diff options
Diffstat (limited to 'src/liblzma/lzma/lzma_encoder_presets.c')
| -rw-r--r-- | src/liblzma/lzma/lzma_encoder_presets.c | 50 |
1 files changed, 32 insertions, 18 deletions
diff --git a/src/liblzma/lzma/lzma_encoder_presets.c b/src/liblzma/lzma/lzma_encoder_presets.c index 08f339e9..7ef3509e 100644 --- a/src/liblzma/lzma/lzma_encoder_presets.c +++ b/src/liblzma/lzma/lzma_encoder_presets.c @@ -20,10 +20,11 @@ #include "common.h" +/* #define pow2(e) (UINT32_C(1) << (e)) -LZMA_API const lzma_options_lzma lzma_preset_lzma[9] = { +static const lzma_options_lzma presets[9] = { // dict lc lp pb mode fb mf mfc { pow2(16), NULL, 0, 3, 0, 2, false, LZMA_MODE_FAST, 64, LZMA_MF_HC3, 0, 0, 0, 0, 0, NULL, NULL }, { pow2(20), NULL, 0, 3, 0, 0, false, LZMA_MODE_FAST, 64, LZMA_MF_HC4, 0, 0, 0, 0, 0, NULL, NULL }, @@ -37,30 +38,43 @@ LZMA_API const lzma_options_lzma lzma_preset_lzma[9] = { }; -/* extern LZMA_API lzma_bool -lzma_preset_lzma(lzma_options_lzma *options, uint32_t level) +lzma_lzma_preset(lzma_options_lzma *options, uint32_t level) { - *options = (lzma_options_lzma){ + if (level >= ARRAY_SIZE(presetes)) + return true; - }; + *options = presets[level]; + return false; +} +*/ - options->literal_context_bits = LZMA_LITERAL_CONTEXT_BITS_DEFAULT - options->literal_pos_bits = LZMA_LITERAL_POS_BITS_DEFAULT; - options->pos_bits = LZMA_POS_BITS_DEFAULT; - options->preset_dictionary = NULL; - options->preset_dictionary_size = 0; - options->persistent = false; - options->mode = level <= 2 ? LZMA_MODE_FAST : LZMA_MODE_NORMAL; - options->fast_bytes = level <= +extern LZMA_API lzma_bool +lzma_lzma_preset(lzma_options_lzma *options, uint32_t level) +{ + if (level >= 9) + return true; + + memzero(options, sizeof(*options)); - options->match_finder = level == 1 ? LZMA_MF_HC3 - : (level == 2 ? LZMA_MF_HC4 : LZMA_MF_BT4); - options->match_finder_cycles = 0; + static const uint8_t shift[9] = { 16, 20, 19, 20, 21, 22, 23, 24, 25 }; + options->dict_size = UINT32_C(1) << shift[level]; + options->preset_dict = NULL; + options->preset_dict_size = 0; + options->lc = LZMA_LC_DEFAULT; + options->lp = LZMA_LP_DEFAULT; + options->pb = LZMA_PB_DEFAULT; - options->dictionary_size = + options->persistent = false; + options->mode = level <= 2 ? LZMA_MODE_FAST : LZMA_MODE_NORMAL; + + options->nice_len = level <= 5 ? 32 : 64; + options->mf = level <= 1 ? LZMA_MF_HC3 : level <= 2 ? LZMA_MF_HC4 + : LZMA_MF_BT4; + options->depth = 0; + + return false; } -*/ |