jpc_tsfb.c

/*
 * Copyright (c) 1999-2000 Image Power, Inc. and the University of
 *   British Columbia.
 * Copyright (c) 2001-2004 Michael David Adams.
 * All rights reserved.
 */

/* __START_OF_JASPER_LICENSE__
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 * JasPer License Version 2.0
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 * Copyright (c) 2001-2006 Michael David Adams
 * Copyright (c) 1999-2000 Image Power, Inc.
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/*
 * Tree-Structured Filter Bank (TSFB) Library
 *
 * $Id: jpc_tsfb.c,v 1.2 2008-05-26 09:40:52 vp153 Exp $
 */

/******************************************************************************\
* Includes.
\******************************************************************************/

#include <assert.h>

#include "jasper/jas_malloc.h"
#include "jasper/jas_seq.h"

#include "jpc_tsfb.h"
#include "jpc_cod.h"
#include "jpc_cs.h"
#include "jpc_util.h"
#include "jpc_math.h"

void jpc_tsfb_getbands2(jpc_tsfb_t *tsfb, int locxstart, int locystart,
  int xstart, int ystart, int xend, int yend, jpc_tsfb_band_t **bands,
  int numlvls);

/******************************************************************************\
*
\******************************************************************************/

jpc_tsfb_t *jpc_cod_gettsfb(int qmfbid, int numlvls)
{
    jpc_tsfb_t *tsfb;

    if (!(tsfb = malloc(sizeof(jpc_tsfb_t))))
        return 0;

    if (numlvls > 0) {
        switch (qmfbid) {
        case JPC_COX_INS:
            tsfb->qmfb = &jpc_ns_qmfb2d;
            break;
        default:
        case JPC_COX_RFT:
            tsfb->qmfb = &jpc_ft_qmfb2d;
            break;
        }
    } else {
        tsfb->qmfb = 0;
    }
    tsfb->numlvls = numlvls;
    return tsfb;
}

void jpc_tsfb_destroy(jpc_tsfb_t *tsfb)
{
    free(tsfb);
}

int jpc_tsfb_analyze(jpc_tsfb_t *tsfb, jas_seq2d_t *a)
{
    return (tsfb->numlvls > 0) ? jpc_tsfb_analyze2(tsfb, jas_seq2d_getref(a,
      jas_seq2d_xstart(a), jas_seq2d_ystart(a)), jas_seq2d_xstart(a),
      jas_seq2d_ystart(a), jas_seq2d_width(a),
      jas_seq2d_height(a), jas_seq2d_rowstep(a), tsfb->numlvls - 1) : 0;
}

int jpc_tsfb_analyze2(jpc_tsfb_t *tsfb, int *a, int xstart, int ystart,
  int width, int height, int stride, int numlvls)
{
    if (width > 0 && height > 0) {
        if ((*tsfb->qmfb->analyze)(a, xstart, ystart, width, height, stride))
            return -1;
        if (numlvls > 0) {
            if (jpc_tsfb_analyze2(tsfb, a, JPC_CEILDIVPOW2(xstart,
              1), JPC_CEILDIVPOW2(ystart, 1), JPC_CEILDIVPOW2(
              xstart + width, 1) - JPC_CEILDIVPOW2(xstart, 1),
              JPC_CEILDIVPOW2(ystart + height, 1) -
              JPC_CEILDIVPOW2(ystart, 1), stride, numlvls - 1)) {
                return -1;
            }
        }
    }
    return 0;
}

int jpc_tsfb_synthesize(jpc_tsfb_t *tsfb, jas_seq2d_t *a)
{
    return (tsfb->numlvls > 0) ? jpc_tsfb_synthesize2(tsfb,
      jas_seq2d_getref(a, jas_seq2d_xstart(a), jas_seq2d_ystart(a)),
      jas_seq2d_xstart(a), jas_seq2d_ystart(a), jas_seq2d_width(a),
      jas_seq2d_height(a), jas_seq2d_rowstep(a), tsfb->numlvls - 1) : 0;
}

int jpc_tsfb_synthesize2(jpc_tsfb_t *tsfb, int *a, int xstart, int ystart,
  int width, int height, int stride, int numlvls)
{
    if (numlvls > 0) {
        if (jpc_tsfb_synthesize2(tsfb, a, JPC_CEILDIVPOW2(xstart, 1),
          JPC_CEILDIVPOW2(ystart, 1), JPC_CEILDIVPOW2(xstart + width,
          1) - JPC_CEILDIVPOW2(xstart, 1), JPC_CEILDIVPOW2(ystart +
          height, 1) - JPC_CEILDIVPOW2(ystart, 1), stride, numlvls -
          1)) {
            return -1;
        }
    }
    if (width > 0 && height > 0) {
        if ((*tsfb->qmfb->synthesize)(a, xstart, ystart, width, height, stride)) {
            return -1;
        }
    }
    return 0;
}

int jpc_tsfb_getbands(jpc_tsfb_t *tsfb, uint_fast32_t xstart,
  uint_fast32_t ystart, uint_fast32_t xend, uint_fast32_t yend,
  jpc_tsfb_band_t *bands)
{
    jpc_tsfb_band_t *band;

    band = bands;
    if (tsfb->numlvls > 0) {
        jpc_tsfb_getbands2(tsfb, xstart, ystart, xstart, ystart, xend, yend,
          &band, tsfb->numlvls);
    } else {

        band->xstart = xstart;
        band->ystart = ystart;
        band->xend = xend;
        band->yend = yend;
        band->locxstart = xstart;
        band->locystart = ystart;
        band->locxend = band->locxstart + band->xend - band->xstart;
        band->locyend = band->locystart + band->yend - band->ystart;
        band->orient = JPC_TSFB_LL;
        band->synenergywt = JPC_FIX_ONE;
        ++band;
    }
    return band - bands;
}

void jpc_tsfb_getbands2(jpc_tsfb_t *tsfb, int locxstart, int locystart,
  int xstart, int ystart, int xend, int yend, jpc_tsfb_band_t **bands,
  int numlvls)
{
    int newxstart;
    int newystart;
    int newxend;
    int newyend;
    jpc_tsfb_band_t *band;

    newxstart = JPC_CEILDIVPOW2(xstart, 1);
    newystart = JPC_CEILDIVPOW2(ystart, 1);
    newxend = JPC_CEILDIVPOW2(xend, 1);
    newyend = JPC_CEILDIVPOW2(yend, 1);

    if (numlvls > 0) {

        jpc_tsfb_getbands2(tsfb, locxstart, locystart, newxstart, newystart,
          newxend, newyend, bands, numlvls - 1);

        band = *bands;
        band->xstart = JPC_FLOORDIVPOW2(xstart, 1);
        band->ystart = newystart;
        band->xend = JPC_FLOORDIVPOW2(xend, 1);
        band->yend = newyend;
        band->locxstart = locxstart + newxend - newxstart;
        band->locystart = locystart;
        band->locxend = band->locxstart + band->xend - band->xstart;
        band->locyend = band->locystart + band->yend - band->ystart;
        band->orient = JPC_TSFB_HL;
        band->synenergywt = jpc_dbltofix(tsfb->qmfb->hpenergywts[
          tsfb->numlvls - numlvls] * tsfb->qmfb->lpenergywts[
          tsfb->numlvls - numlvls]);
        ++(*bands);

        band = *bands;
        band->xstart = newxstart;
        band->ystart = JPC_FLOORDIVPOW2(ystart, 1);
        band->xend = newxend;
        band->yend = JPC_FLOORDIVPOW2(yend, 1);
        band->locxstart = locxstart;
        band->locystart = locystart + newyend - newystart;
        band->locxend = band->locxstart + band->xend - band->xstart;
        band->locyend = band->locystart + band->yend - band->ystart;
        band->orient = JPC_TSFB_LH;
        band->synenergywt = jpc_dbltofix(tsfb->qmfb->lpenergywts[
          tsfb->numlvls - numlvls] * tsfb->qmfb->hpenergywts[
          tsfb->numlvls - numlvls]);
        ++(*bands);

        band = *bands;
        band->xstart = JPC_FLOORDIVPOW2(xstart, 1);
        band->ystart = JPC_FLOORDIVPOW2(ystart, 1);
        band->xend = JPC_FLOORDIVPOW2(xend, 1);
        band->yend = JPC_FLOORDIVPOW2(yend, 1);
        band->locxstart = locxstart + newxend - newxstart;
        band->locystart = locystart + newyend - newystart;
        band->locxend = band->locxstart + band->xend - band->xstart;
        band->locyend = band->locystart + band->yend - band->ystart;
        band->orient = JPC_TSFB_HH;
        band->synenergywt = jpc_dbltofix(tsfb->qmfb->hpenergywts[
          tsfb->numlvls - numlvls] * tsfb->qmfb->hpenergywts[
          tsfb->numlvls - numlvls]);
        ++(*bands);

    } else {

        band = *bands;
        band->xstart = xstart;
        band->ystart = ystart;
        band->xend = xend;
        band->yend = yend;
        band->locxstart = locxstart;
        band->locystart = locystart;
        band->locxend = band->locxstart + band->xend - band->xstart;
        band->locyend = band->locystart + band->yend - band->ystart;
        band->orient = JPC_TSFB_LL;
        band->synenergywt = jpc_dbltofix(tsfb->qmfb->lpenergywts[
          tsfb->numlvls - numlvls - 1] * tsfb->qmfb->lpenergywts[
          tsfb->numlvls - numlvls - 1]);
        ++(*bands);

    }

}