From kwintv  Sun Mar 26 16:57:27 2006
From: Dirk Ziegelmeier <dziegel () gmx ! de>
Date: Sun, 26 Mar 2006 16:57:27 +0000
To: kwintv
Subject: Re: [Kwintv] error in make
Message-Id: <200603261857.27820.dziegel () gmx ! de>
X-MARC-Message: https://marc.info/?l=kwintv&m=114339225503233
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On Saturday 25 March 2006 19:13, Kushal Das wrote:
Hello,

this is indeed a compile bug. Please try the attached file.

However, compiling kdetv this way will get you nearly nowhere, since this 
error means you don't have XV acceleration available (or configure didn't 
detect it), so you won't be really able to watch TV anyway. Other display 
methods than XV are not really (fast + good quality) working.

Dirk

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	filename="kxv.cpp"

/* 
 *   KDE Xv interface
 *
 *   Copyright (C) 2001 George Staikos (staikos@kde.org)
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#include <assert.h>

#include <qwindowdefs.h>
#include <qwidget.h>

#include <kdebug.h>

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "kxv.h"


#include <X11/X.h>
#include <X11/Xlib.h>
#include <X11/StringDefs.h>
#include <X11/Xatom.h>
#ifdef HAVE_XSHM
extern "C" {
#include <sys/shm.h>
#include <X11/extensions/XShm.h>
}
#endif

#ifdef HAVE_LIBXV
#include <X11/extensions/Xv.h>
#include <X11/extensions/Xvlib.h>
#endif

#ifdef HAVE_LIBXVMC
#include <X11/extensions/XvMC.h>
#include <X11/extensions/XvMClib.h>
#endif


KXv::KXv()
{
    xv_adaptors = 0;
    _devs.setAutoDelete(true);
}


KXv::~KXv()
{
    kdDebug() << "KXv::~KXv: Close Xv connection." << endl;
    _devs.clear();
    
#ifdef HAVE_LIBXV
    if (xv_adaptors > 0)
        XvFreeAdaptorInfo((XvAdaptorInfo *)xv_adaptor_info);
#endif
}


KXvDeviceList& KXv::devices()
{
  return _devs;
}


bool KXv::haveXv()
{
#ifndef HAVE_LIBXV
    return false;
#else
    unsigned int tmp;
    if (Success != XvQueryExtension(qt_xdisplay(),
                                    &tmp,
                                    &tmp,
                                    &tmp,
                                    &tmp,
                                    &tmp)) 
        return false;
    
    return true;
#endif
}


KXv* KXv::connect(Drawable d)
{
    KXv *xvptr;
    
    xvptr = new KXv;
    if (!xvptr->init(d)) {
        kdDebug() << "KXv::connect: Xv init failed." << endl;
        delete xvptr;
        return NULL;
    }
    
    kdDebug() << "KXv::connect: Xv init completed." << endl;
    return xvptr;
}


bool KXv::init(Drawable d)
{
#ifndef HAVE_LIBXV
    return false;
#else
    if (Success != XvQueryExtension(qt_xdisplay(), 
                                    &xv_version,
                                    &xv_release,
                                    &xv_request,
                                    &xv_event,
                                    &xv_error)) {
        kdWarning() << "KXv::init: Xv extension not available." << endl;
        return false; 
    }
    
#ifdef HAVE_LIBXVMC
    // Causes crashes for some people.
    //  if (Success == XvMCQueryExtension(qt_xdisplay(),0,0)) {
    //    kdDebug() << "Found XvMC!" << endl;
    //  }
#endif
    
    if (Success != XvQueryAdaptors(qt_xdisplay(),
                                   d,
                                   &xv_adaptors, 
                                   (XvAdaptorInfo **)&xv_adaptor_info)) {
        // Note technically fatal... what to do?
        kdWarning() << "KXv::init: XvQueryAdaptors failed." << endl;
    }
    
    XvAdaptorInfo *ai = (XvAdaptorInfo *)xv_adaptor_info;
    
    for (unsigned int i = 0; i < xv_adaptors; i++) {
        KXvDevice *xvd = new KXvDevice;
        xvd->xv_type = ai[i].type;
        xvd->xv_port = ai[i].base_id;
        xvd->xv_name = ai[i].name;
        xvd->xv_adaptor = i;
        xvd->xv_nvisualformats = ai[i].num_formats;
        xvd->xv_visualformats = ai[i].formats;
        if (ai[i].type & XvInputMask &&
            ai[i].type & XvVideoMask ) {
            kdDebug() << "KXv::init: Xv VideoMask port " << ai[i].base_id << " was found." 
                      << "  Device is: " << ai[i].name << "." << endl;
        }
        if (ai[i].type & XvInputMask &&
            ai[i].type & XvImageMask ) {
            kdDebug() << "KXv::init: Xv ImageMask port " << ai[i].base_id << " was found." 
                      << "  Device is: " << ai[i].name << "." << endl;
        }
        
        if (xvd->init()) {
            _devs.append(xvd);
        } else {
            delete xvd;
        }
    }
    
    return true;
#endif
}

bool KXvDevice::grabStill(QImage* /*pix*/, int /*dw*/, int /*dh*/)
{
#ifndef HAVE_LIBXV
    return false;
#else
    return false;
#endif
}

int KXvDevice::displayImage(QWidget *widget, const unsigned char *const data, int w, int h, int dw, int dh)
{
    if (!widget)
        return -1;
    return displayImage(widget->winId(), data, w, h, 0, 0, w, h, dw, dh);
}

int KXvDevice::displayImage(QWidget *widget, const unsigned char *const data, int w, int h, int x, int y, int sw, int sh, int dw, int dh)
{
    if (!widget)
        return -1;
    return displayImage(widget->winId(), data, w, h, x, y, sw, sh, dw, dh);
}

int KXvDevice::displayImage(Window win, const unsigned char *const data, int w, int h, int dw, int dh)
{
    return displayImage(win, data, w, h, 0, 0, w, h, dw, dh);
}

int KXvDevice::displayImage(Window win, const unsigned char *const data, int w, int h, int x, int y, int sw, int sh, int dw, int dh)
{
#ifndef HAVE_LIBXV
    return -1;
#else
    Q_ASSERT(xv_port != -1);
    
    // Must be a video capable device!
    if (!(xv_type & XvImageMask) || !(xv_type & XvInputMask)) {
        kdWarning() << "KXvDevice::displayImage: This is not a video capable device." << endl;
        return -1;
    }
    
    if (xv_image_w != w || xv_image_h != h || !xv_image)
        rebuildImage(w, h, _shm);

    if (!xv_image)
        return -1;
    
    if (win != xv_last_win && xv_gc) {
        XFreeGC(qt_xdisplay(), xv_gc);
        xv_gc = 0;
    }
    
    if (!xv_gc) {
        xv_last_win = win;   
        xv_gc = XCreateGC(qt_xdisplay(), win, 0, NULL);
    }
    
    int rc = 0;
    Q_ASSERT(xv_image);
    if (!_shm) {
        static_cast<XvImage*>(xv_image)->data = 
            (char *)const_cast<unsigned char*>(data);
        rc = XvPutImage(qt_xdisplay(), xv_port, win, xv_gc, 
                        static_cast<XvImage*>(xv_image), x, y, sw, sh, 0, 0, dw, dh);
    } else {
#ifdef HAVE_XSHM
        memcpy(static_cast<XvImage*>(xv_image)->data, data, static_cast<XvImage*>(xv_image)->data_size);
        rc = XvShmPutImage(qt_xdisplay(), xv_port, win, xv_gc, 
                           static_cast<XvImage*>(xv_image), x, y, sw, sh, 0, 0, dw, dh, 0);
#endif
    }

    XSync(qt_xdisplay(), False);
    return rc;
#endif
}


bool KXvDevice::startVideo(QWidget *w, int dw, int dh)
{
    if (!w) return false;
    return startVideo(w->winId(), dw, dh);
}

bool KXvDevice::startVideo(Window w, int dw, int dh)
{
#ifndef HAVE_LIBXV
    return false;
#else
    int sx = 0, sy = 0, dx = 0, dy = 0, sw = dw, sh = dh;
    
    // Must be a video capable device!
    if (!(xv_type & XvVideoMask) || !(xv_type & XvInputMask)) {
        kdWarning() << "KXvDevice::startVideo: This is not a video capable device." << endl;
        return false;
    }
    
    if (videoStarted) stopVideo();
    
    if (xv_port == -1) {
        kdWarning() << "KXvDevice::startVideo: No xv_port." << endl;
        return false;
    }

    if (w != xv_last_win && xv_gc) {
        XFreeGC(qt_xdisplay(), xv_gc);
        xv_gc = 0;
    }
    
    if (!xv_gc) {
        xv_last_win = w;   
        xv_gc = XCreateGC(qt_xdisplay(), w, 0, NULL);
    }
    
    if (-1 != xv_encoding) {
        sw = ((XvEncodingInfo *)xv_encoding_info)[xv_encoding].width;
        sh = ((XvEncodingInfo *)xv_encoding_info)[xv_encoding].height;
    }
    
    // xawtv does this here:
    //  ng_ratio_fixup(&dw, &dh, &dx, &dy);
    
    kdDebug() << "XvPutVideo: " << qt_xdisplay() 
              << " " << xv_port << " " << w << " " << xv_gc 
              << " " << sx << " " << sy << " " << sw << " " << sh 
              << " " << dx << " " << dy << " " << dw << " " << dh << endl;
    XvPutVideo(qt_xdisplay(), xv_port, w, xv_gc, sx, sy, sw, sh, dx, dy, dw, dh);
    
    videoStarted = true;
    videoWindow = w;
    return true;
#endif
}

bool KXvDevice::stopVideo()
{
#ifndef HAVE_LIBXV
    return false;
#else
    if (!videoStarted)
        return true;
    if (xv_port == -1) {
        kdWarning() << "KXvDevice::stopVideo: No xv_port." << endl;
        return false;
    }

    XvStopVideo(qt_xdisplay(), xv_port, videoWindow);
    videoStarted = false;
    return true;
#endif
}


KXvDevice::KXvDevice()
{
    xv_encoding_info = NULL;
    xv_formatvalues = NULL;
    xv_attr = NULL;
    xv_port = -1;
    xv_encoding = -1;
    xv_name = QString::null;
    xv_type = -1;
    xv_adaptor = -1;
    _shm = false;
#ifdef HAVE_LIBXV
    xv_imageformat = 0x32595559;  // FIXME (YUY2)
#ifdef HAVE_XSHM
    if (!XShmQueryExtension(qt_xdisplay())) {
        _haveShm = false;
    } else {
        _shm = true;
        _haveShm = true;
    }
    xv_shminfo = new XShmSegmentInfo;
#else
    xv_shminfo = 0;
#endif
#endif
    xv_gc = 0;
    xv_last_win = 0;
    videoStarted = false;
    _attrs.setAutoDelete(true);
    xv_image = 0;
    xv_image_w = 320;
    xv_image_h = 200;
}


KXvDevice::~KXvDevice()
{
#ifdef HAVE_LIBXV
    _attrs.clear();
    if (videoStarted) stopVideo();
    if (xv_encoding_info)
        XvFreeEncodingInfo((XvEncodingInfo *)xv_encoding_info);
    XFree(xv_formatvalues);
    XFree(xv_attr);
#ifdef HAVE_XSHM
    delete (XShmSegmentInfo*)xv_shminfo;
#endif
    destroyImage();
#endif
    if (xv_gc)
        XFreeGC(qt_xdisplay(), xv_gc);

#ifdef HAVE_LIBXV
    if (xv_port != -1)
        XvUngrabPort(qt_xdisplay(), xv_port, CurrentTime);
#endif
}


bool KXvDevice::init()
{
#ifndef HAVE_LIBXV
    return false;
#else
    assert(xv_port != -1);   // make sure we were prepped by KXv already.

    if (Success != XvGrabPort(qt_xdisplay(), xv_port, CurrentTime)) {
        kdWarning() << "KXvDevice::init(): Unable to grab Xv port." << endl;
        return false;
    }

    if (Success != XvQueryEncodings(qt_xdisplay(),
                                    xv_port,
                                    &xv_encodings,
                                    (XvEncodingInfo **)&xv_encoding_info)) {
        kdWarning() << "KXvDevice::init: Xv QueryEncodings failed.  Dropping Xv support for this device." << endl;
        return false;
    }
    
    // Package the encodings up nicely
    for (unsigned int i = 0; i < xv_encodings; i++) {
        //kdDebug() << "Added encoding: " << ((XvEncodingInfo *)xv_encoding_info)[i].name << endl;
        _encodingList << ((XvEncodingInfo *)xv_encoding_info)[i].name;
    }
    
    xv_attr = XvQueryPortAttributes(qt_xdisplay(), 
                                    xv_port, 
                                    &xv_encoding_attributes);
    XvAttribute *xvattr = (XvAttribute *)xv_attr;
    kdDebug() << "Attributes for port " << xv_port << endl;
    for (int i = 0; i < xv_encoding_attributes; i++) {
        assert(xvattr);
        kdDebug() << "   -> " << xvattr[i].name 
                  << ((xvattr[i].flags & XvGettable) ? " get" : "")
                  << ((xvattr[i].flags & XvSettable) ? " set" : "")
                  << " Range: " << xvattr[i].min_value
                  << " -> " << xvattr[i].max_value << endl;
        
        KXvDeviceAttribute *xvda = new KXvDeviceAttribute;
        xvda->name = xvattr[i].name;
        xvda->min = xvattr[i].min_value;
        xvda->max = xvattr[i].max_value;
        xvda->flags = xvattr[i].flags;
        _attrs.append(xvda);
    }
    
    XvImageFormatValues  *fo;
    fo = XvListImageFormats(qt_xdisplay(), xv_port, &xv_formats);
    xv_formatvalues = (void *)fo;
    kdDebug() << "Image formats for port " << xv_port << endl;
    for (int i = 0; i < xv_formats; i++) {
        assert(fo);
        QString imout;
        imout.sprintf("   0x%x (%c%c%c%c) %s",
                      fo[i].id,
                      fo[i].id        & 0xff,
                      (fo[i].id >>  8) & 0xff,
                      (fo[i].id >> 16) & 0xff,
                      (fo[i].id >> 24) & 0xff,
                      ((fo[i].format == XvPacked) ? 
                       "Packed" : "Planar"));
        kdDebug() << imout << endl;
    }
    
    kdDebug() << "Disabling double buffering." << endl;
    setAttribute("XV_DOUBLE_BUFFER", 0);

    kdDebug() << "Turning on colorkey autopainting." << endl;
    setAttribute("XV_AUTOPAINT_COLORKEY", 1);

    return true;
#endif
}


bool KXvDevice::supportsWidget(QWidget *w)
{
#ifndef HAVE_LIBXV
    return false;
#else
    for (int i = 0; i < xv_nvisualformats; i++) {
        if (static_cast<XvFormat*>(xv_visualformats)[i].visual_id 
            == static_cast<Visual*>(w->x11Visual())->visualid) {
            return true;
        }
    }
    return false;
#endif
}


bool KXvDevice::isVideoSource()
{
#ifndef HAVE_LIBXV
    return false;
#else
    if (xv_type & XvVideoMask && xv_type & XvInputMask) 
        return true;
    return false;
#endif
}


bool KXvDevice::isImageBackend()
{
#ifndef HAVE_LIBXV
    return false;
#else
    if (xv_type & XvImageMask && xv_type & XvInputMask) 
        return true;
    return false;
#endif
}


const KXvDeviceAttributes& KXvDevice::attributes()
{
    return _attrs;
}


bool KXvDevice::getAttributeRange(const QString& attribute, int *min, int *max)
{
    for (KXvDeviceAttribute *at = _attrs.first(); at != NULL; at = _attrs.next()) {
        if (at->name == attribute) {
            if (min) *min = at->min;
            if (max) *max = at->max;
            return true;
        }
    }
    return false;
}


bool KXvDevice::getAttribute(const QString& attribute, int *val)
{
#ifndef HAVE_LIBXV
    return false;
#else
    for (KXvDeviceAttribute *at = _attrs.first(); at != NULL; at = _attrs.next()) {
        if (at->name == attribute) {
            if (val)
                XvGetPortAttribute(qt_xdisplay(), xv_port, at->atom(), val);
            return true;
        }
    }
    return false;
#endif
}


bool KXvDevice::setAttribute(const QString& attribute, int val)
{
#ifndef HAVE_LIBXV
    return false;
#else
    for (KXvDeviceAttribute *at = _attrs.first(); at != NULL; at = _attrs.next()) {
        if (at->name == attribute) {
            XvSetPortAttribute(qt_xdisplay(), xv_port, at->atom(), val);
            XSync(qt_xdisplay(), False);
            return true;
        }
    }
    return false;
#endif
}


const QString& KXvDevice::name() const
{
    return xv_name;
}


int KXvDevice::port() const 
{
    return xv_port;
}

const QStringList& KXvDevice::encodings() const
{
    return _encodingList;
}

bool KXvDevice::encoding(QString& encoding)
{
#ifndef HAVE_LIBXV
    return false;
#else
    XvEncodingID enc;
    
    for (KXvDeviceAttribute *at = _attrs.first(); at != 0L; at = _attrs.next()) {
        if (at->name == "XV_ENCODING") {
            XvGetPortAttribute(qt_xdisplay(), xv_port, at->atom(), (int*)&enc);
            kdDebug() << "KXvDevice: encoding: " << enc << endl;
            encoding = enc;
            return true;
        }
    }
    return false;
#endif
}

bool KXvDevice::setEncoding(const QString& e)
{
#ifdef HAVE_LIBXV
    for (unsigned int i = 0; i < xv_encodings; i++) {
        if (e == ((XvEncodingInfo *)xv_encoding_info)[i].name) {
            xv_encoding = i;
            return setAttribute("XV_ENCODING", 
                                ((XvEncodingInfo *)xv_encoding_info)[i].encoding_id);
        }
    }
#endif
    return false;
}

bool KXvDevice::videoPlaying() const
{
    return videoStarted;
}


bool KXvDevice::useShm(bool on)
{
#ifndef HAVE_XSHM
    if (on) {
        return false;
    }
#endif
    if (!_haveShm) {
        return false;
    }
    if (_shm != on)
        rebuildImage(xv_image_w, xv_image_h, on);
    if (_haveShm) // This can change in rebuildImage()
        _shm = on;
    return _shm;
}


bool KXvDevice::usingShm() const
{
    return _shm;
}


#include <unistd.h>
void KXvDevice::rebuildImage(int w, int h, bool shm)
{
    if (xv_image) {
        destroyImage();
    }
#ifdef HAVE_LIBXV
    if (!shm) {
        xv_image = (void*)XvCreateImage(qt_xdisplay(), xv_port, xv_imageformat, 
                                        0, w, h);
        if (!xv_image) {
            kdWarning() << "KXvDevice::rebuildImage: XvCreateImage failed." << endl;
        }
    } else {
#ifdef HAVE_XSHM
        memset(xv_shminfo, 0, sizeof(XShmSegmentInfo));
        xv_image = (void*)XvShmCreateImage(qt_xdisplay(), xv_port, xv_imageformat, 
                                           0, w, h, static_cast<XShmSegmentInfo*>(xv_shminfo));
        if (!xv_image) {
            kdWarning() << "KXvDevice::rebuildImage: Error using SHM with Xv! Disabling SHM..." << endl;
            _haveShm = false;
            _shm = false;
            xv_image = (void*)XvCreateImage(qt_xdisplay(), xv_port, xv_imageformat,
                                            0, w, h);
            if (!xv_image) {
                kdWarning() << "KXvDevice::rebuildImage: XvCreateImage failed." << endl;
            }
        } else {
            static_cast<XShmSegmentInfo*>(xv_shminfo)->shmid =
                shmget(IPC_PRIVATE,
                       static_cast<XvImage*>(xv_image)->data_size,
                       IPC_CREAT | 0600);
            static_cast<XShmSegmentInfo*>(xv_shminfo)->shmaddr = 
                (char*)shmat(static_cast<XShmSegmentInfo*>(xv_shminfo)->shmid, 0, 0);
            static_cast<XShmSegmentInfo*>(xv_shminfo)->readOnly = True;
            static_cast<XvImage*>(xv_image)->data =
                static_cast<XShmSegmentInfo*>(xv_shminfo)->shmaddr;
            XShmAttach(qt_xdisplay(), static_cast<XShmSegmentInfo*>(xv_shminfo));
            XSync(qt_xdisplay(), False);
            shmctl(static_cast<XShmSegmentInfo*>(xv_shminfo)->shmid, IPC_RMID, 0);
        }
#endif
    }
    Q_ASSERT(xv_image != 0);
    xv_image_w = w;
    xv_image_h = h;
#endif
}


void KXvDevice::destroyImage()
{
#ifdef HAVE_LIBXV
    if (!_shm) {
        if (xv_image) {
            static_cast<XvImage*>(xv_image)->data = 0;
        }
    } else {
        if (xv_image) {
#ifdef HAVE_XSHM
            shmdt(static_cast<XShmSegmentInfo*>(xv_shminfo)->shmaddr);
#endif
        }
    }
    XFree(xv_image);
    xv_image = 0;
#endif
}


Atom KXvDeviceAttribute::atom()
{
    return XInternAtom(qt_xdisplay(), name.latin1(), False);
}

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