mirror of https://github.com/mpv-player/mpv
90 lines
1.9 KiB
C
90 lines
1.9 KiB
C
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#include <string.h>
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#include <sys/ioctl.h>
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#include <sys/soundcard.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include "mixer.h"
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#define DEV_MIXER "/dev/mixer"
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char * mixer_device=NULL;
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char * devname=NULL;
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int mixer_usemaster=0;
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void mixer_getvolume( int *l,int *r )
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{
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int fd,v,cmd,devs;
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if ( !mixer_device ) devname=strdup( DEV_MIXER );
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else devname=strdup( mixer_device );
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fd=open( devname,O_RDONLY );
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free( devname );
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if ( fd != -1 )
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{
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ioctl( fd,SOUND_MIXER_READ_DEVMASK,&devs );
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if ( ( devs & SOUND_MASK_PCM ) && ( mixer_usemaster==0 ) ) cmd=SOUND_MIXER_READ_PCM;
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else
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if ( ( devs & SOUND_MASK_VOLUME ) && ( mixer_usemaster==1 ) ) cmd=SOUND_MIXER_READ_VOLUME;
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else
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{
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close( fd );
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return;
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}
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ioctl( fd,cmd,&v );
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*r=( v & 0xFF00 ) >> 8;
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*l=( v & 0x00FF );
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close( fd );
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}
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}
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void mixer_setvolume( int l,int r )
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{
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int fd,v,cmd,devs;
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if ( !mixer_device ) devname=strdup( DEV_MIXER );
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else devname=strdup( mixer_device );
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fd=open( devname,O_RDONLY );
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free( devname );
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if ( fd != -1 )
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{
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ioctl( fd,SOUND_MIXER_READ_DEVMASK,&devs );
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if ( ( devs & SOUND_MASK_PCM ) && ( mixer_usemaster==0 ) ) cmd=SOUND_MIXER_WRITE_PCM;
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else
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if ( ( devs & SOUND_MASK_VOLUME ) && ( mixer_usemaster==1 ) ) cmd=SOUND_MIXER_WRITE_VOLUME;
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else
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{
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close( fd );
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return;
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}
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v=( r << 8 ) | l;
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ioctl( fd,cmd,&v );
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close( fd );
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}
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}
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int mixer_l=0; int mixer_r=0;
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void mixer_incvolume( void )
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{
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mixer_getvolume( &mixer_l,&mixer_r );
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if ( mixer_l < 100 ) mixer_l++;
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if ( mixer_r < 100 ) mixer_r++;
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mixer_setvolume( mixer_l,mixer_r );
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}
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void mixer_decvolume( void )
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{
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mixer_getvolume( &mixer_l,&mixer_r );
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if ( mixer_l > 0 ) mixer_l--;
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if ( mixer_r > 0 ) mixer_r--;
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mixer_setvolume( mixer_l,mixer_r );
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}
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int mixer_getbothvolume( void )
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{
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mixer_getvolume( &mixer_l,&mixer_r );
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return ( mixer_l + mixer_r ) / 2;
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}
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