Initial community commit

Src/Plugins/Input/in_flv/FLVHeader.cpp

@@ -0,0 +1,41 @@
+#include "FLVHeader.h"
+#include "FLVUtil.h"
+/*
+(c) 2006 Nullsoft, Inc.
+Author: Ben Allison benski@nullsoft.com 
+*/
+
+#define FLV_BITMASK_AUDIO 0x4
+#define FLV_BITMASK_VIDEO 0x1
+
+/*
+FLV Header spec
+
+Signature - uint8[3] - must equal "FLV"
+Version   - uint8    - only known version is 1
+Flags     - uint8    - bitmask, 4 is audio, 1 is video
+Offset    - uint32 	 - total size of header (9), big endian
+*/
+
+
+
+
+bool FLVHeader::Read(uint8_t *data, size_t size)
+{
+	if (size < 9)
+		return false; // too small to be an FLV header
+
+	if (data[0] != 'F' || data[1] != 'L' || data[2] != 'V')
+		return false; // invalid signature
+
+	version = data[3];
+
+	hasAudio = !!(data[4] & FLV_BITMASK_AUDIO);
+	hasVideo = data[4] & FLV_BITMASK_VIDEO;
+
+	headerSize = FLV::Read32(&data[5]);
+	if (headerSize != 9)
+		return false;
+
+	return true;
+}