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-rw-r--r--Alc/bformatdec.c492
1 files changed, 0 insertions, 492 deletions
diff --git a/Alc/bformatdec.c b/Alc/bformatdec.c
deleted file mode 100644
index 5233d06f..00000000
--- a/Alc/bformatdec.c
+++ /dev/null
@@ -1,492 +0,0 @@
-
-#include "config.h"
-
-#include "bformatdec.h"
-#include "ambdec.h"
-#include "filters/splitter.h"
-#include "alu.h"
-
-#include "bool.h"
-#include "threads.h"
-#include "almalloc.h"
-
-
-/* NOTE: These are scale factors as applied to Ambisonics content. Decoder
- * coefficients should be divided by these values to get proper N3D scalings.
- */
-const ALfloat N3D2N3DScale[MAX_AMBI_COEFFS] = {
- 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f,
- 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f
-};
-const ALfloat SN3D2N3DScale[MAX_AMBI_COEFFS] = {
- 1.000000000f, /* ACN 0 (W), sqrt(1) */
- 1.732050808f, /* ACN 1 (Y), sqrt(3) */
- 1.732050808f, /* ACN 2 (Z), sqrt(3) */
- 1.732050808f, /* ACN 3 (X), sqrt(3) */
- 2.236067978f, /* ACN 4 (V), sqrt(5) */
- 2.236067978f, /* ACN 5 (T), sqrt(5) */
- 2.236067978f, /* ACN 6 (R), sqrt(5) */
- 2.236067978f, /* ACN 7 (S), sqrt(5) */
- 2.236067978f, /* ACN 8 (U), sqrt(5) */
- 2.645751311f, /* ACN 9 (Q), sqrt(7) */
- 2.645751311f, /* ACN 10 (O), sqrt(7) */
- 2.645751311f, /* ACN 11 (M), sqrt(7) */
- 2.645751311f, /* ACN 12 (K), sqrt(7) */
- 2.645751311f, /* ACN 13 (L), sqrt(7) */
- 2.645751311f, /* ACN 14 (N), sqrt(7) */
- 2.645751311f, /* ACN 15 (P), sqrt(7) */
-};
-const ALfloat FuMa2N3DScale[MAX_AMBI_COEFFS] = {
- 1.414213562f, /* ACN 0 (W), sqrt(2) */
- 1.732050808f, /* ACN 1 (Y), sqrt(3) */
- 1.732050808f, /* ACN 2 (Z), sqrt(3) */
- 1.732050808f, /* ACN 3 (X), sqrt(3) */
- 1.936491673f, /* ACN 4 (V), sqrt(15)/2 */
- 1.936491673f, /* ACN 5 (T), sqrt(15)/2 */
- 2.236067978f, /* ACN 6 (R), sqrt(5) */
- 1.936491673f, /* ACN 7 (S), sqrt(15)/2 */
- 1.936491673f, /* ACN 8 (U), sqrt(15)/2 */
- 2.091650066f, /* ACN 9 (Q), sqrt(35/8) */
- 1.972026594f, /* ACN 10 (O), sqrt(35)/3 */
- 2.231093404f, /* ACN 11 (M), sqrt(224/45) */
- 2.645751311f, /* ACN 12 (K), sqrt(7) */
- 2.231093404f, /* ACN 13 (L), sqrt(224/45) */
- 1.972026594f, /* ACN 14 (N), sqrt(35)/3 */
- 2.091650066f, /* ACN 15 (P), sqrt(35/8) */
-};
-
-
-#define HF_BAND 0
-#define LF_BAND 1
-#define NUM_BANDS 2
-
-/* These points are in AL coordinates! */
-static const ALfloat Ambi3DPoints[8][3] = {
- { -0.577350269f, 0.577350269f, -0.577350269f },
- { 0.577350269f, 0.577350269f, -0.577350269f },
- { -0.577350269f, 0.577350269f, 0.577350269f },
- { 0.577350269f, 0.577350269f, 0.577350269f },
- { -0.577350269f, -0.577350269f, -0.577350269f },
- { 0.577350269f, -0.577350269f, -0.577350269f },
- { -0.577350269f, -0.577350269f, 0.577350269f },
- { 0.577350269f, -0.577350269f, 0.577350269f },
-};
-static const ALfloat Ambi3DDecoder[8][MAX_AMBI_COEFFS] = {
- { 0.125f, 0.125f, 0.125f, 0.125f },
- { 0.125f, -0.125f, 0.125f, 0.125f },
- { 0.125f, 0.125f, 0.125f, -0.125f },
- { 0.125f, -0.125f, 0.125f, -0.125f },
- { 0.125f, 0.125f, -0.125f, 0.125f },
- { 0.125f, -0.125f, -0.125f, 0.125f },
- { 0.125f, 0.125f, -0.125f, -0.125f },
- { 0.125f, -0.125f, -0.125f, -0.125f },
-};
-static const ALfloat Ambi3DDecoderHFScale[MAX_AMBI_COEFFS] = {
- 2.0f,
- 1.15470054f, 1.15470054f, 1.15470054f
-};
-
-
-/* NOTE: BandSplitter filters are unused with single-band decoding */
-typedef struct BFormatDec {
- ALuint Enabled; /* Bitfield of enabled channels. */
-
- union {
- alignas(16) ALfloat Dual[MAX_OUTPUT_CHANNELS][NUM_BANDS][MAX_AMBI_COEFFS];
- alignas(16) ALfloat Single[MAX_OUTPUT_CHANNELS][MAX_AMBI_COEFFS];
- } Matrix;
-
- BandSplitter XOver[MAX_AMBI_COEFFS];
-
- ALfloat (*Samples)[BUFFERSIZE];
- /* These two alias into Samples */
- ALfloat (*SamplesHF)[BUFFERSIZE];
- ALfloat (*SamplesLF)[BUFFERSIZE];
-
- alignas(16) ALfloat ChannelMix[BUFFERSIZE];
-
- struct {
- BandSplitter XOver;
- ALfloat Gains[NUM_BANDS];
- } UpSampler[4];
-
- ALsizei NumChannels;
- ALboolean DualBand;
-} BFormatDec;
-
-BFormatDec *bformatdec_alloc()
-{
- return al_calloc(16, sizeof(BFormatDec));
-}
-
-void bformatdec_free(BFormatDec **dec)
-{
- if(dec && *dec)
- {
- al_free((*dec)->Samples);
- (*dec)->Samples = NULL;
- (*dec)->SamplesHF = NULL;
- (*dec)->SamplesLF = NULL;
-
- al_free(*dec);
- *dec = NULL;
- }
-}
-
-void bformatdec_reset(BFormatDec *dec, const AmbDecConf *conf, ALsizei chancount, ALuint srate, const ALsizei chanmap[MAX_OUTPUT_CHANNELS])
-{
- static const ALsizei map2DTo3D[MAX_AMBI2D_COEFFS] = {
- 0, 1, 3, 4, 8, 9, 15
- };
- const ALfloat *coeff_scale = N3D2N3DScale;
- bool periphonic;
- ALfloat ratio;
- ALsizei i;
-
- al_free(dec->Samples);
- dec->Samples = NULL;
- dec->SamplesHF = NULL;
- dec->SamplesLF = NULL;
-
- dec->NumChannels = chancount;
- dec->Samples = al_calloc(16, dec->NumChannels*2 * sizeof(dec->Samples[0]));
- dec->SamplesHF = dec->Samples;
- dec->SamplesLF = dec->SamplesHF + dec->NumChannels;
-
- dec->Enabled = 0;
- for(i = 0;i < conf->NumSpeakers;i++)
- dec->Enabled |= 1 << chanmap[i];
-
- if(conf->CoeffScale == ADS_SN3D)
- coeff_scale = SN3D2N3DScale;
- else if(conf->CoeffScale == ADS_FuMa)
- coeff_scale = FuMa2N3DScale;
-
- memset(dec->UpSampler, 0, sizeof(dec->UpSampler));
- ratio = 400.0f / (ALfloat)srate;
- for(i = 0;i < 4;i++)
- bandsplit_init(&dec->UpSampler[i].XOver, ratio);
- if((conf->ChanMask&AMBI_PERIPHONIC_MASK))
- {
- periphonic = true;
-
- dec->UpSampler[0].Gains[HF_BAND] = (conf->ChanMask > 0x1ff) ? W_SCALE_3H3P :
- (conf->ChanMask > 0xf) ? W_SCALE_2H2P : 1.0f;
- dec->UpSampler[0].Gains[LF_BAND] = 1.0f;
- for(i = 1;i < 4;i++)
- {
- dec->UpSampler[i].Gains[HF_BAND] = (conf->ChanMask > 0x1ff) ? XYZ_SCALE_3H3P :
- (conf->ChanMask > 0xf) ? XYZ_SCALE_2H2P : 1.0f;
- dec->UpSampler[i].Gains[LF_BAND] = 1.0f;
- }
- }
- else
- {
- periphonic = false;
-
- dec->UpSampler[0].Gains[HF_BAND] = (conf->ChanMask > 0x1ff) ? W_SCALE_3H0P :
- (conf->ChanMask > 0xf) ? W_SCALE_2H0P : 1.0f;
- dec->UpSampler[0].Gains[LF_BAND] = 1.0f;
- for(i = 1;i < 3;i++)
- {
- dec->UpSampler[i].Gains[HF_BAND] = (conf->ChanMask > 0x1ff) ? XYZ_SCALE_3H0P :
- (conf->ChanMask > 0xf) ? XYZ_SCALE_2H0P : 1.0f;
- dec->UpSampler[i].Gains[LF_BAND] = 1.0f;
- }
- dec->UpSampler[3].Gains[HF_BAND] = 0.0f;
- dec->UpSampler[3].Gains[LF_BAND] = 0.0f;
- }
-
- memset(&dec->Matrix, 0, sizeof(dec->Matrix));
- if(conf->FreqBands == 1)
- {
- dec->DualBand = AL_FALSE;
- for(i = 0;i < conf->NumSpeakers;i++)
- {
- ALsizei chan = chanmap[i];
- ALfloat gain;
- ALsizei j, k;
-
- if(!periphonic)
- {
- for(j = 0,k = 0;j < MAX_AMBI2D_COEFFS;j++)
- {
- ALsizei l = map2DTo3D[j];
- if(j == 0) gain = conf->HFOrderGain[0];
- else if(j == 1) gain = conf->HFOrderGain[1];
- else if(j == 3) gain = conf->HFOrderGain[2];
- else if(j == 5) gain = conf->HFOrderGain[3];
- if((conf->ChanMask&(1<<l)))
- dec->Matrix.Single[chan][j] = conf->HFMatrix[i][k++] / coeff_scale[l] *
- gain;
- }
- }
- else
- {
- for(j = 0,k = 0;j < MAX_AMBI_COEFFS;j++)
- {
- if(j == 0) gain = conf->HFOrderGain[0];
- else if(j == 1) gain = conf->HFOrderGain[1];
- else if(j == 4) gain = conf->HFOrderGain[2];
- else if(j == 9) gain = conf->HFOrderGain[3];
- if((conf->ChanMask&(1<<j)))
- dec->Matrix.Single[chan][j] = conf->HFMatrix[i][k++] / coeff_scale[j] *
- gain;
- }
- }
- }
- }
- else
- {
- dec->DualBand = AL_TRUE;
-
- ratio = conf->XOverFreq / (ALfloat)srate;
- for(i = 0;i < MAX_AMBI_COEFFS;i++)
- bandsplit_init(&dec->XOver[i], ratio);
-
- ratio = powf(10.0f, conf->XOverRatio / 40.0f);
- for(i = 0;i < conf->NumSpeakers;i++)
- {
- ALsizei chan = chanmap[i];
- ALfloat gain;
- ALsizei j, k;
-
- if(!periphonic)
- {
- for(j = 0,k = 0;j < MAX_AMBI2D_COEFFS;j++)
- {
- ALsizei l = map2DTo3D[j];
- if(j == 0) gain = conf->HFOrderGain[0] * ratio;
- else if(j == 1) gain = conf->HFOrderGain[1] * ratio;
- else if(j == 3) gain = conf->HFOrderGain[2] * ratio;
- else if(j == 5) gain = conf->HFOrderGain[3] * ratio;
- if((conf->ChanMask&(1<<l)))
- dec->Matrix.Dual[chan][HF_BAND][j] = conf->HFMatrix[i][k++] /
- coeff_scale[l] * gain;
- }
- for(j = 0,k = 0;j < MAX_AMBI2D_COEFFS;j++)
- {
- ALsizei l = map2DTo3D[j];
- if(j == 0) gain = conf->LFOrderGain[0] / ratio;
- else if(j == 1) gain = conf->LFOrderGain[1] / ratio;
- else if(j == 3) gain = conf->LFOrderGain[2] / ratio;
- else if(j == 5) gain = conf->LFOrderGain[3] / ratio;
- if((conf->ChanMask&(1<<l)))
- dec->Matrix.Dual[chan][LF_BAND][j] = conf->LFMatrix[i][k++] /
- coeff_scale[l] * gain;
- }
- }
- else
- {
- for(j = 0,k = 0;j < MAX_AMBI_COEFFS;j++)
- {
- if(j == 0) gain = conf->HFOrderGain[0] * ratio;
- else if(j == 1) gain = conf->HFOrderGain[1] * ratio;
- else if(j == 4) gain = conf->HFOrderGain[2] * ratio;
- else if(j == 9) gain = conf->HFOrderGain[3] * ratio;
- if((conf->ChanMask&(1<<j)))
- dec->Matrix.Dual[chan][HF_BAND][j] = conf->HFMatrix[i][k++] /
- coeff_scale[j] * gain;
- }
- for(j = 0,k = 0;j < MAX_AMBI_COEFFS;j++)
- {
- if(j == 0) gain = conf->LFOrderGain[0] / ratio;
- else if(j == 1) gain = conf->LFOrderGain[1] / ratio;
- else if(j == 4) gain = conf->LFOrderGain[2] / ratio;
- else if(j == 9) gain = conf->LFOrderGain[3] / ratio;
- if((conf->ChanMask&(1<<j)))
- dec->Matrix.Dual[chan][LF_BAND][j] = conf->LFMatrix[i][k++] /
- coeff_scale[j] * gain;
- }
- }
- }
- }
-}
-
-
-void bformatdec_process(struct BFormatDec *dec, ALfloat (*restrict OutBuffer)[BUFFERSIZE], ALsizei OutChannels, const ALfloat (*restrict InSamples)[BUFFERSIZE], ALsizei SamplesToDo)
-{
- ALsizei chan, i;
-
- OutBuffer = ASSUME_ALIGNED(OutBuffer, 16);
- if(dec->DualBand)
- {
- for(i = 0;i < dec->NumChannels;i++)
- bandsplit_process(&dec->XOver[i], dec->SamplesHF[i], dec->SamplesLF[i],
- InSamples[i], SamplesToDo);
-
- for(chan = 0;chan < OutChannels;chan++)
- {
- if(!(dec->Enabled&(1<<chan)))
- continue;
-
- memset(dec->ChannelMix, 0, SamplesToDo*sizeof(ALfloat));
- MixRowSamples(dec->ChannelMix, dec->Matrix.Dual[chan][HF_BAND],
- dec->SamplesHF, dec->NumChannels, 0, SamplesToDo
- );
- MixRowSamples(dec->ChannelMix, dec->Matrix.Dual[chan][LF_BAND],
- dec->SamplesLF, dec->NumChannels, 0, SamplesToDo
- );
-
- for(i = 0;i < SamplesToDo;i++)
- OutBuffer[chan][i] += dec->ChannelMix[i];
- }
- }
- else
- {
- for(chan = 0;chan < OutChannels;chan++)
- {
- if(!(dec->Enabled&(1<<chan)))
- continue;
-
- memset(dec->ChannelMix, 0, SamplesToDo*sizeof(ALfloat));
- MixRowSamples(dec->ChannelMix, dec->Matrix.Single[chan], InSamples,
- dec->NumChannels, 0, SamplesToDo);
-
- for(i = 0;i < SamplesToDo;i++)
- OutBuffer[chan][i] += dec->ChannelMix[i];
- }
- }
-}
-
-
-void bformatdec_upSample(struct BFormatDec *dec, ALfloat (*restrict OutBuffer)[BUFFERSIZE], const ALfloat (*restrict InSamples)[BUFFERSIZE], ALsizei InChannels, ALsizei SamplesToDo)
-{
- ALsizei i;
-
- /* This up-sampler leverages the differences observed in dual-band second-
- * and third-order decoder matrices compared to first-order. For the same
- * output channel configuration, the low-frequency matrix has identical
- * coefficients in the shared input channels, while the high-frequency
- * matrix has extra scalars applied to the W channel and X/Y/Z channels.
- * Mixing the first-order content into the higher-order stream with the
- * appropriate counter-scales applied to the HF response results in the
- * subsequent higher-order decode generating the same response as a first-
- * order decode.
- */
- for(i = 0;i < InChannels;i++)
- {
- /* First, split the first-order components into low and high frequency
- * bands.
- */
- bandsplit_process(&dec->UpSampler[i].XOver,
- dec->Samples[HF_BAND], dec->Samples[LF_BAND],
- InSamples[i], SamplesToDo
- );
-
- /* Now write each band to the output. */
- MixRowSamples(OutBuffer[i], dec->UpSampler[i].Gains,
- dec->Samples, NUM_BANDS, 0, SamplesToDo
- );
- }
-}
-
-
-#define INVALID_UPSAMPLE_INDEX INT_MAX
-
-static ALsizei GetACNIndex(const BFChannelConfig *chans, ALsizei numchans, ALsizei acn)
-{
- ALsizei i;
- for(i = 0;i < numchans;i++)
- {
- if(chans[i].Index == acn)
- return i;
- }
- return INVALID_UPSAMPLE_INDEX;
-}
-#define GetChannelForACN(b, a) GetACNIndex((b).Ambi.Map, (b).NumChannels, (a))
-
-typedef struct AmbiUpsampler {
- alignas(16) ALfloat Samples[NUM_BANDS][BUFFERSIZE];
-
- BandSplitter XOver[4];
-
- ALfloat Gains[4][MAX_OUTPUT_CHANNELS][NUM_BANDS];
-} AmbiUpsampler;
-
-AmbiUpsampler *ambiup_alloc()
-{
- return al_calloc(16, sizeof(AmbiUpsampler));
-}
-
-void ambiup_free(struct AmbiUpsampler **ambiup)
-{
- if(ambiup)
- {
- al_free(*ambiup);
- *ambiup = NULL;
- }
-}
-
-void ambiup_reset(struct AmbiUpsampler *ambiup, const ALCdevice *device, ALfloat w_scale, ALfloat xyz_scale)
-{
- ALfloat ratio;
- ALsizei i;
-
- ratio = 400.0f / (ALfloat)device->Frequency;
- for(i = 0;i < 4;i++)
- bandsplit_init(&ambiup->XOver[i], ratio);
-
- memset(ambiup->Gains, 0, sizeof(ambiup->Gains));
- if(device->Dry.CoeffCount > 0)
- {
- ALfloat encgains[8][MAX_OUTPUT_CHANNELS];
- ALsizei j;
- size_t k;
-
- for(k = 0;k < COUNTOF(Ambi3DPoints);k++)
- {
- ALfloat coeffs[MAX_AMBI_COEFFS] = { 0.0f };
- CalcDirectionCoeffs(Ambi3DPoints[k], 0.0f, coeffs);
- ComputePanGains(&device->Dry, coeffs, 1.0f, encgains[k]);
- }
-
- /* Combine the matrices that do the in->virt and virt->out conversions
- * so we get a single in->out conversion. NOTE: the Encoder matrix
- * (encgains) and output are transposed, so the input channels line up
- * with the rows and the output channels line up with the columns.
- */
- for(i = 0;i < 4;i++)
- {
- for(j = 0;j < device->Dry.NumChannels;j++)
- {
- ALdouble gain = 0.0;
- for(k = 0;k < COUNTOF(Ambi3DDecoder);k++)
- gain += (ALdouble)Ambi3DDecoder[k][i] * encgains[k][j];
- ambiup->Gains[i][j][HF_BAND] = (ALfloat)(gain * Ambi3DDecoderHFScale[i]);
- ambiup->Gains[i][j][LF_BAND] = (ALfloat)gain;
- }
- }
- }
- else
- {
- for(i = 0;i < 4;i++)
- {
- ALsizei index = GetChannelForACN(device->Dry, i);
- if(index != INVALID_UPSAMPLE_INDEX)
- {
- ALfloat scale = device->Dry.Ambi.Map[index].Scale;
- ambiup->Gains[i][index][HF_BAND] = scale * ((i==0) ? w_scale : xyz_scale);
- ambiup->Gains[i][index][LF_BAND] = scale;
- }
- }
- }
-}
-
-void ambiup_process(struct AmbiUpsampler *ambiup, ALfloat (*restrict OutBuffer)[BUFFERSIZE], ALsizei OutChannels, const ALfloat (*restrict InSamples)[BUFFERSIZE], ALsizei SamplesToDo)
-{
- ALsizei i, j;
-
- for(i = 0;i < 4;i++)
- {
- bandsplit_process(&ambiup->XOver[i],
- ambiup->Samples[HF_BAND], ambiup->Samples[LF_BAND],
- InSamples[i], SamplesToDo
- );
-
- for(j = 0;j < OutChannels;j++)
- MixRowSamples(OutBuffer[j], ambiup->Gains[i][j],
- ambiup->Samples, NUM_BANDS, 0, SamplesToDo
- );
- }
-}
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