AssetLoader.Listener

fun onDurationUs(durationUs: Long): Unit

Called when the duration of the input media is known.

Can be called from any thread.

fun onError(exportException: ExportException!): Unit

Called if an error occurs in the asset loader. In this case, the asset loader will be released automatically.

Can be called from any thread.

fun onOutputFormat(format: Format!): SampleConsumer?

Called when the Format of samples that will be output by the AssetLoader is known.

Must be called after the corresponding track has been added.

For each added track, this method must be called regularly until the returned SampleConsumer is non-null.

Must be called from the thread that will be used to call the returned SampleConsumer's methods. This thread must be the same for all formats output, and is generally different from the one used to access the AssetLoader methods.

fun onTrackAdded(
    inputFormat: Format!,
    @AssetLoader.SupportedOutputTypes supportedOutputTypes: Int
): Boolean

Called when the information on a track is known.

Must be called after the duration and the track count have been reported.

Must be called once per declared track.

Must be called from the thread that will be used to call onOutputFormat.

fun onTrackCount(trackCount: @IntRange(from = 1) Int): Unit

Called when the number of tracks being output is known.

Can be called from any thread.