src/Tizen.Multimedia.Remoting/WebRTC/MediaPacketSourceConfiguration.cs

   1 /*
   2  * Copyright (c) 2021 Samsung Electronics Co., Ltd All Rights Reserved
   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 using System;
  18 using static Interop;
  19
  20 namespace Tizen.Multimedia.Remoting
  21 {
  22     /// <summary>
  23     /// Provides means to configure properties and handle events for <see cref="MediaPacketSource"/>.
  24     /// </summary>
  25     /// <seealso cref="MediaPacketSource"/>
  26     /// <since_tizen> 9 </since_tizen>
  27     public class MediaPacketSourceConfiguration
  28     {
  29         private readonly MediaPacketSource _owner;
  30         NativeWebRTC.MediaPacketBufferStatusCallback _mediaPacketBufferStatusChangedCallback;
  31
  32         internal MediaPacketSourceConfiguration(MediaPacketSource owner)
  33         {
  34             _owner = owner;
  35         }
  36
  37         /// <summary>
  38         /// Occurs when the buffer underruns or overflows.
  39         /// </summary>
  40         /// <remarks>The event handler will be executed on an internal thread.</remarks>
  41         /// <since_tizen> 9 </since_tizen>
  42         public event EventHandler<MediaPacketBufferStatusChangedEventArgs> BufferStatusChanged;
  43
  44         private IntPtr Handle => _owner.WebRtc.Handle;
  45
  46         private uint SourceId => _owner.SourceId.Value;
  47
  48         internal void OnWebRTCSet()
  49         {
  50             if (_mediaPacketBufferStatusChangedCallback == null)
  51             {
  52                 RegisterBufferStatusChangedCallback();
  53             }
  54         }
  55
  56         internal void OnWebRTCUnset()
  57         {
  58             if (_mediaPacketBufferStatusChangedCallback != null)
  59             {
  60                 UnregisterBufferStatusChangedCallback();
  61             }
  62         }
  63
  64         private void RegisterBufferStatusChangedCallback()
  65         {
  66             _mediaPacketBufferStatusChangedCallback = (sourceId_, state, _) =>
  67             {
  68                 Log.Info(WebRTCLog.Tag, $"sourceId:{sourceId_}, state:{state}");
  69
  70                 BufferStatusChanged?.Invoke(this, new MediaPacketBufferStatusChangedEventArgs(sourceId_, state));
  71             };
  72
  73             NativeWebRTC.SetBufferStateChangedCb(Handle, SourceId, _mediaPacketBufferStatusChangedCallback, IntPtr.Zero).
  74                 ThrowIfFailed("Failed to set buffer status changed callback.");
  75         }
  76
  77         private void UnregisterBufferStatusChangedCallback()
  78         {
  79             NativeWebRTC.UnsetBufferStateChangedCb(Handle, SourceId).
  80                 ThrowIfFailed("Failed to unset buffer status changed callback.");
  81         }
  82     }
  83 }