private static DmaChain ReadDmaChain(Stream stream, DmaChainHeader dmaChainHeader)
{
var dmaVifs = new List <DmaVif>();
var count1a = stream.SetPosition(dmaChainHeader.Count1aOffset).ReadInt32();
var alv1 = For(count1a, () => stream.ReadInt32()).ToList();
var offsetDmaPackets = new List <int>();
var alaxi = new List <int[]>();
var alaxref = new List <int>();
offsetDmaPackets.Add(dmaChainHeader.DmaOffset);
var offsetDmaBase = dmaChainHeader.DmaOffset + 0x10;
for (var i = 0; i < count1a; i++)
{
if (alv1[i] == -1)
{
offsetDmaPackets.Add(offsetDmaBase + 0x10);
offsetDmaBase += 0x20;
alaxi.Add(alaxref.ToArray());
alaxref.Clear();
}
else
{
offsetDmaBase += 0x10;
alaxref.Add(alv1[i]);
}
}
alaxi.Add(alaxref.ToArray());
alaxref.Clear();
var dmaPackets = offsetDmaPackets
.Select(offset => ReadTags(stream.SetPosition(offset)).ToArray())
.ToArray();
for (var i = 0; i < offsetDmaPackets.Count; i++)
{
var dmaTag = dmaPackets[i][0].DmaTag;
var baseAddress = dmaTag.Qwc != 0 ? dmaPackets[i][1].Parameter : 0;
stream.Position = dmaTag.Address & 0x7FFFFFFF;
var vifPacket = stream.ReadBytes(dmaTag.Qwc * 0x10);
dmaVifs.Add(new DmaVif(dmaChainHeader.TextureIndex, alaxi[i], vifPacket, baseAddress));
}
return(new DmaChain
{
Unk00 = dmaChainHeader.Unk00,
TextureIndex = dmaChainHeader.TextureIndex,
Unk08 = dmaChainHeader.Unk08,
DmaLength = dmaChainHeader.DmaLength,
DmaVifs = dmaVifs,
});
}
private static DmaChainHeader WriteDmaChain(Stream stream, DmaChain dmaChain)
{
var dmaChainHeader = new DmaChainHeader
{
Unk00 = dmaChain.Unk00,
TextureIndex = dmaChain.TextureIndex,
Unk08 = dmaChain.Unk08,
DmaLength = dmaChain.DmaLength,
};
var dmaVifs = dmaChain.DmaVifs;
var vifPacketOffsets = new List <int>();
foreach (var dmaVif in dmaVifs)
{
vifPacketOffsets.Add((int)stream.Position);
stream.Write(dmaVif.VifPacket);
}
dmaChainHeader.DmaOffset = (int)stream.Position;
for (var i = 0; i < dmaVifs.Count; i++)
{
if (dmaVifs[i].BaseAddress > 0)
{
BinaryMapping.WriteObject(stream, new DmaPacket
{
DmaTag = new DmaTag
{
Qwc = (ushort)(dmaVifs[i].VifPacket.Length / 0x10),
TagId = 3,
Irq = false,
Address = vifPacketOffsets[i]
},
VifCode = new VifCode {
},
Parameter = 0
});
for (var j = 0; j < dmaVifs[i].Alaxi.Length; j++)
{
BinaryMapping.WriteObject(stream, new DmaPacket
{
DmaTag = new DmaTag
{
Qwc = 4,
TagId = 3,
Irq = false,
Address = dmaVifs[i].Alaxi[j]
},
VifCode = DefaultVifCode,
Parameter = dmaVifs[i].BaseAddress + j * 4
});
}
}
BinaryMapping.WriteObject(stream, CloseDmaPacket);
}
var alv1 = new List <int>();
foreach (var vif in dmaVifs)
{
alv1.AddRange(vif.Alaxi);
alv1.Add(-1);
}
alv1.RemoveAt(alv1.Count - 1);
dmaChainHeader.Count1aOffset = (int)stream.Position;
stream.Write(alv1.Count);
foreach (var alvItem in alv1)
{
stream.Write(alvItem);
}
stream.AlignPosition(0x10);
return(dmaChainHeader);
}
