rocDecode api defintions added for decoder and parser (#6)

* rocDecode api defintions added for decoder and parser

* addressed review comments and changed struct names to CamelCase

* minot reformatting

src/parser/parser_handle.h

@@ -0,0 +1,61 @@
+/*
+Copyright (c) 2023 - 2023 Advanced Micro Devices, Inc. All rights reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+#pragma once
+
+#include <memory>
+#include <string>
+#include "rocparser.h"
+
+class RocVideoParser {
+public:
+    RocVideoParser() {};    // default constructor
+    RocVideoParser(RocdecParserParams *pParams): parser_params_(*pParams) {};
+    ~RocVideoParser();
+    void SetParserParams(RocdecParserParams *pParams) { parser_params_ = *pParams; };
+    RocdecParserParams *GetParserParams() {return &parser_params_;};
+    rocDecStatus ParseVideoData(RocdecSourceDataPacket *pData);
+
+private:
+    RocdecParserParams parser_params_;
+};
+
+struct RocParserHandle {
+public:    
+    explicit RocParserHandle() {};   // default constructor
+    ~RocParserHandle() { clear_errors(); }
+    std::shared_ptr<RocVideoParser> roc_parser;    // class instantiation
+    bool no_error() { return error.empty(); }
+    const char* error_msg() { return error.c_str(); }
+    void capture_error(const std::string& err_msg) { error = err_msg; }
+    bool set_parser_params(RocdecParserParams *pParams) {
+      if(roc_parser) {
+        roc_parser->SetParserParams(pParams); 
+        return true;
+      } else {
+         return false;
+      }
+    }
+
+private:
+    void clear_errors() { error = "";}
+    std::string error;
+};