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fix audio encode

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Signed-off-by: 21pages <pages21@163.com>
This commit is contained in:
21pages 2023-04-13 20:23:30 +08:00
parent 1280b7beb4
commit 9eaf745f18
1 changed files with 26 additions and 24 deletions
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50
src/server/audio_service.rs
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@ -109,6 +109,7 @@ mod cpal_impl {
lazy_static::lazy_static! {
static ref HOST: Host = cpal::default_host();
static ref INPUT_BUFFER: Arc<Mutex<std::collections::VecDeque<f32>>> = Default::default();
}
#[derive(Default)]
@ -242,18 +243,31 @@ mod cpal_impl {
LowDelay,
)?;
let channels = config.channels();
// https://www.opus-codec.org/docs/html_api/group__opusencoder.html#gace941e4ef26ed844879fde342ffbe546
// https://chromium.googlesource.com/chromium/deps/opus/+/1.1.1/include/opus.h
let encode_len = sample_rate as usize * channels as usize / 100; // 10 ms
INPUT_BUFFER.lock().unwrap().clear();
let mut send_input_stream = move || {
let mut lock = INPUT_BUFFER.lock().unwrap();
while lock.len() >= encode_len {
let frame: Vec<f32> = lock.drain(0..encode_len).collect();
send(
&frame,
sample_rate_0,
sample_rate,
channels,
&mut encoder,
&sp,
);
}
};
let stream = match config.sample_format() {
cpal::SampleFormat::F32 => device.build_input_stream(
&config.into(),
move |data, _: &_| {
send(
data,
sample_rate_0,
sample_rate,
channels,
&mut encoder,
&sp,
);
INPUT_BUFFER.lock().unwrap().extend(data);
send_input_stream();
},
err_fn,
)?,
@ -261,14 +275,8 @@ mod cpal_impl {
&config.into(),
move |data: &[i16], _: &_| {
let buffer: Vec<_> = data.iter().map(|s| cpal::Sample::to_f32(s)).collect();
send(
&buffer,
sample_rate_0,
sample_rate,
channels,
&mut encoder,
&sp,
);
INPUT_BUFFER.lock().unwrap().extend(buffer);
send_input_stream();
},
err_fn,
)?,
@ -276,14 +284,8 @@ mod cpal_impl {
&config.into(),
move |data: &[u16], _: &_| {
let buffer: Vec<_> = data.iter().map(|s| cpal::Sample::to_f32(s)).collect();
send(
&buffer,
sample_rate_0,
sample_rate,
channels,
&mut encoder,
&sp,
);
INPUT_BUFFER.lock().unwrap().extend(buffer);
send_input_stream();
},
err_fn,
)?,