- if (s->prev_frame->data[0]) {
- ret = av_frame_copy(frame, s->prev_frame);
- if (ret < 0)
- return ret;
- } else {
- ptrdiff_t linesize[4] = { frame->linesize[0], 0, 0, 0 };
- av_image_fill_black(frame->data, linesize, avctx->pix_fmt, 0,
- avctx->width, avctx->height);
- }
-
- blocks = bytestream2_get_le16(&gb);