2 * Copyright (c) 2016 Samsung Electronics Co., Ltd All Rights Reserved
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
18 using static Interop.MediaVision.Surveillance;
20 namespace Tizen.Multimedia.Vision
23 /// Provides the ability to detect person appearance changes on image sources.
25 /// <feature>http://tizen.org/feature/vision.face_recognition</feature>
26 /// <feature>http://tizen.org/feature/vision.image_recognition</feature>
27 /// <seealso cref="PersonAppearanceDetectionConfiguration"/>
28 /// <since_tizen> 3 </since_tizen>
29 public class PersonAppearanceDetector : SurveillanceEngine
31 private const string KeyAppearedNumber = "NUMBER_OF_APPEARED_PERSONS";
32 private const string KeyDisappearedNumber = "NUMBER_OF_DISAPPEARED_PERSONS";
33 private const string KeyTrackedNumber = "NUMBER_OF_TRACKED_PERSONS";
34 private const string KeyAppearedLocations = "APPEARED_PERSONS_LOCATIONS";
35 private const string KeyDisappearedLocations = "DISAPPEARED_PERSONS_LOCATIONS";
36 private const string KeyTrackedLocations = "TRACKED_PERSONS_LOCATIONS";
38 private const string PersonAppearanceEventType = "MV_SURVEILLANCE_EVENT_PERSON_APPEARED_DISAPEARED";
41 /// Initializes a new instance of the <see cref="PersonAppearanceDetector"/> class.
43 /// <exception cref="NotSupportedException">The required features are not supported.</exception>
44 /// <since_tizen> 3 </since_tizen>
45 public PersonAppearanceDetector() : base(PersonAppearanceEventType)
50 /// Occurs when the any appearance changes detected.
52 /// <remarks>The event handler will be executed on an internal thread.</remarks>
53 /// <since_tizen> 3 </since_tizen>
54 public event EventHandler<PersonAppearanceDetectedEventArgs> Detected;
56 internal override void OnEventDetected(IntPtr trigger, IntPtr source, int streamId,
57 IntPtr result, IntPtr _)
61 Detected?.Invoke(this, CreatePersonAppearanceChangedEventArgs(result));
65 MultimediaLog.Error(MediaVisionLog.Tag, "Failed to invoke Recognized event.", e);
70 private PersonAppearanceDetectedEventArgs CreatePersonAppearanceChangedEventArgs(IntPtr result)
72 return new PersonAppearanceDetectedEventArgs(
73 GetResultAreas(result, KeyAppearedNumber, KeyAppearedLocations),
74 GetResultAreas(result, KeyDisappearedNumber, KeyDisappearedLocations),
75 GetResultAreas(result, KeyTrackedNumber, KeyTrackedLocations)
79 private static Rectangle[] GetResultAreas(IntPtr result, string countKey, string regionsKey)
82 GetResultValue(result, countKey, out count).Validate("Failed to get result");
84 var rects = new global::Interop.MediaVision.Rectangle[count];
87 GetResultValue(result, regionsKey, rects).Validate("Failed to get result");
90 return global::Interop.ToApiStruct(rects);
94 /// Adds <see cref="SurveillanceSource"/>.
96 /// <param name="source">The source used for recognition.</param>
97 /// <exception cref="ArgumentNullException"><paramref name="source"/> is null.</exception>
98 /// <exception cref="ObjectDisposedException">The <see cref="PersonAppearanceDetector"/> has already been disposed of.</exception>
99 /// <see cref="SurveillanceSource.Push(MediaVisionSource)"/>
100 /// <since_tizen> 3 </since_tizen>
101 public void AddSource(SurveillanceSource source)
103 AddSource(source, null);
107 /// Adds <see cref="SurveillanceSource"/> with the provided <see cref="PersonAppearanceDetectionConfiguration"/>.
109 /// <param name="source">The source used for recognition.</param>
110 /// <param name="config">The config for the <paramref name="source"/>. This value can be null.</param>
111 /// <exception cref="ArgumentNullException"><paramref name="source"/> is null.</exception>
112 /// <exception cref="ObjectDisposedException">
113 /// The <see cref="PersonAppearanceDetector"/> has already been disposed of.<br/>
115 /// <paramref name="config"/> has already been disposed of.
117 /// <see cref="SurveillanceSource.Push(MediaVisionSource)"/>
118 /// <since_tizen> 3 </since_tizen>
119 public void AddSource(SurveillanceSource source, PersonAppearanceDetectionConfiguration config)
121 InvokeAddSource(source, config);