protected unsafe virtual bool ParseHeader(ref byte* headerBuffer, FlacMetadataStreamInfo streamInfo)
{
const string loggerLocation = "FlacFrameHeader.ParseHeader(byte*, FlacMetadataStreamInfo)";
int x = -1; //tmp value to store in
if (headerBuffer[0] == 0xFF && headerBuffer[1] >> 1 == 0x7C) //sync bits
{
if ((headerBuffer[1] & 0x02) != 0) // ...10 2. letzes bits muss 0 sein
{
Error("Invalid FlacFrame. Reservedbit_0 is 1", loggerLocation);
return false;
}
byte* __headerbufferPtr = headerBuffer;
FlacBitReader reader = new FlacBitReader(__headerbufferPtr, 0);
#region blocksize
//blocksize
x = headerBuffer[2] >> 4;
int blocksize = -1;
if (x == 0)
{
Error("Invalid Blocksize value: 0", loggerLocation);
return false;
}
else if (x == 1)
blocksize = 192;
else if (x >= 2 && x <= 5)
blocksize = 576 << (x - 2);
else if (x == 6 || x == 7)
blocksize_hint = x;
else if (x >= 8 && x <= 15)
blocksize = 256 << (x - 8);
else
{
Error("Invalid Blocksize value: " + x, loggerLocation);
return false;
}
BlockSize = blocksize;
#endregion blocksize
#region samplerate
//samplerate
x = headerBuffer[2] & 0x0F;
int sampleRate = -1;
if (x == 0)
{
if (streamInfo != null)
sampleRate = streamInfo.SampleRate;
else
{
Error("Missing Samplerate. Samplerate Index = 0 && streamInfoMetaData == null.", loggerLocation);
return false;
}
}
else if (x >= 1 && x <= 11)
sampleRate = FlacConstant.SampleRateTable[x];
else if (x >= 12 && x <= 14)
sampleRate_hint = x;
else
{
Error("Invalid SampleRate value: " + x, loggerLocation);
return false;
}
SampleRate = sampleRate;
#endregion samplerate
#region channels
x = headerBuffer[3] >> 4; //cc: unsigned
int channels = -1;
if ((x & 8) != 0)
{
channels = 2;
if ((x & 7) > 2 || (x & 7) < 0)
{
Error("Invalid ChannelAssignment", loggerLocation);
return false;
}
else
ChannelAssignment = (ChannelAssignment)((x & 7) + 1);
}
else
{
channels = x + 1;
ChannelAssignment = ChannelAssignment.Independent;
}
Channels = channels;
#endregion channels
#region bitspersample
x = (headerBuffer[3] & 0x0E) >> 1;
int bitsPerSample = -1;
if (x == 0)
{
if (streamInfo != null)
bitsPerSample = streamInfo.BitsPerSample;
else
{
Error("Missing BitsPerSample. Index = 0 && streamInfoMetaData == null.", loggerLocation);
return false;
}
}
else if (x == 3 || x >= 7 || x < 0)
{
Error("Invalid BitsPerSampleIndex", loggerLocation);
return false;
}
else
bitsPerSample = FlacConstant.BitPerSampleTable[x];
BitsPerSample = bitsPerSample;
#endregion bitspersample
if ((headerBuffer[3] & 0x01) != 0) // reserved bit -> 0
{
Error("Invalid FlacFrame. Reservedbit_1 is 1", loggerLocation);
return false;
}
//reader.SkipBits(4 * 8); //erste 3 bytes headerbytes überspringen, da diese schon ohne reader verarbeitet
reader.ReadBits(32);
//BYTE 4
#region utf8
//variable blocksize
if ((headerBuffer[1] & 0x01) != 0 ||
(streamInfo != null && streamInfo.MinBlockSize != streamInfo.MaxBlockSize))
{
ulong samplenumber;
if (reader.ReadUTF8_64(out samplenumber) && samplenumber != ulong.MaxValue)
{
NumberType = FlacNumberType.SampleNumber;
SampleNumber = samplenumber;
}
else
{
Error("Invalid UTF8 Samplenumber coding.", loggerLocation);
return false;
}
}
else //fixed blocksize
{
uint framenumber;// = reader.ReadUTF8();
if (reader.ReadUTF8_32(out framenumber) && framenumber != uint.MaxValue)
{
NumberType = FlacNumberType.FrameNumber;
FrameNumber = framenumber;
}
else
{
Error("Invalid UTF8 Framenumber coding.", loggerLocation);
return false;
}
}
#endregion utf8
#region read hints
//blocksize am ende des frameheaders
if (blocksize_hint != 0)
{
x = (int)reader.ReadBits(8);
if (blocksize_hint == 7)
{
x = (x << 8) | (int)reader.ReadBits(8);
}
BlockSize = x + 1;
}
//samplerate am ende des frameheaders
if (sampleRate_hint != 0)
{
x = (int)reader.ReadBits(8);
if (sampleRate_hint != 12)
{
x = (x << 8) | (int)reader.ReadBits(8);
}
if (sampleRate_hint == 12)
SampleRate = x * 1000;
else if (sampleRate_hint == 13)
SampleRate = x;
else
SampleRate = x * 10;
}
#endregion read hints
//if (Channels == 1 && BitsPerSample == 24 && SampleRate == 44100)
// System.Diagnostics.Debugger.Break();
if (DoCRC)
{
var crc8 = CSMath.CRC8.Instance.CalcCheckSum(reader.Buffer, 0, reader.Position);
CRC8 = (byte)reader.ReadBits(8);
if (CRC8 != crc8)
{
Error("CRC8 missmatch", loggerLocation);
return false;
}
}
headerBuffer += reader.Position;
return true;
}
Error("Invalid Syncbits", loggerLocation);
return false;
}
private unsafe bool ParseHeader(ref byte *headerBuffer, FlacMetadataStreamInfo streamInfo)
{
const string loggerLocation = "FlacFrameHeader.ParseHeader(byte*, FlacMetadataStreamInfo)";
int val;
if (headerBuffer[0] == 0xFF && headerBuffer[1] >> 1 == 0x7C) //sync bits
{
if ((headerBuffer[1] & 0x02) != 0)
{
Error("Invalid FlacFrame. Reservedbit_0 is 1", loggerLocation);
return(false);
}
byte * __headerbufferPtr = headerBuffer;
FlacBitReader reader = new FlacBitReader(__headerbufferPtr, 0);
#region blocksize
//blocksize
val = headerBuffer[2] >> 4;
int blocksize = -1;
if (val == 0)
{
Error("Invalid Blocksize value: 0", loggerLocation);
return(false);
}
if (val == 1)
{
blocksize = 192;
}
else if (val >= 2 && val <= 5)
{
blocksize = 576 << (val - 2);
}
else if (val == 6 || val == 7)
{
_blocksizeHint = val;
}
else if (val >= 8 && val <= 15)
{
blocksize = 256 << (val - 8);
}
else
{
Error("Invalid Blocksize value: " + val, loggerLocation);
return(false);
}
BlockSize = blocksize;
#endregion blocksize
#region samplerate
//samplerate
val = headerBuffer[2] & 0x0F;
int sampleRate = -1;
if (val == 0)
{
if (streamInfo != null)
{
sampleRate = streamInfo.SampleRate;
}
else
{
Error("Missing Samplerate. Samplerate Index = 0 && streamInfoMetaData == null.", loggerLocation);
return(false);
}
}
else if (val >= 1 && val <= 11)
{
sampleRate = FlacConstant.SampleRateTable[val];
}
else if (val >= 12 && val <= 14)
{
_sampleRateHint = val;
}
else
{
Error("Invalid SampleRate value: " + val, loggerLocation);
return(false);
}
SampleRate = sampleRate;
#endregion samplerate
#region channels
val = headerBuffer[3] >> 4; //cc: unsigned
int channels;
if ((val & 8) != 0)
{
channels = 2;
if ((val & 7) > 2 || (val & 7) < 0)
{
Error("Invalid ChannelAssignment", loggerLocation);
return(false);
}
ChannelAssignment = (ChannelAssignment)((val & 7) + 1);
}
else
{
channels = val + 1;
ChannelAssignment = ChannelAssignment.Independent;
}
Channels = channels;
#endregion channels
#region bitspersample
val = (headerBuffer[3] & 0x0E) >> 1;
int bitsPerSample;
if (val == 0)
{
if (streamInfo != null)
{
bitsPerSample = streamInfo.BitsPerSample;
}
else
{
Error("Missing BitsPerSample. Index = 0 && streamInfoMetaData == null.", loggerLocation);
return(false);
}
}
else if (val == 3 || val >= 7 || val < 0)
{
Error("Invalid BitsPerSampleIndex", loggerLocation);
return(false);
}
else
{
bitsPerSample = FlacConstant.BitPerSampleTable[val];
}
BitsPerSample = bitsPerSample;
#endregion bitspersample
if ((headerBuffer[3] & 0x01) != 0) // reserved bit -> 0
{
Error("Invalid FlacFrame. Reservedbit_1 is 1", loggerLocation);
return(false);
}
reader.ReadBits(32); //skip the first 4 bytes since they got already processed
//BYTE 4
#region utf8
//variable blocksize
if ((headerBuffer[1] & 0x01) != 0 ||
(streamInfo != null && streamInfo.MinBlockSize != streamInfo.MaxBlockSize))
{
ulong samplenumber;
if (reader.ReadUTF8_64(out samplenumber) && samplenumber != ulong.MaxValue)
{
BlockingStrategy = BlockingStrategy.VariableBlockSize;
SampleNumber = (long)samplenumber;
}
else
{
Error("Invalid UTF8 Samplenumber coding.", loggerLocation);
return(false);
}
}
else //fixed blocksize
{
uint framenumber;
if (reader.ReadUTF8_32(out framenumber) && framenumber != uint.MaxValue)
{
BlockingStrategy = BlockingStrategy.FixedBlockSize;
FrameNumber = (int)framenumber;
}
else
{
Error("Invalid UTF8 Framenumber coding.", loggerLocation);
return(false);
}
}
#endregion utf8
#region read hints
//blocksize am ende des frameheaders
if (_blocksizeHint != 0)
{
val = (int)reader.ReadBits(8);
if (_blocksizeHint == 7)
{
val = (val << 8) | (int)reader.ReadBits(8);
}
BlockSize = val + 1;
}
//samplerate
if (_sampleRateHint != 0)
{
val = (int)reader.ReadBits(8);
if (_sampleRateHint != 12)
{
val = (val << 8) | (int)reader.ReadBits(8);
}
if (_sampleRateHint == 12)
{
SampleRate = val * 1000;
}
else if (_sampleRateHint == 13)
{
SampleRate = val;
}
else
{
SampleRate = val * 10;
}
}
#endregion read hints
if (DoCrc)
{
var crc8 = Utils.CRC8.Instance.CalcCheckSum(reader.Buffer, 0, reader.Position);
Crc8 = (byte)reader.ReadBits(8);
if (Crc8 != crc8)
{
Error("CRC8 missmatch", loggerLocation);
return(false);
}
}
else
{
Crc8 = (byte)reader.ReadBits(8);
}
headerBuffer += reader.Position;
return(true);
}
Error("Invalid Syncbits", loggerLocation);
return(false);
}
private unsafe bool ParseHeader(ref byte* headerBuffer, FlacMetadataStreamInfo streamInfo)
{
const string loggerLocation = "FlacFrameHeader.ParseHeader(byte*, FlacMetadataStreamInfo)";
int val;
if (headerBuffer[0] == 0xFF && headerBuffer[1] >> 1 == 0x7C) //sync bits
{
if ((headerBuffer[1] & 0x02) != 0)
{
Error("Invalid FlacFrame. Reservedbit_0 is 1", loggerLocation);
return false;
}
byte* __headerbufferPtr = headerBuffer;
FlacBitReader reader = new FlacBitReader(__headerbufferPtr, 0);
#region blocksize
//blocksize
val = headerBuffer[2] >> 4;
int blocksize = -1;
if (val == 0)
{
Error("Invalid Blocksize value: 0", loggerLocation);
return false;
}
if (val == 1)
blocksize = 192;
else if (val >= 2 && val <= 5)
blocksize = 576 << (val - 2);
else if (val == 6 || val == 7)
_blocksizeHint = val;
else if (val >= 8 && val <= 15)
blocksize = 256 << (val - 8);
else
{
Error("Invalid Blocksize value: " + val, loggerLocation);
return false;
}
BlockSize = blocksize;
#endregion blocksize
#region samplerate
//samplerate
val = headerBuffer[2] & 0x0F;
int sampleRate = -1;
if (val == 0)
{
if (streamInfo != null)
sampleRate = streamInfo.SampleRate;
else
{
Error("Missing Samplerate. Samplerate Index = 0 && streamInfoMetaData == null.", loggerLocation);
return false;
}
}
else if (val >= 1 && val <= 11)
sampleRate = FlacConstant.SampleRateTable[val];
else if (val >= 12 && val <= 14)
_sampleRateHint = val;
else
{
Error("Invalid SampleRate value: " + val, loggerLocation);
return false;
}
SampleRate = sampleRate;
#endregion samplerate
#region channels
val = headerBuffer[3] >> 4; //cc: unsigned
int channels;
if ((val & 8) != 0)
{
channels = 2;
if ((val & 7) > 2 || (val & 7) < 0)
{
Error("Invalid ChannelAssignment", loggerLocation);
return false;
}
ChannelAssignment = (ChannelAssignment)((val & 7) + 1);
}
else
{
channels = val + 1;
ChannelAssignment = ChannelAssignment.Independent;
}
Channels = channels;
#endregion channels
#region bitspersample
val = (headerBuffer[3] & 0x0E) >> 1;
int bitsPerSample;
if (val == 0)
{
if (streamInfo != null)
bitsPerSample = streamInfo.BitsPerSample;
else
{
Error("Missing BitsPerSample. Index = 0 && streamInfoMetaData == null.", loggerLocation);
return false;
}
}
else if (val == 3 || val >= 7 || val < 0)
{
Error("Invalid BitsPerSampleIndex", loggerLocation);
return false;
}
else
bitsPerSample = FlacConstant.BitPerSampleTable[val];
BitsPerSample = bitsPerSample;
#endregion bitspersample
if ((headerBuffer[3] & 0x01) != 0) // reserved bit -> 0
{
Error("Invalid FlacFrame. Reservedbit_1 is 1", loggerLocation);
return false;
}
reader.ReadBits(32); //skip the first 4 bytes since they got already processed
//BYTE 4
#region utf8
//variable blocksize
if ((headerBuffer[1] & 0x01) != 0 ||
(streamInfo != null && streamInfo.MinBlockSize != streamInfo.MaxBlockSize))
{
ulong samplenumber;
if (reader.ReadUTF8_64(out samplenumber) && samplenumber != ulong.MaxValue)
{
BlockingStrategy = BlockingStrategy.VariableBlockSize;
SampleNumber = (long) samplenumber;
}
else
{
Error("Invalid UTF8 Samplenumber coding.", loggerLocation);
return false;
}
}
else //fixed blocksize
{
uint framenumber;
if (reader.ReadUTF8_32(out framenumber) && framenumber != uint.MaxValue)
{
BlockingStrategy = BlockingStrategy.FixedBlockSize;
FrameNumber = (int) framenumber;
}
else
{
Error("Invalid UTF8 Framenumber coding.", loggerLocation);
return false;
}
}
#endregion utf8
#region read hints
//blocksize am ende des frameheaders
if (_blocksizeHint != 0)
{
val = (int)reader.ReadBits(8);
if (_blocksizeHint == 7)
{
val = (val << 8) | (int)reader.ReadBits(8);
}
BlockSize = val + 1;
}
//samplerate
if (_sampleRateHint != 0)
{
val = (int)reader.ReadBits(8);
if (_sampleRateHint != 12)
{
val = (val << 8) | (int)reader.ReadBits(8);
}
if (_sampleRateHint == 12)
SampleRate = val * 1000;
else if (_sampleRateHint == 13)
SampleRate = val;
else
SampleRate = val * 10;
}
#endregion read hints
if (DoCrc)
{
var crc8 = Utils.CRC8.Instance.CalcCheckSum(reader.Buffer, 0, reader.Position);
Crc8 = (byte) reader.ReadBits(8);
if (Crc8 != crc8)
{
Error("CRC8 missmatch", loggerLocation);
return false;
}
}
else
{
Crc8 = (byte) reader.ReadBits(8);
}
headerBuffer += reader.Position;
return true;
}
Error("Invalid Syncbits", loggerLocation);
return false;
}
protected unsafe virtual bool ParseHeader(ref byte *headerBuffer, FlacMetadataStreamInfo streamInfo)
{
const string loggerLocation = "FlacFrameHeader.ParseHeader(byte*, FlacMetadataStreamInfo)";
int x = -1; //tmp value to store in
if (headerBuffer[0] == 0xFF && headerBuffer[1] >> 1 == 0x7C) //sync bits
{
if ((headerBuffer[1] & 0x02) != 0) // ...10 2. letzes bits muss 0 sein
{
Error("Invalid FlacFrame. Reservedbit_0 is 1", loggerLocation);
return(false);
}
byte * __headerbufferPtr = headerBuffer;
FlacBitReader reader = new FlacBitReader(__headerbufferPtr, 0);
#region blocksize
//blocksize
x = headerBuffer[2] >> 4;
int blocksize = -1;
if (x == 0)
{
Error("Invalid Blocksize value: 0", loggerLocation);
return(false);
}
else if (x == 1)
{
blocksize = 192;
}
else if (x >= 2 && x <= 5)
{
blocksize = 576 << (x - 2);
}
else if (x == 6 || x == 7)
{
blocksize_hint = x;
}
else if (x >= 8 && x <= 15)
{
blocksize = 256 << (x - 8);
}
else
{
Error("Invalid Blocksize value: " + x, loggerLocation);
return(false);
}
BlockSize = blocksize;
#endregion blocksize
#region samplerate
//samplerate
x = headerBuffer[2] & 0x0F;
int sampleRate = -1;
if (x == 0)
{
if (streamInfo != null)
{
sampleRate = streamInfo.SampleRate;
}
else
{
Error("Missing Samplerate. Samplerate Index = 0 && streamInfoMetaData == null.", loggerLocation);
return(false);
}
}
else if (x >= 1 && x <= 11)
{
sampleRate = FlacConstant.SampleRateTable[x];
}
else if (x >= 12 && x <= 14)
{
sampleRate_hint = x;
}
else
{
Error("Invalid SampleRate value: " + x, loggerLocation);
return(false);
}
SampleRate = sampleRate;
#endregion samplerate
#region channels
x = headerBuffer[3] >> 4; //cc: unsigned
int channels = -1;
if ((x & 8) != 0)
{
channels = 2;
if ((x & 7) > 2 || (x & 7) < 0)
{
Error("Invalid ChannelAssignment", loggerLocation);
return(false);
}
else
{
ChannelAssignment = (ChannelAssignment)((x & 7) + 1);
}
}
else
{
channels = x + 1;
ChannelAssignment = ChannelAssignment.Independent;
}
Channels = channels;
#endregion channels
#region bitspersample
x = (headerBuffer[3] & 0x0E) >> 1;
int bitsPerSample = -1;
if (x == 0)
{
if (streamInfo != null)
{
bitsPerSample = streamInfo.BitsPerSample;
}
else
{
Error("Missing BitsPerSample. Index = 0 && streamInfoMetaData == null.", loggerLocation);
return(false);
}
}
else if (x == 3 || x >= 7 || x < 0)
{
Error("Invalid BitsPerSampleIndex", loggerLocation);
return(false);
}
else
{
bitsPerSample = FlacConstant.BitPerSampleTable[x];
}
BitsPerSample = bitsPerSample;
#endregion bitspersample
if ((headerBuffer[3] & 0x01) != 0) // reserved bit -> 0
{
Error("Invalid FlacFrame. Reservedbit_1 is 1", loggerLocation);
return(false);
}
//reader.SkipBits(4 * 8); //erste 3 bytes headerbytes überspringen, da diese schon ohne reader verarbeitet
reader.ReadBits(32);
//BYTE 4
#region utf8
//variable blocksize
if ((headerBuffer[1] & 0x01) != 0 ||
(streamInfo != null && streamInfo.MinBlockSize != streamInfo.MaxBlockSize))
{
ulong samplenumber;
if (reader.ReadUTF8_64(out samplenumber) && samplenumber != ulong.MaxValue)
{
NumberType = FlacNumberType.SampleNumber;
SampleNumber = samplenumber;
}
else
{
Error("Invalid UTF8 Samplenumber coding.", loggerLocation);
return(false);
}
}
else //fixed blocksize
{
uint framenumber;// = reader.ReadUTF8();
if (reader.ReadUTF8_32(out framenumber) && framenumber != uint.MaxValue)
{
NumberType = FlacNumberType.FrameNumber;
FrameNumber = framenumber;
}
else
{
Error("Invalid UTF8 Framenumber coding.", loggerLocation);
return(false);
}
}
#endregion utf8
#region read hints
//blocksize am ende des frameheaders
if (blocksize_hint != 0)
{
x = (int)reader.ReadBits(8);
if (blocksize_hint == 7)
{
x = (x << 8) | (int)reader.ReadBits(8);
}
BlockSize = x + 1;
}
//samplerate am ende des frameheaders
if (sampleRate_hint != 0)
{
x = (int)reader.ReadBits(8);
if (sampleRate_hint != 12)
{
x = (x << 8) | (int)reader.ReadBits(8);
}
if (sampleRate_hint == 12)
{
SampleRate = x * 1000;
}
else if (sampleRate_hint == 13)
{
SampleRate = x;
}
else
{
SampleRate = x * 10;
}
}
#endregion read hints
//if (Channels == 1 && BitsPerSample == 24 && SampleRate == 44100)
// System.Diagnostics.Debugger.Break();
if (DoCRC)
{
var crc8 = CSMath.CRC8.Instance.CalcCheckSum(reader.Buffer, 0, reader.Position);
CRC8 = (byte)reader.ReadBits(8);
if (CRC8 != crc8)
{
Error("CRC8 missmatch", loggerLocation);
return(false);
}
}
headerBuffer += reader.Position;
return(true);
}
Error("Invalid Syncbits", loggerLocation);
return(false);
}
