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      1 /*
      2  * Copyright (C) 2016 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 package android.media;
     17 
     18 import android.media.MediaDrm;
     19 
     20 import java.util.Arrays;
     21 import java.util.HashMap;
     22 import java.util.Map;
     23 import java.util.UUID;
     24 
     25 /**
     26  * Encapsulates initialization data required by a {@link MediaDrm} instance.
     27  */
     28 public abstract class DrmInitData {
     29 
     30     /**
     31      * Prevent public constuctor access
     32      */
     33     /* package private */ DrmInitData() {
     34     }
     35 
     36     /**
     37      * Retrieves initialization data for a given DRM scheme, specified by its UUID.
     38      *
     39      * @param schemeUuid The DRM scheme's UUID.
     40      * @return The initialization data for the scheme, or null if the scheme is not supported.
     41      */
     42     public abstract SchemeInitData get(UUID schemeUuid);
     43 
     44     /**
     45      * Scheme initialization data.
     46      */
     47     public static final class SchemeInitData {
     48 
     49         /**
     50          * The mimeType of {@link #data}.
     51          */
     52         public final String mimeType;
     53         /**
     54          * The initialization data.
     55          */
     56         public final byte[] data;
     57 
     58         /**
     59          * @param mimeType The mimeType of the initialization data.
     60          * @param data The initialization data.
     61          *
     62          * @hide
     63          */
     64         public SchemeInitData(String mimeType, byte[] data) {
     65             this.mimeType = mimeType;
     66             this.data = data;
     67         }
     68 
     69         @Override
     70         public boolean equals(Object obj) {
     71             if (!(obj instanceof SchemeInitData)) {
     72                 return false;
     73             }
     74             if (obj == this) {
     75                 return true;
     76             }
     77 
     78             SchemeInitData other = (SchemeInitData) obj;
     79             return mimeType.equals(other.mimeType) && Arrays.equals(data, other.data);
     80         }
     81 
     82         @Override
     83         public int hashCode() {
     84             return mimeType.hashCode() + 31 * Arrays.hashCode(data);
     85         }
     86 
     87     }
     88 
     89 }
     90