Added pipeline

pipeline.py

@@ -0,0 +1,113 @@
+import re
+import torch
+import numpy as np
+from transformers import MimiModel, GenerationConfig
+from transformers import Pipeline
+
+class IndriPipeline(Pipeline):
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+
+        self.audio_tokenizer = MimiModel.from_pretrained('kyutai/mimi').to(device=self.device)
+
+        # TODO: Ideally all of this should come from model config
+        self.convert_token = self.tokenizer.encode('[convert]')
+        self.stop_token = self.tokenizer.encode('[stop]')
+        self.text_modality_token = self.tokenizer.encode('[text]')
+        self.acoustic_modality_token = self.tokenizer.encode('[mimi]')
+        self.num_codebooks = 8
+        self.audio_offset = 50257
+
+        self.model.generation_config = GenerationConfig(
+            eos_token_id=self.stop_token,
+            max_length=kwargs.get('max_length', 1024),
+            temperature=kwargs.get('temperature', 0.5),
+            top_k=kwargs.get('top_k', 15),
+            do_sample=kwargs.get('do_sample', True)
+        )
+
+    def _sanitize_parameters(self, **kwargs):
+        task = kwargs.get('task', 'tts')
+        assert task in ['tts', 'asr'], f'Task must be one of tts, asr. You provided: {task}'
+
+        speaker = kwargs.get('speaker', '[spkr_unk]')
+
+        preprocess_kwargs = {
+            'task': task,
+            'speaker': speaker
+        }
+
+        return preprocess_kwargs, {}, {}
+
+    def _prepare_tts_tokens(self, text_tokens, speaker):
+        input_tokens = np.hstack([
+            self.text_modality_token,
+            text_tokens,
+            self.convert_token,
+            self.acoustic_modality_token,
+            self.tokenizer.encode(speaker)
+        ])
+
+        return input_tokens.tolist()
+
+    def _prepare_asr_tokens(self, audio_tokens):
+        pass
+
+    def _sanitize_text(self, text):
+        text = text.lower()
+        text = re.sub(r'\n+', ' ', text)
+        text = re.sub(r'[ \t]+', ' ', text)
+
+        text = re.sub(r'([,\.?])+', r'\1', text)
+
+        return text.strip()
+
+    def _deserialize_tokens(self, tokens, num_codebooks):
+        cb = [tokens[i::num_codebooks] for i in range(num_codebooks)]
+        min_shape = min([c.shape for c in cb])[0]
+        acoustic_tokens = torch.vstack([c[:min_shape] - 2048*i for i, c in enumerate(cb)])
+
+        return acoustic_tokens
+
+    def preprocess(self, inputs, speaker, task):
+        # TODO: Check for batching
+        if task == 'tts':
+            input_text = self._sanitize_text(inputs)
+            input_tokens = self.tokenizer.encode(input_text)
+            task_tokens = self._prepare_tts_tokens(input_tokens, speaker)
+            task_tokens = torch.tensor(task_tokens).unsqueeze(0)
+
+        elif task == 'asr':
+            raise ValueError('ASR task is not yet supported')
+
+        return {'task_tokens': task_tokens}
+
+    def _forward(self, model_inputs, **forward_args):
+
+        outputs = self.model.generate(model_inputs['task_tokens'])
+        audio_tokens = []
+
+        for idx, inputs in enumerate(model_inputs['task_tokens']):
+            truncated = outputs[idx, inputs.shape[-1]:]
+            end = torch.where(truncated == self.stop_token[0])[-1]
+    
+            if end.shape[-1] > 0:
+                end = end[0]
+            else:
+                end = truncated.shape[-1]
+    
+            truncated = truncated[:end]
+            truncated -= self.audio_offset
+            truncated = self._deserialize_tokens(torch.tensor(truncated), self.num_codebooks)
+            audio_tokens.append(truncated)
+
+        audio_tokens = torch.vstack(audio_tokens).unsqueeze(0)
+        audio = self.audio_tokenizer.decode(audio_tokens).audio_values
+
+        return {
+            'audio_tokens': audio_tokens, # (B, num_codebooks, num_samples)
+            'audio': audio # (B, 1, num_audio_samples)
+        }
+
+    def postprocess(self, model_outputs):
+        return model_outputs