mathops.h File Reference

#include <stdint.h>
#include "libavutil/common.h"
#include "config.h"

Go to the source code of this file.

Macros
#define	MUL64(a, b)   ((int64_t)(a) * (int64_t)(b))
#define	MULL(a, b, s)   (MUL64(a, b) >> (s))
#define	MAC64(d, a, b)   ((d) += MUL64(a, b))
#define	MLS64(d, a, b)   ((d) -= MUL64(a, b))
#define	MAC16(rt, ra, rb)   rt += (ra) * (rb)
#define	MUL16(ra, rb)   ((ra) * (rb))
#define	MLS16(rt, ra, rb)   ((rt) -= (ra) * (rb))
#define	mid_pred   mid_pred
#define	COPY3_IF_LT(x, y, a, b, c, d)
#define	MASK_ABS(mask, level)
#define	NEG_SSR32(a, s)   ((( int32_t)(a))>>(32-(s)))
#define	NEG_USR32(a, s)   (((uint32_t)(a))>>(32-(s)))
#define	PACK_2U8(a, b)   (((b) << 8) | (a))
#define	PACK_4U8(a, b, c, d)   (((d) << 24) | ((c) << 16) | ((b) << 8) | (a))
#define	PACK_2U16(a, b)   (((b) << 16) | (a))
#define	PACK_2S8(a, b)   PACK_2U8((a)&255, (b)&255)
#define	PACK_4S8(a, b, c, d)   PACK_4U8((a)&255, (b)&255, (c)&255, (d)&255)
#define	PACK_2S16(a, b)   PACK_2U16((a)&0xffff, (b)&0xffff)
#define	FASTDIV(a, b)   ((uint32_t)((((uint64_t)a) * ff_inverse[b]) >> 32))
#define	MOD_UNLIKELY(modulus, dividend, divisor, prev_dividend)

Functions
static av_always_inline int	MULH (int a, int b)
static av_always_inline unsigned	UMULH (unsigned a, unsigned b)
static av_const int	mid_pred (int a, int b, int c)
static av_const int	sign_extend (int val, unsigned bits)
static av_const unsigned	zero_extend (unsigned val, unsigned bits)
static av_const unsigned int	ff_sqrt (unsigned int a)
static int8_t	ff_u8_to_s8 (uint8_t a)

Variables
const uint32_t	ff_inverse [257]
const uint8_t	ff_reverse [256]
const uint8_t	ff_sqrt_tab [256]

Macro Definition Documentation

#define MUL64	(		a,
			b
	)		((int64_t)(a) * (int64_t)(b))

Definition at line 51 of file mathops.h.

Referenced by decode_var_block_data(), l1_unscale(), MULH(), parcor_to_lpc(), and revert_channel_correlation().

#define MULL	(		a,
			b,
			s
	)		(MUL64(a, b) >> (s))

Definition at line 55 of file mathops.h.

Referenced by long_term_filter(), and lsp2poly().

#define MAC64	(		d,
			a,
			b
	)		((d) += MUL64(a, b))

Definition at line 71 of file mathops.h.

Referenced by ac3_sum_square_butterfly_int32_c().

#define MLS64	(		d,
			a,
			b
	)		((d) -= MUL64(a, b))

Definition at line 75 of file mathops.h.

#define MAC16	(		rt,
			ra,
			rb
	)		rt += (ra) * (rb)

Definition at line 80 of file mathops.h.

Referenced by ff_g722_apply_qmf().

#define MUL16	(		ra,
			rb
	)		((ra) * (rb))

Definition at line 85 of file mathops.h.

#define MLS16	(		rt,
			ra,
			rb
	)		((rt) -= (ra) * (rb))

Definition at line 89 of file mathops.h.

#define mid_pred   mid_pred

Definition at line 94 of file mathops.h.

Referenced by add_hfyu_median_prediction_c(), add_lag_median_prediction(), correlate(), correlate_slice_buffered(), decorrelate(), direct_search(), encode_q_branch(), estimate_motion_b(), ff_estimate_p_frame_motion(), ff_h263_pred_motion(), ff_pre_estimate_p_frame_motion(), get_chroma_mv(), h263_mv4_search(), interlaced_search(), lag_pred_line_yuy2(), loco_predict(), ls_decode_line(), ls_encode_line(), motion_search(), mv_pred_median(), pred_motion(), pred_mv(), pred_pskip_motion(), pred_spatial_direct_motion(), predict(), restore_median(), restore_median_il(), rv34_pred_b_vector(), rv34_pred_mv(), rv34_pred_mv_rv3(), sub_hfyu_median_prediction_c(), svq1_decode_motion_vector(), vc1_mc_4mv_luma(), vc1_pred_b_mv(), vc1_pred_mv(), vc1_pred_mv_intfr(), and wmv2_pred_motion().

#define COPY3_IF_LT	(		x,
			y,
			a,
			b,
			c,
			d
	)

Value:

if ((y) < (x)) {\
    (x) = (y);\
    (a) = (b);\
    (c) = (d);\
}

Definition at line 139 of file mathops.h.

#define MASK_ABS	(		mask,
			level
	)

Value:

do {              \
        mask  = level >> 31;                    \
        level = (level ^ mask) - mask;          \
    } while (0)

Definition at line 148 of file mathops.h.

Referenced by dnxhd_init_vlc(), and mpeg1_encode_block().

#define NEG_SSR32	(		a,
			s
	)		((( int32_t)(a))>>(32-(s)))

Definition at line 155 of file mathops.h.

#define NEG_USR32	(		a,
			s
	)		(((uint32_t)(a))>>(32-(s)))

Definition at line 159 of file mathops.h.

Referenced by decode_block(), decode_block_progressive(), decode_vlc_codeword(), dnxhd_decode_dct_block(), dv_decode_ac(), and get_xbits().

#define PACK_2U8	(		a,
			b
	)		(((b) << 8) | (a))

Definition at line 174 of file mathops.h.

#define PACK_4U8	(		a,
			b,
			c,
			d
	)		(((d) << 24) | ((c) << 16) | ((b) << 8) | (a))

Definition at line 177 of file mathops.h.

Referenced by pred4x4_vertical_vp8_c().

#define PACK_2U16	(		a,
			b
	)		(((b) << 16) | (a))

Definition at line 180 of file mathops.h.

#define PACK_2S8	(		a,
			b
	)		PACK_2U8((a)&255, (b)&255)

Definition at line 185 of file mathops.h.

#define PACK_4S8	(		a,
			b,
			c,
			d
	)		PACK_4U8((a)&255, (b)&255, (c)&255, (d)&255)

Definition at line 188 of file mathops.h.

#define PACK_2S16	(		a,
			b
	)		PACK_2U16((a)&0xffff, (b)&0xffff)

Definition at line 191 of file mathops.h.

#define FASTDIV	(		a,
			b
	)		((uint32_t)((((uint64_t)a) * ff_inverse[b]) >> 32))

Definition at line 195 of file mathops.h.

Referenced by adapt_prob(), decode_blockcode(), ff_mpeg4_pred_dc(), ff_msmpeg4_pred_dc(), ff_sqrt(), get_dc(), lag_get_rac(), mpeg4_decode_block(), unpack_bitstream(), and vorbis_residue_decode_internal().

#define MOD_UNLIKELY	(		modulus,
			dividend,
			divisor,
			prev_dividend
	)

Value:

do { \
        if ((prev_dividend) == 0 || (dividend) - (prev_dividend) != (divisor)) \
            (modulus) = (dividend) % (divisor); \
        (prev_dividend) = (dividend); \
    } while (0)

Definition at line 199 of file mathops.h.

Function Documentation

static av_always_inline int MULH ( int  a, int  b  )

static

Definition at line 59 of file mathops.h.

static av_always_inline unsigned UMULH ( unsigned  a, unsigned  b  )

static

Definition at line 65 of file mathops.h.

Referenced by pRNG().

static av_const int mid_pred ( int  a, int  b, int  c  )

inlinestatic

Definition at line 95 of file mathops.h.

static av_const int sign_extend ( int  val, unsigned  bits  )

inlinestatic

Definition at line 123 of file mathops.h.

Referenced by adpcm_decode_frame(), alac_linear_predictor(), cinaudio_decode_frame(), dpcm_decode_frame(), ebml_read_sint(), ff_h263_decode_motion(), ff_h263_encode_motion(), flic_decode_frame_15_16BPP(), flic_decode_frame_8BPP(), get_sbits_long(), libopus_decode_init(), lpc_prediction(), matroska_parse_block(), mpeg1_encode_motion(), mpeg_decode_motion(), smka_decode_frame(), svq1_decode_motion_vector(), tscc2_decode_mb(), tta_decode_frame(), xa_decode(), and xan_wc3_decode_frame().

static av_const unsigned zero_extend ( unsigned  val, unsigned  bits  )

inlinestatic

Definition at line 132 of file mathops.h.

static av_const unsigned int ff_sqrt ( unsigned int  a )

inlinestatic

Definition at line 207 of file mathops.h.

Referenced by calc_cpl_coord(), dpcm_predict(), draw_arrow(), encode_q_branch(), ff_estimate_p_frame_motion(), ff_t_sqrt(), get_visual_weight(), and square_root().

static int8_t ff_u8_to_s8 ( uint8_t  a )

inlinestatic

Definition at line 227 of file mathops.h.

Referenced by color_transform_delta().

Variable Documentation

const uint32_t ff_inverse[257]

Definition at line 25 of file mathtables.c.

Referenced by dct_quantize_TMPL(), ff_msmpeg4_pred_dc(), and setup_classifs().

const uint8_t ff_reverse[256]

Definition at line 72 of file mathtables.c.

Referenced by asv2_get_bits(), asv2_put_bits(), bitswap_32(), decode_frame(), deinvert_buffer(), encode_frame(), fft(), inv_bits(), ir2_decode_frame(), pcm_decode_frame(), pcm_encode_frame(), s302m_decode_frame(), s302m_encode2_frame(), tiff_unpack_fax(), tiff_unpack_strip(), webp_get_vlc(), wnv1_get_code(), xbm_decode_frame(), and xbm_encode_frame().

const uint8_t ff_sqrt_tab[256]

Definition at line 61 of file mathtables.c.

Referenced by ff_sqrt().