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https://github.com/mupen64plus/mupen64plus-oldsvn.git
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126 lines
2.8 KiB
C
126 lines
2.8 KiB
C
/**
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* Mupen64 - volume.c
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* Copyright (C) 2002 Hacktarux
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*
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* Mupen64 homepage: http://mupen64.emulation64.com
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* email address: hacktarux@yahoo.fr
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*
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* If you want to contribute to the project please contact
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* me first (maybe someone is already making what you are
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* planning to do).
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*
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*
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* This program is free software; you can redistribute it and/
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* or modify it under the terms of the GNU General Public Li-
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* cence as published by the Free Software Foundation; either
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* version 2 of the Licence, or any later version.
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*
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* This program is distributed in the hope that it will be use-
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* ful, but WITHOUT ANY WARRANTY; without even the implied war-
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* ranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public Licence for more details.
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*
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* You should have received a copy of the GNU General Public
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* Licence along with this program; if not, write to the Free
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* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
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* USA.
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*
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**/
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/* Sound volume functions.
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*/
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#include <windows.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <errno.h>
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#include "volume.h"
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#include "../guifuncs.h"
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#include "../translate.h"
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static int g_VolMuted = 0; // volume muted?
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/* volSet
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* Sets volume of left and right PCM channels to given percentage (0-100) value.
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*/
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void volSet(int percent)
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{
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int volume = (DWORD)(0xFFFF*1.0*percent/100.0);
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WAVEFORMATEX wfex;
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wfex.wFormatTag = WAVE_FORMAT_PCM;
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wfex.nChannels = 1;
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wfex.nSamplesPerSec = 8000*1000;
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wfex.wBitsPerSample = 8;
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wfex.nBlockAlign = wfex.nChannels*wfex.wBitsPerSample/8;
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wfex.nAvgBytesPerSec = wfex.nSamplesPerSec*wfex.nBlockAlign;
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wfex.cbSize = 0;
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HWAVEOUT waveout;
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int id;
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for (id=0;id<waveOutGetNumDevs();id++)
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{
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if (waveOutOpen(&waveout,id,&wfex,0,0,CALLBACK_NULL) == MMSYSERR_NOERROR)
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{
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waveOutSetVolume(waveout,volume);
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waveOutClose(waveout);
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break;
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}
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}
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}
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/* volGet
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* Returns volume of PCM channel as a percentage (0-100).
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*/
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int volGet(void)
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{
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int vol;
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// Open the audio device
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// Get the volume into vol
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// Close the audio device
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return vol & 0xff; // just return the left channel
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}
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/* volMute
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* Mute/unmute volume.
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*/
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void volMute(void)
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{
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static int saveVol = 0;
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if(g_VolMuted)
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{
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volSet(saveVol);
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}
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else
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{
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saveVol = volGet();
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volSet(0);
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}
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g_VolMuted = !g_VolMuted;
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}
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/* volIsMuted
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* Returns 1 if volume is muted, else 0.
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*/
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int volIsMuted(void)
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{
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return g_VolMuted;
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}
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/* volChange
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* Increase/decrease volume by the given percentage.
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*/
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void volChange(int delta)
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{
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// if we're muted, unmute before changing volume
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if(g_VolMuted)
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volMute();
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volSet(volGet() + delta);
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}
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