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 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/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 ARCH_X86_32 && defined(__INTEL_COMPILER)
  55 #       undef HAVE_7REGS
  56 #       define HAVE_7REGS 0
  57 #endif
  58
  59 #if HAVE_SSE_INLINE && HAVE_7REGS
  60
  61 #define IF1(x) x
  62 #define IF0(x)
  63
  64 #define MIX5(mono, stereo)                                      \
  65     __asm__ volatile (                                          \
  66         "movss           0(%1), %%xmm5          \n"             \
  67         "movss           8(%1), %%xmm6          \n"             \
  68         "movss          24(%1), %%xmm7          \n"             \
  69         "shufps     $0, %%xmm5, %%xmm5          \n"             \
  70         "shufps     $0, %%xmm6, %%xmm6          \n"             \
  71         "shufps     $0, %%xmm7, %%xmm7          \n"             \
  72         "1:                                     \n"             \
  73         "movaps       (%0, %2), %%xmm0          \n"             \
  74         "movaps       (%0, %3), %%xmm1          \n"             \
  75         "movaps       (%0, %4), %%xmm2          \n"             \
  76         "movaps       (%0, %5), %%xmm3          \n"             \
  77         "movaps       (%0, %6), %%xmm4          \n"             \
  78         "mulps          %%xmm5, %%xmm0          \n"             \
  79         "mulps          %%xmm6, %%xmm1          \n"             \
  80         "mulps          %%xmm5, %%xmm2          \n"             \
  81         "mulps          %%xmm7, %%xmm3          \n"             \
  82         "mulps          %%xmm7, %%xmm4          \n"             \
  83  stereo("addps          %%xmm1, %%xmm0          \n")            \
  84         "addps          %%xmm1, %%xmm2          \n"             \
  85         "addps          %%xmm3, %%xmm0          \n"             \
  86         "addps          %%xmm4, %%xmm2          \n"             \
  87    mono("addps          %%xmm2, %%xmm0          \n")            \
  88         "movaps         %%xmm0, (%0, %2)        \n"             \
  89  stereo("movaps         %%xmm2, (%0, %3)        \n")            \
  90         "add               $16, %0              \n"             \
  91         "jl                 1b                  \n"             \
  92         : "+&r"(i)                                              \
  93         : "r"(matrix),                                          \
  94           "r"(samples[0] + len),                                \
  95           "r"(samples[1] + len),                                \
  96           "r"(samples[2] + len),                                \
  97           "r"(samples[3] + len),                                \
  98           "r"(samples[4] + len)                                 \
  99         : XMM_CLOBBERS("%xmm0", "%xmm1", "%xmm2", "%xmm3",      \
 100                       "%xmm4", "%xmm5", "%xmm6", "%xmm7",)      \
 101          "memory"                                               \
 102     );
 103
 104 #define MIX_MISC(stereo)                                        \
 105     __asm__ volatile (                                          \
 106         "mov              %5, %2            \n"                 \
 107         "1:                                 \n"                 \
 108         "mov -%c7(%6, %2, %c8), %3          \n"                 \
 109         "movaps     (%3, %0), %%xmm0        \n"                 \
 110  stereo("movaps       %%xmm0, %%xmm1        \n")                \
 111         "mulps        %%xmm4, %%xmm0        \n"                 \
 112  stereo("mulps        %%xmm5, %%xmm1        \n")                \
 113         "2:                                 \n"                 \
 114         "mov   (%6, %2, %c8), %1            \n"                 \
 115         "movaps     (%1, %0), %%xmm2        \n"                 \
 116  stereo("movaps       %%xmm2, %%xmm3        \n")                \
 117         "mulps   (%4, %2, 8), %%xmm2        \n"                 \
 118  stereo("mulps 16(%4, %2, 8), %%xmm3        \n")                \
 119         "addps        %%xmm2, %%xmm0        \n"                 \
 120  stereo("addps        %%xmm3, %%xmm1        \n")                \
 121         "add              $4, %2            \n"                 \
 122         "jl               2b                \n"                 \
 123         "mov              %5, %2            \n"                 \
 124  stereo("mov   (%6, %2, %c8), %1            \n")                \
 125         "movaps       %%xmm0, (%3, %0)      \n"                 \
 126  stereo("movaps       %%xmm1, (%1, %0)      \n")                \
 127         "add             $16, %0            \n"                 \
 128         "jl               1b                \n"                 \
 129         : "+&r"(i), "=&r"(j), "=&r"(k), "=&r"(m)                \
 130         : "r"(matrix_simd + in_ch),                             \
 131           "g"((intptr_t) - 4 * (in_ch - 1)),                    \
 132           "r"(samp + in_ch),                                    \
 133           "i"(sizeof(float *)), "i"(sizeof(float *)/4)          \
 134         : "memory"                                              \
 135     );
 136
 137 static void ac3_downmix_sse(float **samples, float (*matrix)[2],
 138                             int out_ch, int in_ch, int len)
 139 {
 140     int (*matrix_cmp)[2] = (int(*)[2])matrix;
 141     intptr_t i, j, k, m;
 142
 143     i = -len * sizeof(float);
 144     if (in_ch == 5 && out_ch == 2 &&
 145         !(matrix_cmp[0][1] | matrix_cmp[2][0]   |
 146           matrix_cmp[3][1] | matrix_cmp[4][0]   |
 147           (matrix_cmp[1][0] ^ matrix_cmp[1][1]) |
 148           (matrix_cmp[0][0] ^ matrix_cmp[2][1]))) {
 149         MIX5(IF0, IF1);
 150     } else if (in_ch == 5 && out_ch == 1 &&
 151                matrix_cmp[0][0] == matrix_cmp[2][0] &&
 152                matrix_cmp[3][0] == matrix_cmp[4][0]) {
 153         MIX5(IF1, IF0);
 154     } else {
 155         DECLARE_ALIGNED(16, float, matrix_simd)[AC3_MAX_CHANNELS][2][4];
 156         float *samp[AC3_MAX_CHANNELS];
 157
 158         for (j = 0; j < in_ch; j++)
 159             samp[j] = samples[j] + len;
 160
 161         j = 2 * in_ch * sizeof(float);
 162         __asm__ volatile (
 163             "1:                                 \n"
 164             "sub             $8, %0             \n"
 165             "movss     (%2, %0), %%xmm4         \n"
 166             "movss    4(%2, %0), %%xmm5         \n"
 167             "shufps          $0, %%xmm4, %%xmm4 \n"
 168             "shufps          $0, %%xmm5, %%xmm5 \n"
 169             "movaps      %%xmm4,   (%1, %0, 4)  \n"
 170             "movaps      %%xmm5, 16(%1, %0, 4)  \n"
 171             "jg              1b                 \n"
 172             : "+&r"(j)
 173             : "r"(matrix_simd), "r"(matrix)
 174             : "memory"
 175         );
 176         if (out_ch == 2) {
 177             MIX_MISC(IF1);
 178         } else {
 179             MIX_MISC(IF0);
 180         }
 181     }
 182 }
 183
 184 #endif /* HAVE_SSE_INLINE && HAVE_7REGS */
 185
 186 av_cold void ff_ac3dsp_init_x86(AC3DSPContext *c, int bit_exact)
 187 {
 188     int mm_flags = av_get_cpu_flags();
 189
 190     if (EXTERNAL_MMX(mm_flags)) {
 191         c->ac3_exponent_min = ff_ac3_exponent_min_mmx;
 192         c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_mmx;
 193         c->ac3_lshift_int16 = ff_ac3_lshift_int16_mmx;
 194         c->ac3_rshift_int32 = ff_ac3_rshift_int32_mmx;
 195     }
 196     if (EXTERNAL_AMD3DNOW(mm_flags)) {
 197         c->extract_exponents = ff_ac3_extract_exponents_3dnow;
 198         if (!bit_exact) {
 199             c->float_to_fixed24 = ff_float_to_fixed24_3dnow;
 200         }
 201     }
 202     if (EXTERNAL_MMXEXT(mm_flags)) {
 203         c->ac3_exponent_min = ff_ac3_exponent_min_mmxext;
 204         c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_mmxext;
 205     }
 206     if (EXTERNAL_SSE(mm_flags)) {
 207         c->float_to_fixed24 = ff_float_to_fixed24_sse;
 208     }
 209     if (EXTERNAL_SSE2(mm_flags)) {
 210         c->ac3_exponent_min = ff_ac3_exponent_min_sse2;
 211         c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_sse2;
 212         c->float_to_fixed24 = ff_float_to_fixed24_sse2;
 213         c->compute_mantissa_size = ff_ac3_compute_mantissa_size_sse2;
 214         c->extract_exponents = ff_ac3_extract_exponents_sse2;
 215         if (!(mm_flags & AV_CPU_FLAG_SSE2SLOW)) {
 216             c->ac3_lshift_int16 = ff_ac3_lshift_int16_sse2;
 217             c->ac3_rshift_int32 = ff_ac3_rshift_int32_sse2;
 218         }
 219     }
 220     if (EXTERNAL_SSSE3(mm_flags)) {
 221         c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_ssse3;
 222         if (!(mm_flags & AV_CPU_FLAG_ATOM)) {
 223             c->extract_exponents = ff_ac3_extract_exponents_ssse3;
 224         }
 225     }
 226
 227 #if HAVE_SSE_INLINE && HAVE_7REGS
 228     if (INLINE_SSE(mm_flags)) {
 229         c->downmix = ac3_downmix_sse;
 230     }
 231 #endif
 232 }