mirror of https://git.ffmpeg.org/ffmpeg.git
103 lines
3.5 KiB
C
103 lines
3.5 KiB
C
/*
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* AAC Spectral Band Replication decoding functions
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* Copyright (c) 2008-2009 Robert Swain ( rob opendot cl )
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* Copyright (c) 2009-2010 Alex Converse <alex.converse@gmail.com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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static void sbr_sum64x5_c(INTFLOAT *z)
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{
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int k;
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for (k = 0; k < 64; k++) {
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INTFLOAT f = z[k] + z[k + 64] + z[k + 128] + z[k + 192] + z[k + 256];
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z[k] = f;
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}
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}
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static void sbr_qmf_deint_bfly_c(INTFLOAT *v, const INTFLOAT *src0, const INTFLOAT *src1)
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{
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int i;
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for (i = 0; i < 64; i++) {
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#if USE_FIXED
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v[ i] = (int)(0x10U + src0[i] - src1[63 - i]) >> 5;
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v[127 - i] = (int)(0x10U + src0[i] + src1[63 - i]) >> 5;
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#else
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v[ i] = src0[i] - src1[63 - i];
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v[127 - i] = src0[i] + src1[63 - i];
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#endif
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}
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}
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static void sbr_hf_apply_noise_0(INTFLOAT (*Y)[2], const AAC_FLOAT *s_m,
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const AAC_FLOAT *q_filt, int noise,
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int kx, int m_max)
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{
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sbr_hf_apply_noise(Y, s_m, q_filt, noise, (INTFLOAT)1.0, (INTFLOAT)0.0, m_max);
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}
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static void sbr_hf_apply_noise_1(INTFLOAT (*Y)[2], const AAC_FLOAT *s_m,
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const AAC_FLOAT *q_filt, int noise,
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int kx, int m_max)
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{
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INTFLOAT phi_sign = 1 - 2 * (kx & 1);
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sbr_hf_apply_noise(Y, s_m, q_filt, noise, (INTFLOAT)0.0, phi_sign, m_max);
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}
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static void sbr_hf_apply_noise_2(INTFLOAT (*Y)[2], const AAC_FLOAT *s_m,
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const AAC_FLOAT *q_filt, int noise,
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int kx, int m_max)
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{
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sbr_hf_apply_noise(Y, s_m, q_filt, noise, (INTFLOAT)-1.0, (INTFLOAT)0.0, m_max);
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}
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static void sbr_hf_apply_noise_3(INTFLOAT (*Y)[2], const AAC_FLOAT *s_m,
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const AAC_FLOAT *q_filt, int noise,
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int kx, int m_max)
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{
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INTFLOAT phi_sign = 1 - 2 * (kx & 1);
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sbr_hf_apply_noise(Y, s_m, q_filt, noise, (INTFLOAT)0.0, -phi_sign, m_max);
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}
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av_cold void AAC_RENAME(ff_sbrdsp_init)(SBRDSPContext *s)
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{
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s->sum64x5 = sbr_sum64x5_c;
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s->sum_square = sbr_sum_square_c;
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s->neg_odd_64 = sbr_neg_odd_64_c;
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s->qmf_pre_shuffle = sbr_qmf_pre_shuffle_c;
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s->qmf_post_shuffle = sbr_qmf_post_shuffle_c;
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s->qmf_deint_neg = sbr_qmf_deint_neg_c;
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s->qmf_deint_bfly = sbr_qmf_deint_bfly_c;
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s->autocorrelate = sbr_autocorrelate_c;
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s->hf_gen = sbr_hf_gen_c;
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s->hf_g_filt = sbr_hf_g_filt_c;
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s->hf_apply_noise[0] = sbr_hf_apply_noise_0;
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s->hf_apply_noise[1] = sbr_hf_apply_noise_1;
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s->hf_apply_noise[2] = sbr_hf_apply_noise_2;
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s->hf_apply_noise[3] = sbr_hf_apply_noise_3;
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#if !USE_FIXED
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if (ARCH_ARM)
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ff_sbrdsp_init_arm(s);
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if (ARCH_X86)
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ff_sbrdsp_init_x86(s);
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if (ARCH_MIPS)
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ff_sbrdsp_init_mips(s);
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#endif /* !USE_FIXED */
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}
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