#include <stdlib.h>
#include <stdio.h>
#include <sndfile.h>
#include "jl_mem.h"
#include "const.h"
#include "soundfile.h"

int soundfile_load_stereo(const char *path, float **Lp, float **Rp) {
    SF_INFO fileInfo;
    fileInfo.format = 0;
    fileInfo.channels = 2;
    fileInfo.samplerate = 48000;

    // Open the file.
    SNDFILE *sndFile = sf_open(path, SFM_READ, &fileInfo);
    if (sndFile == NULL) {
        printf("Failed to open file: %s\n", path);
        printf("    Error: %s\n", sf_strerror(sndFile));
        exit(1);
    }

    // Check that the parameters are correct.
    if (fileInfo.channels != 2 || fileInfo.samplerate != 48000) {
        printf("File must be 2 channels and 48 kHz.\n");
        exit(1);
    }

    int len = fileInfo.frames;
    float *L = jl_malloc_exit(len * sizeof(float));
    float *R = jl_malloc_exit(len * sizeof(float));

    float buf[2];

    for(int i = 0; i < len; ++i) {
        if(sf_readf_float(sndFile, buf, 1) != 1) {
            printf("Failed to read frame from file: %s\n", path);
            exit(1);
        }
        L[i] = buf[0];
        R[i] = buf[1];
    }

    sf_close(sndFile);

    *Lp = L;
    *Rp = R;
    return len;
}