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ZSTD_getPrice

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This commit is contained in:
inikep 2016-02-03 17:25:42 +01:00
parent d02506c186
commit 78e5ea3a32
2 changed files with 36 additions and 1 deletions
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2
lib/zstd_compress.c
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@ -2305,7 +2305,7 @@ static const ZSTD_parameters ZSTD_defaultParameters[4][ZSTD_MAX_CLEVEL+1] = {
{ 0, 22, 20, 22, 4, 4, ZSTD_lazy2 }, /* level 11 + L=4 */ // 41902762 lazy1=42087013 norep1=42911693 { 0, 22, 20, 22, 4, 4, ZSTD_lazy2 }, /* level 11 + L=4 */ // 41902762 lazy1=42087013 norep1=42911693
{ 0, 23, 21, 22, 5, 4, ZSTD_btlazy2 }, /* level 16 + L=4 */ // 41233150 btlazy1=41560211 norep1=42322286 { 0, 23, 21, 22, 5, 4, ZSTD_btlazy2 }, /* level 16 + L=4 */ // 41233150 btlazy1=41560211 norep1=42322286
{ 0, 23, 21, 22, 5, 4, ZSTD_opt }, /* level 23 */ { 0, 23, 21, 22, 5, 4, ZSTD_opt }, /* level 23 */
{ 0, 23, 21, 22, 5, 4, ZSTD_opt_bt }, /* level 23 */ { 0, 23, 21, 22, 5, 4, ZSTD_opt_bt }, /* level 24 */
}, },
{ /* for srcSize <= 256 KB */ { /* for srcSize <= 256 KB */
/* W, C, H, S, L, strat */ /* W, C, H, S, L, strat */

35
lib/zstd_opt.c
View File

@ -64,6 +64,41 @@ FORCE_INLINE U32 LZ5HC_get_price(U32 litlen, U32 offset, U32 mlen)
return lit_cost + match_cost; return lit_cost + match_cost;
} }
MEM_STATIC size_t ZSTD_getPrice(seqStore_t* seqStorePtr, size_t litLength, const BYTE* literals, size_t offsetCode, size_t matchCode)
{
#if 0
static const BYTE* g_start = NULL;
if (g_start==NULL) g_start = literals;
//if (literals - g_start == 8695)
printf("pos %6u : %3u literals & match %3u bytes at distance %6u \n",
(U32)(literals - g_start), (U32)litLength, (U32)matchCode+4, (U32)offsetCode);
#endif
size_t price = 0;
/* literals */
seqStorePtr->lit += litLength;
/* literal Length */
if (litLength >= MaxLL) {
*(seqStorePtr->litLength++) = MaxLL;
if (litLength<255 + MaxLL) price += 8; else price += 32;
}
else *(seqStorePtr->litLength++) = (BYTE)litLength;
/* match offset */
*(seqStorePtr->offset++) = (U32)offsetCode;
/* match Length */
if (matchCode >= MaxML) {
*(seqStorePtr->matchLength++) = MaxML;
if (matchCode < 255+MaxML) price += 8; else price += 32;
}
else *(seqStorePtr->matchLength++) = (BYTE)matchCode;
return price;
}
#define SET_PRICE(pos, mlen, offset, litlen, price) \ #define SET_PRICE(pos, mlen, offset, litlen, price) \
{ \ { \