#ifndef soundconfig_HEADER_
#define soundconfig_HEADER_

#include <stdbool.h>
#include <linux/limits.h> // Provides PATH_MAX. 
#include "const.h"

// A SoundConfig struct represents the configuration for a single sampled
// sound. It contains the path to the files, the sound effects (pre and post),
// global sound effects, and standard configuration.
typedef struct {
    // This is a glob spec for the files to use. All files should end in
    // -XXX-YYY.flac where XXX is the velocity level and YYY is the variation.
    char path[PATH_MAX];

    char fx_pre[MAX_FX][MAX_FX_LINE];
    char fx_post[MAX_FX][MAX_FX_LINE];

    char global_fx_pre[MAX_FX][MAX_FX_LINE];
    char global_fx_post[MAX_FX][MAX_FX_LINE];

    // The amplitude of the sample as a function of velocity. For a normalized
    // velocity between 0 and 1, the amplitude of the output will scale like
    // velocity^gamma_amp.
    double gamma_amp;

    // Similar to gamma_amp, but used when choosing the velocity layer.
    double gamma_layer;

    // If non-zero, this is the fade out time-constant (e-folding time) when a
    // sound is released (key-up event). 
    double tau_off;

    // If non-zero, this is the fade-out time-constant (e-folding time) when a
    // sound is cut by another sound. The cut time constant will override
    // tau_off.
    double tau_cut;

    // If true, trigger two layers with proportional amplitudes when velocity
    // lands between them.
    bool mix_layers;
    

} SoundConfig;

void soundconfig_load_defaults(SoundConfig *conf);
void soundconfig_copy_globals(SoundConfig *to, SoundConfig *from);
void soundconfig_proc_fx(SoundConfig *conf, const char *line, bool pre);
double proc_raw_tau_value(double value);

#endif