Added initial code for VP9 support. (#442)

* * rocDecode/VP9: Initial code for VP9.
 - Added structures for VA-API.
 - Added defines for uncompressed header and parsing functions.

* * rocDecode/VP9: Added decode frame call to VA-API.

* * rocDecode/VP9: Added new sequence notification function.

* * rocDecode/VP9: Intra decode started to work.

* * rocDecode/VP9: Minor changes based on review comments.

---------

Co-authored-by: Kiriti Gowda <kiritigowda@gmail.com>

[ROCm/rocdecode commit: 3eb6bc2192]

projects/rocdecode/src/parser/parser_handle.h

@@ -28,6 +28,7 @@ THE SOFTWARE.
 #include "avc_parser.h"
 #include "av1_parser.h"
 #include "hevc_parser.h"
+#include "vp9_parser.h"
 
 class RocParserHandle {
 public:
@@ -51,6 +52,9 @@ private:
             case rocDecVideoCodec_HEVC:
                 roc_parser_ = std::make_shared<HevcVideoParser>();
                 break;
+            case rocDecVideoCodec_VP9:
+                roc_parser_ = std::make_shared<Vp9VideoParser>();
+                break;
             case rocDecVideoCodec_AV1:
                 roc_parser_ = std::make_shared<Av1VideoParser>();
                 break;