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1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 package org.chromium.shape_detection; | 5 package org.chromium.shape_detection; |
6 | 6 |
7 import android.graphics.Bitmap; | 7 import android.graphics.Bitmap; |
8 import android.graphics.PointF; | 8 import android.graphics.PointF; |
9 import android.media.FaceDetector; | 9 import android.media.FaceDetector; |
10 import android.media.FaceDetector.Face; | 10 import android.media.FaceDetector.Face; |
11 import android.os.AsyncTask; | 11 import android.os.AsyncTask; |
12 | 12 |
13 import org.chromium.base.Log; | |
14 import org.chromium.gfx.mojom.RectF; | 13 import org.chromium.gfx.mojom.RectF; |
15 import org.chromium.mojo.system.MojoException; | 14 import org.chromium.mojo.system.MojoException; |
16 import org.chromium.mojo.system.SharedBufferHandle; | |
17 import org.chromium.mojo.system.SharedBufferHandle.MapFlags; | |
18 import org.chromium.shape_detection.mojom.FaceDetection; | 15 import org.chromium.shape_detection.mojom.FaceDetection; |
19 import org.chromium.shape_detection.mojom.FaceDetectionResult; | 16 import org.chromium.shape_detection.mojom.FaceDetectionResult; |
20 import org.chromium.shape_detection.mojom.FaceDetectorOptions; | 17 import org.chromium.shape_detection.mojom.FaceDetectorOptions; |
21 import org.chromium.shape_detection.mojom.Landmark; | 18 import org.chromium.shape_detection.mojom.Landmark; |
22 | 19 |
23 import java.nio.ByteBuffer; | |
24 | |
25 /** | 20 /** |
26 * Android implementation of the FaceDetection service defined in | 21 * Android implementation of the FaceDetection service defined in |
27 * services/shape_detection/public/interfaces/facedetection.mojom | 22 * services/shape_detection/public/interfaces/facedetection.mojom |
28 */ | 23 */ |
29 public class FaceDetectionImpl implements FaceDetection { | 24 public class FaceDetectionImpl implements FaceDetection { |
30 private static final String TAG = "FaceDetectionImpl"; | 25 private static final String TAG = "FaceDetectionImpl"; |
31 private static final int MAX_FACES = 32; | 26 private static final int MAX_FACES = 32; |
32 private final boolean mFastMode; | 27 private final boolean mFastMode; |
33 private final int mMaxFaces; | 28 private final int mMaxFaces; |
34 | 29 |
35 FaceDetectionImpl(FaceDetectorOptions options) { | 30 FaceDetectionImpl(FaceDetectorOptions options) { |
36 mFastMode = options.fastMode; | 31 mFastMode = options.fastMode; |
37 mMaxFaces = Math.min(options.maxDetectedFaces, MAX_FACES); | 32 mMaxFaces = Math.min(options.maxDetectedFaces, MAX_FACES); |
38 } | 33 } |
39 | 34 |
40 @Override | 35 @Override |
41 public void detect(SharedBufferHandle frameData, final int width, final int
height, | 36 public void detect(org.chromium.skia.mojom.Bitmap bitmapData, final DetectRe
sponse callback) { |
42 final DetectResponse callback) { | 37 // TODO(junwei.fu): Use |bitmapData| directly for |unPremultipliedBitmap
| to spare a copy |
43 final long numPixels = (long) width * height; | 38 // if the bitmap pixel format is RGB_565, the ARGB_8888 Bitmap doesn't n
eed to be created |
44 // TODO(xianglu): https://crbug.com/670028 homogeneize overflow checking
. | 39 // in this case, https://crbug.com/684930. |
45 if (!frameData.isValid() || width <= 0 || height <= 0 || numPixels > (Lo
ng.MAX_VALUE / 4)) { | 40 Bitmap bitmap = BitmapUtils.convertToBitmap(bitmapData); |
46 Log.d(TAG, "Invalid argument(s)."); | |
47 callback.call(new FaceDetectionResult[0]); | |
48 return; | |
49 } | |
50 | |
51 ByteBuffer imageBuffer = frameData.map(0, numPixels * 4, MapFlags.none()
); | |
52 if (imageBuffer.capacity() <= 0) { | |
53 Log.d(TAG, "Failed to map from SharedBufferHandle."); | |
54 callback.call(new FaceDetectionResult[0]); | |
55 return; | |
56 } | |
57 | |
58 Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_88
88); | |
59 | |
60 // An int array is needed to construct a Bitmap. However the Bytebuffer | |
61 // we get from |sharedBufferHandle| is directly allocated and does not | |
62 // have a supporting array. Therefore we need to copy from |imageBuffer| | |
63 // to create this intermediate Bitmap. | |
64 // TODO(xianglu): Consider worker pool as appropriate threads. | |
65 // http://crbug.com/655814 | |
66 bitmap.copyPixelsFromBuffer(imageBuffer); | |
67 | 41 |
68 // A Bitmap must be in 565 format for findFaces() to work. See | 42 // A Bitmap must be in 565 format for findFaces() to work. See |
69 // http://androidxref.com/7.0.0_r1/xref/frameworks/base/media/java/andro
id/media/FaceDetector.java#124 | 43 // http://androidxref.com/7.0.0_r1/xref/frameworks/base/media/java/andro
id/media/FaceDetector.java#124 |
70 // | 44 // |
71 // It turns out that FaceDetector is not able to detect correctly if | 45 // It turns out that FaceDetector is not able to detect correctly if |
72 // simply using pixmap.setConfig(). The reason might be that findFaces() | 46 // simply using pixmap.setConfig(). The reason might be that findFaces() |
73 // needs non-premultiplied ARGB arrangement, while the alpha type in the | 47 // needs non-premultiplied ARGB arrangement, while the alpha type in the |
74 // original image is premultiplied. We can use getPixels() which does | 48 // original image is premultiplied. We can use getPixels() which does |
75 // the unmultiplication while copying to a new array. See | 49 // the unmultiplication while copying to a new array. See |
76 // http://androidxref.com/7.0.0_r1/xref/frameworks/base/graphics/java/an
droid/graphics/Bitmap.java#538 | 50 // http://androidxref.com/7.0.0_r1/xref/frameworks/base/graphics/java/an
droid/graphics/Bitmap.java#538 |
| 51 final int width = bitmapData.width; |
| 52 final int height = bitmapData.height; |
77 int[] pixels = new int[width * height]; | 53 int[] pixels = new int[width * height]; |
78 bitmap.getPixels(pixels, 0, width, 0, 0, width, height); | 54 bitmap.getPixels(pixels, 0, width, 0, 0, width, height); |
79 final Bitmap unPremultipliedBitmap = | 55 final Bitmap unPremultipliedBitmap = |
80 Bitmap.createBitmap(pixels, width, height, Bitmap.Config.RGB_565
); | 56 Bitmap.createBitmap(pixels, width, height, Bitmap.Config.RGB_565
); |
81 | 57 |
82 // FaceDetector creation and findFaces() might take a long time and trig
ger a | 58 // FaceDetector creation and findFaces() might take a long time and trig
ger a |
83 // "StrictMode policy violation": they should happen in a background thr
ead. | 59 // "StrictMode policy violation": they should happen in a background thr
ead. |
84 AsyncTask.THREAD_POOL_EXECUTOR.execute(new Runnable() { | 60 AsyncTask.THREAD_POOL_EXECUTOR.execute(new Runnable() { |
85 @Override | 61 @Override |
86 public void run() { | 62 public void run() { |
(...skipping 28 matching lines...) Expand all Loading... |
115 } | 91 } |
116 | 92 |
117 @Override | 93 @Override |
118 public void close() {} | 94 public void close() {} |
119 | 95 |
120 @Override | 96 @Override |
121 public void onConnectionError(MojoException e) { | 97 public void onConnectionError(MojoException e) { |
122 close(); | 98 close(); |
123 } | 99 } |
124 } | 100 } |
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