1 files changed, 599 insertions, 0 deletions

diff --git a/noncore/multimedia/camera2/videocaptureview.cpp b/noncore/multimedia/camera2/videocaptureview.cpp
new file mode 100644
index 0000000..410634a
--- a/dev/null
+++ b/noncore/multimedia/camera2/videocaptureview.cpp
@@ -0,0 +1,599 @@
+/**********************************************************************
+** Copyright (C) 2000-2006 Trolltech AS.  All rights reserved.
+**
+** This file is part of the Qtopia Environment.
+**
+** 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.
+**
+** A copy of the GNU GPL license version 2 is included in this package as
+** LICENSE.GPL.
+**
+** 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.
+**
+** In addition, as a special exception Trolltech gives permission to link
+** the code of this program with Qtopia applications copyrighted, developed
+** and distributed by Trolltech under the terms of the Qtopia Personal Use
+** License Agreement. You must comply with the GNU General Public License
+** in all respects for all of the code used other than the applications
+** licensed under the Qtopia Personal Use License Agreement. If you modify
+** this file, you may extend this exception to your version of the file,
+** but you are not obligated to do so. If you do not wish to do so, delete
+** this exception statement from your version.
+**
+** See http://www.trolltech.com/gpl/ for GPL licensing information.
+**
+** Contact info@trolltech.com if any conditions of this licensing are
+** not clear to you.
+**
+**********************************************************************/
+
+#include "videocaptureview.h"
+#include <qimage.h>
+#include <qpainter.h>
+#ifdef Q_WS_QWS
+#include <qgfx_qws.h>
+#include <qdirectpainter_qws.h>
+#endif
+
+#ifdef __linux__
+        #defineHAVE_VIDEO4LINUX 1
+#endif
+
+#ifdef HAVE_VIDEO4LINUX
+
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <linux/videodev.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+#include <sys/mman.h>
+
+#endif /* HAVE_VIDEO4LINUX */
+
+class VideoCapture {
+  public:
+    VideoCapture();
+    ~VideoCapture();
+
+    bool hasCamera() const;
+    void getCameraImage(QImage & img, bool copy = FALSE);
+
+      QValueList < QSize > photoSizes() const;
+      QValueList < QSize > videoSizes() const;
+
+    QSize recommendedPhotoSize() const;
+    QSize recommendedVideoSize() const;
+    QSize recommendedPreviewSize() const;
+
+    QSize captureSize() const;
+    void setCaptureSize(QSize size);
+
+    uint refocusDelay() const;
+    int minimumFramePeriod() const;
+
+  private:
+#ifdef HAVE_VIDEO4LINUX
+    int fd;
+    int width, height;
+    struct video_capability caps;
+    struct video_mbuf mbuf;
+    unsigned char *frames;
+    int currentFrame;
+
+    void setupCamera(QSize size);
+    void shutdown();
+#endif
+};
+
+#ifdef HAVE_VIDEO4LINUX
+
+        #define         VIDEO_DEVICE    "/dev/video"
+
+bool VideoCapture::hasCamera() const 
+{
+    return (fd != -1);
+}
+
+QSize VideoCapture::captureSize() const
+{
+    return QSize(width, height);
+}
+
+uint VideoCapture::refocusDelay() const 
+{
+    return 250;
+}
+
+int VideoCapture::minimumFramePeriod() const 
+{
+    return 40;                  // milliseconds
+}
+
+VideoCapture::VideoCapture()
+{
+    setupCamera(QSize(0, 0));
+}
+
+VideoCapture::~VideoCapture()
+{
+    shutdown();
+}
+
+void VideoCapture::setupCamera(QSize size)
+{
+    qWarning(" VideoCapture::setupCamera");
+    // Clear important variables.
+    frames = 0;
+    currentFrame = 0;
+    width = 640;
+    height = 480;
+    caps.minwidth = width;
+    caps.minheight = height;
+    caps.maxwidth = width;
+    caps.maxheight = height;
+
+    // Open the video device.
+    fd = open(VIDEO_DEVICE, O_RDWR);
+    if (fd == -1) {
+        qWarning("%s: %s", VIDEO_DEVICE, strerror(errno));
+        return;
+    }
+
+    // Get the device's current capabilities.
+    memset(&caps, 0, sizeof(caps));
+    if (ioctl(fd, VIDIOCGCAP, &caps) < 0) {
+        qWarning("%s: could not retrieve the video capabilities", VIDEO_DEVICE);
+        close(fd);
+        fd = -1;
+        return;
+    }
+
+    // Change the channel to the first-connected camera, skipping TV inputs.
+    // If there are multiple cameras, this may need to be modified.
+    int chan;
+    struct video_channel chanInfo;
+    qWarning("available video capture inputs:");
+    for (chan = 0; chan < caps.channels; ++chan) {
+        chanInfo.channel = chan;
+        if (ioctl(fd, VIDIOCGCHAN, &chanInfo) >= 0) {
+            if (chanInfo.type == VIDEO_TYPE_CAMERA)
+                qWarning("    %s (camera)", chanInfo.name);
+            else if (chanInfo.type == VIDEO_TYPE_TV)
+                qWarning("    %s (tv)", chanInfo.name);
+            else
+                qWarning("    %s (unknown)", chanInfo.name);
+        }
+    }
+    for (chan = 0; chan < caps.channels; ++chan) {
+        chanInfo.channel = chan;
+        if (ioctl(fd, VIDIOCGCHAN, &chanInfo) >= 0) {
+            if (chanInfo.type == VIDEO_TYPE_CAMERA) {
+                qWarning("selecting camera on input %s", chanInfo.name);
+                if (ioctl(fd, VIDIOCSCHAN, &chan) < 0) {
+                    qWarning("%s: could not set the channel", VIDEO_DEVICE);
+                }
+                break;
+            }
+        }
+    }
+
+    // Set the desired picture mode to RGB32.
+    struct video_picture pict;
+    memset(&pict, 0, sizeof(pict));
+    ioctl(fd, VIDIOCGPICT, &pict);
+    pict.palette = VIDEO_PALETTE_RGB32;
+    if (ioctl(fd, VIDIOCSPICT, &pict) < 0) {
+        qWarning("%s: could not set the picture mode", VIDEO_DEVICE);
+        close(fd);
+        fd = -1;
+        return;
+    }
+
+    // Determine the capture size to use.  Zero indicates "preview mode".
+    if (size.width() == 0) {
+        size = QSize(caps.minwidth, caps.minheight);
+    }
+
+    // Get the current capture window.
+    struct video_window wind;
+    memset(&wind, 0, sizeof(wind));
+    ioctl(fd, VIDIOCGWIN, &wind);
+
+    // Adjust the capture size to match the camera's aspect ratio.
+    if (caps.maxwidth > 0 && caps.maxheight > 0) {
+        if (size.width() > size.height()) {
+            size = QSize(size.height() * caps.maxwidth / caps.maxheight, size.height());
+        }
+        else {
+            size = QSize(size.width(), size.width() * caps.maxheight / caps.maxwidth);
+        }
+    }
+
+    // Set the new capture window.
+    wind.x = 0;
+    wind.y = 0;
+    wind.width = size.width();
+    wind.height = size.height();
+    if (ioctl(fd, VIDIOCSWIN, &wind) < 0) {
+        qWarning("%s: could not set the capture window", VIDEO_DEVICE);
+    }
+
+    // Re-read the capture window, to see what it was adjusted to.
+    ioctl(fd, VIDIOCGWIN, &wind);
+    width = wind.width;
+    height = wind.height;
+
+    // Enable mmap-based access to the camera.
+    memset(&mbuf, 0, sizeof(mbuf));
+    if (ioctl(fd, VIDIOCGMBUF, &mbuf) < 0) {
+        qWarning("%s: mmap-based camera access is not available", VIDEO_DEVICE);
+        close(fd);
+        fd = -1;
+        return;
+    }
+
+    // Mmap the designated memory region.
+    frames = (unsigned char *) mmap(0, mbuf.size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+    if (!frames || frames == (unsigned char *) (long) (-1)) {
+        qWarning("%s: could not mmap the device", VIDEO_DEVICE);
+        close(fd);
+        fd = -1;
+        return;
+    }
+
+    // Start capturing of the first frame.
+    struct video_mmap capture;
+    currentFrame = 0;
+    capture.frame = currentFrame;
+    capture.width = width;
+    capture.height = height;
+    capture.format = VIDEO_PALETTE_RGB32;
+    ioctl(fd, VIDIOCMCAPTURE, &capture);
+}
+
+void VideoCapture::shutdown()
+{
+    if (frames != 0) {
+        munmap(frames, mbuf.size);
+        frames = 0;
+    }
+    if (fd != -1) {
+        int flag = 0;
+        ioctl(fd, VIDIOCSYNC, 0);
+        ioctl(fd, VIDIOCCAPTURE, &flag);
+        close(fd);
+        fd = -1;
+    }
+}
+
+void VideoCapture::getCameraImage(QImage & img, bool copy)
+{
+    if (fd == -1) {
+        if (img.isNull()) {
+            img.create(width, height, 32);
+        }
+        return;
+    }
+
+    // Start capturing the next frame (we alternate between 0 and 1).
+    int frame = currentFrame;
+    struct video_mmap capture;
+    if (mbuf.frames > 1) {
+        currentFrame = !currentFrame;
+        capture.frame = currentFrame;
+        capture.width = width;
+        capture.height = height;
+        capture.format = VIDEO_PALETTE_RGB32;
+        ioctl(fd, VIDIOCMCAPTURE, &capture);
+    }
+
+    // Wait for the current frame to complete.
+    ioctl(fd, VIDIOCSYNC, &frame);
+
+    // Create an image that refers directly to the kernel's
+    // frame buffer, to avoid having to copy the data.
+    if (!copy) {
+        img = QImage(frames + mbuf.offsets[frame], width, height, 32, 0, 0, QImage::IgnoreEndian);
+    }
+    else {
+        img.create(width, height, 32);
+        memcpy(img.bits(), frames + mbuf.offsets[frame], width * height * 4);
+    }
+
+    // Queue up another frame if the device only supports one at a time.
+    if (mbuf.frames <= 1) {
+        capture.frame = currentFrame;
+        capture.width = width;
+        capture.height = height;
+        capture.format = VIDEO_PALETTE_RGB32;
+        ioctl(fd, VIDIOCMCAPTURE, &capture);
+    }
+}
+
+QValueList < QSize > VideoCapture::photoSizes() const
+{
+    QValueList < QSize > list;
+    list.append(QSize(caps.maxwidth, caps.maxheight));
+    if (caps.maxwidth != caps.minwidth || caps.maxheight != caps.minheight)
+        list.append(QSize(caps.minwidth, caps.minheight));
+    return list;
+}
+
+QValueList < QSize > VideoCapture::videoSizes() const
+{
+    // We use the same sizes for both.
+    return photoSizes();
+}
+
+QSize VideoCapture::recommendedPhotoSize() const
+{
+    return QSize(caps.maxwidth, caps.maxheight);
+}
+
+QSize VideoCapture::recommendedVideoSize() const
+{
+    return QSize(caps.minwidth, caps.minheight);
+}
+
+QSize VideoCapture::recommendedPreviewSize() const
+{
+    return QSize(caps.minwidth, caps.minheight);
+}
+
+void VideoCapture::setCaptureSize(QSize size)
+{
+    if (size.width() != width || size.height() != height) {
+        shutdown();
+        setupCamera(size);
+    }
+}
+
+#else /* !HAVE_VIDEO4LINUX */
+
+// Dummy implementation for systems without video.
+
+VideoCapture::VideoCapture()
+{
+}
+
+VideoCapture::~VideoCapture()
+{
+}
+
+bool VideoCapture::hasCamera() const 
+{
+    return TRUE;
+}
+
+QSize VideoCapture::captureSize() const 
+{
+    return QSize(640, 480);
+}
+
+uint VideoCapture::refocusDelay() const 
+{
+    return 0;
+}
+
+int VideoCapture::minimumFramePeriod() const 
+{
+    return 100;
+}
+
+static unsigned int nextrand()
+{
+#define A 16807
+#define M 2147483647
+#define Q 127773
+#define R 2836
+    static unsigned int rnd = 1;
+    unsigned long hi = rnd / Q;
+    unsigned long lo = rnd % Q;
+    unsigned long test = A * lo - R * hi;
+    if (test > 0)
+        rnd = test;
+    else
+        rnd = test + M;
+    return rnd;
+}
+
+void VideoCapture::getCameraImage(QImage & img, bool)
+{
+    // Just generate something dynamic (rectangles)
+    static QImage cimg;
+    int x, y, w, h;
+    if (cimg.isNull()) {
+        x = y = 0;
+        w = 640;
+        h = 480;
+        cimg.create(w, h, 32);
+    }
+    else {
+        w = nextrand() % (cimg.width() - 10) + 10;
+        h = nextrand() % (cimg.height() - 10) + 10;
+        x = nextrand() % (cimg.width() - w);
+        y = nextrand() % (cimg.height() - h);
+    }
+    QRgb c = qRgb(nextrand() % 255, nextrand() % 255, nextrand() % 255);
+    for (int j = 0; j < h; j++) {
+        QRgb *l = (QRgb *) cimg.scanLine(y + j) + x;
+        for (int i = 0; i < w; i++)
+            l[i] = c;
+    }
+    img = cimg;
+}
+
+QValueList < QSize > VideoCapture::photoSizes() constconst
+{
+    QValueList < QSize > list;
+    list.append(QSize(640, 480));
+    list.append(QSize(320, 240));
+    return list;
+}
+
+QValueList < QSize > VideoCapture::videoSizes() constconst
+{
+    QValueList < QSize > list;
+    list.append(QSize(640, 480));
+    list.append(QSize(320, 240));
+    return list;
+}
+
+QSize VideoCapture::recommendedPhotoSize() const 
+{
+    return QSize(640, 480);
+}
+
+QSize VideoCapture::recommendedVideoSize() const 
+{
+    return QSize(320, 240);
+}
+
+QSize VideoCapture::recommendedPreviewSize() const 
+{
+    return QSize(320, 240);
+}
+
+void VideoCapture::setCaptureSize(QSize size)
+{
+}
+
+#endif /* !HAVE_VIDEO4LINUX */
+
+VideoCaptureView::VideoCaptureView(QWidget * parent, const char *name, WFlags fl):QWidget(parent,
+                                                                                          name, fl)
+{
+    capture = new VideoCapture();
+    QSizePolicy sp(QSizePolicy::Expanding, QSizePolicy::Expanding);
+    setSizePolicy(sp);
+    tid_update = 0;
+    setLive();
+}
+
+VideoCaptureView::~VideoCaptureView()
+{
+    delete capture;
+}
+
+void VideoCaptureView::setLive(int period)
+{
+    if (tid_update)
+        killTimer(tid_update);
+    if (period == 0)
+        tid_update = startTimer(capture->minimumFramePeriod());
+    else if (period > 0)
+        tid_update = startTimer(period);
+    else
+        tid_update = 0;
+}
+
+void VideoCaptureView::setStill(const QImage & i)
+{
+    setLive(-1);
+    img = i;
+    repaint(TRUE);
+}
+
+QValueList < QSize > VideoCaptureView::photoSizes() const
+{
+    return capture->photoSizes();
+}
+
+QValueList < QSize > VideoCaptureView::videoSizes() const
+{
+    return capture->videoSizes();
+}
+
+QSize VideoCaptureView::recommendedPhotoSize() const 
+{
+    return capture->recommendedPhotoSize();
+}
+
+QSize VideoCaptureView::recommendedVideoSize() const 
+{
+    return capture->recommendedVideoSize();
+}
+
+QSize VideoCaptureView::recommendedPreviewSize() const 
+{
+    return capture->recommendedPreviewSize();
+}
+
+QSize VideoCaptureView::captureSize() const 
+{
+    return capture->captureSize();
+}
+
+void VideoCaptureView::setCaptureSize(QSize size)
+{
+    capture->setCaptureSize(size);
+}
+
+uint VideoCaptureView::refocusDelay() const 
+{
+    return capture->refocusDelay();
+}
+
+bool VideoCaptureView::available() const 
+{
+    return capture->hasCamera();
+}
+
+void VideoCaptureView::paintEvent(QPaintEvent *)
+{
+    if (tid_update && !capture->hasCamera()) {
+        QPainter p(this);
+        p.drawText(rect(), AlignCenter, tr("No Camera"));
+        return;
+    }
+
+    if (tid_update)
+        capture->getCameraImage(img);
+    int w = img.width();
+    int h = img.height();
+
+    if (!w || !h)
+        return;
+
+    if (width() * w > height() * h) {
+        w = w * height() / h;
+        h = height();
+    }
+    else {
+        h = h * width() / w;
+        w = width();
+    }
+
+    if (qt_screen->transformOrientation() == 0) {
+        // Stretch and draw the image.
+        QDirectPainter p(this);
+        QGfx *gfx = p.internalGfx();
+        if (gfx) {
+            gfx->setSource(&img);
+            gfx->setAlphaType(QGfx::IgnoreAlpha);
+            gfx->stretchBlt((width() - w) / 2, (height() - h) / 2, w, h, img.width(), img.height());
+        }
+    }
+    else {
+        // This code is nowhere near efficient enough (hence the above).
+        // TODO - handle rotations during direct painting.
+        QImage scimg = img.smoothScale(w, h);
+        QPainter p(this);
+        p.drawImage((width() - w) / 2, (height() - h) / 2, scimg);
+    }
+}
+
+void VideoCaptureView::timerEvent(QTimerEvent *)
+{
+    repaint(FALSE);
+}
+