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365 lines
14 KiB
C#
365 lines
14 KiB
C#
//! \file AudioMIO.cs
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//! \date Thu May 28 13:33:07 2015
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//! \brief Entis audio format implementation.
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//
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// Copyright (C) 2015 by morkt
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to
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// deal in the Software without restriction, including without limitation the
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// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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// sell copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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// IN THE SOFTWARE.
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//
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using System;
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using System.Collections.Concurrent;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.ComponentModel.Composition;
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using System.Diagnostics;
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using System.IO;
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using System.Threading;
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using GameRes.Utility;
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namespace GameRes.Formats.Entis
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{
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[Export(typeof(AudioFormat))]
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public class MioAudio : AudioFormat
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{
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public override string Tag { get { return "MIO"; } }
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public override string Description { get { return "Entis engine compressed audio format"; } }
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public override uint Signature { get { return 0x69746e45u; } } // 'Enti'
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public override SoundInput TryOpen (Stream file)
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{
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byte[] header = new byte[0x40];
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if (header.Length != file.Read (header, 0, header.Length))
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return null;
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if (0x03000100 != LittleEndian.ToUInt32 (header, 8))
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return null;
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if (!Binary.AsciiEqual (header, 0x10, "Music Interleaved"))
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return null;
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return new MioInput (file);
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}
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}
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public class MioInput : SoundInput
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{
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MioInfoHeader m_info;
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long m_stream_pos;
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int m_bitrate;
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uint m_total_samples;
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ERISADecodeContext m_pmioc;
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MioDecoder m_pmiod;
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Stream m_decoded_stream;
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public int ChannelCount { get { return m_info.ChannelCount; } }
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public uint BitsPerSample { get { return m_info.BitsPerSample; } }
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public override int SourceBitrate { get { return m_bitrate; } }
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public override string SourceFormat { get { return "mio"; } }
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#region Stream Members
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public override bool CanSeek { get { return m_decoded_stream.CanSeek; } }
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public override long Position
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{
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get { return m_decoded_stream.Position; }
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set { m_decoded_stream.Position = value; }
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}
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public override int Read (byte[] buffer, int offset, int count)
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{
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return Read_Threaded (buffer, offset, count);
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}
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#endregion
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public MioInput (Stream file) : base (file)
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{
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file.Position = 0x40;
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using (var erif = new EriFile (file))
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{
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var section = erif.ReadSection();
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if (section.Id != "Header " || section.Length <= 0 || section.Length > int.MaxValue)
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throw new InvalidFormatException();
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m_stream_pos = 0x50 + section.Length;
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int header_size = (int)section.Length;
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while (header_size > 0x10)
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{
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section = erif.ReadSection();
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header_size -= 0x10;
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if (section.Length <= 0 || section.Length > header_size)
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break;
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if ("SoundInf" == section.Id)
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{
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m_info = new MioInfoHeader();
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m_info.Version = erif.ReadInt32();
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m_info.Transformation = (CvType)erif.ReadInt32();
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m_info.Architecture = (EriCode)erif.ReadInt32();
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m_info.ChannelCount = erif.ReadInt32();
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m_info.SamplesPerSec = erif.ReadUInt32();
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m_info.BlocksetCount = erif.ReadUInt32();
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m_info.SubbandDegree = erif.ReadInt32();
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m_info.AllSampleCount = erif.ReadUInt32();
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m_info.LappedDegree = erif.ReadUInt32();
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m_info.BitsPerSample = erif.ReadUInt32();
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break;
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}
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header_size -= (int)section.Length;
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erif.BaseStream.Seek (section.Length, SeekOrigin.Current);
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}
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if (null == m_info)
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throw new InvalidFormatException ("MIO sound header not found");
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erif.BaseStream.Position = m_stream_pos;
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var stream_size = erif.FindSection ("Stream ");
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m_stream_pos = erif.BaseStream.Position;
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m_pmiod = new MioDecoder (m_info);
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if (EriCode.Nemesis != m_info.Architecture)
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m_pmioc = new HuffmanDecodeContext (0x10000);
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else
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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();
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format.FormatTag = 1;
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format.Channels = (ushort)ChannelCount;
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format.SamplesPerSecond = m_info.SamplesPerSec;
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format.BitsPerSample = (ushort)BitsPerSample;
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format.BlockAlign = (ushort)(BitsPerSample/8*format.Channels);
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format.AverageBytesPerSecond = (uint)pcm_bitrate/8;
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this.Format = format;
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m_decoded_stream = LoadChunks (erif);
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if (0 != m_total_samples)
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m_bitrate = (int)(stream_size * 8 * m_info.SamplesPerSec / m_total_samples);
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this.PcmSize = m_total_samples * ChannelCount * BitsPerSample / 8;
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m_decoded_stream.Position = 0;
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}
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}
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class MioChunk : MioDataHeader
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{
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public uint FirstSample;
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public long Position;
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public uint Size;
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}
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class ChunkStream : InputProxyStream
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{
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MioChunk m_chunk;
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public ChunkStream (Stream source, MioChunk chunk) : base (source, true)
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{
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m_chunk = chunk;
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BaseStream.Position = m_chunk.Position;
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}
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public override bool CanRead { get { return true; } }
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public override long Length { get { return m_chunk.Size; } }
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public override long Position
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{
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get { return BaseStream.Position-m_chunk.Position; }
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set { Seek (value, SeekOrigin.Begin); }
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}
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public override long Seek (long offset, SeekOrigin origin)
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{
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if (origin == SeekOrigin.Begin)
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offset += m_chunk.Position;
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else if (origin == SeekOrigin.Current)
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offset += BaseStream.Position;
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else
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offset += m_chunk.Position + m_chunk.Size;
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if (offset < m_chunk.Position)
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offset = m_chunk.Position;
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BaseStream.Position = offset;
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return offset - m_chunk.Position;
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}
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public override int Read (byte[] buf, int index, int count)
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{
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long remaining = (m_chunk.Position + m_chunk.Size) - BaseStream.Position;
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if (count > remaining)
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count = (int)remaining;
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if (count <= 0)
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return 0;
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return BaseStream.Read (buf, index, count);
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}
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}
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private Stream LoadChunks (EriFile erif)
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{
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uint current_sample = 0;
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List<MioChunk> chunks = new List<MioChunk>();
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try
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{
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erif.BaseStream.Position = m_stream_pos;
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for (;;)
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{
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long chunk_length = erif.FindSection ("SoundStm");
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if (chunk_length > int.MaxValue)
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throw new FileSizeException();
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var chunk = new MioChunk();
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chunk.FirstSample = current_sample;
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chunk.Version = erif.ReadByte();
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chunk.Flags = erif.ReadByte();
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erif.ReadInt16();
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chunk.SampleCount = erif.ReadUInt32();
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chunk.Position = erif.BaseStream.Position;
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chunk.Size = (uint)(chunk_length - 8);
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current_sample += chunk.SampleCount;
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chunks.Add (chunk);
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erif.BaseStream.Seek (chunk.Size, SeekOrigin.Current);
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}
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}
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catch (EndOfStreamException) { /* ignore EOF errors */ }
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m_total_samples = current_sample;
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if (0 == m_total_samples)
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{
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m_decode_finished = true;
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return Stream.Null;
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}
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uint sample_bytes = (uint)ChannelCount * BitsPerSample / 8;
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var total_bytes = m_total_samples * sample_bytes;
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m_wait_handles = new WaitHandle[2] { m_available_chunk, m_decode_complete };
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m_chunk_queue = new ConcurrentQueue<byte[]>();
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m_worker = new BackgroundWorker();
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m_worker.WorkerSupportsCancellation = true;
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m_worker.DoWork += DoWork_Decode;
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m_worker.RunWorkerAsync (chunks);
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return new MemoryStream ((int)total_bytes);
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}
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bool m_decode_finished = false;
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AutoResetEvent m_decode_complete = new AutoResetEvent (false);
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AutoResetEvent m_available_chunk = new AutoResetEvent (false);
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WaitHandle[] m_wait_handles;
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ConcurrentQueue<byte[]> m_chunk_queue;
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BackgroundWorker m_worker;
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Exception m_decode_error = null;
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private void DoWork_Decode (object sender, DoWorkEventArgs e)
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{
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try
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{
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var worker = sender as BackgroundWorker;
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var chunks = e.Argument as IEnumerable<MioChunk>;
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uint sample_bytes = (uint)ChannelCount * BitsPerSample / 8;
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foreach (var chunk in chunks)
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{
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if (worker.CancellationPending)
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{
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e.Cancel = true;
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break;
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}
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using (var input = new ChunkStream (Source, chunk))
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{
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var wave_buf = new byte[chunk.SampleCount * sample_bytes];
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m_pmioc.AttachInputFile (input);
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if (!m_pmiod.DecodeSound (m_pmioc, chunk, wave_buf, 0))
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throw new InvalidFormatException();
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m_chunk_queue.Enqueue (wave_buf);
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m_available_chunk.Set();
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}
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}
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}
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catch (Exception X)
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{
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Trace.WriteLine (X.Message, "[MIO]");
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m_decode_error = X;
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}
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finally
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{
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m_decode_complete.Set();
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}
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}
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private int Read_Threaded (byte[] buf, int idx, int count)
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{
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var current_pos = Position;
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int total_read = 0;
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if (current_pos < m_decoded_stream.Length)
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{
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int available_bytes = (int)(m_decoded_stream.Length - current_pos);
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int read = m_decoded_stream.Read (buf, idx, Math.Min (count, available_bytes));
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idx += read;
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count -= read;
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total_read += read;
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}
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if (count > 0 && (!m_decode_finished || m_chunk_queue.Count > 0))
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{
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current_pos = Position;
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m_decoded_stream.Seek (0, SeekOrigin.End);
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for (;;)
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{
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byte[] wave_buf = null;
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while (m_chunk_queue.TryDequeue (out wave_buf))
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{
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m_decoded_stream.Write (wave_buf, 0, wave_buf.Length);
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if (current_pos + count <= m_decoded_stream.Length)
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break;
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}
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if (m_decode_finished || (current_pos + count <= m_decoded_stream.Length))
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break;
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int evt = WaitHandle.WaitAny (m_wait_handles);
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if (1 == evt)
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{
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m_decode_finished = true;
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if (m_decode_error != null)
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{
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m_decoded_stream.Position = current_pos;
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throw m_decode_error;
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}
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}
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}
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m_decoded_stream.Position = current_pos;
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total_read += m_decoded_stream.Read (buf, idx, count);
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}
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return total_read;
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}
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#region IDisposable Members
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bool _mio_disposed = false;
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protected override void Dispose (bool disposing)
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{
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if (!_mio_disposed)
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{
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if (disposing)
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{
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if (!m_decode_finished)
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{
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m_worker.CancelAsync();
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m_decode_complete.WaitOne();
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}
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if (m_decoded_stream != null)
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m_decoded_stream.Dispose();
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m_decode_complete.Dispose();
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m_available_chunk.Dispose();
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m_worker.Dispose();
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}
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_mio_disposed = true;
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base.Dispose (disposing);
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}
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}
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#endregion
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}
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}
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