src/Tizen.Multimedia.Util/Interop/Interop.ThumbnailExtractor.cs

   1 using System;
   2 using System.Runtime.InteropServices;
   3 using Tizen;
   4 using Tizen.Multimedia.Util;
   5
   6 internal static partial class Interop
   7 {
   8     internal static class ThumbnailExtractor
   9     {
  10         [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
  11         public delegate void ThumbnailExtractCallback(ThumbnailExtractorError error, string requestId,
  12             int thumbWidth, int thumbHeight, IntPtr thumbData, int thumbSize, IntPtr userData);
  13
  14         [DllImport(Libraries.ThumbnailExtractor, EntryPoint = "thumbnail_util_create")]
  15         internal static extern ThumbnailExtractorError Create(out ThumbnailExtractorHandle handle);
  16
  17         [DllImport(Libraries.ThumbnailExtractor, EntryPoint = "thumbnail_util_extract")]
  18         internal static extern ThumbnailExtractorError Extract(ThumbnailExtractorHandle handle,
  19             ThumbnailExtractCallback callback, IntPtr userData, out IntPtr requestId);
  20
  21         [DllImport(Libraries.ThumbnailExtractor, EntryPoint = "thumbnail_util_set_path")]
  22         internal static extern ThumbnailExtractorError SetPath(ThumbnailExtractorHandle handle, string path);
  23
  24         [DllImport(Libraries.ThumbnailExtractor, EntryPoint = "thumbnail_util_set_size")]
  25         internal static extern ThumbnailExtractorError SetSize(ThumbnailExtractorHandle handle, int width, int height);
  26
  27
  28         [DllImport(Libraries.ThumbnailExtractor, EntryPoint = "thumbnail_util_cancel")]
  29         internal static extern ThumbnailExtractorError Cancel(ThumbnailExtractorHandle handle, string requestId);
  30
  31         [DllImport(Libraries.ThumbnailExtractor, EntryPoint = "thumbnail_util_destroy")]
  32         internal static extern ThumbnailExtractorError Destroy(IntPtr handle);
  33     }
  34
  35     internal class ThumbnailExtractorHandle : CriticalHandle
  36     {
  37         protected ThumbnailExtractorHandle() : base(IntPtr.Zero)
  38         {
  39         }
  40
  41         public override bool IsInvalid => handle == IntPtr.Zero;
  42
  43         protected override bool ReleaseHandle()
  44         {
  45             var result = ThumbnailExtractor.Destroy(handle);
  46
  47             if (result == ThumbnailExtractorError.None)
  48             {
  49                 return true;
  50             }
  51
  52             Log.Error(GetType().Name, $"Failed to destroy handle : {result}");
  53             return false;
  54         }
  55     }
  56 }