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moonlight-qt/app/streaming/session.cpp

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#include "session.h"
#include "settings/streamingpreferences.h"
#include "streaming/streamutils.h"
#include <Limelight.h>
#include <SDL.h>
#include "utils.h"
#ifdef HAVE_FFMPEG
#include "video/ffmpeg.h"
#endif
#ifdef HAVE_SLVIDEO
#include "video/sl.h"
#endif
#ifdef Q_OS_WIN32
// Scaling the icon down on Win32 looks dreadful, so render at lower res
#define ICON_SIZE 32
#else
#define ICON_SIZE 64
#endif
#include <openssl/rand.h>
#include <QtEndian>
#include <QCoreApplication>
#include <QThreadPool>
#include <QSvgRenderer>
#include <QPainter>
#include <QImage>
CONNECTION_LISTENER_CALLBACKS Session::k_ConnCallbacks = {
Session::clStageStarting,
nullptr,
Session::clStageFailed,
nullptr,
Session::clConnectionTerminated,
nullptr,
nullptr,
Session::clLogMessage,
Session::clRumble
};
AUDIO_RENDERER_CALLBACKS Session::k_AudioCallbacks = {
Session::arInit,
nullptr,
nullptr,
Session::arCleanup,
Session::arDecodeAndPlaySample,
CAPABILITY_DIRECT_SUBMIT
};
Session* Session::s_ActiveSession;
QSemaphore Session::s_ActiveSessionSemaphore(1);
void Session::clStageStarting(int stage)
{
// We know this is called on the same thread as LiStartConnection()
// which happens to be the main thread, so it's cool to interact
// with the GUI in these callbacks.
emit s_ActiveSession->stageStarting(QString::fromLocal8Bit(LiGetStageName(stage)));
QCoreApplication::processEvents(QEventLoop::ExcludeUserInputEvents);
}
void Session::clStageFailed(int stage, long errorCode)
{
// We know this is called on the same thread as LiStartConnection()
// which happens to be the main thread, so it's cool to interact
// with the GUI in these callbacks.
emit s_ActiveSession->stageFailed(QString::fromLocal8Bit(LiGetStageName(stage)), errorCode);
QCoreApplication::processEvents(QEventLoop::ExcludeUserInputEvents);
}
void Session::clConnectionTerminated(long errorCode)
{
// Display the termination dialog if this was not intended
if (errorCode != 0) {
s_ActiveSession->m_UnexpectedTermination = true;
emit s_ActiveSession->displayLaunchError("Connection terminated");
}
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"Connection terminated: %ld",
errorCode);
// Push a quit event to the main loop
SDL_Event event;
event.type = SDL_QUIT;
event.quit.timestamp = SDL_GetTicks();
SDL_PushEvent(&event);
}
void Session::clLogMessage(const char* format, ...)
{
va_list ap;
va_start(ap, format);
SDL_LogMessageV(SDL_LOG_CATEGORY_APPLICATION,
SDL_LOG_PRIORITY_INFO,
format,
ap);
va_end(ap);
}
void Session::clRumble(unsigned short controllerNumber, unsigned short lowFreqMotor, unsigned short highFreqMotor)
{
s_ActiveSession->m_InputHandler->rumble(controllerNumber, lowFreqMotor, highFreqMotor);
}
#define CALL_INITIALIZE(dec) (dec)->initialize(vds, window, videoFormat, width, height, frameRate, enableVsync, enableFramePacing)
bool Session::chooseDecoder(StreamingPreferences::VideoDecoderSelection vds,
SDL_Window* window, int videoFormat, int width, int height,
int frameRate, bool enableVsync, bool enableFramePacing, bool testOnly, IVideoDecoder*& chosenDecoder)
{
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION,
"V-sync %s",
enableVsync ? "enabled" : "disabled");
#ifdef HAVE_SLVIDEO
chosenDecoder = new SLVideoDecoder(testOnly);
if (CALL_INITIALIZE(chosenDecoder)) {
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION,
"SLVideo video decoder chosen");
return true;
}
else {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"Unable to load SLVideo decoder");
delete chosenDecoder;
chosenDecoder = nullptr;
}
#endif
#ifdef HAVE_FFMPEG
chosenDecoder = new FFmpegVideoDecoder(testOnly);
if (CALL_INITIALIZE(chosenDecoder)) {
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION,
"FFmpeg-based video decoder chosen");
return true;
}
else {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"Unable to load FFmpeg decoder");
delete chosenDecoder;
chosenDecoder = nullptr;
}
#endif
#if !defined(HAVE_FFMPEG) && !defined(HAVE_SLVIDEO)
#error No video decoding libraries available!
#endif
// If we reach this, we didn't initialize any decoders successfully
return false;
}
int Session::drSetup(int videoFormat, int width, int height, int frameRate, void *, int)
{
s_ActiveSession->m_ActiveVideoFormat = videoFormat;
s_ActiveSession->m_ActiveVideoWidth = width;
s_ActiveSession->m_ActiveVideoHeight = height;
s_ActiveSession->m_ActiveVideoFrameRate = frameRate;
// Defer decoder setup until we've started streaming so we
// don't have to hide and show the SDL window (which seems to
// cause pointer hiding to break on Windows).
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION, "Video stream is %dx%dx%d (format 0x%x)",
width, height, frameRate, videoFormat);
return 0;
}
int Session::drSubmitDecodeUnit(PDECODE_UNIT du)
{
// Use a lock since we'll be yanking this decoder out
// from underneath the session when we initiate destruction.
// We need to destroy the decoder on the main thread to satisfy
// some API constraints (like DXVA2). If we can't acquire it,
// that means the decoder is about to be destroyed, so we can
// safely return DR_OK and wait for m_NeedsIdr to be set by
// the decoder reinitialization code.
if (SDL_AtomicTryLock(&s_ActiveSession->m_DecoderLock)) {
if (s_ActiveSession->m_NeedsIdr) {
// If we reset our decoder, we'll need to request an IDR frame
s_ActiveSession->m_NeedsIdr = false;
SDL_AtomicUnlock(&s_ActiveSession->m_DecoderLock);
return DR_NEED_IDR;
}
IVideoDecoder* decoder = s_ActiveSession->m_VideoDecoder;
if (decoder != nullptr) {
int ret = decoder->submitDecodeUnit(du);
SDL_AtomicUnlock(&s_ActiveSession->m_DecoderLock);
return ret;
}
else {
SDL_AtomicUnlock(&s_ActiveSession->m_DecoderLock);
return DR_OK;
}
}
else {
// Decoder is going away. Ignore anything coming in until
// the lock is released.
return DR_OK;
}
}
bool Session::isHardwareDecodeAvailable(StreamingPreferences::VideoDecoderSelection vds,
int videoFormat, int width, int height, int frameRate)
{
IVideoDecoder* decoder;
if (SDL_InitSubSystem(SDL_INIT_VIDEO) != 0) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"SDL_InitSubSystem(SDL_INIT_VIDEO) failed: %s",
SDL_GetError());
return false;
}
SDL_Window* window = SDL_CreateWindow("", 0, 0, width, height, SDL_WINDOW_HIDDEN);
if (!window) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"Failed to create window for hardware decode test: %s",
SDL_GetError());
SDL_QuitSubSystem(SDL_INIT_VIDEO);
return false;
}
if (!chooseDecoder(vds, window, videoFormat, width, height, frameRate, true, false, true, decoder)) {
SDL_DestroyWindow(window);
SDL_QuitSubSystem(SDL_INIT_VIDEO);
return false;
}
bool ret = decoder->isHardwareAccelerated();
delete decoder;
// This must be called after the decoder is deleted, because
// the renderer may want to interact with the window
SDL_DestroyWindow(window);
SDL_QuitSubSystem(SDL_INIT_VIDEO);
return ret;
}
int Session::getDecoderCapabilities(StreamingPreferences::VideoDecoderSelection vds,
int videoFormat, int width, int height, int frameRate)
{
IVideoDecoder* decoder;
if (SDL_InitSubSystem(SDL_INIT_VIDEO) != 0) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"SDL_InitSubSystem(SDL_INIT_VIDEO) failed: %s",
SDL_GetError());
return false;
}
SDL_Window* window = SDL_CreateWindow("", 0, 0, width, height, SDL_WINDOW_HIDDEN);
if (!window) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"Failed to create window for hardware decode test: %s",
SDL_GetError());
SDL_QuitSubSystem(SDL_INIT_VIDEO);
return false;
}
if (!chooseDecoder(vds, window, videoFormat, width, height, frameRate, true, false, true, decoder)) {
SDL_DestroyWindow(window);
SDL_QuitSubSystem(SDL_INIT_VIDEO);
return false;
}
int caps = decoder->getDecoderCapabilities();
delete decoder;
// This must be called after the decoder is deleted, because
// the renderer may want to interact with the window
SDL_DestroyWindow(window);
SDL_QuitSubSystem(SDL_INIT_VIDEO);
return caps;
}
Session::Session(NvComputer* computer, NvApp& app, StreamingPreferences *preferences)
: m_Preferences(preferences ? preferences : new StreamingPreferences(this)),
m_Computer(computer),
m_App(app),
m_Window(nullptr),
m_VideoDecoder(nullptr),
m_DecoderLock(0),
m_NeedsIdr(false),
m_AudioDisabled(false),
m_DisplayOriginX(0),
m_DisplayOriginY(0),
m_PendingWindowedTransition(false),
m_UnexpectedTermination(true), // Failure prior to streaming is unexpected
m_InputHandler(nullptr),
m_OpusDecoder(nullptr),
m_AudioRenderer(nullptr),
m_AudioSampleCount(0)
{
}
Session::~Session()
{
// Acquire session semaphore to ensure all cleanup is done before the destructor returns
// and the object is deallocated.
s_ActiveSessionSemaphore.acquire();
s_ActiveSessionSemaphore.release();
delete m_InputHandler;
}
void Session::initialize()
{
qInfo() << "Server GPU:" << m_Computer->gpuModel;
qInfo() << "Server GFE version:" << m_Computer->gfeVersion;
LiInitializeVideoCallbacks(&m_VideoCallbacks);
m_VideoCallbacks.setup = drSetup;
m_VideoCallbacks.submitDecodeUnit = drSubmitDecodeUnit;
// Slice up to 4 times for parallel decode, once slice per core
int slices = qMin(MAX_SLICES, SDL_GetCPUCount());
m_VideoCallbacks.capabilities |= CAPABILITY_SLICES_PER_FRAME(slices);
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION,
"Encoder configured for %d slices per frame",
slices);
LiInitializeStreamConfiguration(&m_StreamConfig);
m_StreamConfig.width = m_Preferences->width;
m_StreamConfig.height = m_Preferences->height;
m_StreamConfig.fps = m_Preferences->fps;
m_StreamConfig.bitrate = m_Preferences->bitrateKbps;
m_StreamConfig.hevcBitratePercentageMultiplier = 75;
m_StreamConfig.streamingRemotely = STREAM_CFG_AUTO;
m_StreamConfig.packetSize = 1392;
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION,
"Video bitrate: %d kbps",
m_StreamConfig.bitrate);
RAND_bytes(reinterpret_cast<unsigned char*>(m_StreamConfig.remoteInputAesKey),
sizeof(m_StreamConfig.remoteInputAesKey));
// Only the first 4 bytes are populated in the RI key IV
RAND_bytes(reinterpret_cast<unsigned char*>(m_StreamConfig.remoteInputAesIv), 4);
switch (m_Preferences->audioConfig)
{
case StreamingPreferences::AC_STEREO:
m_StreamConfig.audioConfiguration = AUDIO_CONFIGURATION_STEREO;
break;
case StreamingPreferences::AC_51_SURROUND:
m_StreamConfig.audioConfiguration = AUDIO_CONFIGURATION_51_SURROUND;
break;
}
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION,
"Audio configuration: %d",
m_StreamConfig.audioConfiguration);
switch (m_Preferences->videoCodecConfig)
{
case StreamingPreferences::VCC_AUTO:
// TODO: Determine if HEVC is better depending on the decoder
m_StreamConfig.supportsHevc =
isHardwareDecodeAvailable(m_Preferences->videoDecoderSelection,
VIDEO_FORMAT_H265,
m_StreamConfig.width,
m_StreamConfig.height,
m_StreamConfig.fps);
#ifdef Q_OS_DARWIN
{
// Prior to GFE 3.11, GFE did not allow us to constrain
// the number of reference frames, so we have to fixup the SPS
// to allow decoding via VideoToolbox on macOS. Since we don't
// have fixup code for HEVC, just avoid it if GFE is too old.
QVector<int> gfeVersion = NvHTTP::parseQuad(m_Computer->gfeVersion);
if (gfeVersion.isEmpty() || // Very old versions don't have GfeVersion at all
gfeVersion[0] < 3 ||
(gfeVersion[0] == 3 && gfeVersion[1] < 11)) {
SDL_LogWarn(SDL_LOG_CATEGORY_APPLICATION,
"Disabling HEVC on macOS due to old GFE version");
m_StreamConfig.supportsHevc = false;
}
}
#endif
m_StreamConfig.enableHdr = false;
break;
case StreamingPreferences::VCC_FORCE_H264:
m_StreamConfig.supportsHevc = false;
m_StreamConfig.enableHdr = false;
break;
case StreamingPreferences::VCC_FORCE_HEVC:
m_StreamConfig.supportsHevc = true;
m_StreamConfig.enableHdr = false;
break;
case StreamingPreferences::VCC_FORCE_HEVC_HDR:
m_StreamConfig.supportsHevc = true;
m_StreamConfig.enableHdr = true;
break;
}
switch (m_Preferences->windowMode)
{
case StreamingPreferences::WM_FULLSCREEN_DESKTOP:
m_FullScreenFlag = SDL_WINDOW_FULLSCREEN_DESKTOP;
break;
case StreamingPreferences::WM_FULLSCREEN:
default:
m_FullScreenFlag = SDL_WINDOW_FULLSCREEN;
break;
}
}
void Session::emitLaunchWarning(QString text)
{
// Emit the warning to the UI
emit displayLaunchWarning(text);
// Wait a little bit so the user can actually read what we just said.
// This wait is a little longer than the actual toast timeout (3 seconds)
// to allow it to transition off the screen before continuing.
uint32_t start = SDL_GetTicks();
while (!SDL_TICKS_PASSED(SDL_GetTicks(), start + 3500)) {
// Pump the UI loop while we wait
SDL_Delay(5);
QCoreApplication::processEvents(QEventLoop::ExcludeUserInputEvents);
}
}
bool Session::validateLaunch()
{
QStringList warningList;
if (m_Preferences->videoDecoderSelection == StreamingPreferences::VDS_FORCE_SOFTWARE) {
emitLaunchWarning("Your settings selection to force software decoding may cause poor streaming performance.");
}
if (m_Preferences->unsupportedFps && m_StreamConfig.fps > 60) {
emitLaunchWarning("Using unsupported FPS options may cause stuttering or lag.");
if (m_Preferences->enableVsync) {
emitLaunchWarning("V-sync will be disabled when streaming at a higher frame rate than the display.");
}
}
if (m_StreamConfig.supportsHevc) {
bool hevcForced = m_Preferences->videoCodecConfig == StreamingPreferences::VCC_FORCE_HEVC ||
m_Preferences->videoCodecConfig == StreamingPreferences::VCC_FORCE_HEVC_HDR;
if (!isHardwareDecodeAvailable(m_Preferences->videoDecoderSelection,
VIDEO_FORMAT_H265,
m_StreamConfig.width,
m_StreamConfig.height,
m_StreamConfig.fps) &&
m_Preferences->videoDecoderSelection == StreamingPreferences::VDS_AUTO) {
if (hevcForced) {
emitLaunchWarning("Using software decoding due to your selection to force HEVC without GPU support. This may cause poor streaming performance.");
}
else {
emitLaunchWarning("This PC's GPU doesn't support HEVC decoding.");
m_StreamConfig.supportsHevc = false;
}
}
if (hevcForced) {
if (m_Computer->maxLumaPixelsHEVC == 0) {
emitLaunchWarning("Your host PC GPU doesn't support HEVC. "
"A GeForce GTX 900-series (Maxwell) or later GPU is required for HEVC streaming.");
// Moonlight-common-c will handle this case already, but we want
// to set this explicitly here so we can do our hardware acceleration
// check below.
m_StreamConfig.supportsHevc = false;
}
}
}
if (m_StreamConfig.enableHdr) {
// Turn HDR back off unless all criteria are met.
m_StreamConfig.enableHdr = false;
// Check that the app supports HDR
if (!m_App.hdrSupported) {
emitLaunchWarning(m_App.name + " doesn't support HDR10.");
}
// Check that the server GPU supports HDR
else if (!(m_Computer->serverCodecModeSupport & 0x200)) {
emitLaunchWarning("Your host PC GPU doesn't support HDR streaming. "
"A GeForce GTX 1000-series (Pascal) or later GPU is required for HDR streaming.");
}
else if (!isHardwareDecodeAvailable(m_Preferences->videoDecoderSelection,
VIDEO_FORMAT_H265_MAIN10,
m_StreamConfig.width,
m_StreamConfig.height,
m_StreamConfig.fps)) {
emitLaunchWarning("This PC's GPU doesn't support HEVC Main10 decoding for HDR streaming.");
}
else {
// TODO: Also validate display capabilites
// Validation successful so HDR is good to go
m_StreamConfig.enableHdr = true;
}
}
if (m_StreamConfig.width >= 3840) {
// Only allow 4K on GFE 3.x+
if (m_Computer->gfeVersion.isEmpty() || m_Computer->gfeVersion.startsWith("2.")) {
emitLaunchWarning("GeForce Experience 3.0 or higher is required for 4K streaming.");
m_StreamConfig.width = 1920;
m_StreamConfig.height = 1080;
}
}
// Test if audio works at the specified audio configuration
bool audioTestPassed = testAudio(m_StreamConfig.audioConfiguration);
// Gracefully degrade to stereo if 5.1 doesn't work
if (!audioTestPassed && m_StreamConfig.audioConfiguration == AUDIO_CONFIGURATION_51_SURROUND) {
audioTestPassed = testAudio(AUDIO_CONFIGURATION_STEREO);
if (audioTestPassed) {
m_StreamConfig.audioConfiguration = AUDIO_CONFIGURATION_STEREO;
emitLaunchWarning("5.1 surround sound is not supported by the current audio device.");
}
}
// If nothing worked, warn the user that audio will not work
m_AudioDisabled = !audioTestPassed;
if (m_AudioDisabled) {
emitLaunchWarning("Failed to open audio device. Audio will be unavailable during this session.");
}
// Check for unmapped gamepads
if (!SdlInputHandler::getUnmappedGamepads().isEmpty()) {
emitLaunchWarning("An attached gamepad has no mapping and won't be usable. Visit the Moonlight help to resolve this.");
}
if (m_Preferences->videoDecoderSelection == StreamingPreferences::VDS_FORCE_HARDWARE &&
!isHardwareDecodeAvailable(m_Preferences->videoDecoderSelection,
m_StreamConfig.supportsHevc ? VIDEO_FORMAT_H265 : VIDEO_FORMAT_H264,
m_StreamConfig.width,
m_StreamConfig.height,
m_StreamConfig.fps)) {
if (m_Preferences->videoCodecConfig == StreamingPreferences::VCC_AUTO) {
emit displayLaunchError("Your selection to force hardware decoding cannot be satisfied due to missing hardware decoding support on this PC's GPU.");
}
else {
emit displayLaunchError("Your codec selection and force hardware decoding setting are not compatible. This PC's GPU lacks support for decoding your chosen codec.");
}
// Fail the launch, because we won't manage to get a decoder for the actual stream
return false;
}
// Add the capability flags from the chosen decoder/renderer
m_VideoCallbacks.capabilities |= getDecoderCapabilities(m_Preferences->videoDecoderSelection,
m_StreamConfig.supportsHevc ? VIDEO_FORMAT_H265 : VIDEO_FORMAT_H264,
m_StreamConfig.width,
m_StreamConfig.height,
m_StreamConfig.fps);
return true;
}
class DeferredSessionCleanupTask : public QRunnable
{
public:
DeferredSessionCleanupTask(Session* session) :
m_Session(session) {}
private:
virtual ~DeferredSessionCleanupTask() override
{
// Allow another session to start now that we're cleaned up
Session::s_ActiveSession = nullptr;
Session::s_ActiveSessionSemaphore.release();
}
void run() override
{
// Only quit the running app if our session terminated gracefully
bool shouldQuit =
!m_Session->m_UnexpectedTermination &&
m_Session->m_Preferences->quitAppAfter;
// Notify the UI
if (shouldQuit) {
emit m_Session->quitStarting();
}
else {
emit m_Session->sessionFinished();
}
// Finish cleanup of the connection state
LiStopConnection();
// Perform a best-effort app quit
if (shouldQuit) {
NvHTTP http(m_Session->m_Computer->activeAddress, m_Session->m_Computer->serverCert);
// Logging is already done inside NvHTTP
try {
http.quitApp();
} catch (const GfeHttpResponseException&) {
} catch (const QtNetworkReplyException&) {
}
// Session is finished now
emit m_Session->sessionFinished();
}
}
Session* m_Session;
};
void Session::getWindowDimensions(int& x, int& y,
int& width, int& height)
{
int displayIndex = 0;
bool fullScreen;
if (m_Window != nullptr) {
displayIndex = SDL_GetWindowDisplayIndex(m_Window);
SDL_assert(displayIndex >= 0);
fullScreen = (SDL_GetWindowFlags(m_Window) & SDL_WINDOW_FULLSCREEN);
}
// Create our window on the same display that Qt's UI
// was being displayed on.
else {
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION,
"Qt UI screen is at (%d,%d)",
m_DisplayOriginX, m_DisplayOriginY);
for (int i = 0; i < SDL_GetNumVideoDisplays(); i++) {
SDL_Rect displayBounds;
if (SDL_GetDisplayBounds(i, &displayBounds) == 0) {
if (displayBounds.x == m_DisplayOriginX &&
displayBounds.y == m_DisplayOriginY) {
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION,
"SDL found matching display %d",
i);
displayIndex = i;
break;
}
}
else {
SDL_LogWarn(SDL_LOG_CATEGORY_APPLICATION,
"SDL_GetDisplayBounds(%d) failed: %s",
i, SDL_GetError());
}
}
fullScreen = (m_Preferences->windowMode != StreamingPreferences::WM_WINDOWED);
}
SDL_Rect usableBounds;
if (fullScreen && SDL_GetDisplayBounds(displayIndex, &usableBounds) == 0) {
width = usableBounds.w;
height = usableBounds.h;
}
else if (SDL_GetDisplayUsableBounds(displayIndex, &usableBounds) == 0) {
width = usableBounds.w;
height = usableBounds.h;
if (m_Window != nullptr) {
int top, left, bottom, right;
if (SDL_GetWindowBordersSize(m_Window, &top, &left, &bottom, &right) == 0) {
width -= left + right;
height -= top + bottom;
}
else {
SDL_LogWarn(SDL_LOG_CATEGORY_APPLICATION,
"Unable to get window border size: %s",
SDL_GetError());
}
// If the stream window can fit within the usable drawing area with 1:1
// scaling, do that rather than filling the screen.
if (m_StreamConfig.width < width && m_StreamConfig.height < height) {
width = m_StreamConfig.width;
height = m_StreamConfig.height;
}
}
}
else {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"SDL_GetDisplayUsableBounds() failed: %s",
SDL_GetError());
width = m_StreamConfig.width;
height = m_StreamConfig.height;
}
x = y = SDL_WINDOWPOS_CENTERED_DISPLAY(displayIndex);
}
void Session::updateOptimalWindowDisplayMode()
{
SDL_DisplayMode desktopMode, bestMode, mode;
int displayIndex = SDL_GetWindowDisplayIndex(m_Window);
// Try the current display mode first. On macOS, this will be the normal
// scaled desktop resolution setting.
if (SDL_GetDesktopDisplayMode(displayIndex, &desktopMode) == 0) {
// If this doesn't fit the selected resolution, use the native
// resolution of the panel (unscaled).
if (desktopMode.w < m_ActiveVideoWidth || desktopMode.h < m_ActiveVideoHeight) {
if (!StreamUtils::getRealDesktopMode(displayIndex, &desktopMode)) {
return;
}
}
}
else {
SDL_LogWarn(SDL_LOG_CATEGORY_APPLICATION,
"SDL_GetDesktopDisplayMode() failed: %s",
SDL_GetError());
return;
}
// Start with the native desktop resolution and try to find
// the highest refresh rate that our stream FPS evenly divides.
bestMode = desktopMode;
bestMode.refresh_rate = 0;
for (int i = 0; i < SDL_GetNumDisplayModes(displayIndex); i++) {
if (SDL_GetDisplayMode(displayIndex, i, &mode) == 0) {
if (mode.w == desktopMode.w && mode.h == desktopMode.h &&
mode.refresh_rate % m_StreamConfig.fps == 0) {
if (mode.refresh_rate > bestMode.refresh_rate) {
bestMode = mode;
}
}
}
}
if (bestMode.refresh_rate == 0) {
// We may find no match if the user has moved a 120 FPS
// stream onto a 60 Hz monitor (since no refresh rate can
// divide our FPS setting). We'll stick to the default in
// this case.
SDL_LogWarn(SDL_LOG_CATEGORY_APPLICATION,
"No matching refresh rate found; using desktop mode");
bestMode = desktopMode;
}
if ((SDL_GetWindowFlags(m_Window) & SDL_WINDOW_FULLSCREEN_DESKTOP) == SDL_WINDOW_FULLSCREEN) {
// Only print when the window is actually in full-screen exclusive mode,
// otherwise we're not actually using the mode we've set here
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION,
"Chosen best display mode: %dx%dx%d",
bestMode.w, bestMode.h, bestMode.refresh_rate);
}
SDL_SetWindowDisplayMode(m_Window, &bestMode);
}
void Session::toggleFullscreen()
{
bool fullScreen = !(SDL_GetWindowFlags(m_Window) & m_FullScreenFlag);
if (fullScreen) {
SDL_SetWindowResizable(m_Window, SDL_FALSE);
SDL_SetWindowFullscreen(m_Window, m_FullScreenFlag);
}
else {
SDL_SetWindowFullscreen(m_Window, 0);
SDL_SetWindowResizable(m_Window, SDL_TRUE);
// Reposition the window when the resize is complete
m_PendingWindowedTransition = true;
}
}
void Session::exec(int displayOriginX, int displayOriginY)
{
m_DisplayOriginX = displayOriginX;
m_DisplayOriginY = displayOriginY;
// Complete initialization in this deferred context to avoid
// calling expensive functions in the constructor (during the
// process of loading the StreamSegue).
initialize();
// Check for validation errors/warnings and emit
// signals for them, if appropriate
if (!validateLaunch()) {
emit sessionFinished();
return;
}
// Wait 1.5 seconds before connecting to let the user
// have time to read any messages present on the segue
uint32_t start = SDL_GetTicks();
while (!SDL_TICKS_PASSED(SDL_GetTicks(), start + 1500)) {
// Pump the UI loop while we wait
SDL_Delay(5);
QCoreApplication::processEvents(QEventLoop::ExcludeUserInputEvents);
}
// Wait for any old session to finish cleanup
s_ActiveSessionSemaphore.acquire();
// We're now active
s_ActiveSession = this;
// Initialize the gamepad code with our preferences
StreamingPreferences prefs;
m_InputHandler = new SdlInputHandler(prefs, m_Computer,
m_StreamConfig.width,
m_StreamConfig.height);
// The UI should have ensured the old game was already quit
// if we decide to stream a different game.
Q_ASSERT(m_Computer->currentGameId == 0 ||
m_Computer->currentGameId == m_App.id);
// SOPS will set all settings to 720p60 if it doesn't recognize
// the chosen resolution. Avoid that by disabling SOPS when it
// is not streaming a supported resolution.
bool enableGameOptimizations = false;
for (const NvDisplayMode &mode : m_Computer->displayModes) {
if (mode.width == m_StreamConfig.width &&
mode.height == m_StreamConfig.height) {
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION,
"Found host supported resolution: %dx%d",
mode.width, mode.height);
enableGameOptimizations = prefs.gameOptimizations;
break;
}
}
try {
NvHTTP http(m_Computer->activeAddress, m_Computer->serverCert);
if (m_Computer->currentGameId != 0) {
http.resumeApp(&m_StreamConfig);
}
else {
http.launchApp(m_App.id, &m_StreamConfig,
enableGameOptimizations,
prefs.playAudioOnHost,
m_InputHandler->getAttachedGamepadMask());
}
} catch (const GfeHttpResponseException& e) {
emit displayLaunchError(e.toQString());
QThreadPool::globalInstance()->start(new DeferredSessionCleanupTask(this));
return;
} catch (const QtNetworkReplyException& e) {
emit displayLaunchError(e.toQString());
QThreadPool::globalInstance()->start(new DeferredSessionCleanupTask(this));
return;
}
SDL_assert(!SDL_WasInit(SDL_INIT_VIDEO));
if (SDL_InitSubSystem(SDL_INIT_VIDEO) != 0) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"SDL_InitSubSystem(SDL_INIT_VIDEO) failed: %s",
SDL_GetError());
emit displayLaunchError(QString::fromLocal8Bit(SDL_GetError()));
QThreadPool::globalInstance()->start(new DeferredSessionCleanupTask(this));
return;
}
QByteArray hostnameStr = m_Computer->activeAddress.toLatin1();
QByteArray siAppVersion = m_Computer->appVersion.toLatin1();
SERVER_INFORMATION hostInfo;
hostInfo.address = hostnameStr.data();
hostInfo.serverInfoAppVersion = siAppVersion.data();
// Older GFE versions didn't have this field
QByteArray siGfeVersion;
if (!m_Computer->gfeVersion.isEmpty()) {
siGfeVersion = m_Computer->gfeVersion.toLatin1();
}
if (!siGfeVersion.isEmpty()) {
hostInfo.serverInfoGfeVersion = siGfeVersion.data();
}
int err = LiStartConnection(&hostInfo, &m_StreamConfig, &k_ConnCallbacks,
&m_VideoCallbacks,
m_AudioDisabled ? nullptr : &k_AudioCallbacks,
NULL, 0, NULL, 0);
if (err != 0) {
// We already displayed an error dialog in the stage failure
// listener.
SDL_QuitSubSystem(SDL_INIT_VIDEO);
QThreadPool::globalInstance()->start(new DeferredSessionCleanupTask(this));
return;
}
// Pump the message loop to update the UI
emit connectionStarted();
QCoreApplication::processEvents(QEventLoop::ExcludeUserInputEvents);
int x, y, width, height;
getWindowDimensions(x, y, width, height);
m_Window = SDL_CreateWindow("Moonlight",
x,
y,
width,
height,
SDL_WINDOW_ALLOW_HIGHDPI);
if (!m_Window) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"SDL_CreateWindow() failed: %s",
SDL_GetError());
SDL_QuitSubSystem(SDL_INIT_VIDEO);
QThreadPool::globalInstance()->start(new DeferredSessionCleanupTask(this));
return;
}
QSvgRenderer svgIconRenderer(QString(":/res/moonlight.svg"));
QImage svgImage(ICON_SIZE, ICON_SIZE, QImage::Format_RGBA8888);
svgImage.fill(0);
QPainter svgPainter(&svgImage);
svgIconRenderer.render(&svgPainter);
SDL_Surface* iconSurface = SDL_CreateRGBSurfaceWithFormatFrom((void*)svgImage.constBits(),
svgImage.width(),
svgImage.height(),
32,
4 * svgImage.width(),
SDL_PIXELFORMAT_RGBA32);
#ifndef Q_OS_DARWIN
// Other platforms seem to preserve our Qt icon when creating a new window.
if (iconSurface != nullptr) {
// This must be called before entering full-screen mode on Windows
// or our icon will not persist when toggling to windowed mode
SDL_SetWindowIcon(m_Window, iconSurface);
}
#endif
// For non-full screen windows, call getWindowDimensions()
// again after creating a window to allow it to account
// for window chrome size.
if (m_Preferences->windowMode == StreamingPreferences::WM_WINDOWED) {
getWindowDimensions(x, y, width, height);
// We must set the size before the position because centering
// won't work unless it knows the final size of the window.
SDL_SetWindowSize(m_Window, width, height);
SDL_SetWindowPosition(m_Window, x, y);
// Passing SDL_WINDOW_RESIZABLE to set this during window
// creation causes our window to be full screen for some reason
SDL_SetWindowResizable(m_Window, SDL_TRUE);
}
else {
// Update the window display mode based on our current monitor
updateOptimalWindowDisplayMode();
// Enter full screen
SDL_SetWindowFullscreen(m_Window, m_FullScreenFlag);
}
#ifndef QT_DEBUG
// Capture the mouse by default on release builds only.
// This prevents the mouse from becoming trapped inside
// Moonlight when it's halted at a debug break.
if (m_Preferences->windowMode != StreamingPreferences::WM_WINDOWED) {
SDL_SetRelativeMouseMode(SDL_TRUE);
}
#endif
// Stop text input. SDL enables it by default
// when we initialize the video subsystem, but this
// causes an IME popup when certain keys are held down
// on macOS.
SDL_StopTextInput();
// Disable the screen saver
SDL_DisableScreenSaver();
// Set timer resolution to 1 ms on Windows for greater
// sleep precision and more accurate callback timing.
SDL_SetHint(SDL_HINT_TIMER_RESOLUTION, "1");
// Raise the priority of the main thread, since it handles
// time-sensitive video rendering
if (SDL_SetThreadPriority(SDL_THREAD_PRIORITY_HIGH) < 0) {
SDL_LogWarn(SDL_LOG_CATEGORY_APPLICATION,
"Unable to set main thread to high priority: %s",
SDL_GetError());
}
int currentDisplayIndex = SDL_GetWindowDisplayIndex(m_Window);
// Now that we're about to stream, any SDL_QUIT event is expected
// unless it comes from the connection termination callback where
// (m_UnexpectedTermination is set back to true).
m_UnexpectedTermination = false;
// Hijack this thread to be the SDL main thread. We have to do this
// because we want to suspend all Qt processing until the stream is over.
SDL_Event event;
for (;;) {
// We explicitly use SDL_PollEvent() and SDL_Delay() because
// SDL_WaitEvent() has an internal SDL_Delay(10) inside which
// blocks this thread too long for high polling rate mice and high
// refresh rate displays.
if (!SDL_PollEvent(&event)) {
SDL_Delay(1);
continue;
}
switch (event.type) {
case SDL_QUIT:
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION,
"Quit event received");
goto DispatchDeferredCleanup;
case SDL_USEREVENT: {
SDL_Event nextEvent;
SDL_assert(event.user.code == SDL_CODE_FRAME_READY);
// Drop any earlier frames
while (SDL_PeepEvents(&nextEvent,
1,
SDL_GETEVENT,
SDL_USEREVENT,
SDL_USEREVENT) == 1) {
m_VideoDecoder->dropFrame(&event.user);
event = nextEvent;
}
// Render the last frame
m_VideoDecoder->renderFrame(&event.user);
break;
}
case SDL_WINDOWEVENT:
// Capture mouse cursor when user actives the window by clicking on
// window's client area (borders and title bar excluded).
// Without this you would have to click the window twice (once to
// activate it, second time to enable capture). With this you need to
// click it only once.
// On Linux, the button press event is delivered after the focus gain
// so this is not neccessary (and leads to a click sent to the host
// when focusing the window by clicking).
// By excluding window's borders and title bar out, lets user still
// interact with them without mouse capture kicking in.
#if defined(Q_OS_WIN32) || defined(Q_OS_DARWIN)
if (event.window.event == SDL_WINDOWEVENT_FOCUS_GAINED) {
int mouseX, mouseY;
Uint32 mouseState = SDL_GetGlobalMouseState(&mouseX, &mouseY);
if (mouseState & SDL_BUTTON(SDL_BUTTON_LEFT)) {
int x, y, width, height;
SDL_GetWindowPosition(m_Window, &x, &y);
SDL_GetWindowSize(m_Window, &width, &height);
if (mouseX > x && mouseX < x+width && mouseY > y && mouseY < y+height) {
SDL_SetRelativeMouseMode(SDL_TRUE);
}
}
}
#endif
if (event.window.event == SDL_WINDOWEVENT_FOCUS_LOST) {
// Release mouse cursor when another window is activated (e.g. by using ALT+TAB).
// This lets user to interact with our window's title bar and with the buttons in it.
// Doing this while the window is full-screen breaks the transition out of FS
// (desktop and exclusive), so we must check for that before releasing mouse capture.
if (!(SDL_GetWindowFlags(m_Window) & SDL_WINDOW_FULLSCREEN)) {
SDL_SetRelativeMouseMode(SDL_FALSE);
}
// Raise all keys that are currently pressed. If we don't do this, certain keys
// used in shortcuts that cause focus loss (such as Alt+Tab) may get stuck down.
m_InputHandler->raiseAllKeys();
}
// We want to recreate the decoder for resizes (full-screen toggles) and the initial shown event.
// We use SDL_WINDOWEVENT_SIZE_CHANGED rather than SDL_WINDOWEVENT_RESIZED because the latter doesn't
// seem to fire when switching from windowed to full-screen on X11.
if (event.window.event != SDL_WINDOWEVENT_SIZE_CHANGED && event.window.event != SDL_WINDOWEVENT_SHOWN) {
// Check that the window display hasn't changed. If it has, we want
// to recreate the decoder to allow it to adapt to the new display.
// This will allow Pacer to pull the new display refresh rate.
if (SDL_GetWindowDisplayIndex(m_Window) == currentDisplayIndex) {
break;
}
}
// Complete any repositioning that was deferred until
// the resize from full-screen to windowed had completed.
// If we try to do this immediately, the resize won't take effect
// properly on Windows.
if (m_PendingWindowedTransition) {
m_PendingWindowedTransition = false;
int x, y, width, height;
getWindowDimensions(x, y, width, height);
SDL_SetWindowSize(m_Window, width, height);
SDL_SetWindowPosition(m_Window, x, y);
}
// Fall through
case SDL_RENDER_DEVICE_RESET:
case SDL_RENDER_TARGETS_RESET:
SDL_AtomicLock(&m_DecoderLock);
// Destroy the old decoder
delete m_VideoDecoder;
// Flush any other pending window events that could
// send us back here immediately
SDL_PumpEvents();
SDL_FlushEvent(SDL_WINDOWEVENT);
// Update the window display mode based on our current monitor
currentDisplayIndex = SDL_GetWindowDisplayIndex(m_Window);
updateOptimalWindowDisplayMode();
// Now that the old decoder is dead, flush any events it may
// have queued to reset itself (if this reset was the result
// of state loss).
SDL_PumpEvents();
SDL_FlushEvent(SDL_RENDER_DEVICE_RESET);
SDL_FlushEvent(SDL_RENDER_TARGETS_RESET);
{
// If the stream exceeds the display refresh rate (plus some slack),
// forcefully disable V-sync to allow the stream to render faster
// than the display.
int displayHz = StreamUtils::getDisplayRefreshRate(m_Window);
bool enableVsync = m_Preferences->enableVsync;
if (displayHz + 5 < m_StreamConfig.fps) {
SDL_LogWarn(SDL_LOG_CATEGORY_APPLICATION,
"Disabling V-sync because refresh rate limit exceeded");
enableVsync = false;
}
// Choose a new decoder (hopefully the same one, but possibly
// not if a GPU was removed or something).
if (!chooseDecoder(m_Preferences->videoDecoderSelection,
m_Window, m_ActiveVideoFormat, m_ActiveVideoWidth,
m_ActiveVideoHeight, m_ActiveVideoFrameRate,
enableVsync,
enableVsync && m_Preferences->framePacing,
false,
s_ActiveSession->m_VideoDecoder)) {
SDL_AtomicUnlock(&m_DecoderLock);
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"Failed to recreate decoder after reset");
emit displayLaunchError("Unable to initialize video decoder. Please check your streaming settings and try again.");
goto DispatchDeferredCleanup;
}
}
// Request an IDR frame to complete the reset
m_NeedsIdr = true;
SDL_AtomicUnlock(&m_DecoderLock);
break;
case SDL_KEYUP:
case SDL_KEYDOWN:
m_InputHandler->handleKeyEvent(&event.key);
break;
case SDL_MOUSEBUTTONDOWN:
case SDL_MOUSEBUTTONUP:
m_InputHandler->handleMouseButtonEvent(&event.button);
break;
case SDL_MOUSEMOTION:
m_InputHandler->handleMouseMotionEvent(&event.motion);
break;
case SDL_MOUSEWHEEL:
m_InputHandler->handleMouseWheelEvent(&event.wheel);
break;
case SDL_CONTROLLERAXISMOTION:
m_InputHandler->handleControllerAxisEvent(&event.caxis);
break;
case SDL_CONTROLLERBUTTONDOWN:
case SDL_CONTROLLERBUTTONUP:
m_InputHandler->handleControllerButtonEvent(&event.cbutton);
break;
case SDL_CONTROLLERDEVICEADDED:
case SDL_CONTROLLERDEVICEREMOVED:
m_InputHandler->handleControllerDeviceEvent(&event.cdevice);
break;
case SDL_JOYDEVICEADDED:
m_InputHandler->handleJoystickArrivalEvent(&event.jdevice);
break;
// SDL2 sends touch events from trackpads by default on
// macOS. This totally screws our actual mouse handling,
// so we must explicitly ignore touch events on macOS.
#ifndef Q_OS_DARWIN
case SDL_FINGERDOWN:
case SDL_FINGERMOTION:
case SDL_FINGERUP:
m_InputHandler->handleTouchFingerEvent(&event.tfinger);
break;
#endif
}
}
DispatchDeferredCleanup:
// Uncapture the mouse and hide the window immediately,
// so we can return to the Qt GUI ASAP.
SDL_SetRelativeMouseMode(SDL_FALSE);
SDL_EnableScreenSaver();
SDL_SetHint(SDL_HINT_TIMER_RESOLUTION, "0");
// Raise any keys that are still down
m_InputHandler->raiseAllKeys();
// Destroy the decoder, since this must be done on the main thread
SDL_AtomicLock(&m_DecoderLock);
delete m_VideoDecoder;
m_VideoDecoder = nullptr;
SDL_AtomicUnlock(&m_DecoderLock);
// This must be called after the decoder is deleted, because
// the renderer may want to interact with the window
SDL_DestroyWindow(m_Window);
if (iconSurface != nullptr) {
SDL_FreeSurface(iconSurface);
}
SDL_QuitSubSystem(SDL_INIT_VIDEO);
SDL_assert(!SDL_WasInit(SDL_INIT_VIDEO));
// Cleanup can take a while, so dispatch it to a worker thread.
// When it is complete, it will release our s_ActiveSessionSemaphore
// reference.
QThreadPool::globalInstance()->start(new DeferredSessionCleanupTask(this));
}
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