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