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/buffer.h"
26 #include "libavutil/channel_layout.h"
27 #include "libavutil/common.h"
28 #include "libavutil/eval.h"
29 #include "libavutil/hwcontext.h"
30 #include "libavutil/imgutils.h"
31 #include "libavutil/internal.h"
32 #include "libavutil/opt.h"
33 #include "libavutil/pixdesc.h"
34 #include "libavutil/rational.h"
35 #include "libavutil/samplefmt.h"
42 #include "libavutil/ffversion.h"
43 const char av_filter_ffversion[] = "FFmpeg version " FFMPEG_VERSION;
45 static int ff_filter_frame_framed(AVFilterLink *link, AVFrame *frame);
47 void ff_tlog_ref(void *ctx, AVFrame *ref, int end)
49 av_unused char buf[16];
51 "ref[%p buf:%p data:%p linesize[%d, %d, %d, %d] pts:%"PRId64" pos:%"PRId64,
52 ref, ref->buf, ref->data[0],
53 ref->linesize[0], ref->linesize[1], ref->linesize[2], ref->linesize[3],
54 ref->pts, av_frame_get_pkt_pos(ref));
57 ff_tlog(ctx, " a:%d/%d s:%dx%d i:%c iskey:%d type:%c",
58 ref->sample_aspect_ratio.num, ref->sample_aspect_ratio.den,
59 ref->width, ref->height,
60 !ref->interlaced_frame ? 'P' : /* Progressive */
61 ref->top_field_first ? 'T' : 'B', /* Top / Bottom */
63 av_get_picture_type_char(ref->pict_type));
65 if (ref->nb_samples) {
66 ff_tlog(ctx, " cl:%"PRId64"d n:%d r:%d",
72 ff_tlog(ctx, "]%s", end ? "\n" : "");
75 unsigned avfilter_version(void)
77 av_assert0(LIBAVFILTER_VERSION_MICRO >= 100);
78 return LIBAVFILTER_VERSION_INT;
81 const char *avfilter_configuration(void)
83 return FFMPEG_CONFIGURATION;
86 const char *avfilter_license(void)
88 #define LICENSE_PREFIX "libavfilter license: "
89 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
92 void ff_command_queue_pop(AVFilterContext *filter)
94 AVFilterCommand *c= filter->command_queue;
96 av_freep(&c->command);
97 filter->command_queue= c->next;
101 int ff_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
102 AVFilterPad **pads, AVFilterLink ***links,
105 AVFilterLink **newlinks;
106 AVFilterPad *newpads;
109 idx = FFMIN(idx, *count);
111 newpads = av_realloc_array(*pads, *count + 1, sizeof(AVFilterPad));
112 newlinks = av_realloc_array(*links, *count + 1, sizeof(AVFilterLink*));
117 if (!newpads || !newlinks)
118 return AVERROR(ENOMEM);
120 memmove(*pads + idx + 1, *pads + idx, sizeof(AVFilterPad) * (*count - idx));
121 memmove(*links + idx + 1, *links + idx, sizeof(AVFilterLink*) * (*count - idx));
122 memcpy(*pads + idx, newpad, sizeof(AVFilterPad));
123 (*links)[idx] = NULL;
126 for (i = idx + 1; i < *count; i++)
128 (*(unsigned *)((uint8_t *) (*links)[i] + padidx_off))++;
133 int avfilter_link(AVFilterContext *src, unsigned srcpad,
134 AVFilterContext *dst, unsigned dstpad)
138 if (src->nb_outputs <= srcpad || dst->nb_inputs <= dstpad ||
139 src->outputs[srcpad] || dst->inputs[dstpad])
140 return AVERROR(EINVAL);
142 if (src->output_pads[srcpad].type != dst->input_pads[dstpad].type) {
143 av_log(src, AV_LOG_ERROR,
144 "Media type mismatch between the '%s' filter output pad %d (%s) and the '%s' filter input pad %d (%s)\n",
145 src->name, srcpad, (char *)av_x_if_null(av_get_media_type_string(src->output_pads[srcpad].type), "?"),
146 dst->name, dstpad, (char *)av_x_if_null(av_get_media_type_string(dst-> input_pads[dstpad].type), "?"));
147 return AVERROR(EINVAL);
150 link = av_mallocz(sizeof(*link));
152 return AVERROR(ENOMEM);
154 src->outputs[srcpad] = dst->inputs[dstpad] = link;
158 link->srcpad = &src->output_pads[srcpad];
159 link->dstpad = &dst->input_pads[dstpad];
160 link->type = src->output_pads[srcpad].type;
161 av_assert0(AV_PIX_FMT_NONE == -1 && AV_SAMPLE_FMT_NONE == -1);
167 void avfilter_link_free(AVFilterLink **link)
172 av_frame_free(&(*link)->partial_buf);
173 ff_video_frame_pool_uninit((FFVideoFramePool**)&(*link)->video_frame_pool);
178 int avfilter_link_get_channels(AVFilterLink *link)
180 return link->channels;
183 void ff_avfilter_link_set_in_status(AVFilterLink *link, int status, int64_t pts)
185 ff_avfilter_link_set_out_status(link, status, pts);
188 void ff_avfilter_link_set_out_status(AVFilterLink *link, int status, int64_t pts)
190 link->status = status;
191 link->frame_wanted_in = link->frame_wanted_out = 0;
192 ff_update_link_current_pts(link, pts);
195 void avfilter_link_set_closed(AVFilterLink *link, int closed)
197 ff_avfilter_link_set_out_status(link, closed ? AVERROR_EOF : 0, AV_NOPTS_VALUE);
200 int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
201 unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
204 unsigned dstpad_idx = link->dstpad - link->dst->input_pads;
206 av_log(link->dst, AV_LOG_VERBOSE, "auto-inserting filter '%s' "
207 "between the filter '%s' and the filter '%s'\n",
208 filt->name, link->src->name, link->dst->name);
210 link->dst->inputs[dstpad_idx] = NULL;
211 if ((ret = avfilter_link(filt, filt_dstpad_idx, link->dst, dstpad_idx)) < 0) {
212 /* failed to link output filter to new filter */
213 link->dst->inputs[dstpad_idx] = link;
217 /* re-hookup the link to the new destination filter we inserted */
219 link->dstpad = &filt->input_pads[filt_srcpad_idx];
220 filt->inputs[filt_srcpad_idx] = link;
222 /* if any information on supported media formats already exists on the
223 * link, we need to preserve that */
224 if (link->out_formats)
225 ff_formats_changeref(&link->out_formats,
226 &filt->outputs[filt_dstpad_idx]->out_formats);
227 if (link->out_samplerates)
228 ff_formats_changeref(&link->out_samplerates,
229 &filt->outputs[filt_dstpad_idx]->out_samplerates);
230 if (link->out_channel_layouts)
231 ff_channel_layouts_changeref(&link->out_channel_layouts,
232 &filt->outputs[filt_dstpad_idx]->out_channel_layouts);
237 int avfilter_config_links(AVFilterContext *filter)
239 int (*config_link)(AVFilterLink *);
243 for (i = 0; i < filter->nb_inputs; i ++) {
244 AVFilterLink *link = filter->inputs[i];
245 AVFilterLink *inlink;
248 if (!link->src || !link->dst) {
249 av_log(filter, AV_LOG_ERROR,
250 "Not all input and output are properly linked (%d).\n", i);
251 return AVERROR(EINVAL);
254 inlink = link->src->nb_inputs ? link->src->inputs[0] : NULL;
256 link->current_pts_us = AV_NOPTS_VALUE;
258 switch (link->init_state) {
261 case AVLINK_STARTINIT:
262 av_log(filter, AV_LOG_INFO, "circular filter chain detected\n");
265 link->init_state = AVLINK_STARTINIT;
267 if ((ret = avfilter_config_links(link->src)) < 0)
270 if (!(config_link = link->srcpad->config_props)) {
271 if (link->src->nb_inputs != 1) {
272 av_log(link->src, AV_LOG_ERROR, "Source filters and filters "
273 "with more than one input "
274 "must set config_props() "
275 "callbacks on all outputs\n");
276 return AVERROR(EINVAL);
278 } else if ((ret = config_link(link)) < 0) {
279 av_log(link->src, AV_LOG_ERROR,
280 "Failed to configure output pad on %s\n",
285 switch (link->type) {
286 case AVMEDIA_TYPE_VIDEO:
287 if (!link->time_base.num && !link->time_base.den)
288 link->time_base = inlink ? inlink->time_base : AV_TIME_BASE_Q;
290 if (!link->sample_aspect_ratio.num && !link->sample_aspect_ratio.den)
291 link->sample_aspect_ratio = inlink ?
292 inlink->sample_aspect_ratio : (AVRational){1,1};
295 if (!link->frame_rate.num && !link->frame_rate.den)
296 link->frame_rate = inlink->frame_rate;
301 } else if (!link->w || !link->h) {
302 av_log(link->src, AV_LOG_ERROR,
303 "Video source filters must set their output link's "
304 "width and height\n");
305 return AVERROR(EINVAL);
309 case AVMEDIA_TYPE_AUDIO:
311 if (!link->time_base.num && !link->time_base.den)
312 link->time_base = inlink->time_base;
315 if (!link->time_base.num && !link->time_base.den)
316 link->time_base = (AVRational) {1, link->sample_rate};
319 if ((config_link = link->dstpad->config_props))
320 if ((ret = config_link(link)) < 0) {
321 av_log(link->dst, AV_LOG_ERROR,
322 "Failed to configure input pad on %s\n",
327 if (link->src->nb_inputs && link->src->inputs[0]->hw_frames_ctx &&
328 !link->hw_frames_ctx) {
329 AVHWFramesContext *input_ctx = (AVHWFramesContext*)link->src->inputs[0]->hw_frames_ctx->data;
331 if (input_ctx->format == link->format) {
332 link->hw_frames_ctx = av_buffer_ref(link->src->inputs[0]->hw_frames_ctx);
333 if (!link->hw_frames_ctx)
334 return AVERROR(ENOMEM);
338 link->init_state = AVLINK_INIT;
345 void ff_tlog_link(void *ctx, AVFilterLink *link, int end)
347 if (link->type == AVMEDIA_TYPE_VIDEO) {
349 "link[%p s:%dx%d fmt:%s %s->%s]%s",
350 link, link->w, link->h,
351 av_get_pix_fmt_name(link->format),
352 link->src ? link->src->filter->name : "",
353 link->dst ? link->dst->filter->name : "",
357 av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);
360 "link[%p r:%d cl:%s fmt:%s %s->%s]%s",
361 link, (int)link->sample_rate, buf,
362 av_get_sample_fmt_name(link->format),
363 link->src ? link->src->filter->name : "",
364 link->dst ? link->dst->filter->name : "",
369 int ff_request_frame(AVFilterLink *link)
371 FF_TPRINTF_START(NULL, request_frame); ff_tlog_link(NULL, link, 1);
375 link->frame_wanted_in = 1;
376 link->frame_wanted_out = 1;
380 int ff_request_frame_to_filter(AVFilterLink *link)
384 FF_TPRINTF_START(NULL, request_frame_to_filter); ff_tlog_link(NULL, link, 1);
385 link->frame_wanted_in = 0;
386 if (link->srcpad->request_frame)
387 ret = link->srcpad->request_frame(link);
388 else if (link->src->inputs[0])
389 ret = ff_request_frame(link->src->inputs[0]);
390 if (ret == AVERROR_EOF && link->partial_buf) {
391 AVFrame *pbuf = link->partial_buf;
392 link->partial_buf = NULL;
393 ret = ff_filter_frame_framed(link, pbuf);
394 ff_avfilter_link_set_in_status(link, AVERROR_EOF, AV_NOPTS_VALUE);
395 link->frame_wanted_out = 0;
399 if (ret != AVERROR(EAGAIN) && ret != link->status)
400 ff_avfilter_link_set_in_status(link, ret, AV_NOPTS_VALUE);
405 int ff_poll_frame(AVFilterLink *link)
407 int i, min = INT_MAX;
409 if (link->srcpad->poll_frame)
410 return link->srcpad->poll_frame(link);
412 for (i = 0; i < link->src->nb_inputs; i++) {
414 if (!link->src->inputs[i])
415 return AVERROR(EINVAL);
416 val = ff_poll_frame(link->src->inputs[i]);
417 min = FFMIN(min, val);
423 static const char *const var_names[] = {
441 static int set_enable_expr(AVFilterContext *ctx, const char *expr)
445 AVExpr *old = ctx->enable;
447 if (!(ctx->filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE)) {
448 av_log(ctx, AV_LOG_ERROR, "Timeline ('enable' option) not supported "
449 "with filter '%s'\n", ctx->filter->name);
450 return AVERROR_PATCHWELCOME;
453 expr_dup = av_strdup(expr);
455 return AVERROR(ENOMEM);
457 if (!ctx->var_values) {
458 ctx->var_values = av_calloc(VAR_VARS_NB, sizeof(*ctx->var_values));
459 if (!ctx->var_values) {
461 return AVERROR(ENOMEM);
465 ret = av_expr_parse((AVExpr**)&ctx->enable, expr_dup, var_names,
466 NULL, NULL, NULL, NULL, 0, ctx->priv);
468 av_log(ctx->priv, AV_LOG_ERROR,
469 "Error when evaluating the expression '%s' for enable\n",
476 av_free(ctx->enable_str);
477 ctx->enable_str = expr_dup;
481 void ff_update_link_current_pts(AVFilterLink *link, int64_t pts)
483 if (pts == AV_NOPTS_VALUE)
485 link->current_pts = pts;
486 link->current_pts_us = av_rescale_q(pts, link->time_base, AV_TIME_BASE_Q);
487 /* TODO use duration */
488 if (link->graph && link->age_index >= 0)
489 ff_avfilter_graph_update_heap(link->graph, link);
492 int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags)
494 if(!strcmp(cmd, "ping")){
495 char local_res[256] = {0};
499 res_len = sizeof(local_res);
501 av_strlcatf(res, res_len, "pong from:%s %s\n", filter->filter->name, filter->name);
502 if (res == local_res)
503 av_log(filter, AV_LOG_INFO, "%s", res);
505 }else if(!strcmp(cmd, "enable")) {
506 return set_enable_expr(filter, arg);
507 }else if(filter->filter->process_command) {
508 return filter->filter->process_command(filter, cmd, arg, res, res_len, flags);
510 return AVERROR(ENOSYS);
513 static AVFilter *first_filter;
514 static AVFilter **last_filter = &first_filter;
516 #if !FF_API_NOCONST_GET_NAME
519 AVFilter *avfilter_get_by_name(const char *name)
521 const AVFilter *f = NULL;
526 while ((f = avfilter_next(f)))
527 if (!strcmp(f->name, name))
528 return (AVFilter *)f;
533 int avfilter_register(AVFilter *filter)
535 AVFilter **f = last_filter;
537 /* the filter must select generic or internal exclusively */
538 av_assert0((filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE) != AVFILTER_FLAG_SUPPORT_TIMELINE);
542 while(*f || avpriv_atomic_ptr_cas((void * volatile *)f, NULL, filter))
544 last_filter = &filter->next;
549 const AVFilter *avfilter_next(const AVFilter *prev)
551 return prev ? prev->next : first_filter;
554 #if FF_API_OLD_FILTER_REGISTER
555 AVFilter **av_filter_next(AVFilter **filter)
557 return filter ? &(*filter)->next : &first_filter;
560 void avfilter_uninit(void)
565 int avfilter_pad_count(const AVFilterPad *pads)
572 for (count = 0; pads->name; count++)
577 static const char *default_filter_name(void *filter_ctx)
579 AVFilterContext *ctx = filter_ctx;
580 return ctx->name ? ctx->name : ctx->filter->name;
583 static void *filter_child_next(void *obj, void *prev)
585 AVFilterContext *ctx = obj;
586 if (!prev && ctx->filter && ctx->filter->priv_class && ctx->priv)
591 static const AVClass *filter_child_class_next(const AVClass *prev)
593 const AVFilter *f = NULL;
595 /* find the filter that corresponds to prev */
596 while (prev && (f = avfilter_next(f)))
597 if (f->priv_class == prev)
600 /* could not find filter corresponding to prev */
604 /* find next filter with specific options */
605 while ((f = avfilter_next(f)))
607 return f->priv_class;
612 #define OFFSET(x) offsetof(AVFilterContext, x)
613 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM
614 static const AVOption avfilter_options[] = {
615 { "thread_type", "Allowed thread types", OFFSET(thread_type), AV_OPT_TYPE_FLAGS,
616 { .i64 = AVFILTER_THREAD_SLICE }, 0, INT_MAX, FLAGS, "thread_type" },
617 { "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .unit = "thread_type" },
618 { "enable", "set enable expression", OFFSET(enable_str), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
622 static const AVClass avfilter_class = {
623 .class_name = "AVFilter",
624 .item_name = default_filter_name,
625 .version = LIBAVUTIL_VERSION_INT,
626 .category = AV_CLASS_CATEGORY_FILTER,
627 .child_next = filter_child_next,
628 .child_class_next = filter_child_class_next,
629 .option = avfilter_options,
632 static int default_execute(AVFilterContext *ctx, avfilter_action_func *func, void *arg,
633 int *ret, int nb_jobs)
637 for (i = 0; i < nb_jobs; i++) {
638 int r = func(ctx, arg, i, nb_jobs);
645 AVFilterContext *ff_filter_alloc(const AVFilter *filter, const char *inst_name)
647 AVFilterContext *ret;
652 ret = av_mallocz(sizeof(AVFilterContext));
656 ret->av_class = &avfilter_class;
657 ret->filter = filter;
658 ret->name = inst_name ? av_strdup(inst_name) : NULL;
659 if (filter->priv_size) {
660 ret->priv = av_mallocz(filter->priv_size);
665 av_opt_set_defaults(ret);
666 if (filter->priv_class) {
667 *(const AVClass**)ret->priv = filter->priv_class;
668 av_opt_set_defaults(ret->priv);
671 ret->internal = av_mallocz(sizeof(*ret->internal));
674 ret->internal->execute = default_execute;
676 ret->nb_inputs = avfilter_pad_count(filter->inputs);
677 if (ret->nb_inputs ) {
678 ret->input_pads = av_malloc_array(ret->nb_inputs, sizeof(AVFilterPad));
679 if (!ret->input_pads)
681 memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->nb_inputs);
682 ret->inputs = av_mallocz_array(ret->nb_inputs, sizeof(AVFilterLink*));
687 ret->nb_outputs = avfilter_pad_count(filter->outputs);
688 if (ret->nb_outputs) {
689 ret->output_pads = av_malloc_array(ret->nb_outputs, sizeof(AVFilterPad));
690 if (!ret->output_pads)
692 memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->nb_outputs);
693 ret->outputs = av_mallocz_array(ret->nb_outputs, sizeof(AVFilterLink*));
701 av_freep(&ret->inputs);
702 av_freep(&ret->input_pads);
704 av_freep(&ret->outputs);
705 av_freep(&ret->output_pads);
707 av_freep(&ret->priv);
708 av_freep(&ret->internal);
713 #if FF_API_AVFILTER_OPEN
714 int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
716 *filter_ctx = ff_filter_alloc(filter, inst_name);
717 return *filter_ctx ? 0 : AVERROR(ENOMEM);
721 static void free_link(AVFilterLink *link)
727 link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
729 link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
731 av_buffer_unref(&link->hw_frames_ctx);
733 ff_formats_unref(&link->in_formats);
734 ff_formats_unref(&link->out_formats);
735 ff_formats_unref(&link->in_samplerates);
736 ff_formats_unref(&link->out_samplerates);
737 ff_channel_layouts_unref(&link->in_channel_layouts);
738 ff_channel_layouts_unref(&link->out_channel_layouts);
739 avfilter_link_free(&link);
742 void avfilter_free(AVFilterContext *filter)
750 ff_filter_graph_remove_filter(filter->graph, filter);
752 if (filter->filter->uninit)
753 filter->filter->uninit(filter);
755 for (i = 0; i < filter->nb_inputs; i++) {
756 free_link(filter->inputs[i]);
758 for (i = 0; i < filter->nb_outputs; i++) {
759 free_link(filter->outputs[i]);
762 if (filter->filter->priv_class)
763 av_opt_free(filter->priv);
765 av_buffer_unref(&filter->hw_device_ctx);
767 av_freep(&filter->name);
768 av_freep(&filter->input_pads);
769 av_freep(&filter->output_pads);
770 av_freep(&filter->inputs);
771 av_freep(&filter->outputs);
772 av_freep(&filter->priv);
773 while(filter->command_queue){
774 ff_command_queue_pop(filter);
777 av_expr_free(filter->enable);
778 filter->enable = NULL;
779 av_freep(&filter->var_values);
780 av_freep(&filter->internal);
784 static int process_options(AVFilterContext *ctx, AVDictionary **options,
787 const AVOption *o = NULL;
789 char *av_uninit(parsed_key), *av_uninit(value);
797 const char *shorthand = NULL;
799 o = av_opt_next(ctx->priv, o);
801 if (o->type == AV_OPT_TYPE_CONST || o->offset == offset)
807 ret = av_opt_get_key_value(&args, "=", ":",
808 shorthand ? AV_OPT_FLAG_IMPLICIT_KEY : 0,
809 &parsed_key, &value);
811 if (ret == AVERROR(EINVAL))
812 av_log(ctx, AV_LOG_ERROR, "No option name near '%s'\n", args);
814 av_log(ctx, AV_LOG_ERROR, "Unable to parse '%s': %s\n", args,
822 while ((o = av_opt_next(ctx->priv, o))); /* discard all remaining shorthand */
827 av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value);
829 if (av_opt_find(ctx, key, NULL, 0, 0)) {
830 ret = av_opt_set(ctx, key, value, 0);
837 av_dict_set(options, key, value, 0);
838 if ((ret = av_opt_set(ctx->priv, key, value, 0)) < 0) {
839 if (!av_opt_find(ctx->priv, key, NULL, 0, AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ)) {
840 if (ret == AVERROR_OPTION_NOT_FOUND)
841 av_log(ctx, AV_LOG_ERROR, "Option '%s' not found\n", key);
854 if (ctx->enable_str) {
855 ret = set_enable_expr(ctx, ctx->enable_str);
862 #if FF_API_AVFILTER_INIT_FILTER
863 int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
865 return avfilter_init_str(filter, args);
869 int avfilter_init_dict(AVFilterContext *ctx, AVDictionary **options)
873 ret = av_opt_set_dict(ctx, options);
875 av_log(ctx, AV_LOG_ERROR, "Error applying generic filter options.\n");
879 if (ctx->filter->flags & AVFILTER_FLAG_SLICE_THREADS &&
880 ctx->thread_type & ctx->graph->thread_type & AVFILTER_THREAD_SLICE &&
881 ctx->graph->internal->thread_execute) {
882 ctx->thread_type = AVFILTER_THREAD_SLICE;
883 ctx->internal->execute = ctx->graph->internal->thread_execute;
885 ctx->thread_type = 0;
888 if (ctx->filter->priv_class) {
889 ret = av_opt_set_dict(ctx->priv, options);
891 av_log(ctx, AV_LOG_ERROR, "Error applying options to the filter.\n");
896 if (ctx->filter->init_opaque)
897 ret = ctx->filter->init_opaque(ctx, NULL);
898 else if (ctx->filter->init)
899 ret = ctx->filter->init(ctx);
900 else if (ctx->filter->init_dict)
901 ret = ctx->filter->init_dict(ctx, options);
906 int avfilter_init_str(AVFilterContext *filter, const char *args)
908 AVDictionary *options = NULL;
909 AVDictionaryEntry *e;
913 if (!filter->filter->priv_class) {
914 av_log(filter, AV_LOG_ERROR, "This filter does not take any "
915 "options, but options were provided: %s.\n", args);
916 return AVERROR(EINVAL);
919 #if FF_API_OLD_FILTER_OPTS || FF_API_OLD_FILTER_OPTS_ERROR
920 if ( !strcmp(filter->filter->name, "format") ||
921 !strcmp(filter->filter->name, "noformat") ||
922 !strcmp(filter->filter->name, "frei0r") ||
923 !strcmp(filter->filter->name, "frei0r_src") ||
924 !strcmp(filter->filter->name, "ocv") ||
925 !strcmp(filter->filter->name, "pan") ||
926 !strcmp(filter->filter->name, "pp") ||
927 !strcmp(filter->filter->name, "aevalsrc")) {
928 /* a hack for compatibility with the old syntax
929 * replace colons with |s */
930 char *copy = av_strdup(args);
932 int nb_leading = 0; // number of leading colons to skip
936 ret = AVERROR(ENOMEM);
940 if (!strcmp(filter->filter->name, "frei0r") ||
941 !strcmp(filter->filter->name, "ocv"))
943 else if (!strcmp(filter->filter->name, "frei0r_src"))
946 while (nb_leading--) {
949 p = copy + strlen(copy);
955 deprecated = strchr(p, ':') != NULL;
957 if (!strcmp(filter->filter->name, "aevalsrc")) {
959 while ((p = strchr(p, ':')) && p[1] != ':') {
960 const char *epos = strchr(p + 1, '=');
961 const char *spos = strchr(p + 1, ':');
962 const int next_token_is_opt = epos && (!spos || epos < spos);
963 if (next_token_is_opt) {
967 /* next token does not contain a '=', assume a channel expression */
971 if (p && *p == ':') { // double sep '::' found
973 memmove(p, p + 1, strlen(p));
976 while ((p = strchr(p, ':')))
979 #if FF_API_OLD_FILTER_OPTS
981 av_log(filter, AV_LOG_WARNING, "This syntax is deprecated. Use "
982 "'|' to separate the list items.\n");
984 av_log(filter, AV_LOG_DEBUG, "compat: called with args=[%s]\n", copy);
985 ret = process_options(filter, &options, copy);
988 av_log(filter, AV_LOG_ERROR, "This syntax is deprecated. Use "
989 "'|' to separate the list items ('%s' instead of '%s')\n",
991 ret = AVERROR(EINVAL);
993 ret = process_options(filter, &options, copy);
1003 ret = process_options(filter, &options, args);
1009 ret = avfilter_init_dict(filter, &options);
1013 if ((e = av_dict_get(options, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
1014 av_log(filter, AV_LOG_ERROR, "No such option: %s.\n", e->key);
1015 ret = AVERROR_OPTION_NOT_FOUND;
1020 av_dict_free(&options);
1025 const char *avfilter_pad_get_name(const AVFilterPad *pads, int pad_idx)
1027 return pads[pad_idx].name;
1030 enum AVMediaType avfilter_pad_get_type(const AVFilterPad *pads, int pad_idx)
1032 return pads[pad_idx].type;
1035 static int default_filter_frame(AVFilterLink *link, AVFrame *frame)
1037 return ff_filter_frame(link->dst->outputs[0], frame);
1040 static int ff_filter_frame_framed(AVFilterLink *link, AVFrame *frame)
1042 int (*filter_frame)(AVFilterLink *, AVFrame *);
1043 AVFilterContext *dstctx = link->dst;
1044 AVFilterPad *dst = link->dstpad;
1045 AVFrame *out = NULL;
1047 AVFilterCommand *cmd= link->dst->command_queue;
1051 av_frame_free(&frame);
1052 return link->status;
1055 if (!(filter_frame = dst->filter_frame))
1056 filter_frame = default_filter_frame;
1058 /* copy the frame if needed */
1059 if (dst->needs_writable && !av_frame_is_writable(frame)) {
1060 av_log(link->dst, AV_LOG_DEBUG, "Copying data in avfilter.\n");
1062 switch (link->type) {
1063 case AVMEDIA_TYPE_VIDEO:
1064 out = ff_get_video_buffer(link, link->w, link->h);
1066 case AVMEDIA_TYPE_AUDIO:
1067 out = ff_get_audio_buffer(link, frame->nb_samples);
1070 ret = AVERROR(EINVAL);
1074 ret = AVERROR(ENOMEM);
1078 ret = av_frame_copy_props(out, frame);
1082 switch (link->type) {
1083 case AVMEDIA_TYPE_VIDEO:
1084 av_image_copy(out->data, out->linesize, (const uint8_t **)frame->data, frame->linesize,
1085 frame->format, frame->width, frame->height);
1087 case AVMEDIA_TYPE_AUDIO:
1088 av_samples_copy(out->extended_data, frame->extended_data,
1089 0, 0, frame->nb_samples,
1090 av_get_channel_layout_nb_channels(frame->channel_layout),
1094 ret = AVERROR(EINVAL);
1098 av_frame_free(&frame);
1102 while(cmd && cmd->time <= out->pts * av_q2d(link->time_base)){
1103 av_log(link->dst, AV_LOG_DEBUG,
1104 "Processing command time:%f command:%s arg:%s\n",
1105 cmd->time, cmd->command, cmd->arg);
1106 avfilter_process_command(link->dst, cmd->command, cmd->arg, 0, 0, cmd->flags);
1107 ff_command_queue_pop(link->dst);
1108 cmd= link->dst->command_queue;
1112 if (dstctx->enable_str) {
1113 int64_t pos = av_frame_get_pkt_pos(out);
1114 dstctx->var_values[VAR_N] = link->frame_count;
1115 dstctx->var_values[VAR_T] = pts == AV_NOPTS_VALUE ? NAN : pts * av_q2d(link->time_base);
1116 dstctx->var_values[VAR_W] = link->w;
1117 dstctx->var_values[VAR_H] = link->h;
1118 dstctx->var_values[VAR_POS] = pos == -1 ? NAN : pos;
1120 dstctx->is_disabled = fabs(av_expr_eval(dstctx->enable, dstctx->var_values, NULL)) < 0.5;
1121 if (dstctx->is_disabled &&
1122 (dstctx->filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC))
1123 filter_frame = default_filter_frame;
1125 ret = filter_frame(link, out);
1126 link->frame_count++;
1127 ff_update_link_current_pts(link, pts);
1131 av_frame_free(&out);
1132 av_frame_free(&frame);
1136 static int ff_filter_frame_needs_framing(AVFilterLink *link, AVFrame *frame)
1138 int insamples = frame->nb_samples, inpos = 0, nb_samples;
1139 AVFrame *pbuf = link->partial_buf;
1140 int nb_channels = av_frame_get_channels(frame);
1143 /* Handle framing (min_samples, max_samples) */
1146 AVRational samples_tb = { 1, link->sample_rate };
1147 pbuf = ff_get_audio_buffer(link, link->partial_buf_size);
1149 av_log(link->dst, AV_LOG_WARNING,
1150 "Samples dropped due to memory allocation failure.\n");
1153 av_frame_copy_props(pbuf, frame);
1154 pbuf->pts = frame->pts;
1155 if (pbuf->pts != AV_NOPTS_VALUE)
1156 pbuf->pts += av_rescale_q(inpos, samples_tb, link->time_base);
1157 pbuf->nb_samples = 0;
1159 nb_samples = FFMIN(insamples,
1160 link->partial_buf_size - pbuf->nb_samples);
1161 av_samples_copy(pbuf->extended_data, frame->extended_data,
1162 pbuf->nb_samples, inpos,
1163 nb_samples, nb_channels, link->format);
1164 inpos += nb_samples;
1165 insamples -= nb_samples;
1166 pbuf->nb_samples += nb_samples;
1167 if (pbuf->nb_samples >= link->min_samples) {
1168 ret = ff_filter_frame_framed(link, pbuf);
1171 if (link->frame_wanted_out)
1172 link->frame_wanted_in = 1;
1175 av_frame_free(&frame);
1176 link->partial_buf = pbuf;
1180 int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
1182 FF_TPRINTF_START(NULL, filter_frame); ff_tlog_link(NULL, link, 1); ff_tlog(NULL, " "); ff_tlog_ref(NULL, frame, 1);
1184 /* Consistency checks */
1185 if (link->type == AVMEDIA_TYPE_VIDEO) {
1186 if (strcmp(link->dst->filter->name, "buffersink") &&
1187 strcmp(link->dst->filter->name, "format") &&
1188 strcmp(link->dst->filter->name, "idet") &&
1189 strcmp(link->dst->filter->name, "null") &&
1190 strcmp(link->dst->filter->name, "scale")) {
1191 av_assert1(frame->format == link->format);
1192 av_assert1(frame->width == link->w);
1193 av_assert1(frame->height == link->h);
1196 if (frame->format != link->format) {
1197 av_log(link->dst, AV_LOG_ERROR, "Format change is not supported\n");
1200 if (av_frame_get_channels(frame) != link->channels) {
1201 av_log(link->dst, AV_LOG_ERROR, "Channel count change is not supported\n");
1204 if (frame->channel_layout != link->channel_layout) {
1205 av_log(link->dst, AV_LOG_ERROR, "Channel layout change is not supported\n");
1208 if (frame->sample_rate != link->sample_rate) {
1209 av_log(link->dst, AV_LOG_ERROR, "Sample rate change is not supported\n");
1214 link->frame_wanted_out = 0;
1215 /* Go directly to actual filtering if possible */
1216 if (link->type == AVMEDIA_TYPE_AUDIO &&
1217 link->min_samples &&
1218 (link->partial_buf ||
1219 frame->nb_samples < link->min_samples ||
1220 frame->nb_samples > link->max_samples)) {
1221 return ff_filter_frame_needs_framing(link, frame);
1223 return ff_filter_frame_framed(link, frame);
1226 av_frame_free(&frame);
1227 return AVERROR_PATCHWELCOME;
1230 const AVClass *avfilter_get_class(void)
1232 return &avfilter_class;