mirror of
https://github.com/cookiengineer/audacity
synced 2025-06-17 08:30:06 +02:00
Fix for bug 930.
Calculate with doubles rather than float. Simplify calculation of max/min peak. Slight hack to work around limitation in FloatingPointValidator. Allow 'close equality' in CheckClip(). Tested on Debian 8 and Release build on Ubuntu 14.10.
This commit is contained in:
Steve Daulton
parent
9568f97054
commit
4d0c7cd97b
@ -30,12 +30,15 @@
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#include <wx/stattext.h>
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#include <wx/textctrl.h>
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#include <wx/valtext.h>
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#include <wx/log.h>
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#include "../WaveTrack.h"
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#include "../widgets/valnum.h"
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#include "Amplify.h"
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#define EPSILON 0.000000000001 // allow for imprecise equality comparisons.
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enum
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{
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ID_Amp = 10000,
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@ -63,9 +66,9 @@ END_EVENT_TABLE()
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EffectAmplify::EffectAmplify()
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{
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mAmp = DEF_Amp;
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mRatio = powf(10.0f, mAmp / 20.0f);
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mRatio = pow(10.0, mAmp / 20.0);
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mCanClip = false;
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mPeak = 0.0f;
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mPeak = 0.0;
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SetLinearEffectFlag(true);
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}
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@ -136,7 +139,7 @@ bool EffectAmplify::SetAutomationParameters(EffectAutomationParameters & parms)
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bool EffectAmplify::Init()
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{
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mPeak = 0.0f;
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mPeak = 0.0;
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SelectedTrackListOfKindIterator iter(Track::Wave, mTracks);
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@ -157,8 +160,8 @@ bool EffectAmplify::Init()
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void EffectAmplify::Preview(bool dryOnly)
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{
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float ratio = mRatio;
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float peak = mPeak;
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double ratio = mRatio;
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double peak = mPeak;
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Effect::Preview(dryOnly);
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@ -170,13 +173,13 @@ void EffectAmplify::PopulateOrExchange(ShuttleGui & S)
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{
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if (IsBatchProcessing())
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{
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mPeak = 1.0f;
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mPeak = 1.0;
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}
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else
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{
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if (mPeak > 0.0)
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{
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mRatio = 1.0f / mPeak;
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mRatio = 1.0 / mPeak;
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}
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else
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{
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@ -191,7 +194,7 @@ void EffectAmplify::PopulateOrExchange(ShuttleGui & S)
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// Amplitude
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S.StartMultiColumn(2, wxCENTER);
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{
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FloatingPointValidator<float> vldAmp(1, &mAmp);
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FloatingPointValidator<double> vldAmp(2, &mAmp);
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vldAmp.SetRange(MIN_Amp, MAX_Amp);
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mAmpT = S.Id(ID_Amp).AddTextBox(_("Amplification (dB):"), wxT(""), 12);
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mAmpT->SetValidator(vldAmp);
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@ -207,12 +210,19 @@ void EffectAmplify::PopulateOrExchange(ShuttleGui & S)
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}
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S.EndHorizontalLay();
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// Peek
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// Peak
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S.StartMultiColumn(2, wxCENTER);
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{
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FloatingPointValidator<float> vldNewPeak(1, &mNewPeak);
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vldNewPeak.SetRange(20.0f * log10f(powf(10.0f, MIN_Amp / 20.0f) * mPeak),
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20.0f * log10f(powf(10.0f, MAX_Amp / 20.0f) * mPeak));
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FloatingPointValidator<double> vldNewPeak(2, &mNewPeak);
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double minAmp = MIN_Amp + (20.0 * log10(mPeak));
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double maxAmp = MAX_Amp + (20.0 * log10(mPeak));
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// TODO: This is a hack that should be fixed in the validator:
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// If MAX_Amp is negative, then the truncated text value will be greater
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// than the actual float value.
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// Add 0.05 to the max value, equivalent to rounding the right way.
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if (maxAmp < 0)
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maxAmp += 0.005;
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vldNewPeak.SetRange(minAmp, maxAmp);
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mNewPeakT = S.Id(ID_Peak).AddTextBox(_("New Peak Amplitude (dB):"), wxT(""), 12);
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mNewPeakT->SetValidator(vldNewPeak);
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}
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@ -238,17 +248,17 @@ void EffectAmplify::PopulateOrExchange(ShuttleGui & S)
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bool EffectAmplify::TransferDataToWindow()
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{
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// limit range of gain
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float dBInit = 20.0f*log10f(mRatio);
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float dB = TrapFloat(dBInit, MIN_Amp, MAX_Amp);
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double dBInit = 20.0*log10(mRatio);
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double dB = TrapDouble(dBInit, MIN_Amp, MAX_Amp);
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if (dB != dBInit)
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mRatio = powf(10.0f, dB / 20.0f);
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mRatio = pow(10.0, dB / 20.0);
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mAmp = 20.0f * log10f(mRatio);
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mAmp = 20.0 * log10(mRatio);
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mAmpT->GetValidator()->TransferToWindow();
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mAmpS->SetValue((int) (mAmp * SCL_Amp + 0.5f));
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mNewPeak = 20.0f * log10f(mRatio * mPeak);
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mNewPeak = 20.0 * log10(mRatio * mPeak);
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mNewPeakT->GetValidator()->TransferToWindow();
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mClip->SetValue(mCanClip);
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@ -265,13 +275,13 @@ bool EffectAmplify::TransferDataFromWindow()
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return false;
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}
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mRatio = powf(10.0f, TrapFloat(mAmp * SCL_Amp, MIN_Amp * SCL_Amp, MAX_Amp * SCL_Amp) / (20.0f * SCL_Amp));
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mRatio = pow(10.0, TrapDouble(mAmp * SCL_Amp, MIN_Amp * SCL_Amp, MAX_Amp * SCL_Amp) / (20.0 * SCL_Amp));
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mCanClip = mClip->GetValue();
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if (!mCanClip && mRatio * mPeak > 1.0f)
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if (!mCanClip && mRatio * mPeak > 1.0)
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{
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mRatio = 1.0f / mPeak;
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mRatio = 1.0 / mPeak;
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}
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return true;
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@ -281,12 +291,7 @@ bool EffectAmplify::TransferDataFromWindow()
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void EffectAmplify::CheckClip()
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{
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// On Linux (not tested other platforms), 1.0f/mPeak is calculated at higher precision
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// than the (float) value of mRatio, that is, the value is rounded in mRatio = 1/mPeak,
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// so there is no guarantee that mRatio == 1/mPeak. To test for equality, assign the value
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// of 1/mPeak to a float rather than directly comparing mRatio <= 1.0f/mPeak
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float peakInv = 1.0f/mPeak;
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EnableApply(mClip->GetValue() || (mPeak > 0.0f && mRatio <= peakInv));
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EnableApply(mClip->GetValue() || (mPeak > 0.0 && mRatio <= 1.0/mPeak + EPSILON));
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}
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void EffectAmplify::OnAmpText(wxCommandEvent & WXUNUSED(evt))
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@ -297,11 +302,11 @@ void EffectAmplify::OnAmpText(wxCommandEvent & WXUNUSED(evt))
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return;
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}
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mRatio = powf(10.0f, TrapFloat(mAmp * SCL_Amp, MIN_Amp * SCL_Amp, MAX_Amp * SCL_Amp) / (20.0f * SCL_Amp));
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mRatio = pow(10.0, TrapDouble(mAmp * SCL_Amp, MIN_Amp * SCL_Amp, MAX_Amp * SCL_Amp) / (20.0 * SCL_Amp));
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mAmpS->SetValue((int) (20.0f * log10f(mRatio) * SCL_Amp + 0.5f));
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mAmpS->SetValue((int) (20.0 * log10(mRatio) * SCL_Amp + 0.5));
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mNewPeak = 20.0f * log10f(mRatio * mPeak);
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mNewPeak = 20.0 * log10(mRatio * mPeak);
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mNewPeakT->GetValidator()->TransferToWindow();
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CheckClip();
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@ -315,12 +320,12 @@ void EffectAmplify::OnPeakText(wxCommandEvent & WXUNUSED(evt))
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return;
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}
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mRatio = powf(10.0f, mNewPeak / 20.0f) / mPeak;
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mRatio = pow(10.0, mNewPeak / 20.0) / mPeak;
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float ampInit = 20.0f * log10f(mRatio);
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mAmp = TrapFloat(ampInit, MIN_Amp, MAX_Amp);
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double ampInit = 20.0 * log10(mRatio);
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mAmp = TrapDouble(ampInit, MIN_Amp, MAX_Amp);
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if (mAmp != ampInit)
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mRatio = powf(10.0f, mAmp / 20.0f);
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mRatio = pow(10.0, mAmp / 20.0);
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mAmpT->GetValidator()->TransferToWindow();
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@ -331,21 +336,21 @@ void EffectAmplify::OnPeakText(wxCommandEvent & WXUNUSED(evt))
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void EffectAmplify::OnAmpSlider(wxCommandEvent & evt)
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{
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float dB = evt.GetInt() / SCL_Amp;
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mRatio = powf(10.0f, TrapFloat(dB, MIN_Amp, MAX_Amp) / 20.0f);
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double dB = evt.GetInt() / SCL_Amp;
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mRatio = pow(10.0, TrapDouble(dB, MIN_Amp, MAX_Amp) / 20.0);
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float dB2 = (evt.GetInt() - 1) / SCL_Amp;
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float ratio2 = powf(10.0f, TrapFloat(dB2, MIN_Amp, MAX_Amp) / 20.0f);
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double dB2 = (evt.GetInt() - 1) / SCL_Amp;
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double ratio2 = pow(10.0, TrapDouble(dB2, MIN_Amp, MAX_Amp) / 20.0);
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if (!mClip->GetValue() && mRatio * mPeak > 1.0f && ratio2 * mPeak < 1.0f)
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if (!mClip->GetValue() && mRatio * mPeak > 1.0 && ratio2 * mPeak < 1.0)
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{
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mRatio = 1.0 / mPeak;
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}
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mAmp = 20.0f * log10f(mRatio);
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mAmp = 20.0 * log10(mRatio);
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mAmpT->GetValidator()->TransferToWindow();
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mNewPeak = 20.0f * log10f(mRatio * mPeak);
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mNewPeak = 20.0 * log10(mRatio * mPeak);
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mNewPeakT->GetValidator()->TransferToWindow();
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CheckClip();
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@ -68,11 +68,11 @@ private:
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void CheckClip();
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private:
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float mPeak;
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double mPeak;
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float mRatio;
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float mAmp;
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float mNewPeak;
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double mRatio;
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double mAmp;
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double mNewPeak;
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bool mCanClip;
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wxSlider *mAmpS;
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