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public/scenefilecache/SceneImageFile.h

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: A Scene Image file aggregates all the compiled binary VCD files into
+// a single file.
+//
+//=====================================================================================//
+#ifndef SCENE_IMAGE_FILE_H
+#define SCENE_IMAGE_FILE_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+#include "commonmacros.h"
+#include "tier1/checksum_crc.h"
+
+#define SCENE_IMAGE_ID			MAKEID( 'V','S','I','F' )
+#define SCENE_IMAGE_VERSION		2
+
+// scene summary: cached calcs for commmon startup queries, variable sized
+struct SceneImageSummary_t
+{
+	unsigned int	msecs;
+	int				numSounds;
+	int				soundStrings[1];	// has numSounds
+};
+
+// stored sorted by crc filename for binary search
+struct SceneImageEntry_t
+{
+	CRC32_t	crcFilename;			// expected to be normalized as scenes\???.vcd
+	int		nDataOffset;			// offset to dword aligned data from start
+	int		nDataLength;
+	int		nSceneSummaryOffset;	// offset to summary
+};
+
+struct SceneImageHeader_t
+{
+	int nId;
+	int	nVersion;
+	int nNumScenes;				// number of scene files
+	int	nNumStrings;			// number of unique strings in table
+	int nSceneEntryOffset;
+
+	inline const char *String( short iString )
+	{
+		if ( iString < 0 || iString >= nNumStrings )
+		{
+			Assert( 0 );
+			return NULL;
+		}
+
+		// access string table (after header) to access pool
+		unsigned int *pTable = (unsigned int *)((byte *)this + sizeof( SceneImageHeader_t ));
+		return (char *)this + pTable[iString];
+	}
+};
+
+#endif // SCENE_IMAGE_FILE_H