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FFmpeg/libavcodec/dolby_e.c
Andreas Rheinhardt a247ac640d avcodec: Constify AVCodecs 
Given that the AVCodec.next pointer has now been removed, most of the
AVCodecs are not modified at all any more and can therefore be made
const (as this patch does); the only exceptions are the very few codecs
for external libraries that have a init_static_data callback.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>
2021-04-27 10:43:15 -03:00

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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/float_dsp.h"
#include "libavutil/thread.h"
#include "libavutil/mem.h"
#include "libavutil/mem_internal.h"
#include "internal.h"
#include "get_bits.h"
#include "dolby_e.h"
#include "kbdwin.h"
#include "fft.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
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 {
AVCodecContext *avctx;
DBEContext dectx;
DBEChannel channels[MAX_SEGMENTS][MAX_CHANNELS];
DECLARE_ALIGNED(32, float, history)[MAX_CHANNELS][256];
FFTContext imdct[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)
{
FFTContext *imdct = &s1->imdct[g->imdct_idx];
int n = 1 << imdct_bits_tab[g->imdct_idx];
int n2 = n >> 1;
int i;
switch (g->imdct_phs) {
case 0:
imdct->imdct_half(imdct, result, values);
for (i = 0; i < n2; i++)
result[n2 + i] = result[n2 - i - 1];
break;
case 1:
imdct->imdct_calc(imdct, result, values);
break;
case 2:
imdct->imdct_half(imdct, result + n2, values);
for (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 && !(s->avctx->request_channel_layout & AV_CH_LAYOUT_NATIVE))
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, void *data,
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;
}
switch (s->metadata.nb_channels) {
case 4:
avctx->channel_layout = AV_CH_LAYOUT_4POINT0;
break;
case 6:
avctx->channel_layout = AV_CH_LAYOUT_5POINT1;
break;
case 8:
avctx->channel_layout = AV_CH_LAYOUT_7POINT1;
break;
}
avctx->channels = s->metadata.nb_channels;
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, data)) < 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;
int i;
for (i = 0; i < 3; i++)
ff_mdct_end(&s->imdct[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
ff_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
ff_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;
int i;
if (ff_thread_once(&init_once, init_tables))
return AVERROR_UNKNOWN;
for (i = 0; i < 3; i++)
if (ff_mdct_init(&s->imdct[i], imdct_bits_tab[i], 1, 2.0) < 0)
return AVERROR(ENOMEM);
if (!(s->fdsp = avpriv_float_dsp_alloc(0)))
return AVERROR(ENOMEM);
s->dectx.metadata.multi_prog_warned = !!(avctx->request_channel_layout & AV_CH_LAYOUT_NATIVE);
s->dectx.avctx = s->avctx = avctx;
return 0;
}
const AVCodec ff_dolby_e_decoder = {
.name = "dolby_e",
.long_name = NULL_IF_CONFIG_SMALL("Dolby E"),
.type = AVMEDIA_TYPE_AUDIO,
.id = AV_CODEC_ID_DOLBY_E,
.priv_data_size = sizeof(DBEDecodeContext),
.init = dolby_e_init,
.decode = dolby_e_decode_frame,
.close = dolby_e_close,
.flush = dolby_e_flush,
.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF,
.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE },
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
};
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