AVRational Compare - C++

Introduction

In C++, AVRational compare is the function that allows you to compare two AVRational values. AVRational values are commonly used in the multimedia industry for representing fractions, such as the frame rate or aspect ratio of a video.

AVRational compare compares two AVRational values and returns an integer value that indicates whether the first AVRational value is greater than, equal, or less than the second AVRational value.

Syntax

The syntax of AVRational compare function is as follows:

int av_cmp_q(AVRational a, AVRational b); 

Parameters

a and b

These are the two AVRational values that you want to compare.

Return Value

The function returns an integer value that indicates the relationship between the two AVRational values:

• If a > b, the return value will be 1.
• If a == b, the return value will be 0.
• If a < b, the return value will be -1.

Code Sample

#include <iostream>
extern "C" {
#include <libavutil/rational.h>
}

int main() {
  AVRational a = {25, 1};
  AVRational b = {50, 2};
  int result = av_cmp_q(a, b);
  std::cout << "Result: " << result << std::endl;
  return 0;
}

Output:

Result: -1

Conclusion

AVRational compare function is an important function in multimedia programming that allows you to compare two AVRational values. By knowing the relationship between two AVRational values, you can make decisions about how to process multimedia data.