Revert of Android MediaCodecVideoDecoder: Manage lifetime of texture frames

talk/app/webrtc/java/android/org/webrtc/SurfaceViewRenderer.java

 /*
  * libjingle
  * Copyright 2015 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 12 matching lines @@
  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 package org.webrtc;
 
 import android.content.Context;
 import android.content.res.Resources.NotFoundException;
 import android.graphics.Point;
+import android.graphics.SurfaceTexture;
 import android.opengl.GLES20;
+import android.opengl.Matrix;
 import android.os.Handler;
 import android.os.HandlerThread;
 import android.util.AttributeSet;
 import android.view.SurfaceHolder;
 import android.view.SurfaceView;
 
 import org.webrtc.Logging;
 
 import java.util.concurrent.CountDownLatch;
 
@@ skipping 404 matching lines @@
     final VideoRenderer.I420Frame frame;
     synchronized (frameLock) {
       if (pendingFrame == null) {
         return;
       }
       frame = pendingFrame;
       pendingFrame = null;
     }
 
     final long startTimeNs = System.nanoTime();
+    final float[] samplingMatrix;
+    if (frame.yuvFrame) {
+      // The convention in WebRTC is that the first element in a ByteBuffer corresponds to the
+      // top-left corner of the image, but in glTexImage2D() the first element corresponds to the
+      // bottom-left corner. We correct this discrepancy by setting a vertical flip as sampling
+      // matrix.
+      samplingMatrix = RendererCommon.verticalFlipMatrix();
+    } else {
+      // TODO(magjed): Move updateTexImage() to the video source instead.
+      SurfaceTexture surfaceTexture = (SurfaceTexture) frame.textureObject;
+      surfaceTexture.updateTexImage();
+      samplingMatrix = new float[16];
+      surfaceTexture.getTransformMatrix(samplingMatrix);
+    }
+
     final float[] texMatrix;
     synchronized (layoutLock) {
       final float[] rotatedSamplingMatrix =
-          RendererCommon.rotateTextureMatrix(frame.samplingMatrix, frame.rotationDegree);
+          RendererCommon.rotateTextureMatrix(samplingMatrix, frame.rotationDegree);
       final float[] layoutMatrix = RendererCommon.getLayoutMatrix(
           mirror, frameAspectRatio(), (float) layoutWidth / layoutHeight);
       texMatrix = RendererCommon.multiplyMatrices(rotatedSamplingMatrix, layoutMatrix);
     }
 
     GLES20.glViewport(0, 0, surfaceWidth, surfaceHeight);
     // TODO(magjed): glClear() shouldn't be necessary since every pixel is covered anyway, but it's
     // a workaround for bug 5147. Performance will be slightly worse.
     GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
     if (frame.yuvFrame) {
@@ skipping 64 matching lines @@
       if (framesReceived > 0 && framesRendered > 0) {
         final long timeSinceFirstFrameNs = System.nanoTime() - firstFrameTimeNs;
         Logging.d(TAG, getResourceName() + "Duration: " + (int) (timeSinceFirstFrameNs / 1e6) +
             " ms. FPS: " + (float) framesRendered * 1e9 / timeSinceFirstFrameNs);
         Logging.d(TAG, getResourceName() + "Average render time: "
             + (int) (renderTimeNs / (1000 * framesRendered)) + " us.");
       }
     }
   }
 }