Fix missing used attribute for inline assembly variables
[ffmpeg.git] / libavcodec / x86 / ac3dsp_init.c
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/mem.h"
24 #include "libavutil/x86/asm.h"
25 #include "libavutil/x86/cpu.h"
26 #include "libavcodec/ac3.h"
27 #include "libavcodec/ac3dsp.h"
28
29 void ff_ac3_exponent_min_mmx   (uint8_t *exp, int num_reuse_blocks, int nb_coefs);
30 void ff_ac3_exponent_min_mmxext(uint8_t *exp, int num_reuse_blocks, int nb_coefs);
31 void ff_ac3_exponent_min_sse2  (uint8_t *exp, int num_reuse_blocks, int nb_coefs);
32
33 int ff_ac3_max_msb_abs_int16_mmx  (const int16_t *src, int len);
34 int ff_ac3_max_msb_abs_int16_mmxext(const int16_t *src, int len);
35 int ff_ac3_max_msb_abs_int16_sse2 (const int16_t *src, int len);
36 int ff_ac3_max_msb_abs_int16_ssse3(const int16_t *src, int len);
37
38 void ff_ac3_lshift_int16_mmx (int16_t *src, unsigned int len, unsigned int shift);
39 void ff_ac3_lshift_int16_sse2(int16_t *src, unsigned int len, unsigned int shift);
40
41 void ff_ac3_rshift_int32_mmx (int32_t *src, unsigned int len, unsigned int shift);
42 void ff_ac3_rshift_int32_sse2(int32_t *src, unsigned int len, unsigned int shift);
43
44 void ff_float_to_fixed24_3dnow(int32_t *dst, const float *src, unsigned int len);
45 void ff_float_to_fixed24_sse  (int32_t *dst, const float *src, unsigned int len);
46 void ff_float_to_fixed24_sse2 (int32_t *dst, const float *src, unsigned int len);
47
48 int ff_ac3_compute_mantissa_size_sse2(uint16_t mant_cnt[6][16]);
49
50 void ff_ac3_extract_exponents_sse2 (uint8_t *exp, int32_t *coef, int nb_coefs);
51 void ff_ac3_extract_exponents_ssse3(uint8_t *exp, int32_t *coef, int nb_coefs);
52
53 void ff_apply_window_int16_round_mmxext(int16_t *output, const int16_t *input,
54                                         const int16_t *window, unsigned int len);
55 void ff_apply_window_int16_round_sse2(int16_t *output, const int16_t *input,
56                                       const int16_t *window, unsigned int len);
57 void ff_apply_window_int16_mmxext(int16_t *output, const int16_t *input,
58                                   const int16_t *window, unsigned int len);
59 void ff_apply_window_int16_sse2(int16_t *output, const int16_t *input,
60                                 const int16_t *window, unsigned int len);
61 void ff_apply_window_int16_ssse3(int16_t *output, const int16_t *input,
62                                  const int16_t *window, unsigned int len);
63 void ff_apply_window_int16_ssse3_atom(int16_t *output, const int16_t *input,
64                                       const int16_t *window, unsigned int len);
65
66 av_cold void ff_ac3dsp_init_x86(AC3DSPContext *c, int bit_exact)
67 {
68     int cpu_flags = av_get_cpu_flags();
69
70     if (EXTERNAL_MMX(cpu_flags)) {
71         c->ac3_exponent_min = ff_ac3_exponent_min_mmx;
72         c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_mmx;
73         c->ac3_lshift_int16 = ff_ac3_lshift_int16_mmx;
74         c->ac3_rshift_int32 = ff_ac3_rshift_int32_mmx;
75     }
76     if (EXTERNAL_AMD3DNOW(cpu_flags)) {
77         if (!bit_exact) {
78             c->float_to_fixed24 = ff_float_to_fixed24_3dnow;
79         }
80     }
81     if (EXTERNAL_MMXEXT(cpu_flags)) {
82         c->ac3_exponent_min = ff_ac3_exponent_min_mmxext;
83         c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_mmxext;
84         if (bit_exact) {
85             c->apply_window_int16 = ff_apply_window_int16_mmxext;
86         } else {
87             c->apply_window_int16 = ff_apply_window_int16_round_mmxext;
88         }
89     }
90     if (EXTERNAL_SSE(cpu_flags)) {
91         c->float_to_fixed24 = ff_float_to_fixed24_sse;
92     }
93     if (EXTERNAL_SSE2(cpu_flags)) {
94         c->ac3_exponent_min = ff_ac3_exponent_min_sse2;
95         c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_sse2;
96         c->float_to_fixed24 = ff_float_to_fixed24_sse2;
97         c->compute_mantissa_size = ff_ac3_compute_mantissa_size_sse2;
98         c->extract_exponents = ff_ac3_extract_exponents_sse2;
99         if (bit_exact) {
100             c->apply_window_int16 = ff_apply_window_int16_sse2;
101         }
102     }
103
104     if (EXTERNAL_SSE2_FAST(cpu_flags)) {
105         c->ac3_lshift_int16 = ff_ac3_lshift_int16_sse2;
106         c->ac3_rshift_int32 = ff_ac3_rshift_int32_sse2;
107         if (!bit_exact) {
108             c->apply_window_int16 = ff_apply_window_int16_round_sse2;
109         }
110     }
111
112     if (EXTERNAL_SSSE3(cpu_flags)) {
113         c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_ssse3;
114         if (cpu_flags & AV_CPU_FLAG_ATOM) {
115             c->apply_window_int16 = ff_apply_window_int16_ssse3_atom;
116         } else {
117             c->extract_exponents = ff_ac3_extract_exponents_ssse3;
118             c->apply_window_int16 = ff_apply_window_int16_ssse3;
119         }
120     }
121 }
122
123 #define DOWNMIX_FUNC_OPT(ch, opt)                                       \
124 void ff_ac3_downmix_ ## ch ## _to_1_ ## opt(float **samples,            \
125                                             float **matrix, int len);   \
126 void ff_ac3_downmix_ ## ch ## _to_2_ ## opt(float **samples,            \
127                                             float **matrix, int len);
128
129 #define DOWNMIX_FUNCS(opt)   \
130     DOWNMIX_FUNC_OPT(3, opt) \
131     DOWNMIX_FUNC_OPT(4, opt) \
132     DOWNMIX_FUNC_OPT(5, opt) \
133     DOWNMIX_FUNC_OPT(6, opt)
134
135 DOWNMIX_FUNCS(sse)
136 DOWNMIX_FUNCS(avx)
137 DOWNMIX_FUNCS(fma3)
138
139 void ff_ac3dsp_set_downmix_x86(AC3DSPContext *c)
140 {
141     int cpu_flags = av_get_cpu_flags();
142
143 #define SET_DOWNMIX(ch, suf, SUF)                                       \
144     if (ch == c->in_channels) {                                         \
145         if (EXTERNAL_ ## SUF (cpu_flags)) {                             \
146             if (c->out_channels == 1)                                   \
147                 c->downmix = ff_ac3_downmix_ ## ch ## _to_1_ ## suf;    \
148             else                                                        \
149                 c->downmix = ff_ac3_downmix_ ## ch ## _to_2_ ## suf;    \
150         }                                                               \
151     }
152
153 #define SET_DOWNMIX_ALL(suf, SUF)                   \
154     SET_DOWNMIX(3, suf, SUF)                        \
155     SET_DOWNMIX(4, suf, SUF)                        \
156     SET_DOWNMIX(5, suf, SUF)                        \
157     SET_DOWNMIX(6, suf, SUF)
158
159     SET_DOWNMIX_ALL(sse,  SSE)
160     if (!(cpu_flags & AV_CPU_FLAG_AVXSLOW)) {
161         SET_DOWNMIX_ALL(avx,  AVX)
162         SET_DOWNMIX_ALL(fma3, FMA3)
163     }
164 }