/*
- * Filter layer
+ * filter layer
* copyright (c) 2007 Bobby Bingham
*
* This file is part of FFmpeg.
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#include <stdarg.h>
-#include <stdlib.h>
-#include <string.h>
-#include <stdio.h>
-
+#include "libavcodec/imgconvert.h"
#include "avfilter.h"
-#include "allfilters.h"
-/** list of registered filters, sorted by name */
-static int filter_count = 0;
-static AVFilter **filters = NULL;
+unsigned avfilter_version(void) {
+ return LIBAVFILTER_VERSION_INT;
+}
+
+/** list of registered filters */
+struct FilterList
+{
+ AVFilter *filter;
+ struct FilterList *next;
+} *filters = NULL;
+
+/** helper macros to get the in/out pad on the dst/src filter */
+#define link_dpad(link) link->dst-> input_pads[link->dstpad]
+#define link_spad(link) link->src->output_pads[link->srcpad]
AVFilterPicRef *avfilter_ref_pic(AVFilterPicRef *ref, int pmask)
{
AVFilterPicRef *ret = av_malloc(sizeof(AVFilterPicRef));
- memcpy(ret, ref, sizeof(AVFilterPicRef));
+ *ret = *ref;
ret->perms &= pmask;
ret->pic->refcount ++;
return ret;
void avfilter_unref_pic(AVFilterPicRef *ref)
{
- if(-- ref->pic->refcount == 0)
+ if(!(--ref->pic->refcount))
ref->pic->free(ref->pic);
av_free(ref);
}
+void avfilter_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
+ AVFilterPad **pads, AVFilterLink ***links,
+ AVFilterPad *newpad)
+{
+ unsigned i;
+
+ idx = FFMIN(idx, *count);
+
+ *pads = av_realloc(*pads, sizeof(AVFilterPad) * (*count + 1));
+ *links = av_realloc(*links, sizeof(AVFilterLink*) * (*count + 1));
+ memmove(*pads +idx+1, *pads +idx, sizeof(AVFilterPad) * (*count-idx));
+ memmove(*links+idx+1, *links+idx, sizeof(AVFilterLink*) * (*count-idx));
+ memcpy(*pads+idx, newpad, sizeof(AVFilterPad));
+ (*links)[idx] = NULL;
+
+ (*count) ++;
+ for(i = idx+1; i < *count; i ++)
+ if(*links[i])
+ (*(unsigned *)((uint8_t *) *links[i] + padidx_off)) ++;
+}
+
int avfilter_link(AVFilterContext *src, unsigned srcpad,
AVFilterContext *dst, unsigned dstpad)
{
return -1;
src->outputs[srcpad] =
- dst->inputs[dstpad] = link = av_malloc(sizeof(AVFilterLink));
+ dst-> inputs[dstpad] = link = av_mallocz(sizeof(AVFilterLink));
link->src = src;
link->dst = dst;
link->srcpad = srcpad;
link->dstpad = dstpad;
- link->cur_pic = NULL;
- link->format = -1;
+ link->format = PIX_FMT_NONE;
return 0;
}
-int avfilter_config_link(AVFilterLink *link)
+int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
+ unsigned in, unsigned out)
+{
+ av_log(link->dst, AV_LOG_INFO, "auto-inserting filter '%s'\n",
+ filt->filter->name);
+
+ link->dst->inputs[link->dstpad] = NULL;
+ if(avfilter_link(filt, out, link->dst, link->dstpad)) {
+ /* failed to link output filter to new filter */
+ link->dst->inputs[link->dstpad] = link;
+ return -1;
+ }
+
+ /* re-hookup the link to the new destination filter we inserted */
+ link->dst = filt;
+ link->dstpad = in;
+ filt->inputs[in] = link;
+
+ /* if any information on supported colorspaces already exists on the
+ * link, we need to preserve that */
+ if(link->out_formats)
+ avfilter_formats_changeref(&link->out_formats,
+ &filt->outputs[out]->out_formats);
+
+ return 0;
+}
+
+int avfilter_config_links(AVFilterContext *filter)
{
- int *fmts[2], i, j;
int (*config_link)(AVFilterLink *);
+ unsigned i;
- if(!link)
- return 0;
+ for(i = 0; i < filter->input_count; i ++) {
+ AVFilterLink *link = filter->inputs[i];
- /* find a format both filters support - TODO: auto-insert conversion filter */
- link->format = -1;
- if(link->src->output_pads[link->srcpad].query_formats)
- fmts[0] = link->src->output_pads[link->srcpad].query_formats(link);
- else
- fmts[0] = avfilter_default_query_output_formats(link);
- fmts[1] = link->dst->input_pads[link->dstpad].query_formats(link);
- for(i = 0; fmts[0][i] != -1; i ++)
- for(j = 0; fmts[1][j] != -1; j ++)
- if(fmts[0][i] == fmts[1][j]) {
- link->format = fmts[0][i];
- goto format_done;
- }
+ if(!link) continue;
-format_done:
- av_free(fmts[0]);
- av_free(fmts[1]);
- if(link->format == -1)
- return -1;
+ switch(link->init_state) {
+ case AVLINK_INIT:
+ continue;
+ case AVLINK_STARTINIT:
+ av_log(filter, AV_LOG_INFO, "circular filter chain detected\n");
+ return 0;
+ case AVLINK_UNINIT:
+ link->init_state = AVLINK_STARTINIT;
- if(!(config_link = link->src->output_pads[link->srcpad].config_props))
- config_link = avfilter_default_config_output_link;
- if(config_link(link))
- return -1;
+ if(avfilter_config_links(link->src))
+ return -1;
- if(!(config_link = link->dst->input_pads[link->dstpad].config_props))
- config_link = avfilter_default_config_input_link;
- if(config_link(link))
- return -1;
+ if(!(config_link = link_spad(link).config_props))
+ config_link = avfilter_default_config_output_link;
+ if(config_link(link))
+ return -1;
+
+ if((config_link = link_dpad(link).config_props))
+ if(config_link(link))
+ return -1;
+
+ link->init_state = AVLINK_INIT;
+ }
+ }
return 0;
}
{
AVFilterPicRef *ret = NULL;
- if(link->dst->input_pads[link->dstpad].get_video_buffer)
- ret = link->dst->input_pads[link->dstpad].get_video_buffer(link, perms);
+ if(link_dpad(link).get_video_buffer)
+ ret = link_dpad(link).get_video_buffer(link, perms);
if(!ret)
ret = avfilter_default_get_video_buffer(link, perms);
return ret;
}
-void avfilter_request_frame(AVFilterLink *link)
+int avfilter_request_frame(AVFilterLink *link)
{
- const AVFilterPad *pad = &link->src->output_pads[link->srcpad];
-
- if(pad->request_frame)
- pad->request_frame(link);
+ if(link_spad(link).request_frame)
+ return link_spad(link).request_frame(link);
else if(link->src->inputs[0])
- avfilter_request_frame(link->src->inputs[0]);
+ return avfilter_request_frame(link->src->inputs[0]);
+ else return -1;
+}
+
+int avfilter_poll_frame(AVFilterLink *link)
+{
+ int i, min=INT_MAX;
+
+ if(link_spad(link).poll_frame)
+ return link_spad(link).poll_frame(link);
+
+ for (i=0; i<link->src->input_count; i++) {
+ if(!link->src->inputs[i])
+ return -1;
+ min = FFMIN(min, avfilter_poll_frame(link->src->inputs[i]));
+ }
+
+ return min;
}
/* XXX: should we do the duplicating of the picture ref here, instead of
void avfilter_start_frame(AVFilterLink *link, AVFilterPicRef *picref)
{
void (*start_frame)(AVFilterLink *, AVFilterPicRef *);
+ AVFilterPad *dst = &link_dpad(link);
- start_frame = link->dst->input_pads[link->dstpad].start_frame;
- if(!start_frame)
+ if(!(start_frame = dst->start_frame))
start_frame = avfilter_default_start_frame;
- start_frame(link, picref);
+ /* prepare to copy the picture if it has insufficient permissions */
+ if((dst->min_perms & picref->perms) != dst->min_perms ||
+ dst->rej_perms & picref->perms) {
+ /*
+ av_log(link->dst, AV_LOG_INFO,
+ "frame copy needed (have perms %x, need %x, reject %x)\n",
+ picref->perms,
+ link_dpad(link).min_perms, link_dpad(link).rej_perms);
+ */
+
+ link->cur_pic = avfilter_default_get_video_buffer(link, dst->min_perms);
+ link->srcpic = picref;
+ link->cur_pic->pts = link->srcpic->pts;
+ }
+ else
+ link->cur_pic = picref;
+
+ start_frame(link, link->cur_pic);
}
void avfilter_end_frame(AVFilterLink *link)
{
void (*end_frame)(AVFilterLink *);
- end_frame = link->dst->input_pads[link->dstpad].end_frame;
- if(!end_frame)
+ if(!(end_frame = link_dpad(link).end_frame))
end_frame = avfilter_default_end_frame;
end_frame(link);
-}
-void avfilter_draw_slice(AVFilterLink *link, uint8_t *data[4], int y, int h)
-{
- if(!link->dst->input_pads[link->dstpad].draw_slice)
- return;
+ /* unreference the source picture if we're feeding the destination filter
+ * a copied version dues to permission issues */
+ if(link->srcpic) {
+ avfilter_unref_pic(link->srcpic);
+ link->srcpic = NULL;
+ }
- link->dst->input_pads[link->dstpad].draw_slice(link, data, y, h);
}
-static int filter_cmp(const void *aa, const void *bb)
+void avfilter_draw_slice(AVFilterLink *link, int y, int h)
{
- const AVFilter *a = *(const AVFilter **)aa, *b = *(const AVFilter **)bb;
- return strcmp(a->name, b->name);
+ uint8_t *src[4], *dst[4];
+ int i, j, hsub, vsub;
+ void (*draw_slice)(AVFilterLink *, int, int);
+
+ /* copy the slice if needed for permission reasons */
+ if(link->srcpic) {
+ avcodec_get_chroma_sub_sample(link->format, &hsub, &vsub);
+
+ for(i = 0; i < 4; i ++) {
+ if(link->srcpic->data[i]) {
+ src[i] = link->srcpic-> data[i] +
+ (y >> (i==0 ? 0 : vsub)) * link->srcpic-> linesize[i];
+ dst[i] = link->cur_pic->data[i] +
+ (y >> (i==0 ? 0 : vsub)) * link->cur_pic->linesize[i];
+ } else
+ src[i] = dst[i] = NULL;
+ }
+
+ for(i = 0; i < 4; i ++) {
+ int planew =
+ ff_get_plane_bytewidth(link->format, link->cur_pic->w, i);
+
+ if(!src[i]) continue;
+
+ for(j = 0; j < h >> (i==0 ? 0 : vsub); j ++) {
+ memcpy(dst[i], src[i], planew);
+ src[i] += link->srcpic ->linesize[i];
+ dst[i] += link->cur_pic->linesize[i];
+ }
+ }
+ }
+
+ if(!(draw_slice = link_dpad(link).draw_slice))
+ draw_slice = avfilter_default_draw_slice;
+ draw_slice(link, y, h);
}
-AVFilter *avfilter_get_by_name(char *name)
+AVFilter *avfilter_get_by_name(const char *name)
{
- AVFilter key = { .name = name, };
- AVFilter *key2 = &key;
- AVFilter **ret;
+ struct FilterList *filt;
+
+ for(filt = filters; filt; filt = filt->next)
+ if(!strcmp(filt->filter->name, name))
+ return filt->filter;
- ret = bsearch(&key2, filters, filter_count, sizeof(AVFilter **), filter_cmp);
- if(ret)
- return *ret;
return NULL;
}
-/* FIXME: insert in order, rather than insert at end + resort */
void avfilter_register(AVFilter *filter)
{
- filters = av_realloc(filters, sizeof(AVFilter*) * (filter_count+1));
- filters[filter_count] = filter;
- qsort(filters, ++filter_count, sizeof(AVFilter **), filter_cmp);
-}
+ struct FilterList *newfilt = av_malloc(sizeof(struct FilterList));
-void avfilter_init(void)
-{
- avfilter_register(&vsrc_dummy);
- avfilter_register(&vsrc_ppm);
- avfilter_register(&vf_crop);
- avfilter_register(&vf_graph);
- avfilter_register(&vf_passthrough);
- avfilter_register(&vf_rgb2bgr);
- avfilter_register(&vf_slicify);
- avfilter_register(&vo_sdl);
+ newfilt->filter = filter;
+ newfilt->next = filters;
+ filters = newfilt;
}
void avfilter_uninit(void)
{
- av_freep(&filters);
- filter_count = 0;
+ struct FilterList *tmp;
+
+ for(; filters; filters = tmp) {
+ tmp = filters->next;
+ av_free(filters);
+ }
}
static int pad_count(const AVFilterPad *pads)
{
- AVFilterPad *p = (AVFilterPad *) pads;
int count;
- for(count = 0; p->name; count ++) p ++;
+ for(count = 0; pads->name; count ++) pads ++;
return count;
}
return filter->filter->name;
}
-AVFilterContext *avfilter_create(AVFilter *filter, char *inst_name)
+static const AVClass avfilter_class = {
+ "AVFilter",
+ filter_name
+};
+
+AVFilterContext *avfilter_open(AVFilter *filter, const char *inst_name)
{
- AVFilterContext *ret = av_malloc(sizeof(AVFilterContext));
+ AVFilterContext *ret;
+
+ if (!filter)
+ return 0;
+
+ ret = av_mallocz(sizeof(AVFilterContext));
- ret->av_class = av_mallocz(sizeof(AVClass));
- ret->av_class->item_name = filter_name;
+ ret->av_class = &avfilter_class;
ret->filter = filter;
ret->name = inst_name ? av_strdup(inst_name) : NULL;
ret->priv = av_mallocz(filter->priv_size);
ret->input_count = pad_count(filter->inputs);
- ret->input_pads = av_malloc(sizeof(AVFilterPad) * ret->input_count);
- memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad)*ret->input_count);
- ret->inputs = av_mallocz(sizeof(AVFilterLink*) * ret->input_count);
+ if (ret->input_count) {
+ ret->input_pads = av_malloc(sizeof(AVFilterPad) * ret->input_count);
+ memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->input_count);
+ ret->inputs = av_mallocz(sizeof(AVFilterLink*) * ret->input_count);
+ }
ret->output_count = pad_count(filter->outputs);
- ret->output_pads = av_malloc(sizeof(AVFilterPad) * ret->output_count);
- memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad)*ret->output_count);
- ret->outputs = av_mallocz(sizeof(AVFilterLink*) * ret->output_count);
+ if (ret->output_count) {
+ ret->output_pads = av_malloc(sizeof(AVFilterPad) * ret->output_count);
+ memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->output_count);
+ ret->outputs = av_mallocz(sizeof(AVFilterLink*) * ret->output_count);
+ }
return ret;
}
for(i = 0; i < filter->input_count; i ++) {
if(filter->inputs[i])
filter->inputs[i]->src->outputs[filter->inputs[i]->srcpad] = NULL;
- av_free(filter->inputs[i]);
+ av_freep(&filter->inputs[i]);
}
for(i = 0; i < filter->output_count; i ++) {
if(filter->outputs[i])
filter->outputs[i]->dst->inputs[filter->outputs[i]->dstpad] = NULL;
- av_free(filter->outputs[i]);
+ av_freep(&filter->outputs[i]);
}
- av_free(filter->name);
- av_free(filter->input_pads);
- av_free(filter->output_pads);
- av_free(filter->inputs);
- av_free(filter->outputs);
- av_free(filter->priv);
- av_free(filter->av_class);
+ av_freep(&filter->name);
+ av_freep(&filter->input_pads);
+ av_freep(&filter->output_pads);
+ av_freep(&filter->inputs);
+ av_freep(&filter->outputs);
+ av_freep(&filter->priv);
av_free(filter);
}
-AVFilterContext *avfilter_create_by_name(char *name, char *inst_name)
-{
- AVFilter *filt;
-
- if(!(filt = avfilter_get_by_name(name))) return NULL;
- return avfilter_create(filt, inst_name);
-}
-
int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
{
- int ret;
+ int ret=0;
if(filter->filter->init)
- if((ret = filter->filter->init(filter, args, opaque))) return ret;
- return 0;
-}
-
-int *avfilter_make_format_list(int len, ...)
-{
- int *ret, i;
- va_list vl;
-
- ret = av_malloc(sizeof(int) * (len + 1));
- va_start(vl, len);
- for(i = 0; i < len; i ++)
- ret[i] = va_arg(vl, int);
- va_end(vl);
- ret[len] = -1;
-
+ ret = filter->filter->init(filter, args, opaque);
return ret;
}
projects / ffmpeg / blobdiff