1 /* Lzma2Enc.c -- LZMA2 Encoder
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2 2010-09-24 : Igor Pavlov : Public domain */
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4 /* #include <stdio.h> */
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7 /* #define _7ZIP_ST */
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9 #include "Lzma2Enc.h"
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12 #include "MtCoder.h"
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14 #define NUM_MT_CODER_THREADS_MAX 1
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17 #define LZMA2_CONTROL_LZMA (1 << 7)
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18 #define LZMA2_CONTROL_COPY_NO_RESET 2
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19 #define LZMA2_CONTROL_COPY_RESET_DIC 1
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20 #define LZMA2_CONTROL_EOF 0
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22 #define LZMA2_LCLP_MAX 4
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24 #define LZMA2_DIC_SIZE_FROM_PROP(p) (((UInt32)2 | ((p) & 1)) << ((p) / 2 + 11))
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26 #define LZMA2_PACK_SIZE_MAX (1 << 16)
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27 #define LZMA2_COPY_CHUNK_SIZE LZMA2_PACK_SIZE_MAX
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28 #define LZMA2_UNPACK_SIZE_MAX (1 << 21)
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29 #define LZMA2_KEEP_WINDOW_SIZE LZMA2_UNPACK_SIZE_MAX
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31 #define LZMA2_CHUNK_SIZE_COMPRESSED_MAX ((1 << 16) + 16)
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34 #define PRF(x) /* x */
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36 /* ---------- CLzma2EncInt ---------- */
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47 static SRes Lzma2EncInt_Init(CLzma2EncInt *p, const CLzma2EncProps *props)
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49 Byte propsEncoded[LZMA_PROPS_SIZE];
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50 SizeT propsSize = LZMA_PROPS_SIZE;
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51 RINOK(LzmaEnc_SetProps(p->enc, &props->lzmaProps));
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52 RINOK(LzmaEnc_WriteProperties(p->enc, propsEncoded, &propsSize));
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54 p->props = propsEncoded[0];
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55 p->needInitState = True;
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56 p->needInitProp = True;
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60 SRes LzmaEnc_PrepareForLzma2(CLzmaEncHandle pp, ISeqInStream *inStream, UInt32 keepWindowSize,
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61 ISzAlloc *alloc, ISzAlloc *allocBig);
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62 SRes LzmaEnc_MemPrepare(CLzmaEncHandle pp, const Byte *src, SizeT srcLen,
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63 UInt32 keepWindowSize, ISzAlloc *alloc, ISzAlloc *allocBig);
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64 SRes LzmaEnc_CodeOneMemBlock(CLzmaEncHandle pp, Bool reInit,
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65 Byte *dest, size_t *destLen, UInt32 desiredPackSize, UInt32 *unpackSize);
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66 const Byte *LzmaEnc_GetCurBuf(CLzmaEncHandle pp);
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67 void LzmaEnc_Finish(CLzmaEncHandle pp);
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68 void LzmaEnc_SaveState(CLzmaEncHandle pp);
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69 void LzmaEnc_RestoreState(CLzmaEncHandle pp);
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72 static SRes Lzma2EncInt_EncodeSubblock(CLzma2EncInt *p, Byte *outBuf,
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73 size_t *packSizeRes, ISeqOutStream *outStream)
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75 size_t packSizeLimit = *packSizeRes;
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76 size_t packSize = packSizeLimit;
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77 UInt32 unpackSize = LZMA2_UNPACK_SIZE_MAX;
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78 unsigned lzHeaderSize = 5 + (p->needInitProp ? 1 : 0);
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83 if (packSize < lzHeaderSize)
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84 return SZ_ERROR_OUTPUT_EOF;
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85 packSize -= lzHeaderSize;
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87 LzmaEnc_SaveState(p->enc);
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88 res = LzmaEnc_CodeOneMemBlock(p->enc, p->needInitState,
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89 outBuf + lzHeaderSize, &packSize, LZMA2_PACK_SIZE_MAX, &unpackSize);
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91 PRF(printf("\npackSize = %7d unpackSize = %7d ", packSize, unpackSize));
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93 if (unpackSize == 0)
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97 useCopyBlock = (packSize + 2 >= unpackSize || packSize > (1 << 16));
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100 if (res != SZ_ERROR_OUTPUT_EOF)
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103 useCopyBlock = True;
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108 size_t destPos = 0;
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109 PRF(printf("################# COPY "));
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110 while (unpackSize > 0)
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112 UInt32 u = (unpackSize < LZMA2_COPY_CHUNK_SIZE) ? unpackSize : LZMA2_COPY_CHUNK_SIZE;
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113 if (packSizeLimit - destPos < u + 3)
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114 return SZ_ERROR_OUTPUT_EOF;
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115 outBuf[destPos++] = (Byte)(p->srcPos == 0 ? LZMA2_CONTROL_COPY_RESET_DIC : LZMA2_CONTROL_COPY_NO_RESET);
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116 outBuf[destPos++] = (Byte)((u - 1) >> 8);
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117 outBuf[destPos++] = (Byte)(u - 1);
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118 memcpy(outBuf + destPos, LzmaEnc_GetCurBuf(p->enc) - unpackSize, u);
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124 *packSizeRes += destPos;
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125 if (outStream->Write(outStream, outBuf, destPos) != destPos)
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126 return SZ_ERROR_WRITE;
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130 *packSizeRes = destPos;
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131 /* needInitState = True; */
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133 LzmaEnc_RestoreState(p->enc);
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137 size_t destPos = 0;
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138 UInt32 u = unpackSize - 1;
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139 UInt32 pm = (UInt32)(packSize - 1);
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140 unsigned mode = (p->srcPos == 0) ? 3 : (p->needInitState ? (p->needInitProp ? 2 : 1) : 0);
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144 outBuf[destPos++] = (Byte)(LZMA2_CONTROL_LZMA | (mode << 5) | ((u >> 16) & 0x1F));
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145 outBuf[destPos++] = (Byte)(u >> 8);
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146 outBuf[destPos++] = (Byte)u;
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147 outBuf[destPos++] = (Byte)(pm >> 8);
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148 outBuf[destPos++] = (Byte)pm;
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150 if (p->needInitProp)
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151 outBuf[destPos++] = p->props;
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153 p->needInitProp = False;
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154 p->needInitState = False;
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155 destPos += packSize;
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156 p->srcPos += unpackSize;
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159 if (outStream->Write(outStream, outBuf, destPos) != destPos)
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160 return SZ_ERROR_WRITE;
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161 *packSizeRes = destPos;
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166 /* ---------- Lzma2 Props ---------- */
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168 void Lzma2EncProps_Init(CLzma2EncProps *p)
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170 LzmaEncProps_Init(&p->lzmaProps);
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171 p->numTotalThreads = -1;
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172 p->numBlockThreads = -1;
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176 void Lzma2EncProps_Normalize(CLzma2EncProps *p)
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178 int t1, t1n, t2, t3;
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180 CLzmaEncProps lzmaProps = p->lzmaProps;
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181 LzmaEncProps_Normalize(&lzmaProps);
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182 t1n = lzmaProps.numThreads;
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185 t1 = p->lzmaProps.numThreads;
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186 t2 = p->numBlockThreads;
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187 t3 = p->numTotalThreads;
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189 if (t2 > NUM_MT_CODER_THREADS_MAX)
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190 t2 = NUM_MT_CODER_THREADS_MAX;
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206 if (t2 > NUM_MT_CODER_THREADS_MAX)
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207 t2 = NUM_MT_CODER_THREADS_MAX;
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218 p->lzmaProps.numThreads = t1;
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219 p->numBlockThreads = t2;
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220 p->numTotalThreads = t3;
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221 LzmaEncProps_Normalize(&p->lzmaProps);
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223 if (p->blockSize == 0)
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225 UInt32 dictSize = p->lzmaProps.dictSize;
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226 UInt64 blockSize = (UInt64)dictSize << 2;
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227 const UInt32 kMinSize = (UInt32)1 << 20;
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228 const UInt32 kMaxSize = (UInt32)1 << 28;
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229 if (blockSize < kMinSize) blockSize = kMinSize;
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230 if (blockSize > kMaxSize) blockSize = kMaxSize;
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231 if (blockSize < dictSize) blockSize = dictSize;
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232 p->blockSize = (size_t)blockSize;
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236 static SRes Progress(ICompressProgress *p, UInt64 inSize, UInt64 outSize)
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238 return (p && p->Progress(p, inSize, outSize) != SZ_OK) ? SZ_ERROR_PROGRESS : SZ_OK;
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241 /* ---------- Lzma2 ---------- */
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246 CLzma2EncProps props;
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251 ISzAlloc *allocBig;
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253 CLzma2EncInt coders[NUM_MT_CODER_THREADS_MAX];
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262 /* ---------- Lzma2EncThread ---------- */
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264 static SRes Lzma2Enc_EncodeMt1(CLzma2EncInt *p, CLzma2Enc *mainEncoder,
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265 ISeqOutStream *outStream, ISeqInStream *inStream, ICompressProgress *progress)
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267 UInt64 packTotal = 0;
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270 if (mainEncoder->outBuf == 0)
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272 mainEncoder->outBuf = (Byte *)IAlloc_Alloc(mainEncoder->alloc, LZMA2_CHUNK_SIZE_COMPRESSED_MAX);
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273 if (mainEncoder->outBuf == 0)
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274 return SZ_ERROR_MEM;
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276 RINOK(Lzma2EncInt_Init(p, &mainEncoder->props));
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277 RINOK(LzmaEnc_PrepareForLzma2(p->enc, inStream, LZMA2_KEEP_WINDOW_SIZE,
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278 mainEncoder->alloc, mainEncoder->allocBig));
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281 size_t packSize = LZMA2_CHUNK_SIZE_COMPRESSED_MAX;
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282 res = Lzma2EncInt_EncodeSubblock(p, mainEncoder->outBuf, &packSize, outStream);
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285 packTotal += packSize;
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286 res = Progress(progress, p->srcPos, packTotal);
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292 LzmaEnc_Finish(p->enc);
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296 if (outStream->Write(outStream, &b, 1) != 1)
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297 return SZ_ERROR_WRITE;
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306 IMtCoderCallback funcTable;
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307 CLzma2Enc *lzma2Enc;
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310 static SRes MtCallbackImp_Code(void *pp, unsigned index, Byte *dest, size_t *destSize,
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311 const Byte *src, size_t srcSize, int finished)
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313 CMtCallbackImp *imp = (CMtCallbackImp *)pp;
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314 CLzma2Enc *mainEncoder = imp->lzma2Enc;
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315 CLzma2EncInt *p = &mainEncoder->coders[index];
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319 size_t destLim = *destSize;
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324 RINOK(Lzma2EncInt_Init(p, &mainEncoder->props));
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326 RINOK(LzmaEnc_MemPrepare(p->enc, src, srcSize, LZMA2_KEEP_WINDOW_SIZE,
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327 mainEncoder->alloc, mainEncoder->allocBig));
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329 while (p->srcPos < srcSize)
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331 size_t packSize = destLim - *destSize;
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332 res = Lzma2EncInt_EncodeSubblock(p, dest + *destSize, &packSize, NULL);
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335 *destSize += packSize;
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339 res = SZ_ERROR_FAIL;
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343 if (MtProgress_Set(&mainEncoder->mtCoder.mtProgress, index, p->srcPos, *destSize) != SZ_OK)
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345 res = SZ_ERROR_PROGRESS;
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349 LzmaEnc_Finish(p->enc);
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355 if (*destSize == destLim)
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356 return SZ_ERROR_OUTPUT_EOF;
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357 dest[(*destSize)++] = 0;
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365 /* ---------- Lzma2Enc ---------- */
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367 CLzma2EncHandle Lzma2Enc_Create(ISzAlloc *alloc, ISzAlloc *allocBig)
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369 CLzma2Enc *p = (CLzma2Enc *)alloc->Alloc(alloc, sizeof(CLzma2Enc));
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372 Lzma2EncProps_Init(&p->props);
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373 Lzma2EncProps_Normalize(&p->props);
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376 p->allocBig = allocBig;
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379 for (i = 0; i < NUM_MT_CODER_THREADS_MAX; i++)
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380 p->coders[i].enc = 0;
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383 MtCoder_Construct(&p->mtCoder);
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389 void Lzma2Enc_Destroy(CLzma2EncHandle pp)
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391 CLzma2Enc *p = (CLzma2Enc *)pp;
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393 for (i = 0; i < NUM_MT_CODER_THREADS_MAX; i++)
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395 CLzma2EncInt *t = &p->coders[i];
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398 LzmaEnc_Destroy(t->enc, p->alloc, p->allocBig);
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404 MtCoder_Destruct(&p->mtCoder);
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407 IAlloc_Free(p->alloc, p->outBuf);
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408 IAlloc_Free(p->alloc, pp);
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411 SRes Lzma2Enc_SetProps(CLzma2EncHandle pp, const CLzma2EncProps *props)
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413 CLzma2Enc *p = (CLzma2Enc *)pp;
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414 CLzmaEncProps lzmaProps = props->lzmaProps;
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415 LzmaEncProps_Normalize(&lzmaProps);
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416 if (lzmaProps.lc + lzmaProps.lp > LZMA2_LCLP_MAX)
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417 return SZ_ERROR_PARAM;
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419 Lzma2EncProps_Normalize(&p->props);
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423 Byte Lzma2Enc_WriteProperties(CLzma2EncHandle pp)
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425 CLzma2Enc *p = (CLzma2Enc *)pp;
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427 UInt32 dicSize = LzmaEncProps_GetDictSize(&p->props.lzmaProps);
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428 for (i = 0; i < 40; i++)
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429 if (dicSize <= LZMA2_DIC_SIZE_FROM_PROP(i))
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434 SRes Lzma2Enc_Encode(CLzma2EncHandle pp,
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435 ISeqOutStream *outStream, ISeqInStream *inStream, ICompressProgress *progress)
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437 CLzma2Enc *p = (CLzma2Enc *)pp;
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440 for (i = 0; i < p->props.numBlockThreads; i++)
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442 CLzma2EncInt *t = &p->coders[i];
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443 if (t->enc == NULL)
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445 t->enc = LzmaEnc_Create(p->alloc);
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446 if (t->enc == NULL)
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447 return SZ_ERROR_MEM;
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452 if (p->props.numBlockThreads <= 1)
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454 return Lzma2Enc_EncodeMt1(&p->coders[0], p, outStream, inStream, progress);
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459 CMtCallbackImp mtCallback;
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461 mtCallback.funcTable.Code = MtCallbackImp_Code;
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462 mtCallback.lzma2Enc = p;
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464 p->mtCoder.progress = progress;
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465 p->mtCoder.inStream = inStream;
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466 p->mtCoder.outStream = outStream;
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467 p->mtCoder.alloc = p->alloc;
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468 p->mtCoder.mtCallback = &mtCallback.funcTable;
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470 p->mtCoder.blockSize = p->props.blockSize;
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471 p->mtCoder.destBlockSize = p->props.blockSize + (p->props.blockSize >> 10) + 16;
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472 p->mtCoder.numThreads = p->props.numBlockThreads;
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474 return MtCoder_Code(&p->mtCoder);
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