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author | Miguel Freitas <miguelfreitas@users.sourceforge.net> | 2003-12-30 02:00:10 +0000 |
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committer | Miguel Freitas <miguelfreitas@users.sourceforge.net> | 2003-12-30 02:00:10 +0000 |
commit | f260c2ac3661143bfdfbcc4c7a3574acdd831894 (patch) | |
tree | 644ed0104c63c64b7346681ca5e212a81876458c /src/libfaad/dither.c | |
parent | 33f6c0d77b5dfafcbafd09fc05d700fb66c9cb47 (diff) | |
download | xine-lib-f260c2ac3661143bfdfbcc4c7a3574acdd831894.tar.gz xine-lib-f260c2ac3661143bfdfbcc4c7a3574acdd831894.tar.bz2 |
- update to libfaad 2.0 rc3
- some fixes to xine_decoder.c
CVS patchset: 5959
CVS date: 2003/12/30 02:00:10
Diffstat (limited to 'src/libfaad/dither.c')
-rw-r--r-- | src/libfaad/dither.c | 132 |
1 files changed, 0 insertions, 132 deletions
diff --git a/src/libfaad/dither.c b/src/libfaad/dither.c deleted file mode 100644 index 9c29e189a..000000000 --- a/src/libfaad/dither.c +++ /dev/null @@ -1,132 +0,0 @@ -/* This program is licensed under the GNU Library General Public License, version 2, - * a copy of which is included with this program (with filename LICENSE.LGPL). - * - * (c) 2002 John Edwards - * mostly lifted from work by Frank Klemm - * random functions for dithering. - * - * last modified: - * $Id: dither.c,v 1.1 2002/12/16 18:59:59 miguelfreitas Exp $ - */ -#include "common.h" - -#ifndef FIXED_POINT - -#include <string.h> -#include "dither.h" -#include "common.h" - - -double -Random_Equi ( double mult ) // gives a equal distributed random number -{ // between -2^31*mult and +2^31*mult - return mult * (int) random_int (); -} - -double -Random_Triangular ( double mult ) // gives a triangular distributed random number -{ // between -2^32*mult and +2^32*mult - return mult * ( (double) (int) random_int () + (double) (int) random_int () ); -} - -/*********************************************************************************************************************/ - -static const float32_t F44_0 [16 + 32] = { - (float)0, (float)0, (float)0, (float)0, (float)0, (float)0, (float)0, (float)0, - (float)0, (float)0, (float)0, (float)0, (float)0, (float)0, (float)0, (float)0, - - (float)0, (float)0, (float)0, (float)0, (float)0, (float)0, (float)0, (float)0, - (float)0, (float)0, (float)0, (float)0, (float)0, (float)0, (float)0, (float)0, - - (float)0, (float)0, (float)0, (float)0, (float)0, (float)0, (float)0, (float)0, - (float)0, (float)0, (float)0, (float)0, (float)0, (float)0, (float)0, (float)0 -}; - - -static const float32_t F44_1 [16 + 32] = { /* SNR(w) = 4.843163 dB, SNR = -3.192134 dB */ - (float) 0.85018292704024355931, (float) 0.29089597350995344721, (float)-0.05021866022121039450, (float)-0.23545456294599161833, - (float)-0.58362726442227032096, (float)-0.67038978965193036429, (float)-0.38566861572833459221, (float)-0.15218663390367969967, - (float)-0.02577543084864530676, (float) 0.14119295297688728127, (float) 0.22398848581628781612, (float) 0.15401727203382084116, - (float) 0.05216161232906000929, (float)-0.00282237820999675451, (float)-0.03042794608323867363, (float)-0.03109780942998826024, - - (float) 0.85018292704024355931, (float) 0.29089597350995344721, (float)-0.05021866022121039450, (float)-0.23545456294599161833, - (float)-0.58362726442227032096, (float)-0.67038978965193036429, (float)-0.38566861572833459221, (float)-0.15218663390367969967, - (float)-0.02577543084864530676, (float) 0.14119295297688728127, (float) 0.22398848581628781612, (float) 0.15401727203382084116, - (float) 0.05216161232906000929, (float)-0.00282237820999675451, (float)-0.03042794608323867363, (float)-0.03109780942998826024, - - (float) 0.85018292704024355931, (float) 0.29089597350995344721, (float)-0.05021866022121039450, (float)-0.23545456294599161833, - (float)-0.58362726442227032096, (float)-0.67038978965193036429, (float)-0.38566861572833459221, (float)-0.15218663390367969967, - (float)-0.02577543084864530676, (float) 0.14119295297688728127, (float) 0.22398848581628781612, (float) 0.15401727203382084116, - (float) 0.05216161232906000929, (float)-0.00282237820999675451, (float)-0.03042794608323867363, (float)-0.03109780942998826024, -}; - - -static const float32_t F44_2 [16 + 32] = { /* SNR(w) = 10.060213 dB, SNR = -12.766730 dB */ - (float) 1.78827593892108555290, (float) 0.95508210637394326553, (float)-0.18447626783899924429, (float)-0.44198126506275016437, - (float)-0.88404052492547413497, (float)-1.42218907262407452967, (float)-1.02037566838362314995, (float)-0.34861755756425577264, - (float)-0.11490230170431934434, (float) 0.12498899339968611803, (float) 0.38065885268563131927, (float) 0.31883491321310506562, - (float) 0.10486838686563442765, (float)-0.03105361685110374845, (float)-0.06450524884075370758, (float)-0.02939198261121969816, - - (float) 1.78827593892108555290, (float) 0.95508210637394326553, (float)-0.18447626783899924429, (float)-0.44198126506275016437, - (float)-0.88404052492547413497, (float)-1.42218907262407452967, (float)-1.02037566838362314995, (float)-0.34861755756425577264, - (float)-0.11490230170431934434, (float) 0.12498899339968611803, (float) 0.38065885268563131927, (float) 0.31883491321310506562, - (float) 0.10486838686563442765, (float)-0.03105361685110374845, (float)-0.06450524884075370758, (float)-0.02939198261121969816, - - (float) 1.78827593892108555290, (float) 0.95508210637394326553, (float)-0.18447626783899924429, (float)-0.44198126506275016437, - (float)-0.88404052492547413497, (float)-1.42218907262407452967, (float)-1.02037566838362314995, (float)-0.34861755756425577264, - (float)-0.11490230170431934434, (float) 0.12498899339968611803, (float) 0.38065885268563131927, (float) 0.31883491321310506562, - (float) 0.10486838686563442765, (float)-0.03105361685110374845, (float)-0.06450524884075370758, (float)-0.02939198261121969816, -}; - - -static const float32_t F44_3 [16 + 32] = { /* SNR(w) = 15.382598 dB, SNR = -29.402334 dB */ - (float) 2.89072132015058161445, (float) 2.68932810943698754106, (float) 0.21083359339410251227, (float)-0.98385073324997617515, - (float)-1.11047823227097316719, (float)-2.18954076314139673147, (float)-2.36498032881953056225, (float)-0.95484132880101140785, - (float)-0.23924057925542965158, (float)-0.13865235703915925642, (float) 0.43587843191057992846, (float) 0.65903257226026665927, - (float) 0.24361815372443152787, (float)-0.00235974960154720097, (float) 0.01844166574603346289, (float) 0.01722945988740875099, - - (float) 2.89072132015058161445, (float) 2.68932810943698754106, (float) 0.21083359339410251227, (float)-0.98385073324997617515, - (float)-1.11047823227097316719, (float)-2.18954076314139673147, (float)-2.36498032881953056225, (float)-0.95484132880101140785, - (float)-0.23924057925542965158, (float)-0.13865235703915925642, (float) 0.43587843191057992846, (float) 0.65903257226026665927, - (float) 0.24361815372443152787, (float)-0.00235974960154720097, (float) 0.01844166574603346289, (float) 0.01722945988740875099, - - (float) 2.89072132015058161445, (float) 2.68932810943698754106, (float) 0.21083359339410251227, (float)-0.98385073324997617515, - (float)-1.11047823227097316719, (float)-2.18954076314139673147, (float)-2.36498032881953056225, (float)-0.95484132880101140785, - (float)-0.23924057925542965158, (float)-0.13865235703915925642, (float) 0.43587843191057992846, (float) 0.65903257226026665927, - (float) 0.24361815372443152787, (float)-0.00235974960154720097, (float) 0.01844166574603346289, (float) 0.01722945988740875099 -}; - - -double -scalar16 ( const float32_t* x, const float32_t* y ) -{ - return x[ 0]*y[ 0] + x[ 1]*y[ 1] + x[ 2]*y[ 2] + x[ 3]*y[ 3] - + x[ 4]*y[ 4] + x[ 5]*y[ 5] + x[ 6]*y[ 6] + x[ 7]*y[ 7] - + x[ 8]*y[ 8] + x[ 9]*y[ 9] + x[10]*y[10] + x[11]*y[11] - + x[12]*y[12] + x[13]*y[13] + x[14]*y[14] + x[15]*y[15]; -} - - -void -Init_Dither ( unsigned char bits, unsigned char shapingtype ) -{ - static uint8_t default_dither [] = { 92, 92, 88, 84, 81, 78, 74, 67, 0, 0 }; - static const float32_t* F [] = { F44_0, F44_1, F44_2, F44_3 }; - uint8_t index; - - if (shapingtype < 0) shapingtype = 0; - if (shapingtype > 3) shapingtype = 3; - index = bits - 11 - shapingtype; - if (index < 0) index = 0; - if (index > 9) index = 9; - - memset ( Dither.ErrorHistory , 0, sizeof (Dither.ErrorHistory ) ); - memset ( Dither.DitherHistory, 0, sizeof (Dither.DitherHistory) ); - - Dither.FilterCoeff = F [shapingtype]; - Dither.Mask = ((uint64_t)-1) << (32 - bits); - Dither.Add = 0.5 * ((1L << (32 - bits)) - 1); - Dither.Dither = 0.01*default_dither[index] / (((int64_t)1) << bits); -} - -#endif |