John Bauer
37f9178f61
Regression to figure out a line through the user's step errors to minimize that error. It then uses the slope of that line to fix the tempo and the intercept to fix the offset. Stops are adjusted as if they were originally calculated as a number of beats, ie the slope is also used to change the stops. Also fixed is a bug where the user doesn't get a chance to keep or reject the sync changes when ESCing (ZZing) from a song. R=glenn
78 lines
3.0 KiB
C++
78 lines
3.0 KiB
C++
#ifndef AdjustSync_H
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#define AdjustSync_H
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/*
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* This class defines two ways of adjusting the sync of a song.
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* The first adjusts only the offset, "on the fly". It can adjust
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* either the song itself or the machine. The other style adjusts
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* both the BPM and the offset of the song, but it needs more data.
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*/
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class TimingData;
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class AdjustSync
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{
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public:
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static TimingData *s_pTimingDataOriginal;
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static float s_fGlobalOffsetSecondsOriginal;
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/*
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* We only want to call the Reset methods before a song, not immediately after a song.
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* If we reset it at the end of a song, we have to carefully check the logic to make
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* sure we never reset it before the user gets a chance to save or revert the change.
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* Resetting at the start of the song is sufficient.
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*/
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static void ResetOriginalSyncData();
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static void ResetAutosync();
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static bool IsSyncDataChanged();
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static void SaveSyncChanges();
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static void RevertSyncChanges();
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static void HandleAutosync( float fNoteOffBySeconds, float fStepTime );
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static void HandleSongEnd();
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static void AutosyncOffset();
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static void AutosyncTempo();
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static void GetSyncChangeTextGlobal( vector<RString> &vsAddTo );
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static void GetSyncChangeTextSong( vector<RString> &vsAddTo );
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static const int OFFSET_SAMPLE_COUNT = 56;
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static float s_fAutosyncOffset[OFFSET_SAMPLE_COUNT];
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static int s_iAutosyncOffsetSample;
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static float s_fStandardDeviation;
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// Measured in seconds. If the average error is too high, we
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// reject the recorded data for the Least Squares Regression.
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static const float ERROR_TOO_HIGH;
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static vector< pair<float, float> > s_vAutosyncTempoData;
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static float s_fAverageError;
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static int s_iStepsFiltered;
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};
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#endif
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/*
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* (c) 2003-2006 Chris Danford, John Bauer
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* All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, and/or sell copies of the Software, and to permit persons to
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* whom the Software is furnished to do so, provided that the above
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* copyright notice(s) and this permission notice appear in all copies of
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* the Software and that both the above copyright notice(s) and this
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* permission notice appear in supporting documentation.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF
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* THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS
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* INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT
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* OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
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* OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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