func: static int decode_copy(uint8_t *frame, int width, int height,
  
                         const uint8_t *src, const uint8_t *src_end)
  
  {
  
      const int size = width * height;
  
  
  
      if (src_end - src < size)
  
          return -1;
  
      bytestream_get_buffer(&src, frame, size);
  
      return 0;
  
  }
  