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/avassert.h"
23 #include "libavutil/avstring.h"
24 #include "libavutil/channel_layout.h"
25 #include "libavutil/common.h"
26 #include "libavutil/eval.h"
27 #include "libavutil/imgutils.h"
28 #include "libavutil/opt.h"
29 #include "libavutil/pixdesc.h"
30 #include "libavutil/rational.h"
31 #include "libavutil/samplefmt.h"
39 static int ff_filter_frame_framed(AVFilterLink *link, AVFrame *frame);
41 void ff_tlog_ref(void *ctx, AVFrame *ref, int end)
43 av_unused char buf[16];
45 "ref[%p buf:%p data:%p linesize[%d, %d, %d, %d] pts:%"PRId64" pos:%"PRId64,
46 ref, ref->buf, ref->data[0],
47 ref->linesize[0], ref->linesize[1], ref->linesize[2], ref->linesize[3],
48 ref->pts, av_frame_get_pkt_pos(ref));
51 ff_tlog(ctx, " a:%d/%d s:%dx%d i:%c iskey:%d type:%c",
52 ref->sample_aspect_ratio.num, ref->sample_aspect_ratio.den,
53 ref->width, ref->height,
54 !ref->interlaced_frame ? 'P' : /* Progressive */
55 ref->top_field_first ? 'T' : 'B', /* Top / Bottom */
57 av_get_picture_type_char(ref->pict_type));
59 if (ref->nb_samples) {
60 ff_tlog(ctx, " cl:%"PRId64"d n:%d r:%d",
66 ff_tlog(ctx, "]%s", end ? "\n" : "");
69 unsigned avfilter_version(void) {
70 av_assert0(LIBAVFILTER_VERSION_MICRO >= 100);
71 return LIBAVFILTER_VERSION_INT;
74 const char *avfilter_configuration(void)
76 return FFMPEG_CONFIGURATION;
79 const char *avfilter_license(void)
81 #define LICENSE_PREFIX "libavfilter license: "
82 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
85 void ff_command_queue_pop(AVFilterContext *filter)
87 AVFilterCommand *c= filter->command_queue;
89 av_freep(&c->command);
90 filter->command_queue= c->next;
94 void ff_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
95 AVFilterPad **pads, AVFilterLink ***links,
100 idx = FFMIN(idx, *count);
102 *pads = av_realloc(*pads, sizeof(AVFilterPad) * (*count + 1));
103 *links = av_realloc(*links, sizeof(AVFilterLink*) * (*count + 1));
104 memmove(*pads +idx+1, *pads +idx, sizeof(AVFilterPad) * (*count-idx));
105 memmove(*links+idx+1, *links+idx, sizeof(AVFilterLink*) * (*count-idx));
106 memcpy(*pads+idx, newpad, sizeof(AVFilterPad));
107 (*links)[idx] = NULL;
110 for (i = idx+1; i < *count; i++)
112 (*(unsigned *)((uint8_t *) *links[i] + padidx_off))++;
115 int avfilter_link(AVFilterContext *src, unsigned srcpad,
116 AVFilterContext *dst, unsigned dstpad)
120 if (src->nb_outputs <= srcpad || dst->nb_inputs <= dstpad ||
121 src->outputs[srcpad] || dst->inputs[dstpad])
124 if (src->output_pads[srcpad].type != dst->input_pads[dstpad].type) {
125 av_log(src, AV_LOG_ERROR,
126 "Media type mismatch between the '%s' filter output pad %d (%s) and the '%s' filter input pad %d (%s)\n",
127 src->name, srcpad, (char *)av_x_if_null(av_get_media_type_string(src->output_pads[srcpad].type), "?"),
128 dst->name, dstpad, (char *)av_x_if_null(av_get_media_type_string(dst-> input_pads[dstpad].type), "?"));
129 return AVERROR(EINVAL);
132 src->outputs[srcpad] =
133 dst-> inputs[dstpad] = link = av_mallocz(sizeof(AVFilterLink));
137 link->srcpad = &src->output_pads[srcpad];
138 link->dstpad = &dst->input_pads[dstpad];
139 link->type = src->output_pads[srcpad].type;
140 av_assert0(AV_PIX_FMT_NONE == -1 && AV_SAMPLE_FMT_NONE == -1);
146 void avfilter_link_free(AVFilterLink **link)
151 av_frame_free(&(*link)->partial_buf);
156 int avfilter_link_get_channels(AVFilterLink *link)
158 return link->channels;
161 void avfilter_link_set_closed(AVFilterLink *link, int closed)
163 link->closed = closed;
166 int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
167 unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
170 unsigned dstpad_idx = link->dstpad - link->dst->input_pads;
172 av_log(link->dst, AV_LOG_VERBOSE, "auto-inserting filter '%s' "
173 "between the filter '%s' and the filter '%s'\n",
174 filt->name, link->src->name, link->dst->name);
176 link->dst->inputs[dstpad_idx] = NULL;
177 if ((ret = avfilter_link(filt, filt_dstpad_idx, link->dst, dstpad_idx)) < 0) {
178 /* failed to link output filter to new filter */
179 link->dst->inputs[dstpad_idx] = link;
183 /* re-hookup the link to the new destination filter we inserted */
185 link->dstpad = &filt->input_pads[filt_srcpad_idx];
186 filt->inputs[filt_srcpad_idx] = link;
188 /* if any information on supported media formats already exists on the
189 * link, we need to preserve that */
190 if (link->out_formats)
191 ff_formats_changeref(&link->out_formats,
192 &filt->outputs[filt_dstpad_idx]->out_formats);
194 if (link->out_samplerates)
195 ff_formats_changeref(&link->out_samplerates,
196 &filt->outputs[filt_dstpad_idx]->out_samplerates);
197 if (link->out_channel_layouts)
198 ff_channel_layouts_changeref(&link->out_channel_layouts,
199 &filt->outputs[filt_dstpad_idx]->out_channel_layouts);
204 int avfilter_config_links(AVFilterContext *filter)
206 int (*config_link)(AVFilterLink *);
210 for (i = 0; i < filter->nb_inputs; i ++) {
211 AVFilterLink *link = filter->inputs[i];
212 AVFilterLink *inlink;
216 inlink = link->src->nb_inputs ? link->src->inputs[0] : NULL;
217 link->current_pts = AV_NOPTS_VALUE;
219 switch (link->init_state) {
222 case AVLINK_STARTINIT:
223 av_log(filter, AV_LOG_INFO, "circular filter chain detected\n");
226 link->init_state = AVLINK_STARTINIT;
228 if ((ret = avfilter_config_links(link->src)) < 0)
231 if (!(config_link = link->srcpad->config_props)) {
232 if (link->src->nb_inputs != 1) {
233 av_log(link->src, AV_LOG_ERROR, "Source filters and filters "
234 "with more than one input "
235 "must set config_props() "
236 "callbacks on all outputs\n");
237 return AVERROR(EINVAL);
239 } else if ((ret = config_link(link)) < 0) {
240 av_log(link->src, AV_LOG_ERROR,
241 "Failed to configure output pad on %s\n",
246 switch (link->type) {
247 case AVMEDIA_TYPE_VIDEO:
248 if (!link->time_base.num && !link->time_base.den)
249 link->time_base = inlink ? inlink->time_base : AV_TIME_BASE_Q;
251 if (!link->sample_aspect_ratio.num && !link->sample_aspect_ratio.den)
252 link->sample_aspect_ratio = inlink ?
253 inlink->sample_aspect_ratio : (AVRational){1,1};
255 if (inlink && !link->frame_rate.num && !link->frame_rate.den)
256 link->frame_rate = inlink->frame_rate;
263 } else if (!link->w || !link->h) {
264 av_log(link->src, AV_LOG_ERROR,
265 "Video source filters must set their output link's "
266 "width and height\n");
267 return AVERROR(EINVAL);
271 case AVMEDIA_TYPE_AUDIO:
273 if (!link->time_base.num && !link->time_base.den)
274 link->time_base = inlink->time_base;
277 if (!link->time_base.num && !link->time_base.den)
278 link->time_base = (AVRational) {1, link->sample_rate};
281 if ((config_link = link->dstpad->config_props))
282 if ((ret = config_link(link)) < 0) {
283 av_log(link->src, AV_LOG_ERROR,
284 "Failed to configure input pad on %s\n",
289 link->init_state = AVLINK_INIT;
296 void ff_tlog_link(void *ctx, AVFilterLink *link, int end)
298 if (link->type == AVMEDIA_TYPE_VIDEO) {
300 "link[%p s:%dx%d fmt:%s %s->%s]%s",
301 link, link->w, link->h,
302 av_get_pix_fmt_name(link->format),
303 link->src ? link->src->filter->name : "",
304 link->dst ? link->dst->filter->name : "",
308 av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);
311 "link[%p r:%d cl:%s fmt:%s %s->%s]%s",
312 link, (int)link->sample_rate, buf,
313 av_get_sample_fmt_name(link->format),
314 link->src ? link->src->filter->name : "",
315 link->dst ? link->dst->filter->name : "",
320 int ff_request_frame(AVFilterLink *link)
323 FF_TPRINTF_START(NULL, request_frame); ff_tlog_link(NULL, link, 1);
327 av_assert0(!link->frame_requested);
328 link->frame_requested = 1;
329 while (link->frame_requested) {
330 if (link->srcpad->request_frame)
331 ret = link->srcpad->request_frame(link);
332 else if (link->src->inputs[0])
333 ret = ff_request_frame(link->src->inputs[0]);
334 if (ret == AVERROR_EOF && link->partial_buf) {
335 AVFrame *pbuf = link->partial_buf;
336 link->partial_buf = NULL;
337 ret = ff_filter_frame_framed(link, pbuf);
340 link->frame_requested = 0;
341 if (ret == AVERROR_EOF)
344 av_assert0(!link->frame_requested ||
345 link->flags & FF_LINK_FLAG_REQUEST_LOOP);
351 int ff_poll_frame(AVFilterLink *link)
353 int i, min = INT_MAX;
355 if (link->srcpad->poll_frame)
356 return link->srcpad->poll_frame(link);
358 for (i = 0; i < link->src->nb_inputs; i++) {
360 if (!link->src->inputs[i])
362 val = ff_poll_frame(link->src->inputs[i]);
363 min = FFMIN(min, val);
369 static const char *const var_names[] = { "t", "n", "pos", NULL };
370 enum { VAR_T, VAR_N, VAR_POS, VAR_VARS_NB };
372 static int set_enable_expr(AVFilterContext *ctx, const char *expr)
376 AVExpr *old = ctx->enable;
378 if (!(ctx->filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE)) {
379 av_log(ctx, AV_LOG_ERROR, "Timeline ('enable' option) not supported "
380 "with filter '%s'\n", ctx->filter->name);
381 return AVERROR_PATCHWELCOME;
384 expr_dup = av_strdup(expr);
386 return AVERROR(ENOMEM);
388 if (!ctx->var_values) {
389 ctx->var_values = av_calloc(VAR_VARS_NB, sizeof(*ctx->var_values));
390 if (!ctx->var_values) {
392 return AVERROR(ENOMEM);
396 ret = av_expr_parse((AVExpr**)&ctx->enable, expr_dup, var_names,
397 NULL, NULL, NULL, NULL, 0, ctx->priv);
399 av_log(ctx->priv, AV_LOG_ERROR,
400 "Error when evaluating the expression '%s' for enable\n",
407 av_free(ctx->enable_str);
408 ctx->enable_str = expr_dup;
412 void ff_update_link_current_pts(AVFilterLink *link, int64_t pts)
414 if (pts == AV_NOPTS_VALUE)
416 link->current_pts = av_rescale_q(pts, link->time_base, AV_TIME_BASE_Q);
417 /* TODO use duration */
418 if (link->graph && link->age_index >= 0)
419 ff_avfilter_graph_update_heap(link->graph, link);
422 int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags)
424 if(!strcmp(cmd, "ping")){
425 av_strlcatf(res, res_len, "pong from:%s %s\n", filter->filter->name, filter->name);
427 }else if(!strcmp(cmd, "enable")) {
428 return set_enable_expr(filter, arg);
429 }else if(filter->filter->process_command) {
430 return filter->filter->process_command(filter, cmd, arg, res, res_len, flags);
432 return AVERROR(ENOSYS);
435 static AVFilter *first_filter;
437 AVFilter *avfilter_get_by_name(const char *name)
444 while ((f = avfilter_next(f)))
445 if (!strcmp(f->name, name))
451 int avfilter_register(AVFilter *filter)
453 AVFilter **f = &first_filter;
456 for(i=0; filter->inputs && filter->inputs[i].name; i++) {
457 const AVFilterPad *input = &filter->inputs[i];
458 av_assert0( !input->filter_frame
459 || (!input->start_frame && !input->end_frame));
470 const AVFilter *avfilter_next(const AVFilter *prev)
472 return prev ? prev->next : first_filter;
475 #if FF_API_OLD_FILTER_REGISTER
476 AVFilter **av_filter_next(AVFilter **filter)
478 return filter ? &(*filter)->next : &first_filter;
481 void avfilter_uninit(void)
486 int avfilter_pad_count(const AVFilterPad *pads)
493 for(count = 0; pads->name; count ++) pads ++;
497 static const char *default_filter_name(void *filter_ctx)
499 AVFilterContext *ctx = filter_ctx;
500 return ctx->name ? ctx->name : ctx->filter->name;
503 static void *filter_child_next(void *obj, void *prev)
505 AVFilterContext *ctx = obj;
506 if (!prev && ctx->filter && ctx->filter->priv_class && ctx->priv)
511 static const AVClass *filter_child_class_next(const AVClass *prev)
515 /* find the filter that corresponds to prev */
516 while (prev && (f = avfilter_next(f)))
517 if (f->priv_class == prev)
520 /* could not find filter corresponding to prev */
524 /* find next filter with specific options */
525 while ((f = avfilter_next(f)))
527 return f->priv_class;
532 #define OFFSET(x) offsetof(AVFilterContext, x)
533 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM
534 static const AVOption filters_common_options[] = {
535 { "enable", "set enable expression", OFFSET(enable_str), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
539 static const AVClass avfilter_class = {
540 .class_name = "AVFilter",
541 .item_name = default_filter_name,
542 .version = LIBAVUTIL_VERSION_INT,
543 .category = AV_CLASS_CATEGORY_FILTER,
544 .child_next = filter_child_next,
545 .option = filters_common_options,
546 .child_class_next = filter_child_class_next,
549 AVFilterContext *ff_filter_alloc(const AVFilter *filter, const char *inst_name)
551 AVFilterContext *ret;
556 ret = av_mallocz(sizeof(AVFilterContext));
560 ret->av_class = &avfilter_class;
561 ret->filter = filter;
562 ret->name = inst_name ? av_strdup(inst_name) : NULL;
563 if (filter->priv_size) {
564 ret->priv = av_mallocz(filter->priv_size);
569 if (filter->priv_class) {
570 *(const AVClass**)ret->priv = filter->priv_class;
571 av_opt_set_defaults(ret->priv);
574 ret->nb_inputs = avfilter_pad_count(filter->inputs);
575 if (ret->nb_inputs ) {
576 ret->input_pads = av_malloc(sizeof(AVFilterPad) * ret->nb_inputs);
577 if (!ret->input_pads)
579 memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->nb_inputs);
580 ret->inputs = av_mallocz(sizeof(AVFilterLink*) * ret->nb_inputs);
585 ret->nb_outputs = avfilter_pad_count(filter->outputs);
586 if (ret->nb_outputs) {
587 ret->output_pads = av_malloc(sizeof(AVFilterPad) * ret->nb_outputs);
588 if (!ret->output_pads)
590 memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->nb_outputs);
591 ret->outputs = av_mallocz(sizeof(AVFilterLink*) * ret->nb_outputs);
596 ret->output_count = ret->nb_outputs;
597 ret->input_count = ret->nb_inputs;
603 av_freep(&ret->inputs);
604 av_freep(&ret->input_pads);
606 av_freep(&ret->outputs);
607 av_freep(&ret->output_pads);
609 av_freep(&ret->priv);
614 #if FF_API_AVFILTER_OPEN
615 int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
617 *filter_ctx = ff_filter_alloc(filter, inst_name);
618 return *filter_ctx ? 0 : AVERROR(ENOMEM);
622 void avfilter_free(AVFilterContext *filter)
631 ff_filter_graph_remove_filter(filter->graph, filter);
633 if (filter->filter->uninit)
634 filter->filter->uninit(filter);
636 for (i = 0; i < filter->nb_inputs; i++) {
637 if ((link = filter->inputs[i])) {
639 link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
640 ff_formats_unref(&link->in_formats);
641 ff_formats_unref(&link->out_formats);
642 ff_formats_unref(&link->in_samplerates);
643 ff_formats_unref(&link->out_samplerates);
644 ff_channel_layouts_unref(&link->in_channel_layouts);
645 ff_channel_layouts_unref(&link->out_channel_layouts);
647 avfilter_link_free(&link);
649 for (i = 0; i < filter->nb_outputs; i++) {
650 if ((link = filter->outputs[i])) {
652 link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
653 ff_formats_unref(&link->in_formats);
654 ff_formats_unref(&link->out_formats);
655 ff_formats_unref(&link->in_samplerates);
656 ff_formats_unref(&link->out_samplerates);
657 ff_channel_layouts_unref(&link->in_channel_layouts);
658 ff_channel_layouts_unref(&link->out_channel_layouts);
660 avfilter_link_free(&link);
663 if (filter->filter->priv_class)
664 av_opt_free(filter->priv);
666 av_freep(&filter->name);
667 av_freep(&filter->input_pads);
668 av_freep(&filter->output_pads);
669 av_freep(&filter->inputs);
670 av_freep(&filter->outputs);
671 av_freep(&filter->priv);
672 while(filter->command_queue){
673 ff_command_queue_pop(filter);
676 av_expr_free(filter->enable);
677 filter->enable = NULL;
678 av_freep(&filter->var_values);
682 static int process_options(AVFilterContext *ctx, AVDictionary **options,
685 const AVOption *o = NULL;
687 char *av_uninit(parsed_key), *av_uninit(value);
691 av_opt_set_defaults(ctx);
697 const char *shorthand = NULL;
699 o = av_opt_next(ctx->priv, o);
701 if (o->type == AV_OPT_TYPE_CONST || o->offset == offset)
707 ret = av_opt_get_key_value(&args, "=", ":",
708 shorthand ? AV_OPT_FLAG_IMPLICIT_KEY : 0,
709 &parsed_key, &value);
711 if (ret == AVERROR(EINVAL))
712 av_log(ctx, AV_LOG_ERROR, "No option name near '%s'\n", args);
714 av_log(ctx, AV_LOG_ERROR, "Unable to parse '%s': %s\n", args,
722 while ((o = av_opt_next(ctx->priv, o))); /* discard all remaining shorthand */
727 av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value);
729 if (av_opt_find(ctx, key, NULL, 0, 0)) {
730 ret = av_opt_set(ctx, key, value, 0);
734 av_dict_set(options, key, value, 0);
735 if ((ret = av_opt_set(ctx->priv, key, value, 0)) < 0) {
736 if (!av_opt_find(ctx->priv, key, NULL, 0, AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ)) {
737 if (ret == AVERROR_OPTION_NOT_FOUND)
738 av_log(ctx, AV_LOG_ERROR, "Option '%s' not found\n", key);
751 if (ctx->enable_str) {
752 ret = set_enable_expr(ctx, ctx->enable_str);
759 #if FF_API_AVFILTER_INIT_FILTER
760 int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
762 return avfilter_init_str(filter, args);
766 int avfilter_init_dict(AVFilterContext *ctx, AVDictionary **options)
770 if (ctx->filter->priv_class) {
771 ret = av_opt_set_dict(ctx->priv, options);
773 av_log(ctx, AV_LOG_ERROR, "Error applying options to the filter.\n");
778 if (ctx->filter->init_opaque)
779 ret = ctx->filter->init_opaque(ctx, NULL);
780 else if (ctx->filter->init)
781 ret = ctx->filter->init(ctx);
782 else if (ctx->filter->init_dict)
783 ret = ctx->filter->init_dict(ctx, options);
788 int avfilter_init_str(AVFilterContext *filter, const char *args)
790 AVDictionary *options = NULL;
791 AVDictionaryEntry *e;
795 if (!filter->filter->priv_class) {
796 av_log(filter, AV_LOG_ERROR, "This filter does not take any "
797 "options, but options were provided: %s.\n", args);
798 return AVERROR(EINVAL);
801 #if FF_API_OLD_FILTER_OPTS
802 if ( !strcmp(filter->filter->name, "format") ||
803 !strcmp(filter->filter->name, "noformat") ||
804 !strcmp(filter->filter->name, "frei0r") ||
805 !strcmp(filter->filter->name, "frei0r_src") ||
806 !strcmp(filter->filter->name, "ocv") ||
807 !strcmp(filter->filter->name, "pan") ||
808 !strcmp(filter->filter->name, "pp") ||
809 !strcmp(filter->filter->name, "aevalsrc")) {
810 /* a hack for compatibility with the old syntax
811 * replace colons with |s */
812 char *copy = av_strdup(args);
814 int nb_leading = 0; // number of leading colons to skip
818 ret = AVERROR(ENOMEM);
822 if (!strcmp(filter->filter->name, "frei0r") ||
823 !strcmp(filter->filter->name, "ocv"))
825 else if (!strcmp(filter->filter->name, "frei0r_src"))
828 while (nb_leading--) {
831 p = copy + strlen(copy);
837 deprecated = strchr(p, ':') != NULL;
839 if (!strcmp(filter->filter->name, "aevalsrc")) {
841 while ((p = strchr(p, ':')) && p[1] != ':') {
842 const char *epos = strchr(p + 1, '=');
843 const char *spos = strchr(p + 1, ':');
844 const int next_token_is_opt = epos && (!spos || epos < spos);
845 if (next_token_is_opt) {
849 /* next token does not contain a '=', assume a channel expression */
853 if (p && *p == ':') { // double sep '::' found
855 memmove(p, p + 1, strlen(p));
858 while ((p = strchr(p, ':')))
862 av_log(filter, AV_LOG_WARNING, "This syntax is deprecated. Use "
863 "'|' to separate the list items.\n");
865 av_log(filter, AV_LOG_DEBUG, "compat: called with args=[%s]\n", copy);
866 ret = process_options(filter, &options, copy);
874 if (!strcmp(filter->filter->name, "mp")) {
877 if (!strncmp(args, "filter=", 7))
879 ret = av_escape(&escaped, args, ":=", AV_ESCAPE_MODE_BACKSLASH, 0);
881 av_log(filter, AV_LOG_ERROR, "Unable to escape MPlayer filters arg '%s'\n", args);
884 ret = process_options(filter, &options, escaped);
888 ret = process_options(filter, &options, args);
894 ret = avfilter_init_dict(filter, &options);
898 if ((e = av_dict_get(options, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
899 av_log(filter, AV_LOG_ERROR, "No such option: %s.\n", e->key);
900 ret = AVERROR_OPTION_NOT_FOUND;
905 av_dict_free(&options);
910 const char *avfilter_pad_get_name(const AVFilterPad *pads, int pad_idx)
912 return pads[pad_idx].name;
915 enum AVMediaType avfilter_pad_get_type(const AVFilterPad *pads, int pad_idx)
917 return pads[pad_idx].type;
920 static int default_filter_frame(AVFilterLink *link, AVFrame *frame)
922 return ff_filter_frame(link->dst->outputs[0], frame);
925 static int ff_filter_frame_framed(AVFilterLink *link, AVFrame *frame)
927 int (*filter_frame)(AVFilterLink *, AVFrame *);
928 AVFilterContext *dstctx = link->dst;
929 AVFilterPad *dst = link->dstpad;
932 AVFilterCommand *cmd= link->dst->command_queue;
936 av_frame_free(&frame);
940 if (!(filter_frame = dst->filter_frame))
941 filter_frame = default_filter_frame;
943 /* copy the frame if needed */
944 if (dst->needs_writable && !av_frame_is_writable(frame)) {
945 av_log(link->dst, AV_LOG_DEBUG, "Copying data in avfilter.\n");
947 /* Maybe use ff_copy_buffer_ref instead? */
948 switch (link->type) {
949 case AVMEDIA_TYPE_VIDEO:
950 out = ff_get_video_buffer(link, link->w, link->h);
952 case AVMEDIA_TYPE_AUDIO:
953 out = ff_get_audio_buffer(link, frame->nb_samples);
955 default: return AVERROR(EINVAL);
958 av_frame_free(&frame);
959 return AVERROR(ENOMEM);
961 av_frame_copy_props(out, frame);
963 switch (link->type) {
964 case AVMEDIA_TYPE_VIDEO:
965 av_image_copy(out->data, out->linesize, (const uint8_t **)frame->data, frame->linesize,
966 frame->format, frame->width, frame->height);
968 case AVMEDIA_TYPE_AUDIO:
969 av_samples_copy(out->extended_data, frame->extended_data,
970 0, 0, frame->nb_samples,
971 av_get_channel_layout_nb_channels(frame->channel_layout),
974 default: return AVERROR(EINVAL);
977 av_frame_free(&frame);
981 while(cmd && cmd->time <= out->pts * av_q2d(link->time_base)){
982 av_log(link->dst, AV_LOG_DEBUG,
983 "Processing command time:%f command:%s arg:%s\n",
984 cmd->time, cmd->command, cmd->arg);
985 avfilter_process_command(link->dst, cmd->command, cmd->arg, 0, 0, cmd->flags);
986 ff_command_queue_pop(link->dst);
987 cmd= link->dst->command_queue;
991 if (dstctx->enable_str) {
992 int64_t pos = av_frame_get_pkt_pos(out);
993 dstctx->var_values[VAR_N] = link->frame_count;
994 dstctx->var_values[VAR_T] = pts == AV_NOPTS_VALUE ? NAN : pts * av_q2d(link->time_base);
995 dstctx->var_values[VAR_POS] = pos == -1 ? NAN : pos;
996 if (!av_expr_eval(dstctx->enable, dstctx->var_values, NULL))
997 filter_frame = dst->passthrough_filter_frame ? dst->passthrough_filter_frame
998 : default_filter_frame;
1000 ret = filter_frame(link, out);
1001 link->frame_count++;
1002 link->frame_requested = 0;
1003 ff_update_link_current_pts(link, pts);
1007 static int ff_filter_frame_needs_framing(AVFilterLink *link, AVFrame *frame)
1009 int insamples = frame->nb_samples, inpos = 0, nb_samples;
1010 AVFrame *pbuf = link->partial_buf;
1011 int nb_channels = av_frame_get_channels(frame);
1014 link->flags |= FF_LINK_FLAG_REQUEST_LOOP;
1015 /* Handle framing (min_samples, max_samples) */
1018 AVRational samples_tb = { 1, link->sample_rate };
1019 pbuf = ff_get_audio_buffer(link, link->partial_buf_size);
1021 av_log(link->dst, AV_LOG_WARNING,
1022 "Samples dropped due to memory allocation failure.\n");
1025 av_frame_copy_props(pbuf, frame);
1026 pbuf->pts = frame->pts +
1027 av_rescale_q(inpos, samples_tb, link->time_base);
1028 pbuf->nb_samples = 0;
1030 nb_samples = FFMIN(insamples,
1031 link->partial_buf_size - pbuf->nb_samples);
1032 av_samples_copy(pbuf->extended_data, frame->extended_data,
1033 pbuf->nb_samples, inpos,
1034 nb_samples, nb_channels, link->format);
1035 inpos += nb_samples;
1036 insamples -= nb_samples;
1037 pbuf->nb_samples += nb_samples;
1038 if (pbuf->nb_samples >= link->min_samples) {
1039 ret = ff_filter_frame_framed(link, pbuf);
1043 av_frame_free(&frame);
1044 link->partial_buf = pbuf;
1048 int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
1050 FF_TPRINTF_START(NULL, filter_frame); ff_tlog_link(NULL, link, 1); ff_tlog(NULL, " "); ff_tlog_ref(NULL, frame, 1);
1052 /* Consistency checks */
1053 if (link->type == AVMEDIA_TYPE_VIDEO) {
1054 if (strcmp(link->dst->filter->name, "scale")) {
1055 av_assert1(frame->format == link->format);
1056 av_assert1(frame->width == link->w);
1057 av_assert1(frame->height == link->h);
1060 av_assert1(frame->format == link->format);
1061 av_assert1(av_frame_get_channels(frame) == link->channels);
1062 av_assert1(frame->channel_layout == link->channel_layout);
1063 av_assert1(frame->sample_rate == link->sample_rate);
1066 /* Go directly to actual filtering if possible */
1067 if (link->type == AVMEDIA_TYPE_AUDIO &&
1068 link->min_samples &&
1069 (link->partial_buf ||
1070 frame->nb_samples < link->min_samples ||
1071 frame->nb_samples > link->max_samples)) {
1072 return ff_filter_frame_needs_framing(link, frame);
1074 return ff_filter_frame_framed(link, frame);
1078 const AVClass *avfilter_get_class(void)
1080 return &avfilter_class;