| # Copyright (c) 2020 Linumiz |
| # SPDX-License-Identifier: Apache-2.0 |
| |
| config ZEPHYR_LZ4_MODULE |
| bool |
| |
| menuconfig LZ4 |
| bool "Lz4 data compression and decompression" |
| help |
| This option enables lz4 compression & decompression library |
| support. |
| if LZ4 |
| |
| config LZ4_MEMORY_USAGE |
| int "Lz4 memory usage" |
| range 10 20 |
| default 14 |
| help |
| Increasing memory usage improves compression ratio, but usually at the |
| cost of speed, due to cache locality. Memory usage 2^value (10 -> 1KB, |
| 12 -> 4KB, 20 -> 1MB). |
| |
| config LZ4_DISABLE_DYNAMIC_MEMORY_ALLOCATION |
| bool "Disable dynamic memory allocation" |
| help |
| Disable lz4 functions that use dynamic memory allocation functions. |
| |
| choice LZ4_HEAPMODE |
| prompt "How stateless compression functions allocate memory for their hash table" |
| default LZ4_HEAPMODE_HEAP |
| |
| config LZ4_HEAPMODE_STACK |
| bool "in memory stack" |
| help |
| Allocate memory from stack (fastest). |
| |
| config LZ4_HEAPMODE_HEAP |
| bool "in memory heap" |
| depends on !LZ4_DISABLE_DYNAMIC_MEMORY_ALLOCATION |
| help |
| Allocate memory from heap (requires malloc()). |
| endchoice |
| |
| config LZ4_HIGH_COMPRESSION_VARIANT |
| bool "Lz4 high compression variant" |
| help |
| For more compression ratio at the cost of compression speed, |
| the High Compression variant called lz4hc is available. This variant |
| also compresses data using the lz4 block format. |
| |
| if LZ4_HIGH_COMPRESSION_VARIANT |
| choice LZ4HC_HEAPMODE |
| prompt "How stateless HC compression functions allocate memory for their workspace" |
| default LZ4HC_HEAPMODE_HEAP |
| |
| config LZ4HC_HEAPMODE_STACK |
| bool "in memory stack" |
| help |
| Allocate memory from stack (fastest). |
| |
| config LZ4HC_HEAPMODE_HEAP |
| bool "in memory heap" |
| depends on !LZ4_DISABLE_DYNAMIC_MEMORY_ALLOCATION |
| help |
| Allocate memory from heap (requires malloc()). |
| endchoice |
| endif |
| |
| config LZ4_XX_HASH |
| bool "xxHash hashing algorithm" |
| help |
| Build xxHash library included in lz4 sources. |
| |
| config LZ4_FRAME_SUPPORT |
| bool "LZ4 frame support" |
| select LZ4_XX_HASH |
| select LZ4_HIGH_COMPRESSION_VARIANT |
| help |
| In order to produce compressed data compatible with lz4 command line |
| utility, it's necessary to use the official interoperable frame format. |
| This format is generated and decoded automatically by the lz4frame library. |
| Its public API is described in lib/lz4frame.h. |
| |
| if LZ4_FRAME_SUPPORT |
| choice LZ4F_HEAPMODE |
| prompt "Control how LZ4F_compressFrame() allocates the Compression State" |
| default LZ4F_HEAPMODE_STACK |
| |
| config LZ4F_HEAPMODE_STACK |
| bool "in memory stack" |
| help |
| Allocate memory from stack (fastest). |
| |
| config LZ4F_HEAPMODE_HEAP |
| bool "in memory heap" |
| depends on !LZ4_DISABLE_DYNAMIC_MEMORY_ALLOCATION |
| help |
| Allocate memory from heap (requires malloc()). |
| endchoice |
| endif |
| |
| endif |
