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Merge pull request #24138 from tybug/negative-frame-handling

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Handle replay frames with negative time delta appropriately
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Dan Balasescu 2024-05-29 13:46:24 +09:00 committed by GitHub
commit 98ad8f807a
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2 changed files with 134 additions and 20 deletions
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100
osu.Game.Tests/Beatmaps/Formats/LegacyScoreDecoderTest.cs
View File

@ -33,6 +33,7 @@ using osu.Game.Scoring;
using osu.Game.Scoring.Legacy;
using osu.Game.Tests.Resources;
using osu.Game.Users;
using osuTK;
namespace osu.Game.Tests.Beatmaps.Formats
{
@ -126,17 +127,20 @@ namespace osu.Game.Tests.Beatmaps.Formats
[TestCase(LegacyBeatmapDecoder.LATEST_VERSION, false)]
public void TestLegacyBeatmapReplayOffsetsDecode(int beatmapVersion, bool offsetApplied)
{
const double first_frame_time = 48;
const double second_frame_time = 65;
const double first_frame_time = 31;
const double second_frame_time = 48;
const double third_frame_time = 65;
var decoder = new TestLegacyScoreDecoder(beatmapVersion);
using (var resourceStream = TestResources.OpenResource("Replays/mania-replay.osr"))
{
var score = decoder.Parse(resourceStream);
int offset = offsetApplied ? LegacyBeatmapDecoder.EARLY_VERSION_TIMING_OFFSET : 0;
Assert.That(score.Replay.Frames[0].Time, Is.EqualTo(first_frame_time + (offsetApplied ? LegacyBeatmapDecoder.EARLY_VERSION_TIMING_OFFSET : 0)));
Assert.That(score.Replay.Frames[1].Time, Is.EqualTo(second_frame_time + (offsetApplied ? LegacyBeatmapDecoder.EARLY_VERSION_TIMING_OFFSET : 0)));
Assert.That(score.Replay.Frames[0].Time, Is.EqualTo(first_frame_time + offset));
Assert.That(score.Replay.Frames[1].Time, Is.EqualTo(second_frame_time + offset));
Assert.That(score.Replay.Frames[2].Time, Is.EqualTo(third_frame_time + offset));
}
}
@ -177,6 +181,94 @@ namespace osu.Game.Tests.Beatmaps.Formats
Assert.That(decodedAfterEncode.Replay.Frames[1].Time, Is.EqualTo(second_frame_time));
}
[Test]
public void TestNegativeFrameSkipped()
{
var ruleset = new OsuRuleset().RulesetInfo;
var scoreInfo = TestResources.CreateTestScoreInfo(ruleset);
var beatmap = new TestBeatmap(ruleset);
var score = new Score
{
ScoreInfo = scoreInfo,
Replay = new Replay
{
Frames = new List<ReplayFrame>
{
new OsuReplayFrame(0, new Vector2()),
new OsuReplayFrame(1000, OsuPlayfield.BASE_SIZE),
new OsuReplayFrame(500, OsuPlayfield.BASE_SIZE / 2),
new OsuReplayFrame(2000, OsuPlayfield.BASE_SIZE),
}
}
};
var decodedAfterEncode = encodeThenDecode(LegacyScoreEncoder.LATEST_VERSION, score, beatmap);
Assert.That(decodedAfterEncode.Replay.Frames, Has.Count.EqualTo(3));
Assert.That(decodedAfterEncode.Replay.Frames[0].Time, Is.EqualTo(0));
Assert.That(decodedAfterEncode.Replay.Frames[1].Time, Is.EqualTo(1000));
Assert.That(decodedAfterEncode.Replay.Frames[2].Time, Is.EqualTo(2000));
}
[Test]
public void FirstTwoFramesSwappedIfInWrongOrder()
{
var ruleset = new OsuRuleset().RulesetInfo;
var scoreInfo = TestResources.CreateTestScoreInfo(ruleset);
var beatmap = new TestBeatmap(ruleset);
var score = new Score
{
ScoreInfo = scoreInfo,
Replay = new Replay
{
Frames = new List<ReplayFrame>
{
new OsuReplayFrame(100, new Vector2()),
new OsuReplayFrame(50, OsuPlayfield.BASE_SIZE / 2),
new OsuReplayFrame(1000, OsuPlayfield.BASE_SIZE),
}
}
};
var decodedAfterEncode = encodeThenDecode(LegacyScoreEncoder.LATEST_VERSION, score, beatmap);
Assert.That(decodedAfterEncode.Replay.Frames, Has.Count.EqualTo(3));
Assert.That(decodedAfterEncode.Replay.Frames[0].Time, Is.EqualTo(0));
Assert.That(decodedAfterEncode.Replay.Frames[1].Time, Is.EqualTo(100));
Assert.That(decodedAfterEncode.Replay.Frames[2].Time, Is.EqualTo(1000));
}
[Test]
public void FirstTwoFramesPulledTowardThirdIfTheyAreAfterIt()
{
var ruleset = new OsuRuleset().RulesetInfo;
var scoreInfo = TestResources.CreateTestScoreInfo(ruleset);
var beatmap = new TestBeatmap(ruleset);
var score = new Score
{
ScoreInfo = scoreInfo,
Replay = new Replay
{
Frames = new List<ReplayFrame>
{
new OsuReplayFrame(0, new Vector2()),
new OsuReplayFrame(500, OsuPlayfield.BASE_SIZE / 2),
new OsuReplayFrame(-1500, OsuPlayfield.BASE_SIZE),
}
}
};
var decodedAfterEncode = encodeThenDecode(LegacyScoreEncoder.LATEST_VERSION, score, beatmap);
Assert.That(decodedAfterEncode.Replay.Frames, Has.Count.EqualTo(3));
Assert.That(decodedAfterEncode.Replay.Frames[0].Time, Is.EqualTo(-1500));
Assert.That(decodedAfterEncode.Replay.Frames[1].Time, Is.EqualTo(-1500));
Assert.That(decodedAfterEncode.Replay.Frames[2].Time, Is.EqualTo(-1500));
}
[Test]
public void TestCultureInvariance()
{

50
osu.Game/Scoring/Legacy/LegacyScoreDecoder.cs
View File

@ -1,4 +1,4 @@
// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
// See the LICENCE file in the repository root for full licence text.
#nullable disable
@ -21,6 +21,7 @@ using osu.Game.Rulesets;
using osu.Game.Rulesets.Mods;
using osu.Game.Rulesets.Replays;
using osu.Game.Rulesets.Scoring;
using osuTK;
using SharpCompress.Compressors.LZMA;
namespace osu.Game.Scoring.Legacy
@ -262,7 +263,7 @@ namespace osu.Game.Scoring.Legacy
private void readLegacyReplay(Replay replay, StreamReader reader)
{
float lastTime = beatmapOffset;
ReplayFrame currentFrame = null;
var legacyFrames = new List<LegacyReplayFrame>();
string[] frames = reader.ReadToEnd().Split(',');
@ -285,23 +286,44 @@ namespace osu.Game.Scoring.Legacy
lastTime += diff;
if (i < 2 && mouseX == 256 && mouseY == -500)
legacyFrames.Add(new LegacyReplayFrame(lastTime,
mouseX,
mouseY,
(ReplayButtonState)Parsing.ParseInt(split[3])));
}
// https://github.com/peppy/osu-stable-reference/blob/e53980dd76857ee899f66ce519ba1597e7874f28/osu!/GameModes/Play/ReplayWatcher.cs#L62-L67
if (legacyFrames.Count >= 2 && legacyFrames[1].Time < legacyFrames[0].Time)
{
legacyFrames[1].Time = legacyFrames[0].Time;
legacyFrames[0].Time = 0;
}
// https://github.com/peppy/osu-stable-reference/blob/e53980dd76857ee899f66ce519ba1597e7874f28/osu!/GameModes/Play/ReplayWatcher.cs#L69-L71
if (legacyFrames.Count >= 3 && legacyFrames[0].Time > legacyFrames[2].Time)
legacyFrames[0].Time = legacyFrames[1].Time = legacyFrames[2].Time;
// at the start of the replay, stable places two replay frames, at time 0 and SkipBoundary - 1, respectively.
// both frames use a position of (256, -500).
// ignore these frames as they serve no real purpose (and can even mislead ruleset-specific handlers - see mania)
if (legacyFrames.Count >= 2 && legacyFrames[1].Position == new Vector2(256, -500))
legacyFrames.RemoveAt(1);
if (legacyFrames.Count >= 1 && legacyFrames[0].Position == new Vector2(256, -500))
legacyFrames.RemoveAt(0);
ReplayFrame currentFrame = null;
foreach (var legacyFrame in legacyFrames)
{
// never allow backwards time traversal in relation to the current frame.
// this handles frames with negative delta.
// this doesn't match stable 100% as stable will do something similar to adding an interpolated "intermediate frame"
// at the point wherein time flow changes from backwards to forwards, but it'll do for now.
if (currentFrame != null && legacyFrame.Time < currentFrame.Time)
continue;
// Todo: At some point we probably want to rewind and play back the negative-time frames
// but for now we'll achieve equal playback to stable by skipping negative frames
if (diff < 0)
continue;
currentFrame = convertFrame(new LegacyReplayFrame(lastTime,
mouseX,
mouseY,
(ReplayButtonState)Parsing.ParseInt(split[3])), currentFrame);
replay.Frames.Add(currentFrame);
replay.Frames.Add(currentFrame = convertFrame(legacyFrame, currentFrame));
}
}