#include <limits.h>
#include "common.h"
#include "mathematics.h"
#include "rational.h"
Go to the source code of this file.
Defines | |
#define | LOG2 0.69314718055994530941723212145817656807550013436025 |
Functions | |
int | av_reduce (int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max) |
Reduce a fraction. | |
AVRational | av_mul_q (AVRational b, AVRational c) |
Multiplies two rationals. | |
AVRational | av_div_q (AVRational b, AVRational c) |
Divides one rational by another. | |
AVRational | av_add_q (AVRational b, AVRational c) |
Adds two rationals. | |
AVRational | av_sub_q (AVRational b, AVRational c) |
Subtracts one rational from another. | |
AVRational | av_d2q (double d, int max) |
Converts a double precision floating point number to a rational. |
Definition in file rational.c.
#define LOG2 0.69314718055994530941723212145817656807550013436025 |
Referenced by av_d2q().
AVRational av_add_q | ( | AVRational | b, | |
AVRational | c | |||
) |
Adds two rationals.
b | first rational. | |
c | second rational. |
Definition at line 86 of file rational.c.
Referenced by av_sub_q().
AVRational av_d2q | ( | double | d, | |
int | max | |||
) |
Converts a double precision floating point number to a rational.
d | double to convert | |
max | the maximum allowed numerator and denominator |
Definition at line 95 of file rational.c.
Referenced by av_get_q(), av_opt_set_defaults2(), av_parse_video_frame_rate(), av_set_number(), mpeg_decode_postinit(), new_video_stream(), nuv_header(), and thp_read_header().
AVRational av_div_q | ( | AVRational | b, | |
AVRational | c | |||
) |
Divides one rational by another.
b | first rational. | |
c | second rational. |
Definition at line 82 of file rational.c.
Referenced by avi_read_header(), and mpeg_decode_postinit().
AVRational av_mul_q | ( | AVRational | b, | |
AVRational | c | |||
) |
Multiplies two rationals.
b | first rational. | |
c | second rational. |
Definition at line 77 of file rational.c.
Referenced by av_div_q(), and mkv_write_tracks().
int av_reduce | ( | int * | dst_nom, | |
int * | dst_den, | |||
int64_t | nom, | |||
int64_t | den, | |||
int64_t | max | |||
) |
Reduce a fraction.
This is useful for framerate calculations.
dst_nom | destination numerator | |
dst_den | destination denominator | |
nom | source numerator | |
den | source denominator | |
max | the maximum allowed for dst_nom & dst_den |
Definition at line 35 of file rational.c.
Referenced by asf_read_header(), av_add_q(), av_d2q(), av_find_stream_info(), av_mul_q(), avcodec_string(), decode_slice_header(), dxa_read_header(), matroska_read_header(), mpeg_decode_postinit(), smacker_read_header(), vmd_read_header(), yuv4_generate_header(), and yuv4_read_header().
AVRational av_sub_q | ( | AVRational | b, | |
AVRational | c | |||
) |
Subtracts one rational from another.
b | first rational. | |
c | second rational. |
Definition at line 91 of file rational.c.
Referenced by new_video_stream().