Lines Matching +full:- +full:p
1 /* Ppmd7.c -- PPMdH codec
2 2010-03-12 : Igor Pavlov : Public domain
12 #define Ppmd7_GetPtr(p, ptr) (ptr) argument
13 #define Ppmd7_GetContext(p, ptr) (ptr) argument
14 #define Ppmd7_GetStats(p, ctx) ((ctx)->Stats) argument
16 #define Ppmd7_GetPtr(p, offs) ((void *)((p)->Base + (offs))) argument
17 #define Ppmd7_GetContext(p, offs) ((CPpmd7_Context *)Ppmd7_GetPtr((p), (offs))) argument
18 #define Ppmd7_GetStats(p, ctx) ((CPpmd_State *)Ppmd7_GetPtr((p), ((ctx)->Stats))) argument
21 #define Ppmd7_GetBinSumm(p) \ argument
22 &p->BinSumm[Ppmd7Context_OneState(p->MinContext)->Freq - 1][p->PrevSuccess + \
23 p->NS2BSIndx[Ppmd7_GetContext(p, p->MinContext->Suffix)->NumStats - 1] + \
24 (p->HiBitsFlag = p->HB2Flag[p->FoundState->Symbol]) + \
25 2 * p->HB2Flag[Ppmd7Context_OneState(p->MinContext)->Symbol] + \
26 ((p->RunLength >> 26) & 0x20)]
33 #define U2I(nu) (p->Units2Indx[(nu) - 1])
34 #define I2U(indx) (p->Indx2Units[indx])
39 #define REF(ptr) ((UInt32)((Byte *)(ptr) - (p)->Base))
44 #define CTX(ref) ((CPpmd7_Context *)Ppmd7_GetContext(p, ref))
45 #define STATS(ctx) Ppmd7_GetStats(p, ctx)
47 #define SUFFIX(ctx) CTX((ctx)->Suffix)
75 #define NODE(offs) ((CPpmd7_Node *)(p->Base + (offs)))
78 static void Ppmd7_Update1(CPpmd7 *p);
79 static void Ppmd7_Update1_0(CPpmd7 *p);
80 static void Ppmd7_Update2(CPpmd7 *p);
81 static void Ppmd7_UpdateBin(CPpmd7 *p);
82 static CPpmd_See *Ppmd7_MakeEscFreq(CPpmd7 *p, unsigned numMasked,
85 /* ----------- Base ----------- */
87 static void Ppmd7_Construct(CPpmd7 *p) in Ppmd7_Construct() argument
91 p->Base = 0; in Ppmd7_Construct()
96 do { p->Units2Indx[k++] = (Byte)i; } while(--step); in Ppmd7_Construct()
97 p->Indx2Units[i] = (Byte)k; in Ppmd7_Construct()
100 p->NS2BSIndx[0] = (0 << 1); in Ppmd7_Construct()
101 p->NS2BSIndx[1] = (1 << 1); in Ppmd7_Construct()
102 memset(p->NS2BSIndx + 2, (2 << 1), 9); in Ppmd7_Construct()
103 memset(p->NS2BSIndx + 11, (3 << 1), 256 - 11); in Ppmd7_Construct()
106 p->NS2Indx[i] = (Byte)i; in Ppmd7_Construct()
109 p->NS2Indx[i] = (Byte)m; in Ppmd7_Construct()
110 if (--k == 0) in Ppmd7_Construct()
111 k = (++m) - 2; in Ppmd7_Construct()
114 memset(p->HB2Flag, 0, 0x40); in Ppmd7_Construct()
115 memset(p->HB2Flag + 0x40, 8, 0x100 - 0x40); in Ppmd7_Construct()
118 static void Ppmd7_Free(CPpmd7 *p) in Ppmd7_Free() argument
120 free(p->Base); in Ppmd7_Free()
121 p->Size = 0; in Ppmd7_Free()
122 p->Base = 0; in Ppmd7_Free()
125 static Bool Ppmd7_Alloc(CPpmd7 *p, UInt32 size) in Ppmd7_Alloc() argument
127 if (p->Base == 0 || p->Size != size) in Ppmd7_Alloc()
129 /* RestartModel() below assumes that p->Size >= UNIT_SIZE in Ppmd7_Alloc()
130 (see the calculation of m->MinContext). */ in Ppmd7_Alloc()
134 Ppmd7_Free(p); in Ppmd7_Alloc()
135 p->AlignOffset = in Ppmd7_Alloc()
137 (4 - size) & 3; in Ppmd7_Alloc()
139 4 - (size & 3); in Ppmd7_Alloc()
141 if ((p->Base = malloc(p->AlignOffset + size in Ppmd7_Alloc()
147 p->Size = size; in Ppmd7_Alloc()
152 static void InsertNode(CPpmd7 *p, void *node, unsigned indx) in InsertNode() argument
154 *((CPpmd_Void_Ref *)node) = p->FreeList[indx]; in InsertNode()
155 p->FreeList[indx] = REF(node); in InsertNode()
158 static void *RemoveNode(CPpmd7 *p, unsigned indx) in RemoveNode() argument
160 CPpmd_Void_Ref *node = (CPpmd_Void_Ref *)Ppmd7_GetPtr(p, p->FreeList[indx]); in RemoveNode()
161 p->FreeList[indx] = *node; in RemoveNode()
165 static void SplitBlock(CPpmd7 *p, void *ptr, unsigned oldIndx, unsigned newIndx) in SplitBlock() argument
167 unsigned i, nu = I2U(oldIndx) - I2U(newIndx); in SplitBlock()
171 unsigned k = I2U(--i); in SplitBlock()
172 InsertNode(p, ((Byte *)ptr) + U2B(k), nu - k - 1); in SplitBlock()
174 InsertNode(p, ptr, i); in SplitBlock()
177 static void GlueFreeBlocks(CPpmd7 *p) in GlueFreeBlocks() argument
183 CPpmd7_Node_Ref head = p->AlignOffset + p->Size; in GlueFreeBlocks()
189 p->GlueCount = 255; in GlueFreeBlocks()
191 /* create doubly-linked list of free blocks */ in GlueFreeBlocks()
195 CPpmd7_Node_Ref next = (CPpmd7_Node_Ref)p->FreeList[i]; in GlueFreeBlocks()
196 p->FreeList[i] = 0; in GlueFreeBlocks()
200 node->Next = n; in GlueFreeBlocks()
201 n = NODE(n)->Prev = next; in GlueFreeBlocks()
203 node->Stamp = 0; in GlueFreeBlocks()
204 node->NU = (UInt16)nu; in GlueFreeBlocks()
207 NODE(head)->Stamp = 1; in GlueFreeBlocks()
208 NODE(head)->Next = n; in GlueFreeBlocks()
209 NODE(n)->Prev = head; in GlueFreeBlocks()
210 if (p->LoUnit != p->HiUnit) in GlueFreeBlocks()
211 ((CPpmd7_Node *)p->LoUnit)->Stamp = 1; in GlueFreeBlocks()
217 UInt32 nu = (UInt32)node->NU; in GlueFreeBlocks()
221 nu += node2->NU; in GlueFreeBlocks()
222 if (node2->Stamp != 0 || nu >= 0x10000) in GlueFreeBlocks()
224 NODE(node2->Prev)->Next = node2->Next; in GlueFreeBlocks()
225 NODE(node2->Next)->Prev = node2->Prev; in GlueFreeBlocks()
226 node->NU = (UInt16)nu; in GlueFreeBlocks()
228 n = node->Next; in GlueFreeBlocks()
232 for (n = NODE(head)->Next; n != head;) in GlueFreeBlocks()
236 CPpmd7_Node_Ref next = node->Next; in GlueFreeBlocks()
237 for (nu = node->NU; nu > 128; nu -= 128, node += 128) in GlueFreeBlocks()
238 InsertNode(p, node, PPMD_NUM_INDEXES - 1); in GlueFreeBlocks()
241 unsigned k = I2U(--i); in GlueFreeBlocks()
242 InsertNode(p, node + k, nu - k - 1); in GlueFreeBlocks()
244 InsertNode(p, node, i); in GlueFreeBlocks()
249 static void *AllocUnitsRare(CPpmd7 *p, unsigned indx) in AllocUnitsRare() argument
253 if (p->GlueCount == 0) in AllocUnitsRare()
255 GlueFreeBlocks(p); in AllocUnitsRare()
256 if (p->FreeList[indx] != 0) in AllocUnitsRare()
257 return RemoveNode(p, indx); in AllocUnitsRare()
265 p->GlueCount--; in AllocUnitsRare()
266 return ((UInt32)(p->UnitsStart - p->Text) > numBytes) ? (p->UnitsStart -= numBytes) : (NULL); in AllocUnitsRare()
269 while (p->FreeList[i] == 0); in AllocUnitsRare()
270 retVal = RemoveNode(p, i); in AllocUnitsRare()
271 SplitBlock(p, retVal, i, indx); in AllocUnitsRare()
275 static void *AllocUnits(CPpmd7 *p, unsigned indx) in AllocUnits() argument
278 if (p->FreeList[indx] != 0) in AllocUnits()
279 return RemoveNode(p, indx); in AllocUnits()
281 if (numBytes <= (UInt32)(p->HiUnit - p->LoUnit)) in AllocUnits()
283 void *retVal = p->LoUnit; in AllocUnits()
284 p->LoUnit += numBytes; in AllocUnits()
287 return AllocUnitsRare(p, indx); in AllocUnits()
296 } while(--n); \
299 static void *ShrinkUnits(CPpmd7 *p, void *oldPtr, unsigned oldNU, unsigned newNU) in ShrinkUnits() argument
305 if (p->FreeList[i1] != 0) in ShrinkUnits()
307 void *ptr = RemoveNode(p, i1); in ShrinkUnits()
309 InsertNode(p, oldPtr, i0); in ShrinkUnits()
312 SplitBlock(p, oldPtr, i0, i1); in ShrinkUnits()
316 #define SUCCESSOR(p) ((CPpmd_Void_Ref)((p)->SuccessorLow | ((UInt32)(p)->SuccessorHigh << 16))) argument
318 static void SetSuccessor(CPpmd_State *p, CPpmd_Void_Ref v) in SetSuccessor() argument
320 (p)->SuccessorLow = (UInt16)((UInt32)(v) & 0xFFFF); in SetSuccessor()
321 (p)->SuccessorHigh = (UInt16)(((UInt32)(v) >> 16) & 0xFFFF); in SetSuccessor()
324 static void RestartModel(CPpmd7 *p) in RestartModel() argument
328 memset(p->FreeList, 0, sizeof(p->FreeList)); in RestartModel()
329 p->Text = p->Base + p->AlignOffset; in RestartModel()
330 p->HiUnit = p->Text + p->Size; in RestartModel()
331 p->LoUnit = p->UnitsStart = p->HiUnit - p->Size / 8 / UNIT_SIZE * 7 * UNIT_SIZE; in RestartModel()
332 p->GlueCount = 0; in RestartModel()
334 p->OrderFall = p->MaxOrder; in RestartModel()
335 p->RunLength = p->InitRL = -(Int32)((p->MaxOrder < 12) ? p->MaxOrder : 12) - 1; in RestartModel()
336 p->PrevSuccess = 0; in RestartModel()
338 p->MinContext = p->MaxContext = (CTX_PTR)(p->HiUnit -= UNIT_SIZE); /* AllocContext(p); */ in RestartModel()
339 p->MinContext->Suffix = 0; in RestartModel()
340 p->MinContext->NumStats = 256; in RestartModel()
341 p->MinContext->SummFreq = 256 + 1; in RestartModel()
342 p->FoundState = (CPpmd_State *)p->LoUnit; /* AllocUnits(p, PPMD_NUM_INDEXES - 1); */ in RestartModel()
343 p->LoUnit += U2B(256 / 2); in RestartModel()
344 p->MinContext->Stats = REF(p->FoundState); in RestartModel()
347 CPpmd_State *s = &p->FoundState[i]; in RestartModel()
348 s->Symbol = (Byte)i; in RestartModel()
349 s->Freq = 1; in RestartModel()
356 UInt16 *dest = p->BinSumm[i] + k; in RestartModel()
357 UInt16 val = (UInt16)(PPMD_BIN_SCALE - kInitBinEsc[k] / (i + 2)); in RestartModel()
365 CPpmd_See *s = &p->See[i][k]; in RestartModel()
366 s->Summ = (UInt16)((5 * i + 10) << (s->Shift = PPMD_PERIOD_BITS - 4)); in RestartModel()
367 s->Count = 4; in RestartModel()
371 static void Ppmd7_Init(CPpmd7 *p, unsigned maxOrder) in Ppmd7_Init() argument
373 p->MaxOrder = maxOrder; in Ppmd7_Init()
374 RestartModel(p); in Ppmd7_Init()
375 p->DummySee.Shift = PPMD_PERIOD_BITS; in Ppmd7_Init()
376 p->DummySee.Summ = 0; /* unused */ in Ppmd7_Init()
377 p->DummySee.Count = 64; /* unused */ in Ppmd7_Init()
380 static CTX_PTR CreateSuccessors(CPpmd7 *p, Bool skip) in CreateSuccessors() argument
383 CTX_PTR c = p->MinContext; in CreateSuccessors()
384 CPpmd_Byte_Ref upBranch = (CPpmd_Byte_Ref)SUCCESSOR(p->FoundState); in CreateSuccessors()
389 ps[numPs++] = p->FoundState; in CreateSuccessors()
391 while (c->Suffix) in CreateSuccessors()
396 if (c->NumStats != 1) in CreateSuccessors()
398 for (s = STATS(c); s->Symbol != p->FoundState->Symbol; s++); in CreateSuccessors()
413 upState.Symbol = *(const Byte *)Ppmd7_GetPtr(p, upBranch); in CreateSuccessors()
416 if (c->NumStats == 1) in CreateSuccessors()
417 upState.Freq = ONE_STATE(c)->Freq; in CreateSuccessors()
422 for (s = STATS(c); s->Symbol != upState.Symbol; s++); in CreateSuccessors()
423 cf = s->Freq - 1; in CreateSuccessors()
424 s0 = c->SummFreq - c->NumStats - cf; in CreateSuccessors()
425 … upState.Freq = (Byte)(1 + ((2 * cf <= s0) ? (5 * cf > s0) : ((2 * cf + 3 * s0 - 1) / (2 * s0)))); in CreateSuccessors()
431 CTX_PTR c1; /* = AllocContext(p); */ in CreateSuccessors()
432 if (p->HiUnit != p->LoUnit) in CreateSuccessors()
433 c1 = (CTX_PTR)(p->HiUnit -= UNIT_SIZE); in CreateSuccessors()
434 else if (p->FreeList[0] != 0) in CreateSuccessors()
435 c1 = (CTX_PTR)RemoveNode(p, 0); in CreateSuccessors()
438 c1 = (CTX_PTR)AllocUnitsRare(p, 0); in CreateSuccessors()
442 c1->NumStats = 1; in CreateSuccessors()
444 c1->Suffix = REF(c); in CreateSuccessors()
445 SetSuccessor(ps[--numPs], REF(c1)); in CreateSuccessors()
459 static void UpdateModel(CPpmd7 *p) in UpdateModel() argument
461 CPpmd_Void_Ref successor, fSuccessor = SUCCESSOR(p->FoundState); in UpdateModel()
465 if (p->FoundState->Freq < MAX_FREQ / 4 && p->MinContext->Suffix != 0) in UpdateModel()
467 c = SUFFIX(p->MinContext); in UpdateModel()
469 if (c->NumStats == 1) in UpdateModel()
472 if (s->Freq < 32) in UpdateModel()
473 s->Freq++; in UpdateModel()
478 if (s->Symbol != p->FoundState->Symbol) in UpdateModel()
480 do { s++; } while (s->Symbol != p->FoundState->Symbol); in UpdateModel()
481 if (s[0].Freq >= s[-1].Freq) in UpdateModel()
483 SwapStates(&s[0], &s[-1]); in UpdateModel()
484 s--; in UpdateModel()
487 if (s->Freq < MAX_FREQ - 9) in UpdateModel()
489 s->Freq += 2; in UpdateModel()
490 c->SummFreq += 2; in UpdateModel()
495 if (p->OrderFall == 0) in UpdateModel()
497 p->MinContext = p->MaxContext = CreateSuccessors(p, True); in UpdateModel()
498 if (p->MinContext == 0) in UpdateModel()
500 RestartModel(p); in UpdateModel()
503 SetSuccessor(p->FoundState, REF(p->MinContext)); in UpdateModel()
507 *p->Text++ = p->FoundState->Symbol; in UpdateModel()
508 successor = REF(p->Text); in UpdateModel()
509 if (p->Text >= p->UnitsStart) in UpdateModel()
511 RestartModel(p); in UpdateModel()
519 CTX_PTR cs = CreateSuccessors(p, False); in UpdateModel()
522 RestartModel(p); in UpdateModel()
527 if (--p->OrderFall == 0) in UpdateModel()
530 p->Text -= (p->MaxContext != p->MinContext); in UpdateModel()
535 SetSuccessor(p->FoundState, successor); in UpdateModel()
536 fSuccessor = REF(p->MinContext); in UpdateModel()
539 s0 = p->MinContext->SummFreq - (ns = p->MinContext->NumStats) - (p->FoundState->Freq - 1); in UpdateModel()
541 for (c = p->MaxContext; c != p->MinContext; c = SUFFIX(c)) in UpdateModel()
545 if ((ns1 = c->NumStats) != 1) in UpdateModel()
554 void *ptr = AllocUnits(p, i + 1); in UpdateModel()
558 RestartModel(p); in UpdateModel()
563 InsertNode(p, oldPtr, i); in UpdateModel()
564 c->Stats = STATS_REF(ptr); in UpdateModel()
567 …c->SummFreq = (UInt16)(c->SummFreq + (2 * ns1 < ns) + 2 * ((4 * ns1 <= ns) & (c->SummFreq <= 8 * n… in UpdateModel()
571 CPpmd_State *s = (CPpmd_State*)AllocUnits(p, 0); in UpdateModel()
574 RestartModel(p); in UpdateModel()
578 c->Stats = REF(s); in UpdateModel()
579 if (s->Freq < MAX_FREQ / 4 - 1) in UpdateModel()
580 s->Freq <<= 1; in UpdateModel()
582 s->Freq = MAX_FREQ - 4; in UpdateModel()
583 c->SummFreq = (UInt16)(s->Freq + p->InitEsc + (ns > 3)); in UpdateModel()
585 cf = 2 * (UInt32)p->FoundState->Freq * (c->SummFreq + 6); in UpdateModel()
586 sf = (UInt32)s0 + c->SummFreq; in UpdateModel()
590 c->SummFreq += 3; in UpdateModel()
595 c->SummFreq = (UInt16)(c->SummFreq + cf); in UpdateModel()
600 s->Symbol = p->FoundState->Symbol; in UpdateModel()
601 s->Freq = (Byte)cf; in UpdateModel()
602 c->NumStats = (UInt16)(ns1 + 1); in UpdateModel()
605 p->MaxContext = p->MinContext = CTX(fSuccessor); in UpdateModel()
608 static void Rescale(CPpmd7 *p) in Rescale() argument
611 CPpmd_State *stats = STATS(p->MinContext); in Rescale()
612 CPpmd_State *s = p->FoundState; in Rescale()
615 for (; s != stats; s--) in Rescale()
616 s[0] = s[-1]; in Rescale()
619 escFreq = p->MinContext->SummFreq - s->Freq; in Rescale()
620 s->Freq += 4; in Rescale()
621 adder = (p->OrderFall != 0); in Rescale()
622 s->Freq = (Byte)((s->Freq + adder) >> 1); in Rescale()
623 sumFreq = s->Freq; in Rescale()
625 i = p->MinContext->NumStats - 1; in Rescale()
628 escFreq -= (++s)->Freq; in Rescale()
629 s->Freq = (Byte)((s->Freq + adder) >> 1); in Rescale()
630 sumFreq += s->Freq; in Rescale()
631 if (s[0].Freq > s[-1].Freq) in Rescale()
636 s1[0] = s1[-1]; in Rescale()
637 while (--s1 != stats && tmp.Freq > s1[-1].Freq); in Rescale()
641 while (--i); in Rescale()
643 if (s->Freq == 0) in Rescale()
645 unsigned numStats = p->MinContext->NumStats; in Rescale()
647 do { i++; } while ((--s)->Freq == 0); in Rescale()
649 p->MinContext->NumStats = (UInt16)(p->MinContext->NumStats - i); in Rescale()
650 if (p->MinContext->NumStats == 1) in Rescale()
655 tmp.Freq = (Byte)(tmp.Freq - (tmp.Freq >> 1)); in Rescale()
659 InsertNode(p, stats, U2I(((numStats + 1) >> 1))); in Rescale()
660 *(p->FoundState = ONE_STATE(p->MinContext)) = tmp; in Rescale()
664 n1 = (p->MinContext->NumStats + 1) >> 1; in Rescale()
666 p->MinContext->Stats = STATS_REF(ShrinkUnits(p, stats, n0, n1)); in Rescale()
668 p->MinContext->SummFreq = (UInt16)(sumFreq + escFreq - (escFreq >> 1)); in Rescale()
669 p->FoundState = STATS(p->MinContext); in Rescale()
672 static CPpmd_See *Ppmd7_MakeEscFreq(CPpmd7 *p, unsigned numMasked, UInt32 *escFreq) in Ppmd7_MakeEscFreq() argument
675 unsigned nonMasked = p->MinContext->NumStats - numMasked; in Ppmd7_MakeEscFreq()
676 if (p->MinContext->NumStats != 256) in Ppmd7_MakeEscFreq()
678 see = p->See[p->NS2Indx[nonMasked - 1]] + in Ppmd7_MakeEscFreq()
679 (nonMasked < (unsigned)SUFFIX(p->MinContext)->NumStats - p->MinContext->NumStats) + in Ppmd7_MakeEscFreq()
680 2 * (p->MinContext->SummFreq < 11 * p->MinContext->NumStats) + in Ppmd7_MakeEscFreq()
682 p->HiBitsFlag; in Ppmd7_MakeEscFreq()
684 unsigned r = (see->Summ >> see->Shift); in Ppmd7_MakeEscFreq()
685 see->Summ = (UInt16)(see->Summ - r); in Ppmd7_MakeEscFreq()
691 see = &p->DummySee; in Ppmd7_MakeEscFreq()
697 static void NextContext(CPpmd7 *p) in NextContext() argument
699 CTX_PTR c = CTX(SUCCESSOR(p->FoundState)); in NextContext()
700 if (p->OrderFall == 0 && (Byte *)c > p->Text) in NextContext()
701 p->MinContext = p->MaxContext = c; in NextContext()
703 UpdateModel(p); in NextContext()
706 static void Ppmd7_Update1(CPpmd7 *p) in Ppmd7_Update1() argument
708 CPpmd_State *s = p->FoundState; in Ppmd7_Update1()
709 s->Freq += 4; in Ppmd7_Update1()
710 p->MinContext->SummFreq += 4; in Ppmd7_Update1()
711 if (s[0].Freq > s[-1].Freq) in Ppmd7_Update1()
713 SwapStates(&s[0], &s[-1]); in Ppmd7_Update1()
714 p->FoundState = --s; in Ppmd7_Update1()
715 if (s->Freq > MAX_FREQ) in Ppmd7_Update1()
716 Rescale(p); in Ppmd7_Update1()
718 NextContext(p); in Ppmd7_Update1()
721 static void Ppmd7_Update1_0(CPpmd7 *p) in Ppmd7_Update1_0() argument
723 p->PrevSuccess = (2 * p->FoundState->Freq > p->MinContext->SummFreq); in Ppmd7_Update1_0()
724 p->RunLength += p->PrevSuccess; in Ppmd7_Update1_0()
725 p->MinContext->SummFreq += 4; in Ppmd7_Update1_0()
726 if ((p->FoundState->Freq += 4) > MAX_FREQ) in Ppmd7_Update1_0()
727 Rescale(p); in Ppmd7_Update1_0()
728 NextContext(p); in Ppmd7_Update1_0()
731 static void Ppmd7_UpdateBin(CPpmd7 *p) in Ppmd7_UpdateBin() argument
733 p->FoundState->Freq = (Byte)(p->FoundState->Freq + (p->FoundState->Freq < 128 ? 1: 0)); in Ppmd7_UpdateBin()
734 p->PrevSuccess = 1; in Ppmd7_UpdateBin()
735 p->RunLength++; in Ppmd7_UpdateBin()
736 NextContext(p); in Ppmd7_UpdateBin()
739 static void Ppmd7_Update2(CPpmd7 *p) in Ppmd7_Update2() argument
741 p->MinContext->SummFreq += 4; in Ppmd7_Update2()
742 if ((p->FoundState->Freq += 4) > MAX_FREQ) in Ppmd7_Update2()
743 Rescale(p); in Ppmd7_Update2()
744 p->RunLength = p->InitRL; in Ppmd7_Update2()
745 UpdateModel(p); in Ppmd7_Update2()
748 /* ---------- Decode ---------- */
750 static Bool Ppmd_RangeDec_Init(CPpmd7z_RangeDec *p) in Ppmd_RangeDec_Init() argument
753 p->Low = p->Bottom = 0; in Ppmd_RangeDec_Init()
754 p->Range = 0xFFFFFFFF; in Ppmd_RangeDec_Init()
756 p->Code = (p->Code << 8) | p->Stream->Read((void *)p->Stream); in Ppmd_RangeDec_Init()
757 return (p->Code < 0xFFFFFFFF); in Ppmd_RangeDec_Init()
760 static Bool Ppmd7z_RangeDec_Init(CPpmd7z_RangeDec *p) in Ppmd7z_RangeDec_Init() argument
762 if (p->Stream->Read((void *)p->Stream) != 0) in Ppmd7z_RangeDec_Init()
764 return Ppmd_RangeDec_Init(p); in Ppmd7z_RangeDec_Init()
767 static Bool PpmdRAR_RangeDec_Init(CPpmd7z_RangeDec *p) in PpmdRAR_RangeDec_Init() argument
769 if (!Ppmd_RangeDec_Init(p)) in PpmdRAR_RangeDec_Init()
771 p->Bottom = 0x8000; in PpmdRAR_RangeDec_Init()
777 CPpmd7z_RangeDec *p = (CPpmd7z_RangeDec *)pp; in Range_GetThreshold() local
778 return (p->Code - p->Low) / (p->Range /= total); in Range_GetThreshold()
781 static void Range_Normalize(CPpmd7z_RangeDec *p) in Range_Normalize() argument
785 if((p->Low ^ (p->Low + p->Range)) >= kTopValue) in Range_Normalize()
787 if(p->Range >= p->Bottom) in Range_Normalize()
790 p->Range = ((uint32_t)(-(int32_t)p->Low)) & (p->Bottom - 1); in Range_Normalize()
792 p->Code = (p->Code << 8) | p->Stream->Read((void *)p->Stream); in Range_Normalize()
793 p->Range <<= 8; in Range_Normalize()
794 p->Low <<= 8; in Range_Normalize()
800 CPpmd7z_RangeDec *p = (CPpmd7z_RangeDec *)pp; in Range_Decode_7z() local
801 p->Code -= start * p->Range; in Range_Decode_7z()
802 p->Range *= size; in Range_Decode_7z()
803 Range_Normalize(p); in Range_Decode_7z()
808 CPpmd7z_RangeDec *p = (CPpmd7z_RangeDec *)pp; in Range_Decode_RAR() local
809 p->Low += start * p->Range; in Range_Decode_RAR()
810 p->Range *= size; in Range_Decode_RAR()
811 Range_Normalize(p); in Range_Decode_RAR()
816 CPpmd7z_RangeDec *p = (CPpmd7z_RangeDec *)pp; in Range_DecodeBit_7z() local
817 UInt32 newBound = (p->Range >> 14) * size0; in Range_DecodeBit_7z()
819 if (p->Code < newBound) in Range_DecodeBit_7z()
822 p->Range = newBound; in Range_DecodeBit_7z()
827 p->Code -= newBound; in Range_DecodeBit_7z()
828 p->Range -= newBound; in Range_DecodeBit_7z()
830 Range_Normalize(p); in Range_DecodeBit_7z()
836 CPpmd7z_RangeDec *p = (CPpmd7z_RangeDec *)pp; in Range_DecodeBit_RAR() local
837 UInt32 bit, value = p->p.GetThreshold(p, PPMD_BIN_SCALE); in Range_DecodeBit_RAR()
841 p->p.Decode(p, 0, size0); in Range_DecodeBit_RAR()
846 p->p.Decode(p, size0, PPMD_BIN_SCALE - size0); in Range_DecodeBit_RAR()
851 static void Ppmd7z_RangeDec_CreateVTable(CPpmd7z_RangeDec *p) in Ppmd7z_RangeDec_CreateVTable() argument
853 p->p.GetThreshold = Range_GetThreshold; in Ppmd7z_RangeDec_CreateVTable()
854 p->p.Decode = Range_Decode_7z; in Ppmd7z_RangeDec_CreateVTable()
855 p->p.DecodeBit = Range_DecodeBit_7z; in Ppmd7z_RangeDec_CreateVTable()
858 static void PpmdRAR_RangeDec_CreateVTable(CPpmd7z_RangeDec *p) in PpmdRAR_RangeDec_CreateVTable() argument
860 p->p.GetThreshold = Range_GetThreshold; in PpmdRAR_RangeDec_CreateVTable()
861 p->p.Decode = Range_Decode_RAR; in PpmdRAR_RangeDec_CreateVTable()
862 p->p.DecodeBit = Range_DecodeBit_RAR; in PpmdRAR_RangeDec_CreateVTable()
867 static int Ppmd7_DecodeSymbol(CPpmd7 *p, IPpmd7_RangeDec *rc) in Ppmd7_DecodeSymbol() argument
870 if (p->MinContext->NumStats != 1) in Ppmd7_DecodeSymbol()
872 CPpmd_State *s = Ppmd7_GetStats(p, p->MinContext); in Ppmd7_DecodeSymbol()
875 if ((count = rc->GetThreshold(rc, p->MinContext->SummFreq)) < (hiCnt = s->Freq)) in Ppmd7_DecodeSymbol()
878 rc->Decode(rc, 0, s->Freq); in Ppmd7_DecodeSymbol()
879 p->FoundState = s; in Ppmd7_DecodeSymbol()
880 symbol = s->Symbol; in Ppmd7_DecodeSymbol()
881 Ppmd7_Update1_0(p); in Ppmd7_DecodeSymbol()
884 p->PrevSuccess = 0; in Ppmd7_DecodeSymbol()
885 i = p->MinContext->NumStats - 1; in Ppmd7_DecodeSymbol()
888 if ((hiCnt += (++s)->Freq) > count) in Ppmd7_DecodeSymbol()
891 rc->Decode(rc, hiCnt - s->Freq, s->Freq); in Ppmd7_DecodeSymbol()
892 p->FoundState = s; in Ppmd7_DecodeSymbol()
893 symbol = s->Symbol; in Ppmd7_DecodeSymbol()
894 Ppmd7_Update1(p); in Ppmd7_DecodeSymbol()
898 while (--i); in Ppmd7_DecodeSymbol()
899 if (count >= p->MinContext->SummFreq) in Ppmd7_DecodeSymbol()
900 return -2; in Ppmd7_DecodeSymbol()
901 p->HiBitsFlag = p->HB2Flag[p->FoundState->Symbol]; in Ppmd7_DecodeSymbol()
902 rc->Decode(rc, hiCnt, p->MinContext->SummFreq - hiCnt); in Ppmd7_DecodeSymbol()
904 MASK(s->Symbol) = 0; in Ppmd7_DecodeSymbol()
905 i = p->MinContext->NumStats - 1; in Ppmd7_DecodeSymbol()
906 do { MASK((--s)->Symbol) = 0; } while (--i); in Ppmd7_DecodeSymbol()
910 UInt16 *prob = Ppmd7_GetBinSumm(p); in Ppmd7_DecodeSymbol()
911 if (rc->DecodeBit(rc, *prob) == 0) in Ppmd7_DecodeSymbol()
915 symbol = (p->FoundState = Ppmd7Context_OneState(p->MinContext))->Symbol; in Ppmd7_DecodeSymbol()
916 Ppmd7_UpdateBin(p); in Ppmd7_DecodeSymbol()
920 p->InitEsc = PPMD7_kExpEscape[*prob >> 10]; in Ppmd7_DecodeSymbol()
922 MASK(Ppmd7Context_OneState(p->MinContext)->Symbol) = 0; in Ppmd7_DecodeSymbol()
923 p->PrevSuccess = 0; in Ppmd7_DecodeSymbol()
930 unsigned i, num, numMasked = p->MinContext->NumStats; in Ppmd7_DecodeSymbol()
933 p->OrderFall++; in Ppmd7_DecodeSymbol()
934 if (!p->MinContext->Suffix) in Ppmd7_DecodeSymbol()
935 return -1; in Ppmd7_DecodeSymbol()
936 p->MinContext = Ppmd7_GetContext(p, p->MinContext->Suffix); in Ppmd7_DecodeSymbol()
938 while (p->MinContext->NumStats == numMasked); in Ppmd7_DecodeSymbol()
940 s = Ppmd7_GetStats(p, p->MinContext); in Ppmd7_DecodeSymbol()
942 num = p->MinContext->NumStats - numMasked; in Ppmd7_DecodeSymbol()
945 int k = (int)(MASK(s->Symbol)); in Ppmd7_DecodeSymbol()
946 hiCnt += (s->Freq & k); in Ppmd7_DecodeSymbol()
948 i -= k; in Ppmd7_DecodeSymbol()
952 see = Ppmd7_MakeEscFreq(p, numMasked, &freqSum); in Ppmd7_DecodeSymbol()
954 count = rc->GetThreshold(rc, freqSum); in Ppmd7_DecodeSymbol()
960 for (hiCnt = 0; (hiCnt += (*pps)->Freq) <= count; pps++); in Ppmd7_DecodeSymbol()
962 rc->Decode(rc, hiCnt - s->Freq, s->Freq); in Ppmd7_DecodeSymbol()
964 p->FoundState = s; in Ppmd7_DecodeSymbol()
965 symbol = s->Symbol; in Ppmd7_DecodeSymbol()
966 Ppmd7_Update2(p); in Ppmd7_DecodeSymbol()
970 return -2; in Ppmd7_DecodeSymbol()
971 rc->Decode(rc, hiCnt, freqSum - hiCnt); in Ppmd7_DecodeSymbol()
972 see->Summ = (UInt16)(see->Summ + freqSum); in Ppmd7_DecodeSymbol()
973 do { MASK(ps[--i]->Symbol) = 0; } while (i != 0); in Ppmd7_DecodeSymbol()
977 /* ---------- Encode ---------- Ppmd7Enc.c */
981 static void Ppmd7z_RangeEnc_Init(CPpmd7z_RangeEnc *p) in Ppmd7z_RangeEnc_Init() argument
983 p->Low = 0; in Ppmd7z_RangeEnc_Init()
984 p->Range = 0xFFFFFFFF; in Ppmd7z_RangeEnc_Init()
985 p->Cache = 0; in Ppmd7z_RangeEnc_Init()
986 p->CacheSize = 1; in Ppmd7z_RangeEnc_Init()
989 static void RangeEnc_ShiftLow(CPpmd7z_RangeEnc *p) in RangeEnc_ShiftLow() argument
991 if ((UInt32)p->Low < (UInt32)0xFF000000 || (unsigned)(p->Low >> 32) != 0) in RangeEnc_ShiftLow()
993 Byte temp = p->Cache; in RangeEnc_ShiftLow()
996 p->Stream->Write(p->Stream, (Byte)(temp + (Byte)(p->Low >> 32))); in RangeEnc_ShiftLow()
999 while(--p->CacheSize != 0); in RangeEnc_ShiftLow()
1000 p->Cache = (Byte)((UInt32)p->Low >> 24); in RangeEnc_ShiftLow()
1002 p->CacheSize++; in RangeEnc_ShiftLow()
1003 p->Low = ((UInt32)p->Low << 8) & 0xFFFFFFFF; in RangeEnc_ShiftLow()
1006 static void RangeEnc_Encode(CPpmd7z_RangeEnc *p, UInt32 start, UInt32 size, UInt32 total) in RangeEnc_Encode() argument
1008 p->Low += (UInt64)start * (UInt64)(p->Range /= total); in RangeEnc_Encode()
1009 p->Range *= size; in RangeEnc_Encode()
1010 while (p->Range < kTopValue) in RangeEnc_Encode()
1012 p->Range <<= 8; in RangeEnc_Encode()
1013 RangeEnc_ShiftLow(p); in RangeEnc_Encode()
1017 static void RangeEnc_EncodeBit_0(CPpmd7z_RangeEnc *p, UInt32 size0) in RangeEnc_EncodeBit_0() argument
1019 p->Range = (p->Range >> 14) * size0; in RangeEnc_EncodeBit_0()
1020 while (p->Range < kTopValue) in RangeEnc_EncodeBit_0()
1022 p->Range <<= 8; in RangeEnc_EncodeBit_0()
1023 RangeEnc_ShiftLow(p); in RangeEnc_EncodeBit_0()
1027 static void RangeEnc_EncodeBit_1(CPpmd7z_RangeEnc *p, UInt32 size0) in RangeEnc_EncodeBit_1() argument
1029 UInt32 newBound = (p->Range >> 14) * size0; in RangeEnc_EncodeBit_1()
1030 p->Low += newBound; in RangeEnc_EncodeBit_1()
1031 p->Range -= newBound; in RangeEnc_EncodeBit_1()
1032 while (p->Range < kTopValue) in RangeEnc_EncodeBit_1()
1034 p->Range <<= 8; in RangeEnc_EncodeBit_1()
1035 RangeEnc_ShiftLow(p); in RangeEnc_EncodeBit_1()
1039 static void Ppmd7z_RangeEnc_FlushData(CPpmd7z_RangeEnc *p) in Ppmd7z_RangeEnc_FlushData() argument
1043 RangeEnc_ShiftLow(p); in Ppmd7z_RangeEnc_FlushData()
1049 static void Ppmd7_EncodeSymbol(CPpmd7 *p, CPpmd7z_RangeEnc *rc, int symbol) in Ppmd7_EncodeSymbol() argument
1052 if (p->MinContext->NumStats != 1) in Ppmd7_EncodeSymbol()
1054 CPpmd_State *s = Ppmd7_GetStats(p, p->MinContext); in Ppmd7_EncodeSymbol()
1057 if (s->Symbol == symbol) in Ppmd7_EncodeSymbol()
1059 RangeEnc_Encode(rc, 0, s->Freq, p->MinContext->SummFreq); in Ppmd7_EncodeSymbol()
1060 p->FoundState = s; in Ppmd7_EncodeSymbol()
1061 Ppmd7_Update1_0(p); in Ppmd7_EncodeSymbol()
1064 p->PrevSuccess = 0; in Ppmd7_EncodeSymbol()
1065 sum = s->Freq; in Ppmd7_EncodeSymbol()
1066 i = p->MinContext->NumStats - 1; in Ppmd7_EncodeSymbol()
1069 if ((++s)->Symbol == symbol) in Ppmd7_EncodeSymbol()
1071 RangeEnc_Encode(rc, sum, s->Freq, p->MinContext->SummFreq); in Ppmd7_EncodeSymbol()
1072 p->FoundState = s; in Ppmd7_EncodeSymbol()
1073 Ppmd7_Update1(p); in Ppmd7_EncodeSymbol()
1076 sum += s->Freq; in Ppmd7_EncodeSymbol()
1078 while (--i); in Ppmd7_EncodeSymbol()
1080 p->HiBitsFlag = p->HB2Flag[p->FoundState->Symbol]; in Ppmd7_EncodeSymbol()
1082 MASK(s->Symbol) = 0; in Ppmd7_EncodeSymbol()
1083 i = p->MinContext->NumStats - 1; in Ppmd7_EncodeSymbol()
1084 do { MASK((--s)->Symbol) = 0; } while (--i); in Ppmd7_EncodeSymbol()
1085 RangeEnc_Encode(rc, sum, p->MinContext->SummFreq - sum, p->MinContext->SummFreq); in Ppmd7_EncodeSymbol()
1089 UInt16 *prob = Ppmd7_GetBinSumm(p); in Ppmd7_EncodeSymbol()
1090 CPpmd_State *s = Ppmd7Context_OneState(p->MinContext); in Ppmd7_EncodeSymbol()
1091 if (s->Symbol == symbol) in Ppmd7_EncodeSymbol()
1095 p->FoundState = s; in Ppmd7_EncodeSymbol()
1096 Ppmd7_UpdateBin(p); in Ppmd7_EncodeSymbol()
1103 p->InitEsc = PPMD7_kExpEscape[*prob >> 10]; in Ppmd7_EncodeSymbol()
1105 MASK(s->Symbol) = 0; in Ppmd7_EncodeSymbol()
1106 p->PrevSuccess = 0; in Ppmd7_EncodeSymbol()
1115 unsigned i, numMasked = p->MinContext->NumStats; in Ppmd7_EncodeSymbol()
1118 p->OrderFall++; in Ppmd7_EncodeSymbol()
1119 if (!p->MinContext->Suffix) in Ppmd7_EncodeSymbol()
1120 return; /* EndMarker (symbol = -1) */ in Ppmd7_EncodeSymbol()
1121 p->MinContext = Ppmd7_GetContext(p, p->MinContext->Suffix); in Ppmd7_EncodeSymbol()
1123 while (p->MinContext->NumStats == numMasked); in Ppmd7_EncodeSymbol()
1125 see = Ppmd7_MakeEscFreq(p, numMasked, &escFreq); in Ppmd7_EncodeSymbol()
1126 s = Ppmd7_GetStats(p, p->MinContext); in Ppmd7_EncodeSymbol()
1128 i = p->MinContext->NumStats; in Ppmd7_EncodeSymbol()
1131 int cur = s->Symbol; in Ppmd7_EncodeSymbol()
1138 sum += (s->Freq & (int)(MASK(s->Symbol))); in Ppmd7_EncodeSymbol()
1141 while (--i); in Ppmd7_EncodeSymbol()
1142 RangeEnc_Encode(rc, low, s1->Freq, sum + escFreq); in Ppmd7_EncodeSymbol()
1144 p->FoundState = s1; in Ppmd7_EncodeSymbol()
1145 Ppmd7_Update2(p); in Ppmd7_EncodeSymbol()
1148 sum += (s->Freq & (int)(MASK(cur))); in Ppmd7_EncodeSymbol()
1152 while (--i); in Ppmd7_EncodeSymbol()
1155 see->Summ = (UInt16)(see->Summ + sum + escFreq); in Ppmd7_EncodeSymbol()