Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
Fetching contributors…

Cannot retrieve contributors at this time

1380 lines (1173 sloc) 38.592 kb
/*
* Copyright (C) 2005-2012 Team XBMC
* http://www.xbmc.org
*
* This Program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This Program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with XBMC; see the file COPYING. If not, see
* <http://www.gnu.org/licenses/>.
*
*/
#include "system.h"
#include <list>
#include "utils/StdString.h"
#include "VideoReferenceClock.h"
#include "utils/MathUtils.h"
#include "utils/log.h"
#include "utils/TimeUtils.h"
#include "threads/SingleLock.h"
#if defined(HAS_GLX) && defined(HAS_XRANDR)
#include <sstream>
#include <X11/extensions/Xrandr.h>
#include "windowing/WindowingFactory.h"
#define NVSETTINGSCMD "nvidia-settings -nt -q RefreshRate3"
#elif defined(TARGET_DARWIN_OSX)
#include <QuartzCore/CVDisplayLink.h>
#include "CocoaInterface.h"
#elif defined(TARGET_DARWIN_IOS)
#include "windowing/WindowingFactory.h"
#elif defined(_WIN32) && defined(HAS_DX)
#pragma comment (lib,"d3d9.lib")
#if (D3DX_SDK_VERSION >= 42) //aug 2009 sdk and up there is no dxerr9 anymore
#include <Dxerr.h>
#pragma comment (lib,"DxErr.lib")
#else
#include <dxerr9.h>
#define DXGetErrorString(hr) DXGetErrorString9(hr)
#define DXGetErrorDescription(hr) DXGetErrorDescription9(hr)
#pragma comment (lib,"Dxerr9.lib")
#endif
#include "windowing/WindowingFactory.h"
#include "settings/AdvancedSettings.h"
#endif
using namespace std;
#if defined(_WIN32) && defined(HAS_DX)
void CD3DCallback::Reset()
{
m_devicevalid = true;
m_deviceused = false;
}
void CD3DCallback::OnDestroyDevice()
{
CSingleLock lock(m_critsection);
m_devicevalid = false;
while (m_deviceused)
{
lock.Leave();
m_releaseevent.Wait();
lock.Enter();
}
}
void CD3DCallback::OnCreateDevice()
{
CSingleLock lock(m_critsection);
m_devicevalid = true;
m_createevent.Set();
}
void CD3DCallback::Aquire()
{
CSingleLock lock(m_critsection);
while(!m_devicevalid)
{
lock.Leave();
m_createevent.Wait();
lock.Enter();
}
m_deviceused = true;
}
void CD3DCallback::Release()
{
CSingleLock lock(m_critsection);
m_deviceused = false;
m_releaseevent.Set();
}
bool CD3DCallback::IsValid()
{
return m_devicevalid;
}
#endif
CVideoReferenceClock::CVideoReferenceClock() : CThread("CVideoReferenceClock")
{
m_SystemFrequency = CurrentHostFrequency();
m_ClockSpeed = 1.0;
m_ClockOffset = 0;
m_TotalMissedVblanks = 0;
m_UseVblank = false;
m_Started.Reset();
m_CurrTime = 0;
m_LastIntTime = 0;
m_CurrTimeFract = 0.0;
m_LastRefreshTime = 0;
m_fineadjust = 0.0;
m_RefreshRate = 0;
m_PrevRefreshRate = 0;
m_MissedVblanks = 0;
m_RefreshChanged = 0;
m_VblankTime = 0;
#if defined(HAS_GLX) && defined(HAS_XRANDR)
m_glXWaitVideoSyncSGI = NULL;
m_glXGetVideoSyncSGI = NULL;
m_Dpy = NULL;
m_vInfo = NULL;
m_Window = 0;
m_Context = NULL;
m_pixmap = None;
m_glPixmap = None;
m_RREventBase = 0;
m_UseNvSettings = true;
m_bIsATI = false;
#endif
}
void CVideoReferenceClock::Process()
{
bool SetupSuccess = false;
int64_t Now;
#if defined(_WIN32) && defined(HAS_DX)
//register callback
m_D3dCallback.Reset();
g_Windowing.Register(&m_D3dCallback);
#endif
while(!m_bStop)
{
//set up the vblank clock
#if defined(HAS_GLX) && defined(HAS_XRANDR)
SetupSuccess = SetupGLX();
#elif defined(_WIN32) && defined(HAS_DX)
SetupSuccess = SetupD3D();
#elif defined(TARGET_DARWIN)
SetupSuccess = SetupCocoa();
#elif defined(HAS_GLX)
CLog::Log(LOGDEBUG, "CVideoReferenceClock: compiled without RandR support");
#elif defined(_WIN32)
CLog::Log(LOGDEBUG, "CVideoReferenceClock: only available on directx build");
#else
CLog::Log(LOGDEBUG, "CVideoReferenceClock: no implementation available");
#endif
CSingleLock SingleLock(m_CritSection);
Now = CurrentHostCounter();
m_CurrTime = Now + m_ClockOffset; //add the clock offset from the previous time we stopped
m_LastIntTime = m_CurrTime;
m_CurrTimeFract = 0.0;
m_ClockSpeed = 1.0;
m_TotalMissedVblanks = 0;
m_fineadjust = 1.0;
m_RefreshChanged = 0;
m_Started.Set();
if (SetupSuccess)
{
m_UseVblank = true; //tell other threads we're using vblank as clock
m_VblankTime = Now; //initialize the timestamp of the last vblank
SingleLock.Leave();
//run the clock
#if defined(HAS_GLX) && defined(HAS_XRANDR)
RunGLX();
#elif defined(_WIN32) && defined(HAS_DX)
RunD3D();
#elif defined(TARGET_DARWIN)
RunCocoa();
#endif
}
else
{
SingleLock.Leave();
CLog::Log(LOGDEBUG, "CVideoReferenceClock: Setup failed, falling back to CurrentHostCounter()");
}
SingleLock.Enter();
m_UseVblank = false; //we're back to using the systemclock
Now = CurrentHostCounter(); //set the clockoffset between the vblank clock and systemclock
m_ClockOffset = m_CurrTime - Now;
SingleLock.Leave();
//clean up the vblank clock
#if defined(HAS_GLX) && defined(HAS_XRANDR)
CleanupGLX();
#elif defined(_WIN32) && defined(HAS_DX)
CleanupD3D();
#elif defined(TARGET_DARWIN)
CleanupCocoa();
#endif
if (!SetupSuccess) break;
}
#if defined(_WIN32) && defined(HAS_DX)
g_Windowing.Unregister(&m_D3dCallback);
#endif
}
bool CVideoReferenceClock::WaitStarted(int MSecs)
{
//not waiting here can cause issues with alsa
return m_Started.WaitMSec(MSecs);
}
#if defined(HAS_GLX) && defined(HAS_XRANDR)
bool CVideoReferenceClock::SetupGLX()
{
int singleBufferAttributes[] = {
GLX_RGBA,
GLX_RED_SIZE, 0,
GLX_GREEN_SIZE, 0,
GLX_BLUE_SIZE, 0,
None
};
int ReturnV, SwaMask;
unsigned int GlxTest;
XSetWindowAttributes Swa;
m_vInfo = NULL;
m_Context = NULL;
m_Window = 0;
m_pixmap = None;
m_glPixmap = None;
CLog::Log(LOGDEBUG, "CVideoReferenceClock: Setting up GLX");
if (!m_Dpy)
{
m_Dpy = XOpenDisplay(NULL);
if (!m_Dpy)
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: Unable to open display");
return false;
}
}
if (!glXQueryExtension(m_Dpy, NULL, NULL))
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: X server does not support GLX");
return false;
}
bool ExtensionFound = false;
istringstream Extensions(glXQueryExtensionsString(m_Dpy, DefaultScreen(m_Dpy)));
string ExtensionStr;
while (!ExtensionFound)
{
Extensions >> ExtensionStr;
if (Extensions.fail())
break;
if (ExtensionStr == "GLX_SGI_video_sync")
ExtensionFound = true;
}
if (!ExtensionFound)
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: X server does not support GLX_SGI_video_sync");
return false;
}
CStdString Vendor = g_Windowing.GetRenderVendor();
Vendor.ToLower();
if (Vendor.compare(0, 3, "ati") == 0)
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: GL_VENDOR: %s, using ati workaround", Vendor.c_str());
m_bIsATI = true;
}
m_vInfo = glXChooseVisual(m_Dpy, DefaultScreen(m_Dpy), singleBufferAttributes);
if (!m_vInfo)
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: glXChooseVisual returned NULL");
return false;
}
if (!m_bIsATI)
{
Swa.border_pixel = 0;
Swa.event_mask = StructureNotifyMask;
Swa.colormap = XCreateColormap(m_Dpy, RootWindow(m_Dpy, m_vInfo->screen), m_vInfo->visual, AllocNone );
SwaMask = CWBorderPixel | CWColormap | CWEventMask;
m_Window = XCreateWindow(m_Dpy, RootWindow(m_Dpy, m_vInfo->screen), 0, 0, 256, 256, 0,
m_vInfo->depth, InputOutput, m_vInfo->visual, SwaMask, &Swa);
}
else
{
m_pixmap = XCreatePixmap(m_Dpy, DefaultRootWindow(m_Dpy), 256, 256, m_vInfo->depth);
if (!m_pixmap)
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: unable to create pixmap");
return false;
}
m_glPixmap = glXCreateGLXPixmap(m_Dpy, m_vInfo, m_pixmap);
}
m_Context = glXCreateContext(m_Dpy, m_vInfo, NULL, True);
if (!m_Context)
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: glXCreateContext returned NULL");
return false;
}
if (!m_bIsATI)
ReturnV = glXMakeCurrent(m_Dpy, m_Window, m_Context);
else
ReturnV = glXMakeCurrent(m_Dpy, m_glPixmap, m_Context);
if (ReturnV != True)
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: glXMakeCurrent returned %i", ReturnV);
return false;
}
if (!m_bIsATI)
{
m_glXWaitVideoSyncSGI = (int (*)(int, int, unsigned int*))glXGetProcAddress((const GLubyte*)"glXWaitVideoSyncSGI");
if (!m_glXWaitVideoSyncSGI)
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: glXWaitVideoSyncSGI not found");
return false;
}
ReturnV = m_glXWaitVideoSyncSGI(2, 0, &GlxTest);
if (ReturnV)
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: glXWaitVideoSyncSGI returned %i", ReturnV);
return false;
}
}
m_glXGetVideoSyncSGI = (int (*)(unsigned int*))glXGetProcAddress((const GLubyte*)"glXGetVideoSyncSGI");
if (!m_glXGetVideoSyncSGI)
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: glXGetVideoSyncSGI not found");
return false;
}
ReturnV = m_glXGetVideoSyncSGI(&GlxTest);
if (ReturnV)
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: glXGetVideoSyncSGI returned %i", ReturnV);
return false;
}
XRRSizes(m_Dpy, m_vInfo->screen, &ReturnV);
if (ReturnV == 0)
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: RandR not supported");
return false;
}
//set up receiving of RandR events, we'll get one when the refreshrate changes
XRRQueryExtension(m_Dpy, &m_RREventBase, &ReturnV);
XRRSelectInput(m_Dpy, RootWindow(m_Dpy, m_vInfo->screen), RRScreenChangeNotifyMask);
UpdateRefreshrate(true); //forced refreshrate update
m_MissedVblanks = 0;
return true;
}
bool CVideoReferenceClock::ParseNvSettings(int& RefreshRate)
{
double fRefreshRate;
char Buff[255];
int buffpos;
int ReturnV;
struct lconv *Locale = localeconv();
FILE* NvSettings;
int fd;
int64_t now;
const char* VendorPtr = (const char*)glGetString(GL_VENDOR);
if (!VendorPtr)
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: glGetString(GL_VENDOR) returned NULL, not using nvidia-settings");
return false;
}
CStdString Vendor = VendorPtr;
Vendor.ToLower();
if (Vendor.find("nvidia") == std::string::npos)
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: GL_VENDOR:%s, not using nvidia-settings", Vendor.c_str());
return false;
}
NvSettings = popen(NVSETTINGSCMD, "r");
if (!NvSettings)
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: %s: %s", NVSETTINGSCMD, strerror(errno));
return false;
}
fd = fileno(NvSettings);
if (fd == -1)
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: unable to get nvidia-settings file descriptor: %s", strerror(errno));
pclose(NvSettings);
return false;
}
now = CurrentHostCounter();
buffpos = 0;
while (CurrentHostCounter() - now < CurrentHostFrequency() * 5)
{
fd_set set;
FD_ZERO(&set);
FD_SET(fd, &set);
struct timeval timeout = {1, 0};
ReturnV = select(fd + 1, &set, NULL, NULL, &timeout);
if (ReturnV == -1)
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: select failed on %s: %s", NVSETTINGSCMD, strerror(errno));
pclose(NvSettings);
return false;
}
else if (FD_ISSET(fd, &set))
{
ReturnV = read(fd, Buff + buffpos, (int)sizeof(Buff) - buffpos);
if (ReturnV == -1)
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: read failed on %s: %s", NVSETTINGSCMD, strerror(errno));
pclose(NvSettings);
return false;
}
else if (ReturnV > 0)
{
buffpos += ReturnV;
if (buffpos >= (int)sizeof(Buff) - 1)
break;
}
else
{
break;
}
}
}
if (buffpos <= 0)
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: %s produced no output", NVSETTINGSCMD);
//calling pclose() here might hang
//what should be done instead is fork, call nvidia-settings
//then kill the process if it hangs
return false;
}
else if (buffpos > (int)sizeof(Buff) - 1)
{
buffpos = sizeof(Buff) - 1;
pclose(NvSettings);
}
Buff[buffpos] = 0;
CLog::Log(LOGDEBUG, "CVideoReferenceClock: output of %s: %s", NVSETTINGSCMD, Buff);
if (!strchr(Buff, '\n'))
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: %s incomplete output (no newline)", NVSETTINGSCMD);
return false;
}
for (int i = 0; i < buffpos; i++)
{
//workaround for locale mismatch
if (Buff[i] == '.' || Buff[i] == ',')
Buff[i] = *Locale->decimal_point;
}
ReturnV = sscanf(Buff, "%lf", &fRefreshRate);
if (ReturnV != 1 || fRefreshRate <= 0.0)
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: can't make sense of that");
return false;
}
RefreshRate = MathUtils::round_int(fRefreshRate);
CLog::Log(LOGDEBUG, "CVideoReferenceClock: Detected refreshrate by nvidia-settings: %f hertz, rounding to %i hertz",
fRefreshRate, RefreshRate);
return true;
}
int CVideoReferenceClock::GetRandRRate()
{
int RefreshRate;
XRRScreenConfiguration *CurrInfo;
CurrInfo = XRRGetScreenInfo(m_Dpy, RootWindow(m_Dpy, m_vInfo->screen));
RefreshRate = XRRConfigCurrentRate(CurrInfo);
XRRFreeScreenConfigInfo(CurrInfo);
return RefreshRate;
}
void CVideoReferenceClock::CleanupGLX()
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: Cleaning up GLX");
if (m_vInfo)
{
XFree(m_vInfo);
m_vInfo = NULL;
}
if (m_Context)
{
glXMakeCurrent(m_Dpy, None, NULL);
glXDestroyContext(m_Dpy, m_Context);
m_Context = NULL;
}
if (m_Window)
{
XDestroyWindow(m_Dpy, m_Window);
m_Window = 0;
}
if (m_glPixmap)
{
glXDestroyPixmap(m_Dpy, m_glPixmap);
m_glPixmap = None;
}
if (m_pixmap)
{
XFreePixmap(m_Dpy, m_pixmap);
m_pixmap = None;
}
//ati saves the Display* in their libGL, if we close it here, we crash
if (m_Dpy && !m_bIsATI)
{
XCloseDisplay(m_Dpy);
m_Dpy = NULL;
}
}
void CVideoReferenceClock::RunGLX()
{
unsigned int PrevVblankCount;
unsigned int VblankCount;
int ReturnV;
bool IsReset = false;
int64_t Now;
CSingleLock SingleLock(m_CritSection);
SingleLock.Leave();
//get the current vblank counter
m_glXGetVideoSyncSGI(&VblankCount);
PrevVblankCount = VblankCount;
uint64_t lastVblankTime = CurrentHostCounter();
int sleepTime, correction;
int integral = 0;
while(!m_bStop)
{
//wait for the next vblank
if (!m_bIsATI)
{
ReturnV = m_glXWaitVideoSyncSGI(2, (VblankCount + 1) % 2, &VblankCount);
m_glXGetVideoSyncSGI(&VblankCount); //the vblank count returned by glXWaitVideoSyncSGI is not always correct
}
else
{
// calculate sleep time in micro secs
// we start with 50% of interval
sleepTime = 500000LL / m_RefreshRate;
// correct sleepTime by time used for processing since last vblank
correction = (CurrentHostCounter() - lastVblankTime) * 1000000LL / m_SystemFrequency;
sleepTime -= correction;
// correct sleep time by integral term
// consider 10 cycles as desired
sleepTime += integral;
// clamp sleepTime to a min value of 30% of interval
// integral is already clamped to a max value
sleepTime = std::max(int(300000LL/m_RefreshRate), sleepTime);
unsigned int iterations = 0;
while (VblankCount == PrevVblankCount && !m_bStop)
{
usleep(sleepTime);
m_glXGetVideoSyncSGI(&VblankCount);
sleepTime = sleepTime > 200 ? sleepTime/2 : 100;
iterations++;
}
if (iterations > 10)
integral += 100;
else if (iterations < 10)
integral -= 100;
// clamp integral to an absolute value of 20% of interval
if (integral > 200000LL/m_RefreshRate)
integral = 200000LL/m_RefreshRate;
else if (integral < -200000LL/m_RefreshRate)
integral = -200000LL/m_RefreshRate;
lastVblankTime = CurrentHostCounter();
ReturnV = 0;
}
Now = CurrentHostCounter(); //get the timestamp of this vblank
if(ReturnV)
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: glXWaitVideoSyncSGI returned %i", ReturnV);
return;
}
if (VblankCount > PrevVblankCount)
{
//update the vblank timestamp, update the clock and send a signal that we got a vblank
SingleLock.Enter();
m_VblankTime = Now;
UpdateClock((int)(VblankCount - PrevVblankCount), true);
SingleLock.Leave();
SendVblankSignal();
UpdateRefreshrate();
IsReset = false;
}
else if (!m_bStop)
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: Vblank counter has reset");
integral = 0;
//only try reattaching once
if (IsReset)
return;
//because of a bug in the nvidia driver, glXWaitVideoSyncSGI breaks when the vblank counter resets
CLog::Log(LOGDEBUG, "CVideoReferenceClock: Detaching glX context");
ReturnV = glXMakeCurrent(m_Dpy, None, NULL);
if (ReturnV != True)
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: glXMakeCurrent returned %i", ReturnV);
return;
}
//sleep here so we don't busy spin when this constantly happens, for example when the display went to sleep
Sleep(1000);
CLog::Log(LOGDEBUG, "CVideoReferenceClock: Attaching glX context");
if (!m_bIsATI)
ReturnV = glXMakeCurrent(m_Dpy, m_Window, m_Context);
else
ReturnV = glXMakeCurrent(m_Dpy, m_glPixmap, m_Context);
if (ReturnV != True)
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: glXMakeCurrent returned %i", ReturnV);
return;
}
m_glXGetVideoSyncSGI(&VblankCount);
IsReset = true;
}
PrevVblankCount = VblankCount;
}
}
#elif defined(_WIN32) && defined(HAS_DX)
void CVideoReferenceClock::RunD3D()
{
D3DRASTER_STATUS RasterStatus;
int64_t Now;
int64_t LastVBlankTime;
unsigned int LastLine;
int NrVBlanks;
double VBlankTime;
int ReturnV;
CSingleLock SingleLock(m_CritSection);
SingleLock.Leave();
//get the scanline we're currently at
m_D3dDev->GetRasterStatus(0, &RasterStatus);
if (RasterStatus.InVBlank) LastLine = 0;
else LastLine = RasterStatus.ScanLine;
//init the vblanktime
Now = CurrentHostCounter();
LastVBlankTime = Now;
while(!m_bStop && m_D3dCallback.IsValid())
{
//get the scanline we're currently at
ReturnV = m_D3dDev->GetRasterStatus(0, &RasterStatus);
if (ReturnV != D3D_OK)
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: GetRasterStatus returned returned %s: %s",
DXGetErrorString(ReturnV), DXGetErrorDescription(ReturnV));
return;
}
//if InVBlank is set, or the current scanline is lower than the previous scanline, a vblank happened
if ((RasterStatus.InVBlank && LastLine > 0) || (RasterStatus.ScanLine < LastLine))
{
//calculate how many vblanks happened
Now = CurrentHostCounter();
VBlankTime = (double)(Now - LastVBlankTime) / (double)m_SystemFrequency;
NrVBlanks = MathUtils::round_int(VBlankTime * (double)m_RefreshRate);
//update the vblank timestamp, update the clock and send a signal that we got a vblank
SingleLock.Enter();
m_VblankTime = Now;
UpdateClock(NrVBlanks, true);
SingleLock.Leave();
SendVblankSignal();
if (UpdateRefreshrate())
{
//we have to measure the refreshrate again
CLog::Log(LOGDEBUG, "CVideoReferenceClock: Displaymode changed");
return;
}
//save the timestamp of this vblank so we can calculate how many vblanks happened next time
LastVBlankTime = Now;
//because we had a vblank, sleep until half the refreshrate period
Now = CurrentHostCounter();
int SleepTime = (int)((LastVBlankTime + (m_SystemFrequency / m_RefreshRate / 2) - Now) * 1000 / m_SystemFrequency);
if (SleepTime > 100) SleepTime = 100; //failsafe
if (SleepTime > 0) ::Sleep(SleepTime);
}
else
{
::Sleep(1);
}
if (RasterStatus.InVBlank) LastLine = 0;
else LastLine = RasterStatus.ScanLine;
}
}
//how many times we measure the refreshrate
#define NRMEASURES 6
//how long to measure in milliseconds
#define MEASURETIME 250
bool CVideoReferenceClock::SetupD3D()
{
int ReturnV;
CLog::Log(LOGDEBUG, "CVideoReferenceClock: Setting up Direct3d");
m_D3dCallback.Aquire();
//get d3d device
m_D3dDev = g_Windowing.Get3DDevice();
//we need a high priority thread to get accurate timing
if (!SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_TIME_CRITICAL))
CLog::Log(LOGDEBUG, "CVideoReferenceClock: SetThreadPriority failed");
D3DCAPS9 DevCaps;
ReturnV = m_D3dDev->GetDeviceCaps(&DevCaps);
if (ReturnV != D3D_OK)
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: GetDeviceCaps returned %s: %s",
DXGetErrorString(ReturnV), DXGetErrorDescription(ReturnV));
return false;
}
if ((DevCaps.Caps & D3DCAPS_READ_SCANLINE) != D3DCAPS_READ_SCANLINE)
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: Hardware does not support GetRasterStatus");
return false;
}
D3DRASTER_STATUS RasterStatus;
ReturnV = m_D3dDev->GetRasterStatus(0, &RasterStatus);
if (ReturnV != D3D_OK)
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: GetRasterStatus returned returned %s: %s",
DXGetErrorString(ReturnV), DXGetErrorDescription(ReturnV));
return false;
}
D3DDISPLAYMODE DisplayMode;
ReturnV = m_D3dDev->GetDisplayMode(0, &DisplayMode);
if (ReturnV != D3D_OK)
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: GetDisplayMode returned returned %s: %s",
DXGetErrorString(ReturnV), DXGetErrorDescription(ReturnV));
return false;
}
//forced update of windows refreshrate
UpdateRefreshrate(true);
if (g_advancedSettings.m_measureRefreshrate)
{
//measure the refreshrate a couple times
list<double> Measures;
for (int i = 0; i < NRMEASURES; i++)
Measures.push_back(MeasureRefreshrate(MEASURETIME));
//build up a string of measured rates
CStdString StrRates;
for (list<double>::iterator it = Measures.begin(); it != Measures.end(); it++)
StrRates.AppendFormat("%.2f ", *it);
//get the top half of the measured rates
Measures.sort();
double RefreshRate = 0.0;
int NrMeasurements = 0;
while (NrMeasurements < NRMEASURES / 2 && !Measures.empty())
{
if (Measures.back() > 0.0)
{
RefreshRate += Measures.back();
NrMeasurements++;
}
Measures.pop_back();
}
if (NrMeasurements < NRMEASURES / 2)
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: refreshrate measurements: %s, unable to get a good measurement",
StrRates.c_str(), m_RefreshRate);
return false;
}
RefreshRate /= NrMeasurements;
m_RefreshRate = MathUtils::round_int(RefreshRate);
CLog::Log(LOGDEBUG, "CVideoReferenceClock: refreshrate measurements: %s, assuming %i hertz", StrRates.c_str(), m_RefreshRate);
}
else
{
m_RefreshRate = m_PrevRefreshRate;
if (m_RefreshRate == 23 || m_RefreshRate == 29 || m_RefreshRate == 59)
m_RefreshRate++;
if (m_Interlaced)
{
m_RefreshRate *= 2;
CLog::Log(LOGDEBUG, "CVideoReferenceClock: display is interlaced");
}
CLog::Log(LOGDEBUG, "CVideoReferenceClock: detected refreshrate: %i hertz, assuming %i hertz", m_PrevRefreshRate, (int)m_RefreshRate);
}
m_MissedVblanks = 0;
return true;
}
double CVideoReferenceClock::MeasureRefreshrate(int MSecs)
{
D3DRASTER_STATUS RasterStatus;
int64_t Now;
int64_t Target;
int64_t Prev;
int64_t AvgInterval;
int64_t MeasureCount;
unsigned int LastLine;
int ReturnV;
Now = CurrentHostCounter();
Target = Now + (m_SystemFrequency * MSecs / 1000);
Prev = -1;
AvgInterval = 0;
MeasureCount = 0;
//start measuring vblanks
LastLine = 0;
while(Now <= Target)
{
ReturnV = m_D3dDev->GetRasterStatus(0, &RasterStatus);
Now = CurrentHostCounter();
if (ReturnV != D3D_OK)
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: GetRasterStatus returned returned %s: %s",
DXGetErrorString(ReturnV), DXGetErrorDescription(ReturnV));
return -1.0;
}
if ((RasterStatus.InVBlank && LastLine != 0) || (!RasterStatus.InVBlank && RasterStatus.ScanLine < LastLine))
{ //we got a vblank
if (Prev != -1) //need two for a measurement
{
AvgInterval += Now - Prev; //save how long this vblank lasted
MeasureCount++;
}
Prev = Now; //save this time for the next measurement
}
//save the current scanline
if (RasterStatus.InVBlank)
LastLine = 0;
else
LastLine = RasterStatus.ScanLine;
::Sleep(1);
}
if (MeasureCount < 1)
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: Didn't measure any vblanks");
return -1.0;
}
double fRefreshRate = 1.0 / ((double)AvgInterval / (double)MeasureCount / (double)m_SystemFrequency);
return fRefreshRate;
}
void CVideoReferenceClock::CleanupD3D()
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: Cleaning up Direct3d");
m_D3dCallback.Release();
}
#elif defined(TARGET_DARWIN)
#if defined(TARGET_DARWIN_OSX)
// Called by the Core Video Display Link whenever it's appropriate to render a frame.
static CVReturn DisplayLinkCallBack(CVDisplayLinkRef displayLink, const CVTimeStamp* inNow, const CVTimeStamp* inOutputTime, CVOptionFlags flagsIn, CVOptionFlags* flagsOut, void* displayLinkContext)
{
double fps = 60.0;
if (inNow->videoRefreshPeriod > 0)
fps = (double)inOutputTime->videoTimeScale / (double)inOutputTime->videoRefreshPeriod;
// Create an autorelease pool (necessary to call into non-Obj-C code from Obj-C code)
void* pool = Cocoa_Create_AutoReleasePool();
CVideoReferenceClock *VideoReferenceClock = reinterpret_cast<CVideoReferenceClock*>(displayLinkContext);
VideoReferenceClock->VblankHandler(inNow->hostTime, fps);
// Destroy the autorelease pool
Cocoa_Destroy_AutoReleasePool(pool);
return kCVReturnSuccess;
}
#endif
bool CVideoReferenceClock::SetupCocoa()
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: setting up Cocoa");
//init the vblank timestamp
m_LastVBlankTime = CurrentHostCounter();
m_MissedVblanks = 0;
m_RefreshRate = 60; //init the refreshrate so we don't get any division by 0 errors
#if defined(TARGET_DARWIN_IOS)
{
g_Windowing.InitDisplayLink();
}
#else
if (!Cocoa_CVDisplayLinkCreate((void*)DisplayLinkCallBack, reinterpret_cast<void*>(this)))
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: Cocoa_CVDisplayLinkCreate failed");
return false;
}
else
#endif
{
UpdateRefreshrate(true);
return true;
}
}
void CVideoReferenceClock::RunCocoa()
{
//because cocoa has a vblank callback, we just keep sleeping until we're asked to stop the thread
while(!m_bStop)
{
Sleep(1000);
}
}
void CVideoReferenceClock::CleanupCocoa()
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: cleaning up Cocoa");
#if defined(TARGET_DARWIN_IOS)
g_Windowing.DeinitDisplayLink();
#else
Cocoa_CVDisplayLinkRelease();
#endif
}
void CVideoReferenceClock::VblankHandler(int64_t nowtime, double fps)
{
int NrVBlanks;
double VBlankTime;
int RefreshRate = MathUtils::round_int(fps);
CSingleLock SingleLock(m_CritSection);
if (RefreshRate != m_RefreshRate)
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: Detected refreshrate: %f hertz, rounding to %i hertz", fps, RefreshRate);
m_RefreshRate = RefreshRate;
}
m_LastRefreshTime = m_CurrTime;
//calculate how many vblanks happened
VBlankTime = (double)(nowtime - m_LastVBlankTime) / (double)m_SystemFrequency;
NrVBlanks = MathUtils::round_int(VBlankTime * (double)m_RefreshRate);
//save the timestamp of this vblank so we can calculate how many happened next time
m_LastVBlankTime = nowtime;
//update the vblank timestamp, update the clock and send a signal that we got a vblank
m_VblankTime = nowtime;
UpdateClock(NrVBlanks, true);
SingleLock.Leave();
SendVblankSignal();
UpdateRefreshrate();
}
#endif
//this is called from the vblank run function and from CVideoReferenceClock::Wait in case of a late update
void CVideoReferenceClock::UpdateClock(int NrVBlanks, bool CheckMissed)
{
if (CheckMissed) //set to true from the vblank run function, set to false from Wait and GetTime
{
if (NrVBlanks < m_MissedVblanks) //if this is true the vblank detection in the run function is wrong
CLog::Log(LOGDEBUG, "CVideoReferenceClock: detected %i vblanks, missed %i, refreshrate might have changed",
NrVBlanks, m_MissedVblanks);
NrVBlanks -= m_MissedVblanks; //subtract the vblanks we missed
m_MissedVblanks = 0;
}
else
{
m_MissedVblanks += NrVBlanks; //tell the vblank clock how many vblanks it missed
m_TotalMissedVblanks += NrVBlanks; //for the codec information screen
m_VblankTime += m_SystemFrequency * (int64_t)NrVBlanks / m_RefreshRate; //set the vblank time forward
}
if (NrVBlanks > 0) //update the clock with the adjusted frequency if we have any vblanks
{
double increment = UpdateInterval() * NrVBlanks;
double integer = floor(increment);
m_CurrTime += (int64_t)(integer + 0.5); //make sure it gets correctly converted to int
//accumulate what we lost due to rounding in m_CurrTimeFract, then add the integer part of that to m_CurrTime
m_CurrTimeFract += increment - integer;
integer = floor(m_CurrTimeFract);
m_CurrTime += (int64_t)(integer + 0.5);
m_CurrTimeFract -= integer;
}
}
double CVideoReferenceClock::UpdateInterval()
{
return m_ClockSpeed * m_fineadjust / (double)m_RefreshRate * (double)m_SystemFrequency;
}
//called from dvdclock to get the time
int64_t CVideoReferenceClock::GetTime(bool interpolated /* = true*/)
{
CSingleLock SingleLock(m_CritSection);
//when using vblank, get the time from that, otherwise use the systemclock
if (m_UseVblank)
{
int64_t NextVblank;
int64_t Now;
Now = CurrentHostCounter(); //get current system time
NextVblank = TimeOfNextVblank(); //get time when the next vblank should happen
while(Now >= NextVblank) //keep looping until the next vblank is in the future
{
UpdateClock(1, false); //update clock when next vblank should have happened already
NextVblank = TimeOfNextVblank(); //get time when the next vblank should happen
}
if (interpolated)
{
//interpolate from the last time the clock was updated
double elapsed = (double)(Now - m_VblankTime) * m_ClockSpeed * m_fineadjust;
//don't interpolate more than 2 vblank periods
elapsed = min(elapsed, UpdateInterval() * 2.0);
//make sure the clock doesn't go backwards
int64_t intTime = m_CurrTime + (int64_t)elapsed;
if (intTime > m_LastIntTime)
m_LastIntTime = intTime;
return m_LastIntTime;
}
else
{
return m_CurrTime;
}
}
else
{
return CurrentHostCounter() + m_ClockOffset;
}
}
//called from dvdclock to get the clock frequency
int64_t CVideoReferenceClock::GetFrequency()
{
return m_SystemFrequency;
}
void CVideoReferenceClock::SetSpeed(double Speed)
{
CSingleLock SingleLock(m_CritSection);
//dvdplayer can change the speed to fit the rereshrate
if (m_UseVblank)
{
if (Speed != m_ClockSpeed)
{
m_ClockSpeed = Speed;
CLog::Log(LOGDEBUG, "CVideoReferenceClock: Clock speed %f%%", GetSpeed() * 100.0);
}
}
}
double CVideoReferenceClock::GetSpeed()
{
CSingleLock SingleLock(m_CritSection);
//dvdplayer needs to know the speed for the resampler
if (m_UseVblank)
return m_ClockSpeed;
else
return 1.0;
}
bool CVideoReferenceClock::UpdateRefreshrate(bool Forced /*= false*/)
{
//if the graphicscontext signaled that the refreshrate changed, we check it about one second later
if (m_RefreshChanged == 1 && !Forced)
{
m_LastRefreshTime = m_CurrTime;
m_RefreshChanged = 2;
return false;
}
//update the refreshrate about once a second, or update immediately if a forced update is required
if (m_CurrTime - m_LastRefreshTime < m_SystemFrequency && !Forced)
return false;
if (Forced)
m_LastRefreshTime = 0;
else
m_LastRefreshTime = m_CurrTime;
#if defined(HAS_GLX) && defined(HAS_XRANDR)
//check for RandR events
bool GotEvent = Forced || m_RefreshChanged == 2;
XEvent Event;
while (XCheckTypedEvent(m_Dpy, m_RREventBase + RRScreenChangeNotify, &Event))
{
if (Event.type == m_RREventBase + RRScreenChangeNotify)
{
CLog::Log(LOGDEBUG, "CVideoReferenceClock: Received RandR event %i", Event.type);
GotEvent = true;
}
XRRUpdateConfiguration(&Event);
}
if (!Forced)
m_RefreshChanged = 0;
if (!GotEvent) //refreshrate did not change
return false;
//the refreshrate can be wrong on nvidia drivers, so read it from nvidia-settings when it's available
if (m_UseNvSettings)
{
int NvRefreshRate;
//if this fails we can't get the refreshrate from nvidia-settings
m_UseNvSettings = ParseNvSettings(NvRefreshRate);
if (m_UseNvSettings)
{
CSingleLock SingleLock(m_CritSection);
m_RefreshRate = NvRefreshRate;
return true;
}
CLog::Log(LOGDEBUG, "CVideoReferenceClock: Using RandR for refreshrate detection");
}
CSingleLock SingleLock(m_CritSection);
m_RefreshRate = GetRandRRate();
CLog::Log(LOGDEBUG, "CVideoReferenceClock: Detected refreshrate: %i hertz", (int)m_RefreshRate);
return true;
#elif defined(_WIN32) && defined(HAS_DX)
D3DDISPLAYMODE DisplayMode;
m_D3dDev->GetDisplayMode(0, &DisplayMode);
//0 indicates adapter default
if (DisplayMode.RefreshRate == 0)
DisplayMode.RefreshRate = 60;
if (m_PrevRefreshRate != DisplayMode.RefreshRate || m_Width != DisplayMode.Width || m_Height != DisplayMode.Height ||
m_Interlaced != g_Windowing.Interlaced() || Forced )
{
m_PrevRefreshRate = DisplayMode.RefreshRate;
m_Width = DisplayMode.Width;
m_Height = DisplayMode.Height;
m_Interlaced = g_Windowing.Interlaced();
return true;
}
return false;
#elif defined(TARGET_DARWIN)
#if defined(TARGET_DARWIN_IOS)
int RefreshRate = round(g_Windowing.GetDisplayLinkFPS() + 0.5);
#else
int RefreshRate = MathUtils::round_int(Cocoa_GetCVDisplayLinkRefreshPeriod());
#endif
if (RefreshRate != m_RefreshRate || Forced)
{
CSingleLock SingleLock(m_CritSection);
CLog::Log(LOGDEBUG, "CVideoReferenceClock: Detected refreshrate: %i hertz", RefreshRate);
m_RefreshRate = RefreshRate;
return true;
}
return false;
#endif
return false;
}
//dvdplayer needs to know the refreshrate for matching the fps of the video playing to it
int CVideoReferenceClock::GetRefreshRate(double* interval /*= NULL*/)
{
CSingleLock SingleLock(m_CritSection);
if (m_UseVblank)
{
if (interval)
*interval = m_ClockSpeed / m_RefreshRate;
return (int)m_RefreshRate;
}
else
return -1;
}
//this is called from CDVDClock::WaitAbsoluteClock, which is called from CXBMCRenderManager::WaitPresentTime
//it waits until a certain timestamp has passed, used for displaying videoframes at the correct moment
int64_t CVideoReferenceClock::Wait(int64_t Target)
{
int64_t Now;
int SleepTime;
CSingleLock SingleLock(m_CritSection);
if (m_UseVblank) //when true the vblank is used as clock source
{
while (m_CurrTime < Target)
{
//calculate how long to sleep before we should have gotten a signal that a vblank happened
Now = CurrentHostCounter();
int64_t NextVblank = TimeOfNextVblank();
SleepTime = (int)((NextVblank - Now) * 1000 / m_SystemFrequency);
int64_t CurrTime = m_CurrTime; //save current value of the clock
bool Late = false;
if (SleepTime <= 0) //if sleeptime is 0 or lower, the vblank clock is already late in updating
{
Late = true;
}
else
{
m_VblankEvent.Reset();
SingleLock.Leave();
if (!m_VblankEvent.WaitMSec(SleepTime)) //if this returns false, it means the vblank event was not set within
Late = true; //the required time
SingleLock.Enter();
}
//if the vblank clock was late with its update, we update the clock ourselves
if (Late && CurrTime == m_CurrTime)
UpdateClock(1, false); //update the clock by 1 vblank
}
return m_CurrTime;
}
else
{
int64_t ClockOffset = m_ClockOffset;
SingleLock.Leave();
Now = CurrentHostCounter();
//sleep until the timestamp has passed
SleepTime = (int)((Target - (Now + ClockOffset)) * 1000 / m_SystemFrequency);
if (SleepTime > 0)
::Sleep(SleepTime);
Now = CurrentHostCounter();
return Now + ClockOffset;
}
}
void CVideoReferenceClock::SendVblankSignal()
{
m_VblankEvent.Set();
}
#define MAXVBLANKDELAY 13LL
//guess when the next vblank should happen,
//based on the refreshrate and when the previous one happened
//increase that by 30% to allow for errors
int64_t CVideoReferenceClock::TimeOfNextVblank()
{
return m_VblankTime + (m_SystemFrequency / m_RefreshRate * MAXVBLANKDELAY / 10LL);
}
//for the codec information screen
bool CVideoReferenceClock::GetClockInfo(int& MissedVblanks, double& ClockSpeed, int& RefreshRate)
{
if (m_UseVblank)
{
MissedVblanks = m_TotalMissedVblanks;
ClockSpeed = m_ClockSpeed * 100.0;
RefreshRate = (int)m_RefreshRate;
return true;
}
return false;
}
void CVideoReferenceClock::SetFineAdjust(double fineadjust)
{
CSingleLock SingleLock(m_CritSection);
m_fineadjust = fineadjust;
}
CVideoReferenceClock g_VideoReferenceClock;
Jump to Line
Something went wrong with that request. Please try again.