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Mixer: Tweak spectrum view.

This commit is contained in:
Jonathan Moore Liles 2013-10-05 19:50:37 -07:00
parent 1b3994a5f1
commit 45a33b8467
4 changed files with 61 additions and 84 deletions
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5
mixer/src/Module.C
View File

@ -679,7 +679,8 @@ Module::draw_box ( int tx, int ty, int tw, int th )
bool
Module::show_analysis_window ( void )
{
nframes_t nframes = 4096;
/* use a large window for more accuracy at low frequencies */
nframes_t nframes = sample_rate() / 2;
float *buf = new float[nframes];
memset( buf, 0, sizeof(float) * nframes );
@ -698,8 +699,6 @@ Module::show_analysis_window ( void )
o->labelsize(10);
o->align(FL_ALIGN_RIGHT|FL_ALIGN_TOP);
o->sample_rate( sample_rate() );
/* o->minimum_frequency( 10 ); */
/* o->maximum_frequency( 50000 ); */
o->data( buf, nframes );
}

13
mixer/src/Module_Parameter_Editor.C
View File

@ -135,17 +135,20 @@ Module_Parameter_Editor::~Module_Parameter_Editor ( )
void
Module_Parameter_Editor::update_spectrum ( void )
{
nframes_t nframes = 4096;
nframes_t sample_rate = _module->sample_rate();
SpectrumView *o = spectrum_view;
o->sample_rate( sample_rate );
nframes_t nframes = sample_rate / 10;
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 ) )

114
mixer/src/SpectrumView.C
View File

@ -26,16 +26,15 @@
#include <cstdlib>
#include <cstring>
#include <map>
#include <string>
#include <assert.h>
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;
static std::map<std::string,float*> _cached_plan;
float SpectrumView::_fmin = 0;
float SpectrumView::_fmax = 0;
unsigned int SpectrumView::_sample_rate = 0;
void
SpectrumView::clear_bands ( void )
@ -53,12 +52,10 @@ SpectrumView::data ( float *data, unsigned int nframes )
delete[] _data;
_data = data;
_data_frames = nframes;
_nframes = nframes;
clear_bands();
impulse_frames( nframes );
redraw();
}
@ -67,7 +64,7 @@ SpectrumView::clear_plans ( void )
{
/* invalidate all plans */
for ( std::map<int,float*>::iterator i = _cached_plan.begin();
for ( std::map<std::string,float*>::iterator i = _cached_plan.begin();
i != _cached_plan.end();
i++ )
{
@ -84,23 +81,14 @@ SpectrumView::sample_rate ( unsigned int sample_rate )
{
_sample_rate = sample_rate;
_fmin = 10;
_fmax = 20000;
if ( _fmax > _sample_rate * 0.5f )
_fmax = _sample_rate * 0.5f;
clear_plans();
}
}
void
SpectrumView::impulse_frames ( unsigned int nframes )
{
if ( _nframes != nframes )
{
clear_plans();
_nframes = nframes;
}
}
#define min(a,b) (a<b?a:b)
#define max(a,b) (a<b?b:a)
@ -142,6 +130,14 @@ qft_plan ( unsigned frames, unsigned samples, float Fs, float Fmin, float Fmax )
return op;
}
const char *
plan_key ( unsigned int plan_size, unsigned int nframes )
{
static char s[256];
snprintf( s, sizeof(s), "%d:%d", plan_size, nframes );
return s;
}
/** Input should be an impulse response of an EQ. Output will be a
* buffer of /bands/ floats of dB values for each frequency band */
void
@ -153,10 +149,12 @@ SpectrumView::analyze_data ( unsigned int _plan_size )
float res[_plan_size * 2];
memset(res,0,sizeof(float) * _plan_size * 2);
if ( _cached_plan.find( _plan_size ) == _cached_plan.end() )
_cached_plan[_plan_size ] = qft_plan( _nframes, _plan_size, _sample_rate, _fmin, _fmax);
const char *key = plan_key( _plan_size, _nframes );
const float *plan = _cached_plan[_plan_size];
if ( _cached_plan.find( key ) == _cached_plan.end() )
_cached_plan[ key ] = qft_plan( _nframes, _plan_size, _sample_rate, _fmin, _fmax);
const float *plan = _cached_plan[ key ];
//Evaluate at set frequencies
for(unsigned i=0; i<_plan_size; ++i) {
@ -213,9 +211,9 @@ SpectrumView::~SpectrumView ( void )
SpectrumView::SpectrumView ( int X, int Y, int W, int H, const char *L )
: Fl_Box(X,Y,W,H,L)
{
_nframes = 0;
_auto_level = 0;
_data = 0;
_data_frames = 0;
_bands = 0;
_dbmin = -70;
_dbmax = 30;
@ -226,61 +224,53 @@ SpectrumView::SpectrumView ( int X, int Y, int W, int H, const char *L )
}
static int padding_right = 0;
static int padding_bottom = 0;
static int padding_bottom = 7;
void
SpectrumView::draw_semilog ( void )
{
int W = w() - padding_right;
int H = h() - padding_bottom;
char label[50];
/* char dash[] = {5,5 }; */
/* fl_line_style(0, 1, dash); */
fl_line_style(FL_SOLID,0);
fl_font( FL_HELVETICA_ITALIC, 7 );
//Db grid is easy, it is just a linear spacing
for(int i=0; i<8; ++i) {
int level = y()+H*i/8.0;
fl_line(x(), level, x()+W, level);
float value = (1-i/8.0)*(_dbmax-_dbmin) + _dbmin;
sprintf(label, "%.1f dB", value);
fl_draw(label, x(), level + 3, w(), 7, FL_ALIGN_RIGHT );
}
//The frequency grid is defined with points at
//10,11,12,...,18,19,20,30,40,50,60,70,80,90,100,200,400,...
//Thus we find each scale that we cover and draw the nine lines unique to
//that scale
const int min_base = logf(_fmin)/logf(10);
const int max_base = logf(_fmax)/logf(10);
const float b = logf(_fmin)/logf(10);
const float a = logf(_fmax)/logf(10)-b;
float lb = 1.0f / logf( 10 );
const int min_base = logf(_fmin)*lb;
const int max_base = logf(_fmax)*lb;
const float b = logf(_fmin)*lb;
const float a = logf(_fmax)*lb-b;
for(int i=min_base; i<=max_base; ++i) {
for(int j=1; j<10; ++j) {
const float freq = pow(10.0, i)*j;
const float xloc = (logf(freq)/logf(10)-b)/a;
const float xloc = (logf(freq)*lb-b)/a;
if(xloc<1.0 && xloc > -0.001)
fl_line(xloc*W+x(), y(), xloc*W+x(), y()+H);
}
}
fl_end_line();
fl_font( FL_HELVETICA_ITALIC, 7 );
//Place the text labels
char label[256];
for(int i=0; i<8; ++i) {
int level = (y()+H*i/8.0) + 3;
float value = (1-i/8.0)*(_dbmax-_dbmin) + _dbmin;
sprintf(label, "%.1f dB", value);
// fl_draw(label, x()+w() + 3, level);
fl_draw(label, x(), level, w(), 7, FL_ALIGN_RIGHT );
}
for(int i=min_base; i<=max_base; ++i) {
{
const float freq = pow(10.0, i)*1;
const float xloc = (logf(freq)/logf(10)-b)/a;
fl_line(xloc*W+x(), y(), xloc*W+x(), y()+H);
if ( j == 1 || j == 2 || j == 5 )
{
sprintf(label, "%0.f %s", freq < 1000.0 ? freq : freq / 1000.0, freq < 1000.0 ? "Hz" : "KHz" );
if(xloc<1.0)
fl_draw(label, xloc*W+x()+1, y()+h());
int sx = x() + xloc*W + 1;
if ( sx < x() * W - 20 )
fl_draw(label, sx, y()+h());
}
}
}
}
}
@ -294,11 +284,11 @@ SpectrumView::draw_curve ( void )
int W = w() - padding_right;
//Build lines
float inc = 1.0 / (float)W;
float inc = 1.0f / (float)W;
float fx = 0;
for( int i = 0; i < W; i++, fx += inc )
fl_vertex(fx, 1.0 - _bands[i]);
fl_vertex(fx, 1.0f - _bands[i]);
}
void
@ -310,16 +300,6 @@ 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 );
}

7
mixer/src/SpectrumView.H
View File

@ -25,10 +25,9 @@ class SpectrumView : public Fl_Box
static unsigned int _sample_rate;
static float _fmin;
static float _fmax;
static unsigned int _nframes;
unsigned int _nframes;
float * _data;
unsigned int _data_frames;
float * _bands;
float _dbmin;
float _dbmax;
@ -43,9 +42,6 @@ class SpectrumView : public Fl_Box
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 )
@ -55,7 +51,6 @@ 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 data_frames );