FFmpeg: libavcodec/arm/ac3dsp_init_arm.c Source File

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, size_t 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);

35 void ff_ac3_sum_square_butterfly_float_neon(float sum[4],

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

47 av_cold void ff_ac3dsp_init_arm(AC3DSPContext *c)

48 {

49 int cpu_flags = av_get_cpu_flags();

50

51 c->update_bap_counts = ff_ac3_update_bap_counts_arm;

52

53 if (have_armv6(cpu_flags)) {

54 c->bit_alloc_calc_bap = ff_ac3_bit_alloc_calc_bap_armv6;

55 }

56

57 if (have_neon(cpu_flags)) {

58 c->ac3_exponent_min = ff_ac3_exponent_min_neon;

59 c->float_to_fixed24 = ff_float_to_fixed24_neon;

60 c->extract_exponents = ff_ac3_extract_exponents_neon;

61 c->sum_square_butterfly_int32 = ff_ac3_sum_square_butterfly_int32_neon;

62 c->sum_square_butterfly_float = ff_ac3_sum_square_butterfly_float_neon;

63 }

64 }

static int nb_coefs(int length, int level, uint64_t sn)

Definition: af_afwtdn.c:515

long long int64_t

Definition: coverity.c:34

int mask

Definition: mediacodecdec_common.c:154

Definition: ac3dsp.h:34

ff_ac3_bit_alloc_calc_bap_armv6

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_get_cpu_flags

int av_get_cpu_flags(void)

Return the flags which specify extensions supported by the CPU.

Definition: cpu.c:109

ff_ac3_update_bap_counts_arm

void ff_ac3_update_bap_counts_arm(uint16_t mant_cnt[16], uint8_t *bap, int len)

static atomic_int cpu_flags

Definition: cpu.c:56

#define av_cold

Definition: attributes.h:106

ff_float_to_fixed24_neon

void ff_float_to_fixed24_neon(int32_t *dst, const float *src, size_t len)

static __device__ float floor(float a)

Definition: cuda_runtime.h:173

static const uint8_t bap_tab[64]

Definition: dolby_e.c:599

int8_t exp

Definition: eval.c:73

ff_ac3_sum_square_butterfly_int32_neon

void ff_ac3_sum_square_butterfly_int32_neon(int64_t sum[4], const int32_t *coef0, const int32_t *coef1, int len)

c

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

uint8_t ptrdiff_t const uint8_t ptrdiff_t int intptr_t intptr_t int int16_t * dst

Definition: dsp.h:87

ff_ac3dsp_init_arm

av_cold void ff_ac3dsp_init_arm(AC3DSPContext *c)

Definition: ac3dsp_init_arm.c:47

ff_ac3_sum_square_butterfly_float_neon

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

int len

Definition: vorbis_enc_data.h:426

ff_ac3_exponent_min_neon

void ff_ac3_exponent_min_neon(uint8_t *exp, int num_reuse_blocks, int nb_coefs)

ff_ac3_extract_exponents_neon

void ff_ac3_extract_exponents_neon(uint8_t *exp, int32_t *coef, int nb_coefs)

#define have_armv6(flags)

Definition: cpu.h:26

int32_t

Definition: audioconvert.c:56

#define src

Definition: vp8dsp.c:248

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