src/Tizen.Multimedia/Common.Internal/IBufferOwner.cs

   1 /*
   2  * Copyright (c) 2016 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
  19 namespace Tizen.Multimedia
  20 {
  21     internal enum MediaBufferAccessMode
  22     {
  23         Read,
  24         Write
  25     }
  26
  27     internal interface IBufferOwner
  28     {
  29         bool IsBufferAccessible(object buffer, MediaBufferAccessMode accessMode);
  30
  31         bool IsDisposed { get; }
  32     }
  33
  34     internal static class BufferOwnerExtensions
  35     {
  36         internal static void ValidateBufferReadable(this IBufferOwner bufferOwner, IMediaBuffer buffer)
  37         {
  38             if (bufferOwner.IsDisposed)
  39             {
  40                 throw new ObjectDisposedException(bufferOwner.GetType().Name);
  41             }
  42
  43             if (!bufferOwner.IsBufferAccessible(buffer, MediaBufferAccessMode.Read))
  44             {
  45                 throw new InvalidOperationException("The buffer is not in the readable state.");
  46             }
  47         }
  48
  49         internal static void ValidateBufferWritable(this IBufferOwner bufferOwner, IMediaBuffer buffer)
  50         {
  51             if (bufferOwner.IsDisposed)
  52             {
  53                 throw new ObjectDisposedException(bufferOwner.GetType().Name);
  54             }
  55
  56             if (!bufferOwner.IsBufferAccessible(buffer, MediaBufferAccessMode.Write))
  57             {
  58                 throw new InvalidOperationException("The buffer is not in the writable state.");
  59             }
  60         }
  61     }
  62
  63 }