mirror of
https://github.com/hyperion-project/hyperion.ng.git
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addff6f7ef
* BCM dynamic loading * cleanup * better handle start of dispmanx * set GrabberWrapper pointer to null on exit * Update DispmanxFrameGrabber.cpp
130 lines
4.0 KiB
C++
130 lines
4.0 KiB
C++
#pragma once
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// Utils includes
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#include <utils/Image.h>
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#include <utils/ColorRgba.h>
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#include <hyperion/Grabber.h>
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// dynamic linking
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#include <dlfcn.h>
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// BCM includes
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#ifdef BCM_FOUND
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#include <bcm_host.h>
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#else
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typedef int DISPMANX_DISPLAY_HANDLE_T;
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typedef Image<ColorRgba> DISPMANX_RESOURCE;
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typedef DISPMANX_RESOURCE* DISPMANX_RESOURCE_HANDLE_T;
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typedef int VC_IMAGE_TYPE_T, DISPMANX_TRANSFORM_T;
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const int VC_IMAGE_RGBA32 = 1, DISPMANX_SNAPSHOT_FILL = 1;
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struct VC_RECT_T { int left, top, width, height; };
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struct DISPMANX_MODEINFO_T { int width, height; uint32_t display_num; };
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#endif
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///
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/// The DispmanxFrameGrabber is used for creating snapshots of the display (screenshots) with a downsized and scaled resolution.
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///
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class DispmanxFrameGrabber : public Grabber
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{
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public:
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///
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/// Construct a DispmanxFrameGrabber that will capture snapshots with specified dimensions.
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///
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DispmanxFrameGrabber();
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~DispmanxFrameGrabber() override;
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///
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/// @brief Determine if the bcm library is available.
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///
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/// @return Zero, on success (i.e. library is present), else negative
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///
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bool isAvailable();
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///
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/// @brief Opens the input device.
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///
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/// @return Zero, on success (i.e. device is ready), else negative
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///
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bool open();
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///
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/// @brief Setup a new capture screen, will free the previous one
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/// @return True on success, false if no screen is found
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///
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bool setupScreen();
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///
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/// Captures a single snapshot of the display and writes the data to the given image. The
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/// provided image should have the same dimensions as the configured values (_width and
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/// _height)
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///
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/// @param[out] image The snapped screenshot (should be initialized with correct width and
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/// height)
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///
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int grabFrame(Image<ColorRgb> & image);
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///
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///@brief Set new width and height for dispmanx, overwrite Grabber.h impl
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bool setWidthHeight(int width, int height) override;
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QSize getScreenSize(int display=0) const;
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///
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/// @brief Discover DispmanX screens available (for configuration).
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///
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/// @param[in] params Parameters used to overwrite discovery default behaviour
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///
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/// @return A JSON structure holding a list of devices found
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///
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QJsonObject discover(const QJsonObject& params);
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private:
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///
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/// Updates the frame-grab flags as used by the VC library for frame grabbing
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///
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/// @param vc_flags The snapshot grabbing mask
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///
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void setFlags(DISPMANX_TRANSFORM_T vc_flags);
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///
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/// @brief free _vc_resource and captureBuffer
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///
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void freeResources();
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void* _lib;
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/// Handle to the display that is being captured
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DISPMANX_DISPLAY_HANDLE_T _vc_display;
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/// Handle to the resource for storing the captured snapshot
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DISPMANX_RESOURCE_HANDLE_T _vc_resource;
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/// Rectangle of the captured resource that is transferred to user space
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VC_RECT_T _rectangle;
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/// Flags (transforms) for creating snapshots
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DISPMANX_TRANSFORM_T _vc_flags;
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// temp buffer when capturing with unsupported pitch size or
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// when we need to crop the image
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ColorRgba* _captureBuffer;
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// size of the capture buffer in Pixels
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unsigned _captureBufferSize;
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// rgba output buffer
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Image<ColorRgba> _image_rgba;
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private:
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void (*wr_bcm_host_init)(void);
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void (*wr_bcm_host_deinit)(void);
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DISPMANX_DISPLAY_HANDLE_T (*wr_vc_dispmanx_display_open)(uint32_t device);
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int (*wr_vc_dispmanx_display_close)(DISPMANX_DISPLAY_HANDLE_T display);
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int (*wr_vc_dispmanx_display_get_info)(DISPMANX_DISPLAY_HANDLE_T display, DISPMANX_MODEINFO_T *pinfo);
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DISPMANX_RESOURCE_HANDLE_T (*wr_vc_dispmanx_resource_create)(VC_IMAGE_TYPE_T type, uint32_t width, uint32_t height, uint32_t *native_image_handle);
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int (*wr_vc_dispmanx_resource_delete)(DISPMANX_RESOURCE_HANDLE_T res);
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int (*wr_vc_dispmanx_resource_read_data)(DISPMANX_RESOURCE_HANDLE_T handle, const VC_RECT_T *p_rect, void *dst_address, uint32_t dst_pitch);
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void (*wr_vc_dispmanx_rect_set)(VC_RECT_T *rectangle, int left, int top, int width, int height);
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int (*wr_vc_dispmanx_snapshot) (DISPMANX_DISPLAY_HANDLE_T display, DISPMANX_RESOURCE_HANDLE_T snapshot_resource, DISPMANX_TRANSFORM_T transform);
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};
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