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 = -70;
38 AudioPlot::AudioPlot (wxWindow* parent)
42 SetDoubleBuffered (true);
44 for (int i = 0; i < MAX_AUDIO_CHANNELS; ++i) {
45 _channel_visible[i] = false;
48 for (int i = 0; i < AudioPoint::COUNT; ++i) {
49 _type_visible[i] = false;
52 _colours.push_back (wxColour ( 0, 0, 0));
53 _colours.push_back (wxColour (255, 0, 0));
54 _colours.push_back (wxColour ( 0, 255, 0));
55 _colours.push_back (wxColour (139, 0, 204));
56 _colours.push_back (wxColour ( 0, 0, 255));
57 _colours.push_back (wxColour (100, 100, 100));
59 Connect (wxID_ANY, wxEVT_PAINT, wxPaintEventHandler (AudioPlot::paint), 0, this);
61 SetMinSize (wxSize (640, 512));
65 AudioPlot::set_analysis (shared_ptr<AudioAnalysis> a)
69 for (int i = 0; i < MAX_AUDIO_CHANNELS; ++i) {
70 _channel_visible[i] = false;
73 for (int i = 0; i < AudioPoint::COUNT; ++i) {
74 _type_visible[i] = false;
81 AudioPlot::set_channel_visible (int c, bool v)
83 _channel_visible[c] = v;
88 AudioPlot::set_type_visible (int t, bool v)
95 AudioPlot::paint (wxPaintEvent &)
99 wxGraphicsContext* gc = wxGraphicsContext::Create (dc);
104 if (!_analysis || _analysis->channels() == 0) {
105 gc->SetFont (gc->CreateFont (*wxNORMAL_FONT));
106 gc->DrawText (_("Please wait; audio is being analysed..."), 32, 32);
110 wxGraphicsPath grid = gc->CreatePath ();
111 gc->SetFont (gc->CreateFont (*wxSMALL_FONT));
112 wxDouble db_label_width;
113 wxDouble db_label_height;
114 wxDouble db_label_descent;
115 wxDouble db_label_leading;
116 gc->GetTextExtent (_("-80dB"), &db_label_width, &db_label_height, &db_label_descent, &db_label_leading);
120 int const data_width = GetSize().GetWidth() - db_label_width;
121 /* Assume all channels have the same number of points */
122 float const xs = data_width / float (_analysis->points (0));
123 int const height = GetSize().GetHeight ();
125 float const ys = (height - yo) / -_minimum;
127 for (int i = _minimum; i <= 0; i += 10) {
128 int const y = (height - (i - _minimum) * ys) - yo;
129 grid.MoveToPoint (db_label_width - 4, y);
130 grid.AddLineToPoint (db_label_width + data_width, y);
131 gc->DrawText (std_to_wx (String::compose ("%1dB", i)), 0, y - (db_label_height / 2));
134 gc->SetPen (*wxLIGHT_GREY_PEN);
135 gc->StrokePath (grid);
137 gc->DrawText (_("Time"), data_width, height - yo + db_label_height / 2);
139 for (int c = 0; c < MAX_AUDIO_CHANNELS; ++c) {
140 if (!_channel_visible[c] || c >= _analysis->channels()) {
144 wxGraphicsPath path[AudioPoint::COUNT];
146 for (int i = 0; i < AudioPoint::COUNT; ++i) {
147 if (!_type_visible[i]) {
151 path[i] = gc->CreatePath ();
152 path[i].MoveToPoint (
154 height - (max (_analysis->get_point(c, 0)[i], float (_minimum)) - _minimum + _gain) * ys - yo
158 for (int i = 0; i < _analysis->points(c); ++i) {
159 for (int j = 0; j < AudioPoint::COUNT; ++j) {
160 if (!_type_visible[j]) {
164 path[j].AddLineToPoint (
165 i * xs + db_label_width,
166 height - (max (_analysis->get_point(c, i)[j], float (_minimum)) - _minimum + _gain) * ys - yo
171 wxColour const col = _colours[c];
173 if (_type_visible[AudioPoint::RMS]) {
174 gc->SetPen (*wxThePenList->FindOrCreatePen (col));
175 gc->StrokePath (path[AudioPoint::RMS]);
178 if (_type_visible[AudioPoint::PEAK]) {
179 gc->SetPen (*wxThePenList->FindOrCreatePen (wxColour (col.Red(), col.Green(), col.Blue(), col.Alpha() / 2)));
180 gc->StrokePath (path[AudioPoint::PEAK]);
184 wxGraphicsPath axes = gc->CreatePath ();
185 axes.MoveToPoint (db_label_width, 0);
186 axes.AddLineToPoint (db_label_width, height - yo);
187 axes.AddLineToPoint (db_label_width + data_width, height - yo);
188 gc->SetPen (*wxBLACK_PEN);
189 gc->StrokePath (axes);
195 AudioPlot::set_gain (float g)