Changeset 616 in SHVCSoftware for branches/SHM-5.1-dev/source/Lib/TLibDecoder

Timestamp:

18 Feb 2014, 14:07:05 (12 years ago)

Author:

nokia

Message:

JCTVC-P0138: Implementation of use_alt_cpb_params_flag

Location:

branches/SHM-5.1-dev/source/Lib/TLibDecoder

Files:

• SEIread.cpp (modified) (2 diffs)
• SEIread.h (modified) (1 diff)

branches/SHM-5.1-dev/source/Lib/TLibDecoder/SEIread.cpp

@@ -380 +380 @@
 }
 
+#if P0138_USE_ALT_CPB_PARAMS_FLAG
+/**
+ * Check if SEI message contains payload extension
+ */
+Bool SEIReader::xPayloadExtensionPresent()
+{
+  Int payloadBitsRemaining = getBitstream()->getNumBitsLeft();
+  Bool payloadExtensionPresent = false;
+
+  if (payloadBitsRemaining > 8)
+  {
+    payloadExtensionPresent = true;
+  }
+  else
+  {
+    Int finalBits = getBitstream()->peekBits(payloadBitsRemaining);
+    while (payloadBitsRemaining && (finalBits & 1) == 0)
+    {
+      payloadBitsRemaining--;
+      finalBits >>= 1;
+    }
+    payloadBitsRemaining--;
+    if (payloadBitsRemaining > 0)
+    {
+      payloadExtensionPresent = true;
+    }
+  }
+
+  return payloadExtensionPresent;
+}
+#endif
+
 /**
  * parse bitstream bs and unpack a user_data_unregistered SEI message
@@ -536 +568 @@
     }
   }
+
+#if P0138_USE_ALT_CPB_PARAMS_FLAG
+  sei.m_useAltCpbParamsFlag = false;
+  sei.m_useAltCpbParamsFlagPresent = false;
+  if (xPayloadExtensionPresent())
+  {
+    READ_FLAG (code, "use_alt_cpb_params_flag");
+    sei.m_useAltCpbParamsFlag = code;
+    sei.m_useAltCpbParamsFlagPresent = true;
+  }
+#endif
+
   xParseByteAlign();
 }

branches/SHM-5.1-dev/source/Lib/TLibDecoder/SEIread.h

@@ -67 +67 @@
   Void xReadSEImessage                (SEIMessages& seis, const NalUnitType nalUnitType, TComSPS *sps);
 #endif
+#if P0138_USE_ALT_CPB_PARAMS_FLAG
+  Bool xPayloadExtensionPresent       ();
+#endif
   Void xParseSEIuserDataUnregistered  (SEIuserDataUnregistered &sei, UInt payloadSize);
   Void xParseSEIActiveParameterSets   (SEIActiveParameterSets  &sei, UInt payloadSize);