Package org.freedesktop.gstreamer.video

Interface VideoFormatUnpack

All Superinterfaces:

FunctionPointer

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
@Generated("io.github.jwharm.JavaGI")
public interface VideoFormatUnpack
extends FunctionPointer

Functional interface declaration of the VideoFormatUnpack callback.

See Also:

• run(org.freedesktop.gstreamer.video.VideoFormatInfo, java.util.Set<org.freedesktop.gstreamer.video.VideoPackFlags>, java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment, int, int, int)

Method Summary

Modifier and Type	Method	Description
void	run(VideoFormatInfo info, Set<VideoPackFlags> flags, @Nullable MemorySegment dest, @Nullable MemorySegment data, MemorySegment stride, int x, int y, int width)	Unpacks width pixels from the given planes and strides containing data of format info.
default MemorySegment	toCallback(Arena arena)	Creates a native function pointer to the upcall(java.lang.foreign.MemorySegment, int, java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment, int, int, int) method.
default void	upcall(MemorySegment info, int flags, MemorySegment dest, MemorySegment data, MemorySegment stride, int x, int y, int width)	The upcall method is called from native code.

Method Details

run

void run(VideoFormatInfo info,
 Set<VideoPackFlags> flags,
 @Nullable
 @Nullable MemorySegment dest,
 @Nullable
 @Nullable MemorySegment data,
 MemorySegment stride,
 int x,
 int y,
 int width)

Unpacks width pixels from the given planes and strides containing data of format info. The pixels will be unpacked into dest with each component interleaved as per info's unpack_format, which will usually be one of GST_VIDEO_FORMAT_ARGB, GST_VIDEO_FORMAT_AYUV, GST_VIDEO_FORMAT_ARGB64 or GST_VIDEO_FORMAT_AYUV64 depending on the format to unpack. dest should at least be big enough to hold width * bytes_per_pixel bytes where bytes_per_pixel relates to the unpack format and will usually be either 4 or 8 depending on the unpack format. bytes_per_pixel will be the same as the pixel stride for plane 0 for the above formats.

For subsampled formats, the components will be duplicated in the destination array. Reconstruction of the missing components can be performed in a separate step after unpacking.

upcall

default void upcall(MemorySegment info,
 int flags,
 MemorySegment dest,
 MemorySegment data,
 MemorySegment stride,
 int x,
 int y,
 int width)

The upcall method is called from native code. The parameters are marshaled and run(org.freedesktop.gstreamer.video.VideoFormatInfo, java.util.Set<org.freedesktop.gstreamer.video.VideoPackFlags>, java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment, int, int, int) is executed.

toCallback

default MemorySegment toCallback(Arena arena)

Creates a native function pointer to the upcall(java.lang.foreign.MemorySegment, int, java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment, int, int, int) method.

Specified by:

toCallback in interface FunctionPointer

Parameters:

arena - the function pointer will be allocated in this arena

Returns:

the native function pointer