# arts Library API Documentation

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# kaudioplaystream.cpp

    00001 /*  This file is part of the KDE project
    00002     Copyright (C) 2003 Arnold Krille <arnold@arnoldarts.de>
    00003
    00004     This library is free software; you can redistribute it and/or
    00005     modify it under the terms of the GNU Library General Public
    00006     License version 2 as published by the Free Software Foundation.
    00007
    00008     This library is distributed in the hope that it will be useful,
    00009     but WITHOUT ANY WARRANTY; without even the implied warranty of
    00010     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    00011     Library General Public License for more details.
    00012
    00013     You should have received a copy of the GNU Library General Public License
    00014     along with this library; see the file COPYING.LIB.  If not, write to
    00015     the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    00016     Boston, MA 02111-1307, USA.
    00017
    00018 */
    00019
    00020 #include "kaudioplaystream.h"
    00021 #include "kaudioplaystream_p.h"
    00022
    00023 #include <kartsserver.h>
    00024 #include <kaudiomanagerplay.h>
    00025
    00026 #include <artsflow.h>
    00027 #include <soundserver.h>
    00028
    00029 #include <kglobal.h>
    00030 #include <kdebug.h>
    00031
    00032 #include <qstring.h>
    00033 //#include <qptrqueue.h>
    00034 //#include <qcstring.h> //QByteArray
    00035
    00036 #include <string.h> // for strncpy
    00037
    00038 //#include <assert.h>
    00039
    00040 KAudioPlayStreamPrivate::KAudioPlayStreamPrivate( KArtsServer* server, const QString title, QObject* p, const char* n )
    00041  : QObject( p,n )
    00042  , _server( server )
    00043  , _play( new KAudioManagerPlay( _server, title ) )
    00044  , _effectrack( Arts::StereoEffectStack::null() )
    00045  , _polling( true ), _attached( false ), _effects( true )
    00046 {
    00047 kdDebug( 400 ) << k_funcinfo << endl;
    00048     initaRts();
    00049 }
    00050
    00051 KAudioPlayStreamPrivate::~KAudioPlayStreamPrivate()
    00052 {
    00053     kdDebug( 400 ) << k_funcinfo << endl;
    00054     _play->stop();
    00055     if ( _effects ) _effectrack.stop();
    00056     _bs2a.stop();
    00057 }
    00058
    00059 void KAudioPlayStreamPrivate::initaRts() {
    00060     kdDebug( 400 ) << k_funcinfo << endl;
    00061
    00062     _effectrack = Arts::DynamicCast( _server->server().createObject( "Arts::StereoEffectStack" ) );
    00063     if ( _effectrack.isNull() )
    00064     {
    00065         kdWarning( 400 ) << "Couldn't create EffectStack!" << endl;
    00066         _effects = false;
    00067     }
    00068
    00069     _bs2a = Arts::DynamicCast( _server->server().createObject( "Arts::ByteStreamToAudio" ) );
    00070     if ( _bs2a.isNull() )
    00071         kdFatal( 400 ) << "Couldn't create ByteStreamToAudio" << endl;
    00072
    00073     if ( _effects )
    00074     {
    00075         Arts::connect( _effectrack, _play->amanPlay() );
    00076         Arts::connect( _bs2a, _effectrack );
    00077     } else {
    00078         Arts::connect( _bs2a, _play->amanPlay() );
    00079     }
    00080
    00081     _play->start();
    00082     if ( _effects ) _effectrack.start();
    00083 }
    00084
    00085 KAudioPlayStream::KAudioPlayStream( KArtsServer* server, const QString title, QObject* p, const char* n )
    00086  : QObject( p,n )
    00087  , d( new KAudioPlayStreamPrivate( server, title, this ) )
    00088 {
    00089     kdDebug( 400 ) << k_funcinfo << endl;
    00090 }
    00091 KAudioPlayStream::~KAudioPlayStream()
    00092 {
    00093     kdDebug( 400 ) << k_funcinfo << endl;
    00094 }
    00095
    00096 void KAudioPlayStream::setPolling( bool n ) { d->_polling = n; }
    00097 bool KAudioPlayStream::polling() const { return d->_polling; }
    00098
    00099 bool KAudioPlayStream::running() const { return d->_attached; }
    00100
    00101 Arts::StereoEffectStack KAudioPlayStream::effectStack() const {
    00102     return d->_effectrack;
    00103 }
    00104
    00105 void KAudioPlayStream::start( int samplingRate, int bits, int channels )
    00106 {
    00107     kdDebug( 400 ) << k_funcinfo << "samplingRate: " << samplingRate << " bits: " << bits << " channels: " << channels << endl;
    00108     if ( !d->_attached )
    00109     {
    00110         d->_bs2a.samplingRate( samplingRate );
    00111         d->_bs2a.channels( channels );
    00112         d->_bs2a.bits( bits );
    00113
    00114         d->_sender = new KByteSoundProducer( this, d->_server->server().minStreamBufferTime(), samplingRate, bits, channels, "PS" );
    00115         d->_artssender = Arts::ByteSoundProducerV2::_from_base( d->_sender );
    00116         Arts::connect( d->_artssender, "outdata", d->_bs2a, "indata" );
    00117
    00118         d->_bs2a.start();
    00119         d->_artssender.start();
    00120
    00121 //      // Needed?
    00122         Arts::Dispatcher::the()->ioManager()->processOneEvent( false );
    00123
    00124         d->_attached = true;
    00125         emit running( d->_attached );
    00126     }
    00127 }
    00128 void KAudioPlayStream::stop()
    00129 {
    00130     kdDebug( 400 ) << k_funcinfo << endl;
    00131     if ( d->_attached )
    00132     {
    00133         d->_attached = false;
    00134
    00135         d->_bs2a.stop();
    00136         d->_artssender.stop();
    00137
    00138         // Shortly stop the play so we dont get clicks and artefacts
    00139         d->_play->stop();
    00140         d->_play->start();
    00141
    00142         Arts::disconnect( d->_artssender, d->_bs2a );
    00143         d->_artssender = Arts::ByteSoundProducerV2::null();
    00144         d->_sender = 0;
    00145
    00146         emit running( d->_attached );
    00147     }
    00148 }
    00149
    00150 void KAudioPlayStream::write( QByteArray& )
    00151 {
    00152 }
    00153
    00154 void KAudioPlayStream::fillData( Arts::DataPacket<Arts::mcopbyte> *packet )
    00155 {
    00156     //kdDebug( 400 ) << k_funcinfo << "packet->size=" << packet->size << endl;
    00157     if ( d->_polling )
    00158     {
    00159         QByteArray bytearray( packet->size );
    00160         bytearray.setRawData( ( char* )packet->contents, packet->size );
    00161         bytearray.fill( 0 );
    00162         emit requestData( bytearray );
    00163         bytearray.resetRawData( ( char* )packet->contents, packet->size );
    00164
    00165         //for ( int i=0; i<10; i++ )
    00166         //  kdDebug() << packet->contents[ i ] << " : " << bytearray.data()[ i ] << endl;
    00167     } else {
    00169     }
    00170 }
    00171
    00172 // * * * KByteSoundProducer * * *
    00173
    00174 KByteSoundProducer::KByteSoundProducer( KAudioPlayStream* impl, float minBufferTime, int rate, int bits, int channels, const char * title )
    00175  : _samplingRate( rate )
    00176  , _channels( channels )
    00177  , _bits( bits )
    00178  , _packets( 7 )
    00179  , _title( title )
    00180  , _impl( impl )
    00181 {
    00182     // Calculate packet count (packetsize is fixed to packetCapacity = 4096
    00183     float streamBufferTime;
    00184     do {
    00185         _packets++;
    00186         streamBufferTime = ( float )( _packets * packetCapacity * 1000 )
    00187             / ( float )( _samplingRate * _channels * 2 );
    00188     } while ( streamBufferTime < minBufferTime );
    00189     //kdDebug( 400 ) << k_funcinfo << "_packets:" << _packets << " packetCapacity:" << packetCapacity << endl;
    00190 }
    00191
    00192 KByteSoundProducer::~KByteSoundProducer()
    00193 {
    00194 }
    00195
    00196 void KByteSoundProducer::streamStart() { outdata.setPull( _packets, packetCapacity ); }
    00197 void KByteSoundProducer::streamEnd() { outdata.endPull(); }
    00198
    00199 void KByteSoundProducer::request_outdata( Arts::DataPacket<Arts::mcopbyte> *packet )
    00200 {
    00201     if ( _impl->running() ) {
    00202         _impl->fillData( packet );
    00203         packet->send();
    00204     }
    00205 }
    00206
    00207 // vim: sw=4 ts=4 tw=80
    00208
    00209 #include "kaudioplaystream.moc"
    00210 #include "kaudioplaystream_p.moc"

This file is part of the documentation for arts Library Version 3.4.1.
Documentation copyright © 1996-2004 the KDE developers.
Generated on Sat Jun 11 20:27:55 2005 by doxygen 1.4.1 written by Dimitri van Heesch, © 1997-2003