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ac3dsp_init.c
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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 #if ARCH_X86_32 && defined(__INTEL_COMPILER)
67 # undef HAVE_7REGS
68 # define HAVE_7REGS 0
69 #endif
70 
71 #if HAVE_SSE_INLINE && HAVE_7REGS
72 
73 #define IF1(x) x
74 #define IF0(x)
75 
76 #define MIX5(mono, stereo) \
77  __asm__ volatile ( \
78  "movss 0(%1), %%xmm5 \n" \
79  "movss 8(%1), %%xmm6 \n" \
80  "movss 24(%1), %%xmm7 \n" \
81  "shufps $0, %%xmm5, %%xmm5 \n" \
82  "shufps $0, %%xmm6, %%xmm6 \n" \
83  "shufps $0, %%xmm7, %%xmm7 \n" \
84  "1: \n" \
85  "movaps (%0, %2), %%xmm0 \n" \
86  "movaps (%0, %3), %%xmm1 \n" \
87  "movaps (%0, %4), %%xmm2 \n" \
88  "movaps (%0, %5), %%xmm3 \n" \
89  "movaps (%0, %6), %%xmm4 \n" \
90  "mulps %%xmm5, %%xmm0 \n" \
91  "mulps %%xmm6, %%xmm1 \n" \
92  "mulps %%xmm5, %%xmm2 \n" \
93  "mulps %%xmm7, %%xmm3 \n" \
94  "mulps %%xmm7, %%xmm4 \n" \
95  stereo("addps %%xmm1, %%xmm0 \n") \
96  "addps %%xmm1, %%xmm2 \n" \
97  "addps %%xmm3, %%xmm0 \n" \
98  "addps %%xmm4, %%xmm2 \n" \
99  mono("addps %%xmm2, %%xmm0 \n") \
100  "movaps %%xmm0, (%0, %2) \n" \
101  stereo("movaps %%xmm2, (%0, %3) \n") \
102  "add $16, %0 \n" \
103  "jl 1b \n" \
104  : "+&r"(i) \
105  : "r"(matrix), \
106  "r"(samples[0] + len), \
107  "r"(samples[1] + len), \
108  "r"(samples[2] + len), \
109  "r"(samples[3] + len), \
110  "r"(samples[4] + len) \
111  : XMM_CLOBBERS("%xmm0", "%xmm1", "%xmm2", "%xmm3", \
112  "%xmm4", "%xmm5", "%xmm6", "%xmm7",) \
113  "memory" \
114  );
115 
116 #define MIX_MISC(stereo) \
117  __asm__ volatile ( \
118  "mov %5, %2 \n" \
119  "1: \n" \
120  "mov -%c7(%6, %2, %c8), %3 \n" \
121  "movaps (%3, %0), %%xmm0 \n" \
122  stereo("movaps %%xmm0, %%xmm1 \n") \
123  "mulps %%xmm4, %%xmm0 \n" \
124  stereo("mulps %%xmm5, %%xmm1 \n") \
125  "2: \n" \
126  "mov (%6, %2, %c8), %1 \n" \
127  "movaps (%1, %0), %%xmm2 \n" \
128  stereo("movaps %%xmm2, %%xmm3 \n") \
129  "mulps (%4, %2, 8), %%xmm2 \n" \
130  stereo("mulps 16(%4, %2, 8), %%xmm3 \n") \
131  "addps %%xmm2, %%xmm0 \n" \
132  stereo("addps %%xmm3, %%xmm1 \n") \
133  "add $4, %2 \n" \
134  "jl 2b \n" \
135  "mov %5, %2 \n" \
136  stereo("mov (%6, %2, %c8), %1 \n") \
137  "movaps %%xmm0, (%3, %0) \n" \
138  stereo("movaps %%xmm1, (%1, %0) \n") \
139  "add $16, %0 \n" \
140  "jl 1b \n" \
141  : "+&r"(i), "=&r"(j), "=&r"(k), "=&r"(m) \
142  : "r"(matrix_simd + in_ch), \
143  "g"((intptr_t) - 4 * (in_ch - 1)), \
144  "r"(samp + in_ch), \
145  "i"(sizeof(float *)), "i"(sizeof(float *)/4) \
146  : "memory" \
147  );
148 
149 static void ac3_downmix_sse(float **samples, float (*matrix)[2],
150  int out_ch, int in_ch, int len)
151 {
152  int (*matrix_cmp)[2] = (int(*)[2])matrix;
153  intptr_t i, j, k, m;
154 
155  i = -len * sizeof(float);
156  if (in_ch == 5 && out_ch == 2 &&
157  !(matrix_cmp[0][1] | matrix_cmp[2][0] |
158  matrix_cmp[3][1] | matrix_cmp[4][0] |
159  (matrix_cmp[1][0] ^ matrix_cmp[1][1]) |
160  (matrix_cmp[0][0] ^ matrix_cmp[2][1]))) {
161  MIX5(IF0, IF1);
162  } else if (in_ch == 5 && out_ch == 1 &&
163  matrix_cmp[0][0] == matrix_cmp[2][0] &&
164  matrix_cmp[3][0] == matrix_cmp[4][0]) {
165  MIX5(IF1, IF0);
166  } else {
167  LOCAL_ALIGNED(16, float, matrix_simd, [AC3_MAX_CHANNELS], [2][4]);
168  float *samp[AC3_MAX_CHANNELS];
169 
170  for (j = 0; j < in_ch; j++)
171  samp[j] = samples[j] + len;
172 
173  j = 2 * in_ch * sizeof(float);
174  __asm__ volatile (
175  "1: \n"
176  "sub $8, %0 \n"
177  "movss (%2, %0), %%xmm4 \n"
178  "movss 4(%2, %0), %%xmm5 \n"
179  "shufps $0, %%xmm4, %%xmm4 \n"
180  "shufps $0, %%xmm5, %%xmm5 \n"
181  "movaps %%xmm4, (%1, %0, 4) \n"
182  "movaps %%xmm5, 16(%1, %0, 4) \n"
183  "jg 1b \n"
184  : "+&r"(j)
185  : "r"(matrix_simd), "r"(matrix)
186  : "memory"
187  );
188  if (out_ch == 2) {
189  MIX_MISC(IF1);
190  } else {
191  MIX_MISC(IF0);
192  }
193  }
194 }
195 
196 #endif /* HAVE_SSE_INLINE && HAVE_7REGS */
197 
199 {
200  int cpu_flags = av_get_cpu_flags();
201 
202  if (EXTERNAL_MMX(cpu_flags)) {
207  }
208  if (EXTERNAL_AMD3DNOW(cpu_flags)) {
209  if (!bit_exact) {
211  }
212  }
213  if (EXTERNAL_MMXEXT(cpu_flags)) {
216  if (bit_exact) {
218  } else {
220  }
221  }
222  if (EXTERNAL_SSE(cpu_flags)) {
224  }
225  if (EXTERNAL_SSE2(cpu_flags)) {
231  if (!(cpu_flags & AV_CPU_FLAG_SSE2SLOW)) {
234  }
235  if (bit_exact) {
237  } else if (!(cpu_flags & AV_CPU_FLAG_SSE2SLOW)) {
239  }
240  }
241  if (EXTERNAL_SSSE3(cpu_flags)) {
243  if (cpu_flags & AV_CPU_FLAG_ATOM) {
245  } else {
248  }
249  }
250 
251 #if HAVE_SSE_INLINE && HAVE_7REGS
252  if (INLINE_SSE(cpu_flags)) {
253  c->downmix = ac3_downmix_sse;
254  }
255 #endif
256 }
#define EXTERNAL_MMX(flags)
Definition: cpu.h:54
void(* ac3_rshift_int32)(int32_t *src, unsigned int len, unsigned int shift)
Right-shift each value in an array of int32_t by a specified amount.
Definition: ac3dsp.h:76
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:89
static int shift(int a, int b)
Definition: sonic.c:82
int ff_ac3_max_msb_abs_int16_sse2(const int16_t *src, int len)
Memory handling functions.
int ff_ac3_max_msb_abs_int16_mmx(const int16_t *src, int len)
#define IF1(x)
#define EXTERNAL_SSE(flags)
Definition: cpu.h:56
void ff_float_to_fixed24_3dnow(int32_t *dst, const float *src, unsigned int len)
Macro definitions for various function/variable attributes.
void ff_float_to_fixed24_sse2(int32_t *dst, const float *src, unsigned int len)
uint8_t
#define av_cold
Definition: attributes.h:82
void ff_ac3_extract_exponents_ssse3(uint8_t *exp, int32_t *coef, int nb_coefs)
int(* ac3_max_msb_abs_int16)(const int16_t *src, int len)
Calculate the maximum MSB of the absolute value of each element in an array of int16_t.
Definition: ac3dsp.h:54
void ff_ac3_rshift_int32_mmx(int32_t *src, unsigned int len, unsigned int shift)
void ff_ac3_lshift_int16_mmx(int16_t *src, unsigned int len, unsigned int shift)
void ff_ac3_lshift_int16_sse2(int16_t *src, unsigned int len, unsigned int shift)
#define AV_CPU_FLAG_ATOM
Atom processor, some SSSE3 instructions are slower.
Definition: cpu.h:42
#define AV_CPU_FLAG_SSE2SLOW
SSE2 supported, but usually not faster.
Definition: cpu.h:35
#define EXTERNAL_SSE2(flags)
Definition: cpu.h:57
void ff_ac3_exponent_min_sse2(uint8_t *exp, int num_reuse_blocks, int nb_coefs)
void ff_apply_window_int16_ssse3_atom(int16_t *output, const int16_t *input, const int16_t *window, unsigned int len)
av_cold void ff_ac3dsp_init_x86(AC3DSPContext *c, int bit_exact)
Definition: ac3dsp_init.c:198
void ff_apply_window_int16_round_mmxext(int16_t *output, const int16_t *input, const int16_t *window, unsigned int len)
#define AC3_MAX_CHANNELS
maximum number of channels, including coupling channel
Definition: ac3.h:31
void ff_ac3_rshift_int32_sse2(int32_t *src, unsigned int len, unsigned int shift)
int8_t exp
Definition: eval.c:64
static SDL_Window * window
Definition: ffplay.c:364
void ff_apply_window_int16_round_sse2(int16_t *output, const int16_t *input, const int16_t *window, unsigned int len)
int ff_ac3_max_msb_abs_int16_ssse3(const int16_t *src, int len)
#define IF0(x)
int32_t
void ff_apply_window_int16_sse2(int16_t *output, const int16_t *input, const int16_t *window, unsigned int len)
#define INLINE_SSE(flags)
Definition: cpu.h:83
#define src
Definition: vp9dsp.c:530
void(* extract_exponents)(uint8_t *exp, int32_t *coef, int nb_coefs)
Definition: ac3dsp.h:127
void ff_ac3_exponent_min_mmx(uint8_t *exp, int num_reuse_blocks, int nb_coefs)
void ff_ac3_exponent_min_mmxext(uint8_t *exp, int num_reuse_blocks, int nb_coefs)
void ff_apply_window_int16_mmxext(int16_t *output, const int16_t *input, const int16_t *window, unsigned int len)
void ff_apply_window_int16_ssse3(int16_t *output, const int16_t *input, const int16_t *window, unsigned int len)
int ff_ac3_max_msb_abs_int16_mmxext(const int16_t *src, int len)
void ff_float_to_fixed24_sse(int32_t *dst, const float *src, unsigned int len)
#define EXTERNAL_SSSE3(flags)
Definition: cpu.h:63
void(* apply_window_int16)(int16_t *output, const int16_t *input, const int16_t *window, unsigned int len)
Apply symmetric window in 16-bit fixed-point.
Definition: ac3dsp.h:152
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:76
int(* compute_mantissa_size)(uint16_t mant_cnt[6][16])
Calculate the number of bits needed to encode a set of mantissas.
Definition: ac3dsp.h:125
#define EXTERNAL_MMXEXT(flags)
Definition: cpu.h:55
#define LOCAL_ALIGNED(a, t, v,...)
Definition: internal.h:110
static double c[64]
void(* ac3_lshift_int16)(int16_t *src, unsigned int len, unsigned int shift)
Left-shift each value in an array of int16_t by a specified amount.
Definition: ac3dsp.h:65
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 ff_ac3_compute_mantissa_size_sse2(uint16_t mant_cnt[6][16])
int len
void(* downmix)(float **samples, float(*matrix)[2], int out_ch, int in_ch, int len)
Definition: ac3dsp.h:135
void ff_ac3_extract_exponents_sse2(uint8_t *exp, int32_t *coef, int nb_coefs)
#define EXTERNAL_AMD3DNOW(flags)
Definition: cpu.h:52
Common code between the AC-3 encoder and decoder.