GstGLFilter

GstGLFilter helps to implement simple OpenGL filter elements taking a single input and producing a single output with a GstGLFramebuffer

GstGLFilter

GObject
    ╰──GInitiallyUnowned
        ╰──GstObject
            ╰──GstElement
                ╰──GstBaseTransform
                    ╰──GstGLBaseFilter
                        ╰──GstGLFilter

Members

parent (GstGLBaseFilter) –
No description available
in_info (GstVideoInfo) –

the video info for input buffers

out_info (GstVideoInfo) –

the video info for output buffers

in_texture_target (GstGLTextureTarget) –

The texture target of the input buffers (usually 2D)

out_texture_target (GstGLTextureTarget) –

The texture target of the output buffers (usually 2D)

out_caps (GstCaps *) –

the output GstCaps

fbo (GstGLFramebuffer *) –

GstGLFramebuffer object used for transformations (only for subclass usage)


Class structure

GstGLFilterClass

Fields
parent_class (GstGLBaseFilterClass) –
No description available

GstGL.GLFilterClass

Attributes
parent_class (GstGL.GLBaseFilterClass) –
No description available

GstGL.GLFilterClass

Attributes
parent_class (GstGL.GLBaseFilterClass) –
No description available

GstGLFilter

GObject
    ╰──GInitiallyUnowned
        ╰──GstObject
            ╰──GstElement
                ╰──GstBaseTransform
                    ╰──GstGLBaseFilter
                        ╰──GstGLFilter

Members

parent (GstGLBaseFilter) –
No description available
in_info (GstVideoInfo) –

the video info for input buffers

out_info (GstVideoInfo) –

the video info for output buffers

in_texture_target (GstGLTextureTarget) –

The texture target of the input buffers (usually 2D)

out_texture_target (GstGLTextureTarget) –

The texture target of the output buffers (usually 2D)

out_caps (GstCaps) –

the output GstCaps

fbo (GstGLFramebuffer) –

GstGLFramebuffer object used for transformations (only for subclass usage)


GstGLFilter

GObject
    ╰──GInitiallyUnowned
        ╰──GstObject
            ╰──GstElement
                ╰──GstBaseTransform
                    ╰──GstGLBaseFilter
                        ╰──GstGLFilter

Members

parent (GstGLBaseFilter) –
No description available
in_info (GstVideoInfo) –

the video info for input buffers

out_info (GstVideoInfo) –

the video info for output buffers

in_texture_target (GstGLTextureTarget) –

The texture target of the input buffers (usually 2D)

out_texture_target (GstGLTextureTarget) –

The texture target of the output buffers (usually 2D)

out_caps (GstCaps) –

the output GstCaps

fbo (GstGLFramebuffer) –

GstGLFramebuffer object used for transformations (only for subclass usage)


Methods

gst_gl_filter_draw_fullscreen_quad

gst_gl_filter_draw_fullscreen_quad (GstGLFilter * filter)

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.

Parameters:

filter

a GstGLFilter

Since : 1.10


GstGL.GLFilter.prototype.draw_fullscreen_quad

function GstGL.GLFilter.prototype.draw_fullscreen_quad(): {
    // javascript wrapper for 'gst_gl_filter_draw_fullscreen_quad'
}

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.

Parameters:

filter ( GstGL.GLFilter ) –

a GstGL.GLFilter

Since : 1.10


GstGL.GLFilter.draw_fullscreen_quad

def GstGL.GLFilter.draw_fullscreen_quad (self):
    #python wrapper for 'gst_gl_filter_draw_fullscreen_quad'

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.

Parameters:

filter ( GstGL.GLFilter ) –

a GstGL.GLFilter

Since : 1.10


gst_gl_filter_filter_texture

gboolean
gst_gl_filter_filter_texture (GstGLFilter * filter,
                              GstBuffer * input,
                              GstBuffer * output)

Calls filter_texture vfunc with correctly mapped GstGLMemory

Parameters:

filter

a GstGLFilter

input

an input buffer

output

an output buffer

Returns

whether the transformation succeeded

Since : 1.4


GstGL.GLFilter.prototype.filter_texture

function GstGL.GLFilter.prototype.filter_texture(input: Gst.Buffer, output: Gst.Buffer): {
    // javascript wrapper for 'gst_gl_filter_filter_texture'
}

Calls filter_texture vfunc with correctly mapped GstGL.GLMemory

Parameters:

filter ( GstGL.GLFilter ) –

a GstGL.GLFilter

input ( Gst.Buffer ) –

an input buffer

output ( Gst.Buffer ) –

an output buffer

Returns ( Number ) –

whether the transformation succeeded

Since : 1.4


GstGL.GLFilter.filter_texture

def GstGL.GLFilter.filter_texture (self, input, output):
    #python wrapper for 'gst_gl_filter_filter_texture'

Calls filter_texture vfunc with correctly mapped GstGL.GLMemory

Parameters:

filter ( GstGL.GLFilter ) –

a GstGL.GLFilter

input ( Gst.Buffer ) –

an input buffer

output ( Gst.Buffer ) –

an output buffer

Returns ( bool ) –

whether the transformation succeeded

Since : 1.4


gst_gl_filter_render_to_target

gboolean
gst_gl_filter_render_to_target (GstGLFilter * filter,
                                GstGLMemory * input,
                                GstGLMemory * output,
                                GstGLFilterRenderFunc func,
                                gpointer data)

Transforms input into output using func on through FBO.

Parameters:

filter

a GstGLFilter

input

the input texture

output

the output texture

func ( [scope call] ) –

the function to transform input into output. called with data

data ( [allow-none] ) –

the data associated with func

Returns

the return value of func

Since : 1.10


GstGL.GLFilter.prototype.render_to_target

function GstGL.GLFilter.prototype.render_to_target(input: GstGL.GLMemory, output: GstGL.GLMemory, func: GstGL.GLFilterRenderFunc, data: Object): {
    // javascript wrapper for 'gst_gl_filter_render_to_target'
}

Transforms input into output using func on through FBO.

Parameters:

filter ( GstGL.GLFilter ) –

a GstGL.GLFilter

input ( GstGL.GLMemory ) –

the input texture

output ( GstGL.GLMemory ) –

the output texture

the function to transform input into output. called with data

data ( Object ) –

the data associated with func

Returns ( Number ) –

the return value of func

Since : 1.10


GstGL.GLFilter.render_to_target

def GstGL.GLFilter.render_to_target (self, input, output, func, *data):
    #python wrapper for 'gst_gl_filter_render_to_target'

Transforms input into output using func on through FBO.

Parameters:

filter ( GstGL.GLFilter ) –

a GstGL.GLFilter

input ( GstGL.GLMemory ) –

the input texture

output ( GstGL.GLMemory ) –

the output texture

the function to transform input into output. called with data

data ( variadic ) –

the data associated with func

Returns ( bool ) –

the return value of func

Since : 1.10


gst_gl_filter_render_to_target_with_shader

gst_gl_filter_render_to_target_with_shader (GstGLFilter * filter,
                                            GstGLMemory * input,
                                            GstGLMemory * output,
                                            GstGLShader * shader)

Transforms input into output using shader with a FBO.

See also: gst_gl_filter_render_to_target

Parameters:

filter

a GstGLFilter

input

the input texture

output

the output texture

shader

the shader to use.

Since : 1.4


GstGL.GLFilter.prototype.render_to_target_with_shader

function GstGL.GLFilter.prototype.render_to_target_with_shader(input: GstGL.GLMemory, output: GstGL.GLMemory, shader: GstGL.GLShader): {
    // javascript wrapper for 'gst_gl_filter_render_to_target_with_shader'
}

Transforms input into output using shader with a FBO.

See also: GstGL.GLFilter.prototype.render_to_target

Parameters:

filter ( GstGL.GLFilter ) –

a GstGL.GLFilter

input ( GstGL.GLMemory ) –

the input texture

output ( GstGL.GLMemory ) –

the output texture

shader ( GstGL.GLShader ) –

the shader to use.

Since : 1.4


GstGL.GLFilter.render_to_target_with_shader

def GstGL.GLFilter.render_to_target_with_shader (self, input, output, shader):
    #python wrapper for 'gst_gl_filter_render_to_target_with_shader'

Transforms input into output using shader with a FBO.

See also: GstGL.GLFilter.render_to_target

Parameters:

filter ( GstGL.GLFilter ) –

a GstGL.GLFilter

input ( GstGL.GLMemory ) –

the input texture

output ( GstGL.GLMemory ) –

the output texture

shader ( GstGL.GLShader ) –

the shader to use.

Since : 1.4


Functions

gst_gl_filter_add_rgba_pad_templates

gst_gl_filter_add_rgba_pad_templates (GstGLFilterClass * klass)

Parameters:

klass
No description available

GstGL.GLFilter.prototype.add_rgba_pad_templates

function GstGL.GLFilter.prototype.add_rgba_pad_templates(klass: GstGL.GLFilterClass): {
    // javascript wrapper for 'gst_gl_filter_add_rgba_pad_templates'
}

Parameters:

klass ( GstGL.GLFilterClass ) –
No description available

GstGL.GLFilter.add_rgba_pad_templates

def GstGL.GLFilter.add_rgba_pad_templates (klass):
    #python wrapper for 'gst_gl_filter_add_rgba_pad_templates'

Parameters:

klass ( GstGL.GLFilterClass ) –
No description available

Virtual Methods

filter

gboolean
filter (GstGLFilter * filter,
        GstBuffer * inbuf,
        GstBuffer * outbuf)

perform operations on the input and output buffers. In general, you should avoid using this method if at all possible. One valid use-case for using this is keeping previous buffers for future calculations. Note: If filter exists, then filter_texture is not run

Parameters:

filter
No description available
inbuf
No description available
outbuf
No description available
Returns
No description available

filter

function filter(filter: GstGL.GLFilter, inbuf: Gst.Buffer, outbuf: Gst.Buffer): {
    // javascript implementation of the 'filter' virtual method
}

perform operations on the input and output buffers. In general, you should avoid using this method if at all possible. One valid use-case for using this is keeping previous buffers for future calculations. Note: If filter exists, then filter_texture is not run

Parameters:

filter ( GstGL.GLFilter ) –
No description available
inbuf ( Gst.Buffer ) –
No description available
outbuf ( Gst.Buffer ) –
No description available
Returns ( Number ) –
No description available

filter

def filter (filter, inbuf, outbuf):
    #python implementation of the 'filter' virtual method

perform operations on the input and output buffers. In general, you should avoid using this method if at all possible. One valid use-case for using this is keeping previous buffers for future calculations. Note: If filter exists, then filter_texture is not run

Parameters:

filter ( GstGL.GLFilter ) –
No description available
inbuf ( Gst.Buffer ) –
No description available
outbuf ( Gst.Buffer ) –
No description available
Returns ( bool ) –
No description available

filter_texture

gboolean
filter_texture (GstGLFilter * filter,
                GstGLMemory * input,
                GstGLMemory * output)

given in_tex, transform it into out_tex. Not used if filter exists

Parameters:

filter
No description available
input
No description available
output
No description available
Returns
No description available

filter_texture

function filter_texture(filter: GstGL.GLFilter, input: GstGL.GLMemory, output: GstGL.GLMemory): {
    // javascript implementation of the 'filter_texture' virtual method
}

given in_tex, transform it into out_tex. Not used if filter exists

Parameters:

filter ( GstGL.GLFilter ) –
No description available
input ( GstGL.GLMemory ) –
No description available
output ( GstGL.GLMemory ) –
No description available
Returns ( Number ) –
No description available

filter_texture

def filter_texture (filter, input, output):
    #python implementation of the 'filter_texture' virtual method

given in_tex, transform it into out_tex. Not used if filter exists

Parameters:

filter ( GstGL.GLFilter ) –
No description available
input ( GstGL.GLMemory ) –
No description available
output ( GstGL.GLMemory ) –
No description available
Returns ( bool ) –
No description available

init_fbo

gboolean
init_fbo (GstGLFilter * filter)

perform initialization when the Framebuffer object is created

Parameters:

filter
No description available
Returns
No description available

init_fbo

function init_fbo(filter: GstGL.GLFilter): {
    // javascript implementation of the 'init_fbo' virtual method
}

perform initialization when the Framebuffer object is created

Parameters:

filter ( GstGL.GLFilter ) –
No description available
Returns ( Number ) –
No description available

init_fbo

def init_fbo (filter):
    #python implementation of the 'init_fbo' virtual method

perform initialization when the Framebuffer object is created

Parameters:

filter ( GstGL.GLFilter ) –
No description available
Returns ( bool ) –
No description available

set_caps

gboolean
set_caps (GstGLFilter * filter,
          GstCaps * incaps,
          GstCaps * outcaps)

mirror from GstBaseTransform

Parameters:

filter
No description available
incaps
No description available
outcaps
No description available
Returns
No description available

set_caps

function set_caps(filter: GstGL.GLFilter, incaps: Gst.Caps, outcaps: Gst.Caps): {
    // javascript implementation of the 'set_caps' virtual method
}

mirror from GstBaseTransform

Parameters:

filter ( GstGL.GLFilter ) –
No description available
incaps ( Gst.Caps ) –
No description available
outcaps ( Gst.Caps ) –
No description available
Returns ( Number ) –
No description available

set_caps

def set_caps (filter, incaps, outcaps):
    #python implementation of the 'set_caps' virtual method

mirror from GstBaseTransform

Parameters:

filter ( GstGL.GLFilter ) –
No description available
incaps ( Gst.Caps ) –
No description available
outcaps ( Gst.Caps ) –
No description available
Returns ( bool ) –
No description available

transform_internal_caps

GstCaps *
transform_internal_caps (GstGLFilter * filter,
                         GstPadDirection direction,
                         GstCaps * caps,
                         GstCaps * filter_caps)

Perform sub-class specific modifications of the caps to be processed between upload on input and before download for output.

Parameters:

filter
No description available
direction
No description available
caps
No description available
filter_caps
No description available
Returns
No description available

transform_internal_caps

function transform_internal_caps(filter: GstGL.GLFilter, direction: Gst.PadDirection, caps: Gst.Caps, filter_caps: Gst.Caps): {
    // javascript implementation of the 'transform_internal_caps' virtual method
}

Perform sub-class specific modifications of the caps to be processed between upload on input and before download for output.

Parameters:

filter ( GstGL.GLFilter ) –
No description available
direction ( Gst.PadDirection ) –
No description available
caps ( Gst.Caps ) –
No description available
filter_caps ( Gst.Caps ) –
No description available
Returns ( Gst.Caps ) –
No description available

transform_internal_caps

def transform_internal_caps (filter, direction, caps, filter_caps):
    #python implementation of the 'transform_internal_caps' virtual method

Perform sub-class specific modifications of the caps to be processed between upload on input and before download for output.

Parameters:

filter ( GstGL.GLFilter ) –
No description available
direction ( Gst.PadDirection ) –
No description available
caps ( Gst.Caps ) –
No description available
filter_caps ( Gst.Caps ) –
No description available
Returns ( Gst.Caps ) –
No description available

Callbacks

GstGLFilterRenderFunc

gboolean
(*GstGLFilterRenderFunc) (GstGLFilter * filter,
                          GstGLMemory * in_tex,
                          gpointer user_data)

Parameters:

filter

the GstGLFilter

in_tex

the input GstGLMemory to render

user_data

user data

Returns

whether the render succeeded

Since : 1.10


GstGL.GLFilterRenderFunc

function GstGL.GLFilterRenderFunc(filter: GstGL.GLFilter, in_tex: GstGL.GLMemory, user_data: Object): {
    // javascript wrapper for 'GstGLFilterRenderFunc'
}

Parameters:

filter ( GstGL.GLFilter ) –

the GstGL.GLFilter

in_tex ( GstGL.GLMemory ) –

the input GstGL.GLMemory to render

user_data ( Object ) –

user data

Returns ( Number ) –

whether the render succeeded

Since : 1.10


GstGL.GLFilterRenderFunc

def GstGL.GLFilterRenderFunc (filter, in_tex, *user_data):
    #python wrapper for 'GstGLFilterRenderFunc'

Parameters:

filter ( GstGL.GLFilter ) –

the GstGL.GLFilter

in_tex ( GstGL.GLMemory ) –

the input GstGL.GLMemory to render

user_data ( variadic ) –

user data

Returns ( bool ) –

whether the render succeeded

Since : 1.10


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