#ifndef sampler_HEADER_
#define sampler_HEADER_

#include <limits.h>
#include <jack/jack.h>
#include "jl_ringbuf.h"
#include "sound.h"

// MidiEvt: A MIDI event. The event has a `type`, which is one of the constants
// MIDI_EVT_*. Depending on the event type, it will contain a (control, value)
// or a (node, velocity) pair.
typedef struct {
    int    type;    // One of the MIDI_EVT_* constants. 
    union {
        int control;
        int note;
    };
    union {
        double value;
        double velocity;
    };
} MidiEvt;


typedef struct {
    // Global sound config.
    char section[MAX_NAME];
    SoundConfig global_conf;

    // When loading the configuration file, this is used to map names to
    // sound indices.
    int32_t num_sounds;
    char index[MAX_SOUNDS][MAX_NAME];

    char base_dir[PATH_MAX];

    // Min/max values output by controller.
    int midi_min_vel;
    int midi_max_vel;

    // Ring buffers for midi events.
    RingBuffer *midi_free; // Consumed by the midi thread.
    RingBuffer *midi_new;  // Consumed by the jack thread.

    // Midi map.
    int num_triggers[MAX_SOUNDS];
    int trigger_map[MAX_SOUNDS][MAX_SOUNDS];

    // Cut map.
    int num_cuts[MAX_SOUNDS];
    int cut_map[MAX_SOUNDS][MAX_SOUNDS];

    // Jack client and ports.
    jack_client_t *jack_client;
    jack_port_t *jack_port_L, *jack_port_R;

    // The sounds.
    int buf_size;
    Sound sounds[MAX_SOUNDS];

    // Sustain pedal value.
    int sustainControl;

    // Output amplitudes.
    float L_max;
    float R_max;
} Sampler;

void sampler_main(Sampler *sampler);
void sampler_free(Sampler *sampler);

#endif