1 files changed, 85 insertions, 0 deletions
diff --git a/public/xwvfile.h b/public/xwvfile.h
new file mode 100644
index 0000000..c27bad0
--- /dev/null
+++ b/public/xwvfile.h
@@ -0,0 +1,85 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+//=============================================================================
+
+#ifndef XWVFILE_H
+#define XWVFILE_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+#pragma pack(1)
+
+#define XWV_ID		(('X'<<24)|('W'<<16)|('V'<<8)|(' '<<0))
+#define XWV_VERSION 4
+
+enum xwvSampleRate_t
+{
+	XWV_RATE_11025 = 0,
+	XWV_RATE_22050 = 1,
+	XWV_RATE_44100 = 2,
+};
+
+enum xwvFormat_t
+{
+	XWV_FORMAT_PCM = 0,
+	XWV_FORMAT_XMA = 1,
+	XWV_FORMAT_ADPCM = 2,
+};
+
+// generated in big-endian
+struct xwvHeader_t
+{
+	unsigned int	id;
+	unsigned int	version;
+	unsigned int	headerSize;			// header only
+	unsigned int	staticDataSize;		// follows header
+	unsigned int	dataOffset;			// start of samples, possibly sector aligned
+	unsigned int	dataSize;			// length of samples in bytes
+	unsigned int	numDecodedSamples;	// for duration calcs
+	int				loopStart;			// -1 = no loop, offset of loop in samples
+	unsigned short	loopBlock;			// the xma block where the loop starts 
+	unsigned short	numLeadingSamples;	// number of leading samples in the loop block to discard
+	unsigned short	numTrailingSamples;	// number of trailing samples at the final block to discard
+	unsigned short	vdatSize;			// follows seek table
+	byte			format;
+	byte			bitsPerSample;
+	byte			sampleRate;
+	byte			channels;
+	byte			quality;
+	byte			bHasSeekTable;		// indicates presence, follows header
+	byte			padding[2];			// created as 0
+
+	inline unsigned int GetPreloadSize() { return headerSize + staticDataSize; }
+
+	inline int GetBitsPerSample() const { return bitsPerSample; }
+
+	int GetSampleRate() const
+	{
+		int rates[] = {11025, 22050, 44100};
+		int rate = sampleRate;
+		return rates[rate]; 
+	}
+	
+	inline int GetChannels() const { return channels; }
+
+	void SetSampleRate( int sampleRateIn )
+	{
+		byte rate = ( sampleRateIn == 11025 ) ? XWV_RATE_11025 : ( sampleRateIn==22050 )? XWV_RATE_22050 : XWV_RATE_44100;
+		sampleRate = rate;
+	}
+
+	inline void SetChannels( int channelsIn ) { channels = channelsIn; }
+
+	inline int GetSeekTableSize()
+	{
+		// seek table is indexed by packets
+		return bHasSeekTable ? ( dataSize / 2048 ) * sizeof( int ) : 0;
+	}
+};
+
+#pragma pack()
+
+#endif // XWVFILE_H