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1 /*
2  * Copyright (c) 2011 Mans Rullgard <mans@mansr.com>
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20
21 #include <stdint.h>
22 #include "libavutil/attributes.h"
23 #include "libavcodec/ac3dsp.h"
24 #include "config.h"
25
26 void ff_ac3_exponent_min_neon(uint8_t *exp, int num_reuse_blocks, int nb_coefs);
27 int ff_ac3_max_msb_abs_int16_neon(const int16_t *src, int len);
28 void ff_ac3_lshift_int16_neon(int16_t *src, unsigned len, unsigned shift);
29 void ff_ac3_rshift_int32_neon(int32_t *src, unsigned len, unsigned shift);
30 void ff_float_to_fixed24_neon(int32_t *dst, const float *src, unsigned int len);
31 void ff_ac3_extract_exponents_neon(uint8_t *exp, int32_t *coef, int nb_coefs);
32 void ff_ac3_sum_square_butterfly_int32_neon(int64_t sum[4],
33                                             const int32_t *coef0,
34                                             const int32_t *coef1,
35                                             int len);
36 void ff_ac3_sum_square_butterfly_float_neon(float sum[4],
37                                             const float *coef0,
38                                             const float *coef1,
39                                             int len);
40
41 void ff_ac3_bit_alloc_calc_bap_armv6(int16_t *mask, int16_t *psd,
42                                      int start, int end,
43                                      int snr_offset, int floor,
44                                      const uint8_t *bap_tab, uint8_t *bap);
45
46 void ff_ac3_update_bap_counts_arm(uint16_t mant_cnt[16], uint8_t *bap, int len);
47
48 av_cold void ff_ac3dsp_init_arm(AC3DSPContext *c, int bit_exact)
49 {
50     c->update_bap_counts         = ff_ac3_update_bap_counts_arm;
51
52     if (HAVE_ARMV6) {
53         c->bit_alloc_calc_bap    = ff_ac3_bit_alloc_calc_bap_armv6;
54     }
55
56     if (HAVE_NEON) {
57         c->ac3_exponent_min      = ff_ac3_exponent_min_neon;
58         c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_neon;
59         c->ac3_lshift_int16      = ff_ac3_lshift_int16_neon;
60         c->ac3_rshift_int32      = ff_ac3_rshift_int32_neon;
61         c->float_to_fixed24      = ff_float_to_fixed24_neon;
62         c->extract_exponents     = ff_ac3_extract_exponents_neon;
63         c->sum_square_butterfly_int32 = ff_ac3_sum_square_butterfly_int32_neon;
64         c->sum_square_butterfly_float = ff_ac3_sum_square_butterfly_float_neon;
65     }
66 }