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12 Feb 2007

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QLabelRenderer.cpp

 /***********************************************************************
 *                                                                      *
 * ViTooKi                                                              *
 *                                                                      *
 * title:    QLabelRenderer.cpp                                         *
 *                                                                      *
 *                                                                      *
 *                                                                      *
 * ITEC institute of the University of Klagenfurt (Austria)             *
 * http://www.itec.uni-klu.ac.at                                        *
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 * vitooki-devel@lists.sourceforge.net                                  *
 *                                                                      *
 * This file is part of ViTooKi, a free video toolkit.                  *
 * ViTooKi is free software; you can redistribute it and/or             *
 * modify it under the terms of the GNU General Public License          *
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 * MA  02111-1307, USA.                                                 *
 *                                                                      *
 ***********************************************************************/

 /***********************************************************************
 *                                                                      *
 *  REVISION HISTORY:                                                   *
 *                                                                      *
 *  $Id: QLabelRenderer.cpp,v 1.17 2006/01/20 15:37:18 mkropfbe Exp $
 *                                                                      *
 ***********************************************************************/

#include <qapplication.h>
#include <qevent.h>
#include <qimage.h>
#include <qlabel.h>
#include <qpixmap.h>
#include "global.hpp"
#include "IO.hpp"
#include "Frame.hpp"
#include "QLabelRenderer.hpp"
#include "VideoRenderer.hpp"


QLabelRenderer::QLabelRenderer(const VideoESInfo *_es, UncompressedVideoFrame::ColorSpace colorSpace,
                                                                                                                         QLabel *qlabel, bool allowUpscaleX, QEvent::Type eventType)
        : VideoRenderer(_es, colorSpace, qlabel->width(), qlabel->height(), false, true, allowUpscaleX)
{
        dprintf_full("QLabelRenderer Construct %s ES %p\n",this->url, this->es);
  this->qlabel = qlabel;
  if (!qlabel->pixmap()) {
    QPixmap pixmap(qlabel->width(), qlabel->height());
    pixmap.fill(Qt::black);
    qlabel->setPixmap(pixmap);
  }
  qlabel->pixmap()->setOptimization(QPixmap::BestOptim);
  this->eventType = eventType;
        strcpy(this->url,"QLabelRenderer");
}

QLabelRenderer::~QLabelRenderer()
{
}

bool QLabelRenderer::updateDisplayRegion() {
        
  if (!es || !es->isVisualStream() 
      || !qlabel || !qlabel->width() || !qlabel->height()) {
    dprintf_err("QLabelRenderer::updateDisplayRegion(): invalid members: es = %p, qlabel = %p\n",
                es, qlabel);
                ::exit(1);
    return false;
  }

        return VideoRenderer::updateDisplayRegion();

}

bool QLabelRenderer::open()
{
  if (!updateDisplayRegion()) {
    state = STREAMERR;
    return false;
  }
  /* initialize frameBuffer */
  if (frameBuffer) {
    delete frameBuffer;
    frameBuffer = NULL;
  }
  switch (colorSpace) {
  case UncompressedVideoFrame::ColorSpaceGRAY8:
    frame_info.size = frame_info.width * frame_info.height;
    // construct a frame buffer with 8 bpp and a color table of size 256
    frameBuffer = new QFrameBuffer(qlabel, 8, 256, true, eventType);
    break;
  case UncompressedVideoFrame::ColorSpaceRGB24:
    frame_info.size = frame_info.width * frame_info.height * 3;
    frameBuffer = new QFrameBuffer(qlabel, 24, 0, false, eventType);
    break;
  case UncompressedVideoFrame::ColorSpaceRGB32:
    frame_info.size = frame_info.width * frame_info.height * 4;
    frameBuffer = new QFrameBuffer(qlabel, 32, 0, false, eventType);
    break;
  default:
    dprintf_err("QLabelRenderer::open(): invalid color space: %d\n", colorSpace);
    state = STREAMERR;
    return false;
  }

  if (!frameBuffer) {
    dprintf_err("QLabelRenderer::open(): QFrameBuffer creation FAILED! (w = %d, h = %d)\n",
                qlabel->width(), qlabel->height());
    state = STREAMERR;
    return false;
  }

        //setVideoFrameBuffer(frameBuffer);
  state = OPEN;
  framesSeen = 0;
  currentFrameNumber = 0;
  dprintf_small("QLabelRenderer::open(): initialized frame and display regions:\n"
                                                                "    frame: width = %d, height = %d, size = %d, scaleX = %5.3f, scaleY = %5.3f\n"
                                                                "    display: x(%d:%d), y(%d:%d), width = %d, height = %d\n",
                                                                frame_info.width, frame_info.height, frame_info.size,
                                                                FIXED2DOUBLE(frame_info.scaleX), FIXED2DOUBLE(frame_info.scaleY),
                                                                display_region.left, display_region.left + display_region.width,
                                                                display_region.top, display_region.top + display_region.height,
                                                                display_region.width, display_region.height);
  return true;
}


int QLabelRenderer::writeFrame(Frame * frm, ESInfo *out_es)
{
        return VideoRenderer::writeFrame(frm);
}

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