musicmanager.c

#include <gbdk/platform.h>
#include <stdint.h>

#include "compat.h"
#include "musicmanager.h"
#include "sfxplayer.h"

volatile uint8_t music_current_track_bank = MUSIC_STOP_BANK;
volatile uint8_t music_mute_mask = MUTE_MASK_NONE;
const MUSIC_MODULE * music_next_track;
uint8_t music_play_isr_counter = 0;
uint8_t music_play_isr_pause = FALSE;
volatile uint8_t music_sfx_priority = MUSIC_SFX_PRIORITY_MINIMAL;
uint8_t music_tick_mask = MUSIC_TICK_MASK_256HZ;

void music_play_isr(void) NONBANKED {
    if (sfx_play_bank != SFX_STOP_BANK) {
        music_driver_mute(music_mute_mask);
        if (!sfx_play_isr()) {
#if defined(NINTENDO)
            music_driver_mute(MUTE_MASK_NONE);
            music_driver_reset_wave();
#endif
#ifdef FORCE_CUT_SFX
            music_sound_cut_mask(music_mute_mask);
#endif
            music_mute_mask = MUTE_MASK_NONE;
            music_sfx_priority = MUSIC_SFX_PRIORITY_MINIMAL;
            sfx_play_bank = SFX_STOP_BANK;
        }
    }
    if (music_play_isr_pause) return;
    if (music_current_track_bank == MUSIC_STOP_BANK) return;
    if (++music_play_isr_counter & music_tick_mask) return;
    uint8_t save_bank = _current_bank;
    CAMERA_SWITCH_ROM(music_current_track_bank);
    if (music_next_track) {
        music_sound_cut();
        music_driver_load(music_next_track);
        music_next_track = 0;
    } else {
        music_driver_tick();
    }
    CAMERA_SWITCH_ROM(save_bank);
}

void music_pause(uint8_t pause) {
    if (music_play_isr_pause = pause) music_sound_cut();
}