FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/x86/ac3dsp_init.c
Date: 2026-01-23 19:11:46
Exec Total Coverage
Lines: 20 20 100.0%
Functions: 2 2 100.0%
Branches: 33 84 39.3%
Line Branch Exec Source
1 /*
2 * x86-optimized AC-3 DSP functions
3 * Copyright (c) 2011 Justin Ruggles
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "libavutil/attributes.h"
23 #include "libavutil/x86/asm.h"
24 #include "libavutil/x86/cpu.h"
25 #include "libavcodec/ac3dsp.h"
26
27 void ff_ac3_exponent_min_sse2 (uint8_t *exp, int num_reuse_blocks, int nb_coefs);
28
29 void ff_float_to_fixed24_sse2 (int32_t *dst, const float *src, size_t len);
30 void ff_float_to_fixed24_avx (int32_t *dst, const float *src, size_t len);
31
32 int ff_ac3_compute_mantissa_size_sse2(uint16_t mant_cnt[6][16]);
33
34 void ff_ac3_extract_exponents_sse2 (uint8_t *exp, int32_t *coef, int nb_coefs);
35 void ff_ac3_extract_exponents_ssse3(uint8_t *exp, int32_t *coef, int nb_coefs);
36
37 126 av_cold void ff_ac3dsp_init_x86(AC3DSPContext *c)
38 {
39 126 int cpu_flags = av_get_cpu_flags();
40
41
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 126 if (EXTERNAL_SSE2(cpu_flags)) {
42 40 c->ac3_exponent_min = ff_ac3_exponent_min_sse2;
43 40 c->float_to_fixed24 = ff_float_to_fixed24_sse2;
44 40 c->compute_mantissa_size = ff_ac3_compute_mantissa_size_sse2;
45 40 c->extract_exponents = ff_ac3_extract_exponents_sse2;
46 }
47
48
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 126 if (EXTERNAL_SSSE3(cpu_flags)) {
49
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 38 if (!(cpu_flags & AV_CPU_FLAG_ATOM))
50 38 c->extract_exponents = ff_ac3_extract_exponents_ssse3;
51 }
52
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 126 if (EXTERNAL_AVX_FAST(cpu_flags)) {
53 33 c->float_to_fixed24 = ff_float_to_fixed24_avx;
54 }
55 126 }
56
57 #define DOWNMIX_FUNC_OPT(ch, opt) \
58 void ff_ac3_downmix_ ## ch ## _to_1_ ## opt(float **samples, \
59 float **matrix, int len); \
60 void ff_ac3_downmix_ ## ch ## _to_2_ ## opt(float **samples, \
61 float **matrix, int len);
62
63 #define DOWNMIX_FUNCS(opt) \
64 DOWNMIX_FUNC_OPT(3, opt) \
65 DOWNMIX_FUNC_OPT(4, opt) \
66 DOWNMIX_FUNC_OPT(5, opt) \
67 DOWNMIX_FUNC_OPT(6, opt)
68
69 DOWNMIX_FUNCS(sse)
70 DOWNMIX_FUNCS(avx)
71 DOWNMIX_FUNCS(fma3)
72
73 11 void ff_ac3dsp_set_downmix_x86(AC3DSPContext *c)
74 {
75 11 int cpu_flags = av_get_cpu_flags();
76
77 #define SET_DOWNMIX(ch, suf, SUF) \
78 if (ch == c->in_channels) { \
79 if (EXTERNAL_ ## SUF (cpu_flags)) { \
80 if (c->out_channels == 1) \
81 c->downmix = ff_ac3_downmix_ ## ch ## _to_1_ ## suf; \
82 else \
83 c->downmix = ff_ac3_downmix_ ## ch ## _to_2_ ## suf; \
84 } \
85 }
86
87 #define SET_DOWNMIX_ALL(suf, SUF) \
88 SET_DOWNMIX(3, suf, SUF) \
89 SET_DOWNMIX(4, suf, SUF) \
90 SET_DOWNMIX(5, suf, SUF) \
91 SET_DOWNMIX(6, suf, SUF)
92
93
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 11 SET_DOWNMIX_ALL(sse, SSE)
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 11 if (!(cpu_flags & AV_CPU_FLAG_AVXSLOW)) {
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 11 SET_DOWNMIX_ALL(avx, AVX)
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 11 SET_DOWNMIX_ALL(fma3, FMA3)
97 }
98 11 }
99