engine: move engine/audio/public to public/ directory

engine/audio/voice_wavefile.cpp

@@ -0,0 +1,119 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#undef fopen
+#include <stdio.h>
+#include "voice_wavefile.h"
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+static unsigned long ReadDWord(FILE * fp) 
+{
+	unsigned long ret;  
+	fread( &ret, 4, 1, fp );
+	return ret;
+}
+
+static unsigned short ReadWord(FILE * fp) 
+{
+	unsigned short ret; 
+	fread( &ret, 2, 1, fp );
+	return ret;
+}
+
+static void WriteDWord(FILE * fp, unsigned long val) 
+{
+	fwrite( &val, 4, 1, fp );
+}
+
+static void WriteWord(FILE * fp, unsigned short val) 
+{
+	fwrite( &val, 2, 1, fp );
+}
+
+
+
+bool ReadWaveFile(
+	const char *pFilename,
+	char *&pData,
+	int &nDataBytes,
+	int &wBitsPerSample,
+	int &nChannels,
+	int &nSamplesPerSec)
+{
+	FILE * fp = fopen(pFilename, "rb");
+	if(!fp)
+		return false;
+
+	fseek( fp, 22, SEEK_SET );
+	
+	nChannels = ReadWord(fp);
+	nSamplesPerSec = ReadDWord(fp);
+
+	fseek(fp, 34, SEEK_SET);
+	wBitsPerSample = ReadWord(fp);
+
+	fseek(fp, 40, SEEK_SET);
+	nDataBytes = ReadDWord(fp);
+	ReadDWord(fp);
+	pData = new char[nDataBytes];
+	if(!pData)
+	{
+		fclose(fp);
+		return false;
+	}
+	fread(pData, nDataBytes, 1, fp);
+	fclose( fp );
+	return true;
+}
+
+bool WriteWaveFile(
+	const char *pFilename, 
+	const char *pData, 
+	int nBytes, 
+	int wBitsPerSample, 
+	int nChannels, 
+	int nSamplesPerSec)
+{
+	FILE * fp = fopen(pFilename, "wb");
+	if(!fp)
+		return false;
+
+	// Write the RIFF chunk.
+	fwrite("RIFF", 4, 1, fp);
+	WriteDWord(fp, 0);
+	fwrite("WAVE", 4, 1, fp);
+	
+
+	// Write the FORMAT chunk.
+	fwrite("fmt ", 4, 1, fp);
+	
+	WriteDWord(fp, 0x10);
+	WriteWord(fp, 1);	// WAVE_FORMAT_PCM
+	WriteWord(fp, (unsigned short)nChannels);	
+	WriteDWord(fp, (unsigned long)nSamplesPerSec);
+	WriteDWord(fp, (unsigned long)((wBitsPerSample / 8) * nChannels * nSamplesPerSec));
+	WriteWord(fp, (unsigned short)((wBitsPerSample / 8) * nChannels));
+	WriteWord(fp, (unsigned short)wBitsPerSample);
+
+	// Write the DATA chunk.
+	fwrite("data", 4, 1, fp);
+	WriteDWord(fp, (unsigned long)nBytes);
+	fwrite(pData, nBytes, 1, fp);
+
+
+	// Go back and write the length of the riff file.
+	unsigned long dwVal = ftell(fp) - 8;
+	fseek( fp, 4, SEEK_SET );
+	WriteDWord(fp, dwVal);
+
+	fclose(fp);
+	return true;
+}
+
+