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