commit c5f94d8a4779050125145396ca83fbc862c7ed6b
author Eino-Ville Talvala <etalvala@google.com> Fri Feb 18 11:02:42 2011 -0800
committer Eino-Ville Talvala <etalvala@google.com> Thu Mar 17 13:10:03 2011 -0700
tree 83d016c9670032683faa39fda755b236a9010954
parent 262564df9613e8950fb3828ecc6dfffe79cc1b31

Add support for timestamps into SurfaceTexture.

API addition: The timestamps are represented as nanoseconds from some
arbitrary time point. Like the SurfaceTexture transform matrix, the
timestamp retrieved by getTimestamp is for the last frame sent to the
GL texture using updateTexImage().

Camera HAL change: Expect vendors to set these timestamps using
native_window_set_buffers_timestamp().  For now, they are
autogenerated by SurfaceTextureClient if set_buffers_timestamp() is
never called, but such timing is likely not accurate enough to pass a
CTS test.

bug:3300707

Change-Id: Ife131a0c2a826ac27342e11b8a6c42ff49e1bea7

libs/gui/SurfaceTexture.cpp

diff --git a/libs/gui/SurfaceTexture.cpp b/libs/gui/SurfaceTexture.cpp
index 5c6d71b..cdaca47 100644
--- a/libs/gui/SurfaceTexture.cpp
+++ b/libs/gui/SurfaceTexture.cpp
@@ -76,9 +76,15 @@
 static void mtxMul(float out[16], const float a[16], const float b[16]);
 
 SurfaceTexture::SurfaceTexture(GLuint tex) :
-    mBufferCount(MIN_BUFFER_SLOTS), mCurrentTexture(INVALID_BUFFER_SLOT),
-    mCurrentTransform(0), mLastQueued(INVALID_BUFFER_SLOT),
-    mLastQueuedTransform(0), mNextTransform(0), mTexName(tex) {
+    mBufferCount(MIN_BUFFER_SLOTS),
+    mCurrentTexture(INVALID_BUFFER_SLOT),
+    mCurrentTransform(0),
+    mCurrentTimestamp(0),
+    mLastQueued(INVALID_BUFFER_SLOT),
+    mLastQueuedTransform(0),
+    mLastQueuedTimestamp(0),
+    mNextTransform(0),
+    mTexName(tex) {
     LOGV("SurfaceTexture::SurfaceTexture");
     for (int i = 0; i < NUM_BUFFER_SLOTS; i++) {
         mSlots[i].mEglImage = EGL_NO_IMAGE_KHR;
@@ -153,7 +159,7 @@
     return OK;
 }
 
-status_t SurfaceTexture::queueBuffer(int buf) {
+status_t SurfaceTexture::queueBuffer(int buf, int64_t timestamp) {
     LOGV("SurfaceTexture::queueBuffer");
     Mutex::Autolock lock(mMutex);
     if (buf < 0 || mBufferCount <= buf) {
@@ -172,6 +178,7 @@
     mLastQueued = buf;
     mLastQueuedCrop = mNextCrop;
     mLastQueuedTransform = mNextTransform;
+    mLastQueuedTimestamp = timestamp;
     if (mFrameAvailableListener != 0) {
         mFrameAvailableListener->onFrameAvailable();
     }
@@ -246,12 +253,13 @@
         mCurrentTextureBuf = mSlots[mCurrentTexture].mGraphicBuffer;
         mCurrentCrop = mLastQueuedCrop;
         mCurrentTransform = mLastQueuedTransform;
+        mCurrentTimestamp = mLastQueuedTimestamp;
     }
     return OK;
 }
 
 void SurfaceTexture::getTransformMatrix(float mtx[16]) {
-    LOGV("SurfaceTexture::updateTexImage");
+    LOGV("SurfaceTexture::getTransformMatrix");
     Mutex::Autolock lock(mMutex);
 
     float xform[16];
@@ -342,6 +350,12 @@
     mtxMul(mtx, mtxFlipV, mtxBeforeFlipV);
 }
 
+nsecs_t SurfaceTexture::getTimestamp() {
+    LOGV("SurfaceTexture::getTimestamp");
+    Mutex::Autolock lock(mMutex);
+    return mCurrentTimestamp;
+}
+
 void SurfaceTexture::setFrameAvailableListener(
         const sp<FrameAvailableListener>& l) {
     LOGV("SurfaceTexture::setFrameAvailableListener");