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Fix WASAPI capture logic 

The buffer size handling differs from what render streams uses. Logic is based on https://github.com/microsoft/Windows-universal-samples/blob/master/Samples/WindowsAudioSession/cpp/WASAPICapture.cpp.
This commit is contained in:
ishitatsuyuki 2019-08-12 10:56:14 +09:00
parent 36dee482bd
commit e9043c605a
1 changed files with 60 additions and 49 deletions
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33
src/host/wasapi/stream.rs
View File

@ -502,25 +502,25 @@ impl EventLoop {
let stream_idx = handle_idx - 1;
let stream = &mut run_context.streams[stream_idx];
// The number of frames available for reading/writing.
let mut frames_available = match get_available_frames(stream) {
Ok(0) => continue, // TODO: Can this happen?
Ok(n) => n,
Err(err) => {
streams_to_remove.push((stream.id.clone(), err));
continue;
}
};
let sample_size = stream.sample_format.sample_size();
// Obtaining a pointer to the buffer.
match stream.client_flow {
AudioClientFlow::Capture { capture_client } => {
let mut frames_available = 0;
// Get the available data in the shared buffer.
let mut buffer: *mut BYTE = mem::uninitialized();
let mut flags = mem::uninitialized();
loop {
let hresult = (*capture_client).GetNextPacketSize(&mut frames_available);
if let Err(err) = stream_error_from_hresult(hresult) {
streams_to_remove.push((stream.id.clone(), err));
break; // Identical to continuing the outer loop
}
if frames_available == 0 {
break;
}
let hresult = (*capture_client).GetBuffer(
&mut buffer,
&mut frames_available,
@ -534,7 +534,7 @@ impl EventLoop {
continue;
} else if let Err(err) = stream_error_from_hresult(hresult) {
streams_to_remove.push((stream.id.clone(), err));
continue;
break; // Identical to continuing the outer loop
}
debug_assert!(!buffer.is_null());
@ -566,9 +566,20 @@ impl EventLoop {
SampleFormat::I16 => capture_callback!(i16, I16),
SampleFormat::U16 => capture_callback!(u16, U16),
}
}
},
AudioClientFlow::Render { render_client } => {
// The number of frames available for writing.
let frames_available = match get_available_frames(stream) {
Ok(0) => continue, // TODO: Can this happen?
Ok(n) => n,
Err(err) => {
streams_to_remove.push((stream.id.clone(), err));
continue;
}
};
let mut buffer: *mut BYTE = mem::uninitialized();
let hresult = (*render_client).GetBuffer(
frames_available,