public EmsacExpansion(EmsacSoundInfo info)
{
Version = info.Version;
Transformation = info.Transformation;
ChannelCount = info.ChannelCount;
SubbandDegree = info.SubbandDegree;
LappedDegree = info.LappedDegree;
}
void SetWaveFormat(EmsacSoundInfo info)
{
int pcm_bitrate = (int)(m_info.SamplesPerSec * 16 * m_info.ChannelCount);
m_format.FormatTag = 1;
m_format.Channels = (ushort)ChannelCount;
m_format.SamplesPerSecond = m_info.SamplesPerSec;
m_format.BitsPerSample = (ushort)BitsPerSample;
m_format.BlockAlign = (ushort)(BitsPerSample / 8 * format.Channels);
m_format.AverageBytesPerSecond = (uint)pcm_bitrate / 8;
}
void SetSoundInfo(EmsacSoundInfo info)
{
m_info = info;
m_exp = new EmsacExpansion(info);
m_version = info.Version;
m_field_98 = info.Architecture;
m_field_9C = 133;
m_field_A0 = -1;
m_field_A4 = 0;
int subband = 2 << info.SubbandDegree;
m_lappedSubband = subband << info.LappedDegree;
}
void ReadHeader(EriFile erif)
{
var section = erif.ReadSection();
if (section.Id != "Header " || section.Length <= 0 || section.Length > int.MaxValue)
{
return(null);
}
m_stream_pos = erif.BaseStream.Position + section.Length;
section = erif.ReadSection();
if (section.Id != "FileHdr" || section.Length < 8)
{
return(null);
}
var file_hdr = new byte[section.Length];
erif.Read(file_hdr, 0, file_hdr.Length);
if (0 == (file_hdr[5] & 1))
{
return(null);
}
section = erif.ReadSection();
if (section.Id != "SoundInf" || section.Length < 0x24)
{
return(null);
}
var info = new EmsacSoundInfo();
info.Version = erif.ReadInt32();
info.Transformation = (CvType)erif.ReadInt32();
info.Architecture = (EriCode)erif.ReadInt32();
info.ChannelCount = erif.ReadInt32();
info.SamplesPerSec = erif.ReadUInt32();
info.BlocksetCount = erif.ReadUInt32();
info.SubbandDegree = erif.ReadInt32();
info.AllSampleCount = erif.ReadInt32();
info.LappedDegree = erif.ReadInt32();
SetSoundInfo(info);
SetWaveFormat(info);
erif.BaseStream.Position = m_stream_pos;
var stream_size = erif.FindSection("Stream ");
m_stream_pos = erif.BaseStream.Position;
}