GstVaUtils

Functions

gst_context_get_va_display

gboolean
gst_context_get_va_display (GstContext * context,
                            const gchar * type_name,
                            const gchar * render_device_path,
                            GstVaDisplay ** display_ptr)

Parameters:

context –

a GstContext may contain the display

type_name –

a gchar string of the element type

render_device_path –

the gchar string of render device path

display_ptr ( [out][transfer: full]) –

the GstVaDisplay we get

Returns –

whether we find a valid display in the context

Since : 1.22

GstVa.prototype.context_get_va_display

function GstVa.prototype.context_get_va_display(context: Gst.Context, type_name: String, render_device_path: String): {
    // javascript wrapper for 'gst_context_get_va_display'
}

Parameters:

context (Gst.Context) –

a Gst.Context may contain the display

type_name (String) –

a String string of the element type

render_device_path (String) –

the String string of render device path

Returns a tuple made of:

(Number ) –

whether we find a valid display in the context

display_ptr (GstVa.VaDisplay ) –

whether we find a valid display in the context

Since : 1.22

GstVa.context_get_va_display

def GstVa.context_get_va_display (context, type_name, render_device_path):
    #python wrapper for 'gst_context_get_va_display'

Parameters:

context (Gst.Context) –

a Gst.Context may contain the display

type_name (str) –

a int string of the element type

render_device_path (str) –

the int string of render device path

Returns a tuple made of:

(bool ) –

whether we find a valid display in the context

display_ptr (GstVa.VaDisplay ) –

whether we find a valid display in the context

Since : 1.22

gst_context_set_va_display

gst_context_set_va_display (GstContext * context,
                            GstVaDisplay * display)

Set the display in the context

Parameters:

context –

a GstContext

display –

the GstVaDisplay we want to set

Since : 1.22

GstVa.prototype.context_set_va_display

function GstVa.prototype.context_set_va_display(context: Gst.Context, display: GstVa.VaDisplay): {
    // javascript wrapper for 'gst_context_set_va_display'
}

Set the display in the context

Parameters:

context (Gst.Context) –

a Gst.Context

display (GstVa.VaDisplay) –

the GstVa.VaDisplay we want to set

Since : 1.22

GstVa.context_set_va_display

def GstVa.context_set_va_display (context, display):
    #python wrapper for 'gst_context_set_va_display'

Set the display in the context

Parameters:

context (Gst.Context) –

a Gst.Context

display (GstVa.VaDisplay) –

the GstVa.VaDisplay we want to set

Since : 1.22

gst_va_context_query

gst_va_context_query (GstElement * element,
                      const gchar * context_type)

Query the specified context type name.

Parameters:

element –

a GstElement

context_type –

the gchar string specify the context type name

Since : 1.22

GstVa.prototype.va_context_query

function GstVa.prototype.va_context_query(element: Gst.Element, context_type: String): {
    // javascript wrapper for 'gst_va_context_query'
}

Query the specified context type name.

Parameters:

element (Gst.Element) –

a Gst.Element

context_type (String) –

the String string specify the context type name

Since : 1.22

GstVa.va_context_query

def GstVa.va_context_query (element, context_type):
    #python wrapper for 'gst_va_context_query'

Query the specified context type name.

Parameters:

element (Gst.Element) –

a Gst.Element

context_type (str) –

the int string specify the context type name

Since : 1.22

gst_va_element_propagate_display_context

gst_va_element_propagate_display_context (GstElement * element,
                                          GstVaDisplay * display)

Propagate display by posting it as GstContext in the pipeline's bus.

Parameters:

element –

a GstElement

display –

the GstVaDisplay to propagate

Since : 1.22

GstVa.prototype.va_element_propagate_display_context

function GstVa.prototype.va_element_propagate_display_context(element: Gst.Element, display: GstVa.VaDisplay): {
    // javascript wrapper for 'gst_va_element_propagate_display_context'
}

Propagate display by posting it as Gst.Context in the pipeline's bus.

Parameters:

element (Gst.Element) –

a Gst.Element

display (GstVa.VaDisplay) –

the GstVa.VaDisplay to propagate

Since : 1.22

GstVa.va_element_propagate_display_context

def GstVa.va_element_propagate_display_context (element, display):
    #python wrapper for 'gst_va_element_propagate_display_context'

Propagate display by posting it as Gst.Context in the pipeline's bus.

Parameters:

element (Gst.Element) –

a Gst.Element

display (GstVa.VaDisplay) –

the GstVa.VaDisplay to propagate

Since : 1.22

gst_va_ensure_element_data

gboolean
gst_va_ensure_element_data (gpointer element,
                            const gchar * render_device_path,
                            GstVaDisplay ** display_ptr)

Called by the va element to ensure a valid GstVaDisplay.

Parameters:

element –

a GstElement

render_device_path –

the gchar string of render device path

display_ptr ( [out][transfer: full]) –

The GstVaDisplay to ensure

Returns –

whether a GstVaDisplay exists in display_ptr

Since : 1.22

GstVa.prototype.va_ensure_element_data

function GstVa.prototype.va_ensure_element_data(element: Object, render_device_path: String): {
    // javascript wrapper for 'gst_va_ensure_element_data'
}

Called by the va element to ensure a valid GstVa.VaDisplay.

Parameters:

element (Object) –

a Gst.Element

render_device_path (String) –

the String string of render device path

Returns a tuple made of:

(Number ) –

whether a GstVa.VaDisplay exists in display_ptr

display_ptr (GstVa.VaDisplay ) –

whether a GstVa.VaDisplay exists in display_ptr

Since : 1.22

GstVa.va_ensure_element_data

def GstVa.va_ensure_element_data (element, render_device_path):
    #python wrapper for 'gst_va_ensure_element_data'

Called by the va element to ensure a valid GstVa.VaDisplay.

Parameters:

element (object) –

a Gst.Element

render_device_path (str) –

the int string of render device path

Returns a tuple made of:

(bool ) –

whether a GstVa.VaDisplay exists in display_ptr

display_ptr (GstVa.VaDisplay ) –

whether a GstVa.VaDisplay exists in display_ptr

Since : 1.22

gst_va_handle_context_query

gboolean
gst_va_handle_context_query (GstElement * element,
                             GstQuery * query,
                             GstVaDisplay * display)

Used by elements when processing their pad's queries, propagating element's GstVaDisplay if the processed query requests it.

Parameters:

element –

a GstElement

query –

a GstQuery to query the context

display –

a GstVaDisplay to answer the query

Returns –

whether we can handle the context query successfully

Since : 1.22

GstVa.prototype.va_handle_context_query

function GstVa.prototype.va_handle_context_query(element: Gst.Element, query: Gst.Query, display: GstVa.VaDisplay): {
    // javascript wrapper for 'gst_va_handle_context_query'
}

Used by elements when processing their pad's queries, propagating element's GstVa.VaDisplay if the processed query requests it.

Parameters:

element (Gst.Element) –

a Gst.Element

query (Gst.Query) –

a Gst.Query to query the context

display (GstVa.VaDisplay) –

a GstVa.VaDisplay to answer the query

Returns (Number) –

whether we can handle the context query successfully

Since : 1.22

GstVa.va_handle_context_query

def GstVa.va_handle_context_query (element, query, display):
    #python wrapper for 'gst_va_handle_context_query'

Used by elements when processing their pad's queries, propagating element's GstVa.VaDisplay if the processed query requests it.

Parameters:

element (Gst.Element) –

a Gst.Element

query (Gst.Query) –

a Gst.Query to query the context

display (GstVa.VaDisplay) –

a GstVa.VaDisplay to answer the query

Returns (bool) –

whether we can handle the context query successfully

Since : 1.22

gst_va_handle_set_context

gboolean
gst_va_handle_set_context (GstElement * element,
                           GstContext * context,
                           const gchar * render_device_path,
                           GstVaDisplay ** display_ptr)

Called by elements in their set_context vmethod. It gets a valid GstVaDisplay if context has it.

Parameters:

element –

a GstElement

context –

a GstContext may contain the display

render_device_path –

the gchar string of render device path

display_ptr ( [out][transfer: full]) –

The GstVaDisplay to set

Returns –

whether the display_ptr could be successfully set to a valid GstVaDisplay in the context

Since : 1.22

GstVa.prototype.va_handle_set_context

function GstVa.prototype.va_handle_set_context(element: Gst.Element, context: Gst.Context, render_device_path: String): {
    // javascript wrapper for 'gst_va_handle_set_context'
}

Called by elements in their vfunc_set_context vmethod. It gets a valid GstVa.VaDisplay if context has it.

Parameters:

element (Gst.Element) –

a Gst.Element

context (Gst.Context) –

a Gst.Context may contain the display

render_device_path (String) –

the String string of render device path

Returns a tuple made of:

(Number ) –

whether the display_ptr could be successfully set to a valid GstVa.VaDisplay in the context

display_ptr (GstVa.VaDisplay ) –

whether the display_ptr could be successfully set to a valid GstVa.VaDisplay in the context

Since : 1.22

GstVa.va_handle_set_context

def GstVa.va_handle_set_context (element, context, render_device_path):
    #python wrapper for 'gst_va_handle_set_context'

Called by elements in their do_set_context vmethod. It gets a valid GstVa.VaDisplay if context has it.

Parameters:

element (Gst.Element) –

a Gst.Element

context (Gst.Context) –

a Gst.Context may contain the display

render_device_path (str) –

the int string of render device path

Returns a tuple made of:

(bool ) –

whether the display_ptr could be successfully set to a valid GstVa.VaDisplay in the context

display_ptr (GstVa.VaDisplay ) –

whether the display_ptr could be successfully set to a valid GstVa.VaDisplay in the context

Since : 1.22

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