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Hide the implementation of the decoder

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This commit is contained in:
Pierre Krieger 2015-10-16 13:42:57 +02:00
parent 2e09c3494d
commit 5ab65b7a31
1 changed files with 22 additions and 20 deletions
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42
src/decoder/mod.rs
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@ -3,11 +3,13 @@ use std::io::{Read, Seek};
use Sample;
use Source;
pub mod vorbis;
pub mod wav;
mod vorbis;
mod wav;
/// Source of audio samples from decoding a file.
pub enum Decoder<R> where R: Read + Seek {
pub struct Decoder<R>(DecoderImpl<R>) where R: Read + Seek;
enum DecoderImpl<R> where R: Read + Seek {
Wav(wav::WavDecoder<R>),
Vorbis(vorbis::VorbisDecoder),
}
@ -17,12 +19,12 @@ impl<R> Decoder<R> where R: Read + Seek + Send + 'static {
let data = match wav::WavDecoder::new(data) {
Err(data) => data,
Ok(decoder) => {
return Decoder::Wav(decoder);
return Decoder(DecoderImpl::Wav(decoder));
}
};
if let Ok(decoder) = vorbis::VorbisDecoder::new(data) {
return Decoder::Vorbis(decoder);
return Decoder(DecoderImpl::Vorbis(decoder));
}
panic!("Invalid format");
@ -34,17 +36,17 @@ impl<R> Iterator for Decoder<R> where R: Read + Seek {
#[inline]
fn next(&mut self) -> Option<f32> {
match self {
&mut Decoder::Wav(ref mut source) => source.next().map(|s| s.to_f32()),
&mut Decoder::Vorbis(ref mut source) => source.next(),
match self.0 {
DecoderImpl::Wav(ref mut source) => source.next().map(|s| s.to_f32()),
DecoderImpl::Vorbis(ref mut source) => source.next(),
}
}
#[inline]
fn size_hint(&self) -> (usize, Option<usize>) {
match self {
&Decoder::Wav(ref source) => source.size_hint(),
&Decoder::Vorbis(ref source) => source.size_hint(),
match self.0 {
DecoderImpl::Wav(ref source) => source.size_hint(),
DecoderImpl::Vorbis(ref source) => source.size_hint(),
}
}
}
@ -54,25 +56,25 @@ impl<R> Iterator for Decoder<R> where R: Read + Seek {
impl<R> Source for Decoder<R> where R: Read + Seek {
#[inline]
fn get_current_frame_len(&self) -> usize {
match self {
&Decoder::Wav(ref source) => source.get_current_frame_len(),
&Decoder::Vorbis(ref source) => source.get_current_frame_len(),
match self.0 {
DecoderImpl::Wav(ref source) => source.get_current_frame_len(),
DecoderImpl::Vorbis(ref source) => source.get_current_frame_len(),
}
}
#[inline]
fn get_channels(&self) -> u16 {
match self {
&Decoder::Wav(ref source) => source.get_channels(),
&Decoder::Vorbis(ref source) => source.get_channels(),
match self.0 {
DecoderImpl::Wav(ref source) => source.get_channels(),
DecoderImpl::Vorbis(ref source) => source.get_channels(),
}
}
#[inline]
fn get_samples_rate(&self) -> u32 {
match self {
&Decoder::Wav(ref source) => source.get_samples_rate(),
&Decoder::Vorbis(ref source) => source.get_samples_rate(),
match self.0 {
DecoderImpl::Wav(ref source) => source.get_samples_rate(),
DecoderImpl::Vorbis(ref source) => source.get_samples_rate(),
}
}
}