mirror of
https://github.com/libretro/scummvm.git
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85 lines
2.3 KiB
C++
85 lines
2.3 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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/*
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* GP2X Wiz: Hardware Stuff.
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*
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*/
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// Disable symbol overrides so that we can use system headers.
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#define FORBIDDEN_SYMBOL_ALLOW_ALL
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#include "backends/platform/gph/gph-hw.h"
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#include <fcntl.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/mman.h>
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#include <sys/ioctl.h>
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#include <sys/soundcard.h>
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#include <unistd.h>
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namespace WIZ_HW {
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enum {
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VOLUME_NOCHG = 0,
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VOLUME_DOWN = 1,
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VOLUME_UP = 2,
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VOLUME_CHANGE_RATE = 8,
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VOLUME_MIN = 0,
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VOLUME_INITIAL = 60,
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VOLUME_MAX = 100
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};
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int volumeLevel = VOLUME_INITIAL;
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void deviceInit() {
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}
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void deviceDeinit() {
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}
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void mixerMoveVolume(int direction) {
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if (volumeLevel <= 10) {
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if (direction == VOLUME_UP) volumeLevel += VOLUME_CHANGE_RATE / 2;
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if (direction == VOLUME_DOWN) volumeLevel -= VOLUME_CHANGE_RATE / 2;
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} else {
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if (direction == VOLUME_UP) volumeLevel += VOLUME_CHANGE_RATE;
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if (direction == VOLUME_DOWN) volumeLevel -= VOLUME_CHANGE_RATE;
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}
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if (volumeLevel < VOLUME_MIN) volumeLevel = VOLUME_MIN;
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if (volumeLevel > VOLUME_MAX) volumeLevel = VOLUME_MAX;
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unsigned long soundDev = open("/dev/mixer", O_RDWR);
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if (soundDev) {
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int vol = ((volumeLevel << 8) | volumeLevel);
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ioctl(soundDev, SOUND_MIXER_WRITE_PCM, &vol);
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close(soundDev);
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}
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}
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} /* namespace WIZ_HW */
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