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speech_to_text_quant_infer_trt.py
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speech_to_text_quant_infer_trt.py
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# Copyright (c) 2020, NVIDIA CORPORATION. All rights reserved.
#
# 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.
"""
Script for inference ASR models using TensorRT
"""
import collections
import os
import time
from argparse import ArgumentParser
from pprint import pprint
import numpy as np
import pycuda.autoinit
import pycuda.driver as cuda
import tensorrt as trt
import torch
from omegaconf import open_dict
from nemo.collections.asr.metrics.wer import WER, CTCDecoding, CTCDecodingConfig, word_error_rate
from nemo.collections.asr.models import EncDecCTCModel
from nemo.utils import logging
TRT_LOGGER = trt.Logger()
can_gpu = torch.cuda.is_available()
try:
from torch.cuda.amp import autocast
except ImportError:
from contextlib import contextmanager
@contextmanager
def autocast(enabled=None):
yield
def main():
parser = ArgumentParser()
parser.add_argument(
"--asr_model", type=str, default="QuartzNet15x5Base-En", required=True, help="Pass: 'QuartzNet15x5Base-En'",
)
parser.add_argument(
"--asr_onnx",
type=str,
default="./QuartzNet15x5Base-En-max-32.onnx",
help="Pass: 'QuartzNet15x5Base-En-max-32.onnx'",
)
parser.add_argument("--dataset", type=str, required=True, help="path to evaluation data")
parser.add_argument("--batch_size", type=int, default=4)
parser.add_argument(
"--dont_normalize_text",
default=False,
action='store_false',
help="Turn off trasnscript normalization. Recommended for non-English.",
)
parser.add_argument(
"--use_cer", default=False, action='store_true', help="Use Character Error Rate as the evaluation metric"
)
parser.add_argument('--qat', action="store_true", help="Use onnx file exported from QAT tools")
args = parser.parse_args()
torch.set_grad_enabled(False)
if args.asr_model.endswith('.nemo'):
logging.info(f"Using local ASR model from {args.asr_model}")
asr_model_cfg = EncDecCTCModel.restore_from(restore_path=args.asr_model, return_config=True)
with open_dict(asr_model_cfg):
asr_model_cfg.encoder.quantize = True
asr_model = EncDecCTCModel.restore_from(restore_path=args.asr_model, override_config_path=asr_model_cfg)
else:
logging.info(f"Using NGC cloud ASR model {args.asr_model}")
asr_model_cfg = EncDecCTCModel.from_pretrained(model_name=args.asr_model, return_config=True)
with open_dict(asr_model_cfg):
asr_model_cfg.encoder.quantize = True
asr_model = EncDecCTCModel.from_pretrained(model_name=args.asr_model, override_config_path=asr_model_cfg)
asr_model.setup_test_data(
test_data_config={
'sample_rate': 16000,
'manifest_filepath': args.dataset,
'labels': asr_model.decoder.vocabulary,
'batch_size': args.batch_size,
'normalize_transcripts': args.dont_normalize_text,
}
)
asr_model.preprocessor.featurizer.dither = 0.0
asr_model.preprocessor.featurizer.pad_to = 0
if can_gpu:
asr_model = asr_model.cuda()
asr_model.eval()
labels_map = dict([(i, asr_model.decoder.vocabulary[i]) for i in range(len(asr_model.decoder.vocabulary))])
decoding_cfg = CTCDecodingConfig()
char_decoding = CTCDecoding(decoding_cfg, vocabulary=labels_map)
wer = WER(char_decoding, use_cer=args.use_cer)
wer_result = evaluate(asr_model, args.asr_onnx, labels_map, wer, args.qat)
logging.info(f'Got WER of {wer_result}.')
def get_min_max_input_shape(asr_model):
max_shape = (1, 64, 1)
min_shape = (64, 64, 99999)
for test_batch in asr_model.test_dataloader():
test_batch = [x.cuda() for x in test_batch]
processed_signal, processed_signal_length = asr_model.preprocessor(
input_signal=test_batch[0], length=test_batch[1]
)
shape = processed_signal.cpu().numpy().shape
if shape[0] > max_shape[0]:
max_shape = (shape[0], *max_shape[1:])
if shape[0] < min_shape[0]:
min_shape = (shape[0], *min_shape[1:])
if shape[2] > max_shape[2]:
max_shape = (*max_shape[0:2], shape[2])
if shape[2] < min_shape[2]:
min_shape = (*min_shape[0:2], shape[2])
return min_shape, max_shape
def build_trt_engine(asr_model, onnx_path, qat):
trt_engine_path = "{}.trt".format(onnx_path)
if os.path.exists(trt_engine_path):
return trt_engine_path
min_input_shape, max_input_shape = get_min_max_input_shape(asr_model)
workspace_size = 512
with trt.Builder(TRT_LOGGER) as builder:
network_flags = 1 << int(trt.NetworkDefinitionCreationFlag.EXPLICIT_BATCH)
if qat:
network_flags |= 1 << int(trt.NetworkDefinitionCreationFlag.EXPLICIT_PRECISION)
with builder.create_network(flags=network_flags) as network, trt.OnnxParser(
network, TRT_LOGGER
) as parser, builder.create_builder_config() as builder_config:
parser.parse_from_file(onnx_path)
builder_config.max_workspace_size = workspace_size * (1024 * 1024)
if qat:
builder_config.set_flag(trt.BuilderFlag.INT8)
profile = builder.create_optimization_profile()
profile.set_shape("audio_signal", min=min_input_shape, opt=max_input_shape, max=max_input_shape)
builder_config.add_optimization_profile(profile)
engine = builder.build_engine(network, builder_config)
serialized_engine = engine.serialize()
with open(trt_engine_path, "wb") as fout:
fout.write(serialized_engine)
return trt_engine_path
def trt_inference(stream, trt_ctx, d_input, d_output, input_signal, input_signal_length):
print("infer with shape: {}".format(input_signal.shape))
trt_ctx.set_binding_shape(0, input_signal.shape)
assert trt_ctx.all_binding_shapes_specified
h_output = cuda.pagelocked_empty(tuple(trt_ctx.get_binding_shape(1)), dtype=np.float32)
h_input_signal = cuda.register_host_memory(np.ascontiguousarray(input_signal.cpu().numpy().ravel()))
cuda.memcpy_htod_async(d_input, h_input_signal, stream)
trt_ctx.execute_async_v2(bindings=[int(d_input), int(d_output)], stream_handle=stream.handle)
cuda.memcpy_dtoh_async(h_output, d_output, stream)
stream.synchronize()
greedy_predictions = torch.tensor(h_output).argmax(dim=-1, keepdim=False)
return greedy_predictions
def evaluate(asr_model, asr_onnx, labels_map, wer, qat):
# Eval the model
hypotheses = []
references = []
stream = cuda.Stream()
vocabulary_size = len(labels_map) + 1
engine_file_path = build_trt_engine(asr_model, asr_onnx, qat)
with open(engine_file_path, 'rb') as f, trt.Runtime(TRT_LOGGER) as runtime:
trt_engine = runtime.deserialize_cuda_engine(f.read())
trt_ctx = trt_engine.create_execution_context()
profile_shape = trt_engine.get_profile_shape(profile_index=0, binding=0)
print("profile shape min:{}, opt:{}, max:{}".format(profile_shape[0], profile_shape[1], profile_shape[2]))
max_input_shape = profile_shape[2]
input_nbytes = trt.volume(max_input_shape) * trt.float32.itemsize
d_input = cuda.mem_alloc(input_nbytes)
max_output_shape = [max_input_shape[0], vocabulary_size, (max_input_shape[-1] + 1) // 2]
output_nbytes = trt.volume(max_output_shape) * trt.float32.itemsize
d_output = cuda.mem_alloc(output_nbytes)
for test_batch in asr_model.test_dataloader():
if can_gpu:
test_batch = [x.cuda() for x in test_batch]
processed_signal, processed_signal_length = asr_model.preprocessor(
input_signal=test_batch[0], length=test_batch[1]
)
greedy_predictions = trt_inference(
stream,
trt_ctx,
d_input,
d_output,
input_signal=processed_signal,
input_signal_length=processed_signal_length,
)
hypotheses += wer.decoding.ctc_decoder_predictions_tensor(greedy_predictions)[0]
for batch_ind in range(greedy_predictions.shape[0]):
seq_len = test_batch[3][batch_ind].cpu().detach().numpy()
seq_ids = test_batch[2][batch_ind].cpu().detach().numpy()
reference = ''.join([labels_map[c] for c in seq_ids[0:seq_len]])
references.append(reference)
del test_batch
wer_value = word_error_rate(hypotheses=hypotheses, references=references, use_cer=wer.use_cer)
return wer_value
if __name__ == '__main__':
main() # noqa pylint: disable=no-value-for-parameter