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TrackChangeEvent

public final class TrackChangeEvent
extends Event implements Parcelable

java.lang.Object
   ↳ android.media.metrics.Event
     ↳ android.media.metrics.TrackChangeEvent

Playback track change event.

Summary

Nested classes

class TrackChangeEvent.Builder

A builder for TrackChangeEvent 

Constants

int TRACK_CHANGE_REASON_ADAPTIVE

Track change reason for adaptive changes.

int TRACK_CHANGE_REASON_INITIAL

Track change reason for initial state.

int TRACK_CHANGE_REASON_MANUAL

Track change reason for manual changes.

int TRACK_CHANGE_REASON_OTHER

Other track change reason.

int TRACK_CHANGE_REASON_UNKNOWN

Unknown track change reason.

int TRACK_STATE_OFF

The track is off.

int TRACK_STATE_ON

The track is on.

int TRACK_TYPE_AUDIO

Audio track.

int TRACK_TYPE_TEXT

Text track.

int TRACK_TYPE_VIDEO

Video track.

Inherited constants

Fields

public static final Creator<TrackChangeEvent> CREATOR

Public methods

int describeContents()

Describe the kinds of special objects contained in this Parcelable instance's marshaled representation.

boolean equals(Object o)

Indicates whether some other object is "equal to" this one.

int getAudioSampleRate()

Gets audio sample rate.

int getBitrate()

Gets bitrate.

int getChannelCount()

Gets channel count.

String getCodecName()

Gets codec name.

String getContainerMimeType()

Gets container MIME type.

int getHeight()

Gets video height.

String getLanguage()

Gets language code.

String getLanguageRegion()

Gets language region code.

Bundle getMetricsBundle()

Gets metrics-related information that is not supported by dedicated methods.

String getSampleMimeType()

Gets the MIME type of the video/audio/text samples.

long getTimeSinceCreatedMillis()

Gets timestamp since the creation of the log session in milliseconds.

int getTrackChangeReason()

Gets track change reason.

int getTrackState()

Gets track state.

int getTrackType()

Gets the track type.

float getVideoFrameRate()

Gets video frame rate.

int getWidth()

Gets video width.

int hashCode()

Returns a hash code value for the object.

String toString()

Returns a string representation of the object.

void writeToParcel(Parcel dest, int flags)

Flatten this object in to a Parcel.

Inherited methods

Constants

TRACK_CHANGE_REASON_ADAPTIVE

public static final int TRACK_CHANGE_REASON_ADAPTIVE

Track change reason for adaptive changes.

Constant Value: 4 (0x00000004)

TRACK_CHANGE_REASON_INITIAL

public static final int TRACK_CHANGE_REASON_INITIAL

Track change reason for initial state.

Constant Value: 2 (0x00000002)

TRACK_CHANGE_REASON_MANUAL

public static final int TRACK_CHANGE_REASON_MANUAL

Track change reason for manual changes.

Constant Value: 3 (0x00000003)

TRACK_CHANGE_REASON_OTHER

public static final int TRACK_CHANGE_REASON_OTHER

Other track change reason.

Constant Value: 1 (0x00000001)

TRACK_CHANGE_REASON_UNKNOWN

public static final int TRACK_CHANGE_REASON_UNKNOWN

Unknown track change reason.

Constant Value: 0 (0x00000000)

TRACK_STATE_OFF

public static final int TRACK_STATE_OFF

The track is off.

Constant Value: 0 (0x00000000)

TRACK_STATE_ON

public static final int TRACK_STATE_ON

The track is on.

Constant Value: 1 (0x00000001)

TRACK_TYPE_AUDIO

public static final int TRACK_TYPE_AUDIO

Audio track.

Constant Value: 0 (0x00000000)

TRACK_TYPE_TEXT

public static final int TRACK_TYPE_TEXT

Text track.

Constant Value: 2 (0x00000002)

TRACK_TYPE_VIDEO

public static final int TRACK_TYPE_VIDEO

Video track.

Constant Value: 1 (0x00000001)

Fields

CREATOR

public static final Creator<TrackChangeEvent> CREATOR

Public methods

describeContents

public int describeContents ()

Describe the kinds of special objects contained in this Parcelable instance's marshaled representation. For example, if the object will include a file descriptor in the output of writeToParcel(android.os.Parcel, int), the return value of this method must include the CONTENTS_FILE_DESCRIPTOR bit.

Returns
int a bitmask indicating the set of special object types marshaled by this Parcelable object instance. Value is either 0 or CONTENTS_FILE_DESCRIPTOR

equals

public boolean equals (Object o)

Indicates whether some other object is "equal to" this one.

The equals method implements an equivalence relation on non-null object references:

  • It is reflexive: for any non-null reference value x, x.equals(x) should return true.
  • It is symmetric: for any non-null reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true.
  • It is transitive: for any non-null reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.
  • It is consistent: for any non-null reference values x and y, multiple invocations of x.equals(y) consistently return true or consistently return false, provided no information used in equals comparisons on the objects is modified.
  • For any non-null reference value x, x.equals(null) should return false.

The equals method for class Object implements the most discriminating possible equivalence relation on objects; that is, for any non-null reference values x and y, this method returns true if and only if x and y refer to the same object (x == y has the value true).

Note that it is generally necessary to override the hashCode method whenever this method is overridden, so as to maintain the general contract for the hashCode method, which states that equal objects must have equal hash codes.

Parameters
o Object: This value may be null.
Returns
boolean true if this object is the same as the obj argument; false otherwise.

getAudioSampleRate

public int getAudioSampleRate ()

Gets audio sample rate.

Returns
int the sample rate, or -1 if unknown. Value is between -1 and Integer.MAX_VALUE inclusive

getBitrate

public int getBitrate ()

Gets bitrate.

Returns
int the bitrate, or -1 if unknown. Value is between -1 and Integer.MAX_VALUE inclusive

getChannelCount

public int getChannelCount ()

Gets channel count.

Returns
int the channel count, or -1 if unknown. Value is between -1 and Integer.MAX_VALUE inclusive

getCodecName

public String getCodecName ()

Gets codec name.

Returns
String This value may be null.

getContainerMimeType

public String getContainerMimeType ()

Gets container MIME type.

Returns
String This value may be null.

getHeight

public int getHeight ()

Gets video height.

Returns
int the video height, or -1 if unknown. Value is between -1 and Integer.MAX_VALUE inclusive

getLanguage

public String getLanguage ()

Gets language code.

Returns
String a two-letter ISO 639-1 language code. This value may be null.

getLanguageRegion

public String getLanguageRegion ()

Gets language region code.

Returns
String an IETF BCP 47 optional language region subtag based on a two-letter country code. This value may be null.

getMetricsBundle

public Bundle getMetricsBundle ()

Gets metrics-related information that is not supported by dedicated methods.

It is intended to be used for backwards compatibility by the metrics infrastructure.

Returns
Bundle This value cannot be null.

getSampleMimeType

public String getSampleMimeType ()

Gets the MIME type of the video/audio/text samples.

Returns
String This value may be null.

getTimeSinceCreatedMillis

public long getTimeSinceCreatedMillis ()

Gets timestamp since the creation of the log session in milliseconds.

Returns
long the timestamp since the creation in milliseconds, or -1 if unknown. Value is -1 or greater

See also:

getTrackChangeReason

public int getTrackChangeReason ()

Gets track change reason.

Returns
int Value is TRACK_CHANGE_REASON_UNKNOWN, TRACK_CHANGE_REASON_OTHER, TRACK_CHANGE_REASON_INITIAL, TRACK_CHANGE_REASON_MANUAL, or TRACK_CHANGE_REASON_ADAPTIVE

getTrackState

public int getTrackState ()

Gets track state.

Returns
int Value is TRACK_STATE_OFF, or TRACK_STATE_ON

getTrackType

public int getTrackType ()

Gets the track type.

The track type must be one of TRACK_TYPE_AUDIO, TRACK_TYPE_VIDEO, TRACK_TYPE_TEXT.

Returns
int Value is TRACK_TYPE_AUDIO, TRACK_TYPE_VIDEO, or TRACK_TYPE_TEXT

getVideoFrameRate

public float getVideoFrameRate ()

Gets video frame rate.

Returns
float the video frame rate, or -1 if unknown. Value is between -1 and Float.MAX_VALUE inclusive

getWidth

public int getWidth ()

Gets video width.

Returns
int the video width, or -1 if unknown. Value is between -1 and Integer.MAX_VALUE inclusive

hashCode

public int hashCode ()

Returns a hash code value for the object. This method is supported for the benefit of hash tables such as those provided by HashMap.

The general contract of hashCode is:

  • Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
  • If two objects are equal according to the equals(Object) method, then calling the hashCode method on each of the two objects must produce the same integer result.
  • It is not required that if two objects are unequal according to the equals(java.lang.Object) method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.

As much as is reasonably practical, the hashCode method defined by class Object does return distinct integers for distinct objects. (This is typically implemented by converting the internal address of the object into an integer, but this implementation technique is not required by the Java™ programming language.)

Returns
int a hash code value for this object.

toString

public String toString ()

Returns a string representation of the object. In general, the toString method returns a string that "textually represents" this object. The result should be a concise but informative representation that is easy for a person to read. It is recommended that all subclasses override this method.

The toString method for class Object returns a string consisting of the name of the class of which the object is an instance, the at-sign character `@', and the unsigned hexadecimal representation of the hash code of the object. In other words, this method returns a string equal to the value of: 

 getClass().getName() + '@' + Integer.toHexString(hashCode())

Returns
String a string representation of the object.

writeToParcel

public void writeToParcel (Parcel dest, 
                int flags)

Flatten this object in to a Parcel.

Parameters
dest Parcel: This value cannot be null.
flags int: Additional flags about how the object should be written. May be 0 or Parcelable.PARCELABLE_WRITE_RETURN_VALUE. Value is either 0 or a combination of Parcelable.PARCELABLE_WRITE_RETURN_VALUE, and android.os.Parcelable.PARCELABLE_ELIDE_DUPLICATES
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