70 lines
1.8 KiB
C
70 lines
1.8 KiB
C
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/*
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* vic20sound.h - implementation of VIC20 sound code
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*
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* Written by
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* Teemu Rantanen <tvr@cs.hut.fi>
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*
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* This file is part of VICE, the Versatile Commodore Emulator.
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* See README for copyright notice.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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., 59 Temple Place, Suite 330, Boston, MA
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* 02111-1307 USA.
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*
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*/
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#ifndef VICE_VIC20SOUND_H
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#define VICE_VIC20SOUND_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stdint.h>
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struct sound_vic20_s {
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unsigned char div;
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struct {
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unsigned char out;
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unsigned char reg;
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unsigned char shift;
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signed short ctr;
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} ch[4];
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unsigned short noisectr;
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unsigned char volume;
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int cyclecount;
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int accum;
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int accum_cycles;
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float cycles_per_sample;
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float leftover_cycles;
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int speed;
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float highpassbuf;
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float highpassbeta;
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float lowpassbuf;
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float lowpassbeta;
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};
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typedef struct sound_vic20_s sound_vic20_t;
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int vic_sound_machine_init(sound_vic20_t *snd, int speed, int cycles_per_sec);
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void vic_sound_machine_store(sound_vic20_t *snd, uint16_t addr, uint8_t value);
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int vic_sound_machine_calculate_samples(sound_vic20_t *snd, int16_t *pbuf, int nr, int soc, int scc, uint32_t delta_t);
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#ifdef __cplusplus
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};
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#endif
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#endif
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