13608e1f94
git-svn-id: svn://localhost/Users/andi/Downloads/code/trunk@12 eddbe33b-e435-4246-ac25-f5eb65f9a13c
326 lines
9.4 KiB
C#
326 lines
9.4 KiB
C#
/* This file is part of CustomizeMii
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* Copyright (C) 2009 Leathl
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*
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* CustomizeMii is free software: you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as published
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* by the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* CustomizeMii is distributed in the hope that it will be
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* useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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using System;
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using System.IO;
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namespace WaveFile
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{
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/// <summary>
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/// A class for RIFF Wave files
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/// </summary>
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public class Wave
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{
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//Private Variables
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private int fmtOffset;
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private int dataOffset;
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private int smplOffset;
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private byte[] waveFile;
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//Public Variables
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/// <summary>
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/// The Samplerate of the Wave file
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/// </summary>
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public int SampleRate { get { return GetSampleRate(); } }
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/// <summary>
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/// The Bitdepth of the Wave file
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/// </summary>
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public int BitDepth { get { return GetBitDepth(); } }
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/// <summary>
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/// The number of channels of the Wave file
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/// </summary>
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public int ChannelCount { get { return GetChannelCount(); } }
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/// <summary>
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/// The format of the Wave file's data. 1 = PCM
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/// </summary>
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public int DataFormat { get { return GetDataFormat(); } }
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/// <summary>
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/// The number of Loops in the Wave file
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/// </summary>
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public int LoopCount { get { return GetLoopCount(); } }
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/// <summary>
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/// The start sample of the first Loop (if exist)
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/// </summary>
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public int LoopStart { get { return GetLoopStart(); } }
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//Public Functions
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public Wave(string waveFile)
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{
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using (FileStream fs = new FileStream(waveFile, FileMode.Open))
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{
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byte[] temp = new byte[fs.Length];
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fs.Read(temp, 0, temp.Length);
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this.waveFile = temp;
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}
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if (!CheckWave()) throw new Exception("This is not a supported PCM Wave File!");
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if (!GetFmtOffset()) throw new Exception("The format section couldn't be found!");
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if (!GetDataOffset()) throw new Exception("The data section couldn't be found!");
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GetSmplOffset();
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}
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public Wave(byte[] waveFile)
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{
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this.waveFile = waveFile;
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if (!CheckWave()) throw new Exception("This is not a supported PCM Wave File!");
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if (!GetFmtOffset()) throw new Exception("The format section couldn't be found!");
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if (!GetDataOffset()) throw new Exception("The data section couldn't be found!");
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GetSmplOffset();
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}
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/// <summary>
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/// Returns the Wave file as a Byte Array
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/// </summary>
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/// <returns></returns>
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public byte[] ToByteArray()
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{
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return waveFile;
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}
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/// <summary>
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/// Returns the Wave file as a Memory Stream
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/// </summary>
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/// <returns></returns>
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public MemoryStream ToMemoryStream()
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{
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return new MemoryStream(waveFile);
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}
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/// <summary>
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/// Returns only the audio data of the Wave file (No header or anything else)
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/// </summary>
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/// <returns></returns>
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public byte[] GetAllFrames()
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{
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int dataLength = GetDataLength();
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MemoryStream ms = new MemoryStream();
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ms.Write(waveFile, dataOffset, dataLength);
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return ms.ToArray();
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}
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/// <summary>
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/// Closes the Wave file
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/// </summary>
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public void Close()
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{
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waveFile = null;
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}
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//Private Functions
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private int GetLoopStart()
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{
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if (smplOffset == -1) return 0;
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byte[] temp = new byte[4];
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temp[0] = waveFile[smplOffset + 52];
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temp[1] = waveFile[smplOffset + 53];
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temp[2] = waveFile[smplOffset + 54];
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temp[3] = waveFile[smplOffset + 55];
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return BitConverter.ToInt32(temp, 0);
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}
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private int GetLoopCount()
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{
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if (smplOffset == -1) return 0;
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byte[] temp = new byte[4];
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temp[0] = waveFile[smplOffset + 36];
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temp[1] = waveFile[smplOffset + 37];
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temp[2] = waveFile[smplOffset + 38];
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temp[3] = waveFile[smplOffset + 39];
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return BitConverter.ToInt32(temp, 0);
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}
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private bool GetSmplOffset()
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{
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try
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{
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int length = (waveFile.Length > 5004 ? (waveFile.Length - 5000) : 0);
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for (int i = waveFile.Length - 4; i > length; i--)
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{
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if (waveFile[i] == 's' &&
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waveFile[i + 1] == 'm' &&
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waveFile[i + 2] == 'p' &&
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waveFile[i + 3] == 'l')
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{
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this.smplOffset = i;
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return true;
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}
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}
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}
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catch { }
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for (int i = 0; i < waveFile.Length - 4; i++)
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{
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if (waveFile[i] == 's' &&
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waveFile[i + 1] == 'm' &&
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waveFile[i + 2] == 'p' &&
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waveFile[i + 3] == 'l')
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{
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this.smplOffset = i;
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return true;
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}
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}
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this.smplOffset = -1;
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return false;
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}
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private bool GetFmtOffset()
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{
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if (waveFile[12] == 'f' &&
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waveFile[13] == 'm' &&
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waveFile[14] == 't' &&
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waveFile[15] == ' ')
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{
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this.fmtOffset = 12;
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return true;
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}
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int length = (waveFile.Length > 5004 ? 5000 : waveFile.Length - 4);
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for (int i = 0; i < length; i++)
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{
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if (waveFile[i] == 'f' &&
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waveFile[i + 1] == 'm' &&
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waveFile[i + 2] == 't' &&
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waveFile[i + 3] == ' ')
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{
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this.fmtOffset = i;
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return true;
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}
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}
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this.fmtOffset = -1;
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return false;
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}
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private int GetDataLength()
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{
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byte[] temp = new byte[4];
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temp[0] = waveFile[dataOffset + 4];
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temp[1] = waveFile[dataOffset + 5];
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temp[2] = waveFile[dataOffset + 6];
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temp[3] = waveFile[dataOffset + 7];
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return BitConverter.ToInt32(temp, 0);
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}
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private bool GetDataOffset()
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{
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if (waveFile[40] == 'd' &&
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waveFile[41] == 'a' &&
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waveFile[42] == 't' &&
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waveFile[43] == 'a')
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{
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this.dataOffset = 40;
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return true;
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}
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for (int i = 0; i < waveFile.Length - 4; i++)
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{
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if (waveFile[i] == 'd' &&
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waveFile[i + 1] == 'a' &&
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waveFile[i + 2] == 't' &&
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waveFile[i + 3] == 'a')
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{
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this.dataOffset = i;
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return true;
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}
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}
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this.dataOffset = -1;
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return false;
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}
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private int GetSampleRate()
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{
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byte[] temp = new byte[4];
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temp[0] = waveFile[fmtOffset + 12];
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temp[1] = waveFile[fmtOffset + 13];
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temp[2] = waveFile[fmtOffset + 14];
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temp[3] = waveFile[fmtOffset + 15];
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return BitConverter.ToInt32(temp, 0);
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}
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private int GetBitDepth()
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{
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byte[] temp = new byte[2];
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temp[0] = waveFile[fmtOffset + 22];
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temp[1] = waveFile[fmtOffset + 23];
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return BitConverter.ToInt16(temp, 0);
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}
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private int GetChannelCount()
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{
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byte[] temp = new byte[2];
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temp[0] = waveFile[fmtOffset + 10];
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temp[1] = waveFile[fmtOffset + 11];
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return BitConverter.ToInt16(temp, 0);
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}
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private int GetDataFormat()
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{
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byte[] temp = new byte[2];
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temp[0] = waveFile[fmtOffset + 8];
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temp[1] = waveFile[fmtOffset + 9];
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return BitConverter.ToInt16(temp, 0);
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}
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private bool CheckWave()
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{
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if (waveFile[0] != 'R' ||
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waveFile[1] != 'I' ||
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waveFile[2] != 'F' ||
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waveFile[3] != 'F' ||
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waveFile[8] != 'W' ||
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waveFile[9] != 'A' ||
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waveFile[10] != 'V' ||
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waveFile[11] != 'E') return false;
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return true;
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}
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}
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}
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