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Fix #254, logic error in frame/sample size

This commit is contained in:
Tatsuyuki Ishi 2019-04-29 20:33:03 +09:00
parent 0b6df67085
commit af88cd87e2
1 changed files with 9 additions and 14 deletions
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23
src/alsa/mod.rs
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@ -517,7 +517,7 @@ impl EventLoop {
}
// Determine the number of samples that are available to read/write.
let available = {
let available_samples = {
let available = alsa::snd_pcm_avail(stream_inner.channel); // TODO: what about snd_pcm_avail_update?
if available == -32 {
@ -533,7 +533,7 @@ impl EventLoop {
}
};
if available < stream_inner.period_len {
if available_samples < stream_inner.period_len {
i_descriptor += stream_inner.num_descriptors as isize;
i_stream += 1;
continue;
@ -541,19 +541,19 @@ impl EventLoop {
let stream_id = stream_inner.id.clone();
let available_frames = available_samples / stream_inner.num_channels as usize;
match stream_type {
StreamType::Input => {
// Simplify shared logic across the sample format branches.
macro_rules! read_buffer {
($T:ty, $Variant:ident) => {{
// The buffer to read into.
let mut buffer: Vec<$T> = iter::repeat(mem::uninitialized())
.take(available)
.collect();
let mut buffer: Vec<$T> = vec![Default::default(); available_samples];
let err = alsa::snd_pcm_readi(
stream_inner.channel,
buffer.as_mut_ptr() as *mut _,
available as _,
available_frames as alsa::snd_pcm_uframes_t,
);
check_errors(err as _).expect("snd_pcm_readi error");
let input_buffer = InputBuffer {
@ -579,9 +579,7 @@ impl EventLoop {
SampleFormat::I16 => {
let buffer = OutputBuffer {
stream_inner: stream_inner,
buffer: iter::repeat(mem::uninitialized())
.take(available)
.collect(),
buffer: vec![Default::default(); available_samples],
};
UnknownTypeOutputBuffer::I16(::OutputBuffer { target: Some(buffer) })
@ -589,9 +587,7 @@ impl EventLoop {
SampleFormat::U16 => {
let buffer = OutputBuffer {
stream_inner: stream_inner,
buffer: iter::repeat(mem::uninitialized())
.take(available)
.collect(),
buffer: vec![Default::default(); available_samples],
};
UnknownTypeOutputBuffer::U16(::OutputBuffer { target: Some(buffer) })
@ -599,8 +595,7 @@ impl EventLoop {
SampleFormat::F32 => {
let buffer = OutputBuffer {
stream_inner: stream_inner,
// Note that we don't use `mem::uninitialized` because of sNaN.
buffer: iter::repeat(0.0).take(available).collect(),
buffer: vec![Default::default(); available_samples]
};
UnknownTypeOutputBuffer::F32(::OutputBuffer { target: Some(buffer) })