3 * Copyright (c) 2007 Bobby Bingham
5 * This file is part of Libav.
7 * Libav 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 * Libav 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 Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/avstring.h"
23 #include "libavutil/channel_layout.h"
24 #include "libavutil/common.h"
25 #include "libavutil/imgutils.h"
26 #include "libavutil/internal.h"
27 #include "libavutil/opt.h"
28 #include "libavutil/pixdesc.h"
29 #include "libavutil/rational.h"
30 #include "libavutil/samplefmt.h"
38 unsigned avfilter_version(void)
40 return LIBAVFILTER_VERSION_INT;
43 const char *avfilter_configuration(void)
45 return LIBAV_CONFIGURATION;
48 const char *avfilter_license(void)
50 #define LICENSE_PREFIX "libavfilter license: "
51 return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1;
54 void ff_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
55 AVFilterPad **pads, AVFilterLink ***links,
60 idx = FFMIN(idx, *count);
62 *pads = av_realloc(*pads, sizeof(AVFilterPad) * (*count + 1));
63 *links = av_realloc(*links, sizeof(AVFilterLink*) * (*count + 1));
64 memmove(*pads + idx + 1, *pads + idx, sizeof(AVFilterPad) * (*count - idx));
65 memmove(*links + idx + 1, *links + idx, sizeof(AVFilterLink*) * (*count - idx));
66 memcpy(*pads + idx, newpad, sizeof(AVFilterPad));
70 for (i = idx + 1; i < *count; i++)
72 (*(unsigned *)((uint8_t *) *links[i] + padidx_off))++;
75 int avfilter_link(AVFilterContext *src, unsigned srcpad,
76 AVFilterContext *dst, unsigned dstpad)
80 if (src->nb_outputs <= srcpad || dst->nb_inputs <= dstpad ||
81 src->outputs[srcpad] || dst->inputs[dstpad])
84 if (src->output_pads[srcpad].type != dst->input_pads[dstpad].type) {
85 av_log(src, AV_LOG_ERROR,
86 "Media type mismatch between the '%s' filter output pad %d and the '%s' filter input pad %d\n",
87 src->name, srcpad, dst->name, dstpad);
88 return AVERROR(EINVAL);
91 link = av_mallocz(sizeof(*link));
93 return AVERROR(ENOMEM);
95 src->outputs[srcpad] = dst->inputs[dstpad] = link;
99 link->srcpad = &src->output_pads[srcpad];
100 link->dstpad = &dst->input_pads[dstpad];
101 link->type = src->output_pads[srcpad].type;
102 assert(AV_PIX_FMT_NONE == -1 && AV_SAMPLE_FMT_NONE == -1);
108 int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
109 unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
112 unsigned dstpad_idx = link->dstpad - link->dst->input_pads;
114 av_log(link->dst, AV_LOG_VERBOSE, "auto-inserting filter '%s' "
115 "between the filter '%s' and the filter '%s'\n",
116 filt->name, link->src->name, link->dst->name);
118 link->dst->inputs[dstpad_idx] = NULL;
119 if ((ret = avfilter_link(filt, filt_dstpad_idx, link->dst, dstpad_idx)) < 0) {
120 /* failed to link output filter to new filter */
121 link->dst->inputs[dstpad_idx] = link;
125 /* re-hookup the link to the new destination filter we inserted */
127 link->dstpad = &filt->input_pads[filt_srcpad_idx];
128 filt->inputs[filt_srcpad_idx] = link;
130 /* if any information on supported media formats already exists on the
131 * link, we need to preserve that */
132 if (link->out_formats)
133 ff_formats_changeref(&link->out_formats,
134 &filt->outputs[filt_dstpad_idx]->out_formats);
135 if (link->out_samplerates)
136 ff_formats_changeref(&link->out_samplerates,
137 &filt->outputs[filt_dstpad_idx]->out_samplerates);
138 if (link->out_channel_layouts)
139 ff_channel_layouts_changeref(&link->out_channel_layouts,
140 &filt->outputs[filt_dstpad_idx]->out_channel_layouts);
145 int avfilter_config_links(AVFilterContext *filter)
147 int (*config_link)(AVFilterLink *);
151 for (i = 0; i < filter->nb_inputs; i ++) {
152 AVFilterLink *link = filter->inputs[i];
156 switch (link->init_state) {
159 case AVLINK_STARTINIT:
160 av_log(filter, AV_LOG_INFO, "circular filter chain detected\n");
163 link->init_state = AVLINK_STARTINIT;
165 if ((ret = avfilter_config_links(link->src)) < 0)
168 if (!(config_link = link->srcpad->config_props)) {
169 if (link->src->nb_inputs != 1) {
170 av_log(link->src, AV_LOG_ERROR, "Source filters and filters "
171 "with more than one input "
172 "must set config_props() "
173 "callbacks on all outputs\n");
174 return AVERROR(EINVAL);
176 } else if ((ret = config_link(link)) < 0) {
177 av_log(link->src, AV_LOG_ERROR,
178 "Failed to configure output pad on %s\n",
183 if (link->time_base.num == 0 && link->time_base.den == 0)
184 link->time_base = link->src && link->src->nb_inputs ?
185 link->src->inputs[0]->time_base : AV_TIME_BASE_Q;
187 if (link->type == AVMEDIA_TYPE_VIDEO) {
188 if (!link->sample_aspect_ratio.num && !link->sample_aspect_ratio.den)
189 link->sample_aspect_ratio = link->src->nb_inputs ?
190 link->src->inputs[0]->sample_aspect_ratio : (AVRational){1,1};
192 if (link->src->nb_inputs) {
194 link->w = link->src->inputs[0]->w;
196 link->h = link->src->inputs[0]->h;
197 } else if (!link->w || !link->h) {
198 av_log(link->src, AV_LOG_ERROR,
199 "Video source filters must set their output link's "
200 "width and height\n");
201 return AVERROR(EINVAL);
205 if ((config_link = link->dstpad->config_props))
206 if ((ret = config_link(link)) < 0) {
207 av_log(link->src, AV_LOG_ERROR,
208 "Failed to configure input pad on %s\n",
213 link->init_state = AVLINK_INIT;
220 void ff_dlog_link(void *ctx, AVFilterLink *link, int end)
222 if (link->type == AVMEDIA_TYPE_VIDEO) {
224 "link[%p s:%dx%d fmt:%-16s %-16s->%-16s]%s",
225 link, link->w, link->h,
226 av_get_pix_fmt_name(link->format),
227 link->src ? link->src->filter->name : "",
228 link->dst ? link->dst->filter->name : "",
232 av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);
235 "link[%p r:%d cl:%s fmt:%-16s %-16s->%-16s]%s",
236 link, link->sample_rate, buf,
237 av_get_sample_fmt_name(link->format),
238 link->src ? link->src->filter->name : "",
239 link->dst ? link->dst->filter->name : "",
244 int ff_request_frame(AVFilterLink *link)
246 FF_DPRINTF_START(NULL, request_frame); ff_dlog_link(NULL, link, 1);
248 if (link->srcpad->request_frame)
249 return link->srcpad->request_frame(link);
250 else if (link->src->inputs[0])
251 return ff_request_frame(link->src->inputs[0]);
255 int ff_poll_frame(AVFilterLink *link)
257 int i, min = INT_MAX;
259 if (link->srcpad->poll_frame)
260 return link->srcpad->poll_frame(link);
262 for (i = 0; i < link->src->nb_inputs; i++) {
264 if (!link->src->inputs[i])
266 val = ff_poll_frame(link->src->inputs[i]);
267 min = FFMIN(min, val);
273 static AVFilter *first_filter;
275 AVFilter *avfilter_get_by_name(const char *name)
282 while ((f = avfilter_next(f)))
283 if (!strcmp(f->name, name))
289 int avfilter_register(AVFilter *filter)
291 AVFilter **f = &first_filter;
299 const AVFilter *avfilter_next(const AVFilter *prev)
301 return prev ? prev->next : first_filter;
304 #if FF_API_OLD_FILTER_REGISTER
305 AVFilter **av_filter_next(AVFilter **filter)
307 return filter ? &(*filter)->next : &first_filter;
310 void avfilter_uninit(void)
315 int avfilter_pad_count(const AVFilterPad *pads)
322 for (count = 0; pads->name; count++)
327 static const char *filter_name(void *p)
329 AVFilterContext *filter = p;
330 return filter->filter->name;
333 static void *filter_child_next(void *obj, void *prev)
335 AVFilterContext *ctx = obj;
336 if (!prev && ctx->filter && ctx->filter->priv_class && ctx->priv)
341 static const AVClass *filter_child_class_next(const AVClass *prev)
345 while (prev && (f = avfilter_next(f)))
346 if (f->priv_class == prev)
349 while ((f = avfilter_next(f)))
351 return f->priv_class;
356 #define OFFSET(x) offsetof(AVFilterContext, x)
357 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM
358 static const AVOption avfilter_options[] = {
359 { "thread_type", "Allowed thread types", OFFSET(thread_type), AV_OPT_TYPE_FLAGS,
360 { .i64 = AVFILTER_THREAD_SLICE }, 0, INT_MAX, FLAGS, "thread_type" },
361 { "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .unit = "thread_type" },
365 static const AVClass avfilter_class = {
366 .class_name = "AVFilter",
367 .item_name = filter_name,
368 .version = LIBAVUTIL_VERSION_INT,
369 .child_next = filter_child_next,
370 .child_class_next = filter_child_class_next,
371 .option = avfilter_options,
374 static int default_execute(AVFilterContext *ctx, avfilter_action_func *func, void *arg,
375 int *ret, int nb_jobs)
379 for (i = 0; i < nb_jobs; i++) {
380 int r = func(ctx, arg, i, nb_jobs);
387 AVFilterContext *ff_filter_alloc(const AVFilter *filter, const char *inst_name)
389 AVFilterContext *ret;
394 ret = av_mallocz(sizeof(AVFilterContext));
398 ret->av_class = &avfilter_class;
399 ret->filter = filter;
400 ret->name = inst_name ? av_strdup(inst_name) : NULL;
401 if (filter->priv_size) {
402 ret->priv = av_mallocz(filter->priv_size);
407 av_opt_set_defaults(ret);
408 if (filter->priv_class) {
409 *(const AVClass**)ret->priv = filter->priv_class;
410 av_opt_set_defaults(ret->priv);
413 ret->internal = av_mallocz(sizeof(*ret->internal));
416 ret->internal->execute = default_execute;
418 ret->nb_inputs = avfilter_pad_count(filter->inputs);
419 if (ret->nb_inputs ) {
420 ret->input_pads = av_malloc(sizeof(AVFilterPad) * ret->nb_inputs);
421 if (!ret->input_pads)
423 memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->nb_inputs);
424 ret->inputs = av_mallocz(sizeof(AVFilterLink*) * ret->nb_inputs);
429 ret->nb_outputs = avfilter_pad_count(filter->outputs);
430 if (ret->nb_outputs) {
431 ret->output_pads = av_malloc(sizeof(AVFilterPad) * ret->nb_outputs);
432 if (!ret->output_pads)
434 memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->nb_outputs);
435 ret->outputs = av_mallocz(sizeof(AVFilterLink*) * ret->nb_outputs);
440 FF_DISABLE_DEPRECATION_WARNINGS
441 ret->output_count = ret->nb_outputs;
442 ret->input_count = ret->nb_inputs;
443 FF_ENABLE_DEPRECATION_WARNINGS
449 av_freep(&ret->inputs);
450 av_freep(&ret->input_pads);
452 av_freep(&ret->outputs);
453 av_freep(&ret->output_pads);
455 av_freep(&ret->priv);
456 av_freep(&ret->internal);
461 #if FF_API_AVFILTER_OPEN
462 int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
464 *filter_ctx = ff_filter_alloc(filter, inst_name);
465 return *filter_ctx ? 0 : AVERROR(ENOMEM);
469 static void free_link(AVFilterLink *link)
475 link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
477 link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
479 ff_formats_unref(&link->in_formats);
480 ff_formats_unref(&link->out_formats);
481 ff_formats_unref(&link->in_samplerates);
482 ff_formats_unref(&link->out_samplerates);
483 ff_channel_layouts_unref(&link->in_channel_layouts);
484 ff_channel_layouts_unref(&link->out_channel_layouts);
488 void avfilter_free(AVFilterContext *filter)
493 ff_filter_graph_remove_filter(filter->graph, filter);
495 if (filter->filter->uninit)
496 filter->filter->uninit(filter);
498 for (i = 0; i < filter->nb_inputs; i++) {
499 free_link(filter->inputs[i]);
501 for (i = 0; i < filter->nb_outputs; i++) {
502 free_link(filter->outputs[i]);
505 if (filter->filter->priv_class)
506 av_opt_free(filter->priv);
508 av_freep(&filter->name);
509 av_freep(&filter->input_pads);
510 av_freep(&filter->output_pads);
511 av_freep(&filter->inputs);
512 av_freep(&filter->outputs);
513 av_freep(&filter->priv);
514 av_freep(&filter->internal);
518 /* process a list of value1:value2:..., each value corresponding
519 * to subsequent AVOption, in the order they are declared */
520 static int process_unnamed_options(AVFilterContext *ctx, AVDictionary **options,
523 const AVOption *o = NULL;
524 const char *p = args;
528 o = av_opt_next(ctx->priv, o);
530 av_log(ctx, AV_LOG_ERROR, "More options provided than "
531 "this filter supports.\n");
532 return AVERROR(EINVAL);
534 if (o->type == AV_OPT_TYPE_CONST)
537 val = av_get_token(&p, ":");
539 return AVERROR(ENOMEM);
541 av_dict_set(options, o->name, val, 0);
551 #if FF_API_AVFILTER_INIT_FILTER
552 int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
554 return avfilter_init_str(filter, args);
558 int avfilter_init_dict(AVFilterContext *ctx, AVDictionary **options)
562 ret = av_opt_set_dict(ctx, options);
564 av_log(ctx, AV_LOG_ERROR, "Error applying generic filter options.\n");
568 if (ctx->filter->flags & AVFILTER_FLAG_SLICE_THREADS &&
569 ctx->thread_type & ctx->graph->thread_type & AVFILTER_THREAD_SLICE &&
570 ctx->graph->internal->thread_execute) {
571 ctx->thread_type = AVFILTER_THREAD_SLICE;
572 ctx->internal->execute = ctx->graph->internal->thread_execute;
574 ctx->thread_type = 0;
577 if (ctx->filter->priv_class) {
578 ret = av_opt_set_dict(ctx->priv, options);
580 av_log(ctx, AV_LOG_ERROR, "Error applying options to the filter.\n");
585 if (ctx->filter->init)
586 ret = ctx->filter->init(ctx);
587 else if (ctx->filter->init_dict)
588 ret = ctx->filter->init_dict(ctx, options);
593 int avfilter_init_str(AVFilterContext *filter, const char *args)
595 AVDictionary *options = NULL;
596 AVDictionaryEntry *e;
600 if (!filter->filter->priv_class) {
601 av_log(filter, AV_LOG_ERROR, "This filter does not take any "
602 "options, but options were provided: %s.\n", args);
603 return AVERROR(EINVAL);
606 #if FF_API_OLD_FILTER_OPTS
607 if (!strcmp(filter->filter->name, "scale") &&
608 strchr(args, ':') && strchr(args, ':') < strchr(args, '=')) {
609 /* old w:h:flags=<flags> syntax */
610 char *copy = av_strdup(args);
613 av_log(filter, AV_LOG_WARNING, "The <w>:<h>:flags=<flags> option "
614 "syntax is deprecated. Use either <w>:<h>:<flags> or "
615 "w=<w>:h=<h>:flags=<flags>.\n");
618 ret = AVERROR(ENOMEM);
622 p = strrchr(copy, ':');
625 ret = av_dict_parse_string(&options, p, "=", ":", 0);
628 ret = process_unnamed_options(filter, &options, copy);
636 if (strchr(args, '=')) {
637 /* assume a list of key1=value1:key2=value2:... */
638 ret = av_dict_parse_string(&options, args, "=", ":", 0);
641 #if FF_API_OLD_FILTER_OPTS
642 } else if (!strcmp(filter->filter->name, "format") ||
643 !strcmp(filter->filter->name, "noformat") ||
644 !strcmp(filter->filter->name, "frei0r") ||
645 !strcmp(filter->filter->name, "frei0r_src") ||
646 !strcmp(filter->filter->name, "ocv")) {
647 /* a hack for compatibility with the old syntax
648 * replace colons with |s */
649 char *copy = av_strdup(args);
651 int nb_leading = 0; // number of leading colons to skip
654 ret = AVERROR(ENOMEM);
658 if (!strcmp(filter->filter->name, "frei0r") ||
659 !strcmp(filter->filter->name, "ocv"))
661 else if (!strcmp(filter->filter->name, "frei0r_src"))
664 while (nb_leading--) {
667 p = copy + strlen(copy);
673 if (strchr(p, ':')) {
674 av_log(filter, AV_LOG_WARNING, "This syntax is deprecated. Use "
675 "'|' to separate the list items.\n");
678 while ((p = strchr(p, ':')))
681 ret = process_unnamed_options(filter, &options, copy);
688 ret = process_unnamed_options(filter, &options, args);
694 ret = avfilter_init_dict(filter, &options);
698 if ((e = av_dict_get(options, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
699 av_log(filter, AV_LOG_ERROR, "No such option: %s.\n", e->key);
700 ret = AVERROR_OPTION_NOT_FOUND;
705 av_dict_free(&options);
710 const char *avfilter_pad_get_name(const AVFilterPad *pads, int pad_idx)
712 return pads[pad_idx].name;
715 enum AVMediaType avfilter_pad_get_type(const AVFilterPad *pads, int pad_idx)
717 return pads[pad_idx].type;
720 static int default_filter_frame(AVFilterLink *link, AVFrame *frame)
722 return ff_filter_frame(link->dst->outputs[0], frame);
725 int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
727 int (*filter_frame)(AVFilterLink *, AVFrame *);
728 AVFilterPad *dst = link->dstpad;
731 FF_DPRINTF_START(NULL, filter_frame);
732 ff_dlog_link(NULL, link, 1);
734 if (!(filter_frame = dst->filter_frame))
735 filter_frame = default_filter_frame;
737 /* copy the frame if needed */
738 if (dst->needs_writable && !av_frame_is_writable(frame)) {
739 av_log(link->dst, AV_LOG_DEBUG, "Copying data in avfilter.\n");
741 switch (link->type) {
742 case AVMEDIA_TYPE_VIDEO:
743 out = ff_get_video_buffer(link, link->w, link->h);
745 case AVMEDIA_TYPE_AUDIO:
746 out = ff_get_audio_buffer(link, frame->nb_samples);
748 default: return AVERROR(EINVAL);
751 av_frame_free(&frame);
752 return AVERROR(ENOMEM);
754 av_frame_copy_props(out, frame);
756 switch (link->type) {
757 case AVMEDIA_TYPE_VIDEO:
758 av_image_copy(out->data, out->linesize, frame->data, frame->linesize,
759 frame->format, frame->width, frame->height);
761 case AVMEDIA_TYPE_AUDIO:
762 av_samples_copy(out->extended_data, frame->extended_data,
763 0, 0, frame->nb_samples,
764 av_get_channel_layout_nb_channels(frame->channel_layout),
767 default: return AVERROR(EINVAL);
770 av_frame_free(&frame);
774 return filter_frame(link, out);
777 const AVClass *avfilter_get_class(void)
779 return &avfilter_class;