2 * Bluetooth low-complexity, subband codec (SBC)
4 * Copyright (C) 2017 Aurelien Jacobs <aurel@gnuage.org>
5 * Copyright (C) 2008-2010 Nokia Corporation
6 * Copyright (C) 2004-2010 Marcel Holtmann <marcel@holtmann.org>
7 * Copyright (C) 2004-2005 Henryk Ploetz <henryk@ploetzli.ch>
8 * Copyright (C) 2005-2006 Brad Midgley <bmidgley@xmission.com>
10 * This file is part of FFmpeg.
12 * FFmpeg is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU Lesser General Public
14 * License as published by the Free Software Foundation; either
15 * version 2.1 of the License, or (at your option) any later version.
17 * FFmpeg is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * Lesser General Public License for more details.
22 * You should have received a copy of the GNU Lesser General Public
23 * License along with FFmpeg; if not, write to the Free Software
24 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
29 * SBC ARMv6 optimization for some basic "building bricks"
32 #include "libavutil/cpu.h"
33 #include "libavutil/arm/cpu.h"
34 #include "libavcodec/sbcdsp.h"
36 void ff_sbc_analyze_4_armv6(const int16_t *in, int32_t *out, const int16_t *consts);
37 void ff_sbc_analyze_8_armv6(const int16_t *in, int32_t *out, const int16_t *consts);
39 void ff_sbc_analyze_4_neon(const int16_t *in, int32_t *out, const int16_t *consts);
40 void ff_sbc_analyze_8_neon(const int16_t *in, int32_t *out, const int16_t *consts);
41 void ff_sbc_calc_scalefactors_neon(int32_t sb_sample_f[16][2][8],
42 uint32_t scale_factor[2][8],
43 int blocks, int channels, int subbands);
44 int ff_sbc_calc_scalefactors_j_neon(int32_t sb_sample_f[16][2][8],
45 uint32_t scale_factor[2][8],
46 int blocks, int subbands);
47 int ff_sbc_enc_process_input_4s_neon(int position, const uint8_t *pcm,
48 int16_t X[2][SBC_X_BUFFER_SIZE],
49 int nsamples, int nchannels);
50 int ff_sbc_enc_process_input_8s_neon(int position, const uint8_t *pcm,
51 int16_t X[2][SBC_X_BUFFER_SIZE],
52 int nsamples, int nchannels);
54 DECLARE_ALIGNED(SBC_ALIGN, int32_t, ff_sbcdsp_joint_bits_mask)[8] = {
55 8, 4, 2, 1, 128, 64, 32, 16
59 #define PERM(a, b, c, d) { \
60 (a * 2) + 1, (a * 2) + 0, \
61 (b * 2) + 1, (b * 2) + 0, \
62 (c * 2) + 1, (c * 2) + 0, \
63 (d * 2) + 1, (d * 2) + 0 \
66 #define PERM(a, b, c, d) { \
67 (a * 2) + 0, (a * 2) + 1, \
68 (b * 2) + 0, (b * 2) + 1, \
69 (c * 2) + 0, (c * 2) + 1, \
70 (d * 2) + 0, (d * 2) + 1 \
74 DECLARE_ALIGNED(SBC_ALIGN, uint8_t, ff_sbc_input_perm_4)[2][8] = {
79 DECLARE_ALIGNED(SBC_ALIGN, uint8_t, ff_sbc_input_perm_8)[4][8] = {
86 av_cold void ff_sbcdsp_init_arm(SBCDSPContext *s)
88 int cpu_flags = av_get_cpu_flags();
90 if (have_armv6(cpu_flags)) {
91 s->sbc_analyze_4 = ff_sbc_analyze_4_armv6;
92 s->sbc_analyze_8 = ff_sbc_analyze_8_armv6;
95 if (have_neon(cpu_flags)) {
96 s->sbc_analyze_4 = ff_sbc_analyze_4_neon;
97 s->sbc_analyze_8 = ff_sbc_analyze_8_neon;
98 s->sbc_calc_scalefactors = ff_sbc_calc_scalefactors_neon;
99 s->sbc_calc_scalefactors_j = ff_sbc_calc_scalefactors_j_neon;
100 if (s->increment != 1) {
101 s->sbc_enc_process_input_4s = ff_sbc_enc_process_input_4s_neon;
102 s->sbc_enc_process_input_8s = ff_sbc_enc_process_input_8s_neon;