[alsa-devel] amixer: convert percentage into db wrongly
gineera at aspect135.co.uk
Fri Mar 9 13:19:03 CET 2012
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
> + printf(" -R,--raw-volume Use the raw value
> + 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?
Are both options necessary?
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