summaryrefslogtreecommitdiff
path: root/src/qcam/viewfinder.h
AgeCommit message (Collapse)Author
2020-03-24qcam: viewfinder: Display icon when stopping captureLaurent Pinchart
When stopping capture, display an icon instead of the last frame. This is required to be able to release the last buffer when the viewfinder operators in zero-copy mode. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2020-03-24qcam: viewfinder: Avoid memory copy when conversion isn't neededLaurent Pinchart
If the frame buffer format is identical to the display format, the viewfinder still invokes the converter to perform what is essentially a slow memcpy(). Make it possible to skip that operation by creating a QImage referencing the buffer memory instead. A reference to the frame buffer is kept internally, and released when the next buffer is queued, pushing the current one out. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2020-03-24qcam: viewfinder: Embed QImage in ViewFinderLaurent Pinchart
The QImage class is a thin wrapper that uses implicit sharing. We can thus embed it in the ViewFinder class instead of allocating it dynamically, and assign it at runtime. This simplifies the code. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2020-03-24qcam: viewfinder: Make the viewfinder hold a reference to a bufferLaurent Pinchart
The viewfinder is currently expected to render frames to the screen synchronously in the display() function, or at least to copy data so that the buffer can be queued in a new request when the function returns. This prevents optimisations when the capture format is identical to the display format. Make the viewfinder take ownership of the buffer, and notify of its release through a signal. The release is currently still synchronous, this will be addressed in a subsequent patch. Rename the ViewFinder::display() function to render() to better describe its purpose, as it's meant to start the rendering and not display the frame synchronously. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2020-03-24qcam: viewfinder: Add MappedBuffer to store memory mapping informationLaurent Pinchart
The new MappedBuffer structure replaces the std::pair<> used in the mapped buffers map, and allows passing data to the ViewFinder::display() function in a more structured way. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2020-03-24qcam: Use QSize through the code baseLaurent Pinchart
Qt has a QSize class to store sizes. Use it to replace width and height where applicable. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2020-03-18libcamera: PixelFormat: Mark all function arguments of type PixelFormat as ↵Niklas Söderlund
const reference PixelFormat was previously an alias for unsigned int but is now a class. Make all functions taking PixelFormat do so as a const reference. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-18libcamera: Use PixelFormat instead of unsigned int where appropriateNiklas Söderlund
Use the PixelFormat instead of unsigned int where a pixel format is to be used. PixelFormat is defined as an unsigned int but is about to be turned into a class to add functionality. There is no functional change in this patch. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-02-14qcam: Provide save image functionalityKieran Bingham
Implement a save image button on the toolbar which will take a current viewfinder image and present the user with a QFileDialog to allow them to choose where to save the image. Utilise the QImageWriter to perform the output task. Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-01-20qcam: Support scaling of the viewfinderLaurent Pinchart
The viewfinder is drawn using a QLabel. This could support scaling through QLabel::setScaledContents(), but in a very inefficient way. To maintain reasonable efficiency, turn the viewfinder into a QWidget and draw the image directly using a QPainter. No performance change was noticed running on a fast x86 machine, and performance was 60% higher when scaling up to full screen compared to QLabel. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2019-09-24qcam: Fix ViewFinder memory leakKieran Bingham
When setting the format on the ViewFinder, a new image_ is allocated. Any change in format deletes the existing allocation, but it is not cleaned up on shutdown: Direct leak of 32 byte(s) in 1 object(s) allocated from: #0 0x7f0bf8a7e17f in operator new(unsigned long) (/usr/lib/x86_64-linux-gnu/libasan.so.5+0x10e17f) #1 0x564c7205f7b0 in ViewFinder::setFormat(unsigned int, unsigned int, unsigned int) ../src/qcam/viewfinder.cpp:43 #2 0x564c71fec467 in MainWindow::startCapture() ../src/qcam/main_window.cpp:152 #3 0x564c71fe6c1a in MainWindow::MainWindow(libcamera::CameraManager*, OptionsParser::Options const&) ../src/qcam/main_window.cpp:40 #4 0x564c71fdf133 in main ../src/qcam/main.cpp:76 #5 0x7f0bf5944b6a in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x26b6a) Provide a ViewFinder destructor, and delete the allocation as appropriate. Fixes: 97e8b3a2eb32 ("qcam: Add Qt-based GUI application") Reviewed-by: Jacopo Mondi <jacopo@jmondi.org> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2019-04-02qcam: Add JPEG format supportLaurent Pinchart
When the camera provides MJPEG, use the QImage JPEG decompression code to convert that to RGB. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Tested-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
2019-03-29qcam: Add Qt-based GUI applicationLaurent Pinchart
qcam is a sample camera GUI application based on Qt. It demonstrates integration of the Qt event loop with libcamera. The application lets the user select a camera through the GUI, and then captures a single stream from the camera and displays it in a window. Only streams in YUYV formats are supported for now. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Tested-by: Kieran Bingham <kieran.bingham@ideasonboard.com>