diff options
Diffstat (limited to 'faad2/src/libfaad/specrec.c')
| -rw-r--r-- | faad2/src/libfaad/specrec.c | 1330 |
1 files changed, 1330 insertions, 0 deletions
diff --git a/faad2/src/libfaad/specrec.c b/faad2/src/libfaad/specrec.c new file mode 100644 index 0000000..478c246 --- /dev/null +++ b/faad2/src/libfaad/specrec.c @@ -0,0 +1,1330 @@ +/*
+** 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 "common.h"
+#include "structs.h"
+
+#include <string.h>
+#include <stdlib.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;
+ }
+
+ /* 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;
+}
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