internal Object copy_info()
{
InfoFloor1 info = this;
InfoFloor1 ret = new InfoFloor1();
ret.Partitions = info.Partitions;
Array.Copy(info.Partitionclass, 0, ret.Partitionclass, 0, VIF_PARTS);
Array.Copy(info.class_dim, 0, ret.class_dim, 0, VIF_CLASS);
Array.Copy(info.class_subs, 0, ret.class_subs, 0, VIF_CLASS);
Array.Copy(info.class_book, 0, ret.class_book, 0, VIF_CLASS);
for (int j = 0; j < VIF_CLASS; j++)
{
Array.Copy(info.class_subbook[j], 0, ret.class_subbook[j], 0, 8);
}
ret.mult = info.mult;
Array.Copy(info.postlist, 0, ret.postlist, 0, VIF_POSIT + 2);
ret.maxover = info.maxover;
ret.maxunder = info.maxunder;
ret.maxerr = info.maxerr;
ret.twofitminsize = info.twofitminsize;
ret.twofitminused = info.twofitminused;
ret.twofitweight = info.twofitweight;
ret.twofitatten = info.twofitatten;
ret.unusedminsize = info.unusedminsize;
ret.unusedmin_n = info.unusedmin_n;
ret.n = info.n;
return(ret);
}
override internal void pack(Object i, NVorbis.Ogg.BBuffer opb)
{
InfoFloor1 info = (InfoFloor1)i;
int count = 0;
int rangebits;
int maxposit = info.postlist[1];
int maxclass = -1;
/* save out partitions */
opb.Write(info.Partitions, 5); /* only 0 to 31 legal */
for (int j = 0; j < info.Partitions; j++)
{
opb.Write(info.Partitionclass[j], 4); /* only 0 to 15 legal */
if (maxclass < info.Partitionclass[j])
{
maxclass = info.Partitionclass[j];
}
}
/* save out partition classes */
for (int j = 0; j < maxclass + 1; j++)
{
opb.Write(info.class_dim[j] - 1, 3); /* 1 to 8 */
opb.Write(info.class_subs[j], 2); /* 0 to 3 */
if (info.class_subs[j] != 0)
{
opb.Write(info.class_book[j], 8);
}
for (int k = 0; k < (1 << info.class_subs[j]); k++)
{
opb.Write(info.class_subbook[j][k] + 1, 8);
}
}
/* save out the post list */
opb.Write(info.mult - 1, 2); /* only 1,2,3,4 legal now */
opb.Write(Util.ilog2(maxposit), 4);
rangebits = Util.ilog2(maxposit);
for (int j = 0, k = 0; j < info.Partitions; j++)
{
count += info.class_dim[info.Partitionclass[j]];
for (; k < count; k++)
{
opb.Write(info.postlist[k + 2], rangebits);
}
}
}
override internal int inverse2(Block vb, Object i, Object memo, float[] Out)
{
LookFloor1 look = (LookFloor1)i;
InfoFloor1 info = look.vi;
int n = vb.vd.vi.blocksizes[vb.mode] / 2;
if (memo != null)
{
/* render the lines */
int[] fit_value = (int[])memo;
int hx = 0;
int lx = 0;
int ly = fit_value[0] * info.mult;
for (int j = 1; j < look.posts; j++)
{
int current = look.forward_index[j];
int hy = fit_value[current] & 0x7fff;
if (hy == fit_value[current])
{
hy *= info.mult;
hx = info.postlist[current];
RenderLine(lx, hx, ly, hy, Out);
lx = hx;
ly = hy;
}
}
for (int j = hx; j < n; j++)
{
Out[j] *= Out[j - 1]; /* be certain */
}
return(1);
}
for (int j = 0; j < n; j++)
{
Out[j] = 0.0f;
}
return(0);
}
override internal Object unpack(Info vi, NVorbis.Ogg.BBuffer opb)
{
int count = 0, maxclass = -1, rangebits;
InfoFloor1 info = new InfoFloor1();
/* read partitions */
info.Partitions = opb.Read(5); /* only 0 to 31 legal */
for (int j = 0; j < info.Partitions; j++)
{
info.Partitionclass[j] = opb.Read(4); /* only 0 to 15 legal */
if (maxclass < info.Partitionclass[j])
{
maxclass = info.Partitionclass[j];
}
}
/* read partition classes */
for (int j = 0; j < maxclass + 1; j++)
{
info.class_dim[j] = opb.Read(3) + 1; /* 1 to 8 */
info.class_subs[j] = opb.Read(2); /* 0,1,2,3 bits */
if (info.class_subs[j] < 0)
{
info.free();
return(null);
}
if (info.class_subs[j] != 0)
{
info.class_book[j] = opb.Read(8);
}
if (info.class_book[j] < 0 || info.class_book[j] >= vi.Books)
{
info.free();
return(null);
}
for (int k = 0; k < (1 << info.class_subs[j]); k++)
{
info.class_subbook[j][k] = opb.Read(8) - 1;
if (info.class_subbook[j][k] < -1 || info.class_subbook[j][k] >= vi.Books)
{
info.free();
return(null);
}
}
}
/* read the post list */
info.mult = opb.Read(2) + 1; /* only 1,2,3,4 legal now */
rangebits = opb.Read(4);
for (int j = 0, k = 0; j < info.Partitions; j++)
{
count += info.class_dim[info.Partitionclass[j]];
for (; k < count; k++)
{
int t = info.postlist[k + 2] = opb.Read(rangebits);
if (t < 0 || t >= (1 << rangebits))
{
info.free();
return(null);
}
}
}
info.postlist[0] = 0;
info.postlist[1] = 1 << rangebits;
return(info);
}
override internal Object inverse1(Block vb, Object ii, Object memo)
{
LookFloor1 look = (LookFloor1)ii;
InfoFloor1 info = look.vi;
CodeBook[] books = vb.vd.fullbooks;
/* unpack wrapped/predicted values from stream */
if (vb.opb.Read(1) == 1)
{
int[] fit_value = null;
if (memo is int[])
{
fit_value = (int[])memo;
}
if (fit_value == null || fit_value.Length < look.posts)
{
fit_value = new int[look.posts];
}
else
{
for (int i = 0; i < fit_value.Length; i++)
{
fit_value[i] = 0;
}
}
fit_value[0] = vb.opb.Read(Util.ilog(look.quant_q - 1));
fit_value[1] = vb.opb.Read(Util.ilog(look.quant_q - 1));
/* partition by partition */
for (int i = 0, j = 2; i < info.Partitions; i++)
{
int clss = info.Partitionclass[i];
int cdim = info.class_dim[clss];
int csubbits = info.class_subs[clss];
int csub = 1 << csubbits;
uint cval = 0;
/* decode the partition's first stage cascade value */
if (csubbits != 0)
{
cval = (uint)books[info.class_book[clss]].decode(vb.opb);
if (unchecked (cval == (uint)(-1)))
{
return(null);
}
}
for (int k = 0; k < cdim; k++)
{
int book = info.class_subbook[clss][cval & (csub - 1)];
cval >>= csubbits;
if (book >= 0)
{
if ((fit_value[j + k] = books[book].decode(vb.opb)) == -1)
{
return(null);
}
}
else
{
fit_value[j + k] = 0;
}
}
j += cdim;
}
/* unwrap positive values and reconsitute via linear interpolation */
for (int i = 2; i < look.posts; i++)
{
int predicted = render_point(info.postlist[look.loneighbor[i - 2]],
info.postlist[look.hineighbor[i - 2]],
fit_value[look.loneighbor[i - 2]], fit_value[look.hineighbor[i - 2]],
info.postlist[i]);
int hiroom = look.quant_q - predicted;
int loroom = predicted;
int room = (hiroom < loroom ? hiroom : loroom) << 1;
int val = fit_value[i];
if (val != 0)
{
if (val >= room)
{
if (hiroom > loroom)
{
val = val - loroom;
}
else
{
val = -1 - (val - hiroom);
}
}
else
{
if ((val & 1) != 0)
{
val = -(int)(((uint)(val + 1)) >> 1);
}
else
{
val >>= 1;
}
}
fit_value[i] = val + predicted;
fit_value[look.loneighbor[i - 2]] &= 0x7fff;
fit_value[look.hineighbor[i - 2]] &= 0x7fff;
}
else
{
fit_value[i] = predicted | 0x8000;
}
}
return(fit_value);
}
return(null);
}
override internal Object look(DspState vd, InfoMode mi, Object i)
{
int _n = 0;
int[] sortpointer = new int[VIF_POSIT + 2];
// Info vi=vd.vi;
InfoFloor1 info = (InfoFloor1)i;
LookFloor1 look = new LookFloor1();
look.vi = info;
look.n = info.postlist[1];
/* we drop each position value in-between already decoded values,
* and use linear interpolation to predict each new value past the
* edges. The positions are read in the order of the position
* list... we precompute the bounding positions in the lookup. Of
* course, the neighbors can change (if a position is declined), but
* this is an initial mapping */
for (int j = 0; j < info.Partitions; j++)
{
_n += info.class_dim[info.Partitionclass[j]];
}
_n += 2;
look.posts = _n;
/* also store a sorted position index */
for (int j = 0; j < _n; j++)
{
sortpointer[j] = j;
}
// qsort(sortpointer,n,sizeof(int),icomp); // !!
int foo;
for (int j = 0; j < _n - 1; j++)
{
for (int k = j; k < _n; k++)
{
if (info.postlist[sortpointer[j]] > info.postlist[sortpointer[k]])
{
foo = sortpointer[k];
sortpointer[k] = sortpointer[j];
sortpointer[j] = foo;
}
}
}
/* points from sort order back to range number */
for (int j = 0; j < _n; j++)
{
look.forward_index[j] = sortpointer[j];
}
/* points from range order to sorted position */
for (int j = 0; j < _n; j++)
{
look.reverse_index[look.forward_index[j]] = j;
}
/* we actually need the post values too */
for (int j = 0; j < _n; j++)
{
look.sorted_index[j] = info.postlist[look.forward_index[j]];
}
/* quantize values to multiplier spec */
switch (info.mult)
{
case 1: /* 1024 -> 256 */
look.quant_q = 256;
break;
case 2: /* 1024 -> 128 */
look.quant_q = 128;
break;
case 3: /* 1024 -> 86 */
look.quant_q = 86;
break;
case 4: /* 1024 -> 64 */
look.quant_q = 64;
break;
default:
look.quant_q = -1;
break;
}
/* discover our neighbors for decode where we don't use fit flags
* (that would push the neighbors outward) */
for (int j = 0; j < _n - 2; j++)
{
int lo = 0;
int hi = 1;
int lx = 0;
int hx = look.n;
int currentx = info.postlist[j + 2];
for (int k = 0; k < j + 2; k++)
{
int x = info.postlist[k];
if (x > lx && x < currentx)
{
lo = k;
lx = x;
}
if (x < hx && x > currentx)
{
hi = k;
hx = x;
}
}
look.loneighbor[j] = lo;
look.hineighbor[j] = hi;
}
return(look);
}
internal Object copy_info()
{
InfoFloor1 info = this;
InfoFloor1 ret = new InfoFloor1();
ret.Partitions = info.Partitions;
Array.Copy(info.Partitionclass, 0, ret.Partitionclass, 0, VIF_PARTS);
Array.Copy(info.class_dim, 0, ret.class_dim, 0, VIF_CLASS);
Array.Copy(info.class_subs, 0, ret.class_subs, 0, VIF_CLASS);
Array.Copy(info.class_book, 0, ret.class_book, 0, VIF_CLASS);
for (int j = 0; j < VIF_CLASS; j++)
{
Array.Copy(info.class_subbook[j], 0, ret.class_subbook[j], 0, 8);
}
ret.mult = info.mult;
Array.Copy(info.postlist, 0, ret.postlist, 0, VIF_POSIT + 2);
ret.maxover = info.maxover;
ret.maxunder = info.maxunder;
ret.maxerr = info.maxerr;
ret.twofitminsize = info.twofitminsize;
ret.twofitminused = info.twofitminused;
ret.twofitweight = info.twofitweight;
ret.twofitatten = info.twofitatten;
ret.unusedminsize = info.unusedminsize;
ret.unusedmin_n = info.unusedmin_n;
ret.n = info.n;
return (ret);
}
internal override Object unpack(Info vi, NVorbis.Ogg.BBuffer opb)
{
int count = 0, maxclass = -1, rangebits;
InfoFloor1 info = new InfoFloor1();
/* read partitions */
info.Partitions = opb.Read(5); /* only 0 to 31 legal */
for (int j = 0; j < info.Partitions; j++)
{
info.Partitionclass[j] = opb.Read(4); /* only 0 to 15 legal */
if (maxclass < info.Partitionclass[j])
maxclass = info.Partitionclass[j];
}
/* read partition classes */
for (int j = 0; j < maxclass + 1; j++)
{
info.class_dim[j] = opb.Read(3) + 1; /* 1 to 8 */
info.class_subs[j] = opb.Read(2); /* 0,1,2,3 bits */
if (info.class_subs[j] < 0)
{
info.free();
return (null);
}
if (info.class_subs[j] != 0)
{
info.class_book[j] = opb.Read(8);
}
if (info.class_book[j] < 0 || info.class_book[j] >= vi.Books)
{
info.free();
return (null);
}
for (int k = 0; k < (1 << info.class_subs[j]); k++)
{
info.class_subbook[j][k] = opb.Read(8) - 1;
if (info.class_subbook[j][k] < -1 || info.class_subbook[j][k] >= vi.Books)
{
info.free();
return (null);
}
}
}
/* read the post list */
info.mult = opb.Read(2) + 1; /* only 1,2,3,4 legal now */
rangebits = opb.Read(4);
for (int j = 0, k = 0; j < info.Partitions; j++)
{
count += info.class_dim[info.Partitionclass[j]];
for (; k < count; k++)
{
int t = info.postlist[k + 2] = opb.Read(rangebits);
if (t < 0 || t >= (1 << rangebits))
{
info.free();
return (null);
}
}
}
info.postlist[0] = 0;
info.postlist[1] = 1 << rangebits;
return (info);
}