public FlacResidual(FlacBitReader reader, FlacFrameHeader header, FlacSubFrameData data, int order)
{
FlacEntropyCoding codingMethod = (FlacEntropyCoding)reader.ReadBits(FlacConstant.ENTROPY_CODING_METHOD_TYPE_LEN); // 2 Bit
int riceOrder = -1;
if (codingMethod == FlacEntropyCoding.PartitionedRice || codingMethod == FlacEntropyCoding.PartitionedRice2)
{
riceOrder = (int)reader.ReadBits(FlacConstant.ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN); // 4 Bit
FlacPartitionedRice rice = new FlacPartitionedRice(riceOrder, codingMethod, data.Content);
if (rice.ProcessResidual(reader, header, data, order) == false)
{
throw new FlacException("Decoding Flac Residual failed.", FlacLayer.SubFrame);
}
CodingMethod = codingMethod;
RiceOrder = riceOrder;
Rice = rice;
}
else
{
throw new FlacException("Not supported RICE-Coding-Method. Stream unparseable!", FlacLayer.SubFrame);
}
}
public FlacResidual(FlacBitReader reader, FlacFrameHeader header, FlacSubFrameData data, int order)
{
FlacEntropyCoding codingMethod = (FlacEntropyCoding)reader.ReadBits(FlacConstant.EntropyCodingMethodTypeLen); // 2 Bit
if (codingMethod == FlacEntropyCoding.PartitionedRice || codingMethod == FlacEntropyCoding.PartitionedRice2)
{
int riceOrder = (int)reader.ReadBits(FlacConstant.EntropyCodingMethodPartitionedRiceOrderLen);
FlacPartitionedRice rice = new FlacPartitionedRice(riceOrder, codingMethod, data.Content);
if (rice.ProcessResidual(reader, header, data, order) == false)
{
throw new FlacException("Decoding Flac Residual failed.", FlacLayer.SubFrame);
}
#if DEBUG
CodingMethod = codingMethod;
RiceOrder = riceOrder;
Rice = rice;
#endif
}
else
{
throw new FlacException("Not supported RICE-Coding-Method. Stream unparseable!", FlacLayer.SubFrame);
}
}
public FlacResidual(FlacBitReader reader, FlacFrameHeader header, FlacSubFrameData data, int order)
{
FlacEntropyCoding codingMethod = (FlacEntropyCoding)reader.ReadBits(FlacConstant.EntropyCodingMethodTypeLen); // 2 Bit
if (codingMethod == FlacEntropyCoding.PartitionedRice || codingMethod == FlacEntropyCoding.PartitionedRice2)
{
int riceOrder = (int)reader.ReadBits(FlacConstant.EntropyCodingMethodPartitionedRiceOrderLen);
FlacPartitionedRice rice = new FlacPartitionedRice(riceOrder, codingMethod, data.Content);
if (rice.ProcessResidual(reader, header, data, order) == false)
{
throw new FlacException("Decoding Flac Residual failed.", FlacLayer.SubFrame);
}
#if DEBUG
CodingMethod = codingMethod;
RiceOrder = riceOrder;
Rice = rice;
#endif
}
else
{
throw new FlacException("Not supported RICE-Coding-Method. Stream unparseable!", FlacLayer.SubFrame);
}
}
public FlacResidual(FlacBitReader reader, FlacFrameHeader header, FlacSubFrameData data, int order)
{
FlacEntropyCoding codingMethod = (FlacEntropyCoding)reader.ReadBits(FlacConstant.ENTROPY_CODING_METHOD_TYPE_LEN); // 2 Bit
int riceOrder = -1;
if (codingMethod == FlacEntropyCoding.PartitionedRice || codingMethod == FlacEntropyCoding.PartitionedRice2)
{
riceOrder = (int)reader.ReadBits(FlacConstant.ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN); // 4 Bit
FlacPartitionedRice rice = new FlacPartitionedRice(riceOrder, codingMethod, data.Content);
if (rice.ProcessResidual(reader, header, data, order) == false)
{
throw new FlacException("Decoding Flac Residual failed.", FlacLayer.SubFrame);
}
CodingMethod = codingMethod;
RiceOrder = riceOrder;
Rice = rice;
}
else
{
throw new FlacException("Not supported RICE-Coding-Method. Stream unparseable!", FlacLayer.SubFrame);
}
}
public FlacSubFrameConstant(FlacBitReader reader, FlacFrameHeader header, FlacSubFrameData data, int bps)
: base(header)
{
Value = (int)reader.ReadBits(bps);
unsafe
{
for (int i = 0; i < header.BlockSize; i++)
{
int* ptr = data.destBuffer;
*ptr++ = Value;
}
}
}
public FlacSubFrameConstant(FlacBitReader reader, FlacFrameHeader header, FlacSubFrameData data, int bps)
: base(header)
{
Value = (int)reader.ReadBits(bps);
unsafe
{
for (int i = 0; i < header.BlockSize; i++)
{
int *ptr = data.destBuffer;
* ptr++ = Value;
}
}
}
public FlacSubFrameVerbatim(FlacBitReader reader, FlacFrameHeader header, FlacSubFrameData data, int bps)
: base(header)
{
unsafe
{
int *ptrDest = data.DestBuffer, ptrResidual = data.ResidualBuffer;
for (int i = 0; i < header.BlockSize; i++)
{
int x = (int)reader.ReadBits(bps);
* ptrDest++ = x;
* ptrResidual++ = x;
}
}
}
public FlacSubFrameVerbatim(FlacBitReader reader, FlacFrameHeader header, FlacSubFrameData data, int bps)
: base(header)
{
unsafe
{
int* ptrDest = data.DestBuffer, ptrResidual = data.ResidualBuffer;
for (int i = 0; i < header.BlockSize; i++)
{
int x = (int)reader.ReadBits(bps);
*ptrDest++ = x;
*ptrResidual++ = x;
}
}
}
public FlacSubFrameConstant(FlacBitReader reader, FlacFrameHeader header, FlacSubFrameData data, int bitsPerSample)
: base(header)
{
int value = (int)reader.ReadBits(bitsPerSample);
#if FLAC_DEBUG
Value = value;
#endif
unsafe
{
int* pDestinationBuffer = data.DestinationBuffer;
for (int i = 0; i < header.BlockSize; i++)
{
*pDestinationBuffer++ = value;
}
}
}
public FlacSubFrameConstant(FlacBitReader reader, FlacFrameHeader header, FlacSubFrameData data, int bitsPerSample)
: base(header)
{
int value = (int)reader.ReadBits(bitsPerSample);
#if FLAC_DEBUG
Value = value;
#endif
unsafe
{
int *pDestinationBuffer = data.DestinationBuffer;
for (int i = 0; i < header.BlockSize; i++)
{
*pDestinationBuffer++ = value;
}
}
}
public static unsafe void ProcessResidual(FlacBitReader reader, FlacFrameHeader header, FlacSubFrameData data,
int order, int partitionOrder, FlacResidualCodingMethod codingMethod)
{
data.Content.UpdateSize(partitionOrder);
bool isRice2 = codingMethod == FlacResidualCodingMethod.PartitionedRice2;
int riceParameterLength = isRice2 ? 5 : 4;
int escapeCode = isRice2 ? 31 : 15; //11111 : 1111
int samplesPerPartition;
int partitionCount = 1 << partitionOrder; //2^partitionOrder -> There will be 2^order partitions. -> "order" = partitionOrder in this case
int* residualBuffer = data.ResidualBuffer + order;
for (int p = 0; p < partitionCount; p++)
{
if (partitionOrder == 0)
samplesPerPartition = header.BlockSize - order;
else if (p > 0)
samplesPerPartition = header.BlockSize >> partitionOrder;
else
samplesPerPartition = (header.BlockSize >> partitionOrder) - order;
var riceParameter = reader.ReadBits(riceParameterLength);
data.Content.Parameters[p] = (int)riceParameter;
if (riceParameter >= escapeCode)
{
var raw = reader.ReadBits(5); //raw is always 5 bits (see ...(+5))
data.Content.RawBits[p] = (int)raw;
for (int i = 0; i < samplesPerPartition; i++)
{
int sample = reader.ReadBitsSigned((int)raw);
*(residualBuffer) = sample;
residualBuffer++;
}
}
else
{
ReadFlacRiceBlock(reader, samplesPerPartition, (int)riceParameter, residualBuffer);
residualBuffer += samplesPerPartition;
}
}
}
public FlacResidual(FlacBitReader reader, FlacFrameHeader header, FlacSubFrameData data, int order)
{
FlacResidualCodingMethod codingMethod = (FlacResidualCodingMethod)reader.ReadBits(2); // 2 Bit
if (codingMethod == FlacResidualCodingMethod.PartitionedRice || codingMethod == FlacResidualCodingMethod.PartitionedRice2)
{
int partitionOrder = (int)reader.ReadBits(4); //"Partition order." see https://xiph.org/flac/format.html#partitioned_rice and https://xiph.org/flac/format.html#partitioned_rice2
FlacPartitionedRice.ProcessResidual(reader, header, data, order, partitionOrder, codingMethod);
#if FLAC_DEBUG
CodingMethodMethod = codingMethod;
PartitionOrder = partitionOrder;
#endif
}
else
{
throw new FlacException("Not supported RICE-Coding-Method. Stream unparseable!", FlacLayer.SubFrame);
}
}
public FlacResidual(FlacBitReader reader, FlacFrameHeader header, FlacSubFrameData data, int order)
{
FlacResidualCodingMethod codingMethod = (FlacResidualCodingMethod)reader.ReadBits(2); // 2 Bit
if (codingMethod == FlacResidualCodingMethod.PartitionedRice || codingMethod == FlacResidualCodingMethod.PartitionedRice2)
{
int partitionOrder = (int)reader.ReadBits(4); //"Partition order." see https://xiph.org/flac/format.html#partitioned_rice and https://xiph.org/flac/format.html#partitioned_rice2
FlacPartitionedRice.ProcessResidual(reader, header, data, order, partitionOrder, codingMethod);
#if FLAC_DEBUG
CodingMethodMethod = codingMethod;
PartitionOrder = partitionOrder;
#endif
}
else
{
throw new FlacException("Not supported RICE-Coding-Method. Stream unparseable!", FlacLayer.SubFrame);
}
}
public static unsafe void ProcessResidual(FlacBitReader reader, FlacFrameHeader header, FlacSubFrameData data,
int order, int partitionOrder, FlacResidualCodingMethod codingMethod)
{
data.Content.UpdateSize(partitionOrder);
bool isRice2 = codingMethod == FlacResidualCodingMethod.PartitionedRice2;
int riceParameterLength = isRice2 ? 5 : 4;
int escapeCode = isRice2 ? 31 : 15; //11111 : 1111
int samplesPerPartition;
int partitionCount = 1 << partitionOrder; //2^partitionOrder -> There will be 2^order partitions. -> "order" = partitionOrder in this case
int *residualBuffer = data.ResidualBuffer + order;
for (int p = 0; p < partitionCount; p++)
{
if (partitionOrder == 0)
{
samplesPerPartition = header.BlockSize - order;
}
else if (p > 0)
{
samplesPerPartition = header.BlockSize >> partitionOrder;
}
else
{
samplesPerPartition = (header.BlockSize >> partitionOrder) - order;
}
var riceParameter = reader.ReadBits(riceParameterLength);
data.Content.Parameters[p] = (int)riceParameter;
if (riceParameter >= escapeCode)
{
var raw = reader.ReadBits(5); //raw is always 5 bits (see ...(+5))
data.Content.RawBits[p] = (int)raw;
for (int i = 0; i < samplesPerPartition; i++)
{
int sample = reader.ReadBitsSigned((int)raw);
*(residualBuffer) = sample;
residualBuffer++;
}
}
else
{
ReadFlacRiceBlock(reader, samplesPerPartition, (int)riceParameter, residualBuffer);
residualBuffer += samplesPerPartition;
}
}
}
