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diff --git a/audio_codec/libfaad/specrec.c b/audio_codec/libfaad/specrec.c new file mode 100644 index 0000000..cc09800 --- a/dev/null +++ b/audio_codec/libfaad/specrec.c @@ -0,0 +1,1249 @@ +/* +** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding +** Copyright (C) 2003-2005 M. Bakker, Nero AG, http://www.nero.com +** +** This program 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 of the License, or +** (at your option) any later version. +** +** This program 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 this program; if not, write to the Free Software +** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. +** +** Any non-GPL usage of this software or parts of this software is strictly +** forbidden. +** +** The "appropriate copyright message" mentioned in section 2c of the GPLv2 +** must read: "Code from FAAD2 is copyright (c) Nero AG, www.nero.com" +** +** Commercial non-GPL licensing of this software is possible. +** For more info contact Nero AG through Mpeg4AAClicense@nero.com. +** +** $Id: specrec.c,v 1.62 2009/01/26 23:51:15 menno Exp $ +**/ + +/* + Spectral reconstruction: + - grouping/sectioning + - inverse quantization + - applying scalefactors +*/ +#include <stdlib.h> +#include "common.h" +#include "structs.h" + +#include <string.h> +#include "specrec.h" +#include "filtbank.h" +#include "syntax.h" +#include "iq_table.h" +#include "ms.h" +#include "is.h" +#include "pns.h" +#include "tns.h" +#include "drc.h" +#include "lt_predict.h" +#include "ic_predict.h" +#ifdef SSR_DEC +#include "ssr.h" +#include "ssr_fb.h" +#endif + + +/* static function declarations */ +static uint8_t quant_to_spec(NeAACDecStruct *hDecoder, + ic_stream *ics, int16_t *quant_data, + real_t *spec_data, uint16_t frame_len); + + +#ifdef LD_DEC +ALIGN static const uint8_t num_swb_512_window[] = { + 0, 0, 0, 36, 36, 37, 31, 31, 0, 0, 0, 0 +}; +ALIGN static const uint8_t num_swb_480_window[] = { + 0, 0, 0, 35, 35, 37, 30, 30, 0, 0, 0, 0 +}; +#endif + +ALIGN static const uint8_t num_swb_960_window[] = { + 40, 40, 45, 49, 49, 49, 46, 46, 42, 42, 42, 40 +}; + +ALIGN static const uint8_t num_swb_1024_window[] = { + 41, 41, 47, 49, 49, 51, 47, 47, 43, 43, 43, 40 +}; + +ALIGN static const uint8_t num_swb_128_window[] = { + 12, 12, 12, 14, 14, 14, 15, 15, 15, 15, 15, 15 +}; + +ALIGN static const uint16_t swb_offset_1024_96[] = { + 0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, + 64, 72, 80, 88, 96, 108, 120, 132, 144, 156, 172, 188, 212, 240, + 276, 320, 384, 448, 512, 576, 640, 704, 768, 832, 896, 960, 1024 +}; + +ALIGN static const uint16_t swb_offset_128_96[] = { + 0, 4, 8, 12, 16, 20, 24, 32, 40, 48, 64, 92, 128 +}; + +ALIGN static const uint16_t swb_offset_1024_64[] = { + 0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, + 64, 72, 80, 88, 100, 112, 124, 140, 156, 172, 192, 216, 240, 268, + 304, 344, 384, 424, 464, 504, 544, 584, 624, 664, 704, 744, 784, 824, + 864, 904, 944, 984, 1024 +}; + +ALIGN static const uint16_t swb_offset_128_64[] = { + 0, 4, 8, 12, 16, 20, 24, 32, 40, 48, 64, 92, 128 +}; + +ALIGN static const uint16_t swb_offset_1024_48[] = { + 0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 48, 56, 64, 72, + 80, 88, 96, 108, 120, 132, 144, 160, 176, 196, 216, 240, 264, 292, + 320, 352, 384, 416, 448, 480, 512, 544, 576, 608, 640, 672, 704, 736, + 768, 800, 832, 864, 896, 928, 1024 +}; + +#ifdef LD_DEC +ALIGN static const uint16_t swb_offset_512_48[] = { + 0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, 68, 76, 84, + 92, 100, 112, 124, 136, 148, 164, 184, 208, 236, 268, 300, 332, 364, 396, + 428, 460, 512 +}; + +ALIGN static const uint16_t swb_offset_480_48[] = { + 0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 64, 72 , 80 , 88, + 96, 108, 120, 132, 144, 156, 172, 188, 212, 240, 272, 304, 336, 368, 400, + 432, 480 +}; +#endif + +ALIGN static const uint16_t swb_offset_128_48[] = { + 0, 4, 8, 12, 16, 20, 28, 36, 44, 56, 68, 80, 96, 112, 128 +}; + +ALIGN static const uint16_t swb_offset_1024_32[] = { + 0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 48, 56, 64, 72, + 80, 88, 96, 108, 120, 132, 144, 160, 176, 196, 216, 240, 264, 292, + 320, 352, 384, 416, 448, 480, 512, 544, 576, 608, 640, 672, 704, 736, + 768, 800, 832, 864, 896, 928, 960, 992, 1024 +}; + +#ifdef LD_DEC +ALIGN static const uint16_t swb_offset_512_32[] = { + 0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 64, 72, 80, + 88, 96, 108, 120, 132, 144, 160, 176, 192, 212, 236, 260, 288, 320, 352, + 384, 416, 448, 480, 512 +}; + +ALIGN static const uint16_t swb_offset_480_32[] = { + 0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, 64, 72, 80, + 88, 96, 104, 112, 124, 136, 148, 164, 180, 200, 224, 256, 288, 320, 352, + 384, 416, 448, 480 +}; +#endif + +ALIGN static const uint16_t swb_offset_1024_24[] = { + 0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 52, 60, 68, + 76, 84, 92, 100, 108, 116, 124, 136, 148, 160, 172, 188, 204, 220, + 240, 260, 284, 308, 336, 364, 396, 432, 468, 508, 552, 600, 652, 704, + 768, 832, 896, 960, 1024 +}; + +#ifdef LD_DEC +ALIGN static const uint16_t swb_offset_512_24[] = { + 0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 52, 60, 68, + 80, 92, 104, 120, 140, 164, 192, 224, 256, 288, 320, 352, 384, 416, + 448, 480, 512 +}; + +ALIGN static const uint16_t swb_offset_480_24[] = { + 0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 52, 60, 68, 80, 92, 104, 120, + 140, 164, 192, 224, 256, 288, 320, 352, 384, 416, 448, 480 +}; +#endif + +ALIGN static const uint16_t swb_offset_128_24[] = { + 0, 4, 8, 12, 16, 20, 24, 28, 36, 44, 52, 64, 76, 92, 108, 128 +}; + +ALIGN static const uint16_t swb_offset_1024_16[] = { + 0, 8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 88, 100, 112, 124, + 136, 148, 160, 172, 184, 196, 212, 228, 244, 260, 280, 300, 320, 344, + 368, 396, 424, 456, 492, 532, 572, 616, 664, 716, 772, 832, 896, 960, 1024 +}; + +ALIGN static const uint16_t swb_offset_128_16[] = { + 0, 4, 8, 12, 16, 20, 24, 28, 32, 40, 48, 60, 72, 88, 108, 128 +}; + +ALIGN static const uint16_t swb_offset_1024_8[] = { + 0, 12, 24, 36, 48, 60, 72, 84, 96, 108, 120, 132, 144, 156, 172, + 188, 204, 220, 236, 252, 268, 288, 308, 328, 348, 372, 396, 420, 448, + 476, 508, 544, 580, 620, 664, 712, 764, 820, 880, 944, 1024 +}; + +ALIGN static const uint16_t swb_offset_128_8[] = { + 0, 4, 8, 12, 16, 20, 24, 28, 36, 44, 52, 60, 72, 88, 108, 128 +}; + +ALIGN static const uint16_t *swb_offset_1024_window[] = { + swb_offset_1024_96, /* 96000 */ + swb_offset_1024_96, /* 88200 */ + swb_offset_1024_64, /* 64000 */ + swb_offset_1024_48, /* 48000 */ + swb_offset_1024_48, /* 44100 */ + swb_offset_1024_32, /* 32000 */ + swb_offset_1024_24, /* 24000 */ + swb_offset_1024_24, /* 22050 */ + swb_offset_1024_16, /* 16000 */ + swb_offset_1024_16, /* 12000 */ + swb_offset_1024_16, /* 11025 */ + swb_offset_1024_8 /* 8000 */ +}; + +#ifdef LD_DEC +ALIGN static const uint16_t *swb_offset_512_window[] = { + 0, /* 96000 */ + 0, /* 88200 */ + 0, /* 64000 */ + swb_offset_512_48, /* 48000 */ + swb_offset_512_48, /* 44100 */ + swb_offset_512_32, /* 32000 */ + swb_offset_512_24, /* 24000 */ + swb_offset_512_24, /* 22050 */ + 0, /* 16000 */ + 0, /* 12000 */ + 0, /* 11025 */ + 0 /* 8000 */ +}; + +ALIGN static const uint16_t *swb_offset_480_window[] = { + 0, /* 96000 */ + 0, /* 88200 */ + 0, /* 64000 */ + swb_offset_480_48, /* 48000 */ + swb_offset_480_48, /* 44100 */ + swb_offset_480_32, /* 32000 */ + swb_offset_480_24, /* 24000 */ + swb_offset_480_24, /* 22050 */ + 0, /* 16000 */ + 0, /* 12000 */ + 0, /* 11025 */ + 0 /* 8000 */ +}; +#endif + +ALIGN static const uint16_t *swb_offset_128_window[] = { + swb_offset_128_96, /* 96000 */ + swb_offset_128_96, /* 88200 */ + swb_offset_128_64, /* 64000 */ + swb_offset_128_48, /* 48000 */ + swb_offset_128_48, /* 44100 */ + swb_offset_128_48, /* 32000 */ + swb_offset_128_24, /* 24000 */ + swb_offset_128_24, /* 22050 */ + swb_offset_128_16, /* 16000 */ + swb_offset_128_16, /* 12000 */ + swb_offset_128_16, /* 11025 */ + swb_offset_128_8 /* 8000 */ +}; + +#define bit_set(A, B) ((A) & (1<<(B))) + +/* 4.5.2.3.4 */ +/* + - determine the number of windows in a window_sequence named num_windows + - determine the number of window_groups named num_window_groups + - determine the number of windows in each group named window_group_length[g] + - determine the total number of scalefactor window bands named num_swb for + the actual window type + - determine swb_offset[swb], the offset of the first coefficient in + scalefactor window band named swb of the window actually used + - determine sect_sfb_offset[g][section],the offset of the first coefficient + in section named section. This offset depends on window_sequence and + scale_factor_grouping and is needed to decode the spectral_data(). +*/ +uint8_t window_grouping_info(NeAACDecStruct *hDecoder, ic_stream *ics) +{ + uint8_t i, g; + + uint8_t sf_index = hDecoder->sf_index; + + switch (ics->window_sequence) { + case ONLY_LONG_SEQUENCE: + case LONG_START_SEQUENCE: + case LONG_STOP_SEQUENCE: + ics->num_windows = 1; + ics->num_window_groups = 1; + ics->window_group_length[ics->num_window_groups - 1] = 1; +#ifdef LD_DEC + if (hDecoder->object_type == LD) { + if (hDecoder->frameLength == 512) { + ics->num_swb = num_swb_512_window[sf_index]; + } else { /* if (hDecoder->frameLength == 480) */ + ics->num_swb = num_swb_480_window[sf_index]; + } + } else { +#endif + if (hDecoder->frameLength == 1024) { + ics->num_swb = num_swb_1024_window[sf_index]; + } else { /* if (hDecoder->frameLength == 960) */ + ics->num_swb = num_swb_960_window[sf_index]; + } +#ifdef LD_DEC + } +#endif + + if (ics->max_sfb > ics->num_swb) { + return 32; + } + + /* preparation of sect_sfb_offset for long blocks */ + /* also copy the last value! */ +#ifdef LD_DEC + if (hDecoder->object_type == LD) { + if (hDecoder->frameLength == 512) { + for (i = 0; i < ics->num_swb; i++) { + ics->sect_sfb_offset[0][i] = swb_offset_512_window[sf_index][i]; + ics->swb_offset[i] = swb_offset_512_window[sf_index][i]; + } + } else { /* if (hDecoder->frameLength == 480) */ + for (i = 0; i < ics->num_swb; i++) { + ics->sect_sfb_offset[0][i] = swb_offset_480_window[sf_index][i]; + ics->swb_offset[i] = swb_offset_480_window[sf_index][i]; + } + } + ics->sect_sfb_offset[0][ics->num_swb] = hDecoder->frameLength; + ics->swb_offset[ics->num_swb] = hDecoder->frameLength; + ics->swb_offset_max = hDecoder->frameLength; + } else { +#endif + for (i = 0; i < ics->num_swb; i++) { + ics->sect_sfb_offset[0][i] = swb_offset_1024_window[sf_index][i]; + ics->swb_offset[i] = swb_offset_1024_window[sf_index][i]; + } + ics->sect_sfb_offset[0][ics->num_swb] = hDecoder->frameLength; + ics->swb_offset[ics->num_swb] = hDecoder->frameLength; + ics->swb_offset_max = hDecoder->frameLength; +#ifdef LD_DEC + } +#endif + return 0; + case EIGHT_SHORT_SEQUENCE: + ics->num_windows = 8; + ics->num_window_groups = 1; + ics->window_group_length[ics->num_window_groups - 1] = 1; + ics->num_swb = num_swb_128_window[sf_index]; + + if (ics->max_sfb > ics->num_swb) { + return 32; + } + + for (i = 0; i < ics->num_swb; i++) { + ics->swb_offset[i] = swb_offset_128_window[sf_index][i]; + } + ics->swb_offset[ics->num_swb] = hDecoder->frameLength / 8; + ics->swb_offset_max = hDecoder->frameLength / 8; + + for (i = 0; i < ics->num_windows - 1; i++) { + if (bit_set(ics->scale_factor_grouping, 6 - i) == 0) { + ics->num_window_groups += 1; + ics->window_group_length[ics->num_window_groups - 1] = 1; + } else { + ics->window_group_length[ics->num_window_groups - 1] += 1; + } + } + + /* preparation of sect_sfb_offset for short blocks */ + for (g = 0; g < ics->num_window_groups; g++) { + uint16_t width; + uint8_t sect_sfb = 0; + uint16_t offset = 0; + + for (i = 0; i < ics->num_swb; i++) { + if (i + 1 == ics->num_swb) { + width = (hDecoder->frameLength / 8) - swb_offset_128_window[sf_index][i]; + } else { + width = swb_offset_128_window[sf_index][i + 1] - + swb_offset_128_window[sf_index][i]; + } + width *= ics->window_group_length[g]; + ics->sect_sfb_offset[g][sect_sfb++] = offset; + offset += width; + } + ics->sect_sfb_offset[g][sect_sfb] = offset; + } + return 0; + default: + return 32; + } +} + +/* iquant() * +/* output = sign(input)*abs(input)^(4/3) */ +/**/ +static INLINE real_t iquant(int16_t q, const real_t *tab, uint8_t *error) +{ +#ifdef FIXED_POINT + /* For FIXED_POINT the iq_table is prescaled by 3 bits (iq_table[]/8) */ + /* BIG_IQ_TABLE allows you to use the full 8192 value table, if this is not + * defined a 1026 value table and interpolation will be used + */ +#ifndef BIG_IQ_TABLE + static const real_t errcorr[] = { + REAL_CONST(0), REAL_CONST(1.0 / 8.0), REAL_CONST(2.0 / 8.0), REAL_CONST(3.0 / 8.0), + REAL_CONST(4.0 / 8.0), REAL_CONST(5.0 / 8.0), REAL_CONST(6.0 / 8.0), REAL_CONST(7.0 / 8.0), + REAL_CONST(0) + }; + real_t x1, x2; +#endif + int16_t sgn = 1; + + if (q < 0) { + q = -q; + sgn = -1; + } + + if (q < IQ_TABLE_SIZE) { + //#define IQUANT_PRINT +#ifdef IQUANT_PRINT + //printf("0x%.8X\n", sgn * tab[q]); + printf("%d\n", sgn * tab[q]); +#endif + return sgn * tab[q]; + } + +#ifndef BIG_IQ_TABLE + if (q >= 8192) { + *error = 17; + return 0; + } + + /* linear interpolation */ + x1 = tab[q >> 3]; + x2 = tab[(q >> 3) + 1]; + return sgn * 16 * (MUL_R(errcorr[q & 7], (x2 - x1)) + x1); +#else + *error = 17; + return 0; +#endif + +#else + if (q < 0) { + /* tab contains a value for all possible q [0,8192] */ + if (-q < IQ_TABLE_SIZE) { + return -tab[-q]; + } + + *error = 17; + return 0; + } else { + /* tab contains a value for all possible q [0,8192] */ + if (q < IQ_TABLE_SIZE) { + return tab[q]; + } + + *error = 17; + return 0; + } +#endif +} + +#ifndef FIXED_POINT +ALIGN static const real_t pow2sf_tab[] = { + 2.9802322387695313E-008, 5.9604644775390625E-008, 1.1920928955078125E-007, + 2.384185791015625E-007, 4.76837158203125E-007, 9.5367431640625E-007, + 1.9073486328125E-006, 3.814697265625E-006, 7.62939453125E-006, + 1.52587890625E-005, 3.0517578125E-005, 6.103515625E-005, + 0.0001220703125, 0.000244140625, 0.00048828125, + 0.0009765625, 0.001953125, 0.00390625, + 0.0078125, 0.015625, 0.03125, + 0.0625, 0.125, 0.25, + 0.5, 1.0, 2.0, + 4.0, 8.0, 16.0, 32.0, + 64.0, 128.0, 256.0, + 512.0, 1024.0, 2048.0, + 4096.0, 8192.0, 16384.0, + 32768.0, 65536.0, 131072.0, + 262144.0, 524288.0, 1048576.0, + 2097152.0, 4194304.0, 8388608.0, + 16777216.0, 33554432.0, 67108864.0, + 134217728.0, 268435456.0, 536870912.0, + 1073741824.0, 2147483648.0, 4294967296.0, + 8589934592.0, 17179869184.0, 34359738368.0, + 68719476736.0, 137438953472.0, 274877906944.0 +}; +#endif + +/* quant_to_spec: perform dequantisation and scaling + * and in case of short block it also does the deinterleaving + */ +/* + For ONLY_LONG_SEQUENCE windows (num_window_groups = 1, + window_group_length[0] = 1) the spectral data is in ascending spectral + order. + For the EIGHT_SHORT_SEQUENCE window, the spectral order depends on the + grouping in the following manner: + - Groups are ordered sequentially + - Within a group, a scalefactor band consists of the spectral data of all + grouped SHORT_WINDOWs for the associated scalefactor window band. To + clarify via example, the length of a group is in the range of one to eight + SHORT_WINDOWs. + - If there are eight groups each with length one (num_window_groups = 8, + window_group_length[0..7] = 1), the result is a sequence of eight spectra, + each in ascending spectral order. + - If there is only one group with length eight (num_window_groups = 1, + window_group_length[0] = 8), the result is that spectral data of all eight + SHORT_WINDOWs is interleaved by scalefactor window bands. + - Within a scalefactor window band, the coefficients are in ascending + spectral order. +*/ +static uint8_t quant_to_spec(NeAACDecStruct *hDecoder, + ic_stream *ics, int16_t *quant_data, + real_t *spec_data, uint16_t frame_len) +{ + ALIGN static const real_t pow2_table[] = { + COEF_CONST(1.0), + COEF_CONST(1.1892071150027210667174999705605), /* 2^0.25 */ + COEF_CONST(1.4142135623730950488016887242097), /* 2^0.5 */ + COEF_CONST(1.6817928305074290860622509524664) /* 2^0.75 */ + }; + const real_t *tab = iq_table; + + uint8_t g, sfb, win; + uint16_t width, bin, k, gindex, wa, wb; + uint8_t error = 0; /* Init error flag */ +#ifndef FIXED_POINT + real_t scf; +#endif + + k = 0; + gindex = 0; + + for (g = 0; g < ics->num_window_groups; g++) { + uint16_t j = 0; + uint16_t gincrease = 0; + uint16_t win_inc = ics->swb_offset[ics->num_swb]; + + for (sfb = 0; sfb < ics->num_swb; sfb++) { + int32_t exp, frac; + + width = ics->swb_offset[sfb + 1] - ics->swb_offset[sfb]; + + /* this could be scalefactor for IS or PNS, those can be negative or bigger then 255 */ + /* just ignore them */ + if (ics->scale_factors[g][sfb] < 0 || ics->scale_factors[g][sfb] > 255) { + exp = 0; + frac = 0; + } else { + /* ics->scale_factors[g][sfb] must be between 0 and 255 */ + exp = (ics->scale_factors[g][sfb] /* - 100 */) >> 2; + /* frac must always be > 0 */ + frac = (ics->scale_factors[g][sfb] /* - 100 */) & 3; + } + +#ifdef FIXED_POINT + exp -= 25; + /* IMDCT pre-scaling */ + if (hDecoder->object_type == LD) { + exp -= 6 /*9*/; + } else { + if (ics->window_sequence == EIGHT_SHORT_SEQUENCE) { + exp -= 4 /*7*/; + } else { + exp -= 7 /*10*/; + } + } +#endif + + wa = gindex + j; + +#ifndef FIXED_POINT + scf = pow2sf_tab[exp/*+25*/] * pow2_table[frac]; +#endif + + for (win = 0; win < ics->window_group_length[g]; win++) { + for (bin = 0; bin < width; bin += 4) { +#ifndef FIXED_POINT + wb = wa + bin; + + spec_data[wb + 0] = iquant(quant_data[k + 0], tab, &error) * scf; + spec_data[wb + 1] = iquant(quant_data[k + 1], tab, &error) * scf; + spec_data[wb + 2] = iquant(quant_data[k + 2], tab, &error) * scf; + spec_data[wb + 3] = iquant(quant_data[k + 3], tab, &error) * scf; + +#else + real_t iq0 = iquant(quant_data[k + 0], tab, &error); + real_t iq1 = iquant(quant_data[k + 1], tab, &error); + real_t iq2 = iquant(quant_data[k + 2], tab, &error); + real_t iq3 = iquant(quant_data[k + 3], tab, &error); + + wb = wa + bin; + + if (exp < 0) { + spec_data[wb + 0] = iq0 >>= -exp; + spec_data[wb + 1] = iq1 >>= -exp; + spec_data[wb + 2] = iq2 >>= -exp; + spec_data[wb + 3] = iq3 >>= -exp; + } else { + spec_data[wb + 0] = iq0 <<= exp; + spec_data[wb + 1] = iq1 <<= exp; + spec_data[wb + 2] = iq2 <<= exp; + spec_data[wb + 3] = iq3 <<= exp; + } + if (frac != 0) { + spec_data[wb + 0] = MUL_C(spec_data[wb + 0], pow2_table[frac]); + spec_data[wb + 1] = MUL_C(spec_data[wb + 1], pow2_table[frac]); + spec_data[wb + 2] = MUL_C(spec_data[wb + 2], pow2_table[frac]); + spec_data[wb + 3] = MUL_C(spec_data[wb + 3], pow2_table[frac]); + } + + //#define SCFS_PRINT +#ifdef SCFS_PRINT + printf("%d\n", spec_data[gindex + (win * win_inc) + j + bin + 0]); + printf("%d\n", spec_data[gindex + (win * win_inc) + j + bin + 1]); + printf("%d\n", spec_data[gindex + (win * win_inc) + j + bin + 2]); + printf("%d\n", spec_data[gindex + (win * win_inc) + j + bin + 3]); + //printf("0x%.8X\n", spec_data[gindex+(win*win_inc)+j+bin+0]); + //printf("0x%.8X\n", spec_data[gindex+(win*win_inc)+j+bin+1]); + //printf("0x%.8X\n", spec_data[gindex+(win*win_inc)+j+bin+2]); + //printf("0x%.8X\n", spec_data[gindex+(win*win_inc)+j+bin+3]); +#endif +#endif + + gincrease += 4; + k += 4; + } + wa += win_inc; + } + j += width; + } + gindex += gincrease; + } + + return error; +} + +static uint8_t allocate_single_channel(NeAACDecStruct *hDecoder, uint8_t channel, + uint8_t output_channels) +{ + int mul = 1; + +#ifdef MAIN_DEC + /* MAIN object type prediction */ + if (hDecoder->object_type == MAIN) { + /* allocate the state only when needed */ + if (hDecoder->pred_stat[channel] != NULL) { + faad_free(hDecoder->pred_stat[channel]); + hDecoder->pred_stat[channel] = NULL; + } + + hDecoder->pred_stat[channel] = (pred_state*)faad_malloc(hDecoder->frameLength * sizeof(pred_state)); + reset_all_predictors(hDecoder->pred_stat[channel], hDecoder->frameLength); + } +#endif + +#ifdef LTP_DEC + if (is_ltp_ot(hDecoder->object_type)) { + /* allocate the state only when needed */ + if (hDecoder->lt_pred_stat[channel] != NULL) { + faad_free(hDecoder->lt_pred_stat[channel]); + hDecoder->lt_pred_stat[channel] = NULL; + } + + hDecoder->lt_pred_stat[channel] = (int16_t*)faad_malloc(hDecoder->frameLength * 4 * sizeof(int16_t)); + memset(hDecoder->lt_pred_stat[channel], 0, hDecoder->frameLength * 4 * sizeof(int16_t)); + } +#endif + + if (hDecoder->time_out[channel] != NULL) { + faad_free(hDecoder->time_out[channel]); + hDecoder->time_out[channel] = NULL; + } + + { + mul = 1; +#ifdef SBR_DEC + hDecoder->sbr_alloced[hDecoder->fr_ch_ele] = 0; + if ((hDecoder->sbr_present_flag == 1) || (hDecoder->forceUpSampling == 1)) { + /* SBR requires 2 times as much output data */ + mul = 2; + hDecoder->sbr_alloced[hDecoder->fr_ch_ele] = 1; + } +#endif + hDecoder->time_out[channel] = (real_t*)faad_malloc(mul * hDecoder->frameLength * sizeof(real_t)); + memset(hDecoder->time_out[channel], 0, mul * hDecoder->frameLength * sizeof(real_t)); + } + +#if (defined(PS_DEC) || defined(DRM_PS)) + if (output_channels == 2) { + if (hDecoder->time_out[channel + 1] != NULL) { + faad_free(hDecoder->time_out[channel + 1]); + hDecoder->time_out[channel + 1] = NULL; + } + + hDecoder->time_out[channel + 1] = (real_t*)faad_malloc(mul * hDecoder->frameLength * sizeof(real_t)); + memset(hDecoder->time_out[channel + 1], 0, mul * hDecoder->frameLength * sizeof(real_t)); + } +#endif + + if (hDecoder->fb_intermed[channel] != NULL) { + faad_free(hDecoder->fb_intermed[channel]); + hDecoder->fb_intermed[channel] = NULL; + } + + hDecoder->fb_intermed[channel] = (real_t*)faad_malloc(hDecoder->frameLength * sizeof(real_t)); + memset(hDecoder->fb_intermed[channel], 0, hDecoder->frameLength * sizeof(real_t)); + +#ifdef SSR_DEC + if (hDecoder->object_type == SSR) { + if (hDecoder->ssr_overlap[channel] == NULL) { + hDecoder->ssr_overlap[channel] = (real_t*)faad_malloc(2 * hDecoder->frameLength * sizeof(real_t)); + memset(hDecoder->ssr_overlap[channel], 0, 2 * hDecoder->frameLength * sizeof(real_t)); + } + if (hDecoder->prev_fmd[channel] == NULL) { + uint16_t k; + hDecoder->prev_fmd[channel] = (real_t*)faad_malloc(2 * hDecoder->frameLength * sizeof(real_t)); + for (k = 0; k < 2 * hDecoder->frameLength; k++) { + hDecoder->prev_fmd[channel][k] = REAL_CONST(-1); + } + } + } +#endif + + return 0; +} + +static uint8_t allocate_channel_pair(NeAACDecStruct *hDecoder, + uint8_t channel, uint8_t paired_channel) +{ + int mul = 1; + +#ifdef MAIN_DEC + /* MAIN object type prediction */ + if (hDecoder->object_type == MAIN) { + /* allocate the state only when needed */ + if (hDecoder->pred_stat[channel] == NULL) { + hDecoder->pred_stat[channel] = (pred_state*)faad_malloc(hDecoder->frameLength * sizeof(pred_state)); + reset_all_predictors(hDecoder->pred_stat[channel], hDecoder->frameLength); + } + if (hDecoder->pred_stat[paired_channel] == NULL) { + hDecoder->pred_stat[paired_channel] = (pred_state*)faad_malloc(hDecoder->frameLength * sizeof(pred_state)); + reset_all_predictors(hDecoder->pred_stat[paired_channel], hDecoder->frameLength); + } + } +#endif + +#ifdef LTP_DEC + if (is_ltp_ot(hDecoder->object_type)) { + /* allocate the state only when needed */ + if (hDecoder->lt_pred_stat[channel] == NULL) { + hDecoder->lt_pred_stat[channel] = (int16_t*)faad_malloc(hDecoder->frameLength * 4 * sizeof(int16_t)); + memset(hDecoder->lt_pred_stat[channel], 0, hDecoder->frameLength * 4 * sizeof(int16_t)); + } + if (hDecoder->lt_pred_stat[paired_channel] == NULL) { + hDecoder->lt_pred_stat[paired_channel] = (int16_t*)faad_malloc(hDecoder->frameLength * 4 * sizeof(int16_t)); + memset(hDecoder->lt_pred_stat[paired_channel], 0, hDecoder->frameLength * 4 * sizeof(int16_t)); + } + } +#endif + + if (hDecoder->time_out[channel] == NULL) { + mul = 1; +#ifdef SBR_DEC + hDecoder->sbr_alloced[hDecoder->fr_ch_ele] = 0; + if ((hDecoder->sbr_present_flag == 1) || (hDecoder->forceUpSampling == 1)) { + /* SBR requires 2 times as much output data */ + mul = 2; + hDecoder->sbr_alloced[hDecoder->fr_ch_ele] = 1; + } +#endif + hDecoder->time_out[channel] = (real_t*)faad_malloc(mul * hDecoder->frameLength * sizeof(real_t)); + memset(hDecoder->time_out[channel], 0, mul * hDecoder->frameLength * sizeof(real_t)); + } + if (hDecoder->time_out[paired_channel] == NULL) { + hDecoder->time_out[paired_channel] = (real_t*)faad_malloc(mul * hDecoder->frameLength * sizeof(real_t)); + memset(hDecoder->time_out[paired_channel], 0, mul * hDecoder->frameLength * sizeof(real_t)); + } + + if (hDecoder->fb_intermed[channel] == NULL) { + hDecoder->fb_intermed[channel] = (real_t*)faad_malloc(hDecoder->frameLength * sizeof(real_t)); + memset(hDecoder->fb_intermed[channel], 0, hDecoder->frameLength * sizeof(real_t)); + } + if (hDecoder->fb_intermed[paired_channel] == NULL) { + hDecoder->fb_intermed[paired_channel] = (real_t*)faad_malloc(hDecoder->frameLength * sizeof(real_t)); + memset(hDecoder->fb_intermed[paired_channel], 0, hDecoder->frameLength * sizeof(real_t)); + } + +#ifdef SSR_DEC + if (hDecoder->object_type == SSR) { + if (hDecoder->ssr_overlap[cpe->channel] == NULL) { + hDecoder->ssr_overlap[cpe->channel] = (real_t*)faad_malloc(2 * hDecoder->frameLength * sizeof(real_t)); + memset(hDecoder->ssr_overlap[cpe->channel], 0, 2 * hDecoder->frameLength * sizeof(real_t)); + } + if (hDecoder->ssr_overlap[cpe->paired_channel] == NULL) { + hDecoder->ssr_overlap[cpe->paired_channel] = (real_t*)faad_malloc(2 * hDecoder->frameLength * sizeof(real_t)); + memset(hDecoder->ssr_overlap[cpe->paired_channel], 0, 2 * hDecoder->frameLength * sizeof(real_t)); + } + if (hDecoder->prev_fmd[cpe->channel] == NULL) { + uint16_t k; + hDecoder->prev_fmd[cpe->channel] = (real_t*)faad_malloc(2 * hDecoder->frameLength * sizeof(real_t)); + for (k = 0; k < 2 * hDecoder->frameLength; k++) { + hDecoder->prev_fmd[cpe->channel][k] = REAL_CONST(-1); + } + } + if (hDecoder->prev_fmd[cpe->paired_channel] == NULL) { + uint16_t k; + hDecoder->prev_fmd[cpe->paired_channel] = (real_t*)faad_malloc(2 * hDecoder->frameLength * sizeof(real_t)); + for (k = 0; k < 2 * hDecoder->frameLength; k++) { + hDecoder->prev_fmd[cpe->paired_channel][k] = REAL_CONST(-1); + } + } + } +#endif + + return 0; +} + +uint8_t reconstruct_single_channel(NeAACDecStruct *hDecoder, ic_stream *ics, + element *sce, int16_t *spec_data) +{ + uint8_t retval; + int output_channels; + ALIGN real_t spec_coef[1024]; + +#ifdef PROFILE + int64_t count = faad_get_ts(); +#endif + + + /* always allocate 2 channels, PS can always "suddenly" turn up */ +#if ( (defined(DRM) && defined(DRM_PS)) ) + output_channels = 2; +#elif defined(PS_DEC) + if (hDecoder->ps_used[hDecoder->fr_ch_ele]) { + output_channels = 2; + } else { + output_channels = 1; + } +#else + output_channels = 1; +#endif + + if (hDecoder->element_output_channels[hDecoder->fr_ch_ele] == 0) { + /* element_output_channels not set yet */ + hDecoder->element_output_channels[hDecoder->fr_ch_ele] = output_channels; + } else if (hDecoder->element_output_channels[hDecoder->fr_ch_ele] != output_channels) { + /* element inconsistency */ + + /* this only happens if PS is actually found but not in the first frame + * this means that there is only 1 bitstream element! + */ + + /* reset the allocation */ + hDecoder->element_alloced[hDecoder->fr_ch_ele] = 0; + + hDecoder->element_output_channels[hDecoder->fr_ch_ele] = output_channels; + + //return 21; + } + + if (hDecoder->element_alloced[hDecoder->fr_ch_ele] == 0) { + retval = allocate_single_channel(hDecoder, sce->channel, output_channels); + if (retval > 0) { + return retval; + } + + hDecoder->element_alloced[hDecoder->fr_ch_ele] = 1; + } + + + /* dequantisation and scaling */ + retval = quant_to_spec(hDecoder, ics, spec_data, spec_coef, hDecoder->frameLength); + if (retval > 0) { + return retval; + } + +#ifdef PROFILE + count = faad_get_ts() - count; + hDecoder->requant_cycles += count; +#endif + + + /* pns decoding */ + pns_decode(ics, NULL, spec_coef, NULL, hDecoder->frameLength, 0, hDecoder->object_type, + &(hDecoder->__r1), &(hDecoder->__r2)); + +#ifdef MAIN_DEC + /* MAIN object type prediction */ + if (hDecoder->object_type == MAIN) { + if (!hDecoder->pred_stat[sce->channel]) { + return 33; + } + + /* intra channel prediction */ + ic_prediction(ics, spec_coef, hDecoder->pred_stat[sce->channel], hDecoder->frameLength, + hDecoder->sf_index); + + /* In addition, for scalefactor bands coded by perceptual + noise substitution the predictors belonging to the + corresponding spectral coefficients are reset. + */ + pns_reset_pred_state(ics, hDecoder->pred_stat[sce->channel]); + } +#endif + +#ifdef LTP_DEC + if (is_ltp_ot(hDecoder->object_type)) { +#ifdef LD_DEC + if (hDecoder->object_type == LD) { + if (ics->ltp.data_present) { + if (ics->ltp.lag_update) { + hDecoder->ltp_lag[sce->channel] = ics->ltp.lag; + } + } + ics->ltp.lag = hDecoder->ltp_lag[sce->channel]; + } +#endif + + /* long term prediction */ + lt_prediction(ics, &(ics->ltp), spec_coef, hDecoder->lt_pred_stat[sce->channel], hDecoder->fb, + ics->window_shape, hDecoder->window_shape_prev[sce->channel], + hDecoder->sf_index, hDecoder->object_type, hDecoder->frameLength); + } +#endif + + /* tns decoding */ + tns_decode_frame(ics, &(ics->tns), hDecoder->sf_index, hDecoder->object_type, + spec_coef, hDecoder->frameLength); + + /* drc decoding */ + if (hDecoder->drc->present) { + if (!hDecoder->drc->exclude_mask[sce->channel] || !hDecoder->drc->excluded_chns_present) { + drc_decode(hDecoder->drc, spec_coef); + } + } + + /* filter bank */ +#ifdef SSR_DEC + if (hDecoder->object_type != SSR) { +#endif + ifilter_bank(hDecoder->fb, ics->window_sequence, ics->window_shape, + hDecoder->window_shape_prev[sce->channel], spec_coef, + hDecoder->time_out[sce->channel], hDecoder->fb_intermed[sce->channel], + hDecoder->object_type, hDecoder->frameLength); +#ifdef SSR_DEC + } else { + ssr_decode(&(ics->ssr), hDecoder->fb, ics->window_sequence, ics->window_shape, + hDecoder->window_shape_prev[sce->channel], spec_coef, hDecoder->time_out[sce->channel], + hDecoder->ssr_overlap[sce->channel], hDecoder->ipqf_buffer[sce->channel], hDecoder->prev_fmd[sce->channel], + hDecoder->frameLength); + } +#endif + + /* save window shape for next frame */ + hDecoder->window_shape_prev[sce->channel] = ics->window_shape; + +#ifdef LTP_DEC + if (is_ltp_ot(hDecoder->object_type)) { + lt_update_state(hDecoder->lt_pred_stat[sce->channel], hDecoder->time_out[sce->channel], + hDecoder->fb_intermed[sce->channel], hDecoder->frameLength, hDecoder->object_type); + } +#endif + +#ifdef SBR_DEC + if (((hDecoder->sbr_present_flag == 1) || (hDecoder->forceUpSampling == 1)) + && hDecoder->sbr_alloced[hDecoder->fr_ch_ele]) { + int ele = hDecoder->fr_ch_ele; + int ch = sce->channel; + + /* following case can happen when forceUpSampling == 1 */ + if (hDecoder->sbr[ele] == NULL) { + hDecoder->sbr[ele] = sbrDecodeInit(hDecoder->frameLength, + hDecoder->element_id[ele], 2 * get_sample_rate(hDecoder->sf_index), + hDecoder->downSampledSBR +#ifdef DRM + , 0 +#endif + ); + } + + if (sce->ics1.window_sequence == EIGHT_SHORT_SEQUENCE) { + hDecoder->sbr[ele]->maxAACLine = 8 * min(sce->ics1.swb_offset[max(sce->ics1.max_sfb - 1, 0)], sce->ics1.swb_offset_max); + } else { + hDecoder->sbr[ele]->maxAACLine = min(sce->ics1.swb_offset[max(sce->ics1.max_sfb - 1, 0)], sce->ics1.swb_offset_max); + } + + /* check if any of the PS tools is used */ +#if (defined(PS_DEC) || defined(DRM_PS)) + if (hDecoder->ps_used[ele] == 0) { +#endif + retval = sbrDecodeSingleFrame(hDecoder->sbr[ele], hDecoder->time_out[ch], + hDecoder->postSeekResetFlag, hDecoder->downSampledSBR); +#if (defined(PS_DEC) || defined(DRM_PS)) + } else { + retval = sbrDecodeSingleFramePS(hDecoder->sbr[ele], hDecoder->time_out[ch], + hDecoder->time_out[ch + 1], hDecoder->postSeekResetFlag, + hDecoder->downSampledSBR); + } +#endif + if (retval > 0) { + return retval; + } + } else if (((hDecoder->sbr_present_flag == 1) || (hDecoder->forceUpSampling == 1)) + && !hDecoder->sbr_alloced[hDecoder->fr_ch_ele]) { + return 23; + } +#endif + + /* copy L to R when no PS is used */ +#if (defined(PS_DEC) || defined(DRM_PS)) + if ((hDecoder->ps_used[hDecoder->fr_ch_ele] == 0) && + (hDecoder->element_output_channels[hDecoder->fr_ch_ele] == 2)) { + int ele = hDecoder->fr_ch_ele; + int ch = sce->channel; + int frame_size = (hDecoder->sbr_alloced[ele]) ? 2 : 1; + frame_size *= hDecoder->frameLength * sizeof(real_t); + + memcpy(hDecoder->time_out[ch + 1], hDecoder->time_out[ch], frame_size); + } +#endif + + return 0; +} + +uint8_t reconstruct_channel_pair(NeAACDecStruct *hDecoder, ic_stream *ics1, ic_stream *ics2, + element *cpe, int16_t *spec_data1, int16_t *spec_data2) +{ + uint8_t retval; + ALIGN real_t spec_coef1[1024]; + ALIGN real_t spec_coef2[1024]; + +#ifdef PROFILE + int64_t count = faad_get_ts(); +#endif + if (hDecoder->element_alloced[hDecoder->fr_ch_ele] == 0) { + retval = allocate_channel_pair(hDecoder, cpe->channel, (uint8_t)cpe->paired_channel); + if (retval > 0) { + return retval; + } + + hDecoder->element_alloced[hDecoder->fr_ch_ele] = 1; + } else { + // 1ch --> 2ch aac stream, channel configuration mapping changed ,need reset decoder .mostly happened when channel num changed + if (hDecoder->fb_intermed[(uint8_t)cpe->paired_channel] == NULL) { + audio_codec_print("channel configure changed,need re-alloc the buffer\n"); + return 34; + } + } + + /* dequantisation and scaling */ + retval = quant_to_spec(hDecoder, ics1, spec_data1, spec_coef1, hDecoder->frameLength); + if (retval > 0) { + return retval; + } + retval = quant_to_spec(hDecoder, ics2, spec_data2, spec_coef2, hDecoder->frameLength); + if (retval > 0) { + return retval; + } + +#ifdef PROFILE + count = faad_get_ts() - count; + hDecoder->requant_cycles += count; +#endif + + + /* pns decoding */ + if (ics1->ms_mask_present) { + pns_decode(ics1, ics2, spec_coef1, spec_coef2, hDecoder->frameLength, 1, hDecoder->object_type, + &(hDecoder->__r1), &(hDecoder->__r2)); + } else { + pns_decode(ics1, NULL, spec_coef1, NULL, hDecoder->frameLength, 0, hDecoder->object_type, + &(hDecoder->__r1), &(hDecoder->__r2)); + pns_decode(ics2, NULL, spec_coef2, NULL, hDecoder->frameLength, 0, hDecoder->object_type, + &(hDecoder->__r1), &(hDecoder->__r2)); + } + + /* mid/side decoding */ + ms_decode(ics1, ics2, spec_coef1, spec_coef2, hDecoder->frameLength); + +#if 0 + { + int i; + for (i = 0; i < 1024; i++) { + //printf("%d\n", spec_coef1[i]); + printf("0x%.8X\n", spec_coef1[i]); + } + for (i = 0; i < 1024; i++) { + //printf("%d\n", spec_coef2[i]); + printf("0x%.8X\n", spec_coef2[i]); + } + } +#endif + + /* intensity stereo decoding */ + is_decode(ics1, ics2, spec_coef1, spec_coef2, hDecoder->frameLength); + +#if 0 + { + int i; + for (i = 0; i < 1024; i++) { + printf("%d\n", spec_coef1[i]); + //printf("0x%.8X\n", spec_coef1[i]); + } + for (i = 0; i < 1024; i++) { + printf("%d\n", spec_coef2[i]); + //printf("0x%.8X\n", spec_coef2[i]); + } + } +#endif + +#ifdef MAIN_DEC + /* MAIN object type prediction */ + if (hDecoder->object_type == MAIN) { + /* intra channel prediction */ + ic_prediction(ics1, spec_coef1, hDecoder->pred_stat[cpe->channel], hDecoder->frameLength, + hDecoder->sf_index); + ic_prediction(ics2, spec_coef2, hDecoder->pred_stat[cpe->paired_channel], hDecoder->frameLength, + hDecoder->sf_index); + + /* In addition, for scalefactor bands coded by perceptual + noise substitution the predictors belonging to the + corresponding spectral coefficients are reset. + */ + pns_reset_pred_state(ics1, hDecoder->pred_stat[cpe->channel]); + pns_reset_pred_state(ics2, hDecoder->pred_stat[cpe->paired_channel]); + } +#endif + +#ifdef LTP_DEC + if (is_ltp_ot(hDecoder->object_type)) { + ltp_info *ltp1 = &(ics1->ltp); + ltp_info *ltp2 = (cpe->common_window) ? &(ics2->ltp2) : &(ics2->ltp); +#ifdef LD_DEC + if (hDecoder->object_type == LD) { + if (ltp1->data_present) { + if (ltp1->lag_update) { + hDecoder->ltp_lag[cpe->channel] = ltp1->lag; + } + } + ltp1->lag = hDecoder->ltp_lag[cpe->channel]; + if (ltp2->data_present) { + if (ltp2->lag_update) { + hDecoder->ltp_lag[cpe->paired_channel] = ltp2->lag; + } + } + ltp2->lag = hDecoder->ltp_lag[cpe->paired_channel]; + } +#endif + + /* long term prediction */ + lt_prediction(ics1, ltp1, spec_coef1, hDecoder->lt_pred_stat[cpe->channel], hDecoder->fb, + ics1->window_shape, hDecoder->window_shape_prev[cpe->channel], + hDecoder->sf_index, hDecoder->object_type, hDecoder->frameLength); + lt_prediction(ics2, ltp2, spec_coef2, hDecoder->lt_pred_stat[cpe->paired_channel], hDecoder->fb, + ics2->window_shape, hDecoder->window_shape_prev[cpe->paired_channel], + hDecoder->sf_index, hDecoder->object_type, hDecoder->frameLength); + } +#endif + + /* tns decoding */ + tns_decode_frame(ics1, &(ics1->tns), hDecoder->sf_index, hDecoder->object_type, + spec_coef1, hDecoder->frameLength); + tns_decode_frame(ics2, &(ics2->tns), hDecoder->sf_index, hDecoder->object_type, + spec_coef2, hDecoder->frameLength); + + /* drc decoding */ + if (hDecoder->drc->present) { + if (!hDecoder->drc->exclude_mask[cpe->channel] || !hDecoder->drc->excluded_chns_present) { + drc_decode(hDecoder->drc, spec_coef1); + } + if (!hDecoder->drc->exclude_mask[cpe->paired_channel] || !hDecoder->drc->excluded_chns_present) { + drc_decode(hDecoder->drc, spec_coef2); + } + } + + /* filter bank */ +#ifdef SSR_DEC + if (hDecoder->object_type != SSR) { +#endif + ifilter_bank(hDecoder->fb, ics1->window_sequence, ics1->window_shape, + hDecoder->window_shape_prev[cpe->channel], spec_coef1, + hDecoder->time_out[cpe->channel], hDecoder->fb_intermed[cpe->channel], + hDecoder->object_type, hDecoder->frameLength); + ifilter_bank(hDecoder->fb, ics2->window_sequence, ics2->window_shape, + hDecoder->window_shape_prev[cpe->paired_channel], spec_coef2, + hDecoder->time_out[cpe->paired_channel], hDecoder->fb_intermed[cpe->paired_channel], + hDecoder->object_type, hDecoder->frameLength); +#ifdef SSR_DEC + } else { + ssr_decode(&(ics1->ssr), hDecoder->fb, ics1->window_sequence, ics1->window_shape, + hDecoder->window_shape_prev[cpe->channel], spec_coef1, hDecoder->time_out[cpe->channel], + hDecoder->ssr_overlap[cpe->channel], hDecoder->ipqf_buffer[cpe->channel], + hDecoder->prev_fmd[cpe->channel], hDecoder->frameLength); + ssr_decode(&(ics2->ssr), hDecoder->fb, ics2->window_sequence, ics2->window_shape, + hDecoder->window_shape_prev[cpe->paired_channel], spec_coef2, hDecoder->time_out[cpe->paired_channel], + hDecoder->ssr_overlap[cpe->paired_channel], hDecoder->ipqf_buffer[cpe->paired_channel], + hDecoder->prev_fmd[cpe->paired_channel], hDecoder->frameLength); + } +#endif + + /* save window shape for next frame */ + hDecoder->window_shape_prev[cpe->channel] = ics1->window_shape; + hDecoder->window_shape_prev[cpe->paired_channel] = ics2->window_shape; + +#ifdef LTP_DEC + if (is_ltp_ot(hDecoder->object_type)) { + lt_update_state(hDecoder->lt_pred_stat[cpe->channel], hDecoder->time_out[cpe->channel], + hDecoder->fb_intermed[cpe->channel], hDecoder->frameLength, hDecoder->object_type); + lt_update_state(hDecoder->lt_pred_stat[cpe->paired_channel], hDecoder->time_out[cpe->paired_channel], + hDecoder->fb_intermed[cpe->paired_channel], hDecoder->frameLength, hDecoder->object_type); + } +#endif + +#ifdef SBR_DEC + if (((hDecoder->sbr_present_flag == 1) || (hDecoder->forceUpSampling == 1)) + && hDecoder->sbr_alloced[hDecoder->fr_ch_ele]) { + int ele = hDecoder->fr_ch_ele; + int ch0 = cpe->channel; + int ch1 = cpe->paired_channel; + + /* following case can happen when forceUpSampling == 1 */ + if (hDecoder->sbr[ele] == NULL) { + hDecoder->sbr[ele] = sbrDecodeInit(hDecoder->frameLength, + hDecoder->element_id[ele], 2 * get_sample_rate(hDecoder->sf_index), + hDecoder->downSampledSBR +#ifdef DRM + , 0 +#endif + ); + } + + if (cpe->ics1.window_sequence == EIGHT_SHORT_SEQUENCE) { + hDecoder->sbr[ele]->maxAACLine = 8 * min(cpe->ics1.swb_offset[max(cpe->ics1.max_sfb - 1, 0)], cpe->ics1.swb_offset_max); + } else { + hDecoder->sbr[ele]->maxAACLine = min(cpe->ics1.swb_offset[max(cpe->ics1.max_sfb - 1, 0)], cpe->ics1.swb_offset_max); + } + + retval = sbrDecodeCoupleFrame(hDecoder->sbr[ele], + hDecoder->time_out[ch0], hDecoder->time_out[ch1], + hDecoder->postSeekResetFlag, hDecoder->downSampledSBR); + if (retval > 0) { + return retval; + } + } else if (((hDecoder->sbr_present_flag == 1) || (hDecoder->forceUpSampling == 1)) + && !hDecoder->sbr_alloced[hDecoder->fr_ch_ele]) { + return 23; + } +#endif + + return 0; +} |