Example usage for com.google.gwt.typedarrays.shared Int8Array get

Introduction

In this page you can find the example usage for com.google.gwt.typedarrays.shared Int8Array get.

Prototype

byte get(int index);

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Document

Retrieve one element of this view.

Usage

From source file:com.lizardtech.djvu.IWCodec.java

License:Open Source License

/**
 * DOCUMENT ME!// w  w w  .  j av  a 2 s.  c om
 *
 * @param zp DOCUMENT ME!
 * @param bit DOCUMENT ME!
 * @param band DOCUMENT ME!
 * @param blk DOCUMENT ME!
 * @param fbucket DOCUMENT ME!
 * @param nbucket DOCUMENT ME!
 *
 * @throws IOException DOCUMENT ME!
 */
void decode_buckets(ZPCodec zp, int bit, int band, IWBlock blk, int fbucket, int nbucket) throws IOException {
    int thres = quant_hi.get(band);
    int bbstate = 0;
    Int8Array cstate = coeffstate;
    int cidx = 0;

    for (int buckno = 0; buckno < nbucket;) {
        int bstatetmp = 0;
        Block pcoeff = blk.getBlock(fbucket + buckno);

        if (pcoeff == null) {
            bstatetmp = 8;
        } else {
            for (int i = 0; i < 16; i++) {
                int cstatetmp = cstate.get(cidx + i) & 1;
                if (cstatetmp == 0) {
                    cstatetmp = pcoeff.get(i) != 0 ? 2 : 8;
                    cstate.set(cidx + i, cstatetmp);
                }
                bstatetmp |= cstatetmp;
            }
        }

        bucketstate.set(buckno, bstatetmp);
        bbstate |= bstatetmp;
        buckno++;
        cidx += 16;
    }

    if ((nbucket < 16) || ((bbstate & 2) != 0)) {
        bbstate |= 4;
    } else if ((bbstate & 8) != 0) {
        if (zp.decoder(ctxRoot) != 0) {
            bbstate |= 4;
        }
    }

    if ((bbstate & 4) != 0) {
        for (int buckno = 0; buckno < nbucket; buckno++) {
            if ((bucketstate.get(buckno) & 8) != 0) {
                int ctx = 0;

                if (!DjVuOptions.NOCTX_BUCKET_UPPER && (band > 0)) {
                    int k = (fbucket + buckno) << 2;
                    Block b = blk.getBlock(k >> 4);

                    if (b != null) {
                        k &= 0xf;

                        if (b.get(k) != 0) {
                            ctx++;
                        }

                        if (b.get(k + 1) != 0) {
                            ctx++;
                        }

                        if (b.get(k + 2) != 0) {
                            ctx++;
                        }

                        if ((ctx < 3) && (b.get(k + 3) != 0)) {
                            ctx++;
                        }
                    }
                }

                if (!DjVuOptions.NOCTX_BUCKET_ACTIVE && ((bbstate & 2) != 0)) {
                    ctx |= 4;
                }

                if (zp.decoder(ctxBucket[band][ctx]) != 0) {
                    bucketstate.set(buckno, bucketstate.get(buckno) | 4);
                }
            }
        }
    }

    if ((bbstate & 4) != 0) {
        cstate = coeffstate;
        cidx = 0;

        for (int buckno = 0; buckno < nbucket;) {
            if ((bucketstate.get(buckno) & 4) != 0) {
                Block pcoeff = blk.getBlock(fbucket + buckno);

                if (pcoeff == null) {
                    pcoeff = blk.getInitializedBlock(fbucket + buckno);

                    for (int i = 0; i < 16; i++) {
                        if ((cstate.get(cidx + i) & 1) == 0) {
                            cstate.set(cidx + i, 8);
                        }
                    }
                }

                int gotcha = 0;
                int maxgotcha = 7;

                if (!DjVuOptions.NOCTX_EXPECT) {
                    for (int i = 0; i < 16; i++) {
                        if ((cstate.get(cidx + i) & 8) != 0) {
                            gotcha++;
                        }
                    }
                }

                for (int i = 0; i < 16; i++) {
                    if ((cstate.get(cidx + i) & 8) != 0) {
                        if (band == 0) {
                            thres = quant_lo.get(i);
                        }

                        int ctx = 0;

                        if (!DjVuOptions.NOCTX_EXPECT) {
                            if (gotcha >= maxgotcha) {
                                ctx = maxgotcha;
                            } else {
                                ctx = gotcha;
                            }
                        }

                        if (!DjVuOptions.NOCTX_ACTIVE && ((bucketstate.get(buckno) & 2) != 0)) {
                            ctx |= 8;
                        }

                        if (zp.decoder(ctxStart[ctx]) != 0) {
                            cstate.set(cidx + i, cstate.get(cidx + i) | 4);

                            int halfthres = thres >> 1;
                            int coeff = (thres + halfthres) - (halfthres >> 2);

                            if (zp.IWdecoder() != 0) {
                                pcoeff.set(i, (short) (-coeff));
                            } else {
                                pcoeff.set(i, (short) coeff);
                            }
                        }

                        if (!DjVuOptions.NOCTX_EXPECT) {
                            if ((cstate.get(cidx + i) & 4) != 0) {
                                gotcha = 0;
                            } else if (gotcha > 0) {
                                gotcha--;
                            }
                        }
                    }
                }
            }

            buckno++;
            cidx += 16;
        }
    }

    if ((bbstate & 2) != 0) {
        cstate = coeffstate;
        cidx = 0;

        for (int buckno = 0; buckno < nbucket;) {
            if ((bucketstate.get(buckno) & 2) != 0) {
                Block pcoeff = blk.getBlock(fbucket + buckno);

                for (int i = 0; i < 16; i++) {
                    if ((cstate.get(cidx + i) & 2) != 0) {
                        int coeff = pcoeff.get(i);

                        if (coeff < 0) {
                            coeff = -coeff;
                        }

                        if (band == 0) {
                            thres = quant_lo.get(i);
                        }

                        if (coeff <= (3 * thres)) {
                            coeff += (thres >> 2);

                            if (zp.decoder(ctxMant) != 0) {
                                coeff += (thres >> 1);
                            } else {
                                coeff = (coeff - thres) + (thres >> 1);
                            }
                        } else {
                            if (zp.IWdecoder() != 0) {
                                coeff += (thres >> 1);
                            } else {
                                coeff = (coeff - thres) + (thres >> 1);
                            }
                        }

                        if (pcoeff.get(i) > 0) {
                            pcoeff.set(i, (short) coeff);
                        } else {
                            pcoeff.set(i, (short) (-coeff));
                        }
                    }
                }
            }

            buckno++;
            cidx += 16;
        }
    }
}

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