Michael Kolb | 8872c23 | 2013-01-29 10:33:22 -0800 | [diff] [blame] | 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 | } |