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
18package android.filterpacks.imageproc;
19
20import android.filterfw.core.Filter;
21import android.filterfw.core.FilterContext;
22import android.filterfw.core.Frame;
23import android.filterfw.core.FrameFormat;
24import android.filterfw.core.GenerateFieldPort;
25import android.filterfw.format.ImageFormat;
26import android.graphics.Bitmap;
27
28/**
29 * @hide
30 */
31public class BitmapSource extends Filter {
32
33    @GenerateFieldPort(name = "target")
34    String mTargetString;
35
36    @GenerateFieldPort(name = "bitmap")
37    private Bitmap mBitmap;
38
39    @GenerateFieldPort(name = "recycleBitmap", hasDefault = true)
40    private boolean mRecycleBitmap = true;
41
42    @GenerateFieldPort(name = "repeatFrame", hasDefault = true)
43    boolean mRepeatFrame = false;
44
45    private int mTarget;
46    private Frame mImageFrame;
47
48    public BitmapSource(String name) {
49        super(name);
50    }
51
52
53    @Override
54    public void setupPorts() {
55        // Setup output format
56        FrameFormat outputFormat = ImageFormat.create(ImageFormat.COLORSPACE_RGBA,
57                                                      FrameFormat.TARGET_UNSPECIFIED);
58
59        // Add output port
60        addOutputPort("image", outputFormat);
61    }
62
63    public void loadImage(FilterContext filterContext) {
64        // Create frame with bitmap
65        mTarget = FrameFormat.readTargetString(mTargetString);
66        FrameFormat outputFormat = ImageFormat.create(mBitmap.getWidth(),
67                                                      mBitmap.getHeight(),
68                                                      ImageFormat.COLORSPACE_RGBA,
69                                                      mTarget);
70        mImageFrame = filterContext.getFrameManager().newFrame(outputFormat);
71        mImageFrame.setBitmap(mBitmap);
72        mImageFrame.setTimestamp(Frame.TIMESTAMP_UNKNOWN);
73
74        // Free up space used by bitmap
75        if (mRecycleBitmap) {
76            mBitmap.recycle();
77        }
78        mBitmap = null;
79    }
80
81    @Override
82    public void fieldPortValueUpdated(String name, FilterContext context) {
83        // Clear image (to trigger reload) in case parameters have been changed
84        if (name.equals("bitmap") || name.equals("target")) {
85            if (mImageFrame != null) {
86                mImageFrame.release();
87                mImageFrame = null;
88            }
89        }
90    }
91
92    @Override
93    public void process(FilterContext context) {
94        if (mImageFrame == null) {
95            loadImage(context);
96        }
97
98        pushOutput("image", mImageFrame);
99
100        if (!mRepeatFrame) {
101            closeOutputPort("image");
102        }
103    }
104
105    @Override
106    public void tearDown(FilterContext env) {
107        if (mImageFrame != null) {
108            mImageFrame.release();
109            mImageFrame = null;
110        }
111    }
112}
113