GstGLUtils

Functions

gst_gl_element_propagate_display_context

gst_gl_element_propagate_display_context (GstElement * element,
                                          GstGLDisplay * display)

Parameters:

element –

No description available

display –

No description available

GstGL.prototype.gl_element_propagate_display_context

function GstGL.prototype.gl_element_propagate_display_context(element: Gst.Element, display: GstGL.GLDisplay): {
    // javascript wrapper for 'gst_gl_element_propagate_display_context'
}

Parameters:

element ( Gst.Element ) –

No description available

display ( GstGL.GLDisplay ) –

No description available

GstGL.gl_element_propagate_display_context

def GstGL.gl_element_propagate_display_context (element, display):
    #python wrapper for 'gst_gl_element_propagate_display_context'

Parameters:

element ( Gst.Element ) –

No description available

display ( GstGL.GLDisplay ) –

No description available

gst_gl_ensure_element_data

gboolean
gst_gl_ensure_element_data (gpointer element,
                            GstGLDisplay ** display_ptr,
                            GstGLContext ** other_context_ptr)

Perform the steps necessary for retrieving a GstGLDisplay and (optionally) an application provided GstGLContext from the surrounding elements or from the application using the GstContext mechanism.

If the contents of display_ptr or other_context_ptr are not NULL, then no GstContext query is necessary for GstGLDisplay or GstGLContext retrieval or is performed.

This performs GstContext queries (if necessary) for a winsys display connection with GST_GL_DISPLAY_CONTEXT_TYPE, "gst.x11.display.handle", and "GstWaylandDisplayHandleContextType" stopping after the first successful retrieval.

This also performs a GstContext query (if necessary) for an optional application provided GstGLContext using the name "gst.gl.app_context". The returned GstGLContext will be shared with a GStreamer created OpenGL context.

Parameters:

element –

the GstElement running the query

display_ptr ( [inout] ) –

the resulting GstGLDisplay

other_context_ptr ( [inout] ) –

the resulting GstGLContext

Returns –

whether a GstGLDisplay exists in display_ptr

GstGL.prototype.gl_ensure_element_data

function GstGL.prototype.gl_ensure_element_data(element: Object, display_ptr: GstGL.GLDisplay, other_context_ptr: GstGL.GLContext): {
    // javascript wrapper for 'gst_gl_ensure_element_data'
}

Perform the steps necessary for retrieving a GstGL.GLDisplay and (optionally) an application provided GstGL.GLContext from the surrounding elements or from the application using the Gst.Context mechanism.

If the contents of display_ptr or other_context_ptr are not null, then no Gst.Context query is necessary for GstGL.GLDisplay or GstGL.GLContext retrieval or is performed.

This performs Gst.Context queries (if necessary) for a winsys display connection with GstGL.GL_DISPLAY_CONTEXT_TYPE, "gst.x11.display.handle", and "GstWaylandDisplayHandleContextType" stopping after the first successful retrieval.

This also performs a Gst.Context query (if necessary) for an optional application provided GstGL.GLContext using the name "gst.gl.app_context". The returned GstGL.GLContext will be shared with a GStreamer created OpenGL context.

Parameters:

element ( Object ) –

the Gst.Element running the query

display_ptr ( GstGL.GLDisplay ) –

the resulting GstGL.GLDisplay

other_context_ptr ( GstGL.GLContext ) –

the resulting GstGL.GLContext

Returns a tuple made of:

( Number ) –

whether a GstGL.GLDisplay exists in display_ptr

display_ptr ( GstGL.GLDisplay ) –

whether a GstGL.GLDisplay exists in display_ptr

other_context_ptr ( GstGL.GLContext ) –

whether a GstGL.GLDisplay exists in display_ptr

GstGL.gl_ensure_element_data

def GstGL.gl_ensure_element_data (element, display_ptr, other_context_ptr):
    #python wrapper for 'gst_gl_ensure_element_data'

If the contents of display_ptr or other_context_ptr are not None, then no Gst.Context query is necessary for GstGL.GLDisplay or GstGL.GLContext retrieval or is performed.

Parameters:

element ( object ) –

the Gst.Element running the query

display_ptr ( GstGL.GLDisplay ) –

the resulting GstGL.GLDisplay

other_context_ptr ( GstGL.GLContext ) –

the resulting GstGL.GLContext

Returns a tuple made of:

( bool ) –

whether a GstGL.GLDisplay exists in display_ptr

display_ptr ( GstGL.GLDisplay ) –

whether a GstGL.GLDisplay exists in display_ptr

other_context_ptr ( GstGL.GLContext ) –

whether a GstGL.GLDisplay exists in display_ptr

gst_gl_get_plane_data_size

gsize
gst_gl_get_plane_data_size (GstVideoInfo * info,
                            GstVideoAlignment * align,
                            guint plane)

Retrieve the size in bytes of a video plane of data with a certain alignment

Parameters:

info –

a GstVideoInfo

align –

a GstVideoAlignment or NULL

plane –

plane number in info to retrieve the data size of

Returns –

No description available

GstGL.prototype.gl_get_plane_data_size

function GstGL.prototype.gl_get_plane_data_size(info: GstVideo.VideoInfo, align: GstVideo.VideoAlignment, plane: Number): {
    // javascript wrapper for 'gst_gl_get_plane_data_size'
}

Retrieve the size in bytes of a video plane of data with a certain alignment

Parameters:

info ( GstVideo.VideoInfo ) –

a GstVideo.VideoInfo

align ( GstVideo.VideoAlignment ) –

a GstVideo.VideoAlignment or null

plane ( Number ) –

plane number in info to retrieve the data size of

Returns ( Number ) –

No description available

GstGL.gl_get_plane_data_size

def GstGL.gl_get_plane_data_size (info, align, plane):
    #python wrapper for 'gst_gl_get_plane_data_size'

Retrieve the size in bytes of a video plane of data with a certain alignment

Parameters:

info ( GstVideo.VideoInfo ) –

a GstVideo.VideoInfo

align ( GstVideo.VideoAlignment ) –

a GstVideo.VideoAlignment or None

plane ( int ) –

plane number in info to retrieve the data size of

Returns ( int ) –

No description available

gst_gl_get_plane_start

gsize
gst_gl_get_plane_start (GstVideoInfo * info,
                        GstVideoAlignment * valign,
                        guint plane)

Parameters:

info –

a GstVideoInfo

valign –

a GstVideoAlignment or NULL

plane –

plane number in info to retrieve the data size of

Returns –

difference between the supposed start of the plane from the info and where the data from the previous plane ends.

GstGL.prototype.gl_get_plane_start

function GstGL.prototype.gl_get_plane_start(info: GstVideo.VideoInfo, valign: GstVideo.VideoAlignment, plane: Number): {
    // javascript wrapper for 'gst_gl_get_plane_start'
}

Parameters:

info ( GstVideo.VideoInfo ) –

a GstVideo.VideoInfo

valign ( GstVideo.VideoAlignment ) –

a GstVideo.VideoAlignment or null

plane ( Number ) –

plane number in info to retrieve the data size of

Returns ( Number ) –

difference between the supposed start of the plane from the info and where the data from the previous plane ends.

GstGL.gl_get_plane_start

def GstGL.gl_get_plane_start (info, valign, plane):
    #python wrapper for 'gst_gl_get_plane_start'

Parameters:

info ( GstVideo.VideoInfo ) –

a GstVideo.VideoInfo

valign ( GstVideo.VideoAlignment ) –

a GstVideo.VideoAlignment or None

plane ( int ) –

plane number in info to retrieve the data size of

Returns ( int ) –

difference between the supposed start of the plane from the info and where the data from the previous plane ends.

gst_gl_handle_context_query

gboolean
gst_gl_handle_context_query (GstElement * element,
                             GstQuery * query,
                             GstGLDisplay * display,
                             GstGLContext * context,
                             GstGLContext * other_context)

Parameters:

element –

a GstElement

query –

a GstQuery of type GST_QUERY_CONTEXT

display ( [transfer: none][nullable] ) –

a GstGLDisplay

context ( [transfer: none][nullable] ) –

a GstGLContext

other_context ( [transfer: none][nullable] ) –

application provided GstGLContext

Returns –

Whether the query was successfully responded to from the passed display, context, and other_context.

GstGL.prototype.gl_handle_context_query

function GstGL.prototype.gl_handle_context_query(element: Gst.Element, query: Gst.Query, display: GstGL.GLDisplay, context: GstGL.GLContext, other_context: GstGL.GLContext): {
    // javascript wrapper for 'gst_gl_handle_context_query'
}

Parameters:

element ( Gst.Element ) –

a Gst.Element

query ( Gst.Query ) –

a Gst.Query of type Gst.QueryType.CONTEXT

display ( GstGL.GLDisplay ) –

a GstGL.GLDisplay

context ( GstGL.GLContext ) –

a GstGL.GLContext

other_context ( GstGL.GLContext ) –

application provided GstGL.GLContext

Returns ( Number ) –

Whether the query was successfully responded to from the passed display, context, and other_context.

GstGL.gl_handle_context_query

def GstGL.gl_handle_context_query (element, query, display, context, other_context):
    #python wrapper for 'gst_gl_handle_context_query'

Parameters:

element ( Gst.Element ) –

a Gst.Element

query ( Gst.Query ) –

a Gst.Query of type Gst.QueryType.CONTEXT

display ( GstGL.GLDisplay ) –

a GstGL.GLDisplay

context ( GstGL.GLContext ) –

a GstGL.GLContext

other_context ( GstGL.GLContext ) –

application provided GstGL.GLContext

Returns ( bool ) –

Whether the query was successfully responded to from the passed display, context, and other_context.

gst_gl_handle_set_context

gboolean
gst_gl_handle_set_context (GstElement * element,
                           GstContext * context,
                           GstGLDisplay ** display,
                           GstGLContext ** other_context)

Helper function for implementing set_context() in OpenGL capable elements.

Retrieve's the GstGLDisplay or GstGLContext in context and places the result in display or other_context respectively.

Parameters:

element –

a GstElement

context –

a GstContext

display ( [inout][transfer: full] ) –

location of a GstGLDisplay

other_context ( [inout][transfer: full] ) –

location of a GstGLContext

Returns –

whether the display or other_context could be set successfully

GstGL.prototype.gl_handle_set_context

function GstGL.prototype.gl_handle_set_context(element: Gst.Element, context: Gst.Context, display: GstGL.GLDisplay, other_context: GstGL.GLContext): {
    // javascript wrapper for 'gst_gl_handle_set_context'
}

Helper function for implementing set_context() in OpenGL capable elements.

Retrieve's the GstGL.GLDisplay or GstGL.GLContext in context and places the result in display or other_context respectively.

Parameters:

element ( Gst.Element ) –

a Gst.Element

context ( Gst.Context ) –

a Gst.Context

display ( GstGL.GLDisplay ) –

location of a GstGL.GLDisplay

other_context ( GstGL.GLContext ) –

location of a GstGL.GLContext

Returns a tuple made of:

( Number ) –

whether the display or other_context could be set successfully

display ( GstGL.GLDisplay ) –

whether the display or other_context could be set successfully

other_context ( GstGL.GLContext ) –

whether the display or other_context could be set successfully

GstGL.gl_handle_set_context

def GstGL.gl_handle_set_context (element, context, display, other_context):
    #python wrapper for 'gst_gl_handle_set_context'

Helper function for implementing set_context() in OpenGL capable elements.

Retrieve's the GstGL.GLDisplay or GstGL.GLContext in context and places the result in display or other_context respectively.

Parameters:

element ( Gst.Element ) –

a Gst.Element

context ( Gst.Context ) –

a Gst.Context

display ( GstGL.GLDisplay ) –

location of a GstGL.GLDisplay

other_context ( GstGL.GLContext ) –

location of a GstGL.GLContext

Returns a tuple made of:

( bool ) –

whether the display or other_context could be set successfully

display ( GstGL.GLDisplay ) –

whether the display or other_context could be set successfully

other_context ( GstGL.GLContext ) –

whether the display or other_context could be set successfully

gst_gl_value_get_texture_target_mask

GstGLTextureTarget
gst_gl_value_get_texture_target_mask (const GValue * value)

See gst_gl_value_set_texture_target_from_mask for what entails a mask

Parameters:

value –

an initialized GValue of type G_TYPE_STRING

Returns –

the mask of GstGLTextureTarget's in value or GST_GL_TEXTURE_TARGET_NONE on failure

GstGL.prototype.gl_value_get_texture_target_mask

function GstGL.prototype.gl_value_get_texture_target_mask(value: GObject.Value): {
    // javascript wrapper for 'gst_gl_value_get_texture_target_mask'
}

See GstGL.prototype.gl_value_set_texture_target_from_mask for what entails a mask

Parameters:

value ( GObject.Value ) –

an initialized GObject.Value of type G_TYPE_STRING

Returns ( GstGL.GLTextureTarget ) –

the mask of GstGL.GLTextureTarget's in value or GstGL.GLTextureTarget.NONE on failure

GstGL.gl_value_get_texture_target_mask

def GstGL.gl_value_get_texture_target_mask (value):
    #python wrapper for 'gst_gl_value_get_texture_target_mask'

See GstGL.gl_value_set_texture_target_from_mask for what entails a mask

Parameters:

value ( GObject.Value ) –

an initialized GObject.Value of type G_TYPE_STRING

Returns ( GstGL.GLTextureTarget ) –

the mask of GstGL.GLTextureTarget's in value or GstGL.GLTextureTarget.NONE on failure

gst_gl_value_set_texture_target

gboolean
gst_gl_value_set_texture_target (GValue * value,
                                 GstGLTextureTarget target)

Parameters:

value –

an initialized GValue of type G_TYPE_STRING

target –

a GstGLTextureTarget's

Returns –

whether the target could be set on value

GstGL.prototype.gl_value_set_texture_target

function GstGL.prototype.gl_value_set_texture_target(value: GObject.Value, target: GstGL.GLTextureTarget): {
    // javascript wrapper for 'gst_gl_value_set_texture_target'
}

Parameters:

value ( GObject.Value ) –

an initialized GObject.Value of type G_TYPE_STRING

target ( GstGL.GLTextureTarget ) –

a GstGL.GLTextureTarget's

Returns ( Number ) –

whether the target could be set on value

GstGL.gl_value_set_texture_target

def GstGL.gl_value_set_texture_target (value, target):
    #python wrapper for 'gst_gl_value_set_texture_target'

Parameters:

value ( GObject.Value ) –

an initialized GObject.Value of type G_TYPE_STRING

target ( GstGL.GLTextureTarget ) –

a GstGL.GLTextureTarget's

Returns ( bool ) –

whether the target could be set on value

gst_gl_value_set_texture_target_from_mask

gboolean
gst_gl_value_set_texture_target_from_mask (GValue * value,
                                           GstGLTextureTarget target_mask)

A mask is a bitwise OR of (1 << target) where target is a valid GstGLTextureTarget

Parameters:

value –

an uninitialized GValue

target_mask –

a bitwise mask of GstGLTextureTarget's

Returns –

whether the target_mask could be set on value

GstGL.prototype.gl_value_set_texture_target_from_mask

function GstGL.prototype.gl_value_set_texture_target_from_mask(value: GObject.Value, target_mask: GstGL.GLTextureTarget): {
    // javascript wrapper for 'gst_gl_value_set_texture_target_from_mask'
}

A mask is a bitwise OR of (1 << target) where target is a valid GstGL.GLTextureTarget

Parameters:

value ( GObject.Value ) –

an uninitialized GObject.Value

target_mask ( GstGL.GLTextureTarget ) –

a bitwise mask of GstGL.GLTextureTarget's

Returns ( Number ) –

whether the target_mask could be set on value

GstGL.gl_value_set_texture_target_from_mask

def GstGL.gl_value_set_texture_target_from_mask (value, target_mask):
    #python wrapper for 'gst_gl_value_set_texture_target_from_mask'

A mask is a bitwise OR of (1 << target) where target is a valid GstGL.GLTextureTarget

Parameters:

value ( GObject.Value ) –

an uninitialized GObject.Value

target_mask ( GstGL.GLTextureTarget ) –

a bitwise mask of GstGL.GLTextureTarget's

Returns ( bool ) –

whether the target_mask could be set on value

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