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"
34 using boost::shared_ptr;
36 int const AudioPlot::_minimum = -90;
38 AudioPlot::AudioPlot (wxWindow* parent)
42 SetDoubleBuffered (true);
43 #if wxMAJOR_VERSION == 2 && wxMINOR_VERSION >= 9
44 SetBackgroundStyle (wxBG_STYLE_PAINT);
47 for (int i = 0; i < MAX_AUDIO_CHANNELS; ++i) {
48 _channel_visible[i] = false;
51 for (int i = 0; i < AudioPoint::COUNT; ++i) {
52 _type_visible[i] = false;
55 _colours.push_back (wxColour ( 0, 0, 0));
56 _colours.push_back (wxColour (255, 0, 0));
57 _colours.push_back (wxColour ( 0, 255, 0));
58 _colours.push_back (wxColour (139, 0, 204));
59 _colours.push_back (wxColour ( 0, 0, 255));
60 _colours.push_back (wxColour (100, 100, 100));
62 Connect (wxID_ANY, wxEVT_PAINT, wxPaintEventHandler (AudioPlot::paint), 0, this);
64 SetMinSize (wxSize (640, 512));
68 AudioPlot::set_analysis (shared_ptr<AudioAnalysis> a)
72 for (int i = 0; i < MAX_AUDIO_CHANNELS; ++i) {
73 _channel_visible[i] = false;
76 for (int i = 0; i < AudioPoint::COUNT; ++i) {
77 _type_visible[i] = false;
84 AudioPlot::set_channel_visible (int c, bool v)
86 _channel_visible[c] = v;
91 AudioPlot::set_type_visible (int t, bool v)
98 AudioPlot::paint (wxPaintEvent &)
102 wxGraphicsContext* gc = wxGraphicsContext::Create (dc);
108 gc->SetFont (gc->CreateFont (*wxNORMAL_FONT));
109 gc->DrawText (_("Please wait; audio is being analysed..."), 32, 32);
113 int const width = GetSize().GetWidth();
114 /* Assume all channels have the same number of points */
115 float const xs = width / float (_analysis->points (0));
116 int const height = GetSize().GetHeight ();
117 float const ys = height / -_minimum;
119 wxGraphicsPath grid = gc->CreatePath ();
120 gc->SetFont (gc->CreateFont (*wxSMALL_FONT));
121 for (int i = _minimum; i <= 0; i += 10) {
122 int const y = height - (i - _minimum) * ys;
123 grid.MoveToPoint (0, y);
124 grid.AddLineToPoint (width, y);
125 gc->DrawText (std_to_wx (String::compose ("%1dB", i)), width - 32, y - 12);
127 gc->SetPen (*wxLIGHT_GREY_PEN);
128 gc->StrokePath (grid);
130 for (int c = 0; c < MAX_AUDIO_CHANNELS; ++c) {
131 if (!_channel_visible[c] || c >= _analysis->channels()) {
135 wxGraphicsPath path[AudioPoint::COUNT];
137 for (int i = 0; i < AudioPoint::COUNT; ++i) {
138 if (!_type_visible[i]) {
142 path[i] = gc->CreatePath ();
143 path[i].MoveToPoint (0, height - (max (_analysis->get_point(c, 0)[i], float (_minimum)) - _minimum + _gain) * ys);
146 for (int i = 0; i < _analysis->points(c); ++i) {
147 for (int j = 0; j < AudioPoint::COUNT; ++j) {
148 if (!_type_visible[j]) {
152 path[j].AddLineToPoint (i * xs, height - (max (_analysis->get_point(c, i)[j], float (_minimum)) - _minimum + _gain) * ys);
156 wxColour const col = _colours[c];
158 if (_type_visible[AudioPoint::RMS]) {
159 gc->SetPen (*wxThePenList->FindOrCreatePen (col));
160 gc->StrokePath (path[AudioPoint::RMS]);
163 if (_type_visible[AudioPoint::PEAK]) {
164 gc->SetPen (*wxThePenList->FindOrCreatePen (wxColour (col.Red(), col.Green(), col.Blue(), col.Alpha() / 2)));
165 gc->StrokePath (path[AudioPoint::PEAK]);
173 AudioPlot::set_gain (float g)