| /* |
| * Copyright (C) 2011 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| |
| package android.filterfw.core; |
| |
| import android.content.Context; |
| import android.util.AttributeSet; |
| import android.view.SurfaceHolder; |
| import android.view.SurfaceView; |
| |
| /** |
| * @hide |
| */ |
| public class FilterSurfaceView extends SurfaceView implements SurfaceHolder.Callback { |
| |
| private static int STATE_ALLOCATED = 0; |
| private static int STATE_CREATED = 1; |
| private static int STATE_INITIALIZED = 2; |
| |
| private int mState = STATE_ALLOCATED; |
| private SurfaceHolder.Callback mListener; |
| private GLEnvironment mGLEnv; |
| private int mFormat; |
| private int mWidth; |
| private int mHeight; |
| private int mSurfaceId = -1; |
| |
| public FilterSurfaceView(Context context) { |
| super(context); |
| getHolder().addCallback(this); |
| } |
| |
| public FilterSurfaceView(Context context, AttributeSet attrs) { |
| super(context, attrs); |
| getHolder().addCallback(this); |
| } |
| |
| public synchronized void bindToListener(SurfaceHolder.Callback listener, GLEnvironment glEnv) { |
| // Make sure we are not bound already |
| if (listener == null) { |
| throw new NullPointerException("Attempting to bind null filter to SurfaceView!"); |
| } else if (mListener != null && mListener != listener) { |
| throw new RuntimeException( |
| "Attempting to bind filter " + listener + " to SurfaceView with another open " |
| + "filter " + mListener + " attached already!"); |
| } |
| |
| // Set listener |
| mListener = listener; |
| |
| // Set GLEnv |
| if (mGLEnv != null && mGLEnv != glEnv) { |
| mGLEnv.unregisterSurfaceId(mSurfaceId); |
| } |
| mGLEnv = glEnv; |
| |
| // Check if surface has been created already |
| if (mState >= STATE_CREATED) { |
| // Register with env (double registration will be ignored by GLEnv, so we can simply |
| // try to do it here). |
| registerSurface(); |
| |
| // Forward surface created to listener |
| mListener.surfaceCreated(getHolder()); |
| |
| // Forward surface changed to listener |
| if (mState == STATE_INITIALIZED) { |
| mListener.surfaceChanged(getHolder(), mFormat, mWidth, mHeight); |
| } |
| } |
| } |
| |
| public synchronized void unbind() { |
| mListener = null; |
| } |
| |
| public synchronized int getSurfaceId() { |
| return mSurfaceId; |
| } |
| |
| public synchronized GLEnvironment getGLEnv() { |
| return mGLEnv; |
| } |
| |
| @Override |
| public synchronized void surfaceCreated(SurfaceHolder holder) { |
| mState = STATE_CREATED; |
| |
| // Register with GLEnvironment if we have it already |
| if (mGLEnv != null) { |
| registerSurface(); |
| } |
| |
| // Forward callback to listener |
| if (mListener != null) { |
| mListener.surfaceCreated(holder); |
| } |
| } |
| |
| @Override |
| public synchronized void surfaceChanged(SurfaceHolder holder, |
| int format, |
| int width, |
| int height) { |
| // Remember these values |
| mFormat = format; |
| mWidth = width; |
| mHeight = height; |
| mState = STATE_INITIALIZED; |
| |
| // Forward to renderer |
| if (mListener != null) { |
| mListener.surfaceChanged(holder, format, width, height); |
| } |
| } |
| |
| @Override |
| public synchronized void surfaceDestroyed(SurfaceHolder holder) { |
| mState = STATE_ALLOCATED; |
| |
| // Forward to renderer |
| if (mListener != null) { |
| mListener.surfaceDestroyed(holder); |
| } |
| |
| // Get rid of internal objects associated with this surface |
| unregisterSurface(); |
| } |
| |
| private void registerSurface() { |
| mSurfaceId = mGLEnv.registerSurface(getHolder().getSurface()); |
| if (mSurfaceId < 0) { |
| throw new RuntimeException("Could not register Surface: " + getHolder().getSurface() + |
| " in FilterSurfaceView!"); |
| } |
| } |
| private void unregisterSurface() { |
| if (mGLEnv != null && mSurfaceId > 0) { |
| mGLEnv.unregisterSurfaceId(mSurfaceId); |
| } |
| } |
| |
| } |