mirror of
https://github.com/hyperion-project/hyperion.ng.git
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* implement set videomode via json api * refactor grabbers: - new base class - move shared code to base class * fix osx * rework all cmakelist files with auto file collection. except leddevices (need further restructuring) * store current video and grabbing mode * add json stuff * remove grabbingmode - we do not want to expose it
99 lines
2.3 KiB
C++
Executable File
99 lines
2.3 KiB
C++
Executable File
#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <linux/fb.h>
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#include <sys/mman.h>
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#include <sys/ioctl.h>
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// STL includes
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#include <iostream>
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// Local includes
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#include <grabber/FramebufferFrameGrabber.h>
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FramebufferFrameGrabber::FramebufferFrameGrabber(const QString & device, const unsigned width, const unsigned height)
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: Grabber("FRAMEBUFFERGRABBER", width, height)
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, _fbfd(0)
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, _fbp(0)
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, _fbDevice(device)
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{
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int result;
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struct fb_var_screeninfo vinfo;
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// Check if the framebuffer device can be opened and display the current resolution
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_fbfd = open(QSTRING_CSTR(_fbDevice), O_RDONLY);
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if (_fbfd == 0)
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{
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Error(_log, "Error openning %s", QSTRING_CSTR(_fbDevice));
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}
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else
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{
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// get variable screen information
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result = ioctl (_fbfd, FBIOGET_VSCREENINFO, &vinfo);
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if (result != 0)
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{
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Error(_log, "Could not get screen information");
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}
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else
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{
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Error(_log, "Display opened with resolution: %dx%d@%dbit", vinfo.xres, vinfo.yres, vinfo.bits_per_pixel);
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}
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close(_fbfd);
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}
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}
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FramebufferFrameGrabber::~FramebufferFrameGrabber()
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{
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}
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void FramebufferFrameGrabber::grabFrame(Image<ColorRgb> & image)
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{
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struct fb_var_screeninfo vinfo;
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unsigned capSize, bytesPerPixel;
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PixelFormat pixelFormat;
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/* Open the framebuffer device */
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_fbfd = open(QSTRING_CSTR(_fbDevice), O_RDONLY);
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/* get variable screen information */
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ioctl (_fbfd, FBIOGET_VSCREENINFO, &vinfo);
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bytesPerPixel = vinfo.bits_per_pixel / 8;
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capSize = vinfo.xres * vinfo.yres * bytesPerPixel;
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if (vinfo.bits_per_pixel == 16)
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{
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pixelFormat = PIXELFORMAT_BGR16;
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}
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else if (vinfo.bits_per_pixel == 24)
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{
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pixelFormat = PIXELFORMAT_BGR24;
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}
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else if (vinfo.bits_per_pixel == 32)
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{
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pixelFormat = PIXELFORMAT_BGR32;
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}
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else
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{
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Error(_log, "Unknown pixel format: %d bits per pixel", vinfo.bits_per_pixel);
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close(_fbfd);
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return;
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}
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/* map the device to memory */
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_fbp = (unsigned char*)mmap(0, capSize, PROT_READ, MAP_PRIVATE | MAP_NORESERVE, _fbfd, 0);
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_imageResampler.setHorizontalPixelDecimation(vinfo.xres/_width);
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_imageResampler.setVerticalPixelDecimation(vinfo.yres/_height);
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_imageResampler.processImage(_fbp,
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vinfo.xres,
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vinfo.yres,
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vinfo.xres * bytesPerPixel,
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pixelFormat,
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image);
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munmap(_fbp, capSize);
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close(_fbfd);
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}
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