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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.filterfw.format;
     19 
     20 import android.filterfw.core.FrameFormat;
     21 import android.filterfw.core.MutableFrameFormat;
     22 import android.graphics.Bitmap;
     23 
     24 /**
     25  * @hide
     26  */
     27 public class ImageFormat {
     28 
     29     public static final String COLORSPACE_KEY = "colorspace";
     30 
     31     public static final int COLORSPACE_GRAY  = 1;
     32     public static final int COLORSPACE_RGB   = 2;
     33     public static final int COLORSPACE_RGBA  = 3;
     34     public static final int COLORSPACE_YUV   = 4;
     35 
     36     public static MutableFrameFormat create(int width,
     37                                             int height,
     38                                             int colorspace,
     39                                             int bytesPerSample,
     40                                             int target) {
     41         MutableFrameFormat result = new MutableFrameFormat(FrameFormat.TYPE_BYTE, target);
     42         result.setDimensions(width, height);
     43         result.setBytesPerSample(bytesPerSample);
     44         result.setMetaValue(COLORSPACE_KEY, colorspace);
     45         if (target == FrameFormat.TARGET_SIMPLE) {
     46             result.setObjectClass(Bitmap.class);
     47         }
     48         return result;
     49     }
     50 
     51     public static MutableFrameFormat create(int width,
     52                                             int height,
     53                                             int colorspace,
     54                                             int target) {
     55         return create(width,
     56                       height,
     57                       colorspace,
     58                       bytesPerSampleForColorspace(colorspace),
     59                       target);
     60     }
     61 
     62     public static MutableFrameFormat create(int colorspace, int target) {
     63         return create(FrameFormat.SIZE_UNSPECIFIED,
     64                       FrameFormat.SIZE_UNSPECIFIED,
     65                       colorspace,
     66                       bytesPerSampleForColorspace(colorspace),
     67                       target);
     68     }
     69 
     70     public static MutableFrameFormat create(int colorspace) {
     71         return create(FrameFormat.SIZE_UNSPECIFIED,
     72                       FrameFormat.SIZE_UNSPECIFIED,
     73                       colorspace,
     74                       bytesPerSampleForColorspace(colorspace),
     75                       FrameFormat.TARGET_UNSPECIFIED);
     76     }
     77 
     78     public static int bytesPerSampleForColorspace(int colorspace) {
     79         switch (colorspace) {
     80             case COLORSPACE_GRAY:
     81                 return 1;
     82             case COLORSPACE_RGB:
     83                 return 3;
     84             case COLORSPACE_RGBA:
     85                 return 4;
     86             case COLORSPACE_YUV:
     87                 return 3;
     88             default:
     89                 throw new RuntimeException("Unknown colorspace id " + colorspace + "!");
     90         }
     91     }
     92 }
     93