X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=gtk2_ardour%2Ffft_graph.cc;h=ec54acbaaae32e18e05eef28bc9ecbfb173897af;hb=9a45e0fde9eb6297ea4cc246aa2ef5d085ebe49b;hp=1edd483dab4f5148ba5d4b106cfbbaac1fbc86b4;hpb=23e7cf10191270d70357ccf0ed9294f020c7b7ab;p=ardour.git diff --git a/gtk2_ardour/fft_graph.cc b/gtk2_ardour/fft_graph.cc index 1edd483dab..ec54acbaaa 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 "pbd/i18n.h" using namespace std; using namespace Gtk; using namespace Gdk; -FFTGraph::FFTGraph(int windowSize) +FFTGraph::FFTGraph (int windowSize) { _logScale = 0; @@ -54,287 +56,488 @@ FFTGraph::FFTGraph(int windowSize) _hanning = 0; _logScale = 0; + _surface = 0; _a_window = 0; - _show_minmax = false; - _show_normalized = false; + _show_minmax = false; + _show_normalized = false; + _show_proportional = false; - setWindowSize(windowSize); + _ann_x = _ann_y = -1; + _yoff = v_margin; + _ann_area.width = 0; + _ann_area.height = 0; + + setWindowSize (windowSize); + set_events (Gdk::POINTER_MOTION_MASK | Gdk::LEAVE_NOTIFY_MASK | Gdk::BUTTON_PRESS_MASK); } 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); + + if (_surface) { + cairo_surface_destroy (_surface); + } } bool -FFTGraph::on_expose_event (GdkEventExpose* /*event*/) +FFTGraph::on_expose_event (GdkEventExpose* event) { - redraw(); - return true; -} + cairo_t* cr = gdk_cairo_create (GDK_DRAWABLE (get_window ()->gobj ())); + cairo_rectangle (cr, event->area.x, event->area.y, event->area.width, event->area.height); + cairo_clip (cr); -FFTResult * -FFTGraph::prepareResult(Gdk::Color color, string trackname) -{ - FFTResult *res = new FFTResult(this, color, trackname); + cairo_set_source_surface(cr, _surface, 0, 0); + cairo_paint (cr); - return res; -} + if (_ann_x > 0 && _ann_y > 0) { + const float x = _ann_x - hl_margin; + const float freq = expf(_fft_log_base * x / currentScaleWidth) * _fft_start; -void -FFTGraph::set_analysis_window(AnalysisWindow *a_window) -{ - _a_window = a_window; -} + std::stringstream ss; + if (freq >= 10000) { + ss << std::setprecision (1) << std::fixed << freq / 1000 << " kHz"; + } else if (freq >= 1000) { + ss << std::setprecision (2) << std::fixed << freq / 1000 << " kHz"; + } else { + ss << std::setprecision (0) << std::fixed << freq << " Hz"; + } + layout->set_text (ss.str ()); + int lw, lh; + layout->get_pixel_size (lw, lh); + lw|=1; lh|=1; -void -FFTGraph::draw_scales(Glib::RefPtr window) -{ + const float y0 = _ann_y - lh - 7; - Glib::RefPtr style = get_style(); - Glib::RefPtr black = style->get_black_gc(); - Glib::RefPtr white = style->get_white_gc(); + _ann_area.x = _ann_x - 1 - lw * .5; + _ann_area.y = y0 - 1; + _ann_area.width = lw + 3; + _ann_area.height = lh + 8; - window->draw_rectangle(black, true, 0, 0, width, height); + cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 0.7); + cairo_rectangle (cr, _ann_x - 1 - lw * .5, y0 - 1, lw + 2, lh + 2); + cairo_fill (cr); - /** - * 4 5 - * _ _ - * | | - * 1 | | 2 - * |________| - * 3 - **/ + cairo_move_to (cr, _ann_x , _ann_y - 0.5); + cairo_rel_line_to (cr, -3.0, -5.5); + cairo_rel_line_to (cr, 6, 0); + cairo_close_path (cr); + cairo_fill (cr); - // Line 1 - window->draw_line(white, h_margin, v_margin, h_margin, height - v_margin ); + cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 1.0); + cairo_move_to (cr, _ann_x - lw / 2, y0); + pango_cairo_update_layout (cr, layout->gobj ()); + pango_cairo_show_layout (cr, layout->gobj ()); - // Line 2 - window->draw_line(white, width - h_margin + 1, v_margin, width - h_margin + 1, height - v_margin ); + } - // Line 3 - window->draw_line(white, h_margin, height - v_margin, width - h_margin, height - v_margin ); +#ifdef HARLEQUIN_DEBUGGING + cairo_rectangle (cr, 0, 0, width, height); + cairo_set_source_rgba (cr, (random() % 255) / 255.f, (random() % 255) / 255.f, 0.0, 0.5); + cairo_fill (cr); +#endif -#define DB_METRIC_LENGTH 8 - // Line 4 - window->draw_line(white, h_margin - DB_METRIC_LENGTH, v_margin, h_margin, v_margin ); + cairo_destroy (cr); + return true; +} - // Line 5 - window->draw_line(white, width - h_margin + 1, v_margin, width - h_margin + DB_METRIC_LENGTH, v_margin ); +bool +FFTGraph::on_motion_notify_event (GdkEventMotion* ev) +{ + gint x, y; + x = (int) floor (ev->x); + y = (int) floor (ev->y); + if (x <= hl_margin + 1 || x >= width - hr_margin) { + x = -1; + } + if (y <= _yoff || y >= height - v_margin - 1) { + y = -1; + } - if (graph_gc == 0) { - graph_gc = GC::create( get_window() ); + if (x == _ann_x && y == _ann_y) { + return true; } + _ann_x = x; + _ann_y = y; - Color grey; + if (_ann_area.width == 0 || _ann_area.height == 0) { + queue_draw (); + } else { + queue_draw_area (_ann_area.x, _ann_area.y, _ann_area.width, _ann_area.height + 1); + } - grey.set_rgb_p(0.2, 0.2, 0.2); + if (_ann_x > 0 &&_ann_y > 0) { + queue_draw_area (_ann_x - _ann_area.width, _ann_y - _ann_area.height - 1, _ann_area.width * 2, _ann_area.height + 2); + } - graph_gc->set_rgb_fg_color( grey ); + return true; +} - if (layout == 0) { - layout = create_pango_layout (""); - layout->set_font_description (get_style()->get_font()); +bool +FFTGraph::on_leave_notify_event (GdkEventCrossing *) +{ + if (_ann_x == -1 && _ann_y == -1) { + return true; + } + _ann_x = _ann_y = -1; + if (_ann_area.width == 0 || _ann_area.height == 0) { + queue_draw (); + } else { + queue_draw_area (_ann_area.x, _ann_area.y, _ann_area.width, _ann_area.height + 1); } + _ann_area.width = _ann_area.height = 0; + return false; +} + +FFTResult * +FFTGraph::prepareResult (Gdk::Color color, string trackname) +{ + FFTResult *res = new FFTResult (this, color, trackname); - // Draw logscale - int logscale_pos = 0; - int position_on_scale; + return res; +} +void +FFTGraph::set_analysis_window (AnalysisWindow *a_window) +{ + _a_window = a_window; +} -/* 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 }; +int +FFTGraph::draw_scales (cairo_t* cr) +{ + int label_height = v_margin; - for (int x = 0; x < 10; x++) { + cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 1.0); + cairo_rectangle (cr, 0, 0, width, height); + cairo_fill (cr); - // i = 0.. _dataSize-1 - float freq_at_bin = (SR/2.0) * ((double)i / (double)_dataSize); + /* + * 1 5 + * _ _ + * | | + * 2 | | 4 + * |________| + * 3 + */ + + cairo_set_line_width (cr, 1.0); + cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 1.0); + cairo_move_to (cr, 3 , .5 + v_margin); + cairo_line_to (cr, .5 + hl_margin , .5 + v_margin); // 1 + cairo_line_to (cr, .5 + hl_margin , .5 + height - v_margin); // 2 + cairo_line_to (cr, 1.5 + width - hr_margin, .5 + height - v_margin); // 3 + cairo_line_to (cr, 1.5 + width - hr_margin, .5 + v_margin); // 4 + cairo_line_to (cr, width - 3 , .5 + v_margin); // 5 + cairo_stroke (cr); + + if (! layout) { + layout = create_pango_layout (""); + layout->set_font_description (get_style ()->get_font ()); + } + // Draw x-axis scale 1/3 octaves centered around 1K + int overlap = 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; } - freq_at_pixel = FFT_START * exp( FFT_RANGE * pixel / (double)(currentScaleWidth - 1) ); - } - */ + const float pos = currentScaleWidth * logf (freq / _fft_start) / _fft_log_base; + const int coord = floor (hl_margin + pos); - for (int x = 1; x < 8; x++) { - position_on_scale = (int)floor( (double)currentScaleWidth*(double)x/8.0); + 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; - while (_logScale[logscale_pos] < position_on_scale) - logscale_pos++; + if (coord + lw / 2 > width - hr_margin - 2) { + break; + } + if (v_margin / 2 + lh > label_height) { + label_height = v_margin / 2 + lh; + } - int coord = (int)(v_margin + 1.0 + position_on_scale); + cairo_set_source_rgba (cr, 0.2, 0.2, 0.2, 1.0); + cairo_move_to (cr, coord, v_margin); + cairo_line_to (cr, coord, height - v_margin - 1); + cairo_stroke (cr); + + cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 1.0); + cairo_move_to (cr, coord - lw / 2, v_margin / 2); + pango_cairo_update_layout (cr, layout->gobj ()); + pango_cairo_show_layout (cr, layout->gobj ()); + } - 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) ); + if (x != 0 && coord > overlap) { + continue; + } - std::string label = buf; + 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); - layout->set_text(label); + overlap = coord - lw - 3; - window->draw_line(graph_gc, coord, v_margin, coord, height - v_margin - 1); + 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; + } - int width, height; - layout->get_pixel_size (width, height); - window->draw_layout(white, coord - width / 2, v_margin / 2, layout); + cairo_set_source_rgba (cr, 0.2, 0.2, 0.2, 1.0); + cairo_move_to (cr, coord, v_margin); + cairo_line_to (cr, coord, height - v_margin - 1); + cairo_stroke (cr); + cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 1.0); + cairo_move_to (cr, coord - lw / 2, v_margin / 2); + pango_cairo_update_layout (cr, layout->gobj ()); + pango_cairo_show_layout (cr, layout->gobj ()); } + return label_height; } void -FFTGraph::redraw() +FFTGraph::redraw () { Glib::Threads::Mutex::Lock lm (_a_window->track_list_lock); - draw_scales(get_window()); + assert (_surface); + cairo_t* cr = cairo_create (_surface); + _yoff = draw_scales (cr); - if (_a_window == 0) + if (_a_window == 0) { + cairo_destroy (cr); + queue_draw (); return; + } - if (!_a_window->track_list_ready) + if (!_a_window->track_list_ready) { + cairo_destroy (cr); + queue_draw (); 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); - - - - // Find "session wide" min & max - float minf = 1000000000000.0; - float maxf = -1000000000000.0; - - TreeNodeChildren track_rows = _a_window->track_list.get_model()->children(); + float minf; + float maxf; - for (TreeIter i = track_rows.begin(); i != track_rows.end(); i++) { + TreeNodeChildren track_rows = _a_window->track_list.get_model ()->children (); - 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) { + cairo_destroy (cr); + queue_draw (); + 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_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 +548,121 @@ 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); + queue_draw (); } 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); - - update_size(); + width = max (requisition->width, minScaleWidth + hl_margin + hr_margin); + height = max (requisition->height, minScaleHeight + 2 + v_margin * 2); 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); + } + if (_surface) { + cairo_surface_destroy (_surface); } + _surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, width, height); + redraw (); } -