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rust-whisper
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transcribing results as callbacks

master
Bel LaPointe 2023-11-30 09:58:28 -07:00
parent eea4b75bc8
commit 2391d07994
1 changed files with 26 additions and 21 deletions
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47
src/main.rs
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@ -14,8 +14,8 @@ struct Flags {
#[arg(long, default_value = "8")]
threads: i32,
#[arg(long, default_value = "0.8")]
stream_churn: f32,
#[arg(long, default_value = "1.0")]
stream_retain: f32,
#[arg(long, default_value = "5")]
stream_step: u64,
@ -26,7 +26,7 @@ fn main() {
let flags = Flags::parse();
let w = new_whisper(flags.model, flags.threads).unwrap();
let stream_churn = flags.stream_churn;
let stream_retain = (flags.stream_retain * 16_000.0) as usize;
let stream_step = Duration::new(flags.stream_step, 0);
match flags.wav {
Some(wav) => {
@ -34,12 +34,14 @@ fn main() {
&mut std::fs::File::open(wav).expect("failed to open $WAV"),
).expect("failed to decode $WAV");
assert!(header.channel_count == 1);
assert!(header.sampling_rate == 16000);
assert!(header.sampling_rate == 16_000);
let data16 = data.as_sixteen().expect("wav is not 32bit floats");
let audio_data = &whisper_rs::convert_integer_to_float_audio(&data16);
let result = w.transcribe(&audio_data).unwrap();
println!("{}", result);
w.transcribe(&audio_data,
|result| println!("{}", result),
|err| eprintln!("failed to transcribe wav: {}", err),
);
},
None => {
let mut buffer = vec![];
@ -47,15 +49,18 @@ fn main() {
new_listener().listen(move |data: Vec<f32>| {
data.iter().for_each(|x| buffer.push(*x));
if Instant::now() - last > stream_step {
let result = w.transcribe(&buffer).unwrap();
eprintln!("{}", chrono::Local::now());
println!("{}", result);
w.transcribe(&buffer,
|result| {
eprintln!("{}", chrono::Local::now());
println!("{}", result);
},
|err| eprintln!("failed to transcribe stream: {}", err),
);
let retain = buffer.len() - (buffer.len() as f32 * stream_churn) as usize;
for i in retain..buffer.len() {
buffer[i - retain] = buffer[i]
for i in stream_retain..buffer.len() {
buffer[i - stream_retain] = buffer[i]
}
buffer.truncate(retain);
buffer.truncate(stream_retain);
last = Instant::now();
}
});
@ -79,11 +84,11 @@ fn new_whisper(model_path: String, threads: i32) -> Result<Whisper, String> {
}
impl Whisper {
fn transcribe(&self, data: &Vec<f32>) -> Result<String, String> {
fn transcribe(&self, data: &Vec<f32>, on_success: impl Fn(String), on_error: impl Fn(String)) {
match self._transcribe(&data) {
Ok(result) => Ok(result),
Err(msg) => Err(format!("failed to transcribe: {}", msg)),
}
Ok(result) => on_success(result),
Err(msg) => on_error(format!("failed to transcribe: {}", msg)),
};
}
fn _transcribe(&self, data: &Vec<f32>) -> Result<String, WhisperError> {
@ -121,7 +126,7 @@ fn new_listener() -> Listener {
impl Listener {
fn listen(self, mut cb: impl FnMut(Vec<f32>)) {
let (send, recv) = std::sync::mpsc::sync_channel(5_000_000);
let (send, recv) = std::sync::mpsc::sync_channel(5_000);
thread::spawn(move || { self._listen(send); });
loop {
match recv.recv() {
@ -131,7 +136,7 @@ impl Listener {
}
}
fn _listen(self, ch: std::sync::mpsc::SyncSender<Vec<f32>>) {
fn _listen(self, send: std::sync::mpsc::SyncSender<Vec<f32>>) {
let host = cpal::default_host();
let device = host.default_input_device().unwrap();
let cfg = device.supported_input_configs()
@ -141,7 +146,7 @@ impl Listener {
.unwrap()
.with_max_sample_rate();
let downsample_ratio = cfg.channels() as f32 * (cfg.sample_rate().0 as f32 / 16000.0);
let downsample_ratio = cfg.channels() as f32 * (cfg.sample_rate().0 as f32 / 16_000.0);
let stream = device.build_input_stream(
&cfg.clone().into(),
move |data: &[f32], _: &cpal::InputCallbackInfo| {
@ -153,7 +158,7 @@ impl Listener {
}
downsampled_data.push(data[upsampled as usize]);
}
match ch.send(downsampled_data) {
match send.try_send(downsampled_data) {
Ok(_) => (),
Err(msg) => eprintln!("failed to ingest audio: {}", msg),
};