Add hack to support 'renaming' of JACK::Client.

We wouldn't need this if JACK had jack_client_set_name().

Mixer/Chain.C

@@ -77,6 +77,8 @@
 
 #include <FL/Fl_Flip_Button.H>
 
+#include "const.h"
+
 
 
 std::list <Chain*> Chain::chain;
@@ -437,8 +439,17 @@ Chain::can_support_input_channels ( int n )
 void
 Chain::name ( const char *name )
 {
+
+    char ename[512];
+    snprintf( ename, sizeof(ename), "%s/%s", APP_NAME, name );
+
+    _name = engine()->name( ename );
+
+    /* FIXME: discarding the name jack picked is technically wrong! */
+
     _name = name;
 
+
     for ( int i = 0; i < modules(); ++i )
         module( i )->handle_chain_name_changed();
 }

Mixer/Controller_Module.C

@@ -166,10 +166,10 @@ Controller_Module::connect_to ( Port *p )
     {
         chain()->engine()->lock();
 
-        char name[256];
-        snprintf( name, sizeof( name ), "%s-CV", p->name() );
+//        char name[256];
+//        snprintf( name, sizeof( name ), "%s-CV", p->name() );
 
-        JACK::Port po( chain()->engine()->client(), JACK::Port::Input, chain()->name(), 0, name );
+        JACK::Port po( chain()->engine(), JACK::Port::Input, p->name(), 0, "CV" );
 
         if ( po.valid() )
         {

Mixer/JACK_Module.C

@@ -86,7 +86,7 @@ JACK_Module::configure_inputs ( int n )
     {
         for ( int i = on; i < n; ++i )
         {
-            JACK::Port po( chain()->engine()->client(), JACK::Port::Output, chain()->name(), i );
+            JACK::Port po( chain()->engine(), JACK::Port::Output, i );
 
             if ( po.valid() )
             {
@@ -120,7 +120,7 @@ JACK_Module::configure_outputs ( int n )
     {
         for ( int i = on; i < n; ++i )
         {
-            JACK::Port po( chain()->engine()->client(), JACK::Port::Input, chain()->name(), i );
+            JACK::Port po( chain()->engine(), JACK::Port::Input, i );
 
             if ( po.valid() )
             {
@@ -188,10 +188,10 @@ void
 JACK_Module::handle_chain_name_changed ( void )
 {
     for ( unsigned int i = 0; i < jack_output.size(); ++i )
-        jack_output[ i ].name( chain()->name(), i  );
+        jack_output[ i ].name( NULL, i  );
 
     for ( unsigned int i = 0; i < jack_input.size(); ++i )
-        jack_input[ i ].name( chain()->name(), i );
+        jack_input[ i ].name( NULL, i );
 }
 
 

Mixer/const.h

@@ -17,6 +17,8 @@
 /* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
 /*******************************************************************************/
 
+#pragma once
+
 #define APP_NAME "Non-Mixer"
 #define APP_TITLE "The Non-Mixer"
 #define __MODULE__ "non-mixer"

Timeline/Control_Sequence.C

@@ -41,7 +41,7 @@ Control_Sequence::Control_Sequence ( Track *track ) : Sequence( 0 )
 
     _track = track;
 
-    _output = new JACK::Port( engine->client(), JACK::Port::Output, track->name(), track->ncontrols(), "cv" );
+    _output = new JACK::Port( engine, JACK::Port::Output, track->name(), track->ncontrols(), "cv" );
 
     if ( track )
         track->add( this );
@@ -110,7 +110,7 @@ Control_Sequence::set ( Log_Entry &e )
 
             assert( t );
 
-            _output = new JACK::Port( engine->client(), JACK::Port::Output, t->name(), t->ncontrols(), "cv" );
+            _output = new JACK::Port( engine, JACK::Port::Output, t->name(), t->ncontrols(), "cv" );
 
             t->add( this );
         }

Timeline/Engine/Track.C

@@ -77,7 +77,7 @@ Track::configure_outputs ( int n )
     {
         for ( int i = on; i < n; ++i )
         {
-            JACK::Port p( engine->client(), JACK::Port::Output, name(), i );
+            JACK::Port p( engine, JACK::Port::Output, name(), i );
 
             if ( p.valid() )
                 output.push_back( p );
@@ -124,7 +124,7 @@ Track::configure_inputs ( int n )
     {
         for ( int i = on; i < n; ++i )
         {
-            JACK::Port p( engine->client(), JACK::Port::Input, name(), i );
+            JACK::Port p( engine, JACK::Port::Input, name(), i );
 
             if ( p.valid() )
                 input.push_back( p );

Timeline/Transport.C

@@ -25,7 +25,7 @@
 
 // Transport transport;
 
-#define client engine->client()
+#define client engine->jack_client()
 
 
 

nonlib/JACK/Client.C

@@ -18,6 +18,9 @@
 /*******************************************************************************/
 
 #include "Client.H"
+#include "Port.H"
+
+#include <algorithm>
 
 
 
@@ -146,4 +149,66 @@ namespace JACK
 //            WARNING( "Unkown error while setting freewheeling mode" );
     }
 
+
+    void
+    Client::port_added ( Port *p )
+    {
+        std::list < JACK::Port * >::iterator i = std::find( _active_ports.begin(), _active_ports.end(), p );
+
+        if ( i != _active_ports.end() )
+            return;
+
+        _active_ports.push_back( p );
+    }
+
+    void
+    Client::port_removed ( Port *p )
+    {
+        _active_ports.remove( p );
+    }
+
+
+    void
+    Client::freeze_ports ( void )
+    {
+        for ( std::list < JACK::Port * >::iterator i = _active_ports.begin();
+              i != _active_ports.end();
+              ++i )
+        {
+            (*i)->freeze();
+        }
+    }
+
+    void
+    Client::thaw_ports ( void )
+    {
+        for ( std::list < JACK::Port * >::iterator i = _active_ports.begin();
+              i != _active_ports.end();
+              ++i )
+        {
+            (*i)->thaw();
+        }
+    }
+
+    const char *
+    Client::name ( const char *s )
+    {
+        /* Because the JACK API does not provide a mechanism for renaming
+         * clients, we have to save connections, destroy our client,
+         * create a client with the new name, and restore our
+         * connections. Lovely. */
+
+        freeze_ports();
+
+        jack_deactivate( _client );
+        jack_client_close( _client );
+
+        _client = NULL;
+
+        s = init( s );
+
+        thaw_ports();
+
+        return s;
+    }
 }

nonlib/JACK/Client.H

@@ -24,10 +24,16 @@
 typedef jack_nframes_t nframes_t;
 typedef float sample_t;
 
+#include <list>
+
 namespace JACK
 {
+    class Port;
     class Client
     {
+
+        std::list <JACK::Port*> _active_ports;
+
         jack_client_t *_client;
 
         nframes_t _sample_rate;
@@ -55,6 +61,9 @@ namespace JACK
         Client ( const Client &rhs );
         Client & operator = ( const Client &rhs );
 
+        void freeze_ports ( void );
+        void thaw_ports ( void );
+
     protected:
 
         void deactivate ( void );
@@ -66,12 +75,16 @@ namespace JACK
 
     public:
 
-        jack_client_t * client ( void ) { return _client; }
+        jack_client_t * jack_client ( void ) { return _client; }
+
+        void port_added ( JACK::Port * p );
+        void port_removed ( JACK::Port *p );
 
         Client ( );
         virtual ~Client ( );
 
         const char * init ( const char *client_name );
+        const char * name ( const char * );
 
         nframes_t nframes ( void ) const { return jack_get_buffer_size( _client ); }
         float frame_rate ( void ) const { return jack_get_sample_rate( _client ); }

nonlib/JACK/Port.C

@@ -23,6 +23,7 @@
 
 #include <string.h>
 #include <stdio.h> // sprintf
+#include <errno.h>
 
 namespace JACK
 {
@@ -35,22 +36,36 @@ namespace JACK
         return jack_port_name_size() - jack_client_name_size() - 6;
     }
 
+
+    Port::Port ( const Port &rhs )
+    {
+        _freezer = rhs._freezer;
+        _client = rhs._client;
+        _port = rhs._port;
+        _name = strdup( rhs._name );
+
+        _client->port_added( this );
+    }
+
 /* nframes is the number of frames to buffer */
-    Port::Port ( jack_client_t *client, jack_port_t *port )
+    Port::Port ( JACK::Client *client, jack_port_t *port )
     {
+        _freezer = NULL;
         _client = client;
         _port = port;
-        _name = jack_port_name( _port );
+        _name = strdup( jack_port_name( _port ) );
     }
 
-    Port::Port ( jack_client_t *client, const char *name, type_e dir )
+    Port::Port ( JACK::Client *client, const char *name, type_e dir )
     {
+        _freezer = NULL;
         _client = client;
         activate( name, dir );
     }
 
-    Port::Port ( jack_client_t *client, type_e dir, const char *base, int n, const char *type )
+    Port::Port ( JACK::Client *client, type_e dir, const char *base, int n, const char *type )
     {
+        _freezer = NULL;
         _client = client;
 
         const char *name = name_for_port( dir, base, n, type );
@@ -58,8 +73,28 @@ namespace JACK
         activate( name, dir );
     }
 
+    Port::Port ( JACK::Client *client, type_e dir, int n, const char *type )
+    {
+        _freezer = NULL;
+        _client = client;
+
+        const char *name = name_for_port( dir, NULL, n, type );
+
+        activate( name, dir );
+    }
+
     Port::~Port ( )
     {
+        if ( _name )
+            free( _name );
+
+        _client->port_removed( this );
+/*         if ( _freezer ) */
+/*         { */
+/*             delete _freezer; */
+/*             _freezer = NULL; */
+/*         } */
+
 /*    if ( _port ) */
 /*         jack_port_unregister( _client, _port ); */
 
@@ -74,15 +109,22 @@ namespace JACK
 
         const char *dir_s = dir == Port::Output ? "out" : "in";
 
-        strncpy( pname, base, Port::max_name() );
+        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 );
+            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 );
+            snprintf( pname + l, sizeof( pname ) - l, "%s-%d", dir_s, n + 1 );
 
         return pname;
     }
@@ -90,11 +132,13 @@ namespace JACK
     void
     Port::activate ( const char *name, type_e dir )
     {
-        _name = name;
-        _port = jack_port_register( _client, _name,
+        _name = strdup( name );
+        _port = jack_port_register( _client->jack_client(), _name,
                                     JACK_DEFAULT_AUDIO_TYPE,
                                     dir == Output ? JackPortIsOutput : JackPortIsInput,
                                     0 );
+
+        _client->port_added( this );
     }
 
 /** returns the sum of latency of all ports between this one and a
@@ -107,7 +151,7 @@ namespace JACK
     nframes_t
     Port::total_latency ( void ) const
     {
-        return jack_port_get_total_latency( _client, _port );
+        return jack_port_get_total_latency( _client->jack_client() , _port );
     }
 
 /** returns the number of frames of latency assigned to this port */
@@ -128,14 +172,16 @@ namespace JACK
     Port::shutdown ( void )
     {
         if ( _port )
-            jack_port_unregister( _client, _port );
+            jack_port_unregister( _client->jack_client(), _port );
+
+        _client->port_removed( this );
     }
 
 /** rename port */
     bool
     Port::name ( const char *name )
     {
-        _name = name;
+        _name = strdup( name );
 
         return 0 == jack_port_set_name( _port, name );
     }
@@ -170,4 +216,78 @@ namespace JACK
         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;
+    }
+
+
+    void
+    Port::freeze ( void )
+    {
+        if ( _freezer )
+            delete _freezer;
+
+        freeze_state *f = new freeze_state();
+
+        f->connections = connections();
+        f->direction = type();
+        f->name = strdup( name() );
+
+        _freezer = f;
+    }
+
+    void
+    Port::thaw ( void )
+    {
+        activate( name(), _freezer->direction );
+
+        connections( _freezer->connections );
+
+        delete _freezer;
+        _freezer = NULL;
+    }
 }

nonlib/JACK/Port.H

@@ -21,14 +21,15 @@
 
 // #include <jack/jack.h>
 #include "Client.H"
+#include <stdlib.h>
 
 namespace JACK
 {
     class Port
     {
         jack_port_t *_port;
-        const char *_name;
-        jack_client_t *_client;
+        char *_name;
+        JACK::Client *_client;
 
         /* FIXME: reference count? */
 
@@ -42,18 +43,15 @@ namespace JACK
 
         static int max_name ( void );
 
-        Port ( jack_client_t *client, jack_port_t *port );
-        Port ( jack_client_t *client, const char *name, type_e dir );
-        Port ( jack_client_t *client, type_e dir, const char *base, int n, const char *type=0 );
+        Port ( JACK::Client *client, jack_port_t *port );
+        Port ( JACK::Client *client, const char *name, type_e dir );
+        Port ( JACK::Client *client, type_e dir, const char *base, int n, const char *type=0 );
+        Port ( JACK::Client *client, type_e dir, int n, const char *type=0 );
 
 //    Port ( );
         ~Port ( );
 
-/*     Port ( const Port & rhs ) */
-/*         { */
-/*             _port = rhs.port; */
-/*             _name = rhs.name; */
-/*         } */
+        Port ( const Port & rhs );
 
 
         bool valid ( void ) const { return _port; }
@@ -76,6 +74,45 @@ namespace JACK
         void read ( sample_t *buf, nframes_t nframes );
         void *buffer ( nframes_t nframes );
         void silence ( nframes_t nframes );
+
+        /*  */
+        const char ** connections ( void );
+        bool connections ( const char **port_names );
+        void freeze ( void );
+        void thaw ( void );
+
+    private:
+
+        /* holds all we need to know about a jack port to recreate it on a
+         new client */
+        struct freeze_state
+        {
+            const char **connections;
+            type_e direction;
+            char *name;
+
+            freeze_state ( )
+                {
+                    connections = NULL;
+                    name = NULL;
+                }
+
+            ~freeze_state ( )
+                {
+                    if ( connections )
+                    {
+                        free( connections );
+                        connections = NULL;
+                    }
+                    if ( name )
+                    {
+                        free( name );
+                    }
+                }
+        };
+
+        freeze_state *_freezer;
+
     };
 
 }