Re: [Qemu-devel] [PATCH 06/11] hw/ac97: add support for volume control

[malc <av1474@comtv.ru>]

On Mon, 12 Mar 2012, Marc-Andr? Lureau wrote:

> Combine output volume with Master and PCM registers values.
> Use default values in mixer_reset ().
> Set volume on post-load to update backend values.
> ---
>  hw/ac97.c |   79 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>  1 files changed, 79 insertions(+), 0 deletions(-)
> 
> diff --git a/hw/ac97.c b/hw/ac97.c
> index f7866ed..227233c 100644
> --- a/hw/ac97.c
> +++ b/hw/ac97.c
> @@ -436,6 +436,63 @@ static void reset_voices (AC97LinkState *s, uint8_t active[LAST_INDEX])
>      AUD_set_active_in (s->voice_mc, active[MC_INDEX]);
>  }
>  
> +static void get_volume (uint16_t vol, uint16_t mask, int inverse,
> +                        int *mute, uint8_t *lvol, uint8_t *rvol)
> +{
> +  *mute = (vol >> MUTE_SHIFT) & 1;
> +  *rvol = (255 * (vol & mask)) / mask;
> +  *lvol = (255 * ((vol >> 8) & mask)) / mask;
> +  if (inverse) {
> +    *rvol = 255 - *rvol;
> +    *lvol = 255 - *lvol;
> +  }
> +}

Indentation is off here.

[..snip..]

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