[runtime] Support webui (#204)

Co-authored-by: ShengqiangLi <[email protected]>

runtime/web/README.md

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+## WeTTS Web Demo
+
+* How to install? `pip install -r requirements.txt`
+* How to start? `python app.py`

runtime/web/app.py

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+# Copyright (c) 2024, Shengqiang Li ([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 gradio as gr
+from wetts.cli.model import load_model
+
+
+def main():
+    title = "End-to-End Speech Synthesis in WeTTS | 基于 WeTTS 的端到端语音合成"
+    description = "WeTTS Demo"
+    inputs = [gr.Textbox(label="text")]
+    phones = gr.Textbox(label="phones")
+    audio = gr.Audio(label="audio")
+    outputs = [phones, audio]
+    gr.Interface(
+        synthesis,
+        title=title,
+        description=description,
+        inputs=inputs,
+        outputs=outputs
+    ).launch(server_name='0.0.0.0', share=True)
+
+
+def synthesis(text):
+    model = load_model()
+    phones, audio = model.synthesis(text)
+    sampling_rate = 16000
+    return ' '.join(phones), (sampling_rate, audio)
+
+
+if __name__ == '__main__':
+    main()

runtime/web/requirements.txt

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+git+https://github.com/wenet-e2e/wetts.git
+requests
+gradio