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FFmpeg/libavcodec/x86/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 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/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 HAVE_SSE_INLINE && HAVE_7REGS

  67. 

  68. #define IF1(x) x

  69. #define IF0(x)

  70. 

  71. #define MIX5(mono, stereo)                                      \

  72.     __asm__ volatile (                                          \

  73.         "movss           0(%1), %%xmm5          \n"             \

  74.         "movss           8(%1), %%xmm6          \n"             \

  75.         "movss          24(%1), %%xmm7          \n"             \

  76.         "shufps     $0, %%xmm5, %%xmm5          \n"             \

  77.         "shufps     $0, %%xmm6, %%xmm6          \n"             \

  78.         "shufps     $0, %%xmm7, %%xmm7          \n"             \

  79.         "1:                                     \n"             \

  80.         "movaps       (%0, %2), %%xmm0          \n"             \

  81.         "movaps       (%0, %3), %%xmm1          \n"             \

  82.         "movaps       (%0, %4), %%xmm2          \n"             \

  83.         "movaps       (%0, %5), %%xmm3          \n"             \

  84.         "movaps       (%0, %6), %%xmm4          \n"             \

  85.         "mulps          %%xmm5, %%xmm0          \n"             \

  86.         "mulps          %%xmm6, %%xmm1          \n"             \

  87.         "mulps          %%xmm5, %%xmm2          \n"             \

  88.         "mulps          %%xmm7, %%xmm3          \n"             \

  89.         "mulps          %%xmm7, %%xmm4          \n"             \

  90.  stereo("addps          %%xmm1, %%xmm0          \n")            \

  91.         "addps          %%xmm1, %%xmm2          \n"             \

  92.         "addps          %%xmm3, %%xmm0          \n"             \

  93.         "addps          %%xmm4, %%xmm2          \n"             \

  94.    mono("addps          %%xmm2, %%xmm0          \n")            \

  95.         "movaps         %%xmm0, (%0, %2)        \n"             \

  96.  stereo("movaps         %%xmm2, (%0, %3)        \n")            \

  97.         "add               $16, %0              \n"             \

  98.         "jl                 1b                  \n"             \

  99.         : "+&r"(i)                                              \

  100.         : "r"(matrix),                                          \

  101.           "r"(samples[0] + len),                                \

  102.           "r"(samples[1] + len),                                \

  103.           "r"(samples[2] + len),                                \

  104.           "r"(samples[3] + len),                                \

  105.           "r"(samples[4] + len)                                 \

  106.         : XMM_CLOBBERS("%xmm0", "%xmm1", "%xmm2", "%xmm3",      \

  107.                       "%xmm4", "%xmm5", "%xmm6", "%xmm7",)      \

  108.          "memory"                                               \

  109.     );

  110. 

  111. #define MIX_MISC(stereo)                                        \

  112.     __asm__ volatile (                                          \

  113.         "mov              %5, %2            \n"                 \

  114.         "1:                                 \n"                 \

  115.         "mov -%c7(%6, %2, %c8), %3          \n"                 \

  116.         "movaps     (%3, %0), %%xmm0        \n"                 \

  117.  stereo("movaps       %%xmm0, %%xmm1        \n")                \

  118.         "mulps        %%xmm4, %%xmm0        \n"                 \

  119.  stereo("mulps        %%xmm5, %%xmm1        \n")                \

  120.         "2:                                 \n"                 \

  121.         "mov   (%6, %2, %c8), %1            \n"                 \

  122.         "movaps     (%1, %0), %%xmm2        \n"                 \

  123.  stereo("movaps       %%xmm2, %%xmm3        \n")                \

  124.         "mulps   (%4, %2, 8), %%xmm2        \n"                 \

  125.  stereo("mulps 16(%4, %2, 8), %%xmm3        \n")                \

  126.         "addps        %%xmm2, %%xmm0        \n"                 \

  127.  stereo("addps        %%xmm3, %%xmm1        \n")                \

  128.         "add              $4, %2            \n"                 \

  129.         "jl               2b                \n"                 \

  130.         "mov              %5, %2            \n"                 \

  131.  stereo("mov   (%6, %2, %c8), %1            \n")                \

  132.         "movaps       %%xmm0, (%3, %0)      \n"                 \

  133.  stereo("movaps       %%xmm1, (%1, %0)      \n")                \

  134.         "add             $16, %0            \n"                 \

  135.         "jl               1b                \n"                 \

  136.         : "+&r"(i), "=&r"(j), "=&r"(k), "=&r"(m)                \

  137.         : "r"(matrix_simd + in_ch),                             \

  138.           "g"((intptr_t) - 4 * (in_ch - 1)),                    \

  139.           "r"(samp + in_ch),                                    \

  140.           "i"(sizeof(float *)), "i"(sizeof(float *)/4)          \

  141.         : "memory"                                              \

  142.     );

  143. 

  144. static void ac3_downmix_sse(float **samples, float (*matrix)[2],

  145.                             int out_ch, int in_ch, int len)

  146. {

  147.     int (*matrix_cmp)[2] = (int(*)[2])matrix;

  148.     intptr_t i, j, k, m;

  149. 

  150.     i = -len * sizeof(float);

  151.     if (in_ch == 5 && out_ch == 2 &&

  152.         !(matrix_cmp[0][1] | matrix_cmp[2][0]   |

  153.           matrix_cmp[3][1] | matrix_cmp[4][0]   |

  154.           (matrix_cmp[1][0] ^ matrix_cmp[1][1]) |

  155.           (matrix_cmp[0][0] ^ matrix_cmp[2][1]))) {

  156.         MIX5(IF0, IF1);

  157.     } else if (in_ch == 5 && out_ch == 1 &&

  158.                matrix_cmp[0][0] == matrix_cmp[2][0] &&

  159.                matrix_cmp[3][0] == matrix_cmp[4][0]) {

  160.         MIX5(IF1, IF0);

  161.     } else {

  162.         DECLARE_ALIGNED(16, float, matrix_simd)[AC3_MAX_CHANNELS][2][4];

  163.         float *samp[AC3_MAX_CHANNELS];

  164. 

  165.         for (j = 0; j < in_ch; j++)

  166.             samp[j] = samples[j] + len;

  167. 

  168.         j = 2 * in_ch * sizeof(float);

  169.         __asm__ volatile (

  170.             "1:                                 \n"

  171.             "sub             $8, %0             \n"

  172.             "movss     (%2, %0), %%xmm4         \n"

  173.             "movss    4(%2, %0), %%xmm5         \n"

  174.             "shufps          $0, %%xmm4, %%xmm4 \n"

  175.             "shufps          $0, %%xmm5, %%xmm5 \n"

  176.             "movaps      %%xmm4,   (%1, %0, 4)  \n"

  177.             "movaps      %%xmm5, 16(%1, %0, 4)  \n"

  178.             "jg              1b                 \n"

  179.             : "+&r"(j)

  180.             : "r"(matrix_simd), "r"(matrix)

  181.             : "memory"

  182.         );

  183.         if (out_ch == 2) {

  184.             MIX_MISC(IF1);

  185.         } else {

  186.             MIX_MISC(IF0);

  187.         }

  188.     }

  189. }

  190. 

  191. #endif /* HAVE_SSE_INLINE && HAVE_7REGS */

  192. 

  193. av_cold void ff_ac3dsp_init_x86(AC3DSPContext *c, int bit_exact)

  194. {

  195.     int cpu_flags = av_get_cpu_flags();

  196. 

  197.     if (EXTERNAL_MMX(cpu_flags)) {

  198.         c->ac3_exponent_min = ff_ac3_exponent_min_mmx;

  199.         c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_mmx;

  200.         c->ac3_lshift_int16 = ff_ac3_lshift_int16_mmx;

  201.         c->ac3_rshift_int32 = ff_ac3_rshift_int32_mmx;

  202.     }

  203.     if (EXTERNAL_AMD3DNOW(cpu_flags)) {

  204.         if (!bit_exact) {

  205.             c->float_to_fixed24 = ff_float_to_fixed24_3dnow;

  206.         }

  207.     }

  208.     if (EXTERNAL_MMXEXT(cpu_flags)) {

  209.         c->ac3_exponent_min = ff_ac3_exponent_min_mmxext;

  210.         c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_mmxext;

  211.         if (bit_exact) {

  212.             c->apply_window_int16 = ff_apply_window_int16_mmxext;

  213.         } else {

  214.             c->apply_window_int16 = ff_apply_window_int16_round_mmxext;

  215.         }

  216.     }

  217.     if (EXTERNAL_SSE(cpu_flags)) {

  218.         c->float_to_fixed24 = ff_float_to_fixed24_sse;

  219.     }

  220.     if (EXTERNAL_SSE2(cpu_flags)) {

  221.         c->ac3_exponent_min = ff_ac3_exponent_min_sse2;

  222.         c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_sse2;

  223.         c->float_to_fixed24 = ff_float_to_fixed24_sse2;

  224.         c->compute_mantissa_size = ff_ac3_compute_mantissa_size_sse2;

  225.         c->extract_exponents = ff_ac3_extract_exponents_sse2;

  226.         if (!(cpu_flags & AV_CPU_FLAG_SSE2SLOW)) {

  227.             c->ac3_lshift_int16 = ff_ac3_lshift_int16_sse2;

  228.             c->ac3_rshift_int32 = ff_ac3_rshift_int32_sse2;

  229.         }

  230.         if (bit_exact) {

  231.             c->apply_window_int16 = ff_apply_window_int16_sse2;

  232.         } else if (!(cpu_flags & AV_CPU_FLAG_SSE2SLOW)) {

  233.             c->apply_window_int16 = ff_apply_window_int16_round_sse2;

  234.         }

  235.     }

  236.     if (EXTERNAL_SSSE3(cpu_flags)) {

  237.         c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_ssse3;

  238.         if (cpu_flags & AV_CPU_FLAG_ATOM) {

  239.             c->apply_window_int16 = ff_apply_window_int16_ssse3_atom;

  240.         } else {

  241.             c->extract_exponents = ff_ac3_extract_exponents_ssse3;

  242.             c->apply_window_int16 = ff_apply_window_int16_ssse3;

  243.         }

  244.     }

  245. 

  246. #if HAVE_SSE_INLINE && HAVE_7REGS

  247.     if (INLINE_SSE(cpu_flags)) {

  248.         c->downmix = ac3_downmix_sse;

  249.     }

  250. #endif

  251. }