Pixtral polishing. (#2522)

* Pixtral polishing.

* Clippy fix.

candle-transformers/src/models/pixtral/llava.rs

@@ -48,6 +48,7 @@ pub struct Model {
     pub vision_tower: vision_model::Model,
     pub patch_size: usize,
     pub dtype: candle::DType,
+    pub pos: usize,
 }
 
 impl Model {
@@ -67,6 +68,31 @@ impl Model {
             vision_tower,
             patch_size: cfg.vision_config.patch_size,
             dtype: vb.dtype(),
+            pos: 0,
         })
     }
+
+    pub fn clear_kv_cache(&mut self) {
+        self.language_model.clear_kv_cache();
+        self.pos = 0;
+    }
+
+    pub fn encode_image(&self, image: &Tensor) -> Result<Tensor> {
+        let image_embeds = self.vision_tower.forward(image)?;
+        self.multi_modal_projector.forward(&image_embeds)
+    }
+
+    pub fn lm_forward(&mut self, input_ids: &Tensor) -> Result<Tensor> {
+        let (_, seq_len) = input_ids.dims2()?;
+        let logits = self.language_model.forward(input_ids, self.pos)?;
+        self.pos += seq_len;
+        Ok(logits)
+    }
+
+    pub fn lm_forward_embeds(&mut self, xs: &Tensor) -> Result<Tensor> {
+        let (_, seq_len, _) = xs.dims3()?;
+        let logits = self.language_model.forward_embeds(xs, None, self.pos)?;
+        self.pos += seq_len;
+        Ok(logits)
+    }
 }