3 * Copyright (c) 2007 Bobby Bingham
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/atomic.h"
23 #include "libavutil/avassert.h"
24 #include "libavutil/avstring.h"
25 #include "libavutil/channel_layout.h"
26 #include "libavutil/common.h"
27 #include "libavutil/eval.h"
28 #include "libavutil/imgutils.h"
29 #include "libavutil/internal.h"
30 #include "libavutil/opt.h"
31 #include "libavutil/pixdesc.h"
32 #include "libavutil/rational.h"
33 #include "libavutil/samplefmt.h"
41 static int ff_filter_frame_framed(AVFilterLink *link, AVFrame *frame);
43 void ff_tlog_ref(void *ctx, AVFrame *ref, int end)
45 av_unused char buf[16];
47 "ref[%p buf:%p data:%p linesize[%d, %d, %d, %d] pts:%"PRId64" pos:%"PRId64,
48 ref, ref->buf, ref->data[0],
49 ref->linesize[0], ref->linesize[1], ref->linesize[2], ref->linesize[3],
50 ref->pts, av_frame_get_pkt_pos(ref));
53 ff_tlog(ctx, " a:%d/%d s:%dx%d i:%c iskey:%d type:%c",
54 ref->sample_aspect_ratio.num, ref->sample_aspect_ratio.den,
55 ref->width, ref->height,
56 !ref->interlaced_frame ? 'P' : /* Progressive */
57 ref->top_field_first ? 'T' : 'B', /* Top / Bottom */
59 av_get_picture_type_char(ref->pict_type));
61 if (ref->nb_samples) {
62 ff_tlog(ctx, " cl:%"PRId64"d n:%d r:%d",
68 ff_tlog(ctx, "]%s", end ? "\n" : "");
71 unsigned avfilter_version(void)
73 av_assert0(LIBAVFILTER_VERSION_MICRO >= 100);
74 return LIBAVFILTER_VERSION_INT;
77 const char *avfilter_configuration(void)
79 return FFMPEG_CONFIGURATION;
82 const char *avfilter_license(void)
84 #define LICENSE_PREFIX "libavfilter license: "
85 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
88 void ff_command_queue_pop(AVFilterContext *filter)
90 AVFilterCommand *c= filter->command_queue;
92 av_freep(&c->command);
93 filter->command_queue= c->next;
97 void ff_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
98 AVFilterPad **pads, AVFilterLink ***links,
103 idx = FFMIN(idx, *count);
105 *pads = av_realloc(*pads, sizeof(AVFilterPad) * (*count + 1));
106 *links = av_realloc(*links, sizeof(AVFilterLink*) * (*count + 1));
107 memmove(*pads + idx + 1, *pads + idx, sizeof(AVFilterPad) * (*count - idx));
108 memmove(*links + idx + 1, *links + idx, sizeof(AVFilterLink*) * (*count - idx));
109 memcpy(*pads + idx, newpad, sizeof(AVFilterPad));
110 (*links)[idx] = NULL;
113 for (i = idx + 1; i < *count; i++)
115 (*(unsigned *)((uint8_t *) *links[i] + padidx_off))++;
118 int avfilter_link(AVFilterContext *src, unsigned srcpad,
119 AVFilterContext *dst, unsigned dstpad)
123 if (src->nb_outputs <= srcpad || dst->nb_inputs <= dstpad ||
124 src->outputs[srcpad] || dst->inputs[dstpad])
127 if (src->output_pads[srcpad].type != dst->input_pads[dstpad].type) {
128 av_log(src, AV_LOG_ERROR,
129 "Media type mismatch between the '%s' filter output pad %d (%s) and the '%s' filter input pad %d (%s)\n",
130 src->name, srcpad, (char *)av_x_if_null(av_get_media_type_string(src->output_pads[srcpad].type), "?"),
131 dst->name, dstpad, (char *)av_x_if_null(av_get_media_type_string(dst-> input_pads[dstpad].type), "?"));
132 return AVERROR(EINVAL);
135 link = av_mallocz(sizeof(*link));
137 return AVERROR(ENOMEM);
139 src->outputs[srcpad] = dst->inputs[dstpad] = link;
143 link->srcpad = &src->output_pads[srcpad];
144 link->dstpad = &dst->input_pads[dstpad];
145 link->type = src->output_pads[srcpad].type;
146 av_assert0(AV_PIX_FMT_NONE == -1 && AV_SAMPLE_FMT_NONE == -1);
152 void avfilter_link_free(AVFilterLink **link)
157 av_frame_free(&(*link)->partial_buf);
162 int avfilter_link_get_channels(AVFilterLink *link)
164 return link->channels;
167 void avfilter_link_set_closed(AVFilterLink *link, int closed)
169 link->closed = closed;
172 int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
173 unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
176 unsigned dstpad_idx = link->dstpad - link->dst->input_pads;
178 av_log(link->dst, AV_LOG_VERBOSE, "auto-inserting filter '%s' "
179 "between the filter '%s' and the filter '%s'\n",
180 filt->name, link->src->name, link->dst->name);
182 link->dst->inputs[dstpad_idx] = NULL;
183 if ((ret = avfilter_link(filt, filt_dstpad_idx, link->dst, dstpad_idx)) < 0) {
184 /* failed to link output filter to new filter */
185 link->dst->inputs[dstpad_idx] = link;
189 /* re-hookup the link to the new destination filter we inserted */
191 link->dstpad = &filt->input_pads[filt_srcpad_idx];
192 filt->inputs[filt_srcpad_idx] = link;
194 /* if any information on supported media formats already exists on the
195 * link, we need to preserve that */
196 if (link->out_formats)
197 ff_formats_changeref(&link->out_formats,
198 &filt->outputs[filt_dstpad_idx]->out_formats);
199 if (link->out_samplerates)
200 ff_formats_changeref(&link->out_samplerates,
201 &filt->outputs[filt_dstpad_idx]->out_samplerates);
202 if (link->out_channel_layouts)
203 ff_channel_layouts_changeref(&link->out_channel_layouts,
204 &filt->outputs[filt_dstpad_idx]->out_channel_layouts);
209 int avfilter_config_links(AVFilterContext *filter)
211 int (*config_link)(AVFilterLink *);
215 for (i = 0; i < filter->nb_inputs; i ++) {
216 AVFilterLink *link = filter->inputs[i];
217 AVFilterLink *inlink;
221 inlink = link->src->nb_inputs ? link->src->inputs[0] : NULL;
222 link->current_pts = AV_NOPTS_VALUE;
224 switch (link->init_state) {
227 case AVLINK_STARTINIT:
228 av_log(filter, AV_LOG_INFO, "circular filter chain detected\n");
231 link->init_state = AVLINK_STARTINIT;
233 if ((ret = avfilter_config_links(link->src)) < 0)
236 if (!(config_link = link->srcpad->config_props)) {
237 if (link->src->nb_inputs != 1) {
238 av_log(link->src, AV_LOG_ERROR, "Source filters and filters "
239 "with more than one input "
240 "must set config_props() "
241 "callbacks on all outputs\n");
242 return AVERROR(EINVAL);
244 } else if ((ret = config_link(link)) < 0) {
245 av_log(link->src, AV_LOG_ERROR,
246 "Failed to configure output pad on %s\n",
251 switch (link->type) {
252 case AVMEDIA_TYPE_VIDEO:
253 if (!link->time_base.num && !link->time_base.den)
254 link->time_base = inlink ? inlink->time_base : AV_TIME_BASE_Q;
256 if (!link->sample_aspect_ratio.num && !link->sample_aspect_ratio.den)
257 link->sample_aspect_ratio = inlink ?
258 inlink->sample_aspect_ratio : (AVRational){1,1};
260 if (inlink && !link->frame_rate.num && !link->frame_rate.den)
261 link->frame_rate = inlink->frame_rate;
268 } else if (!link->w || !link->h) {
269 av_log(link->src, AV_LOG_ERROR,
270 "Video source filters must set their output link's "
271 "width and height\n");
272 return AVERROR(EINVAL);
276 case AVMEDIA_TYPE_AUDIO:
278 if (!link->time_base.num && !link->time_base.den)
279 link->time_base = inlink->time_base;
282 if (!link->time_base.num && !link->time_base.den)
283 link->time_base = (AVRational) {1, link->sample_rate};
286 if ((config_link = link->dstpad->config_props))
287 if ((ret = config_link(link)) < 0) {
288 av_log(link->src, AV_LOG_ERROR,
289 "Failed to configure input pad on %s\n",
294 link->init_state = AVLINK_INIT;
301 void ff_tlog_link(void *ctx, AVFilterLink *link, int end)
303 if (link->type == AVMEDIA_TYPE_VIDEO) {
305 "link[%p s:%dx%d fmt:%s %s->%s]%s",
306 link, link->w, link->h,
307 av_get_pix_fmt_name(link->format),
308 link->src ? link->src->filter->name : "",
309 link->dst ? link->dst->filter->name : "",
313 av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);
316 "link[%p r:%d cl:%s fmt:%s %s->%s]%s",
317 link, (int)link->sample_rate, buf,
318 av_get_sample_fmt_name(link->format),
319 link->src ? link->src->filter->name : "",
320 link->dst ? link->dst->filter->name : "",
325 int ff_request_frame(AVFilterLink *link)
328 FF_TPRINTF_START(NULL, request_frame); ff_tlog_link(NULL, link, 1);
332 av_assert0(!link->frame_requested);
333 link->frame_requested = 1;
334 while (link->frame_requested) {
335 if (link->srcpad->request_frame)
336 ret = link->srcpad->request_frame(link);
337 else if (link->src->inputs[0])
338 ret = ff_request_frame(link->src->inputs[0]);
339 if (ret == AVERROR_EOF && link->partial_buf) {
340 AVFrame *pbuf = link->partial_buf;
341 link->partial_buf = NULL;
342 ret = ff_filter_frame_framed(link, pbuf);
345 link->frame_requested = 0;
346 if (ret == AVERROR_EOF)
349 av_assert0(!link->frame_requested ||
350 link->flags & FF_LINK_FLAG_REQUEST_LOOP);
356 int ff_poll_frame(AVFilterLink *link)
358 int i, min = INT_MAX;
360 if (link->srcpad->poll_frame)
361 return link->srcpad->poll_frame(link);
363 for (i = 0; i < link->src->nb_inputs; i++) {
365 if (!link->src->inputs[i])
367 val = ff_poll_frame(link->src->inputs[i]);
368 min = FFMIN(min, val);
374 static const char *const var_names[] = { "t", "n", "pos", NULL };
375 enum { VAR_T, VAR_N, VAR_POS, VAR_VARS_NB };
377 static int set_enable_expr(AVFilterContext *ctx, const char *expr)
381 AVExpr *old = ctx->enable;
383 if (!(ctx->filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE)) {
384 av_log(ctx, AV_LOG_ERROR, "Timeline ('enable' option) not supported "
385 "with filter '%s'\n", ctx->filter->name);
386 return AVERROR_PATCHWELCOME;
389 expr_dup = av_strdup(expr);
391 return AVERROR(ENOMEM);
393 if (!ctx->var_values) {
394 ctx->var_values = av_calloc(VAR_VARS_NB, sizeof(*ctx->var_values));
395 if (!ctx->var_values) {
397 return AVERROR(ENOMEM);
401 ret = av_expr_parse((AVExpr**)&ctx->enable, expr_dup, var_names,
402 NULL, NULL, NULL, NULL, 0, ctx->priv);
404 av_log(ctx->priv, AV_LOG_ERROR,
405 "Error when evaluating the expression '%s' for enable\n",
412 av_free(ctx->enable_str);
413 ctx->enable_str = expr_dup;
417 void ff_update_link_current_pts(AVFilterLink *link, int64_t pts)
419 if (pts == AV_NOPTS_VALUE)
421 link->current_pts = av_rescale_q(pts, link->time_base, AV_TIME_BASE_Q);
422 /* TODO use duration */
423 if (link->graph && link->age_index >= 0)
424 ff_avfilter_graph_update_heap(link->graph, link);
427 int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags)
429 if(!strcmp(cmd, "ping")){
430 av_strlcatf(res, res_len, "pong from:%s %s\n", filter->filter->name, filter->name);
432 }else if(!strcmp(cmd, "enable")) {
433 return set_enable_expr(filter, arg);
434 }else if(filter->filter->process_command) {
435 return filter->filter->process_command(filter, cmd, arg, res, res_len, flags);
437 return AVERROR(ENOSYS);
440 static AVFilter *first_filter;
442 AVFilter *avfilter_get_by_name(const char *name)
444 const AVFilter *f = NULL;
449 while ((f = avfilter_next(f)))
450 if (!strcmp(f->name, name))
451 return (AVFilter *)f;
456 int avfilter_register(AVFilter *filter)
458 AVFilter **f = &first_filter;
461 /* the filter must select generic or internal exclusively */
462 av_assert0((filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE) != AVFILTER_FLAG_SUPPORT_TIMELINE);
464 for(i=0; filter->inputs && filter->inputs[i].name; i++) {
465 const AVFilterPad *input = &filter->inputs[i];
466 av_assert0( !input->filter_frame
467 || (!input->start_frame && !input->end_frame));
472 while(avpriv_atomic_ptr_cas((void * volatile *)f, NULL, filter))
478 const AVFilter *avfilter_next(const AVFilter *prev)
480 return prev ? prev->next : first_filter;
483 #if FF_API_OLD_FILTER_REGISTER
484 AVFilter **av_filter_next(AVFilter **filter)
486 return filter ? &(*filter)->next : &first_filter;
489 void avfilter_uninit(void)
494 int avfilter_pad_count(const AVFilterPad *pads)
501 for (count = 0; pads->name; count++)
506 static const char *default_filter_name(void *filter_ctx)
508 AVFilterContext *ctx = filter_ctx;
509 return ctx->name ? ctx->name : ctx->filter->name;
512 static void *filter_child_next(void *obj, void *prev)
514 AVFilterContext *ctx = obj;
515 if (!prev && ctx->filter && ctx->filter->priv_class && ctx->priv)
520 static const AVClass *filter_child_class_next(const AVClass *prev)
522 const AVFilter *f = NULL;
524 /* find the filter that corresponds to prev */
525 while (prev && (f = avfilter_next(f)))
526 if (f->priv_class == prev)
529 /* could not find filter corresponding to prev */
533 /* find next filter with specific options */
534 while ((f = avfilter_next(f)))
536 return f->priv_class;
541 #define OFFSET(x) offsetof(AVFilterContext, x)
542 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM
543 static const AVOption avfilter_options[] = {
544 { "thread_type", "Allowed thread types", OFFSET(thread_type), AV_OPT_TYPE_FLAGS,
545 { .i64 = AVFILTER_THREAD_SLICE }, 0, INT_MAX, FLAGS, "thread_type" },
546 { "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .unit = "thread_type" },
547 { "enable", "set enable expression", OFFSET(enable_str), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
551 static const AVClass avfilter_class = {
552 .class_name = "AVFilter",
553 .item_name = default_filter_name,
554 .version = LIBAVUTIL_VERSION_INT,
555 .category = AV_CLASS_CATEGORY_FILTER,
556 .child_next = filter_child_next,
557 .child_class_next = filter_child_class_next,
558 .option = avfilter_options,
561 static int default_execute(AVFilterContext *ctx, action_func *func, void *arg,
562 int *ret, int nb_jobs)
566 for (i = 0; i < nb_jobs; i++) {
567 int r = func(ctx, arg, i, nb_jobs);
574 AVFilterContext *ff_filter_alloc(const AVFilter *filter, const char *inst_name)
576 AVFilterContext *ret;
581 ret = av_mallocz(sizeof(AVFilterContext));
585 ret->av_class = &avfilter_class;
586 ret->filter = filter;
587 ret->name = inst_name ? av_strdup(inst_name) : NULL;
588 if (filter->priv_size) {
589 ret->priv = av_mallocz(filter->priv_size);
594 av_opt_set_defaults(ret);
595 if (filter->priv_class) {
596 *(const AVClass**)ret->priv = filter->priv_class;
597 av_opt_set_defaults(ret->priv);
600 ret->internal = av_mallocz(sizeof(*ret->internal));
603 ret->internal->execute = default_execute;
605 ret->nb_inputs = avfilter_pad_count(filter->inputs);
606 if (ret->nb_inputs ) {
607 ret->input_pads = av_malloc(sizeof(AVFilterPad) * ret->nb_inputs);
608 if (!ret->input_pads)
610 memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->nb_inputs);
611 ret->inputs = av_mallocz(sizeof(AVFilterLink*) * ret->nb_inputs);
616 ret->nb_outputs = avfilter_pad_count(filter->outputs);
617 if (ret->nb_outputs) {
618 ret->output_pads = av_malloc(sizeof(AVFilterPad) * ret->nb_outputs);
619 if (!ret->output_pads)
621 memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->nb_outputs);
622 ret->outputs = av_mallocz(sizeof(AVFilterLink*) * ret->nb_outputs);
627 FF_DISABLE_DEPRECATION_WARNINGS
628 ret->output_count = ret->nb_outputs;
629 ret->input_count = ret->nb_inputs;
630 FF_ENABLE_DEPRECATION_WARNINGS
636 av_freep(&ret->inputs);
637 av_freep(&ret->input_pads);
639 av_freep(&ret->outputs);
640 av_freep(&ret->output_pads);
642 av_freep(&ret->priv);
643 av_freep(&ret->internal);
648 #if FF_API_AVFILTER_OPEN
649 int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
651 *filter_ctx = ff_filter_alloc(filter, inst_name);
652 return *filter_ctx ? 0 : AVERROR(ENOMEM);
656 static void free_link(AVFilterLink *link)
662 link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
664 link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
666 ff_formats_unref(&link->in_formats);
667 ff_formats_unref(&link->out_formats);
668 ff_formats_unref(&link->in_samplerates);
669 ff_formats_unref(&link->out_samplerates);
670 ff_channel_layouts_unref(&link->in_channel_layouts);
671 ff_channel_layouts_unref(&link->out_channel_layouts);
672 avfilter_link_free(&link);
675 void avfilter_free(AVFilterContext *filter)
683 ff_filter_graph_remove_filter(filter->graph, filter);
685 if (filter->filter->uninit)
686 filter->filter->uninit(filter);
688 for (i = 0; i < filter->nb_inputs; i++) {
689 free_link(filter->inputs[i]);
691 for (i = 0; i < filter->nb_outputs; i++) {
692 free_link(filter->outputs[i]);
695 if (filter->filter->priv_class)
696 av_opt_free(filter->priv);
698 av_freep(&filter->name);
699 av_freep(&filter->input_pads);
700 av_freep(&filter->output_pads);
701 av_freep(&filter->inputs);
702 av_freep(&filter->outputs);
703 av_freep(&filter->priv);
704 while(filter->command_queue){
705 ff_command_queue_pop(filter);
708 av_expr_free(filter->enable);
709 filter->enable = NULL;
710 av_freep(&filter->var_values);
711 av_freep(&filter->internal);
715 static int process_options(AVFilterContext *ctx, AVDictionary **options,
718 const AVOption *o = NULL;
720 char *av_uninit(parsed_key), *av_uninit(value);
728 const char *shorthand = NULL;
730 o = av_opt_next(ctx->priv, o);
732 if (o->type == AV_OPT_TYPE_CONST || o->offset == offset)
738 ret = av_opt_get_key_value(&args, "=", ":",
739 shorthand ? AV_OPT_FLAG_IMPLICIT_KEY : 0,
740 &parsed_key, &value);
742 if (ret == AVERROR(EINVAL))
743 av_log(ctx, AV_LOG_ERROR, "No option name near '%s'\n", args);
745 av_log(ctx, AV_LOG_ERROR, "Unable to parse '%s': %s\n", args,
753 while ((o = av_opt_next(ctx->priv, o))); /* discard all remaining shorthand */
758 av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value);
760 if (av_opt_find(ctx, key, NULL, 0, 0)) {
761 ret = av_opt_set(ctx, key, value, 0);
768 av_dict_set(options, key, value, 0);
769 if ((ret = av_opt_set(ctx->priv, key, value, 0)) < 0) {
770 if (!av_opt_find(ctx->priv, key, NULL, 0, AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ)) {
771 if (ret == AVERROR_OPTION_NOT_FOUND)
772 av_log(ctx, AV_LOG_ERROR, "Option '%s' not found\n", key);
785 if (ctx->enable_str) {
786 ret = set_enable_expr(ctx, ctx->enable_str);
793 #if FF_API_AVFILTER_INIT_FILTER
794 int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
796 return avfilter_init_str(filter, args);
800 int avfilter_init_dict(AVFilterContext *ctx, AVDictionary **options)
804 ret = av_opt_set_dict(ctx, options);
806 av_log(ctx, AV_LOG_ERROR, "Error applying generic filter options.\n");
810 if (ctx->filter->flags & AVFILTER_FLAG_SLICE_THREADS &&
811 ctx->thread_type & ctx->graph->thread_type & AVFILTER_THREAD_SLICE &&
812 ctx->graph->internal->thread_execute) {
813 ctx->thread_type = AVFILTER_THREAD_SLICE;
814 ctx->internal->execute = ctx->graph->internal->thread_execute;
816 ctx->thread_type = 0;
819 if (ctx->filter->priv_class) {
820 ret = av_opt_set_dict(ctx->priv, options);
822 av_log(ctx, AV_LOG_ERROR, "Error applying options to the filter.\n");
827 if (ctx->filter->init_opaque)
828 ret = ctx->filter->init_opaque(ctx, NULL);
829 else if (ctx->filter->init)
830 ret = ctx->filter->init(ctx);
831 else if (ctx->filter->init_dict)
832 ret = ctx->filter->init_dict(ctx, options);
837 int avfilter_init_str(AVFilterContext *filter, const char *args)
839 AVDictionary *options = NULL;
840 AVDictionaryEntry *e;
844 if (!filter->filter->priv_class) {
845 av_log(filter, AV_LOG_ERROR, "This filter does not take any "
846 "options, but options were provided: %s.\n", args);
847 return AVERROR(EINVAL);
850 #if FF_API_OLD_FILTER_OPTS
851 if ( !strcmp(filter->filter->name, "format") ||
852 !strcmp(filter->filter->name, "noformat") ||
853 !strcmp(filter->filter->name, "frei0r") ||
854 !strcmp(filter->filter->name, "frei0r_src") ||
855 !strcmp(filter->filter->name, "ocv") ||
856 !strcmp(filter->filter->name, "pan") ||
857 !strcmp(filter->filter->name, "pp") ||
858 !strcmp(filter->filter->name, "aevalsrc")) {
859 /* a hack for compatibility with the old syntax
860 * replace colons with |s */
861 char *copy = av_strdup(args);
863 int nb_leading = 0; // number of leading colons to skip
867 ret = AVERROR(ENOMEM);
871 if (!strcmp(filter->filter->name, "frei0r") ||
872 !strcmp(filter->filter->name, "ocv"))
874 else if (!strcmp(filter->filter->name, "frei0r_src"))
877 while (nb_leading--) {
880 p = copy + strlen(copy);
886 deprecated = strchr(p, ':') != NULL;
888 if (!strcmp(filter->filter->name, "aevalsrc")) {
890 while ((p = strchr(p, ':')) && p[1] != ':') {
891 const char *epos = strchr(p + 1, '=');
892 const char *spos = strchr(p + 1, ':');
893 const int next_token_is_opt = epos && (!spos || epos < spos);
894 if (next_token_is_opt) {
898 /* next token does not contain a '=', assume a channel expression */
902 if (p && *p == ':') { // double sep '::' found
904 memmove(p, p + 1, strlen(p));
907 while ((p = strchr(p, ':')))
911 av_log(filter, AV_LOG_WARNING, "This syntax is deprecated. Use "
912 "'|' to separate the list items.\n");
914 av_log(filter, AV_LOG_DEBUG, "compat: called with args=[%s]\n", copy);
915 ret = process_options(filter, &options, copy);
923 if (!strcmp(filter->filter->name, "mp")) {
926 if (!strncmp(args, "filter=", 7))
928 ret = av_escape(&escaped, args, ":=", AV_ESCAPE_MODE_BACKSLASH, 0);
930 av_log(filter, AV_LOG_ERROR, "Unable to escape MPlayer filters arg '%s'\n", args);
933 ret = process_options(filter, &options, escaped);
937 ret = process_options(filter, &options, args);
943 ret = avfilter_init_dict(filter, &options);
947 if ((e = av_dict_get(options, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
948 av_log(filter, AV_LOG_ERROR, "No such option: %s.\n", e->key);
949 ret = AVERROR_OPTION_NOT_FOUND;
954 av_dict_free(&options);
959 const char *avfilter_pad_get_name(const AVFilterPad *pads, int pad_idx)
961 return pads[pad_idx].name;
964 enum AVMediaType avfilter_pad_get_type(const AVFilterPad *pads, int pad_idx)
966 return pads[pad_idx].type;
969 static int default_filter_frame(AVFilterLink *link, AVFrame *frame)
971 return ff_filter_frame(link->dst->outputs[0], frame);
974 static int ff_filter_frame_framed(AVFilterLink *link, AVFrame *frame)
976 int (*filter_frame)(AVFilterLink *, AVFrame *);
977 AVFilterContext *dstctx = link->dst;
978 AVFilterPad *dst = link->dstpad;
981 AVFilterCommand *cmd= link->dst->command_queue;
985 av_frame_free(&frame);
989 if (!(filter_frame = dst->filter_frame))
990 filter_frame = default_filter_frame;
992 /* copy the frame if needed */
993 if (dst->needs_writable && !av_frame_is_writable(frame)) {
994 av_log(link->dst, AV_LOG_DEBUG, "Copying data in avfilter.\n");
996 /* Maybe use ff_copy_buffer_ref instead? */
997 switch (link->type) {
998 case AVMEDIA_TYPE_VIDEO:
999 out = ff_get_video_buffer(link, link->w, link->h);
1001 case AVMEDIA_TYPE_AUDIO:
1002 out = ff_get_audio_buffer(link, frame->nb_samples);
1004 default: return AVERROR(EINVAL);
1007 av_frame_free(&frame);
1008 return AVERROR(ENOMEM);
1010 av_frame_copy_props(out, frame);
1012 switch (link->type) {
1013 case AVMEDIA_TYPE_VIDEO:
1014 av_image_copy(out->data, out->linesize, (const uint8_t **)frame->data, frame->linesize,
1015 frame->format, frame->width, frame->height);
1017 case AVMEDIA_TYPE_AUDIO:
1018 av_samples_copy(out->extended_data, frame->extended_data,
1019 0, 0, frame->nb_samples,
1020 av_get_channel_layout_nb_channels(frame->channel_layout),
1023 default: return AVERROR(EINVAL);
1026 av_frame_free(&frame);
1030 while(cmd && cmd->time <= out->pts * av_q2d(link->time_base)){
1031 av_log(link->dst, AV_LOG_DEBUG,
1032 "Processing command time:%f command:%s arg:%s\n",
1033 cmd->time, cmd->command, cmd->arg);
1034 avfilter_process_command(link->dst, cmd->command, cmd->arg, 0, 0, cmd->flags);
1035 ff_command_queue_pop(link->dst);
1036 cmd= link->dst->command_queue;
1040 if (dstctx->enable_str) {
1041 int64_t pos = av_frame_get_pkt_pos(out);
1042 dstctx->var_values[VAR_N] = link->frame_count;
1043 dstctx->var_values[VAR_T] = pts == AV_NOPTS_VALUE ? NAN : pts * av_q2d(link->time_base);
1044 dstctx->var_values[VAR_POS] = pos == -1 ? NAN : pos;
1046 dstctx->is_disabled = !av_expr_eval(dstctx->enable, dstctx->var_values, NULL);
1047 if (dstctx->is_disabled &&
1048 (dstctx->filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC))
1049 filter_frame = default_filter_frame;
1051 ret = filter_frame(link, out);
1052 link->frame_count++;
1053 link->frame_requested = 0;
1054 ff_update_link_current_pts(link, pts);
1058 static int ff_filter_frame_needs_framing(AVFilterLink *link, AVFrame *frame)
1060 int insamples = frame->nb_samples, inpos = 0, nb_samples;
1061 AVFrame *pbuf = link->partial_buf;
1062 int nb_channels = av_frame_get_channels(frame);
1065 link->flags |= FF_LINK_FLAG_REQUEST_LOOP;
1066 /* Handle framing (min_samples, max_samples) */
1069 AVRational samples_tb = { 1, link->sample_rate };
1070 pbuf = ff_get_audio_buffer(link, link->partial_buf_size);
1072 av_log(link->dst, AV_LOG_WARNING,
1073 "Samples dropped due to memory allocation failure.\n");
1076 av_frame_copy_props(pbuf, frame);
1077 pbuf->pts = frame->pts +
1078 av_rescale_q(inpos, samples_tb, link->time_base);
1079 pbuf->nb_samples = 0;
1081 nb_samples = FFMIN(insamples,
1082 link->partial_buf_size - pbuf->nb_samples);
1083 av_samples_copy(pbuf->extended_data, frame->extended_data,
1084 pbuf->nb_samples, inpos,
1085 nb_samples, nb_channels, link->format);
1086 inpos += nb_samples;
1087 insamples -= nb_samples;
1088 pbuf->nb_samples += nb_samples;
1089 if (pbuf->nb_samples >= link->min_samples) {
1090 ret = ff_filter_frame_framed(link, pbuf);
1094 av_frame_free(&frame);
1095 link->partial_buf = pbuf;
1099 int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
1101 FF_TPRINTF_START(NULL, filter_frame); ff_tlog_link(NULL, link, 1); ff_tlog(NULL, " "); ff_tlog_ref(NULL, frame, 1);
1103 /* Consistency checks */
1104 if (link->type == AVMEDIA_TYPE_VIDEO) {
1105 if (strcmp(link->dst->filter->name, "scale")) {
1106 av_assert1(frame->format == link->format);
1107 av_assert1(frame->width == link->w);
1108 av_assert1(frame->height == link->h);
1111 av_assert1(frame->format == link->format);
1112 av_assert1(av_frame_get_channels(frame) == link->channels);
1113 av_assert1(frame->channel_layout == link->channel_layout);
1114 av_assert1(frame->sample_rate == link->sample_rate);
1117 /* Go directly to actual filtering if possible */
1118 if (link->type == AVMEDIA_TYPE_AUDIO &&
1119 link->min_samples &&
1120 (link->partial_buf ||
1121 frame->nb_samples < link->min_samples ||
1122 frame->nb_samples > link->max_samples)) {
1123 return ff_filter_frame_needs_framing(link, frame);
1125 return ff_filter_frame_framed(link, frame);
1129 const AVClass *avfilter_get_class(void)
1131 return &avfilter_class;