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Macros | Functions
cpu.h File Reference
#include <stddef.h>
#include "attributes.h"

Go to the source code of this file.

Macros

#define AV_CPU_FLAG_FORCE   0x80000000 /* force usage of selected flags (OR) */
 
#define AV_CPU_FLAG_MMX   0x0001
 standard MMX More...
 
#define AV_CPU_FLAG_MMXEXT   0x0002
 SSE integer functions or AMD MMX ext. More...
 
#define AV_CPU_FLAG_MMX2   0x0002
 SSE integer functions or AMD MMX ext. More...
 
#define AV_CPU_FLAG_3DNOW   0x0004
 AMD 3DNOW. More...
 
#define AV_CPU_FLAG_SSE   0x0008
 SSE functions. More...
 
#define AV_CPU_FLAG_SSE2   0x0010
 PIV SSE2 functions. More...
 
#define AV_CPU_FLAG_SSE2SLOW   0x40000000
 SSE2 supported, but usually not faster. More...
 
#define AV_CPU_FLAG_3DNOWEXT   0x0020
 AMD 3DNowExt. More...
 
#define AV_CPU_FLAG_SSE3   0x0040
 Prescott SSE3 functions. More...
 
#define AV_CPU_FLAG_SSE3SLOW   0x20000000
 SSE3 supported, but usually not faster. More...
 
#define AV_CPU_FLAG_SSSE3   0x0080
 Conroe SSSE3 functions. More...
 
#define AV_CPU_FLAG_SSSE3SLOW   0x4000000
 SSSE3 supported, but usually not faster. More...
 
#define AV_CPU_FLAG_ATOM   0x10000000
 Atom processor, some SSSE3 instructions are slower. More...
 
#define AV_CPU_FLAG_SSE4   0x0100
 Penryn SSE4.1 functions. More...
 
#define AV_CPU_FLAG_SSE42   0x0200
 Nehalem SSE4.2 functions. More...
 
#define AV_CPU_FLAG_AESNI   0x80000
 Advanced Encryption Standard functions. More...
 
#define AV_CPU_FLAG_AVX   0x4000
 AVX functions: requires OS support even if YMM registers aren't used. More...
 
#define AV_CPU_FLAG_AVXSLOW   0x8000000
 AVX supported, but slow when using YMM registers (e.g. Bulldozer) More...
 
#define AV_CPU_FLAG_XOP   0x0400
 Bulldozer XOP functions. More...
 
#define AV_CPU_FLAG_FMA4   0x0800
 Bulldozer FMA4 functions. More...
 
#define AV_CPU_FLAG_CMOV   0x1000
 supports cmov instruction More...
 
#define AV_CPU_FLAG_AVX2   0x8000
 AVX2 functions: requires OS support even if YMM registers aren't used. More...
 
#define AV_CPU_FLAG_FMA3   0x10000
 Haswell FMA3 functions. More...
 
#define AV_CPU_FLAG_BMI1   0x20000
 Bit Manipulation Instruction Set 1. More...
 
#define AV_CPU_FLAG_BMI2   0x40000
 Bit Manipulation Instruction Set 2. More...
 
#define AV_CPU_FLAG_AVX512   0x100000
 AVX-512 functions: requires OS support even if YMM/ZMM registers aren't used. More...
 
#define AV_CPU_FLAG_ALTIVEC   0x0001
 standard More...
 
#define AV_CPU_FLAG_VSX   0x0002
 ISA 2.06. More...
 
#define AV_CPU_FLAG_POWER8   0x0004
 ISA 2.07. More...
 
#define AV_CPU_FLAG_ARMV5TE   (1 << 0)
 
#define AV_CPU_FLAG_ARMV6   (1 << 1)
 
#define AV_CPU_FLAG_ARMV6T2   (1 << 2)
 
#define AV_CPU_FLAG_VFP   (1 << 3)
 
#define AV_CPU_FLAG_VFPV3   (1 << 4)
 
#define AV_CPU_FLAG_NEON   (1 << 5)
 
#define AV_CPU_FLAG_ARMV8   (1 << 6)
 
#define AV_CPU_FLAG_VFP_VM   (1 << 7)
 VFPv2 vector mode, deprecated in ARMv7-A and unavailable in various CPUs implementations. More...
 
#define AV_CPU_FLAG_SETEND   (1 <<16)
 

Functions

int av_get_cpu_flags (void)
 Return the flags which specify extensions supported by the CPU. More...
 
void av_force_cpu_flags (int flags)
 Disables cpu detection and forces the specified flags. More...
 
attribute_deprecated void av_set_cpu_flags_mask (int mask)
 Set a mask on flags returned by av_get_cpu_flags(). More...
 
attribute_deprecated int av_parse_cpu_flags (const char *s)
 Parse CPU flags from a string. More...
 
int av_parse_cpu_caps (unsigned *flags, const char *s)
 Parse CPU caps from a string and update the given AV_CPU_* flags based on that. More...
 
int av_cpu_count (void)
 
size_t av_cpu_max_align (void)
 Get the maximum data alignment that may be required by FFmpeg. More...
 

Macro Definition Documentation

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

Definition at line 28 of file cpu.h.

#define AV_CPU_FLAG_MMX   0x0001
#define AV_CPU_FLAG_MMXEXT   0x0002
#define AV_CPU_FLAG_MMX2   0x0002

SSE integer functions or AMD MMX ext.

Definition at line 33 of file cpu.h.

Referenced by av_parse_cpu_caps(), and multiple_resample().

#define AV_CPU_FLAG_3DNOW   0x0004
#define AV_CPU_FLAG_SSE   0x0008

SSE functions.

Definition at line 35 of file cpu.h.

Referenced by av_force_cpu_flags(), av_parse_cpu_caps(), ff_get_cpu_flags_x86(), and ff_get_cpu_max_align_x86().

#define AV_CPU_FLAG_SSE2   0x0010
#define AV_CPU_FLAG_SSE2SLOW   0x40000000

SSE2 supported, but usually not faster.

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

Definition at line 37 of file cpu.h.

Referenced by av_force_cpu_flags(), av_parse_cpu_caps(), ff_audio_convert_init_x86(), ff_get_cpu_flags_x86(), and ff_get_cpu_max_align_x86().

#define AV_CPU_FLAG_3DNOWEXT   0x0020

AMD 3DNowExt.

Definition at line 39 of file cpu.h.

Referenced by av_force_cpu_flags(), av_parse_cpu_caps(), and ff_get_cpu_flags_x86().

#define AV_CPU_FLAG_SSE3   0x0040

Prescott SSE3 functions.

Definition at line 40 of file cpu.h.

Referenced by av_force_cpu_flags(), av_parse_cpu_caps(), ff_get_cpu_flags_x86(), ff_get_cpu_max_align_x86(), and ff_sws_init_swscale_x86().

#define AV_CPU_FLAG_SSE3SLOW   0x20000000

SSE3 supported, but usually not faster.

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

Definition at line 41 of file cpu.h.

Referenced by av_force_cpu_flags(), av_parse_cpu_caps(), ff_get_cpu_flags_x86(), and ff_get_cpu_max_align_x86().

#define AV_CPU_FLAG_SSSE3   0x0080
#define AV_CPU_FLAG_SSSE3SLOW   0x4000000

SSSE3 supported, but usually not faster.

Definition at line 44 of file cpu.h.

Referenced by ff_get_cpu_flags_x86(), and ff_get_cpu_max_align_x86().

#define AV_CPU_FLAG_ATOM   0x10000000

Atom processor, some SSSE3 instructions are slower.

Definition at line 45 of file cpu.h.

Referenced by av_parse_cpu_caps(), av_parse_cpu_flags(), ff_ac3dsp_init_x86(), ff_audiodsp_init_x86(), ff_get_cpu_flags_x86(), ff_get_cpu_max_align_x86(), and ff_volume_init_x86().

#define AV_CPU_FLAG_SSE4   0x0100

Penryn SSE4.1 functions.

Definition at line 46 of file cpu.h.

Referenced by av_force_cpu_flags(), av_parse_cpu_caps(), ff_get_cpu_flags_x86(), and ff_get_cpu_max_align_x86().

#define AV_CPU_FLAG_SSE42   0x0200

Nehalem SSE4.2 functions.

Definition at line 47 of file cpu.h.

Referenced by av_force_cpu_flags(), av_parse_cpu_caps(), ff_get_cpu_flags_x86(), ff_get_cpu_max_align_x86(), and ff_llauddsp_init_x86().

#define AV_CPU_FLAG_AESNI   0x80000

Advanced Encryption Standard functions.

Definition at line 48 of file cpu.h.

Referenced by av_parse_cpu_caps(), ff_get_cpu_flags_x86(), and ff_get_cpu_max_align_x86().

#define AV_CPU_FLAG_AVX   0x4000

AVX functions: requires OS support even if YMM registers aren't used.

Definition at line 49 of file cpu.h.

Referenced by av_force_cpu_flags(), av_parse_cpu_caps(), ff_get_cpu_flags_x86(), ff_get_cpu_max_align_x86(), and ff_v210_x86_init().

#define AV_CPU_FLAG_AVXSLOW   0x8000000

AVX supported, but slow when using YMM registers (e.g. Bulldozer)

Definition at line 50 of file cpu.h.

Referenced by av_force_cpu_flags(), av_parse_cpu_caps(), ff_ac3dsp_set_downmix_x86(), ff_get_cpu_flags_x86(), and ff_get_cpu_max_align_x86().

#define AV_CPU_FLAG_XOP   0x0400

Bulldozer XOP functions.

Definition at line 51 of file cpu.h.

Referenced by av_force_cpu_flags(), av_parse_cpu_caps(), ff_get_cpu_flags_x86(), and ff_get_cpu_max_align_x86().

#define AV_CPU_FLAG_FMA4   0x0800

Bulldozer FMA4 functions.

Definition at line 52 of file cpu.h.

Referenced by av_force_cpu_flags(), av_parse_cpu_caps(), ff_get_cpu_flags_x86(), and ff_get_cpu_max_align_x86().

#define AV_CPU_FLAG_CMOV   0x1000

supports cmov instruction

Definition at line 53 of file cpu.h.

Referenced by av_parse_cpu_caps(), av_parse_cpu_flags(), ff_get_cpu_flags_x86(), ff_h264dsp_init_x86(), ff_llviddsp_init_x86(), and PRED4x4().

#define AV_CPU_FLAG_AVX2   0x8000

AVX2 functions: requires OS support even if YMM registers aren't used.

Definition at line 54 of file cpu.h.

Referenced by av_force_cpu_flags(), av_parse_cpu_caps(), ff_get_cpu_flags_x86(), and ff_get_cpu_max_align_x86().

#define AV_CPU_FLAG_FMA3   0x10000

Haswell FMA3 functions.

Definition at line 55 of file cpu.h.

Referenced by av_force_cpu_flags(), av_parse_cpu_caps(), ff_get_cpu_flags_x86(), and ff_get_cpu_max_align_x86().

#define AV_CPU_FLAG_BMI1   0x20000

Bit Manipulation Instruction Set 1.

Definition at line 56 of file cpu.h.

Referenced by av_parse_cpu_caps(), av_parse_cpu_flags(), and ff_get_cpu_flags_x86().

#define AV_CPU_FLAG_BMI2   0x40000

Bit Manipulation Instruction Set 2.

Definition at line 57 of file cpu.h.

Referenced by av_parse_cpu_caps(), ff_get_cpu_flags_x86(), and ff_mlpdsp_init_x86().

#define AV_CPU_FLAG_AVX512   0x100000

AVX-512 functions: requires OS support even if YMM/ZMM registers aren't used.

Definition at line 58 of file cpu.h.

Referenced by av_force_cpu_flags(), av_parse_cpu_caps(), ff_get_cpu_flags_x86(), and ff_get_cpu_max_align_x86().

#define AV_CPU_FLAG_ALTIVEC   0x0001
#define AV_CPU_FLAG_VSX   0x0002

ISA 2.06.

Definition at line 61 of file cpu.h.

Referenced by ff_get_cpu_flags_ppc(), and ff_get_cpu_max_align_ppc().

#define AV_CPU_FLAG_POWER8   0x0004

ISA 2.07.

Definition at line 62 of file cpu.h.

Referenced by ff_get_cpu_flags_ppc(), and ff_get_cpu_max_align_ppc().

#define AV_CPU_FLAG_ARMV5TE   (1 << 0)

Definition at line 64 of file cpu.h.

Referenced by av_parse_cpu_caps(), av_parse_cpu_flags(), and ff_get_cpu_flags_arm().

#define AV_CPU_FLAG_ARMV6   (1 << 1)

Definition at line 65 of file cpu.h.

Referenced by av_parse_cpu_caps(), av_parse_cpu_flags(), and ff_get_cpu_flags_arm().

#define AV_CPU_FLAG_ARMV6T2   (1 << 2)

Definition at line 66 of file cpu.h.

Referenced by av_parse_cpu_caps(), and av_parse_cpu_flags().

#define AV_CPU_FLAG_VFP   (1 << 3)

Definition at line 67 of file cpu.h.

Referenced by av_parse_cpu_caps(), av_parse_cpu_flags(), and ff_get_cpu_flags_aarch64().

#define AV_CPU_FLAG_VFPV3   (1 << 4)

Definition at line 68 of file cpu.h.

Referenced by av_parse_cpu_caps(), av_parse_cpu_flags(), and ff_get_cpu_flags_arm().

#define AV_CPU_FLAG_NEON   (1 << 5)
#define AV_CPU_FLAG_ARMV8   (1 << 6)

Definition at line 70 of file cpu.h.

Referenced by av_parse_cpu_caps(), av_parse_cpu_flags(), and ff_get_cpu_flags_aarch64().

#define AV_CPU_FLAG_VFP_VM   (1 << 7)

VFPv2 vector mode, deprecated in ARMv7-A and unavailable in various CPUs implementations.

Definition at line 71 of file cpu.h.

Referenced by av_parse_cpu_caps(), and av_parse_cpu_flags().

#define AV_CPU_FLAG_SETEND   (1 <<16)

Definition at line 72 of file cpu.h.

Referenced by av_parse_cpu_caps(), and ff_get_cpu_flags_arm().

Function Documentation

int av_get_cpu_flags ( void  )

Return the flags which specify extensions supported by the CPU.

The returned value is affected by av_force_cpu_flags() if that was used before. So av_get_cpu_flags() can easily be used in an application to detect the enabled cpu flags.

Definition at line 93 of file cpu.c.

Referenced by check_cpu_flag(), D(), define_8tap_2d_funcs(), ff_aac_dsp_init_x86(), ff_ac3dsp_init_arm(), ff_ac3dsp_init_x86(), ff_ac3dsp_set_downmix_x86(), ff_afir_init_x86(), ff_alacdsp_init_x86(), ff_audio_convert_init_aarch64(), ff_audio_convert_init_arm(), ff_audio_convert_init_x86(), ff_audio_mix_init_x86(), ff_audio_resample_init_aarch64(), ff_audio_resample_init_arm(), ff_audiodsp_init_arm(), ff_audiodsp_init_ppc(), ff_audiodsp_init_x86(), ff_blend_init_x86(), ff_blockdsp_init_arm(), ff_blockdsp_init_ppc(), ff_blockdsp_init_x86(), ff_bswapdsp_init_x86(), ff_bwdif_init_x86(), ff_cavsdsp_init_x86(), ff_colorspacedsp_x86_init(), ff_dcadsp_init_x86(), ff_dct_encode_init_x86(), ff_dct_init_x86(), ff_diracdsp_init_x86(), ff_dither_init_x86(), ff_dnxhdenc_init_x86(), ff_dwt_init_x86(), ff_eq_init_x86(), ff_exrdsp_init_x86(), ff_fdctdsp_init_ppc(), ff_fdctdsp_init_x86(), ff_fft_fixed_init_arm(), ff_fft_init_aarch64(), ff_fft_init_arm(), ff_fft_init_ppc(), ff_fft_init_x86(), ff_fixed_dsp_init_x86(), ff_flacdsp_init_x86(), ff_float_dsp_init_aarch64(), ff_float_dsp_init_arm(), ff_float_dsp_init_ppc(), ff_float_dsp_init_x86(), ff_fmt_convert_init_aarch64(), ff_fmt_convert_init_arm(), ff_fmt_convert_init_ppc(), ff_fmt_convert_init_x86(), ff_fspp_init_x86(), ff_g722dsp_init_arm(), ff_g722dsp_init_x86(), ff_get_cpu_max_align_aarch64(), ff_get_cpu_max_align_arm(), ff_get_cpu_max_align_ppc(), ff_get_cpu_max_align_x86(), ff_get_unscaled_swscale_aarch64(), ff_get_unscaled_swscale_arm(), ff_get_unscaled_swscale_ppc(), ff_gradfun_init_x86(), ff_h263dsp_init_x86(), ff_h264_pred_init_aarch64(), ff_h264_pred_init_arm(), ff_h264chroma_init_aarch64(), ff_h264chroma_init_arm(), ff_h264chroma_init_ppc(), ff_h264chroma_init_x86(), ff_h264dsp_init_aarch64(), ff_h264dsp_init_arm(), ff_h264dsp_init_ppc(), ff_h264dsp_init_x86(), ff_h264qpel_init_aarch64(), ff_h264qpel_init_arm(), ff_h264qpel_init_ppc(), ff_h264qpel_init_x86(), ff_hevc_dsp_init_arm(), ff_hevc_dsp_init_ppc(), ff_hevc_dsp_init_x86(), ff_hflip_init_x86(), ff_hpeldsp_init_aarch64(), ff_hpeldsp_init_arm(), ff_hpeldsp_init_ppc(), ff_hpeldsp_init_x86(), ff_huffyuvdsp_init_x86(), ff_huffyuvencdsp_init_x86(), ff_idctdsp_init_arm(), ff_idctdsp_init_ppc(), ff_idctdsp_init_x86(), ff_idet_init_x86(), ff_image_copy_plane_uc_from_x86(), ff_init_lls_x86(), ff_interlace_init_x86(), ff_jpeg2000dsp_init_x86(), ff_limiter_init_x86(), ff_llauddsp_init_arm(), ff_llauddsp_init_ppc(), ff_llauddsp_init_x86(), ff_llviddsp_init_ppc(), ff_llviddsp_init_x86(), ff_llvidencdsp_init_x86(), ff_lpc_init_x86(), ff_maskedmerge_init_x86(), ff_mdct15_init_x86(), ff_me_cmp_init_arm(), ff_me_cmp_init_ppc(), ff_mlpdsp_init_arm(), ff_mlpdsp_init_x86(), ff_mpadsp_init_aarch64(), ff_mpadsp_init_arm(), ff_mpadsp_init_ppc(), ff_mpadsp_init_x86(), ff_mpegvideodsp_init_ppc(), ff_mpegvideodsp_init_x86(), ff_mpegvideoencdsp_init_arm(), ff_mpegvideoencdsp_init_ppc(), ff_mpegvideoencdsp_init_x86(), ff_mpv_common_init_arm(), ff_mpv_common_init_neon(), ff_mpv_common_init_ppc(), ff_mpv_common_init_x86(), ff_noise_init_x86(), ff_opus_dsp_init_x86(), ff_pixblockdsp_init_arm(), ff_pixblockdsp_init_ppc(), ff_pixblockdsp_init_x86(), ff_pixelutils_sad_init_x86(), ff_pngdsp_init_x86(), ff_pp7_init_x86(), ff_proresdsp_init_x86(), ff_psdsp_init_aarch64(), ff_psdsp_init_arm(), ff_psdsp_init_x86(), ff_psnr_init_x86(), ff_pullup_init_x86(), ff_qpeldsp_init_x86(), ff_rdft_init_arm(), ff_removegrain_init_x86(), ff_rv34dsp_init_arm(), ff_rv34dsp_init_x86(), ff_rv40dsp_init_aarch64(), ff_rv40dsp_init_arm(), ff_rv40dsp_init_x86(), ff_sbrdsp_init_aarch64(), ff_sbrdsp_init_arm(), ff_sbrdsp_init_x86(), ff_showcqt_init_x86(), ff_spatial_idwt_init_x86(), ff_spp_init_x86(), ff_ssim_init_x86(), ff_stereo3d_init_x86(), ff_svq1enc_init_ppc(), ff_svq1enc_init_x86(), ff_sws_init_swscale_aarch64(), ff_sws_init_swscale_arm(), ff_sws_init_swscale_ppc(), ff_sws_init_swscale_x86(), ff_synth_filter_init_aarch64(), ff_synth_filter_init_arm(), ff_synth_filter_init_x86(), ff_takdsp_init_x86(), ff_threshold_init_x86(), ff_tinterlace_init_x86(), ff_ttadsp_init_x86(), ff_ttaencdsp_init_x86(), ff_utvideodsp_init_x86(), ff_v210_x86_init(), ff_v210enc_init_x86(), ff_vc1dsp_init_aarch64(), ff_vc1dsp_init_arm(), ff_vc1dsp_init_ppc(), ff_vc1dsp_init_x86(), ff_videodsp_init_aarch64(), ff_videodsp_init_arm(), ff_videodsp_init_x86(), ff_volume_init_x86(), ff_vorbisdsp_init_aarch64(), ff_vorbisdsp_init_arm(), ff_vorbisdsp_init_ppc(), ff_vorbisdsp_init_x86(), ff_vp3dsp_init_arm(), ff_vp3dsp_init_ppc(), ff_vp3dsp_init_x86(), ff_vp6dsp_init_arm(), ff_vp6dsp_init_x86(), ff_vp78dsp_init_arm(), ff_vp78dsp_init_ppc(), ff_vp78dsp_init_x86(), ff_vp8dsp_init_arm(), ff_vp8dsp_init_x86(), ff_vp9dsp_init_16bpp_x86(), ff_vp9dsp_init_x86(), ff_w3fdif_init_x86(), ff_xvid_idct_init_x86(), ff_yadif_init_x86(), ff_yuv2rgb_init_ppc(), ff_yuv2rgb_init_tables_ppc(), ff_yuv2rgb_init_x86(), INIT_FUNC(), lf_mix_fns(), main(), multiple_resample(), opt_cpuflags(), pp_get_context(), PRED4x4(), rgb2rgb_init_x86(), swri_audio_convert_init_aarch64(), swri_audio_convert_init_arm(), swri_audio_convert_init_x86(), swri_resample_dsp_aarch64_init(), swri_resample_dsp_arm_init(), swri_resample_dsp_x86_init(), sws_init_context(), swscale(), thread_main(), vp9dsp_itxfm_init_aarch64(), vp9dsp_itxfm_init_arm(), vp9dsp_loopfilter_init_aarch64(), and vp9dsp_loopfilter_init_arm().

void av_force_cpu_flags ( int  flags)

Disables cpu detection and forces the specified flags.

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

Definition at line 65 of file cpu.c.

Referenced by check_cpu_flag(), main(), and opt_cpuflags().

attribute_deprecated void av_set_cpu_flags_mask ( int  mask)

Set a mask on flags returned by av_get_cpu_flags().

This function is mainly useful for testing. Please use av_force_cpu_flags() and av_get_cpu_flags() instead which are more flexible

Definition at line 103 of file cpu.c.

attribute_deprecated int av_parse_cpu_flags ( const char *  s)

Parse CPU flags from a string.

The returned flags contain the specified flags as well as related unspecified flags.

This function exists only for compatibility with libav. Please use av_parse_cpu_caps() when possible.

Returns
a combination of AV_CPU_* flags, negative on error.

Definition at line 109 of file cpu.c.

int av_parse_cpu_caps ( unsigned *  flags,
const char *  s 
)

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

Returns
negative on error.

Definition at line 191 of file cpu.c.

Referenced by main(), and opt_cpuflags().

int av_cpu_count ( void  )
Returns
the number of logical CPU cores present.

Definition at line 267 of file cpu.c.

Referenced by ff_frame_thread_encoder_init(), ff_frame_thread_init(), ff_slice_thread_init(), and main().

size_t av_cpu_max_align ( void  )

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

Note that this is affected by the build configuration and the CPU flags mask, so e.g. if the CPU supports AVX, but libavutil has been built with –disable-avx or the AV_CPU_FLAG_AVX flag has been disabled through av_set_cpu_flags_mask(), then this function will behave as if AVX is not present.

Definition at line 309 of file cpu.c.