add API only for decode parser for HW decoding support

codec/api/svc/codec_api.h

@@ -106,6 +106,14 @@ class ISVCDecoder {
       unsigned char** ppDst,
       SBufferInfo* pDstInfo) = 0;
 
+  /*
+   * This function parse input bitstream only, and rewrite possible SVC syntax to AVC syntax
+   * return: 0 - success; otherwise -failed;
+   */
+  virtual DECODING_STATE EXTAPI DecodeParser (const unsigned char* pSrc,
+      const int iSrcLen,
+      SParserBsInfo* pDstInfo) = 0;
+
   /*
    *  this API does not work for now!! This is for future use to support non-I420 color format output.
    */
@@ -169,6 +177,10 @@ DECODING_STATE (*DecodeFrame2) (ISVCDecoder*, const unsigned char* pSrc,
                                 unsigned char** ppDst,
                                 SBufferInfo* pDstInfo);
 
+DECODING_STATE (*DecodeParser) (ISVCDecoder*, const unsigned char* pSrc,
+                                const int iSrcLen,
+                                SParserBsInfo* pDstInfo);
+
 DECODING_STATE (*DecodeFrameEx) (ISVCDecoder*, const unsigned char* pSrc,
                                  const int iSrcLen,
                                  unsigned char* pDst,