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Compress LZSA2 a bit faster again
This commit is contained in:
Emmanuel Marty
GitHub
parent
c6a93601cf
commit
bb1b4fda14
@ -194,61 +194,64 @@ static void lzsa_insert_forward_match_v2(lzsa_compressor *pCompressor, const uns
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for (j = 0; j < NARRIVALS_PER_POSITION_V2_BIG && arrival[j].from_slot; j++) {
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const int nRepOffset = arrival[j].rep_offset;
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if (nMatchOffset != nRepOffset && nRepOffset && arrival[j].rep_len >= MIN_MATCH_SIZE_V2) {
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const int nRepPos = arrival[j].rep_pos;
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if (nMatchOffset != nRepOffset && nRepOffset) {
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const int nRepLen = arrival[j].rep_len;
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if (nRepPos > nMatchOffset &&
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(nRepPos + nRepLen) <= nEndOffset) {
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if (nRepLen >= MIN_MATCH_SIZE_V2) {
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const int nRepPos = arrival[j].rep_pos;
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if (visited[nRepPos].offset != nMatchOffset || visited[nRepPos].length > nRepLen) {
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visited[nRepPos].offset = nMatchOffset;
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visited[nRepPos].length = 0;
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if (nRepPos > nMatchOffset &&
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(nRepPos + nRepLen) <= nEndOffset) {
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if (pCompressor->match[((nRepPos - nStartOffset) << MATCHES_PER_INDEX_SHIFT_V2) + NMATCHES_PER_INDEX_V2 - 1].length == 0) {
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if (!memcmp(pInWindow + nRepPos, pInWindow + nRepPos - nMatchOffset, 2)) {
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const int nLen0 = rle_len[nRepPos - nMatchOffset];
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const int nLen1 = rle_len[nRepPos];
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int nMinLen = (nLen0 < nLen1) ? nLen0 : nLen1;
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if (visited[nRepPos].offset != nMatchOffset || visited[nRepPos].length > nRepLen) {
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visited[nRepPos].offset = nMatchOffset;
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visited[nRepPos].length = 0;
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if (nMinLen >= nRepLen || !memcmp(pInWindow + nRepPos + nMinLen, pInWindow + nRepPos + nMinLen - nMatchOffset, nRepLen - nMinLen)) {
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lzsa_match* fwd_match = pCompressor->match + ((nRepPos - nStartOffset) << MATCHES_PER_INDEX_SHIFT_V2);
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int r;
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if (pCompressor->match[((nRepPos - nStartOffset) << MATCHES_PER_INDEX_SHIFT_V2) + NMATCHES_PER_INDEX_V2 - 1].length == 0) {
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if (!memcmp(pInWindow + nRepPos, pInWindow + nRepPos - nMatchOffset, 2)) {
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const int nLen0 = rle_len[nRepPos - nMatchOffset];
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const int nLen1 = rle_len[nRepPos];
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int nMinLen = (nLen0 < nLen1) ? nLen0 : nLen1;
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for (r = 0; fwd_match[r].length; r++) {
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if (fwd_match[r].offset == nMatchOffset) {
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r = NMATCHES_PER_INDEX_V2;
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break;
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if (nMinLen >= nRepLen || !memcmp(pInWindow + nRepPos + nMinLen, pInWindow + nRepPos + nMinLen - nMatchOffset, nRepLen - nMinLen)) {
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lzsa_match* fwd_match = pCompressor->match + ((nRepPos - nStartOffset) << MATCHES_PER_INDEX_SHIFT_V2);
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int r;
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for (r = 0; fwd_match[r].length; r++) {
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if (fwd_match[r].offset == nMatchOffset) {
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r = NMATCHES_PER_INDEX_V2;
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break;
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}
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}
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if (r < NMATCHES_PER_INDEX_V2) {
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int nMaxRepLen = nEndOffset - nRepPos;
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if (nMaxRepLen > LCP_MAX)
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nMaxRepLen = LCP_MAX;
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int nCurRepLen = (nMinLen > nRepLen) ? nMinLen : nRepLen;
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if (nCurRepLen > nMaxRepLen)
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nCurRepLen = nMaxRepLen;
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const unsigned char* pInWindowMax = pInWindow + nRepPos + nMaxRepLen;
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const unsigned char* pInWindowAtRepPos = pInWindow + nRepPos + nCurRepLen;
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while ((pInWindowAtRepPos + 8) < pInWindowMax && !memcmp(pInWindowAtRepPos, pInWindowAtRepPos - nMatchOffset, 8))
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pInWindowAtRepPos += 8;
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while ((pInWindowAtRepPos + 4) < pInWindowMax && !memcmp(pInWindowAtRepPos, pInWindowAtRepPos - nMatchOffset, 4))
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pInWindowAtRepPos += 4;
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while (pInWindowAtRepPos < pInWindowMax && pInWindowAtRepPos[0] == pInWindowAtRepPos[-nMatchOffset])
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pInWindowAtRepPos++;
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nCurRepLen = (int)(pInWindowAtRepPos - (pInWindow + nRepPos));
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fwd_match[r].offset = nMatchOffset;
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fwd_match[r].length = nCurRepLen;
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if (nDepth < 9)
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lzsa_insert_forward_match_v2(pCompressor, pInWindow, nRepPos, nMatchOffset, nStartOffset, nEndOffset, nDepth + 1);
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}
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}
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if (r < NMATCHES_PER_INDEX_V2) {
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int nMaxRepLen = nEndOffset - nRepPos;
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if (nMaxRepLen > LCP_MAX)
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nMaxRepLen = LCP_MAX;
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int nCurRepLen = (nMinLen > nRepLen) ? nMinLen : nRepLen;
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if (nCurRepLen > nMaxRepLen)
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nCurRepLen = nMaxRepLen;
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const unsigned char* pInWindowMax = pInWindow + nRepPos + nMaxRepLen;
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const unsigned char* pInWindowAtRepPos = pInWindow + nRepPos + nCurRepLen;
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while ((pInWindowAtRepPos + 8) < pInWindowMax && !memcmp(pInWindowAtRepPos, pInWindowAtRepPos - nMatchOffset, 8))
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pInWindowAtRepPos += 8;
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while ((pInWindowAtRepPos + 4) < pInWindowMax && !memcmp(pInWindowAtRepPos, pInWindowAtRepPos - nMatchOffset, 4))
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pInWindowAtRepPos += 4;
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while (pInWindowAtRepPos < pInWindowMax && pInWindowAtRepPos[0] == pInWindowAtRepPos[-nMatchOffset])
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pInWindowAtRepPos++;
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nCurRepLen = (int)(pInWindowAtRepPos - (pInWindow + nRepPos));
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fwd_match[r].offset = nMatchOffset;
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fwd_match[r].length = nCurRepLen;
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if (nDepth < 9)
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lzsa_insert_forward_match_v2(pCompressor, pInWindow, nRepPos, nMatchOffset, nStartOffset, nEndOffset, nDepth + 1);
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else {
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visited[nRepPos].length = nRepLen;
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}
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}
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else {
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visited[nRepPos].length = nRepLen;
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}
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}
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}
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}
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@ -525,14 +528,24 @@ static void lzsa_optimize_forward_v2(lzsa_compressor *pCompressor, const unsigne
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if (n < nArrivalsPerPosition - 1) {
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int nn;
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for (nn = n;
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nn < nArrivalsPerPosition && pDestSlots[nn].cost == nCodingChoiceCost;
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nn++) {
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if (pDestSlots[nn].rep_offset == nMatchOffset &&
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(!nInsertForwardReps || pDestSlots[nn].rep_pos >= i ||
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pDestSlots[nArrivalsPerPosition - 1].from_slot)) {
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exists = 1;
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break;
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if (!nInsertForwardReps || pDestSlots[nArrivalsPerPosition - 1].from_slot) {
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for (nn = n;
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nn < nArrivalsPerPosition && pDestSlots[nn].cost == nCodingChoiceCost;
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nn++) {
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if (pDestSlots[nn].rep_offset == nMatchOffset) {
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exists = 1;
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break;
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}
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}
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}
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else {
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for (nn = n;
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nn < nArrivalsPerPosition && pDestSlots[nn].cost == nCodingChoiceCost;
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nn++) {
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if (pDestSlots[nn].rep_offset == nMatchOffset && pDestSlots[nn].rep_pos >= i) {
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exists = 1;
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break;
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}
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}
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}
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@ -561,7 +574,7 @@ static void lzsa_optimize_forward_v2(lzsa_compressor *pCompressor, const unsigne
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pDestArrival->rep_offset = nMatchOffset;
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pDestArrival->rep_pos = i;
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pDestArrival->rep_len = k;
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nRepLenHandledMask[k >> 3] &= ~(1 << (k & 7));
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nRepLenHandledMask[k >> 3] &= ~((1 ^ nReduce) << (k & 7));
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}
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}
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}
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@ -577,81 +590,84 @@ static void lzsa_optimize_forward_v2(lzsa_compressor *pCompressor, const unsigne
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nRepLenHandledMask[k >> 3] |= 1 << (k & 7);
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for (nCurRepMatchArrival = 0; (j = nRepMatchArrivalIdxAndLen[nCurRepMatchArrival]) >= 0; nCurRepMatchArrival += 2) {
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int nMaskOffset = (j << 7) + (k >> 3);
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if (nRepMatchArrivalIdxAndLen[nCurRepMatchArrival + 1] >= k && (nReduce || !(nRepSlotHandledMask[nMaskOffset] & (1 << (k & 7))))) {
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const int nPrevCost = cur_arrival[j].cost & 0x3fffffff;
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int nRepCodingChoiceCost = nPrevCost /* the actual cost of the literals themselves accumulates up the chain */ + nMatchLenCost;
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int nScore = cur_arrival[j].score + 2;
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if (nRepMatchArrivalIdxAndLen[nCurRepMatchArrival + 1] >= k) {
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int nMaskOffset = (j << 7) + (k >> 3);
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if (nRepCodingChoiceCost < pDestSlots[nArrivalsPerPosition - 1].cost ||
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(nRepCodingChoiceCost == pDestSlots[nArrivalsPerPosition - 1].cost && nScore < (pDestSlots[nArrivalsPerPosition - 1].score + nDisableScore))) {
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int nRepOffset = cur_arrival[j].rep_offset;
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int exists = 0;
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if (nReduce || !(nRepSlotHandledMask[nMaskOffset] & (1 << (k & 7)))) {
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const int nPrevCost = cur_arrival[j].cost & 0x3fffffff;
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int nRepCodingChoiceCost = nPrevCost /* the actual cost of the literals themselves accumulates up the chain */ + nMatchLenCost;
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int nScore = cur_arrival[j].score + 2;
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for (n = 0;
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n < nArrivalsPerPosition && pDestSlots[n].cost < nRepCodingChoiceCost;
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n++) {
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if (pDestSlots[n].rep_offset == nRepOffset) {
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exists = 1;
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if (!nReduce)
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nRepSlotHandledMask[nMaskOffset] |= 1 << (k & 7);
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break;
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}
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}
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if (nRepCodingChoiceCost < pDestSlots[nArrivalsPerPosition - 1].cost ||
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(nRepCodingChoiceCost == pDestSlots[nArrivalsPerPosition - 1].cost && nScore < (pDestSlots[nArrivalsPerPosition - 1].score + nDisableScore))) {
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int nRepOffset = cur_arrival[j].rep_offset;
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int exists = 0;
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if (!exists) {
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for (;
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n < nArrivalsPerPosition && pDestSlots[n].cost == nRepCodingChoiceCost && nScore >= (pDestSlots[n].score + nDisableScore);
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for (n = 0;
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n < nArrivalsPerPosition && pDestSlots[n].cost < nRepCodingChoiceCost;
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n++) {
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if (pDestSlots[n].rep_offset == nRepOffset) {
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exists = 1;
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if (!nReduce)
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nRepSlotHandledMask[nMaskOffset] |= 1 << (k & 7);
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break;
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}
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}
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if (!exists) {
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if (n < nArrivalsPerPosition) {
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int nn;
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for (nn = n;
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nn < nArrivalsPerPosition && pDestSlots[nn].cost == nRepCodingChoiceCost;
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nn++) {
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if (pDestSlots[nn].rep_offset == nRepOffset) {
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exists = 1;
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break;
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}
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for (;
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n < nArrivalsPerPosition && pDestSlots[n].cost == nRepCodingChoiceCost && nScore >= (pDestSlots[n].score + nDisableScore);
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n++) {
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if (pDestSlots[n].rep_offset == nRepOffset) {
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exists = 1;
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break;
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}
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}
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if (!exists) {
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int z;
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if (!exists) {
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if (n < nArrivalsPerPosition) {
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int nn;
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for (z = n; z < nArrivalsPerPosition - 1 && pDestSlots[z].from_slot; z++) {
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if (pDestSlots[z].rep_offset == nRepOffset)
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for (nn = n;
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nn < nArrivalsPerPosition && pDestSlots[nn].cost == nRepCodingChoiceCost;
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nn++) {
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if (pDestSlots[nn].rep_offset == nRepOffset) {
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exists = 1;
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break;
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}
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}
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memmove(&pDestSlots[n + 1],
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&pDestSlots[n],
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sizeof(lzsa_arrival) * (z - n));
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if (!exists) {
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int z;
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lzsa_arrival* pDestArrival = &pDestSlots[n];
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pDestArrival->cost = nRepCodingChoiceCost;
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pDestArrival->from_pos = i;
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pDestArrival->from_slot = j + 1;
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pDestArrival->match_len = k;
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pDestArrival->num_literals = 0;
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pDestArrival->score = nScore;
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pDestArrival->rep_offset = nRepOffset;
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pDestArrival->rep_pos = i;
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pDestArrival->rep_len = k;
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nRepLenHandledMask[k >> 3] &= ~(1 << (k & 7));
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for (z = n; z < nArrivalsPerPosition - 1 && pDestSlots[z].from_slot; z++) {
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if (pDestSlots[z].rep_offset == nRepOffset)
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break;
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}
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memmove(&pDestSlots[n + 1],
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&pDestSlots[n],
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sizeof(lzsa_arrival) * (z - n));
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lzsa_arrival* pDestArrival = &pDestSlots[n];
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pDestArrival->cost = nRepCodingChoiceCost;
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pDestArrival->from_pos = i;
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pDestArrival->from_slot = j + 1;
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pDestArrival->match_len = k;
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pDestArrival->num_literals = 0;
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pDestArrival->score = nScore;
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pDestArrival->rep_offset = nRepOffset;
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pDestArrival->rep_pos = i;
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pDestArrival->rep_len = k;
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nRepLenHandledMask[k >> 3] &= ~((1 ^ nReduce) << (k & 7));
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}
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}
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}
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}
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}
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}
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else {
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break;
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else {
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break;
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}
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}
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}
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}
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