[cm] Adding music gen example

examples/neutone_gen/example_music_gen.py

@@ -0,0 +1,142 @@
+import logging
+import os
+from typing import Dict, List
+
+import torch as tr
+from torch import Tensor
+
+from neutone_sdk import NeutoneParameter, TextNeutoneParameter, \
+    CategoricalNeutoneParameter
+from neutone_sdk.non_realtime_wrapper import NonRealtimeBase
+
+logging.basicConfig()
+log = logging.getLogger(__name__)
+log.setLevel(level=os.environ.get("LOGLEVEL", "INFO"))
+
+
+class MusicGenModelWrapper(NonRealtimeBase):
+    def get_model_name(self) -> str:
+        return "MusicGen.example"
+
+    def get_model_authors(self) -> List[str]:
+        return ["Naotake Masuda"]
+
+    def get_model_short_description(self) -> str:
+        return "MusicGen model."
+
+    def get_model_long_description(self) -> str:
+        return "MusicGen model."
+
+    def get_technical_description(self) -> str:
+        return "MusicGen model."
+
+    def get_technical_links(self) -> Dict[str, str]:
+        return {
+            "Paper": "https://arxiv.org/abs/2306.05284",
+            "Code": "https://github.com/facebookresearch/audiocraft/"
+        }
+
+    def get_tags(self) -> List[str]:
+        return ["musicgen"]
+
+    def get_model_version(self) -> str:
+        return "1.0.0"
+
+    def is_experimental(self) -> bool:
+        return False
+
+    def get_neutone_parameters(self) -> List[NeutoneParameter]:
+        return [
+            TextNeutoneParameter(name="prompt",
+                                 description="text prompt for generation",
+                                 max_n_chars=256,
+                                 default_value="techno kick drum"),
+            CategoricalNeutoneParameter(name="duration",
+                                        description="how many seconds to generate",
+                                        n_values=8,
+                                        default_value=0,
+                                        labels=[str(idx) for idx in range(1, 9)]),
+        ]
+
+    @tr.jit.export
+    def get_audio_in_channels(self) -> List[int]:
+        return []  # Does not take audio input
+
+    @tr.jit.export
+    def get_audio_out_channels(self) -> List[int]:
+        return [1]  # Mono output
+
+    @tr.jit.export
+    def get_native_sample_rates(self) -> List[int]:
+        return [32000]
+
+    @tr.jit.export
+    def get_native_buffer_sizes(self) -> List[int]:
+        return []  # One-shot model so buffer size does not matter
+
+    @tr.jit.export
+    def is_one_shot_model(self) -> bool:
+        return True
+
+    def do_forward_pass(self,
+                        curr_block_idx: int,
+                        audio_in: List[Tensor],
+                        knob_params: Dict[str, Tensor],
+                        text_params: List[str]) -> List[Tensor]:
+        # The extra cast to int is needed for TorchScript
+        n_seconds = int(knob_params["duration"].item()) + 1
+        # Convert duration to number of tokens
+        n_tokens = (n_seconds * 50) + 4
+        if self.use_debug_mode:
+            assert len(text_params) == 1
+            # TorchScript does not support logging statements
+            print("Preprocessing...")
+        # Preprocess
+        input_ids, encoder_outputs, delay_pattern_mask, encoder_attention_mask = (
+            self.model.preprocess(text_params, n_tokens)
+        )
+        # Generate
+        for idx in range(n_tokens - 1):
+            if self.should_cancel_forward_pass():
+                return []
+            input_ids = self.model.sample_step(input_ids,
+                                               encoder_outputs,
+                                               delay_pattern_mask,
+                                               encoder_attention_mask)
+            percentage_progress = int((idx + 1) / n_tokens * 100)
+            self.set_progress_percentage(percentage_progress)
+            if self.use_debug_mode:
+                # TorchScript does not support logging statements
+                print(f"Generating token {idx + 1}/{n_tokens}...")
+                print(f"Progress: {self.get_progress_percentage()}%")
+        if self.use_debug_mode:
+            # TorchScript does not support logging statements
+            print("Postprocessing...")
+        # Postprocess
+        audio_out = self.model.postprocess(input_ids, delay_pattern_mask, text_params)
+        # Remove batch dimension
+        audio_out = audio_out.squeeze(0)
+        return [audio_out]
+
+
+if __name__ == "__main__":
+    import torchtext  # This is needed for loading the TorchScript model
+    # model_path = "../../out/musicgen.ts"
+    model_path = "/Users/puntland/local_christhetree/qosmo/neutone_sdk/out/musicgen.ts"
+    model = tr.jit.load(model_path)
+    wrapper = MusicGenModelWrapper(model)
+
+    # TODO(cm): write export method for nonrealtime models
+    # wrapper.prepare_for_inference()
+    ts = tr.jit.script(wrapper)
+
+    audio_out = wrapper.forward(curr_block_idx=0,
+                                audio_in=[],
+                                numerical_params=tr.tensor([0.0]).unsqueeze(1),
+                                text_params=["testing"])
+    log.info(audio_out[0].shape)
+    audio_out = ts.forward(curr_block_idx=0,
+                           audio_in=[],
+                           numerical_params=tr.tensor([0.0]).unsqueeze(1),
+                           text_params=["testing"])
+    log.info(audio_out[0].shape)