non/nonlib/JACK/Port.C

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/*******************************************************************************/
/* Copyright (C) 2008 Jonathan Moore Liles */
/* */
/* 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; either version 2 of the License, or (at your */
/* option) any later version. */
/* */
/* This program 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 General Public License for */
/* more details. */
/* */
/* You should have received a copy of the GNU General Public License along */
/* with This program; see the file COPYING. If not,write to the Free Software */
/* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/*******************************************************************************/
/* Wrapper for a JACK audio port */
#include "Port.H"
#include <string.h>
#include <stdio.h> // sprintf
#include <errno.h>
namespace JACK
{
static const char *name_for_port ( Port::direction_e dir, const char *base, int n, const char *type );
int
Port::max_name ( void )
{
return jack_port_name_size() - jack_client_name_size() - 6;
}
Port::Port ( const Port &rhs )
{
_freezer = rhs._freezer;
_client = rhs._client;
_port = rhs._port;
_direction = rhs._direction;
_type = rhs._type;
_name = strdup( rhs._name );
_client->port_added( this );
}
/* nframes is the number of frames to buffer */
Port::Port ( JACK::Client *client, jack_port_t *port )
{
_freezer = NULL;
_client = client;
_port = port;
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_name = strdup( jack_port_name( port ) );
_direction = jack_port_flags( _port ) == JackPortIsOutput ? Output : Input;
const char *type = jack_port_type( _port );
_type = Audio;
if ( strstr( type, "MIDI") )
_type = MIDI;
}
Port::Port ( JACK::Client *client, const char *name, direction_e dir, type_e type )
{
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_name = NULL;
_freezer = NULL;
_client = client;
_direction = dir;
_type = type;
_name = strdup( name );
}
Port::Port ( JACK::Client *client, direction_e dir, type_e type, const char *base, int n, const char *subtype )
{
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_name = NULL;
_freezer = NULL;
_client = client;
_name = strdup( name_for_port( dir, base, n, subtype ) );
_direction = dir;
_type = type;
}
Port::Port ( JACK::Client *client, direction_e dir, type_e type, int n, const char *subtype )
{
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_name = NULL;
_freezer = NULL;
_client = client;
_name = strdup( name_for_port( dir, NULL, n, subtype ) );
_direction = dir;
_type = type;
}
Port::~Port ( )
{
if ( _name )
free( _name );
_client->port_removed( this );
/* if ( _freezer ) */
/* { */
/* delete _freezer; */
/* _freezer = NULL; */
/* } */
/* if ( _port ) */
/* jack_port_unregister( _client, _port ); */
}
/* sort input before output and then by alpha */
bool
Port::operator < ( const Port & rhs ) const
{
if ( type() == rhs.type() )
return strcmp( name(), rhs.name() );
else
return type() == Port::Input;
}
static const char *
name_for_port ( Port::direction_e dir, const char *base, int n, const char *type )
{
static char pname[ 512 ];
const char *dir_s = dir == Port::Output ? "out" : "in";
pname[0] = '\0';
if ( base )
{
strncpy( pname, base, Port::max_name() );
strcat( pname, "/" );
}
pname[ Port::max_name() - 1 ] = '\0';
int l = strlen( pname );
if ( type )
snprintf( pname + l, sizeof( pname ) - l, "%s-%s-%d", type, dir_s, n + 1 );
else
snprintf( pname + l, sizeof( pname ) - l, "%s-%d", dir_s, n + 1 );
return pname;
}
bool
Port::activate ( const char *name, direction_e dir )
{
_name = strdup( name );
_direction = dir;
return activate();
}
bool
Port::activate ( void )
{
_port = jack_port_register( _client->jack_client(), _name,
_type == Audio ? JACK_DEFAULT_AUDIO_TYPE : JACK_DEFAULT_MIDI_TYPE,
_direction == Output ? JackPortIsOutput : JackPortIsInput,
0 );
if ( ! _port )
return false;
_client->port_added( this );
return true;
}
/** returns the sum of latency of all ports between this one and a
terminal port. */
/* FIMXE: how does JACK know that input A of client Foo connects to
output Z of the same client in order to draw the line through Z to a
terminal port? And, if this determination cannot be made, what use is
this function? */
nframes_t
Port::total_latency ( void ) const
{
return jack_port_get_total_latency( _client->jack_client() , _port );
}
/** returns the number of frames of latency assigned to this port */
nframes_t
Port::latency ( void ) const
{
return jack_port_get_latency( _port );
}
/** inform JACK that port has /frames/ frames of latency */
void
Port::latency ( nframes_t frames )
{
jack_port_set_latency( _port, frames );
}
void
Port::shutdown ( void )
{
if ( _port )
jack_port_unregister( _client->jack_client(), _port );
_client->port_removed( this );
}
/** rename port */
bool
Port::name ( const char *name )
{
_name = strdup( name );
return 0 == jack_port_set_name( _port, name );
}
bool
Port::name ( const char *base, int n, const char *type )
{
return name( name_for_port( this->direction(), base, n, type ) );
}
void
Port::write ( sample_t *buf, nframes_t nframes )
{
memcpy( buffer( nframes ), buf, nframes * sizeof( sample_t ) );
}
void
Port::read ( sample_t *buf, nframes_t nframes )
{
memcpy( buf, buffer( nframes ), nframes * sizeof( sample_t ) );
}
void *
Port::buffer ( nframes_t nframes )
{
return jack_port_get_buffer( _port, nframes );
}
void
Port::silence ( nframes_t nframes )
{
memset( buffer( nframes ), 0, nframes * sizeof( sample_t ) );
}
/** Return a malloc()'d null terminated array of strings
* representing all ports to which this port is connected. */
const char **
Port::connections ( void )
{
return jack_port_get_connections( _port );
}
/** Restore the connections returned by connections() */
bool
Port::connections ( const char **port_names )
{
if ( ! port_names )
return true;
for ( const char **port_name = port_names; *port_name; ++port_name )
{
const char *src;
const char *dst;
const char *name = jack_port_name( _port );
if ( type() == Output )
{
src = name;
dst = *port_name;
}
else
{
src = *port_name;
dst = name;
}
if ( int err = jack_connect( _client->jack_client(), src, dst ) )
{
if ( EEXIST == err )
{
/* connection already exists, not a problem */
}
else
{
return false;
}
}
}
return true;
}
int
Port::connect ( const char *to )
{
const char *name = jack_port_name( _port );
if ( _direction == Output )
{
return jack_connect( _client->jack_client(), name, to );
}
else
{
return jack_connect( _client->jack_client(), to, name );
}
}
int
Port::disconnect ( const char *from )
{
const char *name = jack_port_name( _port );
if ( _direction == Output )
{
return jack_disconnect( _client->jack_client(), name, from );
}
else
{
return jack_disconnect( _client->jack_client(), from, name );
}
}
bool
Port::connected_to ( const char *to )
{
return jack_port_connected_to( _port, to );
}
void
Port::freeze ( void )
{
if ( _freezer )
delete _freezer;
freeze_state *f = new freeze_state();
f->connections = connections();
f->name = strdup( name() );
_freezer = f;
}
void
Port::thaw ( void )
{
activate();
connections( _freezer->connections );
delete _freezer;
_freezer = NULL;
}
}