git.sesse.net Git - ffmpeg/blob - libavcodec/x86/ac3dsp_init.c

   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/mem.h"
  23 #include "libavutil/x86/asm.h"
  24 #include "libavutil/x86/cpu.h"
  25 #include "dsputil_mmx.h"
  26 #include "libavcodec/ac3.h"
  27 #include "libavcodec/ac3dsp.h"
  28
  29 extern void ff_ac3_exponent_min_mmx   (uint8_t *exp, int num_reuse_blocks, int nb_coefs);
  30 extern void ff_ac3_exponent_min_mmxext(uint8_t *exp, int num_reuse_blocks, int nb_coefs);
  31 extern void ff_ac3_exponent_min_sse2  (uint8_t *exp, int num_reuse_blocks, int nb_coefs);
  32
  33 extern int ff_ac3_max_msb_abs_int16_mmx  (const int16_t *src, int len);
  34 extern int ff_ac3_max_msb_abs_int16_mmxext(const int16_t *src, int len);
  35 extern int ff_ac3_max_msb_abs_int16_sse2 (const int16_t *src, int len);
  36 extern int ff_ac3_max_msb_abs_int16_ssse3(const int16_t *src, int len);
  37
  38 extern void ff_ac3_lshift_int16_mmx (int16_t *src, unsigned int len, unsigned int shift);
  39 extern void ff_ac3_lshift_int16_sse2(int16_t *src, unsigned int len, unsigned int shift);
  40
  41 extern void ff_ac3_rshift_int32_mmx (int32_t *src, unsigned int len, unsigned int shift);
  42 extern void ff_ac3_rshift_int32_sse2(int32_t *src, unsigned int len, unsigned int shift);
  43
  44 extern void ff_float_to_fixed24_3dnow(int32_t *dst, const float *src, unsigned int len);
  45 extern void ff_float_to_fixed24_sse  (int32_t *dst, const float *src, unsigned int len);
  46 extern void ff_float_to_fixed24_sse2 (int32_t *dst, const float *src, unsigned int len);
  47
  48 extern int ff_ac3_compute_mantissa_size_sse2(uint16_t mant_cnt[6][16]);
  49
  50 extern void ff_ac3_extract_exponents_3dnow(uint8_t *exp, int32_t *coef, int nb_coefs);
  51 extern void ff_ac3_extract_exponents_sse2 (uint8_t *exp, int32_t *coef, int nb_coefs);
  52 extern void ff_ac3_extract_exponents_ssse3(uint8_t *exp, int32_t *coef, int nb_coefs);
  53
  54 #if HAVE_SSE_INLINE
  55
  56 #define IF1(x) x
  57 #define IF0(x)
  58
  59 #define MIX5(mono, stereo)                                      \
  60     __asm__ volatile (                                          \
  61         "movss           0(%2), %%xmm5          \n"             \
  62         "movss           8(%2), %%xmm6          \n"             \
  63         "movss          24(%2), %%xmm7          \n"             \
  64         "shufps     $0, %%xmm5, %%xmm5          \n"             \
  65         "shufps     $0, %%xmm6, %%xmm6          \n"             \
  66         "shufps     $0, %%xmm7, %%xmm7          \n"             \
  67         "1:                                     \n"             \
  68         "movaps       (%0, %1), %%xmm0          \n"             \
  69         "movaps  0x400(%0, %1), %%xmm1          \n"             \
  70         "movaps  0x800(%0, %1), %%xmm2          \n"             \
  71         "movaps  0xc00(%0, %1), %%xmm3          \n"             \
  72         "movaps 0x1000(%0, %1), %%xmm4          \n"             \
  73         "mulps          %%xmm5, %%xmm0          \n"             \
  74         "mulps          %%xmm6, %%xmm1          \n"             \
  75         "mulps          %%xmm5, %%xmm2          \n"             \
  76         "mulps          %%xmm7, %%xmm3          \n"             \
  77         "mulps          %%xmm7, %%xmm4          \n"             \
  78  stereo("addps          %%xmm1, %%xmm0          \n")            \
  79         "addps          %%xmm1, %%xmm2          \n"             \
  80         "addps          %%xmm3, %%xmm0          \n"             \
  81         "addps          %%xmm4, %%xmm2          \n"             \
  82    mono("addps          %%xmm2, %%xmm0          \n")            \
  83         "movaps         %%xmm0, (%0, %1)        \n"             \
  84  stereo("movaps         %%xmm2, 0x400(%0, %1)   \n")            \
  85         "add               $16, %0              \n"             \
  86         "jl                 1b                  \n"             \
  87         : "+&r"(i)                                              \
  88         : "r"(samples[0] + len), "r"(matrix)                    \
  89         : XMM_CLOBBERS("%xmm0", "%xmm1", "%xmm2", "%xmm3",      \
  90                       "%xmm4", "%xmm5", "%xmm6", "%xmm7",)      \
  91          "memory"                                               \
  92     );
  93
  94 #define MIX_MISC(stereo)                                        \
  95     __asm__ volatile (                                          \
  96         "1:                                 \n"                 \
  97         "movaps     (%3, %0), %%xmm0        \n"                 \
  98  stereo("movaps       %%xmm0, %%xmm1        \n")                \
  99         "mulps        %%xmm4, %%xmm0        \n"                 \
 100  stereo("mulps        %%xmm5, %%xmm1        \n")                \
 101         "lea    1024(%3, %0), %1            \n"                 \
 102         "mov              %5, %2            \n"                 \
 103         "2:                                 \n"                 \
 104         "movaps         (%1), %%xmm2        \n"                 \
 105  stereo("movaps       %%xmm2, %%xmm3        \n")                \
 106         "mulps      (%4, %2), %%xmm2        \n"                 \
 107  stereo("mulps    16(%4, %2), %%xmm3        \n")                \
 108         "addps        %%xmm2, %%xmm0        \n"                 \
 109  stereo("addps        %%xmm3, %%xmm1        \n")                \
 110         "add           $1024, %1            \n"                 \
 111         "add             $32, %2            \n"                 \
 112         "jl               2b                \n"                 \
 113         "movaps       %%xmm0,     (%3, %0)  \n"                 \
 114  stereo("movaps       %%xmm1, 1024(%3, %0)  \n")                \
 115         "add             $16, %0            \n"                 \
 116         "jl               1b                \n"                 \
 117         : "+&r"(i), "=&r"(j), "=&r"(k)                          \
 118         : "r"(samples[0] + len), "r"(matrix_simd + in_ch),      \
 119           "g"((intptr_t) - 32 * (in_ch - 1))                    \
 120         : "memory"                                              \
 121     );
 122
 123 static void ac3_downmix_sse(float (*samples)[256], float (*matrix)[2],
 124                             int out_ch, int in_ch, int len)
 125 {
 126     int (*matrix_cmp)[2] = (int(*)[2])matrix;
 127     intptr_t i, j, k;
 128
 129     i = -len * sizeof(float);
 130     if (in_ch == 5 && out_ch == 2 &&
 131         !(matrix_cmp[0][1] | matrix_cmp[2][0]   |
 132           matrix_cmp[3][1] | matrix_cmp[4][0]   |
 133           (matrix_cmp[1][0] ^ matrix_cmp[1][1]) |
 134           (matrix_cmp[0][0] ^ matrix_cmp[2][1]))) {
 135         MIX5(IF0, IF1);
 136     } else if (in_ch == 5 && out_ch == 1 &&
 137                matrix_cmp[0][0] == matrix_cmp[2][0] &&
 138                matrix_cmp[3][0] == matrix_cmp[4][0]) {
 139         MIX5(IF1, IF0);
 140     } else {
 141         DECLARE_ALIGNED(16, float, matrix_simd)[AC3_MAX_CHANNELS][2][4];
 142         j = 2 * in_ch * sizeof(float);
 143         __asm__ volatile (
 144             "1:                                 \n"
 145             "sub             $8, %0             \n"
 146             "movss     (%2, %0), %%xmm4         \n"
 147             "movss    4(%2, %0), %%xmm5         \n"
 148             "shufps          $0, %%xmm4, %%xmm4 \n"
 149             "shufps          $0, %%xmm5, %%xmm5 \n"
 150             "movaps      %%xmm4,   (%1, %0, 4)  \n"
 151             "movaps      %%xmm5, 16(%1, %0, 4)  \n"
 152             "jg              1b                 \n"
 153             : "+&r"(j)
 154             : "r"(matrix_simd), "r"(matrix)
 155             : "memory"
 156         );
 157         if (out_ch == 2) {
 158             MIX_MISC(IF1);
 159         } else {
 160             MIX_MISC(IF0);
 161         }
 162     }
 163 }
 164
 165 #endif /* HAVE_SSE_INLINE */
 166
 167 av_cold void ff_ac3dsp_init_x86(AC3DSPContext *c, int bit_exact)
 168 {
 169     int mm_flags = av_get_cpu_flags();
 170
 171     if (EXTERNAL_MMX(mm_flags)) {
 172         c->ac3_exponent_min = ff_ac3_exponent_min_mmx;
 173         c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_mmx;
 174         c->ac3_lshift_int16 = ff_ac3_lshift_int16_mmx;
 175         c->ac3_rshift_int32 = ff_ac3_rshift_int32_mmx;
 176     }
 177     if (EXTERNAL_AMD3DNOW(mm_flags)) {
 178         c->extract_exponents = ff_ac3_extract_exponents_3dnow;
 179         if (!bit_exact) {
 180             c->float_to_fixed24 = ff_float_to_fixed24_3dnow;
 181         }
 182     }
 183     if (EXTERNAL_MMXEXT(mm_flags)) {
 184         c->ac3_exponent_min = ff_ac3_exponent_min_mmxext;
 185         c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_mmxext;
 186     }
 187     if (EXTERNAL_SSE(mm_flags)) {
 188         c->float_to_fixed24 = ff_float_to_fixed24_sse;
 189     }
 190     if (EXTERNAL_SSE2(mm_flags)) {
 191         c->ac3_exponent_min = ff_ac3_exponent_min_sse2;
 192         c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_sse2;
 193         c->float_to_fixed24 = ff_float_to_fixed24_sse2;
 194         c->compute_mantissa_size = ff_ac3_compute_mantissa_size_sse2;
 195         c->extract_exponents = ff_ac3_extract_exponents_sse2;
 196         if (!(mm_flags & AV_CPU_FLAG_SSE2SLOW)) {
 197             c->ac3_lshift_int16 = ff_ac3_lshift_int16_sse2;
 198             c->ac3_rshift_int32 = ff_ac3_rshift_int32_sse2;
 199         }
 200     }
 201     if (EXTERNAL_SSSE3(mm_flags)) {
 202         c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_ssse3;
 203         if (!(mm_flags & AV_CPU_FLAG_ATOM)) {
 204             c->extract_exponents = ff_ac3_extract_exponents_ssse3;
 205         }
 206     }
 207
 208 #if HAVE_SSE_INLINE
 209     if (INLINE_SSE(mm_flags)) {
 210         c->downmix = ac3_downmix_sse;
 211     }
 212 #endif
 213 }