private void ParseDreamcast()
{
uint sampleTable = ReadUint(0x3C);
uint sampleCount = ReadUint(sampleTable) + 1;
for (uint i = 0; i < sampleCount; i++)
{
uint sampleEntryStart = sampleTable + 4 + (i * 0x10);
AudioSample sample = new AudioSample();
uint info = ReadUint(sampleEntryStart);
sample.Location = info & 0x7FFFFF;
sample.LowFrequency = ((info & 0x800000) == 0x800000);
sample.Compressed = ((info & 0x1000000) == 0x1000000);
sample.UnknownFlag2 = ((info & 0x2000000) == 0x2000000);
sample.LoopStart = ReadUShort(sampleEntryStart + 4);
sample.LoopEnd = ReadUShort(sampleEntryStart + 6);
sample.LowFrequencyAlt = ReadUint(sampleEntryStart + 8) > 0;
sample.Size = ReadUint(sampleEntryStart + 12);
_samples.Add(sample);
if (sample.Compressed && (sample.Size >> 1) > sample.LoopEnd)
{
//sample.Size >> 1 is the total sample count on DC
//LoopEnd is always <= Sample count. If LoopEnd is > Sample count,
//we probably have 32 bit samples meaning we are the PC version
Is2018Format = true;
}
}
}
public byte[] GetSampleData(AudioSample sample, bool decompress, bool scaleTo32bit)
{
byte[] retval = null;
if (!Is2018Format && sample.Compressed && decompress)
{
retval = adpcm2pcm(sample.Location, sample.Size);
}
else
{
retval = new byte[sample.Size];
Array.Copy(_data, sample.Location, retval, 0, sample.Size);
}
if (scaleTo32bit)
{
retval = WavUtil.ChangeBitDepth16to32(retval);
}
return(retval);
}
public string PrintSamplesInfo()
{
StringBuilder sb = new StringBuilder();
sb.AppendLine($"{_samples.Count} samples in file.");
if (Is2018Format)
{
sb.AppendLine($"This file is probably from the 2018 port");
}
for (int i = 0; i < _samples.Count; i++)
{
AudioSample sample = _samples[i];
sb.Append($"{i + 1}. ");
sb.Append((sample.Compressed) ? "ADPCM " : "PCM ");
sb.Append((sample.LowFrequency ? "Flag1=Yes " : "Flag1=No "));
sb.Append((sample.UnknownFlag2 ? "Flag2=Yes. " : "Flag2=No. "));
sb.Append($"Offset: {sample.Location.ToString("X")} Len: {sample.Size.ToString("X")} ");
sb.AppendLine($"Loop Start: {sample.LoopStart} Loop End: {sample.LoopEnd}");
}
return(sb.ToString());
}