tsBitRate.h File Reference

Implementation of bitrates in bits/second. More...

Namespaces
namespace	ts
	TSDuck namespace, containing all TSDuck classes and functions.

Macros
#define	TS_BITRATE_DECIMALS   1
	Define the precision (number of decimal digits) of fixed-point bitrate values.
#define	TS_BITRATE_DISPLAY_DECIMALS   2
	Define the displayed precision (number of decimal digits) of floating-point bitrate values.
#define	TS_BITRATE_FIXED   1
	If this symbol is defined, bitrate values are represented as fixed-point.
#define	TS_BITRATE_FLOAT   1
	If this symbol is defined, bitrate values are represented as double floating-point.
#define	TS_BITRATE_FRACTION   1
	If this symbol is defined, bitrate values are represented as fractions of 64-bit integers.
#define	TS_BITRATE_INTEGER   1
	If this symbol is defined, bitrate values are represented as unsigned 64-bit integers.

Typedefs
using	ts::BitRate = user_defined
	Bitrate in bits/second.

Detailed Description

Implementation of bitrates in bits/second.

Macro Definition Documentation

TS_BITRATE_INTEGER

#define TS_BITRATE_INTEGER   1

If this symbol is defined, bitrate values are represented as unsigned 64-bit integers.

See also

ts::Integer

ts::BitRate

TS_BITRATE_FRACTION

#define TS_BITRATE_FRACTION   1

If this symbol is defined, bitrate values are represented as fractions of 64-bit integers.

Using fractions instead of fixed-point numbers gives a better precision but seriously impacts the overall performance of computations involving bitrates. The experience also demonstractes that using fractions for bitrates introduces intermediate overflows, making long computations on bitrates unusable in practice. Using fractions for bitrates is therefore currenly discouraged, until a new implementation of fractions absorbs intermediate overflows using approximated fraction reduction, at the expense of a loss of precision.

See also

ts::Fraction

ts::BitRate

TS_BITRATE_FLOAT

#define TS_BITRATE_FLOAT   1

If this symbol is defined, bitrate values are represented as double floating-point.

Using floating-point instead of fixed-point numbers may give a better precision in some cases.

This is currently the default.

See also

ts::Double

ts::BitRate

TS_BITRATE_FIXED

#define TS_BITRATE_FIXED   1

If this symbol is defined, bitrate values are represented as fixed-point.

The number of decimal digits is set by the macro TS_BITRATE_DECIMALS.

See also

ts::FixedPoint

ts::BitRate

TS_BITRATE_DECIMALS

TS_BITRATE_DECIMALS

#define TS_BITRATE_DECIMALS   1

Define the precision (number of decimal digits) of fixed-point bitrate values.

This is used when bitrates are represented as fixed-point numbers instead of fractions or floating-point.

See also

ts::FixedPoint

ts::BitRate

TS_BITRATE_FIXED

TS_BITRATE_DISPLAY_DECIMALS

#define TS_BITRATE_DISPLAY_DECIMALS   2

Define the displayed precision (number of decimal digits) of floating-point bitrate values.

This is used when bitrates are represented as floating-point numbers instead of fractions or fixed-point.

See also

ts::FloatingPoint

ts::BitRate

TS_BITRATE_FLOAT