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tuoheng_airport_stream_disc.../ffmpeg/include/libavutil/cpu.h

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  1. /*

  2.  * Copyright (c) 2000, 2001, 2002 Fabrice Bellard

  3.  *

  4.  * This file is part of FFmpeg.

  5.  *

  6.  * FFmpeg is free software; you can redistribute it and/or

  7.  * modify it under the terms of the GNU Lesser General Public

  8.  * License as published by the Free Software Foundation; either

  9.  * version 2.1 of the License, or (at your option) any later version.

  10.  *

  11.  * FFmpeg is distributed in the hope that it will be useful,

  12.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  13.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  14.  * Lesser General Public License for more details.

  15.  *

  16.  * You should have received a copy of the GNU Lesser General Public

  17.  * License along with FFmpeg; if not, write to the Free Software

  18.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  19.  */

  20. 

  21. #ifndef AVUTIL_CPU_H

  22. #define AVUTIL_CPU_H

  23. 

  24. #include <stddef.h>

  25. 

  26. #define AV_CPU_FLAG_FORCE    0x80000000 /* force usage of selected flags (OR) */

  27. 

  28.     /* lower 16 bits - CPU features */

  29. #define AV_CPU_FLAG_MMX          0x0001 ///< standard MMX

  30. #define AV_CPU_FLAG_MMXEXT       0x0002 ///< SSE integer functions or AMD MMX ext

  31. #define AV_CPU_FLAG_MMX2         0x0002 ///< SSE integer functions or AMD MMX ext

  32. #define AV_CPU_FLAG_3DNOW        0x0004 ///< AMD 3DNOW

  33. #define AV_CPU_FLAG_SSE          0x0008 ///< SSE functions

  34. #define AV_CPU_FLAG_SSE2         0x0010 ///< PIV SSE2 functions

  35. #define AV_CPU_FLAG_SSE2SLOW 0x40000000 ///< SSE2 supported, but usually not faster

  36.                                         ///< than regular MMX/SSE (e.g. Core1)

  37. #define AV_CPU_FLAG_3DNOWEXT     0x0020 ///< AMD 3DNowExt

  38. #define AV_CPU_FLAG_SSE3         0x0040 ///< Prescott SSE3 functions

  39. #define AV_CPU_FLAG_SSE3SLOW 0x20000000 ///< SSE3 supported, but usually not faster

  40.                                         ///< than regular MMX/SSE (e.g. Core1)

  41. #define AV_CPU_FLAG_SSSE3        0x0080 ///< Conroe SSSE3 functions

  42. #define AV_CPU_FLAG_SSSE3SLOW 0x4000000 ///< SSSE3 supported, but usually not faster

  43. #define AV_CPU_FLAG_ATOM     0x10000000 ///< Atom processor, some SSSE3 instructions are slower

  44. #define AV_CPU_FLAG_SSE4         0x0100 ///< Penryn SSE4.1 functions

  45. #define AV_CPU_FLAG_SSE42        0x0200 ///< Nehalem SSE4.2 functions

  46. #define AV_CPU_FLAG_AESNI       0x80000 ///< Advanced Encryption Standard functions

  47. #define AV_CPU_FLAG_AVX          0x4000 ///< AVX functions: requires OS support even if YMM registers aren't used

  48. #define AV_CPU_FLAG_AVXSLOW   0x8000000 ///< AVX supported, but slow when using YMM registers (e.g. Bulldozer)

  49. #define AV_CPU_FLAG_XOP          0x0400 ///< Bulldozer XOP functions

  50. #define AV_CPU_FLAG_FMA4         0x0800 ///< Bulldozer FMA4 functions

  51. #define AV_CPU_FLAG_CMOV         0x1000 ///< supports cmov instruction

  52. #define AV_CPU_FLAG_AVX2         0x8000 ///< AVX2 functions: requires OS support even if YMM registers aren't used

  53. #define AV_CPU_FLAG_FMA3        0x10000 ///< Haswell FMA3 functions

  54. #define AV_CPU_FLAG_BMI1        0x20000 ///< Bit Manipulation Instruction Set 1

  55. #define AV_CPU_FLAG_BMI2        0x40000 ///< Bit Manipulation Instruction Set 2

  56. #define AV_CPU_FLAG_AVX512     0x100000 ///< AVX-512 functions: requires OS support even if YMM/ZMM registers aren't used

  57. #define AV_CPU_FLAG_AVX512ICL  0x200000 ///< F/CD/BW/DQ/VL/VNNI/IFMA/VBMI/VBMI2/VPOPCNTDQ/BITALG/GFNI/VAES/VPCLMULQDQ

  58. #define AV_CPU_FLAG_SLOW_GATHER  0x2000000 ///< CPU has slow gathers.

  59. 

  60. #define AV_CPU_FLAG_ALTIVEC      0x0001 ///< standard

  61. #define AV_CPU_FLAG_VSX          0x0002 ///< ISA 2.06

  62. #define AV_CPU_FLAG_POWER8       0x0004 ///< ISA 2.07

  63. 

  64. #define AV_CPU_FLAG_ARMV5TE      (1 << 0)

  65. #define AV_CPU_FLAG_ARMV6        (1 << 1)

  66. #define AV_CPU_FLAG_ARMV6T2      (1 << 2)

  67. #define AV_CPU_FLAG_VFP          (1 << 3)

  68. #define AV_CPU_FLAG_VFPV3        (1 << 4)

  69. #define AV_CPU_FLAG_NEON         (1 << 5)

  70. #define AV_CPU_FLAG_ARMV8        (1 << 6)

  71. #define AV_CPU_FLAG_VFP_VM       (1 << 7) ///< VFPv2 vector mode, deprecated in ARMv7-A and unavailable in various CPUs implementations

  72. #define AV_CPU_FLAG_SETEND       (1 <<16)

  73. 

  74. #define AV_CPU_FLAG_MMI          (1 << 0)

  75. #define AV_CPU_FLAG_MSA          (1 << 1)

  76. 

  77. //Loongarch SIMD extension.

  78. #define AV_CPU_FLAG_LSX          (1 << 0)

  79. #define AV_CPU_FLAG_LASX         (1 << 1)

  80. 

  81. // RISC-V extensions

  82. #define AV_CPU_FLAG_RVI          (1 << 0) ///< I (full GPR bank)

  83. #define AV_CPU_FLAG_RVF          (1 << 1) ///< F (single precision FP)

  84. #define AV_CPU_FLAG_RVD          (1 << 2) ///< D (double precision FP)

  85. #define AV_CPU_FLAG_RVV_I32      (1 << 3) ///< Vectors of 8/16/32-bit int's */

  86. #define AV_CPU_FLAG_RVV_F32      (1 << 4) ///< Vectors of float's */

  87. #define AV_CPU_FLAG_RVV_I64      (1 << 5) ///< Vectors of 64-bit int's */

  88. #define AV_CPU_FLAG_RVV_F64      (1 << 6) ///< Vectors of double's

  89. #define AV_CPU_FLAG_RVB_BASIC    (1 << 7) ///< Basic bit-manipulations

  90. 

  91. /**

  92.  * Return the flags which specify extensions supported by the CPU.

  93.  * The returned value is affected by av_force_cpu_flags() if that was used

  94.  * before. So av_get_cpu_flags() can easily be used in an application to

  95.  * detect the enabled cpu flags.

  96.  */

  97. int av_get_cpu_flags(void);

  98. 

  99. /**

  100.  * Disables cpu detection and forces the specified flags.

  101.  * -1 is a special case that disables forcing of specific flags.

  102.  */

  103. void av_force_cpu_flags(int flags);

  104. 

  105. /**

  106.  * Parse CPU caps from a string and update the given AV_CPU_* flags based on that.

  107.  *

  108.  * @return negative on error.

  109.  */

  110. int av_parse_cpu_caps(unsigned *flags, const char *s);

  111. 

  112. /**

  113.  * @return the number of logical CPU cores present.

  114.  */

  115. int av_cpu_count(void);

  116. 

  117. /**

  118.  * Overrides cpu count detection and forces the specified count.

  119.  * Count < 1 disables forcing of specific count.

  120.  */

  121. void av_cpu_force_count(int count);

  122. 

  123. /**

  124.  * Get the maximum data alignment that may be required by FFmpeg.

  125.  *

  126.  * Note that this is affected by the build configuration and the CPU flags mask,

  127.  * so e.g. if the CPU supports AVX, but libavutil has been built with

  128.  * --disable-avx or the AV_CPU_FLAG_AVX flag has been disabled through

  129.  *  av_set_cpu_flags_mask(), then this function will behave as if AVX is not

  130.  *  present.

  131.  */

  132. size_t av_cpu_max_align(void);

  133. 

  134. #endif /* AVUTIL_CPU_H */