ArcFile OpenTp055Arc(ArcView file)
{
uint index_offset = 0x20;
uint data_offset;
for (;;)
{
data_offset = file.View.ReadUInt32(index_offset);
if (0 != data_offset)
{
break;
}
index_offset += 0x10;
if (0xA010 == index_offset)
{
return(null);
}
}
if (data_offset >= file.MaxOffset)
{
return(null);
}
var dir = new List <Entry>();
while (index_offset < data_offset)
{
var offset = file.View.ReadUInt32(index_offset);
if (0 != offset)
{
if (offset >= file.MaxOffset)
{
return(null);
}
var name = string.Format("TP#{0:D6}.wav", index_offset / 0x10 - 1);
var entry = new Tp055Entry {
Name = name,
Offset = offset,
ChunkCount = file.View.ReadInt32(index_offset + 4),
};
dir.Add(entry);
}
index_offset += 0x10;
}
for (int i = 0; i < dir.Count - 1; ++i)
{
dir[i].Size = (uint)(dir[i + 1].Offset - dir[i].Offset);
}
dir[dir.Count - 1].Size = (uint)(file.MaxOffset - dir[dir.Count - 1].Offset);
return(new TpArchive(file, this, dir));
}
Stream OpenVoice055Entry(ArcFile arc, Tp055Entry entry)
{
int pcm_size = entry.ChunkCount * 0x800;
var offset = entry.Offset;
var wav_mem = new MemoryStream(0x24 + pcm_size);
using (var wav = new BinaryWriter(wav_mem, Encoding.ASCII, true))
{
WriteWavHeader(wav, 1, 22050, pcm_size);
var buffer = new byte[0x402];
var output = new int[0x400];
for (int i = 0; i < entry.ChunkCount; ++i)
{
int ctl = arc.File.View.ReadByte(offset++) & 0x3F;
for (int j = 0; j < output.Length; ++j)
{
output[j] = 0;
}
for (; ctl != 0; ctl >>= 1)
{
if (0 == (ctl & 1))
{
continue;
}
arc.File.View.Read(offset, buffer, 0, 0x402);
offset += 0x402;
int pcm = LittleEndian.ToInt16(buffer, 1);
int dst = 0;
int addend = buffer[0] << 8;
output[dst++] += pcm;
for (int src = 3; src < buffer.Length; ++src)
{
byte v = buffer[src];
int diff = v + addend;
pcm += WaveTable1.Value[diff];
output[dst++] += (short)pcm;
addend += WaveTable2.Value[v];
if (addend < 0)
{
addend = 0;
}
else if (addend >= 16384)
{
addend = 16128;
}
}
}
for (int j = 0; j < output.Length; ++j)
{
int pcm = output[j];
if (pcm > 32767)
{
pcm = 32767;
}
else if (pcm < -32767)
{
pcm = -32767;
}
wav.Write((short)pcm);
}
}
}
wav_mem.Position = 0;
return(wav_mem);
}
