static int ipvideo_decode_block_opcode_0x5(IpvideoContext *s) { signed char x, y; /* copy a block from the previous frame using an expanded range; * need 2 more bytes */ CHECK_STREAM_PTR(2); x = *s->stream_ptr++; y = *s->stream_ptr++; debug_interplay (" motion bytes = %d, %d\n", x, y); return copy_from(s, &s->last_frame, x, y); }