int main(int argc, char *argv[]) {

    printf("Audio Processing \n");

    printf("blog:http://cpuimage.cnblogs.com/ \n");

    printf("Pitch Shifting Using The Fourier Transform\n");

    if (argc < )

        return -;

    char *in_file = argv[];

    uint32_t sampleRate = ;

    uint64_t totalSampleCount = ;

    uint32_t channels = ;

    short *data_in = wavRead_s16(in_file, &sampleRate, &totalSampleCount, &channels);

    if (data_in != NULL) {

        float pitchShift = 0.9f;

        size_t ms = ;

        size_t overSampling = ;

        size_t frameSize = sampleRate * ms / ;

        frameSize += frameSize % ;

        planData pitchPlanData = {};

        double startTime = now();

        makePlanData(frameSize, overSampling, sampleRate, &pitchPlanData);

        pitchshift(pitchShift, data_in, data_in, totalSampleCount, &pitchPlanData);

        // turn to minion pitch

        {

            totalSampleCount /= ;

            short *samples = data_in;

            for (int i = ; i < totalSampleCount; i++) {

                data_in[i] = samples[];

                samples += ;

            }

        }

        double time_interval = calcElapsed(startTime, now());

        freePlanData(&pitchPlanData);

        printf("time interval: %f ms\n ", (time_interval * ));

    }

    char drive[];

    char dir[];

    char fname[];

    char ext[];

    char out_file[];

    splitpath(in_file, drive, dir, fname, ext);

    sprintf(out_file, "%s%s%s_out%s", drive, dir, fname, ext);

    wavWrite_s16(out_file, data_in, sampleRate, totalSampleCount);

    if (data_in) {

        free(data_in);

    }

    printf("press any key to exit.\n");

    getchar();

    return ;

}