mirror of
https://github.com/librempeg/librempeg
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106 lines
3.9 KiB
C
106 lines
3.9 KiB
C
/*
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* Bluetooth low-complexity, subband codec (SBC)
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*
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* Copyright (C) 2017 Aurelien Jacobs <aurel@gnuage.org>
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* Copyright (C) 2008-2010 Nokia Corporation
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* Copyright (C) 2004-2010 Marcel Holtmann <marcel@holtmann.org>
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* Copyright (C) 2004-2005 Henryk Ploetz <henryk@ploetzli.ch>
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* Copyright (C) 2005-2006 Brad Midgley <bmidgley@xmission.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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/**
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* @file
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* SBC ARMv6 optimization for some basic "building bricks"
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*/
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#include "libavutil/cpu.h"
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#include "libavutil/arm/cpu.h"
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#include "libavcodec/sbcdsp.h"
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void ff_sbc_analyze_4_armv6(const int16_t *in, int32_t *out, const int16_t *consts);
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void ff_sbc_analyze_8_armv6(const int16_t *in, int32_t *out, const int16_t *consts);
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void ff_sbc_analyze_4_neon(const int16_t *in, int32_t *out, const int16_t *consts);
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void ff_sbc_analyze_8_neon(const int16_t *in, int32_t *out, const int16_t *consts);
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void ff_sbc_calc_scalefactors_neon(int32_t sb_sample_f[16][2][8],
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uint32_t scale_factor[2][8],
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int blocks, int channels, int subbands);
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int ff_sbc_calc_scalefactors_j_neon(int32_t sb_sample_f[16][2][8],
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uint32_t scale_factor[2][8],
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int blocks, int subbands);
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int ff_sbc_enc_process_input_4s_neon(int position, const uint8_t *pcm,
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int16_t X[2][SBC_X_BUFFER_SIZE],
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int nsamples, int nchannels);
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int ff_sbc_enc_process_input_8s_neon(int position, const uint8_t *pcm,
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int16_t X[2][SBC_X_BUFFER_SIZE],
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int nsamples, int nchannels);
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DECLARE_ALIGNED(SBC_ALIGN, int32_t, ff_sbcdsp_joint_bits_mask)[8] = {
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8, 4, 2, 1, 128, 64, 32, 16
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};
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#if HAVE_BIGENDIAN
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#define PERM(a, b, c, d) { \
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(a * 2) + 1, (a * 2) + 0, \
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(b * 2) + 1, (b * 2) + 0, \
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(c * 2) + 1, (c * 2) + 0, \
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(d * 2) + 1, (d * 2) + 0 \
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}
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#else
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#define PERM(a, b, c, d) { \
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(a * 2) + 0, (a * 2) + 1, \
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(b * 2) + 0, (b * 2) + 1, \
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(c * 2) + 0, (c * 2) + 1, \
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(d * 2) + 0, (d * 2) + 1 \
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}
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#endif
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DECLARE_ALIGNED(SBC_ALIGN, uint8_t, ff_sbc_input_perm_4)[2][8] = {
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PERM(7, 3, 6, 4),
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PERM(0, 2, 1, 5)
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};
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DECLARE_ALIGNED(SBC_ALIGN, uint8_t, ff_sbc_input_perm_8)[4][8] = {
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PERM(15, 7, 14, 8),
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PERM(13, 9, 12, 10),
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PERM(11, 3, 6, 0),
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PERM( 5, 1, 4, 2)
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};
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av_cold void ff_sbcdsp_init_arm(SBCDSPContext *s)
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{
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int cpu_flags = av_get_cpu_flags();
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if (have_armv6(cpu_flags)) {
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s->sbc_analyze_4 = ff_sbc_analyze_4_armv6;
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s->sbc_analyze_8 = ff_sbc_analyze_8_armv6;
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}
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if (have_neon(cpu_flags)) {
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s->sbc_analyze_4 = ff_sbc_analyze_4_neon;
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s->sbc_analyze_8 = ff_sbc_analyze_8_neon;
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s->sbc_calc_scalefactors = ff_sbc_calc_scalefactors_neon;
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s->sbc_calc_scalefactors_j = ff_sbc_calc_scalefactors_j_neon;
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if (s->increment != 1) {
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s->sbc_enc_process_input_4s = ff_sbc_enc_process_input_4s_neon;
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s->sbc_enc_process_input_8s = ff_sbc_enc_process_input_8s_neon;
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}
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}
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}
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