GARbro-mirror/Legacy/Mermaid/AudioPWV.cs
2019-01-11 18:14:56 +04:00

106 lines
3.8 KiB
C#

//! \file AudioPWV.cs
//! \date 2019 Jan 10
//! \brief Mermaid compressed WAVE file.
//
// Copyright (C) 2019 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.ComponentModel.Composition;
using System.IO;
namespace GameRes.Formats.Mermaid
{
[Export(typeof(AudioFormat))]
public class PwvAudio : AudioFormat
{
public override string Tag { get { return "PWV"; } }
public override string Description { get { return "Mermaid compressed audio"; } }
public override uint Signature { get { return 0x46495200; } } // '\0RIF'
public override bool CanWrite { get { return false; } }
public override SoundInput TryOpen (IBinaryStream file)
{
if (!file.Name.HasExtension ("PWV"))
return null;
var header = file.ReadHeader (0x10);
if (!header.AsciiEqual (9, "WAVE"))
return null;
var output = new MemoryStream ((int)file.Length);
try
{
file.Position = 0;
Unpack (file, output);
output.Position = 0;
var wave = new WaveInput (output);
file.Dispose();
return wave;
}
catch
{
output.Dispose();
throw;
}
}
void Unpack (IBinaryStream input, Stream output)
{
var buffer = new byte[16];
int ctl;
while ((ctl = input.ReadByte()) != -1)
{
if (0 == ctl)
{
input.Read (buffer, 0, 16);
output.Write (buffer, 0, 16);
}
else if (1 == ctl)
{
for (int i = 0; i < 16; i += 2)
{
buffer[i] = input.ReadUInt8();
buffer[i+1] = 0;
}
output.Write (buffer, 0, 16);
}
else if (8 == ctl)
{
for (int i = 0; i < 16; i += 2)
{
buffer[i] = input.ReadUInt8();
buffer[i+1] = 0xFF;
}
output.Write (buffer, 0, 16);
}
else if (15 == ctl)
{
int count = input.ReadUInt8();
if (count > buffer.Length)
buffer = new byte[count];
input.Read (buffer, 0, count);
output.Write (buffer, 0, count);
}
else if (input.PeekByte() != -1)
throw new InvalidFormatException();
}
}
}
}