mirror of
https://github.com/Brawl345/customizemii.git
synced 2024-11-14 20:35:12 +01:00
246 lines
8.2 KiB
C#
246 lines
8.2 KiB
C#
|
/* This file is part of CustomizeMii
|
|||
|
|
* Copyright (C) 2009 Leathl
|
|||
|
|
*
|
|||
|
|
* CustomizeMii is free software: you can redistribute it and/or
|
|||
|
|
* modify it under the terms of the GNU General Public License as published
|
|||
|
|
* by the Free Software Foundation, either version 3 of the License, or
|
|||
|
|
* (at your option) any later version.
|
|||
|
|
*
|
|||
|
|
* CustomizeMii is distributed in the hope that it will be
|
|||
|
|
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty
|
|||
|
|
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|||
|
|
* GNU General Public License for more details.
|
|||
|
|
*
|
|||
|
|
* You should have received a copy of the GNU General Public License
|
|||
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|||
|
|
*/
|
|||
|
|
|
|||
|
|
using System;
|
|||
|
|
using System.Collections;
|
|||
|
|
using System.IO;
|
|||
|
|
|
|||
|
|
class MP3Info
|
|||
|
|
{
|
|||
|
|
//Private Variables
|
|||
|
|
private int fileSize;
|
|||
|
|
private int headerPos;
|
|||
|
|
private BitArray bitHeader;
|
|||
|
|
private MpegVersion mpegVersion;
|
|||
|
|
private MpegLayer mpegLayer;
|
|||
|
|
private int bitrate;
|
|||
|
|
private int frequency;
|
|||
|
|
private bool paddingBit;
|
|||
|
|
private int frameLength;
|
|||
|
|
private int frameCount;
|
|||
|
|
private double secLength;
|
|||
|
|
private int waveSamples;
|
|||
|
|
|
|||
|
|
//Public Variables
|
|||
|
|
public int FileSize { get { return fileSize; } }
|
|||
|
|
public MpegVersion MPEGVersion { get { return mpegVersion; } }
|
|||
|
|
public MpegLayer MPEGLayer { get { return mpegLayer; } }
|
|||
|
|
public int Bitrate { get { return bitrate; } }
|
|||
|
|
public int Frequency { get { return frequency; } }
|
|||
|
|
public int FrameLength { get { return frameLength; } }
|
|||
|
|
public int FrameCount { get { return frameCount; } }
|
|||
|
|
public double Seconds { get { return secLength; } }
|
|||
|
|
public int AudioSamples { get { return waveSamples; } }
|
|||
|
|
|
|||
|
|
//Public Functions
|
|||
|
|
public MP3Info(string mp3File)
|
|||
|
|
{
|
|||
|
|
FileInfo fi = new FileInfo(mp3File);
|
|||
|
|
this.fileSize = (int)fi.Length;
|
|||
|
|
|
|||
|
|
FileStream fs = fi.OpenRead();
|
|||
|
|
fs.Seek(0, SeekOrigin.Begin);
|
|||
|
|
|
|||
|
|
this.headerPos = SearchHeader(fs);
|
|||
|
|
|
|||
|
|
byte[] header = new byte[4];
|
|||
|
|
fs.Seek(this.headerPos, SeekOrigin.Begin);
|
|||
|
|
fs.Read(header, 0, header.Length);
|
|||
|
|
fs.Close();
|
|||
|
|
|
|||
|
|
GetHeaderBits(header);
|
|||
|
|
LoadHeader();
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
public MP3Info(byte[] mp3Header)
|
|||
|
|
{
|
|||
|
|
GetHeaderBits(mp3Header);
|
|||
|
|
LoadHeader();
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
//Private Functions
|
|||
|
|
private void ShowHeader()
|
|||
|
|
{
|
|||
|
|
//For debugging
|
|||
|
|
if (this.bitHeader != null)
|
|||
|
|
{
|
|||
|
|
string strBits = string.Empty;
|
|||
|
|
foreach (bool x in this.bitHeader)
|
|||
|
|
if (x) strBits += "1"; else strBits += "0";
|
|||
|
|
|
|||
|
|
for (int i = strBits.Length - 8; i >= 0; i -= 8)
|
|||
|
|
strBits = strBits.Insert(i, " ");
|
|||
|
|
|
|||
|
|
System.Windows.Forms.MessageBox.Show(strBits);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
private int SearchHeader(Stream fileStream)
|
|||
|
|
{
|
|||
|
|
int tmp;
|
|||
|
|
|
|||
|
|
while ((tmp = fileStream.ReadByte()) != -1)
|
|||
|
|
{
|
|||
|
|
if (tmp == 255)
|
|||
|
|
{
|
|||
|
|
tmp = fileStream.ReadByte();
|
|||
|
|
BitArray tmpBits = new BitArray(new int[] { tmp });
|
|||
|
|
if (tmpBits[7] && tmpBits[6] && tmpBits[5]) return (int)(fileStream.Position - 2);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
throw new Exception("Frame Header couldn't be found!");
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
private void GetHeaderBits(byte[] fourBytes)
|
|||
|
|
{
|
|||
|
|
BitArray tmp = new BitArray(fourBytes);
|
|||
|
|
this.bitHeader = new BitArray(4 * 8);
|
|||
|
|
int count = 0;
|
|||
|
|
|
|||
|
|
for (int i = 0; i < 32; i += 8)
|
|||
|
|
for (int j = 7; j >= 0; j--)
|
|||
|
|
this.bitHeader[count++] = tmp[i + j];
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
private void LoadHeader()
|
|||
|
|
{
|
|||
|
|
GetVersion(this.bitHeader[11], this.bitHeader[12]);
|
|||
|
|
if (this.mpegVersion == MpegVersion.Reserved) throw new NotSupportedException("Unsupported MPEG Version!");
|
|||
|
|
GetLayer(this.bitHeader[13], this.bitHeader[14]);
|
|||
|
|
if (this.mpegLayer == MpegLayer.Reserved) throw new NotSupportedException("Unsupported MPEG Layer!");
|
|||
|
|
GetBitrate(this.bitHeader[16], this.bitHeader[17], this.bitHeader[18], this.bitHeader[19]);
|
|||
|
|
if (this.bitrate == 0) throw new NotSupportedException("Unsupported Bitrate!");
|
|||
|
|
GetFrequency(this.bitHeader[20], this.bitHeader[21]);
|
|||
|
|
if (this.frequency == -1) throw new NotSupportedException("Unsupported Frequency");
|
|||
|
|
this.paddingBit = this.bitHeader[22];
|
|||
|
|
|
|||
|
|
GetFrameLength();
|
|||
|
|
GetFrameCount();
|
|||
|
|
GetSeconds();
|
|||
|
|
GetWaveSamples();
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
private void GetVersion(params bool[] twoBits)
|
|||
|
|
{
|
|||
|
|
if (twoBits[0] && twoBits[1]) this.mpegVersion = MpegVersion.MpegVersion1;
|
|||
|
|
else if (twoBits[0] && !twoBits[1]) this.mpegVersion = MpegVersion.MpegVersion2;
|
|||
|
|
else if (!twoBits[0] && twoBits[1]) this.mpegVersion = MpegVersion.Reserved;
|
|||
|
|
else if (!twoBits[0] && !twoBits[1]) this.mpegVersion = MpegVersion.MpegVersion25;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
private void GetLayer(params bool[] twoBits)
|
|||
|
|
{
|
|||
|
|
if (twoBits[0] && twoBits[1]) this.mpegLayer = MpegLayer.I;
|
|||
|
|
else if (twoBits[0] && !twoBits[1]) this.mpegLayer = MpegLayer.II;
|
|||
|
|
else if (!twoBits[0] && twoBits[1]) this.mpegLayer = MpegLayer.III;
|
|||
|
|
else if (!twoBits[0] && !twoBits[1]) this.mpegLayer = MpegLayer.Reserved;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
private void GetBitrate(params bool[] fourBits)
|
|||
|
|
{
|
|||
|
|
int[] bitrateTable = GetBitrateTable();
|
|||
|
|
|
|||
|
|
Array.Reverse(fourBits);
|
|||
|
|
BitArray bArray = new BitArray(fourBits);
|
|||
|
|
byte[] index = new byte[1];
|
|||
|
|
bArray.CopyTo(index, 0);
|
|||
|
|
|
|||
|
|
this.bitrate = bitrateTable[index[0]];
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
private int[] GetBitrateTable()
|
|||
|
|
{
|
|||
|
|
if (this.mpegVersion == MpegVersion.MpegVersion1)
|
|||
|
|
{
|
|||
|
|
if (this.mpegLayer == MpegLayer.I) return new int[] { 0, 32, 64, 96, 128, 160, 192, 224, 256, 288, 320, 352, 384, 416, 448, 0 };
|
|||
|
|
if (this.mpegLayer == MpegLayer.II) return new int[] { 0, 32, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 384, 0 };
|
|||
|
|
if (this.mpegLayer == MpegLayer.III) return new int[] { 0, 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 0 };
|
|||
|
|
}
|
|||
|
|
else
|
|||
|
|
{
|
|||
|
|
if (this.mpegLayer == MpegLayer.I) return new int[] { 0, 32, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192, 224, 256, 0 };
|
|||
|
|
if (this.mpegLayer == MpegLayer.II ||
|
|||
|
|
this.mpegLayer == MpegLayer.III) return new int[] { 0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160, 0 };
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
throw new NotSupportedException("Unsupported MPEG Version or Layer!");
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
private void GetFrequency(params bool[] twoBits)
|
|||
|
|
{
|
|||
|
|
int[] frequencyTable = GetFrequencyTable();
|
|||
|
|
|
|||
|
|
Array.Reverse(twoBits);
|
|||
|
|
BitArray bArray = new BitArray(twoBits);
|
|||
|
|
byte[] index = new byte[1];
|
|||
|
|
bArray.CopyTo(index, 0);
|
|||
|
|
|
|||
|
|
this.frequency = frequencyTable[index[0]];
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
private int[] GetFrequencyTable()
|
|||
|
|
{
|
|||
|
|
if (this.mpegVersion == MpegVersion.MpegVersion1)
|
|||
|
|
return new int[] { 44100, 48000, 32000, -1 };
|
|||
|
|
else if (this.mpegVersion == MpegVersion.MpegVersion2)
|
|||
|
|
return new int[] { 22050, 24000, 16000, -1 };
|
|||
|
|
else if (this.mpegVersion == MpegVersion.MpegVersion25)
|
|||
|
|
return new int[] { 32000, 16000, 8000, -1 };
|
|||
|
|
else
|
|||
|
|
return new int[] { 0, 0, 0, -1 };
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
private void GetFrameLength()
|
|||
|
|
{
|
|||
|
|
double frmSize = (double)((this.mpegLayer == MpegLayer.I ? 12 : 144) * ((1000.0 * (float)this.bitrate / (float)this.frequency)));
|
|||
|
|
this.frameLength = (int)Math.Ceiling(frmSize);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
private void GetFrameCount()
|
|||
|
|
{
|
|||
|
|
this.frameCount = (this.fileSize - this.headerPos) / this.frameLength;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
private void GetSeconds()
|
|||
|
|
{
|
|||
|
|
this.secLength = ((this.fileSize - this.headerPos) * 8.00) / (1000.00 * this.bitrate);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
private void GetWaveSamples()
|
|||
|
|
{
|
|||
|
|
this.waveSamples = this.frameCount * 1125;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
//Structs & Enums
|
|||
|
|
public enum MpegVersion : int
|
|||
|
|
{
|
|||
|
|
Reserved = 0,
|
|||
|
|
MpegVersion1 = 1,
|
|||
|
|
MpegVersion25 = 2,
|
|||
|
|
MpegVersion2 = 3
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
public enum MpegLayer : int
|
|||
|
|
{
|
|||
|
|
Reserved = 0,
|
|||
|
|
I = 1,
|
|||
|
|
II = 2,
|
|||
|
|
III = 3
|
|||
|
|
}
|
|||
|
|
}
|