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Fangjun Kuang
Committed by GitHub
5e2dc5ce 1 parent d7114da4

add streaming-server with web client (#164) 

* add streaming-server with web client

* small fixes
内嵌 并排对比
正在显示 26 个修改的文件 包含 2218 行增加 和 1 行删除
# Copyright 2022 Xiaomi Corp. (authors: Fangjun Kuang)
#
# See ../../../LICENSE for clarification regarding multiple authors
#
# 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.
from typing import Tuple
# Please sort it alphabetically
_static_files = (
("/css/bootstrap.min.css", "text/css"),
("/css/bootstrap.min.css.map", "text/css"),
("/index.html", "text/html"),
("/js/bootstrap.min.js", "application/javascript"),
("/js/bootstrap.min.js.map", "application/javascript"),
("/js/jquery-3.6.0.min.js", "application/javascript"),
("/js/offline_record.js", "application/javascript"),
("/js/offline_record.js", "application/javascript"),
("/js/popper.min.js", "application/javascript"),
("/js/popper.min.js.map", "application/javascript"),
("/js/streaming_record.js", "application/javascript"),
("/js/upload.js", "application/javascript"),
("/k2-logo.png", "image/png"),
("/nav-partial.html", "text/html"),
("/offline_record.html", "text/html"),
("/streaming_record.html", "text/html"),
("/upload.html", "text/html"),
)
_404_page = r"""
<!doctype html><html><head>
<title>Speech recognition with next-gen Kaldi</title><body>
<h1>404 ERROR! Please re-check your URL</h1>
</body></head></html>
"""
def read_file(root: str, name: str) -> str:
try:
with open(f"{root}/{name}") as f:
return f.read()
except: # noqa
with open(f"{root}/{name}", "rb") as f:
return f.read()
class HttpServer:
"""
A simple HTTP server that hosts only static files
"""
def __init__(self, doc_root: str):
content = dict()
for f, mime_type in _static_files:
content[f] = (read_file(doc_root, f), mime_type)
self.content = content
def process_request(self, f: str) -> Tuple[str, str, str]:
"""
Args:
f:
The filename to read.
Returns:
Return a tuple:
- a bool, True if the given file is found. False otherwise.
- a str, the content of the file if found. Otherwise, it
contains the content for the 404 page
- a str, the MIME type of the returned content
"""
if f in self.content:
return True, self.content[f][0], self.content[f][1]
else:
return False, _404_page, "text/html"
... ...
... ... @@ -119,7 +119,9 @@ def get_args():
"--sample-rate",
type=int,
default=16000,
help="Sample rate of the feature extractor. Must match the one expected by the model. Note: The input sound files can have a different sample rate from this argument.",
help="""Sample rate of the feature extractor. Must match the one
expected by the model. Note: The input sound files can have a
different sample rate from this argument.""",
)
parser.add_argument(
... ...
#!/usr/bin/env python3
# Copyright 2022-2023 Xiaomi Corp.
#
"""
A server for streaming ASR recognition. By streaming it means the audio samples
are coming in real-time. You don't need to wait until all audio samples are
captured before sending them for recognition.
It supports multiple clients sending at the same time.
Usage:
./streaming_server.py --help
Example:
python3 ./python-api-examples/streaming_server.py \
--encoder-model ./sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/encoder-epoch-99-avg-1.onnx \
--decoder-model ./sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/decoder-epoch-99-avg-1.onnx \
--joiner-model ./sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/joiner-epoch-99-avg-1.onnx \
--tokens ./sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/tokens.txt
"""
import argparse
import asyncio
import http
import json
import logging
import socket
import ssl
from concurrent.futures import ThreadPoolExecutor
from datetime import datetime
from pathlib import Path
from typing import List, Optional, Tuple
import numpy as np
import sherpa_onnx
import websockets
from http_server import HttpServer
def setup_logger(
log_filename: str,
log_level: str = "info",
use_console: bool = True,
) -> None:
"""Setup log level.
Args:
log_filename:
The filename to save the log.
log_level:
The log level to use, e.g., "debug", "info", "warning", "error",
"critical"
use_console:
True to also print logs to console.
"""
now = datetime.now()
date_time = now.strftime("%Y-%m-%d-%H-%M-%S")
formatter = "%(asctime)s %(levelname)s [%(filename)s:%(lineno)d] %(message)s"
log_filename = f"{log_filename}-{date_time}.txt"
Path(log_filename).parent.mkdir(parents=True, exist_ok=True)
level = logging.ERROR
if log_level == "debug":
level = logging.DEBUG
elif log_level == "info":
level = logging.INFO
elif log_level == "warning":
level = logging.WARNING
elif log_level == "critical":
level = logging.CRITICAL
logging.basicConfig(
filename=log_filename,
format=formatter,
level=level,
filemode="w",
)
if use_console:
console = logging.StreamHandler()
console.setLevel(level)
console.setFormatter(logging.Formatter(formatter))
logging.getLogger("").addHandler(console)
def add_model_args(parser: argparse.ArgumentParser):
parser.add_argument(
"--encoder-model",
type=str,
required=True,
help="Path to the encoder model",
)
parser.add_argument(
"--decoder-model",
type=str,
required=True,
help="Path to the decoder model.",
)
parser.add_argument(
"--joiner-model",
type=str,
required=True,
help="Path to the joiner model.",
)
parser.add_argument(
"--tokens",
type=str,
required=True,
help="Path to tokens.txt",
)
parser.add_argument(
"--sample-rate",
type=int,
default=16000,
help="Sample rate of the data used to train the model. "
"Caution: If your input sound files have a different sampling rate, "
"we will do resampling inside",
)
parser.add_argument(
"--feat-dim",
type=int,
default=80,
help="Feature dimension of the model",
)
def add_decoding_args(parser: argparse.ArgumentParser):
parser.add_argument(
"--decoding-method",
type=str,
default="greedy_search",
help="""Decoding method to use. Current supported methods are:
- greedy_search
- modified_beam_search
""",
)
add_modified_beam_search_args(parser)
def add_modified_beam_search_args(parser: argparse.ArgumentParser):
parser.add_argument(
"--num-active-paths",
type=int,
default=4,
help="""Used only when --decoding-method is modified_beam_search.
It specifies number of active paths to keep during decoding.
""",
)
def add_endpointing_args(parser: argparse.ArgumentParser):
parser.add_argument(
"--use-endpoint",
type=int,
default=1,
help="1 to enable endpoiting. 0 to disable it",
)
parser.add_argument(
"--rule1-min-trailing-silence",
type=float,
default=2.4,
help="""This endpointing rule1 requires duration of trailing silence
in seconds) to be >= this value""",
)
parser.add_argument(
"--rule2-min-trailing-silence",
type=float,
default=1.2,
help="""This endpointing rule2 requires duration of trailing silence in
seconds) to be >= this value.""",
)
parser.add_argument(
"--rule3-min-utterance-length",
type=float,
default=20,
help="""This endpointing rule3 requires utterance-length (in seconds)
to be >= this value.""",
)
def get_args():
parser = argparse.ArgumentParser(
formatter_class=argparse.ArgumentDefaultsHelpFormatter,
)
add_model_args(parser)
add_decoding_args(parser)
add_endpointing_args(parser)
parser.add_argument(
"--port",
type=int,
default=6006,
help="The server will listen on this port",
)
parser.add_argument(
"--nn-pool-size",
type=int,
default=1,
help="Number of threads for NN computation and decoding.",
)
parser.add_argument(
"--max-batch-size",
type=int,
default=50,
help="""Max batch size for computation. Note if there are not enough
requests in the queue, it will wait for max_wait_ms time. After that,
even if there are not enough requests, it still sends the
available requests in the queue for computation.
""",
)
parser.add_argument(
"--max-wait-ms",
type=float,
default=10,
help="""Max time in millisecond to wait to build batches for inference.
If there are not enough requests in the stream queue to build a batch
of max_batch_size, it waits up to this time before fetching available
requests for computation.
""",
)
parser.add_argument(
"--max-message-size",
type=int,
default=(1 << 20),
help="""Max message size in bytes.
The max size per message cannot exceed this limit.
""",
)
parser.add_argument(
"--max-queue-size",
type=int,
default=32,
help="Max number of messages in the queue for each connection.",
)
parser.add_argument(
"--max-active-connections",
type=int,
default=500,
help="""Maximum number of active connections. The server will refuse
to accept new connections once the current number of active connections
equals to this limit.
""",
)
parser.add_argument(
"--num-threads",
type=int,
default=1,
help="Sets the number of threads used for interop parallelism (e.g. in JIT interpreter) on CPU.",
)
parser.add_argument(
"--certificate",
type=str,
help="""Path to the X.509 certificate. You need it only if you want to
use a secure websocket connection, i.e., use wss:// instead of ws://.
You can use sherpa/bin/web/generate-certificate.py
to generate the certificate `cert.pem`.
""",
)
parser.add_argument(
"--doc-root",
type=str,
default="./python-api-examples/web",
help="""Path to the web root""",
)
return parser.parse_args()
def create_recognizer(args) -> sherpa_onnx.OnlineRecognizer:
recognizer = sherpa_onnx.OnlineRecognizer(
tokens=args.tokens,
encoder=args.encoder_model,
decoder=args.decoder_model,
joiner=args.joiner_model,
num_threads=1,
sample_rate=16000,
feature_dim=80,
decoding_method=args.decoding_method,
max_active_paths=args.num_active_paths,
enable_endpoint_detection=args.use_endpoint != 0,
rule1_min_trailing_silence=args.rule1_min_trailing_silence,
rule2_min_trailing_silence=args.rule2_min_trailing_silence,
rule3_min_utterance_length=args.rule3_min_utterance_length,
)
return recognizer
def format_timestamps(timestamps: List[float]) -> List[str]:
return ["{:.3f}".format(t) for t in timestamps]
class StreamingServer(object):
def __init__(
self,
recognizer: sherpa_onnx.OnlineRecognizer,
nn_pool_size: int,
max_wait_ms: float,
max_batch_size: int,
max_message_size: int,
max_queue_size: int,
max_active_connections: int,
doc_root: str,
certificate: Optional[str] = None,
):
"""
Args:
recognizer:
An instance of online recognizer.
nn_pool_size:
Number of threads for the thread pool that is responsible for
neural network computation and decoding.
max_wait_ms:
Max wait time in milliseconds in order to build a batch of
`batch_size`.
max_batch_size:
Max batch size for inference.
max_message_size:
Max size in bytes per message.
max_queue_size:
Max number of messages in the queue for each connection.
max_active_connections:
Max number of active connections. Once number of active client
equals to this limit, the server refuses to accept new connections.
beam_search_params:
Dictionary containing all the parameters for beam search.
online_endpoint_config:
Config for endpointing.
doc_root:
Path to the directory where files like index.html for the HTTP
server locate.
certificate:
Optional. If not None, it will use secure websocket.
You can use ./sherpa/bin/web/generate-certificate.py to generate
it (the default generated filename is `cert.pem`).
"""
self.recognizer = recognizer
self.certificate = certificate
self.http_server = HttpServer(doc_root)
self.nn_pool = ThreadPoolExecutor(
max_workers=nn_pool_size,
thread_name_prefix="nn",
)
self.stream_queue = asyncio.Queue()
self.max_wait_ms = max_wait_ms
self.max_batch_size = max_batch_size
self.max_message_size = max_message_size
self.max_queue_size = max_queue_size
self.max_active_connections = max_active_connections
self.current_active_connections = 0
self.sample_rate = int(recognizer.config.feat_config.sampling_rate)
self.decoding_method = recognizer.config.decoding_method
async def stream_consumer_task(self):
"""This function extracts streams from the queue, batches them up, sends
them to the RNN-T model for computation and decoding.
"""
while True:
if self.stream_queue.empty():
await asyncio.sleep(self.max_wait_ms / 1000)
continue
batch = []
try:
while len(batch) < self.max_batch_size:
item = self.stream_queue.get_nowait()
assert self.recognizer.is_ready(item[0])
batch.append(item)
except asyncio.QueueEmpty:
pass
stream_list = [b[0] for b in batch]
future_list = [b[1] for b in batch]
loop = asyncio.get_running_loop()
await loop.run_in_executor(
self.nn_pool,
self.recognizer.decode_streams,
stream_list,
)
for f in future_list:
self.stream_queue.task_done()
f.set_result(None)
async def compute_and_decode(
self,
stream: sherpa_onnx.OnlineStream,
) -> None:
"""Put the stream into the queue and wait it to be processed by the
consumer task.
Args:
stream:
The stream to be processed. Note: It is changed in-place.
"""
loop = asyncio.get_running_loop()
future = loop.create_future()
await self.stream_queue.put((stream, future))
await future
async def process_request(
self,
path: str,
request_headers: websockets.Headers,
) -> Optional[Tuple[http.HTTPStatus, websockets.Headers, bytes]]:
if "sec-websocket-key" not in request_headers:
# This is a normal HTTP request
if path == "/":
path = "/index.html"
found, response, mime_type = self.http_server.process_request(path)
if isinstance(response, str):
response = response.encode("utf-8")
if not found:
status = http.HTTPStatus.NOT_FOUND
else:
status = http.HTTPStatus.OK
header = {"Content-Type": mime_type}
return status, header, response
if self.current_active_connections < self.max_active_connections:
self.current_active_connections += 1
return None
# Refuse new connections
status = http.HTTPStatus.SERVICE_UNAVAILABLE # 503
header = {"Hint": "The server is overloaded. Please retry later."}
response = b"The server is busy. Please retry later."
return status, header, response
async def run(self, port: int):
task = asyncio.create_task(self.stream_consumer_task())
if self.certificate:
logging.info(f"Using certificate: {self.certificate}")
ssl_context = ssl.SSLContext(ssl.PROTOCOL_TLS_SERVER)
ssl_context.load_cert_chain(self.certificate)
else:
ssl_context = None
logging.info("No certificate provided")
async with websockets.serve(
self.handle_connection,
host="",
port=port,
max_size=self.max_message_size,
max_queue=self.max_queue_size,
process_request=self.process_request,
ssl=ssl_context,
):
ip_list = ["0.0.0.0", "localhost", "127.0.0.1"]
ip_list.append(socket.gethostbyname(socket.gethostname()))
proto = "http://" if ssl_context is None else "https://"
s = "Please visit one of the following addresses:\n\n"
for p in ip_list:
s += " " + proto + p + f":{port}" "\n"
logging.info(s)
await asyncio.Future() # run forever
await task # not reachable
async def handle_connection(
self,
socket: websockets.WebSocketServerProtocol,
):
"""Receive audio samples from the client, process it, and send
decoding result back to the client.
Args:
socket:
The socket for communicating with the client.
"""
try:
await self.handle_connection_impl(socket)
except websockets.exceptions.ConnectionClosedError:
logging.info(f"{socket.remote_address} disconnected")
finally:
# Decrement so that it can accept new connections
self.current_active_connections -= 1
logging.info(
f"Disconnected: {socket.remote_address}. "
f"Number of connections: {self.current_active_connections}/{self.max_active_connections}" # noqa
)
async def handle_connection_impl(
self,
socket: websockets.WebSocketServerProtocol,
):
"""Receive audio samples from the client, process it, and send
deocoding result back to the client.
Args:
socket:
The socket for communicating with the client.
"""
logging.info(
f"Connected: {socket.remote_address}. "
f"Number of connections: {self.current_active_connections}/{self.max_active_connections}" # noqa
)
stream = self.recognizer.create_stream()
segment = 0
while True:
samples = await self.recv_audio_samples(socket)
if samples is None:
break
# TODO(fangjun): At present, we assume the sampling rate
# of the received audio samples equal to --sample-rate
stream.accept_waveform(sample_rate=self.sample_rate, waveform=samples)
while self.recognizer.is_ready(stream):
await self.compute_and_decode(stream)
result = self.recognizer.get_result(stream)
message = {
"text": result,
"segment": segment,
}
if self.recognizer.is_endpoint(stream):
self.recognizer.reset(stream)
segment += 1
print(message)
await socket.send(json.dumps(message))
tail_padding = np.rand(int(self.sample_rate * 0.3), dtype=np.float32)
stream.accept_waveform(sampling_rate=self.sample_rate, waveform=tail_padding)
stream.input_finished()
while self.recognizer.is_ready(stream):
await self.compute_and_decode(stream)
result = self.recognizer.get_result(stream)
message = {
"text": result,
"segment": segment,
}
await socket.send(json.dumps(message))
async def recv_audio_samples(
self,
socket: websockets.WebSocketServerProtocol,
) -> Optional[np.ndarray]:
"""Receives a tensor from the client.
Each message contains either a bytes buffer containing audio samples
in 16 kHz or contains "Done" meaning the end of utterance.
Args:
socket:
The socket for communicating with the client.
Returns:
Return a 1-D np.float32 tensor containing the audio samples or
return None.
"""
message = await socket.recv()
if message == "Done":
return None
return np.frombuffer(message, dtype=np.float32)
def check_args(args):
assert Path(args.encoder_model).is_file(), f"{args.encoder_model} does not exist"
assert Path(args.decoder_model).is_file(), f"{args.decoder_model} does not exist"
assert Path(args.joiner_model).is_file(), f"{args.joiner_model} does not exist"
if not Path(args.tokens).is_file():
raise ValueError(f"{args.tokens} does not exist")
if args.decoding_method not in (
"greedy_search",
"modified_beam_search",
):
raise ValueError(f"Unsupported decoding method {args.decoding_method}")
if args.decoding_method == "modified_beam_search":
assert args.num_active_paths > 0, args.num_active_paths
def main():
args = get_args()
logging.info(vars(args))
check_args(args)
recognizer = create_recognizer(args)
port = args.port
nn_pool_size = args.nn_pool_size
max_batch_size = args.max_batch_size
max_wait_ms = args.max_wait_ms
max_message_size = args.max_message_size
max_queue_size = args.max_queue_size
max_active_connections = args.max_active_connections
certificate = args.certificate
doc_root = args.doc_root
if certificate and not Path(certificate).is_file():
raise ValueError(f"{certificate} does not exist")
if not Path(doc_root).is_dir():
raise ValueError(f"Directory {doc_root} does not exist")
server = StreamingServer(
recognizer=recognizer,
nn_pool_size=nn_pool_size,
max_batch_size=max_batch_size,
max_wait_ms=max_wait_ms,
max_message_size=max_message_size,
max_queue_size=max_queue_size,
max_active_connections=max_active_connections,
certificate=certificate,
doc_root=doc_root,
)
asyncio.run(server.run(port))
if __name__ == "__main__":
log_filename = "log/log-streaming-zipformer"
setup_logger(log_filename)
main()
... ...
*.pem
*.key
*.crt
... ...
# How to use
```bash
git clone https://github.com/k2-fsa/sherpa
cd sherpa/sherpa/bin/web
python3 -m http.server 6009
```
and then go to <http://localhost:6009>
You will see a page like the following screenshot:
![Screenshot if you visit http://localhost:6009](./pic/web-ui.png)
If your server is listening at the port *6006* with address **localhost**,
then you can either click **Upload**, **Streaming_Record** or **Offline_Record** to play with it.
## File descriptions
### ./css/bootstrap.min.css
It is downloaded from https://cdn.jsdelivr.net/npm/bootstrap@4.3.1/dist/css/bootstrap.min.css
### ./js/jquery-3.6.0.min.js
It is downloaded from https://code.jquery.com/jquery-3.6.0.min.js
### ./js/popper.min.js
It is downloaded from https://cdn.jsdelivr.net/npm/popper.js@1.14.7/dist/umd/popper.min.js
### ./js/bootstrap.min.js
It is download from https://cdn.jsdelivr.net/npm/bootstrap@4.3.1/dist/js/bootstrap.min.js
... ...
#!/usr/bin/env python3
"""
pip install pyopenssl
"""
from OpenSSL import crypto
# The code in this file is modified from
# https://stackoverflow.com/questions/27164354/create-a-self-signed-x509-certificate-in-python
"""
This script generates 3 files:
- private.key
- selfsigned.crt
- cert.pem
You need cert.pem when you start a https server
or a secure websocket server.
Note: You need to change serialNumber if you want to generate
a new certificate as two different certificates cannot share
the same serial number if they are issued by the same organization.
Otherwise, you may get the following error from within you browser:
An error occurred during a connection to 127.0.0.1:6007. You have received an
invalid certificate. Please contact the server administrator or email
correspondent and give them the following information: Your certificate
contains the same serial number as another certificate issued by the
certificate authority. Please get a new certificate containing a unique
serial number. Error code: SEC_ERROR_REUSED_ISSUER_AND_SERIAL
"""
def cert_gen(
emailAddress="https://github.com/k2-fsa/k2",
commonName="sherpa",
countryName="CN",
localityName="k2-fsa",
stateOrProvinceName="k2-fsa",
organizationName="k2-fsa",
organizationUnitName="k2-fsa",
serialNumber=3,
validityStartInSeconds=0,
validityEndInSeconds=10 * 365 * 24 * 60 * 60,
KEY_FILE="private.key",
CERT_FILE="selfsigned.crt",
ALL_IN_ONE_FILE="cert.pem",
):
# can look at generated file using openssl:
# openssl x509 -inform pem -in selfsigned.crt -noout -text
# create a key pair
k = crypto.PKey()
k.generate_key(crypto.TYPE_RSA, 4096)
# create a self-signed cert
cert = crypto.X509()
cert.get_subject().C = countryName
cert.get_subject().ST = stateOrProvinceName
cert.get_subject().L = localityName
cert.get_subject().O = organizationName # noqa
cert.get_subject().OU = organizationUnitName
cert.get_subject().CN = commonName
cert.get_subject().emailAddress = emailAddress
cert.set_serial_number(serialNumber)
cert.gmtime_adj_notBefore(0)
cert.gmtime_adj_notAfter(validityEndInSeconds)
cert.set_issuer(cert.get_subject())
cert.set_pubkey(k)
cert.sign(k, "sha512")
with open(CERT_FILE, "wt") as f:
f.write(
crypto.dump_certificate(crypto.FILETYPE_PEM, cert).decode("utf-8")
)
with open(KEY_FILE, "wt") as f:
f.write(crypto.dump_privatekey(crypto.FILETYPE_PEM, k).decode("utf-8"))
with open(ALL_IN_ONE_FILE, "wt") as f:
f.write(crypto.dump_privatekey(crypto.FILETYPE_PEM, k).decode("utf-8"))
f.write(
crypto.dump_certificate(crypto.FILETYPE_PEM, cert).decode("utf-8")
)
print(f"Generated {CERT_FILE}")
print(f"Generated {KEY_FILE}")
print(f"Generated {ALL_IN_ONE_FILE}")
cert_gen()
... ...
<!doctype html>
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8"></meta>
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"></meta>
<!-- Bootstrap CSS -->
<link rel="stylesheet"
href="./css/bootstrap.min.css"
integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T"
crossorigin="anonymous">
</link>
<link rel="icon"
type="image/png"
href="./k2-logo.png">
<script src="./js/jquery-3.6.0.min.js" integrity="sha256-/xUj+3OJU5yExlq6GSYGSHk7tPXikynS7ogEvDej/m4=" crossorigin="anonymous"></script>
<title>Next-gen Kaldi demo</title>
</head>
<body>
<div id="nav"></div>
<script>
$(function(){
$("#nav").load("nav-partial.html");
});
</script>
<ul class="list-unstyled">
<li class="media">
<div class="media-body">
<h5 class="mt-0 mb-1">Upload</h5>
<p>Recognition from a selected file</p>
</div>
<li>
<li class="media">
<div class="media-body">
<h5 class="mt-0 mb-1">Streaming_Record</h5>
<p>Recognition from real-time recordings</p>
</div>
</li>
<li class="media">
<div class="media-body">
<h5 class="mt-0 mb-1">Offline_Record</h5>
<p>Recognition from offline recordings</p>
</div>
</li>
</ul>
Code is available at
<a href="https://github.com/k2-fsa/sherpa"> https://github.com/k2-fsa/sherpa</a>
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</script>
<script src="./js/bootstrap.min.js"
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</script>
</body>
</html>
... ...
/*!
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// This file copies and modifies code
// from https://mdn.github.io/web-dictaphone/scripts/app.js
// and https://gist.github.com/meziantou/edb7217fddfbb70e899e
var socket;
const serverIpInput = document.getElementById('server-ip');
const serverPortInput = document.getElementById('server-port');
const connectBtn = document.getElementById('connect');
const uploadBtn = document.getElementById('file');
function initWebSocket() {
let protocol = 'ws://';
if (window.location.protocol == 'https:') {
protocol = 'wss://'
}
let server_ip = serverIpInput.value;
let server_port = serverPortInput.value;
console.log('protocol: ', protocol);
console.log('server_ip: ', server_ip);
console.log('server_port: ', server_port);
let uri = protocol + server_ip + ':' + server_port;
console.log('uri', uri);
socket = new WebSocket(uri);
// Connection opened
socket.addEventListener('open', function(event) {
console.log('connected');
recordBtn.disabled = false;
connectBtn.disabled = true;
connectBtn.innerHTML = 'Connected!';
});
// Connection closed
socket.addEventListener('close', function(event) {
console.log('disconnected');
recordBtn.disabled = true;
stopBtn.disabled = true;
connectBtn.disabled = false;
connectBtn.innerHTML = 'Click me to connect!';
});
// Listen for messages
socket.addEventListener('message', function(event) {
console.log('Received message: ', event.data);
document.getElementById('results').value = event.data;
socket.send('Done');
console.log('Sent Done');
socket.close();
});
}
const recordBtn = document.getElementById('offline_record');
const stopBtn = document.getElementById('offline_stop');
const clearBtn = document.getElementById('clear');
const soundClips = document.getElementById('sound-clips');
const canvas = document.getElementById('canvas');
const mainSection = document.querySelector('.container');
stopBtn.disabled = true;
window.onload = (event) => {
console.log('page is fully loaded');
console.log('protocol', window.location.protocol);
console.log('port', window.location.port);
if (window.location.protocol == 'https:') {
document.getElementById('ws-protocol').textContent = 'wss://';
}
serverIpInput.value = window.location.hostname;
serverPortInput.value = window.location.port;
};
connectBtn.onclick = function() {
initWebSocket();
};
let audioCtx;
const canvasCtx = canvas.getContext('2d');
let mediaStream;
let analyser;
let expectedSampleRate = 16000;
let recordSampleRate; // the sampleRate of the microphone
let recorder = null; // the microphone
let leftchannel = []; // TODO: Use a single channel
let recordingLength = 0; // number of samples so far
clearBtn.onclick = function() {
document.getElementById('results').value = '';
};
function send_header(n) {
const header = new ArrayBuffer(4);
new DataView(header).setInt32(0, n, true /* littleEndian */);
socket.send(new Int32Array(header, 0, 1));
}
// copied/modified from https://mdn.github.io/web-dictaphone/
// and
// https://gist.github.com/meziantou/edb7217fddfbb70e899e
if (navigator.mediaDevices.getUserMedia) {
console.log('getUserMedia supported.');
// see https://w3c.github.io/mediacapture-main/#dom-mediadevices-getusermedia
const constraints = {audio: true};
let onSuccess = function(stream) {
if (!audioCtx) {
audioCtx = new AudioContext();
}
console.log(audioCtx);
recordSampleRate = audioCtx.sampleRate;
console.log('sample rate ' + recordSampleRate);
// creates an audio node from the microphone incoming stream
mediaStream = audioCtx.createMediaStreamSource(stream);
console.log(mediaStream);
// https://developer.mozilla.org/en-US/docs/Web/API/AudioContext/createScriptProcessor
// bufferSize: the onaudioprocess event is called when the buffer is full
var bufferSize = 2048;
var numberOfInputChannels = 2;
var numberOfOutputChannels = 2;
if (audioCtx.createScriptProcessor) {
recorder = audioCtx.createScriptProcessor(
bufferSize, numberOfInputChannels, numberOfOutputChannels);
} else {
recorder = audioCtx.createJavaScriptNode(
bufferSize, numberOfInputChannels, numberOfOutputChannels);
}
console.log(recorder);
recorder.onaudioprocess = function(e) {
let samples = new Float32Array(e.inputBuffer.getChannelData(0))
samples = downsampleBuffer(samples, expectedSampleRate);
let buf = new Int16Array(samples.length);
for (var i = 0; i < samples.length; ++i) {
let s = samples[i];
if (s >= 1)
s = 1;
else if (s <= -1)
s = -1;
buf[i] = s * 32767;
}
leftchannel.push(buf);
recordingLength += bufferSize;
};
visualize(stream);
mediaStream.connect(analyser);
recordBtn.onclick = function() {
mediaStream.connect(recorder);
mediaStream.connect(analyser);
recorder.connect(audioCtx.destination);
console.log('recorder started');
recordBtn.style.background = 'red';
stopBtn.disabled = false;
recordBtn.disabled = true;
};
stopBtn.onclick = function() {
console.log('recorder stopped');
// stopBtn recording
recorder.disconnect(audioCtx.destination);
mediaStream.disconnect(recorder);
mediaStream.disconnect(analyser);
recordBtn.style.background = '';
recordBtn.style.color = '';
// mediaRecorder.requestData();
stopBtn.disabled = true;
recordBtn.disabled = false;
const clipName =
prompt('Enter a name for your sound clip?', 'My unnamed clip');
const clipContainer = document.createElement('article');
const clipLabel = document.createElement('p');
const audio = document.createElement('audio');
const deleteButton = document.createElement('button');
clipContainer.classList.add('clip');
audio.setAttribute('controls', '');
deleteButton.textContent = 'Delete';
deleteButton.className = 'delete';
if (clipName === null) {
clipLabel.textContent = 'My unnamed clip';
} else {
clipLabel.textContent = clipName;
}
clipContainer.appendChild(audio);
clipContainer.appendChild(clipLabel);
clipContainer.appendChild(deleteButton);
soundClips.appendChild(clipContainer);
audio.controls = true;
let samples = flatten(leftchannel);
let buf = new Float32Array(samples.length);
for (var i = 0; i < samples.length; ++i) {
let s = samples[i];
buf[i] = s / 32767.0;
}
const blob = toWav(samples);
leftchannel = [];
const audioURL = window.URL.createObjectURL(blob);
audio.src = audioURL;
console.log('recorder stopped');
deleteButton.onclick = function(e) {
let evtTgt = e.target;
evtTgt.parentNode.parentNode.removeChild(evtTgt.parentNode);
};
clipLabel.onclick = function() {
const existingName = clipLabel.textContent;
const newClipName = prompt('Enter a new name for your sound clip?');
if (newClipName === null) {
clipLabel.textContent = existingName;
} else {
clipLabel.textContent = newClipName;
}
};
buf = buf.buffer
let n = 1024 * 4; // send this number of bytes per request.
console.log('buf length, ' + buf.byteLength);
send_header(buf.byteLength);
for (let start = 0; start < buf.byteLength; start += n) {
socket.send(buf.slice(start, start + n));
}
};
};
let onError = function(err) {
console.log('The following error occured: ' + err);
};
navigator.mediaDevices.getUserMedia(constraints).then(onSuccess, onError);
} else {
console.log('getUserMedia not supported on your browser!');
alert('getUserMedia not supported on your browser!');
}
function visualize(stream) {
if (!audioCtx) {
audioCtx = new AudioContext();
}
const source = audioCtx.createMediaStreamSource(stream);
if (!analyser) {
analyser = audioCtx.createAnalyser();
analyser.fftSize = 2048;
}
const bufferLength = analyser.frequencyBinCount;
const dataArray = new Uint8Array(bufferLength);
// source.connect(analyser);
// analyser.connect(audioCtx.destination);
draw()
function draw() {
const WIDTH = canvas.width
const HEIGHT = canvas.height;
requestAnimationFrame(draw);
analyser.getByteTimeDomainData(dataArray);
canvasCtx.fillStyle = 'rgb(200, 200, 200)';
canvasCtx.fillRect(0, 0, WIDTH, HEIGHT);
canvasCtx.lineWidth = 2;
canvasCtx.strokeStyle = 'rgb(0, 0, 0)';
canvasCtx.beginPath();
let sliceWidth = WIDTH * 1.0 / bufferLength;
let x = 0;
for (let i = 0; i < bufferLength; i++) {
let v = dataArray[i] / 128.0;
let y = v * HEIGHT / 2;
if (i === 0) {
canvasCtx.moveTo(x, y);
} else {
canvasCtx.lineTo(x, y);
}
x += sliceWidth;
}
canvasCtx.lineTo(canvas.width, canvas.height / 2);
canvasCtx.stroke();
}
}
window.onresize = function() {
canvas.width = mainSection.offsetWidth;
};
window.onresize();
// this function is copied/modified from
// https://gist.github.com/meziantou/edb7217fddfbb70e899e
function flatten(listOfSamples) {
let n = 0;
for (let i = 0; i < listOfSamples.length; ++i) {
n += listOfSamples[i].length;
}
let ans = new Int16Array(n);
let offset = 0;
for (let i = 0; i < listOfSamples.length; ++i) {
ans.set(listOfSamples[i], offset);
offset += listOfSamples[i].length;
}
return ans;
}
// this function is copied/modified from
// https://gist.github.com/meziantou/edb7217fddfbb70e899e
function toWav(samples) {
let buf = new ArrayBuffer(44 + samples.length * 2);
var view = new DataView(buf);
// http://soundfile.sapp.org/doc/WaveFormat/
// F F I R
view.setUint32(0, 0x46464952, true); // chunkID
view.setUint32(4, 36 + samples.length * 2, true); // chunkSize
// E V A W
view.setUint32(8, 0x45564157, true); // format
//
// t m f
view.setUint32(12, 0x20746d66, true); // subchunk1ID
view.setUint32(16, 16, true); // subchunk1Size, 16 for PCM
view.setUint32(20, 1, true); // audioFormat, 1 for PCM
view.setUint16(22, 1, true); // numChannels: 1 channel
view.setUint32(24, expectedSampleRate, true); // sampleRate
view.setUint32(28, expectedSampleRate * 2, true); // byteRate
view.setUint16(32, 2, true); // blockAlign
view.setUint16(34, 16, true); // bitsPerSample
view.setUint32(36, 0x61746164, true); // Subchunk2ID
view.setUint32(40, samples.length * 2, true); // subchunk2Size
let offset = 44;
for (let i = 0; i < samples.length; ++i) {
view.setInt16(offset, samples[i], true);
offset += 2;
}
return new Blob([view], {type: 'audio/wav'});
}
// this function is copied from
// https://github.com/awslabs/aws-lex-browser-audio-capture/blob/master/lib/worker.js#L46
function downsampleBuffer(buffer, exportSampleRate) {
if (exportSampleRate === recordSampleRate) {
return buffer;
}
var sampleRateRatio = recordSampleRate / exportSampleRate;
var newLength = Math.round(buffer.length / sampleRateRatio);
var result = new Float32Array(newLength);
var offsetResult = 0;
var offsetBuffer = 0;
while (offsetResult < result.length) {
var nextOffsetBuffer = Math.round((offsetResult + 1) * sampleRateRatio);
var accum = 0, count = 0;
for (var i = offsetBuffer; i < nextOffsetBuffer && i < buffer.length; i++) {
accum += buffer[i];
count++;
}
result[offsetResult] = accum / count;
offsetResult++;
offsetBuffer = nextOffsetBuffer;
}
return result;
};
... ...
/*
Copyright (C) Federico Zivolo 2019
Distributed under the MIT License (license terms are at http://opensource.org/licenses/MIT).
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i&&'BODY'!==i&&'HTML'!==i?-1!==['TH','TD','TABLE'].indexOf(n.nodeName)&&'static'===t(n,'position')?p(n):n:e?e.ownerDocument.documentElement:document.documentElement}function s(e){var t=e.nodeName;return'BODY'!==t&&('HTML'===t||p(e.firstElementChild)===e)}function d(e){return null===e.parentNode?e:d(e.parentNode)}function a(e,t){if(!e||!e.nodeType||!t||!t.nodeType)return document.documentElement;var o=e.compareDocumentPosition(t)&Node.DOCUMENT_POSITION_FOLLOWING,n=o?e:t,i=o?t:e,r=document.createRange();r.setStart(n,0),r.setEnd(i,0);var l=r.commonAncestorContainer;if(e!==l&&t!==l||n.contains(i))return s(l)?l:p(l);var f=d(e);return f.host?a(f.host,t):a(e,d(t).host)}function l(e){var t=1<arguments.length&&void 0!==arguments[1]?arguments[1]:'top',o='top'===t?'scrollTop':'scrollLeft',n=e.nodeName;if('BODY'===n||'HTML'===n){var i=e.ownerDocument.documentElement,r=e.ownerDocument.scrollingElement||i;return r[o]}return e[o]}function f(e,t){var o=2<arguments.length&&void 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m=c(e.ownerDocument),h=m.height,g=m.width;s.top+=f.top-f.marginTop,s.bottom=h+f.top,s.left+=f.left-f.marginLeft,s.right=g+f.left}else s=f}i=i||0;var u='number'==typeof i;return s.left+=u?i:i.left||0,s.top+=u?i:i.top||0,s.right-=u?i:i.right||0,s.bottom-=u?i:i.bottom||0,s}function x(e){var t=e.width,o=e.height;return t*o}function O(e,t,o,n,i){var r=5<arguments.length&&void 0!==arguments[5]?arguments[5]:0;if(-1===e.indexOf('auto'))return e;var p=v(o,n,r,i),s={top:{width:p.width,height:t.top-p.top},right:{width:p.right-t.right,height:p.height},bottom:{width:p.width,height:p.bottom-t.bottom},left:{width:t.left-p.left,height:p.height}},d=Object.keys(s).map(function(e){return fe({key:e},s[e],{area:x(s[e])})}).sort(function(e,t){return t.area-e.area}),a=d.filter(function(e){var t=e.width,n=e.height;return t>=o.clientWidth&&n>=o.clientHeight}),l=0<a.length?a[0].key:d[0].key,f=e.split('-')[1];return l+(f?'-'+f:'')}function L(e,t,o){var n=3<arguments.length&&void 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this.state.isDestroyed=!0,W(this.modifiers,'applyStyle')&&(this.popper.removeAttribute('x-placement'),this.popper.style.position='',this.popper.style.top='',this.popper.style.left='',this.popper.style.right='',this.popper.style.bottom='',this.popper.style.willChange='',this.popper.style[H('transform')]=''),this.disableEventListeners(),this.options.removeOnDestroy&&this.popper.parentNode.removeChild(this.popper),this}function A(e){var t=e.ownerDocument;return t?t.defaultView:window}function M(e,t,o,i){var r='BODY'===e.nodeName,p=r?e.ownerDocument.defaultView:e;p.addEventListener(t,o,{passive:!0}),r||M(n(p.parentNode),t,o,i),i.push(p)}function F(e,t,o,i){o.updateBound=i,A(e).addEventListener('resize',o.updateBound,{passive:!0});var r=n(e);return M(r,'scroll',o.updateBound,o.scrollParents),o.scrollElement=r,o.eventsEnabled=!0,o}function I(){this.state.eventsEnabled||(this.state=F(this.reference,this.options,this.state,this.scheduleUpdate))}function R(e,t){return 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requestAnimationFrame(i.update)},this.update=re(this.update.bind(this)),this.options=fe({},t.Defaults,r),this.state={isDestroyed:!1,isCreated:!1,scrollParents:[]},this.reference=o&&o.jquery?o[0]:o,this.popper=n&&n.jquery?n[0]:n,this.options.modifiers={},Object.keys(fe({},t.Defaults.modifiers,r.modifiers)).forEach(function(e){i.options.modifiers[e]=fe({},t.Defaults.modifiers[e]||{},r.modifiers?r.modifiers[e]:{})}),this.modifiers=Object.keys(this.options.modifiers).map(function(e){return fe({name:e},i.options.modifiers[e])}).sort(function(e,t){return e.order-t.order}),this.modifiers.forEach(function(t){t.enabled&&e(t.onLoad)&&t.onLoad(i.reference,i.popper,i.options,t,i.state)}),this.update();var p=this.options.eventsEnabled;p&&this.enableEventListeners(),this.state.eventsEnabled=p}return ae(t,[{key:'update',value:function(){return k.call(this)}},{key:'destroy',value:function(){return B.call(this)}},{key:'enableEventListeners',value:function(){return I.call(this)}},{key:'disableEventListeners',value:function(){return U.call(this)}}]),t}();return ue.Utils=('undefined'==typeof window?global:window).PopperUtils,ue.placements=he,ue.Defaults={placement:'bottom',positionFixed:!1,eventsEnabled:!0,removeOnDestroy:!1,onCreate:function(){},onUpdate:function(){},modifiers:{shift:{order:100,enabled:!0,fn:function(e){var t=e.placement,o=t.split('-')[0],n=t.split('-')[1];if(n){var i=e.offsets,r=i.reference,p=i.popper,s=-1!==['bottom','top'].indexOf(o),d=s?'left':'top',a=s?'width':'height',l={start:le({},d,r[d]),end:le({},d,r[d]+r[a]-p[a])};e.offsets.popper=fe({},p,l[n])}return e}},offset:{order:200,enabled:!0,fn:J,offset:0},preventOverflow:{order:300,enabled:!0,fn:function(e,t){var o=t.boundariesElement||p(e.instance.popper);e.instance.reference===o&&(o=p(o));var n=H('transform'),i=e.instance.popper.style,r=i.top,s=i.left,d=i[n];i.top='',i.left='',i[n]='';var a=v(e.instance.popper,e.instance.reference,t.padding,o,e.positionFixed);i.top=r,i.left=s,i[n]=d,t.boundaries=a;var l=t.priority,f=e.offsets.popper,m={primary:function(e){var o=f[e];return f[e]<a[e]&&!t.escapeWithReference&&(o=ee(f[e],a[e])),le({},e,o)},secondary:function(e){var o='right'===e?'left':'top',n=f[o];return f[e]>a[e]&&!t.escapeWithReference&&(n=Q(f[o],a[e]-('right'===e?f.width:f.height))),le({},o,n)}};return l.forEach(function(e){var t=-1===['left','top'].indexOf(e)?'secondary':'primary';f=fe({},f,m[t](e))}),e.offsets.popper=f,e},priority:['left','right','top','bottom'],padding:5,boundariesElement:'scrollParent'},keepTogether:{order:400,enabled:!0,fn:function(e){var t=e.offsets,o=t.popper,n=t.reference,i=e.placement.split('-')[0],r=Z,p=-1!==['top','bottom'].indexOf(i),s=p?'right':'bottom',d=p?'left':'top',a=p?'width':'height';return o[s]<r(n[d])&&(e.offsets.popper[d]=r(n[d])-o[a]),o[d]>r(n[s])&&(e.offsets.popper[d]=r(n[s])),e}},arrow:{order:500,enabled:!0,fn:function(e,o){var n;if(!K(e.instance.modifiers,'arrow','keepTogether'))return e;var i=o.element;if('string'==typeof i){if(i=e.instance.popper.querySelector(i),!i)return e;}else if(!e.instance.popper.contains(i))return console.warn('WARNING: `arrow.element` must be child of its popper element!'),e;var r=e.placement.split('-')[0],p=e.offsets,s=p.popper,d=p.reference,a=-1!==['left','right'].indexOf(r),l=a?'height':'width',f=a?'Top':'Left',m=f.toLowerCase(),h=a?'left':'top',c=a?'bottom':'right',u=S(i)[l];d[c]-u<s[m]&&(e.offsets.popper[m]-=s[m]-(d[c]-u)),d[m]+u>s[c]&&(e.offsets.popper[m]+=d[m]+u-s[c]),e.offsets.popper=g(e.offsets.popper);var b=d[m]+d[l]/2-u/2,w=t(e.instance.popper),y=parseFloat(w['margin'+f],10),E=parseFloat(w['border'+f+'Width'],10),v=b-e.offsets.popper[m]-y-E;return v=ee(Q(s[l]-u,v),0),e.arrowElement=i,e.offsets.arrow=(n={},le(n,m,$(v)),le(n,h,''),n),e},element:'[x-arrow]'},flip:{order:600,enabled:!0,fn:function(e,t){if(W(e.instance.modifiers,'inner'))return e;if(e.flipped&&e.placement===e.originalPlacement)return e;var o=v(e.instance.popper,e.instance.reference,t.padding,t.boundariesElement,e.positionFixed),n=e.placement.split('-')[0],i=T(n),r=e.placement.split('-')[1]||'',p=[];switch(t.behavior){case ge.FLIP:p=[n,i];break;case ge.CLOCKWISE:p=G(n);break;case ge.COUNTERCLOCKWISE:p=G(n,!0);break;default:p=t.behavior;}return p.forEach(function(s,d){if(n!==s||p.length===d+1)return e;n=e.placement.split('-')[0],i=T(n);var a=e.offsets.popper,l=e.offsets.reference,f=Z,m='left'===n&&f(a.right)>f(l.left)||'right'===n&&f(a.left)<f(l.right)||'top'===n&&f(a.bottom)>f(l.top)||'bottom'===n&&f(a.top)<f(l.bottom),h=f(a.left)<f(o.left),c=f(a.right)>f(o.right),g=f(a.top)<f(o.top),u=f(a.bottom)>f(o.bottom),b='left'===n&&h||'right'===n&&c||'top'===n&&g||'bottom'===n&&u,w=-1!==['top','bottom'].indexOf(n),y=!!t.flipVariations&&(w&&'start'===r&&h||w&&'end'===r&&c||!w&&'start'===r&&g||!w&&'end'===r&&u);(m||b||y)&&(e.flipped=!0,(m||b)&&(n=p[d+1]),y&&(r=z(r)),e.placement=n+(r?'-'+r:''),e.offsets.popper=fe({},e.offsets.popper,D(e.instance.popper,e.offsets.reference,e.placement)),e=P(e.instance.modifiers,e,'flip'))}),e},behavior:'flip',padding:5,boundariesElement:'viewport'},inner:{order:700,enabled:!1,fn:function(e){var t=e.placement,o=t.split('-')[0],n=e.offsets,i=n.popper,r=n.reference,p=-1!==['left','right'].indexOf(o),s=-1===['top','left'].indexOf(o);return i[p?'left':'top']=r[o]-(s?i[p?'width':'height']:0),e.placement=T(t),e.offsets.popper=g(i),e}},hide:{order:800,enabled:!0,fn:function(e){if(!K(e.instance.modifiers,'hide','preventOverflow'))return e;var t=e.offsets.reference,o=C(e.instance.modifiers,function(e){return'preventOverflow'===e.name}).boundaries;if(t.bottom<o.top||t.left>o.right||t.top>o.bottom||t.right<o.left){if(!0===e.hide)return e;e.hide=!0,e.attributes['x-out-of-boundaries']=''}else{if(!1===e.hide)return e;e.hide=!1,e.attributes['x-out-of-boundaries']=!1}return e}},computeStyle:{order:850,enabled:!0,fn:function(e,t){var o=t.x,n=t.y,i=e.offsets.popper,r=C(e.instance.modifiers,function(e){return'applyStyle'===e.name}).gpuAcceleration;void 0!==r&&console.warn('WARNING: `gpuAcceleration` option moved to `computeStyle` modifier and will not be supported in future versions of Popper.js!');var s,d,a=void 0===r?t.gpuAcceleration:r,l=p(e.instance.popper),f=u(l),m={position:i.position},h=q(e,2>window.devicePixelRatio||!me),c='bottom'===o?'top':'bottom',g='right'===n?'left':'right',b=H('transform');if(d='bottom'==c?'HTML'===l.nodeName?-l.clientHeight+h.bottom:-f.height+h.bottom:h.top,s='right'==g?'HTML'===l.nodeName?-l.clientWidth+h.right:-f.width+h.right:h.left,a&&b)m[b]='translate3d('+s+'px, '+d+'px, 0)',m[c]=0,m[g]=0,m.willChange='transform';else{var w='bottom'==c?-1:1,y='right'==g?-1:1;m[c]=d*w,m[g]=s*y,m.willChange=c+', '+g}var E={"x-placement":e.placement};return e.attributes=fe({},E,e.attributes),e.styles=fe({},m,e.styles),e.arrowStyles=fe({},e.offsets.arrow,e.arrowStyles),e},gpuAcceleration:!0,x:'bottom',y:'right'},applyStyle:{order:900,enabled:!0,fn:function(e){return j(e.instance.popper,e.styles),V(e.instance.popper,e.attributes),e.arrowElement&&Object.keys(e.arrowStyles).length&&j(e.arrowElement,e.arrowStyles),e},onLoad:function(e,t,o,n,i){var r=L(i,t,e,o.positionFixed),p=O(o.placement,r,t,e,o.modifiers.flip.boundariesElement,o.modifiers.flip.padding);return t.setAttribute('x-placement',p),j(t,{position:o.positionFixed?'fixed':'absolute'}),o},gpuAcceleration:void 0}}},ue});
//# sourceMappingURL=popper.min.js.map
... ...
// This file copies and modifies code
// from https://mdn.github.io/web-dictaphone/scripts/app.js
// and https://gist.github.com/meziantou/edb7217fddfbb70e899e
var socket;
var recognition_text = [];
function getDisplayResult() {
let i = 0;
let ans = '';
for (let s in recognition_text) {
if (recognition_text[s] == '') continue;
ans += '' + i + ': ' + recognition_text[s] + '\n';
i += 1;
}
return ans;
}
function initWebSocket() {
console.log('Creating websocket')
let protocol = 'ws://';
if (window.location.protocol == 'https:') {
protocol = 'wss://'
}
let server_ip = serverIpInput.value;
let server_port = serverPortInput.value;
console.log('protocol: ', protocol);
console.log('server_ip: ', server_ip);
console.log('server_port: ', server_port);
let uri = protocol + server_ip + ':' + server_port;
console.log('uri', uri);
socket = new WebSocket(uri);
// socket = new WebSocket('wss://localhost:6006/');
// Connection opened
socket.addEventListener('open', function(event) {
console.log('connected');
recordBtn.disabled = false;
connectBtn.disabled = true;
connectBtn.innerHTML = 'Connected!';
});
// Connection closed
socket.addEventListener('close', function(event) {
console.log('disconnected');
recordBtn.disabled = true;
connectBtn.disabled = false;
connectBtn.innerHTML = 'Click me to connect!';
});
// Listen for messages
socket.addEventListener('message', function(event) {
let message = JSON.parse(event.data);
if (message.segment in recognition_text) {
recognition_text[message.segment] = message.text;
} else {
recognition_text.push(message.text);
}
let text_area = document.getElementById('results');
text_area.value = getDisplayResult();
text_area.scrollTop = text_area.scrollHeight; // auto scroll
console.log('Received message: ', event.data);
});
}
window.onload = (event) => {
console.log('page is fully loaded');
console.log('protocol', window.location.protocol);
console.log('port', window.location.port);
if (window.location.protocol == 'https:') {
document.getElementById('ws-protocol').textContent = 'wss://';
}
serverIpInput.value = window.location.hostname;
serverPortInput.value = window.location.port;
};
const serverIpInput = document.getElementById('server-ip');
const serverPortInput = document.getElementById('server-port');
const connectBtn = document.getElementById('connect');
const recordBtn = document.getElementById('streaming_record');
const stopBtn = document.getElementById('streaming_stop');
const clearBtn = document.getElementById('clear');
const soundClips = document.getElementById('sound-clips');
const canvas = document.getElementById('canvas');
const mainSection = document.querySelector('.container');
stopBtn.disabled = true;
let audioCtx;
const canvasCtx = canvas.getContext('2d');
let mediaStream;
let analyser;
let expectedSampleRate = 16000;
let recordSampleRate; // the sampleRate of the microphone
let recorder = null; // the microphone
let leftchannel = []; // TODO: Use a single channel
let recordingLength = 0; // number of samples so far
clearBtn.onclick = function() {
document.getElementById('results').value = '';
recognition_text = [];
};
connectBtn.onclick = function() {
initWebSocket();
};
// copied/modified from https://mdn.github.io/web-dictaphone/
// and
// https://gist.github.com/meziantou/edb7217fddfbb70e899e
if (navigator.mediaDevices.getUserMedia) {
console.log('getUserMedia supported.');
// see https://w3c.github.io/mediacapture-main/#dom-mediadevices-getusermedia
const constraints = {audio: true};
let onSuccess = function(stream) {
if (!audioCtx) {
audioCtx = new AudioContext();
}
console.log(audioCtx);
recordSampleRate = audioCtx.sampleRate;
console.log('sample rate ' + recordSampleRate);
// creates an audio node from the microphone incoming stream
mediaStream = audioCtx.createMediaStreamSource(stream);
console.log(mediaStream);
// https://developer.mozilla.org/en-US/docs/Web/API/AudioContext/createScriptProcessor
// bufferSize: the onaudioprocess event is called when the buffer is full
var bufferSize = 2048;
var numberOfInputChannels = 2;
var numberOfOutputChannels = 2;
if (audioCtx.createScriptProcessor) {
recorder = audioCtx.createScriptProcessor(
bufferSize, numberOfInputChannels, numberOfOutputChannels);
} else {
recorder = audioCtx.createJavaScriptNode(
bufferSize, numberOfInputChannels, numberOfOutputChannels);
}
console.log(recorder);
recorder.onaudioprocess = function(e) {
let samples = new Float32Array(e.inputBuffer.getChannelData(0))
samples = downsampleBuffer(samples, expectedSampleRate);
let buf = new Int16Array(samples.length);
for (var i = 0; i < samples.length; ++i) {
let s = samples[i];
if (s >= 1)
s = 1;
else if (s <= -1)
s = -1;
samples[i] = s;
buf[i] = s * 32767;
}
socket.send(samples);
leftchannel.push(buf);
recordingLength += bufferSize;
};
visualize(stream);
mediaStream.connect(analyser);
recordBtn.onclick = function() {
mediaStream.connect(recorder);
mediaStream.connect(analyser);
recorder.connect(audioCtx.destination);
console.log('recorder started');
recordBtn.style.background = 'red';
stopBtn.disabled = false;
recordBtn.disabled = true;
};
stopBtn.onclick = function() {
console.log('recorder stopped');
socket.send('Done');
console.log('Sent Done');
socket.close();
// stopBtn recording
recorder.disconnect(audioCtx.destination);
mediaStream.disconnect(recorder);
mediaStream.disconnect(analyser);
recordBtn.style.background = '';
recordBtn.style.color = '';
// mediaRecorder.requestData();
stopBtn.disabled = true;
recordBtn.disabled = false;
const clipName =
prompt('Enter a name for your sound clip?', 'My unnamed clip');
const clipContainer = document.createElement('article');
const clipLabel = document.createElement('p');
const audio = document.createElement('audio');
const deleteButton = document.createElement('button');
clipContainer.classList.add('clip');
audio.setAttribute('controls', '');
deleteButton.textContent = 'Delete';
deleteButton.className = 'delete';
if (clipName === null) {
clipLabel.textContent = 'My unnamed clip';
} else {
clipLabel.textContent = clipName;
}
clipContainer.appendChild(audio);
clipContainer.appendChild(clipLabel);
clipContainer.appendChild(deleteButton);
soundClips.appendChild(clipContainer);
audio.controls = true;
let samples = flatten(leftchannel);
const blob = toWav(samples);
leftchannel = [];
const audioURL = window.URL.createObjectURL(blob);
audio.src = audioURL;
console.log('recorder stopped');
deleteButton.onclick = function(e) {
let evtTgt = e.target;
evtTgt.parentNode.parentNode.removeChild(evtTgt.parentNode);
};
clipLabel.onclick = function() {
const existingName = clipLabel.textContent;
const newClipName = prompt('Enter a new name for your sound clip?');
if (newClipName === null) {
clipLabel.textContent = existingName;
} else {
clipLabel.textContent = newClipName;
}
};
};
};
let onError = function(err) {
console.log('The following error occured: ' + err);
};
navigator.mediaDevices.getUserMedia(constraints).then(onSuccess, onError);
} else {
console.log('getUserMedia not supported on your browser!');
alert('getUserMedia not supported on your browser!');
}
function visualize(stream) {
if (!audioCtx) {
audioCtx = new AudioContext();
}
const source = audioCtx.createMediaStreamSource(stream);
if (!analyser) {
analyser = audioCtx.createAnalyser();
analyser.fftSize = 2048;
}
const bufferLength = analyser.frequencyBinCount;
const dataArray = new Uint8Array(bufferLength);
// source.connect(analyser);
// analyser.connect(audioCtx.destination);
draw()
function draw() {
const WIDTH = canvas.width
const HEIGHT = canvas.height;
requestAnimationFrame(draw);
analyser.getByteTimeDomainData(dataArray);
canvasCtx.fillStyle = 'rgb(200, 200, 200)';
canvasCtx.fillRect(0, 0, WIDTH, HEIGHT);
canvasCtx.lineWidth = 2;
canvasCtx.strokeStyle = 'rgb(0, 0, 0)';
canvasCtx.beginPath();
let sliceWidth = WIDTH * 1.0 / bufferLength;
let x = 0;
for (let i = 0; i < bufferLength; i++) {
let v = dataArray[i] / 128.0;
let y = v * HEIGHT / 2;
if (i === 0) {
canvasCtx.moveTo(x, y);
} else {
canvasCtx.lineTo(x, y);
}
x += sliceWidth;
}
canvasCtx.lineTo(canvas.width, canvas.height / 2);
canvasCtx.stroke();
}
}
window.onresize = function() {
canvas.width = mainSection.offsetWidth;
};
window.onresize();
// this function is copied/modified from
// https://gist.github.com/meziantou/edb7217fddfbb70e899e
function flatten(listOfSamples) {
let n = 0;
for (let i = 0; i < listOfSamples.length; ++i) {
n += listOfSamples[i].length;
}
let ans = new Int16Array(n);
let offset = 0;
for (let i = 0; i < listOfSamples.length; ++i) {
ans.set(listOfSamples[i], offset);
offset += listOfSamples[i].length;
}
return ans;
}
// this function is copied/modified from
// https://gist.github.com/meziantou/edb7217fddfbb70e899e
function toWav(samples) {
let buf = new ArrayBuffer(44 + samples.length * 2);
var view = new DataView(buf);
// http://soundfile.sapp.org/doc/WaveFormat/
// F F I R
view.setUint32(0, 0x46464952, true); // chunkID
view.setUint32(4, 36 + samples.length * 2, true); // chunkSize
// E V A W
view.setUint32(8, 0x45564157, true); // format
//
// t m f
view.setUint32(12, 0x20746d66, true); // subchunk1ID
view.setUint32(16, 16, true); // subchunk1Size, 16 for PCM
view.setUint32(20, 1, true); // audioFormat, 1 for PCM
view.setUint16(22, 1, true); // numChannels: 1 channel
view.setUint32(24, expectedSampleRate, true); // sampleRate
view.setUint32(28, expectedSampleRate * 2, true); // byteRate
view.setUint16(32, 2, true); // blockAlign
view.setUint16(34, 16, true); // bitsPerSample
view.setUint32(36, 0x61746164, true); // Subchunk2ID
view.setUint32(40, samples.length * 2, true); // subchunk2Size
let offset = 44;
for (let i = 0; i < samples.length; ++i) {
view.setInt16(offset, samples[i], true);
offset += 2;
}
return new Blob([view], {type: 'audio/wav'});
}
// this function is copied from
// https://github.com/awslabs/aws-lex-browser-audio-capture/blob/master/lib/worker.js#L46
function downsampleBuffer(buffer, exportSampleRate) {
if (exportSampleRate === recordSampleRate) {
return buffer;
}
var sampleRateRatio = recordSampleRate / exportSampleRate;
var newLength = Math.round(buffer.length / sampleRateRatio);
var result = new Float32Array(newLength);
var offsetResult = 0;
var offsetBuffer = 0;
while (offsetResult < result.length) {
var nextOffsetBuffer = Math.round((offsetResult + 1) * sampleRateRatio);
var accum = 0, count = 0;
for (var i = offsetBuffer; i < nextOffsetBuffer && i < buffer.length; i++) {
accum += buffer[i];
count++;
}
result[offsetResult] = accum / count;
offsetResult++;
offsetBuffer = nextOffsetBuffer;
}
return result;
};
... ...
/**
References
https://developer.mozilla.org/en-US/docs/Web/API/FileList
https://developer.mozilla.org/en-US/docs/Web/API/FileReader
https://javascript.info/arraybuffer-binary-arrays
https://developer.mozilla.org/zh-CN/docs/Web/API/WebSocket
https://developer.mozilla.org/en-US/docs/Web/API/WebSocket/send
*/
var socket;
const serverIpInput = document.getElementById('server-ip');
const serverPortInput = document.getElementById('server-port');
const connectBtn = document.getElementById('connect');
const uploadBtn = document.getElementById('file');
function initWebSocket() {
let protocol = 'ws://';
if (window.location.protocol == 'https:') {
protocol = 'wss://'
}
let server_ip = serverIpInput.value;
let server_port = serverPortInput.value;
console.log('protocol: ', protocol);
console.log('server_ip: ', server_ip);
console.log('server_port: ', server_port);
let uri = protocol + server_ip + ':' + server_port;
console.log('uri', uri);
socket = new WebSocket(uri);
// Connection opened
socket.addEventListener('open', function(event) {
console.log('connected');
uploadBtn.disabled = false;
connectBtn.disabled = true;
connectBtn.innerHTML = 'Connected!';
});
// Connection closed
socket.addEventListener('close', function(event) {
console.log('disconnected');
uploadBtn.disabled = true;
connectBtn.disabled = false;
connectBtn.innerHTML = 'Click me to connect!';
});
// Listen for messages
socket.addEventListener('message', function(event) {
console.log('Received message: ', event.data);
document.getElementById('results').value = event.data;
socket.send('Done');
console.log('Sent Done');
socket.close();
});
}
window.onload = (event) => {
console.log('page is fully loaded');
console.log('protocol', window.location.protocol);
console.log('port', window.location.port);
if (window.location.protocol == 'https:') {
document.getElementById('ws-protocol').textContent = 'wss://';
}
serverIpInput.value = window.location.hostname;
serverPortInput.value = window.location.port;
};
connectBtn.onclick = function() {
initWebSocket();
};
function send_header(n) {
const header = new ArrayBuffer(4);
new DataView(header).setInt32(0, n, true /* littleEndian */);
socket.send(new Int32Array(header, 0, 1));
}
function onFileChange() {
var files = document.getElementById('file').files;
if (files.length == 0) {
console.log('No file selected');
return;
}
console.log('files: ' + files);
const file = files[0];
console.log(file);
console.log('file.name ' + file.name);
console.log('file.type ' + file.type);
console.log('file.size ' + file.size);
let reader = new FileReader();
reader.onload = function() {
console.log('reading file!');
let view = new Int16Array(reader.result);
// we assume the input file is a wav file.
// TODO: add some checks here.
let int16_samples = view.subarray(22); // header has 44 bytes == 22 shorts
let num_samples = int16_samples.length;
let float32_samples = new Float32Array(num_samples);
console.log('num_samples ' + num_samples)
for (let i = 0; i < num_samples; ++i) {
float32_samples[i] = int16_samples[i] / 32768.
}
// Send 1024 audio samples per request.
//
// It has two purposes:
// (1) Simulate streaming
// (2) There is a limit on the number of bytes in the payload that can be
// sent by websocket, which is 1MB, I think. We can send a large
// audio file for decoding in this approach.
let buf = float32_samples.buffer
let n = 1024 * 4; // send this number of bytes per request.
console.log('buf length, ' + buf.byteLength);
send_header(buf.byteLength);
for (let start = 0; start < buf.byteLength; start += n) {
socket.send(buf.slice(start, start + n));
}
};
reader.readAsArrayBuffer(file);
}
const clearBtn = document.getElementById('clear');
clearBtn.onclick = function() {
console.log('clicked');
document.getElementById('results').value = '';
};
... ...
<nav class="navbar navbar-expand-lg navbar-light bg-light">
<a class="navbar-brand" href="index.html">Next-gen Kaldi demo</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarSupportedContent">
<ul class="navbar-nav mr-auto">
<li class="nav-item active">
<a class="nav-link" href="index.html">Home <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item">
<a class="nav-link" href="upload.html">Upload</a>
</li>
<li class="nav-item">
<a class="nav-link" href="streaming_record.html">Streaming-Record</a>
</li>
<li class="nav-item">
<a class="nav-link" href="offline_record.html">Offline-Record</a>
</li>
</ul>
</div>
</nav>
... ...
<!doctype html>
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8"></meta>
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"></meta>
<!-- Bootstrap CSS -->
<link rel="stylesheet"
href="./css/bootstrap.min.css"
integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T"
crossorigin="anonymous">
</link>
<script src="./js/jquery-3.6.0.min.js" integrity="sha256-/xUj+3OJU5yExlq6GSYGSHk7tPXikynS7ogEvDej/m4=" crossorigin="anonymous"></script>
<title>Next-gen Kaldi demo (Upload file for recognition)</title>
</head>
<body>
<div id="nav"></div>
<script>
$(function(){
$("#nav").load("nav-partial.html");
});
</script>
<h3>Recognition from offline recordings</h3>
<div class="container">
<div class="input-group mb-1">
<div class="input-group-prepend">
<button class="btn btn-block btn-primary" type="button" id="connect">Click me to connect</button>
</div>
<span class="input-group-text" id="ws-protocol">ws://</span>
<input type="text" id="server-ip" class="form-control" placeholder="Sherpa server IP, e.g., localhost" aria-label="sherpa server IP">
<span class="input-group-text">:</span>
<input type="text" id="server-port" class="form-control" placeholder="Sherpa server port, e.g., 6006" aria-label="sherpa server port">
</div>
<div class="row">
<div class="col-12">
<canvas id="canvas" height="60px" display="block" margin-bottom="0.5rem"></canvas>
</div>
</div>
<div class="row">
<div class="col">
<button class="btn btn-primary btn-block" id="offline_record">Offline-Record</button>
</div>
<div class="col">
<button class="btn btn-primary btn-block" id="offline_stop">Offline-Stop</button>
</div>
</div>
</div>
<div class="mb-3">
<label for="results" class="form-label">Recognition results</label>
<textarea class="form-control" id="results" rows="8"></textarea>
</div>
<button class="btn btn-primary btn-block" id="clear">Clear results</button>
<section flex="1" overflow="auto" id="sound-clips">
</section>
<!-- Optional JavaScript -->
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src="./js/popper.min.js"
integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1"
crossorigin="anonymous">
</script>
<script src="./js/bootstrap.min.js"
integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM"
crossorigin="anonymous">
</script>
<script src="./js/offline_record.js"> </script>
</body>
</html>
... ...
#!/usr/bin/env python3
# Code in this file is modified from
# https://stackoverflow.com/questions/19705785/python-3-simple-https-server
import argparse
import http.server
import ssl
import sys
from pathlib import Path
"""
Usage:
./start-https-server.py \
--server-address 0.0.0.0 \
--server-port 6007 \
--cert ./cert.pem
"""
def get_args():
parser = argparse.ArgumentParser()
parser.add_argument(
"--server-address",
type=str,
default="0.0.0.0",
help="""IP address which this server will bind to""",
)
parser.add_argument(
"--server-port",
type=int,
default=6007,
help="""Port number on which this server will listen""",
)
parser.add_argument(
"--certificate",
type=str,
default="cert.pem",
help="""Path to the X.509 certificate. You can use
./generate-certificate.py to generate it""",
)
return parser.parse_args()
def main():
args = get_args()
print(f"{vars(args)}")
server_address = (args.server_address, args.server_port)
httpd = http.server.HTTPServer(
server_address, http.server.SimpleHTTPRequestHandler
)
if not Path(args.certificate).is_file():
print("Please run ./generate-certificate.py to generate a certificate")
sys.exit(-1)
httpd.socket = ssl.wrap_socket(
httpd.socket,
server_side=True,
certfile=args.certificate,
ssl_version=ssl.PROTOCOL_TLS,
)
print(
"The server is listening at the following address:\n"
f"https://{args.server_address}:{args.server_port}"
)
httpd.serve_forever()
if __name__ == "__main__":
main()
... ...
<!doctype html>
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8"></meta>
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"></meta>
<!-- Bootstrap CSS -->
<link rel="stylesheet"
href="./css/bootstrap.min.css"
integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T"
crossorigin="anonymous">
</link>
<script src="./js/jquery-3.6.0.min.js" integrity="sha256-/xUj+3OJU5yExlq6GSYGSHk7tPXikynS7ogEvDej/m4=" crossorigin="anonymous"></script>
<title>Next-gen Kaldi demo (Upload file for recognition)</title>
</head>
<body>
<div id="nav"></div>
<script>
$(function(){
$("#nav").load("nav-partial.html");
});
</script>
<h3>Recognition from real-time recordings</h3>
<div class="container">
<div class="input-group mb-1">
<div class="input-group-prepend">
<button class="btn btn-block btn-primary" type="button" id="connect">Click me to connect</button>
</div>
<span class="input-group-text" id="ws-protocol">ws://</span>
<input type="text" id="server-ip" class="form-control" placeholder="Sherpa server IP, e.g., localhost" aria-label="sherpa server IP">
<span class="input-group-text">:</span>
<input type="text" id="server-port" class="form-control" placeholder="Sherpa server port, e.g., 6006" aria-label="sherpa server port">
</div>
<div class="row">
<div class="col-12">
<canvas id="canvas" height="60px" display="block" margin-bottom="0.5rem"></canvas>
</div>
</div>
<div class="row">
<div class="col">
<button class="btn btn-primary btn-block" id="streaming_record">Streaming-Record</button>
</div>
<div class="col">
<button class="btn btn-primary btn-block" id="streaming_stop">Streaming-Stop</button>
</div>
</div>
</div>
<div class="mb-3">
<label for="results" class="form-label">Recognition results</label>
<textarea class="form-control" id="results" rows="8"></textarea>
</div>
<button class="btn btn-primary btn-block" id="clear">Clear results</button>
<section flex="1" overflow="auto" id="sound-clips">
</section>
<!-- Optional JavaScript -->
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src="./js/popper.min.js"
integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1"
crossorigin="anonymous">
</script>
<script src="./js/bootstrap.min.js"
integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM"
crossorigin="anonymous">
</script>
<script src="./js/streaming_record.js"> </script>
</body>
</html>
... ...
<!doctype html>
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8"></meta>
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"></meta>
<!-- Bootstrap CSS -->
<link rel="stylesheet"
href="./css/bootstrap.min.css"
integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T"
crossorigin="anonymous">
</link>
<script src="./js/jquery-3.6.0.min.js" integrity="sha256-/xUj+3OJU5yExlq6GSYGSHk7tPXikynS7ogEvDej/m4=" crossorigin="anonymous"></script>
<title>Next-gen Kaldi demo (Upload file for recognition)</title>
</head>
<body>
<div id="nav"></div>
<script>
$(function(){
$("#nav").load("nav-partial.html");
});
</script>
<h3>Recognition from a selected file</h3>
<div class="input-group mb-1">
<div class="input-group-prepend">
<button class="btn btn-block btn-primary" type="button" id="connect">Click me to connect</button>
</div>
<span class="input-group-text" id="ws-protocol">ws://</span>
<input type="text" id="server-ip" class="form-control" placeholder="Sherpa server IP, e.g., localhost" aria-label="sherpa server IP">
<span class="input-group-text">:</span>
<input type="text" id="server-port" class="form-control" placeholder="Sherpa server port, e.g., 6006" aria-label="sherpa server port">
</div>
<form>
<div class="mb-3">
<label for="file" class="form-label">Select file</label>
<input class="form-control" type="file" id="file" accept=".wav" onchange="onFileChange()" disabled="true"></input>
</div>
<div class="mb-3">
<label for="results" class="form-label">Recognition results</label>
<textarea class="form-control" id="results" rows="8"></textarea>
</div>
<button class="btn btn-primary btn-block" id="clear">Clear results</button>
</form>
<!-- Optional JavaScript -->
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src="./js/popper.min.js"
integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1"
crossorigin="anonymous">
</script>
<script src="./js/bootstrap.min.js"
integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM"
crossorigin="anonymous">
</script>
<script src="./js/upload.js"> </script>
</body>
</html>
... ...
from _sherpa_onnx import Display
from .online_recognizer import OnlineRecognizer
from .online_recognizer import OnlineStream
from .offline_recognizer import OfflineRecognizer
... ...
... ... @@ -127,6 +127,7 @@ class OnlineRecognizer(object):
)
self.recognizer = _Recognizer(recognizer_config)
self.config = recognizer_config
def create_stream(self):
return self.recognizer.create_stream()
... ...