[alsa-devel] amixer: convert percentage into db wrongly
tiwai at suse.de
Fri Mar 9 13:50:51 CET 2012
At Fri, 9 Mar 2012 12:19:03 +0000,
Alan Horstmann wrote:
> On Friday 09 March 2012 11:33, Takashi Iwai wrote:
> > The implementation isn't too hard. I wrote a quick patch now as below.
> > It became bigger than I thought since it contains many clean-ups that
> > are needed to adapt the mapped volume.
> > With the patch, amixer shows and reads the percent value with -M
> > option just like in alsamixer.
> > --- a/amixer/amixer.c
> > +++ b/amixer/amixer.c
> > @@ -29,7 +29,9 @@
> > #include <assert.h>
> > #include <alsa/asoundlib.h>
> > #include <sys/poll.h>
> > +#include <stdint.h>
> > #include "amixer.h"
> > +#include "../alsamixer/volume_mapping.h"
> > #define LEVEL_BASIC (1<<0)
> > #define LEVEL_INACTIVE (1<<1)
> > @@ -68,6 +70,8 @@ static int help(void)
> > printf(" -i,--inactive show also inactive controls\n");
> > printf(" -a,--abstract L select abstraction level (none or basic)\n");
> > printf(" -s,--stdin Read and execute commands from stdin
> > sequentially\n");
> > + printf(" -R,--raw-volume Use the raw value
> > (default)\n");
> > + printf(" -M,--mapped-volume Use the mapped volume\n");
> A small comment...
> What if both -R and -M are used? Isn't -R equivalent to the absence of -M?
The option set later wins.
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