Mixer: Fix some issues with the new spectrum view.

mixer/src/Module.C

@@ -682,8 +682,14 @@ Module::show_analysis_window ( void )
     nframes_t nframes = 4096;
     float *buf = new float[nframes];
 
+    memset( buf, 0, sizeof(float) * nframes );
+    
+    buf[0] = 1;
+       
     if ( ! get_impulse_response( buf, nframes ) )
-        return false;
+    {
+        // return false;
+    }
     
     Fl_Double_Window *w = new Fl_Double_Window( 1000, 500 );
 

mixer/src/Module_Parameter_Editor.C

@@ -48,6 +48,18 @@
 
 
 #include "SpectrumView.H"
+#include "string.h"
+
+bool
+Module_Parameter_Editor::is_probably_eq ( void )
+{
+    const char *name = _module->label();
+
+    return strcasestr( name, "eq" ) ||
+        strcasestr( name, "filter" ) ||
+        strcasestr( name, "parametric" ) ||
+        strcasestr( name, "band" );
+}
 
 Module_Parameter_Editor::Module_Parameter_Editor ( Module *module ) : Fl_Double_Window( 900,240)
 {
@@ -125,19 +137,28 @@ Module_Parameter_Editor::update_spectrum ( void )
 {
     nframes_t nframes = 4096;
     float *buf = new float[nframes];
+
+    memset( buf, 0, sizeof(float) * nframes );
+
+    buf[0] = 1;
+
     SpectrumView *o = spectrum_view;
 
     o->sample_rate( _module->sample_rate() );
 
+    bool show = false;
+
     if ( ! _module->get_impulse_response( buf, nframes ) )
-    {
-        o->data( buf, 1 );
-        /* o->hide(); */
-    }
+        show = is_probably_eq();
     else
+        show = true;
+
+    o->data( buf, nframes );
+
+    if ( show && ! o->parent()->visible() )
     {
-        o->data( buf, nframes );
         o->parent()->show();
+        update_control_visibility();
     }
 
     o->redraw();
@@ -156,7 +177,9 @@ Module_Parameter_Editor::make_controls ( void )
 
 
         Fl_Labelpad_Group *flg = new Fl_Labelpad_Group( (Fl_Widget*)o );
+
         flg->hide();
+
         control_pack->add( flg );
     }
 
@@ -417,10 +440,24 @@ Module_Parameter_Editor::make_controls ( void )
             controls_by_port[radius_port_number] = o;
     }
 
-    update_control_visibility();
-    
     update_spectrum();
 
+    update_control_visibility();
+}
+
+void 
+Module_Parameter_Editor::update_control_visibility ( void )
+{
+    for ( unsigned int i = 0; i < _module->control_input.size(); ++i )
+    {
+        const Module::Port *p = &_module->control_input[i];
+
+        if ( p->hints.visible )
+            controls_by_port[i]->parent()->show();
+        else
+            controls_by_port[i]->parent()->hide();
+    }
+
     control_pack->dolayout();
 
     int width = control_pack->w() + 100;
@@ -435,20 +472,7 @@ Module_Parameter_Editor::make_controls ( void )
 
     size( width, height );
     size_range( width, height, width, height );
-}
 
-void 
-Module_Parameter_Editor::update_control_visibility ( void )
-{
-    for ( unsigned int i = 0; i < _module->control_input.size(); ++i )
-    {
-        const Module::Port *p = &_module->control_input[i];
-
-        if ( p->hints.visible )
-            controls_by_port[i]->parent()->show();
-        else
-            controls_by_port[i]->parent()->hide();
-    }
 }
 
 void

mixer/src/Module_Parameter_Editor.H

@@ -79,6 +79,8 @@ class Module_Parameter_Editor : public Fl_Double_Window
     void make_controls ( void );
     void update_spectrum ( void );
     
+    bool is_probably_eq ( void );
+
     static void menu_cb ( Fl_Widget *w, void *v );
     void menu_cb ( Fl_Menu_ *m );
 

mixer/src/Plugin_Module.C

@@ -781,10 +781,6 @@ Plugin_Module::handle_port_connection_change ( void )
 bool 
 Plugin_Module::get_impulse_response ( sample_t *buf, nframes_t nframes )
 {
-    memset( buf, 0, sizeof( float ) * nframes );
-
-    buf[0] = 1;
-    
     apply( buf, nframes );
     
     if ( buffer_is_digital_black( buf + 1, nframes - 1 ))

mixer/src/SpectrumView.C

@@ -31,6 +31,7 @@
 
 static std::map<int,float*> _cached_plan;
 
+unsigned int SpectrumView::_nframes = 0;
 float SpectrumView::_fmin = 10;
 float SpectrumView::_fmax = 24000;
 unsigned int SpectrumView::_sample_rate = 48000;
@@ -52,13 +53,30 @@ SpectrumView::data ( float *data, unsigned int nframes )
         delete[] _data;
 
     _data = data;
-    _nframes = nframes;
-
+    _data_frames = nframes;
+    
     clear_bands();
 
+    impulse_frames( nframes );
+
     redraw();
 }
 
+void
+SpectrumView::clear_plans ( void )
+{
+    /* invalidate all plans */
+
+    for ( std::map<int,float*>::iterator i = _cached_plan.begin();
+          i != _cached_plan.end();
+          i++ )
+    {
+        delete[] i->second;
+    }
+
+    _cached_plan.clear();
+}
+
 void
 SpectrumView::sample_rate ( unsigned int sample_rate )
 {
@@ -68,16 +86,18 @@ SpectrumView::sample_rate ( unsigned int sample_rate )
         _fmin = 10;
         _fmax = _sample_rate * 0.5f;
 
-        /* invalidate all plans */
+        clear_plans();
+    }
+}
 
-        for ( std::map<int,float*>::iterator i = _cached_plan.begin();
-              i != _cached_plan.end();
-              i++ )
-        {
-            delete[] i->second;
-        }
+void
+SpectrumView::impulse_frames ( unsigned int nframes )
+{
+    if ( _nframes != nframes )
+    {
+        clear_plans();
 
-        _cached_plan.clear();
+        _nframes = nframes;
     }
 }
 
@@ -127,6 +147,9 @@ qft_plan ( unsigned frames, unsigned samples, float Fs, float Fmin, float Fmax )
 void
 SpectrumView::analyze_data ( unsigned int _plan_size )
 {
+    if ( ! _data )
+        return;
+
     float res[_plan_size * 2];
     memset(res,0,sizeof(float) * _plan_size * 2);
 
@@ -192,7 +215,7 @@ SpectrumView::SpectrumView ( int X, int Y, int W, int H, const char *L )
 {
     _auto_level = 0;
     _data = 0;
-    _nframes = 0;
+    _data_frames = 0;
     _bands = 0;
     _dbmin = -70;
     _dbmax = 30;
@@ -265,6 +288,9 @@ SpectrumView::draw_semilog ( void )
 void
 SpectrumView::draw_curve ( void )
 {
+    if ( !_bands )
+        return;
+
     int W = w() - padding_right;
 
     //Build lines
@@ -283,6 +309,16 @@ SpectrumView::draw ( void )
 
     int W = w() - padding_right;
     int H = h() - padding_bottom;
+
+    if ( _data_frames != _nframes )
+    {
+        /* invalid data */
+        if ( _data )
+            delete[] _data;
+        _data = 0;
+
+        clear_bands();
+    }
     
     if ( !_bands ) {
         analyze_data( W );

mixer/src/SpectrumView.H

@@ -25,9 +25,10 @@ class SpectrumView : public Fl_Box
     static unsigned int _sample_rate;
     static float _fmin;
     static float _fmax;
+    static unsigned int _nframes;
 
     float * _data;
-    unsigned int _nframes;
+    unsigned int _data_frames;
     float * _bands;
     float _dbmin;
     float _dbmax;
@@ -37,10 +38,14 @@ class SpectrumView : public Fl_Box
     void draw_semilog ( void );
     void analyze_data ( unsigned int plan_size );
     void clear_bands ( void );
+    static void clear_plans ( void );
 
 public:
     
     static void sample_rate ( unsigned int sample_rate );
+    /* all subsequent calls to data() MUST contain this number of
+     * frames. Changing this value will invalidate all cached plans */
+    static void impulse_frames ( unsigned int nframes );
 
     /* set dB range. If min == max, then auto leveling will be enabled */
     void db_range ( float min, float max )
@@ -50,8 +55,10 @@ public:
             _auto_level = min == max;
         }
 
+    
     /** /data/ must point to allocated memory. It will be freed when new data is set or when the control is destroyed */
-    void data ( float *data, unsigned int nframes );
+
+    void data ( float *data, unsigned int data_frames );
 
     SpectrumView ( int X, int Y, int W, int H, const char *L=0 );
     virtual ~SpectrumView ( );