mirror of
https://github.com/Ryujinx/Ryujinx.git
synced 2024-11-14 03:56:41 +00:00
1160 lines
42 KiB
C#
1160 lines
42 KiB
C#
using Ryujinx.Common.Memory;
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using Ryujinx.Graphics.Nvdec.Vp9.Dsp;
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using Ryujinx.Graphics.Nvdec.Vp9.Types;
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using Ryujinx.Graphics.Video;
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using System;
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using System.Diagnostics;
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using System.Runtime.CompilerServices;
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using Mv = Ryujinx.Graphics.Nvdec.Vp9.Types.Mv;
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using MvRef = Ryujinx.Graphics.Nvdec.Vp9.Types.MvRef;
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namespace Ryujinx.Graphics.Nvdec.Vp9
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{
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internal static class DecodeMv
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{
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private const int MvrefNeighbours = 8;
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private static PredictionMode ReadIntraMode(ref Reader r, ReadOnlySpan<byte> p)
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{
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return (PredictionMode)r.ReadTree(Luts.Vp9IntraModeTree, p);
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}
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private static PredictionMode ReadIntraModeY(ref Vp9Common cm, ref MacroBlockD xd, ref Reader r, int sizeGroup)
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{
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PredictionMode yMode = ReadIntraMode(ref r, cm.Fc.Value.YModeProb[sizeGroup].AsSpan());
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if (!xd.Counts.IsNull)
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{
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++xd.Counts.Value.YMode[sizeGroup][(int)yMode];
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}
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return yMode;
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}
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private static PredictionMode ReadIntraModeUv(ref Vp9Common cm, ref MacroBlockD xd, ref Reader r, byte yMode)
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{
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PredictionMode uvMode = ReadIntraMode(ref r, cm.Fc.Value.UvModeProb[yMode].AsSpan());
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if (!xd.Counts.IsNull)
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{
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++xd.Counts.Value.UvMode[yMode][(int)uvMode];
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}
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return uvMode;
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}
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private static PredictionMode ReadInterMode(ref Vp9Common cm, ref MacroBlockD xd, ref Reader r, int ctx)
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{
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int mode = r.ReadTree(Luts.Vp9InterModeTree, cm.Fc.Value.InterModeProb[ctx].AsSpan());
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if (!xd.Counts.IsNull)
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{
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++xd.Counts.Value.InterMode[ctx][mode];
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}
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return PredictionMode.NearestMv + mode;
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}
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private static int ReadSegmentId(ref Reader r, ref Array7<byte> segTreeProbs)
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{
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return r.ReadTree(Luts.Vp9SegmentTree, segTreeProbs.AsSpan());
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}
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private static ReadOnlySpan<byte> GetTxProbs(ref Vp9EntropyProbs fc, TxSize maxTxSize, int ctx)
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{
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switch (maxTxSize)
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{
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case TxSize.Tx8x8: return fc.Tx8x8Prob[ctx].AsSpan();
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case TxSize.Tx16x16: return fc.Tx16x16Prob[ctx].AsSpan();
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case TxSize.Tx32x32: return fc.Tx32x32Prob[ctx].AsSpan();
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default: Debug.Assert(false, "Invalid maxTxSize."); return ReadOnlySpan<byte>.Empty;
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}
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}
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private static Span<uint> GetTxCounts(ref Vp9BackwardUpdates counts, TxSize maxTxSize, int ctx)
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{
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switch (maxTxSize)
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{
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case TxSize.Tx8x8: return counts.Tx8x8[ctx].AsSpan();
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case TxSize.Tx16x16: return counts.Tx16x16[ctx].AsSpan();
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case TxSize.Tx32x32: return counts.Tx32x32[ctx].AsSpan();
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default: Debug.Assert(false, "Invalid maxTxSize."); return Span<uint>.Empty;
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}
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}
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private static TxSize ReadSelectedTxSize(ref Vp9Common cm, ref MacroBlockD xd, TxSize maxTxSize, ref Reader r)
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{
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int ctx = xd.GetTxSizeContext();
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ReadOnlySpan<byte> txProbs = GetTxProbs(ref cm.Fc.Value, maxTxSize, ctx);
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TxSize txSize = (TxSize)r.Read(txProbs[0]);
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if (txSize != TxSize.Tx4x4 && maxTxSize >= TxSize.Tx16x16)
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{
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txSize += r.Read(txProbs[1]);
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if (txSize != TxSize.Tx8x8 && maxTxSize >= TxSize.Tx32x32)
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{
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txSize += r.Read(txProbs[2]);
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}
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}
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if (!xd.Counts.IsNull)
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{
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++GetTxCounts(ref xd.Counts.Value, maxTxSize, ctx)[(int)txSize];
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}
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return txSize;
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}
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private static TxSize ReadTxSize(ref Vp9Common cm, ref MacroBlockD xd, bool allowSelect, ref Reader r)
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{
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TxMode txMode = cm.TxMode;
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BlockSize bsize = xd.Mi[0].Value.SbType;
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TxSize maxTxSize = Luts.MaxTxSizeLookup[(int)bsize];
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if (allowSelect && txMode == TxMode.TxModeSelect && bsize >= BlockSize.Block8x8)
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{
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return ReadSelectedTxSize(ref cm, ref xd, maxTxSize, ref r);
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}
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else
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{
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return (TxSize)Math.Min((int)maxTxSize, (int)Luts.TxModeToBiggestTxSize[(int)txMode]);
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}
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}
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private static int DecGetSegmentId(ref Vp9Common cm, ArrayPtr<byte> segmentIds, int miOffset, int xMis, int yMis)
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{
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int x, y, segmentId = int.MaxValue;
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for (y = 0; y < yMis; y++)
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{
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for (x = 0; x < xMis; x++)
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{
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segmentId = Math.Min(segmentId, segmentIds[miOffset + y * cm.MiCols + x]);
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}
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}
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Debug.Assert(segmentId >= 0 && segmentId < Constants.MaxSegments);
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return segmentId;
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}
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private static void SetSegmentId(ref Vp9Common cm, int miOffset, int xMis, int yMis, int segmentId)
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{
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int x, y;
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Debug.Assert(segmentId >= 0 && segmentId < Constants.MaxSegments);
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for (y = 0; y < yMis; y++)
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{
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for (x = 0; x < xMis; x++)
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{
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cm.CurrentFrameSegMap[miOffset + y * cm.MiCols + x] = (byte)segmentId;
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}
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}
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}
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private static void CopySegmentId(
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ref Vp9Common cm,
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ArrayPtr<byte> lastSegmentIds,
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ArrayPtr<byte> currentSegmentIds,
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int miOffset,
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int xMis,
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int yMis)
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{
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int x, y;
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for (y = 0; y < yMis; y++)
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{
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for (x = 0; x < xMis; x++)
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{
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currentSegmentIds[miOffset + y * cm.MiCols + x] = (byte)(!lastSegmentIds.IsNull ? lastSegmentIds[miOffset + y * cm.MiCols + x] : 0);
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}
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}
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}
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private static int ReadIntraSegmentId(ref Vp9Common cm, int miOffset, int xMis, int yMis, ref Reader r)
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{
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ref Segmentation seg = ref cm.Seg;
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int segmentId;
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if (!seg.Enabled)
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{
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return 0; // Default for disabled segmentation
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}
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if (!seg.UpdateMap)
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{
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CopySegmentId(ref cm, cm.LastFrameSegMap, cm.CurrentFrameSegMap, miOffset, xMis, yMis);
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return 0;
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}
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segmentId = ReadSegmentId(ref r, ref cm.Fc.Value.SegTreeProb);
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SetSegmentId(ref cm, miOffset, xMis, yMis, segmentId);
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return segmentId;
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}
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private static int ReadInterSegmentId(
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ref Vp9Common cm,
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ref MacroBlockD xd,
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int miRow,
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int miCol,
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ref Reader r,
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int xMis,
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int yMis)
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{
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ref Segmentation seg = ref cm.Seg;
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ref ModeInfo mi = ref xd.Mi[0].Value;
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int predictedSegmentId, segmentId;
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int miOffset = miRow * cm.MiCols + miCol;
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if (!seg.Enabled)
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{
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return 0; // Default for disabled segmentation
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}
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predictedSegmentId = !cm.LastFrameSegMap.IsNull
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? DecGetSegmentId(ref cm, cm.LastFrameSegMap, miOffset, xMis, yMis)
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: 0;
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if (!seg.UpdateMap)
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{
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CopySegmentId(ref cm, cm.LastFrameSegMap, cm.CurrentFrameSegMap, miOffset, xMis, yMis);
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return predictedSegmentId;
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}
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if (seg.TemporalUpdate)
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{
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byte predProb = Segmentation.GetPredProbSegId(ref cm.Fc.Value.SegPredProb, ref xd);
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mi.SegIdPredicted = (sbyte)r.Read(predProb);
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segmentId = mi.SegIdPredicted != 0 ? predictedSegmentId : ReadSegmentId(ref r, ref cm.Fc.Value.SegTreeProb);
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}
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else
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{
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segmentId = ReadSegmentId(ref r, ref cm.Fc.Value.SegTreeProb);
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}
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SetSegmentId(ref cm, miOffset, xMis, yMis, segmentId);
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return segmentId;
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}
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private static int ReadSkip(ref Vp9Common cm, ref MacroBlockD xd, int segmentId, ref Reader r)
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{
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if (cm.Seg.IsSegFeatureActive(segmentId, SegLvlFeatures.SegLvlSkip) != 0)
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{
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return 1;
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}
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else
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{
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int ctx = xd.GetSkipContext();
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int skip = r.Read(cm.Fc.Value.SkipProb[ctx]);
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if (!xd.Counts.IsNull)
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{
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++xd.Counts.Value.Skip[ctx][skip];
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}
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return skip;
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}
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}
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private static int ReadMvComponent(ref Reader r, ref Vp9EntropyProbs fc, int mvcomp, bool usehp)
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{
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int mag, d, fr, hp;
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bool sign = r.Read(fc.Sign[mvcomp]) != 0;
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MvClassType mvClass = (MvClassType)r.ReadTree(Luts.Vp9MvClassTree, fc.Classes[mvcomp].AsSpan());
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bool class0 = mvClass == MvClassType.MvClass0;
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// Integer part
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if (class0)
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{
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d = r.Read(fc.Class0[mvcomp][0]);
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mag = 0;
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}
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else
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{
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int i;
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int n = (int)mvClass + Constants.Class0Bits - 1; // Number of bits
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d = 0;
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for (i = 0; i < n; ++i)
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{
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d |= r.Read(fc.Bits[mvcomp][i]) << i;
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}
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mag = Constants.Class0Size << ((int)mvClass + 2);
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}
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// Fractional part
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fr = r.ReadTree(Luts.Vp9MvFPTree, class0 ? fc.Class0Fp[mvcomp][d].AsSpan() : fc.Fp[mvcomp].AsSpan());
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// High precision part (if hp is not used, the default value of the hp is 1)
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hp = usehp ? r.Read(class0 ? fc.Class0Hp[mvcomp] : fc.Hp[mvcomp]) : 1;
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// Result
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mag += ((d << 3) | (fr << 1) | hp) + 1;
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return sign ? -mag : mag;
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}
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private static void ReadMv(
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ref Reader r,
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ref Mv mv,
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ref Mv refr,
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ref Vp9EntropyProbs fc,
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Ptr<Vp9BackwardUpdates> counts,
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bool allowHP)
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{
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MvJointType jointType = (MvJointType)r.ReadTree(Luts.Vp9MvJointTree, fc.Joints.AsSpan());
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bool useHP = allowHP && refr.UseMvHp();
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Mv diff = new Mv();
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if (Mv.MvJointVertical(jointType))
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{
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diff.Row = (short)ReadMvComponent(ref r, ref fc, 0, useHP);
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}
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if (Mv.MvJointHorizontal(jointType))
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{
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diff.Col = (short)ReadMvComponent(ref r, ref fc, 1, useHP);
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}
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diff.IncMv(counts);
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mv.Row = (short)(refr.Row + diff.Row);
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mv.Col = (short)(refr.Col + diff.Col);
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}
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private static ReferenceMode ReadBlockReferenceMode(ref Vp9Common cm, ref MacroBlockD xd, ref Reader r)
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{
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if (cm.ReferenceMode == ReferenceMode.ReferenceModeSelect)
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{
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int ctx = PredCommon.GetReferenceModeContext(ref cm, ref xd);
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ReferenceMode mode = (ReferenceMode)r.Read(cm.Fc.Value.CompInterProb[ctx]);
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if (!xd.Counts.IsNull)
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{
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++xd.Counts.Value.CompInter[ctx][(int)mode];
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}
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return mode; // SingleReference or CompoundReference
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}
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else
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{
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return cm.ReferenceMode;
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}
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}
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// Read the referncence frame
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private static void ReadRefFrames(
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ref Vp9Common cm,
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ref MacroBlockD xd,
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ref Reader r,
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int segmentId,
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ref Array2<sbyte> refFrame)
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{
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ref Vp9EntropyProbs fc = ref cm.Fc.Value;
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if (cm.Seg.IsSegFeatureActive(segmentId, SegLvlFeatures.SegLvlRefFrame) != 0)
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{
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refFrame[0] = (sbyte)cm.Seg.GetSegData(segmentId, SegLvlFeatures.SegLvlRefFrame);
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refFrame[1] = Constants.None;
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}
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else
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{
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ReferenceMode mode = ReadBlockReferenceMode(ref cm, ref xd, ref r);
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if (mode == ReferenceMode.CompoundReference)
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{
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int idx = cm.RefFrameSignBias[cm.CompFixedRef];
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int ctx = PredCommon.GetPredContextCompRefP(ref cm, ref xd);
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int bit = r.Read(fc.CompRefProb[ctx]);
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if (!xd.Counts.IsNull)
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{
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++xd.Counts.Value.CompRef[ctx][bit];
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}
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refFrame[idx] = cm.CompFixedRef;
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refFrame[idx == 0 ? 1 : 0] = cm.CompVarRef[bit];
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}
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else if (mode == ReferenceMode.SingleReference)
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{
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int ctx0 = PredCommon.GetPredContextSingleRefP1(ref xd);
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int bit0 = r.Read(fc.SingleRefProb[ctx0][0]);
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if (!xd.Counts.IsNull)
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{
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++xd.Counts.Value.SingleRef[ctx0][0][bit0];
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}
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if (bit0 != 0)
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{
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int ctx1 = PredCommon.GetPredContextSingleRefP2(ref xd);
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int bit1 = r.Read(fc.SingleRefProb[ctx1][1]);
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if (!xd.Counts.IsNull)
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{
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++xd.Counts.Value.SingleRef[ctx1][1][bit1];
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}
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refFrame[0] = (sbyte)(bit1 != 0 ? Constants.AltRefFrame : Constants.GoldenFrame);
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}
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else
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{
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refFrame[0] = Constants.LastFrame;
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}
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refFrame[1] = Constants.None;
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}
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else
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{
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Debug.Assert(false, "Invalid prediction mode.");
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}
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}
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}
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private static byte ReadSwitchableInterpFilter(ref Vp9Common cm, ref MacroBlockD xd, ref Reader r)
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{
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int ctx = xd.GetPredContextSwitchableInterp();
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byte type = (byte)r.ReadTree(Luts.Vp9SwitchableInterpTree, cm.Fc.Value.SwitchableInterpProb[ctx].AsSpan());
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if (!xd.Counts.IsNull)
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{
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++xd.Counts.Value.SwitchableInterp[ctx][type];
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}
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return type;
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}
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private static void ReadIntraBlockModeInfo(ref Vp9Common cm, ref MacroBlockD xd, ref ModeInfo mi, ref Reader r)
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{
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BlockSize bsize = mi.SbType;
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int i;
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switch (bsize)
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{
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case BlockSize.Block4x4:
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for (i = 0; i < 4; ++i)
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{
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mi.Bmi[i].Mode = ReadIntraModeY(ref cm, ref xd, ref r, 0);
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}
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mi.Mode = mi.Bmi[3].Mode;
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break;
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case BlockSize.Block4x8:
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mi.Bmi[0].Mode = mi.Bmi[2].Mode = ReadIntraModeY(ref cm, ref xd, ref r, 0);
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mi.Bmi[1].Mode = mi.Bmi[3].Mode = mi.Mode = ReadIntraModeY(ref cm, ref xd, ref r, 0);
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break;
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case BlockSize.Block8x4:
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mi.Bmi[0].Mode = mi.Bmi[1].Mode = ReadIntraModeY(ref cm, ref xd, ref r, 0);
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mi.Bmi[2].Mode = mi.Bmi[3].Mode = mi.Mode = ReadIntraModeY(ref cm, ref xd, ref r, 0);
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break;
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default: mi.Mode = ReadIntraModeY(ref cm, ref xd, ref r, Luts.SizeGroupLookup[(int)bsize]); break;
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}
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mi.UvMode = ReadIntraModeUv(ref cm, ref xd, ref r, (byte)mi.Mode);
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// Initialize interp_filter here so we do not have to check for inter block
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// modes in GetPredContextSwitchableInterp()
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mi.InterpFilter = Constants.SwitchableFilters;
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mi.RefFrame[0] = Constants.IntraFrame;
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mi.RefFrame[1] = Constants.None;
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}
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private static bool IsMvValid(ref Mv mv)
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{
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return mv.Row > Constants.MvLow &&
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mv.Row < Constants.MvUpp &&
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mv.Col > Constants.MvLow &&
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mv.Col < Constants.MvUpp;
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}
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private static void CopyMvPair(ref Array2<Mv> dst, ref Array2<Mv> src)
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{
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dst[0] = src[0];
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dst[1] = src[1];
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}
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private static void ZeroMvPair(ref Array2<Mv> dst)
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{
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dst[0] = new Mv();
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dst[1] = new Mv();
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}
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private static bool AssignMv(
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ref Vp9Common cm,
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ref MacroBlockD xd,
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PredictionMode mode,
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ref Array2<Mv> mv,
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ref Array2<Mv> refMv,
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ref Array2<Mv> nearNearestMv,
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int isCompound,
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bool allowHP,
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ref Reader r)
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{
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int i;
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bool ret = true;
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switch (mode)
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{
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case PredictionMode.NewMv:
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{
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for (i = 0; i < 1 + isCompound; ++i)
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{
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ReadMv(ref r, ref mv[i], ref refMv[i], ref cm.Fc.Value, xd.Counts, allowHP);
|
|
ret = ret && IsMvValid(ref mv[i]);
|
|
}
|
|
break;
|
|
}
|
|
case PredictionMode.NearMv:
|
|
case PredictionMode.NearestMv:
|
|
{
|
|
CopyMvPair(ref mv, ref nearNearestMv);
|
|
break;
|
|
}
|
|
case PredictionMode.ZeroMv:
|
|
{
|
|
ZeroMvPair(ref mv);
|
|
break;
|
|
}
|
|
default: return false;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
private static bool ReadIsInterBlock(ref Vp9Common cm, ref MacroBlockD xd, int segmentId, ref Reader r)
|
|
{
|
|
if (cm.Seg.IsSegFeatureActive(segmentId, SegLvlFeatures.SegLvlRefFrame) != 0)
|
|
{
|
|
return cm.Seg.GetSegData(segmentId, SegLvlFeatures.SegLvlRefFrame) != Constants.IntraFrame;
|
|
}
|
|
else
|
|
{
|
|
int ctx = xd.GetIntraInterContext();
|
|
bool isInter = r.Read(cm.Fc.Value.IntraInterProb[ctx]) != 0;
|
|
if (!xd.Counts.IsNull)
|
|
{
|
|
++xd.Counts.Value.IntraInter[ctx][isInter ? 1 : 0];
|
|
}
|
|
|
|
return isInter;
|
|
}
|
|
}
|
|
|
|
private static void DecFindBestRefMvs(bool allowHP, Span<Mv> mvlist, ref Mv bestMv, int refmvCount)
|
|
{
|
|
int i;
|
|
|
|
// Make sure all the candidates are properly clamped etc
|
|
for (i = 0; i < refmvCount; ++i)
|
|
{
|
|
mvlist[i].LowerMvPrecision(allowHP);
|
|
bestMv = mvlist[i];
|
|
}
|
|
}
|
|
|
|
private static bool AddMvRefListEb(Mv mv, ref int refMvCount, Span<Mv> mvRefList, bool earlyBreak)
|
|
{
|
|
if (refMvCount != 0)
|
|
{
|
|
if (Unsafe.As<Mv, int>(ref mv) != Unsafe.As<Mv, int>(ref mvRefList[0]))
|
|
{
|
|
mvRefList[refMvCount] = mv;
|
|
refMvCount++;
|
|
return true;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
mvRefList[refMvCount++] = mv;
|
|
if (earlyBreak)
|
|
{
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
// Performs mv sign inversion if indicated by the reference frame combination.
|
|
private static Mv ScaleMv(ref ModeInfo mi, int refr, sbyte thisRefFrame, ref Array4<sbyte> refSignBias)
|
|
{
|
|
Mv mv = mi.Mv[refr];
|
|
if (refSignBias[mi.RefFrame[refr]] != refSignBias[thisRefFrame])
|
|
{
|
|
mv.Row *= -1;
|
|
mv.Col *= -1;
|
|
}
|
|
return mv;
|
|
}
|
|
|
|
private static bool IsDiffRefFrameAddMvEb(
|
|
ref ModeInfo mbmi,
|
|
sbyte refFrame,
|
|
ref Array4<sbyte> refSignBias,
|
|
ref int refmvCount,
|
|
Span<Mv> mvRefList,
|
|
bool earlyBreak)
|
|
{
|
|
if (mbmi.IsInterBlock())
|
|
{
|
|
if (mbmi.RefFrame[0] != refFrame)
|
|
{
|
|
if (AddMvRefListEb(ScaleMv(ref mbmi, 0, refFrame, ref refSignBias), ref refmvCount, mvRefList, earlyBreak))
|
|
{
|
|
return true;
|
|
}
|
|
}
|
|
if (mbmi.HasSecondRef() && mbmi.RefFrame[1] != refFrame && Unsafe.As<Mv, int>(ref mbmi.Mv[1]) != Unsafe.As<Mv, int>(ref mbmi.Mv[0]))
|
|
{
|
|
if (AddMvRefListEb(ScaleMv(ref mbmi, 1, refFrame, ref refSignBias), ref refmvCount, mvRefList, earlyBreak))
|
|
{
|
|
return true;
|
|
}
|
|
}
|
|
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// This function searches the neighborhood of a given MB/SB
|
|
// to try and find candidate reference vectors.
|
|
private static unsafe int DecFindMvRefs(
|
|
ref Vp9Common cm,
|
|
ref MacroBlockD xd,
|
|
PredictionMode mode,
|
|
sbyte refFrame,
|
|
Span<Position> mvRefSearch,
|
|
Span<Mv> mvRefList,
|
|
int miRow,
|
|
int miCol,
|
|
int block,
|
|
int isSub8X8)
|
|
{
|
|
ref Array4<sbyte> refSignBias = ref cm.RefFrameSignBias;
|
|
int i, refmvCount = 0;
|
|
bool differentRefFound = false;
|
|
Ptr<MvRef> prevFrameMvs = cm.UsePrevFrameMvs ? new Ptr<MvRef>(ref cm.PrevFrameMvs[miRow * cm.MiCols + miCol]) : Ptr<MvRef>.Null;
|
|
ref TileInfo tile = ref xd.Tile;
|
|
// If mode is nearestmv or newmv (uses nearestmv as a reference) then stop
|
|
// searching after the first mv is found.
|
|
bool earlyBreak = mode != PredictionMode.NearMv;
|
|
|
|
// Blank the reference vector list
|
|
mvRefList.Slice(0, Constants.MaxMvRefCandidates).Fill(new Mv());
|
|
|
|
i = 0;
|
|
if (isSub8X8 != 0)
|
|
{
|
|
// If the size < 8x8 we get the mv from the bmi substructure for the
|
|
// nearest two blocks.
|
|
for (i = 0; i < 2; ++i)
|
|
{
|
|
ref Position mvRef = ref mvRefSearch[i];
|
|
if (tile.IsInside(miCol, miRow, cm.MiRows, ref mvRef))
|
|
{
|
|
ref ModeInfo candidateMi = ref xd.Mi[mvRef.Col + mvRef.Row * xd.MiStride].Value;
|
|
differentRefFound = true;
|
|
|
|
if (candidateMi.RefFrame[0] == refFrame)
|
|
{
|
|
if (AddMvRefListEb(candidateMi.GetSubBlockMv(0, mvRef.Col, block), ref refmvCount, mvRefList, earlyBreak))
|
|
{
|
|
goto Done;
|
|
}
|
|
}
|
|
else if (candidateMi.RefFrame[1] == refFrame)
|
|
{
|
|
if (AddMvRefListEb(candidateMi.GetSubBlockMv(1, mvRef.Col, block), ref refmvCount, mvRefList, earlyBreak))
|
|
{
|
|
goto Done;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Check the rest of the neighbors in much the same way
|
|
// as before except we don't need to keep track of sub blocks or
|
|
// mode counts.
|
|
for (; i < MvrefNeighbours; ++i)
|
|
{
|
|
ref Position mvRef = ref mvRefSearch[i];
|
|
if (tile.IsInside(miCol, miRow, cm.MiRows, ref mvRef))
|
|
{
|
|
ref ModeInfo candidate = ref xd.Mi[mvRef.Col + mvRef.Row * xd.MiStride].Value;
|
|
differentRefFound = true;
|
|
|
|
if (candidate.RefFrame[0] == refFrame)
|
|
{
|
|
if (AddMvRefListEb(candidate.Mv[0], ref refmvCount, mvRefList, earlyBreak))
|
|
{
|
|
goto Done;
|
|
}
|
|
}
|
|
else if (candidate.RefFrame[1] == refFrame)
|
|
{
|
|
if (AddMvRefListEb(candidate.Mv[1], ref refmvCount, mvRefList, earlyBreak))
|
|
{
|
|
goto Done;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Check the last frame's mode and mv info.
|
|
if (!prevFrameMvs.IsNull)
|
|
{
|
|
if (prevFrameMvs.Value.RefFrame[0] == refFrame)
|
|
{
|
|
if (AddMvRefListEb(prevFrameMvs.Value.Mv[0], ref refmvCount, mvRefList, earlyBreak))
|
|
{
|
|
goto Done;
|
|
}
|
|
}
|
|
else if (prevFrameMvs.Value.RefFrame[1] == refFrame)
|
|
{
|
|
if (AddMvRefListEb(prevFrameMvs.Value.Mv[1], ref refmvCount, mvRefList, earlyBreak))
|
|
{
|
|
goto Done;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Since we couldn't find 2 mvs from the same reference frame
|
|
// go back through the neighbors and find motion vectors from
|
|
// different reference frames.
|
|
if (differentRefFound)
|
|
{
|
|
for (i = 0; i < MvrefNeighbours; ++i)
|
|
{
|
|
ref Position mvRef = ref mvRefSearch[i];
|
|
if (tile.IsInside(miCol, miRow, cm.MiRows, ref mvRef))
|
|
{
|
|
ref ModeInfo candidate = ref xd.Mi[mvRef.Col + mvRef.Row * xd.MiStride].Value;
|
|
|
|
// If the candidate is Intra we don't want to consider its mv.
|
|
if (IsDiffRefFrameAddMvEb(ref candidate, refFrame, ref refSignBias, ref refmvCount, mvRefList, earlyBreak))
|
|
{
|
|
goto Done;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Since we still don't have a candidate we'll try the last frame.
|
|
if (!prevFrameMvs.IsNull)
|
|
{
|
|
if (prevFrameMvs.Value.RefFrame[0] != refFrame && prevFrameMvs.Value.RefFrame[0] > Constants.IntraFrame)
|
|
{
|
|
Mv mv = prevFrameMvs.Value.Mv[0];
|
|
if (refSignBias[prevFrameMvs.Value.RefFrame[0]] != refSignBias[refFrame])
|
|
{
|
|
mv.Row *= -1;
|
|
mv.Col *= -1;
|
|
}
|
|
if (AddMvRefListEb(mv, ref refmvCount, mvRefList, earlyBreak))
|
|
{
|
|
goto Done;
|
|
}
|
|
}
|
|
|
|
if (prevFrameMvs.Value.RefFrame[1] > Constants.IntraFrame &&
|
|
prevFrameMvs.Value.RefFrame[1] != refFrame &&
|
|
Unsafe.As<Mv, int>(ref prevFrameMvs.Value.Mv[1]) != Unsafe.As<Mv, int>(ref prevFrameMvs.Value.Mv[0]))
|
|
{
|
|
Mv mv = prevFrameMvs.Value.Mv[1];
|
|
if (refSignBias[prevFrameMvs.Value.RefFrame[1]] != refSignBias[refFrame])
|
|
{
|
|
mv.Row *= -1;
|
|
mv.Col *= -1;
|
|
}
|
|
if (AddMvRefListEb(mv, ref refmvCount, mvRefList, earlyBreak))
|
|
{
|
|
goto Done;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (mode == PredictionMode.NearMv)
|
|
{
|
|
refmvCount = Constants.MaxMvRefCandidates;
|
|
}
|
|
else
|
|
{
|
|
// We only care about the nearestmv for the remaining modes
|
|
refmvCount = 1;
|
|
}
|
|
|
|
Done:
|
|
// Clamp vectors
|
|
for (i = 0; i < refmvCount; ++i)
|
|
{
|
|
mvRefList[i].ClampMvRef(ref xd);
|
|
}
|
|
|
|
return refmvCount;
|
|
}
|
|
|
|
private static void AppendSub8x8MvsForIdx(
|
|
ref Vp9Common cm,
|
|
ref MacroBlockD xd,
|
|
Span<Position> mvRefSearch,
|
|
PredictionMode bMode,
|
|
int block,
|
|
int refr,
|
|
int miRow,
|
|
int miCol,
|
|
ref Mv bestSub8x8)
|
|
{
|
|
Span<Mv> mvList = stackalloc Mv[Constants.MaxMvRefCandidates];
|
|
ref ModeInfo mi = ref xd.Mi[0].Value;
|
|
ref Array4<BModeInfo> bmi = ref mi.Bmi;
|
|
int n;
|
|
int refmvCount;
|
|
|
|
Debug.Assert(Constants.MaxMvRefCandidates == 2);
|
|
|
|
refmvCount = DecFindMvRefs(ref cm, ref xd, bMode, mi.RefFrame[refr], mvRefSearch, mvList, miRow, miCol, block, 1);
|
|
|
|
switch (block)
|
|
{
|
|
case 0: bestSub8x8 = mvList[refmvCount - 1]; break;
|
|
case 1:
|
|
case 2:
|
|
if (bMode == PredictionMode.NearestMv)
|
|
{
|
|
bestSub8x8 = bmi[0].Mv[refr];
|
|
}
|
|
else
|
|
{
|
|
bestSub8x8 = new Mv();
|
|
for (n = 0; n < refmvCount; ++n)
|
|
{
|
|
if (Unsafe.As<Mv, int>(ref bmi[0].Mv[refr]) != Unsafe.As<Mv, int>(ref mvList[n]))
|
|
{
|
|
bestSub8x8 = mvList[n];
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case 3:
|
|
if (bMode == PredictionMode.NearestMv)
|
|
{
|
|
bestSub8x8 = bmi[2].Mv[refr];
|
|
}
|
|
else
|
|
{
|
|
Span<Mv> candidates = stackalloc Mv[2 + Constants.MaxMvRefCandidates];
|
|
candidates[0] = bmi[1].Mv[refr];
|
|
candidates[1] = bmi[0].Mv[refr];
|
|
candidates[2] = mvList[0];
|
|
candidates[3] = mvList[1];
|
|
bestSub8x8 = new Mv();
|
|
for (n = 0; n < 2 + Constants.MaxMvRefCandidates; ++n)
|
|
{
|
|
if (Unsafe.As<Mv, int>(ref bmi[2].Mv[refr]) != Unsafe.As<Mv, int>(ref candidates[n]))
|
|
{
|
|
bestSub8x8 = candidates[n];
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
default: Debug.Assert(false, "Invalid block index."); break;
|
|
}
|
|
}
|
|
|
|
private static byte GetModeContext(ref Vp9Common cm, ref MacroBlockD xd, Span<Position> mvRefSearch, int miRow, int miCol)
|
|
{
|
|
int i;
|
|
int contextCounter = 0;
|
|
ref TileInfo tile = ref xd.Tile;
|
|
|
|
// Get mode count from nearest 2 blocks
|
|
for (i = 0; i < 2; ++i)
|
|
{
|
|
ref Position mvRef = ref mvRefSearch[i];
|
|
if (tile.IsInside(miCol, miRow, cm.MiRows, ref mvRef))
|
|
{
|
|
ref ModeInfo candidate = ref xd.Mi[mvRef.Col + mvRef.Row * xd.MiStride].Value;
|
|
// Keep counts for entropy encoding.
|
|
contextCounter += Luts.Mode2Counter[(int)candidate.Mode];
|
|
}
|
|
}
|
|
|
|
return (byte)Luts.CounterToContext[contextCounter];
|
|
}
|
|
|
|
private static void ReadInterBlockModeInfo(
|
|
ref Vp9Common cm,
|
|
ref MacroBlockD xd,
|
|
ref ModeInfo mi,
|
|
int miRow,
|
|
int miCol,
|
|
ref Reader r)
|
|
{
|
|
BlockSize bsize = mi.SbType;
|
|
bool allowHP = cm.AllowHighPrecisionMv;
|
|
Array2<Mv> bestRefMvs = new Array2<Mv>();
|
|
int refr, isCompound;
|
|
byte interModeCtx;
|
|
Span<Position> mvRefSearch = Luts.MvRefBlocks[(int)bsize];
|
|
|
|
ReadRefFrames(ref cm, ref xd, ref r, mi.SegmentId, ref mi.RefFrame);
|
|
isCompound = mi.HasSecondRef() ? 1 : 0;
|
|
interModeCtx = GetModeContext(ref cm, ref xd, mvRefSearch, miRow, miCol);
|
|
|
|
if (cm.Seg.IsSegFeatureActive(mi.SegmentId, SegLvlFeatures.SegLvlSkip) != 0)
|
|
{
|
|
mi.Mode = PredictionMode.ZeroMv;
|
|
if (bsize < BlockSize.Block8x8)
|
|
{
|
|
xd.ErrorInfo.Value.InternalError(CodecErr.CodecUnsupBitstream, "Invalid usage of segement feature on small blocks");
|
|
return;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (bsize >= BlockSize.Block8x8)
|
|
{
|
|
mi.Mode = ReadInterMode(ref cm, ref xd, ref r, interModeCtx);
|
|
}
|
|
else
|
|
{
|
|
// Sub 8x8 blocks use the nearestmv as a ref_mv if the bMode is NewMv.
|
|
// Setting mode to NearestMv forces the search to stop after the nearestmv
|
|
// has been found. After bModes have been read, mode will be overwritten
|
|
// by the last bMode.
|
|
mi.Mode = PredictionMode.NearestMv;
|
|
}
|
|
|
|
if (mi.Mode != PredictionMode.ZeroMv)
|
|
{
|
|
Span<Mv> tmpMvs = stackalloc Mv[Constants.MaxMvRefCandidates];
|
|
|
|
for (refr = 0; refr < 1 + isCompound; ++refr)
|
|
{
|
|
sbyte frame = mi.RefFrame[refr];
|
|
int refmvCount;
|
|
|
|
refmvCount = DecFindMvRefs(ref cm, ref xd, mi.Mode, frame, mvRefSearch, tmpMvs, miRow, miCol, -1, 0);
|
|
|
|
DecFindBestRefMvs(allowHP, tmpMvs, ref bestRefMvs[refr], refmvCount);
|
|
}
|
|
}
|
|
}
|
|
|
|
mi.InterpFilter = (cm.InterpFilter == Constants.Switchable) ? ReadSwitchableInterpFilter(ref cm, ref xd, ref r) : cm.InterpFilter;
|
|
|
|
if (bsize < BlockSize.Block8x8)
|
|
{
|
|
int num4X4W = 1 << xd.BmodeBlocksWl;
|
|
int num4X4H = 1 << xd.BmodeBlocksHl;
|
|
int idx, idy;
|
|
PredictionMode bMode = 0;
|
|
Array2<Mv> bestSub8x8 = new Array2<Mv>();
|
|
const uint invalidMv = 0x80008000;
|
|
// Initialize the 2nd element as even though it won't be used meaningfully
|
|
// if isCompound is false.
|
|
Unsafe.As<Mv, uint>(ref bestSub8x8[1]) = invalidMv;
|
|
for (idy = 0; idy < 2; idy += num4X4H)
|
|
{
|
|
for (idx = 0; idx < 2; idx += num4X4W)
|
|
{
|
|
int j = idy * 2 + idx;
|
|
bMode = ReadInterMode(ref cm, ref xd, ref r, interModeCtx);
|
|
|
|
if (bMode == PredictionMode.NearestMv || bMode == PredictionMode.NearMv)
|
|
{
|
|
for (refr = 0; refr < 1 + isCompound; ++refr)
|
|
{
|
|
AppendSub8x8MvsForIdx(ref cm, ref xd, mvRefSearch, bMode, j, refr, miRow, miCol, ref bestSub8x8[refr]);
|
|
}
|
|
}
|
|
|
|
if (!AssignMv(ref cm, ref xd, bMode, ref mi.Bmi[j].Mv, ref bestRefMvs, ref bestSub8x8, isCompound, allowHP, ref r))
|
|
{
|
|
xd.Corrupted |= true;
|
|
break;
|
|
}
|
|
|
|
if (num4X4H == 2)
|
|
{
|
|
mi.Bmi[j + 2] = mi.Bmi[j];
|
|
}
|
|
|
|
if (num4X4W == 2)
|
|
{
|
|
mi.Bmi[j + 1] = mi.Bmi[j];
|
|
}
|
|
}
|
|
}
|
|
|
|
mi.Mode = bMode;
|
|
|
|
CopyMvPair(ref mi.Mv, ref mi.Bmi[3].Mv);
|
|
}
|
|
else
|
|
{
|
|
xd.Corrupted |= !AssignMv(ref cm, ref xd, mi.Mode, ref mi.Mv, ref bestRefMvs, ref bestRefMvs, isCompound, allowHP, ref r);
|
|
}
|
|
}
|
|
|
|
private static void ReadInterFrameModeInfo(
|
|
ref Vp9Common cm,
|
|
ref MacroBlockD xd,
|
|
int miRow,
|
|
int miCol,
|
|
ref Reader r,
|
|
int xMis,
|
|
int yMis)
|
|
{
|
|
ref ModeInfo mi = ref xd.Mi[0].Value;
|
|
bool interBlock;
|
|
|
|
mi.SegmentId = (sbyte)ReadInterSegmentId(ref cm, ref xd, miRow, miCol, ref r, xMis, yMis);
|
|
mi.Skip = (sbyte)ReadSkip(ref cm, ref xd, mi.SegmentId, ref r);
|
|
interBlock = ReadIsInterBlock(ref cm, ref xd, mi.SegmentId, ref r);
|
|
mi.TxSize = ReadTxSize(ref cm, ref xd, mi.Skip == 0 || !interBlock, ref r);
|
|
|
|
if (interBlock)
|
|
{
|
|
ReadInterBlockModeInfo(ref cm, ref xd, ref mi, miRow, miCol, ref r);
|
|
}
|
|
else
|
|
{
|
|
ReadIntraBlockModeInfo(ref cm, ref xd, ref mi, ref r);
|
|
}
|
|
}
|
|
|
|
private static PredictionMode LeftBlockMode(Ptr<ModeInfo> curMi, Ptr<ModeInfo> leftMi, int b)
|
|
{
|
|
if (b == 0 || b == 2)
|
|
{
|
|
if (leftMi.IsNull || leftMi.Value.IsInterBlock())
|
|
{
|
|
return PredictionMode.DcPred;
|
|
}
|
|
|
|
return leftMi.Value.GetYMode(b + 1);
|
|
}
|
|
else
|
|
{
|
|
Debug.Assert(b == 1 || b == 3);
|
|
return curMi.Value.Bmi[b - 1].Mode;
|
|
}
|
|
}
|
|
|
|
private static PredictionMode AboveBlockMode(Ptr<ModeInfo> curMi, Ptr<ModeInfo> aboveMi, int b)
|
|
{
|
|
if (b == 0 || b == 1)
|
|
{
|
|
if (aboveMi.IsNull || aboveMi.Value.IsInterBlock())
|
|
{
|
|
return PredictionMode.DcPred;
|
|
}
|
|
|
|
return aboveMi.Value.GetYMode(b + 2);
|
|
}
|
|
else
|
|
{
|
|
Debug.Assert(b == 2 || b == 3);
|
|
return curMi.Value.Bmi[b - 2].Mode;
|
|
}
|
|
}
|
|
|
|
private static ReadOnlySpan<byte> GetYModeProbs(
|
|
ref Vp9EntropyProbs fc,
|
|
Ptr<ModeInfo> mi,
|
|
Ptr<ModeInfo> aboveMi,
|
|
Ptr<ModeInfo> leftMi,
|
|
int block)
|
|
{
|
|
PredictionMode above = AboveBlockMode(mi, aboveMi, block);
|
|
PredictionMode left = LeftBlockMode(mi, leftMi, block);
|
|
return fc.KfYModeProb[(int)above][(int)left].AsSpan();
|
|
}
|
|
|
|
private static void ReadIntraFrameModeInfo(
|
|
ref Vp9Common cm,
|
|
ref MacroBlockD xd,
|
|
int miRow,
|
|
int miCol,
|
|
ref Reader r,
|
|
int xMis,
|
|
int yMis)
|
|
{
|
|
Ptr<ModeInfo> mi = xd.Mi[0];
|
|
Ptr<ModeInfo> aboveMi = xd.AboveMi;
|
|
Ptr<ModeInfo> leftMi = xd.LeftMi;
|
|
BlockSize bsize = mi.Value.SbType;
|
|
int i;
|
|
int miOffset = miRow * cm.MiCols + miCol;
|
|
|
|
mi.Value.SegmentId = (sbyte)ReadIntraSegmentId(ref cm, miOffset, xMis, yMis, ref r);
|
|
mi.Value.Skip = (sbyte)ReadSkip(ref cm, ref xd, mi.Value.SegmentId, ref r);
|
|
mi.Value.TxSize = ReadTxSize(ref cm, ref xd, true, ref r);
|
|
mi.Value.RefFrame[0] = Constants.IntraFrame;
|
|
mi.Value.RefFrame[1] = Constants.None;
|
|
|
|
switch (bsize)
|
|
{
|
|
case BlockSize.Block4x4:
|
|
for (i = 0; i < 4; ++i)
|
|
{
|
|
mi.Value.Bmi[i].Mode =
|
|
ReadIntraMode(ref r, GetYModeProbs(ref cm.Fc.Value, mi, aboveMi, leftMi, i));
|
|
}
|
|
|
|
mi.Value.Mode = mi.Value.Bmi[3].Mode;
|
|
break;
|
|
case BlockSize.Block4x8:
|
|
mi.Value.Bmi[0].Mode = mi.Value.Bmi[2].Mode =
|
|
ReadIntraMode(ref r, GetYModeProbs(ref cm.Fc.Value, mi, aboveMi, leftMi, 0));
|
|
mi.Value.Bmi[1].Mode = mi.Value.Bmi[3].Mode = mi.Value.Mode =
|
|
ReadIntraMode(ref r, GetYModeProbs(ref cm.Fc.Value, mi, aboveMi, leftMi, 1));
|
|
break;
|
|
case BlockSize.Block8x4:
|
|
mi.Value.Bmi[0].Mode = mi.Value.Bmi[1].Mode =
|
|
ReadIntraMode(ref r, GetYModeProbs(ref cm.Fc.Value, mi, aboveMi, leftMi, 0));
|
|
mi.Value.Bmi[2].Mode = mi.Value.Bmi[3].Mode = mi.Value.Mode =
|
|
ReadIntraMode(ref r, GetYModeProbs(ref cm.Fc.Value, mi, aboveMi, leftMi, 2));
|
|
break;
|
|
default:
|
|
mi.Value.Mode = ReadIntraMode(ref r, GetYModeProbs(ref cm.Fc.Value, mi, aboveMi, leftMi, 0));
|
|
break;
|
|
}
|
|
|
|
mi.Value.UvMode = ReadIntraMode(ref r, cm.Fc.Value.KfUvModeProb[(int)mi.Value.Mode].AsSpan());
|
|
}
|
|
|
|
private static void CopyRefFramePair(ref Array2<sbyte> dst, ref Array2<sbyte> src)
|
|
{
|
|
dst[0] = src[0];
|
|
dst[1] = src[1];
|
|
}
|
|
|
|
public static void ReadModeInfo(
|
|
ref TileWorkerData twd,
|
|
ref Vp9Common cm,
|
|
int miRow,
|
|
int miCol,
|
|
int xMis,
|
|
int yMis)
|
|
{
|
|
ref Reader r = ref twd.BitReader;
|
|
ref MacroBlockD xd = ref twd.Xd;
|
|
ref ModeInfo mi = ref xd.Mi[0].Value;
|
|
ArrayPtr<MvRef> frameMvs = cm.CurFrameMvs.Slice(miRow * cm.MiCols + miCol);
|
|
int w, h;
|
|
|
|
if (cm.FrameIsIntraOnly())
|
|
{
|
|
ReadIntraFrameModeInfo(ref cm, ref xd, miRow, miCol, ref r, xMis, yMis);
|
|
}
|
|
else
|
|
{
|
|
ReadInterFrameModeInfo(ref cm, ref xd, miRow, miCol, ref r, xMis, yMis);
|
|
|
|
for (h = 0; h < yMis; ++h)
|
|
{
|
|
for (w = 0; w < xMis; ++w)
|
|
{
|
|
ref MvRef mv = ref frameMvs[w];
|
|
CopyRefFramePair(ref mv.RefFrame, ref mi.RefFrame);
|
|
CopyMvPair(ref mv.Mv, ref mi.Mv);
|
|
}
|
|
frameMvs = frameMvs.Slice(cm.MiCols);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|