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);
171 ff_video_frame_pool_uninit((FFVideoFramePool**)&(*link)->video_frame_pool);
176 int avfilter_link_get_channels(AVFilterLink *link)
178 return link->channels;
181 void ff_avfilter_link_set_in_status(AVFilterLink *link, int status, int64_t pts)
183 ff_avfilter_link_set_out_status(link, status, pts);
186 void ff_avfilter_link_set_out_status(AVFilterLink *link, int status, int64_t pts)
188 link->status = status;
189 link->frame_wanted_in = link->frame_wanted_out = 0;
190 ff_update_link_current_pts(link, pts);
193 void avfilter_link_set_closed(AVFilterLink *link, int closed)
195 ff_avfilter_link_set_out_status(link, closed ? AVERROR_EOF : 0, AV_NOPTS_VALUE);
198 int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
199 unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
202 unsigned dstpad_idx = link->dstpad - link->dst->input_pads;
204 av_log(link->dst, AV_LOG_VERBOSE, "auto-inserting filter '%s' "
205 "between the filter '%s' and the filter '%s'\n",
206 filt->name, link->src->name, link->dst->name);
208 link->dst->inputs[dstpad_idx] = NULL;
209 if ((ret = avfilter_link(filt, filt_dstpad_idx, link->dst, dstpad_idx)) < 0) {
210 /* failed to link output filter to new filter */
211 link->dst->inputs[dstpad_idx] = link;
215 /* re-hookup the link to the new destination filter we inserted */
217 link->dstpad = &filt->input_pads[filt_srcpad_idx];
218 filt->inputs[filt_srcpad_idx] = link;
220 /* if any information on supported media formats already exists on the
221 * link, we need to preserve that */
222 if (link->out_formats)
223 ff_formats_changeref(&link->out_formats,
224 &filt->outputs[filt_dstpad_idx]->out_formats);
225 if (link->out_samplerates)
226 ff_formats_changeref(&link->out_samplerates,
227 &filt->outputs[filt_dstpad_idx]->out_samplerates);
228 if (link->out_channel_layouts)
229 ff_channel_layouts_changeref(&link->out_channel_layouts,
230 &filt->outputs[filt_dstpad_idx]->out_channel_layouts);
235 int avfilter_config_links(AVFilterContext *filter)
237 int (*config_link)(AVFilterLink *);
241 for (i = 0; i < filter->nb_inputs; i ++) {
242 AVFilterLink *link = filter->inputs[i];
243 AVFilterLink *inlink;
246 if (!link->src || !link->dst) {
247 av_log(filter, AV_LOG_ERROR,
248 "Not all input and output are properly linked (%d).\n", i);
249 return AVERROR(EINVAL);
252 inlink = link->src->nb_inputs ? link->src->inputs[0] : NULL;
254 link->current_pts_us = AV_NOPTS_VALUE;
256 switch (link->init_state) {
259 case AVLINK_STARTINIT:
260 av_log(filter, AV_LOG_INFO, "circular filter chain detected\n");
263 link->init_state = AVLINK_STARTINIT;
265 if ((ret = avfilter_config_links(link->src)) < 0)
268 if (!(config_link = link->srcpad->config_props)) {
269 if (link->src->nb_inputs != 1) {
270 av_log(link->src, AV_LOG_ERROR, "Source filters and filters "
271 "with more than one input "
272 "must set config_props() "
273 "callbacks on all outputs\n");
274 return AVERROR(EINVAL);
276 } else if ((ret = config_link(link)) < 0) {
277 av_log(link->src, AV_LOG_ERROR,
278 "Failed to configure output pad on %s\n",
283 switch (link->type) {
284 case AVMEDIA_TYPE_VIDEO:
285 if (!link->time_base.num && !link->time_base.den)
286 link->time_base = inlink ? inlink->time_base : AV_TIME_BASE_Q;
288 if (!link->sample_aspect_ratio.num && !link->sample_aspect_ratio.den)
289 link->sample_aspect_ratio = inlink ?
290 inlink->sample_aspect_ratio : (AVRational){1,1};
293 if (!link->frame_rate.num && !link->frame_rate.den)
294 link->frame_rate = inlink->frame_rate;
299 } else if (!link->w || !link->h) {
300 av_log(link->src, AV_LOG_ERROR,
301 "Video source filters must set their output link's "
302 "width and height\n");
303 return AVERROR(EINVAL);
307 case AVMEDIA_TYPE_AUDIO:
309 if (!link->time_base.num && !link->time_base.den)
310 link->time_base = inlink->time_base;
313 if (!link->time_base.num && !link->time_base.den)
314 link->time_base = (AVRational) {1, link->sample_rate};
317 if ((config_link = link->dstpad->config_props))
318 if ((ret = config_link(link)) < 0) {
319 av_log(link->dst, AV_LOG_ERROR,
320 "Failed to configure input pad on %s\n",
325 link->init_state = AVLINK_INIT;
332 void ff_tlog_link(void *ctx, AVFilterLink *link, int end)
334 if (link->type == AVMEDIA_TYPE_VIDEO) {
336 "link[%p s:%dx%d fmt:%s %s->%s]%s",
337 link, link->w, link->h,
338 av_get_pix_fmt_name(link->format),
339 link->src ? link->src->filter->name : "",
340 link->dst ? link->dst->filter->name : "",
344 av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);
347 "link[%p r:%d cl:%s fmt:%s %s->%s]%s",
348 link, (int)link->sample_rate, buf,
349 av_get_sample_fmt_name(link->format),
350 link->src ? link->src->filter->name : "",
351 link->dst ? link->dst->filter->name : "",
356 int ff_request_frame(AVFilterLink *link)
358 FF_TPRINTF_START(NULL, request_frame); ff_tlog_link(NULL, link, 1);
362 link->frame_wanted_in = 1;
363 link->frame_wanted_out = 1;
367 int ff_request_frame_to_filter(AVFilterLink *link)
371 FF_TPRINTF_START(NULL, request_frame_to_filter); ff_tlog_link(NULL, link, 1);
372 link->frame_wanted_in = 0;
373 if (link->srcpad->request_frame)
374 ret = link->srcpad->request_frame(link);
375 else if (link->src->inputs[0])
376 ret = ff_request_frame(link->src->inputs[0]);
377 if (ret == AVERROR_EOF && link->partial_buf) {
378 AVFrame *pbuf = link->partial_buf;
379 link->partial_buf = NULL;
380 ret = ff_filter_frame_framed(link, pbuf);
381 ff_avfilter_link_set_in_status(link, AVERROR_EOF, AV_NOPTS_VALUE);
382 link->frame_wanted_out = 0;
386 if (ret != AVERROR(EAGAIN) && ret != link->status)
387 ff_avfilter_link_set_in_status(link, ret, AV_NOPTS_VALUE);
392 int ff_poll_frame(AVFilterLink *link)
394 int i, min = INT_MAX;
396 if (link->srcpad->poll_frame)
397 return link->srcpad->poll_frame(link);
399 for (i = 0; i < link->src->nb_inputs; i++) {
401 if (!link->src->inputs[i])
402 return AVERROR(EINVAL);
403 val = ff_poll_frame(link->src->inputs[i]);
404 min = FFMIN(min, val);
410 static const char *const var_names[] = {
428 static int set_enable_expr(AVFilterContext *ctx, const char *expr)
432 AVExpr *old = ctx->enable;
434 if (!(ctx->filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE)) {
435 av_log(ctx, AV_LOG_ERROR, "Timeline ('enable' option) not supported "
436 "with filter '%s'\n", ctx->filter->name);
437 return AVERROR_PATCHWELCOME;
440 expr_dup = av_strdup(expr);
442 return AVERROR(ENOMEM);
444 if (!ctx->var_values) {
445 ctx->var_values = av_calloc(VAR_VARS_NB, sizeof(*ctx->var_values));
446 if (!ctx->var_values) {
448 return AVERROR(ENOMEM);
452 ret = av_expr_parse((AVExpr**)&ctx->enable, expr_dup, var_names,
453 NULL, NULL, NULL, NULL, 0, ctx->priv);
455 av_log(ctx->priv, AV_LOG_ERROR,
456 "Error when evaluating the expression '%s' for enable\n",
463 av_free(ctx->enable_str);
464 ctx->enable_str = expr_dup;
468 void ff_update_link_current_pts(AVFilterLink *link, int64_t pts)
470 if (pts == AV_NOPTS_VALUE)
472 link->current_pts = pts;
473 link->current_pts_us = av_rescale_q(pts, link->time_base, AV_TIME_BASE_Q);
474 /* TODO use duration */
475 if (link->graph && link->age_index >= 0)
476 ff_avfilter_graph_update_heap(link->graph, link);
479 int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags)
481 if(!strcmp(cmd, "ping")){
482 char local_res[256] = {0};
486 res_len = sizeof(local_res);
488 av_strlcatf(res, res_len, "pong from:%s %s\n", filter->filter->name, filter->name);
489 if (res == local_res)
490 av_log(filter, AV_LOG_INFO, "%s", res);
492 }else if(!strcmp(cmd, "enable")) {
493 return set_enable_expr(filter, arg);
494 }else if(filter->filter->process_command) {
495 return filter->filter->process_command(filter, cmd, arg, res, res_len, flags);
497 return AVERROR(ENOSYS);
500 static AVFilter *first_filter;
501 static AVFilter **last_filter = &first_filter;
503 #if !FF_API_NOCONST_GET_NAME
506 AVFilter *avfilter_get_by_name(const char *name)
508 const AVFilter *f = NULL;
513 while ((f = avfilter_next(f)))
514 if (!strcmp(f->name, name))
515 return (AVFilter *)f;
520 int avfilter_register(AVFilter *filter)
522 AVFilter **f = last_filter;
524 /* the filter must select generic or internal exclusively */
525 av_assert0((filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE) != AVFILTER_FLAG_SUPPORT_TIMELINE);
529 while(*f || avpriv_atomic_ptr_cas((void * volatile *)f, NULL, filter))
531 last_filter = &filter->next;
536 const AVFilter *avfilter_next(const AVFilter *prev)
538 return prev ? prev->next : first_filter;
541 #if FF_API_OLD_FILTER_REGISTER
542 AVFilter **av_filter_next(AVFilter **filter)
544 return filter ? &(*filter)->next : &first_filter;
547 void avfilter_uninit(void)
552 int avfilter_pad_count(const AVFilterPad *pads)
559 for (count = 0; pads->name; count++)
564 static const char *default_filter_name(void *filter_ctx)
566 AVFilterContext *ctx = filter_ctx;
567 return ctx->name ? ctx->name : ctx->filter->name;
570 static void *filter_child_next(void *obj, void *prev)
572 AVFilterContext *ctx = obj;
573 if (!prev && ctx->filter && ctx->filter->priv_class && ctx->priv)
578 static const AVClass *filter_child_class_next(const AVClass *prev)
580 const AVFilter *f = NULL;
582 /* find the filter that corresponds to prev */
583 while (prev && (f = avfilter_next(f)))
584 if (f->priv_class == prev)
587 /* could not find filter corresponding to prev */
591 /* find next filter with specific options */
592 while ((f = avfilter_next(f)))
594 return f->priv_class;
599 #define OFFSET(x) offsetof(AVFilterContext, x)
600 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM
601 static const AVOption avfilter_options[] = {
602 { "thread_type", "Allowed thread types", OFFSET(thread_type), AV_OPT_TYPE_FLAGS,
603 { .i64 = AVFILTER_THREAD_SLICE }, 0, INT_MAX, FLAGS, "thread_type" },
604 { "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .unit = "thread_type" },
605 { "enable", "set enable expression", OFFSET(enable_str), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
609 static const AVClass avfilter_class = {
610 .class_name = "AVFilter",
611 .item_name = default_filter_name,
612 .version = LIBAVUTIL_VERSION_INT,
613 .category = AV_CLASS_CATEGORY_FILTER,
614 .child_next = filter_child_next,
615 .child_class_next = filter_child_class_next,
616 .option = avfilter_options,
619 static int default_execute(AVFilterContext *ctx, avfilter_action_func *func, void *arg,
620 int *ret, int nb_jobs)
624 for (i = 0; i < nb_jobs; i++) {
625 int r = func(ctx, arg, i, nb_jobs);
632 AVFilterContext *ff_filter_alloc(const AVFilter *filter, const char *inst_name)
634 AVFilterContext *ret;
639 ret = av_mallocz(sizeof(AVFilterContext));
643 ret->av_class = &avfilter_class;
644 ret->filter = filter;
645 ret->name = inst_name ? av_strdup(inst_name) : NULL;
646 if (filter->priv_size) {
647 ret->priv = av_mallocz(filter->priv_size);
652 av_opt_set_defaults(ret);
653 if (filter->priv_class) {
654 *(const AVClass**)ret->priv = filter->priv_class;
655 av_opt_set_defaults(ret->priv);
658 ret->internal = av_mallocz(sizeof(*ret->internal));
661 ret->internal->execute = default_execute;
663 ret->nb_inputs = avfilter_pad_count(filter->inputs);
664 if (ret->nb_inputs ) {
665 ret->input_pads = av_malloc_array(ret->nb_inputs, sizeof(AVFilterPad));
666 if (!ret->input_pads)
668 memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->nb_inputs);
669 ret->inputs = av_mallocz_array(ret->nb_inputs, sizeof(AVFilterLink*));
674 ret->nb_outputs = avfilter_pad_count(filter->outputs);
675 if (ret->nb_outputs) {
676 ret->output_pads = av_malloc_array(ret->nb_outputs, sizeof(AVFilterPad));
677 if (!ret->output_pads)
679 memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->nb_outputs);
680 ret->outputs = av_mallocz_array(ret->nb_outputs, sizeof(AVFilterLink*));
688 av_freep(&ret->inputs);
689 av_freep(&ret->input_pads);
691 av_freep(&ret->outputs);
692 av_freep(&ret->output_pads);
694 av_freep(&ret->priv);
695 av_freep(&ret->internal);
700 #if FF_API_AVFILTER_OPEN
701 int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
703 *filter_ctx = ff_filter_alloc(filter, inst_name);
704 return *filter_ctx ? 0 : AVERROR(ENOMEM);
708 static void free_link(AVFilterLink *link)
714 link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
716 link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
718 ff_formats_unref(&link->in_formats);
719 ff_formats_unref(&link->out_formats);
720 ff_formats_unref(&link->in_samplerates);
721 ff_formats_unref(&link->out_samplerates);
722 ff_channel_layouts_unref(&link->in_channel_layouts);
723 ff_channel_layouts_unref(&link->out_channel_layouts);
724 avfilter_link_free(&link);
727 void avfilter_free(AVFilterContext *filter)
735 ff_filter_graph_remove_filter(filter->graph, filter);
737 if (filter->filter->uninit)
738 filter->filter->uninit(filter);
740 for (i = 0; i < filter->nb_inputs; i++) {
741 free_link(filter->inputs[i]);
743 for (i = 0; i < filter->nb_outputs; i++) {
744 free_link(filter->outputs[i]);
747 if (filter->filter->priv_class)
748 av_opt_free(filter->priv);
750 av_freep(&filter->name);
751 av_freep(&filter->input_pads);
752 av_freep(&filter->output_pads);
753 av_freep(&filter->inputs);
754 av_freep(&filter->outputs);
755 av_freep(&filter->priv);
756 while(filter->command_queue){
757 ff_command_queue_pop(filter);
760 av_expr_free(filter->enable);
761 filter->enable = NULL;
762 av_freep(&filter->var_values);
763 av_freep(&filter->internal);
767 static int process_options(AVFilterContext *ctx, AVDictionary **options,
770 const AVOption *o = NULL;
772 char *av_uninit(parsed_key), *av_uninit(value);
780 const char *shorthand = NULL;
782 o = av_opt_next(ctx->priv, o);
784 if (o->type == AV_OPT_TYPE_CONST || o->offset == offset)
790 ret = av_opt_get_key_value(&args, "=", ":",
791 shorthand ? AV_OPT_FLAG_IMPLICIT_KEY : 0,
792 &parsed_key, &value);
794 if (ret == AVERROR(EINVAL))
795 av_log(ctx, AV_LOG_ERROR, "No option name near '%s'\n", args);
797 av_log(ctx, AV_LOG_ERROR, "Unable to parse '%s': %s\n", args,
805 while ((o = av_opt_next(ctx->priv, o))); /* discard all remaining shorthand */
810 av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value);
812 if (av_opt_find(ctx, key, NULL, 0, 0)) {
813 ret = av_opt_set(ctx, key, value, 0);
820 av_dict_set(options, key, value, 0);
821 if ((ret = av_opt_set(ctx->priv, key, value, 0)) < 0) {
822 if (!av_opt_find(ctx->priv, key, NULL, 0, AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ)) {
823 if (ret == AVERROR_OPTION_NOT_FOUND)
824 av_log(ctx, AV_LOG_ERROR, "Option '%s' not found\n", key);
837 if (ctx->enable_str) {
838 ret = set_enable_expr(ctx, ctx->enable_str);
845 #if FF_API_AVFILTER_INIT_FILTER
846 int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
848 return avfilter_init_str(filter, args);
852 int avfilter_init_dict(AVFilterContext *ctx, AVDictionary **options)
856 ret = av_opt_set_dict(ctx, options);
858 av_log(ctx, AV_LOG_ERROR, "Error applying generic filter options.\n");
862 if (ctx->filter->flags & AVFILTER_FLAG_SLICE_THREADS &&
863 ctx->thread_type & ctx->graph->thread_type & AVFILTER_THREAD_SLICE &&
864 ctx->graph->internal->thread_execute) {
865 ctx->thread_type = AVFILTER_THREAD_SLICE;
866 ctx->internal->execute = ctx->graph->internal->thread_execute;
868 ctx->thread_type = 0;
871 if (ctx->filter->priv_class) {
872 ret = av_opt_set_dict(ctx->priv, options);
874 av_log(ctx, AV_LOG_ERROR, "Error applying options to the filter.\n");
879 if (ctx->filter->init_opaque)
880 ret = ctx->filter->init_opaque(ctx, NULL);
881 else if (ctx->filter->init)
882 ret = ctx->filter->init(ctx);
883 else if (ctx->filter->init_dict)
884 ret = ctx->filter->init_dict(ctx, options);
889 int avfilter_init_str(AVFilterContext *filter, const char *args)
891 AVDictionary *options = NULL;
892 AVDictionaryEntry *e;
896 if (!filter->filter->priv_class) {
897 av_log(filter, AV_LOG_ERROR, "This filter does not take any "
898 "options, but options were provided: %s.\n", args);
899 return AVERROR(EINVAL);
902 #if FF_API_OLD_FILTER_OPTS || FF_API_OLD_FILTER_OPTS_ERROR
903 if ( !strcmp(filter->filter->name, "format") ||
904 !strcmp(filter->filter->name, "noformat") ||
905 !strcmp(filter->filter->name, "frei0r") ||
906 !strcmp(filter->filter->name, "frei0r_src") ||
907 !strcmp(filter->filter->name, "ocv") ||
908 !strcmp(filter->filter->name, "pan") ||
909 !strcmp(filter->filter->name, "pp") ||
910 !strcmp(filter->filter->name, "aevalsrc")) {
911 /* a hack for compatibility with the old syntax
912 * replace colons with |s */
913 char *copy = av_strdup(args);
915 int nb_leading = 0; // number of leading colons to skip
919 ret = AVERROR(ENOMEM);
923 if (!strcmp(filter->filter->name, "frei0r") ||
924 !strcmp(filter->filter->name, "ocv"))
926 else if (!strcmp(filter->filter->name, "frei0r_src"))
929 while (nb_leading--) {
932 p = copy + strlen(copy);
938 deprecated = strchr(p, ':') != NULL;
940 if (!strcmp(filter->filter->name, "aevalsrc")) {
942 while ((p = strchr(p, ':')) && p[1] != ':') {
943 const char *epos = strchr(p + 1, '=');
944 const char *spos = strchr(p + 1, ':');
945 const int next_token_is_opt = epos && (!spos || epos < spos);
946 if (next_token_is_opt) {
950 /* next token does not contain a '=', assume a channel expression */
954 if (p && *p == ':') { // double sep '::' found
956 memmove(p, p + 1, strlen(p));
959 while ((p = strchr(p, ':')))
962 #if FF_API_OLD_FILTER_OPTS
964 av_log(filter, AV_LOG_WARNING, "This syntax is deprecated. Use "
965 "'|' to separate the list items.\n");
967 av_log(filter, AV_LOG_DEBUG, "compat: called with args=[%s]\n", copy);
968 ret = process_options(filter, &options, copy);
971 av_log(filter, AV_LOG_ERROR, "This syntax is deprecated. Use "
972 "'|' to separate the list items ('%s' instead of '%s')\n",
974 ret = AVERROR(EINVAL);
976 ret = process_options(filter, &options, copy);
986 ret = process_options(filter, &options, args);
992 ret = avfilter_init_dict(filter, &options);
996 if ((e = av_dict_get(options, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
997 av_log(filter, AV_LOG_ERROR, "No such option: %s.\n", e->key);
998 ret = AVERROR_OPTION_NOT_FOUND;
1003 av_dict_free(&options);
1008 const char *avfilter_pad_get_name(const AVFilterPad *pads, int pad_idx)
1010 return pads[pad_idx].name;
1013 enum AVMediaType avfilter_pad_get_type(const AVFilterPad *pads, int pad_idx)
1015 return pads[pad_idx].type;
1018 static int default_filter_frame(AVFilterLink *link, AVFrame *frame)
1020 return ff_filter_frame(link->dst->outputs[0], frame);
1023 static int ff_filter_frame_framed(AVFilterLink *link, AVFrame *frame)
1025 int (*filter_frame)(AVFilterLink *, AVFrame *);
1026 AVFilterContext *dstctx = link->dst;
1027 AVFilterPad *dst = link->dstpad;
1028 AVFrame *out = NULL;
1030 AVFilterCommand *cmd= link->dst->command_queue;
1034 av_frame_free(&frame);
1035 return link->status;
1038 if (!(filter_frame = dst->filter_frame))
1039 filter_frame = default_filter_frame;
1041 /* copy the frame if needed */
1042 if (dst->needs_writable && !av_frame_is_writable(frame)) {
1043 av_log(link->dst, AV_LOG_DEBUG, "Copying data in avfilter.\n");
1045 switch (link->type) {
1046 case AVMEDIA_TYPE_VIDEO:
1047 out = ff_get_video_buffer(link, link->w, link->h);
1049 case AVMEDIA_TYPE_AUDIO:
1050 out = ff_get_audio_buffer(link, frame->nb_samples);
1053 ret = AVERROR(EINVAL);
1057 ret = AVERROR(ENOMEM);
1061 ret = av_frame_copy_props(out, frame);
1065 switch (link->type) {
1066 case AVMEDIA_TYPE_VIDEO:
1067 av_image_copy(out->data, out->linesize, (const uint8_t **)frame->data, frame->linesize,
1068 frame->format, frame->width, frame->height);
1070 case AVMEDIA_TYPE_AUDIO:
1071 av_samples_copy(out->extended_data, frame->extended_data,
1072 0, 0, frame->nb_samples,
1073 av_get_channel_layout_nb_channels(frame->channel_layout),
1077 ret = AVERROR(EINVAL);
1081 av_frame_free(&frame);
1085 while(cmd && cmd->time <= out->pts * av_q2d(link->time_base)){
1086 av_log(link->dst, AV_LOG_DEBUG,
1087 "Processing command time:%f command:%s arg:%s\n",
1088 cmd->time, cmd->command, cmd->arg);
1089 avfilter_process_command(link->dst, cmd->command, cmd->arg, 0, 0, cmd->flags);
1090 ff_command_queue_pop(link->dst);
1091 cmd= link->dst->command_queue;
1095 if (dstctx->enable_str) {
1096 int64_t pos = av_frame_get_pkt_pos(out);
1097 dstctx->var_values[VAR_N] = link->frame_count;
1098 dstctx->var_values[VAR_T] = pts == AV_NOPTS_VALUE ? NAN : pts * av_q2d(link->time_base);
1099 dstctx->var_values[VAR_W] = link->w;
1100 dstctx->var_values[VAR_H] = link->h;
1101 dstctx->var_values[VAR_POS] = pos == -1 ? NAN : pos;
1103 dstctx->is_disabled = fabs(av_expr_eval(dstctx->enable, dstctx->var_values, NULL)) < 0.5;
1104 if (dstctx->is_disabled &&
1105 (dstctx->filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC))
1106 filter_frame = default_filter_frame;
1108 ret = filter_frame(link, out);
1109 link->frame_count++;
1110 ff_update_link_current_pts(link, pts);
1114 av_frame_free(&out);
1115 av_frame_free(&frame);
1119 static int ff_filter_frame_needs_framing(AVFilterLink *link, AVFrame *frame)
1121 int insamples = frame->nb_samples, inpos = 0, nb_samples;
1122 AVFrame *pbuf = link->partial_buf;
1123 int nb_channels = av_frame_get_channels(frame);
1126 /* Handle framing (min_samples, max_samples) */
1129 AVRational samples_tb = { 1, link->sample_rate };
1130 pbuf = ff_get_audio_buffer(link, link->partial_buf_size);
1132 av_log(link->dst, AV_LOG_WARNING,
1133 "Samples dropped due to memory allocation failure.\n");
1136 av_frame_copy_props(pbuf, frame);
1137 pbuf->pts = frame->pts;
1138 if (pbuf->pts != AV_NOPTS_VALUE)
1139 pbuf->pts += av_rescale_q(inpos, samples_tb, link->time_base);
1140 pbuf->nb_samples = 0;
1142 nb_samples = FFMIN(insamples,
1143 link->partial_buf_size - pbuf->nb_samples);
1144 av_samples_copy(pbuf->extended_data, frame->extended_data,
1145 pbuf->nb_samples, inpos,
1146 nb_samples, nb_channels, link->format);
1147 inpos += nb_samples;
1148 insamples -= nb_samples;
1149 pbuf->nb_samples += nb_samples;
1150 if (pbuf->nb_samples >= link->min_samples) {
1151 ret = ff_filter_frame_framed(link, pbuf);
1154 if (link->frame_wanted_out)
1155 link->frame_wanted_in = 1;
1158 av_frame_free(&frame);
1159 link->partial_buf = pbuf;
1163 int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
1165 FF_TPRINTF_START(NULL, filter_frame); ff_tlog_link(NULL, link, 1); ff_tlog(NULL, " "); ff_tlog_ref(NULL, frame, 1);
1167 /* Consistency checks */
1168 if (link->type == AVMEDIA_TYPE_VIDEO) {
1169 if (strcmp(link->dst->filter->name, "buffersink") &&
1170 strcmp(link->dst->filter->name, "format") &&
1171 strcmp(link->dst->filter->name, "idet") &&
1172 strcmp(link->dst->filter->name, "null") &&
1173 strcmp(link->dst->filter->name, "scale")) {
1174 av_assert1(frame->format == link->format);
1175 av_assert1(frame->width == link->w);
1176 av_assert1(frame->height == link->h);
1179 if (frame->format != link->format) {
1180 av_log(link->dst, AV_LOG_ERROR, "Format change is not supported\n");
1183 if (av_frame_get_channels(frame) != link->channels) {
1184 av_log(link->dst, AV_LOG_ERROR, "Channel count change is not supported\n");
1187 if (frame->channel_layout != link->channel_layout) {
1188 av_log(link->dst, AV_LOG_ERROR, "Channel layout change is not supported\n");
1191 if (frame->sample_rate != link->sample_rate) {
1192 av_log(link->dst, AV_LOG_ERROR, "Sample rate change is not supported\n");
1197 link->frame_wanted_out = 0;
1198 /* Go directly to actual filtering if possible */
1199 if (link->type == AVMEDIA_TYPE_AUDIO &&
1200 link->min_samples &&
1201 (link->partial_buf ||
1202 frame->nb_samples < link->min_samples ||
1203 frame->nb_samples > link->max_samples)) {
1204 return ff_filter_frame_needs_framing(link, frame);
1206 return ff_filter_frame_framed(link, frame);
1209 av_frame_free(&frame);
1210 return AVERROR_PATCHWELCOME;
1213 const AVClass *avfilter_get_class(void)
1215 return &avfilter_class;