AppRTCDemo(android): support app (UI) & capture rotation.

Now app UI rotates as the device orientation changes, and the captured stream
tries to maintain real-world-up, matching Chrome/Android and Hangouts/Android
behavior.

BUG=2432
R=glaznev@webrtc.org, henrike@webrtc.org, wu@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/15689005

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6354 4adac7df-926f-26a2-2b94-8c16560cd09d

talk/app/webrtc/java/jni/peerconnection_jni.cc

@@ -1897,7 +1897,7 @@ JOW(jboolean, PeerConnectionFactory_initializeAndroidGlobals)(
   CHECK(g_jvm, "JNI_OnLoad failed to run?");
   bool failure = false;
   if (initialize_video)
-    failure |= webrtc::VideoEngine::SetAndroidObjects(g_jvm);
+    failure |= webrtc::VideoEngine::SetAndroidObjects(g_jvm, context);
   if (initialize_audio)
     failure |= webrtc::VoiceEngine::SetAndroidObjects(g_jvm, jni, context);
   return !failure;

talk/examples/android/AndroidManifest.xml

@@ -21,7 +21,8 @@
                android:allowBackup="false">
     <activity android:name="AppRTCDemoActivity"
               android:label="@string/app_name"
-              android:screenOrientation="landscape"
+              android:screenOrientation="fullUser"
+              android:configChanges="orientation|screenSize"
               android:theme="@android:style/Theme.Black.NoTitleBar.Fullscreen">
       <intent-filter>
         <action android:name="android.intent.action.MAIN" />

talk/examples/android/src/org/appspot/apprtc/AppRTCDemoActivity.java

@@ -31,6 +31,7 @@ import android.app.Activity;
 import android.app.AlertDialog;
 import android.content.DialogInterface;
 import android.content.Intent;
+import android.content.res.Configuration;
 import android.graphics.Color;
 import android.graphics.Point;
 import android.media.AudioManager;
@@ -226,6 +227,13 @@ public class AppRTCDemoActivity extends Activity
     }
   }
 
+  @Override
+  public void onConfigurationChanged (Configuration newConfig) {
+    Point displaySize = new Point();
+    getWindowManager().getDefaultDisplay().getSize(displaySize);
+    vsv.updateDisplaySize(displaySize);
+    super.onConfigurationChanged(newConfig);
+  }
 
   // Just for fun (and to regression-test bug 2302) make sure that DataChannels
   // can be created, queried, and disposed.

talk/examples/android/src/org/appspot/apprtc/VideoStreamsView.java

@@ -84,11 +84,15 @@ public class VideoStreamsView
     setRenderMode(RENDERMODE_WHEN_DIRTY);
   }
 
+  public void updateDisplaySize(Point screenDimensions) {
+    this.screenDimensions = screenDimensions;
+  }
+
   /** Queue |frame| to be uploaded. */
   public void queueFrame(final Endpoint stream, I420Frame frame) {
     // Paying for the copy of the YUV data here allows CSC and painting time
     // to get spent on the render thread instead of the UI thread.
-    abortUnless(framePool.validateDimensions(frame), "Frame too large!");
+    abortUnless(FramePool.validateDimensions(frame), "Frame too large!");
     final I420Frame frameCopy = framePool.takeFrame(frame).copyFrom(frame);
     boolean needToScheduleRender;
     synchronized (framesToRender) {

webrtc/examples/android/media_demo/jni/on_load.cc

@@ -38,7 +38,7 @@ JOWW(void, NativeWebRtcContextRegistry_register)(
     jobject context) {
   webrtc_examples::SetVoeDeviceObjects(g_vm);
   webrtc_examples::SetVieDeviceObjects(g_vm);
-  CHECK(webrtc::VideoEngine::SetAndroidObjects(g_vm) == 0,
+  CHECK(webrtc::VideoEngine::SetAndroidObjects(g_vm, context) == 0,
         "Failed to register android objects to video engine");
   CHECK(webrtc::VoiceEngine::SetAndroidObjects(g_vm, jni, context) == 0,
         "Failed to register android objects to voice engine");
@@ -47,7 +47,7 @@ JOWW(void, NativeWebRtcContextRegistry_register)(
 JOWW(void, NativeWebRtcContextRegistry_unRegister)(
     JNIEnv* jni,
     jclass) {
-  CHECK(webrtc::VideoEngine::SetAndroidObjects(NULL) == 0,
+  CHECK(webrtc::VideoEngine::SetAndroidObjects(NULL, NULL) == 0,
         "Failed to unregister android objects from video engine");
   CHECK(webrtc::VoiceEngine::SetAndroidObjects(NULL, NULL, NULL) == 0,
         "Failed to unregister android objects from voice engine");

webrtc/modules/video_capture/android/java/src/org/webrtc/videoengine/VideoCaptureAndroid.java

@@ -15,6 +15,7 @@ import java.util.Locale;
 import java.util.concurrent.Exchanger;
 import java.util.concurrent.locks.ReentrantLock;
 
+import android.content.Context;
 import android.graphics.ImageFormat;
 import android.graphics.PixelFormat;
 import android.graphics.Rect;
@@ -25,6 +26,7 @@ import android.hardware.Camera;
 import android.os.Handler;
 import android.os.Looper;
 import android.util.Log;
+import android.view.OrientationEventListener;
 import android.view.SurfaceHolder.Callback;
 import android.view.SurfaceHolder;
 
@@ -46,6 +48,7 @@ public class VideoCaptureAndroid implements PreviewCallback, Callback {
   private Handler cameraThreadHandler;
   private final int id;
   private final Camera.CameraInfo info;
+  private final OrientationEventListener orientationListener;
   private final long native_capturer;  // |VideoCaptureAndroid*| in C++.
   private SurfaceTexture dummySurfaceTexture;
   // Arbitrary queue depth.  Higher number means more memory allocated & held,
@@ -66,8 +69,30 @@ public class VideoCaptureAndroid implements PreviewCallback, Callback {
     this.native_capturer = native_capturer;
     this.info = new Camera.CameraInfo();
     Camera.getCameraInfo(id, info);
+
+    // Must be the last thing in the ctor since we pass a reference to |this|!
+    final VideoCaptureAndroid self = this;
+    orientationListener = new OrientationEventListener(GetContext()) {
+        @Override public void onOrientationChanged(int degrees) {
+          if (degrees == OrientationEventListener.ORIENTATION_UNKNOWN) {
+            return;
+          }
+          if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
+            degrees = (info.orientation - degrees + 360) % 360;
+          } else {  // back-facing
+            degrees = (info.orientation + degrees) % 360;
+          }
+          self.OnOrientationChanged(self.native_capturer, degrees);
+        }
+      };
+    // Don't add any code here; see the comment above |self| above!
   }
 
+  // Return the global application context.
+  private static native Context GetContext();
+  // Request frame rotation post-capture.
+  private native void OnOrientationChanged(long captureObject, int degrees);
+
   private class CameraThread extends Thread {
     private Exchanger<Handler> handlerExchanger;
     public CameraThread(Exchanger<Handler> handlerExchanger) {
@@ -96,6 +121,7 @@ public class VideoCaptureAndroid implements PreviewCallback, Callback {
     cameraThread = new CameraThread(handlerExchanger);
     cameraThread.start();
     cameraThreadHandler = exchange(handlerExchanger, null);
+    orientationListener.enable();
 
     final Exchanger<Boolean> result = new Exchanger<Boolean>();
     cameraThreadHandler.post(new Runnable() {
@@ -186,6 +212,7 @@ public class VideoCaptureAndroid implements PreviewCallback, Callback {
     }
     cameraThreadHandler = null;
     cameraThread = null;
+    orientationListener.disable();
     return status;
   }
 

webrtc/modules/video_capture/android/video_capture_android.cc

@@ -19,9 +19,16 @@
 
 static JavaVM* g_jvm = NULL;
 static jclass g_java_capturer_class = NULL;  // VideoCaptureAndroid.class.
+static jobject g_context = NULL;  // Owned android.content.Context.
 
 namespace webrtc {
 
+// Called by Java to get the global application context.
+jobject JNICALL GetContext(JNIEnv* env, jclass) {
+  assert(g_context);
+  return g_context;
+}
+
 // Called by Java when the camera has a new frame to deliver.
 void JNICALL ProvideCameraFrame(
     JNIEnv* env,
@@ -38,11 +45,31 @@ void JNICALL ProvideCameraFrame(
   env->ReleaseByteArrayElements(javaCameraFrame, cameraFrame, JNI_ABORT);
 }
 
-int32_t SetCaptureAndroidVM(JavaVM* javaVM) {
+// Called by Java when the device orientation has changed.
+void JNICALL OnOrientationChanged(
+    JNIEnv* env, jobject, jlong context, jint degrees) {
+  webrtc::videocapturemodule::VideoCaptureAndroid* captureModule =
+      reinterpret_cast<webrtc::videocapturemodule::VideoCaptureAndroid*>(
+          context);
+  degrees = (360 + degrees) % 360;
+  assert(degrees >= 0 && degrees < 360);
+  VideoCaptureRotation rotation =
+      (degrees <= 45 || degrees > 315) ? kCameraRotate0 :
+      (degrees > 45 && degrees <= 135) ? kCameraRotate90 :
+      (degrees > 135 && degrees <= 225) ? kCameraRotate180 :
+      (degrees > 225 && degrees <= 315) ? kCameraRotate270 :
+      kCameraRotate0;  // Impossible.
+  int32_t status =
+      captureModule->VideoCaptureImpl::SetCaptureRotation(rotation);
+  assert(status == 0);
+}
+
+int32_t SetCaptureAndroidVM(JavaVM* javaVM, jobject context) {
   if (javaVM) {
     assert(!g_jvm);
     g_jvm = javaVM;
     AttachThreadScoped ats(g_jvm);
+    g_context = ats.env()->NewGlobalRef(context);
 
     videocapturemodule::DeviceInfoAndroid::Initialize(ats.env());
 
@@ -53,12 +80,18 @@ int32_t SetCaptureAndroidVM(JavaVM* javaVM) {
         reinterpret_cast<jclass>(ats.env()->NewGlobalRef(j_capture_class));
     assert(g_java_capturer_class);
 
-    JNINativeMethod native_method = {
-      "ProvideCameraFrame", "([BIJ)V",
-      reinterpret_cast<void*>(&ProvideCameraFrame)
-    };
+    JNINativeMethod native_methods[] = {
+        {"GetContext",
+         "()Landroid/content/Context;",
+         reinterpret_cast<void*>(&GetContext)},
+        {"OnOrientationChanged",
+         "(JI)V",
+         reinterpret_cast<void*>(&OnOrientationChanged)},
+        {"ProvideCameraFrame",
+         "([BIJ)V",
+         reinterpret_cast<void*>(&ProvideCameraFrame)}};
     if (ats.env()->RegisterNatives(g_java_capturer_class,
-                                   &native_method, 1) != 0)
+                                   native_methods, 3) != 0)
       assert(false);
   } else {
     if (g_jvm) {
@@ -66,6 +99,8 @@ int32_t SetCaptureAndroidVM(JavaVM* javaVM) {
       ats.env()->UnregisterNatives(g_java_capturer_class);
       ats.env()->DeleteGlobalRef(g_java_capturer_class);
       g_java_capturer_class = NULL;
+      ats.env()->DeleteGlobalRef(g_context);
+      g_context = NULL;
       videocapturemodule::DeviceInfoAndroid::DeInitialize();
       g_jvm = NULL;
     }
@@ -198,8 +233,9 @@ int32_t VideoCaptureAndroid::CaptureSettings(
 int32_t VideoCaptureAndroid::SetCaptureRotation(
     VideoCaptureRotation rotation) {
   CriticalSectionScoped cs(&_apiCs);
-  if (VideoCaptureImpl::SetCaptureRotation(rotation) != 0)
-    return 0;
+  int32_t status = VideoCaptureImpl::SetCaptureRotation(rotation);
+  if (status != 0)
+    return status;
 
   AttachThreadScoped ats(g_jvm);
   JNIEnv* env = ats.env();

webrtc/modules/video_capture/ensure_initialized.cc

@@ -36,7 +36,7 @@ void EnsureInitialized() {}
 namespace webrtc {
 
 // Declared in webrtc/modules/video_capture/include/video_capture.h.
-int32_t SetCaptureAndroidVM(JavaVM* javaVM);
+int32_t SetCaptureAndroidVM(JavaVM* javaVM, jobject g_context);
 
 namespace videocapturemodule {
 
@@ -44,10 +44,11 @@ static pthread_once_t g_initialize_once = PTHREAD_ONCE_INIT;
 
 void EnsureInitializedOnce() {
   JNIEnv* jni = ::base::android::AttachCurrentThread();
+  jobject context = ::base::android::GetApplicationContext();
   JavaVM* jvm = NULL;
   int status = jni->GetJavaVM(&jvm);
   ASSERT(status == 0);
-  status = webrtc::SetCaptureAndroidVM(jvm) == 0;
+  status = webrtc::SetCaptureAndroidVM(jvm, context) == 0;
   ASSERT(status);
 }
 

webrtc/modules/video_capture/include/video_capture.h

@@ -21,7 +21,7 @@
 namespace webrtc {
 
 #if defined(ANDROID)
-int32_t SetCaptureAndroidVM(JavaVM* javaVM);
+int32_t SetCaptureAndroidVM(JavaVM* javaVM, jobject context);
 #endif
 
 class VideoCaptureModule: public RefCountedModule {

webrtc/video_engine/include/vie_base.h

@@ -150,7 +150,7 @@ class WEBRTC_DLLEXPORT VideoEngine {
 
 #if defined(ANDROID) && !defined(WEBRTC_CHROMIUM_BUILD)
   // Android specific.
-  static int SetAndroidObjects(JavaVM* java_vm);
+  static int SetAndroidObjects(JavaVM* java_vm, jobject context);
 #endif
 
  protected:

webrtc/video_engine/test/auto_test/source/vie_autotest_android.cc

@@ -21,7 +21,7 @@ int ViEAutoTestAndroid::RunAutotest(int testSelection, int subTestSelection,
                                     JavaVM* javaVM, void* env, void* context) {
   ViEAutoTest vieAutoTest(window1, window2);
   ViETest::Log("RunAutoTest(%d, %d)", testSelection, subTestSelection);
-  webrtc::VideoEngine::SetAndroidObjects(javaVM);
+  webrtc::VideoEngine::SetAndroidObjects(javaVM, context);
 #ifndef WEBRTC_ANDROID_OPENSLES
   // voice engine calls into ADM directly
   webrtc::VoiceEngine::SetAndroidObjects(javaVM, env, context);

webrtc/video_engine/vie_impl.cc

@@ -140,10 +140,10 @@ int VideoEngine::SetTraceCallback(TraceCallback* callback) {
 }
 
 #if defined(ANDROID) && !defined(WEBRTC_CHROMIUM_BUILD)
-int VideoEngine::SetAndroidObjects(JavaVM* javaVM) {
+int VideoEngine::SetAndroidObjects(JavaVM* javaVM, jobject context) {
   LOG_F(LS_INFO);
 
-  if (SetCaptureAndroidVM(javaVM) != 0) {
+  if (SetCaptureAndroidVM(javaVM, context) != 0) {
     LOG(LS_ERROR) << "Could not set capture Android VM";
     return -1;
   }