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
  35     internal static class BufferOwnerExtensions
  36     {
  37         internal static void ValidateBufferReadable(this IBufferOwner bufferOwner, IReadOnlyBuffer buffer)
  38         {
  39             if (bufferOwner.IsDisposed)
  40             {
  41                 throw new ObjectDisposedException(bufferOwner.GetType().Name);
  42             }
  43
  44             if (!bufferOwner.IsBufferAccessible(buffer, MediaBufferAccessMode.Read))
  45             {
  46                 throw new InvalidOperationException("The buffer is not in the readable state.");
  47             }
  48         }
  49
  50         internal static void ValidateBufferWritable(this IBufferOwner bufferOwner, IMediaBuffer buffer)
  51         {
  52             if (bufferOwner.IsDisposed)
  53             {
  54                 throw new ObjectDisposedException(bufferOwner.GetType().Name);
  55             }
  56
  57             if (!bufferOwner.IsBufferAccessible(buffer, MediaBufferAccessMode.Write))
  58             {
  59                 throw new InvalidOperationException("The buffer is not in writable state.");
  60             }
  61         }
  62     }
  63
  64 }