sound_eg.h

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// -*- coding: utf-8-unix -*-
/*
 * Copyright (c) 2021-2024 Daishi Mori (mori0091)
 *
 * This software is released under the MIT License.\n
 * See https://github.com/mori0091/libmsx/blob/main/LICENSE
 *
 * GitHub libmsx project\n
 * https://github.com/mori0091/libmsx
 */
#pragma once
 
#ifndef SOUND_EG_H
#define SOUND_EG_H
 
#include <stdbool.h>
#include <stdint.h>
 
#define SOUND_EG_TABLE_MAX   (16)
 
#define SOUND_EG_AHDSR       (0)
#define SOUND_EG_LPCM        (1)
 
struct sound_eg_AHDSR {
  uint8_t attack_rate;
  uint8_t hold_time;
  uint8_t decay_rate;
  uint8_t sustain_level;
  uint8_t release_rate;
};
 
struct sound_eg_LPCM {
  uint8_t len;
  uint8_t * data;
};
 
struct sound_eg_attribute {
  uint8_t clz;
  union {
    void * param;
    const struct sound_eg_AHDSR * ahdsr;
    const struct sound_eg_LPCM * lpcm;
  };
};
 
void sound_set_eg_table(const struct sound_eg_attribute * table);
 
#endif