tdelibs/arts/kde/kaudiorecordstream.cpp

    /*

    Copyright (C) 2001, 2002 Matthias Kretz
                            kretz@kde.org
                  2003       Arnold Krille
                             arnold@arnoldarts.de

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.
  
    This library 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
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public License
    along with this library; see the file COPYING.LIB.  If not, write to
    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
    Boston, MA 02110-1301, USA.

    */

#include "kaudiorecordstream.h"
#include "kaudiorecordstream_p.h"
#include "kartsserver.h"

#include <artsflow.h>
#include <soundserver.h>

#include <tdeglobal.h>
#include <kdebug.h>

#include <tqstring.h>
#include <tqptrqueue.h>
#include <tqcstring.h> //QByteArray

#include <assert.h>

struct KAudioRecordStream::Data
{
	Arts::Synth_AMAN_RECORD in;
	Arts::AudioToByteStream convert;
	Arts::StereoEffectStack effectStack;
	Arts::ByteSoundReceiver receiver;
	KByteSoundReceiver * receiver_base;
	KArtsServer * kserver;
	bool attached;
	bool blocking;
	bool polling;
	unsigned int pos;
	TQPtrQueue<TQByteArray> inqueue;
	TQString title;
};

KAudioRecordStream::KAudioRecordStream( KArtsServer * kserver, const TQString & title, TQObject * parent, const char * name )
	: TQObject( parent, name )
	, d( new Data )
{
	d->kserver = kserver;
	d->attached = false;
	d->blocking = true;
	d->polling = false;
	d->pos = 0;
	d->inqueue.setAutoDelete( true );
	d->title = title;

	connect( d->kserver, TQT_SIGNAL( restartedServer() ), TQT_SLOT( slotRestartedServer() ) );

	d->in = Arts::DynamicCast( d->kserver->server().createObject( "Arts::Synth_AMAN_RECORD" ) );
	d->effectStack = Arts::DynamicCast( d->kserver->server().createObject( "Arts::StereoEffectStack" ) );
	d->convert = Arts::DynamicCast( d->kserver->server().createObject( "Arts::AudioToByteStream" ) );
	if( d->in.isNull() )
		kdFatal( 400 ) << "couldn't create a Synth_AMAN_RECORD on the aRts server\n";
	if( d->effectStack.isNull() )
		kdFatal( 400 ) << "couldn't create a StereoEffectStack on the aRts server\n";
	if( d->convert.isNull() )
		kdFatal( 400 ) << "couldn't create a AudioToByteStream on the aRts server\n";

	d->in.title( ( const char * ) d->title.local8Bit() );
	Arts::connect( d->in, d->effectStack );
	d->in.start();
	d->effectStack.start();
}

KAudioRecordStream::~KAudioRecordStream()
{
	d->receiver = Arts::ByteSoundReceiver::null();
	// don't delete receiver_base because aRts takes care of that (in the line
	// above)
	d->receiver_base = 0;
	delete d;
}

int KAudioRecordStream::read( char * buffer, int size )
{
	kdDebug( 400 ) << k_funcinfo << endl;
	unsigned int remaining = size;
	while( remaining )
	{
		if( d->blocking )
			while( d->inqueue.isEmpty() )
				Arts::Dispatcher::the()->ioManager()->processOneEvent( true );
		else
		{
			if( d->inqueue.isEmpty() )
				Arts::Dispatcher::the()->ioManager()->processOneEvent( false );
			if( d->inqueue.isEmpty() )
				return size - remaining;
		}
		TQByteArray * data = d->inqueue.head();
		unsigned int tocopy = kMin( remaining, data->size() - d->pos );
		memcpy( buffer, data->data() + d->pos, tocopy );
		d->pos += tocopy;
		buffer += tocopy;
		remaining -= tocopy;
		if( d->pos == data->size() )
		{
			d->inqueue.remove();
			d->pos = 0;
		}
	}
	return size;
}

void KAudioRecordStream::setBlockingIO( bool blocking )
{
	d->blocking = blocking;
}

bool KAudioRecordStream::blockingIO() const
{
	return d->blocking;
}

void KAudioRecordStream::usePolling( bool polling )
{
	d->polling = polling;
	if( ! polling )
		flush();
}

bool KAudioRecordStream::polling() const
{
	return d->polling;
}

Arts::StereoEffectStack KAudioRecordStream::effectStack() const
{
	return d->effectStack;
}

bool KAudioRecordStream::running() const
{
	return d->attached;
}

void KAudioRecordStream::stop()
{
	kdDebug( 400 ) << k_funcinfo << endl;
	if( d->attached )
	{
		d->receiver.stop();
		d->convert.stop();

		Arts::disconnect( d->convert, d->receiver );
		d->receiver = Arts::ByteSoundReceiver::null();
		d->receiver_base = 0;

		Arts::disconnect( d->effectStack, d->convert );

		d->attached = false;
		emit running( false );
	}
}

void KAudioRecordStream::start( int samplingRate, int bits, int channels )
{
	kdDebug( 400 ) << k_funcinfo << "samplingRate: " << samplingRate << " bits: " << bits << " channels: " << channels << endl;
	if( ! d->attached )
	{
		assert( d->kserver );

		if( ( samplingRate < 500 || samplingRate > 2000000 )
				|| ( channels != 1 && channels != 2 ) || ( bits != 8 && bits != 16 ) )
		{
			kdWarning( 400 ) << "invalid stream parameters: rate=" << samplingRate << ", " << bits << " bit, " << channels << " channels\n";
		}
		else
		{
			d->convert.samplingRate( samplingRate );
			d->convert.channels( channels );
			d->convert.bits( bits );
			Arts::connect( d->effectStack, d->convert );

			d->receiver_base = new KByteSoundReceiver( samplingRate, bits, channels, d->title.local8Bit() );
			d->receiver = Arts::ByteSoundReceiver::_from_base( d->receiver_base );
			connect( d->receiver_base, TQT_SIGNAL( data( const char *, unsigned int ) ),
					TQT_SLOT( slotData( const char *, unsigned int ) ) );
			Arts::connect( d->convert, "outdata", d->receiver, "indata" );

			d->convert.start();
			d->receiver.start();

			//### needed?
			Arts::Dispatcher::the()->ioManager()->processOneEvent( false );
			d->attached = true;
			emit running( true );
		}
	}
}

void KAudioRecordStream::flush()
{
	kdDebug( 400 ) << k_funcinfo << endl;
	d->inqueue.clear();
}

void KAudioRecordStream::slotRestartedServer() { }

void KAudioRecordStream::slotData( const char * contents, unsigned int size )
{
	//kdDebug( 400 ) << k_funcinfo << endl;
	TQByteArray * bytearray = new TQByteArray( size );
	// copy the contents to the bytearray
	// this has to be deleted later
	bytearray->duplicate( contents, size );
	if( d->polling )
	{
		kdDebug( 400 ) << "enqueue the data\n";
		d->inqueue.enqueue( bytearray );
	}
	else
	{
		//kdDebug( 400 ) << "emit the data\n";
		emit data( *bytearray );
		//kdDebug( 400 ) << "delete the data\n";
		delete bytearray;
	}
}

////////////////////////////////////////
// ---*--- KByteSoundReceiver ---*--- //
////////////////////////////////////////

KByteSoundReceiver::KByteSoundReceiver( int rate, int bits, int channels, const char * title )
	: _samplingRate( rate )
	, _bits( bits )
	, _channels( channels )
	, _title( title )
{
}

KByteSoundReceiver::~KByteSoundReceiver()
{
}

void KByteSoundReceiver::process_indata( Arts::DataPacket<Arts::mcopbyte> * inpacket )
{
	//kdDebug( 400 ) << k_funcinfo << " size of the packet: " << inpacket->size << endl;
	emit data( (char *)inpacket->contents, inpacket->size );
	inpacket->processed();
}
#include "kaudiorecordstream.moc"
#include "kaudiorecordstream_p.moc"