krak/zstd
1
0
Fork 0
mirror of https://github.com/facebook/zstd.git synced 2025-10-31 08:37:43 +02:00
Code Issues Releases 1 Activity

ZSTD_getLiteralPrice

Browse Source
This commit is contained in:
inikep
2016-02-03 19:53:29 +01:00
parent 892776efd6
commit dbbedfbd95
1 changed files with 28 additions and 21 deletions
Download Patch File Download Diff File Expand all files Collapse all files

49
lib/zstd_opt.c
View File

@@ -32,13 +32,19 @@ typedef struct
#define ZSTD_OPT_NUM (1<<12)
#define ZSTD_LIT_ONLY_COST(len) (((len)<<3)+1+0)
#define ZSTD_LIT_COST(len) 0 //(((len)<<3)+0)
#define ZSTD_LIT_COST(len) (((len)<<3)+0)
FORCE_INLINE size_t ZSTD_get_price(seqStore_t* seqStorePtr, size_t litlen, const BYTE* literals, size_t offset, size_t mlen)
FORCE_INLINE size_t ZSTD_getLiteralPrice(seqStore_t* seqStorePtr, size_t litlen, const BYTE* literals)
{
size_t lit_cost = (litlen<<3)+0;
size_t lit_cost = (litlen<<3)+1+0;
return lit_cost;
}
FORCE_INLINE size_t ZSTD_getPrice(seqStore_t* seqStorePtr, size_t litlen, const BYTE* literals, size_t offset, size_t mlen)
{
size_t lit_cost = (litlen<<3)+0;
size_t match_cost = /*MLbits +*/ ZSTD_highbit((U32)mlen+1) + Offbits + ZSTD_highbit((U32)offset+1);
return lit_cost + match_cost;
}
@@ -555,7 +561,7 @@ void ZSTD_compressBlock_opt_generic(ZSTD_CCtx* ctx,
do
{
litlen = 0;
price = ZSTD_get_price(seqStorePtr, llen + 1, anchor, 0, mlen - MINMATCH) - ZSTD_LIT_COST(llen + 1);
price = ZSTD_getPrice(seqStorePtr, llen + 1, anchor, 0, mlen - MINMATCH) - ZSTD_LIT_COST(llen + 1);
if (mlen + 1 > last_pos || price < opt[mlen + 1].price)
SET_PRICE(mlen + 1, mlen, 0, litlen, price);
mlen--;
@@ -581,7 +587,8 @@ void ZSTD_compressBlock_opt_generic(ZSTD_CCtx* ctx,
// opt[0].mlen = opt[1].mlen = 1;
opt[0].rep = opt[0].rep2 = rep_1;
opt[0].mlen = 1;
// opt[0].price = ZSTD_getLiteralPrice(seqStorePtr, 1, ip);
if (match_num && matches[match_num-1].len > sufficient_len)
{
best_mlen = matches[match_num-1].len;
@@ -600,7 +607,7 @@ void ZSTD_compressBlock_opt_generic(ZSTD_CCtx* ctx,
while (mlen <= best_mlen)
{
litlen = 0;
price = ZSTD_get_price(seqStorePtr, llen + litlen, anchor, matches[i].off, mlen - MINMATCH) - ZSTD_LIT_COST(llen);
price = ZSTD_getPrice(seqStorePtr, llen + litlen, anchor, matches[i].off, mlen - MINMATCH) - ZSTD_LIT_COST(llen);
if (mlen > last_pos || price < opt[mlen].price)
SET_PRICE(mlen, mlen, matches[i].off, litlen, price);
mlen++;
@@ -624,20 +631,20 @@ void ZSTD_compressBlock_opt_generic(ZSTD_CCtx* ctx,
if (cur != litlen)
{
price = opt[cur - litlen].price + ZSTD_LIT_ONLY_COST(litlen);
price = opt[cur - litlen].price + ZSTD_getLiteralPrice(seqStorePtr, litlen, inr-litlen);
ZSTD_LOG_TRY_PRICE("%d: TRY1 opt[%d].price=%d price=%d cur=%d litlen=%d\n", (int)(inr-base), cur - litlen, opt[cur - litlen].price, price, cur, litlen);
}
else
{
price = ZSTD_LIT_ONLY_COST(llen + litlen) - llen;
price = ZSTD_getLiteralPrice(seqStorePtr, llen + litlen, inr-(llen+litlen)) - ZSTD_LIT_COST(llen);
ZSTD_LOG_TRY_PRICE("%d: TRY2 price=%d cur=%d litlen=%d llen=%d\n", (int)(inr-base), price, cur, litlen, llen);
}
}
else
{
litlen = 1;
price = opt[cur - 1].price + ZSTD_LIT_ONLY_COST(litlen);
ZSTD_LOG_TRY_PRICE("%d: TRY3 price=%d cur=%d litlen=%d litonly=%d\n", (int)(inr-base), price, cur, litlen, ZSTD_LIT_ONLY_COST(litlen));
price = opt[cur - 1].price + ZSTD_getLiteralPrice(seqStorePtr, litlen, inr-1);
ZSTD_LOG_TRY_PRICE("%d: TRY3 price=%d cur=%d litlen=%d litonly=%d\n", (int)(inr-base), price, cur, litlen, ZSTD_getLiteralPrice(seqStorePtr, litlen, inr-1));
}
mlen = 1;
@@ -707,20 +714,20 @@ void ZSTD_compressBlock_opt_generic(ZSTD_CCtx* ctx,
if (cur != litlen)
{
price = opt[cur - litlen].price + ZSTD_get_price(seqStorePtr, litlen, inr-litlen, 0, mlen - MINMATCH);
price = opt[cur - litlen].price + ZSTD_getPrice(seqStorePtr, litlen, inr-litlen, 0, mlen - MINMATCH);
ZSTD_LOG_TRY_PRICE("%d: TRY5 opt[%d].price=%d price=%d cur=%d litlen=%d\n", (int)(inr-base), cur - litlen, opt[cur - litlen].price, price, cur, litlen);
}
else
{
price = ZSTD_get_price(seqStorePtr, llen + litlen, anchor, 0, mlen - MINMATCH) - ZSTD_LIT_COST(llen);
price = ZSTD_getPrice(seqStorePtr, llen + litlen, anchor, 0, mlen - MINMATCH) - ZSTD_LIT_COST(llen);
ZSTD_LOG_TRY_PRICE("%d: TRY6 price=%d cur=%d litlen=%d llen=%d\n", (int)(inr-base), price, cur, litlen, llen);
}
}
else
{
litlen = 0;
price = opt[cur].price + ZSTD_get_price(seqStorePtr, 0, NULL, 0, mlen - MINMATCH);
ZSTD_LOG_TRY_PRICE("%d: TRY7 price=%d cur=%d litlen=0 getprice=%d\n", (int)(inr-base), price, cur, ZSTD_get_price(seqStorePtr, 0, NULL, 0, mlen - MINMATCH));
price = opt[cur].price + ZSTD_getPrice(seqStorePtr, 0, NULL, 0, mlen - MINMATCH);
ZSTD_LOG_TRY_PRICE("%d: TRY7 price=%d cur=%d litlen=0 getprice=%d\n", (int)(inr-base), price, cur, ZSTD_getPrice(seqStorePtr, 0, NULL, 0, mlen - MINMATCH));
}
best_mlen = mlen;
@@ -779,14 +786,14 @@ void ZSTD_compressBlock_opt_generic(ZSTD_CCtx* ctx,
litlen = opt[cur2].litlen;
if (cur2 != litlen)
price = opt[cur2 - litlen].price + ZSTD_get_price(seqStorePtr, litlen, ip+cur2-litlen, matches[i].off, mlen - MINMATCH);
price = opt[cur2 - litlen].price + ZSTD_getPrice(seqStorePtr, litlen, ip+cur2-litlen, matches[i].off, mlen - MINMATCH);
else
price = ZSTD_get_price(seqStorePtr, llen + litlen, anchor, matches[i].off, mlen - MINMATCH) - ZSTD_LIT_COST(llen);
price = ZSTD_getPrice(seqStorePtr, llen + litlen, anchor, matches[i].off, mlen - MINMATCH) - ZSTD_LIT_COST(llen);
}
else
{
litlen = 0;
price = opt[cur2].price + ZSTD_get_price(seqStorePtr, 0, NULL, matches[i].off, mlen - MINMATCH);
price = opt[cur2].price + ZSTD_getPrice(seqStorePtr, 0, NULL, matches[i].off, mlen - MINMATCH);
}
ZSTD_LOG_PARSER("%d: Found2 pred=%d mlen=%d best_mlen=%d off=%d price=%d litlen=%d price[%d]=%d\n", (int)(inr-base), matches[i].back, mlen, best_mlen, matches[i].off, price, litlen, cur - litlen, opt[cur - litlen].price);
@@ -820,19 +827,19 @@ void ZSTD_compressBlock_opt_generic(ZSTD_CCtx* ctx,
if (i != litlen)
{
price = opt[i - litlen].price + ZSTD_LIT_ONLY_COST(litlen);
price = opt[i - litlen].price + ZSTD_getLiteralPrice(seqStorePtr, litlen, ip+i-litlen);
ZSTD_LOG_TRY_PRICE("%d: TRY9 opt[%d].price=%d price=%d cur=%d litlen=%d\n", (int)(inr-base), i - litlen, opt[i - litlen].price, price, i, litlen);
}
else
{
price = ZSTD_LIT_ONLY_COST(llen + litlen) - llen;
price = ZSTD_getLiteralPrice(seqStorePtr, llen + litlen, ip+i-(llen + litlen)) - ZSTD_LIT_COST(llen);
ZSTD_LOG_TRY_PRICE("%d: TRY10 price=%d cur=%d litlen=%d llen=%d\n", (int)(inr-base), price, i, litlen, llen);
}
}
else
{
litlen = 1;
price = opt[i - 1].price + ZSTD_LIT_ONLY_COST(litlen);
price = opt[i - 1].price + ZSTD_getLiteralPrice(seqStorePtr, 1, ip+i-1);
ZSTD_LOG_TRY_PRICE("%d: TRY11 price=%d cur=%d litlen=%d\n", (int)(inr-base), price, i, litlen);
}