export onnx

cosyvoice/bin/export_onnx.py

@@ -0,0 +1,228 @@
+# Copyright (c) 2024 Antgroup Inc (authors: Zhoubofan, [email protected])
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import argparse
+import logging
+import os
+import sys
+
+logging.getLogger('matplotlib').setLevel(logging.WARNING)
+import onnxruntime as ort
+import numpy as np
+
+# try:
+#     import tensorrt
+#     import tensorrt as trt
+# except ImportError:
+#     error_msg_zh = [
+#         "step.1 下载 tensorrt .tar.gz 压缩包并解压，下载地址: https://developer.nvidia.com/tensorrt/download/10x",
+#         "step.2 使用 tensorrt whl 包进行安装根据 python 版本对应进行安装，如 pip install ${TensorRT-Path}/python/tensorrt-10.2.0-cp38-none-linux_x86_64.whl",
+#         "step.3 将 tensorrt 的 lib 路径添加进环境变量中，export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:${TensorRT-Path}/lib/"
+#     ]
+#     print("\n".join(error_msg_zh))
+#     sys.exit(1)
+
+import torch
+from cosyvoice.cli.cosyvoice import CosyVoice
+
+
+def calculate_onnx(onnx_file, x, mask, mu, t, spks, cond):
+    providers = ['CUDAExecutionProvider']
+    sess_options = ort.SessionOptions()
+
+    providers = [
+        'CUDAExecutionProvider'
+    ]
+
+    # Load the ONNX model
+    session = ort.InferenceSession(onnx_file, sess_options=sess_options, providers=providers)
+    
+    x_np = x.cpu().numpy()
+    mask_np = mask.cpu().numpy()
+    mu_np = mu.cpu().numpy()
+    t_np = np.array(t.cpu()) 
+    spks_np = spks.cpu().numpy()
+    cond_np = cond.cpu().numpy()
+
+    ort_inputs = {
+        'x': x_np,
+        'mask': mask_np,
+        'mu': mu_np,
+        't': t_np,
+        'spks': spks_np,
+        'cond': cond_np
+    }
+
+    output = session.run(None, ort_inputs)
+
+    return output[0]
+
+# def calculate_tensorrt(trt_file, x, mask, mu, t, spks, cond):
+#     trt.init_libnvinfer_plugins(None, "")
+#     logger = trt.Logger(trt.Logger.WARNING)
+#     runtime = trt.Runtime(logger)
+#     with open(trt_file, 'rb') as f:
+#         serialized_engine = f.read()
+#     engine = runtime.deserialize_cuda_engine(serialized_engine)
+#     context = engine.create_execution_context()
+
+#     bs = x.shape[0]
+#     hs = x.shape[1]
+#     seq_len = x.shape[2]
+
+#     ret = torch.zeros_like(x)
+
+#     # Set input shapes for dynamic dimensions
+#     context.set_input_shape("x", x.shape)
+#     context.set_input_shape("mask", mask.shape)
+#     context.set_input_shape("mu", mu.shape)
+#     context.set_input_shape("t", t.shape)
+#     context.set_input_shape("spks", spks.shape)
+#     context.set_input_shape("cond", cond.shape)
+
+#     # bindings = [x.data_ptr(), mask.data_ptr(), mu.data_ptr(), t.data_ptr(), spks.data_ptr(), cond.data_ptr(), ret.data_ptr()]
+#     # names = ['x', 'mask', 'mu', 't', 'spks', 'cond', 'estimator_out']
+#     #
+#     # for i in range(len(bindings)):
+#     #     context.set_tensor_address(names[i], bindings[i])
+#     #
+#     # handle = torch.cuda.current_stream().cuda_stream
+#     # context.execute_async_v3(stream_handle=handle)
+
+#     # Create a list of bindings
+#     bindings = [int(x.data_ptr()), int(mask.data_ptr()), int(mu.data_ptr()), int(t.data_ptr()), int(spks.data_ptr()), int(cond.data_ptr()), int(ret.data_ptr())]
+
+#     # Execute the inference
+#     context.execute_v2(bindings=bindings)
+
+#     torch.cuda.synchronize()
+
+#     return ret
+
+
+# def test_calculate_value(estimator, onnx_file, trt_file, dummy_input, args):
+#     torch_output = estimator.forward(**dummy_input).cpu().detach().numpy()
+#     onnx_output = calculate_onnx(onnx_file, **dummy_input)
+#     tensorrt_output = calculate_tensorrt(trt_file, **dummy_input).cpu().detach().numpy()
+#     atol = 2e-3  # Absolute tolerance
+#     rtol = 1e-4  # Relative tolerance
+
+#     print(f"args.export_half: {args.export_half}, args.model_dir: {args.model_dir}")
+#     print("$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$")
+
+#     print("torch_output diff with onnx_output: ", )
+#     print(f"compare with atol: {atol}, rtol: {rtol} ", np.allclose(torch_output, onnx_output, atol, rtol))
+#     print(f"max diff value: ", np.max(np.fabs(torch_output - onnx_output)))
+#     print("$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$")
+
+#     print("torch_output diff with tensorrt_output: ")
+#     print(f"compare with atol: {atol}, rtol: {rtol} ", np.allclose(torch_output, tensorrt_output, atol, rtol))
+#     print(f"max diff value: ", np.max(np.fabs(torch_output - tensorrt_output)))
+#     print("$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$")
+
+#     print("onnx_output diff with tensorrt_output: ")
+#     print(f"compare with atol: {atol}, rtol: {rtol} ", np.allclose(onnx_output, tensorrt_output, atol, rtol))
+#     print(f"max diff value: ", np.max(np.fabs(onnx_output - tensorrt_output)))
+#     print("$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$")
+
+
+def get_args():
+    parser = argparse.ArgumentParser(description='Export your model for deployment')
+    parser.add_argument('--model_dir', type=str, default='pretrained_models/CosyVoice-300M', help='Local path to the model directory')
+    parser.add_argument('--export_half', type=str, choices=['True', 'False'], default='False', help='Export with half precision (FP16)')
+    # parser.add_argument('--trt_max_len', type=int, default=8192, help='Export max len')
+    parser.add_argument('--exec_export', type=str, choices=['True', 'False'], default='True', help='Exec export')
+    
+    args = parser.parse_args()
+    args.export_half = args.export_half == 'True'
+    args.exec_export = args.exec_export == 'True'
+    print("$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$")
+    print(args)
+    return args
+
+def main():
+    args = get_args()
+
+    cosyvoice = CosyVoice(args.model_dir, load_jit=False, load_trt=False)
+    estimator = cosyvoice.model.flow.decoder.estimator
+
+    dtype = torch.float32 if not args.export_half else torch.float16
+    device = torch.device("cuda")
+    batch_size = 1
+    seq_len = 256
+    out_channels = cosyvoice.model.flow.decoder.estimator.out_channels
+    x = torch.rand((batch_size, out_channels, seq_len), dtype=dtype, device=device)
+    mask = torch.ones((batch_size, 1, seq_len), dtype=dtype, device=device)
+    mu = torch.rand((batch_size, out_channels, seq_len), dtype=dtype, device=device)
+    t = torch.rand((batch_size, ), dtype=dtype, device=device)
+    spks = torch.rand((batch_size, out_channels), dtype=dtype, device=device)
+    cond = torch.rand((batch_size, out_channels, seq_len), dtype=dtype, device=device)
+
+    onnx_file_name = 'estimator_fp32.onnx' if not args.export_half else 'estimator_fp16.onnx'
+    onnx_file_path = os.path.join(args.model_dir, onnx_file_name)
+    dummy_input = (x, mask, mu, t, spks, cond)
+
+    estimator = estimator.to(dtype)
+
+    if args.exec_export:
+        torch.onnx.export(
+            estimator,
+            dummy_input,
+            onnx_file_path,
+            export_params=True,
+            opset_version=18,
+            do_constant_folding=True,
+            input_names=['x', 'mask', 'mu', 't', 'spks', 'cond'],
+            output_names=['estimator_out'],
+            dynamic_axes={
+                'x': {2: 'seq_len'},
+                'mask': {2: 'seq_len'},
+                'mu': {2: 'seq_len'},
+                'cond': {2: 'seq_len'},
+                'estimator_out': {2: 'seq_len'},
+            }
+        )
+
+    # tensorrt_path = os.environ.get('tensorrt_root_dir')
+    # if not tensorrt_path:
+    #     raise EnvironmentError("Please set the 'tensorrt_root_dir' environment variable.")
+
+    # if not os.path.isdir(tensorrt_path):
+    #     raise FileNotFoundError(f"The directory {tensorrt_path} does not exist.")
+
+    # trt_lib_path = os.path.join(tensorrt_path, "lib")
+    # if trt_lib_path not in os.environ.get('LD_LIBRARY_PATH', ''):
+    #     print(f"Adding TensorRT lib path {trt_lib_path} to LD_LIBRARY_PATH.")
+    #     os.environ['LD_LIBRARY_PATH'] = f"{os.environ.get('LD_LIBRARY_PATH', '')}:{trt_lib_path}"
+
+    # trt_file_name = 'estimator_fp32.plan' if not args.export_half else 'estimator_fp16.plan'
+    # trt_file_path = os.path.join(args.model_dir, trt_file_name)
+
+    # trtexec_bin = os.path.join(tensorrt_path, 'bin/trtexec')
+    # trt_max_len = args.trt_max_len
+    # trtexec_cmd = f"{trtexec_bin} --onnx={onnx_file_path} --saveEngine={trt_file_path} " \
+    #               f"--minShapes=x:1x{out_channels}x1,mask:1x1x1,mu:1x{out_channels}x1,t:1,spks:1x{out_channels},cond:1x{out_channels}x1 " \
+    #               f"--maxShapes=x:1x{out_channels}x{trt_max_len},mask:1x1x{trt_max_len},mu:1x{out_channels}x{trt_max_len},t:1,spks:1x{out_channels},cond:1x{out_channels}x{trt_max_len} " + \
+    #               ("--fp16" if args.export_half else "")
+    
+    # print("execute ", trtexec_cmd)
+
+    # if args.exec_export:
+    #     os.system(trtexec_cmd)
+
+    # dummy_input = {'x': x, 'mask': mask, 'mu': mu, 't': t, 'spks': spks, 'cond': cond}
+    # test_calculate_value(estimator, onnx_file_path, trt_file_path, dummy_input, args)
+
+if __name__ == "__main__":
+    main()

cosyvoice/bin/export_trt.py

@@ -1,126 +0,0 @@
-# Copyright (c) 2024 Antgroup Inc (authors: Zhoubofan, [email protected])
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#   http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-import argparse
-import logging
-import os
-import sys
-
-logging.getLogger('matplotlib').setLevel(logging.WARNING)
-
-try:
-    import tensorrt
-except ImportError:
-    error_msg_zh = [
-        "step.1 下载 tensorrt .tar.gz 压缩包并解压，下载地址: https://developer.nvidia.com/tensorrt/download/10x",
-        "step.2 使用 tensorrt whl 包进行安装根据 python 版本对应进行安装，如 pip install ${TensorRT-Path}/python/tensorrt-10.2.0-cp38-none-linux_x86_64.whl",
-        "step.3 将 tensorrt 的 lib 路径添加进环境变量中，export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:${TensorRT-Path}/lib/"
-    ]
-    print("\n".join(error_msg_zh))
-    sys.exit(1)
-
-import torch
-from cosyvoice.cli.cosyvoice import CosyVoice
-
-def get_args():
-    parser = argparse.ArgumentParser(description='Export your model for deployment')
-    parser.add_argument('--model_dir',
-                        type=str,
-                        default='pretrained_models/CosyVoice-300M-SFT',
-                        help='Local path to the model directory')
-
-    parser.add_argument('--export_half',
-                        action='store_true',
-                        help='Export with half precision (FP16)')
-    
-    args = parser.parse_args()
-    print(args)
-    return args
-
-def main():
-    args = get_args()
-
-    cosyvoice = CosyVoice(args.model_dir, load_jit=False, load_trt=False)
-    estimator = cosyvoice.model.flow.decoder.estimator
-
-    dtype = torch.float32 if not args.export_half else torch.float16
-    device = torch.device("cuda")
-    batch_size = 1
-    seq_len = 256
-    hidden_size = cosyvoice.model.flow.output_size
-    x = torch.rand((batch_size, hidden_size, seq_len), dtype=dtype, device=device)
-    mask = torch.ones((batch_size, 1, seq_len), dtype=dtype, device=device)
-    mu = torch.rand((batch_size, hidden_size, seq_len), dtype=dtype, device=device)
-    t = torch.rand((batch_size, ), dtype=dtype, device=device)
-    spks = torch.rand((batch_size, hidden_size), dtype=dtype, device=device)
-    cond = torch.rand((batch_size, hidden_size, seq_len), dtype=dtype, device=device)
-
-    onnx_file_name = 'estimator_fp32.onnx' if not args.export_half else 'estimator_fp16.onnx'
-    onnx_file_path = os.path.join(args.model_dir, onnx_file_name)
-    dummy_input = (x, mask, mu, t, spks, cond)
-
-    estimator = estimator.to(dtype)
-
-    torch.onnx.export(
-        estimator,
-        dummy_input,
-        onnx_file_path,
-        export_params=True,
-        opset_version=18,
-        do_constant_folding=True,
-        input_names=['x', 'mask', 'mu', 't', 'spks', 'cond'],
-        output_names=['estimator_out'],
-        dynamic_axes={
-            'x': {2: 'seq_len'},
-            'mask': {2: 'seq_len'},
-            'mu': {2: 'seq_len'},
-            'cond': {2: 'seq_len'},
-            'estimator_out': {2: 'seq_len'},
-        }
-    )
-
-    tensorrt_path = os.environ.get('tensorrt_root_dir')
-    if not tensorrt_path:
-        raise EnvironmentError("Please set the 'tensorrt_root_dir' environment variable.")
-
-    if not os.path.isdir(tensorrt_path):
-        raise FileNotFoundError(f"The directory {tensorrt_path} does not exist.")
-
-    trt_lib_path = os.path.join(tensorrt_path, "lib")
-    if trt_lib_path not in os.environ.get('LD_LIBRARY_PATH', ''):
-        print(f"Adding TensorRT lib path {trt_lib_path} to LD_LIBRARY_PATH.")
-        os.environ['LD_LIBRARY_PATH'] = f"{os.environ.get('LD_LIBRARY_PATH', '')}:{trt_lib_path}"
-
-    trt_file_name = 'estimator_fp32.plan' if not args.export_half else 'estimator_fp16.plan'
-    trt_file_path = os.path.join(args.model_dir, trt_file_name)
-
-    trtexec_bin = os.path.join(tensorrt_path, 'bin/trtexec')
-    trtexec_cmd = f"{trtexec_bin} --onnx={onnx_file_path} --saveEngine={trt_file_path} " \
-                  "--minShapes=x:1x80x1,mask:1x1x1,mu:1x80x1,t:1,spks:1x80,cond:1x80x1 " \
-                  "--maxShapes=x:1x80x4096,mask:1x1x4096,mu:1x80x4096,t:1,spks:1x80,cond:1x80x4096 --verbose " + \
-                  ("--fp16" if args.export_half else "")
-    
-    print("execute ", trtexec_cmd)
-
-    os.system(trtexec_cmd)
-
-    # print("x.shape", x.shape)
-    # print("mask.shape", mask.shape)
-    # print("mu.shape", mu.shape)
-    # print("t.shape", t.shape)
-    # print("spks.shape", spks.shape)
-    # print("cond.shape", cond.shape)
-
-if __name__ == "__main__":
-    main()

cosyvoice/cli/cosyvoice.py

@@ -21,7 +21,7 @@ from cosyvoice.utils.file_utils import logging
 
 class CosyVoice:
 
-    def __init__(self, model_dir, load_jit=True, load_trt=True, use_fp16=False):
+    def __init__(self, model_dir, load_jit=True, load_trt=False, load_onnx=True, use_fp16=False):
         instruct = True if '-Instruct' in model_dir else False
         self.model_dir = model_dir
         if not os.path.exists(model_dir):
@@ -39,13 +39,16 @@ class CosyVoice:
         self.model.load('{}/llm.pt'.format(model_dir),
                         '{}/flow.pt'.format(model_dir),
                         '{}/hift.pt'.format(model_dir))
-                        
+
         if load_jit:
             self.model.load_jit('{}/llm.text_encoder.fp16.zip'.format(model_dir),
                                     '{}/llm.llm.fp16.zip'.format(model_dir))
 
-        if load_trt:
-            self.model.load_trt(model_dir, use_fp16)
+        # if load_trt:
+        #     self.model.load_trt(model_dir, use_fp16)
+        
+        if load_onnx:
+            self.model.load_onnx(model_dir, use_fp16)
             
         del configs
 

cosyvoice/cli/model.py

@@ -19,6 +19,13 @@ import time
 from contextlib import nullcontext
 import uuid
 from cosyvoice.utils.common import fade_in_out
+import numpy as np
+import onnxruntime as ort
+
+# try:
+#     import tensorrt as trt
+# except ImportError:
+#     ...
 
 class CosyVoiceModel:
 
@@ -66,21 +73,40 @@ class CosyVoiceModel:
         llm_llm = torch.jit.load(llm_llm_model)
         self.llm.llm = llm_llm
 
-    def load_trt(self, model_dir, use_fp16):
-        import tensorrt as trt
-        trt_file_name = 'estimator_fp16.plan' if use_fp16 else 'estimator_fp32.plan'
-        trt_file_path = os.path.join(model_dir, trt_file_name)
-        if not os.path.isfile(trt_file_path):
-            raise f"{trt_file_path} does not exist. Please use bin/export_trt.py to generate .plan file"
+    # def load_trt(self, model_dir, use_fp16):
+    #     trt_file_name = 'estimator_fp16.plan' if use_fp16 else 'estimator_fp32.plan'
+    #     trt_file_path = os.path.join(model_dir, trt_file_name)
+    #     if not os.path.isfile(trt_file_path):
+    #         raise f"{trt_file_path} does not exist. Please use bin/export_trt.py to generate .plan file"
+
+    #     trt.init_libnvinfer_plugins(None, "")
+    #     logger = trt.Logger(trt.Logger.WARNING)
+    #     runtime = trt.Runtime(logger)
+    #     with open(trt_file_path, 'rb') as f:
+    #         serialized_engine = f.read()
+    #     engine = runtime.deserialize_cuda_engine(serialized_engine)
+    #     self.flow.decoder.estimator_context = engine.create_execution_context()
+    #     self.flow.decoder.estimator = None
+    
+    def load_onnx(self, model_dir, use_fp16):
+        onnx_file_name = 'estimator_fp16.onnx' if use_fp16 else 'estimator_fp32.onnx'
+        onnx_file_path = os.path.join(model_dir, onnx_file_name)
+        if not os.path.isfile(onnx_file_path):
+            raise f"{onnx_file_path} does not exist. Please use bin/export_trt.py to generate .onnx file"
+        
+        providers = ['CUDAExecutionProvider']
+        sess_options = ort.SessionOptions()
+
+        # Add TensorRT Execution Provider
+        providers = [
+            'CUDAExecutionProvider'
+        ]
 
-        trt.init_libnvinfer_plugins(None, "")
-        logger = trt.Logger(trt.Logger.WARNING)
-        runtime = trt.Runtime(logger)
-        with open(trt_file_path, 'rb') as f:
-            serialized_engine = f.read()
-        engine = runtime.deserialize_cuda_engine(serialized_engine)
-        self.flow.decoder.estimator_context = engine.create_execution_context()
+        # Load the ONNX model
+        self.flow.decoder.session = ort.InferenceSession(onnx_file_path, sess_options=sess_options, providers=providers)
+        # self.flow.decoder.estimator_context = None
         self.flow.decoder.estimator = None
+        
 
     def llm_job(self, text, prompt_text, llm_prompt_speech_token, llm_embedding, uuid):
         with self.llm_context:

cosyvoice/flow/flow_matching.py

@@ -14,6 +14,8 @@
 import torch
 import torch.nn.functional as F
 from matcha.models.components.flow_matching import BASECFM
+import onnxruntime as ort
+import numpy as np
 
 class ConditionalCFM(BASECFM):
     def __init__(self, in_channels, cfm_params, n_spks=1, spk_emb_dim=64, estimator: torch.nn.Module = None):
@@ -29,6 +31,8 @@ class ConditionalCFM(BASECFM):
         in_channels = in_channels + (spk_emb_dim if n_spks > 0 else 0)
         # Just change the architecture of the estimator here
         self.estimator = estimator
+        self.estimator_context = None # for tensorrt
+        self.session = None # for onnx
 
     @torch.inference_mode()
     def forward(self, mu, mask, n_timesteps, temperature=1.0, spks=None, cond=None):
@@ -101,28 +105,47 @@ class ConditionalCFM(BASECFM):
 
         if self.estimator is not None:
             return self.estimator.forward(x, mask, mu, t, spks, cond)
+        # elif self.estimator_context is not None:
+        #     assert self.training is False, 'tensorrt cannot be used in training'
+        #     bs = x.shape[0]
+        #     hs = x.shape[1]
+        #     seq_len = x.shape[2]
+        #     # assert bs == 1 and hs == 80
+        #     ret = torch.empty_like(x)
+        #     self.estimator_context.set_input_shape("x", x.shape)
+        #     self.estimator_context.set_input_shape("mask", mask.shape)
+        #     self.estimator_context.set_input_shape("mu", mu.shape)
+        #     self.estimator_context.set_input_shape("t", t.shape)
+        #     self.estimator_context.set_input_shape("spks", spks.shape)
+        #     self.estimator_context.set_input_shape("cond", cond.shape)
+
+        #     # Create a list of bindings
+        #     bindings = [int(x.data_ptr()), int(mask.data_ptr()), int(mu.data_ptr()), int(t.data_ptr()), int(spks.data_ptr()), int(cond.data_ptr()), int(ret.data_ptr())]
+
+        #     # Execute the inference
+        #     self.estimator_context.execute_v2(bindings=bindings)
+        #     return ret
         else:
-            assert self.training is False, 'tensorrt cannot be used in training'
-            bs = x.shape[0]
-            hs = x.shape[1]
-            seq_len = x.shape[2]
-            # assert bs == 1 and hs == 80
-            ret = torch.empty_like(x)
-            self.estimator_context.set_input_shape("x", x.shape)
-            self.estimator_context.set_input_shape("mask", mask.shape)
-            self.estimator_context.set_input_shape("mu", mu.shape)
-            self.estimator_context.set_input_shape("t", t.shape)
-            self.estimator_context.set_input_shape("spks", spks.shape)
-            self.estimator_context.set_input_shape("cond", cond.shape)
-            bindings = [x.data_ptr(), mask.data_ptr(), mu.data_ptr(), t.data_ptr(), spks.data_ptr(), cond.data_ptr(), ret.data_ptr()]
-            names = ['x', 'mask', 'mu', 't', 'spks', 'cond', 'estimator_out']
-            
-            for i in range(len(bindings)):
-                self.estimator_context.set_tensor_address(names[i], bindings[i])
-
-            handle = torch.cuda.current_stream().cuda_stream
-            self.estimator_context.execute_async_v3(stream_handle=handle)
-            return ret
+            x_np = x.cpu().numpy()
+            mask_np = mask.cpu().numpy()
+            mu_np = mu.cpu().numpy()
+            t_np = t.cpu().numpy()
+            spks_np = spks.cpu().numpy()
+            cond_np = cond.cpu().numpy()
+
+            ort_inputs = {
+                'x': x_np,
+                'mask': mask_np,
+                'mu': mu_np,
+                't': t_np,
+                'spks': spks_np,
+                'cond': cond_np
+            }
+
+            output = self.session.run(None, ort_inputs)[0]
+
+            return torch.tensor(output, dtype=x.dtype, device=x.device)
+
 
     def compute_loss(self, x1, mask, mu, spks=None, cond=None):
         """Computes diffusion loss