ref: f7e5af47f117be34669dc1e532d525dcbbff73f0
dir: /jpc_t1enc.c/
/* * Copyright (c) 1999-2000 Image Power, Inc. and the University of * British Columbia. * Copyright (c) 2001-2002 Michael David Adams. * All rights reserved. */ /* __START_OF_JASPER_LICENSE__ * * JasPer License Version 2.0 * * Copyright (c) 2001-2006 Michael David Adams * Copyright (c) 1999-2000 Image Power, Inc. * Copyright (c) 1999-2000 The University of British Columbia * * All rights reserved. * * Permission is hereby granted, free of charge, to any person (the * "User") obtaining a copy of this software and associated documentation * files (the "Software"), to deal in the Software without restriction, * including without limitation the rights to use, copy, modify, merge, * publish, distribute, and/or sell copies of the Software, and to permit * persons to whom the Software is furnished to do so, subject to the * following conditions: * * 1. The above copyright notices and this permission notice (which * includes the disclaimer below) shall be included in all copies or * substantial portions of the Software. * * 2. The name of a copyright holder shall not be used to endorse or * promote products derived from the Software without specific prior * written permission. * * THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS * LICENSE. NO USE OF THE SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER * THIS DISCLAIMER. THE SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS * "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A * PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. IN NO * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL * INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. NO ASSURANCES ARE * PROVIDED BY THE COPYRIGHT HOLDERS THAT THE SOFTWARE DOES NOT INFRINGE * THE PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OF ANY OTHER ENTITY. * EACH COPYRIGHT HOLDER DISCLAIMS ANY LIABILITY TO THE USER FOR CLAIMS * BROUGHT BY ANY OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL * PROPERTY RIGHTS OR OTHERWISE. AS A CONDITION TO EXERCISING THE RIGHTS * GRANTED HEREUNDER, EACH USER HEREBY ASSUMES SOLE RESPONSIBILITY TO SECURE * ANY OTHER INTELLECTUAL PROPERTY RIGHTS NEEDED, IF ANY. THE SOFTWARE * IS NOT FAULT-TOLERANT AND IS NOT INTENDED FOR USE IN MISSION-CRITICAL * SYSTEMS, SUCH AS THOSE USED IN THE OPERATION OF NUCLEAR FACILITIES, * AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL * SYSTEMS, DIRECT LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH * THE FAILURE OF THE SOFTWARE OR SYSTEM COULD LEAD DIRECTLY TO DEATH, * PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH * RISK ACTIVITIES"). THE COPYRIGHT HOLDERS SPECIFICALLY DISCLAIM ANY * EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES. * * __END_OF_JASPER_LICENSE__ */ /* * Tier 1 Encoder * * $Id$ */ /******************************************************************************\ * Includes. \******************************************************************************/ #include "jpc_t1enc.h" #include "jpc_t1cod.h" #include "jpc_enc.h" #include "jpc_math.h" #include "jasper/jas_malloc.h" #include "jasper/jas_math.h" #include "jasper/jas_debug.h" /* Encode a single code block. */ static int jpc_enc_enccblk(const jpc_enc_tcmpt_t *comp, const jpc_enc_band_t *band, jpc_enc_cblk_t *cblk); static int jpc_encsigpass(jpc_mqenc_t *mqenc, int bitpos, enum jpc_tsfb_orient orient, bool vcausalflag, jas_matrix_t *flags, const jas_matrix_t *data, int term, long *nmsedec); static int jpc_encrefpass(jpc_mqenc_t *mqenc, int bitpos, jas_matrix_t *flags, const jas_matrix_t *data, int term, long *nmsedec); static int jpc_encclnpass(jpc_mqenc_t *mqenc, int bitpos, enum jpc_tsfb_orient orient, bool vcausalflag, bool segsym, jas_matrix_t *flags, const jas_matrix_t *data, int term, long *nmsedec); static int jpc_encrawsigpass(jpc_bitstream_t *out, int bitpos, bool vcausalflag, jas_matrix_t *flags, const jas_matrix_t *data, int term, long *nmsedec); static int jpc_encrawrefpass(jpc_bitstream_t *out, int bitpos, jas_matrix_t *flags, const jas_matrix_t *data, int term, long *nmsedec); /******************************************************************************\ * Code for encoding code blocks. \******************************************************************************/ /* Encode all of the code blocks associated with the current tile. */ int jpc_enc_enccblks(jpc_enc_t *enc) { jpc_enc_tcmpt_t *tcmpt; jpc_enc_tcmpt_t *endcomps; jpc_enc_rlvl_t *lvl; jpc_enc_rlvl_t *endlvls; jpc_enc_band_t *band; jpc_enc_band_t *endbands; jpc_enc_cblk_t *cblk; jpc_enc_cblk_t *endcblks; jpc_fix_t mx; jpc_fix_t bmx; jpc_fix_t v; jpc_enc_tile_t *tile; uint_fast32_t prcno; jpc_enc_prc_t *prc; tile = enc->curtile; endcomps = &tile->tcmpts[tile->numtcmpts]; for (tcmpt = tile->tcmpts; tcmpt != endcomps; ++tcmpt) { endlvls = &tcmpt->rlvls[tcmpt->numrlvls]; for (lvl = tcmpt->rlvls; lvl != endlvls; ++lvl) { if (!lvl->bands) { continue; } endbands = &lvl->bands[lvl->numbands]; for (band = lvl->bands; band != endbands; ++band) { if (!band->data) { continue; } for (prcno = 0, prc = band->prcs; prcno < lvl->numprcs; ++prcno, ++prc) { if (!prc->cblks) { continue; } bmx = 0; endcblks = &prc->cblks[prc->numcblks]; for (cblk = prc->cblks; cblk != endcblks; ++cblk) { mx = 0; for (jas_matind_t i = 0; i < jas_matrix_numrows(cblk->data); ++i) { for (jas_matind_t j = 0; j < jas_matrix_numcols(cblk->data); ++j) { v = JAS_ABS(jas_matrix_get(cblk->data, i, j)); if (v > mx) { mx = v; } } } if (mx > bmx) { bmx = mx; } cblk->numbps = JAS_MAX(jpc_fix_firstone(mx) + 1 - JPC_NUMEXTRABITS, 0); } for (cblk = prc->cblks; cblk != endcblks; ++cblk) { cblk->numimsbs = band->numbps - cblk->numbps; assert(cblk->numimsbs >= 0); } for (cblk = prc->cblks; cblk != endcblks; ++cblk) { if (jpc_enc_enccblk(tcmpt, band, cblk)) { return -1; } } } } } } return 0; } static int getthebyte(jas_stream_t *in, long off) { int c; long oldpos; oldpos = jas_stream_tell(in); assert(oldpos >= 0); jas_stream_seek(in, off, SEEK_SET); c = jas_stream_peekc(in); jas_stream_seek(in, oldpos, SEEK_SET); return c; } /* Encode a single code block. */ static int jpc_enc_enccblk(const jpc_enc_tcmpt_t *tcmpt, const jpc_enc_band_t *band, jpc_enc_cblk_t *cblk) { jpc_enc_pass_t *pass; jpc_enc_pass_t *endpasses; int bitpos; int n; int ret = -1; jpc_bitstream_t *bout; int c; bout = 0; if (!(cblk->stream = jas_stream_memopen(0, 0))) { goto error; } if (!(cblk->mqenc = jpc_mqenc_create(JPC_NUMCTXS, cblk->stream))) { goto error; } jpc_mqenc_setctxs(cblk->mqenc, JPC_NUMCTXS, jpc_mqctxs); cblk->numpasses = (cblk->numbps > 0) ? (3 * cblk->numbps - 2) : 0; if (cblk->numpasses > 0) { if (!(cblk->passes = jas_alloc2(cblk->numpasses, sizeof(jpc_enc_pass_t)))) { goto error; }; } else { cblk->passes = 0; } endpasses = (cblk->passes) ? &cblk->passes[cblk->numpasses] : 0; for (pass = cblk->passes; pass != endpasses; ++pass) { pass->start = 0; pass->end = 0; pass->term = JPC_ISTERMINATED(pass - cblk->passes, 0, cblk->numpasses, (tcmpt->cblksty & JPC_COX_TERMALL) != 0, (tcmpt->cblksty & JPC_COX_LAZY) != 0); pass->type = JPC_SEGTYPE(pass - cblk->passes, 0, (tcmpt->cblksty & JPC_COX_LAZY) != 0); pass->lyrno = -1; if (pass == endpasses - 1) { assert(pass->term == 1); pass->term = 1; } } if (!(cblk->flags = jas_matrix_create(jas_matrix_numrows(cblk->data) + 2, jas_matrix_numcols(cblk->data) + 2))) { jas_logerrorf("cannot create matrix\n"); goto error; } bitpos = cblk->numbps - 1; pass = cblk->passes; n = cblk->numpasses; while (--n >= 0) { if (pass->type == JPC_SEG_MQ) { /* NOP */ } else { assert(pass->type == JPC_SEG_RAW); if (!bout) { bout = jpc_bitstream_sopen(cblk->stream, "w"); if (!bout) { goto error; } } } enum jpc_passtype passtype = JPC_PASSTYPE(pass - cblk->passes); pass->start = jas_stream_tell(cblk->stream); #if 0 assert(jas_stream_tell(cblk->stream) == jas_stream_getrwcount(cblk->stream)); #endif assert(bitpos >= 0); const bool vcausal = (tcmpt->cblksty & JPC_COX_VSC) != 0; const bool segsym = (tcmpt->cblksty & JPC_COX_SEGSYM) != 0; unsigned termmode; if (pass->term) { termmode = ((tcmpt->cblksty & JPC_COX_PTERM) ? JPC_MQENC_PTERM : JPC_MQENC_DEFTERM) + 1; } else { termmode = 0; } switch (passtype) { case JPC_SIGPASS: ret = (pass->type == JPC_SEG_MQ) ? jpc_encsigpass(cblk->mqenc, bitpos, band->orient, vcausal, cblk->flags, cblk->data, termmode, &pass->nmsedec) : jpc_encrawsigpass(bout, bitpos, vcausal, cblk->flags, cblk->data, termmode, &pass->nmsedec); break; case JPC_REFPASS: ret = (pass->type == JPC_SEG_MQ) ? jpc_encrefpass(cblk->mqenc, bitpos, cblk->flags, cblk->data, termmode, &pass->nmsedec) : jpc_encrawrefpass(bout, bitpos, cblk->flags, cblk->data, termmode, &pass->nmsedec); break; case JPC_CLNPASS: assert(pass->type == JPC_SEG_MQ); ret = jpc_encclnpass(cblk->mqenc, bitpos, band->orient, vcausal, segsym, cblk->flags, cblk->data, termmode, &pass->nmsedec); break; default: assert(0); break; } if (ret) { if (bout) { jpc_bitstream_close(bout); } goto error; } if (pass->type == JPC_SEG_MQ) { if (pass->term) { jpc_mqenc_init(cblk->mqenc); } jpc_mqenc_getstate(cblk->mqenc, &pass->mqencstate); pass->end = jas_stream_tell(cblk->stream); if (tcmpt->cblksty & JPC_COX_RESET) { jpc_mqenc_setctxs(cblk->mqenc, JPC_NUMCTXS, jpc_mqctxs); } } else { if (pass->term) { if (jpc_bitstream_pending(bout)) { jpc_bitstream_outalign(bout, 0x2a); } jpc_bitstream_close(bout); bout = 0; pass->end = jas_stream_tell(cblk->stream); } else { pass->end = jas_stream_tell(cblk->stream) + jpc_bitstream_pending(bout); /* NOTE - This will not work. need to adjust by # of pending output bytes */ } } #if 0 /* XXX - This assertion fails sometimes when various coding modes are used. This seems to be harmless, but why does it happen at all? */ assert(jas_stream_tell(cblk->stream) == jas_stream_getrwcount(cblk->stream)); #endif pass->wmsedec = jpc_fixtodbl(band->rlvl->tcmpt->synweight) * jpc_fixtodbl(band->rlvl->tcmpt->synweight) * jpc_fixtodbl(band->synweight) * jpc_fixtodbl(band->synweight) * jpc_fixtodbl(band->absstepsize) * jpc_fixtodbl(band->absstepsize) * ((double) (1 << bitpos)) * ((double)(1 << bitpos)) * jpc_fixtodbl(pass->nmsedec); pass->cumwmsedec = pass->wmsedec; if (pass != cblk->passes) { pass->cumwmsedec += pass[-1].cumwmsedec; } if (passtype == JPC_CLNPASS) { --bitpos; } ++pass; } #if 0 dump_passes(cblk->passes, cblk->numpasses, cblk); #endif n = 0; endpasses = (cblk->passes) ? &cblk->passes[cblk->numpasses] : 0; for (pass = cblk->passes; pass != endpasses; ++pass) { if (pass->start < n) { pass->start = n; } if (pass->end < n) { pass->end = n; } if (!pass->term) { const jpc_enc_pass_t *termpass = pass; while (termpass - pass < cblk->numpasses && !termpass->term) { ++termpass; } if (pass->type == JPC_SEG_MQ) { unsigned t = (pass->mqencstate.lastbyte == 0xff) ? 1 : 0; unsigned adjust; if (pass->mqencstate.ctreg >= 5) { adjust = 4 + t; } else { adjust = 5 + t; } pass->end += adjust; } if (pass->end > termpass->end) { pass->end = termpass->end; } if ((c = getthebyte(cblk->stream, pass->end - 1)) == EOF) { if (bout) { jpc_bitstream_close(bout); } return -1; } if (c == 0xff) { ++pass->end; } n = JAS_MAX(n, pass->end); } else { n = JAS_MAX(n, pass->end); } } #if 0 dump_passes(cblk->passes, cblk->numpasses, cblk); #endif if (bout) { jpc_bitstream_close(bout); } return 0; error: return -1; } /******************************************************************************\ * Code for significance pass. \******************************************************************************/ #define sigpass_step(fp, frowstep, dp, bitpos, one, nmsedec, orient, mqenc, vcausalflag) \ { \ jpc_fix_t f; \ f = *(fp); \ if ((f & JPC_OTHSIGMSK) && !(f & (JPC_SIG | JPC_VISIT))) { \ bool v = (JAS_ABS(*(dp)) & (one)) != 0; \ jpc_mqenc_setcurctx(mqenc, JPC_GETZCCTXNO(f, (orient))); \ jpc_mqenc_putbit(mqenc, v); \ if (v) { \ *(nmsedec) += JPC_GETSIGNMSEDEC(JAS_ABS(*(dp)), (bitpos) + JPC_NUMEXTRABITS); \ v = ((*(dp) < 0) ? 1 : 0); \ jpc_mqenc_setcurctx(mqenc, JPC_GETSCCTXNO(f)); \ jpc_mqenc_putbit(mqenc, v ^ JPC_GETSPB(f)); \ JPC_UPDATEFLAGS4(fp, frowstep, v, vcausalflag); \ *(fp) |= JPC_SIG; \ } \ *(fp) |= JPC_VISIT; \ } \ } static int jpc_encsigpass(jpc_mqenc_t *mqenc, int bitpos, enum jpc_tsfb_orient orient, bool vcausalflag, jas_matrix_t *flags, const jas_matrix_t *data, int term, long *nmsedec) { int i; int one; jpc_fix_t *fstripestart; jpc_fix_t *fp; jpc_fix_t *fvscanstart; *nmsedec = 0; const unsigned width = jas_matrix_numcols(data); const unsigned height = jas_matrix_numrows(data); const unsigned frowstep = jas_matrix_rowstep(flags); const unsigned drowstep = jas_matrix_rowstep(data); const unsigned fstripestep = frowstep << 2; const unsigned dstripestep = drowstep << 2; one = 1 << (bitpos + JPC_NUMEXTRABITS); fstripestart = jas_matrix_getref(flags, 1, 1); const jpc_fix_t *dstripestart = jas_matrix_getref(data, 0, 0); for (i = height; i > 0; i -= 4, fstripestart += fstripestep, dstripestart += dstripestep) { fvscanstart = fstripestart; const jpc_fix_t *dvscanstart = dstripestart; const unsigned vscanlen = JAS_MIN(i, 4); for (unsigned j = width; j > 0; --j, ++fvscanstart, ++dvscanstart) { fp = fvscanstart; const jpc_fix_t *dp = dvscanstart; unsigned k = vscanlen; sigpass_step(fp, frowstep, dp, bitpos, one, nmsedec, orient, mqenc, vcausalflag); if (--k <= 0) { continue; } fp += frowstep; dp += drowstep; sigpass_step(fp, frowstep, dp, bitpos, one, nmsedec, orient, mqenc, 0); if (--k <= 0) { continue; } fp += frowstep; dp += drowstep; sigpass_step(fp, frowstep, dp, bitpos, one, nmsedec, orient, mqenc, 0); if (--k <= 0) { continue; } fp += frowstep; dp += drowstep; sigpass_step(fp, frowstep, dp, bitpos, one, nmsedec, orient, mqenc, 0); } } if (term) { jpc_mqenc_flush(mqenc, term - 1); } return jpc_mqenc_error(mqenc) ? (-1) : 0; } #define rawsigpass_step(fp, frowstep, dp, bitpos, one, nmsedec, out, vcausalflag) \ { \ jpc_fix_t f = *(fp); \ if ((f & JPC_OTHSIGMSK) && !(f & (JPC_SIG | JPC_VISIT))) { \ bool v = (JAS_ABS(*(dp)) & (one)) != 0; \ if ((jpc_bitstream_putbit((out), v)) == EOF) { \ return -1; \ } \ if (v) { \ *(nmsedec) += JPC_GETSIGNMSEDEC(JAS_ABS(*(dp)), (bitpos) + JPC_NUMEXTRABITS); \ v = *(dp) < 0; \ if (jpc_bitstream_putbit(out, v) == EOF) { \ return -1; \ } \ JPC_UPDATEFLAGS4(fp, frowstep, v, vcausalflag); \ *(fp) |= JPC_SIG; \ } \ *(fp) |= JPC_VISIT; \ } \ } static int jpc_encrawsigpass(jpc_bitstream_t *out, int bitpos, bool vcausalflag, jas_matrix_t *flags, const jas_matrix_t *data, int term, long *nmsedec) { int i; int one; jpc_fix_t *fstripestart; jpc_fix_t *fp; jpc_fix_t *fvscanstart; *nmsedec = 0; const unsigned width = jas_matrix_numcols(data); const unsigned height = jas_matrix_numrows(data); const unsigned frowstep = jas_matrix_rowstep(flags); const unsigned drowstep = jas_matrix_rowstep(data); const unsigned fstripestep = frowstep << 2; const unsigned dstripestep = drowstep << 2; one = 1 << (bitpos + JPC_NUMEXTRABITS); fstripestart = jas_matrix_getref(flags, 1, 1); const jpc_fix_t *dstripestart = jas_matrix_getref(data, 0, 0); for (i = height; i > 0; i -= 4, fstripestart += fstripestep, dstripestart += dstripestep) { fvscanstart = fstripestart; const jpc_fix_t *dvscanstart = dstripestart; const unsigned vscanlen = JAS_MIN(i, 4); for (unsigned j = width; j > 0; --j, ++fvscanstart, ++dvscanstart) { fp = fvscanstart; const jpc_fix_t *dp = dvscanstart; unsigned k = vscanlen; rawsigpass_step(fp, frowstep, dp, bitpos, one, nmsedec, out, vcausalflag); if (--k <= 0) { continue; } fp += frowstep; dp += drowstep; rawsigpass_step(fp, frowstep, dp, bitpos, one, nmsedec, out, 0); if (--k <= 0) { continue; } fp += frowstep; dp += drowstep; rawsigpass_step(fp, frowstep, dp, bitpos, one, nmsedec, out, 0); if (--k <= 0) { continue; } fp += frowstep; dp += drowstep; rawsigpass_step(fp, frowstep, dp, bitpos, one, nmsedec, out, 0); if (--k <= 0) { continue; } } } if (term) { jpc_bitstream_outalign(out, 0x2a); } return 0; } /******************************************************************************\ * Code for refinement pass. \******************************************************************************/ #define refpass_step(fp, dp, bitpos, one, nmsedec, mqenc, vcausalflag) \ { \ if (((*(fp)) & (JPC_SIG | JPC_VISIT)) == JPC_SIG) { \ (d) = *(dp); \ *(nmsedec) += JPC_GETREFNMSEDEC(JAS_ABS(d), (bitpos) + JPC_NUMEXTRABITS); \ jpc_mqenc_setcurctx((mqenc), JPC_GETMAGCTXNO(*(fp))); \ const bool v = (JAS_ABS(d) & (one)) != 0; \ jpc_mqenc_putbit((mqenc), v); \ *(fp) |= JPC_REFINE; \ } \ } static int jpc_encrefpass(jpc_mqenc_t *mqenc, int bitpos, jas_matrix_t *flags, const jas_matrix_t *data, int term, long *nmsedec) { int i; int one; int d; jpc_fix_t *fstripestart; jpc_fix_t *fvscanstart; jpc_fix_t *fp; *nmsedec = 0; const unsigned width = jas_matrix_numcols(data); const unsigned height = jas_matrix_numrows(data); const unsigned frowstep = jas_matrix_rowstep(flags); const unsigned drowstep = jas_matrix_rowstep(data); const unsigned fstripestep = frowstep << 2; const unsigned dstripestep = drowstep << 2; one = 1 << (bitpos + JPC_NUMEXTRABITS); fstripestart = jas_matrix_getref(flags, 1, 1); const jpc_fix_t *dstripestart = jas_matrix_getref(data, 0, 0); for (i = height; i > 0; i -= 4, fstripestart += fstripestep, dstripestart += dstripestep) { fvscanstart = fstripestart; const jpc_fix_t *dvscanstart = dstripestart; const unsigned vscanlen = JAS_MIN(i, 4); for (unsigned j = width; j > 0; --j, ++fvscanstart, ++dvscanstart) { fp = fvscanstart; const jpc_fix_t *dp = dvscanstart; unsigned k = vscanlen; refpass_step(fp, dp, bitpos, one, nmsedec, mqenc, vcausalflag); if (--k <= 0) { continue; } fp += frowstep; dp += drowstep; refpass_step(fp, dp, bitpos, one, nmsedec, mqenc, 0); if (--k <= 0) { continue; } fp += frowstep; dp += drowstep; refpass_step(fp, dp, bitpos, one, nmsedec, mqenc, 0); if (--k <= 0) { continue; } fp += frowstep; dp += drowstep; refpass_step(fp, dp, bitpos, one, nmsedec, mqenc, 0); } } if (term) { jpc_mqenc_flush(mqenc, term - 1); } return jpc_mqenc_error(mqenc) ? (-1) : 0; } #define rawrefpass_step(fp, dp, bitpos, one, nmsedec, out, vcausalflag) \ { \ jpc_fix_t d; \ if (((*(fp)) & (JPC_SIG | JPC_VISIT)) == JPC_SIG) { \ d = *(dp); \ *(nmsedec) += JPC_GETREFNMSEDEC(JAS_ABS(d), (bitpos) + JPC_NUMEXTRABITS); \ const bool v = (JAS_ABS(d) & (one)) != 0; \ if (jpc_bitstream_putbit((out), v) == EOF) { \ return -1; \ } \ *(fp) |= JPC_REFINE; \ } \ } static int jpc_encrawrefpass(jpc_bitstream_t *out, int bitpos, jas_matrix_t *flags, const jas_matrix_t *data, int term, long *nmsedec) { int i; int one; jpc_fix_t *fstripestart; jpc_fix_t *fvscanstart; jpc_fix_t *fp; *nmsedec = 0; const unsigned width = jas_matrix_numcols(data); const unsigned height = jas_matrix_numrows(data); const unsigned frowstep = jas_matrix_rowstep(flags); const unsigned drowstep = jas_matrix_rowstep(data); const unsigned fstripestep = frowstep << 2; const unsigned dstripestep = drowstep << 2; one = 1 << (bitpos + JPC_NUMEXTRABITS); fstripestart = jas_matrix_getref(flags, 1, 1); const jpc_fix_t *dstripestart = jas_matrix_getref(data, 0, 0); for (i = height; i > 0; i -= 4, fstripestart += fstripestep, dstripestart += dstripestep) { fvscanstart = fstripestart; const jpc_fix_t *dvscanstart = dstripestart; const unsigned vscanlen = JAS_MIN(i, 4); for (unsigned j = width; j > 0; --j, ++fvscanstart, ++dvscanstart) { fp = fvscanstart; const jpc_fix_t *dp = dvscanstart; unsigned k = vscanlen; rawrefpass_step(fp, dp, bitpos, one, nmsedec, out, vcausalflag); if (--k <= 0) { continue; } fp += frowstep; dp += drowstep; rawrefpass_step(fp, dp, bitpos, one, nmsedec, out, vcausalflag); if (--k <= 0) { continue; } fp += frowstep; dp += drowstep; rawrefpass_step(fp, dp, bitpos, one, nmsedec, out, vcausalflag); if (--k <= 0) { continue; } fp += frowstep; dp += drowstep; rawrefpass_step(fp, dp, bitpos, one, nmsedec, out, vcausalflag); } } if (term) { jpc_bitstream_outalign(out, 0x2a); } return 0; } /******************************************************************************\ * Code for cleanup pass. \******************************************************************************/ #define clnpass_step(fp, frowstep, dp, bitpos, one, orient, nmsedec, mqenc, label1, label2, vcausalflag) \ { \ jpc_fix_t f; \ label1 \ f = *(fp); \ if (!(f & (JPC_SIG | JPC_VISIT))) { \ jpc_mqenc_setcurctx(mqenc, JPC_GETZCCTXNO(f, (orient))); \ bool v = (JAS_ABS(*(dp)) & (one)) != 0; \ jpc_mqenc_putbit((mqenc), v); \ if (v) { \ label2 \ f = *(fp); \ /* Coefficient is significant. */ \ *(nmsedec) += JPC_GETSIGNMSEDEC(JAS_ABS(*(dp)), (bitpos) + JPC_NUMEXTRABITS); \ jpc_mqenc_setcurctx((mqenc), JPC_GETSCCTXNO(f)); \ v = ((*(dp) < 0) ? 1 : 0); \ jpc_mqenc_putbit((mqenc), v ^ JPC_GETSPB(f)); \ JPC_UPDATEFLAGS4((fp), (frowstep), v, vcausalflag); \ *(fp) |= JPC_SIG; \ } \ } \ *(fp) &= ~JPC_VISIT; \ } static int jpc_encclnpass(jpc_mqenc_t *mqenc, int bitpos, enum jpc_tsfb_orient orient, bool vcausalflag, bool segsymflag, jas_matrix_t *flags, const jas_matrix_t *data, int term, long *nmsedec) { int i; jpc_fix_t *fp; int one; jpc_fix_t *fstripestart; jpc_fix_t *fvscanstart; *nmsedec = 0; const unsigned width = jas_matrix_numcols(data); const unsigned height = jas_matrix_numrows(data); const unsigned frowstep = jas_matrix_rowstep(flags); const unsigned drowstep = jas_matrix_rowstep(data); const unsigned fstripestep = frowstep << 2; const unsigned dstripestep = drowstep << 2; one = 1 << (bitpos + JPC_NUMEXTRABITS); fstripestart = jas_matrix_getref(flags, 1, 1); const jpc_fix_t *dstripestart = jas_matrix_getref(data, 0, 0); for (i = height; i > 0; i -= 4, fstripestart += fstripestep, dstripestart += dstripestep) { fvscanstart = fstripestart; const jpc_fix_t *dvscanstart = dstripestart; const unsigned vscanlen = JAS_MIN(i, 4); for (unsigned j = width; j > 0; --j, ++fvscanstart, ++dvscanstart) { fp = fvscanstart; const jpc_fix_t *dp; unsigned k; if (vscanlen >= 4 && !((*fp) & (JPC_SIG | JPC_VISIT | JPC_OTHSIGMSK)) && (fp += frowstep, !((*fp) & (JPC_SIG | JPC_VISIT | JPC_OTHSIGMSK))) && (fp += frowstep, !((*fp) & (JPC_SIG | JPC_VISIT | JPC_OTHSIGMSK))) && (fp += frowstep, !((*fp) & (JPC_SIG | JPC_VISIT | JPC_OTHSIGMSK)))) { dp = dvscanstart; for (k = 0; k < vscanlen; ++k) { const bool v = (JAS_ABS(*dp) & one) != 0; if (v) { break; } dp += drowstep; } unsigned runlen = k; if (runlen >= 4) { jpc_mqenc_setcurctx(mqenc, JPC_AGGCTXNO); jpc_mqenc_putbit(mqenc, false); continue; } jpc_mqenc_setcurctx(mqenc, JPC_AGGCTXNO); jpc_mqenc_putbit(mqenc, true); jpc_mqenc_setcurctx(mqenc, JPC_UCTXNO); jpc_mqenc_putbit(mqenc, runlen >> 1); jpc_mqenc_putbit(mqenc, runlen & 1); fp = fvscanstart + frowstep * runlen; dp = dvscanstart + drowstep * runlen; k = vscanlen - runlen; switch (runlen) { case 0: goto clnpass_partial0; case 1: goto clnpass_partial1; case 2: goto clnpass_partial2; case 3: goto clnpass_partial3; } } else { fp = fvscanstart; dp = dvscanstart; k = vscanlen; goto clnpass_full0; } clnpass_step(fp, frowstep, dp, bitpos, one, orient, nmsedec, mqenc, clnpass_full0:, clnpass_partial0:, vcausalflag); if (--k <= 0) { continue; } fp += frowstep; dp += drowstep; clnpass_step(fp, frowstep, dp, bitpos, one, orient, nmsedec, mqenc, ;, clnpass_partial1:, 0); if (--k <= 0) { continue; } fp += frowstep; dp += drowstep; clnpass_step(fp, frowstep, dp, bitpos, one, orient, nmsedec, mqenc, ;, clnpass_partial2:, 0); if (--k <= 0) { continue; } fp += frowstep; dp += drowstep; clnpass_step(fp, frowstep, dp, bitpos, one, orient, nmsedec, mqenc, ;, clnpass_partial3:, 0); } } if (segsymflag) { jpc_mqenc_setcurctx(mqenc, JPC_UCTXNO); jpc_mqenc_putbit(mqenc, true); jpc_mqenc_putbit(mqenc, false); jpc_mqenc_putbit(mqenc, true); jpc_mqenc_putbit(mqenc, false); } if (term) { jpc_mqenc_flush(mqenc, term - 1); } return jpc_mqenc_error(mqenc) ? (-1) : 0; }