Package org.webrtc

Class DynamicBitrateAdjuster

java.lang.Object

org.webrtc.BaseBitrateAdjuster

org.webrtc.DynamicBitrateAdjuster

All Implemented Interfaces:

BitrateAdjuster

class DynamicBitrateAdjuster
extends BaseBitrateAdjuster

BitrateAdjuster that tracks the bandwidth produced by an encoder and dynamically adjusts the bitrate. Used for hardware codecs that pay attention to framerate but still deviate from the target bitrate by unacceptable margins.

Field Summary

Fields

Modifier and Type	Field	Description
private static final double	BITRATE_ADJUSTMENT_MAX_SCALE
private static final double	BITRATE_ADJUSTMENT_SEC
private static final int	BITRATE_ADJUSTMENT_STEPS
private int	bitrateAdjustmentScaleExp
private static final double	BITS_PER_BYTE
private double	deviationBytes
private double	timeSinceLastAdjustmentMs

Fields inherited from class org.webrtc.BaseBitrateAdjuster

targetBitrateBps, targetFramerateFps

Constructor Summary

Constructors

Constructor	Description
DynamicBitrateAdjuster()

Method Summary

Modifier and Type	Method	Description
int	getAdjustedBitrateBps()	Gets the current bitrate.
private double	getBitrateAdjustmentScale()
void	reportEncodedFrame(int size)	Should be used to report the size of an encoded frame to the bitrate adjuster.
void	setTargets(int targetBitrateBps, double targetFramerateFps)	Sets the target bitrate in bits per second and framerate in frames per second.

Methods inherited from class org.webrtc.BaseBitrateAdjuster

getAdjustedFramerateFps

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

BITRATE_ADJUSTMENT_SEC

private static final double BITRATE_ADJUSTMENT_SEC

See Also:

• Constant Field Values

BITRATE_ADJUSTMENT_MAX_SCALE

private static final double BITRATE_ADJUSTMENT_MAX_SCALE

See Also:

• Constant Field Values

BITRATE_ADJUSTMENT_STEPS

private static final int BITRATE_ADJUSTMENT_STEPS

See Also:

• Constant Field Values

BITS_PER_BYTE

private static final double BITS_PER_BYTE

See Also:

• Constant Field Values

deviationBytes

private double deviationBytes

timeSinceLastAdjustmentMs

private double timeSinceLastAdjustmentMs

bitrateAdjustmentScaleExp

private int bitrateAdjustmentScaleExp

Constructor Details

DynamicBitrateAdjuster

DynamicBitrateAdjuster()

Method Details

setTargets

public void setTargets(int targetBitrateBps,
 double targetFramerateFps)

Description copied from interface: BitrateAdjuster

Sets the target bitrate in bits per second and framerate in frames per second.

Specified by:

setTargets in interface BitrateAdjuster

Overrides:

setTargets in class BaseBitrateAdjuster

reportEncodedFrame

public void reportEncodedFrame(int size)

Description copied from interface: BitrateAdjuster

Should be used to report the size of an encoded frame to the bitrate adjuster. Use getAdjustedBitrateBps to get the updated bitrate after calling this method.

Specified by:

reportEncodedFrame in interface BitrateAdjuster

Overrides:

reportEncodedFrame in class BaseBitrateAdjuster

getBitrateAdjustmentScale

private double getBitrateAdjustmentScale()

getAdjustedBitrateBps

public int getAdjustedBitrateBps()

Description copied from interface: BitrateAdjuster

Gets the current bitrate.

Specified by:

getAdjustedBitrateBps in interface BitrateAdjuster

Overrides:

getAdjustedBitrateBps in class BaseBitrateAdjuster