diff options
Diffstat (limited to 'gtk2_ardour/fft_graph.cc')
| -rw-r--r-- | gtk2_ardour/fft_graph.cc | 483 |
1 files changed, 266 insertions, 217 deletions
diff --git a/gtk2_ardour/fft_graph.cc b/gtk2_ardour/fft_graph.cc index 1edd483dab..d9c8c10b15 100644 --- a/gtk2_ardour/fft_graph.cc +++ b/gtk2_ardour/fft_graph.cc @@ -14,7 +14,6 @@ You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ #ifdef COMPILER_MSVC @@ -40,12 +39,15 @@ using std::min; using std::max; #include "fft_graph.h" #include "analysis_window.h" +#include "public_editor.h" + +#include "i18n.h" using namespace std; using namespace Gtk; using namespace Gdk; -FFTGraph::FFTGraph(int windowSize) +FFTGraph::FFTGraph (int windowSize) { _logScale = 0; @@ -56,125 +58,127 @@ FFTGraph::FFTGraph(int windowSize) _a_window = 0; - _show_minmax = false; - _show_normalized = false; + _show_minmax = false; + _show_normalized = false; + _show_proportional = false; - setWindowSize(windowSize); + setWindowSize (windowSize); } void -FFTGraph::setWindowSize(int windowSize) +FFTGraph::setWindowSize (int windowSize) { if (_a_window) { Glib::Threads::Mutex::Lock lm (_a_window->track_list_lock); - setWindowSize_internal(windowSize); + setWindowSize_internal (windowSize); } else { - setWindowSize_internal(windowSize); + setWindowSize_internal (windowSize); } } void -FFTGraph::setWindowSize_internal(int windowSize) +FFTGraph::setWindowSize_internal (int windowSize) { // remove old tracklist & graphs if (_a_window) { - _a_window->clear_tracklist(); + _a_window->clear_tracklist (); } _windowSize = windowSize; _dataSize = windowSize / 2; if (_in != 0) { - fftwf_destroy_plan(_plan); - free(_in); + fftwf_destroy_plan (_plan); + free (_in); _in = 0; } if (_out != 0) { - free(_out); + free (_out); _out = 0; } if (_hanning != 0) { - free(_hanning); + free (_hanning); _hanning = 0; } if (_logScale != 0) { - free(_logScale); + free (_logScale); _logScale = 0; } // When destroying, window size is set to zero to free up memory - if (windowSize == 0) + if (windowSize == 0) { return; + } // FFT input & output buffers - _in = (float *) fftwf_malloc(sizeof(float) * _windowSize); - _out = (float *) fftwf_malloc(sizeof(float) * _windowSize); + _in = (float *) fftwf_malloc (sizeof (float) * _windowSize); + _out = (float *) fftwf_malloc (sizeof (float) * _windowSize); // Hanning window - _hanning = (float *) malloc(sizeof(float) * _windowSize); - + _hanning = (float *) malloc (sizeof (float) * _windowSize); // normalize the window double sum = 0.0; - for (int i=0; i < _windowSize; i++) { - _hanning[i]=0.81f * ( 0.5f - (0.5f * (float) cos(2.0f * M_PI * (float)i / (float)(_windowSize)))); + for (unsigned int i = 0; i < _windowSize; ++i) { + _hanning[i] = 0.5f - (0.5f * (float) cos (2.0f * M_PI * (float)i / (float)(_windowSize))); sum += _hanning[i]; } - double isum = 1.0 / sum; + double isum = 2.0 / sum; - for (int i=0; i < _windowSize; i++) { + for (unsigned int i = 0; i < _windowSize; i++) { _hanning[i] *= isum; } - _logScale = (int *) malloc(sizeof(int) * _dataSize); - //float count = 0; - for (int i = 0; i < _dataSize; i++) { + _logScale = (int *) malloc (sizeof (int) * _dataSize); + + for (unsigned int i = 0; i < _dataSize; i++) { _logScale[i] = 0; } - _plan = fftwf_plan_r2r_1d(_windowSize, _in, _out, FFTW_R2HC, FFTW_ESTIMATE); + _plan = fftwf_plan_r2r_1d (_windowSize, _in, _out, FFTW_R2HC, FFTW_MEASURE); } -FFTGraph::~FFTGraph() +FFTGraph::~FFTGraph () { // This will free everything - setWindowSize(0); + setWindowSize (0); } bool FFTGraph::on_expose_event (GdkEventExpose* /*event*/) { - redraw(); + redraw (); return true; } FFTResult * -FFTGraph::prepareResult(Gdk::Color color, string trackname) +FFTGraph::prepareResult (Gdk::Color color, string trackname) { - FFTResult *res = new FFTResult(this, color, trackname); + FFTResult *res = new FFTResult (this, color, trackname); return res; } void -FFTGraph::set_analysis_window(AnalysisWindow *a_window) +FFTGraph::set_analysis_window (AnalysisWindow *a_window) { _a_window = a_window; } -void -FFTGraph::draw_scales(Glib::RefPtr<Gdk::Window> window) +int +FFTGraph::draw_scales (Glib::RefPtr<Gdk::Window> window) { + int label_height = v_margin; - Glib::RefPtr<Gtk::Style> style = get_style(); - Glib::RefPtr<Gdk::GC> black = style->get_black_gc(); - Glib::RefPtr<Gdk::GC> white = style->get_white_gc(); + Glib::RefPtr<Gtk::Style> style = get_style (); + Glib::RefPtr<Gdk::GC> black = style->get_black_gc (); + Glib::RefPtr<Gdk::GC> white = style->get_white_gc (); - window->draw_rectangle(black, true, 0, 0, width, height); + window->draw_rectangle (black, true, 0, 0, width, height); /** * 4 5 @@ -186,97 +190,121 @@ FFTGraph::draw_scales(Glib::RefPtr<Gdk::Window> window) **/ // Line 1 - window->draw_line(white, h_margin, v_margin, h_margin, height - v_margin ); + window->draw_line (white, hl_margin, v_margin, hl_margin, height - v_margin); // Line 2 - window->draw_line(white, width - h_margin + 1, v_margin, width - h_margin + 1, height - v_margin ); + window->draw_line (white, width - hr_margin + 1, v_margin, width - hr_margin + 1, height - v_margin); // Line 3 - window->draw_line(white, h_margin, height - v_margin, width - h_margin, height - v_margin ); + window->draw_line (white, hl_margin, height - v_margin, width - hr_margin, height - v_margin); -#define DB_METRIC_LENGTH 8 // Line 4 - window->draw_line(white, h_margin - DB_METRIC_LENGTH, v_margin, h_margin, v_margin ); + window->draw_line (white, 3, v_margin, hl_margin, v_margin); // Line 5 - window->draw_line(white, width - h_margin + 1, v_margin, width - h_margin + DB_METRIC_LENGTH, v_margin ); - + window->draw_line (white, width - hr_margin + 1, v_margin, width - 3, v_margin); if (graph_gc == 0) { - graph_gc = GC::create( get_window() ); + graph_gc = GC::create (get_window ()); } Color grey; - - grey.set_rgb_p(0.2, 0.2, 0.2); - - graph_gc->set_rgb_fg_color( grey ); + grey.set_rgb_p (0.2, 0.2, 0.2); + graph_gc->set_rgb_fg_color (grey); if (layout == 0) { layout = create_pango_layout (""); - layout->set_font_description (get_style()->get_font()); + layout->set_font_description (get_style ()->get_font ()); } - // Draw logscale - int logscale_pos = 0; - int position_on_scale; - + // Draw x-axis scale 1/3 octaves centered around 1K + int overlap = 0; -/* TODO, write better scales and change the log function so that octaves are of equal pixel length - float scale_points[10] = { 55.0, 110.0, 220.0, 440.0, 880.0, 1760.0, 3520.0, 7040.0, 14080.0, 28160.0 }; + // make sure 1K (x=0) is visible + for (int x = 0; x < 27; ++x) { + float freq = powf (2.f, x / 3.0) * 1000.f; + if (freq <= _fft_start) { continue; } + if (freq >= _fft_end) { break; } - for (int x = 0; x < 10; x++) { - - // i = 0.. _dataSize-1 - float freq_at_bin = (SR/2.0) * ((double)i / (double)_dataSize); + const float pos = currentScaleWidth * logf (freq / _fft_start) / _fft_log_base; + const int coord = floor (hl_margin + pos); + if (coord < overlap) { + continue; + } + std::stringstream ss; + if (freq >= 10000) { + ss << std::setprecision (1) << std::fixed << freq / 1000 << "K"; + } else if (freq >= 1000) { + ss << std::setprecision (2) << std::fixed << freq / 1000 << "K"; + } else { + ss << std::setprecision (0) << std::fixed << freq << "Hz"; + } + layout->set_text (ss.str ()); + int lw, lh; + layout->get_pixel_size (lw, lh); + overlap = coord + lw + 3; - freq_at_pixel = FFT_START * exp( FFT_RANGE * pixel / (double)(currentScaleWidth - 1) ); + if (coord + lw / 2 > width - hr_margin - 2) { + break; + } + if (v_margin / 2 + lh > label_height) { + label_height = v_margin / 2 + lh; + } + window->draw_line (graph_gc, coord, v_margin, coord, height - v_margin - 1); + window->draw_layout (white, coord - lw / 2, v_margin / 2, layout); } - */ - - for (int x = 1; x < 8; x++) { - position_on_scale = (int)floor( (double)currentScaleWidth*(double)x/8.0); - - while (_logScale[logscale_pos] < position_on_scale) - logscale_pos++; - - int coord = (int)(v_margin + 1.0 + position_on_scale); - int SR = 44100; + // now from 1K down to 4Hz + for (int x = 0; x > -24; --x) { + float freq = powf (2.f, x / 3.0) * 1000.f; + if (freq >= _fft_end) { continue; } + if (freq <= _fft_start) { break; } - int rate_at_pos = (int)((double)(SR/2) * (double)logscale_pos / (double)_dataSize); + const float pos = currentScaleWidth * logf (freq / _fft_start) / _fft_log_base; + const int coord = floor (hl_margin + pos); - char buf[32]; - if (rate_at_pos < 1000) - snprintf(buf,32,"%dHz",rate_at_pos); - else - snprintf(buf,32,"%dk",(int)floor( (float)rate_at_pos/(float)1000) ); - - std::string label = buf; - - layout->set_text(label); - - window->draw_line(graph_gc, coord, v_margin, coord, height - v_margin - 1); - - int width, height; - layout->get_pixel_size (width, height); + if (x != 0 && coord > overlap) { + continue; + } - window->draw_layout(white, coord - width / 2, v_margin / 2, layout); + std::stringstream ss; + if (freq >= 10000) { + ss << std::setprecision (1) << std::fixed << freq / 1000 << "K"; + } else if (freq >= 1000) { + ss << std::setprecision (2) << std::fixed << freq / 1000 << "K"; + } else { + ss << std::setprecision (0) << std::fixed << freq << "Hz"; + } + layout->set_text (ss.str ()); + int lw, lh; + layout->get_pixel_size (lw, lh); + overlap = coord - lw - 3; + if (coord - lw / 2 < hl_margin + 2) { + break; + } + if (x == 0) { + // just get overlap position + continue; + } + if (v_margin / 2 + lh > label_height) { + label_height = v_margin / 2 + lh; + } + window->draw_line (graph_gc, coord, v_margin, coord, height - v_margin - 1); + window->draw_layout (white, coord - lw / 2, v_margin / 2, layout); } - + return label_height; } void -FFTGraph::redraw() +FFTGraph::redraw () { Glib::Threads::Mutex::Lock lm (_a_window->track_list_lock); - draw_scales(get_window()); - + int yoff = draw_scales (get_window ()); if (_a_window == 0) return; @@ -284,57 +312,105 @@ FFTGraph::redraw() if (!_a_window->track_list_ready) return; - cairo_t *cr; - cr = gdk_cairo_create(GDK_DRAWABLE(get_window()->gobj())); - cairo_set_line_width(cr, 1.5); - cairo_translate(cr, (float)v_margin + 1.0, (float)h_margin); - + float minf; + float maxf; + TreeNodeChildren track_rows = _a_window->track_list.get_model ()->children (); - // Find "session wide" min & max - float minf = 1000000000000.0; - float maxf = -1000000000000.0; - - TreeNodeChildren track_rows = _a_window->track_list.get_model()->children(); - - for (TreeIter i = track_rows.begin(); i != track_rows.end(); i++) { - - TreeModel::Row row = *i; - FFTResult *res = row[_a_window->tlcols.graph]; + if (!_show_normalized) { + maxf = 0.0f; + minf = -108.0f; + } else { + minf = 999.0f; + maxf = -999.0f; + for (TreeIter i = track_rows.begin (); i != track_rows.end (); i++) { + TreeModel::Row row = *i; + FFTResult *res = row[_a_window->tlcols.graph]; + + // disregard fft analysis from empty signals + if (res->minimum (_show_proportional) == res->maximum (_show_proportional)) { + continue; + } + // don't include invisible graphs + if (!row[_a_window->tlcols.visible]) { + continue; + } - // disregard fft analysis from empty signals - if (res->minimum() == res->maximum()) { - continue; + minf = std::min (minf, res->minimum (_show_proportional)); + maxf = std::max (maxf, res->maximum (_show_proportional)); } + } - if ( res->minimum() < minf) { - minf = res->minimum(); - } + // clamp range, > -200dBFS, at least 24dB (two y-axis labels) range + minf = std::max (-200.f, minf); + if (maxf <= minf) { + return; + } - if ( res->maximum() > maxf) { - maxf = res->maximum(); - } + if (maxf - minf < 24) { + maxf += 6.f; + minf = maxf - 24.f; } - if (!_show_normalized) { - minf = -150.0f; - maxf = 0.0f; + cairo_t *cr; + cr = gdk_cairo_create (GDK_DRAWABLE (get_window ()->gobj ())); + cairo_set_line_width (cr, 1.5); + cairo_translate (cr, hl_margin + 1, yoff); + + float fft_pane_size_w = width - hl_margin - hr_margin; + float fft_pane_size_h = height - v_margin - 1 - yoff; + double pixels_per_db = (double)fft_pane_size_h / (double)(maxf - minf); + + // draw y-axis dB + cairo_set_source_rgba (cr, .8, .8, .8, 1.0); + + int btm_lbl = fft_pane_size_h; + { + // y-axis legend + layout->set_text (_("dBFS")); + int lw, lh; + layout->get_pixel_size (lw, lh); + cairo_move_to (cr, -2 - lw, fft_pane_size_h - lh / 2); + pango_cairo_update_layout (cr, layout->gobj ()); + pango_cairo_show_layout (cr, layout->gobj ()); + btm_lbl = fft_pane_size_h - lh; } - //int graph_height = height - 2 * h_margin; + for (int x = -6; x >= -200; x -= 12) { + float yp = 1.5 + fft_pane_size_h - rint ((x - minf) * pixels_per_db); + assert (layout); + std::stringstream ss; + ss << x; + layout->set_text (ss.str ()); + int lw, lh; + layout->get_pixel_size (lw, lh); + if (yp + 2 + lh / 2 > btm_lbl) { + continue; + } + if (yp < 2 + lh / 2) { + continue; + } - float fft_pane_size_w = (float)(width - 2*v_margin) - 1.0; - float fft_pane_size_h = (float)(height - 2*h_margin); + cairo_set_source_rgba (cr, .8, .8, .8, 1.0); + cairo_move_to (cr, -2 - lw, yp - lh / 2); + pango_cairo_update_layout (cr, layout->gobj ()); + pango_cairo_show_layout (cr, layout->gobj ()); - double pixels_per_db = (double)fft_pane_size_h / (double)(maxf - minf); + cairo_set_source_rgba (cr, .2, .2, .2, 1.0); + cairo_move_to (cr, 0, yp); + cairo_line_to (cr, fft_pane_size_w, yp); + cairo_stroke (cr); + } - cairo_rectangle(cr, 0.0, 0.0, fft_pane_size_w, fft_pane_size_h); - cairo_clip(cr); + cairo_rectangle (cr, 1, 1, fft_pane_size_w, fft_pane_size_h); + cairo_clip (cr); - for (TreeIter i = track_rows.begin(); i != track_rows.end(); i++) { + cairo_set_line_cap (cr, CAIRO_LINE_CAP_BUTT); + cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND); + for (TreeIter i = track_rows.begin (); i != track_rows.end (); i++) { TreeModel::Row row = *i; // don't show graphs for tracks which are deselected @@ -345,144 +421,117 @@ FFTGraph::redraw() FFTResult *res = row[_a_window->tlcols.graph]; // don't show graphs for empty signals - if (res->minimum() == res->maximum()) { + if (res->minimum (_show_proportional) == res->maximum (_show_proportional)) { continue; } float mpp; + float X,Y; if (_show_minmax) { - mpp = -1000000.0; - cairo_set_source_rgba(cr, res->get_color().get_red_p(), res->get_color().get_green_p(), res->get_color().get_blue_p(), 0.30); - cairo_move_to(cr, 0.5f + (float)_logScale[0], 0.5f + (float)( fft_pane_size_h - (int)floor( (res->maxAt(0) - minf) * pixels_per_db) )); + X = 0.5f + _logScale[0]; + Y = 1.5f + fft_pane_size_h - pixels_per_db * (res->maxAt (0, _show_proportional) - minf); + cairo_move_to (cr, X, Y); // Draw the line of maximum values - for (int x = 1; x < res->length(); x++) { - if (res->maxAt(x) > mpp) - mpp = res->maxAt(x); - mpp = fmax(mpp, minf); - mpp = fmin(mpp, maxf); - - // If the next point on the log scale is at the same location, - // don't draw yet - if (x + 1 < res->length() && _logScale[x] == _logScale[x + 1]) { + mpp = minf; + for (unsigned int x = 1; x < res->length () - 1; ++x) { + mpp = std::max (mpp, res->maxAt (x, _show_proportional)); + + if (_logScale[x] == _logScale[x + 1]) { continue; } - float X = 0.5f + (float)_logScale[x]; - float Y = 0.5f + (float)( fft_pane_size_h - (int)floor( (mpp - minf) * pixels_per_db) ); - - cairo_line_to(cr, X, Y); - - mpp = -1000000.0; + mpp = fmin (mpp, maxf); + X = 0.5f + _logScale[x]; + Y = 1.5f + fft_pane_size_h - pixels_per_db * (mpp - minf); + cairo_line_to (cr, X, Y); + mpp = minf; } - mpp = +10000000.0; + mpp = maxf; // Draw back to the start using the minimum value - for (int x = res->length()-1; x >= 0; x--) { - if (res->minAt(x) < mpp) - mpp = res->minAt(x); - mpp = fmax(mpp, minf); - mpp = fmin(mpp, maxf); - - // If the next point on the log scale is at the same location, - // don't draw yet - if (x - 1 > 0 && _logScale[x] == _logScale[x - 1]) { + for (int x = res->length () - 1; x >= 0; --x) { + mpp = std::min (mpp, res->minAt (x, _show_proportional)); + + if (_logScale[x] == _logScale[x + 1]) { continue; } - float X = 0.5f + (float)_logScale[x]; - float Y = 0.5f + (float)( fft_pane_size_h - (int)floor( (mpp - minf) * pixels_per_db) ); - - cairo_line_to(cr, X, Y ); - - mpp = +10000000.0; + mpp = fmax (mpp, minf); + X = 0.5f + _logScale[x]; + Y = 1.5f + fft_pane_size_h - pixels_per_db * (mpp - minf); + cairo_line_to (cr, X, Y); + mpp = maxf; } - cairo_close_path(cr); - - cairo_fill(cr); + cairo_set_source_rgba (cr, res->get_color ().get_red_p (), res->get_color ().get_green_p (), res->get_color ().get_blue_p (), 0.30); + cairo_close_path (cr); + cairo_fill (cr); } + // draw max of averages + X = 0.5f + _logScale[0]; + Y = 1.5f + fft_pane_size_h - pixels_per_db * (res->avgAt (0, _show_proportional) - minf); + cairo_move_to (cr, X, Y); + mpp = minf; + for (unsigned int x = 0; x < res->length () - 1; x++) { + mpp = std::max (mpp, res->avgAt (x, _show_proportional)); - // Set color from track - cairo_set_source_rgb(cr, res->get_color().get_red_p(), res->get_color().get_green_p(), res->get_color().get_blue_p()); - - mpp = -1000000.0; - - cairo_move_to(cr, 0.5, fft_pane_size_h-0.5); - - for (int x = 0; x < res->length(); x++) { - - - if (res->avgAt(x) > mpp) - mpp = res->avgAt(x); - mpp = fmax(mpp, minf); - mpp = fmin(mpp, maxf); - - // If the next point on the log scale is at the same location, - // don't draw yet - if (x + 1 < res->length() && _logScale[x] == _logScale[x + 1]) { + if (_logScale[x] == _logScale[x + 1]) { continue; } - cairo_line_to(cr, 0.5f + (float)_logScale[x], 0.5f + (float)( fft_pane_size_h - (int)floor( (mpp - minf) * pixels_per_db) )); + mpp = fmax (mpp, minf); + mpp = fmin (mpp, maxf); - mpp = -1000000.0; + X = 0.5f + _logScale[x]; + Y = 1.5f + fft_pane_size_h - pixels_per_db * (mpp - minf); + cairo_line_to (cr, X, Y); + mpp = minf; } - cairo_stroke(cr); + cairo_set_source_rgb (cr, res->get_color ().get_red_p (), res->get_color ().get_green_p (), res->get_color ().get_blue_p ()); + cairo_stroke (cr); } - - cairo_destroy(cr); + cairo_destroy (cr); } void -FFTGraph::on_size_request(Gtk::Requisition* requisition) +FFTGraph::on_size_request (Gtk::Requisition* requisition) { - width = max(requisition->width, minScaleWidth + h_margin * 2); - height = max(requisition->height, minScaleHeight + 2 + v_margin * 2); + width = max (requisition->width, minScaleWidth + hl_margin + hr_margin); + height = max (requisition->height, minScaleHeight + 2 + v_margin * 2); - update_size(); + update_size (); requisition->width = width;; requisition->height = height; } void -FFTGraph::on_size_allocate(Gtk::Allocation & alloc) +FFTGraph::on_size_allocate (Gtk::Allocation & alloc) { - width = alloc.get_width(); - height = alloc.get_height(); + width = alloc.get_width (); + height = alloc.get_height (); - update_size(); + update_size (); DrawingArea::on_size_allocate (alloc); } void -FFTGraph::update_size() +FFTGraph::update_size () { - currentScaleWidth = width - h_margin*2; - currentScaleHeight = height - 2 - v_margin*2; - - float SR = 44100; - float FFT_START = SR/(double)_dataSize; - float FFT_END = SR/2.0; - float FFT_RANGE = log( FFT_END / FFT_START); - float pixel = 0; - for (int i = 0; i < _dataSize; i++) { - float freq_at_bin = (SR/2.0) * ((double)i / (double)_dataSize); - float freq_at_pixel; - pixel--; - do { - pixel++; - freq_at_pixel = FFT_START * exp( FFT_RANGE * pixel / (double)(currentScaleWidth - 1) ); - } while (freq_at_bin > freq_at_pixel); - - _logScale[i] = (int)floor(pixel); + framecnt_t SR = PublicEditor::instance ().session ()->nominal_frame_rate (); + _fft_start = SR / (double)_dataSize; + _fft_end = .5 * SR; + _fft_log_base = logf (.5 * _dataSize); + currentScaleWidth = width - hl_margin - hr_margin; + _logScale[0] = 0; + for (unsigned int i = 1; i < _dataSize; ++i) { + _logScale[i] = floor (currentScaleWidth * logf (.5 * i) / _fft_log_base); } } - |