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