Support for video file instead of camera and output video out to file

webrtc/api/android/java/src/org/webrtc/SurfaceTextureHelper.java

 /*
  *  Copyright 2015 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 58 matching lines @@
           return new SurfaceTextureHelper(sharedContext, handler);
         } catch (RuntimeException e) {
           Logging.e(TAG, threadName + " create failure", e);
           return null;
         }
       }
     });
   }
 
   // State for YUV conversion, instantiated on demand.
-  static private class YuvConverter {
+  static public class YuvConverter {
     private final EglBase eglBase;
     private final GlShader shader;
     private boolean released = false;
 
     // Vertex coordinates in Normalized Device Coordinates, i.e.
     // (-1, -1) is bottom-left and (1, 1) is top-right.
     private static final FloatBuffer DEVICE_RECTANGLE =
         GlUtil.createFloatBuffer(new float[] {
               -1.0f, -1.0f,  // Bottom left.
                1.0f, -1.0f,  // Bottom right.
@@ skipping 249 matching lines @@
     surfaceTexture = new SurfaceTexture(oesTextureId);
     surfaceTexture.setOnFrameAvailableListener(new SurfaceTexture.OnFrameAvailableListener() {
       @Override
       public void onFrameAvailable(SurfaceTexture surfaceTexture) {
         hasPendingTexture = true;
         tryDeliverTextureFrame();
       }
     });
   }
 
-  private YuvConverter getYuvConverter() {
+  public YuvConverter getYuvConverter() {
     // yuvConverter is assigned once
     if (yuvConverter != null)
       return yuvConverter;
 
     synchronized(this) {
       if (yuvConverter == null)
         yuvConverter = new YuvConverter(eglBase.getEglBaseContext());
       return yuvConverter;
     }
   }
@@ skipping 129 matching lines @@
     synchronized (this) {
       if (yuvConverter != null)
         yuvConverter.release();
     }
     GLES20.glDeleteTextures(1, new int[] {oesTextureId}, 0);
     surfaceTexture.release();
     eglBase.release();
     handler.getLooper().quit();
   }
 }