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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 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. }