ac3dsp_mmx.c
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1 /*
2  * x86-optimized AC-3 DSP utils
3  * Copyright (c) 2011 Justin Ruggles
4  *
5  * This file is part of Libav.
6  *
7  * Libav 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  * Libav 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 Libav; 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/x86_cpu.h"
23 #include "dsputil_mmx.h"
24 #include "libavcodec/ac3dsp.h"
25 
26 extern void ff_ac3_exponent_min_mmx (uint8_t *exp, int num_reuse_blocks, int nb_coefs);
27 extern void ff_ac3_exponent_min_mmxext(uint8_t *exp, int num_reuse_blocks, int nb_coefs);
28 extern void ff_ac3_exponent_min_sse2 (uint8_t *exp, int num_reuse_blocks, int nb_coefs);
29 
30 extern int ff_ac3_max_msb_abs_int16_mmxext(const int16_t *src, int len);
31 extern int ff_ac3_max_msb_abs_int16_sse2 (const int16_t *src, int len);
32 extern int ff_ac3_max_msb_abs_int16_ssse3 (const int16_t *src, int len);
33 
34 extern void ff_ac3_lshift_int16_mmx (int16_t *src, unsigned int len, unsigned int shift);
35 extern void ff_ac3_lshift_int16_sse2(int16_t *src, unsigned int len, unsigned int shift);
36 
37 extern void ff_ac3_rshift_int32_mmx (int32_t *src, unsigned int len, unsigned int shift);
38 extern void ff_ac3_rshift_int32_sse2(int32_t *src, unsigned int len, unsigned int shift);
39 
40 extern void ff_float_to_fixed24_3dnow(int32_t *dst, const float *src, unsigned int len);
41 extern void ff_float_to_fixed24_sse (int32_t *dst, const float *src, unsigned int len);
42 extern void ff_float_to_fixed24_sse2 (int32_t *dst, const float *src, unsigned int len);
43 
44 extern int ff_ac3_compute_mantissa_size_sse2(uint16_t mant_cnt[6][16]);
45 
46 extern void ff_ac3_extract_exponents_3dnow(uint8_t *exp, int32_t *coef, int nb_coefs);
47 extern void ff_ac3_extract_exponents_sse2 (uint8_t *exp, int32_t *coef, int nb_coefs);
48 extern void ff_ac3_extract_exponents_ssse3(uint8_t *exp, int32_t *coef, int nb_coefs);
49 
50 av_cold void ff_ac3dsp_init_x86(AC3DSPContext *c, int bit_exact)
51 {
52 #if HAVE_YASM
53  int mm_flags = av_get_cpu_flags();
54 
55  if (mm_flags & AV_CPU_FLAG_MMX) {
59  }
60  if (mm_flags & AV_CPU_FLAG_3DNOW && HAVE_AMD3DNOW) {
62  if (!bit_exact) {
64  }
65  }
66  if (mm_flags & AV_CPU_FLAG_MMX2 && HAVE_MMX2) {
69  }
70  if (mm_flags & AV_CPU_FLAG_SSE && HAVE_SSE) {
72  }
73  if (mm_flags & AV_CPU_FLAG_SSE2 && HAVE_SSE) {
79  if (!(mm_flags & AV_CPU_FLAG_SSE2SLOW)) {
82  }
83  }
84  if (mm_flags & AV_CPU_FLAG_SSSE3 && HAVE_SSSE3) {
86  if (!(mm_flags & AV_CPU_FLAG_ATOM)) {
88  }
89  }
90 #endif
91 }