EmptySampleStream

Artifact: androidx.media3:media3-exoplayer

Kotlin |Java

@UnstableApi
public final class EmptySampleStream implements SampleStream

An empty SampleStream.

Summary

Public constructors
`EmptySampleStream()`

Public methods
`boolean`	`isReady()` Returns whether data is available to be read.
`void`	`maybeThrowError()` Throws an error that's preventing data from being read.
`int`	`readData( FormatHolder formatHolder, DecoderInputBuffer buffer, @SampleStream.ReadFlags int readFlags )` Attempts to read from the stream.
`int`	`skipData(long positionUs)` Attempts to skip to the keyframe before the specified position, or to the end of the stream if `positionUs` is beyond it.

Inherited Constants

From androidx.media3.exoplayer.source.SampleStream

`static final int`	`FLAG_OMIT_SAMPLE_DATA = 4` Specifies that `data`, `supplementalData` and `cryptoInfo` should not be populated when reading a sample buffer.
`static final int`	`FLAG_PEEK = 1` Specifies that the read position should not be advanced if a sample buffer is read.
`static final int`	`FLAG_REQUIRE_FORMAT = 2` Specifies that if a sample buffer would normally be read next, the format of the stream should be read instead.

Public constructors

EmptySampleStream

public EmptySampleStream()

Public methods

isReady

public boolean isReady()

Returns whether data is available to be read.

Note: If the stream has ended then a buffer with the end of stream flag can always be read from readData. Hence an ended stream is always ready.

Returns
`boolean`	Whether data is available to be read.

maybeThrowError

public void maybeThrowError()

Throws an error that's preventing data from being read. Does nothing if no such error exists.

Throws
`java.io.IOException`	The underlying error.

readData

public int readData(
    FormatHolder formatHolder,
    DecoderInputBuffer buffer,
    @SampleStream.ReadFlags int readFlags
)

Attempts to read from the stream.

If the stream has ended then BUFFER_FLAG_END_OF_STREAM flag is set on buffer and RESULT_BUFFER_READ is returned. Else if no data is available then RESULT_NOTHING_READ is returned. Else if the format of the media is changing or if formatRequired is set then formatHolder is populated and RESULT_FORMAT_READ is returned. Else buffer is populated and RESULT_BUFFER_READ is returned.

Parameters
`FormatHolder formatHolder`	A `FormatHolder` to populate in the case of reading a format.
`DecoderInputBuffer buffer`	A `DecoderInputBuffer` to populate in the case of reading a sample or the end of the stream. If the end of the stream has been reached, the `BUFFER_FLAG_END_OF_STREAM` flag will be set on the buffer.
`@SampleStream.ReadFlags int readFlags`	Flags controlling the behavior of this read operation.

Returns
`int`	The `result` of the read operation.

Throws
`androidx.media3.decoder.DecoderInputBuffer.InsufficientCapacityException`	If the `buffer` has insufficient capacity to hold the data of a sample being read. The buffer `timestamp` and flags are populated if this exception is thrown, but the read position is not advanced.

skipData

public int skipData(long positionUs)

Attempts to skip to the keyframe before the specified position, or to the end of the stream if positionUs is beyond it.

Parameters
`long positionUs`	The specified time.

Returns
`int`	The number of samples that were skipped.