#include <math.h>
#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
#include <limits.h>
#include <string.h>
#include "jl_mem.h"
#include "fsample.h"
#include "sample.h"

void sample_load(Sample *s, char *path, SoundConfig *conf, int buf_size)
{
    FSample fs;
    fsample_load(&fs, path, conf, buf_size);

    // Compute the new length.
    int len = fs.len + buf_size;
    len -= len % buf_size;

    // Allocate new arrays.
    s->L = jl_malloc_exit(len * sizeof(int16_t));
    s->R = jl_malloc_exit(len * sizeof(int16_t));
    s->len = len;

    // Zero padding samples at end. 
    for(int i = fs.len; i < len; ++i) {
        s->L[i] = s->R[i] = 0;
    }

    double max = fsample_max_amp(&fs);

    // Use max value to compute gain. 
    s->gain = max / MAX_INT16;

    // Copy data.
    for(int i = 0; i < fs.len; i++) {
        s->L[i] = fs.L[i] / s->gain;
        s->R[i] = fs.R[i] / s->gain;
    }
    
    // Free the fsample data. 
    fsample_free(&fs);
}

void sample_free(Sample *s)
{
    jl_free(s->L);
    jl_free(s->R);
    s->R = s->L = NULL;
    s->len = 0;
}