void avfilter_default_start_frame(AVFilterLink *link, AVFilterPicRef *picref)
{
- AVFilterLink *out = link->dst->outputs[0];
+ AVFilterLink *out = NULL;
+
+ if(link->dst->output_count)
+ out = link->dst->outputs[0];
link->cur_pic = picref;
void avfilter_default_end_frame(AVFilterLink *link)
{
- AVFilterLink *out = link->dst->outputs[0];
+ AVFilterLink *out = NULL;
+
+ if(link->dst->output_count)
+ out = link->dst->outputs[0];
avfilter_unref_pic(link->cur_pic);
link->cur_pic = NULL;
* the implementation of one input one output video filters */
static int default_config_output_link(AVFilterLink *link)
{
+ if(link->src->input_count && link->src->inputs[0]) {
link->w = link->src->inputs[0]->w;
link->h = link->src->inputs[0]->h;
+ } else {
+ /* XXX: any non-simple filter which would cause this branch to be taken
+ * really should implement its own config_props() for this link. */
+ link->w =
+ link->h = 0;
+ }
return 0;
}
* the implementation of one input one output video filters */
static int *default_query_output_formats(AVFilterLink *link)
{
+ if(link->src->input_count && link->src->inputs[0])
return avfilter_make_format_list(1, link->src->inputs[0]->format);
+ else
+ /* XXX: any non-simple filter which would cause this branch to be taken
+ * really should implement its own query_formats() for this link */
+ return avfilter_make_format_list(0);
}
int avfilter_link(AVFilterContext *src, unsigned srcpad,
AVFilterLink *link;
int *fmts[2], i, j;
- if(src->outputs[srcpad] || dst->inputs[dstpad])
+ if(src->output_count <= srcpad || dst->input_count <= dstpad ||
+ src->outputs[srcpad] || dst->inputs[dstpad])
return -1;
src->outputs[srcpad] =
void avfilter_draw_slice(AVFilterLink *link, uint8_t *data[4], int y, int h)
{
+ if(!link->dst->filter->inputs[link->dstpad].draw_slice)
+ return;
+
link->dst->filter->inputs[link->dstpad].draw_slice(link, data, y, h);
}
ret->av_class->item_name = filter_name;
ret->filter = filter;
ret->name = inst_name ? av_strdup(inst_name) : NULL;
- ret->inputs = av_mallocz(sizeof(AVFilterLink*) * pad_count(filter->inputs));
- ret->outputs = av_mallocz(sizeof(AVFilterLink*) * pad_count(filter->outputs));
ret->priv = av_mallocz(filter->priv_size);
+ ret->input_count = pad_count(filter->inputs);
+ ret->inputs = av_mallocz(sizeof(AVFilterLink*) * ret->input_count);
+ ret->output_count = pad_count(filter->outputs);
+ ret->outputs = av_mallocz(sizeof(AVFilterLink*) * ret->output_count);
+
return ret;
}