wasapi 0.25.0

Bindings for the Wasapi API on Windows
Documentation 
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// Scan an output device for the formats it supports in exclusive mode.
// Give a device name as an argument, or nothing to use the default device.
//
// See the dataranges example to check what a driver declares
// against what its device really accepts.

use std::collections::BTreeMap;
use std::time::Instant;
use wasapi::*;

use simplelog::*;

/// Make a short label for a sample format, such as "S16", "F32" or "S24_in_32".
fn format_name(wave_fmt: &WaveFormat) -> String {
    let sample_type = match wave_fmt.get_subformat() {
        Ok(SampleType::Float) => "F",
        _ => "S",
    };
    let storebits = wave_fmt.get_bitspersample();
    let validbits = wave_fmt.get_validbitspersample();
    if storebits == validbits {
        format!("{sample_type}{storebits}")
    } else {
        format!("{sample_type}{validbits}_in_{storebits}")
    }
}

fn main() {
    let _ = SimpleLogger::init(
        LevelFilter::Info,
        ConfigBuilder::new()
            .set_time_format_rfc3339()
            .set_time_offset_to_local()
            .unwrap()
            .build(),
    );

    initialize_mta().unwrap();

    let enumerator = DeviceEnumerator::new().unwrap();
    // Give a device name as an argument, or nothing to use the default device.
    let device = match std::env::args().nth(1) {
        Some(name) => enumerator
            .get_device_collection(&Direction::Render)
            .unwrap()
            .get_device_with_name(&name)
            .unwrap(),
        None => enumerator.get_default_device(&Direction::Render).unwrap(),
    };
    println!("Scanning device {:?}..", device.get_friendlyname().unwrap());

    // This uses the capabilities that the driver declares, when it has any.
    let mut probe = CapabilityProbe::new(&device).unwrap();
    if !probe.data_ranges().is_empty() {
        println!("The driver declares {} ranges.", probe.data_ranges().len());
    }
    let start = Instant::now();
    let formats = probe.supported_formats_all_rates();
    println!("The scan took {} ms.", start.elapsed().as_millis());

    // Group the formats by channel count and sample rate.
    let mut grouped: BTreeMap<u16, BTreeMap<u32, Vec<String>>> = BTreeMap::new();
    for wave_fmt in &formats {
        grouped
            .entry(wave_fmt.get_nchannels())
            .or_default()
            .entry(wave_fmt.get_samplespersec())
            .or_default()
            .push(format_name(wave_fmt));
    }

    if grouped.is_empty() {
        println!("The device supports nothing in exclusive mode.");
        return;
    }
    for (channels, rates) in grouped {
        println!("{channels} channels:");
        for (samplerate, names) in rates {
            println!("  {samplerate} Hz: {}", names.join(", "));
        }
    }
}