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Choose the most suitable voice format

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This commit is contained in:
Pierre Krieger 2015-09-10 17:20:42 +02:00
parent 60e9fa5a6c
commit df063c075c
1 changed files with 31 additions and 2 deletions
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33
src/decoder/wav.rs
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@ -1,4 +1,5 @@
use std::io::{Read, Seek, SeekFrom};
use std::cmp::Ordering;
use super::Decoder;
use super::conversions;
@ -13,7 +14,9 @@ pub struct WavDecoder {
}
impl WavDecoder {
pub fn new<R>(endpoint: &Endpoint, mut data: R) -> Result<WavDecoder, R> where R: Read + Seek + Send + 'static {
pub fn new<R>(endpoint: &Endpoint, mut data: R) -> Result<WavDecoder, R>
where R: Read + Seek + Send + 'static
{
if !is_wave(data.by_ref()) {
return Err(data);
}
@ -21,7 +24,33 @@ impl WavDecoder {
let reader = WavReader::new(data).unwrap();
let spec = reader.spec();
let voice_format = endpoint.get_supported_formats_list().unwrap().next().unwrap();
// choosing a format amongst the ones available
let voice_format = {
let mut formats_list = endpoint.get_supported_formats_list().unwrap().collect::<Vec<_>>();
formats_list.sort_by(|f1, f2| {
if (f1.samples_rate.0 % spec.sample_rate) == 0 && (f2.samples_rate.0 % spec.sample_rate) != 0 {
return Ordering::Greater;
} else if (f2.samples_rate.0 % spec.sample_rate) == 0 && (f1.samples_rate.0 % spec.sample_rate) != 0 {
return Ordering::Less;
}
if f1.channels.len() >= spec.channels as usize && f1.channels.len() < f2.channels.len() {
return Ordering::Greater;
} else if f2.channels.len() >= spec.channels as usize && f2.channels.len() < f1.channels.len() {
return Ordering::Less;
}
if f1.data_type == cpal::SampleFormat::I16 && f2.data_type != cpal::SampleFormat::I16 {
return Ordering::Greater;
} else if f2.data_type == cpal::SampleFormat::I16 && f1.data_type != cpal::SampleFormat::I16 {
return Ordering::Less;
}
Ordering::Equal
});
formats_list.into_iter().next().unwrap()
};
let voice = Voice::new(endpoint, &voice_format).unwrap();
let reader = reader.into_samples().map(|s| s.unwrap_or(0));