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347 lines
8.6 KiB
347 lines
8.6 KiB
/*
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Copyright (C) 2004 Matthias Kretz <kretz@kde.org>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License version 2 as published by the Free Software Foundation.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#ifdef HAVE_LIBJACK
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#include <jack/jack.h>
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#include <jack/ringbuffer.h>
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#include "debug.h"
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#include "audioio.h"
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#include "audiosubsys.h"
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#include "iomanager.h"
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#include "dispatcher.h"
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#ifndef MIN
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#define MIN(a,b) ((a) < (b) ? (a) : (b))
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#endif
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#undef DEBUG_WAVEFORM
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#ifdef DEBUG_WAVEFORM
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#include <fstream>
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#endif
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#include <cstdlib>
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#include <cstring>
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namespace Arts {
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class AudioIOJack : public AudioIO, public TimeNotify {
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private:
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#ifdef DEBUG_WAVEFORM
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std::ofstream plotfile;
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#endif
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char * processBuffer;
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size_t buffersize;
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protected:
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jack_client_t *jack;
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jack_port_t *outleft, *outright;
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jack_port_t *inleft, *inright;
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jack_ringbuffer_t *olb, *orb, *ilb, *irb;
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public:
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AudioIOJack();
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void notifyTime();
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void setParam( AudioParam p, int & val );
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int getParam(AudioParam param);
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static int jackCallback( jack_nframes_t, void * );
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bool open();
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void close();
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int read(void *buffer, int size);
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int write(void *buffer, int size);
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};
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REGISTER_AUDIO_IO(AudioIOJack,"jack","Jack Audio Connection Kit");
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}
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using namespace std;
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using namespace Arts;
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AudioIOJack::AudioIOJack()
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:
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#ifdef DEBUG_WAVEFORM
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plotfile( "/dev/shm/audioiojack.plot" ),
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#endif
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jack( 0 )
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, outleft( 0 )
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, outright( 0 )
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, inleft( 0 )
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, inright( 0 )
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{
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/*
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* default parameters
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*/
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param( samplingRate ) = 44100;
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paramStr( deviceName ) = "jack";
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param( fragmentSize ) = 512;
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param( fragmentCount ) = 2;
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param( channels ) = 2;
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param( direction ) = 2;
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param( format ) = 32;
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}
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bool AudioIOJack::open()
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{
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string& _error = paramStr( lastError );
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jack = jack_client_new( "artsd" );
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if( jack == 0 )
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{
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_error = "Couldn't connect to jackd";
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return false;
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}
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int& _sampleRate = param(samplingRate);
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_sampleRate = jack_get_sample_rate( jack );
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int& _fragmentSize = param(fragmentSize);
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int& _fragmentCount = param(fragmentCount);
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/*
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* don't allow unreasonable large fragmentSize/Count combinations,
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* because "real" hardware also doesn't
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*/
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if(_fragmentSize > 1024*8) _fragmentSize = 1024*8;
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while(_fragmentSize * _fragmentCount > 1024*128)
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_fragmentCount--;
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jack_set_process_callback( jack, Arts::AudioIOJack::jackCallback, this );
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if( param( direction ) & directionWrite )
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{
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outleft = jack_port_register( jack, "out_1",
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JACK_DEFAULT_AUDIO_TYPE, JackPortIsOutput, 0 );
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outright = jack_port_register( jack, "out_2",
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JACK_DEFAULT_AUDIO_TYPE, JackPortIsOutput, 0 );
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olb = jack_ringbuffer_create(
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sizeof( jack_default_audio_sample_t ) *
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_fragmentSize * _fragmentCount );
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orb = jack_ringbuffer_create(
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sizeof( jack_default_audio_sample_t ) *
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_fragmentSize * _fragmentCount );
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}
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if( param( direction ) & directionRead )
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{
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inleft = jack_port_register( jack, "in_1",
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JACK_DEFAULT_AUDIO_TYPE, JackPortIsInput, 0 );
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inright = jack_port_register( jack, "in_2",
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JACK_DEFAULT_AUDIO_TYPE, JackPortIsInput, 0 );
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ilb = jack_ringbuffer_create(
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sizeof( jack_default_audio_sample_t ) *
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1024 * 64 );
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irb = jack_ringbuffer_create(
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sizeof( jack_default_audio_sample_t ) *
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1024 * 64 );
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}
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if( jack_activate( jack ) )
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{
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_error = "Activating as jack client failed.";
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return false;
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}
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const char **ports;
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if( param( direction ) & directionRead )
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{
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ports = jack_get_ports( jack, 0, 0, JackPortIsPhysical
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| JackPortIsOutput );
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if( ports == 0 )
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{
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arts_warning( "Cannot find any capture ports to"
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" connect to. You need to manually connect"
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" the capture ports in jack" );
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}
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else
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{
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if( ports[ 0 ] != 0 )
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jack_connect( jack, ports[ 0 ],
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jack_port_name( inleft ) );
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if( ports[ 1 ] != 0 )
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jack_connect( jack, ports[ 1 ],
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jack_port_name( inright ) );
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free( ports );
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}
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}
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if( param( direction ) & directionWrite )
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{
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ports = jack_get_ports( jack, 0, 0, JackPortIsPhysical
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| JackPortIsInput );
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if( ports == 0 )
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{
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arts_warning( "Cannot find any playback ports to"
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" connect to. You need to manually connect"
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" the playback ports in jack" );
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}
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else
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{
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if( ports[ 0 ] != 0 )
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jack_connect( jack, jack_port_name( outleft ),
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ports[ 0 ] );
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if( ports[ 1 ] != 0 )
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jack_connect( jack, jack_port_name( outright ),
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ports[ 1 ] );
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free( ports );
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}
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}
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// Install the timer
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Dispatcher::the()->ioManager()->addTimer(10, this);
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return true;
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}
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void AudioIOJack::close()
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{
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jack_client_close( jack );
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Dispatcher::the()->ioManager()->removeTimer(this);
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}
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int AudioIOJack::jackCallback( jack_nframes_t nframes, void * args )
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{
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AudioIOJack * that = static_cast<AudioIOJack*>( args );
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that->buffersize = nframes * sizeof( jack_default_audio_sample_t );
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if( that->outleft )
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{
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if( jack_ringbuffer_read_space( that->olb ) < that->buffersize )
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{
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that->processBuffer = static_cast<char *>(
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jack_port_get_buffer( that->outleft, nframes ) );
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memset( that->processBuffer, 0, that->buffersize );
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that->processBuffer = static_cast<char *>(
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jack_port_get_buffer( that->outright, nframes ) );
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memset( that->processBuffer, 0, that->buffersize );
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}
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else
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{
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that->processBuffer = static_cast<char *>(
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jack_port_get_buffer( that->outleft, nframes ) );
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jack_ringbuffer_read( that->olb, that->processBuffer, that->buffersize );
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that->processBuffer = static_cast<char *>(
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jack_port_get_buffer( that->outright, nframes ) );
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jack_ringbuffer_read( that->orb, that->processBuffer, that->buffersize );
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}
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}
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if( that->inleft )
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{
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that->processBuffer = static_cast<char *>(
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jack_port_get_buffer( that->inleft, nframes ) );
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jack_ringbuffer_write( that->ilb, that->processBuffer, that->buffersize );
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that->processBuffer = static_cast<char *>(
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jack_port_get_buffer( that->inright, nframes ) );
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jack_ringbuffer_write( that->irb, that->processBuffer, that->buffersize );
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}
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return 0;
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}
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void AudioIOJack::setParam( AudioParam p, int& val )
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{
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// don't change the format - jack only supports 32 bit float
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if( p == format )
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return;
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AudioIO::setParam( p, val );
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}
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int AudioIOJack::getParam(AudioParam p)
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{
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switch(p)
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{
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case canRead:
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return MIN( jack_ringbuffer_read_space( ilb ), jack_ringbuffer_read_space( irb ) ) * param( channels );
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case canWrite:
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return MIN( jack_ringbuffer_write_space( olb ), jack_ringbuffer_write_space( orb ) ) * param( channels );
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default:
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return AudioIO::getParam( p );
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}
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}
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int AudioIOJack::read(void *buffer, int size)
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{
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float * floatbuffer = static_cast<float *>( buffer );
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if( param( channels ) == 2 )
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{
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float * end = ( float * )( static_cast<char *>( buffer ) + size );
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while( floatbuffer < end )
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{
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jack_ringbuffer_read( ilb, ( char* )( floatbuffer++ ), sizeof( float ) );
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#ifdef DEBUG_WAVEFORM
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plotfile << *( floatbuffer - 1 ) << "\n";
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#endif
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jack_ringbuffer_read( irb, ( char* )( floatbuffer++ ), sizeof( float ) );
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}
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}
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else if( param( channels ) == 1 )
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{
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jack_ringbuffer_read( ilb, ( char* )( floatbuffer ), size );
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}
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return size;
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}
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int AudioIOJack::write(void *buffer, int size)
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{
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float * floatbuffer = static_cast<float *>( buffer );
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if( param( channels ) == 2 )
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{
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float * end = ( float * )( static_cast<char *>( buffer ) + size );
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while( floatbuffer < end )
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{
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jack_ringbuffer_write( olb, ( char* )( floatbuffer++ ), sizeof( float ) );
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jack_ringbuffer_write( orb, ( char* )( floatbuffer++ ), sizeof( float ) );
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}
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}
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else if( param( channels ) == 1 )
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{
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jack_ringbuffer_write( olb, ( char* )( floatbuffer ), size );
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}
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return size;
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}
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void AudioIOJack::notifyTime()
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{
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int& _direction = param(direction);
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int& _fragmentSize = param(fragmentSize);
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for( ;; )
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{
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int todo = 0;
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if( ( _direction & directionRead ) && ( getParam( canRead ) >= _fragmentSize ) )
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todo |= AudioSubSystem::ioRead;
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if( ( _direction & directionWrite ) && ( getParam( canWrite ) >= _fragmentSize ) )
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todo |= AudioSubSystem::ioWrite;
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if( ! todo )
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return;
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AudioSubSystem::the()->handleIO( todo );
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}
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}
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#endif
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// vim: sw=4 ts=4
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