public static OJM.OMC Decode(string filename)
{
if (!Check(filename))
{
throw new NotSupportedException("Invalid OMC OJM");
}
var omc = new OJM.OMC();
using (var stream = new BufferStream(filename))
{
stream.Seek(4, SeekOrigin.Begin);
short waveCount = stream.ReadInt16();
short oggCount = stream.ReadInt16();
int waveOffset = stream.ReadInt32();
int oggOffset = stream.ReadInt32();
int fileSize = stream.ReadInt32();
var waveSamples = new Dictionary <int, OJM.OMC.WaveSample>();
stream.Seek(waveOffset, SeekOrigin.Begin);
for (short i = 0; i < waveCount; i++)
{
var sample = new OJM.OMC.WaveSample()
{
Id = i,
Name = stream.ReadString(32),
AudioFormat = stream.ReadInt16(),
ChannelCount = stream.ReadInt16(),
SampleRate = stream.ReadInt32(),
Bitrate = stream.ReadInt32(),
BlockAlign = stream.ReadInt16(),
BitsPerSample = stream.ReadInt16(),
UnkData = stream.ReadInt32()
};
int size = stream.ReadInt32();
if (size > 0)
{
using (var waveStream = new BufferStream())
{
waveStream.Write("RIFF");
waveStream.Write((int)(size + 36));
waveStream.Write("WAVE");
waveStream.Write("fmt ");
waveStream.Write((int)16); // PCM OJM Format
waveStream.Write((short)sample.AudioFormat);
waveStream.Write((short)sample.ChannelCount);
waveStream.Write((int)sample.SampleRate);
waveStream.Write((int)sample.Bitrate);
waveStream.Write((short)sample.BlockAlign);
waveStream.Write((short)sample.BitsPerSample);
waveStream.Write("data");
waveStream.Write((int)size);
waveStream.Write(DecodeWave(stream.ReadBytes(size)));
sample.Payload = waveStream.ToArray();
}
waveSamples.Add(sample.Id, sample);
}
}
var oggSamples = new Dictionary <int, OJM.OMC.OggSample>();
stream.Seek(oggOffset, SeekOrigin.Begin);
for (short i = 1000; i < oggCount + 1000; i++)
{
var sample = new OJM.OMC.OggSample()
{
Id = i,
Name = stream.ReadString(32)
};
int size = stream.ReadInt32();
if (size > 0)
{
sample.Payload = stream.ReadBytes(size);
oggSamples.Add(sample.Id, sample);
}
}
omc.WaveSamples = waveSamples;
omc.OggSamples = oggSamples;
return(omc);
}
}
public static byte[] Encode(OJM.OMC omc)
{
using (var stream = new BufferStream())
{
stream.Write("OMC\0");
stream.Write(omc.WaveCount);
stream.Write(omc.OggCount);
stream.Write(omc.WaveOffset);
stream.Write(omc.OggOffset);
stream.Write(omc.FileSize);
stream.Seek(omc.WaveOffset, SeekOrigin.Begin);
for (short i = 0; i < omc.WaveSamples.Max((sample) => sample.Value.Id); i++)
{
OJM.OMC.WaveSample sample = null;
string name = string.Empty.PadNull(32);
short audioFormat = 0;
short channelCount = 0;
int sampleRate = 0;
int bitrate = 0;
short blockAlign = 0;
short bitsPerSample = 0;
int unkData = 0;
int size = 0;
if (omc.WaveSamples.ContainsKey(i))
{
sample = omc.WaveSamples[i];
name = sample.Name.PadNull(32);
audioFormat = sample.AudioFormat;
channelCount = sample.ChannelCount;
sampleRate = sample.SampleRate;
bitrate = sample.Bitrate;
blockAlign = sample.BlockAlign;
bitsPerSample = sample.BitsPerSample;
unkData = sample.UnkData;
size = sample.Size;
}
stream.Write(name);
stream.Write(audioFormat);
stream.Write(channelCount);
stream.Write(sampleRate);
stream.Write(bitrate);
stream.Write(blockAlign);
stream.Write(bitsPerSample);
stream.Write(unkData);
stream.Write(size);
if (sample != null && size > 0)
{
byte[] payload = sample.Payload;
var info = EncodeTo <WavEncoder>(payload);
sample.Payload = payload;
using (var waveStream = new BufferStream(payload))
{
waveStream.Seek(44, SeekOrigin.Begin);
stream.Write(EncodeWave(waveStream.ReadRemaining()));
}
}
}
stream.Seek(omc.OggOffset, SeekOrigin.Begin);
for (short i = 1000; i < omc.OggSamples.Max((sample) => sample.Value.Id); i++)
{
var sample = omc.OggSamples.ContainsKey(i) ? omc.OggSamples[i] : null;
if (sample == null)
{
continue;
}
stream.Write(sample.Name.PadNull(32));
if (sample.Size > 0)
{
byte[] payload = sample.Payload;
EncodeTo <OggEncoder>(payload);
sample.Payload = payload;
stream.Write(sample.Size);
stream.Write(payload);
}
}
return(stream.ToArray());
}
}