commit d0566bc26fcf6ca396118701fa11900b627f2c09
author Mathias Agopian <mathias@google.com> Thu Nov 17 17:49:17 2011 -0800
committer Mathias Agopian <mathias@google.com> Tue Nov 29 13:10:25 2011 -0800
tree cf378f95fc318da496a13c35b74a6affb40a1ad1
parent 439cf8576d3b846c0aa0944d84372259bf075d51

Add support for sending VSYNC events to the framework

use gui/DisplayEvent to receive the events. Events are
dispatched through a unix pipe, so the API is compatible
with utils/Looper. see gui/DisplayEvent.h for more info.

Bug: 1475048
Change-Id: Ia720f64d1b950328b47b22c6a86042e481d35f09

services/surfaceflinger/DisplayHardware/DisplayHardware.h

diff --git a/services/surfaceflinger/DisplayHardware/DisplayHardware.h b/services/surfaceflinger/DisplayHardware/DisplayHardware.h
index f02c954..45d4b45 100644
--- a/services/surfaceflinger/DisplayHardware/DisplayHardware.h
+++ b/services/surfaceflinger/DisplayHardware/DisplayHardware.h
@@ -32,6 +32,7 @@
 #include "GLExtensions.h"
 
 #include "DisplayHardware/DisplayHardwareBase.h"
+#include "DisplayHardware/VSyncBarrier.h"
 
 namespace android {
 
@@ -74,6 +75,9 @@
     uint32_t    getMaxTextureSize() const;
     uint32_t    getMaxViewportDims() const;
 
+    // waits for the next vsync and returns the timestamp of when it happened
+    nsecs_t        waitForVSync() const;
+
     uint32_t getPageFlipCount() const;
     EGLDisplay getEGLDisplay() const { return mDisplay; }
 
@@ -95,6 +99,7 @@
 private:
     void init(uint32_t displayIndex) __attribute__((noinline));
     void fini() __attribute__((noinline));
+    int32_t getDelayToNextVSyncUs(nsecs_t* timestamp) const;
 
     sp<SurfaceFlinger> mFlinger;
     EGLDisplay      mDisplay;
@@ -112,7 +117,12 @@
     mutable uint32_t mPageFlipCount;
     GLint           mMaxViewportDims[2];
     GLint           mMaxTextureSize;
-    
+    VSyncBarrier    mVSync;
+
+    mutable Mutex   mFakeVSyncMutex;
+    mutable nsecs_t mNextFakeVSync;
+    nsecs_t         mRefreshPeriod;
+
     HWComposer*     mHwc;
 
     sp<FramebufferNativeWindow> mNativeWindow;