[Model] add vsr serials models (#518)

* [Model] add vsr serials models

Signed-off-by: ChaoII <849453582@qq.com>

* [Model] add vsr serials models

Signed-off-by: ChaoII <849453582@qq.com>

* fix build problem

Signed-off-by: ChaoII <849453582@qq.com>

* fix code style

Signed-off-by: ChaoII <849453582@qq.com>

* modify according to review suggestions

Signed-off-by: ChaoII <849453582@qq.com>

* modify vsr trt example

Signed-off-by: ChaoII <849453582@qq.com>

* update sr directory

* fix BindPPSR

* add doxygen comment

* add sr unit test

* update model file url

Signed-off-by: ChaoII <849453582@qq.com>
Co-authored-by: Jason <jiangjiajun@baidu.com>

examples/vision/sr/basicvsr/python/README.md

@@ -0,0 +1,61 @@
+# BasicVSR Python部署示例
+
+在部署前，需确认以下两个步骤
+
+- 1. 软硬件环境满足要求，参考[FastDeploy环境要求](../../../../../docs/cn/build_and_install/download_prebuilt_libraries.md)  
+- 2. FastDeploy Python whl包安装，参考[FastDeploy Python安装](../../../../../docs/cn/build_and_install/download_prebuilt_libraries.md)
+
+本目录下提供`infer.py`快速完成BasicVSR在CPU/GPU，以及GPU上通过TensorRT加速部署的示例。执行如下脚本即可完成
+
+```bash
+#下载部署示例代码
+git clone https://github.com/PaddlePaddle/FastDeploy.git
+cd FastDeploy/examples/vision/sr/basicvsr/python
+
+# 下载BasicVSR模型文件和测试视频
+wget https://bj.bcebos.com/paddlehub/fastdeploy/BasicVSR_reds_x4.tar
+tar -xvf BasicVSR_reds_x4.tar
+wget https://bj.bcebos.com/paddlehub/fastdeploy/vsr_src.mp4
+# CPU推理
+python infer.py --model BasicVSR_reds_x4 --video person.mp4 --frame_num 2 --device cpu
+# GPU推理
+python infer.py --model BasicVSR_reds_x4 --video person.mp4 --frame_num 2 --device gpu
+# GPU上使用TensorRT推理 （注意：TensorRT推理第一次运行，有序列化模型的操作，有一定耗时，需要耐心等待）
+python infer.py --model BasicVSR_reds_x4 --video person.mp4 --frame_num 2 --device gpu --use_trt True
+```
+
+## BasicVSR Python接口
+
+```python
+fd.vision.sr.BasicVSR(model_file, params_file, runtime_option=None, model_format=ModelFormat.PADDLE)
+```
+
+BasicVSR模型加载和初始化，其中model_file和params_file为训练模型导出的Paddle inference文件，具体请参考其文档说明[模型导出](https://github.com/PaddlePaddle/PaddleGAN/blob/develop/docs/zh_CN/tutorials/video_super_resolution.md)
+
+**参数**
+
+> * **model_file**(str): 模型文件路径
+> * **params_file**(str): 参数文件路径
+> * **runtime_option**(RuntimeOption): 后端推理配置，默认为None，即采用默认配置
+> * **model_format**(ModelFormat): 模型格式，默认为Paddle格式
+
+### predict函数
+
+> ```python
+> BasicVSR.predict(frames)
+> ```
+>
+> 模型预测结口，输入图像直接输出检测结果。
+>
+> **参数**
+>
+> > * **frames**(list[np.ndarray]): 输入数据，注意需为HWC，BGR格式, frames为视频帧序列
+
+> **返回** list[np.ndarray] 为超分后的视频帧序列
+
+
+## 其它文档
+
+- [BasicVSR 模型介绍](..)
+- [BasicVSR C++部署](../cpp)
+- [如何切换模型推理后端引擎](../../../../../docs/cn/faq/how_to_change_backend.md)