AVRational64

64-bit extension of AVRational More...

Data Structures
struct	AVRational64
	64-bit Rational number (pair of numerator and denominator). More...

Functions
static AVRational64	av_make_q64 (int64_t num, int64_t den)
	Create an AVRational64. More...
int	av_cmp_q64 (AVRational64 a, AVRational64 b)
	Compare two 64-bit rationals. More...
static double	av_q2d_64 (AVRational64 a)
	Convert an AVRational64 to a double. More...
AVRational64	av_mul_q64 (AVRational64 b, AVRational64 c) av_const
	Multiply two 64-bit rationals. More...
AVRational64	av_div_q64 (AVRational64 b, AVRational64 c) av_const
	Divide one 64-bit rational by another. More...
AVRational64	av_add_q64 (AVRational64 b, AVRational64 c) av_const
	Add two 64-bit rationals. More...
AVRational64	av_sub_q64 (AVRational64 b, AVRational64 c) av_const
	Subtract one 64-bit rational from another. More...
static av_always_inline AVRational64	av_inv_q64 (AVRational64 q)
	Invert a 64-bit rational. More...
AVRational64	av_gcd_q64 (AVRational64 a, AVRational64 b, int max_den, AVRational64 def)
	Return the best rational so that a and b are multiple of it. More...

Detailed Description

64-bit extension of AVRational

Offers a 64-bit extended version of AVRational. This is less efficient (and may revolve around emulated 128-bit multiplications internally), but allows to represent a much larger range of rational numbers without overflow.

Function Documentation

av_make_q64()

static AVRational64 av_make_q64 ( int64_t  num, int64_t  den  )

inlinestatic

Create an AVRational64.

Useful for compilers that do not support compound literals.

Note

The return value is not reduced.

Definition at line 64 of file rational64.h.

Referenced by ff_sws_apply_op_q().

av_cmp_q64()

int av_cmp_q64	(	AVRational64	a,
		AVRational64	b
	)

Compare two 64-bit rationals.

Parameters

a	First rational
b	Second rational

Returns

One of the following values:

• 0 if a == b
• 1 if a > b
• -1 if a < b
• INT_MIN if one of the values is of the form 0 / 0

Definition at line 108 of file rational64.c.

Referenced by av_max_q64(), av_min_q64(), extract_scalar(), ff_sws_linear_mask(), ff_sws_op_list_optimize(), ff_sws_op_list_update_comps(), main(), and op_commute_swizzle().

av_q2d_64()

static double av_q2d_64 ( AVRational64  a )

inlinestatic

Convert an AVRational64 to a double.

Parameters

a	AVRational64 to convert

Returns

a in floating-point form

See also

av_d2q()

Definition at line 90 of file rational64.h.

Referenced by main(), and print_q().

av_mul_q64()

AVRational64 av_mul_q64	(	AVRational64	b,
		AVRational64	c
	)		const

Multiply two 64-bit rationals.

Parameters

b	First multiplicant
c	Second multiplicant

Returns

b*c

Definition at line 124 of file rational64.c.

Referenced by apply_filter_weights(), av_div_q64(), ff_sws_apply_op_q(), ff_sws_op_list_optimize(), ff_sws_op_list_update_comps(), and main().

av_div_q64()

AVRational64 av_div_q64	(	AVRational64	b,
		AVRational64	c
	)		const

Divide one 64-bit rational by another.

Parameters

b	Dividend
c	Divisor

Returns

b/c

Definition at line 130 of file rational64.c.

Referenced by main().

av_add_q64()

AVRational64 av_add_q64	(	AVRational64	b,
		AVRational64	c
	)		const

Add two 64-bit rationals.

Parameters

b	First addend
c	Second addend

Returns

b+c

Definition at line 135 of file rational64.c.

Referenced by apply_filter_weights(), ff_sws_apply_op_q(), ff_sws_op_list_optimize(), ff_sws_op_list_update_comps(), and main().

av_sub_q64()

AVRational64 av_sub_q64	(	AVRational64	b,
		AVRational64	c
	)		const

Subtract one 64-bit rational from another.

Parameters

b	Minuend
c	Subtrahend

Returns

b-c

Definition at line 141 of file rational64.c.

Referenced by main().

av_inv_q64()

static av_always_inline AVRational64 av_inv_q64 ( AVRational64  q )

static

Invert a 64-bit rational.

Parameters

q

value

Returns

1 / q

Definition at line 131 of file rational64.h.

Referenced by av_div_q64().

av_gcd_q64()

AVRational64 av_gcd_q64	(	AVRational64	a,
		AVRational64	b,
		int	max_den,
		AVRational64	def
	)

Return the best rational so that a and b are multiple of it.

If the resulting denominator is larger than max_den, return def.