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#include <string.h>
#ifndef __MINGW32__
#include <sys/ioctl.h>
#endif
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include "config.h"
#include "libao2/audio_out.h"
#include "libaf/af.h"
#include "mixer.h"
#include "help_mp.h"
char * mixer_device=NULL;
char * mixer_channel=NULL;
void mixer_getvolume(mixer_t *mixer, float *l, float *r)
{
ao_control_vol_t vol;
*l=0; *r=0;
if(mixer->audio_out){
if(CONTROL_OK != mixer->audio_out->control(AOCONTROL_GET_VOLUME,&vol)) {
if (!mixer->afilter)
return;
else {
float db_vals[AF_NCH];
if (!af_control_any_rev(mixer->afilter,
AF_CONTROL_VOLUME_LEVEL | AF_CONTROL_GET, db_vals))
db_vals[0] = db_vals[1] = 1.0;
else
af_from_dB (2, db_vals, db_vals, 20.0, -200.0, 60.0);
vol.left = db_vals[0] * 90.0;
vol.right = db_vals[1] * 90.0;
}
}
*r=vol.right;
*l=vol.left;
}
}
void mixer_setvolume(mixer_t *mixer, float l, float r)
{
ao_control_vol_t vol;
vol.right=r; vol.left=l;
if(mixer->audio_out){
if(CONTROL_OK != mixer->audio_out->control(AOCONTROL_SET_VOLUME,&vol)) {
if (!mixer->afilter)
return;
else {
// af_volume uses values in dB
float db_vals[AF_NCH];
int i;
// a volume of 90% will give 0 dB (no change)
// like this, amplification is possible as well
db_vals[0] = l / 90.0;
db_vals[1] = r / 90.0;
for (i = 2; i < AF_NCH; i++) {
db_vals[i] = (l + r) / 180.0;
}
af_to_dB (AF_NCH, db_vals, db_vals, 20.0);
if (!af_control_any_rev(mixer->afilter,
AF_CONTROL_VOLUME_LEVEL | AF_CONTROL_SET, db_vals)) {
mp_msg(MSGT_GLOBAL, MSGL_INFO, MSGTR_InsertingAfVolume);
if (af_add(mixer->afilter, "volume")) {
if (!af_control_any_rev(mixer->afilter,
AF_CONTROL_VOLUME_LEVEL | AF_CONTROL_SET, db_vals)) {
mp_msg(MSGT_GLOBAL, MSGL_ERR, MSGTR_NoVolume);
return;
}
}
}
}
}
}
mixer->muted=0;
}
void mixer_incvolume(mixer_t *mixer)
{
float mixer_l, mixer_r;
mixer_getvolume(mixer, &mixer_l, &mixer_r);
mixer_l += mixer->volstep;
if ( mixer_l > 100 ) mixer_l = 100;
mixer_r += mixer->volstep;
if ( mixer_r > 100 ) mixer_r = 100;
mixer_setvolume(mixer, mixer_l, mixer_r);
}
void mixer_decvolume(mixer_t *mixer)
{
float mixer_l, mixer_r;
mixer_getvolume(mixer, &mixer_l, &mixer_r);
mixer_l -= mixer->volstep;
if ( mixer_l < 0 ) mixer_l = 0;
mixer_r -= mixer->volstep;
if ( mixer_r < 0 ) mixer_r = 0;
mixer_setvolume(mixer, mixer_l, mixer_r);
}
void mixer_getbothvolume(mixer_t *mixer, float *b)
{
float mixer_l, mixer_r;
mixer_getvolume(mixer, &mixer_l, &mixer_r);
*b = ( mixer_l + mixer_r ) / 2;
}
void mixer_mute(mixer_t *mixer)
{
if (mixer->muted) mixer_setvolume(mixer, mixer->last_l, mixer->last_r);
else
{
mixer_getvolume(mixer, &mixer->last_l, &mixer->last_r);
mixer_setvolume(mixer, 0, 0);
mixer->muted=1;
}
}
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