git.sesse.net Git - ffmpeg/blob - 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 #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
 198 av_cold void ff_ac3dsp_init_x86(AC3DSPContext *c, int bit_exact)
 199 {
 200     int cpu_flags = av_get_cpu_flags();
 201
 202     if (EXTERNAL_MMX(cpu_flags)) {
 203         c->ac3_exponent_min = ff_ac3_exponent_min_mmx;
 204         c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_mmx;
 205         c->ac3_lshift_int16 = ff_ac3_lshift_int16_mmx;
 206         c->ac3_rshift_int32 = ff_ac3_rshift_int32_mmx;
 207     }
 208     if (EXTERNAL_AMD3DNOW(cpu_flags)) {
 209         if (!bit_exact) {
 210             c->float_to_fixed24 = ff_float_to_fixed24_3dnow;
 211         }
 212     }
 213     if (EXTERNAL_MMXEXT(cpu_flags)) {
 214         c->ac3_exponent_min = ff_ac3_exponent_min_mmxext;
 215         c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_mmxext;
 216         if (bit_exact) {
 217             c->apply_window_int16 = ff_apply_window_int16_mmxext;
 218         } else {
 219             c->apply_window_int16 = ff_apply_window_int16_round_mmxext;
 220         }
 221     }
 222     if (EXTERNAL_SSE(cpu_flags)) {
 223         c->float_to_fixed24 = ff_float_to_fixed24_sse;
 224     }
 225     if (EXTERNAL_SSE2(cpu_flags)) {
 226         c->ac3_exponent_min = ff_ac3_exponent_min_sse2;
 227         c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_sse2;
 228         c->float_to_fixed24 = ff_float_to_fixed24_sse2;
 229         c->compute_mantissa_size = ff_ac3_compute_mantissa_size_sse2;
 230         c->extract_exponents = ff_ac3_extract_exponents_sse2;
 231         if (bit_exact) {
 232             c->apply_window_int16 = ff_apply_window_int16_sse2;
 233         }
 234     }
 235
 236     if (EXTERNAL_SSE2_FAST(cpu_flags)) {
 237         c->ac3_lshift_int16 = ff_ac3_lshift_int16_sse2;
 238         c->ac3_rshift_int32 = ff_ac3_rshift_int32_sse2;
 239         if (!bit_exact) {
 240             c->apply_window_int16 = ff_apply_window_int16_round_sse2;
 241         }
 242     }
 243
 244     if (EXTERNAL_SSSE3(cpu_flags)) {
 245         c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_ssse3;
 246         if (cpu_flags & AV_CPU_FLAG_ATOM) {
 247             c->apply_window_int16 = ff_apply_window_int16_ssse3_atom;
 248         } else {
 249             c->extract_exponents = ff_ac3_extract_exponents_ssse3;
 250             c->apply_window_int16 = ff_apply_window_int16_ssse3;
 251         }
 252     }
 253
 254 #if HAVE_SSE_INLINE && HAVE_7REGS
 255     if (INLINE_SSE(cpu_flags)) {
 256         c->downmix = ac3_downmix_sse;
 257     }
 258 #endif
 259 }