/* rebuilds an external Wwise codebook referenced by id to a Vorbis codebook */
static int ww2ogg_codebook_library_rebuild_by_id(dBitWrite w_bits, uint codebook_id)
{
/* Wwise codebook buffer */
var tmp = new BinaryReader(new MemoryStream(wvc_list_aotuv603[codebook_id]));
ww2ogg_codebook_library_rebuild(w_bits, BitReader(tmp));
tmp.Dispose();
return(1);
}
/* rebuilds a Wwise codebook into a Vorbis codebook */
static void ww2ogg_codebook_library_rebuild(dBitWrite w_bits, dBitRead r_bits)
{
w_bits(24, 0x564342); /* "VCB" */
var dimensions = r_bits(4);
w_bits(16, dimensions); /* 4 to 16 */
var entries = r_bits(14);
w_bits(24, entries); /* 14 to 24*/
/* codeword lengths */
var ordered = r_bits(1);
w_bits(1, ordered);
if (0 != ordered)
{
var initial_length = r_bits(5);
w_bits(5, initial_length);
var current_entry = 0;
while (current_entry < entries)
{
var number_bits = ww2ogg_tremor_ilog((uint)(entries - current_entry));
var number = r_bits(number_bits);
w_bits(number_bits, number);
current_entry += (int)number;
}
if (current_entry > entries)
{
throw new System.Exception("Wwise Vorbis: current_entry out of range\n");
}
}
else
{
var codeword_length_length = r_bits(3);
var sparse = r_bits(1);
w_bits(1, sparse);
if (0 == codeword_length_length || 5 < codeword_length_length)
{
throw new System.Exception("Wwise Vorbis: nonsense codeword length\n");
}
for (var i = 0; i < entries; i++)
{
var present_bool = true;
if (0 != sparse)
{
var present = r_bits(1);
w_bits(1, present);
present_bool = (0 != present);
}
if (present_bool)
{
var codeword_length = r_bits(codeword_length_length);
w_bits(5, codeword_length); /* max 7 (3b) to 5 */
}
}
}
/* lookup table */
var lookup_type = r_bits(1);
w_bits(4, lookup_type); /* 1 to 4 */
if (0 == lookup_type)
{
//VGM_LOG("Wwise Vorbis: no lookup table\n");
}
else if (1 == lookup_type)
{
//VGM_LOG("Wwise Vorbis: lookup type 1\n");
var min = r_bits(32);
w_bits(32, min);
var max = r_bits(32);
w_bits(32, max);
var value_length = r_bits(4);
w_bits(4, value_length);
var sequence_flag = r_bits(1);
w_bits(1, sequence_flag);
var quantvals = ww2ogg_tremor_book_maptype1_quantvals(entries, dimensions);
for (var i = 0; i < quantvals; i++)
{
var val_bits = value_length + 1;
var val = r_bits(val_bits);
w_bits(val_bits, val);
}
}
else if (2 == lookup_type)
{
throw new System.Exception("Wwise Vorbis: didn't expect lookup type 2\n");
}
else
{
throw new System.Exception("Wwise Vorbis: invalid lookup type\n");
}
/* check that we used exactly all bytes */
/* note: if all bits are used in the last byte there will be one extra 0 byte */
//if (0 != cb_size && iw->b_off / 8 + 1 != cb_size)
//{
//VGM_LOG("Wwise Vorbis: codebook size mistach (expected 0x%x, wrote 0x%lx)\n", cb_size, iw->b_off/8+1);
//}
}
