8 #include "core/bsinc_defs.h"
9 #include "core/cubic_defs.h"
23 constexpr uint BsincPhaseDiffBits{MixerFracBits - BSincPhaseBits};
24 constexpr uint BsincPhaseDiffOne{1 << BsincPhaseDiffBits};
25 constexpr uint BsincPhaseDiffMask{BsincPhaseDiffOne - 1u};
27 constexpr uint CubicPhaseDiffBits{MixerFracBits - CubicPhaseBits};
28 constexpr uint CubicPhaseDiffOne{1 << CubicPhaseDiffBits};
29 constexpr uint CubicPhaseDiffMask{CubicPhaseDiffOne - 1u};
31 inline float do_point(const InterpState&, const float *RESTRICT vals, const uint)
33 inline float do_lerp(const InterpState&, const float *RESTRICT vals, const uint frac)
34 { return lerpf(vals[0], vals[1], static_cast<float>(frac)*(1.0f/MixerFracOne)); }
35 inline float do_cubic(const InterpState &istate, const float *RESTRICT vals, const uint frac)
37 /* Calculate the phase index and factor. */
38 const uint pi{frac >> CubicPhaseDiffBits};
39 const float pf{static_cast<float>(frac&CubicPhaseDiffMask) * (1.0f/CubicPhaseDiffOne)};
41 const float *RESTRICT fil{al::assume_aligned<16>(istate.cubic.filter[pi].mCoeffs)};
42 const float *RESTRICT phd{al::assume_aligned<16>(istate.cubic.filter[pi].mDeltas)};
44 /* Apply the phase interpolated filter. */
45 return (fil[0] + pf*phd[0])*vals[0] + (fil[1] + pf*phd[1])*vals[1]
46 + (fil[2] + pf*phd[2])*vals[2] + (fil[3] + pf*phd[3])*vals[3];
48 inline float do_bsinc(const InterpState &istate, const float *RESTRICT vals, const uint frac)
50 const size_t m{istate.bsinc.m};
53 /* Calculate the phase index and factor. */
54 const uint pi{frac >> BsincPhaseDiffBits};
55 const float pf{static_cast<float>(frac&BsincPhaseDiffMask) * (1.0f/BsincPhaseDiffOne)};
57 const float *RESTRICT fil{istate.bsinc.filter + m*pi*2};
58 const float *RESTRICT phd{fil + m};
59 const float *RESTRICT scd{fil + BSincPhaseCount*2*m};
60 const float *RESTRICT spd{scd + m};
62 /* Apply the scale and phase interpolated filter. */
64 for(size_t j_f{0};j_f < m;j_f++)
65 r += (fil[j_f] + istate.bsinc.sf*scd[j_f] + pf*(phd[j_f] + istate.bsinc.sf*spd[j_f])) * vals[j_f];
68 inline float do_fastbsinc(const InterpState &istate, const float *RESTRICT vals, const uint frac)
70 const size_t m{istate.bsinc.m};
73 /* Calculate the phase index and factor. */
74 const uint pi{frac >> BsincPhaseDiffBits};
75 const float pf{static_cast<float>(frac&BsincPhaseDiffMask) * (1.0f/BsincPhaseDiffOne)};
77 const float *RESTRICT fil{istate.bsinc.filter + m*pi*2};
78 const float *RESTRICT phd{fil + m};
80 /* Apply the phase interpolated filter. */
82 for(size_t j_f{0};j_f < m;j_f++)
83 r += (fil[j_f] + pf*phd[j_f]) * vals[j_f];
87 using SamplerT = float(&)(const InterpState&, const float*RESTRICT, const uint);
88 template<SamplerT Sampler>
89 void DoResample(const InterpState *state, const float *RESTRICT src, uint frac,
90 const uint increment, const al::span<float> dst)
92 const InterpState istate{*state};
93 ASSUME(frac < MixerFracOne);
96 out = Sampler(istate, src, frac);
99 src += frac>>MixerFracBits;
100 frac &= MixerFracMask;
104 inline void ApplyCoeffs(float2 *RESTRICT Values, const size_t IrSize, const ConstHrirSpan Coeffs,
105 const float left, const float right)
107 ASSUME(IrSize >= MinIrLength);
108 for(size_t c{0};c < IrSize;++c)
110 Values[c][0] += Coeffs[c][0] * left;
111 Values[c][1] += Coeffs[c][1] * right;
115 force_inline void MixLine(const al::span<const float> InSamples, float *RESTRICT dst,
116 float &CurrentGain, const float TargetGain, const float delta, const size_t min_len,
119 float gain{CurrentGain};
120 const float step{(TargetGain-gain) * delta};
123 if(!(std::abs(step) > std::numeric_limits<float>::epsilon()))
127 float step_count{0.0f};
128 for(;pos != min_len;++pos)
130 dst[pos] += InSamples[pos] * (gain + step*step_count);
136 gain += step*step_count;
140 if(!(std::abs(gain) > GainSilenceThreshold))
142 for(;pos != InSamples.size();++pos)
143 dst[pos] += InSamples[pos] * gain;
149 void Resample_<PointTag,CTag>(const InterpState *state, const float *RESTRICT src, uint frac,
150 const uint increment, const al::span<float> dst)
151 { DoResample<do_point>(state, src, frac, increment, dst); }
154 void Resample_<LerpTag,CTag>(const InterpState *state, const float *RESTRICT src, uint frac,
155 const uint increment, const al::span<float> dst)
156 { DoResample<do_lerp>(state, src, frac, increment, dst); }
159 void Resample_<CubicTag,CTag>(const InterpState *state, const float *RESTRICT src, uint frac,
160 const uint increment, const al::span<float> dst)
161 { DoResample<do_cubic>(state, src-1, frac, increment, dst); }
164 void Resample_<BSincTag,CTag>(const InterpState *state, const float *RESTRICT src, uint frac,
165 const uint increment, const al::span<float> dst)
166 { DoResample<do_bsinc>(state, src-state->bsinc.l, frac, increment, dst); }
169 void Resample_<FastBSincTag,CTag>(const InterpState *state, const float *RESTRICT src, uint frac,
170 const uint increment, const al::span<float> dst)
171 { DoResample<do_fastbsinc>(state, src-state->bsinc.l, frac, increment, dst); }
175 void MixHrtf_<CTag>(const float *InSamples, float2 *AccumSamples, const uint IrSize,
176 const MixHrtfFilter *hrtfparams, const size_t BufferSize)
177 { MixHrtfBase<ApplyCoeffs>(InSamples, AccumSamples, IrSize, hrtfparams, BufferSize); }
180 void MixHrtfBlend_<CTag>(const float *InSamples, float2 *AccumSamples, const uint IrSize,
181 const HrtfFilter *oldparams, const MixHrtfFilter *newparams, const size_t BufferSize)
183 MixHrtfBlendBase<ApplyCoeffs>(InSamples, AccumSamples, IrSize, oldparams, newparams,
188 void MixDirectHrtf_<CTag>(const FloatBufferSpan LeftOut, const FloatBufferSpan RightOut,
189 const al::span<const FloatBufferLine> InSamples, float2 *AccumSamples,
190 float *TempBuf, HrtfChannelState *ChanState, const size_t IrSize, const size_t BufferSize)
192 MixDirectHrtfBase<ApplyCoeffs>(LeftOut, RightOut, InSamples, AccumSamples, TempBuf, ChanState,
198 void Mix_<CTag>(const al::span<const float> InSamples, const al::span<FloatBufferLine> OutBuffer,
199 float *CurrentGains, const float *TargetGains, const size_t Counter, const size_t OutPos)
201 const float delta{(Counter > 0) ? 1.0f / static_cast<float>(Counter) : 0.0f};
202 const auto min_len = minz(Counter, InSamples.size());
204 for(FloatBufferLine &output : OutBuffer)
205 MixLine(InSamples, al::assume_aligned<16>(output.data()+OutPos), *CurrentGains++,
206 *TargetGains++, delta, min_len, Counter);
210 void Mix_<CTag>(const al::span<const float> InSamples, float *OutBuffer, float &CurrentGain,
211 const float TargetGain, const size_t Counter)
213 const float delta{(Counter > 0) ? 1.0f / static_cast<float>(Counter) : 0.0f};
214 const auto min_len = minz(Counter, InSamples.size());
216 MixLine(InSamples, al::assume_aligned<16>(OutBuffer), CurrentGain,
217 TargetGain, delta, min_len, Counter);