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optimize audio

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This commit is contained in:
csf
2021-12-28 22:36:43 +08:00
committed by csf-surface
parent 66e39b62a2
commit f69f6bc8d4
3 changed files with 40 additions and 24 deletions
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49
src/server/audio_service.rs
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@@ -115,9 +115,6 @@ mod cpal_impl {
encoder: &mut Encoder,
sp: &GenericService,
) {
if data.iter().filter(|x| **x != 0.).next().is_none() {
return;
}
let buffer;
let data = if sample_rate0 != sample_rate {
buffer = crate::common::resample_channels(data, sample_rate0, sample_rate, channels);
@@ -194,7 +191,6 @@ mod cpal_impl {
log::error!("an error occurred on stream: {}", err);
};
// Sample rate must be one of 8000, 12000, 16000, 24000, or 48000.
// Note: somehow 48000 not work
let sample_rate_0 = config.sample_rate().0;
let sample_rate = if sample_rate_0 < 12000 {
8000
@@ -202,9 +198,12 @@ mod cpal_impl {
12000
} else if sample_rate_0 < 24000 {
16000
} else {
} else if sample_rate_0 < 48000 {
24000
} else {
48000
};
log::debug!("Audio sample rate : {}",sample_rate);
let mut encoder = Encoder::new(
sample_rate,
if config.channels() > 1 { Stereo } else { Mono },
@@ -278,19 +277,39 @@ fn create_format_msg(sample_rate: u32, channels: u16) -> Message {
msg
}
// use AUDIO_ZERO_COUNT for the Noise(Zero) Gate Attack Time
// every audio data length is set to 480
// MAX_AUDIO_ZERO_COUNT=800 is similar as Gate Attack Time 3~5s(Linux) || 6~8s(Windows)
const MAX_AUDIO_ZERO_COUNT: u16 = 800;
static mut AUDIO_ZERO_COUNT: u16 = 0;
fn send_f32(data: &[f32], encoder: &mut Encoder, sp: &GenericService) {
if data.iter().filter(|x| **x != 0.).next().is_some() {
match encoder.encode_vec_float(data, data.len() * 6) {
Ok(data) => {
let mut msg_out = Message::new();
msg_out.set_audio_frame(AudioFrame {
data,
..Default::default()
});
sp.send(msg_out);
}
Err(_) => {}
unsafe {
AUDIO_ZERO_COUNT = 0;
}
} else {
unsafe {
if AUDIO_ZERO_COUNT > MAX_AUDIO_ZERO_COUNT {
if AUDIO_ZERO_COUNT == MAX_AUDIO_ZERO_COUNT + 1 {
log::debug!("Audio Zero Gate Attack");
AUDIO_ZERO_COUNT += 1;
}
return;
}
AUDIO_ZERO_COUNT += 1;
}
}
match encoder.encode_vec_float(data, data.len() * 6) {
Ok(data) => {
let mut msg_out = Message::new();
msg_out.set_audio_frame(AudioFrame {
data,
..Default::default()
});
sp.send(msg_out);
}
Err(_) => {}
}
}