Visible to Intel only — GUID: GUID-46BC0389-91C6-47E0-A0A7-BE4B12266D85
Visible to Intel only — GUID: GUID-46BC0389-91C6-47E0-A0A7-BE4B12266D85
Special Parameters
The ZLIB coding functions have several special parameters.
The comprLevel parameter specifies the level of compression rate and compression ratio. The table below lists the possible values of the comprLevel parameter and their meanings.
Value | Descriptions |
---|---|
IppLZ77FastCompr | Fast compression, maximum compression rate, and below average compression ratio |
IppLZ77AverageCompr | Average compression rate, average compression ratio |
IppLZ77BestCompr | Slow compression, maximum compression ratio |
The checksum parameter specifies what algorithm is used to compute checksum for input data. The table below lists the possible values of the checksum parameter and their meanings.
Value | Description |
---|---|
IppLZ77NoChcksm | Checksum is not calculated. |
IppLZ77Adler32 | Checksum is calculated using Adler32 algorithm. |
IppLZ77CRC32 | Checksum is calculated using the CRC32 algorithm. |
The flush parameter specifies the encoding mode for data block encoding. The table below lists the possible values of the flush parameter and their meanings.
Value | Descriptions |
---|---|
IppLZ77NoFlush | The end of the block is aligned to a byte boundary. |
IppLZ77SyncFlush | The end of the block is aligned to a byte boundary, and 4-byte marker is written to pDst. |
IppLZ77FullFlush | The end of the block is aligned to a byte boundary, 4-byte marker is written to pDst, sliding dictionary is zeroed. |
IppLZ77FinishFlush | The end of the block is aligned to a byte boundary and the function returns the ippStsStreamEnd status. |
The deflateStatus parameter specifies the encoding status to ensure the compatibility with the RFC1951 specification. This parameter is used by Intel IPP ZLIB encoding functions. The table below lists the possible values of the deflateStatus parameter and their meanings.
Value | Descriptions |
---|---|
IppLZ77StatusInit | Specified the deflate implementation of encoding functions, must be used before stream encoding. |
IppLZ77StatusLZ77Process | Call the deflate implementation of encoding function. |
IppLZ77StatusHuffProcess | Call the deflate implementation of the encoding function with the fixed Huffman codes. |
IppLZ77StatusFinal | Specified the last block in the stream. |
The inflateStatus parameter specifies the decoding status to ensure the compatibility with the RFC1951 specification. This parameter is used by Intel IPP ZLIB decoding functions. The table below lists the possible values of the inflateStatus parameter and their meanings.
Value | Descriptions |
---|---|
IppLZ77inflateStatusInit | Specified the deflate implementation of encoding functions, must be used before stream encoding. |
IppLZ77InflateStatusHuffProcess | Call the deflate implementation of the encoding function with the fixed Huffman codes. |
IppLZ77InflateStatusLZ77Process | Call the deflate implementation of encoding function. |
IppLZ77InflateStatusFinal | Specified the last block in the stream. |