public static SynchsafeInt28 operator -(SynchsafeInt28 value, int value1)
{
SynchsafeInt28 _ReturnValue = new SynchsafeInt28();
_ReturnValue.VALUE = value.VALUE - (uint)value1;
return(_ReturnValue);
}
private void readID3(byte[] vs, ref int index)
{
//Read ID3 Header
if (ByteTools.BytesToString(vs, ref index, 3) != "ID3")
{
throw new FileLoadException("Invalid ID3");
}
byte[] ver = new byte[2];
Array.Copy(vs, index, ver, 0, 2);
ID3Ver = (float)ver[0] + ((float)ver[1] / 10.0f);
index += 2;
BitArray flags = ByteTools.BytesToBitArray(vs, ref index, 1);
SInt28 size = ByteTools.BytesToSInt28(vs, ref index, true);
//Set Important Flags
async = flags.Get(0);
if (ver[0] == 0x00)
{
}
else if (ver[0] == 0x00)
{
bool ext = flags.Get(1);
}
else if (ver[0] == 0x04)
{
bool ext = flags.Get(1);
bool foot = flags.Get(3);
bool upd = false;
bool crc = false;
SInt35 crcd = 0;
bool rst = false;
byte rstd = 0;
if (ext)
{
SInt28 esize = ByteTools.BytesToSInt28(vs, ref index, true);
BitArray extFlags = ByteTools.BytesToBitArray(vs, ref index, 1);
upd = extFlags.Get(1);
crc = extFlags.Get(2);
rst = extFlags.Get(3);
if (upd)
{
index++;
}
if (crc)
{
index++;
crcd = ByteTools.BytesToSInt35(vs, ref index, true);
}
if (rst)
{
index++;
rstd = vs[index];
index++;
/*
* rstd layout %ppqrrstt
* p - Tag size restrictions
* 00 No more than 128 frames and 1 MB total tag size.
* 01 No more than 64 frames and 128 KB total tag size.
* 10 No more than 32 frames and 40 KB total tag size.
* 11 No more than 32 frames and 4 KB total tag size.
* q - Text encoding restrictions
* 0 No restrictions
* 1 Strings are only encoded with ISO-8859-1 [ISO-8859-1] or UTF-8 [UTF-8].
* r - Text fields size restrictions
* 00 No restrictions
* 01 No string is longer than 1024 characters.
* 10 No string is longer than 128 characters.
* 11 No string is longer than 30 characters.
* s - Image encoding restrictions
* 0 No restrictions
* 1 Images are encoded only with PNG [PNG] or JPEG [JFIF].
* t - Image size restrictions
* 00 No restrictions
* 01 All images are 256x256 pixels or smaller.
* 10 All images are 64x64 pixels or smaller.
* 11 All images are exactly 64x64 pixels, unless required otherwise.
*/
}
}
}
else
{
throw new FileLoadException("ID3v2." + ID3Ver + " Not Supported");
}
if (ver[0] == 0x03 || ver[0] == 0x04)
{
frames = new ArrayList();
while (vs[index] != 0xFF && (vs[index + 1] & 0b1110) != 0)
{
//Read Frame Header
ID3Frames frame = new ID3Frames();
frame.ID = ByteTools.BytesToString(vs, ref index, 4);
frame.frameSize = ByteTools.BytesToSInt28(vs, ref index, true);
frame.frameFlags = ByteTools.BytesToBitArray(vs, ref index, 2);
//Read Frame Data
byte encoding = vs[index++];
frame.frameSize = frame.frameSize - 1;
switch (encoding)
{
case 0:
frame.disenc = "ISO-8859-1";
frame.txt = ByteTools.BytesToString(vs, ref index, (int)(uint)frame.frameSize, Encoding.GetEncoding("ISO-8859-1"));
break;
case 1:
frame.disenc = "UTF-16";
frame.txt = ByteTools.BytesToString(vs, ref index, (int)(uint)frame.frameSize, Encoding.Unicode);
break;
case 2:
frame.disenc = "UTF-16BE";
frame.txt = ByteTools.BytesToString(vs, ref index, (int)(uint)frame.frameSize, Encoding.BigEndianUnicode);
break;
case 3:
frame.disenc = "UTF-8";
frame.txt = ByteTools.BytesToString(vs, ref index, (int)(uint)frame.frameSize, Encoding.UTF8);
break;
}
//Add Data to Frame Collection
frames.Add(frame);
//Report Data Collected
Console.WriteLine("Frame ID: " + frame.ID);
Console.WriteLine("Frame Size: " + (uint)frame.frameSize);
Console.Write("Flags: ");
foreach (bool bit in frame.frameFlags)
{
Console.Write(bit ? "1" : "0");
}
Console.WriteLine("\nText Encoding Type: " + frame.disenc);
Console.WriteLine("Text Data: " + frame.txt + "\n");
}
}
}
