On 12/21/16, Ronald S. Bultje <rsbul...@gmail.com> wrote:
> Otherwise the scale factor becomes NaN, resulting in corrupt output.
> Fixes #5426.
> ---
> libavcodec/wmavoice.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/libavcodec/wmavoice.c b/libavcodec/wmavoice.c
> index 90dfe20..cd5958c 100644
> --- a/libavcodec/wmavoice.c
> +++ b/libavcodec/wmavoice.c
> @@ -512,7 +512,8 @@ static void adaptive_gain_control(float *out, const
> float *in,
> speech_energy += fabsf(speech_synth[i]);
> postfilter_energy += fabsf(in[i]);
> }
> - gain_scale_factor = (1.0 - alpha) * speech_energy / postfilter_energy;
> + gain_scale_factor = postfilter_energy == 0.0 ? 0.0 :
> + (1.0 - alpha) * speech_energy / postfilter_energy;
>
> for (i = 0; i < size; i++) {
> mem = alpha * mem + gain_scale_factor;
> --
> 2.8.1
>
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>
lgtm
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