Angus Kong | 5052117 | 2014-01-17 17:23:59 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2014 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.data; |
| 18 | |
| 19 | import android.graphics.Bitmap; |
| 20 | import android.graphics.BitmapFactory; |
| 21 | import android.graphics.Matrix; |
| 22 | import android.graphics.Point; |
| 23 | import android.media.MediaMetadataRetriever; |
Angus Kong | 5052117 | 2014-01-17 17:23:59 -0800 | [diff] [blame] | 24 | |
Angus Kong | 2bca210 | 2014-03-11 16:27:30 -0700 | [diff] [blame^] | 25 | import com.android.camera.debug.Log; |
Angus Kong | 5052117 | 2014-01-17 17:23:59 -0800 | [diff] [blame] | 26 | |
Sam Judd | 2666dc8 | 2014-03-21 16:02:12 -0700 | [diff] [blame] | 27 | import java.io.FileInputStream; |
| 28 | import java.io.FileNotFoundException; |
| 29 | import java.io.IOException; |
Angus Kong | 5052117 | 2014-01-17 17:23:59 -0800 | [diff] [blame] | 30 | import java.io.InputStream; |
| 31 | |
| 32 | import javax.microedition.khronos.opengles.GL11; |
| 33 | |
| 34 | /** |
| 35 | * An utility class for data in content provider. |
| 36 | */ |
| 37 | public class LocalDataUtil { |
| 38 | |
Angus Kong | 2bca210 | 2014-03-11 16:27:30 -0700 | [diff] [blame^] | 39 | private static final Log.Tag TAG = new Log.Tag("LocalDataUtil"); |
Angus Kong | 5052117 | 2014-01-17 17:23:59 -0800 | [diff] [blame] | 40 | |
| 41 | /** |
| 42 | * @param mimeType The MIME type to check. |
| 43 | * @return Whether the MIME is a video type. |
| 44 | */ |
| 45 | public static boolean isMimeTypeVideo(String mimeType) { |
| 46 | return mimeType.startsWith("video/"); |
| 47 | } |
| 48 | |
| 49 | /** |
| 50 | * @param mimeType The MIME type to check. |
| 51 | * @return Whether the MIME is a image type. |
| 52 | */ |
| 53 | public static boolean isMimeTypeImage(String mimeType) { |
| 54 | return mimeType.startsWith("image/"); |
| 55 | } |
| 56 | |
| 57 | /** |
Angus Kong | 5052117 | 2014-01-17 17:23:59 -0800 | [diff] [blame] | 58 | * Decodes the dimension of a bitmap. |
| 59 | * |
| 60 | * @param path The path to the bitmap. |
| 61 | * @return The decoded width/height is stored in Point.x/Point.y |
| 62 | * respectively. |
| 63 | */ |
| 64 | public static Point decodeBitmapDimension(String path) { |
Sam Judd | 2666dc8 | 2014-03-21 16:02:12 -0700 | [diff] [blame] | 65 | Point size = null; |
| 66 | InputStream is = null; |
| 67 | try { |
| 68 | is = new FileInputStream(path); |
| 69 | size = decodeBitmapDimension(is); |
| 70 | } catch (FileNotFoundException e) { |
| 71 | e.printStackTrace(); |
| 72 | } finally { |
| 73 | if (is != null) { |
| 74 | try { |
| 75 | is.close(); |
| 76 | } catch (IOException e) { } |
| 77 | } |
| 78 | } |
| 79 | return size; |
| 80 | } |
| 81 | |
| 82 | /** |
| 83 | * Decodes the dimension of a bitmap. |
| 84 | * |
| 85 | * @param is An input stream with the data of the bitmap. |
| 86 | * @return The decoded width/height is stored in Point.x/Point.y |
| 87 | * respectively. |
| 88 | */ |
| 89 | public static Point decodeBitmapDimension(InputStream is) { |
| 90 | Point size = null; |
Angus Kong | 5052117 | 2014-01-17 17:23:59 -0800 | [diff] [blame] | 91 | BitmapFactory.Options justBoundsOpts = new BitmapFactory.Options(); |
| 92 | justBoundsOpts.inJustDecodeBounds = true; |
Sam Judd | 2666dc8 | 2014-03-21 16:02:12 -0700 | [diff] [blame] | 93 | BitmapFactory.decodeStream(is, null, justBoundsOpts); |
Angus Kong | 5052117 | 2014-01-17 17:23:59 -0800 | [diff] [blame] | 94 | if (justBoundsOpts.outWidth > 0 && justBoundsOpts.outHeight > 0) { |
Sam Judd | 2666dc8 | 2014-03-21 16:02:12 -0700 | [diff] [blame] | 95 | size = new Point(justBoundsOpts.outWidth, justBoundsOpts.outHeight); |
Sam Judd | de3e9ab | 2014-03-17 13:07:22 -0700 | [diff] [blame] | 96 | } else { |
Sam Judd | 2666dc8 | 2014-03-21 16:02:12 -0700 | [diff] [blame] | 97 | Log.e(TAG, "Bitmap dimension decoding failed"); |
Angus Kong | 5052117 | 2014-01-17 17:23:59 -0800 | [diff] [blame] | 98 | } |
| 99 | return size; |
| 100 | } |
| 101 | |
| 102 | /** |
| 103 | * Load the thumbnail of an image from an {@link java.io.InputStream}. |
| 104 | * |
| 105 | * @param stream The input stream of the image. |
| 106 | * @param imageWidth Image width. |
| 107 | * @param imageHeight Image height. |
| 108 | * @param widthBound The bound of the width of the decoded image. |
| 109 | * @param heightBound The bound of the height of the decoded image. |
| 110 | * @param orientation The orientation of the image. The image will be rotated |
| 111 | * clockwise in degrees. |
| 112 | * @param maximumPixels The bound for the number of pixels of the decoded image. |
| 113 | * @return {@code null} if the decoding failed. |
| 114 | */ |
| 115 | public static Bitmap loadImageThumbnailFromStream(InputStream stream, int imageWidth, |
| 116 | int imageHeight, int widthBound, int heightBound, int orientation, |
| 117 | int maximumPixels) { |
| 118 | |
| 119 | /** 32K buffer. */ |
| 120 | byte[] decodeBuffer = new byte[32 * 1024]; |
| 121 | |
Angus Kong | c195e7a | 2014-02-20 16:56:37 -0800 | [diff] [blame] | 122 | if (orientation % 180 != 0) { |
| 123 | int dummy = imageHeight; |
| 124 | imageHeight = imageWidth; |
| 125 | imageWidth = dummy; |
| 126 | } |
| 127 | |
Angus Kong | 5052117 | 2014-01-17 17:23:59 -0800 | [diff] [blame] | 128 | // Generate Bitmap of maximum size that fits into widthBound x heightBound. |
| 129 | // Algorithm: start with full size and step down in powers of 2. |
| 130 | int targetWidth = imageWidth; |
| 131 | int targetHeight = imageHeight; |
| 132 | int sampleSize = 1; |
| 133 | while (targetHeight > heightBound || targetWidth > widthBound || |
| 134 | targetHeight > GL11.GL_MAX_TEXTURE_SIZE || targetWidth > GL11.GL_MAX_TEXTURE_SIZE || |
| 135 | targetHeight * targetWidth > maximumPixels) { |
| 136 | sampleSize <<= 1; |
| 137 | targetWidth = imageWidth / sampleSize; |
| 138 | targetHeight = imageWidth / sampleSize; |
| 139 | } |
| 140 | |
| 141 | // For large (> MAXIMUM_TEXTURE_SIZE) high aspect ratio (panorama) |
| 142 | // Bitmap requests: |
| 143 | // Step 1: ask for double size. |
| 144 | // Step 2: scale maximum edge down to MAXIMUM_TEXTURE_SIZE. |
| 145 | // |
| 146 | // Here's the step 1: double size. |
| 147 | if ((heightBound > GL11.GL_MAX_TEXTURE_SIZE || widthBound > GL11.GL_MAX_TEXTURE_SIZE) && |
| 148 | targetWidth * targetHeight < maximumPixels / 4 && sampleSize > 1) { |
| 149 | sampleSize >>= 2; |
| 150 | } |
| 151 | |
| 152 | BitmapFactory.Options opts = new BitmapFactory.Options(); |
| 153 | opts.inSampleSize = sampleSize; |
| 154 | opts.inTempStorage = decodeBuffer; |
| 155 | Bitmap b = BitmapFactory.decodeStream(stream, null, opts); |
| 156 | |
| 157 | if (b == null) { |
| 158 | return null; |
| 159 | } |
| 160 | |
| 161 | // Step 2: scale maximum edge down to maximum texture size. |
| 162 | // If Bitmap maximum edge > MAXIMUM_TEXTURE_SIZE, which can happen for panoramas, |
| 163 | // scale to fit in MAXIMUM_TEXTURE_SIZE. |
| 164 | if (b.getWidth() > GL11.GL_MAX_TEXTURE_SIZE || b.getHeight() > |
| 165 | GL11.GL_MAX_TEXTURE_SIZE) { |
| 166 | int maxEdge = Math.max(b.getWidth(), b.getHeight()); |
| 167 | b = Bitmap.createScaledBitmap(b, b.getWidth() * GL11.GL_MAX_TEXTURE_SIZE / maxEdge, |
| 168 | b.getHeight() * GL11.GL_MAX_TEXTURE_SIZE / maxEdge, false); |
| 169 | } |
| 170 | |
| 171 | // Not called often because most modes save image data non-rotated. |
| 172 | if (orientation != 0 && b != null) { |
| 173 | Matrix m = new Matrix(); |
| 174 | m.setRotate(orientation); |
| 175 | b = Bitmap.createBitmap(b, 0, 0, b.getWidth(), b.getHeight(), m, false); |
| 176 | } |
| 177 | |
| 178 | return b; |
| 179 | } |
| 180 | |
| 181 | /** |
| 182 | * Loads the thumbnail of a video. |
| 183 | * |
| 184 | * @param path The path to the video file. |
| 185 | * @return {@code null} if the loading failed. |
| 186 | */ |
| 187 | public static Bitmap loadVideoThumbnail(String path) { |
| 188 | Bitmap bitmap = null; |
| 189 | MediaMetadataRetriever retriever = new MediaMetadataRetriever(); |
| 190 | try { |
| 191 | retriever.setDataSource(path); |
| 192 | byte[] data = retriever.getEmbeddedPicture(); |
| 193 | if (data != null) { |
| 194 | bitmap = BitmapFactory.decodeByteArray(data, 0, data.length); |
| 195 | } |
| 196 | if (bitmap == null) { |
| 197 | bitmap = retriever.getFrameAtTime(); |
| 198 | } |
| 199 | } catch (IllegalArgumentException e) { |
| 200 | Log.e(TAG, "MediaMetadataRetriever.setDataSource() fail:" + e.getMessage()); |
| 201 | } |
| 202 | retriever.release(); |
| 203 | return bitmap; |
| 204 | } |
| 205 | } |