GARbro-mirror/ArcFormats/AudioWMA.cs
morkt f9eb77d0a4 added WmaFormat implementation.
not included into project since it requires updated NAudio version which
is not available via nuget.
2016-10-24 20:05:41 +04:00

104 lines
3.7 KiB
C#

//! \file AudioWMA.cs
//! \date Sun Oct 23 21:29:19 2016
//! \brief Windows Media Audio format.
//
// Copyright (C) 2016 by morkt
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.
//
using System;
using System.ComponentModel.Composition;
using System.IO;
using NAudio.Wave;
namespace GameRes.Formats
{
[Export(typeof(AudioFormat))]
public class WmaAudio : AudioFormat
{
public override string Tag { get { return "WMA"; } }
public override string Description { get { return "Windows Media Audio format"; } }
public override uint Signature { get { return 0x75B22630; } }
public override bool CanWrite { get { return false; } }
public override SoundInput TryOpen (IBinaryStream file)
{
return new WmaInput (file.AsStream);
}
}
public class WmaInput : SoundInput
{
int m_bitrate;
MediaFoundationReader m_reader;
public override long Position
{
get { return m_reader.Position; }
set { m_reader.Position = value; }
}
public override bool CanSeek { get { return true; } }
public override int SourceBitrate
{
get { return m_bitrate; }
}
public override string SourceFormat { get { return "wma"; } }
public WmaInput (Stream file) : base (file)
{
m_reader = new StreamMediaFoundationReader (file);
m_bitrate = m_reader.WaveFormat.AverageBytesPerSecond * 8;
var format = new GameRes.WaveFormat();
format.FormatTag = (ushort)m_reader.WaveFormat.Encoding;
format.Channels = (ushort)m_reader.WaveFormat.Channels;
format.SamplesPerSecond = (uint)m_reader.WaveFormat.SampleRate;
format.BitsPerSample = (ushort)m_reader.WaveFormat.BitsPerSample;
format.BlockAlign = (ushort)m_reader.BlockAlign;
format.AverageBytesPerSecond = (uint)m_reader.WaveFormat.AverageBytesPerSecond;
this.Format = format;
this.PcmSize = m_reader.Length;
}
public override int Read (byte[] buffer, int offset, int count)
{
return m_reader.Read (buffer, offset, count);
}
#region IDisposable Members
bool _wma_disposed;
protected override void Dispose (bool disposing)
{
if (!_wma_disposed)
{
if (disposing)
{
m_reader.Dispose();
}
_wma_disposed = true;
base.Dispose (disposing);
}
}
#endregion
}
}