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0c6203c97a
FFmpeg/libavcodec/dolby_e.c
Andreas Rheinhardt 0c6203c97a all: Don't set AVClass.item_name to its default value 
Unnecessary since acf63d5350adeae551d412db699f8ca03f7e76b9;
also avoids relocations.

Reviewed-by: Anton Khirnov <anton@khirnov.net>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2023-12-22 15:12:33 +01:00

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/*
* Copyright (C) 2017 foo86
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/channel_layout.h"
#include "libavutil/float_dsp.h"
#include "libavutil/thread.h"
#include "libavutil/mem.h"
#include "libavutil/mem_internal.h"
#include "libavutil/opt.h"
#include "libavutil/tx.h"
#include "codec_internal.h"
#include "decode.h"
#include "get_bits.h"
#include "dolby_e.h"
#include "kbdwin.h"
#define MAX_SEGMENTS 2
#define MAX_GROUPS 8
#define MAX_EXPONENTS 304
#define MAX_MANTISSAS 1024
#define MAX_MSTR_EXP 2
#define MAX_BIAS_EXP 50
enum DBEOutputChannelOrder {
CHANNEL_ORDER_DEFAULT,
CHANNEL_ORDER_CODED,
};
typedef struct DBEGroup {
uint8_t nb_exponent;
uint8_t nb_bias_exp[MAX_MSTR_EXP];
uint16_t exp_ofs;
uint16_t mnt_ofs;
const uint8_t *nb_mantissa;
uint8_t imdct_idx;
uint8_t imdct_phs;
uint16_t win_len;
uint16_t dst_ofs;
uint16_t win_ofs;
uint16_t src_ofs;
} DBEGroup;
typedef struct DBEChannel {
int gr_code;
int bw_code;
int nb_groups;
int nb_mstr_exp;
DBEGroup groups[MAX_GROUPS];
int exp_strategy[MAX_GROUPS];
int exponents[MAX_EXPONENTS];
int bap[MAX_EXPONENTS];
int idx[MAX_EXPONENTS];
DECLARE_ALIGNED(32, float, mantissas)[MAX_MANTISSAS];
} DBEChannel;
typedef struct DBEDecodeContext {
const AVClass *class;
AVCodecContext *avctx;
DBEContext dectx;
DBEChannel channels[MAX_SEGMENTS][MAX_CHANNELS];
DECLARE_ALIGNED(32, float, history)[MAX_CHANNELS][256];
AVTXContext *imdct[2][3];
av_tx_fn imdct_fn[2][3];
AVFloatDSPContext *fdsp;
} DBEDecodeContext;
static const int8_t lfe_channel_tab[MAX_PROG_CONF + 1] = {
5, 5, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 5, 5
};
static const uint8_t ch_reorder_4[4] = { 0, 2, 1, 3 };
static const uint8_t ch_reorder_6[6] = { 0, 2, 4, 1, 3, 5 };
static const uint8_t ch_reorder_8[8] = { 0, 2, 6, 4, 1, 3, 7, 5 };
static const uint8_t ch_reorder_n[8] = { 0, 2, 4, 6, 1, 3, 5, 7 };
static const uint8_t nb_groups_tab[4] = { 1, 8, 7, 1 };
static const uint8_t nb_mstr_exp_tab[4] = { 2, 2, 2, 1 };
static const uint8_t nb_mantissa_38[38] = {
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
2, 2, 2, 2, 2, 2, 3, 3, 3, 4, 4, 4, 5, 5, 6, 6,
7, 8, 9, 10, 11, 12,
};
static const uint8_t nb_mantissa_44[44] = {
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2,
2, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 5, 5, 6, 7, 7,
8, 9, 10, 11, 12, 13, 15, 16, 18, 20, 22, 25,
};
static const uint8_t nb_mantissa_50[50] = {
1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3,
3, 4, 4, 5, 5, 6, 6, 7, 8, 9, 9, 10, 12, 13, 14, 16,
18, 19, 22, 24, 27, 29, 32, 36, 40, 44, 49, 54, 60, 66, 74, 82,
90, 100,
};
static const uint8_t imdct_bits_tab[3] = { 8, 9, 11 };
static const DBEGroup grp_tab_0[1] = {
{ 50, { 27, 23 }, 0, 0, nb_mantissa_50, 2, 0, 1152, 0, 1408, 0 },
};
static const DBEGroup grp_tab_1[8] = {
{ 38, { 12, 26 }, 0, 0, nb_mantissa_38, 0, 0, 192, 0, 256, 0 },
{ 38, { 12, 26 }, 38, 128, nb_mantissa_38, 0, 1, 256, 64, 448, 0 },
{ 38, { 12, 26 }, 76, 256, nb_mantissa_38, 0, 1, 256, 192, 704, 0 },
{ 38, { 12, 26 }, 114, 384, nb_mantissa_38, 0, 1, 256, 320, 0, 0 },
{ 38, { 12, 26 }, 152, 512, nb_mantissa_38, 0, 1, 256, 448, 0, 0 },
{ 38, { 12, 26 }, 190, 640, nb_mantissa_38, 0, 1, 256, 576, 0, 0 },
{ 38, { 12, 26 }, 228, 768, nb_mantissa_38, 0, 1, 256, 704, 0, 0 },
{ 38, { 12, 26 }, 266, 896, nb_mantissa_38, 0, 1, 256, 832, 0, 0 },
};
static const DBEGroup grp_tab_2[7] = {
{ 38, { 12, 26 }, 0, 0, nb_mantissa_38, 0, 0, 192, 0, 256, 0 },
{ 38, { 12, 26 }, 38, 128, nb_mantissa_38, 0, 1, 256, 64, 448, 0 },
{ 38, { 12, 26 }, 76, 256, nb_mantissa_38, 0, 1, 256, 192, 704, 0 },
{ 38, { 12, 26 }, 114, 384, nb_mantissa_38, 0, 1, 256, 320, 0, 0 },
{ 38, { 12, 26 }, 152, 512, nb_mantissa_38, 0, 1, 256, 448, 0, 0 },
{ 38, { 12, 26 }, 190, 640, nb_mantissa_38, 0, 1, 256, 576, 0, 0 },
{ 44, { 19, 25 }, 228, 768, nb_mantissa_44, 1, 1, 448, 704, 960, 64 },
};
static const DBEGroup grp_tab_3[1] = {
{ 21, { 21 }, 0, 0, nb_mantissa_50, 2, 0, 1152, 0, 1408, 0 },
};
static const DBEGroup grp_tab_4[1] = {
{ 50, { 27, 23 }, 0, 0, nb_mantissa_50, 2, 2, 1152, 0, 1408, 896 },
};
static const DBEGroup grp_tab_5[8] = {
{ 38, { 12, 26 }, 0, 0, nb_mantissa_38, 0, 1, 256, 64, 0, 0 },
{ 38, { 12, 26 }, 38, 128, nb_mantissa_38, 0, 1, 256, 192, 0, 0 },
{ 38, { 12, 26 }, 76, 256, nb_mantissa_38, 0, 1, 256, 320, 0, 0 },
{ 38, { 12, 26 }, 114, 384, nb_mantissa_38, 0, 1, 256, 448, 0, 0 },
{ 38, { 12, 26 }, 152, 512, nb_mantissa_38, 0, 1, 256, 576, 0, 0 },
{ 38, { 12, 26 }, 190, 640, nb_mantissa_38, 0, 1, 256, 704, 3008, 0 },
{ 38, { 12, 26 }, 228, 768, nb_mantissa_38, 0, 1, 256, 832, 2752, 0 },
{ 38, { 12, 26 }, 266, 896, nb_mantissa_38, 0, 2, 192, 960, 2560, 64 },
};
static const DBEGroup grp_tab_6[7] = {
{ 44, { 19, 25 }, 0, 0, nb_mantissa_44, 1, 1, 448, 0, 3264, 0 },
{ 38, { 12, 26 }, 44, 256, nb_mantissa_38, 0, 1, 256, 320, 0, 0 },
{ 38, { 12, 26 }, 82, 384, nb_mantissa_38, 0, 1, 256, 448, 0, 0 },
{ 38, { 12, 26 }, 120, 512, nb_mantissa_38, 0, 1, 256, 576, 0, 0 },
{ 38, { 12, 26 }, 158, 640, nb_mantissa_38, 0, 1, 256, 704, 3008, 0 },
{ 38, { 12, 26 }, 196, 768, nb_mantissa_38, 0, 1, 256, 832, 2752, 0 },
{ 38, { 12, 26 }, 234, 896, nb_mantissa_38, 0, 2, 192, 960, 2560, 64 },
};
static const DBEGroup grp_tab_7[1] = {
{ 21, { 21 }, 0, 0, nb_mantissa_50, 2, 2, 1152, 0, 1408, 896 },
};
static const DBEGroup *const frm_ofs_tab[2][4] = {
{ grp_tab_0, grp_tab_1, grp_tab_2, grp_tab_3 },
{ grp_tab_4, grp_tab_5, grp_tab_6, grp_tab_7 }
};
static const uint8_t mantissa_size1[16][4] = {
{ 0, 0, 0, 0 }, { 2, 1, 1, 1 }, { 3, 2, 1, 1 }, { 4, 3, 2, 1 },
{ 5, 4, 3, 2 }, { 6, 5, 4, 3 }, { 7, 6, 5, 4 }, { 8, 7, 6, 5 },
{ 9, 8, 7, 6 }, { 10, 9, 8, 7 }, { 11, 10, 9, 8 }, { 12, 11, 10, 9 },
{ 13, 12, 11, 10 }, { 14, 13, 12, 11 }, { 15, 14, 13, 12 }, { 16, 15, 14, 13 },
};
static const uint8_t mantissa_size2[16][4] = {
{ 0, 0, 0, 0 }, { 2, 1, 2, 2 }, { 3, 2, 3, 3 }, { 4, 3, 4, 4 },
{ 5, 4, 5, 5 }, { 6, 5, 6, 6 }, { 7, 6, 7, 7 }, { 8, 7, 8, 8 },
{ 9, 8, 9, 9 }, { 10, 9, 10, 10 }, { 11, 10, 11, 11 }, { 12, 11, 12, 12 },
{ 13, 12, 13, 13 }, { 14, 13, 14, 14 }, { 15, 14, 15, 15 }, { 16, 15, 16, 16 },
};
static const float start_window[192] = {
0.00161569379826, 0.00185748233347, 0.00198562758548, 0.00207834078104,
0.00215717748523, 0.00223067096393, 0.00230299213147, 0.00237651215396,
0.00245275561606, 0.00253281402069, 0.00261754673613, 0.00270768786168,
0.00280390761895, 0.00290684998656, 0.00301715751161, 0.00313548872798,
0.00326253122934, 0.00339901215995, 0.00354570716636, 0.00370344845023,
0.00387313232586, 0.00405572653911, 0.00425227750970, 0.00446391759265,
0.00469187240551, 0.00493746822816, 0.00520213944619, 0.00548743597507,
0.00579503056737, 0.00612672586953, 0.00648446105606, 0.00687031782873,
0.00728652552677, 0.00773546505205, 0.00821967127415, 0.00874183354619,
0.00930479393832, 0.00991154278653, 0.01056521116692, 0.01126905994567,
0.01202646513050, 0.01284089936559, 0.01371590957417, 0.01465509096066,
0.01566205783408, 0.01674041199523, 0.01789370972358, 0.01912542867865,
0.02043893626265, 0.02183746113793, 0.02332406961796, 0.02490164852364,
0.02657289580178, 0.02834031974193, 0.03020624702903, 0.03217283918354,
0.03424211623810, 0.03641598586180, 0.03869627565015, 0.04108476601498,
0.04358322107390, 0.04619341515939, 0.04891715301882, 0.05175628239149,
0.05471237327267, 0.05778734733755, 0.06098291402413, 0.06430101352084,
0.06774345212186, 0.07131188644726, 0.07500780649199, 0.07883251748595,
0.08278712056651, 0.08687249228061, 0.09108926295730, 0.09543779401074,
0.09991815425851, 0.10453009536427, 0.10927302653894, 0.11414598865987,
0.11914762799220, 0.12427616972097, 0.12952939152560, 0.13490459744934,
0.14039859233595, 0.14600765712201, 0.15172752528722, 0.15755336077528,
0.16347973770491, 0.16950062219342, 0.17560935661442, 0.18179864660619,
0.18806055113821, 0.19438647593012, 0.20076717050010, 0.20719272909882,
0.21365259576030, 0.22013557367283, 0.22662983904194, 0.23312295958328,
0.23960191774666, 0.24605313873388, 0.25246252333253, 0.25881548554631,
0.26509699495987, 0.27129162373316, 0.27738359807707, 0.28335685401987,
0.28919509723179, 0.29488186663467, 0.30040060148455, 0.30573471157819,
0.31086765019993, 0.31578298939317, 0.32046449711227, 0.32489621578468,
0.32906254179156, 0.33294830535654, 0.33653885031840, 0.33982011325336,
0.34277870140679, 0.34540196889300, 0.34767809062480, 0.34959613344194,
0.35114612391958, 0.35231911235422, 0.35310723244504, 0.35350375621308,
0.35350314372945, 0.35310108725579, 0.35229454943591, 0.35108179521634,
0.34946241721522, 0.34743735430290, 0.34500890320420, 0.34218072298001,
0.33895783229541, 0.33534659943168, 0.33135472505060, 0.32699121776996,
0.32226636266000, 0.31719168282019, 0.31177989424432, 0.30604485422875,
0.30000150362379, 0.29366580327088, 0.28705466500775, 0.28018587766131,
0.27307802848095, 0.26575042049535, 0.25822298630189, 0.25051619882000,
0.24265097955783, 0.23464860495522, 0.22653061137548, 0.21831869932335,
0.21003463746705, 0.20170016703857, 0.19333690717811, 0.18496626177620,
0.17660932835062, 0.16828680947474, 0.16001892724986, 0.15182534128597,
0.14372507062477, 0.13573642000364, 0.12787691082233, 0.12016321713317,
0.11261110693234, 0.10523538898282, 0.09804986534955, 0.09106728977263,
0.08429933194438, 0.07775654768810, 0.07144835495683, 0.06538301547324,
0.05956762170687, 0.05400808871425, 0.04870915012107, 0.04367435714993,
0.03890607899172, 0.03440550179663, 0.03017262174627, 0.02620622428513,
0.02250383492507, 0.01906161305732, 0.01587412848221, 0.01293388032354,
0.01023019677288, 0.00774641320626, 0.00545109736891, 0.00325868651263,
};
static const float short_window2[192] = {
0.00018861094606, 0.00033433010202, 0.00050309624485, 0.00070306161748,
0.00093995174533, 0.00121913067128, 0.00154606505568, 0.00192647806126,
0.00236641248692, 0.00287225985240, 0.00345077377440, 0.00410907465023,
0.00485464855241, 0.00569534163219, 0.00663935063508, 0.00769520981249,
0.00887177436246, 0.01017820046395, 0.01162392194150, 0.01321862359335,
0.01497221122468, 0.01689477844427, 0.01899657030441, 0.02128794388846,
0.02377932597692, 0.02648116795039, 0.02940389811590, 0.03255787167130,
0.03595331854986, 0.03960028941437, 0.04350860009563, 0.04768777479454,
0.05214698838949, 0.05689500821121, 0.06194013566525, 0.06729014809766,
0.07295224131210, 0.07893297315602, 0.08523820859989, 0.09187306673620,
0.09884187012422, 0.10614809690222, 0.11379433608064, 0.12178224641797,
0.13011251926531, 0.13878484574660, 0.14779788861830, 0.15714925912610,
0.16683549914631, 0.17685206886673, 0.18719334022589, 0.19785259629099,
0.20882203671372, 0.22009278936030, 0.23165492816694, 0.24349749722585,
0.25560854105961, 0.26797514099368, 0.28058345748882, 0.29341877824732,
0.30646557185942, 0.31970754671026, 0.33312771482295, 0.34670846027024,
0.36043161174692, 0.37427851885723, 0.38823013163645, 0.40226708279486,
0.41636977214436, 0.43051845264462, 0.44469331748632, 0.45887458761470,
0.47304259908636, 0.48717788964798, 0.50126128392546, 0.51527397661778,
0.52919761310050, 0.54301436685998, 0.55670701320069, 0.57025899869448,
0.58365450587230, 0.59687851269542, 0.60991684638414, 0.62275623122793,
0.63538433005035, 0.64778977905593, 0.65996221584264, 0.67189230042379,
0.68357172916486, 0.69499324160511, 0.70615062019861, 0.71703868307548,
0.72765326998919, 0.73799122168099, 0.74805035295521, 0.75782941981995,
0.76732808110520, 0.77654685502339, 0.78548707118622, 0.79415081863423,
0.80254089047207, 0.81066072573188, 0.81851434910893, 0.82610630922734,
0.83344161609862, 0.84052567843230, 0.84736424144524, 0.85396332579459,
0.86032916822973, 0.86646816451999, 0.87238681516918, 0.87809167437532,
0.88358930263537, 0.88888622333073, 0.89398888356256, 0.89890361943564,
0.90363662591861, 0.90819393133744, 0.91258137648979, 0.91680459830070,
0.92086901787718, 0.92477983276087, 0.92854201312583, 0.93216030163834,
0.93563921662343, 0.93898305819384, 0.94219591693690, 0.94528168477979,
0.94823843319821, 0.95106834367330, 0.95377776558539, 0.95636718335775,
0.95883679961479, 0.96118650212341, 0.96341583179195, 0.96552395212906,
0.96750962060547, 0.96937116231768, 0.97110644638309, 0.97271286544154,
0.97418731862798, 0.97552619834964, 0.97672538116257, 0.97778022299974,
0.97868555895586, 0.97943570778357, 0.98002448120255, 0.98044519806866,
0.98069070339493, 0.98075339216123, 0.98062523779637, 0.98029782516478,
0.97976238784222, 0.97900984942031, 0.97803086854002, 0.97681588731895,
0.97535518280755, 0.97363892108474, 0.97165721358452, 0.96940017523145,
0.96685798395452, 0.96402094114589, 0.96087953263194, 0.95742448973047,
0.95364684997699, 0.94953801711660, 0.94508981997396, 0.94029456983253,
0.93514511597504, 0.92963489905951, 0.92375800202883, 0.91750919827624,
0.91088399681406, 0.90387868421832, 0.89649036314692, 0.88871698725397,
0.88055739234735, 0.87201132366062, 0.86307945913336, 0.85376342861693,
0.84406582894455, 0.83399023482637, 0.82354120554757, 0.81272428745995,
0.80154601230457, 0.79001389138101, 0.77813640562199, 0.76592299164227,
0.75338402384395, 0.74053079267526, 0.72737547915460, 0.71393112578527,
};
static const float short_window3[64] = {
0.00326887936450, 0.00550242900936, 0.00786846643791, 0.01045683453520,
0.01330402120132, 0.01643221072863, 0.01985798040609, 0.02359509464766,
0.02765559221954, 0.03205025893128, 0.03678884369614, 0.04188015679495,
0.04733210987781, 0.05315172583924, 0.05934513287609, 0.06591755045290,
0.07287327156378, 0.08021564389822, 0.08794705152307, 0.09606889811179,
0.10458159240070, 0.11348453632940, 0.12277611617809, 0.13245369691511,
0.14251361989876, 0.15295120402567, 0.16376075037904, 0.17493555039885,
0.18646789757072, 0.19834910260891, 0.21056951208995, 0.22311853047787,
0.23598464546683, 0.24915545655419, 0.26261770674500, 0.27635731727778,
0.29035942525136, 0.30460842402318, 0.31908800624032, 0.33378120935681,
0.34867046348260, 0.36373764140285, 0.37896411059909, 0.39433078709788,
0.40981819096657, 0.42540650327031, 0.44107562429959, 0.45680523287270,
0.47257484651351, 0.48836388230077, 0.50415171818214, 0.51991775454258,
0.53564147581496, 0.55130251191887, 0.56688069931047, 0.58235614142007,
0.59770926827271, 0.61292089506118, 0.62797227945823, 0.64284517745255,
0.65752189749349, 0.67198535273209, 0.68621911114984, 0.70020744337099,
};
static const uint8_t dc_code_tab[5] = { 0, 0, 0, 1, 1 };
static const uint8_t ht_code_tab[5] = { 0, 0, 1, 2, 2 };
static const uint8_t band_ofs_tab[3][4] = {
{ 12, 8, 4, 0 }, { 14, 10, 6, 0 }, { 12, 8, 4, 0 }
};
static const uint8_t band_low_tab[3] = { 9, 17, 24 };
static const uint16_t fast_gain_tab[8] = {
128, 256, 384, 512, 640, 768, 896, 1024
};
static const uint16_t slow_decay_tab[2][2] = { { 27, -1 }, { 32, 21 } };
static const uint16_t misc_decay_tab[3][2][2] = {
{ { 354, -1 }, { 425, 425 } },
{ { 266, -1 }, { 320, -1 } },
{ { 213, -1 }, { 256, -1 } }
};
static const uint16_t fast_decay_tab[3][2][2][50] = {
{{{
142, 142, 142, 142, 142, 142, 142, 142, 142, 142,
142, 142, 142, 142, 142, 142, 142, 142, 142, 142,
142, 142, 142, 142, 142, 142, 142, 142, 142, 142,
142, 142, 142, 142, 142, 142, 142, 142,
}, {
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1,
}}, {{
170, 170, 170, 170, 170, 170, 170, 170, 170, 170,
170, 170, 170, 170, 170, 170, 170, 170, 170, 170,
170, 170, 170, 170, 170, 170, 170, 170, 170, 170,
170, 170, 170, 170, 170, 170, 170, 170,
}, {
64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64,
}}}, {{{
266, 266, 106, 106, 106, 106, 106, 106, 106, 106,
106, 106, 106, 106, 106, 106, 106, 106, 106, 106,
106, 106, 106, 106, 106, 106, 106, 106, 106, 106,
106, 106, 106, 106, 106, 106, 106, 106, 106, 106,
106, 106, 106, 106,
}, {
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1,
}}, {{
319, 319, 128, 128, 128, 128, 128, 128, 128, 128,
128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
128, 128, 128, 128,
}, {
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1,
}}}, {{{
106, 106, 106, 106, 106, 106, 106, 106, 106, 106,
106, 106, 106, 106, 106, 106, 106, 106, 106, 106,
106, 106, 106, 106, 106, 106, 106, 106, 106, 106,
106, 106, 106, 106, 106, 106, 106, 106, 106, 106,
106, 106, 106, 106, 106, 106, 106, 106, 106, 106,
}, {
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
}}, {{
128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
}, {
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
}}}
};
static const uint16_t fast_gain_adj_tab[3][2][62] = {
{{
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 1, 2, 4, 7, 11, 16, 29, 44, 59,
76, 94, 116, 142, 179, 221, 252, 285, 312, 334,
}, {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
2, 5, 8, 10, 15, 28, 42, 57, 75, 93,
115, 140, 177, 219, 247, 280, 308, 330, 427, 533,
}}, {{
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 2, 5, 8, 12, 21, 35, 51, 69, 89,
111, 138, 176, 220, 251, 284, 312, 334,
}, {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 2,
5, 8, 11, 18, 33, 49, 65, 84, 106, 132,
168, 214, 245, 279, 308, 329, 427, 533,
}}, {{
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 1, 4, 7, 10, 17,
31, 47, 65, 84, 107, 134, 171, 215, 250, 283,
312, 334,
}, {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 3, 6, 9, 13, 27, 43,
60, 79, 100, 126, 160, 207, 242, 276, 307, 329,
427, 533,
}}
};
static const uint16_t slow_gain_tab[3][2][50] = {
{{
3072, 3072, 3072, 3072, 3072, 3072, 1063, 1063, 1063, 1063,
1063, 1063, 1063, 1063, 1063, 1063, 1063, 1063, 1063, 1063,
1063, 1063, 1063, 1063, 1063, 1063, 1063, 1063, 1063, 1063,
1063, 1063, 1063, 1063, 1063, 1063, 1063, 1063,
}, {
3072, 3072, 3072, 3072, 3072, 3072, 850, 850, 850, 850,
850, 850, 850, 850, 850, 850, 850, 850, 850, 850,
850, 850, 850, 850, 850, 850, 850, 850, 850, 850,
850, 850, 850, 850, 850, 850, 850, 850,
}}, {{
3072, 1212, 1212, 1212, 999, 999, 999, 999, 999, 999,
999, 999, 999, 999, 999, 999, 999, 999, 999, 999,
999, 999, 999, 999, 999, 999, 999, 999, 999, 999,
999, 999, 999, 999, 999, 999, 999, 999, 999, 999,
999, 999, 999, 999,
}, {
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1,
}}, {{
3072, 3072, 3072, 3072, 3072, 3072, 3072, 3072, 3072, 3072,
999, 999, 999, 999, 999, 999, 999, 999, 999, 999,
999, 999, 999, 999, 999, 999, 999, 999, 999, 999,
999, 999, 999, 999, 999, 999, 999, 999, 999, 999,
999, 999, 999, 999, 999, 999, 999, 999, 999, 999,
}, {
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
}}
};
static const uint16_t hearing_thresh_tab[3][3][50] = {
{{
1403, 1141, 1000, 959, 948, 957, 946, 925, 899, 871,
843, 815, 789, 766, 745, 727, 705, 687, 681, 686,
701, 725, 768, 854, 940, 1018, 1075, 1103, 1111, 1106,
1098, 1105, 1142, 1237, 1419, 1721, 2169, 2805,
}, {
1401, 1130, 995, 957, 947, 955, 941, 918, 890, 861,
831, 803, 777, 754, 734, 717, 698, 684, 682, 692,
712, 743, 798, 894, 976, 1045, 1091, 1109, 1110, 1102,
1098, 1116, 1174, 1300, 1526, 1884, 2401, 3072,
}, {
1393, 1086, 974, 949, 957, 941, 913, 878, 843, 808,
777, 750, 727, 708, 695, 686, 681, 689, 714, 752,
811, 888, 971, 1044, 1087, 1108, 1110, 1102, 1098, 1115,
1172, 1290, 1489, 1812, 2293, 2964, 3072, 3072,
}}, {{
1412, 1343, 1141, 1047, 1000, 974, 959, 951, 948, 947,
957, 953, 946, 936, 925, 906, 878, 850, 822, 795,
771, 745, 719, 700, 687, 681, 685, 701, 733, 784,
885, 977, 1047, 1092, 1110, 1108, 1099, 1102, 1138, 1233,
1413, 1711, 2157, 2797,
}, {
1412, 1336, 1130, 1040, 995, 970, 957, 950, 947, 947,
955, 950, 941, 930, 918, 897, 868, 838, 810, 783,
759, 734, 710, 693, 684, 681, 690, 712, 752, 823,
924, 1009, 1069, 1102, 1111, 1104, 1098, 1111, 1168, 1295,
1518, 1873, 2388, 3072,
}, {
1411, 1293, 1086, 1009, 974, 957, 949, 947, 957, 951,
941, 928, 913, 896, 878, 852, 817, 785, 756, 732,
713, 695, 683, 682, 689, 710, 746, 811, 906, 992,
1061, 1099, 1111, 1106, 1098, 1107, 1155, 1266, 1471, 1799,
2277, 2945, 3072, 3072,
}}, {{
1431, 1412, 1403, 1379, 1343, 1293, 1229, 1180, 1125, 1075,
1040, 1014, 996, 979, 965, 957, 951, 948, 947, 957,
951, 940, 924, 903, 877, 846, 815, 785, 753, 725,
702, 686, 681, 689, 714, 760, 847, 947, 1028, 1083,
1108, 1109, 1101, 1100, 1132, 1222, 1402, 1705, 2160, 2803,
}, {
1431, 1412, 1401, 1375, 1336, 1278, 1215, 1168, 1115, 1066,
1032, 1008, 991, 975, 962, 954, 950, 947, 947, 955,
948, 935, 916, 894, 866, 835, 803, 772, 742, 715,
695, 683, 683, 697, 729, 784, 887, 982, 1054, 1096,
1111, 1106, 1098, 1107, 1159, 1281, 1505, 1865, 2391, 3072,
}, {
1427, 1411, 1393, 1353, 1293, 1215, 1160, 1118, 1072, 1031,
1003, 984, 971, 960, 952, 948, 947, 957, 952, 941,
924, 902, 876, 847, 815, 781, 750, 723, 700, 685,
681, 691, 719, 766, 858, 958, 1039, 1089, 1109, 1108,
1099, 1102, 1141, 1245, 1442, 1766, 2250, 2930, 3072, 3072,
}}
};
static const int16_t lwc_gain_tab[11][7] = {
{ -21, -197, -271, -466, 32767, 32767, 32767 },
{ -197, -29, -244, -271, -540, 32767, 32767 },
{ -271, -244, -29, -249, -271, -593, 32767 },
{ -466, -271, -249, -29, -251, -271, -632 },
{ -540, -271, -251, -29, -251, -271, -664 },
{ -593, -271, -251, -29, -252, -271, -690 },
{ -632, -271, -252, -29, -252, -271, -711 },
{ -664, -271, -252, -29, -252, -271, -730 },
{ -690, -271, -252, -29, -252, -271, -745 },
{ -711, -271, -252, -29, -253, -271, -759 },
{ -730, -271, -253, -29, -253, -271, -771 },
};
static const int16_t lwc_adj_tab[7] = {
-192, -320, -448, -512, -448, -320, -192,
};
static const uint8_t log_add_tab[212] = {
64, 63, 62, 61, 60, 59, 58, 57, 56, 55, 54, 53, 52, 52, 51, 50,
49, 48, 47, 47, 46, 45, 44, 44, 43, 42, 41, 41, 40, 39, 38, 38,
37, 36, 36, 35, 35, 34, 33, 33, 32, 32, 31, 30, 30, 29, 29, 28,
28, 27, 27, 26, 26, 25, 25, 24, 24, 23, 23, 22, 22, 21, 21, 21,
20, 20, 19, 19, 19, 18, 18, 18, 17, 17, 17, 16, 16, 16, 15, 15,
15, 14, 14, 14, 13, 13, 13, 13, 12, 12, 12, 12, 11, 11, 11, 11,
10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8,
7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5,
5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 0, 0,
};
static const uint8_t bap_tab[64] = {
0, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 3, 4,
4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 8,
8, 8, 8, 9, 9, 9, 9, 10, 10, 10, 10, 11, 11, 11, 11, 12,
12, 12, 12, 13, 13, 13, 13, 14, 14, 14, 14, 15, 15, 15, 15, 15,
};
static float mantissa_tab1[17][4];
static float mantissa_tab2[17][4];
static float mantissa_tab3[17][4];
static float exponent_tab[50];
static float gain_tab[1024];
DECLARE_ALIGNED(32, static float, window)[3712];
static int skip_input(DBEContext *s, int nb_words)
{
if (nb_words > s->input_size) {
av_log(s->avctx, AV_LOG_ERROR, "Packet too short\n");
return AVERROR_INVALIDDATA;
}
s->input += nb_words * s->word_bytes;
s->input_size -= nb_words;
return 0;
}
static int parse_key(DBEContext *s)
{
if (s->key_present) {
const uint8_t *key = s->input;
int ret = skip_input(s, 1);
if (ret < 0)
return ret;
return AV_RB24(key) >> 24 - s->word_bits;
}
return 0;
}
static int parse_metadata_ext(DBEDecodeContext *s1)
{
DBEContext *s = &s1->dectx;
if (s->metadata.mtd_ext_size)
return skip_input(s, s->key_present + s->metadata.mtd_ext_size + 1);
return 0;
}
static void unbias_exponents(DBEContext *s, DBEChannel *c, DBEGroup *g)
{
int mstr_exp[MAX_MSTR_EXP];
int bias_exp[MAX_BIAS_EXP];
int i, j, k;
for (i = 0; i < c->nb_mstr_exp; i++)
mstr_exp[i] = get_bits(&s->gb, 2) * 6;
for (i = 0; i < g->nb_exponent; i++)
bias_exp[i] = get_bits(&s->gb, 5);
for (i = k = 0; i < c->nb_mstr_exp; i++)
for (j = 0; j < g->nb_bias_exp[i]; j++, k++)
c->exponents[g->exp_ofs + k] = mstr_exp[i] + bias_exp[k];
}
static int parse_exponents(DBEContext *s, DBEChannel *c)
{
DBEGroup *p, *g;
int i;
for (i = 0, p = NULL, g = c->groups; i < c->nb_groups; i++, p = g, g++) {
c->exp_strategy[i] = !i || g->nb_exponent != p->nb_exponent || get_bits1(&s->gb);
if (c->exp_strategy[i]) {
unbias_exponents(s, c, g);
} else {
memcpy(c->exponents + g->exp_ofs,
c->exponents + p->exp_ofs,
g->nb_exponent * sizeof(c->exponents[0]));
}
}
return 0;
}
static inline int log_add(int a, int b)
{
int c = FFABS(a - b) >> 1;
return FFMAX(a, b) + log_add_tab[FFMIN(c, 211)];
}
static void calc_lowcomp(int *msk_val)
{
int lwc_val[17] = { 0 };
int i, j, k;
for (i = 0; i < 11; i++) {
int max_j = 0;
int max_v = INT_MIN;
int thr = 0;
for (j = FFMAX(i - 3, 0), k = 0; j <= i + 3; j++, k++) {
int v = msk_val[j] + lwc_gain_tab[i][k];
if (v > max_v) {
max_j = j;
max_v = v;
}
thr = log_add(thr, v);
}
if (msk_val[i] < thr) {
for (j = FFMAX(max_j - 3, 0),
k = FFMAX(3 - max_j, 0);
j <= max_j + 3; j++, k++)
lwc_val[j] += lwc_adj_tab[k];
}
}
for (i = 0; i < 16; i++) {
int v = FFMAX(lwc_val[i], -512);
msk_val[i] = FFMAX(msk_val[i] + v, 0);
}
}
static void bit_allocate(int nb_exponent, int nb_code, int fr_code,
int *exp, int *bap,
int fg_spc, int fg_ofs, int msk_mod, int snr_ofs)
{
int msk_val[MAX_BIAS_EXP];
int psd_val[MAX_BIAS_EXP];
int fast_leak = 0;
int slow_leak = 0;
int dc_code = dc_code_tab[fr_code - 1];
int ht_code = ht_code_tab[fr_code - 1];
int fast_gain = fast_gain_tab[fg_ofs];
int slow_decay = slow_decay_tab[dc_code][msk_mod];
int misc_decay = misc_decay_tab[nb_code][dc_code][msk_mod];
const uint16_t *slow_gain = slow_gain_tab[nb_code][msk_mod];
const uint16_t *fast_decay = fast_decay_tab[nb_code][dc_code][msk_mod];
const uint16_t *fast_gain_adj = fast_gain_adj_tab[nb_code][dc_code];
const uint16_t *hearing_thresh = hearing_thresh_tab[nb_code][ht_code];
int i;
for (i = 0; i < nb_exponent; i++)
psd_val[i] = (48 - exp[i]) * 64;
fast_gain_adj += band_ofs_tab[nb_code][fg_spc];
for (i = 0; i < nb_exponent; i++) {
fast_leak = log_add(fast_leak - fast_decay[i],
psd_val[i] - fast_gain + fast_gain_adj[i]);
slow_leak = log_add(slow_leak - slow_decay,
psd_val[i] - slow_gain[i]);
msk_val[i] = FFMAX(fast_leak, slow_leak);
}
fast_leak = 0;
for (i = nb_exponent - 1; i > band_low_tab[nb_code]; i--) {
fast_leak = log_add(fast_leak - misc_decay, psd_val[i] - fast_gain);
msk_val[i] = FFMAX(msk_val[i], fast_leak);
}
for (i = 0; i < nb_exponent; i++)
msk_val[i] = FFMAX(msk_val[i], hearing_thresh[i]);
if (!nb_code)
calc_lowcomp(msk_val);
for (i = 0; i < nb_exponent; i++) {
int v = 16 * (snr_ofs - 64) + psd_val[i] - msk_val[i] >> 5;
bap[i] = bap_tab[av_clip_uintp2(v, 6)];
}
}
static int parse_bit_alloc(DBEDecodeContext *s1, DBEChannel *c)
{
DBEContext *s = &s1->dectx;
DBEGroup *p, *g;
int bap_strategy[MAX_GROUPS], fg_spc[MAX_GROUPS];
int fg_ofs[MAX_GROUPS], msk_mod[MAX_GROUPS];
int i, snr_ofs;
for (i = 0; i < c->nb_groups; i++) {
bap_strategy[i] = !i || get_bits1(&s->gb);
if (bap_strategy[i]) {
fg_spc[i] = get_bits(&s->gb, 2);
fg_ofs[i] = get_bits(&s->gb, 3);
msk_mod[i] = get_bits1(&s->gb);
} else {
fg_spc[i] = fg_spc[i - 1];
fg_ofs[i] = fg_ofs[i - 1];
msk_mod[i] = msk_mod[i - 1];
}
}
if (get_bits1(&s->gb)) {
avpriv_report_missing_feature(s->avctx, "Delta bit allocation");
return AVERROR_PATCHWELCOME;
}
snr_ofs = get_bits(&s->gb, 8);
if (!snr_ofs) {
memset(c->bap, 0, sizeof(c->bap));
return 0;
}
for (i = 0, p = NULL, g = c->groups; i < c->nb_groups; i++, p = g, g++) {
if (c->exp_strategy[i] || bap_strategy[i]) {
bit_allocate(g->nb_exponent, g->imdct_idx, s->metadata.fr_code,
c->exponents + g->exp_ofs, c->bap + g->exp_ofs,
fg_spc[i], fg_ofs[i], msk_mod[i], snr_ofs);
} else {
memcpy(c->bap + g->exp_ofs,
c->bap + p->exp_ofs,
g->nb_exponent * sizeof(c->bap[0]));
}
}
return 0;
}
static int parse_indices(DBEContext *s, DBEChannel *c)
{
DBEGroup *p, *g;
int i, j;
for (i = 0, p = NULL, g = c->groups; i < c->nb_groups; i++, p = g, g++) {
if (get_bits1(&s->gb)) {
int start = get_bits(&s->gb, 6);
if (start > g->nb_exponent) {
av_log(s->avctx, AV_LOG_ERROR, "Invalid start index\n");
return AVERROR_INVALIDDATA;
}
for (j = 0; j < start; j++)
c->idx[g->exp_ofs + j] = 0;
for (; j < g->nb_exponent; j++)
c->idx[g->exp_ofs + j] = get_bits(&s->gb, 2);
} else if (i && g->nb_exponent == p->nb_exponent) {
memcpy(c->idx + g->exp_ofs,
c->idx + p->exp_ofs,
g->nb_exponent * sizeof(c->idx[0]));
} else {
memset(c->idx + g->exp_ofs, 0, g->nb_exponent * sizeof(c->idx[0]));
}
}
return 0;
}
static int parse_mantissas(DBEContext *s, DBEChannel *c)
{
DBEGroup *g;
int i, j, k;
for (i = 0, g = c->groups; i < c->nb_groups; i++, g++) {
float *mnt = c->mantissas + g->mnt_ofs;
for (j = 0; j < g->nb_exponent; j++) {
int bap = c->bap[g->exp_ofs + j];
int idx = c->idx[g->exp_ofs + j];
int size1 = mantissa_size1[bap][idx];
int count = g->nb_mantissa[j];
float exp = exponent_tab[c->exponents[g->exp_ofs + j]];
float scale = mantissa_tab1[size1][idx] * exp;
if (!size1) {
memset(mnt, 0, count * sizeof(*mnt));
} else if (idx) {
int values[100];
int escape = -(1 << size1 - 1);
for (k = 0; k < count; k++)
values[k] = get_sbits(&s->gb, size1);
for (k = 0; k < count; k++) {
if (values[k] != escape) {
mnt[k] = values[k] * scale;
} else {
int size2 = mantissa_size2[bap][idx];
int value = get_sbits(&s->gb, size2);
float a = mantissa_tab2[size2][idx];
float b = mantissa_tab3[size2][idx];
if (value < 0)
mnt[k] = ((value + 1) * a - b) * exp;
else
mnt[k] = (value * a + b) * exp;
}
}
} else {
for (k = 0; k < count; k++)
mnt[k] = get_sbits(&s->gb, size1) * scale;
}
mnt += count;
}
for (; j < g->nb_exponent + c->bw_code; j++) {
memset(mnt, 0, g->nb_mantissa[j] * sizeof(*mnt));
mnt += g->nb_mantissa[j];
}
}
return 0;
}
static int parse_channel(DBEDecodeContext *s1, int ch, int seg_id)
{
DBEContext *s = &s1->dectx;
DBEChannel *c = &s1->channels[seg_id][ch];
int i, ret;
if (s->metadata.rev_id[ch] > 1) {
avpriv_report_missing_feature(s->avctx, "Encoder revision %d", s->metadata.rev_id[ch]);
return AVERROR_PATCHWELCOME;
}
if (ch == lfe_channel_tab[s->metadata.prog_conf]) {
c->gr_code = 3;
c->bw_code = 29;
} else {
c->gr_code = get_bits(&s->gb, 2);
c->bw_code = get_bits(&s->gb, 3);
if (c->gr_code == 3) {
av_log(s->avctx, AV_LOG_ERROR, "Invalid group type code\n");
return AVERROR_INVALIDDATA;
}
}
c->nb_groups = nb_groups_tab[c->gr_code];
c->nb_mstr_exp = nb_mstr_exp_tab[c->gr_code];
for (i = 0; i < c->nb_groups; i++) {
c->groups[i] = frm_ofs_tab[seg_id][c->gr_code][i];
if (c->nb_mstr_exp == 2) {
c->groups[i].nb_exponent -= c->bw_code;
c->groups[i].nb_bias_exp[1] -= c->bw_code;
}
}
if ((ret = parse_exponents(s, c)) < 0)
return ret;
if ((ret = parse_bit_alloc(s1, c)) < 0)
return ret;
if ((ret = parse_indices(s, c)) < 0)
return ret;
if ((ret = parse_mantissas(s, c)) < 0)
return ret;
if (get_bits_left(&s->gb) < 0) {
av_log(s->avctx, AV_LOG_ERROR, "Read past end of channel %d\n", ch);
return AVERROR_INVALIDDATA;
}
return 0;
}
static int parse_audio(DBEDecodeContext *s1, int start, int end, int seg_id)
{
DBEContext *s = &s1->dectx;
int ch, ret, key;
if ((key = parse_key(s)) < 0)
return key;
for (ch = start; ch < end; ch++) {
if (!s->metadata.ch_size[ch]) {
s1->channels[seg_id][ch].nb_groups = 0;
continue;
}
ret = ff_dolby_e_convert_input(s, s->metadata.ch_size[ch], key);
if (ret < 0)
return ret;
if ((ret = parse_channel(s1, ch, seg_id)) < 0) {
if (s1->avctx->err_recognition & AV_EF_EXPLODE)
return ret;
s1->channels[seg_id][ch].nb_groups = 0;
}
if ((ret = skip_input(s, s->metadata.ch_size[ch])) < 0)
return ret;
}
return skip_input(s, 1);
}
static int parse_meter(DBEDecodeContext *s1)
{
DBEContext *s = &s1->dectx;
if (s->metadata.meter_size)
return skip_input(s, s->key_present + s->metadata.meter_size + 1);
return 0;
}
static void imdct_calc(DBEDecodeContext *s1, DBEGroup *g, float *result, float *values)
{
AVTXContext *imdct = s1->imdct[g->imdct_phs == 1][g->imdct_idx];
av_tx_fn imdct_fn = s1->imdct_fn[g->imdct_phs == 1][g->imdct_idx];
int n = 1 << imdct_bits_tab[g->imdct_idx];
int n2 = n >> 1;
switch (g->imdct_phs) {
case 0:
imdct_fn(imdct, result, values, sizeof(float));
for (int i = 0; i < n2; i++)
result[n2 + i] = result[n2 - i - 1];
break;
case 1:
imdct_fn(imdct, result, values, sizeof(float));
break;
case 2:
imdct_fn(imdct, result + n2, values, sizeof(float));
for (int i = 0; i < n2; i++)
result[i] = -result[n - i - 1];
break;
default:
av_assert0(0);
}
}
static void transform(DBEDecodeContext *s1, DBEChannel *c, float *history, float *output)
{
LOCAL_ALIGNED_32(float, buffer, [2048]);
LOCAL_ALIGNED_32(float, result, [1152]);
DBEGroup *g;
int i;
memset(result, 0, 1152 * sizeof(float));
for (i = 0, g = c->groups; i < c->nb_groups; i++, g++) {
float *src = buffer + g->src_ofs;
float *dst = result + g->dst_ofs;
float *win = window + g->win_ofs;
imdct_calc(s1, g, buffer, c->mantissas + g->mnt_ofs);
s1->fdsp->vector_fmul_add(dst, src, win, dst, g->win_len);
}
for (i = 0; i < 256; i++)
output[i] = history[i] + result[i];
for (i = 256; i < 896; i++)
output[i] = result[i];
for (i = 0; i < 256; i++)
history[i] = result[896 + i];
}
static void apply_gain(DBEDecodeContext *s, int begin, int end, float *output)
{
if (begin == 960 && end == 960)
return;
if (begin == end) {
s->fdsp->vector_fmul_scalar(output, output, gain_tab[end], FRAME_SAMPLES);
} else {
float a = gain_tab[begin] * (1.0f / (FRAME_SAMPLES - 1));
float b = gain_tab[end ] * (1.0f / (FRAME_SAMPLES - 1));
int i;
for (i = 0; i < FRAME_SAMPLES; i++)
output[i] *= a * (FRAME_SAMPLES - i - 1) + b * i;
}
}
static int filter_frame(DBEDecodeContext *s, AVFrame *frame)
{
const DolbyEHeaderInfo *const metadata = &s->dectx.metadata;
const uint8_t *reorder;
int ch, ret;
if (metadata->nb_channels == 4)
reorder = ch_reorder_4;
else if (metadata->nb_channels == 6)
reorder = ch_reorder_6;
else if (metadata->nb_programs == 1 && metadata->output_channel_order == CHANNEL_ORDER_DEFAULT)
reorder = ch_reorder_8;
else
reorder = ch_reorder_n;
frame->nb_samples = FRAME_SAMPLES;
if ((ret = ff_get_buffer(s->avctx, frame, 0)) < 0)
return ret;
for (ch = 0; ch < metadata->nb_channels; ch++) {
float *output = (float *)frame->extended_data[reorder[ch]];
transform(s, &s->channels[0][ch], s->history[ch], output);
transform(s, &s->channels[1][ch], s->history[ch], output + FRAME_SAMPLES / 2);
apply_gain(s, metadata->begin_gain[ch], metadata->end_gain[ch], output);
}
return 0;
}
static int dolby_e_decode_frame(AVCodecContext *avctx, AVFrame *frame,
int *got_frame_ptr, AVPacket *avpkt)
{
DBEDecodeContext *s1 = avctx->priv_data;
DBEContext *s = &s1->dectx;
int i, j, ret;
if ((ret = ff_dolby_e_parse_header(s, avpkt->data, avpkt->size)) < 0)
return ret;
if (s->metadata.nb_programs > 1 && !s->metadata.multi_prog_warned) {
av_log(avctx, AV_LOG_WARNING, "Stream has %d programs (configuration %d), "
"channels will be output in native order.\n",
s->metadata.nb_programs, s->metadata.prog_conf);
s->metadata.multi_prog_warned = 1;
}
av_channel_layout_uninit(&avctx->ch_layout);
switch (s->metadata.nb_channels) {
case 4:
avctx->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_4POINT0;
break;
case 6:
avctx->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_5POINT1;
break;
case 8:
avctx->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_7POINT1;
break;
default:
avctx->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC;
avctx->ch_layout.nb_channels = s->metadata.nb_channels;
break;
}
avctx->sample_rate = s->metadata.sample_rate;
avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
i = s->metadata.nb_channels / 2;
j = s->metadata.nb_channels;
if ((ret = parse_audio(s1, 0, i, 0)) < 0)
return ret;
if ((ret = parse_audio(s1, i, j, 0)) < 0)
return ret;
if ((ret = parse_metadata_ext(s1)) < 0)
return ret;
if ((ret = parse_audio(s1, 0, i, 1)) < 0)
return ret;
if ((ret = parse_audio(s1, i, j, 1)) < 0)
return ret;
if ((ret = parse_meter(s1)) < 0)
return ret;
if ((ret = filter_frame(s1, frame)) < 0)
return ret;
*got_frame_ptr = 1;
return avpkt->size;
}
static av_cold void dolby_e_flush(AVCodecContext *avctx)
{
DBEDecodeContext *s = avctx->priv_data;
memset(s->history, 0, sizeof(s->history));
}
static av_cold int dolby_e_close(AVCodecContext *avctx)
{
DBEDecodeContext *s = avctx->priv_data;
for (int i = 0; i < 3; i++) {
av_tx_uninit(&s->imdct[0][i]);
av_tx_uninit(&s->imdct[1][i]);
}
av_freep(&s->fdsp);
return 0;
}
static av_cold void init_tables(void)
{
int i, j;
for (i = 1; i < 17; i++)
mantissa_tab1[i][0] = 1.0f / (1 << i - 1);
for (i = 2; i < 16; i++) {
mantissa_tab1[i][1] = 1.0f / ((1 << i) - 1);
mantissa_tab1[i][2] = 0.5f / ((1 << i) - 1);
mantissa_tab1[i][3] = 0.25f / ((1 << i) - 1);
}
mantissa_tab1[i][1] = 0.5f / (1 << 15);
mantissa_tab1[i][2] = 0.75f / (1 << 15);
mantissa_tab1[i][3] = 0.875f / (1 << 15);
for (i = 1; i < 17; i++) {
mantissa_tab2[i][1] = mantissa_tab1[i][0] * 0.5f;
mantissa_tab2[i][2] = mantissa_tab1[i][0] * 0.75f;
mantissa_tab2[i][3] = mantissa_tab1[i][0] * 0.875f;
for (j = 1; j < 4; j++)
mantissa_tab3[i][j] = 1.0f / (1 << i) + 1.0f / (1 << j) - 1.0f / (1 << i + j);
}
mantissa_tab3[1][3] = 0.6875f;
for (i = 0; i < 25; i++) {
exponent_tab[i * 2 ] = 1.0f / (1 << i);
exponent_tab[i * 2 + 1] = M_SQRT1_2 / (1 << i);
}
for (i = 1; i < 1024; i++)
gain_tab[i] = exp2f((i - 960) / 64.0f);
// short 1
avpriv_kbd_window_init(window, 3.0f, 128);
for (i = 0; i < 128; i++)
window[128 + i] = window[127 - i];
// start
for (i = 0; i < 192; i++)
window[256 + i] = start_window[i];
// short 2
for (i = 0; i < 192; i++)
window[448 + i] = short_window2[i];
for (i = 0; i < 64; i++)
window[640 + i] = window[63 - i];
// short 3
for (i = 0; i < 64; i++)
window[704 + i] = short_window3[i];
for (i = 0; i < 192; i++)
window[768 + i] = window[64 + i];
// bridge
for (i = 0; i < 128; i++)
window[960 + i] = window[i];
for (i = 0; i < 64; i++)
window[1088 + i] = 1.0f;
// long
avpriv_kbd_window_init(window + 1408, 3.0f, 256);
for (i = 0; i < 640; i++)
window[1664 + i] = 1.0f;
for (i = 0; i < 256; i++)
window[2304 + i] = window[1152 + i] = window[1663 - i];
// reverse start
for (i = 0; i < 192; i++)
window[2560 + i] = window[447 - i];
// reverse short 2
for (i = 0; i < 256; i++)
window[2752 + i] = window[703 - i];
// reverse short 3
for (i = 0; i < 256; i++)
window[3008 + i] = window[959 - i];
// reverse bridge
for (i = 0; i < 448; i++)
window[3264 + i] = window[1407 - i];
}
static av_cold int dolby_e_init(AVCodecContext *avctx)
{
static AVOnce init_once = AV_ONCE_INIT;
DBEDecodeContext *s = avctx->priv_data;
float scale = 2.0f;
int ret;
if (ff_thread_once(&init_once, init_tables))
return AVERROR_UNKNOWN;
for (int i = 0; i < 3; i++) {
if ((ret = av_tx_init(&s->imdct[0][i], &s->imdct_fn[0][i], AV_TX_FLOAT_MDCT,
1, 1 << imdct_bits_tab[i] - 1, &scale, 0)) < 0)
return ret;
if ((ret = av_tx_init(&s->imdct[1][i], &s->imdct_fn[1][i], AV_TX_FLOAT_MDCT,
1, 1 << imdct_bits_tab[i] - 1, &scale, AV_TX_FULL_IMDCT)) < 0)
return ret;
}
if (!(s->fdsp = avpriv_float_dsp_alloc(0)))
return AVERROR(ENOMEM);
#if FF_API_OLD_CHANNEL_LAYOUT
FF_DISABLE_DEPRECATION_WARNINGS
if (avctx->request_channel_layout & AV_CH_LAYOUT_NATIVE)
s->dectx.metadata.output_channel_order = CHANNEL_ORDER_CODED;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
s->dectx.metadata.multi_prog_warned = s->dectx.metadata.output_channel_order == CHANNEL_ORDER_CODED;
s->dectx.avctx = s->avctx = avctx;
return 0;
}
#define OFFSET(x) offsetof(DBEDecodeContext, x)
#define FLAGS (AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_AUDIO_PARAM)
static const AVOption options[] = {
{ "channel_order", "Order in which the channels are to be exported",
OFFSET(dectx.metadata.output_channel_order), AV_OPT_TYPE_INT,
{ .i64 = CHANNEL_ORDER_DEFAULT }, 0, 1, FLAGS, "channel_order" },
{ "default", "normal libavcodec channel order", 0, AV_OPT_TYPE_CONST,
{ .i64 = CHANNEL_ORDER_DEFAULT }, .flags = FLAGS, "channel_order" },
{ "coded", "order in which the channels are coded in the bitstream",
0, AV_OPT_TYPE_CONST, { .i64 = CHANNEL_ORDER_CODED }, .flags = FLAGS, "channel_order" },
{ NULL },
};
static const AVClass dolby_e_decoder_class = {
.class_name = "Dolby E decoder",
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
const FFCodec ff_dolby_e_decoder = {
.p.name = "dolby_e",
CODEC_LONG_NAME("Dolby E"),
.p.type = AVMEDIA_TYPE_AUDIO,
.p.id = AV_CODEC_ID_DOLBY_E,
.priv_data_size = sizeof(DBEDecodeContext),
.p.priv_class = &dolby_e_decoder_class,
.init = dolby_e_init,
FF_CODEC_DECODE_CB(dolby_e_decode_frame),
.close = dolby_e_close,
.flush = dolby_e_flush,
.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF,
.p.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE },
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
};
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