src/Tizen.Multimedia.Metadata/Interop/Interop.MetadataExtractor.cs

   1 using System;
   2 using System.Runtime.InteropServices;
   3 using Tizen.Multimedia;
   4
   5 internal static partial class Interop
   6 {
   7     internal static partial class MetadataExtractor
   8     {
   9         [DllImport(Libraries.MetadataExtractor, EntryPoint = "metadata_extractor_create")]
  10         internal static extern MetadataExtractorError Create(out IntPtr handle);
  11
  12         [DllImport(Libraries.MetadataExtractor, EntryPoint = "metadata_extractor_set_path")]
  13         internal static extern MetadataExtractorError SetPath(IntPtr handle, string path);
  14
  15         [DllImport(Libraries.MetadataExtractor, EntryPoint = "metadata_extractor_set_buffer")]
  16         internal static extern MetadataExtractorError SetBuffer(IntPtr handle, IntPtr buffer, int size);
  17
  18         [DllImport(Libraries.MetadataExtractor, EntryPoint = "metadata_extractor_destroy")]
  19         internal static extern MetadataExtractorError Destroy(IntPtr handle);
  20
  21         [DllImport(Libraries.MetadataExtractor, EntryPoint = "metadata_extractor_get_metadata")]
  22         private static extern MetadataExtractorError GetMetadata(IntPtr handle, MetadataExtractorAttr attribute, out IntPtr value);
  23
  24         internal static string GetMetadata(IntPtr handle, MetadataExtractorAttr attr)
  25         {
  26             IntPtr valuePtr = IntPtr.Zero;
  27
  28             try
  29             {
  30                 var ret = GetMetadata(handle, attr, out valuePtr);
  31                 MetadataExtractorRetValidator.ThrowIfError(ret, "Failed to get value for " + attr);
  32                 return Marshal.PtrToStringAnsi(valuePtr);
  33             }
  34             finally
  35             {
  36                 Libc.Free(valuePtr);
  37             }
  38         }
  39
  40         [DllImport(Libraries.MetadataExtractor, EntryPoint = "metadata_extractor_get_artwork")]
  41         internal static extern MetadataExtractorError GetArtwork(IntPtr handle, out IntPtr artwork,
  42             out int size, out IntPtr mimeType);
  43
  44         [DllImport(Libraries.MetadataExtractor, EntryPoint = "metadata_extractor_get_frame")]
  45         internal static extern MetadataExtractorError GetFrame(IntPtr handle, out IntPtr frame, out int size);
  46
  47         [DllImport(Libraries.MetadataExtractor, EntryPoint = "metadata_extractor_get_synclyrics")]
  48         internal static extern MetadataExtractorError GetSynclyrics(IntPtr handle, int index,
  49             out uint timeStamp, out IntPtr lyrics);
  50
  51         [DllImport(Libraries.MetadataExtractor, EntryPoint = "metadata_extractor_get_frame_at_time")]
  52         internal static extern MetadataExtractorError GetFrameAtTime(IntPtr handle, uint timeStamp,
  53             bool isAccurate, out IntPtr frame, out int size);
  54     }
  55 }