//! The following is an adaptation of the "pa_devs.c" official PortAudio C example.

extern crate portaudio;
use portaudio as pa;

const INTERLEAVED: bool = true;
const LATENCY: pa::Time = 0.0; // Ignored by PortAudio::is_*_format_supported.
const STANDARD_SAMPLE_RATES: [f64; 13] = [
    8000.0, 9600.0, 11025.0, 12000.0, 16000.0, 22050.0, 24000.0, 32000.0, 44100.0, 48000.0,
    88200.0, 96000.0, 192000.0,
];

fn main() {
    match run() {
        Ok(_) => {}
        e => {
            eprintln!("Example failed with the following: {:?}", e);
        }
    }
}

fn run() -> Result<(), pa::Error> {
    let pa = pa::PortAudio::new()?;

    let num_devices = pa.device_count()?;
    println!("Number of devices = {}", num_devices);

    println!("Defualt input device: {:?}", pa.default_input_device());
    println!("Defualt output device: {:?}", pa.default_output_device());

    println!("All devices:");
    for device in pa.devices()? {
        let (idx, info) = device?;
        println!("--------------------------------------- {:?}", idx);
        println!("{:#?}", &info);

        let in_channels = info.max_input_channels;
        let input_params = pa::StreamParameters::<i16>::new(idx, in_channels, INTERLEAVED, LATENCY);
        let out_channels = info.max_output_channels;
        let output_params =
            pa::StreamParameters::<i16>::new(idx, out_channels, INTERLEAVED, LATENCY);

        println!(
            "Supported standard sample rates for half-duplex 16-bit {} channel input:",
            in_channels
        );
        for &sample_rate in &STANDARD_SAMPLE_RATES {
            if pa
                .is_input_format_supported(input_params, sample_rate)
                .is_ok()
            {
                println!("\t{}hz", sample_rate);
            }
        }

        println!(
            "Supported standard sample rates for half-duplex 16-bit {} channel output:",
            out_channels
        );
        for &sample_rate in &STANDARD_SAMPLE_RATES {
            if pa
                .is_output_format_supported(output_params, sample_rate)
                .is_ok()
            {
                println!("\t{}hz", sample_rate);
            }
        }

        println!("Supported standard sample rates for full-duplex 16-bit {} channel input, {} channel output:",
                 in_channels, out_channels);
        for &sample_rate in &STANDARD_SAMPLE_RATES {
            if pa
                .is_duplex_format_supported(input_params, output_params, sample_rate)
                .is_ok()
            {
                println!("\t{}hz", sample_rate);
            }
        }
    }

    Ok(())
}