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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2014 Franklin Wei, Benjamin Brown
* Copyright (C) 2004 Gregory Montoir
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
#ifndef __MIXER_H__
#define __MIXER_H__
#include "intern.h"
struct MixerChunk {
const uint8_t *data;
uint16_t len;
uint16_t loopPos;
uint16_t loopLen;
};
struct MixerChannel {
uint8_t active;
uint8_t volume;
struct MixerChunk chunk;
uint32_t chunkPos;
uint32_t chunkInc;
};
struct Serializer;
struct System;
#define AUDIO_NUM_CHANNELS 4
struct Mixer {
void *_mutex;
struct System *sys;
/* Since the virtual machine and SDL are running simultaneously in two different threads */
/* any read or write to an elements of the sound channels MUST be synchronized with a */
/* mutex. */
struct MixerChannel _channels[AUDIO_NUM_CHANNELS];
};
void mixer_create(struct Mixer*, struct System *stub);
void mixer_init(struct Mixer*);
void mixer_free(struct Mixer*);
void mixer_playChannel(struct Mixer*, uint8_t channel, const struct MixerChunk *mc, uint16_t freq, uint8_t volume);
void mixer_stopChannel(struct Mixer*, uint8_t channel);
void mixer_setChannelVolume(struct Mixer*, uint8_t channel, uint8_t volume);
void mixer_stopAll(struct Mixer*);
void mixer_saveOrLoad(struct Mixer*, struct Serializer *ser);
#endif
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