🛠️🐜 Antkeeper superbuild with dependencies included
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272 lines
9.6 KiB
272 lines
9.6 KiB
#include "config.h"
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#include <xmmintrin.h>
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#include <cmath>
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#include <limits>
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#include "alnumeric.h"
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#include "core/bsinc_defs.h"
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#include "defs.h"
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#include "hrtfbase.h"
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struct SSETag;
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struct BSincTag;
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struct FastBSincTag;
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#if defined(__GNUC__) && !defined(__clang__) && !defined(__SSE__)
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#pragma GCC target("sse")
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#endif
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namespace {
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constexpr uint FracPhaseBitDiff{MixerFracBits - BSincPhaseBits};
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constexpr uint FracPhaseDiffOne{1 << FracPhaseBitDiff};
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#define MLA4(x, y, z) _mm_add_ps(x, _mm_mul_ps(y, z))
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inline void ApplyCoeffs(float2 *RESTRICT Values, const size_t IrSize, const ConstHrirSpan Coeffs,
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const float left, const float right)
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{
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const __m128 lrlr{_mm_setr_ps(left, right, left, right)};
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ASSUME(IrSize >= MinIrLength);
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/* This isn't technically correct to test alignment, but it's true for
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* systems that support SSE, which is the only one that needs to know the
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* alignment of Values (which alternates between 8- and 16-byte aligned).
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*/
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if(!(reinterpret_cast<uintptr_t>(Values)&15))
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{
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for(size_t i{0};i < IrSize;i += 2)
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{
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const __m128 coeffs{_mm_load_ps(&Coeffs[i][0])};
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__m128 vals{_mm_load_ps(&Values[i][0])};
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vals = MLA4(vals, lrlr, coeffs);
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_mm_store_ps(&Values[i][0], vals);
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}
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}
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else
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{
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__m128 imp0, imp1;
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__m128 coeffs{_mm_load_ps(&Coeffs[0][0])};
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__m128 vals{_mm_loadl_pi(_mm_setzero_ps(), reinterpret_cast<__m64*>(&Values[0][0]))};
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imp0 = _mm_mul_ps(lrlr, coeffs);
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vals = _mm_add_ps(imp0, vals);
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_mm_storel_pi(reinterpret_cast<__m64*>(&Values[0][0]), vals);
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size_t td{((IrSize+1)>>1) - 1};
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size_t i{1};
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do {
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coeffs = _mm_load_ps(&Coeffs[i+1][0]);
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vals = _mm_load_ps(&Values[i][0]);
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imp1 = _mm_mul_ps(lrlr, coeffs);
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imp0 = _mm_shuffle_ps(imp0, imp1, _MM_SHUFFLE(1, 0, 3, 2));
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vals = _mm_add_ps(imp0, vals);
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_mm_store_ps(&Values[i][0], vals);
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imp0 = imp1;
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i += 2;
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} while(--td);
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vals = _mm_loadl_pi(vals, reinterpret_cast<__m64*>(&Values[i][0]));
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imp0 = _mm_movehl_ps(imp0, imp0);
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vals = _mm_add_ps(imp0, vals);
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_mm_storel_pi(reinterpret_cast<__m64*>(&Values[i][0]), vals);
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}
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}
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} // namespace
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template<>
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float *Resample_<BSincTag,SSETag>(const InterpState *state, float *RESTRICT src, uint frac,
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uint increment, const al::span<float> dst)
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{
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const float *const filter{state->bsinc.filter};
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const __m128 sf4{_mm_set1_ps(state->bsinc.sf)};
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const size_t m{state->bsinc.m};
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ASSUME(m > 0);
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src -= state->bsinc.l;
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for(float &out_sample : dst)
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{
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// Calculate the phase index and factor.
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const uint pi{frac >> FracPhaseBitDiff};
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const float pf{static_cast<float>(frac & (FracPhaseDiffOne-1)) * (1.0f/FracPhaseDiffOne)};
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// Apply the scale and phase interpolated filter.
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__m128 r4{_mm_setzero_ps()};
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{
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const __m128 pf4{_mm_set1_ps(pf)};
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const float *RESTRICT fil{filter + m*pi*2};
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const float *RESTRICT phd{fil + m};
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const float *RESTRICT scd{fil + BSincPhaseCount*2*m};
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const float *RESTRICT spd{scd + m};
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size_t td{m >> 2};
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size_t j{0u};
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do {
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/* f = ((fil + sf*scd) + pf*(phd + sf*spd)) */
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const __m128 f4 = MLA4(
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MLA4(_mm_load_ps(&fil[j]), sf4, _mm_load_ps(&scd[j])),
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pf4, MLA4(_mm_load_ps(&phd[j]), sf4, _mm_load_ps(&spd[j])));
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/* r += f*src */
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r4 = MLA4(r4, f4, _mm_loadu_ps(&src[j]));
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j += 4;
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} while(--td);
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}
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r4 = _mm_add_ps(r4, _mm_shuffle_ps(r4, r4, _MM_SHUFFLE(0, 1, 2, 3)));
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r4 = _mm_add_ps(r4, _mm_movehl_ps(r4, r4));
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out_sample = _mm_cvtss_f32(r4);
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frac += increment;
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src += frac>>MixerFracBits;
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frac &= MixerFracMask;
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}
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return dst.data();
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}
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template<>
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float *Resample_<FastBSincTag,SSETag>(const InterpState *state, float *RESTRICT src, uint frac,
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uint increment, const al::span<float> dst)
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{
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const float *const filter{state->bsinc.filter};
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const size_t m{state->bsinc.m};
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ASSUME(m > 0);
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src -= state->bsinc.l;
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for(float &out_sample : dst)
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{
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// Calculate the phase index and factor.
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const uint pi{frac >> FracPhaseBitDiff};
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const float pf{static_cast<float>(frac & (FracPhaseDiffOne-1)) * (1.0f/FracPhaseDiffOne)};
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// Apply the phase interpolated filter.
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__m128 r4{_mm_setzero_ps()};
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{
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const __m128 pf4{_mm_set1_ps(pf)};
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const float *RESTRICT fil{filter + m*pi*2};
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const float *RESTRICT phd{fil + m};
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size_t td{m >> 2};
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size_t j{0u};
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do {
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/* f = fil + pf*phd */
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const __m128 f4 = MLA4(_mm_load_ps(&fil[j]), pf4, _mm_load_ps(&phd[j]));
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/* r += f*src */
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r4 = MLA4(r4, f4, _mm_loadu_ps(&src[j]));
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j += 4;
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} while(--td);
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}
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r4 = _mm_add_ps(r4, _mm_shuffle_ps(r4, r4, _MM_SHUFFLE(0, 1, 2, 3)));
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r4 = _mm_add_ps(r4, _mm_movehl_ps(r4, r4));
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out_sample = _mm_cvtss_f32(r4);
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frac += increment;
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src += frac>>MixerFracBits;
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frac &= MixerFracMask;
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}
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return dst.data();
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}
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template<>
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void MixHrtf_<SSETag>(const float *InSamples, float2 *AccumSamples, const uint IrSize,
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const MixHrtfFilter *hrtfparams, const size_t BufferSize)
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{ MixHrtfBase<ApplyCoeffs>(InSamples, AccumSamples, IrSize, hrtfparams, BufferSize); }
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template<>
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void MixHrtfBlend_<SSETag>(const float *InSamples, float2 *AccumSamples, const uint IrSize,
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const HrtfFilter *oldparams, const MixHrtfFilter *newparams, const size_t BufferSize)
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{
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MixHrtfBlendBase<ApplyCoeffs>(InSamples, AccumSamples, IrSize, oldparams, newparams,
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BufferSize);
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}
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template<>
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void MixDirectHrtf_<SSETag>(const FloatBufferSpan LeftOut, const FloatBufferSpan RightOut,
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const al::span<const FloatBufferLine> InSamples, float2 *AccumSamples,
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float *TempBuf, HrtfChannelState *ChanState, const size_t IrSize, const size_t BufferSize)
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{
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MixDirectHrtfBase<ApplyCoeffs>(LeftOut, RightOut, InSamples, AccumSamples, TempBuf, ChanState,
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IrSize, BufferSize);
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}
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template<>
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void Mix_<SSETag>(const al::span<const float> InSamples, const al::span<FloatBufferLine> OutBuffer,
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float *CurrentGains, const float *TargetGains, const size_t Counter, const size_t OutPos)
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{
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const float delta{(Counter > 0) ? 1.0f / static_cast<float>(Counter) : 0.0f};
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const auto min_len = minz(Counter, InSamples.size());
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const auto aligned_len = minz((min_len+3) & ~size_t{3}, InSamples.size()) - min_len;
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for(FloatBufferLine &output : OutBuffer)
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{
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float *RESTRICT dst{al::assume_aligned<16>(output.data()+OutPos)};
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float gain{*CurrentGains};
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const float step{(*TargetGains-gain) * delta};
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size_t pos{0};
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if(!(std::abs(step) > std::numeric_limits<float>::epsilon()))
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gain = *TargetGains;
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else
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{
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float step_count{0.0f};
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/* Mix with applying gain steps in aligned multiples of 4. */
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if(size_t todo{min_len >> 2})
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{
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const __m128 four4{_mm_set1_ps(4.0f)};
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const __m128 step4{_mm_set1_ps(step)};
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const __m128 gain4{_mm_set1_ps(gain)};
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__m128 step_count4{_mm_setr_ps(0.0f, 1.0f, 2.0f, 3.0f)};
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do {
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const __m128 val4{_mm_load_ps(&InSamples[pos])};
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__m128 dry4{_mm_load_ps(&dst[pos])};
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/* dry += val * (gain + step*step_count) */
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dry4 = MLA4(dry4, val4, MLA4(gain4, step4, step_count4));
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_mm_store_ps(&dst[pos], dry4);
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step_count4 = _mm_add_ps(step_count4, four4);
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pos += 4;
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} while(--todo);
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/* NOTE: step_count4 now represents the next four counts after
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* the last four mixed samples, so the lowest element
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* represents the next step count to apply.
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*/
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step_count = _mm_cvtss_f32(step_count4);
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}
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/* Mix with applying left over gain steps that aren't aligned multiples of 4. */
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for(size_t leftover{min_len&3};leftover;++pos,--leftover)
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{
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dst[pos] += InSamples[pos] * (gain + step*step_count);
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step_count += 1.0f;
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}
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if(pos == Counter)
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gain = *TargetGains;
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else
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gain += step*step_count;
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/* Mix until pos is aligned with 4 or the mix is done. */
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for(size_t leftover{aligned_len&3};leftover;++pos,--leftover)
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dst[pos] += InSamples[pos] * gain;
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}
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*CurrentGains = gain;
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++CurrentGains;
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++TargetGains;
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if(!(std::abs(gain) > GainSilenceThreshold))
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continue;
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if(size_t todo{(InSamples.size()-pos) >> 2})
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{
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const __m128 gain4{_mm_set1_ps(gain)};
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do {
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const __m128 val4{_mm_load_ps(&InSamples[pos])};
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__m128 dry4{_mm_load_ps(&dst[pos])};
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dry4 = _mm_add_ps(dry4, _mm_mul_ps(val4, gain4));
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_mm_store_ps(&dst[pos], dry4);
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pos += 4;
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} while(--todo);
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}
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for(size_t leftover{(InSamples.size()-pos)&3};leftover;++pos,--leftover)
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dst[pos] += InSamples[pos] * gain;
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}
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}
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