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-rw-r--r--src/lib/lib7z/Ppmd8Enc.c161
1 files changed, 0 insertions, 161 deletions
diff --git a/src/lib/lib7z/Ppmd8Enc.c b/src/lib/lib7z/Ppmd8Enc.c
deleted file mode 100644
index 87a3e344495..00000000000
--- a/src/lib/lib7z/Ppmd8Enc.c
+++ /dev/null
@@ -1,161 +0,0 @@
-/* Ppmd8Enc.c -- PPMdI Encoder
-2010-04-16 : Igor Pavlov : Public domain
-This code is based on:
- PPMd var.I (2002): Dmitry Shkarin : Public domain
- Carryless rangecoder (1999): Dmitry Subbotin : Public domain */
-
-#include "Ppmd8.h"
-
-#define kTop (1 << 24)
-#define kBot (1 << 15)
-
-void Ppmd8_RangeEnc_FlushData(CPpmd8 *p)
-{
- unsigned i;
- for (i = 0; i < 4; i++, p->Low <<= 8 )
- p->Stream.Out->Write(p->Stream.Out, (Byte)(p->Low >> 24));
-}
-
-static void RangeEnc_Normalize(CPpmd8 *p)
-{
- while ((p->Low ^ (p->Low + p->Range)) < kTop ||
- (p->Range < kBot && ((p->Range = (0 - p->Low) & (kBot - 1)), 1)))
- {
- p->Stream.Out->Write(p->Stream.Out, (Byte)(p->Low >> 24));
- p->Range <<= 8;
- p->Low <<= 8;
- }
-}
-
-static void RangeEnc_Encode(CPpmd8 *p, UInt32 start, UInt32 size, UInt32 total)
-{
- p->Low += start * (p->Range /= total);
- p->Range *= size;
- RangeEnc_Normalize(p);
-}
-
-static void RangeEnc_EncodeBit_0(CPpmd8 *p, UInt32 size0)
-{
- p->Range >>= 14;
- p->Range *= size0;
- RangeEnc_Normalize(p);
-}
-
-static void RangeEnc_EncodeBit_1(CPpmd8 *p, UInt32 size0)
-{
- p->Low += size0 * (p->Range >>= 14);
- p->Range *= ((1 << 14) - size0);
- RangeEnc_Normalize(p);
-}
-
-
-#define MASK(sym) ((signed char *)charMask)[sym]
-
-void Ppmd8_EncodeSymbol(CPpmd8 *p, int symbol)
-{
- size_t charMask[256 / sizeof(size_t)];
- if (p->MinContext->NumStats != 0)
- {
- CPpmd_State *s = Ppmd8_GetStats(p, p->MinContext);
- UInt32 sum;
- unsigned i;
- if (s->Symbol == symbol)
- {
- RangeEnc_Encode(p, 0, s->Freq, p->MinContext->SummFreq);
- p->FoundState = s;
- Ppmd8_Update1_0(p);
- return;
- }
- p->PrevSuccess = 0;
- sum = s->Freq;
- i = p->MinContext->NumStats;
- do
- {
- if ((++s)->Symbol == symbol)
- {
- RangeEnc_Encode(p, sum, s->Freq, p->MinContext->SummFreq);
- p->FoundState = s;
- Ppmd8_Update1(p);
- return;
- }
- sum += s->Freq;
- }
- while (--i);
-
- PPMD_SetAllBitsIn256Bytes(charMask);
- MASK(s->Symbol) = 0;
- i = p->MinContext->NumStats;
- do { MASK((--s)->Symbol) = 0; } while (--i);
- RangeEnc_Encode(p, sum, p->MinContext->SummFreq - sum, p->MinContext->SummFreq);
- }
- else
- {
- UInt16 *prob = Ppmd8_GetBinSumm(p);
- CPpmd_State *s = Ppmd8Context_OneState(p->MinContext);
- if (s->Symbol == symbol)
- {
- RangeEnc_EncodeBit_0(p, *prob);
- *prob = (UInt16)PPMD_UPDATE_PROB_0(*prob);
- p->FoundState = s;
- Ppmd8_UpdateBin(p);
- return;
- }
- else
- {
- RangeEnc_EncodeBit_1(p, *prob);
- *prob = (UInt16)PPMD_UPDATE_PROB_1(*prob);
- p->InitEsc = PPMD8_kExpEscape[*prob >> 10];
- PPMD_SetAllBitsIn256Bytes(charMask);
- MASK(s->Symbol) = 0;
- p->PrevSuccess = 0;
- }
- }
- for (;;)
- {
- UInt32 escFreq;
- CPpmd_See *see;
- CPpmd_State *s;
- UInt32 sum;
- unsigned i, numMasked = p->MinContext->NumStats;
- do
- {
- p->OrderFall++;
- if (!p->MinContext->Suffix)
- return; /* EndMarker (symbol = -1) */
- p->MinContext = Ppmd8_GetContext(p, p->MinContext->Suffix);
- }
- while (p->MinContext->NumStats == numMasked);
-
- see = Ppmd8_MakeEscFreq(p, numMasked, &escFreq);
- s = Ppmd8_GetStats(p, p->MinContext);
- sum = 0;
- i = p->MinContext->NumStats + 1;
- do
- {
- int cur = s->Symbol;
- if (cur == symbol)
- {
- UInt32 low = sum;
- CPpmd_State *s1 = s;
- do
- {
- sum += (s->Freq & (int)(MASK(s->Symbol)));
- s++;
- }
- while (--i);
- RangeEnc_Encode(p, low, s1->Freq, sum + escFreq);
- Ppmd_See_Update(see);
- p->FoundState = s1;
- Ppmd8_Update2(p);
- return;
- }
- sum += (s->Freq & (int)(MASK(cur)));
- MASK(cur) = 0;
- s++;
- }
- while (--i);
-
- RangeEnc_Encode(p, sum, escFreq, sum + escFreq);
- see->Summ = (UInt16)(see->Summ + sum + escFreq);
- }
-}