java.lang.Object | |
↳ | android.hardware.camera2.DngCreator |
The DngCreator
class provides functions to write raw pixel data as a DNG file.
This class is designed to be used with the RAW_SENSOR
buffers available from CameraDevice
, or with Bayer-type raw
pixel data that is otherwise generated by an application. The DNG metadata tags will be
generated from a CaptureResult
object or set directly.
The DNG file format is a cross-platform file format that is used to store pixel data from camera sensors with minimal pre-processing applied. DNG files allow for pixel data to be defined in a user-defined colorspace, and have associated metadata that allow for this pixel data to be converted to the standard CIE XYZ colorspace during post-processing.
For more information on the DNG file format and associated metadata, please refer to the Adobe DNG 1.4.0.0 specification.
Public Constructors | |||||||||||
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Create a new DNG object.
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Public Methods | |||||||||||
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Closes the object and release any system resources it holds.
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Write the pixel data to a DNG file with the currently configured metadata.
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Protected Methods | |||||||||||
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Invoked when the garbage collector has detected that this instance is no longer reachable.
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Inherited Methods | |||||||||||
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From class
java.lang.Object
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From interface
java.lang.AutoCloseable
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Create a new DNG object.
It is not necessary to call any set methods to write a well-formatted DNG file.
DNG metadata tags will be generated from the corresponding parameters in the
CaptureResult
object. This removes or overrides
all previous tags set.
characteristics | an object containing the static
CameraCharacteristics . |
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metadata | a metadata object to generate tags from. |
Closes the object and release any system resources it holds.
Write the pixel data to a DNG file with the currently configured metadata.
For this method to succeed, the Image
input must contain
RAW_SENSOR
pixel data, otherwise an
IllegalArgumentException
will be thrown.
dngOutput | an OutputStream to write the DNG file to. |
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pixels | an Image to write. |
IOException | if an error was encountered in the output stream. |
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IllegalArgumentException | if an image with an unsupported format was used. |
IllegalStateException | if not enough metadata information has been set to write a well-formatted DNG file. |
Invoked when the garbage collector has detected that this instance is no longer reachable. The default implementation does nothing, but this method can be overridden to free resources.
Note that objects that override finalize
are significantly more expensive than
objects that don't. Finalizers may be run a long time after the object is no longer
reachable, depending on memory pressure, so it's a bad idea to rely on them for cleanup.
Note also that finalizers are run on a single VM-wide finalizer thread,
so doing blocking work in a finalizer is a bad idea. A finalizer is usually only necessary
for a class that has a native peer and needs to call a native method to destroy that peer.
Even then, it's better to provide an explicit close
method (and implement
Closeable
), and insist that callers manually dispose of instances. This
works well for something like files, but less well for something like a BigInteger
where typical calling code would have to deal with lots of temporaries. Unfortunately,
code that creates lots of temporaries is the worst kind of code from the point of view of
the single finalizer thread.
If you must use finalizers, consider at least providing your own
ReferenceQueue
and having your own thread process that queue.
Unlike constructors, finalizers are not automatically chained. You are responsible for
calling super.finalize()
yourself.
Uncaught exceptions thrown by finalizers are ignored and do not terminate the finalizer thread. See Effective Java Item 7, "Avoid finalizers" for more.
Throwable |
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