2 Copyright (C) 2013 Carl Hetherington <cth@carlh.net>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 #include <boost/bind.hpp>
22 #include <wx/graphics.h>
23 #include "audio_plot.h"
24 #include "lib/decoder_factory.h"
25 #include "lib/audio_decoder.h"
26 #include "lib/audio_analysis.h"
27 #include "wx/wx_util.h"
35 using boost::shared_ptr;
37 int const AudioPlot::_minimum = -70;
39 AudioPlot::AudioPlot (wxWindow* parent)
44 SetDoubleBuffered (true);
46 for (int i = 0; i < MAX_AUDIO_CHANNELS; ++i) {
47 _channel_visible[i] = false;
50 for (int i = 0; i < AudioPoint::COUNT; ++i) {
51 _type_visible[i] = false;
54 _colours.push_back (wxColour ( 0, 0, 0));
55 _colours.push_back (wxColour (255, 0, 0));
56 _colours.push_back (wxColour ( 0, 255, 0));
57 _colours.push_back (wxColour (139, 0, 204));
58 _colours.push_back (wxColour ( 0, 0, 255));
59 _colours.push_back (wxColour (100, 100, 100));
61 Connect (wxID_ANY, wxEVT_PAINT, wxPaintEventHandler (AudioPlot::paint), 0, this);
63 SetMinSize (wxSize (640, 512));
67 AudioPlot::set_analysis (shared_ptr<AudioAnalysis> a)
71 for (int i = 0; i < MAX_AUDIO_CHANNELS; ++i) {
72 _channel_visible[i] = false;
75 for (int i = 0; i < AudioPoint::COUNT; ++i) {
76 _type_visible[i] = false;
83 AudioPlot::set_channel_visible (int c, bool v)
85 _channel_visible[c] = v;
90 AudioPlot::set_type_visible (int t, bool v)
97 AudioPlot::paint (wxPaintEvent &)
101 wxGraphicsContext* gc = wxGraphicsContext::Create (dc);
106 if (!_analysis || _analysis->channels() == 0) {
107 gc->SetFont (gc->CreateFont (*wxNORMAL_FONT));
108 gc->DrawText (_("Please wait; audio is being analysed..."), 32, 32);
112 wxGraphicsPath grid = gc->CreatePath ();
113 gc->SetFont (gc->CreateFont (*wxSMALL_FONT));
114 wxDouble db_label_width;
115 wxDouble db_label_height;
116 wxDouble db_label_descent;
117 wxDouble db_label_leading;
118 gc->GetTextExtent (_("-80dB"), &db_label_width, &db_label_height, &db_label_descent, &db_label_leading);
122 int const data_width = GetSize().GetWidth() - db_label_width;
123 /* Assume all channels have the same number of points */
124 float const xs = data_width / float (_analysis->points (0));
125 int const height = GetSize().GetHeight ();
127 float const ys = (height - yo) / -_minimum;
129 for (int i = _minimum; i <= 0; i += 10) {
130 int const y = (height - (i - _minimum) * ys) - yo;
131 grid.MoveToPoint (db_label_width - 4, y);
132 grid.AddLineToPoint (db_label_width + data_width, y);
133 gc->DrawText (std_to_wx (String::compose ("%1dB", i)), 0, y - (db_label_height / 2));
136 gc->SetPen (*wxLIGHT_GREY_PEN);
137 gc->StrokePath (grid);
139 gc->DrawText (_("Time"), data_width, height - yo + db_label_height / 2);
141 for (int c = 0; c < MAX_AUDIO_CHANNELS; ++c) {
142 if (!_channel_visible[c] || c >= _analysis->channels()) {
146 wxGraphicsPath path[AudioPoint::COUNT];
148 for (int i = 0; i < AudioPoint::COUNT; ++i) {
149 if (!_type_visible[i]) {
153 path[i] = gc->CreatePath ();
155 float const val = 20 * log10 (_analysis->get_point(c, 0)[i]);
157 path[i].MoveToPoint (
159 height - (max (val, float (_minimum)) - _minimum + _gain) * ys - yo
163 list<float> smoothing[AudioPoint::COUNT];
165 for (int i = 0; i < _analysis->points(c); ++i) {
166 for (int j = 0; j < AudioPoint::COUNT; ++j) {
167 if (!_type_visible[j]) {
171 smoothing[j].push_back (_analysis->get_point(c, i)[j]);
172 if (int(smoothing[j].size()) > _smoothing) {
173 smoothing[j].pop_front ();
176 float const val = 20 * log10 (_analysis->smooth (smoothing[j], static_cast<AudioPoint::Type> (j)));
178 path[j].AddLineToPoint (
179 i * xs + db_label_width,
180 height - (max (val, float (_minimum)) - _minimum + _gain) * ys - yo
185 wxColour const col = _colours[c];
187 if (_type_visible[AudioPoint::RMS]) {
188 gc->SetPen (*wxThePenList->FindOrCreatePen (col));
189 gc->StrokePath (path[AudioPoint::RMS]);
192 if (_type_visible[AudioPoint::PEAK]) {
193 gc->SetPen (*wxThePenList->FindOrCreatePen (wxColour (col.Red(), col.Green(), col.Blue(), col.Alpha() / 2)));
194 gc->StrokePath (path[AudioPoint::PEAK]);
198 wxGraphicsPath axes = gc->CreatePath ();
199 axes.MoveToPoint (db_label_width, 0);
200 axes.AddLineToPoint (db_label_width, height - yo);
201 axes.AddLineToPoint (db_label_width + data_width, height - yo);
202 gc->SetPen (*wxBLACK_PEN);
203 gc->StrokePath (axes);
209 AudioPlot::set_gain (float g)
216 AudioPlot::set_smoothing (int s)