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      1 /*
      2  * Copyright (C) 2006 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 package android.graphics;
     18 
     19 import android.content.res.AssetManager;
     20 import java.io.InputStream;
     21 import java.io.FileInputStream;
     22 
     23 public class Movie {
     24     private final long mNativeMovie;
     25 
     26     private Movie(long nativeMovie) {
     27         if (nativeMovie == 0) {
     28             throw new RuntimeException("native movie creation failed");
     29         }
     30         mNativeMovie = nativeMovie;
     31     }
     32 
     33     public native int width();
     34     public native int height();
     35     public native boolean isOpaque();
     36     public native int duration();
     37 
     38     public native boolean setTime(int relativeMilliseconds);
     39 
     40     public native void draw(Canvas canvas, float x, float y, Paint paint);
     41 
     42     public void draw(Canvas canvas, float x, float y) {
     43         draw(canvas, x, y, null);
     44     }
     45 
     46     public static Movie decodeStream(InputStream is) {
     47         if (is == null) {
     48             return null;
     49         }
     50         if (is instanceof AssetManager.AssetInputStream) {
     51             final long asset = ((AssetManager.AssetInputStream) is).getNativeAsset();
     52             return nativeDecodeAsset(asset);
     53         }
     54 
     55         return nativeDecodeStream(is);
     56     }
     57 
     58     private static native Movie nativeDecodeAsset(long asset);
     59     private static native Movie nativeDecodeStream(InputStream is);
     60     public static native Movie decodeByteArray(byte[] data, int offset,
     61                                                int length);
     62 
     63     private static native void nativeDestructor(long nativeMovie);
     64 
     65     public static Movie decodeFile(String pathName) {
     66         InputStream is;
     67         try {
     68             is = new FileInputStream(pathName);
     69         }
     70         catch (java.io.FileNotFoundException e) {
     71             return null;
     72         }
     73         return decodeTempStream(is);
     74     }
     75 
     76     @Override
     77     protected void finalize() throws Throwable {
     78         try {
     79             nativeDestructor(mNativeMovie);
     80         } finally {
     81             super.finalize();
     82         }
     83     }
     84 
     85     private static Movie decodeTempStream(InputStream is) {
     86         Movie moov = null;
     87         try {
     88             moov = decodeStream(is);
     89             is.close();
     90         }
     91         catch (java.io.IOException e) {
     92             /*  do nothing.
     93                 If the exception happened on open, moov will be null.
     94                 If it happened on close, moov is still valid.
     95             */
     96         }
     97         return moov;
     98     }
     99 }
    100