From 2ce7c55bdfd9c70ad3134d7835872bd02b492cfc Mon Sep 17 00:00:00 2001 From: morkt Date: Fri, 1 May 2015 23:33:22 +0400 Subject: [PATCH] implemented MP3 audio wrapper. --- ArcFormats/ArcFormats.csproj | 5 + ArcFormats/AudioMP3.cs | 135 ++++++++++++++++++++++++++ ArcFormats/Properties/AssemblyInfo.cs | 4 +- 3 files changed, 142 insertions(+), 2 deletions(-) create mode 100644 ArcFormats/AudioMP3.cs diff --git a/ArcFormats/ArcFormats.csproj b/ArcFormats/ArcFormats.csproj index 02ba00d1..bdbd05c3 100644 --- a/ArcFormats/ArcFormats.csproj +++ b/ArcFormats/ArcFormats.csproj @@ -38,6 +38,10 @@ 6291456 + + False + ..\packages\NAudio.1.7.2\lib\net35\NAudio.dll + False ..\packages\NVorbis.0.8.4.0\lib\NVorbis.dll @@ -105,6 +109,7 @@ + diff --git a/ArcFormats/AudioMP3.cs b/ArcFormats/AudioMP3.cs new file mode 100644 index 00000000..e0f6491f --- /dev/null +++ b/ArcFormats/AudioMP3.cs @@ -0,0 +1,135 @@ +//! \file AudioMP3.cs +//! \date Fri May 01 22:04:37 2015 +//! \brief MP3 wrapper for GameRes. +// +// 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.ComponentModel.Composition; +using System.IO; +using NAudio; +using NAudio.Wave; + +namespace GameRes.Formats +{ + public class Mp3Input : SoundInput + { + int m_bitrate; + Stream m_source; + + public override long Position + { + get { return m_input.Position; } + set { m_input.Position = value; } + } + + public override bool CanSeek { get { return m_input.CanSeek; } } + + public override int SourceBitrate + { + get { return m_bitrate; } + } + + public Mp3Input (Stream file) : base (file) + { + var rdr = new Mp3FileReader (m_input); + var wav = WaveFormatConversionStream.CreatePcmStream (rdr); + var bar = new BlockAlignReductionStream (wav); + m_source = m_input; + m_input = bar; + + m_bitrate = rdr.Mp3WaveFormat.AverageBytesPerSecond*8; + var format = new GameRes.WaveFormat(); + format.FormatTag = (ushort)wav.WaveFormat.Encoding; + format.Channels = (ushort)wav.WaveFormat.Channels; + format.SamplesPerSecond = (uint)wav.WaveFormat.SampleRate; + format.BitsPerSample = (ushort)wav.WaveFormat.BitsPerSample; + format.BlockAlign = (ushort)bar.BlockAlign; + format.AverageBytesPerSecond = (uint)wav.WaveFormat.AverageBytesPerSecond; + this.Format = format; + this.PcmSize = m_input.Length; + } + + public override int Read(byte[] buffer, int offset, int count) + { + return m_input.Read (buffer, offset, count); + } + + #region IDisposable Members + protected override void Dispose (bool disposing) + { + if (null != m_source) + { + if (disposing) + { + m_source.Dispose(); + } + m_source = null; + base.Dispose (disposing); + } + } + #endregion + } + + [Export(typeof(AudioFormat))] + public class Mp3Audio : AudioFormat + { + public override string Tag { get { return "MP3"; } } + public override string Description { get { return "MPEG Layer 3 audio format"; } } + public override uint Signature { get { return 0; } } + + public override SoundInput TryOpen (Stream file) + { + byte[] header = new byte[10]; + if (header.Length != file.Read (header, 0, header.Length)) + return null; + long start_offset = SkipId3Tag (header); + if (0 != start_offset) + { + file.Position = start_offset; + if (4 != file.Read (header, 0, 4)) + return null; + } + if (0xff != header[0] || 0xf2 != (header[1] & 0xf6) || 0xf0 == (header[2] & 0xf0)) + return null; + file.Position = 0; + return new Mp3Input (file); + } + + long SkipId3Tag (byte[] buffer) + { + long start_offset = 0; + if (0x49 == buffer[0] && 0x44 == buffer[1] && 0x33 == buffer[2]) // 'ID3' + { + if (buffer[3] < 0x80 && buffer[4] < 0x80 && + buffer[6] < 0x80 && buffer[7] < 0x80 && buffer[8] < 0x80 && buffer[9] < 0x80) + { + int size = buffer[6] << 21 | buffer[7] << 14 | buffer[8] << 7 | buffer[9]; + if (buffer[3] > 3 && 0 != (buffer[5] & 0x10)) // v2.4 footer present + size += 10; + start_offset = 10 + size; + } + } + return start_offset; + } + } +} diff --git a/ArcFormats/Properties/AssemblyInfo.cs b/ArcFormats/Properties/AssemblyInfo.cs index fb3059cd..6659bd20 100644 --- a/ArcFormats/Properties/AssemblyInfo.cs +++ b/ArcFormats/Properties/AssemblyInfo.cs @@ -32,5 +32,5 @@ using System.Runtime.InteropServices; // You can specify all the values or you can default the Build and Revision Numbers // by using the '*' as shown below: // [assembly: AssemblyVersion("1.0.*")] -[assembly: AssemblyVersion ("1.0.4.46")] -[assembly: AssemblyFileVersion ("1.0.4.46")] +[assembly: AssemblyVersion ("1.0.4.47")] +[assembly: AssemblyFileVersion ("1.0.4.47")]