protected override void DoMergeWith(NVorbis.DataPacket continuation)
{
var op = continuation as Packet;
if (op == null) throw new ArgumentException("Incorrect packet type!");
Length += continuation.Length;
if (_mergedPacket == null)
{
_mergedPacket = op;
}
else
{
_mergedPacket.DoMergeWith(continuation);
}
// per the spec, a partial packet goes with the next page's granulepos. we'll go ahead and assign it to the next page as well
PageGranulePosition = continuation.PageGranulePosition;
PageSequenceNumber = continuation.PageSequenceNumber;
}
internal int pack(NVorbis.Ogg.BBuffer opb)
{
int i;
bool ordered = false;
opb.Write(0x564342, 24);
opb.Write(dim, 16);
opb.Write(entries, 24);
// pack the codewords. There are two packings; length ordered and
// length random. Decide between the two now.
for (i = 1; i < entries; i++)
{
if (lengthlist[i] < lengthlist[i - 1])
break;
}
if (i == entries)
ordered = true;
if (ordered)
{
// length ordered. We only need to say how many codewords of
// each length. The actual codewords are generated
// deterministically
int count = 0;
opb.Write(1, 1); // ordered
opb.Write(lengthlist[0] - 1, 5); // 1 to 32
for (i = 1; i < entries; i++)
{
int _this = lengthlist[i];
int _last = lengthlist[i - 1];
if (_this > _last)
{
for (int j = _last; j < _this; j++)
{
opb.Write(i - count, Util.ilog(entries - count));
count = i;
}
}
}
opb.Write(i - count, Util.ilog(entries - count));
}
else
{
// length random. Again, we don't code the codeword itself, just
// the length. This time, though, we have to encode each length
opb.Write(0, 1); // unordered
// algortihmic mapping has use for 'unused entries', which we tag
// here. The algorithmic mapping happens as usual, but the unused
// entry has no codeword.
for (i = 0; i < entries; i++)
{
if (lengthlist[i] == 0)
break;
}
if (i == entries)
{
opb.Write(0, 1); // no unused entries
for (i = 0; i < entries; i++)
{
opb.Write(lengthlist[i] - 1, 5);
}
}
else
{
opb.Write(1, 1); // we have unused entries; thus we tag
for (i = 0; i < entries; i++)
{
if (lengthlist[i] == 0)
{
opb.Write(0, 1);
}
else
{
opb.Write(1, 1);
opb.Write(lengthlist[i] - 1, 5);
}
}
}
}
// is the entry number the desired return value, or do we have a
// mapping? If we have a mapping, what type?
opb.Write(maptype, 4);
switch (maptype)
{
case 0:
// no mapping
break;
case 1:
case 2:
// implicitly populated value mapping
// explicitly populated value mapping
if (quantlist == null)
{
// no quantlist? error
return (-1);
}
// values that define the dequantization
opb.Write(q_min, 32);
opb.Write(q_delta, 32);
opb.Write(q_quant - 1, 4);
opb.Write(q_sequencep, 1);
{
int quantvals = 0;
switch (maptype)
{
case 1:
// a single column of (c->entries/c->dim) quantized values for
// building a full value list algorithmically (square lattice)
quantvals = maptype1_quantvals();
break;
case 2:
// every value (c->entries*c->dim total) specified explicitly
quantvals = entries * dim;
break;
}
// quantized values
for (i = 0; i < quantvals; i++)
{
opb.Write(Math.Abs(quantlist[i]), q_quant);
}
}
break;
default:
// error case; we don't have any other map types now
return (-1);
}
return (0);
}
internal override void pack(Info vi, Object imap, NVorbis.Ogg.BBuffer opb)
{
InfoMapping0 info = (InfoMapping0)imap;
/* another 'we meant to do it this way' hack... up to beta 4, we
packed 4 binary zeros here to signify one submapping in use. We
now redefine that to mean four bitflags that indicate use of
deeper features; bit0:submappings, bit1:coupling,
bit2,3:reserved. This is backward compatable with all actual uses
of the beta code. */
if (info.submaps > 1)
{
opb.Write(1, 1);
opb.Write(info.submaps - 1, 4);
}
else
{
opb.Write(0, 1);
}
if (info.coupling_steps > 0)
{
opb.Write(1, 1);
opb.Write(info.coupling_steps - 1, 8);
for (int i = 0; i < info.coupling_steps; i++)
{
opb.Write(info.coupling_mag[i], Util.ilog2(vi.Channels));
opb.Write(info.coupling_ang[i], Util.ilog2(vi.Channels));
}
}
else
{
opb.Write(0, 1);
}
opb.Write(0, 2); /* 2,3:reserved */
/* we don't write the channel submappings if we only have one... */
if (info.submaps > 1)
{
for (int i = 0; i < vi.Channels; i++)
opb.Write(info.chmuxlist[i], 4);
}
for (int i = 0; i < info.submaps; i++)
{
opb.Write(info.timesubmap[i], 8);
opb.Write(info.floorsubmap[i], 8);
opb.Write(info.residuesubmap[i], 8);
}
}
internal abstract void pack(Object vr, NVorbis.Ogg.BBuffer opb);
internal int unpack(NVorbis.Ogg.BBuffer opb)
{
int vendorlen = opb.Read(32);
if (vendorlen < 0)
{
Clear();
return (-1);
}
vendor = new byte[vendorlen + 1];
opb.Read(vendor, vendorlen);
comments = opb.Read(32);
if (comments < 0)
{
Clear();
return (-1);
}
user_comments = new byte[comments + 1][];
comment_lengths = new int[comments + 1];
for (int i = 0; i < comments; i++)
{
int len = opb.Read(32);
if (len < 0)
{
Clear();
return (-1);
}
comment_lengths[i] = len;
user_comments[i] = new byte[len + 1];
opb.Read(user_comments[i], len);
}
if (opb.Read(1) != 1)
{
Clear();
return (-1);
}
return (0);
}
public int HeaderOut(NVorbis.Ogg.Packet op)
{
NVorbis.Ogg.BBuffer opb = new NVorbis.Ogg.BBuffer();
opb.WriteInit();
if (Pack(opb) != 0)
return OV_EIMPL;
op.packet_base = new byte[opb.bytes()];
op.packet = 0;
op.bytes = opb.bytes();
Array.Copy(opb.buffer(), 0, op.packet_base, 0, op.bytes);
op.b_o_s = 0;
op.e_o_s = 0;
op.granulepos = 0;
return 0;
}
/// <summary>
/// All of the real encoding details are here. The modes, books, everything.
/// </summary>
/// <param name="Buffer"></param>
/// <returns></returns>
int UnpackBooks(NVorbis.Ogg.BBuffer Buffer)
{
Books = Buffer.Read(8) + 1;
if (BookParam == null || BookParam.Length != Books) BookParam = new StaticCodeBook[Books];
for (int i = 0; i < Books; i++)
{
BookParam[i] = new StaticCodeBook();
if (BookParam[i].unpack(Buffer) != 0)
{
Clear();
return (-1);
}
}
// time backend settings
Times = Buffer.Read(6) + 1;
if (TimeType == null || TimeType.Length != Times) TimeType = new int[Times];
if (TimeParam == null || TimeParam.Length != Times) TimeParam = new Object[Times];
for (int i = 0; i < Times; i++)
{
TimeType[i] = Buffer.Read(16);
if (TimeType[i] < 0 || TimeType[i] >= VI_TIMEB)
{
Clear();
return (-1);
}
TimeParam[i] = FuncTime.time_P[TimeType[i]].unpack(this, Buffer);
if (TimeParam[i] == null)
{
Clear();
return (-1);
}
}
// floor backend settings
floors = Buffer.Read(6) + 1;
if (FloorType == null || FloorType.Length != floors) FloorType = new int[floors];
if (FloorParam == null || FloorParam.Length != floors) FloorParam = new Object[floors];
for (int i = 0; i < floors; i++)
{
FloorType[i] = Buffer.Read(16);
if (FloorType[i] < 0 || FloorType[i] >= VI_FLOORB)
{
Clear();
return (-1);
}
FloorParam[i] = FuncFloor.floor_P[FloorType[i]].unpack(this, Buffer);
if (FloorParam[i] == null)
{
Clear();
return (-1);
}
}
// residue backend settings
residues = Buffer.Read(6) + 1;
if (residue_type == null || residue_type.Length != residues)
residue_type = new int[residues];
if (ResidueParam == null || ResidueParam.Length != residues)
ResidueParam = new Object[residues];
for (int i = 0; i < residues; i++)
{
residue_type[i] = Buffer.Read(16);
if (residue_type[i] < 0 || residue_type[i] >= VI_RESB)
{
Clear();
return (-1);
}
ResidueParam[i] = FuncResidue.residue_P[residue_type[i]].unpack(this, Buffer);
if (ResidueParam[i] == null)
{
Clear();
return (-1);
}
}
// map backend settings
maps = Buffer.Read(6) + 1;
if (map_type == null || map_type.Length != maps)
map_type = new int[maps];
if (MapParam == null || MapParam.Length != maps)
MapParam = new Object[maps];
for (int i = 0; i < maps; i++)
{
map_type[i] = Buffer.Read(16);
if (map_type[i] < 0 || map_type[i] >= VI_MAPB)
{
Clear();
return (-1);
}
MapParam[i] = FuncMapping.mapping_P[map_type[i]].unpack(this, Buffer);
if (MapParam[i] == null)
{
Clear();
return (-1);
}
}
// mode settings
Modes = Buffer.Read(6) + 1;
if (ModeParam == null || ModeParam.Length != Modes)
ModeParam = new InfoMode[Modes];
for (int i = 0; i < Modes; i++)
{
ModeParam[i] = new InfoMode();
ModeParam[i].blockflag = Buffer.Read(1);
ModeParam[i].windowtype = Buffer.Read(16);
ModeParam[i].transformtype = Buffer.Read(16);
ModeParam[i].mapping = Buffer.Read(8);
if ((ModeParam[i].windowtype >= VI_WINDOWB)
|| (ModeParam[i].transformtype >= VI_WINDOWB)
|| (ModeParam[i].mapping >= maps))
{
Clear();
return (-1);
}
}
if (Buffer.Read(1) != 1)
{
Clear();
return (-1);
}
return (0);
}
int PackBooks(NVorbis.Ogg.BBuffer Buffer)
{
Buffer.Write(0x05, 8);
Buffer.Write(_vorbis);
// books
Buffer.Write(Books - 1, 8);
for (int i = 0; i < Books; i++)
{
if (BookParam[i].pack(Buffer) != 0)
{
//goto err_out;
return (-1);
}
}
// times
Buffer.Write(Times - 1, 6);
for (int i = 0; i < Times; i++)
{
Buffer.Write(TimeType[i], 16);
FuncTime.time_P[TimeType[i]].pack(this.TimeParam[i], Buffer);
}
// floors
Buffer.Write(floors - 1, 6);
for (int i = 0; i < floors; i++)
{
Buffer.Write(FloorType[i], 16);
FuncFloor.floor_P[FloorType[i]].pack(FloorParam[i], Buffer);
}
// residues
Buffer.Write(residues - 1, 6);
for (int i = 0; i < residues; i++)
{
Buffer.Write(residue_type[i], 16);
FuncResidue.residue_P[residue_type[i]].pack(ResidueParam[i], Buffer);
}
// maps
Buffer.Write(maps - 1, 6);
for (int i = 0; i < maps; i++)
{
Buffer.Write(map_type[i], 16);
FuncMapping.mapping_P[map_type[i]].pack(this, MapParam[i], Buffer);
}
// modes
Buffer.Write(Modes - 1, 6);
for (int i = 0; i < Modes; i++)
{
Buffer.Write(ModeParam[i].blockflag, 1);
Buffer.Write(ModeParam[i].windowtype, 16);
Buffer.Write(ModeParam[i].transformtype, 16);
Buffer.Write(ModeParam[i].mapping, 8);
}
Buffer.Write(1, 1);
return (0);
}
internal override void pack(Object i, NVorbis.Ogg.BBuffer opb)
{
}
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);
}
internal override 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);
}
}
}
internal override Object unpack(Info vi, NVorbis.Ogg.BBuffer opb)
{
InfoFloor0 info = new InfoFloor0();
info.order = opb.Read(8);
info.rate = opb.Read(16);
info.barkmap = opb.Read(16);
info.ampbits = opb.Read(6);
info.ampdB = opb.Read(8);
info.numbooks = opb.Read(4) + 1;
if ((info.order < 1) || (info.rate < 1) || (info.barkmap < 1) || (info.numbooks < 1))
{
return (null);
}
for (int j = 0; j < info.numbooks; j++)
{
info.books[j] = opb.Read(8);
if (info.books[j] < 0 || info.books[j] >= vi.Books)
{
return (null);
}
}
return (info);
}
internal override void pack(Object i, NVorbis.Ogg.BBuffer opb)
{
InfoFloor0 info = (InfoFloor0)i;
opb.Write(info.order, 8);
opb.Write(info.rate, 16);
opb.Write(info.barkmap, 16);
opb.Write(info.ampbits, 6);
opb.Write(info.ampdB, 8);
opb.Write(info.numbooks - 1, 4);
for (int j = 0; j < info.numbooks; j++)
opb.Write(info.books[j], 8);
}
internal abstract Object unpack(Info info, NVorbis.Ogg.BBuffer buffer);
internal abstract void pack(Info info, Object imap, NVorbis.Ogg.BBuffer buffer);
internal override void pack(Object vr, NVorbis.Ogg.BBuffer opb)
{
InfoResidue0 info = (InfoResidue0)vr;
int acc = 0;
opb.Write(info.begin, 24);
opb.Write(info.end, 24);
opb.Write(info.grouping - 1, 24); /* residue vectors to group and
code with a partitioned book */
opb.Write(info.partitions - 1, 6); /* possible partition choices */
opb.Write(info.groupbook, 8); /* group huffman book */
/* secondstages is a bitmask; as encoding progresses pass by pass, a
bitmask of one indicates this partition class has bits to write
this pass */
for (int j = 0; j < info.partitions; j++)
{
int i = info.secondstages[j];
if (Util.ilog(i) > 3)
{
/* yes, this is a minor hack due to not thinking ahead */
opb.Write(i, 3);
opb.Write(1, 1);
opb.Write((int)(((uint)i) >> 3), 5);
}
else
{
opb.Write(i, 4); /* trailing zero */
}
acc += Util.icount(i);
}
for (int j = 0; j < acc; j++)
{
opb.Write(info.booklist[j], 8);
}
}
internal override Object unpack(Info vi, NVorbis.Ogg.BBuffer opb)
{
int acc = 0;
InfoResidue0 info = new InfoResidue0();
info.begin = opb.Read(24);
info.end = opb.Read(24);
info.grouping = opb.Read(24) + 1;
info.partitions = opb.Read(6) + 1;
info.groupbook = opb.Read(8);
for (int j = 0; j < info.partitions; j++)
{
int cascade = opb.Read(3);
if (opb.Read(1) != 0)
{
cascade |= (opb.Read(5) << 3);
}
info.secondstages[j] = cascade;
acc += Util.icount(cascade);
}
for (int j = 0; j < acc; j++)
{
info.booklist[j] = opb.Read(8);
}
if (info.groupbook >= vi.Books)
{
free_info(info);
return (null);
}
for (int j = 0; j < acc; j++)
{
if (info.booklist[j] >= vi.Books)
{
free_info(info);
return (null);
}
}
return (info);
}
internal override Object unpack(Info vi, NVorbis.Ogg.BBuffer opb)
{
return "";
}
// pack side
int PackInfo(NVorbis.Ogg.BBuffer Buffer)
{
// preamble
Buffer.Write(0x01, 8);
Buffer.Write(_vorbis);
// basic information about the stream
Buffer.Write(0x00, 32);
Buffer.Write(Channels, 8);
Buffer.Write(Rate, 32);
Buffer.Write(bitrate_upper, 32);
Buffer.Write(bitrate_nominal, 32);
Buffer.Write(bitrate_lower, 32);
Buffer.Write(Util.ilog2(blocksizes[0]), 4);
Buffer.Write(Util.ilog2(blocksizes[1]), 4);
Buffer.Write(1, 1);
return (0);
}
// Decode side is specced and easier, because we don't need to find
// matches using different criteria; we simply read and map. There are
// two things we need to do 'depending':
//
// We may need to support interleave. We don't really, but it's
// convenient to do it here rather than rebuild the vector later.
//
// Cascades may be additive or multiplicitive; this is not inherent in
// the codebook, but set in the code using the codebook. Like
// interleaving, it's easiest to do it here.
// stage==0 -> declarative (set the value)
// stage==1 -> additive
// stage==2 -> multiplicitive
// returns the entry number or -1 on eof
internal int decode(NVorbis.Ogg.BBuffer b)
{
int ptr = 0;
DecodeAux t = decode_tree;
int lok = b.Look(t.tabn);
if (lok >= 0)
{
ptr = t.tab[lok];
b.adv(t.tabl[lok]);
if (ptr <= 0)
{
return -ptr;
}
}
do
{
switch (b.Read1())
{
case 0:
ptr = t.ptr0[ptr];
break;
case 1:
ptr = t.ptr1[ptr];
break;
case -1:
default:
return (-1);
}
}
while (ptr > 0);
return (-ptr);
}
/// <summary>
/// Header packing/unpacking
/// </summary>
/// <param name="Buffer"></param>
/// <returns></returns>
int UnpackInfo(NVorbis.Ogg.BBuffer Buffer)
{
version = Buffer.Read(32);
if (version != 0) return (-1);
Channels = Buffer.Read(8);
Rate = Buffer.Read(32);
bitrate_upper = Buffer.Read(32);
bitrate_nominal = Buffer.Read(32);
bitrate_lower = Buffer.Read(32);
blocksizes[0] = 1 << Buffer.Read(4);
blocksizes[1] = 1 << Buffer.Read(4);
if ((Rate < 1) || (Channels < 1) || (blocksizes[0] < 8) || (blocksizes[1] < blocksizes[0])
|| (Buffer.Read(1) != 1))
{
Clear();
return (-1);
}
return (0);
}
// returns the entry number or -1 on eof
internal int decodevs(float[] a, int index, NVorbis.Ogg.BBuffer b, int step, int addmul)
{
int entry = decode(b);
if (entry == -1)
return (-1);
switch (addmul)
{
case -1:
for (int i = 0, o = 0; i < dim; i++, o += step)
a[index + o] = valuelist[entry * dim + i];
break;
case 0:
for (int i = 0, o = 0; i < dim; i++, o += step)
a[index + o] += valuelist[entry * dim + i];
break;
case 1:
for (int i = 0, o = 0; i < dim; i++, o += step)
a[index + o] *= valuelist[entry * dim + i];
break;
default:
//System.err.println("CodeBook.decodeves: addmul="+addmul);
break;
}
return (entry);
}
internal int Pack(NVorbis.Ogg.BBuffer Buffer)
{
// preamble
Buffer.Write(0x03, 8);
Buffer.Write(_vorbis);
// vendor
Buffer.Write(_vendor.Length, 32);
Buffer.Write(_vendor);
// comments
Buffer.Write(comments, 32);
if (comments != 0)
{
for (int i = 0; i < comments; i++)
{
if (user_comments[i] != null)
{
Buffer.Write(comment_lengths[i], 32);
Buffer.Write(user_comments[i]);
}
else
{
Buffer.Write(0, 32);
}
}
}
Buffer.Write(1, 1);
return (0);
}
internal int decodevs_add(float[] a, int offset, NVorbis.Ogg.BBuffer b, int n)
{
lock (this)
{
int step = n / dim;
int entry;
int i, j, o;
if (t.Length < step)
{
t = new int[step];
}
for (i = 0; i < step; i++)
{
entry = decode(b);
if (entry == -1)
return (-1);
t[i] = entry * dim;
}
for (i = 0, o = 0; i < dim; i++, o += step)
{
for (j = 0; j < step; j++)
{
a[offset + o + j] += valuelist[t[j] + i];
}
}
return (0);
}
}
internal int decodevv_add(float[][] a, int offset, int ch, NVorbis.Ogg.BBuffer b, int n)
{
int i, j, entry;
int chptr = 0;
for (i = offset / ch; i < (offset + n) / ch; )
{
entry = decode(b);
if (entry == -1)
return (-1);
int t = entry * dim;
for (j = 0; j < dim; j++)
{
a[chptr++][i] += valuelist[t + j];
if (chptr == ch)
{
chptr = 0;
i++;
}
}
}
return (0);
}
internal int decodev_add(float[] a, int offset, NVorbis.Ogg.BBuffer b, int n)
{
int i, j, entry;
int t;
if (dim > 8)
{
for (i = 0; i < n; )
{
entry = decode(b);
if (entry == -1)
return (-1);
t = entry * dim;
for (j = 0; j < dim; )
{
a[offset + (i++)] += valuelist[t + (j++)];
}
}
}
else
{
for (i = 0; i < n; )
{
entry = decode(b);
if (entry == -1)
return (-1);
t = entry * dim;
j = 0;
switch (dim)
{
case 8:
a[offset + (i++)] += valuelist[t + (j++)];
goto case 7;
case 7:
a[offset + (i++)] += valuelist[t + (j++)];
goto case 6;
case 6:
a[offset + (i++)] += valuelist[t + (j++)];
goto case 5;
case 5:
a[offset + (i++)] += valuelist[t + (j++)];
goto case 4;
case 4:
a[offset + (i++)] += valuelist[t + (j++)];
goto case 3;
case 3:
a[offset + (i++)] += valuelist[t + (j++)];
goto case 2;
case 2:
a[offset + (i++)] += valuelist[t + (j++)];
goto case 1;
case 1:
a[offset + (i++)] += valuelist[t + (j++)];
goto case 0;
case 0:
break;
}
}
}
return (0);
}
internal abstract Object unpack(Info vi, NVorbis.Ogg.BBuffer opb);
internal int decodev_set(float[] a, int offset, NVorbis.Ogg.BBuffer b, int n)
{
int i, j, entry;
int t;
for (i = 0; i < n; )
{
entry = decode(b);
if (entry == -1) return (-1);
t = entry * dim;
for (j = 0; j < dim; )
{
a[offset + i++] = valuelist[t + (j++)];
}
}
return (0);
}
// also responsible for range checking
internal override Object unpack(Info vi, NVorbis.Ogg.BBuffer opb)
{
InfoMapping0 info = new InfoMapping0();
if (opb.Read(1) != 0)
{
info.submaps = opb.Read(4) + 1;
}
else
{
info.submaps = 1;
}
if (opb.Read(1) != 0)
{
info.coupling_steps = opb.Read(8) + 1;
for (int i = 0; i < info.coupling_steps; i++)
{
int testM = info.coupling_mag[i] = opb.Read(Util.ilog2(vi.Channels));
int testA = info.coupling_ang[i] = opb.Read(Util.ilog2(vi.Channels));
if (testM < 0 || testA < 0 || testM == testA || testM >= vi.Channels
|| testA >= vi.Channels)
{
//goto err_out;
info.free();
return (null);
}
}
}
if (opb.Read(2) > 0)
{ /* 2,3:reserved */
info.free();
return (null);
}
if (info.submaps > 1)
{
for (int i = 0; i < vi.Channels; i++)
{
info.chmuxlist[i] = opb.Read(4);
if (info.chmuxlist[i] >= info.submaps)
{
info.free();
return (null);
}
}
}
for (int i = 0; i < info.submaps; i++)
{
info.timesubmap[i] = opb.Read(8);
if (info.timesubmap[i] >= vi.Times)
{
info.free();
return (null);
}
info.floorsubmap[i] = opb.Read(8);
if (info.floorsubmap[i] >= vi.floors)
{
info.free();
return (null);
}
info.residuesubmap[i] = opb.Read(8);
if (info.residuesubmap[i] >= vi.residues)
{
info.free();
return (null);
}
}
return info;
}
// unpacks a codebook from the packet buffer into the codebook struct,
// readies the codebook auxiliary structures for decode
internal int unpack(NVorbis.Ogg.BBuffer opb)
{
int i;
//memset(s,0,sizeof(static_codebook));
// make sure alignment is correct
if (opb.Read(24) != 0x564342)
{
// goto _eofout;
clear();
return (-1);
}
// first the basic parameters
dim = opb.Read(16);
entries = opb.Read(24);
if (entries == -1)
{
// goto _eofout;
clear();
return (-1);
}
// codeword ordering.... length ordered or unordered?
switch (opb.Read(1))
{
case 0:
// unordered
lengthlist = new int[entries];
// allocated but unused entries?
if (opb.Read(1) != 0)
{
// yes, unused entries
for (i = 0; i < entries; i++)
{
if (opb.Read(1) != 0)
{
int num = opb.Read(5);
if (num == -1)
{
// goto _eofout;
clear();
return (-1);
}
lengthlist[i] = num + 1;
}
else
{
lengthlist[i] = 0;
}
}
}
else
{
// all entries used; no tagging
for (i = 0; i < entries; i++)
{
int num = opb.Read(5);
if (num == -1)
{
// goto _eofout;
clear();
return (-1);
}
lengthlist[i] = num + 1;
}
}
break;
case 1:
// ordered
{
int length = opb.Read(5) + 1;
lengthlist = new int[entries];
for (i = 0; i < entries; )
{
int num = opb.Read(Util.ilog(entries - i));
if (num == -1)
{
// goto _eofout;
clear();
return (-1);
}
for (int j = 0; j < num; j++, i++)
{
lengthlist[i] = length;
}
length++;
}
}
break;
default:
// EOF
return (-1);
}
// Do we have a mapping to unpack?
switch ((maptype = opb.Read(4)))
{
case 0:
// no mapping
break;
case 1:
case 2:
// implicitly populated value mapping
// explicitly populated value mapping
q_min = opb.Read(32);
q_delta = opb.Read(32);
q_quant = opb.Read(4) + 1;
q_sequencep = opb.Read(1);
{
int quantvals = 0;
switch (maptype)
{
case 1:
quantvals = maptype1_quantvals();
break;
case 2:
quantvals = entries * dim;
break;
}
// quantized values
quantlist = new int[quantvals];
for (i = 0; i < quantvals; i++)
{
quantlist[i] = opb.Read(q_quant);
}
if (quantlist[quantvals - 1] == -1)
{
// goto _eofout;
clear();
return (-1);
}
}
break;
default:
// goto _eofout;
clear();
return (-1);
}
// all set
return (0);
// _errout:
// _eofout:
// vorbis_staticbook_clear(s);
// return(-1);
}
