// Predict snapshot from baselines. Returns true if prediction is different from baseline 0 (if it need to be automatically predicted next frame).
public static void PredictSnapshot(byte[] outputData, byte[] fieldsChangedPrediction, NetworkSchema schema, uint numBaselines, uint time0, byte[] baselineData0, uint time1, byte[] baselineData1, uint time2, byte[] baselineData2, uint time, byte fieldMask)
{
for (int i = 0, l = fieldsChangedPrediction.Length; i < l; ++i)
{
fieldsChangedPrediction[i] = 0;
}
if (numBaselines < 3)
{
System.Array.Copy(baselineData0, outputData, schema.GetByteSize());
return;
}
var baselineStream0 = new ByteInputStream(baselineData0);
var baselineStream1 = new ByteInputStream(baselineData1);
var baselineStream2 = new ByteInputStream(baselineData2);
var outputStream = new ByteOutputStream(outputData);
for (int i = 0; i < schema.fields.Count; ++i)
{
GameDebug.Assert(schema.fields[i].byteOffset == baselineStream0.GetBytePosition());
GameDebug.Assert(schema.fields[i].byteOffset == baselineStream1.GetBytePosition());
GameDebug.Assert(schema.fields[i].byteOffset == baselineStream2.GetBytePosition());
var field = schema.fields[i];
byte fieldByteOffset = (byte)((uint)i >> 3);
byte fieldBitOffset = (byte)((uint)i & 0x7);
bool masked = (field.fieldMask & fieldMask) != 0;
switch (field.fieldType)
{
case NetworkSchema.FieldType.Bool:
{
uint baseline0 = baselineStream0.ReadUInt8();
uint baseline1 = baselineStream1.ReadUInt8();
uint baseline2 = baselineStream2.ReadUInt8();
uint prediction = baseline0;
if (!masked)
{
if (baseline0 != baseline1 && baseline1 != baseline2)
{
fieldsChangedPrediction[fieldByteOffset] |= (byte)(1 << fieldBitOffset);
}
}
outputStream.WriteUInt8((byte)prediction);
break;
}
case NetworkSchema.FieldType.UInt:
case NetworkSchema.FieldType.Int:
case NetworkSchema.FieldType.Float:
{
uint baseline0 = (uint)baselineStream0.ReadBits(field.bits);
uint baseline1 = (uint)baselineStream1.ReadBits(field.bits);
uint baseline2 = (uint)baselineStream2.ReadBits(field.bits);
uint prediction = baseline0;
if (!masked)
{
if (field.delta)
{
bool predictionLikelyWrong;
prediction = NetworkPrediction.PredictUint(numBaselines, time0, baseline0, time1, baseline1, time2, baseline2, time, out predictionLikelyWrong);
if (predictionLikelyWrong)
{
fieldsChangedPrediction[fieldByteOffset] |= (byte)(1 << fieldBitOffset);
}
}
else
{
if (baseline0 != baseline1 && baseline1 != baseline2)
{
fieldsChangedPrediction[fieldByteOffset] |= (byte)(1 << fieldBitOffset);
}
}
}
outputStream.WriteBits(prediction, field.bits); //RUTODO: fix this
break;
}
case NetworkSchema.FieldType.Vector2:
{
uint bx0 = baselineStream0.ReadUInt32();
uint by0 = baselineStream0.ReadUInt32();
uint bx1 = baselineStream1.ReadUInt32();
uint by1 = baselineStream1.ReadUInt32();
uint bx2 = baselineStream2.ReadUInt32();
uint by2 = baselineStream2.ReadUInt32();
uint px = bx0;
uint py = by0;
if (!masked)
{
if (field.delta)
{
bool predictionLikelyWrongX;
bool predictionLikelyWrongY;
px = NetworkPrediction.PredictUint(numBaselines, time0, bx0, time1, bx1, time2, bx2, time, out predictionLikelyWrongX);
py = NetworkPrediction.PredictUint(numBaselines, time0, by0, time1, by1, time2, by2, time, out predictionLikelyWrongY);
if (predictionLikelyWrongX || predictionLikelyWrongY)
{
fieldsChangedPrediction[fieldByteOffset] |= (byte)(1 << fieldBitOffset);
}
}
else
{
if ((bx0 != bx1 || by0 != by1) && (bx1 != bx2 || by1 != by2))
{
fieldsChangedPrediction[fieldByteOffset] |= (byte)(1 << fieldBitOffset);
}
}
}
outputStream.WriteUInt32(px);
outputStream.WriteUInt32(py);
break;
}
case NetworkSchema.FieldType.Vector3:
{
uint bx0 = baselineStream0.ReadUInt32();
uint by0 = baselineStream0.ReadUInt32();
uint bz0 = baselineStream0.ReadUInt32();
uint bx1 = baselineStream1.ReadUInt32();
uint by1 = baselineStream1.ReadUInt32();
uint bz1 = baselineStream1.ReadUInt32();
uint bx2 = baselineStream2.ReadUInt32();
uint by2 = baselineStream2.ReadUInt32();
uint bz2 = baselineStream2.ReadUInt32();
uint px = bx0;
uint py = by0;
uint pz = bz0;
if (!masked)
{
if (field.delta)
{
bool predictionLikelyWrongX;
bool predictionLikelyWrongY;
bool predictionLikelyWrongZ;
px = NetworkPrediction.PredictUint(numBaselines, time0, bx0, time1, bx1, time2, bx2, time, out predictionLikelyWrongX);
py = NetworkPrediction.PredictUint(numBaselines, time0, by0, time1, by1, time2, by2, time, out predictionLikelyWrongY);
pz = NetworkPrediction.PredictUint(numBaselines, time0, bz0, time1, bz1, time2, bz2, time, out predictionLikelyWrongZ);
if (predictionLikelyWrongX || predictionLikelyWrongY || predictionLikelyWrongZ)
{
fieldsChangedPrediction[fieldByteOffset] |= (byte)(1 << fieldBitOffset);
}
}
else
{
if ((bx0 != bx1 || by0 != by1 || bz0 != bz1) && (bx1 != bx2 || by1 != by2 || bz1 != bz2))
{
fieldsChangedPrediction[fieldByteOffset] |= (byte)(1 << fieldBitOffset);
}
}
}
outputStream.WriteUInt32(px);
outputStream.WriteUInt32(py);
outputStream.WriteUInt32(pz);
break;
}
case NetworkSchema.FieldType.Quaternion:
{
uint bx0 = baselineStream0.ReadUInt32();
uint by0 = baselineStream0.ReadUInt32();
uint bz0 = baselineStream0.ReadUInt32();
uint bw0 = baselineStream0.ReadUInt32();
uint bx1 = baselineStream1.ReadUInt32();
uint by1 = baselineStream1.ReadUInt32();
uint bz1 = baselineStream1.ReadUInt32();
uint bw1 = baselineStream1.ReadUInt32();
uint bx2 = baselineStream2.ReadUInt32();
uint by2 = baselineStream2.ReadUInt32();
uint bz2 = baselineStream2.ReadUInt32();
uint bw2 = baselineStream2.ReadUInt32();
uint px = bx0;
uint py = by0;
uint pz = bz0;
uint pw = bw0;
if (!masked)
{
if (field.delta)
{
bool predictionLikelyWrongX;
bool predictionLikelyWrongY;
bool predictionLikelyWrongZ;
bool predictionLikelyWrongW;
px = NetworkPrediction.PredictUint(numBaselines, time0, bx0, time1, bx1, time2, bx2, time, out predictionLikelyWrongX);
py = NetworkPrediction.PredictUint(numBaselines, time0, by0, time1, by1, time2, by2, time, out predictionLikelyWrongY);
pz = NetworkPrediction.PredictUint(numBaselines, time0, bz0, time1, bz1, time2, bz2, time, out predictionLikelyWrongZ);
pw = NetworkPrediction.PredictUint(numBaselines, time0, bw0, time1, bw1, time2, bw2, time, out predictionLikelyWrongW);
if (predictionLikelyWrongX || predictionLikelyWrongY || predictionLikelyWrongZ || predictionLikelyWrongW)
{
fieldsChangedPrediction[fieldByteOffset] |= (byte)(1 << fieldBitOffset);
}
}
else
{
if ((bx0 != bx1 || by0 != by1 || bz0 != bz1 || bw0 != bw1) && (bx1 != bx2 || by1 != by2 || bz1 != bz2 || bw1 != bw2))
{
fieldsChangedPrediction[fieldByteOffset] |= (byte)(1 << fieldBitOffset);
}
}
}
outputStream.WriteUInt32(px);
outputStream.WriteUInt32(py);
outputStream.WriteUInt32(pz);
outputStream.WriteUInt32(pw);
break;
}
case NetworkSchema.FieldType.String:
case NetworkSchema.FieldType.ByteArray:
{
baselineStream1.SkipByteArray(field.arraySize);
baselineStream2.SkipByteArray(field.arraySize);
outputStream.CopyByteArray(ref baselineStream0, field.arraySize);
//TODO: predict me!
}
break;
}
}
//fieldsChangedPrediction = 0;
outputStream.Flush();
}
public static int Read <TInputStream>(ref TInputStream input, NetworkSchema schema, byte[] outputData, byte[] baselineData, byte[] fieldsChangedPrediction, byte fieldMask, ref uint hash) where TInputStream : NetworkCompression.IInputStream
{
GameDebug.Assert(baselineData != null);
var outputStream = new ByteOutputStream(outputData);
var baselineStream = new ByteInputStream(baselineData);
int numFields = schema.fields.Count;
int skipContext = schema.id * NetworkConfig.maxContextsPerSchema + NetworkConfig.firstSchemaContext;
for (int i = 0; i * 8 < numFields; i++)
{
uint value = input.ReadPackedNibble(skipContext + 2 * i + 0);
value |= input.ReadPackedNibble(skipContext + 2 * i + 1) << 4;
fieldsNotPredicted[i] = (byte)(value ^ fieldsChangedPrediction[i]);
}
for (int i = 0; i < numFields; ++i)
{
GameDebug.Assert(schema.fields[i].byteOffset == baselineStream.GetBytePosition());
int fieldStartContext = schema.fields[i].startContext;
var field = schema.fields[i];
byte fieldByteOffset = (byte)((uint)i >> 3);
byte fieldBitOffset = (byte)((uint)i & 0x7);
bool skip = (fieldsNotPredicted[fieldByteOffset] & (1 << fieldBitOffset)) == 0;
bool masked = ((field.fieldMask & fieldMask) != 0);
skip = skip || masked;
switch (field.fieldType)
{
case NetworkSchema.FieldType.Bool:
{
uint value = baselineStream.ReadUInt8();
if (!skip)
{
value = input.ReadRawBits(1);
}
if (!masked)
{
hash = NetworkUtils.SimpleHashStreaming(hash, value);
}
outputStream.WriteUInt8((byte)value);
break;
}
case NetworkSchema.FieldType.UInt:
case NetworkSchema.FieldType.Int:
case NetworkSchema.FieldType.Float:
{
uint baseline = (uint)baselineStream.ReadBits(field.bits);
uint value = baseline;
if (!skip)
{
if (field.delta)
{
value = input.ReadPackedUIntDelta(baseline, fieldStartContext);
}
else
{
value = input.ReadRawBits(field.bits);
}
}
if (!masked)
{
hash = NetworkUtils.SimpleHashStreaming(hash, value);
}
outputStream.WriteBits(value, field.bits); //RUTODO: fix this
break;
}
case NetworkSchema.FieldType.Vector2:
{
uint bx = baselineStream.ReadUInt32();
uint by = baselineStream.ReadUInt32();
uint vx = bx;
uint vy = by;
if (!skip)
{
if (field.delta)
{
vx = input.ReadPackedUIntDelta(bx, fieldStartContext + 0);
vy = input.ReadPackedUIntDelta(by, fieldStartContext + 1);
}
else
{
vx = input.ReadRawBits(field.bits);
vy = input.ReadRawBits(field.bits);
}
}
if (!masked)
{
hash = NetworkUtils.SimpleHashStreaming(hash, vx);
hash = NetworkUtils.SimpleHashStreaming(hash, vy);
}
outputStream.WriteUInt32(vx);
outputStream.WriteUInt32(vy);
break;
}
case NetworkSchema.FieldType.Vector3:
{
uint bx = baselineStream.ReadUInt32();
uint by = baselineStream.ReadUInt32();
uint bz = baselineStream.ReadUInt32();
uint vx = bx;
uint vy = by;
uint vz = bz;
if (!skip)
{
if (field.delta)
{
vx = input.ReadPackedUIntDelta(bx, fieldStartContext + 0);
vy = input.ReadPackedUIntDelta(by, fieldStartContext + 1);
vz = input.ReadPackedUIntDelta(bz, fieldStartContext + 2);
}
else
{
vx = input.ReadRawBits(field.bits);
vy = input.ReadRawBits(field.bits);
vz = input.ReadRawBits(field.bits);
}
}
if (!masked)
{
hash = NetworkUtils.SimpleHashStreaming(hash, vx);
hash = NetworkUtils.SimpleHashStreaming(hash, vy);
hash = NetworkUtils.SimpleHashStreaming(hash, vz);
}
outputStream.WriteUInt32(vx);
outputStream.WriteUInt32(vy);
outputStream.WriteUInt32(vz);
break;
}
case NetworkSchema.FieldType.Quaternion:
{
uint bx = baselineStream.ReadUInt32();
uint by = baselineStream.ReadUInt32();
uint bz = baselineStream.ReadUInt32();
uint bw = baselineStream.ReadUInt32();
uint vx = bx;
uint vy = by;
uint vz = bz;
uint vw = bw;
if (!skip)
{
if (field.delta)
{
vx = input.ReadPackedUIntDelta(bx, fieldStartContext + 0);
vy = input.ReadPackedUIntDelta(by, fieldStartContext + 1);
vz = input.ReadPackedUIntDelta(bz, fieldStartContext + 2);
vw = input.ReadPackedUIntDelta(bw, fieldStartContext + 3);
//RUTODO: normalize
}
else
{
vx = input.ReadRawBits(field.bits);
vy = input.ReadRawBits(field.bits);
vz = input.ReadRawBits(field.bits);
vw = input.ReadRawBits(field.bits);
}
}
if (!masked)
{
hash = NetworkUtils.SimpleHashStreaming(hash, vx);
hash = NetworkUtils.SimpleHashStreaming(hash, vy);
hash = NetworkUtils.SimpleHashStreaming(hash, vz);
hash = NetworkUtils.SimpleHashStreaming(hash, vw);
}
outputStream.WriteUInt32(vx);
outputStream.WriteUInt32(vy);
outputStream.WriteUInt32(vz);
outputStream.WriteUInt32(vw);
break;
}
case NetworkSchema.FieldType.String:
case NetworkSchema.FieldType.ByteArray:
{
// TODO : Do a better job with deltaing strings and buffers
if (!skip)
{
baselineStream.SkipByteArray(field.arraySize);
outputStream.CopyByteArray <TInputStream>(ref input, field.arraySize, fieldStartContext);
}
else
{
outputStream.CopyByteArray(ref baselineStream, field.arraySize);
}
if (!masked)
{
hash += 0; // TODO (hash strings and bytearrays as well)
}
}
break;
}
}
outputStream.Flush();
return(outputStream.GetBytePosition());
}