FDK17プロジェクト/コード/03.サウンド/Cmp3.cs

   1 using System;
   2 using System.Collections.Generic;
   3 using System.Text;
   4 using System.Runtime.InteropServices;
   5 using System.IO;
   6 using System.Diagnostics;
   7 using System.Threading;
   8
   9
  10 namespace FDK
  11 {
  12         public unsafe class Cmp3 : SoundDecoder
  13         {
  14 //              static byte[] FOURCC = Encoding.ASCII.GetBytes( "SggO" );       // OggS の little endian
  15
  16
  17                 #region [ SoundDecoder.dll インポート（mpr 関連）]
  18                 //-----------------
  19                 [DllImport( "SoundDecoder.dll" )]
  20                 private static extern void mp3Close( int nHandle );
  21                 [DllImport( "SoundDecoder.dll" )]
  22                 private static extern int mp3Decode( int nHandle, IntPtr pDest, uint szDestSize, int bLoop );
  23                 [DllImport( "SoundDecoder.dll" )]
  24                 private static extern int mp3GetFormat( int nHandle, ref CWin32.WAVEFORMATEX wfx );
  25                 [DllImport( "SoundDecoder.dll" )]
  26                 private static extern uint mp3GetTotalPCMSize( int nHandle );
  27                 [DllImport( "SoundDecoder.dll" )]
  28                 private static extern int mp3Open( string fileName );
  29                 [DllImport( "SoundDecoder.dll" )]
  30                 private static extern int mp3Seek( int nHandle, uint dwPosition );
  31                 //-----------------
  32                 #endregion
  33
  34
  35                 public override int Open( string filename )
  36                 {
  37                         return mp3Open( filename );
  38                 }
  39                 public override int GetFormat( int nHandle, ref CWin32.WAVEFORMATEX wfx )
  40                 {
  41                         return mp3GetFormat( nHandle, ref wfx );
  42                 }
  43                 public override uint GetTotalPCMSize( int nHandle )
  44                 {
  45                         return mp3GetTotalPCMSize( nHandle );
  46                 }
  47                 public override int Seek( int nHandle, uint dwPosition )
  48                 {
  49                         return mp3Seek( nHandle, dwPosition );
  50                 }
  51                 public override int Decode( int nHandle, IntPtr pDest, uint szDestSize, int bLoop )
  52                 {
  53                         return mp3Decode( nHandle, pDest, szDestSize, bLoop );
  54                 }
  55
  56                 public override void Close( int nHandle )
  57                 {
  58                         mp3Close( nHandle );
  59                 }
  60
  61         }
  62 }