Merge pull request #860 from JasonLG1979/simplify-buffer-resizing

Simplify Alsa buffer resizing

Author: roderickvd

playback/src/audio_backend/alsa.rs

@@ -7,7 +7,6 @@ use alsa::device_name::HintIter;
 use alsa::pcm::{Access, Format, HwParams, PCM};
 use alsa::{Direction, ValueOr};
 use std::cmp::min;
-use std::cmp::Ordering;
 use std::process::exit;
 use std::time::Duration;
 use thiserror::Error;
@@ -226,16 +225,8 @@ impl Sink for AlsaSink {
             let (pcm, bytes_per_period) = open_device(&self.device, self.format)?;
             self.pcm = Some(pcm);
 
-            match self.period_buffer.capacity().cmp(&bytes_per_period) {
-                Ordering::Greater => {
-                    self.period_buffer.truncate(bytes_per_period);
-                    self.period_buffer.shrink_to_fit();
-                }
-                Ordering::Less => {
-                    let extra = bytes_per_period - self.period_buffer.len();
-                    self.period_buffer.reserve_exact(extra);
-                }
-                Ordering::Equal => (),
+            if self.period_buffer.capacity() != bytes_per_period {
+                self.period_buffer = Vec::with_capacity(bytes_per_period);
             }
 
             // Should always match the "Period Buffer size in bytes: " trace! message.