?? wav.cpp
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/*____________________________________________________________________________
FreeAmp - The Free MP3 Player
Copyright (C) 2000 Michael Rich
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
$Id: wav.cpp,v 1.3 2000/03/17 04:22:41 robert Exp $
____________________________________________________________________________*/
/* system headers */
#ifdef WIN32
#include <windows.h>
#endif
#include <stdio.h>
#include <string.h>
#include "wav.h"
WaveWriter::WaveWriter()
{
m_FP = NULL;
}
WaveWriter::~WaveWriter()
{
if (m_FP != NULL)
Close();
}
DWORD WaveWriter::StuffFourChars(char one, char two, char three, char four)
{
char dest[4];
DWORD *ptr;
ptr = (DWORD *)dest;
dest[0] = one;
dest[1] = two;
dest[2] = three;
dest[3] = four;
return *ptr;
}
int WaveWriter::Create(const char *FileName, WAVEFORMATEX *waveformat)
{
m_FP = fopen(FileName, "wb");
memset(&m_WH, 0, sizeof(m_WH));
m_WH.MainChunkID = StuffFourChars('R', 'I', 'F', 'F');
m_WH.Length = 0; // temp, to be filled in as we go
m_WH.ChunkTypeID = StuffFourChars('W', 'A', 'V', 'E');
m_WH.SubChunkID = StuffFourChars('f', 'm', 't', ' ');
m_WH.SubChunkLength = 16;
m_WH.Format = waveformat->wFormatTag;
m_WH.Modus = waveformat->nChannels;
m_WH.SampleFreq = waveformat->nSamplesPerSec;
m_WH.BytesPerSec = waveformat->nAvgBytesPerSec;
m_WH.BytesPerSample = waveformat->nBlockAlign;
m_WH.BitsPerSample = waveformat->wBitsPerSample;
m_WH.DataChunkID = StuffFourChars('d', 'a', 't', 'a');
m_WH.DataLength = 0; // temp, to be filled in as we go
fwrite(&m_WH, sizeof(m_WH), 1, m_FP);
return 0;
}
void WaveWriter::Close()
{
if (m_FP == NULL) return;
m_WH.Length = m_WH.DataLength + sizeof(WaveHeader) - 4;
fseek(m_FP, 0, SEEK_SET);
fwrite(&m_WH, sizeof(m_WH), 1, m_FP);
fclose(m_FP);
m_FP = NULL;
}
DWORD WaveWriter::Write(const char *data, DWORD data_size)
{
m_WH.DataLength+=data_size;
return fwrite(data, data_size, 1, m_FP);
}
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