diff options
Diffstat (limited to 'src/audio.rs')
| -rw-r--r-- | src/audio.rs | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/src/audio.rs b/src/audio.rs index e3100ae..01273d7 100644 --- a/src/audio.rs +++ b/src/audio.rs @@ -3,7 +3,10 @@ use portaudio as pa; use std::sync::mpsc::*; pub const SAMPLE_RATE: f32 = 44100.0; -pub const FRAMES: usize = 512; +// I want to use the frames constant in contexts where I need to cast +// it to f32 (eg for generating a sine wave). Therefore its type must +// be convertable to f32 losslessly. Hence the type of u16. +pub const FRAMES: u16 = 512; pub fn init() -> Result<pa::PortAudio, pa::Error> { pa::PortAudio::new() @@ -43,10 +46,10 @@ pub fn start_listening(pa: &pa::PortAudio, device_index: u32, let input_params = pa::StreamParameters::<f32>::new(pa::DeviceIndex(device_index), 1, true, latency); // Check that the stream format is supported. - try!(pa.is_input_format_supported(input_params, SAMPLE_RATE as f64)); + try!(pa.is_input_format_supported(input_params, f64::from(SAMPLE_RATE))); // Construct the settings with which we'll open our stream. - let stream_settings = pa::InputStreamSettings::new(input_params, SAMPLE_RATE as f64, FRAMES as u32); + let stream_settings = pa::InputStreamSettings::new(input_params, f64::from(SAMPLE_RATE), u32::from(FRAMES)); // This callback A callback to pass to the non-blocking stream. let callback = move |pa::InputStreamCallbackArgs { buffer, .. }| { |