public static unsafe void Initialize(AKB2Header *header)
{
header->Signature = 0x32424b41;
header->Constant01 = 0x00100000;
header->Constant02 = 0x00000001;
header->Constant03 = 0x00100000;
header->Constant04 = 0x00000020;
header->Constant07 = 0x00300101;
header->Constant08 = 0x3F800000;
header->Constant10 = 0x0180007C;
header->Constant11 = 0x000000FF;
header->Constant12 = 0x00000001;
header->Constant14 = 0x41F00000;
header->Constant19 = 0x00100000;
header->Constant20 = 0x000000C0;
header->Constant23 = 0x00000002;
AKB2UnknownSection.Initialize(&header->Section1);
AKB2UnknownSection.Initialize(&header->Section2);
AKB2UnknownSection.Initialize(&header->Section3);
AKB2UnknownSection.Initialize(&header->Section4);
header->Constant32 = 0x0500;
header->Unknown33 = 0x0002;
header->Constant34 = 0x0040;
header->SampleRate = 44100;
header->Constant36 = 0x00000010;
header->Constant39 = 0x3F800000;
header->Constant40 = 0x3F800000;
header->Constant41 = 0x3F800000;
header->Constant42 = 0x3F800000;
}
private static unsafe void ReadAkbDataFromOgg(SoundProfile profile, String oggPath, out IntPtr result, out UInt32 resultSize)
{
using (FileStream input = File.OpenRead(oggPath))
{
// Get size of content
UInt32 contentSize = (UInt32)input.Length;
UInt32 tailSize = contentSize % 16;
UInt32 dataSize = AkbHeaderSize + contentSize;
resultSize = dataSize + tailSize;
if (tailSize > 0)
{
tailSize = 16 - tailSize;
}
// Make an unmanaged array
CreateUnmanagedArray(out result, resultSize, tailSize, AkbHeaderSize);
// Read file to unmanaged memory
using (UnmanagedMemoryStream output = new UnmanagedMemoryStream((Byte *)result, resultSize, resultSize, FileAccess.Write))
{
output.Seek(AkbHeaderSize, SeekOrigin.Begin);
input.CopyTo(output, Math.Min(resultSize, 80000));
}
// Prepare header
AKB2Header *header = (AKB2Header *)result;
AKB2Header.Initialize(header);
// Initialize header
header->FileSize = resultSize;
header->ContentSize = contentSize;
header->Unknown09 = 0x000004002;
header->Unknown33 = 0x0002;
ReadMetadataFromVorbis(profile, input, header);
}
}
private static unsafe void ReadMetadataFromVorbis(SoundProfile profile, FileStream input, AKB2Header *header)
{
input.Position = 0;
using (VorbisReader vorbis = new VorbisReader(input, false))
{
//header->SampleCount = checked((UInt32)vorbis.TotalSamples);
header->SampleRate = checked ((UInt16)vorbis.SampleRate);
Int32 desiredCount = 2;
Int32 parsedCount = 0;
foreach (String comment in vorbis.Comments)
{
if (TryParseLoopStart(comment, ref header->LoopStart))
{
if (++parsedCount >= desiredCount)
{
break;
}
}
else if (TryParseLoopEnd(comment, ref header->LoopEnd))
{
if (++parsedCount >= desiredCount)
{
break;
}
}
}
if (profile.SoundProfileType == SoundProfileType.Music)
{
if (header->LoopEnd == 0)
{
header->LoopEnd = checked ((UInt32)(vorbis.TotalSamples - 1));
}
}
}
}
