105 lines
3.6 KiB
C
105 lines
3.6 KiB
C
|
/*
|
||
|
|
* AAC Spectral Band Replication decoding functions
|
||
|
|
* Copyright (c) 2008-2009 Robert Swain ( rob opendot cl )
|
||
|
|
* Copyright (c) 2009-2010 Alex Converse <alex.converse@gmail.com>
|
||
|
|
*
|
||
|
|
* 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
|
||
|
|
*/
|
||
|
|
|
||
|
|
static void sbr_sum64x5_c(INTFLOAT *z)
|
||
|
|
{
|
||
|
|
int k;
|
||
|
|
for (k = 0; k < 64; k++) {
|
||
|
|
INTFLOAT f = z[k] + z[k + 64] + z[k + 128] + z[k + 192] + z[k + 256];
|
||
|
|
z[k] = f;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static void sbr_qmf_deint_bfly_c(INTFLOAT *v, const INTFLOAT *src0, const INTFLOAT *src1)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
for (i = 0; i < 64; i++) {
|
||
|
|
#if USE_FIXED
|
||
|
|
v[ i] = (int)(0x10U + src0[i] - src1[63 - i]) >> 5;
|
||
|
|
v[127 - i] = (int)(0x10U + src0[i] + src1[63 - i]) >> 5;
|
||
|
|
#else
|
||
|
|
v[ i] = src0[i] - src1[63 - i];
|
||
|
|
v[127 - i] = src0[i] + src1[63 - i];
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static void sbr_hf_apply_noise_0(INTFLOAT (*Y)[2], const AAC_FLOAT *s_m,
|
||
|
|
const AAC_FLOAT *q_filt, int noise,
|
||
|
|
int kx, int m_max)
|
||
|
|
{
|
||
|
|
sbr_hf_apply_noise(Y, s_m, q_filt, noise, (INTFLOAT)1.0, (INTFLOAT)0.0, m_max);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void sbr_hf_apply_noise_1(INTFLOAT (*Y)[2], const AAC_FLOAT *s_m,
|
||
|
|
const AAC_FLOAT *q_filt, int noise,
|
||
|
|
int kx, int m_max)
|
||
|
|
{
|
||
|
|
INTFLOAT phi_sign = 1 - 2 * (kx & 1);
|
||
|
|
sbr_hf_apply_noise(Y, s_m, q_filt, noise, (INTFLOAT)0.0, phi_sign, m_max);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void sbr_hf_apply_noise_2(INTFLOAT (*Y)[2], const AAC_FLOAT *s_m,
|
||
|
|
const AAC_FLOAT *q_filt, int noise,
|
||
|
|
int kx, int m_max)
|
||
|
|
{
|
||
|
|
sbr_hf_apply_noise(Y, s_m, q_filt, noise, (INTFLOAT)-1.0, (INTFLOAT)0.0, m_max);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void sbr_hf_apply_noise_3(INTFLOAT (*Y)[2], const AAC_FLOAT *s_m,
|
||
|
|
const AAC_FLOAT *q_filt, int noise,
|
||
|
|
int kx, int m_max)
|
||
|
|
{
|
||
|
|
INTFLOAT phi_sign = 1 - 2 * (kx & 1);
|
||
|
|
sbr_hf_apply_noise(Y, s_m, q_filt, noise, (INTFLOAT)0.0, -phi_sign, m_max);
|
||
|
|
}
|
||
|
|
|
||
|
|
av_cold void AAC_RENAME(ff_sbrdsp_init)(SBRDSPContext *s)
|
||
|
|
{
|
||
|
|
s->sum64x5 = sbr_sum64x5_c;
|
||
|
|
s->sum_square = sbr_sum_square_c;
|
||
|
|
s->neg_odd_64 = sbr_neg_odd_64_c;
|
||
|
|
s->qmf_pre_shuffle = sbr_qmf_pre_shuffle_c;
|
||
|
|
s->qmf_post_shuffle = sbr_qmf_post_shuffle_c;
|
||
|
|
s->qmf_deint_neg = sbr_qmf_deint_neg_c;
|
||
|
|
s->qmf_deint_bfly = sbr_qmf_deint_bfly_c;
|
||
|
|
s->autocorrelate = sbr_autocorrelate_c;
|
||
|
|
s->hf_gen = sbr_hf_gen_c;
|
||
|
|
s->hf_g_filt = sbr_hf_g_filt_c;
|
||
|
|
|
||
|
|
s->hf_apply_noise[0] = sbr_hf_apply_noise_0;
|
||
|
|
s->hf_apply_noise[1] = sbr_hf_apply_noise_1;
|
||
|
|
s->hf_apply_noise[2] = sbr_hf_apply_noise_2;
|
||
|
|
s->hf_apply_noise[3] = sbr_hf_apply_noise_3;
|
||
|
|
|
||
|
|
#if !USE_FIXED
|
||
|
|
if (ARCH_ARM)
|
||
|
|
ff_sbrdsp_init_arm(s);
|
||
|
|
if (ARCH_AARCH64)
|
||
|
|
ff_sbrdsp_init_aarch64(s);
|
||
|
|
if (ARCH_X86)
|
||
|
|
ff_sbrdsp_init_x86(s);
|
||
|
|
if (ARCH_MIPS)
|
||
|
|
ff_sbrdsp_init_mips(s);
|
||
|
|
#endif /* !USE_FIXED */
|
||
|
|
}
|