Function ff_snow_alloc_blocks

libavcodec/snow.c:164–177

}

int ff_snow_alloc_blocks(SnowContext *s){
    int w= AV_CEIL_RSHIFT(s->avctx->width,  LOG2_MB_SIZE);
    int h= AV_CEIL_RSHIFT(s->avctx->height, LOG2_MB_SIZE);

    s->b_width = w;
    s->b_height= h;

    av_free(s->block);
    s->block = av_calloc(w * h,  sizeof(*s->block) << (s->block_max_depth*2));
    if (!s->block)
        return AVERROR(ENOMEM);

    return 0;
}

static void mc_block(Plane *p, uint8_t *dst, const uint8_t *src, int stride, int b_w, int b_h, int dx, int dy){
    static const uint8_t weight[64]={