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/opt.h"
30 #include "libavutil/pixdesc.h"
31 #include "libavutil/rational.h"
32 #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 void ff_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
97 AVFilterPad **pads, AVFilterLink ***links,
102 idx = FFMIN(idx, *count);
104 *pads = av_realloc(*pads, sizeof(AVFilterPad) * (*count + 1));
105 *links = av_realloc(*links, sizeof(AVFilterLink*) * (*count + 1));
106 memmove(*pads + idx + 1, *pads + idx, sizeof(AVFilterPad) * (*count - idx));
107 memmove(*links + idx + 1, *links + idx, sizeof(AVFilterLink*) * (*count - idx));
108 memcpy(*pads + idx, newpad, sizeof(AVFilterPad));
109 (*links)[idx] = NULL;
112 for (i = idx + 1; i < *count; i++)
114 (*(unsigned *)((uint8_t *) *links[i] + padidx_off))++;
117 int avfilter_link(AVFilterContext *src, unsigned srcpad,
118 AVFilterContext *dst, unsigned dstpad)
122 if (src->nb_outputs <= srcpad || dst->nb_inputs <= dstpad ||
123 src->outputs[srcpad] || dst->inputs[dstpad])
126 if (src->output_pads[srcpad].type != dst->input_pads[dstpad].type) {
127 av_log(src, AV_LOG_ERROR,
128 "Media type mismatch between the '%s' filter output pad %d (%s) and the '%s' filter input pad %d (%s)\n",
129 src->name, srcpad, (char *)av_x_if_null(av_get_media_type_string(src->output_pads[srcpad].type), "?"),
130 dst->name, dstpad, (char *)av_x_if_null(av_get_media_type_string(dst-> input_pads[dstpad].type), "?"));
131 return AVERROR(EINVAL);
134 link = av_mallocz(sizeof(*link));
136 return AVERROR(ENOMEM);
138 src->outputs[srcpad] = dst->inputs[dstpad] = link;
142 link->srcpad = &src->output_pads[srcpad];
143 link->dstpad = &dst->input_pads[dstpad];
144 link->type = src->output_pads[srcpad].type;
145 av_assert0(AV_PIX_FMT_NONE == -1 && AV_SAMPLE_FMT_NONE == -1);
151 void avfilter_link_free(AVFilterLink **link)
156 av_frame_free(&(*link)->partial_buf);
161 int avfilter_link_get_channels(AVFilterLink *link)
163 return link->channels;
166 void avfilter_link_set_closed(AVFilterLink *link, int closed)
168 link->closed = closed;
171 int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
172 unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
175 unsigned dstpad_idx = link->dstpad - link->dst->input_pads;
177 av_log(link->dst, AV_LOG_VERBOSE, "auto-inserting filter '%s' "
178 "between the filter '%s' and the filter '%s'\n",
179 filt->name, link->src->name, link->dst->name);
181 link->dst->inputs[dstpad_idx] = NULL;
182 if ((ret = avfilter_link(filt, filt_dstpad_idx, link->dst, dstpad_idx)) < 0) {
183 /* failed to link output filter to new filter */
184 link->dst->inputs[dstpad_idx] = link;
188 /* re-hookup the link to the new destination filter we inserted */
190 link->dstpad = &filt->input_pads[filt_srcpad_idx];
191 filt->inputs[filt_srcpad_idx] = link;
193 /* if any information on supported media formats already exists on the
194 * link, we need to preserve that */
195 if (link->out_formats)
196 ff_formats_changeref(&link->out_formats,
197 &filt->outputs[filt_dstpad_idx]->out_formats);
198 if (link->out_samplerates)
199 ff_formats_changeref(&link->out_samplerates,
200 &filt->outputs[filt_dstpad_idx]->out_samplerates);
201 if (link->out_channel_layouts)
202 ff_channel_layouts_changeref(&link->out_channel_layouts,
203 &filt->outputs[filt_dstpad_idx]->out_channel_layouts);
208 int avfilter_config_links(AVFilterContext *filter)
210 int (*config_link)(AVFilterLink *);
214 for (i = 0; i < filter->nb_inputs; i ++) {
215 AVFilterLink *link = filter->inputs[i];
216 AVFilterLink *inlink;
220 inlink = link->src->nb_inputs ? link->src->inputs[0] : NULL;
221 link->current_pts = AV_NOPTS_VALUE;
223 switch (link->init_state) {
226 case AVLINK_STARTINIT:
227 av_log(filter, AV_LOG_INFO, "circular filter chain detected\n");
230 link->init_state = AVLINK_STARTINIT;
232 if ((ret = avfilter_config_links(link->src)) < 0)
235 if (!(config_link = link->srcpad->config_props)) {
236 if (link->src->nb_inputs != 1) {
237 av_log(link->src, AV_LOG_ERROR, "Source filters and filters "
238 "with more than one input "
239 "must set config_props() "
240 "callbacks on all outputs\n");
241 return AVERROR(EINVAL);
243 } else if ((ret = config_link(link)) < 0) {
244 av_log(link->src, AV_LOG_ERROR,
245 "Failed to configure output pad on %s\n",
250 switch (link->type) {
251 case AVMEDIA_TYPE_VIDEO:
252 if (!link->time_base.num && !link->time_base.den)
253 link->time_base = inlink ? inlink->time_base : AV_TIME_BASE_Q;
255 if (!link->sample_aspect_ratio.num && !link->sample_aspect_ratio.den)
256 link->sample_aspect_ratio = inlink ?
257 inlink->sample_aspect_ratio : (AVRational){1,1};
259 if (inlink && !link->frame_rate.num && !link->frame_rate.den)
260 link->frame_rate = inlink->frame_rate;
267 } else if (!link->w || !link->h) {
268 av_log(link->src, AV_LOG_ERROR,
269 "Video source filters must set their output link's "
270 "width and height\n");
271 return AVERROR(EINVAL);
275 case AVMEDIA_TYPE_AUDIO:
277 if (!link->time_base.num && !link->time_base.den)
278 link->time_base = inlink->time_base;
281 if (!link->time_base.num && !link->time_base.den)
282 link->time_base = (AVRational) {1, link->sample_rate};
285 if ((config_link = link->dstpad->config_props))
286 if ((ret = config_link(link)) < 0) {
287 av_log(link->src, AV_LOG_ERROR,
288 "Failed to configure input pad on %s\n",
293 link->init_state = AVLINK_INIT;
300 void ff_tlog_link(void *ctx, AVFilterLink *link, int end)
302 if (link->type == AVMEDIA_TYPE_VIDEO) {
304 "link[%p s:%dx%d fmt:%s %s->%s]%s",
305 link, link->w, link->h,
306 av_get_pix_fmt_name(link->format),
307 link->src ? link->src->filter->name : "",
308 link->dst ? link->dst->filter->name : "",
312 av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);
315 "link[%p r:%d cl:%s fmt:%s %s->%s]%s",
316 link, (int)link->sample_rate, buf,
317 av_get_sample_fmt_name(link->format),
318 link->src ? link->src->filter->name : "",
319 link->dst ? link->dst->filter->name : "",
324 int ff_request_frame(AVFilterLink *link)
327 FF_TPRINTF_START(NULL, request_frame); ff_tlog_link(NULL, link, 1);
331 av_assert0(!link->frame_requested);
332 link->frame_requested = 1;
333 while (link->frame_requested) {
334 if (link->srcpad->request_frame)
335 ret = link->srcpad->request_frame(link);
336 else if (link->src->inputs[0])
337 ret = ff_request_frame(link->src->inputs[0]);
338 if (ret == AVERROR_EOF && link->partial_buf) {
339 AVFrame *pbuf = link->partial_buf;
340 link->partial_buf = NULL;
341 ret = ff_filter_frame_framed(link, pbuf);
344 link->frame_requested = 0;
345 if (ret == AVERROR_EOF)
348 av_assert0(!link->frame_requested ||
349 link->flags & FF_LINK_FLAG_REQUEST_LOOP);
355 int ff_poll_frame(AVFilterLink *link)
357 int i, min = INT_MAX;
359 if (link->srcpad->poll_frame)
360 return link->srcpad->poll_frame(link);
362 for (i = 0; i < link->src->nb_inputs; i++) {
364 if (!link->src->inputs[i])
366 val = ff_poll_frame(link->src->inputs[i]);
367 min = FFMIN(min, val);
373 static const char *const var_names[] = { "t", "n", "pos", NULL };
374 enum { VAR_T, VAR_N, VAR_POS, VAR_VARS_NB };
376 static int set_enable_expr(AVFilterContext *ctx, const char *expr)
380 AVExpr *old = ctx->enable;
382 if (!(ctx->filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE)) {
383 av_log(ctx, AV_LOG_ERROR, "Timeline ('enable' option) not supported "
384 "with filter '%s'\n", ctx->filter->name);
385 return AVERROR_PATCHWELCOME;
388 expr_dup = av_strdup(expr);
390 return AVERROR(ENOMEM);
392 if (!ctx->var_values) {
393 ctx->var_values = av_calloc(VAR_VARS_NB, sizeof(*ctx->var_values));
394 if (!ctx->var_values) {
396 return AVERROR(ENOMEM);
400 ret = av_expr_parse((AVExpr**)&ctx->enable, expr_dup, var_names,
401 NULL, NULL, NULL, NULL, 0, ctx->priv);
403 av_log(ctx->priv, AV_LOG_ERROR,
404 "Error when evaluating the expression '%s' for enable\n",
411 av_free(ctx->enable_str);
412 ctx->enable_str = expr_dup;
416 void ff_update_link_current_pts(AVFilterLink *link, int64_t pts)
418 if (pts == AV_NOPTS_VALUE)
420 link->current_pts = av_rescale_q(pts, link->time_base, AV_TIME_BASE_Q);
421 /* TODO use duration */
422 if (link->graph && link->age_index >= 0)
423 ff_avfilter_graph_update_heap(link->graph, link);
426 int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags)
428 if(!strcmp(cmd, "ping")){
429 av_strlcatf(res, res_len, "pong from:%s %s\n", filter->filter->name, filter->name);
431 }else if(!strcmp(cmd, "enable")) {
432 return set_enable_expr(filter, arg);
433 }else if(filter->filter->process_command) {
434 return filter->filter->process_command(filter, cmd, arg, res, res_len, flags);
436 return AVERROR(ENOSYS);
439 static AVFilter *first_filter;
441 AVFilter *avfilter_get_by_name(const char *name)
443 const AVFilter *f = NULL;
448 while ((f = avfilter_next(f)))
449 if (!strcmp(f->name, name))
450 return (AVFilter *)f;
455 int avfilter_register(AVFilter *filter)
457 AVFilter **f = &first_filter;
460 /* the filter must select generic or internal exclusively */
461 av_assert0((filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE) != AVFILTER_FLAG_SUPPORT_TIMELINE);
463 for(i=0; filter->inputs && filter->inputs[i].name; i++) {
464 const AVFilterPad *input = &filter->inputs[i];
465 av_assert0( !input->filter_frame
466 || (!input->start_frame && !input->end_frame));
471 while(avpriv_atomic_ptr_cas((void * volatile *)f, NULL, filter))
477 const AVFilter *avfilter_next(const AVFilter *prev)
479 return prev ? prev->next : first_filter;
482 #if FF_API_OLD_FILTER_REGISTER
483 AVFilter **av_filter_next(AVFilter **filter)
485 return filter ? &(*filter)->next : &first_filter;
488 void avfilter_uninit(void)
493 int avfilter_pad_count(const AVFilterPad *pads)
500 for (count = 0; pads->name; count++)
505 static const char *default_filter_name(void *filter_ctx)
507 AVFilterContext *ctx = filter_ctx;
508 return ctx->name ? ctx->name : ctx->filter->name;
511 static void *filter_child_next(void *obj, void *prev)
513 AVFilterContext *ctx = obj;
514 if (!prev && ctx->filter && ctx->filter->priv_class && ctx->priv)
519 static const AVClass *filter_child_class_next(const AVClass *prev)
521 const AVFilter *f = NULL;
523 /* find the filter that corresponds to prev */
524 while (prev && (f = avfilter_next(f)))
525 if (f->priv_class == prev)
528 /* could not find filter corresponding to prev */
532 /* find next filter with specific options */
533 while ((f = avfilter_next(f)))
535 return f->priv_class;
540 #define OFFSET(x) offsetof(AVFilterContext, x)
541 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM
542 static const AVOption avfilter_options[] = {
543 { "thread_type", "Allowed thread types", OFFSET(thread_type), AV_OPT_TYPE_FLAGS,
544 { .i64 = AVFILTER_THREAD_SLICE }, 0, INT_MAX, FLAGS, "thread_type" },
545 { "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .unit = "thread_type" },
546 { "enable", "set enable expression", OFFSET(enable_str), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
550 static const AVClass avfilter_class = {
551 .class_name = "AVFilter",
552 .item_name = default_filter_name,
553 .version = LIBAVUTIL_VERSION_INT,
554 .category = AV_CLASS_CATEGORY_FILTER,
555 .child_next = filter_child_next,
556 .child_class_next = filter_child_class_next,
557 .option = avfilter_options,
560 static int default_execute(AVFilterContext *ctx, action_func *func, void *arg,
561 int *ret, int nb_jobs)
565 for (i = 0; i < nb_jobs; i++) {
566 int r = func(ctx, arg, i, nb_jobs);
573 AVFilterContext *ff_filter_alloc(const AVFilter *filter, const char *inst_name)
575 AVFilterContext *ret;
580 ret = av_mallocz(sizeof(AVFilterContext));
584 ret->av_class = &avfilter_class;
585 ret->filter = filter;
586 ret->name = inst_name ? av_strdup(inst_name) : NULL;
587 if (filter->priv_size) {
588 ret->priv = av_mallocz(filter->priv_size);
593 av_opt_set_defaults(ret);
594 if (filter->priv_class) {
595 *(const AVClass**)ret->priv = filter->priv_class;
596 av_opt_set_defaults(ret->priv);
599 ret->internal = av_mallocz(sizeof(*ret->internal));
602 ret->internal->execute = default_execute;
604 ret->nb_inputs = avfilter_pad_count(filter->inputs);
605 if (ret->nb_inputs ) {
606 ret->input_pads = av_malloc(sizeof(AVFilterPad) * ret->nb_inputs);
607 if (!ret->input_pads)
609 memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->nb_inputs);
610 ret->inputs = av_mallocz(sizeof(AVFilterLink*) * ret->nb_inputs);
615 ret->nb_outputs = avfilter_pad_count(filter->outputs);
616 if (ret->nb_outputs) {
617 ret->output_pads = av_malloc(sizeof(AVFilterPad) * ret->nb_outputs);
618 if (!ret->output_pads)
620 memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->nb_outputs);
621 ret->outputs = av_mallocz(sizeof(AVFilterLink*) * ret->nb_outputs);
626 ret->output_count = ret->nb_outputs;
627 ret->input_count = ret->nb_inputs;
633 av_freep(&ret->inputs);
634 av_freep(&ret->input_pads);
636 av_freep(&ret->outputs);
637 av_freep(&ret->output_pads);
639 av_freep(&ret->priv);
640 av_freep(&ret->internal);
645 #if FF_API_AVFILTER_OPEN
646 int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
648 *filter_ctx = ff_filter_alloc(filter, inst_name);
649 return *filter_ctx ? 0 : AVERROR(ENOMEM);
653 static void free_link(AVFilterLink *link)
659 link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
661 link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
663 ff_formats_unref(&link->in_formats);
664 ff_formats_unref(&link->out_formats);
665 ff_formats_unref(&link->in_samplerates);
666 ff_formats_unref(&link->out_samplerates);
667 ff_channel_layouts_unref(&link->in_channel_layouts);
668 ff_channel_layouts_unref(&link->out_channel_layouts);
669 avfilter_link_free(&link);
672 void avfilter_free(AVFilterContext *filter)
680 ff_filter_graph_remove_filter(filter->graph, filter);
682 if (filter->filter->uninit)
683 filter->filter->uninit(filter);
685 for (i = 0; i < filter->nb_inputs; i++) {
686 free_link(filter->inputs[i]);
688 for (i = 0; i < filter->nb_outputs; i++) {
689 free_link(filter->outputs[i]);
692 if (filter->filter->priv_class)
693 av_opt_free(filter->priv);
695 av_freep(&filter->name);
696 av_freep(&filter->input_pads);
697 av_freep(&filter->output_pads);
698 av_freep(&filter->inputs);
699 av_freep(&filter->outputs);
700 av_freep(&filter->priv);
701 while(filter->command_queue){
702 ff_command_queue_pop(filter);
705 av_expr_free(filter->enable);
706 filter->enable = NULL;
707 av_freep(&filter->var_values);
708 av_freep(&filter->internal);
712 static int process_options(AVFilterContext *ctx, AVDictionary **options,
715 const AVOption *o = NULL;
717 char *av_uninit(parsed_key), *av_uninit(value);
725 const char *shorthand = NULL;
727 o = av_opt_next(ctx->priv, o);
729 if (o->type == AV_OPT_TYPE_CONST || o->offset == offset)
735 ret = av_opt_get_key_value(&args, "=", ":",
736 shorthand ? AV_OPT_FLAG_IMPLICIT_KEY : 0,
737 &parsed_key, &value);
739 if (ret == AVERROR(EINVAL))
740 av_log(ctx, AV_LOG_ERROR, "No option name near '%s'\n", args);
742 av_log(ctx, AV_LOG_ERROR, "Unable to parse '%s': %s\n", args,
750 while ((o = av_opt_next(ctx->priv, o))); /* discard all remaining shorthand */
755 av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value);
757 if (av_opt_find(ctx, key, NULL, 0, 0)) {
758 ret = av_opt_set(ctx, key, value, 0);
765 av_dict_set(options, key, value, 0);
766 if ((ret = av_opt_set(ctx->priv, key, value, 0)) < 0) {
767 if (!av_opt_find(ctx->priv, key, NULL, 0, AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ)) {
768 if (ret == AVERROR_OPTION_NOT_FOUND)
769 av_log(ctx, AV_LOG_ERROR, "Option '%s' not found\n", key);
782 if (ctx->enable_str) {
783 ret = set_enable_expr(ctx, ctx->enable_str);
790 #if FF_API_AVFILTER_INIT_FILTER
791 int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
793 return avfilter_init_str(filter, args);
797 int avfilter_init_dict(AVFilterContext *ctx, AVDictionary **options)
801 ret = av_opt_set_dict(ctx, options);
803 av_log(ctx, AV_LOG_ERROR, "Error applying generic filter options.\n");
807 if (ctx->filter->flags & AVFILTER_FLAG_SLICE_THREADS &&
808 ctx->thread_type & ctx->graph->thread_type & AVFILTER_THREAD_SLICE &&
809 ctx->graph->internal->thread_execute) {
810 ctx->thread_type = AVFILTER_THREAD_SLICE;
811 ctx->internal->execute = ctx->graph->internal->thread_execute;
813 ctx->thread_type = 0;
816 if (ctx->filter->priv_class) {
817 ret = av_opt_set_dict(ctx->priv, options);
819 av_log(ctx, AV_LOG_ERROR, "Error applying options to the filter.\n");
824 if (ctx->filter->init_opaque)
825 ret = ctx->filter->init_opaque(ctx, NULL);
826 else if (ctx->filter->init)
827 ret = ctx->filter->init(ctx);
828 else if (ctx->filter->init_dict)
829 ret = ctx->filter->init_dict(ctx, options);
834 int avfilter_init_str(AVFilterContext *filter, const char *args)
836 AVDictionary *options = NULL;
837 AVDictionaryEntry *e;
841 if (!filter->filter->priv_class) {
842 av_log(filter, AV_LOG_ERROR, "This filter does not take any "
843 "options, but options were provided: %s.\n", args);
844 return AVERROR(EINVAL);
847 #if FF_API_OLD_FILTER_OPTS
848 if ( !strcmp(filter->filter->name, "format") ||
849 !strcmp(filter->filter->name, "noformat") ||
850 !strcmp(filter->filter->name, "frei0r") ||
851 !strcmp(filter->filter->name, "frei0r_src") ||
852 !strcmp(filter->filter->name, "ocv") ||
853 !strcmp(filter->filter->name, "pan") ||
854 !strcmp(filter->filter->name, "pp") ||
855 !strcmp(filter->filter->name, "aevalsrc")) {
856 /* a hack for compatibility with the old syntax
857 * replace colons with |s */
858 char *copy = av_strdup(args);
860 int nb_leading = 0; // number of leading colons to skip
864 ret = AVERROR(ENOMEM);
868 if (!strcmp(filter->filter->name, "frei0r") ||
869 !strcmp(filter->filter->name, "ocv"))
871 else if (!strcmp(filter->filter->name, "frei0r_src"))
874 while (nb_leading--) {
877 p = copy + strlen(copy);
883 deprecated = strchr(p, ':') != NULL;
885 if (!strcmp(filter->filter->name, "aevalsrc")) {
887 while ((p = strchr(p, ':')) && p[1] != ':') {
888 const char *epos = strchr(p + 1, '=');
889 const char *spos = strchr(p + 1, ':');
890 const int next_token_is_opt = epos && (!spos || epos < spos);
891 if (next_token_is_opt) {
895 /* next token does not contain a '=', assume a channel expression */
899 if (p && *p == ':') { // double sep '::' found
901 memmove(p, p + 1, strlen(p));
904 while ((p = strchr(p, ':')))
908 av_log(filter, AV_LOG_WARNING, "This syntax is deprecated. Use "
909 "'|' to separate the list items.\n");
911 av_log(filter, AV_LOG_DEBUG, "compat: called with args=[%s]\n", copy);
912 ret = process_options(filter, &options, copy);
920 if (!strcmp(filter->filter->name, "mp")) {
923 if (!strncmp(args, "filter=", 7))
925 ret = av_escape(&escaped, args, ":=", AV_ESCAPE_MODE_BACKSLASH, 0);
927 av_log(filter, AV_LOG_ERROR, "Unable to escape MPlayer filters arg '%s'\n", args);
930 ret = process_options(filter, &options, escaped);
934 ret = process_options(filter, &options, args);
940 ret = avfilter_init_dict(filter, &options);
944 if ((e = av_dict_get(options, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
945 av_log(filter, AV_LOG_ERROR, "No such option: %s.\n", e->key);
946 ret = AVERROR_OPTION_NOT_FOUND;
951 av_dict_free(&options);
956 const char *avfilter_pad_get_name(const AVFilterPad *pads, int pad_idx)
958 return pads[pad_idx].name;
961 enum AVMediaType avfilter_pad_get_type(const AVFilterPad *pads, int pad_idx)
963 return pads[pad_idx].type;
966 static int default_filter_frame(AVFilterLink *link, AVFrame *frame)
968 return ff_filter_frame(link->dst->outputs[0], frame);
971 static int ff_filter_frame_framed(AVFilterLink *link, AVFrame *frame)
973 int (*filter_frame)(AVFilterLink *, AVFrame *);
974 AVFilterContext *dstctx = link->dst;
975 AVFilterPad *dst = link->dstpad;
978 AVFilterCommand *cmd= link->dst->command_queue;
982 av_frame_free(&frame);
986 if (!(filter_frame = dst->filter_frame))
987 filter_frame = default_filter_frame;
989 /* copy the frame if needed */
990 if (dst->needs_writable && !av_frame_is_writable(frame)) {
991 av_log(link->dst, AV_LOG_DEBUG, "Copying data in avfilter.\n");
993 /* Maybe use ff_copy_buffer_ref instead? */
994 switch (link->type) {
995 case AVMEDIA_TYPE_VIDEO:
996 out = ff_get_video_buffer(link, link->w, link->h);
998 case AVMEDIA_TYPE_AUDIO:
999 out = ff_get_audio_buffer(link, frame->nb_samples);
1001 default: return AVERROR(EINVAL);
1004 av_frame_free(&frame);
1005 return AVERROR(ENOMEM);
1007 av_frame_copy_props(out, frame);
1009 switch (link->type) {
1010 case AVMEDIA_TYPE_VIDEO:
1011 av_image_copy(out->data, out->linesize, (const uint8_t **)frame->data, frame->linesize,
1012 frame->format, frame->width, frame->height);
1014 case AVMEDIA_TYPE_AUDIO:
1015 av_samples_copy(out->extended_data, frame->extended_data,
1016 0, 0, frame->nb_samples,
1017 av_get_channel_layout_nb_channels(frame->channel_layout),
1020 default: return AVERROR(EINVAL);
1023 av_frame_free(&frame);
1027 while(cmd && cmd->time <= out->pts * av_q2d(link->time_base)){
1028 av_log(link->dst, AV_LOG_DEBUG,
1029 "Processing command time:%f command:%s arg:%s\n",
1030 cmd->time, cmd->command, cmd->arg);
1031 avfilter_process_command(link->dst, cmd->command, cmd->arg, 0, 0, cmd->flags);
1032 ff_command_queue_pop(link->dst);
1033 cmd= link->dst->command_queue;
1037 if (dstctx->enable_str) {
1038 int64_t pos = av_frame_get_pkt_pos(out);
1039 dstctx->var_values[VAR_N] = link->frame_count;
1040 dstctx->var_values[VAR_T] = pts == AV_NOPTS_VALUE ? NAN : pts * av_q2d(link->time_base);
1041 dstctx->var_values[VAR_POS] = pos == -1 ? NAN : pos;
1043 dstctx->is_disabled = !av_expr_eval(dstctx->enable, dstctx->var_values, NULL);
1044 if (dstctx->is_disabled &&
1045 (dstctx->filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC))
1046 filter_frame = default_filter_frame;
1048 ret = filter_frame(link, out);
1049 link->frame_count++;
1050 link->frame_requested = 0;
1051 ff_update_link_current_pts(link, pts);
1055 static int ff_filter_frame_needs_framing(AVFilterLink *link, AVFrame *frame)
1057 int insamples = frame->nb_samples, inpos = 0, nb_samples;
1058 AVFrame *pbuf = link->partial_buf;
1059 int nb_channels = av_frame_get_channels(frame);
1062 link->flags |= FF_LINK_FLAG_REQUEST_LOOP;
1063 /* Handle framing (min_samples, max_samples) */
1066 AVRational samples_tb = { 1, link->sample_rate };
1067 pbuf = ff_get_audio_buffer(link, link->partial_buf_size);
1069 av_log(link->dst, AV_LOG_WARNING,
1070 "Samples dropped due to memory allocation failure.\n");
1073 av_frame_copy_props(pbuf, frame);
1074 pbuf->pts = frame->pts +
1075 av_rescale_q(inpos, samples_tb, link->time_base);
1076 pbuf->nb_samples = 0;
1078 nb_samples = FFMIN(insamples,
1079 link->partial_buf_size - pbuf->nb_samples);
1080 av_samples_copy(pbuf->extended_data, frame->extended_data,
1081 pbuf->nb_samples, inpos,
1082 nb_samples, nb_channels, link->format);
1083 inpos += nb_samples;
1084 insamples -= nb_samples;
1085 pbuf->nb_samples += nb_samples;
1086 if (pbuf->nb_samples >= link->min_samples) {
1087 ret = ff_filter_frame_framed(link, pbuf);
1091 av_frame_free(&frame);
1092 link->partial_buf = pbuf;
1096 int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
1098 FF_TPRINTF_START(NULL, filter_frame); ff_tlog_link(NULL, link, 1); ff_tlog(NULL, " "); ff_tlog_ref(NULL, frame, 1);
1100 /* Consistency checks */
1101 if (link->type == AVMEDIA_TYPE_VIDEO) {
1102 if (strcmp(link->dst->filter->name, "scale")) {
1103 av_assert1(frame->format == link->format);
1104 av_assert1(frame->width == link->w);
1105 av_assert1(frame->height == link->h);
1108 av_assert1(frame->format == link->format);
1109 av_assert1(av_frame_get_channels(frame) == link->channels);
1110 av_assert1(frame->channel_layout == link->channel_layout);
1111 av_assert1(frame->sample_rate == link->sample_rate);
1114 /* Go directly to actual filtering if possible */
1115 if (link->type == AVMEDIA_TYPE_AUDIO &&
1116 link->min_samples &&
1117 (link->partial_buf ||
1118 frame->nb_samples < link->min_samples ||
1119 frame->nb_samples > link->max_samples)) {
1120 return ff_filter_frame_needs_framing(link, frame);
1122 return ff_filter_frame_framed(link, frame);
1126 const AVClass *avfilter_get_class(void)
1128 return &avfilter_class;