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This commit is contained in:
Igor Pavlov
2021-07-22 23:00:14 +01:00
committed by Kornel
parent 4a960640a3
commit 585698650f
619 changed files with 34904 additions and 10859 deletions
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37
CPP/7zip/ICoder.h
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@@ -131,7 +131,8 @@ namespace NCoderPropID
kBlockSize2, // VT_UI4 or VT_UI8
kCheckSize, // VT_UI4 : size of digest in bytes
kFilter, // VT_BSTR
kMemUse // VT_UI8
kMemUse, // VT_UI8
kAffinity // VT_UI8
};
}
@@ -198,6 +199,22 @@ CODER_INTERFACE(ICompressSetMemLimit, 0x28)
};
/*
ICompressReadUnusedFromInBuf is supported by ICoder object
call ReadUnusedFromInBuf() after ICoder::Code(inStream, ...).
ICoder::Code(inStream, ...) decodes data, and the ICoder object is allowed
to read from inStream to internal buffers more data than minimal data required for decoding.
So we can call ReadUnusedFromInBuf() from same ICoder object to read unused input
data from the internal buffer.
in ReadUnusedFromInBuf(): the Coder is not allowed to use (ISequentialInStream *inStream) object, that was sent to ICoder::Code().
*/
CODER_INTERFACE(ICompressReadUnusedFromInBuf, 0x29)
{
STDMETHOD(ReadUnusedFromInBuf)(void *data, UInt32 size, UInt32 *processedSize) PURE;
};
CODER_INTERFACE(ICompressGetSubStreamSize, 0x30)
{
@@ -284,8 +301,24 @@ CODER_INTERFACE(ICompressSetInStreamSize2, 0x39)
/*
ICompressFilter
Filter() converts as most as possible bytes
Filter() converts as most as possible bytes required for fast processing.
Some filters have (smallest_fast_block).
For example, (smallest_fast_block == 16) for AES CBC/CTR filters.
If data stream is not finished, caller must call Filter() for larger block:
where (size >= smallest_fast_block).
if (size >= smallest_fast_block)
{
The filter can leave some bytes at the end of data without conversion:
if there are data alignment reasons or speed reasons.
The caller must read additional data from stream and call Filter() again.
}
If data stream was finished, caller can call Filter() for (size < smallest_fast_block)
data : must be aligned for at least 16 bytes for some filters (AES)
returns: (outSize):
if (outSize == 0) : Filter have not converted anything.
So the caller can stop processing, if data stream was finished.
if (outSize <= size) : Filter have converted outSize bytes
if (outSize > size) : Filter have not converted anything.
and it needs at least outSize bytes to convert one block