GstGL.GLFilter¶

Subclasses:: None

Methods¶

Inherited:: GstGL.GLBaseFilter (2), GstBase.BaseTransform (15), Gst.Element (81), Gst.Object (27), GObject.Object (37)
Structs:: Gst.ElementClass (10), GObject.ObjectClass (5)

class	`add_rgba_pad_templates` (klass)
	`draw_fullscreen_quad` ()
	`filter_texture` (input, output)
	`render_to_target` (input, output, func, *data)
	`render_to_target_with_shader` (input, output, shader)

Virtual Methods¶

Inherited:: GstGL.GLBaseFilter (3), GstBase.BaseTransform (22), Gst.Element (16), Gst.Object (1), GObject.Object (7)

	`do_filter` (inbuf, outbuf)
	`do_filter_texture` (input, output)
	`do_init_fbo` ()
	`do_set_caps` (incaps, outcaps)
	`do_transform_internal_caps` (direction, caps, filter_caps)

Properties¶

Inherited:: GstGL.GLBaseFilter (1), GstBase.BaseTransform (1), Gst.Object (2)

Signals¶

Inherited:: Gst.Element (3), Gst.Object (1), GObject.Object (1)

Fields¶

Inherited:: Gst.Element (3), Gst.Object (1), GObject.Object (1)

Name	Type	Access	Description
default_shader	`GstGL.GLShader`	r
draw_attr_position_loc	`int`	r
draw_attr_texture_loc	`int`	r
fbo	`GstGL.GLFramebuffer`	r	`GstGL.GLFramebuffer` object used for transformations (only for subclass usage)
gl_result	`bool`	r
in_info	`GstVideo.VideoInfo`	r	the video info for input buffers
in_texture_target	`GstGL.GLTextureTarget`	r	The texture target of the input buffers (usually 2D)
inbuf	`Gst.Buffer`	r
out_caps	`Gst.Caps`	r	the output `Gst.Caps`
out_info	`GstVideo.VideoInfo`	r	the video info for output buffers
out_texture_target	`GstGL.GLTextureTarget`	r	The texture target of the output buffers (usually 2D)
outbuf	`Gst.Buffer`	r
parent	`GstGL.GLBaseFilter`	r
valid_attributes	`bool`	r
vao	`int`	r
vbo_indices	`int`	r
vertex_buffer	`int`	r

Class Details¶

class GstGL.GLFilter(**kwargs)¶

Bases:: GstGL.GLBaseFilter
Abstract:: No
Structure:: GstGL.GLFilterClass

GstGL.GLFilter helps to implement simple OpenGL filter elements taking a single input and producing a single output with a GstGL.GLFramebuffer

classmethod add_rgba_pad_templates(klass)[source]¶

Parameters:: klass (GstGL.GLFilterClass) –

draw_fullscreen_quad()[source]¶: Render a fullscreen quad using the current GL state. The only GL state this modifies is the necessary vertex/index buffers and, if necessary, a Vertex Array Object for drawing a fullscreen quad. Framebuffer state, any shaders, viewport state, etc must be setup by the caller.

New in version 1.10.

filter_texture(input, output)[source]¶

Parameters:

input (Gst.Buffer) – an input buffer
output (Gst.Buffer) – an output buffer

Returns:

whether the transformation succeeded

Return type:

bool

Calls filter_texture vfunc with correctly mapped GstGL.GLMemorys

New in version 1.4.

render_to_target(input, output, func, *data)[source]¶

Parameters:

input (GstGL.GLMemory) – the input texture
output (GstGL.GLMemory) – the output texture
func (GstGL.GLFilterRenderFunc) – the function to transform input into output. called with data
data (object or None) – the data associated with func

Returns:

the return value of func

Return type:

bool

Transforms input into output using func on through FBO.

New in version 1.10.

render_to_target_with_shader(input, output, shader)[source]¶

Parameters:

input (GstGL.GLMemory) – the input texture
output (GstGL.GLMemory) – the output texture
shader (GstGL.GLShader) – the shader to use.

Transforms input into output using shader with a FBO.

New in version 1.4.

do_filter(inbuf, outbuf) virtual¶

Parameters:

inbuf (Gst.Buffer) –
outbuf (Gst.Buffer) –

Return type:

bool

do_filter_texture(input, output) virtual¶

Parameters:

input (GstGL.GLMemory) – an input buffer
output (GstGL.GLMemory) – an output buffer

Returns:

whether the transformation succeeded

Return type:

bool

Calls filter_texture vfunc with correctly mapped GstGL.GLMemorys

New in version 1.4.

do_init_fbo() virtual¶

Return type:: bool

do_set_caps(incaps, outcaps) virtual¶

Parameters:

incaps (Gst.Caps) –
outcaps (Gst.Caps) –

Return type:

bool

do_transform_internal_caps(direction, caps, filter_caps) virtual¶

Parameters:

direction (Gst.PadDirection) –
caps (Gst.Caps) –
filter_caps (Gst.Caps) –

Return type:

Gst.Caps