示例#1
0
        internal static int _2inverse(Block vb, Object vl, float[][] fin, int ch)
        {
            int          i, k, l, s;
            LookResidue0 look = (LookResidue0 )vl;
            InfoResidue0 info = look.info;

            // move all this setup out later
            int samples_per_partition = info.grouping;
            int partitions_per_word   = look.phrasebook.dim;
            int n = info.end - info.begin;

            int partvals  = n / samples_per_partition;
            int partwords = (partvals + partitions_per_word - 1) / partitions_per_word;

            int[][] partword = new int[partwords][];
            for (s = 0; s < look.stages; s++)
            {
                for (i = 0, l = 0; i < partvals; l++)
                {
                    if (s == 0)
                    {
                        // fetch the partition word for each channel
                        int temp = look.phrasebook.decode(vb.opb);
                        if (temp == -1)
                        {
                            // goto eopbreak;
                            return(0);
                        }
                        partword[l] = look.decodemap[temp];
                        if (partword[l] == null)
                        {
                            // goto errout;
                            return(0);
                        }
                    }

                    // now we decode residual values for the partitions
                    for (k = 0; k < partitions_per_word && i < partvals; k++, i++)
                    {
                        int offset = info.begin + i * samples_per_partition;
                        if ((info.secondstages[partword[l][k]] & (1 << s)) != 0)
                        {
                            CodeBook stagebook = look.fullbooks[look.partbooks[partword[l][k]][s]];
                            if (stagebook != null)
                            {
                                if (stagebook.decodevv_add(fin, offset, ch, vb.opb, samples_per_partition) == -1)
                                {
                                    // goto errout;
                                    return(0);
                                }
                            }
                        }
                    }
                }
            }
            //  errout:
            //  eopbreak:
            return(0);
        }
示例#2
0
        override public Object look(DspState vd, InfoMode vm, Object vr)
        {
            InfoResidue0 info = (InfoResidue0)vr;
            LookResidue0 look = new LookResidue0();
            int          acc  = 0;
            int          dim;
            int          maxstage = 0;

            look.info = info;
            look.map  = vm.mapping;

            look.parts      = info.partitions;
            look.fullbooks  = vd.fullbooks;
            look.phrasebook = vd.fullbooks[info.groupbook];

            dim = look.phrasebook.dim;

            look.partbooks = new int[look.parts][];

            for (int j = 0; j < look.parts; j++)
            {
                int stages = ilog(info.secondstages[j]);
                if (stages != 0)
                {
                    if (stages > maxstage)
                    {
                        maxstage = stages;
                    }
                    look.partbooks[j] = new int[stages];
                    for (int k = 0; k < stages; k++)
                    {
                        if ((info.secondstages[j] & (1 << k)) != 0)
                        {
                            look.partbooks[j][k] = info.booklist[acc++];
                        }
                    }
                }
            }

            look.partvals  = (int)Math.Round(Math.Pow(look.parts, dim));
            look.stages    = maxstage;
            look.decodemap = new int[look.partvals][];
            for (int j = 0; j < look.partvals; j++)
            {
                int val  = j;
                int mult = look.partvals / look.parts;
                look.decodemap[j] = new int[dim];

                for (int k = 0; k < dim; k++)
                {
                    int deco = val / mult;
                    val  -= deco * mult;
                    mult /= look.parts;
                    look.decodemap[j][k] = deco;
                }
            }
            return(look);
        }
示例#3
0
        internal static int _01inverse(Block vb, Object vl, float[][] fin, int ch, int decodepart)
        {
            {
                int          i, j, k, l, s;
                LookResidue0 look = (LookResidue0 )vl;
                InfoResidue0 info = look.info;

                // move all this setup out later
                int samples_per_partition = info.grouping;
                int partitions_per_word   = look.phrasebook.dim;
                int n = info.end - info.begin;

                int partvals  = n / samples_per_partition;
                int partwords = (partvals + partitions_per_word - 1) / partitions_per_word;

                if (partword.Length < ch)
                {
                    partword = new int[ch][][];
                    for (j = 0; j < ch; j++)
                    {
                        partword[j] = new int[partwords][];
                    }
                }
                else
                {
                    for (j = 0; j < ch; j++)
                    {
                        if (partword[j] == null || partword[j].Length < partwords)
                        {
                            partword[j] = new int[partwords][];
                        }
                    }
                }

                for (s = 0; s < look.stages; s++)
                {
                    // each loop decodes on partition codeword containing
                    // partitions_pre_word partitions
                    for (i = 0, l = 0; i < partvals; l++)
                    {
                        if (s == 0)
                        {
                            // fetch the partition word for each channel
                            for (j = 0; j < ch; j++)
                            {
                                int temp = look.phrasebook.decode(vb.opb);
                                if (temp == -1)
                                {
                                    //goto eopbreak;
                                    return(0);
                                }
                                partword[j][l] = look.decodemap[temp];
                                if (partword[j][l] == null)
                                {
                                    //	      goto errout;
                                    return(0);
                                }
                            }
                        }

                        // now we decode residual values for the partitions
                        for (k = 0; k < partitions_per_word && i < partvals; k++, i++)
                        {
                            for (j = 0; j < ch; j++)
                            {
                                int offset = info.begin + i * samples_per_partition;
                                if ((info.secondstages[partword[j][l][k]] & (1 << s)) != 0)
                                {
                                    CodeBook stagebook = look.fullbooks[look.partbooks[partword[j][l][k]][s]];
                                    //	      CodeBook stagebook=look.partbooks[partword[j][l][k]][s];
                                    if (stagebook != null)
                                    {
                                        if (decodepart == 0)
                                        {
                                            if (stagebook.decodevs_add(fin[j], offset, vb.opb, samples_per_partition) == -1)
                                            {
                                                // goto errout;
                                                return(0);
                                            }
                                        }
                                        else if (decodepart == 1)
                                        {
                                            if (stagebook.decodev_add(fin[j], offset, vb.opb, samples_per_partition) == -1)
                                            {
                                                // goto errout;
                                                return(0);
                                            }
                                        }
                                    }
                                }
                            }
                        }
                    }
                }
                return(0);
            }
        }