diff options
Diffstat (limited to 'krec/krecexport_wave.cpp')
| -rw-r--r-- | krec/krecexport_wave.cpp | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/krec/krecexport_wave.cpp b/krec/krecexport_wave.cpp new file mode 100644 index 00000000..80ea63d7 --- /dev/null +++ b/krec/krecexport_wave.cpp @@ -0,0 +1,135 @@ +/*************************************************************************** + 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 |