[alsa-devel] softvol plugin question

[Takashi Iwai]

At Wed, 07 May 2008 19:25:46 +0100,
Will Wagner wrote:
> 
> Gustavo da Silva Serra wrote:
> > I had this problem with alsamixer itself. It doesn't appear until I call 
> > "alsactl restore". To automate I added this line to /etc/rc.local.
> > 
> 
> Thanks, that fixed it.
> 
> As an aside I had to patch alsa-utils/alsactl/names.c to make it work 
> with my alsa lib as I have disabled midi & seq support. The patch is 
> below, the problem with it is that alsa-lib does not expose in a header 
> anywhere what is enabled/disabled (alsa-lib/include/config.h appears to 
> be a private header that does not get installed).

A good point.  Although one can check the existence easily via some
ifdefs of constants that should be defined in each header, it'd be of
course better to have proper defines to indicate the availablity of
each component...


Takashi

> --- alsa-utils-1.0.16/alsactl/names.c	2008-05-07 19:03:59.000000000 +0100
> +++ alsa-utils-1.0.16/alsactl/names.c.new	2008-05-07 19:03:53.000000000 
> +0100
> @@ -282,6 +282,7 @@ static int probe_pcm(snd_config_t *confi
>   	return 0;
>   }
> 
> +#ifdef BUILD_RAWMIDI
>   static int probe_rawmidi_virtual(snd_config_t *config,
>   				 const char *name, const char *comment)
>   {
> @@ -411,6 +412,7 @@ static int probe_rawmidi(snd_config_t *c
>   		return err;
>   	return 0;
>   }
> +#endif // BUILD_RAWMIDI
> 
>   static int probe_timers(snd_config_t *config)
>   {
> @@ -473,6 +475,7 @@ static int probe_timer(snd_config_t *con
>   	return 0;
>   }
> 
> +#ifdef BUILD_SEQ
>   static int probe_seq(snd_config_t *config)
>   {
>   	int err;
> @@ -492,15 +495,20 @@ static int probe_seq(snd_config_t *confi
>   		return err;
>   	return 0;
>   }
> +#endif
> 
>   typedef int (probe_fcn)(snd_config_t *config);
> 
>   static probe_fcn * probes[] = {
>   	probe_ctl,
>   	probe_pcm,
> +#ifdef BUILD_RAWMIDI
>   	probe_rawmidi,
> +#endif
>   	probe_timer,
> +#ifdef BUILD_SEQ
>   	probe_seq,
> +#endif
>   	NULL
>   };
> 
> 
> 
> -- 
> ------------------------------------------------------------------------
> Will Wagner                                     will_wagner at carallon.com
> Senior Project Engineer                  Office Tel: +44 (0)20 7371 2032
> Carallon Ltd, Studio G20, Shepherds Building, Rockley Rd, London W14 0DA
> ------------------------------------------------------------------------
> 
> 
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