EGL_NV_stream_metadata
https://www.khronos.org/registry/egl/specs/eglspec.1.5.pdf
EGL_NV_stream_metadata

	EGL_MAX_STREAM_METADATA_BLOCKS_NV 0x3250
	EGL_MAX_STREAM_METADATA_BLOCK_SIZE_NV 0x3251
	EGL_MAX_STREAM_METADATA_TOTAL_SIZE_NV 0x3252
	EGL_PRODUCER_METADATA_NV 0x3253
	EGL_CONSUMER_METADATA_NV 0x3254
	EGL_METADATA0_SIZE_NV 0x3255
	EGL_METADATA1_SIZE_NV 0x3256
	EGL_METADATA2_SIZE_NV 0x3257
	EGL_METADATA3_SIZE_NV 0x3258
	EGL_METADATA0_TYPE_NV 0x3259
	EGL_METADATA1_TYPE_NV 0x325A
	EGL_METADATA2_TYPE_NV 0x325B
	EGL_METADATA3_TYPE_NV 0x325C
	EGL_PENDING_METADATA_NV 0x3328
	EGLBoolean  eglQueryDisplayAttribNV (EGLDisplay  dpy, EGLint  attribute, EGLAttrib * value)
	EGLBoolean  eglQueryStreamMetadataNV (EGLDisplay  dpy, EGLStreamKHR  stream, EGLenum  name, EGLint  n, EGLint  offset, EGLint  size, void * data)
	EGLBoolean  eglSetStreamMetadataNV (EGLDisplay  dpy, EGLStreamKHR  stream, EGLint  n, EGLint  offset, EGLint  size, const void * data)
