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494 lines
12 KiB
494 lines
12 KiB
![]()
4 years ago
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/* Lzma2Enc.c -- LZMA2 Encoder
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2012-06-19 : Igor Pavlov : Public domain */
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#include "Precomp.h"
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/* #include <stdio.h> */
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#include <string.h>
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/* #define _7ZIP_ST */
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#include "Lzma2Enc.h"
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#ifndef _7ZIP_ST
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#include "MtCoder.h"
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#else
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#define NUM_MT_CODER_THREADS_MAX 1
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#endif
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#define LZMA2_CONTROL_LZMA (1 << 7)
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#define LZMA2_CONTROL_COPY_NO_RESET 2
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#define LZMA2_CONTROL_COPY_RESET_DIC 1
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#define LZMA2_CONTROL_EOF 0
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#define LZMA2_LCLP_MAX 4
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#define LZMA2_DIC_SIZE_FROM_PROP(p) (((UInt32)2 | ((p) & 1)) << ((p) / 2 + 11))
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#define LZMA2_PACK_SIZE_MAX (1 << 16)
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#define LZMA2_COPY_CHUNK_SIZE LZMA2_PACK_SIZE_MAX
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#define LZMA2_UNPACK_SIZE_MAX (1 << 21)
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#define LZMA2_KEEP_WINDOW_SIZE LZMA2_UNPACK_SIZE_MAX
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#define LZMA2_CHUNK_SIZE_COMPRESSED_MAX ((1 << 16) + 16)
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#define PRF(x) /* x */
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/* ---------- CLzma2EncInt ---------- */
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typedef struct
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{
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CLzmaEncHandle enc;
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UInt64 srcPos;
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Byte props;
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Bool needInitState;
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Bool needInitProp;
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} CLzma2EncInt;
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static SRes Lzma2EncInt_Init(CLzma2EncInt *p, const CLzma2EncProps *props)
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{
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Byte propsEncoded[LZMA_PROPS_SIZE];
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SizeT propsSize = LZMA_PROPS_SIZE;
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RINOK(LzmaEnc_SetProps(p->enc, &props->lzmaProps));
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RINOK(LzmaEnc_WriteProperties(p->enc, propsEncoded, &propsSize));
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p->srcPos = 0;
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p->props = propsEncoded[0];
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p->needInitState = True;
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p->needInitProp = True;
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return SZ_OK;
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}
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SRes LzmaEnc_PrepareForLzma2(CLzmaEncHandle pp, ISeqInStream *inStream, UInt32 keepWindowSize,
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ISzAlloc *alloc, ISzAlloc *allocBig);
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SRes LzmaEnc_MemPrepare(CLzmaEncHandle pp, const Byte *src, SizeT srcLen,
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UInt32 keepWindowSize, ISzAlloc *alloc, ISzAlloc *allocBig);
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SRes LzmaEnc_CodeOneMemBlock(CLzmaEncHandle pp, Bool reInit,
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Byte *dest, size_t *destLen, UInt32 desiredPackSize, UInt32 *unpackSize);
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const Byte *LzmaEnc_GetCurBuf(CLzmaEncHandle pp);
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void LzmaEnc_Finish(CLzmaEncHandle pp);
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void LzmaEnc_SaveState(CLzmaEncHandle pp);
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void LzmaEnc_RestoreState(CLzmaEncHandle pp);
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static SRes Lzma2EncInt_EncodeSubblock(CLzma2EncInt *p, Byte *outBuf,
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size_t *packSizeRes, ISeqOutStream *outStream)
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{
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size_t packSizeLimit = *packSizeRes;
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size_t packSize = packSizeLimit;
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UInt32 unpackSize = LZMA2_UNPACK_SIZE_MAX;
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unsigned lzHeaderSize = 5 + (p->needInitProp ? 1 : 0);
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Bool useCopyBlock;
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SRes res;
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*packSizeRes = 0;
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if (packSize < lzHeaderSize)
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return SZ_ERROR_OUTPUT_EOF;
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packSize -= lzHeaderSize;
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LzmaEnc_SaveState(p->enc);
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res = LzmaEnc_CodeOneMemBlock(p->enc, p->needInitState,
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outBuf + lzHeaderSize, &packSize, LZMA2_PACK_SIZE_MAX, &unpackSize);
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PRF(printf("\npackSize = %7d unpackSize = %7d ", packSize, unpackSize));
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if (unpackSize == 0)
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return res;
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if (res == SZ_OK)
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useCopyBlock = (packSize + 2 >= unpackSize || packSize > (1 << 16));
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else
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{
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if (res != SZ_ERROR_OUTPUT_EOF)
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return res;
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res = SZ_OK;
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useCopyBlock = True;
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}
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if (useCopyBlock)
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{
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size_t destPos = 0;
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PRF(printf("################# COPY "));
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while (unpackSize > 0)
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{
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UInt32 u = (unpackSize < LZMA2_COPY_CHUNK_SIZE) ? unpackSize : LZMA2_COPY_CHUNK_SIZE;
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if (packSizeLimit - destPos < u + 3)
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return SZ_ERROR_OUTPUT_EOF;
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outBuf[destPos++] = (Byte)(p->srcPos == 0 ? LZMA2_CONTROL_COPY_RESET_DIC : LZMA2_CONTROL_COPY_NO_RESET);
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outBuf[destPos++] = (Byte)((u - 1) >> 8);
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outBuf[destPos++] = (Byte)(u - 1);
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memcpy(outBuf + destPos, LzmaEnc_GetCurBuf(p->enc) - unpackSize, u);
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unpackSize -= u;
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destPos += u;
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p->srcPos += u;
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if (outStream)
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{
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*packSizeRes += destPos;
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if (outStream->Write(outStream, outBuf, destPos) != destPos)
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return SZ_ERROR_WRITE;
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destPos = 0;
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}
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else
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*packSizeRes = destPos;
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/* needInitState = True; */
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}
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LzmaEnc_RestoreState(p->enc);
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return SZ_OK;
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}
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{
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size_t destPos = 0;
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UInt32 u = unpackSize - 1;
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UInt32 pm = (UInt32)(packSize - 1);
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unsigned mode = (p->srcPos == 0) ? 3 : (p->needInitState ? (p->needInitProp ? 2 : 1) : 0);
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PRF(printf(" "));
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outBuf[destPos++] = (Byte)(LZMA2_CONTROL_LZMA | (mode << 5) | ((u >> 16) & 0x1F));
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outBuf[destPos++] = (Byte)(u >> 8);
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outBuf[destPos++] = (Byte)u;
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outBuf[destPos++] = (Byte)(pm >> 8);
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outBuf[destPos++] = (Byte)pm;
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if (p->needInitProp)
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outBuf[destPos++] = p->props;
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p->needInitProp = False;
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p->needInitState = False;
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destPos += packSize;
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p->srcPos += unpackSize;
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if (outStream)
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if (outStream->Write(outStream, outBuf, destPos) != destPos)
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return SZ_ERROR_WRITE;
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*packSizeRes = destPos;
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return SZ_OK;
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}
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}
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/* ---------- Lzma2 Props ---------- */
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void Lzma2EncProps_Init(CLzma2EncProps *p)
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{
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LzmaEncProps_Init(&p->lzmaProps);
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p->numTotalThreads = -1;
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p->numBlockThreads = -1;
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p->blockSize = 0;
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}
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void Lzma2EncProps_Normalize(CLzma2EncProps *p)
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{
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int t1, t1n, t2, t3;
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{
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CLzmaEncProps lzmaProps = p->lzmaProps;
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LzmaEncProps_Normalize(&lzmaProps);
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t1n = lzmaProps.numThreads;
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}
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t1 = p->lzmaProps.numThreads;
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t2 = p->numBlockThreads;
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t3 = p->numTotalThreads;
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if (t2 > NUM_MT_CODER_THREADS_MAX)
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t2 = NUM_MT_CODER_THREADS_MAX;
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if (t3 <= 0)
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{
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if (t2 <= 0)
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t2 = 1;
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t3 = t1n * t2;
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}
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else if (t2 <= 0)
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{
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t2 = t3 / t1n;
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if (t2 == 0)
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{
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t1 = 1;
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t2 = t3;
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}
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if (t2 > NUM_MT_CODER_THREADS_MAX)
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t2 = NUM_MT_CODER_THREADS_MAX;
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}
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else if (t1 <= 0)
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{
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t1 = t3 / t2;
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if (t1 == 0)
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t1 = 1;
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}
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else
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t3 = t1n * t2;
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p->lzmaProps.numThreads = t1;
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LzmaEncProps_Normalize(&p->lzmaProps);
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if (p->blockSize == 0)
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{
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UInt32 dictSize = p->lzmaProps.dictSize;
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UInt64 blockSize = (UInt64)dictSize << 2;
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const UInt32 kMinSize = (UInt32)1 << 20;
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const UInt32 kMaxSize = (UInt32)1 << 28;
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if (blockSize < kMinSize) blockSize = kMinSize;
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if (blockSize > kMaxSize) blockSize = kMaxSize;
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if (blockSize < dictSize) blockSize = dictSize;
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p->blockSize = (size_t)blockSize;
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}
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if (t2 > 1)
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{
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UInt64 temp = p->lzmaProps.reduceSize + p->blockSize - 1;
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if (temp > p->lzmaProps.reduceSize)
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{
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UInt64 numBlocks = temp / p->blockSize;
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if (numBlocks < t2)
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{
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t2 = (UInt32)numBlocks;
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t3 = t1 * t2;
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}
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}
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}
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p->numBlockThreads = t2;
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p->numTotalThreads = t3;
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}
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static SRes Progress(ICompressProgress *p, UInt64 inSize, UInt64 outSize)
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{
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return (p && p->Progress(p, inSize, outSize) != SZ_OK) ? SZ_ERROR_PROGRESS : SZ_OK;
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}
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/* ---------- Lzma2 ---------- */
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typedef struct
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{
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Byte propEncoded;
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CLzma2EncProps props;
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Byte *outBuf;
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ISzAlloc *alloc;
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ISzAlloc *allocBig;
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CLzma2EncInt coders[NUM_MT_CODER_THREADS_MAX];
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#ifndef _7ZIP_ST
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CMtCoder mtCoder;
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#endif
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} CLzma2Enc;
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/* ---------- Lzma2EncThread ---------- */
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static SRes Lzma2Enc_EncodeMt1(CLzma2EncInt *p, CLzma2Enc *mainEncoder,
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ISeqOutStream *outStream, ISeqInStream *inStream, ICompressProgress *progress)
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{
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UInt64 packTotal = 0;
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SRes res = SZ_OK;
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if (mainEncoder->outBuf == 0)
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{
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mainEncoder->outBuf = (Byte *)IAlloc_Alloc(mainEncoder->alloc, LZMA2_CHUNK_SIZE_COMPRESSED_MAX);
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if (mainEncoder->outBuf == 0)
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return SZ_ERROR_MEM;
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}
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RINOK(Lzma2EncInt_Init(p, &mainEncoder->props));
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RINOK(LzmaEnc_PrepareForLzma2(p->enc, inStream, LZMA2_KEEP_WINDOW_SIZE,
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mainEncoder->alloc, mainEncoder->allocBig));
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for (;;)
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{
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size_t packSize = LZMA2_CHUNK_SIZE_COMPRESSED_MAX;
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res = Lzma2EncInt_EncodeSubblock(p, mainEncoder->outBuf, &packSize, outStream);
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if (res != SZ_OK)
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break;
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packTotal += packSize;
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res = Progress(progress, p->srcPos, packTotal);
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if (res != SZ_OK)
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break;
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if (packSize == 0)
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break;
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}
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LzmaEnc_Finish(p->enc);
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if (res == SZ_OK)
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{
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Byte b = 0;
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if (outStream->Write(outStream, &b, 1) != 1)
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return SZ_ERROR_WRITE;
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}
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return res;
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}
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#ifndef _7ZIP_ST
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typedef struct
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{
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IMtCoderCallback funcTable;
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CLzma2Enc *lzma2Enc;
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} CMtCallbackImp;
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static SRes MtCallbackImp_Code(void *pp, unsigned index, Byte *dest, size_t *destSize,
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const Byte *src, size_t srcSize, int finished)
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{
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CMtCallbackImp *imp = (CMtCallbackImp *)pp;
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CLzma2Enc *mainEncoder = imp->lzma2Enc;
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CLzma2EncInt *p = &mainEncoder->coders[index];
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SRes res = SZ_OK;
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{
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size_t destLim = *destSize;
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*destSize = 0;
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if (srcSize != 0)
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{
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RINOK(Lzma2EncInt_Init(p, &mainEncoder->props));
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RINOK(LzmaEnc_MemPrepare(p->enc, src, srcSize, LZMA2_KEEP_WINDOW_SIZE,
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mainEncoder->alloc, mainEncoder->allocBig));
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while (p->srcPos < srcSize)
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{
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size_t packSize = destLim - *destSize;
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res = Lzma2EncInt_EncodeSubblock(p, dest + *destSize, &packSize, NULL);
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if (res != SZ_OK)
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break;
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*destSize += packSize;
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if (packSize == 0)
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{
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res = SZ_ERROR_FAIL;
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break;
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}
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if (MtProgress_Set(&mainEncoder->mtCoder.mtProgress, index, p->srcPos, *destSize) != SZ_OK)
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{
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res = SZ_ERROR_PROGRESS;
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break;
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}
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}
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LzmaEnc_Finish(p->enc);
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if (res != SZ_OK)
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return res;
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}
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if (finished)
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{
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if (*destSize == destLim)
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return SZ_ERROR_OUTPUT_EOF;
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dest[(*destSize)++] = 0;
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}
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}
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return res;
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}
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#endif
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/* ---------- Lzma2Enc ---------- */
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CLzma2EncHandle Lzma2Enc_Create(ISzAlloc *alloc, ISzAlloc *allocBig)
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{
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CLzma2Enc *p = (CLzma2Enc *)alloc->Alloc(alloc, sizeof(CLzma2Enc));
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if (p == 0)
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return NULL;
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Lzma2EncProps_Init(&p->props);
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Lzma2EncProps_Normalize(&p->props);
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p->outBuf = 0;
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p->alloc = alloc;
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p->allocBig = allocBig;
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{
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unsigned i;
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for (i = 0; i < NUM_MT_CODER_THREADS_MAX; i++)
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p->coders[i].enc = 0;
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}
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#ifndef _7ZIP_ST
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MtCoder_Construct(&p->mtCoder);
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#endif
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return p;
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}
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void Lzma2Enc_Destroy(CLzma2EncHandle pp)
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{
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CLzma2Enc *p = (CLzma2Enc *)pp;
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unsigned i;
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for (i = 0; i < NUM_MT_CODER_THREADS_MAX; i++)
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{
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CLzma2EncInt *t = &p->coders[i];
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if (t->enc)
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{
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LzmaEnc_Destroy(t->enc, p->alloc, p->allocBig);
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t->enc = 0;
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}
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}
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#ifndef _7ZIP_ST
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MtCoder_Destruct(&p->mtCoder);
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#endif
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IAlloc_Free(p->alloc, p->outBuf);
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IAlloc_Free(p->alloc, pp);
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}
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|
|
||
|
SRes Lzma2Enc_SetProps(CLzma2EncHandle pp, const CLzma2EncProps *props)
|
||
|
{
|
||
|
CLzma2Enc *p = (CLzma2Enc *)pp;
|
||
|
CLzmaEncProps lzmaProps = props->lzmaProps;
|
||
|
LzmaEncProps_Normalize(&lzmaProps);
|
||
|
if (lzmaProps.lc + lzmaProps.lp > LZMA2_LCLP_MAX)
|
||
|
return SZ_ERROR_PARAM;
|
||
|
p->props = *props;
|
||
|
Lzma2EncProps_Normalize(&p->props);
|
||
|
return SZ_OK;
|
||
|
}
|
||
|
|
||
|
Byte Lzma2Enc_WriteProperties(CLzma2EncHandle pp)
|
||
|
{
|
||
|
CLzma2Enc *p = (CLzma2Enc *)pp;
|
||
|
unsigned i;
|
||
|
UInt32 dicSize = LzmaEncProps_GetDictSize(&p->props.lzmaProps);
|
||
|
for (i = 0; i < 40; i++)
|
||
|
if (dicSize <= LZMA2_DIC_SIZE_FROM_PROP(i))
|
||
|
break;
|
||
|
return (Byte)i;
|
||
|
}
|
||
|
|
||
|
SRes Lzma2Enc_Encode(CLzma2EncHandle pp,
|
||
|
ISeqOutStream *outStream, ISeqInStream *inStream, ICompressProgress *progress)
|
||
|
{
|
||
|
CLzma2Enc *p = (CLzma2Enc *)pp;
|
||
|
int i;
|
||
|
|
||
|
for (i = 0; i < p->props.numBlockThreads; i++)
|
||
|
{
|
||
|
CLzma2EncInt *t = &p->coders[i];
|
||
|
if (t->enc == NULL)
|
||
|
{
|
||
|
t->enc = LzmaEnc_Create(p->alloc);
|
||
|
if (t->enc == NULL)
|
||
|
return SZ_ERROR_MEM;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
#ifndef _7ZIP_ST
|
||
|
if (p->props.numBlockThreads <= 1)
|
||
|
#endif
|
||
|
return Lzma2Enc_EncodeMt1(&p->coders[0], p, outStream, inStream, progress);
|
||
|
|
||
|
#ifndef _7ZIP_ST
|
||
|
|
||
|
{
|
||
|
CMtCallbackImp mtCallback;
|
||
|
|
||
|
mtCallback.funcTable.Code = MtCallbackImp_Code;
|
||
|
mtCallback.lzma2Enc = p;
|
||
|
|
||
|
p->mtCoder.progress = progress;
|
||
|
p->mtCoder.inStream = inStream;
|
||
|
p->mtCoder.outStream = outStream;
|
||
|
p->mtCoder.alloc = p->alloc;
|
||
|
p->mtCoder.mtCallback = &mtCallback.funcTable;
|
||
|
|
||
|
p->mtCoder.blockSize = p->props.blockSize;
|
||
|
p->mtCoder.destBlockSize = p->props.blockSize + (p->props.blockSize >> 10) + 16;
|
||
|
p->mtCoder.numThreads = p->props.numBlockThreads;
|
||
|
|
||
|
return MtCoder_Code(&p->mtCoder);
|
||
|
}
|
||
|
#endif
|
||
|
}
|