Initial copy of QtMultimediaKit.
Comes from original repo, with SHA1: 2c82d5611655e5967f5c5095af50c0991c4378b2
This commit is contained in:
Michael Goddard
297
src/plugins/gstreamer/mediacapture/qgstreamerv4l2input.cpp
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297
src/plugins/gstreamer/mediacapture/qgstreamerv4l2input.cpp
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/****************************************************************************
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**
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the Qt Mobility Components.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "qgstreamerv4l2input.h"
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#include <QtCore/qdebug.h>
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#include <QtCore/qfile.h>
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#include <linux/types.h>
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#include <sys/time.h>
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#include <sys/ioctl.h>
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#include <sys/poll.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <string.h>
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#include <stdlib.h>
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#include <sys/mman.h>
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#include <linux/videodev2.h>
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QT_BEGIN_NAMESPACE
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static inline uint qHash(const QSize& key) { return uint(key.width()*256+key.height()); }
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static bool operator<(const QSize &s1, const QSize s2)
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{
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return s1.width()*s1.height() < s2.width()*s2.height();
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}
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QT_END_NAMESPACE
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QGstreamerV4L2Input::QGstreamerV4L2Input(QObject *parent)
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:QObject(parent)
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{
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}
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QGstreamerV4L2Input::~QGstreamerV4L2Input()
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{
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}
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GstElement *QGstreamerV4L2Input::buildElement()
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{
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#ifndef Q_WS_MAEMO_5
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GstElement *camera = gst_element_factory_make("v4l2src", "camera_source");
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#else
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GstElement *camera = gst_element_factory_make("v4l2camsrc", "camera_source");
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#endif
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if (camera && !m_device.isEmpty() )
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g_object_set(G_OBJECT(camera), "device", m_device.constData(), NULL);
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return camera;
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}
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void QGstreamerV4L2Input::setDevice(const QByteArray &newDevice)
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{
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if (m_device != newDevice) {
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m_device = newDevice;
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updateSupportedResolutions(newDevice);
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}
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}
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void QGstreamerV4L2Input::setDevice(const QString &device)
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{
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setDevice(QFile::encodeName(device));
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}
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void QGstreamerV4L2Input::updateSupportedResolutions(const QByteArray &device)
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{
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m_frameRates.clear();
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m_resolutions.clear();
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m_ratesByResolution.clear();
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QSet<QSize> allResolutions;
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QSet<int> allFrameRates;
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QFile f(device);
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if (!f.open(QFile::ReadOnly))
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return;
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int fd = f.handle();
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//get the list of formats:
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QList<quint32> supportedFormats;
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{
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v4l2_fmtdesc fmt;
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memset(&fmt, 0, sizeof(v4l2_fmtdesc));
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fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
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int sanity = 0;
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for (fmt.index = 0;; fmt.index++) {
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if (sanity++ > 8)
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break;
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if( ::ioctl(fd, VIDIOC_ENUM_FMT, &fmt) == -1) {
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if(errno == EINVAL)
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break;
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}
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supportedFormats.append(fmt.pixelformat);
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}
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}
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QList<QSize> commonSizes;
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commonSizes << QSize(128, 96)
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<<QSize(160,120)
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<<QSize(176, 144)
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<<QSize(320, 240)
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<<QSize(352, 288)
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<<QSize(640, 480)
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<<QSize(1024, 768)
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<<QSize(1280, 1024)
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<<QSize(1600, 1200)
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<<QSize(1920, 1200)
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<<QSize(2048, 1536)
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<<QSize(2560, 1600)
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<<QSize(2580, 1936);
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QList<int> commonRates;
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commonRates << 05*1000 << 75*1000 << 10*1000 << 15*1000 << 20*1000
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<< 24*1000 << 25*1000 << 30*1000 << 50*1000 << 60*1000;
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//get the list of resolutions:
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foreach (quint32 format, supportedFormats) {
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struct v4l2_frmsizeenum formatSize;
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memset(&formatSize, 0, sizeof(formatSize));
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formatSize.pixel_format = format;
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QList<QSize> sizeList;
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if (0) {
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char formatStr[5];
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memcpy(formatStr, &format, 4);
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formatStr[4] = 0;
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//qDebug() << "trying format" << formatStr;
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}
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for (int i=0;;i++) {
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formatSize.index = i;
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if (ioctl (fd, VIDIOC_ENUM_FRAMESIZES, &formatSize) < 0)
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break;
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if (formatSize.type == V4L2_FRMSIZE_TYPE_DISCRETE) {
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sizeList.append(QSize(formatSize.discrete.width, formatSize.discrete.height));
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} else {
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foreach (const QSize& candidate, commonSizes) {
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if (candidate.width() <= (int)formatSize.stepwise.max_width &&
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candidate.height() >= (int)formatSize.stepwise.min_width &&
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candidate.width() % formatSize.stepwise.step_width == 0 &&
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candidate.height() <= (int)formatSize.stepwise.max_height &&
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candidate.height() >= (int)formatSize.stepwise.min_height &&
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candidate.height() % formatSize.stepwise.step_height == 0) {
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sizeList.append(candidate);
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}
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}
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if (!sizeList.contains(QSize(formatSize.stepwise.min_width, formatSize.stepwise.min_height)))
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sizeList.prepend(QSize(formatSize.stepwise.min_width, formatSize.stepwise.min_height));
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if (!sizeList.contains(QSize(formatSize.stepwise.max_width, formatSize.stepwise.max_height)))
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sizeList.append(QSize(formatSize.stepwise.max_width, formatSize.stepwise.max_height));
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break; //stepwise values are returned only for index 0
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}
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}
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//and frameRates for each resolution.
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foreach (const QSize &s, sizeList) {
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allResolutions.insert(s);
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struct v4l2_frmivalenum formatInterval;
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memset(&formatInterval, 0, sizeof(formatInterval));
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formatInterval.pixel_format = format;
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formatInterval.width = s.width();
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formatInterval.height = s.height();
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QList<int> frameRates; //in 1/1000 of fps
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for (int i=0; ; i++) {
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formatInterval.index = i;
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if (ioctl(fd, VIDIOC_ENUM_FRAMEINTERVALS, &formatInterval) < 0)
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break;
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if (formatInterval.type == V4L2_FRMIVAL_TYPE_DISCRETE) {
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//converts seconds to fps*1000
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if (formatInterval.discrete.numerator)
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frameRates.append(qRound(formatInterval.discrete.denominator*1000.0 / formatInterval.discrete.numerator));
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} else {
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if (formatInterval.stepwise.min.numerator == 0 ||
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formatInterval.stepwise.max.numerator == 0) {
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qWarning() << "received invalid frame interval";
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break;
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}
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int minRate = qRound(formatInterval.stepwise.min.denominator*1000.0 /
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formatInterval.stepwise.min.numerator);
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int maxRate = qRound(formatInterval.stepwise.max.denominator*1000.0 /
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formatInterval.stepwise.max.numerator);
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foreach (int candidate, commonRates) {
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if (candidate >= minRate && candidate <= maxRate)
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frameRates.append(candidate);
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}
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if (!frameRates.contains(minRate))
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frameRates.prepend(minRate);
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if (!frameRates.contains(maxRate))
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frameRates.append(maxRate);
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break; //stepwise values are returned only for index 0
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}
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}
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allFrameRates.unite(frameRates.toSet());
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m_ratesByResolution[s].unite(frameRates.toSet());
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}
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}
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f.close();
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foreach(int rate, allFrameRates) {
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m_frameRates.append(rate/1000.0);
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}
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qSort(m_frameRates);
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m_resolutions = allResolutions.toList();
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qSort(m_resolutions);
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//qDebug() << "frame rates:" << m_frameRates;
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//qDebug() << "resolutions:" << m_resolutions;
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}
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QList<qreal> QGstreamerV4L2Input::supportedFrameRates(const QSize &frameSize) const
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{
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if (frameSize.isEmpty())
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return m_frameRates;
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else {
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QList<qreal> res;
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foreach(int rate, m_ratesByResolution[frameSize]) {
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res.append(rate/1000.0);
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}
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return res;
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}
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}
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QList<QSize> QGstreamerV4L2Input::supportedResolutions(qreal frameRate) const
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{
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Q_UNUSED(frameRate);
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return m_resolutions;
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}
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