Changed rocDecode API header variable naming to Google C++ style. (#196)

* * rocDecode: Changed rocDecode API header variable naming to Google C++ style.

* * rocDecode: Unified AVC/H264 naming to AVC. Minor naming changes on HEVC related names.

* * rocDecode: Minor comment fix based on code review.

src/parser/roc_video_parser.cpp

@@ -42,10 +42,10 @@ rocDecStatus RocVideoParser::Initialize(RocdecParserParams *pParams) {
         return ROCDEC_NOT_INITIALIZED;
     }
     // Initialize callback function pointers
-    pfn_sequece_cb_         = pParams->pfnSequenceCallback;             /**< Called before decoding frames and/or whenever there is a fmt change */
-    pfn_decode_picture_cb_  = pParams->pfnDecodePicture;        /**< Called when a picture is ready to be decoded (decode order)         */
-    pfn_display_picture_cb_ = pParams->pfnDisplayPicture;      /**< Called whenever a picture is ready to be displayed (display order)  */
-    pfn_get_sei_message_cb_ = pParams->pfnGetSEIMsg;       /**< Called when all SEI messages are parsed for particular frame        */
+    pfn_sequece_cb_         = pParams->pfn_sequence_callback;             /**< Called before decoding frames and/or whenever there is a fmt change */
+    pfn_decode_picture_cb_  = pParams->pfn_decode_picture;        /**< Called when a picture is ready to be decoded (decode order)         */
+    pfn_display_picture_cb_ = pParams->pfn_display_picture;      /**< Called whenever a picture is ready to be displayed (display order)  */
+    pfn_get_sei_message_cb_ = pParams->pfn_get_sei_msg;       /**< Called when all SEI messages are parsed for particular frame        */
 
     parser_params_ = *pParams;