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SubtitleData

public final class SubtitleData
extends Object implements VersionedParcelable

java.lang.Object
   ↳ androidx.media2.common.SubtitleData


Class encapsulating subtitle data, as received through the SessionPlayer.PlayerCallback.onSubtitleData(SessionPlayer, MediaItem, SessionPlayer.TrackInfo, SubtitleData) interface. The subtitle data includes:

  • the start time (in microseconds) of the data
  • the duration (in microseconds) of the data
  • the actual data.
The data is stored in a byte-array, and is encoded in one of the supported in-band subtitle formats. The subtitle encoding is determined by the MIME type of the SessionPlayer.TrackInfo of the subtitle track, one of MediaFormat.MIMETYPE_TEXT_CEA_608 or MediaFormat.MIMETYPE_TEXT_CEA_708.

Here is an example of iterating over the tracks of a SessionPlayer, and checking which encoding is used for the subtitle tracks:

 // Initialize instance of player that extends SessionPlayer
 SessionPlayerExtension player = new SessionPlayerExtension();

 final TrackInfo[] trackInfos = player.getTrackInfo();
 for (TrackInfo info : trackInfo) {
     if (info.getTrackType() == TrackInfo.MEDIA_TRACK_TYPE_SUBTITLE) {
         final String mime = info.getFormat().getString(MediaFormat.KEY_MIME);
         if ("text/cea-608".equals(mime) {
             // subtitle encoding is CEA 608
         } else if ("text/cea-708".equals(mime) {
             // subtitle encoding is CEA 708
         }
     }
 }
 

Summary

Public constructors

SubtitleData(long startTimeUs, long durationUs, byte[] data)

Public methods

boolean equals(Object o)
byte[] getData()

Returns the encoded data for the subtitle content.

long getDurationUs()

Returns the duration in microsecond during which the subtitle should be displayed.

long getStartTimeUs()

Returns the media time at which the subtitle should be displayed, expressed in microseconds.

int hashCode()

Inherited methods

Public constructors

SubtitleData

public SubtitleData (long startTimeUs, 
                long durationUs, 
                byte[] data)

Parameters
startTimeUs long

durationUs long

data byte

Public methods

equals

public boolean equals (Object o)

Parameters
o Object

Returns
boolean

getData

public byte[] getData ()

Returns the encoded data for the subtitle content. Encoding format depends on the subtitle type, refer to CEA 708, and CEA/EIA 608 defined by the MIME type of the subtitle track.

Returns
byte[] the encoded subtitle data

getDurationUs

public long getDurationUs ()

Returns the duration in microsecond during which the subtitle should be displayed.

Returns
long the display duration for the subtitle

getStartTimeUs

public long getStartTimeUs ()

Returns the media time at which the subtitle should be displayed, expressed in microseconds.

Returns
long the display start time for the subtitle

hashCode

public int hashCode ()

Returns
int