void FaceDetectFilter::processFrame()
{
QImage image = frameImage();
QImage histo = highlightFaces(image);
enqueue(new VideoFrame(histo,m_frame->holdTime()));
}
void HistogramFilter::generateHistogram()
{
if(!m_frame)
return;
QImage image = frameImage();
QImage histo = makeHistogram(image);
VideoFrame *frame = new VideoFrame(histo,m_frame->holdTime());
if(m_includeOriginalImage)
frame->setCaptureTime(m_frame->captureTime());
enqueue(frame);
}
void tst_QVideoFrame::imageDetach()
{
const uint red = qRgb(255, 0, 0);
const uint blue = qRgb(0, 0, 255);
QImage image(8, 8, QImage::Format_RGB32);
image.fill(red);
QCOMPARE(image.pixel(4, 4), red);
QVideoFrame frame(image);
QVERIFY(frame.map(QAbstractVideoBuffer::ReadWrite));
QImage frameImage(frame.bits(), 8, 8, frame.bytesPerLine(), QImage::Format_RGB32);
QCOMPARE(frameImage.pixel(4, 4), red);
frameImage.fill(blue);
QCOMPARE(frameImage.pixel(4, 4), blue);
// Original image has detached and is therefore unchanged.
QCOMPARE(image.pixel(4, 4), red);
}
// Loads the next image in the set, deletes the "last image" and
// moves the currently decoded one to last image.
int ISSImages::loadNextImage()
{
if ( filenames.size() <= 0 )
{
printf("ERROR, no files to load\n");
return -1;
}
// Iterate our image safely
if ( current_image + 1 == filenames.end() )
current_image = filenames.begin();
else
current_image++;
// Rotate decoded images
if ( previous_image_surface )
SDL_FreeSurface(previous_image_surface);
if ( current_image_surface )
previous_image_surface = current_image_surface;
// Begin our load
std::cout << "Loading image " << *current_image << "...";
FILE *fp = fopen((*current_image).c_str(), "rb");
if ( !fp )
{
printf("Can't open file.\n");
return -1;
}
// Determine the size of the file for our buffer
fseek(fp, 0, SEEK_END);
unsigned long fsize = ftell(fp);
rewind(fp);
// Make a memory buffer the size of the image on our heap
unsigned char *buf = new unsigned char[fsize];
// Read the file into our buffer
if ( fread(buf, 1, fsize, fp) != fsize)
{
printf("Can't read file.\n");
return -1;
}
fclose(fp);
// Parse the exif data to get the rotation
EXIFInfo result;
ParseEXIF(buf, fsize, result);
// Create an SDL_RWops since we already have the file loaded, we don't
// need another buffer with it, we'll load it and create a surface
// from the buffer already containing the JPEG
SDL_RWops *file;
file = SDL_RWFromMem( buf, fsize );
current_image_surface = IMG_Load_RW( file, 0 );
SDL_FreeRW(file);
if ( ! current_image_surface )
{
printf("ERROR Loading image!\n");
return -1;
}
delete[] buf;
printf("done\n");
// rotate the image if necessary
// we want to do this before scaling because it will change whether it's
// scaled to the W or the H to fit our display
// -----------------------------------------------------------------------------
int rotation = 0;
bool mirrored = false;
switch (result.orientation)
{
case 7:
mirrored = true;
case 8:
rotation = 270;
break;
case 5:
mirrored = true;
case 6:
rotation = 90;
break;
case 4:
mirrored = true;
case 3:
rotation = 180;
break;
case 2:
mirrored = true;
case 1:
rotation = 0;
break;
}
if ( mirrored || rotation )
{
printf("Rotating image...");
if ( rotateImage(rotation, mirrored) )
printf("ERROR Rotating image!\n");
else
printf("done\n");
}
// scale the image if necessary
// -----------------------------------------------------------------------------
int w = current_image_surface->w;
int h = current_image_surface->h;
if (w != 800)
{
h = (h * 800) / w;
w = 800;
}
if (h > 600)
{
w = (w * 600) / h;
h = 600;
}
if ( w != current_image_surface->w || h != current_image_surface->h)
{
printf("Scaling image...");
if ( scaleImage(w, h) )
printf("ERROR Scaling image!\n");
else
printf("done\n");
}
// frame the scaled image, if necessary
// -----------------------------------------------------------------------------
if ( 800 != current_image_surface->w || 600 != current_image_surface->h)
{
printf("Framing image...");
if ( frameImage(800, 600) )
printf("ERROR Framing image!\n");
else
printf("done\n");
}
// return success
// -----------------------------------------------------------------------------
return 0;
}
wxImage* wxWebcamV4L2::liveImage() const
{
return frameImage();
}
