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Fix playback in pulseaudio backend (#577)

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* Fix playback in pulseaudio backend

* Add comment regarding safety
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Johannesd3 2021-01-29 03:01:38 +01:00 committed by GitHub
parent efabb03631
commit ed20f357dc
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1 changed files with 5 additions and 1 deletions
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6
playback/src/audio_backend/pulseaudio.rs
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@ -67,7 +67,11 @@ impl Sink for PulseAudioSink {
fn write(&mut self, data: &[i16]) -> io::Result<()> {
if let Some(s) = &self.s {
let d: &[u8] = unsafe { std::mem::transmute(data) };
// SAFETY: An i16 consists of two bytes, so that the given slice can be interpreted
// as a byte array of double length. Each byte pointer is validly aligned, and so
// is the newly created slice.
let d: &[u8] =
unsafe { std::slice::from_raw_parts(data.as_ptr() as *const u8, data.len() * 2) };
match s.write(d) {
Ok(_) => Ok(()),