656 lines
21 KiB
C
656 lines
21 KiB
C
/*
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* Copyright (c) 1999-2000 Image Power, Inc. and the University of
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* British Columbia.
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* Copyright (c) 2001-2003 Michael David Adams.
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* All rights reserved.
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*/
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/* __START_OF_JASPER_LICENSE__
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*
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* JasPer License Version 2.0
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*
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* Copyright (c) 2001-2006 Michael David Adams
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* Copyright (c) 1999-2000 Image Power, Inc.
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* Copyright (c) 1999-2000 The University of British Columbia
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*
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* All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person (the
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* "User") obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without restriction,
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* including without limitation the rights to use, copy, modify, merge,
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* publish, distribute, and/or sell copies of the Software, and to permit
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* persons to whom the Software is furnished to do so, subject to the
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* following conditions:
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*
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* 1. The above copyright notices and this permission notice (which
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* includes the disclaimer below) shall be included in all copies or
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* substantial portions of the Software.
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*
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* 2. The name of a copyright holder shall not be used to endorse or
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* promote products derived from the Software without specific prior
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* written permission.
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*
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* THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS
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* LICENSE. NO USE OF THE SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER
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* THIS DISCLAIMER. THE SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS
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* "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
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* BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
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* PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. IN NO
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* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
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* INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
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* FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
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* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
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* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. NO ASSURANCES ARE
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* PROVIDED BY THE COPYRIGHT HOLDERS THAT THE SOFTWARE DOES NOT INFRINGE
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* THE PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OF ANY OTHER ENTITY.
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* EACH COPYRIGHT HOLDER DISCLAIMS ANY LIABILITY TO THE USER FOR CLAIMS
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* BROUGHT BY ANY OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL
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* PROPERTY RIGHTS OR OTHERWISE. AS A CONDITION TO EXERCISING THE RIGHTS
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* GRANTED HEREUNDER, EACH USER HEREBY ASSUMES SOLE RESPONSIBILITY TO SECURE
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* ANY OTHER INTELLECTUAL PROPERTY RIGHTS NEEDED, IF ANY. THE SOFTWARE
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* IS NOT FAULT-TOLERANT AND IS NOT INTENDED FOR USE IN MISSION-CRITICAL
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* SYSTEMS, SUCH AS THOSE USED IN THE OPERATION OF NUCLEAR FACILITIES,
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* AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL
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* SYSTEMS, DIRECT LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH
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* THE FAILURE OF THE SOFTWARE OR SYSTEM COULD LEAD DIRECTLY TO DEATH,
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* PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH
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* RISK ACTIVITIES"). THE COPYRIGHT HOLDERS SPECIFICALLY DISCLAIM ANY
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* EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES.
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*
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* __END_OF_JASPER_LICENSE__
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*/
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/*
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* Tier 2 Encoder
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*
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* $Id: jpc_t2enc.c,v 1.2 2008-05-26 09:40:52 vp153 Exp $
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*/
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/******************************************************************************\
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* Includes.
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\******************************************************************************/
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#include <stdio.h>
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#include <stdlib.h>
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#include <assert.h>
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#include "jasper/jas_fix.h"
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#include "jasper/jas_malloc.h"
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#include "jasper/jas_math.h"
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#include "jasper/jas_debug.h"
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#include "jpc_flt.h"
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#include "jpc_t2enc.h"
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#include "jpc_t2cod.h"
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#include "jpc_tagtree.h"
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#include "jpc_enc.h"
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#include "jpc_math.h"
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/******************************************************************************\
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* Code.
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\******************************************************************************/
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static int jpc_putcommacode(jpc_bitstream_t *out, int n)
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{
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assert(n >= 0);
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while (--n >= 0) {
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if (jpc_bitstream_putbit(out, 1) == EOF) {
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return -1;
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}
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}
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if (jpc_bitstream_putbit(out, 0) == EOF) {
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return -1;
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}
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return 0;
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}
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static int jpc_putnumnewpasses(jpc_bitstream_t *out, int n)
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{
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int ret;
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if (n <= 0) {
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return -1;
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} else if (n == 1) {
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ret = jpc_bitstream_putbit(out, 0);
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} else if (n == 2) {
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ret = jpc_bitstream_putbits(out, 2, 2);
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} else if (n <= 5) {
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ret = jpc_bitstream_putbits(out, 4, 0xc | (n - 3));
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} else if (n <= 36) {
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ret = jpc_bitstream_putbits(out, 9, 0x1e0 | (n - 6));
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} else if (n <= 164) {
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ret = jpc_bitstream_putbits(out, 16, 0xff80 | (n - 37));
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} else {
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/* The standard has no provision for encoding a larger value.
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In practice, however, it is highly unlikely that this
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limitation will ever be encountered. */
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return -1;
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}
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return (ret != EOF) ? 0 : (-1);
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}
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int jpc_enc_encpkts(jpc_enc_t *enc, jas_stream_t *out)
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{
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jpc_enc_tile_t *tile;
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jpc_pi_t *pi;
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tile = enc->curtile;
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jpc_init_t2state(enc, 0);
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pi = tile->pi;
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jpc_pi_init(pi);
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if (!jpc_pi_next(pi)) {
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for (;;) {
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if (jpc_enc_encpkt(enc, out, jpc_pi_cmptno(pi), jpc_pi_rlvlno(pi),
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jpc_pi_prcno(pi), jpc_pi_lyrno(pi))) {
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return -1;
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}
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if (jpc_pi_next(pi)) {
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break;
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}
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}
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}
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return 0;
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}
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int jpc_enc_encpkt(jpc_enc_t *enc, jas_stream_t *out, int compno, int lvlno, int prcno, int lyrno)
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{
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jpc_enc_tcmpt_t *comp;
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jpc_enc_rlvl_t *lvl;
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jpc_enc_band_t *band;
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jpc_enc_band_t *endbands;
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jpc_enc_cblk_t *cblk;
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jpc_enc_cblk_t *endcblks;
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jpc_bitstream_t *outb;
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jpc_enc_pass_t *pass;
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jpc_enc_pass_t *startpass;
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jpc_enc_pass_t *lastpass;
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jpc_enc_pass_t *endpass;
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jpc_enc_pass_t *endpasses;
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int i;
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int included;
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int ret;
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jpc_tagtreenode_t *leaf;
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int n;
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int t1;
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int t2;
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int adjust;
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int maxadjust;
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int datalen;
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int numnewpasses;
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int passcount;
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jpc_enc_tile_t *tile;
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jpc_enc_prc_t *prc;
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jpc_enc_cp_t *cp;
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jpc_ms_t *ms;
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tile = enc->curtile;
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cp = enc->cp;
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if (cp->tcp.csty & JPC_COD_SOP) {
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if (!(ms = jpc_ms_create(JPC_MS_SOP))) {
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return -1;
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}
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ms->parms.sop.seqno = jpc_pi_getind(tile->pi);
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if (jpc_putms(out, enc->cstate, ms)) {
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return -1;
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}
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jpc_ms_destroy(ms);
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}
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outb = jpc_bitstream_sopen(out, "w+");
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assert(outb);
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if (jpc_bitstream_putbit(outb, 1) == EOF) {
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return -1;
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}
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JAS_DBGLOG(10, ("\n"));
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JAS_DBGLOG(10, ("present. "));
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comp = &tile->tcmpts[compno];
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lvl = &comp->rlvls[lvlno];
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endbands = &lvl->bands[lvl->numbands];
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for (band = lvl->bands; band != endbands; ++band) {
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if (!band->data) {
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continue;
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}
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prc = &band->prcs[prcno];
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if (!prc->cblks) {
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continue;
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}
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endcblks = &prc->cblks[prc->numcblks];
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for (cblk = prc->cblks; cblk != endcblks; ++cblk) {
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if (!lyrno) {
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leaf = jpc_tagtree_getleaf(prc->nlibtree, cblk - prc->cblks);
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jpc_tagtree_setvalue(prc->nlibtree, leaf, cblk->numimsbs);
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}
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pass = cblk->curpass;
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included = (pass && pass->lyrno == lyrno);
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if (included && (!cblk->numencpasses)) {
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assert(pass->lyrno == lyrno);
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leaf = jpc_tagtree_getleaf(prc->incltree,
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cblk - prc->cblks);
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jpc_tagtree_setvalue(prc->incltree, leaf, pass->lyrno);
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}
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}
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endcblks = &prc->cblks[prc->numcblks];
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for (cblk = prc->cblks; cblk != endcblks; ++cblk) {
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pass = cblk->curpass;
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included = (pass && pass->lyrno == lyrno);
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if (!cblk->numencpasses) {
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leaf = jpc_tagtree_getleaf(prc->incltree,
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cblk - prc->cblks);
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if (jpc_tagtree_encode(prc->incltree, leaf, lyrno
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+ 1, outb) < 0) {
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return -1;
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}
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} else {
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if (jpc_bitstream_putbit(outb, included) == EOF) {
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return -1;
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}
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}
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JAS_DBGLOG(10, ("included=%d ", included));
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if (!included) {
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continue;
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}
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if (!cblk->numencpasses) {
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i = 1;
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leaf = jpc_tagtree_getleaf(prc->nlibtree, cblk - prc->cblks);
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for (;;) {
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if ((ret = jpc_tagtree_encode(prc->nlibtree, leaf, i, outb)) < 0) {
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return -1;
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}
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if (ret) {
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break;
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}
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++i;
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}
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assert(leaf->known_ && i == leaf->value_ + 1);
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}
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endpasses = &cblk->passes[cblk->numpasses];
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startpass = pass;
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endpass = startpass;
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while (endpass != endpasses && endpass->lyrno == lyrno){
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++endpass;
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}
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numnewpasses = endpass - startpass;
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if (jpc_putnumnewpasses(outb, numnewpasses)) {
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return -1;
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}
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JAS_DBGLOG(10, ("numnewpasses=%d ", numnewpasses));
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lastpass = endpass - 1;
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n = startpass->start;
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passcount = 1;
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maxadjust = 0;
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for (pass = startpass; pass != endpass; ++pass) {
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if (pass->term || pass == lastpass) {
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datalen = pass->end - n;
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t1 = jpc_firstone(datalen) + 1;
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t2 = cblk->numlenbits + jpc_floorlog2(passcount);
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adjust = JAS_MAX(t1 - t2, 0);
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maxadjust = JAS_MAX(adjust, maxadjust);
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n += datalen;
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passcount = 1;
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} else {
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++passcount;
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}
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}
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if (jpc_putcommacode(outb, maxadjust)) {
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return -1;
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}
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cblk->numlenbits += maxadjust;
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lastpass = endpass - 1;
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n = startpass->start;
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passcount = 1;
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for (pass = startpass; pass != endpass; ++pass) {
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if (pass->term || pass == lastpass) {
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datalen = pass->end - n;
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assert(jpc_firstone(datalen) < cblk->numlenbits + jpc_floorlog2(passcount));
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if (jpc_bitstream_putbits(outb, cblk->numlenbits + jpc_floorlog2(passcount), datalen) == EOF) {
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return -1;
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}
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n += datalen;
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passcount = 1;
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} else {
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++passcount;
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}
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}
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}
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}
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jpc_bitstream_outalign(outb, 0);
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jpc_bitstream_close(outb);
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if (cp->tcp.csty & JPC_COD_EPH) {
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if (!(ms = jpc_ms_create(JPC_MS_EPH))) {
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return -1;
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}
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jpc_putms(out, enc->cstate, ms);
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jpc_ms_destroy(ms);
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}
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comp = &tile->tcmpts[compno];
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lvl = &comp->rlvls[lvlno];
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endbands = &lvl->bands[lvl->numbands];
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for (band = lvl->bands; band != endbands; ++band) {
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if (!band->data) {
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continue;
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}
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prc = &band->prcs[prcno];
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if (!prc->cblks) {
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continue;
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}
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endcblks = &prc->cblks[prc->numcblks];
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for (cblk = prc->cblks; cblk != endcblks; ++cblk) {
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pass = cblk->curpass;
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if (!pass) {
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continue;
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}
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if (pass->lyrno != lyrno) {
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assert(pass->lyrno < 0 || pass->lyrno > lyrno);
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continue;
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}
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endpasses = &cblk->passes[cblk->numpasses];
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startpass = pass;
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endpass = startpass;
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while (endpass != endpasses && endpass->lyrno == lyrno){
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++endpass;
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}
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lastpass = endpass - 1;
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numnewpasses = endpass - startpass;
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jas_stream_seek(cblk->stream, startpass->start, SEEK_SET);
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assert(jas_stream_tell(cblk->stream) == startpass->start);
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if (jas_stream_copy(out, cblk->stream, lastpass->end - startpass->start)) {
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return -1;
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}
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cblk->curpass = (endpass != endpasses) ? endpass : 0;
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cblk->numencpasses += numnewpasses;
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}
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}
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return 0;
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}
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void jpc_save_t2state(jpc_enc_t *enc)
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{
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/* stream pos in embedded T1 stream may be wrong since not saved/restored! */
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jpc_enc_tcmpt_t *comp;
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jpc_enc_tcmpt_t *endcomps;
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jpc_enc_rlvl_t *lvl;
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jpc_enc_rlvl_t *endlvls;
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jpc_enc_band_t *band;
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jpc_enc_band_t *endbands;
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jpc_enc_cblk_t *cblk;
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jpc_enc_cblk_t *endcblks;
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jpc_enc_tile_t *tile;
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int prcno;
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jpc_enc_prc_t *prc;
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tile = enc->curtile;
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endcomps = &tile->tcmpts[tile->numtcmpts];
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for (comp = tile->tcmpts; comp != endcomps; ++comp) {
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endlvls = &comp->rlvls[comp->numrlvls];
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for (lvl = comp->rlvls; lvl != endlvls; ++lvl) {
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if (!lvl->bands) {
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continue;
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}
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endbands = &lvl->bands[lvl->numbands];
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for (band = lvl->bands; band != endbands; ++band) {
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if (!band->data) {
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continue;
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}
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for (prcno = 0, prc = band->prcs; prcno < lvl->numprcs; ++prcno, ++prc) {
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if (!prc->cblks) {
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continue;
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}
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jpc_tagtree_copy(prc->savincltree, prc->incltree);
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jpc_tagtree_copy(prc->savnlibtree, prc->nlibtree);
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endcblks = &prc->cblks[prc->numcblks];
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for (cblk = prc->cblks; cblk != endcblks; ++cblk) {
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cblk->savedcurpass = cblk->curpass;
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cblk->savednumencpasses = cblk->numencpasses;
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cblk->savednumlenbits = cblk->numlenbits;
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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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void jpc_restore_t2state(jpc_enc_t *enc)
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{
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jpc_enc_tcmpt_t *comp;
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jpc_enc_tcmpt_t *endcomps;
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jpc_enc_rlvl_t *lvl;
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jpc_enc_rlvl_t *endlvls;
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jpc_enc_band_t *band;
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jpc_enc_band_t *endbands;
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jpc_enc_cblk_t *cblk;
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jpc_enc_cblk_t *endcblks;
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jpc_enc_tile_t *tile;
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int prcno;
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jpc_enc_prc_t *prc;
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tile = enc->curtile;
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endcomps = &tile->tcmpts[tile->numtcmpts];
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for (comp = tile->tcmpts; comp != endcomps; ++comp) {
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endlvls = &comp->rlvls[comp->numrlvls];
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for (lvl = comp->rlvls; lvl != endlvls; ++lvl) {
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if (!lvl->bands) {
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continue;
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}
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endbands = &lvl->bands[lvl->numbands];
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for (band = lvl->bands; band != endbands; ++band) {
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if (!band->data) {
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continue;
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}
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for (prcno = 0, prc = band->prcs; prcno < lvl->numprcs; ++prcno, ++prc) {
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if (!prc->cblks) {
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continue;
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}
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jpc_tagtree_copy(prc->incltree, prc->savincltree);
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jpc_tagtree_copy(prc->nlibtree, prc->savnlibtree);
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endcblks = &prc->cblks[prc->numcblks];
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for (cblk = prc->cblks; cblk != endcblks; ++cblk) {
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cblk->curpass = cblk->savedcurpass;
|
|
cblk->numencpasses = cblk->savednumencpasses;
|
|
cblk->numlenbits = cblk->savednumlenbits;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void jpc_init_t2state(jpc_enc_t *enc, int raflag)
|
|
{
|
|
/* It is assumed that band->numbps and cblk->numbps precomputed */
|
|
|
|
jpc_enc_tcmpt_t *comp;
|
|
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_enc_pass_t *pass;
|
|
jpc_enc_pass_t *endpasses;
|
|
jpc_tagtreenode_t *leaf;
|
|
jpc_enc_tile_t *tile;
|
|
int prcno;
|
|
jpc_enc_prc_t *prc;
|
|
|
|
tile = enc->curtile;
|
|
|
|
endcomps = &tile->tcmpts[tile->numtcmpts];
|
|
for (comp = tile->tcmpts; comp != endcomps; ++comp) {
|
|
endlvls = &comp->rlvls[comp->numrlvls];
|
|
for (lvl = comp->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;
|
|
}
|
|
jpc_tagtree_reset(prc->incltree);
|
|
jpc_tagtree_reset(prc->nlibtree);
|
|
endcblks = &prc->cblks[prc->numcblks];
|
|
for (cblk = prc->cblks; cblk != endcblks; ++cblk) {
|
|
if (jas_stream_rewind(cblk->stream)) {
|
|
assert(0);
|
|
}
|
|
cblk->curpass = (cblk->numpasses > 0) ? cblk->passes : 0;
|
|
cblk->numencpasses = 0;
|
|
cblk->numlenbits = 3;
|
|
cblk->numimsbs = band->numbps - cblk->numbps;
|
|
assert(cblk->numimsbs >= 0);
|
|
leaf = jpc_tagtree_getleaf(prc->nlibtree, cblk - prc->cblks);
|
|
jpc_tagtree_setvalue(prc->nlibtree, leaf, cblk->numimsbs);
|
|
|
|
if (raflag) {
|
|
endpasses = &cblk->passes[cblk->numpasses];
|
|
for (pass = cblk->passes; pass != endpasses; ++pass) {
|
|
pass->lyrno = -1;
|
|
pass->lyrno = 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
jpc_pi_t *jpc_enc_pi_create(jpc_enc_cp_t *cp, jpc_enc_tile_t *tile)
|
|
{
|
|
jpc_pi_t *pi;
|
|
int compno;
|
|
jpc_picomp_t *picomp;
|
|
jpc_pirlvl_t *pirlvl;
|
|
jpc_enc_tcmpt_t *tcomp;
|
|
int rlvlno;
|
|
jpc_enc_rlvl_t *rlvl;
|
|
int prcno;
|
|
int *prclyrno;
|
|
|
|
if (!(pi = jpc_pi_create0())) {
|
|
return 0;
|
|
}
|
|
pi->pktno = -1;
|
|
pi->numcomps = cp->numcmpts;
|
|
if (!(pi->picomps = jas_alloc2(pi->numcomps, sizeof(jpc_picomp_t)))) {
|
|
jpc_pi_destroy(pi);
|
|
return 0;
|
|
}
|
|
for (compno = 0, picomp = pi->picomps; compno < pi->numcomps; ++compno,
|
|
++picomp) {
|
|
picomp->pirlvls = 0;
|
|
}
|
|
|
|
for (compno = 0, tcomp = tile->tcmpts, picomp = pi->picomps;
|
|
compno < pi->numcomps; ++compno, ++tcomp, ++picomp) {
|
|
picomp->numrlvls = tcomp->numrlvls;
|
|
if (!(picomp->pirlvls = jas_alloc2(picomp->numrlvls,
|
|
sizeof(jpc_pirlvl_t)))) {
|
|
jpc_pi_destroy(pi);
|
|
return 0;
|
|
}
|
|
for (rlvlno = 0, pirlvl = picomp->pirlvls; rlvlno <
|
|
picomp->numrlvls; ++rlvlno, ++pirlvl) {
|
|
pirlvl->prclyrnos = 0;
|
|
}
|
|
for (rlvlno = 0, pirlvl = picomp->pirlvls, rlvl = tcomp->rlvls;
|
|
rlvlno < picomp->numrlvls; ++rlvlno, ++pirlvl, ++rlvl) {
|
|
/* XXX sizeof(long) should be sizeof different type */
|
|
pirlvl->numprcs = rlvl->numprcs;
|
|
if (rlvl->numprcs) {
|
|
if (!(pirlvl->prclyrnos = jas_alloc2(pirlvl->numprcs,
|
|
sizeof(long)))) {
|
|
jpc_pi_destroy(pi);
|
|
return 0;
|
|
}
|
|
} else {
|
|
pirlvl->prclyrnos = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
pi->maxrlvls = 0;
|
|
for (compno = 0, tcomp = tile->tcmpts, picomp = pi->picomps;
|
|
compno < pi->numcomps; ++compno, ++tcomp, ++picomp) {
|
|
picomp->hsamp = cp->ccps[compno].sampgrdstepx;
|
|
picomp->vsamp = cp->ccps[compno].sampgrdstepy;
|
|
for (rlvlno = 0, pirlvl = picomp->pirlvls, rlvl = tcomp->rlvls;
|
|
rlvlno < picomp->numrlvls; ++rlvlno, ++pirlvl, ++rlvl) {
|
|
pirlvl->prcwidthexpn = rlvl->prcwidthexpn;
|
|
pirlvl->prcheightexpn = rlvl->prcheightexpn;
|
|
for (prcno = 0, prclyrno = pirlvl->prclyrnos;
|
|
prcno < pirlvl->numprcs; ++prcno, ++prclyrno) {
|
|
*prclyrno = 0;
|
|
}
|
|
pirlvl->numhprcs = rlvl->numhprcs;
|
|
}
|
|
if (pi->maxrlvls < tcomp->numrlvls) {
|
|
pi->maxrlvls = tcomp->numrlvls;
|
|
}
|
|
}
|
|
|
|
pi->numlyrs = tile->numlyrs;
|
|
pi->xstart = tile->tlx;
|
|
pi->ystart = tile->tly;
|
|
pi->xend = tile->brx;
|
|
pi->yend = tile->bry;
|
|
|
|
pi->picomp = 0;
|
|
pi->pirlvl = 0;
|
|
pi->x = 0;
|
|
pi->y = 0;
|
|
pi->compno = 0;
|
|
pi->rlvlno = 0;
|
|
pi->prcno = 0;
|
|
pi->lyrno = 0;
|
|
pi->xstep = 0;
|
|
pi->ystep = 0;
|
|
|
|
pi->pchgno = -1;
|
|
|
|
pi->defaultpchg.prgord = tile->prg;
|
|
pi->defaultpchg.compnostart = 0;
|
|
pi->defaultpchg.compnoend = pi->numcomps;
|
|
pi->defaultpchg.rlvlnostart = 0;
|
|
pi->defaultpchg.rlvlnoend = pi->maxrlvls;
|
|
pi->defaultpchg.lyrnoend = pi->numlyrs;
|
|
pi->pchg = 0;
|
|
|
|
pi->valid = 0;
|
|
|
|
return pi;
|
|
}
|