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;
return 0;
if(!start_frame)
start_frame = avfilter_default_start_frame;
- start_frame(link, picref);
+ /* prepare to copy the picture if it has insufficient permissions */
+ if((link_dpad(link).min_perms & picref->perms) != link_dpad(link).min_perms ||
+ link_dpad(link).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, link_dpad(link).min_perms);
+ link->srcpic = picref;
+ }
+ else
+ link->cur_pic = picref;
+
+ start_frame(link, link->cur_pic);
}
void avfilter_end_frame(AVFilterLink *link)
{
void (*end_frame)(AVFilterLink *);
+ /* 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;
+ }
+
end_frame = link_dpad(link).end_frame;
if(!end_frame)
end_frame = avfilter_default_end_frame;
void avfilter_draw_slice(AVFilterLink *link, int y, int h)
{
+ uint8_t *src[4], *dst[4];
+ int i, j, hsub, vsub;
+
+ /* copy the slice if needed for permission reasons */
+ if(link->srcpic) {
+ avcodec_get_chroma_sub_sample(link->format, &hsub, &vsub);
+
+ src[0] = link->srcpic-> data[0] + y * link->srcpic-> linesize[0];
+ dst[0] = link->cur_pic->data[0] + y * link->cur_pic->linesize[0];
+ for(i = 1; i < 4; i ++) {
+ if(link->srcpic->data[i]) {
+ src[i] = link->srcpic-> data[i] + (y >> vsub) * link->srcpic-> linesize[i];
+ dst[i] = link->cur_pic->data[i] + (y >> vsub) * link->cur_pic->linesize[i];
+ } else
+ src[i] = dst[i] = NULL;
+ }
+ for(j = 0; j < h; j ++) {
+ memcpy(dst[0], src[0], link->cur_pic->linesize[0]);
+ src[0] += link->srcpic ->linesize[0];
+ dst[0] += link->cur_pic->linesize[0];
+ }
+ for(i = 1; i < 4; i ++) {
+ if(!src[i]) continue;
+
+ for(j = 0; j < h >> vsub; j ++) {
+ memcpy(dst[i], src[i], link->cur_pic->linesize[i]);
+ src[i] += link->srcpic ->linesize[i];
+ dst[i] += link->cur_pic->linesize[i];
+ }
+ }
+ }
+
if(!link_dpad(link).draw_slice)
return;