Squashed commit of the following:

commit f4edf442741886cdbe071e2d15f6e6247269f7c5
Author: Andreas Huber <andih@google.com>
Date:   Tue Mar 12 09:09:18 2013 -0700

    Pass additional flags to the sink, use TCP by default in wolfiecast mode.

    Change-Id: I41e11a2375d4199656e45c4f149d8441d0016092

commit 6302602ed280a38287f507159abfb40a1da38c5a
Author: Andreas Huber <andih@google.com>
Date:   Tue Mar 12 08:51:58 2013 -0700

    tweaks

    Change-Id: Ie29e422d7258be522f4bb1f6c5afcf74c937e547

commit a38a860e4979ba563cadbaafa21b084439449d26
Author: Andreas Huber <andih@google.com>
Date:   Mon Mar 11 16:57:43 2013 -0700

    Report average lateness all the way from NuPlayerRenderer...

    Change-Id: I2e7700703ae656515e44b9c25610d26c75778111

commit a7d49b11675ea88be4029dd8451d1649db94571d
Author: Andreas Huber <andih@google.com>
Date:   Mon Mar 11 14:54:19 2013 -0700

    Make TimeSyncer smarter, enable TunnelRenderer

    Change-Id: I27377a60cd8feb01589da456967fddd34532c20e

commit 0f214c8ef68179f7b61512c37040939554013151
Author: Andreas Huber <andih@google.com>
Date:   Thu Mar 7 15:57:56 2013 -0800

    convert source timestamps to sink timestamps, report lateness.

    Change-Id: I051a60fbbceca2f7b508ae3dac6e01e402bae39e

commit 04a4f8e16bad09157b5615a5fa45310438955832
Author: Andreas Huber <andih@google.com>
Date:   Thu Mar 7 09:00:28 2013 -0800

    Sync time between sink and source.

    Change-Id: Ie8b4d75c957aa48310e7c81d1279761b9f821efe

commit aebe20e6184e3636a99082f8ece08e708015cb8d
Author: Andreas Huber <andih@google.com>
Date:   Wed Mar 6 09:03:12 2013 -0800

    play with back pressure

    Change-Id: I51eb69257e6a79e76f5f9c75ff99d8adbd083947

Change-Id: Ifdf57228667fed7fc71c5090a2c3f7cea1037c5c

8 files changed, 68 insertions, 10 deletions

diff --git a/media/libstagefright/wifi-display/ANetworkSession.cpp b/media/libstagefright/wifi-display/ANetworkSession.cpp
index cb6011c..465f4c4 100644
--- a/media/libstagefright/wifi-display/ANetworkSession.cpp
+++ b/media/libstagefright/wifi-display/ANetworkSession.cpp
@@ -27,6 +27,7 @@
 #include <net/if.h>
 #include <netdb.h>
 #include <netinet/in.h>
+#include <sys/ioctl.h>
 #include <sys/socket.h>
 
 #include <media/stagefright/foundation/ABuffer.h>
@@ -507,6 +508,14 @@ status_t ANetworkSession::Session::writeMore() {
         mSawSendFailure = true;
     }
 
+#if 0
+    int numBytesQueued;
+    int res = ioctl(mSocket, SIOCOUTQ, &numBytesQueued);
+    if (res == 0 && numBytesQueued > 102400) {
+        ALOGI("numBytesQueued = %d", numBytesQueued);
+    }
+#endif
+
     return err;
 }
 
diff --git a/media/libstagefright/wifi-display/Android.mk b/media/libstagefright/wifi-display/Android.mk
index 19f560c..f81929c 100644
--- a/media/libstagefright/wifi-display/Android.mk
+++ b/media/libstagefright/wifi-display/Android.mk
@@ -15,6 +15,7 @@ LOCAL_SRC_FILES:= \
         sink/TunnelRenderer.cpp         \
         sink/WifiDisplaySink.cpp        \
         SNTPClient.cpp                  \
+        TimeSyncer.cpp                  \
         source/Converter.cpp            \
         source/MediaPuller.cpp          \
         source/PlaybackSession.cpp      \
diff --git a/media/libstagefright/wifi-display/rtp/RTPSender.cpp b/media/libstagefright/wifi-display/rtp/RTPSender.cpp
index 85c5933..b60853d 100644
--- a/media/libstagefright/wifi-display/rtp/RTPSender.cpp
+++ b/media/libstagefright/wifi-display/rtp/RTPSender.cpp
@@ -577,6 +577,8 @@ status_t RTPSender::onRTCPData(const sp<ABuffer> &buffer) {
 
             case 202:  // SDES
             case 203:
+                break;
+
             case 204:  // APP
                 break;
 
diff --git a/media/libstagefright/wifi-display/sink/TunnelRenderer.cpp b/media/libstagefright/wifi-display/sink/TunnelRenderer.cpp
index d9d8a76..6b185db 100644
--- a/media/libstagefright/wifi-display/sink/TunnelRenderer.cpp
+++ b/media/libstagefright/wifi-display/sink/TunnelRenderer.cpp
@@ -27,6 +27,7 @@
 #include <gui/SurfaceComposerClient.h>
 #include <media/IMediaPlayerService.h>
 #include <media/IStreamSource.h>
+#include <media/mediaplayer.h>
 #include <media/stagefright/foundation/ABuffer.h>
 #include <media/stagefright/foundation/ADebug.h>
 #include <media/stagefright/foundation/AMessage.h>
@@ -60,6 +61,8 @@ struct TunnelRenderer::StreamSource : public BnStreamSource {
 
     void doSomeWork();
 
+    void setTimeOffset(int64_t offset);
+
 protected:
     virtual ~StreamSource();
 
@@ -75,6 +78,9 @@ private:
 
     size_t mNumDeqeued;
 
+    int64_t mTimeOffsetUs;
+    bool mTimeOffsetChanged;
+
     DISALLOW_EVIL_CONSTRUCTORS(StreamSource);
 };
 
@@ -82,7 +88,9 @@ private:
 
 TunnelRenderer::StreamSource::StreamSource(TunnelRenderer *owner)
     : mOwner(owner),
-      mNumDeqeued(0) {
+      mNumDeqeued(0),
+      mTimeOffsetUs(0ll),
+      mTimeOffsetChanged(false) {
 }
 
 TunnelRenderer::StreamSource::~StreamSource() {
@@ -110,7 +118,7 @@ void TunnelRenderer::StreamSource::onBufferAvailable(size_t index) {
 }
 
 uint32_t TunnelRenderer::StreamSource::flags() const {
-    return kFlagAlignedVideoData;
+    return kFlagAlignedVideoData | kFlagIsRealTimeData;
 }
 
 void TunnelRenderer::StreamSource::doSomeWork() {
@@ -124,21 +132,21 @@ void TunnelRenderer::StreamSource::doSomeWork() {
 
         ++mNumDeqeued;
 
-        if (mNumDeqeued == 1) {
-            ALOGI("fixing real time now.");
-
+        if (mTimeOffsetChanged) {
             sp<AMessage> extra = new AMessage;
 
             extra->setInt32(
                     IStreamListener::kKeyDiscontinuityMask,
-                    ATSParser::DISCONTINUITY_ABSOLUTE_TIME);
+                    ATSParser::DISCONTINUITY_TIME_OFFSET);
 
-            extra->setInt64("timeUs", ALooper::GetNowUs());
+            extra->setInt64("offset", mTimeOffsetUs);
 
             mListener->issueCommand(
                     IStreamListener::DISCONTINUITY,
                     false /* synchronous */,
                     extra);
+
+            mTimeOffsetChanged = false;
         }
 
         ALOGV("dequeue TS packet of size %d", srcBuffer->size());
@@ -155,18 +163,32 @@ void TunnelRenderer::StreamSource::doSomeWork() {
     }
 }
 
+void TunnelRenderer::StreamSource::setTimeOffset(int64_t offset) {
+    Mutex::Autolock autoLock(mLock);
+
+    if (offset != mTimeOffsetUs) {
+        mTimeOffsetUs = offset;
+        mTimeOffsetChanged = true;
+    }
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 
 TunnelRenderer::TunnelRenderer(
         const sp<IGraphicBufferProducer> &bufferProducer)
     : mSurfaceTex(bufferProducer),
       mStartup(true) {
+    mStreamSource = new StreamSource(this);
 }
 
 TunnelRenderer::~TunnelRenderer() {
     destroyPlayer();
 }
 
+void TunnelRenderer::setTimeOffset(int64_t offset) {
+    mStreamSource->setTimeOffset(offset);
+}
+
 void TunnelRenderer::onMessageReceived(const sp<AMessage> &msg) {
     switch (msg->what()) {
         default:
@@ -209,8 +231,6 @@ void TunnelRenderer::initPlayer() {
     sp<IMediaPlayerService> service = interface_cast<IMediaPlayerService>(binder);
     CHECK(service.get() != NULL);
 
-    mStreamSource = new StreamSource(this);
-
     mPlayerClient = new PlayerClient;
 
     mPlayer = service->create(mPlayerClient, 0);
@@ -226,6 +246,8 @@ void TunnelRenderer::initPlayer() {
 void TunnelRenderer::destroyPlayer() {
     mStreamSource.clear();
 
+    mPlayer->setVideoSurfaceTexture(NULL);
+
     mPlayer->stop();
     mPlayer.clear();
 
diff --git a/media/libstagefright/wifi-display/sink/TunnelRenderer.h b/media/libstagefright/wifi-display/sink/TunnelRenderer.h
index 8e96665..479e73c 100644
--- a/media/libstagefright/wifi-display/sink/TunnelRenderer.h
+++ b/media/libstagefright/wifi-display/sink/TunnelRenderer.h
@@ -39,6 +39,12 @@ struct TunnelRenderer : public AHandler {
     void queueBuffer(const sp<ABuffer> &buffer);
     sp<ABuffer> dequeueBuffer();
 
+    void setTimeOffset(int64_t offset);
+
+    int64_t getAvgLatenessUs() {
+        return 0ll;
+    }
+
 protected:
     virtual void onMessageReceived(const sp<AMessage> &msg);
     virtual ~TunnelRenderer();
diff --git a/media/libstagefright/wifi-display/source/WifiDisplaySource.cpp b/media/libstagefright/wifi-display/source/WifiDisplaySource.cpp
index b8524f6..de66bde 100644
--- a/media/libstagefright/wifi-display/source/WifiDisplaySource.cpp
+++ b/media/libstagefright/wifi-display/source/WifiDisplaySource.cpp
@@ -23,6 +23,7 @@
 #include "Parameters.h"
 #include "ParsedMessage.h"
 #include "rtp/RTPSender.h"
+#include "TimeSyncer.h"
 
 #include <binder/IServiceManager.h>
 #include <gui/IGraphicBufferProducer.h>
@@ -157,6 +158,12 @@ void WifiDisplaySource::onMessageReceived(const sp<AMessage> &msg) {
             }
 
             if (err == OK) {
+                sp<AMessage> notify = new AMessage(kWhatTimeSyncerNotify, id());
+                mTimeSyncer = new TimeSyncer(mNetSession, notify);
+                looper()->registerHandler(mTimeSyncer);
+
+                mTimeSyncer->startServer(8123);
+
                 mState = AWAITING_CLIENT_CONNECTION;
             }
 
@@ -520,6 +527,11 @@ void WifiDisplaySource::onMessageReceived(const sp<AMessage> &msg) {
             break;
         }
 
+        case kWhatTimeSyncerNotify:
+        {
+            break;
+        }
+
         default:
             TRESPASS();
     }
diff --git a/media/libstagefright/wifi-display/source/WifiDisplaySource.h b/media/libstagefright/wifi-display/source/WifiDisplaySource.h
index 724462c..9e72682 100644
--- a/media/libstagefright/wifi-display/source/WifiDisplaySource.h
+++ b/media/libstagefright/wifi-display/source/WifiDisplaySource.h
@@ -30,6 +30,7 @@ namespace android {
 struct IHDCP;
 struct IRemoteDisplayClient;
 struct ParsedMessage;
+struct TimeSyncer;
 
 // Represents the RTSP server acting as a wifi display source.
 // Manages incoming connections, sets up Playback sessions as necessary.
@@ -81,6 +82,7 @@ private:
         kWhatHDCPNotify,
         kWhatFinishStop2,
         kWhatTeardownTriggerTimedOut,
+        kWhatTimeSyncerNotify,
     };
 
     struct ResponseID {
@@ -114,6 +116,7 @@ private:
     VideoFormats mSupportedSourceVideoFormats;
     sp<ANetworkSession> mNetSession;
     sp<IRemoteDisplayClient> mClient;
+    sp<TimeSyncer> mTimeSyncer;
     struct in_addr mInterfaceAddr;
     int32_t mSessionID;
 
diff --git a/media/libstagefright/wifi-display/wfd.cpp b/media/libstagefright/wifi-display/wfd.cpp
index 3f4216a..0b18484 100644
--- a/media/libstagefright/wifi-display/wfd.cpp
+++ b/media/libstagefright/wifi-display/wfd.cpp
@@ -321,7 +321,10 @@ int main(int argc, char **argv) {
     sp<ALooper> looper = new ALooper;
 
     sp<WifiDisplaySink> sink = new WifiDisplaySink(
-            session, surface->getIGraphicBufferProducer());
+            0 /* flags */,
+            session,
+            surface->getIGraphicBufferProducer());
+
     looper->registerHandler(sink);
 
     if (connectToPort >= 0) {