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.MutableFrameFormat;
25import android.filterfw.core.NativeProgram;
26import android.filterfw.core.Program;
27import android.filterfw.format.ImageFormat;
28
29/**
30 * @hide
31 */
32public class ToRGBFilter extends Filter {
33
34    private int mInputBPP;
35    private Program mProgram;
36    private FrameFormat mLastFormat = null;
37
38    public ToRGBFilter(String name) {
39        super(name);
40    }
41
42    @Override
43    public void setupPorts() {
44        MutableFrameFormat mask = new MutableFrameFormat(FrameFormat.TYPE_BYTE,
45                                                         FrameFormat.TARGET_NATIVE);
46        mask.setDimensionCount(2);
47        addMaskedInputPort("image", mask);
48        addOutputBasedOnInput("image", "image");
49    }
50
51    @Override
52    public FrameFormat getOutputFormat(String portName, FrameFormat inputFormat) {
53        return getConvertedFormat(inputFormat);
54    }
55
56    public FrameFormat getConvertedFormat(FrameFormat format) {
57        MutableFrameFormat result = format.mutableCopy();
58        result.setMetaValue(ImageFormat.COLORSPACE_KEY, ImageFormat.COLORSPACE_RGB);
59        result.setBytesPerSample(3);
60        return result;
61    }
62
63    public void createProgram(FilterContext context, FrameFormat format) {
64        mInputBPP = format.getBytesPerSample();
65        if (mLastFormat != null && mLastFormat.getBytesPerSample() == mInputBPP) return;
66        mLastFormat = format;
67        switch (mInputBPP) {
68            case 1:
69                mProgram = new NativeProgram("filterpack_imageproc", "gray_to_rgb");
70                break;
71            case 4:
72                mProgram = new NativeProgram("filterpack_imageproc", "rgba_to_rgb");
73                break;
74            default:
75                throw new RuntimeException("Unsupported BytesPerPixel: " + mInputBPP + "!");
76        }
77    }
78
79    @Override
80    public void process(FilterContext context) {
81        // Get input frame
82        Frame input = pullInput("image");
83        createProgram(context, input.getFormat());
84
85        // Create output frame
86        Frame output = context.getFrameManager().newFrame(getConvertedFormat(input.getFormat()));
87
88        // Process
89        mProgram.process(input, output);
90
91        // Push output
92        pushOutput("image", output);
93
94        // Release pushed frame
95        output.release();
96    }
97
98}
99