[FFmpeg-devel] [PATCH 7/7] avcodec/dca: add native DCA decoder based on libdcadec

[James Almer]

On 1/14/2016 1:28 PM, foo86 wrote:
> +static void sumdiff_c(int32_t *v1, int32_t *v2, intptr_t len)
> +{
> +    int i;
> +
> +    for (i = 0; i < len; i++) {
> +        int32_t t = v1[i] - v2[i];
> +        v1[i] += v2[i];
> +        v2[i] = t;
> +    }
> +}

You have AVFixedDSPContext's butterflies for this, just like you used
AVFloatDSPContext's.