TrackEncryptionBox

Artifact: androidx.media3:media3-extractor

Kotlin |Java

@UnstableApi
public final class TrackEncryptionBox

Encapsulates information parsed from a track encryption (tenc) box or sample group description (sgpd) box in an MP4 stream.

Summary

Public fields
`final TrackOutput.CryptoData`	`cryptoData` A `TrackOutput.CryptoData` instance containing the encryption information from this `TrackEncryptionBox`.
`final @Nullable byte[]`	`defaultInitializationVector` If `perSampleIvSize` is 0, holds the default initialization vector as defined in the track encryption box or sample group description box.
`final boolean`	`isEncrypted` Indicates the encryption state of the samples in the sample group.
`final int`	`perSampleIvSize` The initialization vector size in bytes for the samples in the corresponding sample group.
`final @Nullable String`	`schemeType` The protection scheme type, as defined by the 'schm' box, or null if unknown.

Public constructors
`TrackEncryptionBox( boolean isEncrypted, @Nullable String schemeType, int perSampleIvSize, byte[] keyId, int defaultEncryptedBlocks, int defaultClearBlocks, @Nullable byte[] defaultInitializationVector )`

Public fields

cryptoData

public final TrackOutput.CryptoData cryptoData

A TrackOutput.CryptoData instance containing the encryption information from this TrackEncryptionBox.

defaultInitializationVector

public final @Nullable byte[] defaultInitializationVector

If perSampleIvSize is 0, holds the default initialization vector as defined in the track encryption box or sample group description box. Null otherwise.

isEncrypted

public final boolean isEncrypted

Indicates the encryption state of the samples in the sample group.

perSampleIvSize

public final int perSampleIvSize

The initialization vector size in bytes for the samples in the corresponding sample group.

schemeType

public final @Nullable String schemeType

The protection scheme type, as defined by the 'schm' box, or null if unknown.

Public constructors

TrackEncryptionBox

public TrackEncryptionBox(
    boolean isEncrypted,
    @Nullable String schemeType,
    int perSampleIvSize,
    byte[] keyId,
    int defaultEncryptedBlocks,
    int defaultClearBlocks,
    @Nullable byte[] defaultInitializationVector
)

Parameters
`boolean isEncrypted`	See `isEncrypted`.
`@Nullable String schemeType`	See `schemeType`.
`int perSampleIvSize`	See `perSampleIvSize`.
`byte[] keyId`	See `encryptionKey`.
`int defaultEncryptedBlocks`	See `encryptedBlocks`.
`int defaultClearBlocks`	See `clearBlocks`.
`@Nullable byte[] defaultInitializationVector`	See `defaultInitializationVector`.