[Streamer] Basic framework, YAML parser, ppyoloe demo and video decoder demo (#863)

* support trt installed in sys dir

* streamer init

* link elements and run

* create source bin

* add config

* restruct dirs

* set property

* link elements

* integrate perf

* add bbox parser

* parse yaml to string, video decoder

* use try pull for decoder and nits

* streamer ppyoloe cpp

* update readme

* video decoder cpp dir

* add cn readme

* update readme

* cmake nits

* refactor perf measurement

streamer/examples/ppyoloe/cpp/README_CN.md

@@ -0,0 +1,44 @@
+简体中文 | [English](README_EN.md)
+
+# FastDeploy Streamer PP-YOLOE C++ Example
+
+## 编译和运行
+
+1. 需要先FastDeploy Streamer, 请参考[README](../../../README.md)
+
+2. 编译Example
+```
+mkdir build && cd build
+cmake .. -DFASTDEPLOY_INSTALL_DIR=[PATH-OF-FASTDEPLOY-INSTALL-DIR]
+make -j
+```
+
+3. 下载模型
+```
+wget https://bj.bcebos.com/paddlehub/fastdeploy/ppyoloe_crn_l_300e_coco_onnx_without_scale_factor.tgz
+tar xvf ppyoloe_crn_l_300e_coco_onnx_without_scale_factor.tgz
+mv ppyoloe_crn_l_300e_coco_onnx_without_scale_factor/ model/
+```
+
+4. 运行
+```
+cp ../nvinfer_config.txt .
+cp ../streamer_cfg.yml .
+./streamer_demo
+```
+
+## 导出ONNX模型，不包含NMS和scale factor
+```
+# 导出Paddle推理模型，exclude_nms=True and trt=True
+git clone https://github.com/PaddlePaddle/PaddleDetection.git
+cd PaddleDetection
+python tools/export_model.py -c configs/ppyoloe/ppyoloe_crn_l_300e_coco.yml -o  weights=https://paddledet.bj.bcebos.com/models/ppyoloe_crn_l_300e_coco.pdparams exclude_nms=True trt=True --output_dir inference_model
+
+# 转换为ONNX
+paddle2onnx --model_dir inference_model/ppyoloe_crn_l_300e_coco/  --model_filename model.pdmodel  --params_filename model.pdiparams  --save_file ppyoloe.onnx  --deploy_backend tensorrt  --enable_dev_version True
+
+# 裁剪ONNX，删除scale factor
+git clone https://github.com/PaddlePaddle/Paddle2ONNX.git
+cd Paddle2ONNX
+python tools/onnx/prune_onnx_model.py --model ../PaddleDetection/ppyoloe.onnx --output_names concat_14.tmp_0 p2o.Mul.245 --save_file ppyoloe_without_scale_factor.onnx
+```