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/*
Copyright (C) 2015 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 "video_waveform_plot.h"
#include "film_viewer.h"
#include "wx_util.h"
#include "lib/image.h"
#include "lib/raw_convert.h"
#include "lib/dcp_video.h"
#include <dcp/openjpeg_image.h>
#include <wx/rawbmp.h>
#include <wx/graphics.h>
#include <boost/bind.hpp>
#include <iostream>
using std::cout;
using std::min;
using std::string;
using boost::weak_ptr;
using boost::shared_ptr;
int const VideoWaveformPlot::_vertical_margin = 8;
VideoWaveformPlot::VideoWaveformPlot (wxWindow* parent, FilmViewer* viewer)
: wxPanel (parent, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxFULL_REPAINT_ON_RESIZE)
, _dirty (true)
, _enabled (false)
, _component (0)
, _contrast (0)
{
#ifndef __WXOSX__
SetDoubleBuffered (true);
#endif
_viewer_connection = viewer->ImageChanged.connect (boost::bind (&VideoWaveformPlot::set_image, this, _1));
Bind (wxEVT_PAINT, boost::bind (&VideoWaveformPlot::paint, this));
Bind (wxEVT_SIZE, boost::bind (&VideoWaveformPlot::sized, this, _1));
SetMinSize (wxSize (640, 512));
SetBackgroundColour (wxColour (0, 0, 0));
}
void
VideoWaveformPlot::paint ()
{
wxPaintDC dc (this);
if (_dirty) {
create_waveform ();
_dirty = false;
}
if (!_waveform) {
return;
}
wxGraphicsContext* gc = wxGraphicsContext::Create (dc);
if (!gc) {
return;
}
int const axis_x = 48;
int const height = _waveform->size().height;
gc->SetPen (wxPen (wxColour (255, 255, 255), 1, wxPENSTYLE_SOLID));
gc->SetFont (gc->CreateFont (*wxSMALL_FONT, wxColour (255, 255, 255)));
double label_width;
double label_height;
double label_descent;
double label_leading;
gc->GetTextExtent (wxT ("1024"), &label_width, &label_height, &label_descent, &label_leading);
double extra[3];
double w;
gc->GetTextExtent (wxT ("0"), &w, &label_height, &label_descent, &label_leading);
extra[0] = label_width - w;
gc->GetTextExtent (wxT ("64"), &w, &label_height, &label_descent, &label_leading);
extra[1] = label_width - w;
gc->GetTextExtent (wxT ("512"), &w, &label_height, &label_descent, &label_leading);
extra[2] = label_width - w;
int label_gaps = 2;
while (height / label_gaps > 64) {
label_gaps *= 2;
}
for (int i = 0; i < label_gaps + 1; ++i) {
wxGraphicsPath p = gc->CreatePath ();
int const y = _vertical_margin + height - (i * height / label_gaps) - 1;
p.MoveToPoint (label_width + 8, y);
p.AddLineToPoint (axis_x, y);
gc->StrokePath (p);
int x = 4;
int const n = i * 4096 / label_gaps;
if (n < 10) {
x += extra[0];
} else if (n < 100) {
x += extra[1];
} else if (n < 1000) {
x += extra[2];
}
gc->DrawText (std_to_wx (raw_convert<string> (n)), x, y - (label_height / 2));
}
wxImage waveform (_waveform->size().width, height, _waveform->data()[0], true);
wxBitmap bitmap (waveform);
gc->DrawBitmap (bitmap, axis_x + 4, _vertical_margin, _waveform->size().width, height);
delete gc;
}
void
VideoWaveformPlot::create_waveform ()
{
_waveform.reset ();
if (!_image) {
return;
}
dcp::Size const size = _image->size();
_waveform.reset (new Image (PIX_FMT_RGB24, dcp::Size (size.width, size.height), true));
for (int x = 0; x < size.width; ++x) {
/* Work out one vertical `slice' of waveform pixels. Each value in
strip is the number of samples in image with the corresponding group of
values.
*/
int strip[size.height];
for (int i = 0; i < size.height; ++i) {
strip[i] = 0;
}
int* ip = _image->data (_component) + x;
for (int y = 0; y < size.height; ++y) {
strip[*ip * size.height / 4096]++;
ip += size.width;
}
/* Copy slice into the waveform */
uint8_t* wp = _waveform->data()[0] + x * 3;
for (int y = size.height - 1; y >= 0; --y) {
wp[0] = wp[1] = wp[2] = min (255, (strip[y] * 255 / size.height) * _contrast);
wp += _waveform->stride()[0];
}
}
_waveform = _waveform->scale (
dcp::Size (GetSize().GetWidth() - 32, GetSize().GetHeight() - _vertical_margin * 2),
dcp::YUV_TO_RGB_REC709, PIX_FMT_RGB24, false
);
}
static void
note ()
{
}
void
VideoWaveformPlot::set_image (weak_ptr<PlayerVideo> image)
{
if (!_enabled) {
return;
}
shared_ptr<PlayerVideo> pv = image.lock ();
_image = DCPVideo::convert_to_xyz (pv, boost::bind (¬e));
_dirty = true;
Refresh ();
}
void
VideoWaveformPlot::sized (wxSizeEvent &)
{
_dirty = true;
}
void
VideoWaveformPlot::set_enabled (bool e)
{
_enabled = e;
}
void
VideoWaveformPlot::set_component (int c)
{
_component = c;
_dirty = true;
Refresh ();
}
/** Set `contrast', i.e. a fudge multiplication factor to make low-level signals easier to see,
* between 0 and 256.
*/
void
VideoWaveformPlot::set_contrast (int b)
{
_contrast = b;
_dirty = true;
Refresh ();
}
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