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};
278 if (inlink && !link->frame_rate.num && !link->frame_rate.den)
279 link->frame_rate = inlink->frame_rate;
286 } else if (!link->w || !link->h) {
287 av_log(link->src, AV_LOG_ERROR,
288 "Video source filters must set their output link's "
289 "width and height\n");
290 return AVERROR(EINVAL);
294 case AVMEDIA_TYPE_AUDIO:
296 if (!link->time_base.num && !link->time_base.den)
297 link->time_base = inlink->time_base;
300 if (!link->time_base.num && !link->time_base.den)
301 link->time_base = (AVRational) {1, link->sample_rate};
304 if ((config_link = link->dstpad->config_props))
305 if ((ret = config_link(link)) < 0) {
306 av_log(link->dst, AV_LOG_ERROR,
307 "Failed to configure input pad on %s\n",
312 link->init_state = AVLINK_INIT;
319 void ff_tlog_link(void *ctx, AVFilterLink *link, int end)
321 if (link->type == AVMEDIA_TYPE_VIDEO) {
323 "link[%p s:%dx%d fmt:%s %s->%s]%s",
324 link, link->w, link->h,
325 av_get_pix_fmt_name(link->format),
326 link->src ? link->src->filter->name : "",
327 link->dst ? link->dst->filter->name : "",
331 av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);
334 "link[%p r:%d cl:%s fmt:%s %s->%s]%s",
335 link, (int)link->sample_rate, buf,
336 av_get_sample_fmt_name(link->format),
337 link->src ? link->src->filter->name : "",
338 link->dst ? link->dst->filter->name : "",
343 int ff_request_frame(AVFilterLink *link)
346 FF_TPRINTF_START(NULL, request_frame); ff_tlog_link(NULL, link, 1);
350 if (link->srcpad->request_frame)
351 ret = link->srcpad->request_frame(link);
352 else if (link->src->inputs[0])
353 ret = ff_request_frame(link->src->inputs[0]);
354 if (ret == AVERROR_EOF && link->partial_buf) {
355 AVFrame *pbuf = link->partial_buf;
356 link->partial_buf = NULL;
357 ret = ff_filter_frame_framed(link, pbuf);
360 if (ret == AVERROR_EOF)
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])
376 return AVERROR(EINVAL);
377 val = ff_poll_frame(link->src->inputs[i]);
378 min = FFMIN(min, val);
384 static const char *const var_names[] = {
402 static int set_enable_expr(AVFilterContext *ctx, const char *expr)
406 AVExpr *old = ctx->enable;
408 if (!(ctx->filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE)) {
409 av_log(ctx, AV_LOG_ERROR, "Timeline ('enable' option) not supported "
410 "with filter '%s'\n", ctx->filter->name);
411 return AVERROR_PATCHWELCOME;
414 expr_dup = av_strdup(expr);
416 return AVERROR(ENOMEM);
418 if (!ctx->var_values) {
419 ctx->var_values = av_calloc(VAR_VARS_NB, sizeof(*ctx->var_values));
420 if (!ctx->var_values) {
422 return AVERROR(ENOMEM);
426 ret = av_expr_parse((AVExpr**)&ctx->enable, expr_dup, var_names,
427 NULL, NULL, NULL, NULL, 0, ctx->priv);
429 av_log(ctx->priv, AV_LOG_ERROR,
430 "Error when evaluating the expression '%s' for enable\n",
437 av_free(ctx->enable_str);
438 ctx->enable_str = expr_dup;
442 void ff_update_link_current_pts(AVFilterLink *link, int64_t pts)
444 if (pts == AV_NOPTS_VALUE)
446 link->current_pts = av_rescale_q(pts, link->time_base, AV_TIME_BASE_Q);
447 /* TODO use duration */
448 if (link->graph && link->age_index >= 0)
449 ff_avfilter_graph_update_heap(link->graph, link);
452 int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags)
454 if(!strcmp(cmd, "ping")){
455 char local_res[256] = {0};
459 res_len = sizeof(local_res);
461 av_strlcatf(res, res_len, "pong from:%s %s\n", filter->filter->name, filter->name);
462 if (res == local_res)
463 av_log(filter, AV_LOG_INFO, "%s", res);
465 }else if(!strcmp(cmd, "enable")) {
466 return set_enable_expr(filter, arg);
467 }else if(filter->filter->process_command) {
468 return filter->filter->process_command(filter, cmd, arg, res, res_len, flags);
470 return AVERROR(ENOSYS);
473 static AVFilter *first_filter;
474 static AVFilter **last_filter = &first_filter;
476 #if !FF_API_NOCONST_GET_NAME
479 AVFilter *avfilter_get_by_name(const char *name)
481 const AVFilter *f = NULL;
486 while ((f = avfilter_next(f)))
487 if (!strcmp(f->name, name))
488 return (AVFilter *)f;
493 int avfilter_register(AVFilter *filter)
495 AVFilter **f = last_filter;
497 /* the filter must select generic or internal exclusively */
498 av_assert0((filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE) != AVFILTER_FLAG_SUPPORT_TIMELINE);
502 while(*f || avpriv_atomic_ptr_cas((void * volatile *)f, NULL, filter))
504 last_filter = &filter->next;
509 const AVFilter *avfilter_next(const AVFilter *prev)
511 return prev ? prev->next : first_filter;
514 #if FF_API_OLD_FILTER_REGISTER
515 AVFilter **av_filter_next(AVFilter **filter)
517 return filter ? &(*filter)->next : &first_filter;
520 void avfilter_uninit(void)
525 int avfilter_pad_count(const AVFilterPad *pads)
532 for (count = 0; pads->name; count++)
537 static const char *default_filter_name(void *filter_ctx)
539 AVFilterContext *ctx = filter_ctx;
540 return ctx->name ? ctx->name : ctx->filter->name;
543 static void *filter_child_next(void *obj, void *prev)
545 AVFilterContext *ctx = obj;
546 if (!prev && ctx->filter && ctx->filter->priv_class && ctx->priv)
551 static const AVClass *filter_child_class_next(const AVClass *prev)
553 const AVFilter *f = NULL;
555 /* find the filter that corresponds to prev */
556 while (prev && (f = avfilter_next(f)))
557 if (f->priv_class == prev)
560 /* could not find filter corresponding to prev */
564 /* find next filter with specific options */
565 while ((f = avfilter_next(f)))
567 return f->priv_class;
572 #define OFFSET(x) offsetof(AVFilterContext, x)
573 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM
574 static const AVOption avfilter_options[] = {
575 { "thread_type", "Allowed thread types", OFFSET(thread_type), AV_OPT_TYPE_FLAGS,
576 { .i64 = AVFILTER_THREAD_SLICE }, 0, INT_MAX, FLAGS, "thread_type" },
577 { "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .unit = "thread_type" },
578 { "enable", "set enable expression", OFFSET(enable_str), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
582 static const AVClass avfilter_class = {
583 .class_name = "AVFilter",
584 .item_name = default_filter_name,
585 .version = LIBAVUTIL_VERSION_INT,
586 .category = AV_CLASS_CATEGORY_FILTER,
587 .child_next = filter_child_next,
588 .child_class_next = filter_child_class_next,
589 .option = avfilter_options,
592 static int default_execute(AVFilterContext *ctx, avfilter_action_func *func, void *arg,
593 int *ret, int nb_jobs)
597 for (i = 0; i < nb_jobs; i++) {
598 int r = func(ctx, arg, i, nb_jobs);
605 AVFilterContext *ff_filter_alloc(const AVFilter *filter, const char *inst_name)
607 AVFilterContext *ret;
612 ret = av_mallocz(sizeof(AVFilterContext));
616 ret->av_class = &avfilter_class;
617 ret->filter = filter;
618 ret->name = inst_name ? av_strdup(inst_name) : NULL;
619 if (filter->priv_size) {
620 ret->priv = av_mallocz(filter->priv_size);
625 av_opt_set_defaults(ret);
626 if (filter->priv_class) {
627 *(const AVClass**)ret->priv = filter->priv_class;
628 av_opt_set_defaults(ret->priv);
631 ret->internal = av_mallocz(sizeof(*ret->internal));
634 ret->internal->execute = default_execute;
636 ret->nb_inputs = avfilter_pad_count(filter->inputs);
637 if (ret->nb_inputs ) {
638 ret->input_pads = av_malloc_array(ret->nb_inputs, sizeof(AVFilterPad));
639 if (!ret->input_pads)
641 memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->nb_inputs);
642 ret->inputs = av_mallocz_array(ret->nb_inputs, sizeof(AVFilterLink*));
647 ret->nb_outputs = avfilter_pad_count(filter->outputs);
648 if (ret->nb_outputs) {
649 ret->output_pads = av_malloc_array(ret->nb_outputs, sizeof(AVFilterPad));
650 if (!ret->output_pads)
652 memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->nb_outputs);
653 ret->outputs = av_mallocz_array(ret->nb_outputs, sizeof(AVFilterLink*));
661 av_freep(&ret->inputs);
662 av_freep(&ret->input_pads);
664 av_freep(&ret->outputs);
665 av_freep(&ret->output_pads);
667 av_freep(&ret->priv);
668 av_freep(&ret->internal);
673 #if FF_API_AVFILTER_OPEN
674 int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
676 *filter_ctx = ff_filter_alloc(filter, inst_name);
677 return *filter_ctx ? 0 : AVERROR(ENOMEM);
681 static void free_link(AVFilterLink *link)
687 link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
689 link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
691 ff_formats_unref(&link->in_formats);
692 ff_formats_unref(&link->out_formats);
693 ff_formats_unref(&link->in_samplerates);
694 ff_formats_unref(&link->out_samplerates);
695 ff_channel_layouts_unref(&link->in_channel_layouts);
696 ff_channel_layouts_unref(&link->out_channel_layouts);
697 avfilter_link_free(&link);
700 void avfilter_free(AVFilterContext *filter)
708 ff_filter_graph_remove_filter(filter->graph, filter);
710 if (filter->filter->uninit)
711 filter->filter->uninit(filter);
713 for (i = 0; i < filter->nb_inputs; i++) {
714 free_link(filter->inputs[i]);
716 for (i = 0; i < filter->nb_outputs; i++) {
717 free_link(filter->outputs[i]);
720 if (filter->filter->priv_class)
721 av_opt_free(filter->priv);
723 av_freep(&filter->name);
724 av_freep(&filter->input_pads);
725 av_freep(&filter->output_pads);
726 av_freep(&filter->inputs);
727 av_freep(&filter->outputs);
728 av_freep(&filter->priv);
729 while(filter->command_queue){
730 ff_command_queue_pop(filter);
733 av_expr_free(filter->enable);
734 filter->enable = NULL;
735 av_freep(&filter->var_values);
736 av_freep(&filter->internal);
740 static int process_options(AVFilterContext *ctx, AVDictionary **options,
743 const AVOption *o = NULL;
745 char *av_uninit(parsed_key), *av_uninit(value);
753 const char *shorthand = NULL;
755 o = av_opt_next(ctx->priv, o);
757 if (o->type == AV_OPT_TYPE_CONST || o->offset == offset)
763 ret = av_opt_get_key_value(&args, "=", ":",
764 shorthand ? AV_OPT_FLAG_IMPLICIT_KEY : 0,
765 &parsed_key, &value);
767 if (ret == AVERROR(EINVAL))
768 av_log(ctx, AV_LOG_ERROR, "No option name near '%s'\n", args);
770 av_log(ctx, AV_LOG_ERROR, "Unable to parse '%s': %s\n", args,
778 while ((o = av_opt_next(ctx->priv, o))); /* discard all remaining shorthand */
783 av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value);
785 if (av_opt_find(ctx, key, NULL, 0, 0)) {
786 ret = av_opt_set(ctx, key, value, 0);
793 av_dict_set(options, key, value, 0);
794 if ((ret = av_opt_set(ctx->priv, key, value, 0)) < 0) {
795 if (!av_opt_find(ctx->priv, key, NULL, 0, AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ)) {
796 if (ret == AVERROR_OPTION_NOT_FOUND)
797 av_log(ctx, AV_LOG_ERROR, "Option '%s' not found\n", key);
810 if (ctx->enable_str) {
811 ret = set_enable_expr(ctx, ctx->enable_str);
818 #if FF_API_AVFILTER_INIT_FILTER
819 int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
821 return avfilter_init_str(filter, args);
825 int avfilter_init_dict(AVFilterContext *ctx, AVDictionary **options)
829 ret = av_opt_set_dict(ctx, options);
831 av_log(ctx, AV_LOG_ERROR, "Error applying generic filter options.\n");
835 if (ctx->filter->flags & AVFILTER_FLAG_SLICE_THREADS &&
836 ctx->thread_type & ctx->graph->thread_type & AVFILTER_THREAD_SLICE &&
837 ctx->graph->internal->thread_execute) {
838 ctx->thread_type = AVFILTER_THREAD_SLICE;
839 ctx->internal->execute = ctx->graph->internal->thread_execute;
841 ctx->thread_type = 0;
844 if (ctx->filter->priv_class) {
845 ret = av_opt_set_dict(ctx->priv, options);
847 av_log(ctx, AV_LOG_ERROR, "Error applying options to the filter.\n");
852 if (ctx->filter->init_opaque)
853 ret = ctx->filter->init_opaque(ctx, NULL);
854 else if (ctx->filter->init)
855 ret = ctx->filter->init(ctx);
856 else if (ctx->filter->init_dict)
857 ret = ctx->filter->init_dict(ctx, options);
862 int avfilter_init_str(AVFilterContext *filter, const char *args)
864 AVDictionary *options = NULL;
865 AVDictionaryEntry *e;
869 if (!filter->filter->priv_class) {
870 av_log(filter, AV_LOG_ERROR, "This filter does not take any "
871 "options, but options were provided: %s.\n", args);
872 return AVERROR(EINVAL);
875 #if FF_API_OLD_FILTER_OPTS || FF_API_OLD_FILTER_OPTS_ERROR
876 if ( !strcmp(filter->filter->name, "format") ||
877 !strcmp(filter->filter->name, "noformat") ||
878 !strcmp(filter->filter->name, "frei0r") ||
879 !strcmp(filter->filter->name, "frei0r_src") ||
880 !strcmp(filter->filter->name, "ocv") ||
881 !strcmp(filter->filter->name, "pan") ||
882 !strcmp(filter->filter->name, "pp") ||
883 !strcmp(filter->filter->name, "aevalsrc")) {
884 /* a hack for compatibility with the old syntax
885 * replace colons with |s */
886 char *copy = av_strdup(args);
888 int nb_leading = 0; // number of leading colons to skip
892 ret = AVERROR(ENOMEM);
896 if (!strcmp(filter->filter->name, "frei0r") ||
897 !strcmp(filter->filter->name, "ocv"))
899 else if (!strcmp(filter->filter->name, "frei0r_src"))
902 while (nb_leading--) {
905 p = copy + strlen(copy);
911 deprecated = strchr(p, ':') != NULL;
913 if (!strcmp(filter->filter->name, "aevalsrc")) {
915 while ((p = strchr(p, ':')) && p[1] != ':') {
916 const char *epos = strchr(p + 1, '=');
917 const char *spos = strchr(p + 1, ':');
918 const int next_token_is_opt = epos && (!spos || epos < spos);
919 if (next_token_is_opt) {
923 /* next token does not contain a '=', assume a channel expression */
927 if (p && *p == ':') { // double sep '::' found
929 memmove(p, p + 1, strlen(p));
932 while ((p = strchr(p, ':')))
935 #if FF_API_OLD_FILTER_OPTS
937 av_log(filter, AV_LOG_WARNING, "This syntax is deprecated. Use "
938 "'|' to separate the list items.\n");
940 av_log(filter, AV_LOG_DEBUG, "compat: called with args=[%s]\n", copy);
941 ret = process_options(filter, &options, copy);
944 av_log(filter, AV_LOG_ERROR, "This syntax is deprecated. Use "
945 "'|' to separate the list items ('%s' instead of '%s')\n",
947 ret = AVERROR(EINVAL);
949 ret = process_options(filter, &options, copy);
959 ret = process_options(filter, &options, args);
965 ret = avfilter_init_dict(filter, &options);
969 if ((e = av_dict_get(options, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
970 av_log(filter, AV_LOG_ERROR, "No such option: %s.\n", e->key);
971 ret = AVERROR_OPTION_NOT_FOUND;
976 av_dict_free(&options);
981 const char *avfilter_pad_get_name(const AVFilterPad *pads, int pad_idx)
983 return pads[pad_idx].name;
986 enum AVMediaType avfilter_pad_get_type(const AVFilterPad *pads, int pad_idx)
988 return pads[pad_idx].type;
991 static int default_filter_frame(AVFilterLink *link, AVFrame *frame)
993 return ff_filter_frame(link->dst->outputs[0], frame);
996 static int ff_filter_frame_framed(AVFilterLink *link, AVFrame *frame)
998 int (*filter_frame)(AVFilterLink *, AVFrame *);
999 AVFilterContext *dstctx = link->dst;
1000 AVFilterPad *dst = link->dstpad;
1001 AVFrame *out = NULL;
1003 AVFilterCommand *cmd= link->dst->command_queue;
1007 av_frame_free(&frame);
1011 if (!(filter_frame = dst->filter_frame))
1012 filter_frame = default_filter_frame;
1014 /* copy the frame if needed */
1015 if (dst->needs_writable && !av_frame_is_writable(frame)) {
1016 av_log(link->dst, AV_LOG_DEBUG, "Copying data in avfilter.\n");
1018 switch (link->type) {
1019 case AVMEDIA_TYPE_VIDEO:
1020 out = ff_get_video_buffer(link, link->w, link->h);
1022 case AVMEDIA_TYPE_AUDIO:
1023 out = ff_get_audio_buffer(link, frame->nb_samples);
1026 ret = AVERROR(EINVAL);
1030 ret = AVERROR(ENOMEM);
1034 ret = av_frame_copy_props(out, frame);
1038 switch (link->type) {
1039 case AVMEDIA_TYPE_VIDEO:
1040 av_image_copy(out->data, out->linesize, (const uint8_t **)frame->data, frame->linesize,
1041 frame->format, frame->width, frame->height);
1043 case AVMEDIA_TYPE_AUDIO:
1044 av_samples_copy(out->extended_data, frame->extended_data,
1045 0, 0, frame->nb_samples,
1046 av_get_channel_layout_nb_channels(frame->channel_layout),
1050 ret = AVERROR(EINVAL);
1054 av_frame_free(&frame);
1058 while(cmd && cmd->time <= out->pts * av_q2d(link->time_base)){
1059 av_log(link->dst, AV_LOG_DEBUG,
1060 "Processing command time:%f command:%s arg:%s\n",
1061 cmd->time, cmd->command, cmd->arg);
1062 avfilter_process_command(link->dst, cmd->command, cmd->arg, 0, 0, cmd->flags);
1063 ff_command_queue_pop(link->dst);
1064 cmd= link->dst->command_queue;
1068 if (dstctx->enable_str) {
1069 int64_t pos = av_frame_get_pkt_pos(out);
1070 dstctx->var_values[VAR_N] = link->frame_count;
1071 dstctx->var_values[VAR_T] = pts == AV_NOPTS_VALUE ? NAN : pts * av_q2d(link->time_base);
1072 dstctx->var_values[VAR_W] = link->w;
1073 dstctx->var_values[VAR_H] = link->h;
1074 dstctx->var_values[VAR_POS] = pos == -1 ? NAN : pos;
1076 dstctx->is_disabled = fabs(av_expr_eval(dstctx->enable, dstctx->var_values, NULL)) < 0.5;
1077 if (dstctx->is_disabled &&
1078 (dstctx->filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC))
1079 filter_frame = default_filter_frame;
1081 ret = filter_frame(link, out);
1082 link->frame_count++;
1083 ff_update_link_current_pts(link, pts);
1087 av_frame_free(&out);
1088 av_frame_free(&frame);
1092 static int ff_filter_frame_needs_framing(AVFilterLink *link, AVFrame *frame)
1094 int insamples = frame->nb_samples, inpos = 0, nb_samples;
1095 AVFrame *pbuf = link->partial_buf;
1096 int nb_channels = av_frame_get_channels(frame);
1099 /* Handle framing (min_samples, max_samples) */
1102 AVRational samples_tb = { 1, link->sample_rate };
1103 pbuf = ff_get_audio_buffer(link, link->partial_buf_size);
1105 av_log(link->dst, AV_LOG_WARNING,
1106 "Samples dropped due to memory allocation failure.\n");
1109 av_frame_copy_props(pbuf, frame);
1110 pbuf->pts = frame->pts;
1111 if (pbuf->pts != AV_NOPTS_VALUE)
1112 pbuf->pts += av_rescale_q(inpos, samples_tb, link->time_base);
1113 pbuf->nb_samples = 0;
1115 nb_samples = FFMIN(insamples,
1116 link->partial_buf_size - pbuf->nb_samples);
1117 av_samples_copy(pbuf->extended_data, frame->extended_data,
1118 pbuf->nb_samples, inpos,
1119 nb_samples, nb_channels, link->format);
1120 inpos += nb_samples;
1121 insamples -= nb_samples;
1122 pbuf->nb_samples += nb_samples;
1123 if (pbuf->nb_samples >= link->min_samples) {
1124 ret = ff_filter_frame_framed(link, pbuf);
1128 av_frame_free(&frame);
1129 link->partial_buf = pbuf;
1133 int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
1135 FF_TPRINTF_START(NULL, filter_frame); ff_tlog_link(NULL, link, 1); ff_tlog(NULL, " "); ff_tlog_ref(NULL, frame, 1);
1137 /* Consistency checks */
1138 if (link->type == AVMEDIA_TYPE_VIDEO) {
1139 if (strcmp(link->dst->filter->name, "buffersink") &&
1140 strcmp(link->dst->filter->name, "format") &&
1141 strcmp(link->dst->filter->name, "idet") &&
1142 strcmp(link->dst->filter->name, "null") &&
1143 strcmp(link->dst->filter->name, "scale")) {
1144 av_assert1(frame->format == link->format);
1145 av_assert1(frame->width == link->w);
1146 av_assert1(frame->height == link->h);
1149 if (frame->format != link->format) {
1150 av_log(link->dst, AV_LOG_ERROR, "Format change is not supported\n");
1153 if (av_frame_get_channels(frame) != link->channels) {
1154 av_log(link->dst, AV_LOG_ERROR, "Channel count change is not supported\n");
1157 if (frame->channel_layout != link->channel_layout) {
1158 av_log(link->dst, AV_LOG_ERROR, "Channel layout change is not supported\n");
1161 if (frame->sample_rate != link->sample_rate) {
1162 av_log(link->dst, AV_LOG_ERROR, "Sample rate change is not supported\n");
1167 /* Go directly to actual filtering if possible */
1168 if (link->type == AVMEDIA_TYPE_AUDIO &&
1169 link->min_samples &&
1170 (link->partial_buf ||
1171 frame->nb_samples < link->min_samples ||
1172 frame->nb_samples > link->max_samples)) {
1173 return ff_filter_frame_needs_framing(link, frame);
1175 return ff_filter_frame_framed(link, frame);
1178 av_frame_free(&frame);
1179 return AVERROR_PATCHWELCOME;
1182 const AVClass *avfilter_get_class(void)
1184 return &avfilter_class;