sequence callback function (#25)

* seq callback function

* bug fix

* changing some params for callback

* review comments

* switch case

* fixing minor border cases

[ROCm/rocdecode commit: 47ede638a3]

projects/rocdecode/src/parser/roc_video_parser.h

@@ -55,6 +55,8 @@ protected:
     uint32_t pic_width_;
     uint32_t pic_height_;
     bool pic_dimension_changed_;
+
+    RocdecVideoFormat video_format_params_;
 };
 
 enum ParserSeekOrigin {