The process method for the audio visualizer

process.c

int process(jack_nframes_t nframes, void *arg) {
        sample_t *outBufferLeft = (sample_t *) jack_port_get_buffer(output_port_l, nframes);
        sample_t *outBufferRight = (sample_t *) jack_port_get_buffer(output_port_r, nframes);
        sample_t *inBufferLeft = (sample_t *) jack_port_get_buffer(input_port_l, nframes);
        sample_t *inBufferRight = (sample_t *) jack_port_get_buffer(input_port_r, nframes);

        // copy input audio to output
        memcpy(outBufferLeft, inBufferLeft, sizeof(sample_t) * nframes);
        memcpy(outBufferRight, inBufferRight, sizeof(sample_t) * nframes);

        // calculate an estimate for the volume of the data
        double total = 0;
        for (int i = 0; i < nframes; i++) {
                total += pow(outBufferLeft[i], 2);
                total += pow(outBufferRight[i], 2);
        }

        // print to the console based on the volume estimate
        if (total > 0.3) {
                printf("\n111111111111111111");
        } else {
                printf("\n000000000000000000");
        }

        // uncomment the following line for debugging
        // printf("%f\n", total);

        return 0;
}