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/*
Copyright (C) 2013 Carl Hetherington <cth@carlh.net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
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.
*/
#include <iostream>
#include <boost/bind.hpp>
#include <wx/graphics.h>
#include "audio_plot.h"
#include "lib/decoder_factory.h"
#include "lib/audio_decoder.h"
#include "lib/audio_analysis.h"
#include "wx/wx_util.h"
using std::cout;
using std::vector;
using std::max;
using std::min;
using boost::bind;
using boost::shared_ptr;
int const AudioPlot::_minimum = -90;
AudioPlot::AudioPlot (wxWindow* parent)
: wxPanel (parent)
, _channel (0)
, _gain (0)
{
Connect (wxID_ANY, wxEVT_PAINT, wxPaintEventHandler (AudioPlot::paint), 0, this);
SetMinSize (wxSize (640, 512));
}
void
AudioPlot::set_analysis (shared_ptr<AudioAnalysis> a)
{
_analysis = a;
_channel = 0;
Refresh ();
}
void
AudioPlot::set_channel (int c)
{
_channel = c;
Refresh ();
}
void
AudioPlot::paint (wxPaintEvent &)
{
wxPaintDC dc (this);
wxGraphicsContext* gc = wxGraphicsContext::Create (dc);
if (!gc) {
return;
}
if (!_analysis) {
gc->SetFont (gc->CreateFont (*wxNORMAL_FONT));
gc->DrawText (_("Please wait; audio is being analysed..."), 32, 32);
return;
}
int const width = GetSize().GetWidth();
float const xs = width / float (_analysis->points (_channel));
int const height = GetSize().GetHeight ();
float const ys = height / -_minimum;
wxGraphicsPath grid = gc->CreatePath ();
gc->SetFont (gc->CreateFont (*wxSMALL_FONT));
for (int i = _minimum; i <= 0; i += 10) {
int const y = height - (i - _minimum) * ys;
grid.MoveToPoint (0, y);
grid.AddLineToPoint (width, y);
gc->DrawText (std_to_wx (String::compose ("%1dB", i)), width - 32, y - 12);
}
gc->SetPen (*wxLIGHT_GREY_PEN);
gc->StrokePath (grid);
wxGraphicsPath path[AudioPoint::COUNT];
for (int i = 0; i < AudioPoint::COUNT; ++i) {
path[i] = gc->CreatePath ();
path[i].MoveToPoint (0, height - (max (_analysis->get_point(_channel, 0)[i], float (_minimum)) - _minimum + _gain) * ys);
}
for (int i = 0; i < _analysis->points(_channel); ++i) {
for (int j = 0; j < AudioPoint::COUNT; ++j) {
path[j].AddLineToPoint (i * xs, height - (max (_analysis->get_point(_channel, i)[j], float (_minimum)) - _minimum + _gain) * ys);
}
}
gc->SetPen (*wxBLUE_PEN);
gc->StrokePath (path[AudioPoint::RMS]);
gc->SetPen (*wxRED_PEN);
gc->StrokePath (path[AudioPoint::PEAK]);
delete gc;
}
void
AudioPlot::set_gain (float g)
{
_gain = g;
Refresh ();
}
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