private void SerializeCompressedData(FAssetArchive Ar)
{
// These fields were serialized as properties in pre-UE4.12 engine version
KeyEncodingFormat = Ar.Read <AnimationKeyFormat>();
TranslationCompressionFormat = Ar.Read <AnimationCompressionFormat>();
RotationCompressionFormat = Ar.Read <AnimationCompressionFormat>();
ScaleCompressionFormat = Ar.Read <AnimationCompressionFormat>();
CompressedTrackOffsets = Ar.ReadArray <int>();
CompressedScaleOffsets = new FCompressedOffsetData(Ar);
if (Ar.Game >= EGame.GAME_UE4_21)
{
// UE4.21+ - added compressed segments; disappeared in 4.23
CompressedSegments = Ar.ReadArray <FCompressedSegment>();
if (CompressedSegments.Length > 0)
{
Log.Information("animation has CompressedSegments!");
}
}
CompressedTrackToSkeletonMapTable = Ar.ReadArray <FTrackToSkeletonMap>();
if (Ar.Game < EGame.GAME_UE4_22)
{
CompressedCurveData = new FStructFallback(Ar, "RawCurveTracks");
}
else
{
var compressedCurveNames = Ar.ReadArray(() => new FSmartName(Ar));
}
if (Ar.Game >= EGame.GAME_UE4_17)
{
// UE4.17+
var compressedRawDataSize = Ar.Read <int>();
}
if (Ar.Game >= EGame.GAME_UE4_22)
{
var compressedNumFrames = Ar.Read <int>();
}
// compressed data
var numBytes = Ar.Read <int>();
CompressedByteStream = Ar.ReadBytes(numBytes);
if (Ar.Game >= EGame.GAME_UE4_22)
{
var curveCodecPath = Ar.ReadFString();
var compressedCurveByteStream = Ar.ReadArray <byte>();
}
// Fix layout of "byte swapped" data (workaround for UE4 bug)
if (KeyEncodingFormat == AnimationKeyFormat.AKF_PerTrackCompression && CompressedScaleOffsets.OffsetData.Length > 0 && Ar.Game < EGame.GAME_UE4_23)
{
throw new NotImplementedException();
}
}
// UE4.23-4.24 has changed compressed data layout for streaming, so it's worth making a separate
// serializer function for it.
private void SerializeCompressedData2(FAssetArchive Ar)
{
var compressedRawDataSize = Ar.Read <int>();
CompressedTrackToSkeletonMapTable = Ar.ReadArray <FTrackToSkeletonMap>();
var compressedCurveNames = Ar.ReadArray(() => new FSmartName(Ar));
// Since 4.23, this is FUECompressedAnimData::SerializeCompressedData
KeyEncodingFormat = Ar.Read <AnimationKeyFormat>();
TranslationCompressionFormat = Ar.Read <AnimationCompressionFormat>();
RotationCompressionFormat = Ar.Read <AnimationCompressionFormat>();
ScaleCompressionFormat = Ar.Read <AnimationCompressionFormat>();
var compressedNumFrames = Ar.Read <int>();
// SerializeView() just serializes array size
var compressedTrackOffsetsNum = Ar.Read <int>();
var compressedScaleOffsetsNum = Ar.Read <int>();
CompressedScaleOffsets = new FCompressedOffsetData(Ar.Read <int>());
var compressedByteStreamNum = Ar.Read <int>();
// ... end of FUECompressedAnimData::SerializeCompressedData
var numBytes = Ar.Read <int>();
var bUseBulkDataForLoad = Ar.ReadBoolean();
// In UE4.23 CompressedByteStream field exists in FUECompressedAnimData (as TArrayView) and in
// FCompressedAnimSequence (as byte array). Serialization is done in FCompressedAnimSequence,
// either as TArray or as bulk, and then array is separated onto multiple "views" for
// FUECompressedAnimData. We'll use a different name for "joined" serialized array here to
// avoid confuse.
byte[] serializedByteStream;
if (bUseBulkDataForLoad)
{
throw new NotImplementedException("Anim: bUseBulkDataForLoad not implemented");
//todo: read from bulk to serializedByteStream
}
else
{
serializedByteStream = Ar.ReadBytes(numBytes);
}
// Setup all array views from single array. In UE4 this is done in FUECompressedAnimData::InitViewsFromBuffer.
// We'll simply copy array data away from SerializedByteStream, and then SerializedByteStream
// will be released from memory as it is a local variable here.
// Note: copying is not byte-order wise, so if there will be any problems in the future,
// should use byte swap functions.
using (var tempAr = new FByteArchive("SerializedByteStream", serializedByteStream, Ar.Versions))
{
CompressedTrackOffsets = tempAr.ReadArray <int>(compressedTrackOffsetsNum);
CompressedScaleOffsets.OffsetData = tempAr.ReadArray <int>(compressedScaleOffsetsNum);
CompressedByteStream = tempAr.ReadBytes(compressedByteStreamNum);
}
var curveCodecPath = Ar.ReadFString();
var compressedCurveByteStream = Ar.ReadArray <byte>();
}