[Ffmpeg-devel] [PATCH] simple internal lzo decoder

[Jindrich Makovicka]

Reimar D?ffinger wrote:

[...]

> +    if (back == 1) {
> +        memset(dst, *src, cnt);
> +        dst += cnt;
> +    } else {
> +#ifdef OUTBUF_PADDED
> +        dst[0] = src[0];
> +        dst[1] = src[1];
> +        dst[2] = src[2];
> +        dst[3] = src[3];
> +        src += 4;
> +        dst += 4;
> +        cnt -= 4;
> +        if (cnt > 0) {
> +            dst[0] = src[0];
> +            dst[1] = src[1];
> +            dst[2] = src[2];
> +            dst[3] = src[3];
> +            dst[4] = src[4];
> +            dst[5] = src[5];
> +            dst[6] = src[6];
> +            dst[7] = src[7];
> +            src += 8;
> +            dst += 8;
> +            cnt -= 8;
> +        }
> +#endif
> +        if (cnt > 0) {
> +            int blocklen = back;
> +            while (cnt > blocklen) {
> +                memcpy(dst, src, blocklen);
> +                dst += blocklen;
> +                cnt -= blocklen;
> +                blocklen <<= 1;
> +            }
> +            memcpy(dst, src, cnt);
> +        }
> +        dst += cnt;
> +    }
> +    c->out = dst;
>  }

will this work for 1 < back < 12, back !=4 and cnt > back ?

-- 
Jindrich Makovicka