public static Clip ReadClip(ChunkReader reader)
{
// index
var index = reader.ReadUInt32();
// first subchunk header
var type = reader.ReadID<ClipType>();
var subchunk_size = reader.ReadUInt16();
subchunk_size += (ushort)(subchunk_size & 1);
Clip clip = null;
using (var subChunkReader = reader.GetSubChunk(subchunk_size))
{
switch (type)
{
case ClipType.ID_STIL:
{
var tmp_clip = new ClipStill(index);
tmp_clip.Name = subChunkReader.ReadString();
clip = tmp_clip;
break;
}
case ClipType.ID_ISEQ:
{
var tmp_clip = new ClipSequence(index);
tmp_clip.Digits = subChunkReader.ReadUInt8();
tmp_clip.Flags = subChunkReader.ReadUInt8();
tmp_clip.Offset = subChunkReader.ReadSInt16();
subChunkReader.ReadUInt16(); // Legacy Cruft: Nothing to see here
tmp_clip.Start = subChunkReader.ReadSInt16();
tmp_clip.End = subChunkReader.ReadSInt16();
tmp_clip.Prefix = subChunkReader.ReadString();
tmp_clip.Suffix = subChunkReader.ReadString();
clip = tmp_clip;
break;
}
case ClipType.ID_ANIM:
{
var tmp_clip = new ClipAnim(index);
tmp_clip.Name = subChunkReader.ReadString();
tmp_clip.Server = subChunkReader.ReadString();
tmp_clip.Data = subChunkReader.ReadBytes((uint)subChunkReader.BytesLeft);
clip = tmp_clip;
break;
}
case ClipType.ID_XREF:
{
var tmp_clip = new ClipCloned(index);
tmp_clip.clip_reference_index = subChunkReader.ReadUInt32();
tmp_clip.Name = subChunkReader.ReadString();
clip = tmp_clip;
break;
}
case ClipType.ID_STCC:
{
var tmp_clip = new ClipColorCycle(index);
tmp_clip.lo = subChunkReader.ReadSInt16();
tmp_clip.hi = subChunkReader.ReadSInt16();
tmp_clip.Name = subChunkReader.ReadString();
clip = tmp_clip;
break;
}
default:
throw new Exception("Unknown Clip type"); // TODO: create proper exception class for this ...
}
}
while (reader.BytesLeft > 0)
{
// process subchunks as they're encountered
var id = reader.ReadID<ClipDataType>();
subchunk_size = reader.ReadUInt16();
subchunk_size += (ushort)(subchunk_size & 1);
using (var subChunkReader = reader.GetSubChunk(subchunk_size))
{
switch (id)
{
//case ClipDataType.ID_CLRS: // Color Space RGB - CLRS { flags[U2], colorspace[U2], filename[FNAM0] }
//case ClipDataType.ID_CLRA: // Color Space Alpha - CLRA { flags[U2], colorspace[U2], filename[FNAM0] }
//case ClipDataType.ID_FILT: // Image Filtering - FILT { flags[U2] }
//case ClipDataType.ID_DITH: // Image Dithering - DITH { flags[U2] }
// Contrast - CONT { contrast-delta[FP4], envelope[VX] }
case ClipDataType.ID_CONT: { clip.Contrast.value = subChunkReader.ReadSingle(); clip.Contrast.envelope_index = subChunkReader.ReadVariableLengthIndex(); break; }
// Brightness - BRIT { brightness-delta[FP4], envelope[VX] }
case ClipDataType.ID_BRIT: { clip.Brightness.value = subChunkReader.ReadSingle(); clip.Brightness.envelope_index = subChunkReader.ReadVariableLengthIndex(); break; }
// Saturation - SATR { saturation-delta[FP4], envelope[VX] }
case ClipDataType.ID_SATR: { clip.Saturation.value = subChunkReader.ReadSingle(); clip.Saturation.envelope_index = subChunkReader.ReadVariableLengthIndex(); break; }
// Hue - HUE { hue-rotation[FP4], envelope[VX] }
case ClipDataType.ID_HUE: { clip.Hue.value = subChunkReader.ReadSingle(); clip.Hue.envelope_index = subChunkReader.ReadVariableLengthIndex(); break; }
// Gamma Correction - GAMM { gamma[F4], envelope[VX] }
case ClipDataType.ID_GAMM: { clip.Gamma.value = subChunkReader.ReadSingle(); clip.Gamma.envelope_index = subChunkReader.ReadVariableLengthIndex(); break; }
// Negative - NEGA { enable[U2] }
case ClipDataType.ID_NEGA: { clip.Negative = subChunkReader.ReadUInt16() != 0; break; }
// Time - TIME { start-time[FP4], duration[FP4], frame-rate[FP4] }
case ClipDataType.ID_TIME:
{
clip.StartTime = subChunkReader.ReadSingle();
clip.Duration = subChunkReader.ReadSingle();
clip.FrameRate = subChunkReader.ReadSingle();
break;
}
// Plug-in Image Filters - IFLT { server-name[S0], flags[U2], data[...] }
case ClipDataType.ID_IFLT:
// Plug-in Pixel Filters - PFLT { server-name[S0], flags[U2], data[...] }
case ClipDataType.ID_PFLT:
{
var filt = new LightwavePlugin();
filt.name = subChunkReader.ReadString();
filt.flags = subChunkReader.ReadUInt16();
filt.data = subChunkReader.ReadBytes((uint)subChunkReader.BytesLeft);
if (id == ClipDataType.ID_IFLT)
clip.ImageFilters.Add(filt);
else
clip.PixelFilters.Add(filt);
break;
}
case ClipDataType.ID_FLAG: // not mentioned in documentation ...
var flags = subChunkReader.ReadUInt16(); // unknown what they mean ...
break;
default:
Console.WriteLine("Unknown clip type " + reader.GetIDString((uint)id));
break;
}
}
}
return clip;
}
//======================================================================
// AddClip()
//
// Add a clip to the clip list. Used to store the contents of an RIMG or
// TIMG surface subchunk.
//======================================================================
static uint AddClip(string src, List<Clip> clist)
{
int pos = src.IndexOf("(sequence)");
if (pos != -1)
{
var clip = new ClipSequence((uint)clist.Count);
clip.Prefix = src.Substring(pos);
clip.Digits = 3;
clist.Add(clip);
return clip.Index;
} else
{
var clip = new ClipStill((uint)clist.Count);
clip.Name = src;
clist.Add(clip);
return clip.Index;
}
}