Preliminary support for whisper v3. (#1294)

* Preliminary support for whisper v3.

* Add the missing files.

candle-examples/examples/whisper/main.rs

@@ -345,7 +345,7 @@ enum Task {
     Translate,
 }
 
-#[derive(Clone, Copy, Debug, ValueEnum)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, ValueEnum)]
 enum WhichModel {
     Tiny,
     #[value(name = "tiny.en")]
@@ -361,6 +361,7 @@ enum WhichModel {
     MediumEn,
     Large,
     LargeV2,
+    LargeV3,
     #[value(name = "distil-medium.en")]
     DistilMediumEn,
     #[value(name = "distil-large-v2")]
@@ -376,6 +377,7 @@ impl WhichModel {
             | Self::Medium
             | Self::Large
             | Self::LargeV2
+            | Self::LargeV3
             | Self::DistilLargeV2 => true,
             Self::TinyEn | Self::BaseEn | Self::SmallEn | Self::MediumEn | Self::DistilMediumEn => {
                 false
@@ -395,6 +397,7 @@ impl WhichModel {
             Self::MediumEn => ("openai/whisper-medium.en", "main"),
             Self::Large => ("openai/whisper-large", "refs/pr/36"),
             Self::LargeV2 => ("openai/whisper-large-v2", "refs/pr/57"),
+            Self::LargeV3 => ("openai/whisper-large-v3", "main"),
             Self::DistilMediumEn => ("distil-whisper/distil-medium.en", "main"),
             Self::DistilLargeV2 => ("distil-whisper/distil-large-v2", "main"),
         }
@@ -508,14 +511,18 @@ fn main() -> Result<()> {
                 repo.get(&format!("model-{ext}-q80.gguf"))?,
             )
         } else {
-            (
-                repo.get("config.json")?,
-                repo.get("tokenizer.json")?,
-                repo.get("model.safetensors")?,
-            )
+            let config = repo.get("config.json")?;
+            let tokenizer = if args.model == WhichModel::LargeV3 {
+                panic!("openai/whisper-large-v3 does not provide a compatible tokenizer.json config at the moment")
+            } else {
+                repo.get("tokenizer.json")?
+            };
+            let model = repo.get("model.safetensors")?;
+            (config, tokenizer, model)
         };
         (config, tokenizer, model, sample)
     };
+    let config: Config = serde_json::from_str(&std::fs::read_to_string(config_filename)?)?;
     let tokenizer = Tokenizer::from_file(tokenizer_filename).map_err(E::msg)?;
 
     let mel_bytes = include_bytes!("melfilters.bytes");
@@ -534,12 +541,15 @@ fn main() -> Result<()> {
         .map(|v| *v as f32 / 32768.)
         .collect();
     println!("pcm data loaded {}", pcm_data.len());
-    let mel = audio::pcm_to_mel(&pcm_data, &mel_filters);
+    let mel = audio::pcm_to_mel(&config, &pcm_data, &mel_filters);
     let mel_len = mel.len();
-    let mel = Tensor::from_vec(mel, (1, m::N_MELS, mel_len / m::N_MELS), &device)?;
+    let mel = Tensor::from_vec(
+        mel,
+        (1, config.num_mel_bins, mel_len / config.num_mel_bins),
+        &device,
+    )?;
     println!("loaded mel: {:?}", mel.dims());
 
-    let config: Config = serde_json::from_str(&std::fs::read_to_string(config_filename)?)?;
     let mut model = if args.quantized {
         let vb =
             candle_transformers::quantized_var_builder::VarBuilder::from_gguf(&weights_filename)?;

candle-transformers/src/models/whisper/audio.rs

@@ -198,13 +198,17 @@ fn log_mel_spectrogram_<T: Float + std::fmt::Display>(
     mel
 }
 
-pub fn pcm_to_mel<T: Float + std::fmt::Display>(samples: &[T], filters: &[T]) -> Vec<T> {
+pub fn pcm_to_mel<T: Float + std::fmt::Display>(
+    cfg: &super::Config,
+    samples: &[T],
+    filters: &[T],
+) -> Vec<T> {
     log_mel_spectrogram_(
         samples,
         filters,
         super::N_FFT,
         super::HOP_LENGTH,
-        super::N_MELS,
+        cfg.num_mel_bins,
         false,
     )
 }

candle-transformers/src/models/whisper/mod.rs

@@ -18,6 +18,7 @@ pub struct Config {
     // pub n_text_state: usize,
     pub decoder_attention_heads: usize, // n_text_head
     pub decoder_layers: usize,          // n_text_layer
+    #[serde(default)]
     pub suppress_tokens: Vec<u32>,
 }
 
@@ -26,7 +27,6 @@ pub const DTYPE: candle::DType = candle::DType::F32;
 // Audio parameters.
 pub const SAMPLE_RATE: usize = 16000;
 pub const N_FFT: usize = 400;
-pub const N_MELS: usize = 80;
 pub const HOP_LENGTH: usize = 160;
 pub const CHUNK_LENGTH: usize = 30;
 pub const N_SAMPLES: usize = CHUNK_LENGTH * SAMPLE_RATE; // 480000 samples in a 30-second chunk

candle-wasm-examples/whisper/src/audio.rs

@@ -200,6 +200,7 @@ fn log_mel_spectrogram_<T: Float + std::fmt::Display>(
 }
 
 pub fn pcm_to_mel<T: Float + std::fmt::Display>(
+    cfg: &worker::m::Config,
     samples: &[T],
     filters: &[T],
 ) -> anyhow::Result<Vec<T>> {
@@ -208,7 +209,7 @@ pub fn pcm_to_mel<T: Float + std::fmt::Display>(
         filters,
         worker::m::N_FFT,
         worker::m::HOP_LENGTH,
-        worker::m::N_MELS,
+        cfg.num_mel_bins,
         false,
     );
     Ok(mel)

candle-wasm-examples/whisper/src/worker.rs

@@ -349,9 +349,10 @@ impl Decoder {
             .map(|v| *v as f32 / 32768.)
             .collect();
         console_log!("pcm data loaded {}", pcm_data.len());
-        let mel = crate::audio::pcm_to_mel(&pcm_data, &self.mel_filters)?;
+        let mel = crate::audio::pcm_to_mel(self.model.config(), &pcm_data, &self.mel_filters)?;
         let mel_len = mel.len();
-        let mel = Tensor::from_vec(mel, (1, m::N_MELS, mel_len / m::N_MELS), &device)?;
+        let n_mels = self.model.config().num_mel_bins;
+        let mel = Tensor::from_vec(mel, (1, n_mels, mel_len / n_mels), &device)?;
         console_log!("loaded mel: {:?}", mel.dims());
         let segments = self.run(&mel)?;
         Ok(segments)