parser high level class implementation (#10)

* rocDecode api defintions added for decoder and parser

* addressed review comments and changed struct names to CamelCase

* minot reformatting

* parser high level class implementation

[ROCm/rocdecode commit: 0a991c1776]

projects/rocdecode/src/parser/roc_video_parser.h

@@ -0,0 +1,53 @@
+/*
+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"
+#include "../commons.h"
+
+/**
+ * @brief Base class for video parsing
+ * 
+ */
+class RocVideoParser {
+public:
+    RocVideoParser() {};    // default constructor
+    RocVideoParser(RocdecParserParams *pParams) : parser_params_(pParams) {};
+    virtual ~RocVideoParser() = default ;
+    virtual void SetParserParams(RocdecParserParams *pParams) { parser_params_ = pParams; };
+    RocdecParserParams *GetParserParams() {return parser_params_;};
+    virtual rocDecStatus Initialize(RocdecParserParams *pParams);
+    virtual rocDecStatus ParseVideoData(RocdecSourceDataPacket *pData) = 0;     // pure virtual: implemented by derived class
+
+protected:
+    RocdecParserParams *parser_params_ = nullptr;
+    /**
+     * @brief callback function pointers for the parser
+     * 
+     */
+    PFNVIDSEQUENCECALLBACK pfn_sequece_cb_;             /**< Called before decoding frames and/or whenever there is a fmt change */
+    PFNVIDDECODECALLBACK pfn_decode_picture_cb_;        /**< Called when a picture is ready to be decoded (decode order)         */
+    PFNVIDDISPLAYCALLBACK pfn_display_picture_cb_;      /**< Called whenever a picture is ready to be displayed (display order)  */
+    PFNVIDSEIMSGCALLBACK pfn_get_sei_message_cb_;       /**< Called when all SEI messages are parsed for particular frame        */
+};