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      1 /*
      2  * Copyright (C) 2011 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 
     18 package android.filterpacks.imageproc;
     19 
     20 import android.content.Context;
     21 import android.filterfw.core.Filter;
     22 import android.filterfw.core.FilterContext;
     23 import android.filterfw.core.Frame;
     24 import android.filterfw.core.FrameFormat;
     25 import android.filterfw.core.FrameManager;
     26 import android.filterfw.core.GenerateFinalPort;
     27 import android.filterfw.core.GenerateFieldPort;
     28 import android.filterfw.core.KeyValueMap;
     29 import android.filterfw.core.MutableFrameFormat;
     30 import android.filterfw.core.NativeFrame;
     31 import android.filterfw.format.ImageFormat;
     32 import android.graphics.Bitmap;
     33 
     34 /**
     35  * @hide
     36  */
     37 public class BitmapSource extends Filter {
     38 
     39     @GenerateFieldPort(name = "target")
     40     String mTargetString;
     41 
     42     @GenerateFieldPort(name = "bitmap")
     43     private Bitmap mBitmap;
     44 
     45     @GenerateFieldPort(name = "recycleBitmap", hasDefault = true)
     46     private boolean mRecycleBitmap = true;
     47 
     48     @GenerateFieldPort(name = "repeatFrame", hasDefault = true)
     49     boolean mRepeatFrame = false;
     50 
     51     private int mTarget;
     52     private Frame mImageFrame;
     53 
     54     public BitmapSource(String name) {
     55         super(name);
     56     }
     57 
     58 
     59     @Override
     60     public void setupPorts() {
     61         // Setup output format
     62         FrameFormat outputFormat = ImageFormat.create(ImageFormat.COLORSPACE_RGBA,
     63                                                       FrameFormat.TARGET_UNSPECIFIED);
     64 
     65         // Add output port
     66         addOutputPort("image", outputFormat);
     67     }
     68 
     69     public void loadImage(FilterContext filterContext) {
     70         // Create frame with bitmap
     71         mTarget = FrameFormat.readTargetString(mTargetString);
     72         FrameFormat outputFormat = ImageFormat.create(mBitmap.getWidth(),
     73                                                       mBitmap.getHeight(),
     74                                                       ImageFormat.COLORSPACE_RGBA,
     75                                                       mTarget);
     76         mImageFrame = filterContext.getFrameManager().newFrame(outputFormat);
     77         mImageFrame.setBitmap(mBitmap);
     78         mImageFrame.setTimestamp(Frame.TIMESTAMP_UNKNOWN);
     79 
     80         // Free up space used by bitmap
     81         if (mRecycleBitmap) {
     82             mBitmap.recycle();
     83         }
     84         mBitmap = null;
     85     }
     86 
     87     @Override
     88     public void fieldPortValueUpdated(String name, FilterContext context) {
     89         // Clear image (to trigger reload) in case parameters have been changed
     90         if (name.equals("bitmap") || name.equals("target")) {
     91             if (mImageFrame != null) {
     92                 mImageFrame.release();
     93                 mImageFrame = null;
     94             }
     95         }
     96     }
     97 
     98     @Override
     99     public void process(FilterContext context) {
    100         if (mImageFrame == null) {
    101             loadImage(context);
    102         }
    103 
    104         pushOutput("image", mImageFrame);
    105 
    106         if (!mRepeatFrame) {
    107             closeOutputPort("image");
    108         }
    109     }
    110 
    111     @Override
    112     public void tearDown(FilterContext env) {
    113         if (mImageFrame != null) {
    114             mImageFrame.release();
    115             mImageFrame = null;
    116         }
    117     }
    118 }
    119