hvirtual/quicktime/ffmpeg/libavcodec/rational.h File Reference

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Data Structures
struct	AVRational
Functions
static int	av_cmp_q (AVRational a, AVRational b)
static double	av_q2d (AVRational a)
AVRational	av_mul_q (AVRational b, AVRational c)
AVRational	av_div_q (AVRational b, AVRational c)
AVRational	av_add_q (AVRational b, AVRational c)
AVRational	av_sub_q (AVRational b, AVRational c)
AVRational	av_d2q (double d, int max)

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Detailed Description

Rational numbers.

Author:

Michael Niedermayer <michaelni@gmx.at>

Definition in file rational.h.

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Function Documentation

AVRational av_add_q	(	AVRational	b,
		AVRational	c
	)

returns b+c.

Definition at line 53 of file rational.c.

References av_reduce(), AVRational::den, and AVRational::num.

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static int av_cmp_q	(	AVRational	a,
		AVRational	b
	)			[inline, static]

returns 0 if a==b, 1 if a>b and -1 if a<b.

Definition at line 41 of file rational.h.

References AVRational::den, and AVRational::num.

Referenced by new_video_stream().

AVRational av_d2q	(	double	d,
		int	max
	)

Converts a double precission floating point number to a AVRational.

Parameters:

max

the maximum allowed numerator and denominator

Definition at line 70 of file rational.c.

References a, ABS, av_reduce(), AVRational::den, e, LL, and AVRational::num.

Referenced by mpeg_decode_postinit(), and new_video_stream().

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AVRational av_div_q	(	AVRational	b,
		AVRational	c
	)

returns b/c.

Definition at line 45 of file rational.c.

References av_reduce(), AVRational::den, and AVRational::num.

Referenced by mpeg_decode_postinit().

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AVRational av_mul_q	(	AVRational	b,
		AVRational	c
	)

returns b*c.

Definition at line 37 of file rational.c.

References av_reduce(), AVRational::den, and AVRational::num.

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static double av_q2d

(

AVRational

a

)

[inline, static]

converts the given AVRational to a double.

Definition at line 51 of file rational.h.

References AVRational::den, and AVRational::num.

Referenced by audio_decode_frame(), av_encode(), avcodec_string(), do_video_out(), do_video_stats(), ff_rate_control_init(), ff_rate_estimate_qscale(), ff_vbv_update(), init_pass2(), modify_qscale(), opt_input_file(), output_picture2(), video_image_display(), and video_thread().

AVRational av_sub_q	(	AVRational	b,
		AVRational	c
	)

returns b-c.

Definition at line 61 of file rational.c.

References av_reduce(), AVRational::den, and AVRational::num.

Referenced by new_video_stream().

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