/* 
 * Transform object test
 * 
 * Compile with: 
 * gcc -Wall -o transformtest transformtest.c transform.c -lsndfile -lfftw3f
 */

#include <stdio.h>
#include <sndfile.h>
#include <stdlib.h>
#include <string.h>
#include "transform.h"

#define BLOCKSIZE 2048

static void transformed(fftwf_complex *freqdata, void *data) {
}

int main(int argc, char *argv[]) {
    if (argc != 3) {
        printf("Usage: infile outfile\n");
        return 1;
    }

    SF_INFO info;
    info.format = 0;
    SNDFILE *infile = sf_open(argv[1], SFM_READ, &info);
    SNDFILE *outfile = sf_open(argv[2], SFM_WRITE, &info);

    int16_t *buffer = calloc(BLOCKSIZE, sizeof(*buffer));
    Transform *transform = transform_new(BLOCKSIZE, transformed, NULL);

    while (1) {
        int read = sf_read_short(infile, buffer, BLOCKSIZE);
        if (read < BLOCKSIZE) {
            memset(buffer + read, 0, (BLOCKSIZE - read) * sizeof(*buffer));
        }
        transform_push(transform, buffer);
        int16_t *processed;
        while ((processed = transform_pop(transform)) != NULL) {
            sf_write_short(outfile, processed, BLOCKSIZE / 2);
        }
        if (read < BLOCKSIZE) {
            // losing the last half block
            break;
        }
    }

    transform_destroy(transform);

    sf_close(outfile);
    sf_close(infile);

    return 0;
}