diff options
author | Lev Zelenskiy <lev.zelenskiy@nokia.com> | 2012-02-21 17:23:47 +1000 |
---|---|---|
committer | Qt by Nokia <qt-info@nokia.com> | 2012-02-24 06:51:30 +0100 |
commit | 03a14a95fe731259aeb104c3ea4ca42ae8b10a09 (patch) | |
tree | f52f820f7beecf5642d7e0826fec6c11acd3f561 /examples/player | |
parent | b56d3e70df4a5bf25a1be97213b5dc36bc5e6dbd (diff) |
Video player example updated to display histogram using QVideoProbe.
Change-Id: Iaeba751280133bd405fe90a0d5d07be446c95738
Reviewed-by: Michael Goddard <michael.goddard@nokia.com>
Diffstat (limited to 'examples/player')
-rw-r--r-- | examples/player/histogramwidget.cpp | 127 | ||||
-rw-r--r-- | examples/player/histogramwidget.h | 67 | ||||
-rw-r--r-- | examples/player/player.cpp | 15 | ||||
-rw-r--r-- | examples/player/player.h | 7 | ||||
-rw-r--r-- | examples/player/player.pro | 6 |
5 files changed, 219 insertions, 3 deletions
diff --git a/examples/player/histogramwidget.cpp b/examples/player/histogramwidget.cpp new file mode 100644 index 000000000..cf7ae6fff --- /dev/null +++ b/examples/player/histogramwidget.cpp @@ -0,0 +1,127 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/ +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "histogramwidget.h" +#include <QPainter> + +HistogramWidget::HistogramWidget(QWidget *parent) + : QWidget(parent) + , m_levels(128) +{ +} + +void HistogramWidget::processFrame(QVideoFrame frame) +{ + m_histogram.clear(); + + do { + if (!m_levels) + break; + + if (!frame.map(QAbstractVideoBuffer::ReadOnly)) + break; + + m_histogram.resize(m_levels); + + if (frame.pixelFormat() == QVideoFrame::Format_YUV420P) { + // Process YUV420P data + uchar *b = frame.bits(); + for (int y = 0; y < frame.height(); y++) { + uchar *lastPixel = b + frame.width(); + for (uchar *curPixel = b; curPixel < lastPixel; curPixel++) + m_histogram[(*curPixel * m_levels) / 256] += 1.0; + b += frame.bytesPerLine(); + } + } else { + QImage::Format imageFormat = QVideoFrame::imageFormatFromPixelFormat(frame.pixelFormat()); + if (imageFormat != QImage::Format_Invalid) { + // Process RGB data + QImage image(frame.bits(), frame.width(), frame.height(), imageFormat); + image = image.convertToFormat(QImage::Format_RGB32); + + const QRgb* b = (const QRgb*)image.bits(); + for (int y = 0; y < image.height(); y++) { + const QRgb *lastPixel = b + frame.width(); + for (const QRgb *curPixel = b; curPixel < lastPixel; curPixel++) + m_histogram[(qGray(*curPixel) * m_levels) / 256] += 1.0; + b = (const QRgb*)((uchar*)b + image.bytesPerLine()); + } + } + } + + // find maximum value + qreal maxValue = 0.0; + for (int i = 0; i < m_histogram.size(); i++) { + if (m_histogram[i] > maxValue) + maxValue = m_histogram[i]; + } + + if (maxValue > 0.0) { + for (int i = 0; i < m_histogram.size(); i++) + m_histogram[i] /= maxValue; + } + + frame.unmap(); + } while (false); + + update(); +} + +void HistogramWidget::paintEvent(QPaintEvent *event) +{ + Q_UNUSED(event); + + QPainter painter(this); + + if (m_histogram.isEmpty()) { + painter.fillRect(0, 0, width(), height(), QColor::fromRgb(0, 0, 0)); + return; + } + + qreal barWidth = width() / (qreal)m_histogram.size(); + + for (int i = 0; i < m_histogram.size(); i++) { + qreal h = m_histogram[i] * height(); + // draw level + painter.fillRect(barWidth * i, height() - h, barWidth * (i + 1), height(), Qt::red); + // clear the rest of the control + painter.fillRect(barWidth * i, 0, barWidth * (i + 1), height() - h, Qt::black); + } +} diff --git a/examples/player/histogramwidget.h b/examples/player/histogramwidget.h new file mode 100644 index 000000000..2d1883fff --- /dev/null +++ b/examples/player/histogramwidget.h @@ -0,0 +1,67 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/ +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef HISTOGRAMWIDGET_H +#define HISTOGRAMWIDGET_H + +#include <QWidget> +#include <qvideoframe.h> + +QT_USE_NAMESPACE + +class HistogramWidget : public QWidget +{ + Q_OBJECT +public: + explicit HistogramWidget(QWidget *parent = 0); + void setLevels(int levels) { m_levels = levels; } + +public slots: + void processFrame(QVideoFrame frame); + +protected: + void paintEvent(QPaintEvent *event); + +private: + QVector<qreal> m_histogram; + int m_levels; +}; + +#endif // HISTOGRAMWIDGET_H diff --git a/examples/player/player.cpp b/examples/player/player.cpp index 187312b24..8934cab2e 100644 --- a/examples/player/player.cpp +++ b/examples/player/player.cpp @@ -42,9 +42,11 @@ #include "playercontrols.h" #include "playlistmodel.h" +#include "histogramwidget.h" #include <qmediaservice.h> #include <qmediaplaylist.h> +#include <qvideoprobe.h> #include <QtWidgets> @@ -95,6 +97,16 @@ Player::Player(QWidget *parent) labelDuration = new QLabel(this); connect(slider, SIGNAL(sliderMoved(int)), this, SLOT(seek(int))); + labelHistogram = new QLabel(this); + labelHistogram->setText("Histogram:"); + histogram = new HistogramWidget(this); + QHBoxLayout *histogramLayout = new QHBoxLayout; + histogramLayout->addWidget(labelHistogram); + histogramLayout->addWidget(histogram, 1); + + probe = new QVideoProbe(this); + connect(probe, SIGNAL(videoFrameProbed(const QVideoFrame&)), histogram, SLOT(processFrame(QVideoFrame))); + probe->setSource(player); QPushButton *openButton = new QPushButton(tr("Open"), this); @@ -152,6 +164,7 @@ Player::Player(QWidget *parent) hLayout->addWidget(labelDuration); layout->addLayout(hLayout); layout->addLayout(controlLayout); + layout->addLayout(histogramLayout); setLayout(layout); @@ -368,7 +381,6 @@ void Player::updateDurationInfo(qint64 currentInfo) labelDuration->setText(tStr); } - #ifndef PLAYER_NO_COLOROPTIONS void Player::showColorDialog() { @@ -415,3 +427,4 @@ void Player::showColorDialog() colorDialog->show(); } #endif + diff --git a/examples/player/player.h b/examples/player/player.h index a317bfcb4..924d4e23a 100644 --- a/examples/player/player.h +++ b/examples/player/player.h @@ -54,6 +54,7 @@ class QLabel; class QModelIndex; class QSlider; class QPushButton; +class QVideoProbe; class QMediaPlayer; class QVideoWidget; @@ -62,6 +63,7 @@ QT_END_NAMESPACE QT_USE_NAMESPACE class PlaylistModel; +class HistogramWidget; class Player : public QWidget { @@ -113,6 +115,11 @@ private: QPushButton *colorButton; QDialog *colorDialog; #endif + + QLabel *labelHistogram; + HistogramWidget *histogram; + QVideoProbe *probe; + PlaylistModel *playlistModel; QAbstractItemView *playlistView; QString trackInfo; diff --git a/examples/player/player.pro b/examples/player/player.pro index 3bc6c654d..52594187e 100644 --- a/examples/player/player.pro +++ b/examples/player/player.pro @@ -12,12 +12,14 @@ HEADERS = \ player.h \ playercontrols.h \ playlistmodel.h \ - videowidget.h + videowidget.h \ + histogramwidget.h SOURCES = main.cpp \ player.cpp \ playercontrols.cpp \ playlistmodel.cpp \ - videowidget.cpp + videowidget.cpp \ + histogramwidget.cpp maemo* { DEFINES += PLAYER_NO_COLOROPTIONS |