TestUtil

public static final float PSNR_THRESHOLD = 35.0f

Luma PSNR values between 30 and 50 are considered good for lossy compression (See Quality estimation with PSNR ).

public static void assertBitmapsAreSimilar(
    Bitmap expectedBitmap,
    Bitmap actualBitmap,
    double psnrThresholdDb
)

Asserts whether actual bitmap is very similar to the expected bitmap at some quality level.

This is defined as their PSNR value is greater than or equal to the threshold. The higher the threshold, the more similar they are.

public static void assertBufferInfosEqual(
    MediaCodec.BufferInfo expected,
    MediaCodec.BufferInfo actual
)

Returns whether two BufferInfos are equal.

public static void assertDataSourceContent(
    DataSource dataSource,
    DataSpec dataSpec,
    byte[] expectedData,
    boolean expectKnownLength
)

Asserts that data read from a DataSource matches expected.

public static void assertTimelinesSame(
    List<Timeline> actualTimelines,
    List<Timeline> expectedTimelines
)

Asserts that the actual timelines are the same to the expected timelines. This assert differs from testing equality by not comparing:

• Period IDs, which may be different due to ID mapping of child source period IDs.
• Shuffle order, which by default is random and non-deterministic.

public static Uri buildAssetUri(String assetPath)

Returns the Uri for the given asset path.

public static MediaItem buildFullyCustomizedMediaItem()

Returns a MediaItem that has all fields set to non-default values.

public static byte[] buildTestData(int length)

Equivalent to buildTestData(length, length).

public static byte[] buildTestData(int length, Random random)

Generates an array of random bytes with the specified length.

public static byte[] buildTestData(int length, int seed)

Generates an array of random bytes with the specified length.

public static String buildTestString(int length, Random random)

Generates a random string with the specified length.

public static byte[] createByteArray(int[] bytes)

Converts an array of integers in the range [0, 255] into an equivalent byte array.

public static ByteBuffer createByteBuffer(float[] data)

Creates a ByteBuffer containing the data.

public static ByteBuffer createByteBuffer(short[] data)

Creates a ByteBuffer containing the data.

public static ImmutableList<Byte> createByteList(int[] bytes)

Converts an array of integers in the range [0, 255] into an equivalent byte list.

public static float[] createFloatArray(ByteBuffer byteBuffer)

Gets the underlying data of the ByteBuffer as a float[].

public static MetadataInputBuffer createMetadataInputBuffer(byte[] data)

Create a new MetadataInputBuffer and copy data into the backing .

public static File createTestFile(File directory, String name)

Writes one byte long test data to the file and returns it.

public static File createTestFile(File file, long length)

Writes test data with the specified length to the file and returns it.

public static File createTestFile(File directory, String name, long length)

Writes test data with the specified length to the file and returns it.

public static FakeExtractorOutput extractAllSamplesFromByteArray(Extractor extractor, byte[] data)

Extracts all samples from the given byte array into a FakeTrackOutput.

public static FakeExtractorOutput extractAllSamplesFromFile(
    Extractor extractor,
    Context context,
    String fileName
)

Extracts all samples from the given file into a FakeTrackOutput.

public static FakeExtractorOutput extractAllSamplesFromFilePath(Extractor extractor, String filePath)

Extracts all samples from the given file into a FakeTrackOutput.

public static SeekMap extractSeekMap(
    Extractor extractor,
    FakeExtractorOutput output,
    DataSource dataSource,
    Uri uri
)

Reads from the given input using the given Extractor, until it can produce the and all of the track formats have been identified, or until the extractor encounters EOF.

public static float generateFloatInRange(Random random, Range<Float> range)

Returns a randomly generated float within the specified range, using random as random number generator.

range must be a bounded range.

public static byte[] getByteArray(Context context, String fileName)

Returns the bytes of an asset file.

public static byte[] getByteArrayFromFilePath(String filePath)

Returns the bytes of a file using its file path.

public static ExtractorInput getExtractorInputFromPosition(
    DataSource dataSource,
    long position,
    Uri uri
)

Returns an ExtractorInput to read from the given input at given position.

public static DatabaseProvider getInMemoryDatabaseProvider()

Returns a DatabaseProvider that provides an in-memory database.

public static InputStream getInputStream(Context context, String fileName)

Returns an InputStream for reading from an asset file.

public static List<Method> getPublicMethods(Class<Object> clazz)

Returns all the public methods of a Java class (except those defined by Object).

public static String getString(Context context, String fileName)

Returns a String read from an asset file.

public static Bundle getThrowingBundle()

Returns a Bundle that will throw an exception at the first attempt to read a value.

public static Format retrieveTrackFormat(
    Context context,
    String fileUri,
    @C.TrackType int trackType
)

Returns the Format for a given C.TrackType from a media file.

If more than one track is present for the given C.TrackType then only one track's Format is returned.

public static int seekToTimeUs(
    Extractor extractor,
    SeekMap seekMap,
    long seekTimeUs,
    DataSource dataSource,
    FakeTrackOutput trackOutput,
    Uri uri
)

Seeks to the given seek time of the stream from the given input, and keeps reading from the input until we can extract at least one sample following the seek position, or until end-of-input is reached.

public static boolean timelinesAreSame(Timeline thisTimeline, Timeline thatTimeline)

Returns true if thisTimeline is equal to thatTimeline, ignoring uid and uid values, and shuffle order.