FFmpeg
ac3dsp_init_arm.c
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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 
23 #include "libavutil/arm/cpu.h"
24 #include "libavutil/attributes.h"
25 #include "libavcodec/ac3dsp.h"
26 #include "config.h"
27 
28 void ff_ac3_exponent_min_neon(uint8_t *exp, int num_reuse_blocks, int nb_coefs);
29 void ff_float_to_fixed24_neon(int32_t *dst, const float *src, unsigned int len);
30 void ff_ac3_extract_exponents_neon(uint8_t *exp, int32_t *coef, int nb_coefs);
31 void ff_ac3_sum_square_butterfly_int32_neon(int64_t sum[4],
32  const int32_t *coef0,
33  const int32_t *coef1,
34  int len);
36  const float *coef0,
37  const float *coef1,
38  int len);
39 
40 void ff_ac3_bit_alloc_calc_bap_armv6(int16_t *mask, int16_t *psd,
41  int start, int end,
42  int snr_offset, int floor,
43  const uint8_t *bap_tab, uint8_t *bap);
44 
45 void ff_ac3_update_bap_counts_arm(uint16_t mant_cnt[16], uint8_t *bap, int len);
46 
48 {
50 
52 
53  if (have_armv6(cpu_flags)) {
55  }
56 
57  if (have_neon(cpu_flags)) {
63  }
64 }
void ff_ac3_exponent_min_neon(uint8_t *exp, int num_reuse_blocks, int nb_coefs)
void(* update_bap_counts)(uint16_t mant_cnt[16], uint8_t *bap, int len)
Update bap counts using the supplied array of bap.
Definition: ac3dsp.h:84
#define have_armv6(flags)
Definition: cpu.h:26
static atomic_int cpu_flags
Definition: cpu.c:50
Macro definitions for various function/variable attributes.
static __device__ float floor(float a)
Definition: cuda_runtime.h:173
void(* extract_exponents)(uint8_t *exp, int32_t *coef, int nb_coefs)
Definition: ac3dsp.h:94
void ff_ac3_update_bap_counts_arm(uint16_t mant_cnt[16], uint8_t *bap, int len)
uint8_t
#define av_cold
Definition: attributes.h:88
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
void(* bit_alloc_calc_bap)(int16_t *mask, int16_t *psd, int start, int end, int snr_offset, int floor, const uint8_t *bap_tab, uint8_t *bap)
Calculate bit allocation pointers.
Definition: ac3dsp.h:73
void ff_ac3_sum_square_butterfly_int32_neon(int64_t sum[4], const int32_t *coef0, const int32_t *coef1, int len)
#define src
Definition: vp8dsp.c:255
static const uint16_t mask[17]
Definition: lzw.c:38
static const uint8_t bap_tab[64]
Definition: dolby_e.c:589
int8_t exp
Definition: eval.c:72
void ff_ac3_sum_square_butterfly_float_neon(float sum[4], const float *coef0, const float *coef1, int len)
#define have_neon(flags)
Definition: cpu.h:26
int32_t
void(* sum_square_butterfly_int32)(int64_t sum[4], const int32_t *coef0, const int32_t *coef1, int len)
Definition: ac3dsp.h:96
void ff_float_to_fixed24_neon(int32_t *dst, const float *src, unsigned int len)
void ff_ac3_extract_exponents_neon(uint8_t *exp, int32_t *coef, int nb_coefs)
void ff_ac3_bit_alloc_calc_bap_armv6(int16_t *mask, int16_t *psd, int start, int end, int snr_offset, int floor, const uint8_t *bap_tab, uint8_t *bap)
av_cold void ff_ac3dsp_init_arm(AC3DSPContext *c, int bit_exact)
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:95
void(* ac3_exponent_min)(uint8_t *exp, int num_reuse_blocks, int nb_coefs)
Set each encoded exponent in a block to the minimum of itself and the exponents in the same frequency...
Definition: ac3dsp.h:43
int len
void(* sum_square_butterfly_float)(float sum[4], const float *coef0, const float *coef1, int len)
Definition: ac3dsp.h:99
void(* float_to_fixed24)(int32_t *dst, const float *src, unsigned int len)
Convert an array of float in range [-1.0,1.0] to int32_t with range [-(1<<24),(1<<24)].
Definition: ac3dsp.h:56