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implemented Creative Voice File format.

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morkt 2016-05-30 15:41:15 +04:00
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commit 0d6e3f9a97
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ArcFormats/AudioVOC.cs Normal file
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//! \file AudioVOC.cs
//! \date Sun May 29 03:01:14 2016
//! \brief Creative Voice 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 GameRes.Utility;
namespace GameRes.Formats.Creative
{
internal sealed class VocReader : IDisposable
{
int m_version;
int m_header_size;
BinaryReader m_input;
WaveFormat m_format;
public WaveFormat Format { get { return m_format; } }
public VocReader (Stream input, byte[] header)
{
m_header_size = LittleEndian.ToUInt16 (header, 0x14);
if (m_header_size < 0x1A)
throw new InvalidFormatException();
m_version = LittleEndian.ToUInt16 (header, 0x16);
m_input = new ArcView.Reader (input);
}
public Stream ConvertToPcm ()
{
m_input.BaseStream.Position = m_header_size;
bool format_read = false;
var pcm = new MemoryStream();
try
{
for (;;)
{
int block_type = m_input.BaseStream.ReadByte();
if (-1 == block_type || 0 == block_type)
break;
int block_size = m_input.ReadUInt16();
block_size |= m_input.ReadByte() << 16;
uint freq;
int codec = -1;
switch (block_type)
{
case 1:
freq = m_input.ReadByte();
codec = m_input.ReadByte();
Copy (block_size-2, pcm);
m_format.Channels = 1;
m_format.SamplesPerSecond = 1000000u / (256u - freq);
m_format.BitsPerSample = 8;
format_read = true;
break;
case 2:
Copy (block_size, pcm);
break;
case 8:
freq = m_input.ReadUInt16();
codec = m_input.ReadByte();
m_format.Channels = (ushort)(m_input.ReadByte()+1);
m_format.SamplesPerSecond = 256000000u / (Format.Channels * (65536u - freq));
m_format.BitsPerSample = 8;
format_read = true;
break;
case 9:
m_format.SamplesPerSecond = m_input.ReadUInt32();
m_format.BitsPerSample = m_input.ReadByte();
m_format.Channels = (ushort)(m_input.ReadByte()+1);
codec = m_input.ReadUInt16();
format_read = true;
m_input.ReadInt32();
Copy (block_size-12, pcm);
break;
default:
m_input.BaseStream.Seek (block_size, SeekOrigin.Current);
break;
}
if (codec != -1)
{
if (0 == codec)
{
m_format.FormatTag = 1;
}
else if (4 == codec)
{
m_format.FormatTag = 1;
m_format.BitsPerSample = 16;
}
else if (7 == codec)
{
m_format.FormatTag = 7;
}
else
throw new NotImplementedException();
}
}
if (!format_read || 0 == Format.Channels || 0 == pcm.Length)
throw new InvalidFormatException();
m_format.BlockAlign = (ushort)(m_format.Channels * m_format.BitsPerSample / 8);
m_format.AverageBytesPerSecond = m_format.SamplesPerSecond * m_format.BlockAlign;
pcm.Position = 0;
return pcm;
}
catch
{
pcm.Dispose();
throw;
}
}
byte[] m_buffer = null;
void Copy (int block_size, Stream output)
{
if (null == m_buffer || m_buffer.Length < block_size)
m_buffer = new byte[block_size];
if (block_size != m_input.Read (m_buffer, 0, block_size))
throw new EndOfStreamException();
output.Write (m_buffer, 0, block_size);
}
#region IDisposable Members
bool _disposed = false;
public void Dispose ()
{
if (!_disposed)
{
m_input.Dispose();
_disposed = true;
}
}
#endregion
}
[Export(typeof(AudioFormat))]
public class VocAudio : AudioFormat
{
public override string Tag { get { return "VOC"; } }
public override string Description { get { return "Creative Voice File"; } }
public override uint Signature { get { return 0x61657243; } } // 'Crea'
public override SoundInput TryOpen (Stream file)
{
var header = new byte[0x1A];
if (header.Length != file.Read (header, 0, header.Length))
return null;
if (!Binary.AsciiEqual (header, 0, "Creative Voice File\x1A"))
return null;
using (var reader = new VocReader (file, header))
{
var pcm = reader.ConvertToPcm();
if (null == pcm)
return null;
return new RawPcmInput (pcm, reader.Format);
}
}
}
}