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 package com.android.camera; 18 19 import android.graphics.Bitmap; 20 import android.media.MediaMetadataRetriever; 21 22 import java.io.FileDescriptor; 23 24 public class Thumbnail { 25 public static Bitmap createVideoThumbnailBitmap(FileDescriptor fd, int targetWidth) { 26 return createVideoThumbnailBitmap(null, fd, targetWidth); 27 } 28 29 public static Bitmap createVideoThumbnailBitmap(String filePath, int targetWidth) { 30 return createVideoThumbnailBitmap(filePath, null, targetWidth); 31 } 32 33 private static Bitmap createVideoThumbnailBitmap(String filePath, FileDescriptor fd, 34 int targetWidth) { 35 Bitmap bitmap = null; 36 MediaMetadataRetriever retriever = new MediaMetadataRetriever(); 37 try { 38 if (filePath != null) { 39 retriever.setDataSource(filePath); 40 } else { 41 retriever.setDataSource(fd); 42 } 43 bitmap = retriever.getFrameAtTime(-1); 44 } catch (IllegalArgumentException ex) { 45 // Assume this is a corrupt video file 46 } catch (RuntimeException ex) { 47 // Assume this is a corrupt video file. 48 } finally { 49 try { 50 retriever.release(); 51 } catch (RuntimeException ex) { 52 // Ignore failures while cleaning up. 53 } 54 } 55 if (bitmap == null) return null; 56 57 // Scale down the bitmap if it is bigger than we need. 58 int width = bitmap.getWidth(); 59 int height = bitmap.getHeight(); 60 if (width > targetWidth) { 61 float scale = (float) targetWidth / width; 62 int w = Math.round(scale * width); 63 int h = Math.round(scale * height); 64 bitmap = Bitmap.createScaledBitmap(bitmap, w, h, true); 65 } 66 return bitmap; 67 } 68 } 69
