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