GARbro-mirror/ArcFormats/Entis/AudioMIO.cs

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//! \file AudioMIO.cs
//! \date Thu May 28 13:33:07 2015
//! \brief Entis audio format implementation.
//
// Copyright (C) 2015 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.Collections.Concurrent;
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using System.Collections.Generic;
using System.ComponentModel;
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using System.ComponentModel.Composition;
using System.Diagnostics;
using System.IO;
using System.Threading;
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using GameRes.Utility;
namespace GameRes.Formats.Entis
{
[Export(typeof(AudioFormat))]
public class MioAudio : AudioFormat
{
public override string Tag { get { return "MIO"; } }
public override string Description { get { return "Entis engine compressed audio format"; } }
public override uint Signature { get { return 0x69746e45u; } } // 'Enti'
public override SoundInput TryOpen (Stream file)
{
byte[] header = new byte[0x40];
if (header.Length != file.Read (header, 0, header.Length))
return null;
if (0x03000100 != LittleEndian.ToUInt32 (header, 8))
return null;
if (!Binary.AsciiEqual (header, 0x10, "Music Interleaved and Orthogonal transformed"))
return null;
return new MioInput (file);
}
}
public class MioInput : SoundInput
{
MioInfoHeader m_info;
long m_stream_pos;
int m_bitrate;
uint m_total_samples;
ERISADecodeContext m_pmioc;
MioDecoder m_pmiod;
Stream m_decoded_stream;
public int ChannelCount { get { return m_info.ChannelCount; } }
public uint BitsPerSample { get { return m_info.BitsPerSample; } }
public override int SourceBitrate { get { return m_bitrate; } }
public override string SourceFormat { get { return "mio"; } }
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#region Stream Members
public override bool CanSeek { get { return m_decoded_stream.CanSeek; } }
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public override long Position
{
get { return m_decoded_stream.Position; }
set { m_decoded_stream.Position = value; }
}
public override int Read (byte[] buffer, int offset, int count)
{
return Read_Threaded (buffer, offset, count);
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}
#endregion
public MioInput (Stream file) : base (file)
{
file.Position = 0x40;
using (var erif = new EriFile (file))
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{
var section = erif.ReadSection();
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if (section.Id != "Header " || section.Length <= 0 || section.Length > int.MaxValue)
throw new InvalidFormatException();
m_stream_pos = 0x50 + section.Length;
int header_size = (int)section.Length;
while (header_size > 8)
{
section = erif.ReadSection();
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header_size -= 8;
if (section.Length <= 0 || section.Length > header_size)
break;
if ("SoundInf" == section.Id)
{
m_info = new MioInfoHeader();
m_info.Version = erif.ReadInt32();
m_info.Transformation = (CvType)erif.ReadInt32();
m_info.Architecture = (EriCode)erif.ReadInt32();
m_info.ChannelCount = erif.ReadInt32();
m_info.SamplesPerSec = erif.ReadUInt32();
m_info.BlocksetCount = erif.ReadUInt32();
m_info.SubbandDegree = erif.ReadInt32();
m_info.AllSampleCount = erif.ReadUInt32();
m_info.LappedDegree = erif.ReadUInt32();
m_info.BitsPerSample = erif.ReadUInt32();
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break;
}
header_size -= (int)section.Length;
erif.BaseStream.Seek (section.Length, SeekOrigin.Current);
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}
if (null == m_info)
throw new InvalidFormatException ("MIO sound header not found");
erif.BaseStream.Position = m_stream_pos;
var stream_size = erif.FindSection ("Stream ");
m_stream_pos = erif.BaseStream.Position;
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m_pmiod = new MioDecoder (m_info);
if (EriCode.Nemesis != m_info.Architecture)
m_pmioc = new HuffmanDecodeContext (0x10000);
else
throw new NotImplementedException ("MIO Nemesis encoding not implemented");
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int pcm_bitrate = (int)(m_info.SamplesPerSec * BitsPerSample * ChannelCount);
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var format = new GameRes.WaveFormat();
format.FormatTag = 1;
format.Channels = (ushort)ChannelCount;
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format.SamplesPerSecond = m_info.SamplesPerSec;
format.BitsPerSample = (ushort)BitsPerSample;
format.BlockAlign = (ushort)(BitsPerSample/8*format.Channels);
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format.AverageBytesPerSecond = (uint)pcm_bitrate/8;
this.Format = format;
m_decoded_stream = LoadChunks (erif);
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if (0 != m_total_samples)
m_bitrate = (int)(stream_size * 8 * m_info.SamplesPerSec / m_total_samples);
this.PcmSize = m_total_samples * ChannelCount * BitsPerSample / 8;
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m_decoded_stream.Position = 0;
}
}
class MioChunk : MioDataHeader
{
public uint FirstSample;
public long Position;
public uint Size;
}
class ChunkStream : Stream
{
Stream m_source;
MioChunk m_chunk;
public ChunkStream (Stream source, MioChunk chunk)
{
m_source = source;
m_chunk = chunk;
m_source.Position = m_chunk.Position;
}
public override bool CanRead { get { return true; } }
public override bool CanWrite { get { return false; } }
public override bool CanSeek { get { return m_source.CanSeek; } }
public override long Length { get { return m_chunk.Size; } }
public override long Position
{
get { return m_source.Position-m_chunk.Position; }
set { Seek (value, SeekOrigin.Begin); }
}
public override long Seek (long offset, SeekOrigin origin)
{
if (origin == SeekOrigin.Begin)
offset += m_chunk.Position;
else if (origin == SeekOrigin.Current)
offset += m_source.Position;
else
offset += m_chunk.Position + m_chunk.Size;
if (offset < m_chunk.Position)
offset = m_chunk.Position;
m_source.Position = offset;
return offset - m_chunk.Position;
}
public override void Flush()
{
m_source.Flush();
}
public override int Read (byte[] buf, int index, int count)
{
long remaining = (m_chunk.Position + m_chunk.Size) - m_source.Position;
if (count > remaining)
count = (int)remaining;
if (count <= 0)
return 0;
return m_source.Read (buf, index, count);
}
public override void SetLength (long length)
{
throw new System.NotSupportedException ();
}
public override void Write (byte[] buffer, int offset, int count)
{
throw new System.NotSupportedException ();
}
public override void WriteByte (byte value)
{
throw new System.NotSupportedException ();
}
}
private Stream LoadChunks (EriFile erif)
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{
uint current_sample = 0;
List<MioChunk> chunks = new List<MioChunk>();
try
{
erif.BaseStream.Position = m_stream_pos;
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for (;;)
{
long chunk_length = erif.FindSection ("SoundStm");
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if (chunk_length > int.MaxValue)
throw new FileSizeException();
var chunk = new MioChunk();
chunk.FirstSample = current_sample;
chunk.Version = erif.ReadByte();
chunk.Flags = erif.ReadByte();
erif.ReadInt16();
chunk.SampleCount = erif.ReadUInt32();
chunk.Position = erif.BaseStream.Position;
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chunk.Size = (uint)(chunk_length - 8);
current_sample += chunk.SampleCount;
chunks.Add (chunk);
erif.BaseStream.Seek (chunk.Size, SeekOrigin.Current);
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}
}
catch (EndOfStreamException) { /* ignore EOF errors */ }
m_total_samples = current_sample;
if (0 == m_total_samples)
{
m_decode_finished = true;
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return Stream.Null;
}
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uint sample_bytes = (uint)ChannelCount * BitsPerSample / 8;
var total_bytes = m_total_samples * sample_bytes;
m_wait_handles = new WaitHandle[2] { m_available_chunk, m_decode_complete };
m_chunk_queue = new ConcurrentQueue<byte[]>();
m_worker = new BackgroundWorker();
m_worker.WorkerSupportsCancellation = true;
m_worker.DoWork += DoWork_Decode;
m_worker.RunWorkerAsync (chunks);
return new MemoryStream ((int)total_bytes);
}
bool m_decode_finished = false;
AutoResetEvent m_decode_complete = new AutoResetEvent (false);
AutoResetEvent m_available_chunk = new AutoResetEvent (false);
WaitHandle[] m_wait_handles;
ConcurrentQueue<byte[]> m_chunk_queue;
BackgroundWorker m_worker;
Exception m_decode_error = null;
private void DoWork_Decode (object sender, DoWorkEventArgs e)
{
try
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{
var worker = sender as BackgroundWorker;
var chunks = e.Argument as IEnumerable<MioChunk>;
uint sample_bytes = (uint)ChannelCount * BitsPerSample / 8;
foreach (var chunk in chunks)
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{
if (worker.CancellationPending)
{
e.Cancel = true;
break;
}
using (var input = new ChunkStream (Source, chunk))
{
var wave_buf = new byte[chunk.SampleCount * sample_bytes];
m_pmioc.AttachInputFile (input);
if (!m_pmiod.DecodeSound (m_pmioc, chunk, wave_buf, 0))
throw new InvalidFormatException();
m_chunk_queue.Enqueue (wave_buf);
m_available_chunk.Set();
}
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}
}
catch (Exception X)
{
Trace.WriteLine (X.Message, "[MIO]");
m_decode_error = X;
}
finally
{
m_decode_complete.Set();
}
}
private int Read_Threaded (byte[] buf, int idx, int count)
{
var current_pos = Position;
int total_read = 0;
if (current_pos < m_decoded_stream.Length)
{
int available_bytes = (int)(m_decoded_stream.Length - current_pos);
int read = m_decoded_stream.Read (buf, idx, Math.Min (count, available_bytes));
idx += read;
count -= read;
total_read += read;
}
if (count > 0 && (!m_decode_finished || m_chunk_queue.Count > 0))
{
current_pos = Position;
m_decoded_stream.Seek (0, SeekOrigin.End);
for (;;)
{
byte[] wave_buf = null;
while (m_chunk_queue.TryDequeue (out wave_buf))
{
m_decoded_stream.Write (wave_buf, 0, wave_buf.Length);
if (current_pos + count <= m_decoded_stream.Length)
break;
}
if (m_decode_finished || (current_pos + count <= m_decoded_stream.Length))
break;
int evt = WaitHandle.WaitAny (m_wait_handles);
if (1 == evt)
{
m_decode_finished = true;
if (m_decode_error != null)
{
m_decoded_stream.Position = current_pos;
throw m_decode_error;
}
}
}
m_decoded_stream.Position = current_pos;
total_read += m_decoded_stream.Read (buf, idx, count);
}
return total_read;
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}
#region IDisposable Members
bool _mio_disposed = false;
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protected override void Dispose (bool disposing)
{
if (!_mio_disposed)
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{
if (disposing)
{
if (!m_decode_finished)
{
m_worker.CancelAsync();
m_decode_complete.WaitOne();
}
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if (m_decoded_stream != null)
m_decoded_stream.Dispose();
m_decode_complete.Dispose();
m_available_chunk.Dispose();
m_worker.Dispose();
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}
_mio_disposed = true;
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base.Dispose (disposing);
}
}
#endregion
}
}