virtual public MMChunk CreateSubChunk(FourCC fourCC, Stream st)
{
if ( fourCC == FourCC.Riff )
{
MMChunk ck = new RiffChunk(st);
m_chunkList.Add(ck);
return ck;
}
else if ( fourCC == FourCC.Wave )
{
MMChunk ck = new WaveChunk(st);
m_chunkList.Add(ck);
return ck;
}
else if ( fourCC == FourCC.Fmt )
{
MMChunk ck = new FmtChunk(st, null);
m_chunkList.Add(ck);
return ck;
}
else if ( fourCC == FourCC.Data )
{
MMChunk ck = new DataChunk(st);
m_chunkList.Add(ck);
return ck;
}
return null;
}
public MMChunk FindChunk(FourCC fcc)
{
foreach(MMChunk ck in m_chunkList)
{
if ( ck.FourCC == fcc )
{
return ck;
}
}
return null;
}
public MMChunk(FourCC fourCC, Stream st)
{
m_fourCC = fourCC;
m_nSize = 0;
m_bDirty = false;
m_str = st;
m_posCurrent = st.Position;
m_posStart = st.Position;
m_chunkList = new ArrayList();
m_ckType = ChunkType.Riff;
}
public MMChunk(FourCC fourCC, Stream st)
{
m_fourCC = fourCC;
m_nSize = 0;
m_bDirty = false;
m_str = st;
m_posCurrent = st.Position;
m_posStart = st.Position;
m_chunkList = new ArrayList();
m_ckType = ChunkType.Riff;
}
public MMChunk FindChunk(FourCC fcc)
{
foreach (MMChunk ck in m_chunkList)
{
if (ck.FourCC == fcc)
{
return(ck);
}
}
return(null);
}
public override bool Equals(object obj)
{
if (obj is FourCC)
{
FourCC fcc = (FourCC)obj;
//return fcc.m_c1 = c1 && fcc.m_c2 = c2 && fcc.m_c3 = c3 && fcc.m_c4 = c4;
return(fcc.GetFourCC() == GetFourCC());
}
else
{
return(base.Equals(obj));
}
}
public override MMChunk CreateSubChunk(FourCC fourCC, Stream st)
{
MMChunk ck = base.CreateSubChunk(fourCC, st);
int size = 0;
foreach (MMChunk cck in m_chunkList)
{
if (cck != ck)
{
size += cck.GetSize();
}
}
ck.SetStart(m_posStart + 4 + size);
return(ck);
}
static public MMChunk FromStream(Stream st)
{
if (!st.CanRead)
{
return(null);
}
if (st.Position > st.Length - 4)
{
return(null);
}
byte[] data = new byte[4];
st.Read(data, 0, 4);
FourCC fourCC = BitConverter.ToInt32(data, 0);
if (fourCC == FourCC.Riff)
{
RiffChunk ck = new RiffChunk(st);
ck.LoadFromStream(st);
return(ck);
}
else if (fourCC == FourCC.Wave)
{
WaveChunk ck = new WaveChunk(st);
ck.LoadFromStream(st);
return(ck);
}
else if (fourCC == FourCC.Fmt)
{
FmtChunk ck = new FmtChunk(st, null);
ck.LoadFromStream(st);
return(ck);
}
else if (fourCC == FourCC.Data)
{
DataChunk ck = new DataChunk(st);
ck.LoadFromStream(st);
return(ck);
}
else
{
return(new MMChunk(fourCC, st));
}
}
public _RiffChunk(FourCC fourCC, Stream st) : base(fourCC, st)
{
m_ckType = ChunkType.Riff;
}
public ListChunk(FourCC fourCC, Stream st) : base(fourCC, st)
{
m_ckType = ChunkType.List;
}
public _RiffChunk(FourCC fourCC, Stream st): base(fourCC, st)
{
m_ckType = ChunkType.Riff;
}