moonlight-qt/app/settings/streamingpreferences.cpp

#include "streamingpreferences.h"

#include <QSettings>

#define SER_STREAMSETTINGS "streamsettings"
#define SER_WIDTH "width"
#define SER_HEIGHT "height"
#define SER_FPS "fps"
#define SER_BITRATE "bitrate"
#define SER_FULLSCREEN "fullscreen"
#define SER_VSYNC "vsync"
#define SER_GAMEOPTS "gameopts"
#define SER_HOSTAUDIO "hostaudio"
#define SER_MULTICONT "multicontroller"
#define SER_AUDIOCFG "audiocfg"
#define SER_VIDEOCFG "videocfg"
#define SER_VIDEODEC "videodec"
#define SER_WINDOWMODE "windowmode"
#define SER_UNSUPPORTEDFPS "unsupportedfps"
#define SER_MDNS "mdns"
#define SER_QUITAPPAFTER "quitAppAfter"
#define SER_MOUSEACCELERATION "mouseacceleration"
#define SER_STARTWINDOWED "startwindowed"
#define SER_FRAMEPACING "framepacing"
#define SER_CONNWARNINGS "connwarnings"

StreamingPreferences::StreamingPreferences(QObject *parent)
    : QObject(parent)
{
    reload();
}

void StreamingPreferences::reload()
{
    QSettings settings;

    width = settings.value(SER_WIDTH, 1280).toInt();
    height = settings.value(SER_HEIGHT, 720).toInt();
    fps = settings.value(SER_FPS, 60).toInt();
    bitrateKbps = settings.value(SER_BITRATE, getDefaultBitrate(width, height, fps)).toInt();
    enableVsync = settings.value(SER_VSYNC, true).toBool();
    gameOptimizations = settings.value(SER_GAMEOPTS, true).toBool();
    playAudioOnHost = settings.value(SER_HOSTAUDIO, false).toBool();
    multiController = settings.value(SER_MULTICONT, true).toBool();
    unsupportedFps = settings.value(SER_UNSUPPORTEDFPS, false).toBool();
    enableMdns = settings.value(SER_MDNS, true).toBool();
    quitAppAfter = settings.value(SER_QUITAPPAFTER, false).toBool();
    mouseAcceleration = settings.value(SER_MOUSEACCELERATION, false).toBool();
    startWindowed = settings.value(SER_STARTWINDOWED, false).toBool();
    framePacing = settings.value(SER_FRAMEPACING, false).toBool();
    connectionWarnings = settings.value(SER_CONNWARNINGS, true).toBool();
    audioConfig = static_cast<AudioConfig>(settings.value(SER_AUDIOCFG,
                                                  static_cast<int>(AudioConfig::AC_STEREO)).toInt());
    videoCodecConfig = static_cast<VideoCodecConfig>(settings.value(SER_VIDEOCFG,
                                                  static_cast<int>(VideoCodecConfig::VCC_AUTO)).toInt());
    videoDecoderSelection = static_cast<VideoDecoderSelection>(settings.value(SER_VIDEODEC,
                                                  static_cast<int>(VideoDecoderSelection::VDS_AUTO)).toInt());
    windowMode = static_cast<WindowMode>(settings.value(SER_WINDOWMODE,
                                                        // Try to load from the old preference value too
                                                        static_cast<int>(settings.value(SER_FULLSCREEN, true).toBool() ?
                                                                             WindowMode::WM_FULLSCREEN : WindowMode::WM_WINDOWED)).toInt());
}

void StreamingPreferences::save()
{
    QSettings settings;

    settings.setValue(SER_WIDTH, width);
    settings.setValue(SER_HEIGHT, height);
    settings.setValue(SER_FPS, fps);
    settings.setValue(SER_BITRATE, bitrateKbps);
    settings.setValue(SER_VSYNC, enableVsync);
    settings.setValue(SER_GAMEOPTS, gameOptimizations);
    settings.setValue(SER_HOSTAUDIO, playAudioOnHost);
    settings.setValue(SER_MULTICONT, multiController);
    settings.setValue(SER_UNSUPPORTEDFPS, unsupportedFps);
    settings.setValue(SER_MDNS, enableMdns);
    settings.setValue(SER_QUITAPPAFTER, quitAppAfter);
    settings.setValue(SER_MOUSEACCELERATION, mouseAcceleration);
    settings.setValue(SER_STARTWINDOWED, startWindowed);
    settings.setValue(SER_FRAMEPACING, framePacing);
    settings.setValue(SER_CONNWARNINGS, connectionWarnings);
    settings.setValue(SER_AUDIOCFG, static_cast<int>(audioConfig));
    settings.setValue(SER_VIDEOCFG, static_cast<int>(videoCodecConfig));
    settings.setValue(SER_VIDEODEC, static_cast<int>(videoDecoderSelection));
    settings.setValue(SER_WINDOWMODE, static_cast<int>(windowMode));
}

int StreamingPreferences::getDefaultBitrate(int width, int height, int fps)
{
    // This table prefers 16:10 resolutions because they are
    // only slightly more pixels than the 16:9 equivalents, so
    // we don't want to bump those 16:10 resolutions up to the
    // next 16:9 slot.

    // This covers 1280x720 and 1280x800 too
    if (width * height <= 1366 * 768) {
        return static_cast<int>(5000 * (fps / 30.0));
    }
    else if (width * height <= 1920 * 1200) {
        return static_cast<int>(10000 * (fps / 30.0));
    }
    else if (width * height <= 2560 * 1600) {
        return static_cast<int>(20000 * (fps / 30.0));
    }
    else /* if (width * height <= 3840 * 2160) */ {
        return static_cast<int>(40000 * (fps / 30.0));
    }
}