Blargg's blip_buf.c does anyone use it?

This library resamples audio waveforms from input clock rate to output
sample rate. Usage follows this general pattern:

* Create buffer with blip_new().
* Set clock rate and sample rate with blip_set_rates().
* Waveform generation loop:
   - Generate several clocks of waveform with blip_add_delta().
   - End time frame with blip_end_frame().
   - Read samples from buffer with blip_read_samples().
* Free buffer with blip_delete().

static blip_buffer_t* blip;

void init_blip()
{
blip = blip_new( 48000/10);                     //Blargg's states that 1/10 it's enough for the allocated buffer
blip_set_rates( blip, 1789773.0, 48000);     // NES NTSC clk and sample rate
}

void add_deltas(int cpu_cc)
{
    /* Well, this is what Blargg's states: it should run on a loop and add the "deltas" */
    for (int i = 0; i < cpu_cc; i++)
    {
        float sample = GetApuOutput();      //in float values
        sample *= 0x07FFF;                     //i don't know this is right
        blip_add_delta(blip, Sound.cpu_cc, (int)sample);
        Sound.cpu_cc++;
    }
}

/* He also states that at the end of a frame you should do something like this -> */
void write_buffer()
{
   if (!SoundOut.IsPlaying())       // this is DSound things
      SoundStartFirstTime();

   blip_end_frame(blip, Sound.cpu_cc); // here i have a doubt: the second parameter, are the cc elapsed. It's a time var, i don't know
   int avail = blip_samples_avail(blip); // Get the samples available
   
   blip_read_samples(blip, Sound.buffer, avail, 0);  //Copy the blarggs buffer to my DSound buffer in mono
   SoundOut.WriteBuffer((char *)Sound.buffer, avail * 2); //Write to my DSound buffer
   Sound.cpu_cc = 0;                                            //reset cpu_cc cycles counter

}

void close()
{
    blip_delete(blip);
}

    if (Sound.cc_counter >= samples_div)         //samples_div = 37.5~
   {
   int sample = GetPulse1Out() ;
   sample *=8;
   blip_add_delta(blip, Sound.cpu_cc++, sample);
   Sound.cc_counter -= samples_div;
   }
   else
   blip_add_delta(blip, Sound.cpu_cc++, 0);

   Sound.cc_counter++;

    float sample = GetApuOutput();                    //Get float mixed channels APU data
    sample *= 10.0;                                        //I do this to have an integer type, since the value returned before is > 0
    blip_add_delta(blip, Sound.cpu_cc, sample);   //Add the sample
    Sound.cpu_cc+=samples_div;                      //The cpu cc counter i mentioned before (usually set to 37.2~)

int total_samples = 800;
int samples_needed = total_samples - blip_samples_avail( blip );
int clocks_needed = blip_clocks_needed( blip, samples_needed );
blip_end_frame( blip, clocks_needed );