399 lines
13 KiB
C
399 lines
13 KiB
C
|
/*
|
||
|
|
* IntMixer.h
|
||
|
|
* ----------
|
||
|
|
* Purpose: Fixed point mixer classes
|
||
|
|
* Notes : (currently none)
|
||
|
|
* Authors: Olivier Lapicque
|
||
|
|
* OpenMPT Devs
|
||
|
|
* The OpenMPT source code is released under the BSD license. Read LICENSE for more details.
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
#pragma once
|
||
|
|
|
||
|
|
#include "openmpt/all/BuildSettings.hpp"
|
||
|
|
|
||
|
|
#include "Resampler.h"
|
||
|
|
#include "MixerInterface.h"
|
||
|
|
#include "Paula.h"
|
||
|
|
|
||
|
|
OPENMPT_NAMESPACE_BEGIN
|
||
|
|
|
||
|
|
template<int channelsOut, int channelsIn, typename out, typename in, size_t mixPrecision>
|
||
|
|
struct IntToIntTraits : public MixerTraits<channelsOut, channelsIn, out, in>
|
||
|
|
{
|
||
|
|
typedef MixerTraits<channelsOut, channelsIn, out, in> base_t;
|
||
|
|
typedef typename base_t::input_t input_t;
|
||
|
|
typedef typename base_t::output_t output_t;
|
||
|
|
|
||
|
|
static MPT_CONSTEXPRINLINE output_t Convert(const input_t x)
|
||
|
|
{
|
||
|
|
static_assert(std::numeric_limits<input_t>::is_integer, "Input must be integer");
|
||
|
|
static_assert(std::numeric_limits<output_t>::is_integer, "Output must be integer");
|
||
|
|
static_assert(sizeof(out) * 8 >= mixPrecision, "Mix precision is higher than output type can handle");
|
||
|
|
static_assert(sizeof(in) * 8 <= mixPrecision, "Mix precision is lower than input type");
|
||
|
|
return static_cast<output_t>(x) * (1<<(mixPrecision - sizeof(in) * 8));
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
typedef IntToIntTraits<2, 1, mixsample_t, int8, 16> Int8MToIntS;
|
||
|
|
typedef IntToIntTraits<2, 1, mixsample_t, int16, 16> Int16MToIntS;
|
||
|
|
typedef IntToIntTraits<2, 2, mixsample_t, int8, 16> Int8SToIntS;
|
||
|
|
typedef IntToIntTraits<2, 2, mixsample_t, int16, 16> Int16SToIntS;
|
||
|
|
|
||
|
|
|
||
|
|
//////////////////////////////////////////////////////////////////////////
|
||
|
|
// Interpolation templates
|
||
|
|
|
||
|
|
|
||
|
|
template<class Traits>
|
||
|
|
struct AmigaBlepInterpolation
|
||
|
|
{
|
||
|
|
SamplePosition subIncrement;
|
||
|
|
Paula::State &paula;
|
||
|
|
const Paula::BlepArray &WinSincIntegral;
|
||
|
|
const int numSteps;
|
||
|
|
unsigned int remainingSamples = 0;
|
||
|
|
|
||
|
|
MPT_FORCEINLINE AmigaBlepInterpolation(ModChannel &chn, const CResampler &resampler, unsigned int numSamples)
|
||
|
|
: paula{chn.paulaState}
|
||
|
|
, WinSincIntegral{resampler.blepTables.GetAmigaTable(resampler.m_Settings.emulateAmiga, chn.dwFlags[CHN_AMIGAFILTER])}
|
||
|
|
, numSteps{chn.paulaState.numSteps}
|
||
|
|
{
|
||
|
|
if(numSteps)
|
||
|
|
{
|
||
|
|
subIncrement = chn.increment / numSteps;
|
||
|
|
// May we read past the start or end of sample if we do partial sample increments?
|
||
|
|
// If that's the case, don't apply any sub increments on the source sample if we reached the last output sample
|
||
|
|
// Note that this should only happen with notes well outside the Amiga note range, e.g. in software-mixed formats like MED
|
||
|
|
const int32 targetPos = (chn.position + chn.increment * numSamples).GetInt();
|
||
|
|
if(static_cast<SmpLength>(targetPos) > chn.nLength)
|
||
|
|
remainingSamples = numSamples;
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
MPT_FORCEINLINE void operator() (typename Traits::outbuf_t &outSample, const typename Traits::input_t * const MPT_RESTRICT inBuffer, const uint32 posLo)
|
||
|
|
{
|
||
|
|
if(--remainingSamples == 0)
|
||
|
|
subIncrement = {};
|
||
|
|
|
||
|
|
SamplePosition pos(0, posLo);
|
||
|
|
// First, process steps of full length (one Amiga clock interval)
|
||
|
|
for(int step = numSteps; step > 0; step--)
|
||
|
|
{
|
||
|
|
typename Traits::output_t inSample = 0;
|
||
|
|
int32 posInt = pos.GetInt() * Traits::numChannelsIn;
|
||
|
|
for(int32 i = 0; i < Traits::numChannelsIn; i++)
|
||
|
|
inSample += Traits::Convert(inBuffer[posInt + i]);
|
||
|
|
paula.InputSample(static_cast<int16>(inSample / (4 * Traits::numChannelsIn)));
|
||
|
|
paula.Clock(Paula::MINIMUM_INTERVAL);
|
||
|
|
pos += subIncrement;
|
||
|
|
}
|
||
|
|
paula.remainder += paula.stepRemainder;
|
||
|
|
|
||
|
|
// Now, process any remaining integer clock amount < MINIMUM_INTERVAL
|
||
|
|
uint32 remainClocks = paula.remainder.GetInt();
|
||
|
|
if(remainClocks)
|
||
|
|
{
|
||
|
|
typename Traits::output_t inSample = 0;
|
||
|
|
int32 posInt = pos.GetInt() * Traits::numChannelsIn;
|
||
|
|
for(int32 i = 0; i < Traits::numChannelsIn; i++)
|
||
|
|
inSample += Traits::Convert(inBuffer[posInt + i]);
|
||
|
|
paula.InputSample(static_cast<int16>(inSample / (4 * Traits::numChannelsIn)));
|
||
|
|
paula.Clock(remainClocks);
|
||
|
|
paula.remainder.RemoveInt();
|
||
|
|
}
|
||
|
|
|
||
|
|
auto out = paula.OutputSample(WinSincIntegral);
|
||
|
|
for(int i = 0; i < Traits::numChannelsOut; i++)
|
||
|
|
outSample[i] = out;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
template<class Traits>
|
||
|
|
struct LinearInterpolation
|
||
|
|
{
|
||
|
|
MPT_FORCEINLINE LinearInterpolation(const ModChannel &, const CResampler &, unsigned int) { }
|
||
|
|
|
||
|
|
MPT_FORCEINLINE void operator() (typename Traits::outbuf_t &outSample, const typename Traits::input_t * const MPT_RESTRICT inBuffer, const uint32 posLo)
|
||
|
|
{
|
||
|
|
static_assert(static_cast<int>(Traits::numChannelsIn) <= static_cast<int>(Traits::numChannelsOut), "Too many input channels");
|
||
|
|
const typename Traits::output_t fract = posLo >> 18u;
|
||
|
|
|
||
|
|
for(int i = 0; i < Traits::numChannelsIn; i++)
|
||
|
|
{
|
||
|
|
typename Traits::output_t srcVol = Traits::Convert(inBuffer[i]);
|
||
|
|
typename Traits::output_t destVol = Traits::Convert(inBuffer[i + Traits::numChannelsIn]);
|
||
|
|
|
||
|
|
outSample[i] = srcVol + ((fract * (destVol - srcVol)) / 16384);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
template<class Traits>
|
||
|
|
struct FastSincInterpolation
|
||
|
|
{
|
||
|
|
MPT_FORCEINLINE FastSincInterpolation(const ModChannel &, const CResampler &, unsigned int) { }
|
||
|
|
|
||
|
|
MPT_FORCEINLINE void operator() (typename Traits::outbuf_t &outSample, const typename Traits::input_t * const MPT_RESTRICT inBuffer, const uint32 posLo)
|
||
|
|
{
|
||
|
|
static_assert(static_cast<int>(Traits::numChannelsIn) <= static_cast<int>(Traits::numChannelsOut), "Too many input channels");
|
||
|
|
const int16 *lut = CResampler::FastSincTable + ((posLo >> 22) & 0x3FC);
|
||
|
|
|
||
|
|
for(int i = 0; i < Traits::numChannelsIn; i++)
|
||
|
|
{
|
||
|
|
outSample[i] =
|
||
|
|
(lut[0] * Traits::Convert(inBuffer[i - Traits::numChannelsIn])
|
||
|
|
+ lut[1] * Traits::Convert(inBuffer[i])
|
||
|
|
+ lut[2] * Traits::Convert(inBuffer[i + Traits::numChannelsIn])
|
||
|
|
+ lut[3] * Traits::Convert(inBuffer[i + 2 * Traits::numChannelsIn])) / 16384;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
template<class Traits>
|
||
|
|
struct PolyphaseInterpolation
|
||
|
|
{
|
||
|
|
const SINC_TYPE *sinc;
|
||
|
|
|
||
|
|
MPT_FORCEINLINE PolyphaseInterpolation(const ModChannel &chn, const CResampler &resampler, unsigned int)
|
||
|
|
{
|
||
|
|
#ifdef MODPLUG_TRACKER
|
||
|
|
// Otherwise causes "warning C4100: 'resampler' : unreferenced formal parameter"
|
||
|
|
// because all 3 tables are static members.
|
||
|
|
// #pragma warning fails with this templated case for unknown reasons.
|
||
|
|
MPT_UNREFERENCED_PARAMETER(resampler);
|
||
|
|
#endif // MODPLUG_TRACKER
|
||
|
|
sinc = (((chn.increment > SamplePosition(0x130000000ll)) || (chn.increment < SamplePosition(-0x130000000ll))) ?
|
||
|
|
(((chn.increment > SamplePosition(0x180000000ll)) || (chn.increment < SamplePosition(-0x180000000ll))) ? resampler.gDownsample2x : resampler.gDownsample13x) : resampler.gKaiserSinc);
|
||
|
|
}
|
||
|
|
|
||
|
|
MPT_FORCEINLINE void operator() (typename Traits::outbuf_t &outSample, const typename Traits::input_t * const MPT_RESTRICT inBuffer, const uint32 posLo)
|
||
|
|
{
|
||
|
|
static_assert(static_cast<int>(Traits::numChannelsIn) <= static_cast<int>(Traits::numChannelsOut), "Too many input channels");
|
||
|
|
const SINC_TYPE *lut = sinc + ((posLo >> (32 - SINC_PHASES_BITS)) & SINC_MASK) * SINC_WIDTH;
|
||
|
|
|
||
|
|
for(int i = 0; i < Traits::numChannelsIn; i++)
|
||
|
|
{
|
||
|
|
outSample[i] =
|
||
|
|
(lut[0] * Traits::Convert(inBuffer[i - 3 * Traits::numChannelsIn])
|
||
|
|
+ lut[1] * Traits::Convert(inBuffer[i - 2 * Traits::numChannelsIn])
|
||
|
|
+ lut[2] * Traits::Convert(inBuffer[i - Traits::numChannelsIn])
|
||
|
|
+ lut[3] * Traits::Convert(inBuffer[i])
|
||
|
|
+ lut[4] * Traits::Convert(inBuffer[i + Traits::numChannelsIn])
|
||
|
|
+ lut[5] * Traits::Convert(inBuffer[i + 2 * Traits::numChannelsIn])
|
||
|
|
+ lut[6] * Traits::Convert(inBuffer[i + 3 * Traits::numChannelsIn])
|
||
|
|
+ lut[7] * Traits::Convert(inBuffer[i + 4 * Traits::numChannelsIn])) / (1 << SINC_QUANTSHIFT);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
template<class Traits>
|
||
|
|
struct FIRFilterInterpolation
|
||
|
|
{
|
||
|
|
const int16 *WFIRlut;
|
||
|
|
|
||
|
|
MPT_FORCEINLINE FIRFilterInterpolation(const ModChannel &, const CResampler &resampler, unsigned int)
|
||
|
|
{
|
||
|
|
WFIRlut = resampler.m_WindowedFIR.lut;
|
||
|
|
}
|
||
|
|
|
||
|
|
MPT_FORCEINLINE void operator() (typename Traits::outbuf_t &outSample, const typename Traits::input_t * const MPT_RESTRICT inBuffer, const uint32 posLo)
|
||
|
|
{
|
||
|
|
static_assert(static_cast<int>(Traits::numChannelsIn) <= static_cast<int>(Traits::numChannelsOut), "Too many input channels");
|
||
|
|
const int16 * const lut = WFIRlut + ((((posLo >> 16) + WFIR_FRACHALVE) >> WFIR_FRACSHIFT) & WFIR_FRACMASK);
|
||
|
|
|
||
|
|
for(int i = 0; i < Traits::numChannelsIn; i++)
|
||
|
|
{
|
||
|
|
typename Traits::output_t vol1 =
|
||
|
|
(lut[0] * Traits::Convert(inBuffer[i - 3 * Traits::numChannelsIn]))
|
||
|
|
+ (lut[1] * Traits::Convert(inBuffer[i - 2 * Traits::numChannelsIn]))
|
||
|
|
+ (lut[2] * Traits::Convert(inBuffer[i - Traits::numChannelsIn]))
|
||
|
|
+ (lut[3] * Traits::Convert(inBuffer[i]));
|
||
|
|
typename Traits::output_t vol2 =
|
||
|
|
(lut[4] * Traits::Convert(inBuffer[i + 1 * Traits::numChannelsIn]))
|
||
|
|
+ (lut[5] * Traits::Convert(inBuffer[i + 2 * Traits::numChannelsIn]))
|
||
|
|
+ (lut[6] * Traits::Convert(inBuffer[i + 3 * Traits::numChannelsIn]))
|
||
|
|
+ (lut[7] * Traits::Convert(inBuffer[i + 4 * Traits::numChannelsIn]));
|
||
|
|
outSample[i] = ((vol1 / 2) + (vol2 / 2)) / (1 << (WFIR_16BITSHIFT - 1));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
//////////////////////////////////////////////////////////////////////////
|
||
|
|
// Mixing templates (add sample to stereo mix)
|
||
|
|
|
||
|
|
template<class Traits>
|
||
|
|
struct NoRamp
|
||
|
|
{
|
||
|
|
typename Traits::output_t lVol, rVol;
|
||
|
|
|
||
|
|
MPT_FORCEINLINE NoRamp(const ModChannel &chn)
|
||
|
|
{
|
||
|
|
lVol = chn.leftVol;
|
||
|
|
rVol = chn.rightVol;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
struct Ramp
|
||
|
|
{
|
||
|
|
ModChannel &channel;
|
||
|
|
int32 lRamp, rRamp;
|
||
|
|
|
||
|
|
MPT_FORCEINLINE Ramp(ModChannel &chn)
|
||
|
|
: channel{chn}
|
||
|
|
{
|
||
|
|
lRamp = chn.rampLeftVol;
|
||
|
|
rRamp = chn.rampRightVol;
|
||
|
|
}
|
||
|
|
|
||
|
|
MPT_FORCEINLINE ~Ramp()
|
||
|
|
{
|
||
|
|
channel.rampLeftVol = lRamp; channel.leftVol = lRamp >> VOLUMERAMPPRECISION;
|
||
|
|
channel.rampRightVol = rRamp; channel.rightVol = rRamp >> VOLUMERAMPPRECISION;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
// Legacy optimization: If chn.nLeftVol == chn.nRightVol, save one multiplication instruction
|
||
|
|
template<class Traits>
|
||
|
|
struct MixMonoFastNoRamp : public NoRamp<Traits>
|
||
|
|
{
|
||
|
|
typedef NoRamp<Traits> base_t;
|
||
|
|
MPT_FORCEINLINE void operator() (const typename Traits::outbuf_t &outSample, const ModChannel &, typename Traits::output_t * const MPT_RESTRICT outBuffer)
|
||
|
|
{
|
||
|
|
typename Traits::output_t vol = outSample[0] * base_t::lVol;
|
||
|
|
for(int i = 0; i < Traits::numChannelsOut; i++)
|
||
|
|
{
|
||
|
|
outBuffer[i] += vol;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
template<class Traits>
|
||
|
|
struct MixMonoNoRamp : public NoRamp<Traits>
|
||
|
|
{
|
||
|
|
typedef NoRamp<Traits> base_t;
|
||
|
|
MPT_FORCEINLINE void operator() (const typename Traits::outbuf_t &outSample, const ModChannel &, typename Traits::output_t * const MPT_RESTRICT outBuffer)
|
||
|
|
{
|
||
|
|
outBuffer[0] += outSample[0] * base_t::lVol;
|
||
|
|
outBuffer[1] += outSample[0] * base_t::rVol;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
template<class Traits>
|
||
|
|
struct MixMonoRamp : public Ramp
|
||
|
|
{
|
||
|
|
MPT_FORCEINLINE void operator() (const typename Traits::outbuf_t &outSample, const ModChannel &chn, typename Traits::output_t * const MPT_RESTRICT outBuffer)
|
||
|
|
{
|
||
|
|
lRamp += chn.leftRamp;
|
||
|
|
rRamp += chn.rightRamp;
|
||
|
|
outBuffer[0] += outSample[0] * (lRamp >> VOLUMERAMPPRECISION);
|
||
|
|
outBuffer[1] += outSample[0] * (rRamp >> VOLUMERAMPPRECISION);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
template<class Traits>
|
||
|
|
struct MixStereoNoRamp : public NoRamp<Traits>
|
||
|
|
{
|
||
|
|
typedef NoRamp<Traits> base_t;
|
||
|
|
MPT_FORCEINLINE void operator() (const typename Traits::outbuf_t &outSample, const ModChannel &, typename Traits::output_t * const MPT_RESTRICT outBuffer)
|
||
|
|
{
|
||
|
|
outBuffer[0] += outSample[0] * base_t::lVol;
|
||
|
|
outBuffer[1] += outSample[1] * base_t::rVol;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
template<class Traits>
|
||
|
|
struct MixStereoRamp : public Ramp
|
||
|
|
{
|
||
|
|
MPT_FORCEINLINE void operator() (const typename Traits::outbuf_t &outSample, const ModChannel &chn, typename Traits::output_t * const MPT_RESTRICT outBuffer)
|
||
|
|
{
|
||
|
|
lRamp += chn.leftRamp;
|
||
|
|
rRamp += chn.rightRamp;
|
||
|
|
outBuffer[0] += outSample[0] * (lRamp >> VOLUMERAMPPRECISION);
|
||
|
|
outBuffer[1] += outSample[1] * (rRamp >> VOLUMERAMPPRECISION);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
//////////////////////////////////////////////////////////////////////////
|
||
|
|
// Filter templates
|
||
|
|
|
||
|
|
|
||
|
|
template<class Traits>
|
||
|
|
struct NoFilter
|
||
|
|
{
|
||
|
|
MPT_FORCEINLINE NoFilter(const ModChannel &) { }
|
||
|
|
|
||
|
|
MPT_FORCEINLINE void operator() (const typename Traits::outbuf_t &, const ModChannel &) { }
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
// Resonant filter
|
||
|
|
template<class Traits>
|
||
|
|
struct ResonantFilter
|
||
|
|
{
|
||
|
|
ModChannel &channel;
|
||
|
|
// Filter history
|
||
|
|
typename Traits::output_t fy[Traits::numChannelsIn][2];
|
||
|
|
|
||
|
|
MPT_FORCEINLINE ResonantFilter(ModChannel &chn)
|
||
|
|
: channel{chn}
|
||
|
|
{
|
||
|
|
for(int i = 0; i < Traits::numChannelsIn; i++)
|
||
|
|
{
|
||
|
|
fy[i][0] = chn.nFilter_Y[i][0];
|
||
|
|
fy[i][1] = chn.nFilter_Y[i][1];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
MPT_FORCEINLINE ~ResonantFilter()
|
||
|
|
{
|
||
|
|
for(int i = 0; i < Traits::numChannelsIn; i++)
|
||
|
|
{
|
||
|
|
channel.nFilter_Y[i][0] = fy[i][0];
|
||
|
|
channel.nFilter_Y[i][1] = fy[i][1];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// To avoid a precision loss in the state variables especially with quiet samples at low cutoff and high mix rate, we pre-amplify the sample.
|
||
|
|
#define MIXING_FILTER_PREAMP 256
|
||
|
|
// Filter values are clipped to double the input range
|
||
|
|
#define ClipFilter(x) Clamp<typename Traits::output_t, typename Traits::output_t>(x, int16_min * 2 * MIXING_FILTER_PREAMP, int16_max * 2 * MIXING_FILTER_PREAMP)
|
||
|
|
|
||
|
|
MPT_FORCEINLINE void operator() (typename Traits::outbuf_t &outSample, const ModChannel &chn)
|
||
|
|
{
|
||
|
|
static_assert(static_cast<int>(Traits::numChannelsIn) <= static_cast<int>(Traits::numChannelsOut), "Too many input channels");
|
||
|
|
|
||
|
|
for(int i = 0; i < Traits::numChannelsIn; i++)
|
||
|
|
{
|
||
|
|
const auto inputAmp = outSample[i] * MIXING_FILTER_PREAMP;
|
||
|
|
typename Traits::output_t val = static_cast<typename Traits::output_t>(mpt::rshift_signed(
|
||
|
|
Util::mul32to64(inputAmp, chn.nFilter_A0) +
|
||
|
|
Util::mul32to64(ClipFilter(fy[i][0]), chn.nFilter_B0) +
|
||
|
|
Util::mul32to64(ClipFilter(fy[i][1]), chn.nFilter_B1) +
|
||
|
|
(1 << (MIXING_FILTER_PRECISION - 1)), MIXING_FILTER_PRECISION));
|
||
|
|
fy[i][1] = fy[i][0];
|
||
|
|
fy[i][0] = val - (inputAmp & chn.nFilter_HP);
|
||
|
|
outSample[i] = val / MIXING_FILTER_PREAMP;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#undef ClipFilter
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
OPENMPT_NAMESPACE_END
|