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/***************************************************************************
copyright : (C) 2003 by Arnold Krille
email : arnold@arnoldarts.de
***************************************************************************/
/***************************************************************************
* *
* 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; version 2 of the License. *
* *
***************************************************************************/
#include "krecexport_wave.h"
#include "krecexport_wave.moc"
#include "krecglobal.h"
#include <kdebug.h>
#include <ktempfile.h>
#include <qfile.h>
#include <qtimer.h>
#include <kgenericfactory.h>
K_EXPORT_COMPONENT_FACTORY( libkrecexport_wave, KGenericFactory<KRecExport_Wave> )
KRecExport_Wave krecExportWave( 0 );
KRecExport_Wave::KRecExport_Wave( QObject* p, const char* n, const QStringList& )
: KRecExportItem( p,n )
, _file( 0 )
{
kdDebug( 60005 ) << k_funcinfo << endl;
registerAtGlobal( this );
kdDebug( 60005 ) << "Registered Exports: " << KRecGlobal::the()->exportFormats() << endl;
}
KRecExport_Wave::~KRecExport_Wave() {
kdDebug( 60005 ) << k_funcinfo << endl;
}
KRecExport_Wave* KRecExport_Wave::newItem() {
kdDebug( 60005 ) << k_funcinfo << endl;
return new KRecExport_Wave( 0 );
}
QStringList KRecExport_Wave::extensions() {
//kdDebug( 60005 ) << k_funcinfo << endl;
QStringList tmp;
tmp << "*.wav" << "*.WAV";
return tmp;
}
bool KRecExport_Wave::initialize( const QString &filename ) {
kdDebug( 60005 ) << k_funcinfo << endl;
if ( !_file ) {
_file = new QFile( filename );
if ( _file->open( IO_Raw|IO_WriteOnly ) ) {
/// Write an empty Wave-header...
for ( int i=0; i<44; i++ )
_file->putch( 0 );
} else return false;
return true;
} else return false;
}
bool KRecExport_Wave::process() {
//kdDebug( 60005 ) << k_funcinfo << running << endl;
if ( _file ) {
if ( running() ) {
QByteArray bytearray( 4096 );
emit getData( bytearray );
_file->writeBlock( bytearray );
QTimer::singleShot( 10, this, SLOT( process() ) );
}
return true;
} else return false;
}
bool KRecExport_Wave::finalize() {
kdDebug( 60005 ) << k_funcinfo << endl;
if ( _file ) {
// PCM-Compatible WAVE Header
// bytes variable description
// 0 - 3 'RIFF'
// 4 - 7 wRiffLength length of file minus the 8 byte riff header
// 8 - 11 'WAVE'
// 12 - 15 'fmt '
// 16 - 19 wFmtSize length of format chunk minus 8 byte header
// 20 - 21 wFormatTag identifies PCM, ULAW etc
// 22 - 23 wChannels number of channels
// 24 - 27 dwSamplesPerSecond samples per second per channel
// 28 - 31 dwAvgBytesPerSec non-trivial for compressed formats
// 32 - 33 wBlockAlign basic block size
// 34 - 35 wBitsPerSample non-trivial for compressed formats
// 36 - 39 'data'
// 40 - 43 dwDataLength length of data chunk minus 8 byte header
// 44 - (dwDataLength + 43) the data
// Basic 16b,2c,44kHz Wave-Header
char riffHeader[] =
{
0x52, 0x49, 0x46, 0x46, // 0 "AIFF"
0x00, 0x00, 0x00, 0x00, // 4 wavSize
0x57, 0x41, 0x56, 0x45, // 8 "WAVE"
0x66, 0x6d, 0x74, 0x20, // 12 "fmt "
0x10, 0x00, 0x00, 0x00, // 16
0x01, 0x00, 0x02, 0x00, // 20
0x44, 0xac, 0x00, 0x00, // 24
0x10, 0xb1, 0x02, 0x00, // 28
0x04, 0x00, 0x10, 0x00, // 32
0x64, 0x61, 0x74, 0x61, // 36 "data"
0x00, 0x00, 0x00, 0x00 // 40 byteCount
};
long wavSize = _file->size() - 8;
write32( riffHeader, wavSize, 4 );
write16( riffHeader, channels(), 22 );
write32( riffHeader, samplingRate(), 24 );
write16( riffHeader, bits(), 34 );
long byteCount = wavSize - 44;
write32( riffHeader, byteCount, 40 );
_file->at( 0 );
_file->writeBlock( riffHeader, 44 );
_file->at( _file->size() );
_file->close();
delete _file;
_file = 0;
return true;
} else return false;
}
// vim:sw=4:ts=4
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