libavcodec/mathops.h File Reference

#include "libavutil/common.h"
#include "config.h"

Go to the source code of this file.

Defines
#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	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)
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)

---

Define Documentation

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

Value:

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

Definition at line 133 of file mathops.h.

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

Definition at line 74 of file mathops.h.

Referenced by ff_g722_apply_qmf().

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

Definition at line 65 of file mathops.h.

Referenced by ac3_sum_square_butterfly_int32_c().

#define mid_pred   mid_pred

Definition at line 88 of file mathops.h.

Referenced by add_hfyu_median_prediction_c(), add_lag_median_prediction(), correlate_slice_buffered(), direct_search(), ff_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(), 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(), sub_hfyu_median_prediction_mmx2(), svq1_decode_motion_vector(), vc1_mc_4mv_luma(), vc1_pred_b_mv(), vc1_pred_mv(), vc1_pred_mv_intfr(), and wmv2_pred_motion().

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

Definition at line 83 of file mathops.h.

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

Definition at line 69 of file mathops.h.

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

Definition at line 79 of file mathops.h.

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

Definition at line 45 of file mathops.h.

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

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

Definition at line 49 of file mathops.h.

Referenced by long_term_filter(), and lsp2poly().

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

Definition at line 142 of file mathops.h.

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

Definition at line 146 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_2S16	(	a,
		b		)	PACK_2U16((a)&0xffff, (b)&0xffff)

Definition at line 178 of file mathops.h.

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

Definition at line 172 of file mathops.h.

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

Definition at line 167 of file mathops.h.

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

Definition at line 161 of file mathops.h.

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

Definition at line 175 of file mathops.h.

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

Definition at line 164 of file mathops.h.

Referenced by pred4x4_vertical_vp8_c().

---

Function Documentation

static av_const int mid_pred	(	int	a,
		int	b,
		int	c
	)			[inline, static]

Definition at line 89 of file mathops.h.

static av_always_inline int MULH	(	int	a,
		int	b
	)			[static]

Definition at line 53 of file mathops.h.

static av_const int sign_extend	(	int	val,
		unsigned	bits
	)			[inline, static]

Definition at line 117 of file mathops.h.

Referenced by adpcm_decode_frame(), alac_linear_predictor(), cinaudio_decode_frame(), ff_h263_decode_motion(), ff_h263_encode_motion(), flic_decode_frame_15_16BPP(), flic_decode_frame_8BPP(), get_sbits_long(), mpeg1_encode_motion(), mpeg_decode_motion(), predictor_decompress_fir_adapt(), smka_decode_frame(), svq1_decode_motion_vector(), and xan_wc3_decode_frame().

static av_always_inline unsigned UMULH	(	unsigned	a,
		unsigned	b
	)			[static]

Definition at line 59 of file mathops.h.

Referenced by pRNG().

static av_const unsigned zero_extend	(	unsigned	val,
		unsigned	bits
	)			[inline, static]

Definition at line 126 of file mathops.h.