[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/video_decoder/cpp/main.cc

@@ -0,0 +1,43 @@
+// Copyright (c) 2022 PaddlePaddle Authors. 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.
+
+#include "fd_streamer.h"
+#include "fastdeploy/utils/perf.h"
+#include <opencv2/opencv.hpp>
+
+int main(int argc, char* argv[]) {
+  auto streamer = fastdeploy::streamer::FDStreamer();
+  streamer.Init("streamer_cfg.yml");
+  streamer.RunAsync();
+  int count = 0;
+  fastdeploy::FDTensor tensor;
+  fastdeploy::TimeCounter tc;
+  tc.Start();
+  while (1) {
+    bool ret = streamer.TryPullFrame(tensor);
+    if (!ret) {
+      if (streamer.Destroyed()) break;
+      std::this_thread::sleep_for(std::chrono::milliseconds(1));
+      continue;
+    }
+    count++;
+    tensor.PrintInfo();
+    cv::Mat mat(tensor.shape[0], tensor.shape[1], CV_8UC3, tensor.Data());
+    cv::imwrite("out/" + std::to_string(count) + ".jpg", mat);
+  }
+  std::cout << "Total number of frames: " << count << std::endl;
+  tc.End();
+  tc.PrintInfo();
+  return 0;
+}