Mixer: Implement de-zippering for controls of all built-in modules.

mixer/src/AUX_Module.C

@@ -50,6 +50,8 @@ AUX_Module::AUX_Module ( ) : JACK_Module ( false )
     color( FL_DARK1 );
 
     copy_label( "Aux" );
+
+    smoothing.sample_rate( sample_rate() );
 }
 
 AUX_Module::~AUX_Module ( )
@@ -97,17 +99,39 @@ AUX_Module::number ( int n )
     copy_label( s );
 }
 
+void
+AUX_Module::handle_sample_rate_change ( nframes_t n )
+{
+    smoothing.sample_rate( n );
+}
+
 void
 AUX_Module::process ( nframes_t nframes )
 {
     if ( !bypass() )
     {
-        float g = DB_CO( control_input[0].control_value() );
+        float gt = DB_CO( control_input[0].control_value() );
  
-        for ( unsigned int i = 0; i < audio_input.size(); ++i )
+        if ( !smoothing.target_reached( gt ) )
         {
-            if ( audio_input[i].connected() )
+            sample_t gainbuf[nframes];
-                buffer_copy_and_apply_gain( (sample_t*)jack_output[i].buffer( nframes ), (sample_t*)audio_input[i].buffer(), nframes, g );
+        
+            smoothing.apply( gainbuf, nframes, gt );
+
+            for ( unsigned int i = 0; i < audio_input.size(); ++i )
+            {
+                if ( audio_input[i].connected() )
+                    buffer_copy_and_apply_gain_buffer( (sample_t*)jack_output[i].buffer( nframes ), (sample_t*)audio_input[i].buffer(), gainbuf, nframes );
+            }
+
+        }
+        else
+        {
+            for ( unsigned int i = 0; i < audio_input.size(); ++i )
+            {
+                if ( audio_input[i].connected() )
+                    buffer_copy_and_apply_gain( (sample_t*)jack_output[i].buffer( nframes ), (sample_t*)audio_input[i].buffer(), nframes, gt );
+            }
         }
     }
     else

mixer/src/AUX_Module.H

@@ -20,11 +20,14 @@
 #pragma once
 
 #include "JACK_Module.H"
+#include "dsp.h"
 
 class AUX_Module : public JACK_Module
 {
     int _number;
 
+    Value_Smoothing_Filter smoothing;
+
 protected:
 
     virtual void get ( Log_Entry &e ) const;
@@ -45,6 +48,8 @@ public:
 
     LOG_CREATE_FUNC( AUX_Module );
     
+    virtual void handle_sample_rate_change ( nframes_t n );
+
 protected:
 
     virtual void draw ( void );

mixer/src/Chain.C

@@ -250,13 +250,12 @@ Chain::initialize_with_default ( void )
         m->is_default( true );
         m->chain( this );
         m->configure_outputs( 1 );
-        m->initialize();
         add( m );
     }
 
     { Module *m = new Gain_Module();
         m->is_default( true );
-        m->initialize();
+        m->chain(this);
         add( m );
     }
 
@@ -268,7 +267,6 @@ Chain::initialize_with_default ( void )
     { JACK_Module *m = new JACK_Module();
         m->is_default( true );
         m->chain( this );
-        m->initialize();
         add( m );
     }
 }
@@ -462,6 +460,9 @@ Chain::name ( const char *name )
 
         engine()->buffer_size_callback( &Chain::buffer_size, this );
         engine()->port_connect_callback( &Chain::port_connect, this );
+        engine()->sample_rate_changed_callback( &Chain::sample_rate_change, this );
+
+        Module::set_sample_rate( engine()->sample_rate() );
         
         const char *jack_name = engine()->init( ename );
 
@@ -580,6 +581,7 @@ Chain::insert ( Module *m, Module *n )
               n->ncontrol_inputs(),
               n->ncontrol_outputs() );
 
+    n->initialize();
     return true;
 
 err:
@@ -829,6 +831,26 @@ Chain::buffer_size ( nframes_t nframes )
     }
 }
 
+int
+Chain::sample_rate_change ( nframes_t nframes, void *v )
+{
+    ((Chain*)v)->sample_rate_change( nframes );
+}
+
+int
+Chain::sample_rate_change ( nframes_t nframes )
+{
+    Module::set_sample_rate ( nframes );
+    for ( int i = 0; i < modules(); ++i )
+    {
+        Module *m = module(i);
+
+        m->handle_sample_rate_change( nframes );
+    }
+
+    return 0;
+}
+
 void
 Chain::port_connect ( jack_port_id_t a, jack_port_id_t b, int connect, void *v )
 {

mixer/src/Chain.H

@@ -74,6 +74,8 @@ private:
 
     static void buffer_size ( nframes_t nframes, void *v );
     void buffer_size ( nframes_t nframes );
+    static int sample_rate_change ( nframes_t nframes, void *v );
+    int sample_rate_change ( nframes_t nframes );
 
     
     static void port_connect ( jack_port_id_t a, jack_port_id_t b, int connect, void *v );

mixer/src/Engine/Engine.C

@@ -20,7 +20,7 @@
 
 #include "Engine.H"
 
-#include "../Mixer.H" // for process()
+// #include "../Mixer.H" // for process()
 
 /* This is the home of the JACK process callback */
 
@@ -37,6 +37,7 @@ Engine::Engine ( void (*process_callback)(nframes_t nframes, void *), void *user
     _buffer_size_callback = 0;
     _buffers_dropped = 0;
     _port_connect_callback = 0;
+    _sample_rate_changed_callback = 0;
 }
 
 Engine::~Engine ( )
@@ -53,6 +54,13 @@ Engine::buffer_size_callback (  void ( *buffer_size_callback ) ( nframes_t, void
     _buffer_size_callback_user_data = user_data;
 }
 
+void
+Engine::sample_rate_changed_callback ( int ( *sample_rate_changed_callback ) ( nframes_t, void * ), void *user_data )
+{
+    _sample_rate_changed_callback = sample_rate_changed_callback;
+    _sample_rate_changed_callback_user_data = user_data;
+}
+
 void
 Engine::port_connect_callback (  void ( *port_connect_callback ) ( jack_port_id_t a, jack_port_id_t b, int connect, void *arg), void *user_data )
 {
@@ -132,6 +140,14 @@ Engine::process ( nframes_t nframes )
     return 0;
 }
 
+int
+Engine::sample_rate_changed ( nframes_t srate )
+{
+    if ( _sample_rate_changed_callback )
+        return _sample_rate_changed_callback( srate, _sample_rate_changed_callback_user_data );
+    
+    return 0;
+}
 
 /* TRHEAD: RT */
 void

mixer/src/Engine/Engine.H

@@ -40,9 +40,13 @@ class Engine : public JACK::Client, public Mutex
     void ( * _buffer_size_callback ) ( nframes_t, void * );
     void *_buffer_size_callback_user_data;
 
+    int ( * _sample_rate_changed_callback ) ( nframes_t, void * );
+    void *_sample_rate_changed_callback_user_data;
+
     void ( * _port_connect_callback ) ( jack_port_id_t a, jack_port_id_t b, int connect, void * );
     void *_port_connect_callback_user_data;
 
+    int sample_rate_changed ( nframes_t srate );
     void shutdown ( void );
     int process ( nframes_t nframes );
     int xrun ( void );
@@ -67,5 +71,6 @@ public:
 
     int dropped ( void ) const { return _buffers_dropped; }
     void buffer_size_callback ( void ( *buffer_size_callback ) ( nframes_t, void * ), void *user_data );
+    void sample_rate_changed_callback ( int ( *sample_rate_changed_callback ) ( nframes_t, void * ), void *user_data );
     void port_connect_callback ( void ( *port_connect_callback ) ( jack_port_id_t a, jack_port_id_t b, int connect, void *arg), void *user_data );
 };

mixer/src/Gain_Module.C

@@ -45,6 +45,8 @@ Gain_Module::Gain_Module ( )
     end();
 
     log_create();
+
+    smoothing.sample_rate( sample_rate() );
 }
 
 Gain_Module::~Gain_Module ( )
@@ -71,6 +73,12 @@ Gain_Module::configure_inputs ( int n )
     return true;
 }
 
+void
+Gain_Module::handle_sample_rate_change ( nframes_t n )
+{
+    smoothing.sample_rate( n );
+}
+
 
 
 /**********/
@@ -80,13 +88,30 @@ Gain_Module::configure_inputs ( int n )
 void
 Gain_Module::process ( nframes_t nframes )
 {
-    float g = DB_CO( control_input[0].control_value() );
+    const float gt = DB_CO( control_input[0].control_value() );
 
-    for ( int i = audio_input.size(); i--; )
+    if ( !smoothing.target_reached( gt ) )
     {
-        if ( audio_input[i].connected() && audio_output[i].connected() )
+        sample_t gainbuf[nframes];
+        
+        smoothing.apply( gainbuf, nframes, gt );
+
+        for ( int i = audio_input.size(); i--; )
         {
-            buffer_apply_gain( (sample_t*)audio_input[i].buffer(), nframes, g );
+            if ( audio_input[i].connected() && audio_output[i].connected() )
+            {
+                sample_t *out = (sample_t*)audio_input[i].buffer();
+
+                buffer_apply_gain_buffer( out, gainbuf, nframes );
+            }
         }
     }
+    else
+        for ( int i = audio_input.size(); i--; )
+        {
+            if ( audio_input[i].connected() && audio_output[i].connected() )
+            {
+                buffer_apply_gain( (sample_t*)audio_input[i].buffer(), nframes, gt );
+            }
+        }
 }

mixer/src/Gain_Module.H

@@ -20,9 +20,12 @@
 #pragma once
 
 #include "Module.H"
+#include "dsp.h"
 
 class Gain_Module : public Module
 {
+    Value_Smoothing_Filter smoothing;
+
 public:
 
     Gain_Module ( );
@@ -38,6 +41,8 @@ public:
 
     MODULE_CLONE_FUNC( Gain_Module );
 
+    virtual void handle_sample_rate_change ( nframes_t n );
+
 protected:
 
     virtual void process ( nframes_t nframes );

mixer/src/Module.C

@@ -47,6 +47,7 @@
 
 
 
+nframes_t Module::_sample_rate = 0;
 Module *Module::_copied_module_empty = 0;
 char *Module::_copied_module_settings = 0;
 

mixer/src/Module.H

@@ -49,6 +49,7 @@ class Module : public Fl_Group, public Loggable {
 
     Module_Parameter_Editor *_editor;
 
+    static nframes_t _sample_rate;
     static Module *_copied_module_empty;
     static char *_copied_module_settings;
 
@@ -414,6 +415,9 @@ public:
 
     virtual void process ( nframes_t ) = 0;
 
+    /* called whenever the module is initialized or when the sample rate is changed at runtime */
+    virtual void handle_sample_rate_change ( nframes_t sample_rate ) {}
+        
     /* called whenever the value of a control port is changed.
        This can be used to take appropriate action from the GUI thread */
     virtual void handle_control_changed ( Port * );
@@ -436,6 +440,8 @@ public:
 
 protected:
 
+    nframes_t sample_rate ( void ) const { return Module::_sample_rate; }
+
     void draw_connections ( void );
     void draw_label ( int X, int Y, int W, int H );
     void draw_box ( int X, int Y, int W, int H );
@@ -448,6 +454,8 @@ protected:
 
 public:
 
+    static void set_sample_rate ( nframes_t srate ) { _sample_rate = srate; }
+
     void command_open_parameter_editor();
     virtual void command_activate ( void );
     virtual void command_deactivate ( void );

mixer/src/Mono_Pan_Module.C

@@ -47,6 +47,8 @@ Mono_Pan_Module::Mono_Pan_Module ( )
     end();
 
     log_create();
+ 
+    smoothing.sample_rate( sample_rate() );
 }
 
 Mono_Pan_Module::~Mono_Pan_Module ( )
@@ -57,6 +59,12 @@ Mono_Pan_Module::~Mono_Pan_Module ( )
 
 
 
+void
+Mono_Pan_Module::handle_sample_rate_change ( nframes_t n )
+{
+    smoothing.sample_rate( n );
+}
+
 bool
 Mono_Pan_Module::configure_inputs ( int )
 {
@@ -72,10 +80,6 @@ Mono_Pan_Module::configure_inputs ( int )
 void
 Mono_Pan_Module::process ( nframes_t nframes )
 {
-    const float g = control_input[0].control_value();
-
-    const float lg = (0.0f - g) + 1.0f;
-    const float rg = g + 1.0f;
 
     if ( audio_input[0].connected() &&
          audio_output[0].connected() &&
@@ -87,9 +91,38 @@ Mono_Pan_Module::process ( nframes_t nframes )
         }
         else
         {
-            buffer_copy_and_apply_gain( (sample_t*)audio_output[1].buffer(), (sample_t*)audio_input[0].buffer(), nframes, rg );
+            const float gt = (control_input[0].control_value() + 1.0f) * 0.5f;
 
-            buffer_apply_gain( (sample_t*)audio_output[0].buffer(), nframes, lg );
+            if ( ! smoothing.target_reached( gt ) )
+            {            
+                sample_t gainbuf[nframes];            
+            
+                smoothing.apply( gainbuf, nframes, gt );
+                
+                /* right channel */
+                
+                buffer_copy_and_apply_gain_buffer( (sample_t*)audio_output[1].buffer(),
+                                                   (sample_t*)audio_input[0].buffer(),
+                                                   gainbuf,
+                                                   nframes );
+                
+                /*  left channel  */
+                for ( nframes_t i = 0; i < nframes; i++ )
+                    gainbuf[i] = 1.0f - gainbuf[i];
+                
+                buffer_apply_gain_buffer( (sample_t*)audio_output[0].buffer(), gainbuf, nframes );
+            }
+            else
+            {
+                /* right channel */
+                buffer_copy_and_apply_gain( (sample_t*)audio_output[1].buffer(),
+                                                   (sample_t*)audio_input[0].buffer(),
+                                                   nframes,
+                                                   gt );
+                
+                /*  left channel  */
+                buffer_apply_gain( (sample_t*)audio_output[0].buffer(), nframes, 1.0f - gt);
+            }
         }
     }
 }

mixer/src/Mono_Pan_Module.H

@@ -20,9 +20,12 @@
 #pragma once
 
 #include "Module.H"
+#include "dsp.h"
 
 class Mono_Pan_Module : public Module
 {
+    Value_Smoothing_Filter smoothing;
+    
 public:
 
     Mono_Pan_Module ( );
@@ -37,6 +40,8 @@ public:
 
     MODULE_CLONE_FUNC( Mono_Pan_Module );
 
+    virtual void handle_sample_rate_change ( nframes_t n );
+    
 protected:
 
     virtual void process ( nframes_t nframes );

mixer/src/Plugin_Module.C

@@ -341,7 +341,7 @@ Plugin_Module::plugin_instances ( unsigned int n )
 
             DMESSAGE( "Instantiating plugin..." );
 
-            if ( ! (h = _idata->descriptor->instantiate( _idata->descriptor, Engine::sample_rate() ) ) )
+            if ( ! (h = _idata->descriptor->instantiate( _idata->descriptor, sample_rate() ) ) )
             {
                 WARNING( "Failed to instantiate plugin" );
                 return false;
@@ -474,7 +474,7 @@ Plugin_Module::load ( unsigned long id )
                     p.hints.minimum = _idata->descriptor->PortRangeHints[i].LowerBound;
                     if ( LADSPA_IS_HINT_SAMPLE_RATE(hd) )
                     {
-                        p.hints.minimum *= Engine::sample_rate();
+                        p.hints.minimum *= sample_rate();
                     }
                 }
                 if ( LADSPA_IS_HINT_BOUNDED_ABOVE(hd) )
@@ -483,7 +483,7 @@ Plugin_Module::load ( unsigned long id )
                     p.hints.maximum = _idata->descriptor->PortRangeHints[i].UpperBound;
                     if ( LADSPA_IS_HINT_SAMPLE_RATE(hd) )
                     {
-                        p.hints.maximum *= Engine::sample_rate();
+                        p.hints.maximum *= sample_rate();
                     }
                 }
 
@@ -500,7 +500,7 @@ Plugin_Module::load ( unsigned long id )
                         Min=_idata->descriptor->PortRangeHints[Port].LowerBound;
                         if (LADSPA_IS_HINT_SAMPLE_RATE(HintDesc))
                         {
-                            Min*=Engine::sample_rate();
+                            Min*=sample_rate();
                         }
                     }
                     if (LADSPA_IS_HINT_BOUNDED_ABOVE(HintDesc))
@@ -508,7 +508,7 @@ Plugin_Module::load ( unsigned long id )
                         Max=_idata->descriptor->PortRangeHints[Port].UpperBound;
                         if (LADSPA_IS_HINT_SAMPLE_RATE(HintDesc))
                         {
-                            Max*=Engine::sample_rate();
+                            Max*=sample_rate();
                         }
                     }
 
@@ -576,7 +576,7 @@ Plugin_Module::load ( unsigned long id )
                                 }
                             }
                             if (LADSPA_IS_HINT_SAMPLE_RATE(HintDesc)) {
-                                Default *= Engine::sample_rate();
+                                Default *= sample_rate();
                             }
                             if (LADSPA_IS_HINT_INTEGER(HintDesc)) {
                                 if ( p.hints.ranged &&

nonlib/JACK/Client.C

@@ -29,7 +29,7 @@
 namespace JACK
 {
 
-    nframes_t Client::_sample_rate = 0;
+//    nframes_t Client::_sample_rate = 0;
 
     Client::Client ( )
     {
@@ -114,6 +114,13 @@ namespace JACK
         ((Client*)arg)->port_connect( a, b, connect );
     }
 
+    int
+    Client::sample_rate_changed ( nframes_t srate, void *arg )
+    {
+//        ((Client*)arg)->_sample_rate = srate;
+        return ((Client*)arg)->sample_rate_changed( srate );
+    }
+
 /** Connect to JACK using client name /client_name/. Return a static
  * pointer to actual name as reported by JACK */
     const char *
@@ -131,6 +138,8 @@ namespace JACK
         set_callback( buffer_size );
         set_callback( port_connect );
 
+        jack_set_sample_rate_callback( _client, &Client::sample_rate_changed, this );
+
         /* FIXME: should we wait to register this until after the project
            has been loaded (and we have disk threads running)? */
         if ( opts & SLOW_SYNC )
@@ -143,7 +152,7 @@ namespace JACK
 
         jack_activate( _client );
 
-        _sample_rate = frame_rate();
+//        _sample_rate = frame_rate();
 
         return jack_get_client_name( _client );
     }

nonlib/JACK/Client.H

@@ -35,11 +35,13 @@ namespace JACK
 
         jack_client_t *_client;
 
-        static nframes_t _sample_rate;
+//        nframes_t _sample_rate;
         volatile int _xruns;
         volatile bool _freewheeling;
         volatile bool _zombified;
 
+        static int sample_rate_changed ( nframes_t srate, void *arg );
+        virtual int sample_rate_changed ( nframes_t srate ) { return 0; }
         static void port_connect ( jack_port_id_t a, jack_port_id_t b, int connect, void *arg );
         virtual void port_connect ( jack_port_id_t a, jack_port_id_t b, int connect ) { }
         static void shutdown ( void *arg );
@@ -93,15 +95,14 @@ namespace JACK
 
         void close ( void );
         nframes_t nframes ( void ) const { return jack_get_buffer_size( _client ); }
-        float frame_rate ( void ) const { return jack_get_sample_rate( _client ); }
+//        float frame_rate ( void ) const { return jack_get_sample_rate( _client ); }
-        static nframes_t sample_rate ( void ) { return _sample_rate; }
+        nframes_t sample_rate ( void ) const { return jack_get_sample_rate( _client ); }
         int xruns ( void ) const { return _xruns; };
         bool freewheeling ( void ) const { return _freewheeling; }
         void freewheeling ( bool yes );
         bool zombified ( void ) const { return _zombified; }
         float cpu_load ( void ) const { return jack_cpu_load( _client ); }
 
-
         void transport_stop ( void );
         void transport_start ( void );
         void transport_locate ( nframes_t frame );

nonlib/dsp.C

@@ -127,3 +127,37 @@ buffer_copy_and_apply_gain ( sample_t *dst, const sample_t *src, nframes_t nfram
     memcpy( dst, src, nframes * sizeof( sample_t ) );
     buffer_apply_gain( dst, nframes, gain );
 }
+
+void
+Value_Smoothing_Filter::sample_rate ( nframes_t n )
+{
+    const float FS = n;
+    const float T = 0.05f;
+   
+    w = 10.0f / (FS * T);  
+}
+
+void
+Value_Smoothing_Filter::apply( sample_t *dst, nframes_t nframes, float gt )
+{
+    const float a = 0.07f;
+    const float b = 1 + a;
+    
+    const float gm = b * gt;
+
+    float g1 = this->g1;
+    float g2 = this->g2;
+
+    for (nframes_t i = 0; i < nframes; i++)
+    {
+        g1 += w * (gm - g1 - a * g2);
+        g2 += w * (g1 - g2);
+        dst[i] = g2;
+    }
+
+    if ( fabsf( gt - g2 ) < 0.0001f )
+        g2 = gt;
+
+    this->g1 = g1;
+    this->g2 = g2;
+}

nonlib/dsp.h

@@ -35,6 +35,27 @@ bool buffer_is_digital_black ( sample_t *buf, nframes_t nframes );
 void buffer_copy ( sample_t *dst, const sample_t *src, nframes_t nframes );
 void buffer_copy_and_apply_gain ( sample_t *dst, const sample_t *src, nframes_t nframes, float gain );
 
+class Value_Smoothing_Filter
+{
+    float w, g1, g2;
+  
+
+public:
+
+    Value_Smoothing_Filter ( )
+    {
+        g1 = g2 = 0;
+    }
+
+    void sample_rate ( nframes_t v );
+    
+    inline bool target_reached ( float gt ) const { return gt == g2; }
+ 
+    void apply ( sample_t *dst, nframes_t nframes, float target );
+
+};
+
+
 // from SWH plugins.
 // Convert a value in dB's to a coefficent
 #define DB_CO(g) ((g) > -90.0f ? powf(10.0f, (g) * 0.05f) : 0.0f)

timeline/src/Engine/Engine.H

@@ -64,7 +64,7 @@ public:
 
     float frames_to_milliseconds ( nframes_t frames )
         {
-            return ( frames * 1000 ) / (float)frame_rate();
+            return ( frames * 1000 ) / (float)sample_rate();
         }
 };
 

timeline/src/Engine/Track.C

@@ -109,7 +109,7 @@ Track::configure_outputs ( int n )
     }
 
     if ( output.size() )
-        playback_ds = new Playback_DS( this, engine->frame_rate(), engine->nframes(), output.size() );
+        playback_ds = new Playback_DS( this, engine->sample_rate(), engine->nframes(), output.size() );
 
     /* FIXME: bogus */
     return true;
@@ -162,7 +162,7 @@ Track::configure_inputs ( int n )
     }
 
     if ( input.size() )
-        record_ds = new Record_DS( this, engine->frame_rate(), engine->nframes(), input.size() );
+        record_ds = new Record_DS( this, engine->sample_rate(), engine->nframes(), input.size() );
 
 //    engine->unlock();