 void ff_command_queue_pop(AVFilterContext *filter)
89 AVFilterCommand *c= filter->command_queue;
91 av_freep(&c->command);
92 filter->command_queue= c->next;
96 int ff_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
97 AVFilterPad **pads, AVFilterLink ***links,
100 AVFilterLink **newlinks;
101 AVFilterPad *newpads;
104 idx = FFMIN(idx, *count);
106 newpads = av_realloc_array(*pads, *count + 1, sizeof(AVFilterPad));
107 newlinks = av_realloc_array(*links, *count + 1, sizeof(AVFilterLink*));
112 if (!newpads || !newlinks)
113 return AVERROR(ENOMEM);
115 memmove(*pads + idx + 1, *pads + idx, sizeof(AVFilterPad) * (*count - idx));
116 memmove(*links + idx + 1, *links + idx, sizeof(AVFilterLink*) * (*count - idx));
117 memcpy(*pads + idx, newpad, sizeof(AVFilterPad));
118 (*links)[idx] = NULL;
121 for (i = idx + 1; i < *count; i++)
123 (*(unsigned *)((uint8_t *) *links[i] + padidx_off))++;
128 int avfilter_link(AVFilterContext *src, unsigned srcpad,
129 AVFilterContext *dst, unsigned dstpad)
133 if (src->nb_outputs <= srcpad || dst->nb_inputs <= dstpad ||
134 src->outputs[srcpad] || dst->inputs[dstpad])
137 if (src->output_pads[srcpad].type != dst->input_pads[dstpad].type) {
138 av_log(src, AV_LOG_ERROR,
139 "Media type mismatch between the '%s' filter output pad %d (%s) and the '%s' filter input pad %d (%s)\n",
140 src->name, srcpad, (char *)av_x_if_null(av_get_media_type_string(src->output_pads[srcpad].type), "?"),
141 dst->name, dstpad, (char *)av_x_if_null(av_get_media_type_string(dst-> input_pads[dstpad].type), "?"));
142 return AVERROR(EINVAL);
145 link = av_mallocz(sizeof(*link));
147 return AVERROR(ENOMEM);
149 src->outputs[srcpad] = dst->inputs[dstpad] = link;
153 link->srcpad = &src->output_pads[srcpad];
154 link->dstpad = &dst->input_pads[dstpad];
155 link->type = src->output_pads[srcpad].type;
156 av_assert0(AV_PIX_FMT_NONE == -1 && AV_SAMPLE_FMT_NONE == -1);
162 void avfilter_link_free(AVFilterLink **link)
167 av_frame_free(&(*link)->partial_buf);
172 int avfilter_link_get_channels(AVFilterLink *link)
174 return link->channels;
177 void avfilter_link_set_closed(AVFilterLink *link, int closed)
179 link->closed = closed;
182 int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
183 unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
186 unsigned dstpad_idx = link->dstpad - link->dst->input_pads;
188 av_log(link->dst, AV_LOG_VERBOSE, "auto-inserting filter '%s' "
189 "between the filter '%s' and the filter '%s'\n",
190 filt->name, link->src->name, link->dst->name);
192 link->dst->inputs[dstpad_idx] = NULL;
193 if ((ret = avfilter_link(filt, filt_dstpad_idx, link->dst, dstpad_idx)) < 0) {
194 /* failed to link output filter to new filter */
195 link->dst->inputs[dstpad_idx] = link;
199 /* re-hookup the link to the new destination filter we inserted */
201 link->dstpad = &filt->input_pads[filt_srcpad_idx];
202 filt->inputs[filt_srcpad_idx] = link;
204 /* if any information on supported media formats already exists on the
205 * link, we need to preserve that */
206 if (link->out_formats)
207 ff_formats_changeref(&link->out_formats,
208 &filt->outputs[filt_dstpad_idx]->out_formats);
209 if (link->out_samplerates)
210 ff_formats_changeref(&link->out_samplerates,
211 &filt->outputs[filt_dstpad_idx]->out_samplerates);
212 if (link->out_channel_layouts)
213 ff_channel_layouts_changeref(&link->out_channel_layouts,
214 &filt->outputs[filt_dstpad_idx]->out_channel_layouts);
219 int avfilter_config_links(AVFilterContext *filter)
221 int (*config_link)(AVFilterLink *);
225 for (i = 0; i < filter->nb_inputs; i ++) {
226 AVFilterLink *link = filter->inputs[i];
227 AVFilterLink *inlink;
231 inlink = link->src->nb_inputs ? link->src->inputs[0] : NULL;
232 link->current_pts = AV_NOPTS_VALUE;
234 switch (link->init_state) {
237 case AVLINK_STARTINIT:
238 av_log(filter, AV_LOG_INFO, "circular filter chain detected\n");
241 link->init_state = AVLINK_STARTINIT;
243 if ((ret = avfilter_config_links(link->src)) < 0)
246 if (!(config_link = link->srcpad->config_props)) {
247 if (link->src->nb_inputs != 1) {
248 av_log(link->src, AV_LOG_ERROR, "Source filters and filters "
249 "with more than one input "
250 "must set config_props() "
251 "callbacks on all outputs\n");
252 return AVERROR(EINVAL);
254 } else if ((ret = config_link(link)) < 0) {
255 av_log(link->src, AV_LOG_ERROR,
256 "Failed to configure output pad on %s\n",
261 switch (link->type) {
262 case AVMEDIA_TYPE_VIDEO:
263 if (!link->time_base.num && !link->time_base.den)
264 link->time_base = inlink ? inlink->time_base : AV_TIME_BASE_Q;
266 if (!link->sample_aspect_ratio.num && !link->sample_aspect_ratio.den)
267 link->sample_aspect_ratio = inlink ?
268 inlink->sample_aspect_ratio : (AVRational){1,1};
270 if (inlink && !link->frame_rate.num && !link->frame_rate.den)
271 link->frame_rate = inlink->frame_rate;
278 } else if (!link->w || !link->h) {
279 av_log(link->src, AV_LOG_ERROR,
280 "Video source filters must set their output link's "
281 "width and height\n");
282 return AVERROR(EINVAL);
286 case AVMEDIA_TYPE_AUDIO:
288 if (!link->time_base.num && !link->time_base.den)
289 link->time_base = inlink->time_base;
292 if (!link->time_base.num && !link->time_base.den)
293 link->time_base = (AVRational) {1, link->sample_rate};
296 if ((config_link = link->dstpad->config_props))
297 if ((ret = config_link(link)) < 0) {
298 av_log(link->src, AV_LOG_ERROR,
299 "Failed to configure input pad on %s\n",
304 link->init_state = AVLINK_INIT;
311 void ff_tlog_link(void *ctx, AVFilterLink *link, int end)
313 if (link->type == AVMEDIA_TYPE_VIDEO) {
315 "link[%p s:%dx%d fmt:%s %s->%s]%s",
316 link, link->w, link->h,
317 av_get_pix_fmt_name(link->format),
318 link->src ? link->src->filter->name : "",
319 link->dst ? link->dst->filter->name : "",
323 av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);
326 "link[%p r:%d cl:%s fmt:%s %s->%s]%s",
327 link, (int)link->sample_rate, buf,
328 av_get_sample_fmt_name(link->format),
329 link->src ? link->src->filter->name : "",
330 link->dst ? link->dst->filter->name : "",
335 int ff_request_frame(AVFilterLink *link)
338 FF_TPRINTF_START(NULL, request_frame); ff_tlog_link(NULL, link, 1);
342 av_assert0(!link->frame_requested);
343 link->frame_requested = 1;
344 while (link->frame_requested) {
345 if (link->srcpad->request_frame)
346 ret = link->srcpad->request_frame(link);
347 else if (link->src->inputs[0])
348 ret = ff_request_frame(link->src->inputs[0]);
349 if (ret == AVERROR_EOF && link->partial_buf) {
350 AVFrame *pbuf = link->partial_buf;
351 link->partial_buf = NULL;
352 ret = ff_filter_frame_framed(link, pbuf);
355 link->frame_requested = 0;
356 if (ret == AVERROR_EOF)
359 av_assert0(!link->frame_requested ||
360 link->flags & FF_LINK_FLAG_REQUEST_LOOP);
366 int ff_poll_frame(AVFilterLink *link)
368 int i, min = INT_MAX;
370 if (link->srcpad->poll_frame)
371 return link->srcpad->poll_frame(link);
373 for (i = 0; i < link->src->nb_inputs; i++) {
375 if (!link->src->inputs[i])
377 val = ff_poll_frame(link->src->inputs[i]);
378 min = FFMIN(min, val);
384 static const char *const var_names[] = { "t", "n", "pos", NULL };
385 enum { VAR_T, VAR_N, VAR_POS, VAR_VARS_NB };
387 static int set_enable_expr(AVFilterContext *ctx, const char *expr)
391 AVExpr *old = ctx->enable;
393 if (!(ctx->filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE)) {
394 av_log(ctx, AV_LOG_ERROR, "Timeline ('enable' option) not supported "
395 "with filter '%s'\n", ctx->filter->name);
396 return AVERROR_PATCHWELCOME;
399 expr_dup = av_strdup(expr);
401 return AVERROR(ENOMEM);
403 if (!ctx->var_values) {
404 ctx->var_values = av_calloc(VAR_VARS_NB, sizeof(*ctx->var_values));
405 if (!ctx->var_values) {
407 return AVERROR(ENOMEM);
411 ret = av_expr_parse((AVExpr**)&ctx->enable, expr_dup, var_names,
412 NULL, NULL, NULL, NULL, 0, ctx->priv);
414 av_log(ctx->priv, AV_LOG_ERROR,
415 "Error when evaluating the expression '%s' for enable\n",
422 av_free(ctx->enable_str);
423 ctx->enable_str = expr_dup;
427 void ff_update_link_current_pts(AVFilterLink *link, int64_t pts)
429 if (pts == AV_NOPTS_VALUE)
431 link->current_pts = av_rescale_q(pts, link->time_base, AV_TIME_BASE_Q);
432 /* TODO use duration */
433 if (link->graph && link->age_index >= 0)
434 ff_avfilter_graph_update_heap(link->graph, link);
437 int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags)
439 if(!strcmp(cmd, "ping")){
440 char local_res[256] = {0};
444 res_len = sizeof(local_res);
446 av_strlcatf(res, res_len, "pong from:%s %s\n", filter->filter->name, filter->name);
447 if (res == local_res)
448 av_log(filter, AV_LOG_INFO, "%s", res);
450 }else if(!strcmp(cmd, "enable")) {
451 return set_enable_expr(filter, arg);
452 }else if(filter->filter->process_command) {
453 return filter->filter->process_command(filter, cmd, arg, res, res_len, flags);
455 return AVERROR(ENOSYS);
458 static AVFilter *first_filter;
460 AVFilter *avfilter_get_by_name(const char *name)
462 const AVFilter *f = NULL;
467 while ((f = avfilter_next(f)))
468 if (!strcmp(f->name, name))
469 return (AVFilter *)f;
474 int avfilter_register(AVFilter *filter)
476 AVFilter **f = &first_filter;
479 /* the filter must select generic or internal exclusively */
480 av_assert0((filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE) != AVFILTER_FLAG_SUPPORT_TIMELINE);
482 for(i=0; filter->inputs && filter->inputs[i].name; i++) {
483 const AVFilterPad *input = &filter->inputs[i];
484 av_assert0( !input->filter_frame
485 || (!input->start_frame && !input->end_frame));
490 while(avpriv_atomic_ptr_cas((void * volatile *)f, NULL, filter))
496 const AVFilter *avfilter_next(const AVFilter *prev)
498 return prev ? prev->next : first_filter;
501 #if FF_API_OLD_FILTER_REGISTER
502 AVFilter **av_filter_next(AVFilter **filter)
504 return filter ? &(*filter)->next : &first_filter;
507 void avfilter_uninit(void)
512 int avfilter_pad_count(const AVFilterPad *pads)
519 for (count = 0; pads->name; count++)
524 static const char *default_filter_name(void *filter_ctx)
526 AVFilterContext *ctx = filter_ctx;
527 return ctx->name ? ctx->name : ctx->filter->name;
530 static void *filter_child_next(void *obj, void *prev)
532 AVFilterContext *ctx = obj;
533 if (!prev && ctx->filter && ctx->filter->priv_class && ctx->priv)
538 static const AVClass *filter_child_class_next(const AVClass *prev)
540 const AVFilter *f = NULL;
542 /* find the filter that corresponds to prev */
543 while (prev && (f = avfilter_next(f)))
544 if (f->priv_class == prev)
547 /* could not find filter corresponding to prev */
551 /* find next filter with specific options */
552 while ((f = avfilter_next(f)))
554 return f->priv_class;
559 #define OFFSET(x) offsetof(AVFilterContext, x)
560 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM
561 static const AVOption avfilter_options[] = {
562 { "thread_type", "Allowed thread types", OFFSET(thread_type), AV_OPT_TYPE_FLAGS,
563 { .i64 = AVFILTER_THREAD_SLICE }, 0, INT_MAX, FLAGS, "thread_type" },
564 { "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .unit = "thread_type" },
565 { "enable", "set enable expression", OFFSET(enable_str), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
569 static const AVClass avfilter_class = {
570 .class_name = "AVFilter",
571 .item_name = default_filter_name,
572 .version = LIBAVUTIL_VERSION_INT,
573 .category = AV_CLASS_CATEGORY_FILTER,
574 .child_next = filter_child_next,
575 .child_class_next = filter_child_class_next,
576 .option = avfilter_options,
579 static int default_execute(AVFilterContext *ctx, avfilter_action_func *func, void *arg,
580 int *ret, int nb_jobs)
584 for (i = 0; i < nb_jobs; i++) {
585 int r = func(ctx, arg, i, nb_jobs);
592 AVFilterContext *ff_filter_alloc(const AVFilter *filter, const char *inst_name)
594 AVFilterContext *ret;
599 ret = av_mallocz(sizeof(AVFilterContext));
603 ret->av_class = &avfilter_class;
604 ret->filter = filter;
605 ret->name = inst_name ? av_strdup(inst_name) : NULL;
606 if (filter->priv_size) {
607 ret->priv = av_mallocz(filter->priv_size);
612 av_opt_set_defaults(ret);
613 if (filter->priv_class) {
614 *(const AVClass**)ret->priv = filter->priv_class;
615 av_opt_set_defaults(ret->priv);
618 ret->internal = av_mallocz(sizeof(*ret->internal));
621 ret->internal->execute = default_execute;
623 ret->nb_inputs = avfilter_pad_count(filter->inputs);
624 if (ret->nb_inputs ) {
625 ret->input_pads = av_malloc(sizeof(AVFilterPad) * ret->nb_inputs);
626 if (!ret->input_pads)
628 memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->nb_inputs);
629 ret->inputs = av_mallocz(sizeof(AVFilterLink*) * ret->nb_inputs);
634 ret->nb_outputs = avfilter_pad_count(filter->outputs);
635 if (ret->nb_outputs) {
636 ret->output_pads = av_malloc(sizeof(AVFilterPad) * ret->nb_outputs);
637 if (!ret->output_pads)
639 memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->nb_outputs);
640 ret->outputs = av_mallocz(sizeof(AVFilterLink*) * ret->nb_outputs);
645 FF_DISABLE_DEPRECATION_WARNINGS
646 ret->output_count = ret->nb_outputs;
647 ret->input_count = ret->nb_inputs;
648 FF_ENABLE_DEPRECATION_WARNINGS
654 av_freep(&ret->inputs);
655 av_freep(&ret->input_pads);
657 av_freep(&ret->outputs);
658 av_freep(&ret->output_pads);
660 av_freep(&ret->priv);
661 av_freep(&ret->internal);
666 #if FF_API_AVFILTER_OPEN
667 int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
669 *filter_ctx = ff_filter_alloc(filter, inst_name);
670 return *filter_ctx ? 0 : AVERROR(ENOMEM);
674 static void free_link(AVFilterLink *link)
680 link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
682 link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
684 ff_formats_unref(&link->in_formats);
685 ff_formats_unref(&link->out_formats);
686 ff_formats_unref(&link->in_samplerates);
687 ff_formats_unref(&link->out_samplerates);
688 ff_channel_layouts_unref(&link->in_channel_layouts);
689 ff_channel_layouts_unref(&link->out_channel_layouts);
690 avfilter_link_free(&link);
693 void avfilter_free(AVFilterContext *filter)
701 ff_filter_graph_remove_filter(filter->graph, filter);
703 if (filter->filter->uninit)
704 filter->filter->uninit(filter);
706 for (i = 0; i < filter->nb_inputs; i++) {
707 free_link(filter->inputs[i]);
709 for (i = 0; i < filter->nb_outputs; i++) {
710 free_link(filter->outputs[i]);
713 if (filter->filter->priv_class)
714 av_opt_free(filter->priv);
716 av_freep(&filter->name);
717 av_freep(&filter->input_pads);
718 av_freep(&filter->output_pads);
719 av_freep(&filter->inputs);
720 av_freep(&filter->outputs);
721 av_freep(&filter->priv);
722 while(filter->command_queue){
723 ff_command_queue_pop(filter);
726 av_expr_free(filter->enable);
727 filter->enable = NULL;
728 av_freep(&filter->var_values);
729 av_freep(&filter->internal);
733 static int process_options(AVFilterContext *ctx, AVDictionary **options,
736 const AVOption *o = NULL;
738 char *av_uninit(parsed_key), *av_uninit(value);
746 const char *shorthand = NULL;
748 o = av_opt_next(ctx->priv, o);
750 if (o->type == AV_OPT_TYPE_CONST || o->offset == offset)
756 ret = av_opt_get_key_value(&args, "=", ":",
757 shorthand ? AV_OPT_FLAG_IMPLICIT_KEY : 0,
758 &parsed_key, &value);
760 if (ret == AVERROR(EINVAL))
761 av_log(ctx, AV_LOG_ERROR, "No option name near '%s'\n", args);
763 av_log(ctx, AV_LOG_ERROR, "Unable to parse '%s': %s\n", args,
771 while ((o = av_opt_next(ctx->priv, o))); /* discard all remaining shorthand */
776 av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value);
778 if (av_opt_find(ctx, key, NULL, 0, 0)) {
779 ret = av_opt_set(ctx, key, value, 0);
786 av_dict_set(options, key, value, 0);
787 if ((ret = av_opt_set(ctx->priv, key, value, 0)) < 0) {
788 if (!av_opt_find(ctx->priv, key, NULL, 0, AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ)) {
789 if (ret == AVERROR_OPTION_NOT_FOUND)
790 av_log(ctx, AV_LOG_ERROR, "Option '%s' not found\n", key);
803 if (ctx->enable_str) {
804 ret = set_enable_expr(ctx, ctx->enable_str);
811 #if FF_API_AVFILTER_INIT_FILTER
812 int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
814 return avfilter_init_str(filter, args);
818 int avfilter_init_dict(AVFilterContext *ctx, AVDictionary **options)
822 ret = av_opt_set_dict(ctx, options);
824 av_log(ctx, AV_LOG_ERROR, "Error applying generic filter options.\n");
828 if (ctx->filter->flags & AVFILTER_FLAG_SLICE_THREADS &&
829 ctx->thread_type & ctx->graph->thread_type & AVFILTER_THREAD_SLICE &&
830 ctx->graph->internal->thread_execute) {
831 ctx->thread_type = AVFILTER_THREAD_SLICE;
832 ctx->internal->execute = ctx->graph->internal->thread_execute;
834 ctx->thread_type = 0;
837 if (ctx->filter->priv_class) {
838 ret = av_opt_set_dict(ctx->priv, options);
840 av_log(ctx, AV_LOG_ERROR, "Error applying options to the filter.\n");
845 if (ctx->filter->init_opaque)
846 ret = ctx->filter->init_opaque(ctx, NULL);
847 else if (ctx->filter->init)
848 ret = ctx->filter->init(ctx);
849 else if (ctx->filter->init_dict)
850 ret = ctx->filter->init_dict(ctx, options);
855 int avfilter_init_str(AVFilterContext *filter, const char *args)
857 AVDictionary *options = NULL;
858 AVDictionaryEntry *e;
862 if (!filter->filter->priv_class) {
863 av_log(filter, AV_LOG_ERROR, "This filter does not take any "
864 "options, but options were provided: %s.\n", args);
865 return AVERROR(EINVAL);
868 #if FF_API_OLD_FILTER_OPTS
869 if ( !strcmp(filter->filter->name, "format") ||
870 !strcmp(filter->filter->name, "noformat") ||
871 !strcmp(filter->filter->name, "frei0r") ||
872 !strcmp(filter->filter->name, "frei0r_src") ||
873 !strcmp(filter->filter->name, "ocv") ||
874 !strcmp(filter->filter->name, "pan") ||
875 !strcmp(filter->filter->name, "pp") ||
876 !strcmp(filter->filter->name, "aevalsrc")) {
877 /* a hack for compatibility with the old syntax
878 * replace colons with |s */
879 char *copy = av_strdup(args);
881 int nb_leading = 0; // number of leading colons to skip
885 ret = AVERROR(ENOMEM);
889 if (!strcmp(filter->filter->name, "frei0r") ||
890 !strcmp(filter->filter->name, "ocv"))
892 else if (!strcmp(filter->filter->name, "frei0r_src"))
895 while (nb_leading--) {
898 p = copy + strlen(copy);
904 deprecated = strchr(p, ':') != NULL;
906 if (!strcmp(filter->filter->name, "aevalsrc")) {
908 while ((p = strchr(p, ':')) && p[1] != ':') {
909 const char *epos = strchr(p + 1, '=');
910 const char *spos = strchr(p + 1, ':');
911 const int next_token_is_opt = epos && (!spos || epos < spos);
912 if (next_token_is_opt) {
916 /* next token does not contain a '=', assume a channel expression */
920 if (p && *p == ':') { // double sep '::' found
922 memmove(p, p + 1, strlen(p));
925 while ((p = strchr(p, ':')))
929 av_log(filter, AV_LOG_WARNING, "This syntax is deprecated. Use "
930 "'|' to separate the list items.\n");
932 av_log(filter, AV_LOG_DEBUG, "compat: called with args=[%s]\n", copy);
933 ret = process_options(filter, &options, copy);
941 if (!strcmp(filter->filter->name, "mp")) {
944 if (!strncmp(args, "filter=", 7))
946 ret = av_escape(&escaped, args, ":=", AV_ESCAPE_MODE_BACKSLASH, 0);
948 av_log(filter, AV_LOG_ERROR, "Unable to escape MPlayer filters arg '%s'\n", args);
951 ret = process_options(filter, &options, escaped);
955 ret = process_options(filter, &options, args);
961 ret = avfilter_init_dict(filter, &options);
965 if ((e = av_dict_get(options, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
966 av_log(filter, AV_LOG_ERROR, "No such option: %s.\n", e->key);
967 ret = AVERROR_OPTION_NOT_FOUND;
972 av_dict_free(&options);
977 const char *avfilter_pad_get_name(const AVFilterPad *pads, int pad_idx)
979 return pads[pad_idx].name;
982 enum AVMediaType avfilter_pad_get_type(const AVFilterPad *pads, int pad_idx)
984 return pads[pad_idx].type;
987 static int default_filter_frame(AVFilterLink *link, AVFrame *frame)
989 return ff_filter_frame(link->dst->outputs[0], frame);
992 static int ff_filter_frame_framed(AVFilterLink *link, AVFrame *frame)
994 int (*filter_frame)(AVFilterLink *, AVFrame *);
995 AVFilterContext *dstctx = link->dst;
996 AVFilterPad *dst = link->dstpad;
999 AVFilterCommand *cmd= link->dst->command_queue;
1003 av_frame_free(&frame);
1007 if (!(filter_frame = dst->filter_frame))
1008 filter_frame = default_filter_frame;
1010 /* copy the frame if needed */
1011 if (dst->needs_writable && !av_frame_is_writable(frame)) {
1012 av_log(link->dst, AV_LOG_DEBUG, "Copying data in avfilter.\n");
1014 /* Maybe use ff_copy_buffer_ref instead? */
1015 switch (link->type) {
1016 case AVMEDIA_TYPE_VIDEO:
1017 out = ff_get_video_buffer(link, link->w, link->h);
1019 case AVMEDIA_TYPE_AUDIO:
1020 out = ff_get_audio_buffer(link, frame->nb_samples);
1022 default: return AVERROR(EINVAL);
1025 av_frame_free(&frame);
1026 return AVERROR(ENOMEM);
1028 av_frame_copy_props(out, frame);
1030 switch (link->type) {
1031 case AVMEDIA_TYPE_VIDEO:
1032 av_image_copy(out->data, out->linesize, (const uint8_t **)frame->data, frame->linesize,
1033 frame->format, frame->width, frame->height);
1035 case AVMEDIA_TYPE_AUDIO:
1036 av_samples_copy(out->extended_data, frame->extended_data,
1037 0, 0, frame->nb_samples,
1038 av_get_channel_layout_nb_channels(frame->channel_layout),
1041 default: return AVERROR(EINVAL);
1044 av_frame_free(&frame);
1048 while(cmd && cmd->time <= out->pts * av_q2d(link->time_base)){
1049 av_log(link->dst, AV_LOG_DEBUG,
1050 "Processing command time:%f command:%s arg:%s\n",
1051 cmd->time, cmd->command, cmd->arg);
1052 avfilter_process_command(link->dst, cmd->command, cmd->arg, 0, 0, cmd->flags);
1053 ff_command_queue_pop(link->dst);
1054 cmd= link->dst->command_queue;
1058 if (dstctx->enable_str) {
1059 int64_t pos = av_frame_get_pkt_pos(out);
1060 dstctx->var_values[VAR_N] = link->frame_count;
1061 dstctx->var_values[VAR_T] = pts == AV_NOPTS_VALUE ? NAN : pts * av_q2d(link->time_base);
1062 dstctx->var_values[VAR_POS] = pos == -1 ? NAN : pos;
1064 dstctx->is_disabled = fabs(av_expr_eval(dstctx->enable, dstctx->var_values, NULL)) < 0.5;
1065 if (dstctx->is_disabled &&
1066 (dstctx->filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC))
1067 filter_frame = default_filter_frame;
1069 ret = filter_frame(link, out);
1070 link->frame_count++;
1071 link->frame_requested = 0;
1072 ff_update_link_current_pts(link, pts);
1076 static int ff_filter_frame_needs_framing(AVFilterLink *link, AVFrame *frame)
1078 int insamples = frame->nb_samples, inpos = 0, nb_samples;
1079 AVFrame *pbuf = link->partial_buf;
1080 int nb_channels = av_frame_get_channels(frame);
1083 link->flags |= FF_LINK_FLAG_REQUEST_LOOP;
1084 /* Handle framing (min_samples, max_samples) */
1087 AVRational samples_tb = { 1, link->sample_rate };
1088 pbuf = ff_get_audio_buffer(link, link->partial_buf_size);
1090 av_log(link->dst, AV_LOG_WARNING,
1091 "Samples dropped due to memory allocation failure.\n");
1094 av_frame_copy_props(pbuf, frame);
1095 pbuf->pts = frame->pts +
1096 av_rescale_q(inpos, samples_tb, link->time_base);
1097 pbuf->nb_samples = 0;
1099 nb_samples = FFMIN(insamples,
1100 link->partial_buf_size - pbuf->nb_samples);
1101 av_samples_copy(pbuf->extended_data, frame->extended_data,
1102 pbuf->nb_samples, inpos,
1103 nb_samples, nb_channels, link->format);
1104 inpos += nb_samples;
1105 insamples -= nb_samples;
1106 pbuf->nb_samples += nb_samples;
1107 if (pbuf->nb_samples >= link->min_samples) {
1108 ret = ff_filter_frame_framed(link, pbuf);
1112 av_frame_free(&frame);
1113 link->partial_buf = pbuf;
1117 int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
1119 FF_TPRINTF_START(NULL, filter_frame); ff_tlog_link(NULL, link, 1); ff_tlog(NULL, " "); ff_tlog_ref(NULL, frame, 1);
1121 /* Consistency checks */
1122 if (link->type == AVMEDIA_TYPE_VIDEO) {
1123 if (strcmp(link->dst->filter->name, "scale")) {
1124 av_assert1(frame->format == link->format);
1125 av_assert1(frame->width == link->w);
1126 av_assert1(frame->height == link->h);
1129 av_assert1(frame->format == link->format);
1130 av_assert1(av_frame_get_channels(frame) == link->channels);
1131 av_assert1(frame->channel_layout == link->channel_layout);
1132 av_assert1(frame->sample_rate == link->sample_rate);
1135 /* Go directly to actual filtering if possible */
1136 if (link->type == AVMEDIA_TYPE_AUDIO &&
1137 link->min_samples &&
1138 (link->partial_buf ||
1139 frame->nb_samples < link->min_samples ||
1140 frame->nb_samples > link->max_samples)) {
1141 return ff_filter_frame_needs_framing(link, frame);
1143 return ff_filter_frame_framed(link, frame);
1147 const AVClass *avfilter_get_class(void)
1149 return &avfilter_class;