diff options
Diffstat (limited to 'Src/Plugins/Input/in_vorbis/shaper.cpp')
| -rw-r--r-- | Src/Plugins/Input/in_vorbis/shaper.cpp | 245 |
1 files changed, 0 insertions, 245 deletions
diff --git a/Src/Plugins/Input/in_vorbis/shaper.cpp b/Src/Plugins/Input/in_vorbis/shaper.cpp deleted file mode 100644 index 85779a879..000000000 --- a/Src/Plugins/Input/in_vorbis/shaper.cpp +++ /dev/null @@ -1,245 +0,0 @@ -#include "Shaper.h" - -#ifndef M_PI -#define M_PI 3.1415926535897932384626433832795028842 -#endif - -#define RANDBUFLEN 65536 - -#define RINT(x) ((x) >= 0 ? ((int)((x) + 0.5)) : ((int)((x) - 0.5))) - -const int scoeffreq[] = - { - 0, 48000, 44100, 37800, 32000, 22050, 48000, 44100 - }; - - -const int scoeflen[] = - { - 1, 16, 20, 16, 16, 15, 16, 15 - }; - -const int samp[] = - { - 8, 18, 27, 8, 8, 8, 10, 9 - }; - -const double shapercoefs[8][21] = - { - { - -1 - } - , /* triangular dither */ - - { -2.8720729351043701172, 5.0413231849670410156, -6.2442994117736816406, 5.8483986854553222656, - -3.7067542076110839844, 1.0495119094848632812, 1.1830236911773681641, -2.1126792430877685547, - 1.9094531536102294922, -0.99913084506988525391, 0.17090806365013122559, 0.32615602016448974609, - -0.39127644896507263184, 0.26876461505889892578, -0.097676105797290802002, 0.023473845794796943665, - }, /* 48k, N=16, amp=18 */ - - { -2.6773197650909423828, 4.8308925628662109375, -6.570110321044921875, 7.4572014808654785156, - -6.7263274192810058594, 4.8481650352478027344, -2.0412089824676513672, -0.7006359100341796875, - 2.9537565708160400391, -4.0800385475158691406, 4.1845216751098632812, -3.3311812877655029297, - 2.1179926395416259766, -0.879302978515625, 0.031759146600961685181, 0.42382788658142089844, - -0.47882103919982910156, 0.35490813851356506348, -0.17496839165687561035, 0.060908168554306030273, - }, /* 44.1k, N=20, amp=27 */ - - { -1.6335992813110351562, 2.2615492343902587891, -2.4077029228210449219, 2.6341717243194580078, - -2.1440362930297851562, 1.8153258562088012695, -1.0816224813461303711, 0.70302653312683105469, - -0.15991993248462677002, -0.041549518704414367676, 0.29416576027870178223, -0.2518316805362701416, - 0.27766478061676025391, -0.15785403549671173096, 0.10165894031524658203, -0.016833892092108726501, - }, /* 37.8k, N=16 */ - - { -0.82901298999786376953, 0.98922657966613769531, -0.59825712442398071289, 1.0028809309005737305, - -0.59938216209411621094, 0.79502451419830322266, -0.42723315954208374023, 0.54492527246475219727, - -0.30792605876922607422, 0.36871799826622009277, -0.18792048096656799316, 0.2261127084493637085, - -0.10573341697454452515, 0.11435490846633911133, -0.038800679147243499756, 0.040842197835445404053, - }, /* 32k, N=16 */ - - { -0.065229974687099456787, 0.54981261491775512695, 0.40278548002243041992, 0.31783768534660339355, - 0.28201797604560852051, 0.16985194385051727295, 0.15433363616466522217, 0.12507140636444091797, - 0.08903945237398147583, 0.064410120248794555664, 0.047146003693342208862, 0.032805237919092178345, - 0.028495194390416145325, 0.011695005930960178375, 0.011831838637590408325, - }, /* 22.05k, N=15 */ - - { -2.3925774097442626953, 3.4350297451019287109, -3.1853709220886230469, 1.8117271661758422852, - 0.20124770700931549072, -1.4759907722473144531, 1.7210904359817504883, -0.97746700048446655273, - 0.13790138065814971924, 0.38185903429985046387, -0.27421241998672485352, -0.066584214568138122559, - 0.35223302245140075684, -0.37672343850135803223, 0.23964276909828186035, -0.068674825131893157959, - }, /* 48k, N=16, amp=10 */ - - { -2.0833916664123535156, 3.0418450832366943359, -3.2047898769378662109, 2.7571926116943359375, - -1.4978630542755126953, 0.3427594602108001709, 0.71733748912811279297, -1.0737057924270629883, - 1.0225815773010253906, -0.56649994850158691406, 0.20968692004680633545, 0.065378531813621520996, - -0.10322438180446624756, 0.067442022264003753662, 0.00495197344571352005, - }, /* 44.1k, N=15, amp=9 */ - -#if 0 - { -3.0259189605712890625, 6.0268716812133789062, -9.195003509521484375, 11.824929237365722656, - -12.767142295837402344, 11.917946815490722656, -9.1739168167114257812, 5.3712320327758789062, - -1.1393624544143676758, -2.4484779834747314453, 4.9719839096069335938, -6.0392003059387207031, - 5.9359521865844726562, -4.903278350830078125, 3.5527443885803222656, -2.1909697055816650391, - 1.1672389507293701172, -0.4903914332389831543, 0.16519790887832641602, -0.023217858746647834778, - }, /* 44.1k, N=20 */ -#endif - }; - -#define POOLSIZE 97 - -Shaper::Shaper(int freq, int _nch, int min, int max, int _dtype, int pdf, double noiseamp) -{ - int i; - float pool[POOLSIZE] = {0}; - - nch = _nch; - dtype = _dtype; - - for (i = 1;i < 6;i++) if (freq == scoeffreq[i]) break; - /* if ((dtype == 3 || dtype == 4) && i == 6) { - fprintf(stderr,"Warning: ATH based noise shaping for destination frequency %dHz is not available, using triangular dither\n",freq); - }*/ - if (dtype == 2 || i == 6) i = 0; - if (dtype == 4 && (i == 1 || i == 2)) i += 5; - - shaper_type = i; - - shapebuf = (double**)malloc(sizeof(double *) * nch); - shaper_len = scoeflen[shaper_type]; - - for (i = 0;i < nch;i++) - shapebuf[i] = (double*)calloc(shaper_len, sizeof(double)); - - shaper_clipmin = min; - shaper_clipmax = max; - - randbuf = (REAL*)malloc(sizeof(REAL) * RANDBUFLEN); - - for (i = 0;i < POOLSIZE;i++) pool[i] = warandf(); - - switch (pdf) - { - case DITHER_RECTANGLE: // rectangular - for (i = 0;i < RANDBUFLEN;i++) - { - float r; - int p; - - p = warand() % POOLSIZE; - r = pool[p]; pool[p] = warandf(); - randbuf[i] = (REAL)(noiseamp * (((double)r) - 0.5)); - } - break; - - case DITHER_TRIANGLE: - for (i = 0;i < RANDBUFLEN;i++) - { - float r1, r2; - int p; - - p = warand() % POOLSIZE; - r1 = pool[p]; pool[p] = warandf(); - p = warand() % POOLSIZE; - r2 = pool[p]; pool[p] = warandf(); - randbuf[i] = (REAL)(noiseamp * ((((double)r1)) - (((double)r2)))); - } - break; -#if 0 - case DITHER_GAUSSIAN: // gaussian - for (i = 0;i < RANDBUFLEN;i++) - { - int sw = 0; - double t, u; - double r; - int p; - - if (sw == 0) - { - sw = 1; - - p = warand() % POOLSIZE; - r = ((double)pool[p]); pool[p] = warandf(); - - t = sqrt(-2 * log(1 - r)); - - p = warand() % POOLSIZE; - r = ((double)pool[p]); pool[p] = warandf(); - - u = 2 * M_PI * r; - - randbuf[i] = noiseamp * t * cos(u); - } - else - { - sw = 0; - - randbuf[i] = noiseamp * t * sin(u); - } - } - break; -#endif - } - - randptr = 0; - -// if (dtype == 0 || dtype == 1) return 1; - //return samp[shaper_type]; -} - -Shaper::~Shaper() -{ - int i; - - for (i = 0;i < nch;i++) free(shapebuf[i]); - free(shapebuf); - free(randbuf); -} - -int Shaper::do_shaping(double s,/*double *peak,*/int ch) -{ - double u, h; - int i; - - if (dtype == 1) - { - s += randbuf[randptr++ & (RANDBUFLEN-1)]; - - if (s < shaper_clipmin) - { - //double d = (double)s / shaper_clipmin; - //*peak = *peak < d ? d : *peak; - s = shaper_clipmin; - } - if (s > shaper_clipmax) - { - //double d = (double)s / shaper_clipmax; - //*peak = *peak < d ? d : *peak; - s = shaper_clipmax; - } - - return RINT(s); - } - - h = 0; - for (i = 0;i < shaper_len;i++) - h += shapercoefs[shaper_type][i] * shapebuf[ch][i]; - s += h; - u = s; - s += randbuf[randptr++ & (RANDBUFLEN-1)]; - if (s < shaper_clipmin) - { - //double d = (double)s / shaper_clipmin; - //*peak = *peak < d ? d : *peak; - s = shaper_clipmin; - } - if (s > shaper_clipmax) - { - //double d = (double)s / shaper_clipmax; - //*peak = *peak < d ? d : *peak; - s = shaper_clipmax; - } - s = RINT(s); - for (i = shaper_len - 2;i >= 0;i--) shapebuf[ch][i+1] = shapebuf[ch][i]; - shapebuf[ch][0] = s - u; - - return (int)s; -}
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