From f85bc147fb87de048ccc5767e186ac59ec0284ef Mon Sep 17 00:00:00 2001 From: Djordje Pesut Date: Mon, 20 Jul 2015 13:36:17 +0200 Subject: avcodec: Implementation of AAC_fixed_decoder (SBR-module) Add fixed poind code. Signed-off-by: Nedeljko Babic Signed-off-by: Michael Niedermayer --- libavcodec/aacsbr_fixed.c | 586 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 586 insertions(+) create mode 100644 libavcodec/aacsbr_fixed.c (limited to 'libavcodec/aacsbr_fixed.c') diff --git a/libavcodec/aacsbr_fixed.c b/libavcodec/aacsbr_fixed.c new file mode 100644 index 0000000000..5a5c9cc75b --- /dev/null +++ b/libavcodec/aacsbr_fixed.c @@ -0,0 +1,586 @@ +/* + * Copyright (c) 2013 + * MIPS Technologies, Inc., California. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the MIPS Technologies, Inc., nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * AAC Spectral Band Replication decoding functions (fixed-point) + * Copyright (c) 2008-2009 Robert Swain ( rob opendot cl ) + * Copyright (c) 2009-2010 Alex Converse + * + * 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 + */ + +/** + * @file + * AAC Spectral Band Replication decoding functions (fixed-point) + * Note: Rounding-to-nearest used unless otherwise stated + * @author Robert Swain ( rob opendot cl ) + * @author Stanislav Ocovaj ( stanislav.ocovaj imgtec com ) + */ +#define USE_FIXED 1 + +#include "aac.h" +#include "sbr.h" +#include "aacsbr.h" +#include "aacsbrdata.h" +#include "aacsbr_fixed_tablegen.h" +#include "fft.h" +#include "aacps.h" +#include "sbrdsp.h" +#include "libavutil/internal.h" +#include "libavutil/libm.h" +#include "libavutil/avassert.h" + +#include +#include +#include + +static VLC vlc_sbr[10]; +static void aacsbr_func_ptr_init(AACSBRContext *c); +static const int CONST_LN2 = Q31(0.6931471806/256); // ln(2)/256 +static const int CONST_RECIP_LN2 = Q31(0.7213475204); // 0.5/ln(2) +static const int CONST_SQRT2 = Q30(0.7071067812); // sqrt(2)/2 +static const int CONST_076923 = Q31(0.76923076923076923077f); + +int fixed_log_table[10] = +{ + Q31(1.0/2), Q31(1.0/3), Q31(1.0/4), Q31(1.0/5), Q31(1.0/6), + Q31(1.0/7), Q31(1.0/8), Q31(1.0/9), Q31(1.0/10), Q31(1.0/11) +}; + +static int fixed_log(int x) +{ + int i, ret, xpow, tmp; + + ret = x; + xpow = x; + for (i=0; i<10; i+=2){ + xpow = (int)(((int64_t)xpow * x + 0x40000000) >> 31); + tmp = (int)(((int64_t)xpow * fixed_log_table[i] + 0x40000000) >> 31); + ret -= tmp; + + xpow = (int)(((int64_t)xpow * x + 0x40000000) >> 31); + tmp = (int)(((int64_t)xpow * fixed_log_table[i+1] + 0x40000000) >> 31); + ret += tmp; + } + + return ret; +} + +int fixed_exp_table[7] = +{ + Q31(1.0/2), Q31(1.0/6), Q31(1.0/24), Q31(1.0/120), + Q31(1.0/720), Q31(1.0/5040), Q31(1.0/40320) +}; + +static int fixed_exp(int x) +{ + int i, ret, xpow, tmp; + + ret = 0x800000 + x; + xpow = x; + for (i=0; i<7; i++){ + xpow = (int)(((int64_t)xpow * x + 0x400000) >> 23); + tmp = (int)(((int64_t)xpow * fixed_exp_table[i] + 0x40000000) >> 31); + ret += tmp; + } + + return ret; +} + +static void make_bands(int16_t* bands, int start, int stop, int num_bands) +{ + int k, previous, present; + int base, prod, nz = 0; + + base = (stop << 23) / start; + while (base < 0x40000000){ + base <<= 1; + nz++; + } + base = fixed_log(base - 0x80000000); + base = (((base + 0x80) >> 8) + (8-nz)*CONST_LN2) / num_bands; + base = fixed_exp(base); + + previous = start; + prod = start << 23; + + for (k = 0; k < num_bands-1; k++) { + prod = (int)(((int64_t)prod * base + 0x400000) >> 23); + present = (prod + 0x400000) >> 23; + bands[k] = present - previous; + previous = present; + } + bands[num_bands-1] = stop - previous; +} + +/// Dequantization and stereo decoding (14496-3 sp04 p203) +static void sbr_dequant(SpectralBandReplication *sbr, int id_aac) +{ + int k, e; + int ch; + + if (id_aac == TYPE_CPE && sbr->bs_coupling) { + int alpha = sbr->data[0].bs_amp_res ? 2 : 1; + int pan_offset = sbr->data[0].bs_amp_res ? 12 : 24; + for (e = 1; e <= sbr->data[0].bs_num_env; e++) { + for (k = 0; k < sbr->n[sbr->data[0].bs_freq_res[e]]; k++) { + SoftFloat temp1, temp2, fac; + + temp1.exp = sbr->data[0].env_facs[e][k].mant * alpha + 14; + if (temp1.exp & 1) + temp1.mant = 759250125; + else + temp1.mant = 0x20000000; + temp1.exp = (temp1.exp >> 1) + 1; + + temp2.exp = (pan_offset - sbr->data[1].env_facs[e][k].mant) * alpha; + if (temp2.exp & 1) + temp2.mant = 759250125; + else + temp2.mant = 0x20000000; + temp2.exp = (temp2.exp >> 1) + 1; + fac = av_div_sf(temp1, av_add_sf(FLOAT_1, temp2)); + sbr->data[0].env_facs[e][k] = fac; + sbr->data[1].env_facs[e][k] = av_mul_sf(fac, temp2); + } + } + for (e = 1; e <= sbr->data[0].bs_num_noise; e++) { + for (k = 0; k < sbr->n_q; k++) { + SoftFloat temp1, temp2, fac; + + temp1.exp = NOISE_FLOOR_OFFSET - \ + sbr->data[0].noise_facs[e][k].mant + 2; + temp1.mant = 0x20000000; + temp2.exp = 12 - sbr->data[1].noise_facs[e][k].mant + 1; + temp2.mant = 0x20000000; + fac = av_div_sf(temp1, av_add_sf(FLOAT_1, temp2)); + sbr->data[0].noise_facs[e][k] = fac; + sbr->data[1].noise_facs[e][k] = av_mul_sf(fac, temp2); + } + } + } else { // SCE or one non-coupled CPE + for (ch = 0; ch < (id_aac == TYPE_CPE) + 1; ch++) { + int alpha = sbr->data[ch].bs_amp_res ? 2 : 1; + for (e = 1; e <= sbr->data[ch].bs_num_env; e++) + for (k = 0; k < sbr->n[sbr->data[ch].bs_freq_res[e]]; k++){ + SoftFloat temp1; + + temp1.exp = alpha * sbr->data[ch].env_facs[e][k].mant + 12; + if (temp1.exp & 1) + temp1.mant = 759250125; + else + temp1.mant = 0x20000000; + temp1.exp = (temp1.exp >> 1) + 1; + + sbr->data[ch].env_facs[e][k] = temp1; + } + for (e = 1; e <= sbr->data[ch].bs_num_noise; e++) + for (k = 0; k < sbr->n_q; k++){ + sbr->data[ch].noise_facs[e][k].exp = NOISE_FLOOR_OFFSET - \ + sbr->data[ch].noise_facs[e][k].mant + 1; + sbr->data[ch].noise_facs[e][k].mant = 0x20000000; + } + } + } +} + +/** High Frequency Generation (14496-3 sp04 p214+) and Inverse Filtering + * (14496-3 sp04 p214) + * Warning: This routine does not seem numerically stable. + */ +static void sbr_hf_inverse_filter(SBRDSPContext *dsp, + int (*alpha0)[2], int (*alpha1)[2], + const int X_low[32][40][2], int k0) +{ + int k; + int shift, round; + + for (k = 0; k < k0; k++) { + SoftFloat phi[3][2][2]; + SoftFloat a00, a01, a10, a11; + SoftFloat dk; + + dsp->autocorrelate(X_low[k], phi); + + dk = av_sub_sf(av_mul_sf(phi[2][1][0], phi[1][0][0]), + av_mul_sf(av_add_sf(av_mul_sf(phi[1][1][0], phi[1][1][0]), + av_mul_sf(phi[1][1][1], phi[1][1][1])), FLOAT_0999999)); + + if (!dk.mant) { + a10 = FLOAT_0; + a11 = FLOAT_0; + } else { + SoftFloat temp_real, temp_im; + temp_real = av_sub_sf(av_sub_sf(av_mul_sf(phi[0][0][0], phi[1][1][0]), + av_mul_sf(phi[0][0][1], phi[1][1][1])), + av_mul_sf(phi[0][1][0], phi[1][0][0])); + temp_im = av_sub_sf(av_add_sf(av_mul_sf(phi[0][0][0], phi[1][1][1]), + av_mul_sf(phi[0][0][1], phi[1][1][0])), + av_mul_sf(phi[0][1][1], phi[1][0][0])); + + a10 = av_div_sf(temp_real, dk); + a11 = av_div_sf(temp_im, dk); + } + + if (!phi[1][0][0].mant) { + a00 = FLOAT_0; + a01 = FLOAT_0; + } else { + SoftFloat temp_real, temp_im; + temp_real = av_add_sf(phi[0][0][0], + av_add_sf(av_mul_sf(a10, phi[1][1][0]), + av_mul_sf(a11, phi[1][1][1]))); + temp_im = av_add_sf(phi[0][0][1], + av_sub_sf(av_mul_sf(a11, phi[1][1][0]), + av_mul_sf(a10, phi[1][1][1]))); + + temp_real.mant = -temp_real.mant; + temp_im.mant = -temp_im.mant; + a00 = av_div_sf(temp_real, phi[1][0][0]); + a01 = av_div_sf(temp_im, phi[1][0][0]); + } + + shift = a00.exp; + if (shift >= 3) + alpha0[k][0] = 0x7fffffff; + else { + a00.mant <<= 1; + shift = 2-shift; + if (shift == 0) + alpha0[k][0] = a00.mant; + else { + round = 1 << (shift-1); + alpha0[k][0] = (a00.mant + round) >> shift; + } + } + + shift = a01.exp; + if (shift >= 3) + alpha0[k][1] = 0x7fffffff; + else { + a01.mant <<= 1; + shift = 2-shift; + if (shift == 0) + alpha0[k][1] = a01.mant; + else { + round = 1 << (shift-1); + alpha0[k][1] = (a01.mant + round) >> shift; + } + } + shift = a10.exp; + if (shift >= 3) + alpha1[k][0] = 0x7fffffff; + else { + a10.mant <<= 1; + shift = 2-shift; + if (shift == 0) + alpha1[k][0] = a10.mant; + else { + round = 1 << (shift-1); + alpha1[k][0] = (a10.mant + round) >> shift; + } + } + + shift = a11.exp; + if (shift >= 3) + alpha1[k][1] = 0x7fffffff; + else { + a11.mant <<= 1; + shift = 2-shift; + if (shift == 0) + alpha1[k][1] = a11.mant; + else { + round = 1 << (shift-1); + alpha1[k][1] = (a11.mant + round) >> shift; + } + } + + shift = (int)(((int64_t)(alpha1[k][0]>>1) * (alpha1[k][0]>>1) + \ + (int64_t)(alpha1[k][1]>>1) * (alpha1[k][1]>>1) + \ + 0x40000000) >> 31); + if (shift >= 0x20000000){ + alpha1[k][0] = 0; + alpha1[k][1] = 0; + alpha0[k][0] = 0; + alpha0[k][1] = 0; + } + + shift = (int)(((int64_t)(alpha0[k][0]>>1) * (alpha0[k][0]>>1) + \ + (int64_t)(alpha0[k][1]>>1) * (alpha0[k][1]>>1) + \ + 0x40000000) >> 31); + if (shift >= 0x20000000){ + alpha1[k][0] = 0; + alpha1[k][1] = 0; + alpha0[k][0] = 0; + alpha0[k][1] = 0; + } + } +} + +/// Chirp Factors (14496-3 sp04 p214) +static void sbr_chirp(SpectralBandReplication *sbr, SBRData *ch_data) +{ + int i; + int new_bw; + static const int bw_tab[] = { 0, 1610612736, 1932735283, 2104533975 }; + int64_t accu; + + for (i = 0; i < sbr->n_q; i++) { + if (ch_data->bs_invf_mode[0][i] + ch_data->bs_invf_mode[1][i] == 1) + new_bw = 1288490189; + else + new_bw = bw_tab[ch_data->bs_invf_mode[0][i]]; + + if (new_bw < ch_data->bw_array[i]){ + accu = (int64_t)new_bw * 1610612736; + accu += (int64_t)ch_data->bw_array[i] * 0x20000000; + new_bw = (int)((accu + 0x40000000) >> 31); + } else { + accu = (int64_t)new_bw * 1946157056; + accu += (int64_t)ch_data->bw_array[i] * 201326592; + new_bw = (int)((accu + 0x40000000) >> 31); + } + ch_data->bw_array[i] = new_bw < 0x2000000 ? 0 : new_bw; + } +} + +/** + * Calculation of levels of additional HF signal components (14496-3 sp04 p219) + * and Calculation of gain (14496-3 sp04 p219) + */ +static void sbr_gain_calc(AACContext *ac, SpectralBandReplication *sbr, + SBRData *ch_data, const int e_a[2]) +{ + int e, k, m; + // max gain limits : -3dB, 0dB, 3dB, inf dB (limiter off) + static const SoftFloat limgain[4] = { { 760155524, 0 }, { 0x20000000, 1 }, + { 758351638, 1 }, { 625000000, 34 } }; + + for (e = 0; e < ch_data->bs_num_env; e++) { + int delta = !((e == e_a[1]) || (e == e_a[0])); + for (k = 0; k < sbr->n_lim; k++) { + SoftFloat gain_boost, gain_max; + SoftFloat sum[2] = { { 0, 0}, { 0, 0 } }; + for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) { + const SoftFloat temp = av_div_sf(sbr->e_origmapped[e][m], + av_add_sf(FLOAT_1, sbr->q_mapped[e][m])); + sbr->q_m[e][m] = av_sqrt_sf(av_mul_sf(temp, sbr->q_mapped[e][m])); + sbr->s_m[e][m] = av_sqrt_sf(av_mul_sf(temp, av_int2sf(ch_data->s_indexmapped[e + 1][m], 0))); + if (!sbr->s_mapped[e][m]) { + if (delta) { + sbr->gain[e][m] = av_sqrt_sf(av_div_sf(sbr->e_origmapped[e][m], + av_mul_sf(av_add_sf(FLOAT_1, sbr->e_curr[e][m]), + av_add_sf(FLOAT_1, sbr->q_mapped[e][m])))); + } else { + sbr->gain[e][m] = av_sqrt_sf(av_div_sf(sbr->e_origmapped[e][m], + av_add_sf(FLOAT_1, sbr->e_curr[e][m]))); + } + } else { + sbr->gain[e][m] = av_sqrt_sf( + av_div_sf( + av_mul_sf(sbr->e_origmapped[e][m], sbr->q_mapped[e][m]), + av_mul_sf( + av_add_sf(FLOAT_1, sbr->e_curr[e][m]), + av_add_sf(FLOAT_1, sbr->q_mapped[e][m])))); + } + } + for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) { + sum[0] = av_add_sf(sum[0], sbr->e_origmapped[e][m]); + sum[1] = av_add_sf(sum[1], sbr->e_curr[e][m]); + } + gain_max = av_mul_sf(limgain[sbr->bs_limiter_gains], + av_sqrt_sf( + av_div_sf( + av_add_sf(FLOAT_EPSILON, sum[0]), + av_add_sf(FLOAT_EPSILON, sum[1])))); + if (av_gt_sf(gain_max, FLOAT_100000)) + gain_max = FLOAT_100000; + for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) { + SoftFloat q_m_max = av_div_sf( + av_mul_sf(sbr->q_m[e][m], gain_max), + sbr->gain[e][m]); + if (av_gt_sf(sbr->q_m[e][m], q_m_max)) + sbr->q_m[e][m] = q_m_max; + if (av_gt_sf(sbr->gain[e][m], gain_max)) + sbr->gain[e][m] = gain_max; + } + sum[0] = sum[1] = FLOAT_0; + for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) { + sum[0] = av_add_sf(sum[0], sbr->e_origmapped[e][m]); + sum[1] = av_add_sf(sum[1], + av_mul_sf( + av_mul_sf(sbr->e_curr[e][m], + sbr->gain[e][m]), + sbr->gain[e][m])); + sum[1] = av_add_sf(sum[1], + av_mul_sf(sbr->s_m[e][m], sbr->s_m[e][m])); + if (delta && !sbr->s_m[e][m].mant) + sum[1] = av_add_sf(sum[1], + av_mul_sf(sbr->q_m[e][m], sbr->q_m[e][m])); + } + gain_boost = av_sqrt_sf( + av_div_sf( + av_add_sf(FLOAT_EPSILON, sum[0]), + av_add_sf(FLOAT_EPSILON, sum[1]))); + if (av_gt_sf(gain_boost, FLOAT_1584893192)) + gain_boost = FLOAT_1584893192; + + for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) { + sbr->gain[e][m] = av_mul_sf(sbr->gain[e][m], gain_boost); + sbr->q_m[e][m] = av_mul_sf(sbr->q_m[e][m], gain_boost); + sbr->s_m[e][m] = av_mul_sf(sbr->s_m[e][m], gain_boost); + } + } + } +} + +/// Assembling HF Signals (14496-3 sp04 p220) +static void sbr_hf_assemble(int Y1[38][64][2], + const int X_high[64][40][2], + SpectralBandReplication *sbr, SBRData *ch_data, + const int e_a[2]) +{ + int e, i, j, m; + const int h_SL = 4 * !sbr->bs_smoothing_mode; + const int kx = sbr->kx[1]; + const int m_max = sbr->m[1]; + static const SoftFloat h_smooth[5] = { + { 715827883, -1 }, + { 647472402, -1 }, + { 937030863, -2 }, + { 989249804, -3 }, + { 546843842, -4 }, + }; + SoftFloat (*g_temp)[48] = ch_data->g_temp, (*q_temp)[48] = ch_data->q_temp; + int indexnoise = ch_data->f_indexnoise; + int indexsine = ch_data->f_indexsine; + + if (sbr->reset) { + for (i = 0; i < h_SL; i++) { + memcpy(g_temp[i + 2*ch_data->t_env[0]], sbr->gain[0], m_max * sizeof(sbr->gain[0][0])); + memcpy(q_temp[i + 2*ch_data->t_env[0]], sbr->q_m[0], m_max * sizeof(sbr->q_m[0][0])); + } + } else if (h_SL) { + for (i = 0; i < 4; i++) { + memcpy(g_temp[i + 2 * ch_data->t_env[0]], + g_temp[i + 2 * ch_data->t_env_num_env_old], + sizeof(g_temp[0])); + memcpy(q_temp[i + 2 * ch_data->t_env[0]], + q_temp[i + 2 * ch_data->t_env_num_env_old], + sizeof(q_temp[0])); + } + } + + for (e = 0; e < ch_data->bs_num_env; e++) { + for (i = 2 * ch_data->t_env[e]; i < 2 * ch_data->t_env[e + 1]; i++) { + memcpy(g_temp[h_SL + i], sbr->gain[e], m_max * sizeof(sbr->gain[0][0])); + memcpy(q_temp[h_SL + i], sbr->q_m[e], m_max * sizeof(sbr->q_m[0][0])); + } + } + + for (e = 0; e < ch_data->bs_num_env; e++) { + for (i = 2 * ch_data->t_env[e]; i < 2 * ch_data->t_env[e + 1]; i++) { + SoftFloat g_filt_tab[48]; + SoftFloat q_filt_tab[48]; + SoftFloat *g_filt, *q_filt; + + if (h_SL && e != e_a[0] && e != e_a[1]) { + g_filt = g_filt_tab; + q_filt = q_filt_tab; + for (m = 0; m < m_max; m++) { + const int idx1 = i + h_SL; + g_filt[m].mant = g_filt[m].exp = 0; + q_filt[m].mant = q_filt[m].exp = 0; + for (j = 0; j <= h_SL; j++) { + g_filt[m] = av_add_sf(g_filt[m], + av_mul_sf(g_temp[idx1 - j][m], + h_smooth[j])); + q_filt[m] = av_add_sf(q_filt[m], + av_mul_sf(q_temp[idx1 - j][m], + h_smooth[j])); + } + } + } else { + g_filt = g_temp[i + h_SL]; + q_filt = q_temp[i]; + } + + sbr->dsp.hf_g_filt(Y1[i] + kx, X_high + kx, g_filt, m_max, + i + ENVELOPE_ADJUSTMENT_OFFSET); + + if (e != e_a[0] && e != e_a[1]) { + sbr->dsp.hf_apply_noise[indexsine](Y1[i] + kx, sbr->s_m[e], + q_filt, indexnoise, + kx, m_max); + } else { + int idx = indexsine&1; + int A = (1-((indexsine+(kx & 1))&2)); + int B = (A^(-idx)) + idx; + int *out = &Y1[i][kx][idx]; + int shift, round; + + SoftFloat *in = sbr->s_m[e]; + for (m = 0; m+1 < m_max; m+=2) { + shift = 22 - in[m ].exp; + round = 1 << (shift-1); + out[2*m ] += (in[m ].mant * A + round) >> shift; + + shift = 22 - in[m+1].exp; + round = 1 << (shift-1); + out[2*m+2] += (in[m+1].mant * B + round) >> shift; + } + if(m_max&1) + { + shift = 22 - in[m ].exp; + round = 1 << (shift-1); + + out[2*m ] += (in[m ].mant * A + round) >> shift; + } + } + indexnoise = (indexnoise + m_max) & 0x1ff; + indexsine = (indexsine + 1) & 3; + } + } + ch_data->f_indexnoise = indexnoise; + ch_data->f_indexsine = indexsine; +} + +#include "aacsbr_template.c" -- cgit v1.2.3