diff options
Diffstat (limited to 'alc/bformatdec.cpp')
| -rw-r--r-- | alc/bformatdec.cpp | 203 |
1 files changed, 0 insertions, 203 deletions
diff --git a/alc/bformatdec.cpp b/alc/bformatdec.cpp deleted file mode 100644 index 9fbe32b8..00000000 --- a/alc/bformatdec.cpp +++ /dev/null @@ -1,203 +0,0 @@ - -#include "config.h" - -#include "bformatdec.h" - -#include <algorithm> -#include <array> -#include <cassert> -#include <cmath> -#include <iterator> -#include <numeric> - -#include "AL/al.h" - -#include "almalloc.h" -#include "alu.h" -#include "ambdec.h" -#include "filters/splitter.h" -#include "opthelpers.h" - - -namespace { - -constexpr ALfloat Ambi3DDecoderHFScale[MAX_AMBI_ORDER+1] = { - 1.00000000e+00f, 1.00000000e+00f -}; -constexpr ALfloat Ambi3DDecoderHFScale2O[MAX_AMBI_ORDER+1] = { - 7.45355990e-01f, 1.00000000e+00f -}; -constexpr ALfloat Ambi3DDecoderHFScale3O[MAX_AMBI_ORDER+1] = { - 5.89792205e-01f, 8.79693856e-01f -}; - -inline auto GetDecoderHFScales(ALuint order) noexcept -> const ALfloat(&)[MAX_AMBI_ORDER+1] -{ - if(order >= 3) return Ambi3DDecoderHFScale3O; - if(order == 2) return Ambi3DDecoderHFScale2O; - return Ambi3DDecoderHFScale; -} - -inline auto GetAmbiScales(AmbDecScale scaletype) noexcept -> const std::array<float,MAX_AMBI_CHANNELS>& -{ - if(scaletype == AmbDecScale::FuMa) return AmbiScale::FromFuMa; - if(scaletype == AmbDecScale::SN3D) return AmbiScale::FromSN3D; - return AmbiScale::FromN3D; -} - -} // namespace - - -BFormatDec::BFormatDec(const AmbDecConf *conf, const bool allow_2band, const ALuint inchans, - const ALuint srate, const ALuint (&chanmap)[MAX_OUTPUT_CHANNELS]) -{ - mDualBand = allow_2band && (conf->FreqBands == 2); - if(!mDualBand) - mSamples.resize(2); - else - { - ASSUME(inchans > 0); - mSamples.resize(inchans * 2); - mSamplesHF = mSamples.data(); - mSamplesLF = mSamplesHF + inchans; - } - mNumChannels = inchans; - - mEnabled = std::accumulate(std::begin(chanmap), std::begin(chanmap)+conf->Speakers.size(), 0u, - [](ALuint mask, const ALuint &chan) noexcept -> ALuint - { return mask | (1 << chan); } - ); - - const ALfloat xover_norm{conf->XOverFreq / static_cast<float>(srate)}; - - const bool periphonic{(conf->ChanMask&AMBI_PERIPHONIC_MASK) != 0}; - const std::array<float,MAX_AMBI_CHANNELS> &coeff_scale = GetAmbiScales(conf->CoeffScale); - const size_t coeff_count{periphonic ? MAX_AMBI_CHANNELS : MAX_AMBI2D_CHANNELS}; - - if(!mDualBand) - { - for(size_t i{0u};i < conf->Speakers.size();i++) - { - ALfloat (&mtx)[MAX_AMBI_CHANNELS] = mMatrix.Single[chanmap[i]]; - for(size_t j{0},k{0};j < coeff_count;j++) - { - const size_t l{periphonic ? j : AmbiIndex::From2D[j]}; - if(!(conf->ChanMask&(1u<<l))) continue; - mtx[j] = conf->HFMatrix[i][k] / coeff_scale[l] * - ((l>=9) ? conf->HFOrderGain[3] : - (l>=4) ? conf->HFOrderGain[2] : - (l>=1) ? conf->HFOrderGain[1] : conf->HFOrderGain[0]); - ++k; - } - } - } - else - { - mXOver[0].init(xover_norm); - std::fill(std::begin(mXOver)+1, std::end(mXOver), mXOver[0]); - - const float ratio{std::pow(10.0f, conf->XOverRatio / 40.0f)}; - for(size_t i{0u};i < conf->Speakers.size();i++) - { - ALfloat (&mtx)[sNumBands][MAX_AMBI_CHANNELS] = mMatrix.Dual[chanmap[i]]; - for(size_t j{0},k{0};j < coeff_count;j++) - { - const size_t l{periphonic ? j : AmbiIndex::From2D[j]}; - if(!(conf->ChanMask&(1u<<l))) continue; - mtx[sHFBand][j] = conf->HFMatrix[i][k] / coeff_scale[l] * - ((l>=9) ? conf->HFOrderGain[3] : - (l>=4) ? conf->HFOrderGain[2] : - (l>=1) ? conf->HFOrderGain[1] : conf->HFOrderGain[0]) * ratio; - mtx[sLFBand][j] = conf->LFMatrix[i][k] / coeff_scale[l] * - ((l>=9) ? conf->LFOrderGain[3] : - (l>=4) ? conf->LFOrderGain[2] : - (l>=1) ? conf->LFOrderGain[1] : conf->LFOrderGain[0]) / ratio; - ++k; - } - } - } -} - -BFormatDec::BFormatDec(const ALuint inchans, const ALsizei chancount, - const ChannelDec (&chancoeffs)[MAX_OUTPUT_CHANNELS], - const ALuint (&chanmap)[MAX_OUTPUT_CHANNELS]) -{ - mSamples.resize(2); - mNumChannels = inchans; - - ASSUME(chancount > 0); - mEnabled = std::accumulate(std::begin(chanmap), std::begin(chanmap)+chancount, 0u, - [](ALuint mask, const ALuint &chan) noexcept -> ALuint - { return mask | (1 << chan); } - ); - - const ChannelDec *incoeffs{chancoeffs}; - auto set_coeffs = [this,inchans,&incoeffs](const ALuint chanidx) noexcept -> void - { - ALfloat (&mtx)[MAX_AMBI_CHANNELS] = mMatrix.Single[chanidx]; - const ALfloat (&coeffs)[MAX_AMBI_CHANNELS] = *(incoeffs++); - - ASSUME(inchans > 0); - std::copy_n(std::begin(coeffs), inchans, std::begin(mtx)); - }; - std::for_each(chanmap, chanmap+chancount, set_coeffs); -} - - -void BFormatDec::process(const al::span<FloatBufferLine> OutBuffer, - const FloatBufferLine *InSamples, const size_t SamplesToDo) -{ - ASSUME(SamplesToDo > 0); - - if(mDualBand) - { - for(ALuint i{0};i < mNumChannels;i++) - mXOver[i].process(mSamplesHF[i].data(), mSamplesLF[i].data(), InSamples[i].data(), - SamplesToDo); - - ALfloat (*mixmtx)[sNumBands][MAX_AMBI_CHANNELS]{mMatrix.Dual}; - ALuint enabled{mEnabled}; - for(FloatBufferLine &outbuf : OutBuffer) - { - if LIKELY(enabled&1) - { - const al::span<float> outspan{outbuf.data(), SamplesToDo}; - MixRowSamples(outspan, {(*mixmtx)[sHFBand], mNumChannels}, mSamplesHF->data(), - mSamplesHF->size()); - MixRowSamples(outspan, {(*mixmtx)[sLFBand], mNumChannels}, mSamplesLF->data(), - mSamplesLF->size()); - } - ++mixmtx; - enabled >>= 1; - } - } - else - { - ALfloat (*mixmtx)[MAX_AMBI_CHANNELS]{mMatrix.Single}; - ALuint enabled{mEnabled}; - for(FloatBufferLine &outbuf : OutBuffer) - { - if LIKELY(enabled&1) - MixRowSamples({outbuf.data(), SamplesToDo}, {*mixmtx, mNumChannels}, - InSamples->data(), InSamples->size()); - ++mixmtx; - enabled >>= 1; - } - } -} - - -std::array<ALfloat,MAX_AMBI_ORDER+1> BFormatDec::GetHFOrderScales(const ALuint in_order, const ALuint out_order) noexcept -{ - std::array<ALfloat,MAX_AMBI_ORDER+1> ret{}; - - assert(out_order >= in_order); - - const ALfloat (&target)[MAX_AMBI_ORDER+1] = GetDecoderHFScales(out_order); - const ALfloat (&input)[MAX_AMBI_ORDER+1] = GetDecoderHFScales(in_order); - - for(ALuint i{0};i < in_order+1;++i) - ret[i] = input[i] / target[i]; - - return ret; -} |