#include <fluidsynth.h>

#include <iostream>
#include <fstream>
#include <vector>

const int SAMPLE_LENGTH = 44100;
const int CHANNEL_NUMBER = 2;
const int SECONDS = 30;

std::vector<int16_t> samples(SAMPLE_LENGTH*CHANNEL_NUMBER*SECONDS);

fluid_settings_t* settings;
fluid_synth_t* synth;
fluid_player_t* player;

int main(int argc, char* argv[])
{
    if (argc < 3) {
        std::cout << "Please input a soundfont and midi file.";
        return 1;
    }
    settings = new_fluid_settings();
    synth = new_fluid_synth(settings);
    if (fluid_synth_sfload(synth, argv[1], 1) == FLUID_FAILED) {
        std::cerr << "Unable to open soundfount" << std::endl;
        return 1;
    }
    player = new_fluid_player(synth);
    if (fluid_player_add(player, argv[2]) == FLUID_FAILED) {
        std::cerr << "Unable to open midi" << std::endl;
        return 1;
    }
    if (fluid_player_play(player) == FLUID_FAILED) {
        std::cerr << "Unable to play midi" << std::endl;
        return 1;
    }
    if (fluid_synth_write_s16(synth, SAMPLE_LENGTH*SECONDS, &samples[0], 0, 2, &samples[0], 1, 2) == FLUID_FAILED) {
        std::cerr << "Unable to write buffer" << std::endl;
        return 1;
    }

    // Not what I actually want to do, but it will let you hear it
    std::ofstream file("sound.raw", std::ios::binary);
    file.write((char*)&samples[0], samples.size() * 2);
    file.close();

    return 0;
}