Changed directory structure and renamed applications

- autopilot -> drone_controller
- rtsp_ai_player -> ai_controller
- added top level qmake project file
- updated documentation
- moved small demo applications from tmp/ to misc/

ai_controller/src-opi5/file_utils.h

@@ -0,0 +1,48 @@
+#ifndef _RKNN_MODEL_ZOO_FILE_UTILS_H_
+#define _RKNN_MODEL_ZOO_FILE_UTILS_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief Read data from file
+ * 
+ * @param path [in] File path
+ * @param out_data [out] Read data
+ * @return int -1: error; > 0: Read data size
+ */
+int read_data_from_file(const char *path, char **out_data);
+
+/**
+ * @brief Write data to file
+ * 
+ * @param path [in] File path
+ * @param data [in] Write data
+ * @param size [in] Write data size
+ * @return int 0: success; -1: error
+ */
+int write_data_to_file(const char *path, const char *data, unsigned int size);
+
+/**
+ * @brief Read all lines from text file
+ * 
+ * @param path [in] File path
+ * @param line_count [out] File line count
+ * @return char** String array of all lines, remeber call free_lines() to release after used
+ */
+char** read_lines_from_file(const char* path, int* line_count);
+
+/**
+ * @brief Free lines string array
+ * 
+ * @param lines [in] String array
+ * @param line_count [in] Line count
+ */
+void free_lines(char** lines, int line_count);
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
+#endif //_RKNN_MODEL_ZOO_FILE_UTILS_H_