moonlight-qt/app/streaming/video/ffmpeg-renderers/drm.h

#pragma once

#include "renderer.h"

#include <xf86drm.h>
#include <xf86drmMode.h>

// Newer libdrm headers have these HDR structs, but some older ones don't.
namespace DrmDefs
{
    // HDR structs is copied from linux include/linux/hdmi.h
    struct hdr_metadata_infoframe
    {
        uint8_t eotf;
        uint8_t metadata_type;

        struct
        {
            uint16_t x, y;
        } display_primaries[3];

        struct
        {
            uint16_t x, y;
        } white_point;

        uint16_t max_display_mastering_luminance;
        uint16_t min_display_mastering_luminance;

        uint16_t max_cll;
        uint16_t max_fall;
    };

    struct hdr_output_metadata
    {
        uint32_t metadata_type;

        union {
            struct hdr_metadata_infoframe hdmi_metadata_type1;
        };
    };
}

class DrmRenderer : public IFFmpegRenderer {
public:
    DrmRenderer(IFFmpegRenderer *backendRenderer = nullptr);
    virtual ~DrmRenderer() override;
    virtual bool initialize(PDECODER_PARAMETERS params) override;
    virtual bool prepareDecoderContext(AVCodecContext* context, AVDictionary** options) override;
    virtual void renderFrame(AVFrame* frame) override;
    virtual enum AVPixelFormat getPreferredPixelFormat(int videoFormat) override;
    virtual bool isPixelFormatSupported(int videoFormat, AVPixelFormat pixelFormat) override;
    virtual int getRendererAttributes() override;
    virtual bool needsTestFrame() override;
    virtual bool testRenderFrame(AVFrame* frame) override;
    virtual bool isDirectRenderingSupported() override;
    virtual void setHdrMode(bool enabled) override;
#ifdef HAVE_EGL
    virtual bool canExportEGL() override;
    virtual AVPixelFormat getEGLImagePixelFormat() override;
    virtual bool initializeEGL(EGLDisplay dpy, const EGLExtensions &ext) override;
    virtual ssize_t exportEGLImages(AVFrame *frame, EGLDisplay dpy, EGLImage images[EGL_MAX_PLANES]) override;
    virtual void freeEGLImages(EGLDisplay dpy, EGLImage[EGL_MAX_PLANES]) override;
#endif

private:
    const char* getDrmColorEncodingValue(AVFrame* frame);
    const char* getDrmColorRangeValue(AVFrame* frame);

    IFFmpegRenderer* m_BackendRenderer;
    AVBufferRef* m_HwContext;
    int m_DrmFd;
    bool m_SdlOwnsDrmFd;
    bool m_SupportsDirectRendering;
    bool m_Main10Hdr;
    uint32_t m_ConnectorId;
    uint32_t m_EncoderId;
    uint32_t m_CrtcId;
    uint32_t m_PlaneId;
    uint32_t m_CurrentFbId;
    AVColorRange m_LastColorRange;
    AVColorSpace m_LastColorSpace;
    drmModePropertyPtr m_ColorEncodingProp;
    drmModePropertyPtr m_ColorRangeProp;
    drmModePropertyPtr m_HdrOutputMetadataProp;
    uint32_t m_HdrOutputMetadataBlobId;
    SDL_Rect m_OutputRect;

#ifdef HAVE_EGL
    bool m_EGLExtDmaBuf;
    PFNEGLCREATEIMAGEPROC m_eglCreateImage;
    PFNEGLDESTROYIMAGEPROC m_eglDestroyImage;
    PFNEGLCREATEIMAGEKHRPROC m_eglCreateImageKHR;
    PFNEGLDESTROYIMAGEKHRPROC m_eglDestroyImageKHR;
#endif
};