Package org.lwjgl.egl

Class NVStreamMetadata

java.lang.Object

org.lwjgl.egl.NVStreamMetadata

public class NVStreamMetadata
extends java.lang.Object

Native bindings to the NV_stream_metadata extension.

Application suites which make use of streams to transmit images may need to communicate additional data between the producer and consumer, synchronized with the frame updates. This data may change infrequently, such as a movie title and track number to be displayed to the user, or every frame, such as a focal length and exposure time used to process the image. Transmitting this data outside the scope of the stream may be inconvenient, particularly in the case of cross-process streams. But the nature of the data is highly application-dependent, so it is not feasible for an EGL implementation to define specific extensions for a broad range of application data.

This extension provides a means for an application (or application suite in the cross-process case) to associate arbitrary metadata with a stream. Multiple metadata fields are available, allowing them to be updated and used independently by separate subcomponents of producers and consumers, respectively. The format of the data is determined by the application, which is responsible for writing and reading it correctly.

Requires KHR_stream.

Field Summary

Fields

Modifier and Type	Field	Description
static int	EGL_CONSUMER_METADATA_NV	Accepted as name by QueryStreamMetadataNV.
static int	EGL_MAX_STREAM_METADATA_BLOCK_SIZE_NV EGL_MAX_STREAM_METADATA_BLOCKS_NV EGL_MAX_STREAM_METADATA_TOTAL_SIZE_NV	Accepted as attribute by QueryDisplayAttribNV.
static int	EGL_METADATA0_SIZE_NV EGL_METADATA0_TYPE_NV EGL_METADATA1_SIZE_NV EGL_METADATA1_TYPE_NV EGL_METADATA2_SIZE_NV EGL_METADATA2_TYPE_NV EGL_METADATA3_SIZE_NV EGL_METADATA3_TYPE_NV	Accepted in attrib_list by CreateStreamKHR and as attribute by QueryStreamKHR.
static int	EGL_PENDING_METADATA_NV EGL_PRODUCER_METADATA_NV	Accepted as name by QueryStreamMetadataNV.

Method Summary

Modifier and Type	Method	Description
static boolean	eglQueryDisplayAttribNV(long dpy, int attribute, org.lwjgl.PointerBuffer value)
static boolean	eglQueryStreamMetadataNV(long dpy, long stream, int name, int n, int offset, java.nio.ByteBuffer data)
static boolean	eglSetStreamMetadataNV(long dpy, long stream, int n, int offset, java.nio.ByteBuffer data)
static int	neglQueryDisplayAttribNV(long dpy, int attribute, long value)
static int	neglQueryStreamMetadataNV(long dpy, long stream, int name, int n, int offset, int size, long data)
static int	neglSetStreamMetadataNV(long dpy, long stream, int n, int offset, int size, long data)

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

EGL_MAX_STREAM_METADATA_BLOCKS_NV, EGL_MAX_STREAM_METADATA_BLOCK_SIZE_NV, EGL_MAX_STREAM_METADATA_TOTAL_SIZE_NV

Accepted as attribute by QueryDisplayAttribNV.

EGL_PRODUCER_METADATA_NV, EGL_CONSUMER_METADATA_NV, EGL_PENDING_METADATA_NV

Accepted as name by QueryStreamMetadataNV.

EGL_METADATA0_SIZE_NV, EGL_METADATA1_SIZE_NV, EGL_METADATA2_SIZE_NV, EGL_METADATA3_SIZE_NV, EGL_METADATA0_TYPE_NV, EGL_METADATA1_TYPE_NV, EGL_METADATA2_TYPE_NV, EGL_METADATA3_TYPE_NV

Accepted in attrib_list by CreateStreamKHR and as attribute by QueryStreamKHR.

Method Detail

neglQueryDisplayAttribNV

public static int neglQueryDisplayAttribNV(long dpy,
                                           int attribute,
                                           long value)

eglQueryDisplayAttribNV

public static boolean eglQueryDisplayAttribNV(long dpy,
                                              int attribute,
                                              org.lwjgl.PointerBuffer value)

neglSetStreamMetadataNV

public static int neglSetStreamMetadataNV(long dpy,
                                          long stream,
                                          int n,
                                          int offset,
                                          int size,
                                          long data)

eglSetStreamMetadataNV

public static boolean eglSetStreamMetadataNV(long dpy,
                                             long stream,
                                             int n,
                                             int offset,
                                             java.nio.ByteBuffer data)

neglQueryStreamMetadataNV

public static int neglQueryStreamMetadataNV(long dpy,
                                            long stream,
                                            int name,
                                            int n,
                                            int offset,
                                            int size,
                                            long data)

eglQueryStreamMetadataNV

public static boolean eglQueryStreamMetadataNV(long dpy,
                                               long stream,
                                               int name,
                                               int n,
                                               int offset,
                                               java.nio.ByteBuffer data)