src/Tizen.Multimedia.Metadata/Interop/Interop.MetadataExtractor.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 using System.Runtime.InteropServices;
  19 using Tizen.Multimedia;
  20
  21 internal static partial class Interop
  22 {
  23     internal static partial class MetadataExtractor
  24     {
  25         [DllImport(Libraries.MetadataExtractor, EntryPoint = "metadata_extractor_create")]
  26         internal static extern MetadataExtractorError Create(out IntPtr handle);
  27
  28         [DllImport(Libraries.MetadataExtractor, EntryPoint = "metadata_extractor_set_path")]
  29         internal static extern MetadataExtractorError SetPath(IntPtr handle, string path);
  30
  31         [DllImport(Libraries.MetadataExtractor, EntryPoint = "metadata_extractor_set_buffer")]
  32         internal static extern MetadataExtractorError SetBuffer(IntPtr handle, IntPtr buffer, int size);
  33
  34         [DllImport(Libraries.MetadataExtractor, EntryPoint = "metadata_extractor_destroy")]
  35         internal static extern MetadataExtractorError Destroy(IntPtr handle);
  36
  37         [DllImport(Libraries.MetadataExtractor, EntryPoint = "metadata_extractor_get_metadata")]
  38         private static extern MetadataExtractorError GetMetadata(IntPtr handle, MetadataExtractorAttr attribute, out IntPtr value);
  39
  40         internal static string GetMetadata(IntPtr handle, MetadataExtractorAttr attr)
  41         {
  42             IntPtr valuePtr = IntPtr.Zero;
  43
  44             try
  45             {
  46                 var ret = GetMetadata(handle, attr, out valuePtr);
  47                 MetadataExtractorRetValidator.ThrowIfError(ret, "Failed to get value for " + attr);
  48                 return Marshal.PtrToStringAnsi(valuePtr);
  49             }
  50             finally
  51             {
  52                 Libc.Free(valuePtr);
  53             }
  54         }
  55
  56         [DllImport(Libraries.MetadataExtractor, EntryPoint = "metadata_extractor_get_artwork")]
  57         internal static extern MetadataExtractorError GetArtwork(IntPtr handle, out IntPtr artwork,
  58             out int size, out IntPtr mimeType);
  59
  60         [DllImport(Libraries.MetadataExtractor, EntryPoint = "metadata_extractor_get_frame")]
  61         internal static extern MetadataExtractorError GetFrame(IntPtr handle, out IntPtr frame, out int size);
  62
  63         [DllImport(Libraries.MetadataExtractor, EntryPoint = "metadata_extractor_get_synclyrics")]
  64         internal static extern MetadataExtractorError GetSynclyrics(IntPtr handle, int index,
  65             out uint timeStamp, out IntPtr lyrics);
  66
  67         [DllImport(Libraries.MetadataExtractor, EntryPoint = "metadata_extractor_get_frame_at_time")]
  68         internal static extern MetadataExtractorError GetFrameAtTime(IntPtr handle, uint timeStamp,
  69             bool isAccurate, out IntPtr frame, out int size);
  70     }
  71 }