GARbro-mirror/Legacy/Pan/AudioNSF.cs

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2018-06-06 04:44:46 +08:00
//! \file AudioNSF.cs
//! \date 2018 Jun 05
//! \brief Pan engine PCM audio format.
//
// Copyright (C) 2018 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;
namespace GameRes.Formats.Pan
{
[Export(typeof(AudioFormat))]
public class NsfAudio : AudioFormat
{
public override string Tag { get { return "NSF"; } }
public override string Description { get { return "Pan engine PCM audio"; } }
public override uint Signature { get { return 0; } }
public override bool CanWrite { get { return false; } }
public NsfAudio ()
{
Signatures = new uint[] { 0x010001, 0x020001, 0 };
}
public override SoundInput TryOpen (IBinaryStream file)
{
if (!file.Name.HasExtension ("NSF"))
return null;
var header = file.ReadHeader (0x10);
var format = new WaveFormat {
FormatTag = header.ToUInt16 (0),
Channels = header.ToUInt16 (2),
SamplesPerSecond = header.ToUInt32 (4),
AverageBytesPerSecond = header.ToUInt16 (8),
BlockAlign = header.ToUInt16 (12),
BitsPerSample = header.ToUInt16 (14),
};
if (format.FormatTag != 1 ||
format.SamplesPerSecond * format.Channels * format.BitsPerSample / 8 != format.AverageBytesPerSecond)
return null;
var pcm = new StreamRegion (file.AsStream, 0x10);
return new RawPcmInput (pcm, format);
}
}
}