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FFmpeg/libavcodec/x86/ac3dsp_init.c

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  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 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. }