mythvrr.cpp

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// libmythbase
#include "libmythbase/mythconfig.h"
#include "libmythbase/mythlogging.h"
 
// libmythui
#include "mythvrr.h"
#if CONFIG_DRM
#include "platforms/mythdisplaydrm.h"
#include "platforms/drm/mythdrmvrr.h"
#endif
#if CONFIG_X11
#include "platforms/mythdisplayx11.h"
#include "platforms/mythnvcontrol.h"
#endif
#include "mythdisplay.h"
 
// Qt
#include <QObject>
 
#define LOC QString("VRR: ")
 
MythVRR::MythVRR(bool Controllable, VRRType Type, bool Enabled, MythVRRRange Range)
  : m_controllable(Controllable),
    m_type(Type),
    m_enabled(Enabled),
    m_range(std::move(Range))
{
}
 
MythVRRPtr MythVRR::Create(MythDisplay* MDisplay)
{
    if (!MDisplay)
        return nullptr;
 
    MythVRRPtr result = nullptr;
 
#if CONFIG_X11 || CONFIG_DRM
    const auto range = MDisplay->GetEDID().GetVRRRange();
 
#if CONFIG_X11
    // GSync is only available with X11 over Display Port
    if (auto nvcontrol = MythNVControl::Create(); nvcontrol)
        if (auto gsync = MythGSync::CreateGSync(nvcontrol, range); gsync)
            result = gsync;
#endif
 
#if CONFIG_DRM
    // FreeSync is only currently *controllable* via DRM with an AMD GPU/APU and Display Port
    if (!result)
    {
        if (auto * display = dynamic_cast<MythDisplayDRM*>(MDisplay); display && display->GetDevice())
            if (auto freesync = MythDRMVRR::CreateFreeSync(display->GetDevice(), range); freesync)
                result =  freesync;
    }
 
    // If we don't have support for controlling FreeSync then DRM may still be able to
    // tell us if it is available/enabled - which is still useful
    if (!result)
    {
        if (auto drm = MythDRMDevice::Create(MDisplay->GetCurrentScreen(), DRM_QUIET); drm)
            if (auto freesync = MythDRMVRR::CreateFreeSync(drm, range); freesync)
                result = freesync;
    }
#endif
#endif
 
    if (!result)
    {
        LOG(VB_GENERAL, LOG_INFO, LOC + "No variable refresh rate support detected");
    }
    else
    {
        LOG(VB_GENERAL, LOG_INFO, LOC + QString("VRR type '%1': Enabled: %2 Controllable: %3 %4")
            .arg(result->TypeToString()).arg(result->Enabled()).arg(result->IsControllable())
            .arg(result->RangeDescription()));
    }
    return result;
}
 
bool MythVRR::Enabled() const
{
    return m_enabled;
}
 
MythVRRRange MythVRR::GetRange() const
{
    return m_range;
}
 
bool MythVRR::IsControllable() const
{
    return m_controllable;
}
 
QString MythVRR::TypeToString() const
{
    switch (m_type)
    {
        case FreeSync:    return QObject::tr("FreeSync");
        case GSync:       return QObject::tr("GSync");
        case GSyncCompat: return QObject::tr("GSync Compatible");
        default: break;
    }
    return QObject::tr("None");
}
 
QString MythVRR::RangeDescription() const
{
    if (std::get<0>(m_range) > 0 && std::get<1>(m_range) > 0)
    {
        return QObject::tr("Range: %1-%2%3")
            .arg(std::get<0>(m_range)).arg(std::get<1>(m_range))
            .arg(std::get<2>(m_range) ? "" : " (Estimated)");
    }
    return {};
}