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author | Klaus Schmidinger <kls (at) cadsoft (dot) de> | 2002-02-24 18:00:00 +0100 |
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committer | Klaus Schmidinger <kls (at) cadsoft (dot) de> | 2002-02-24 18:00:00 +0100 |
commit | fb8e7fa302ef8a73feb6958b0cb32cc54f76e677 (patch) | |
tree | 74cf9dd5cd1892aaf1c05db32796eb356d7bc860 /ac3dec/coeff.c | |
parent | a1da0e5c5de55009716e2c327dda16c61c1dae83 (diff) | |
download | vdr-patch-lnbsharing-fb8e7fa302ef8a73feb6958b0cb32cc54f76e677.tar.gz vdr-patch-lnbsharing-fb8e7fa302ef8a73feb6958b0cb32cc54f76e677.tar.bz2 |
Version 1.0.0pre1vdr-1.0.0pre1
- Added scanning for EPG data for another 4 days on channels that support this
(thanks to Oleg Assovski).
- Removed '#define VFAT 1' from recording.c (was a leftover from testing).
- Fixed the "Low disk space!" message (thanks to Sergei Haller).
- Added the TPID to Hessen-3 in 'channels.conf' (thanks to Sergei Haller).
- Fixed a crash when replaying with DEBUG_OSD=1 (thanks to Stefan Huelswitt).
- Implemented the "First day" parameter for repeating timers. See FORMATS for
information about the enhanced 'timers.conf' file format, and MANUAL for
a description of the new item in the "Edit Timer" menu and the enhanced
functionality of the "Blue" button in the "Timers" menu.
- When deleting a recording that is currently still being recorded, the related
timer will now automatically be terminated. If this is a repeating timer, it
will receive a "First day" setting that skips the timer for this day.
- Fixed closing all unused file descriptors when opening a pipe (thanks to
Werner Fink).
- Instant recordings now take the EPG data from the point in time at 5 minutes
from the start time of the recording. In order for this to work the 'active'
parameter of a timer now uses the second bit to indicate that this is an
"instant" recording (see FORMATS for details).
- Fixed the SVDRP GRAB command in case the video device can't be opened (thanks
to Adrian Stabiszewski).
- At startup the data written into 'epg.data' is now read into the EPG data
structures. In order for this to work, the 'E' record has been extended to
(optionally) contain the 'table ID' (see FORMATS for details).
- The new SVDRP command PUTE can be used to put EPG data into the EPG list.
See FORMATS for details about the required data format.
- Taking the German umlauts 'as is' when compiled with VFAT.
- The new Setup parameter RecordDolbyDigital can be used to generally turn off
recording the Dolby Digital audio channels in case you want to save disk space
or don't have the equipment to replay Dolby Digital audio.
- Reading the 'setup.conf' file no longer terminates in case of an error, but
rather attempts to read the rest of the file.
- Removed DVD support from the core VDR source, since the current version from
Andreas Schultz is already much further developed (DVD menu navigation) and
the concept of "additional players" in VDR is going to change in version 1.1.0,
where a new "plugin" interface shall allow the easy implementation of new
players without having to patch the core VDR source. Until then, Andreas has
agreed to provide his DVD support as a completely external patch.
- The contents of the distribution archive now contains the directory name with
the current version number, as in 'vdr-1.0.0pre1/...' in order to avoid
inadvertently overwriting an existing VDR directory with a new version.
- Added a missing error message in SVDRP command LSTC in case the given channel
can't be found.
Diffstat (limited to 'ac3dec/coeff.c')
-rw-r--r-- | ac3dec/coeff.c | 431 |
1 files changed, 0 insertions, 431 deletions
diff --git a/ac3dec/coeff.c b/ac3dec/coeff.c deleted file mode 100644 index 7d5579c..0000000 --- a/ac3dec/coeff.c +++ /dev/null @@ -1,431 +0,0 @@ -/* - * coeff.c - * - * Copyright (C) Aaron Holtzman - May 1999 - * - * This file is part of ac3dec, a free Dolby AC-3 stream decoder. - * - * ac3dec is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * ac3dec is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with GNU Make; see the file COPYING. If not, write to - * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. - * - */ - - -#include <stdlib.h> -#include <stdio.h> -#include "ac3.h" -#include "ac3_internal.h" - - -#include "bitstream.h" -#include "dither.h" -#include "coeff.h" - - -// -//Lookup tables of 0.15 two's complement quantization values -// -#define Q0 ((-2 << 15) / 3.0) -#define Q1 (0) -#define Q2 ((2 << 15) / 3.0) - -static const float q_1_0[ 32 ] = -{ - Q0,Q0,Q0,Q0,Q0,Q0,Q0,Q0,Q0, - Q1,Q1,Q1,Q1,Q1,Q1,Q1,Q1,Q1, - Q2,Q2,Q2,Q2,Q2,Q2,Q2,Q2,Q2, - 0,0,0,0,0 -}; - -static const float q_1_1[ 32 ] = -{ - Q0,Q0,Q0,Q1,Q1,Q1,Q2,Q2,Q2, - Q0,Q0,Q0,Q1,Q1,Q1,Q2,Q2,Q2, - Q0,Q0,Q0,Q1,Q1,Q1,Q2,Q2,Q2, - 0,0,0,0,0 -}; - -static const float q_1_2[ 32 ] = -{ - Q0,Q1,Q2,Q0,Q1,Q2,Q0,Q1,Q2, - Q0,Q1,Q2,Q0,Q1,Q2,Q0,Q1,Q2, - Q0,Q1,Q2,Q0,Q1,Q2,Q0,Q1,Q2, - 0,0,0,0,0 -}; - -#undef Q0 -#undef Q1 -#undef Q2 - -#define Q0 ((-4 << 15) / 5.0) -#define Q1 ((-2 << 15) / 5.0) -#define Q2 (0) -#define Q3 ((2 << 15) / 5.0) -#define Q4 ((4 << 15) / 5.0) - -static const float q_2_0[ 128 ] = -{ - Q0,Q0,Q0,Q0,Q0,Q0,Q0,Q0,Q0,Q0,Q0,Q0, - Q0,Q0,Q0,Q0,Q0,Q0,Q0,Q0,Q0,Q0,Q0,Q0,Q0, - Q1,Q1,Q1,Q1,Q1,Q1,Q1,Q1,Q1,Q1,Q1,Q1, - Q1,Q1,Q1,Q1,Q1,Q1,Q1,Q1,Q1,Q1,Q1,Q1,Q1, - Q2,Q2,Q2,Q2,Q2,Q2,Q2,Q2,Q2,Q2,Q2,Q2, - Q2,Q2,Q2,Q2,Q2,Q2,Q2,Q2,Q2,Q2,Q2,Q2,Q2, - Q3,Q3,Q3,Q3,Q3,Q3,Q3,Q3,Q3,Q3,Q3,Q3, - Q3,Q3,Q3,Q3,Q3,Q3,Q3,Q3,Q3,Q3,Q3,Q3,Q3, - Q4,Q4,Q4,Q4,Q4,Q4,Q4,Q4,Q4,Q4,Q4,Q4, - Q4,Q4,Q4,Q4,Q4,Q4,Q4,Q4,Q4,Q4,Q4,Q4,Q4, - 0,0,0 -}; - -static const float q_2_1[ 128 ] = -{ - Q0,Q0,Q0,Q0,Q0,Q1,Q1,Q1,Q1,Q1, - Q2,Q2,Q2,Q2,Q2,Q3,Q3,Q3,Q3,Q3, - Q4,Q4,Q4,Q4,Q4,Q0,Q0,Q0,Q0,Q0, - Q1,Q1,Q1,Q1,Q1,Q2,Q2,Q2,Q2,Q2, - Q3,Q3,Q3,Q3,Q3,Q4,Q4,Q4,Q4,Q4, - Q0,Q0,Q0,Q0,Q0,Q1,Q1,Q1,Q1,Q1, - Q2,Q2,Q2,Q2,Q2,Q3,Q3,Q3,Q3,Q3, - Q4,Q4,Q4,Q4,Q4,Q0,Q0,Q0,Q0,Q0, - Q1,Q1,Q1,Q1,Q1,Q2,Q2,Q2,Q2,Q2, - Q3,Q3,Q3,Q3,Q3,Q4,Q4,Q4,Q4,Q4, - Q0,Q0,Q0,Q0,Q0,Q1,Q1,Q1,Q1,Q1, - Q2,Q2,Q2,Q2,Q2,Q3,Q3,Q3,Q3,Q3, - Q4,Q4,Q4,Q4,Q4,0,0,0 - }; - -static const float q_2_2[ 128 ] = - { - Q0,Q1,Q2,Q3,Q4,Q0,Q1,Q2,Q3,Q4, - Q0,Q1,Q2,Q3,Q4,Q0,Q1,Q2,Q3,Q4, - Q0,Q1,Q2,Q3,Q4,Q0,Q1,Q2,Q3,Q4, - Q0,Q1,Q2,Q3,Q4,Q0,Q1,Q2,Q3,Q4, - Q0,Q1,Q2,Q3,Q4,Q0,Q1,Q2,Q3,Q4, - Q0,Q1,Q2,Q3,Q4,Q0,Q1,Q2,Q3,Q4, - Q0,Q1,Q2,Q3,Q4,Q0,Q1,Q2,Q3,Q4, - Q0,Q1,Q2,Q3,Q4,Q0,Q1,Q2,Q3,Q4, - Q0,Q1,Q2,Q3,Q4,Q0,Q1,Q2,Q3,Q4, - Q0,Q1,Q2,Q3,Q4,Q0,Q1,Q2,Q3,Q4, - Q0,Q1,Q2,Q3,Q4,Q0,Q1,Q2,Q3,Q4, - Q0,Q1,Q2,Q3,Q4,Q0,Q1,Q2,Q3,Q4, - Q0,Q1,Q2,Q3,Q4,0,0,0 -}; - -#undef Q0 -#undef Q1 -#undef Q2 -#undef Q3 -#undef Q4 - -static const float q_3[7] = -{ - (-6 << 15)/7.0, (-4 << 15)/7.0, (-2 << 15)/7.0, 0.0, - ( 2 << 15)/7.0, ( 4 << 15)/7.0, ( 6 << 15)/7.0 -}; - -#define Q0 ((-10 << 15) / 11.0) -#define Q1 ((-8 << 15) / 11.0) -#define Q2 ((-6 << 15) / 11.0) -#define Q3 ((-4 << 15) / 11.0) -#define Q4 ((-2 << 15) / 11.0) -#define Q5 (0) -#define Q6 ((2 << 15) / 11.0) -#define Q7 ((4 << 15) / 11.0) -#define Q8 ((6 << 15) / 11.0) -#define Q9 ((8 << 15) / 11.0) -#define QA ((10 << 15) / 11.0) - -static const float q_4_0[ 128 ] = -{ - Q0, Q0, Q0, Q0, Q0, Q0, Q0, Q0, Q0, Q0, Q0, - Q1, Q1, Q1, Q1, Q1, Q1, Q1, Q1, Q1, Q1, Q1, - Q2, Q2, Q2, Q2, Q2, Q2, Q2, Q2, Q2, Q2, Q2, - Q3, Q3, Q3, Q3, Q3, Q3, Q3, Q3, Q3, Q3, Q3, - Q4, Q4, Q4, Q4, Q4, Q4, Q4, Q4, Q4, Q4, Q4, - Q5, Q5, Q5, Q5, Q5, Q5, Q5, Q5, Q5, Q5, Q5, - Q6, Q6, Q6, Q6, Q6, Q6, Q6, Q6, Q6, Q6, Q6, - Q7, Q7, Q7, Q7, Q7, Q7, Q7, Q7, Q7, Q7, Q7, - Q8, Q8, Q8, Q8, Q8, Q8, Q8, Q8, Q8, Q8, Q8, - Q9, Q9, Q9, Q9, Q9, Q9, Q9, Q9, Q9, Q9, Q9, - QA, QA, QA, QA, QA, QA, QA, QA, QA, QA, QA, - 0, 0, 0, 0, 0, 0, 0 - }; - -static const float q_4_1[ 128 ] = -{ - Q0, Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, QA, - Q0, Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, QA, - Q0, Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, QA, - Q0, Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, QA, - Q0, Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, QA, - Q0, Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, QA, - Q0, Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, QA, - Q0, Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, QA, - Q0, Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, QA, - Q0, Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, QA, - Q0, Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, QA, - 0, 0, 0, 0, 0, 0, 0 -}; - -#undef Q0 -#undef Q1 -#undef Q2 -#undef Q3 -#undef Q4 -#undef Q5 -#undef Q6 -#undef Q7 -#undef Q8 -#undef Q9 -#undef QA - -static const float q_5[15] = -{ - (-14 << 15)/15.0,(-12 << 15)/15.0,(-10 << 15)/15.0, - ( -8 << 15)/15.0,( -6 << 15)/15.0,( -4 << 15)/15.0, - ( -2 << 15)/15.0, 0.0 ,( 2 << 15)/15.0, - ( 4 << 15)/15.0,( 6 << 15)/15.0,( 8 << 15)/15.0, - ( 10 << 15)/15.0,( 12 << 15)/15.0,( 14 << 15)/15.0 -}; - -// -// Scale factors for convert_to_float -// - -static const uint32_t u32_scale_factors[25] = -{ - 0x38000000, //2 ^ -(0 + 15) - 0x37800000, //2 ^ -(1 + 15) - 0x37000000, //2 ^ -(2 + 15) - 0x36800000, //2 ^ -(3 + 15) - 0x36000000, //2 ^ -(4 + 15) - 0x35800000, //2 ^ -(5 + 15) - 0x35000000, //2 ^ -(6 + 15) - 0x34800000, //2 ^ -(7 + 15) - 0x34000000, //2 ^ -(8 + 15) - 0x33800000, //2 ^ -(9 + 15) - 0x33000000, //2 ^ -(10 + 15) - 0x32800000, //2 ^ -(11 + 15) - 0x32000000, //2 ^ -(12 + 15) - 0x31800000, //2 ^ -(13 + 15) - 0x31000000, //2 ^ -(14 + 15) - 0x30800000, //2 ^ -(15 + 15) - 0x30000000, //2 ^ -(16 + 15) - 0x2f800000, //2 ^ -(17 + 15) - 0x2f000000, //2 ^ -(18 + 15) - 0x2e800000, //2 ^ -(19 + 15) - 0x2e000000, //2 ^ -(20 + 15) - 0x2d800000, //2 ^ -(21 + 15) - 0x2d000000, //2 ^ -(22 + 15) - 0x2c800000, //2 ^ -(23 + 15) - 0x2c000000 //2 ^ -(24 + 15) -}; - -static float *scale_factor = (float*)u32_scale_factors; - -//These store the persistent state of the packed mantissas -static float q_1[2]; -static float q_2[2]; -static float q_4[1]; -static int32_t q_1_pointer; -static int32_t q_2_pointer; -static int32_t q_4_pointer; -static float __inline__ -coeff_get_float(uint16_t bap, uint16_t dithflag, uint16_t exp); - -//Conversion from bap to number of bits in the mantissas -//zeros account for cases 0,1,2,4 which are special cased -static uint16_t qnttztab[16] = -{ - 0, 0, 0, 3, - 0, 4, 5, 6, - 7, 8, 9, 10, - 11, 12, 14, 16 -}; - -static void coeff_reset(void); -static float coeff_get_float(uint16_t bap, uint16_t dithflag, uint16_t exp); -static void coeff_uncouple_ch(float samples[],bsi_t *bsi,audblk_t *audblk,uint32_t ch); - -void coeff_unpack(bsi_t *bsi, audblk_t *audblk, stream_samples_t samples) -{ - uint16_t i,j; - uint32_t done_cpl = 0; - - coeff_reset(); - - for(i=0; i< bsi->nfchans; i++) { - for(j=0; j < audblk->endmant[i]; j++) - samples[i][j] = coeff_get_float(audblk->fbw_bap[i][j], audblk->dithflag[i], audblk->fbw_exp[i][j]); - - if(audblk->cplinu && audblk->chincpl[i] && !(done_cpl)) { - // ncplmant is equal to 12 * ncplsubnd - // Don't dither coupling channel until channel - // separation so that interchannel noise is uncorrelated - for(j=audblk->cplstrtmant; j < audblk->cplendmant; j++) - audblk->cpl_flt[j] = coeff_get_float(audblk->cpl_bap[j],0, audblk->cpl_exp[j]); - done_cpl = 1; - } - } - - //uncouple the channel if necessary - if(audblk->cplinu) { - for(i=0; i< bsi->nfchans; i++) { - if(audblk->chincpl[i]) - coeff_uncouple_ch(samples[i],bsi,audblk,i); - } - - } - - if(bsi->lfeon) { - // There are always 7 mantissas for lfe, no dither for lfe - for(j=0; j < 7 ; j++) - samples[5][j] = coeff_get_float(audblk->lfe_bap[j], 0, audblk->lfe_exp[j]); - } -} - - -/** - * Fetch a float from the bitstream - **/ - -static float inline coeff_get_float (uint16_t bap, uint16_t dithflag, uint16_t exp) -{ - uint16_t dummy = 0; - - //If the bap is 0-5 then we have special cases to take care of - switch(bap) { - case 0: - if(dithflag) - return (dither_gen() * scale_factor[exp]); - - return 0.0; - - case 1: - if (q_1_pointer >= 0) - return(q_1[q_1_pointer--] * scale_factor[exp]); - - if ((dummy = bitstream_get (5)) > 26) - goto error; - - q_1[1] = q_1_1[dummy]; - q_1[0] = q_1_2[dummy]; - q_1_pointer = 1; - - return (q_1_0[dummy] * scale_factor[exp]); - - case 2: - if(q_2_pointer >= 0) - return (q_2[q_2_pointer--] * scale_factor[exp]); - - if ((dummy = bitstream_get (7)) > 124) - goto error; - - q_2[1] = q_2_1[dummy]; - q_2[0] = q_2_2[dummy]; - q_2_pointer = 1; - - return (q_2_0[dummy] * scale_factor[exp]); - - case 3: - if ((dummy = bitstream_get (3)) > 6) - goto error; - - return (q_3[dummy] * scale_factor[exp]); - - case 4: - if(q_4_pointer >= 0) - return (q_4[q_4_pointer--] * scale_factor[exp]); - - if ((dummy = bitstream_get (7)) > 120) - goto error; - - q_4[0] = q_4_1[dummy]; - q_4_pointer = 0; - - return (q_4_0[dummy] * scale_factor[exp]); - - case 5: - if ((dummy = bitstream_get (4)) > 14) - goto error; - - return (q_5[dummy] * scale_factor[exp]); - - default: - dummy = bitstream_get(qnttztab[bap]); - dummy <<= 16 - qnttztab[bap]; - return ((int16_t)dummy * scale_factor[exp]); - } - -error: -#ifdef DEBUG - fprintf(stderr,"** Invalid mantissa - skipping frame **\n"); -#endif - HANDLE_ERROR(); -} - - -/** - * Reset the mantissa state - **/ - -static void coeff_reset(void) -{ - q_1_pointer = q_2_pointer = q_4_pointer = -1; -} - - -/** - * Uncouple the coupling channel into a fbw channel - **/ - -static void coeff_uncouple_ch (float samples[],bsi_t *bsi,audblk_t *audblk,uint32_t ch) -{ - uint32_t bnd = 0; - uint32_t sub_bnd = 0; - uint32_t i,j; - float cpl_coord = 1.0; - uint32_t cpl_exp_tmp; - uint32_t cpl_mant_tmp; - - for (i=audblk->cplstrtmant;i<audblk->cplendmant;) { - if (!audblk->cplbndstrc[sub_bnd++]) { - cpl_exp_tmp = audblk->cplcoexp[ch][bnd] + 3 * audblk->mstrcplco[ch]; - if (audblk->cplcoexp[ch][bnd] == 15) - cpl_mant_tmp = (audblk->cplcomant[ch][bnd]) << 11; - else - cpl_mant_tmp = ((0x10) | audblk->cplcomant[ch][bnd]) << 10; - - cpl_coord = (cpl_mant_tmp * scale_factor[cpl_exp_tmp]) * 8.0f; - - //Invert the phase for the right channel if necessary - if(bsi->acmod == 0x2 && audblk->phsflginu && ch == 1 && audblk->phsflg[bnd]) - cpl_coord *= -1; - - bnd++; - } - - for(j=0;j < 12; j++) { - // Get new dither values for each channel if necessary, - // so the channels are uncorrelated - if(audblk->dithflag[ch] && !audblk->cpl_bap[i]) - samples[i] = cpl_coord * (dither_gen() * scale_factor[audblk->cpl_exp[i]]); - else - samples[i] = cpl_coord * audblk->cpl_flt[i]; - - i++; - } - } -} |