Remove typeInfo struct from lmms_basics.h (#7380)

* remove typeInfo struct from lmms_basics.h

* Code review

Co-authored-by: saker <sakertooth@gmail.com>

* converted epsilon to a constant

* renamed to approximatelyEqual and moved to top

---------

Co-authored-by: saker <sakertooth@gmail.com>

include/InstrumentTrack.h

@@ -26,6 +26,8 @@
 #ifndef LMMS_INSTRUMENT_TRACK_H
 #define LMMS_INSTRUMENT_TRACK_H
 
+#include <limits>
+
 #include "AudioPort.h"
 #include "InstrumentFunctions.h"
 #include "InstrumentSoundShaping.h"

include/lmms_basics.h

@@ -26,7 +26,6 @@
 #define LMMS_TYPES_H
 
 #include <cstddef>
-#include <limits>
 
 #include "lmmsconfig.h"
 
@@ -55,57 +54,6 @@ using mix_ch_t = uint16_t;		// Mixer-channel (0 to MAX_CHANNEL)
 
 using jo_id_t = uint32_t; // (unique) ID of a journalling object
 
-// windows headers define "min" and "max" macros, breaking the methods bwloe
-#undef min
-#undef max
-
-template<typename T>
-struct typeInfo
-{
-	static inline T min()
-	{
-		return std::numeric_limits<T>::min();
-	}
-
-	static inline T max()
-	{
-		return std::numeric_limits<T>::max();
-	}
-
-	static inline T minEps()
-	{
-		return 1;
-	}
-
-	static inline bool isEqual( T x, T y )
-	{
-		return x == y;
-	}
-
-	static inline T absVal( T t )
-	{
-		return t >= 0 ? t : -t;
-	}
-} ;
-
-
-template<>
-inline float typeInfo<float>::minEps()
-{
-	return 1.0e-10f;
-}
-
-template<>
-inline bool typeInfo<float>::isEqual( float x, float y )
-{
-	if( x == y )
-	{
-		return true;
-	}
-	return absVal( x - y ) < minEps();
-}
-
-
 
 constexpr ch_cnt_t DEFAULT_CHANNELS = 2;
 

include/lmms_constants.h

@@ -56,6 +56,8 @@ constexpr float F_E = (float) LD_E;
 constexpr float F_E_R = (float) LD_E_R;
 constexpr float F_SQRT_2 = (float) LD_SQRT_2;
 
+constexpr float F_EPSILON = 1.0e-10f; // 10^-10
+
 // Microtuner
 constexpr unsigned int MaxScaleCount = 10;  //!< number of scales per project
 constexpr unsigned int MaxKeymapCount = 10; //!< number of keyboard mappings per project

include/lmms_math.h

@@ -37,6 +37,11 @@
 namespace lmms
 {
 
+static inline bool approximatelyEqual(float x, float y)
+{
+	return x == y ? true : std::abs(x - y) < F_EPSILON;
+}
+
 #ifdef __INTEL_COMPILER
 
 static inline float absFraction( const float _x )

plugins/Eq/EqCurve.cpp

@@ -31,6 +31,7 @@
 #include "embed.h"
 #include "Engine.h"
 #include "lmms_constants.h"
+#include "lmms_math.h"
 
 
 namespace lmms::gui
@@ -65,7 +66,7 @@ QRectF EqHandle::boundingRect() const
 
 float EqHandle::freqToXPixel( float freq , int w )
 {
-	if (typeInfo<float>::isEqual(freq, 0.0f)) { return 0.0f; }
+	if (approximatelyEqual(freq, 0.0f)) { return 0.0f; }
 	float min = log10f( 20 );
 	float max = log10f( 20000 );
 	float range = max - min;

src/core/AutomatableModel.cpp

@@ -354,8 +354,7 @@ float AutomatableModel::inverseScaledValue( float value ) const
 template<class T>
 void roundAt( T& value, const T& where, const T& step_size )
 {
-	if (std::abs(value - where)
-		< typeInfo<float>::minEps() * std::abs(step_size))
+	if (std::abs(value - where) < F_EPSILON * std::abs(step_size))
 	{
 		value = where;
 	}
@@ -583,7 +582,7 @@ float AutomatableModel::controllerValue( int frameOffset ) const
 				"lacks implementation for a scale type");
 			break;
 		}
-		if( typeInfo<float>::isEqual( m_step, 1 ) && m_hasStrictStepSize )
+		if (approximatelyEqual(m_step, 1) && m_hasStrictStepSize)
 		{
 			return std::round(v);
 		}

src/core/Effect.cpp

@@ -32,6 +32,7 @@
 
 #include "ConfigManager.h"
 #include "SampleFrame.h"
+#include "lmms_constants.h"
 
 namespace lmms
 {
@@ -154,7 +155,7 @@ void Effect::checkGate( double _out_sum )
 
 	// Check whether we need to continue processing input.  Restart the
 	// counter if the threshold has been exceeded.
-	if( _out_sum - gate() <= typeInfo<float>::minEps() )
+	if (_out_sum - gate() <= F_EPSILON)
 	{
 		incrementBufferCount();
 		if( bufferCount() > timeout() )

src/core/NotePlayHandle.cpp

@@ -568,7 +568,7 @@ void NotePlayHandle::processTimePos(const TimePos& time, float pitchValue, bool
 	else
 	{
 		const float v = detuning()->automationClip()->valueAt(time - songGlobalParentOffset() - pos());
-		if (!typeInfo<float>::isEqual(v, m_baseDetuning->value()))
+		if (!approximatelyEqual(v, m_baseDetuning->value()))
 		{
 			m_baseDetuning->setValue(v);
 			updateFrequency();

src/core/Oscillator.cpp

@@ -535,7 +535,7 @@ void Oscillator::updateFM( SampleFrame* _ab, const fpp_t _frames,
 // should be called every time phase-offset is changed...
 inline void Oscillator::recalcPhase()
 {
-	if( !typeInfo<float>::isEqual( m_phaseOffset, m_ext_phaseOffset ) )
+	if (!approximatelyEqual(m_phaseOffset, m_ext_phaseOffset))
 	{
 		m_phase -= m_phaseOffset;
 		m_phaseOffset = m_ext_phaseOffset;

src/core/PresetPreviewPlayHandle.cpp

@@ -175,7 +175,7 @@ PresetPreviewPlayHandle::PresetPreviewPlayHandle( const QString & _preset_file,
 	// create note-play-handle for it
 	m_previewNote = NotePlayHandleManager::acquire(
 			s_previewTC->previewInstrumentTrack(), 0,
-			typeInfo<f_cnt_t>::max() / 2,
+			std::numeric_limits<f_cnt_t>::max() / 2,
 				Note( 0, 0, DefaultKey, 100 ) );
 
 	setAudioPort( s_previewTC->previewInstrumentTrack()->audioPort() );

src/tracks/InstrumentTrack.cpp

@@ -342,7 +342,7 @@ void InstrumentTrack::processInEvent( const MidiEvent& event, const TimePos& tim
 					NotePlayHandle* nph =
 						NotePlayHandleManager::acquire(
 								this, offset,
-								typeInfo<f_cnt_t>::max() / 2,
+								std::numeric_limits<f_cnt_t>::max() / 2,
 								Note(TimePos(), Engine::getSong()->getPlayPos(Engine::getSong()->playMode()),
 										event.key(), event.volume(midiPort()->baseVelocity())),
 								nullptr, event.channel(),