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Actually store the period_size

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sniperrifle2004 2020-06-17 03:53:20 +02:00
parent 82e54dfaba
commit 1e5d98b8fd
1 changed files with 2 additions and 2 deletions
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4
playback/src/audio_backend/alsa.rs
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@ -35,7 +35,7 @@ fn list_outputs() {
fn open_device(dev_name: &str) -> Result<(PCM, Frames), Box<Error>> { fn open_device(dev_name: &str) -> Result<(PCM, Frames), Box<Error>> {
let pcm = PCM::new(dev_name, Direction::Playback, false)?; let pcm = PCM::new(dev_name, Direction::Playback, false)?;
let period_size = PREFERED_PERIOD_SIZE; let mut period_size = PREFERED_PERIOD_SIZE;
// http://www.linuxjournal.com/article/6735?page=0,1#N0x19ab2890.0x19ba78d8 // http://www.linuxjournal.com/article/6735?page=0,1#N0x19ab2890.0x19ba78d8
// latency = period_size * periods / (rate * bytes_per_frame) // latency = period_size * periods / (rate * bytes_per_frame)
// For 16 Bit stereo data, one frame has a length of four bytes. // For 16 Bit stereo data, one frame has a length of four bytes.
@ -50,7 +50,7 @@ fn open_device(dev_name: &str) -> Result<(PCM, Frames), Box<Error>> {
hwp.set_format(Format::s16())?; hwp.set_format(Format::s16())?;
hwp.set_rate(44100, ValueOr::Nearest)?; hwp.set_rate(44100, ValueOr::Nearest)?;
hwp.set_channels(2)?; hwp.set_channels(2)?;
let period_size = hwp.set_period_size_near(period_size, ValueOr::Greater)?; period_size = hwp.set_period_size_near(period_size, ValueOr::Greater)?;
hwp.set_buffer_size_near(period_size * BUFFERED_PERIODS)?; hwp.set_buffer_size_near(period_size * BUFFERED_PERIODS)?;
pcm.hw_params(&hwp)?; pcm.hw_params(&hwp)?;