2 * Copyright (c) 2019 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 System.Diagnostics;
20 namespace Tizen.Multimedia
23 /// Provides the ability to control audio ducking.
25 /// <seealso cref="AudioManager"/>
26 /// <since_tizen> 6 </since_tizen>
27 public sealed class AudioDucking : IDisposable
29 private AudioDuckingHandle _handle;
30 private bool _disposed = false;
31 private Interop.AudioDucking.DuckingStateChangedCallback _duckingStateChangedCallback;
34 /// Initializes a new instance of the <see cref="AudioDucking"/> class with <see cref="AudioStreamType"/>.
36 /// <param name="targetType">The type of sound stream to be affected by this new instance.</param>
37 /// <exception cref="ArgumentException"><paramref name="targetType"/> is invalid.</exception>
38 /// <exception cref="InvalidOperationException">Operation failed; internal error.</exception>
39 /// <since_tizen> 6 </since_tizen>
40 public AudioDucking(AudioStreamType targetType)
42 ValidationUtil.ValidateEnum(typeof(AudioStreamType), targetType, nameof(targetType));
44 _duckingStateChangedCallback = (IntPtr ducking, bool isDucked, IntPtr _) =>
46 DuckingStateChanged?.Invoke(this,
47 new AudioDuckingStateChangedEventArgs(isDucked));
50 Interop.AudioDucking.Create(targetType, _duckingStateChangedCallback,
51 IntPtr.Zero, out _handle).ThrowIfError("Unable to create stream ducking");
53 Debug.Assert(_handle != null);
57 /// Occurs when the ducking state is changed.
59 /// <since_tizen> 6 </since_tizen>
60 public event EventHandler<AudioDuckingStateChangedEventArgs> DuckingStateChanged;
63 /// Gets the ducking state of the stream.
65 /// <value>true if the audio stream is ducked; otherwise, false.</value>
66 /// <exception cref="InvalidOperationException">Operation failed; internal error.</exception>
67 /// <exception cref="ObjectDisposedException">The <see cref="AudioDucking"/> has already been disposed of.</exception>
68 /// <since_tizen> 6 </since_tizen>
75 throw new ObjectDisposedException(nameof(AudioDucking));
78 Interop.AudioDucking.IsDucked(Handle, out bool isDucked).
79 ThrowIfError("Failed to get the running state of the device");
86 /// Activate audio ducking
88 /// <param name="duration">The duration(milisecond) for ducking.</param>
89 /// <param name="ratio">The volume ratio when ducked.</param>
90 /// <remarks>To activate ducking, the specified privilege is required.</remarks>
91 /// <privilege>http://tizen.org/privilege/volume.set</privilege>
92 /// <exception cref="ArgumentOutOfRangeException">
93 /// <paramref name="duration"/> is less than 0 or greater than 3000.<br/>
95 /// <paramref name="ratio"/> is less than 0.0 or greater than or equal to 1.0.<br/>
97 /// <exception cref="InvalidOperationException">
98 /// Operation failed; internal error.<br/>
100 /// The target stream is already ducked.
102 /// <exception cref="UnauthorizedAccessException">The caller does not have required privilege to set volume.</exception>
103 /// <exception cref="ObjectDisposedException">The <see cref="AudioDucking"/> has already been disposed of.</exception>
104 /// <since_tizen> 6 </since_tizen>
105 public void Activate(uint duration, double ratio)
109 throw new ObjectDisposedException(nameof(AudioDucking));
112 if (duration < 0 || duration > 3000)
114 throw new ArgumentOutOfRangeException(nameof(duration), duration, "Valid range : 0 <= duration <= 3000");
117 if (ratio < 0.0 || ratio >= 1.0)
119 throw new ArgumentOutOfRangeException(nameof(ratio), ratio, "Valid range : 0 <= ratio < 1.0");
122 Interop.AudioDucking.Activate(Handle, duration, ratio).
123 ThrowIfError("Failed to activate ducking");
127 /// Deactivate audio ducking
129 /// <remarks>To deactivate ducking, the specified privilege is required.</remarks>
130 /// <privilege>http://tizen.org/privilege/volume.set</privilege>
131 /// <exception cref="InvalidOperationException">
132 /// Operation failed; internal error.<br/>
134 /// The target stream is already unducked.
136 /// <exception cref="UnauthorizedAccessException">The caller does not have required privilege to set volume.</exception>
137 /// <exception cref="ObjectDisposedException">The <see cref="AudioDucking"/> has already been disposed of.</exception>
138 /// <since_tizen> 6 </since_tizen>
139 public void Deactivate()
143 throw new ObjectDisposedException(nameof(AudioDucking));
146 Interop.AudioDucking.Deactivate(Handle).
147 ThrowIfError("Failed to deactivate ducking");
151 /// Releases all resources used by the <see cref="AudioDucking"/>.
153 /// <since_tizen> 6 </since_tizen>
154 public void Dispose()
167 GC.SuppressFinalize(this);
170 internal AudioDuckingHandle Handle
176 throw new ObjectDisposedException(nameof(AudioDucking));