/* TODO: set the buffer's priv member to a context structure for the whole
* filter chain. This will allow for a buffer pool instead of the constant
* alloc & free cycle currently implemented. */
AVFilterPicRef *avfilter_default_get_video_buffer(AVFilterLink *link, int perms)
{
AVFilterPic *pic = av_mallocz(sizeof(AVFilterPic));
AVFilterPicRef *ref = av_mallocz(sizeof(AVFilterPicRef));
int i, tempsize;
char *buf;
ref->pic = pic;
ref->w = link->w;
ref->h = link->h;
/* make sure the buffer gets read permission or it's useless for output */
ref->perms = perms | AV_PERM_READ;
pic->refcount = 1;
pic->format = link->v_format;
pic->free = avfilter_default_free_video_buffer;
ff_fill_linesize((AVPicture *)pic, pic->format, ref->w);
for (i=0; i<4;i++)
pic->linesize[i] = FFALIGN(pic->linesize[i], 16);
tempsize = ff_fill_pointer((AVPicture *)pic, NULL, pic->format, ref->h);
buf = av_malloc(tempsize);
ff_fill_pointer((AVPicture *)pic, buf, pic->format, ref->h);
memcpy(ref->data, pic->data, sizeof(pic->data));
memcpy(ref->linesize, pic->linesize, sizeof(pic->linesize));
return ref;
}
static inline void get_buffer(AVFrame *p, int width, int height)
{
ff_fill_linesize(p, width);
for(int plane=0;plane<3;plane++) {
p->data[plane] = (uint8_t *) av_malloc(p->linesize[plane]*height);
}
}
