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Allow both rate mod versions (preserve + don't preserve pitch)

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This is toggleable with a new preference call "RateModPreservesPitch" (true by default to preserve existing SM5 behavior)
This commit is contained in:
teejusb
2021-08-25 00:04:28 -07:00
parent 3111f90b75
commit 7f90093cd9
1 changed files with 32 additions and 9 deletions
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src/RageSoundReader_PitchChange.cpp
+32 -9
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@@ -9,16 +9,28 @@
*/
#include "global.h"
#include "Preference.h"
#include "RageSoundReader_PitchChange.h"
#include "RageSoundReader_SpeedChange.h"
#include "RageSoundReader_Resample_Good.h"
#include "RageLog.h"
static Preference<bool> g_bRateModPreservesPitch( "RateModPreservesPitch", true );
RageSoundReader_PitchChange::RageSoundReader_PitchChange( RageSoundReader *pSource ):
RageSoundReader_Filter(nullptr)
{
bool bPreservePitch = g_bRateModPreservesPitch.Get();
m_pSpeedChange = new RageSoundReader_SpeedChange( pSource );
m_pResample = new RageSoundReader_Resample_Good( m_pSpeedChange, m_pSpeedChange->GetSampleRate() );
if (bPreservePitch)
{
m_pResample = new RageSoundReader_Resample_Good( m_pSpeedChange, m_pSpeedChange->GetSampleRate() );
}
else
{
m_pResample = new RageSoundReader_Resample_Good( pSource, pSource->GetSampleRate() );
}
m_pSource = m_pResample;
m_fSpeedRatio = 1.0f;
m_fPitchRatio = 1.0f;
@@ -46,8 +58,10 @@ int RageSoundReader_PitchChange::Read( float *pBuf, int iFrames )
* immediately on the next Read(). When this is true, apply the ratio to the
* resampler and the speed changer simultaneously, so they take effect as
* closely together as possible. */
if( (m_fLastSetSpeedRatio != m_fSpeedRatio || m_fLastSetPitchRatio != m_fPitchRatio) &&
m_pSpeedChange->NextReadWillStep() )
bool bPreservePitch = g_bRateModPreservesPitch.Get();
if( (!bPreservePitch) ||
((m_fLastSetSpeedRatio != m_fSpeedRatio || m_fLastSetPitchRatio != m_fPitchRatio) &&
m_pSpeedChange->NextReadWillStep()) )
{
float fRate = GetStreamToSourceRatio();
@@ -58,13 +72,22 @@ int RageSoundReader_PitchChange::Read( float *pBuf, int iFrames )
/* However, the resampler has a limited granularity due to internal fixed-
* point math, and the actual ratio will be slightly different than what
* we tell it to use. The actual ratio used is fActualPitchRatio. */
m_pResample->SetRate( m_fPitchRatio );
float fActualPitchRatio = m_pResample->GetRate();
float fRequestedSpeedRatio = m_fSpeedRatio / fActualPitchRatio;
m_pSpeedChange->SetSpeedRatio( fRequestedSpeedRatio );
m_fLastSetSpeedRatio = m_fSpeedRatio;
m_fLastSetPitchRatio = m_fPitchRatio;
if (bPreservePitch)
{
m_pResample->SetRate( m_fPitchRatio );
float fActualPitchRatio = m_pResample->GetRate();
float fRequestedSpeedRatio = m_fSpeedRatio / fActualPitchRatio;
m_pSpeedChange->SetSpeedRatio( fRequestedSpeedRatio );
m_fLastSetPitchRatio = m_fPitchRatio;
m_fLastSetSpeedRatio = m_fSpeedRatio;
}
else
{
m_pResample->SetRate(m_fSpeedRatio);
m_fLastSetSpeedRatio = m_fSpeedRatio;
}
/* If we just applied a new speed and it caused the ratio to change, return
* no data, so the caller can see the new ratio. */