d851bb9e86
- Add possibility to disable functions that use heap. This is to reduce code size and prevent accidental use of heap. - Add possibility to compile xxhash library, "Extremely Fast Hash algorithm" in. It might be sometimes needed as a standalone, but especially lz4frame requires it. - Add possibility to compile also hc and lz4frame modules. The config options include possibility to configure will heap or stack be used. Defaults are set according to lz4's current defaults. Signed-off-by: Miika Karanki <miika.karanki@vaisala.com>
102 lines
2.6 KiB
Text
102 lines
2.6 KiB
Text
# 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
|