the image writer chooses a specific writer automatically based on the extension of the given file name More...

#include <video_writer.h>

Inheritance diagram for cgv::media::video::video_writer:

Public Member Functions
	video_writer (const std::string &file_extension)
	construct a video writer from a file extension and choose an implementation based on the extension

const std::string &	get_last_error () const
	return a reference to the last error message

std::string	get_type_name () const
	returns the type name of the chosen video writer implementation

bool	scan_codecs (std::vector< std::string > &codec_names) const
	return a list of supported codecs in text format

bool	set_codec (const std::string &codec_name)
	select a specific codec. This will chance the properties available with the property interface.

std::string	get_codec () const
	return the currently selected codec

std::string	get_property_declarations ()
	return a semicolon separated list of property declarations of the form "name:type", by default an empty list is returned More...

bool	open (const std::string &file_name, const cgv::data::data_format &image_format, float fps=25, bool interactive=false)

bool	write_frame (const cgv::data::const_data_view &image_data)

bool	close ()
	close the video file

virtual std::string	get_default_options () const
	overload to provide default options for registration

virtual void	on_register ()
	overload to handle register events that is sent after the instance has been registered More...

virtual void	unregister ()
	overload to handle unregistration of instances

virtual void	stream_stats (std::ostream &)
	overload to show the content of this object

virtual data::ref_ptr< named, true >	get_named ()
	cast upward to named

virtual data::ref_ptr< node, true >	get_node ()
	cast upward to node

virtual data::ref_ptr< group, true >	get_group ()
	cast upward to group

template<class T >
data::ref_ptr< T, true >	cast ()
	cast to arbitrary class, but use the casts to named, node and group from the interface

template<class T >
T *	get_interface ()
	use dynamic type cast to check for the given interface

template<class T >
const T *	get_const_interface () const
	use dynamic type cast to check for the given interface

virtual void	update ()
	this virtual update allows for example to ask a view to update the viewed value. The default implementation is empty.

virtual void *	get_user_data () const
	this virtual method allows to pass application specific data for internal purposes More...

int	get_ref_count () const
	read access to current count

Static Public Member Functions
static const std::string &	get_supported_extensions (char sep=';')

static std::string	construct_filter_string ()
	use this to generate a file_open_dialog or file_save_dialog

Protected Member Functions
bool	set_void (const std::string &property, const std::string &type, const void *value)
	abstract interface for the setter, uses the interface of the selected writer implementation More...

bool	get_void (const std::string &property, const std::string &type, void *value)
	abstract interface for the getter, uses the interface of the selected writer implementation More...

void	set_ref_count (int c) const
	write access is also const to allow ref counted pointers to const instances

Static Protected Member Functions
template<class T >
static data::ref_ptr< T, true >	cast_dynamic (base *b)
	use dynamic cast for upcast to given class

Protected Attributes
abst_video_writer *	wr
	store a pointer to the chosen reader

std::string	last_error
	store the last error not resulting from video writer implementations

property interface
virtual bool	self_reflect (cgv::reflect::reflection_handler &)
	used for simple self reflection More...

virtual void	on_set (void *member_ptr)
	this callback is called when the set_void method has changed a member and can be overloaded in derived class

virtual bool	call_void (const std::string &method, const std::vector< std::string > &param_value_types, const std::vector< const void * > &param_value_ptrs, const std::string &result_type="", void *result_value_ptr=0)
	abstract interface to call an action More...

void	set (const std::string &property, const char *value)
	specialization of set method to support const char* as strings

template<typename T >
void	set (const std::string &property, const T &value)
	set a property of the element to the given value and perform standard conversions if necessary. More...

template<typename T >
T	get (const std::string &property)
	query a property of the element and perform standard conversions if necessary. More...

void	multi_set (const std::string &property_assignments, bool report_error=true)
	set several properties More...

bool	is_property (const std::string &property_name, std::string *type_name=0)
	check if the given name specifies a property. More...

void *	find_member_ptr (const std::string &property_name, std::string *type_name=0)
	find a member pointer by name. More...

Detailed Description

the image writer chooses a specific writer automatically based on the extension of the given file name

Member Function Documentation

◆ call_void()

bool cgv::base::base::call_void	(	const std::string &	method,
		const std::vector< std::string > &	param_value_types,
		const std::vector< const void * > &	param_value_ptrs,
		const std::string &	result_type = `""`,
		void *	result_value_ptr = `0`
	)

virtualinherited

abstract interface to call an action

overload to implement the execution of a method based on the method name and the given parameters

, i.e. a class method based on the action name and the given parameters. The default implementation uses the self_reflect() method to dispatch this call. If not found, the get_void method returns false.

◆ find_member_ptr()

void * cgv::base::base::find_member_ptr	(	const std::string &	property_name,
		std::string *	type_name = `0`
	)

inherited

find a member pointer by name.

If not found the null pointer is returned. If the type name string pointer is provided, the type of the property is copied to the referenced string.

◆ get()

template<typename T >

T cgv::base::base::get ( const std::string & property )

inlineinherited

query a property of the element and perform standard conversions if necessary.

This templated version simply extracts the type of the value from the reference and calls the set_void() method. Note that this only works if the template cgv::type::info::type_name<T> is overloaded for the value type.

◆ get_property_declarations()

std::string cgv::media::video::video_writer::get_property_declarations ( )

virtual

return a semicolon separated list of property declarations of the form "name:type", by default an empty list is returned

return a semicolon separated list of property declarations supported by the selected codec. Each property declaration is of the form "name:type", where type is in correcpondence with the cgv::type::info::type_name.

Reimplemented from cgv::base::base.

◆ get_supported_extensions()

const std::string & cgv::media::video::video_writer::get_supported_extensions ( char sep = ';' )

static

return a string with a list of supported extensions, where the list entries are separated with the passed character that defaults to a semicolon

◆ get_user_data()

void * cgv::base::base::get_user_data ( ) const

virtualinherited

this virtual method allows to pass application specific data for internal purposes

this virtual method allows derived classes to pass application specific data

◆ get_void()

bool cgv::media::video::video_writer::get_void	(	const std::string &	property,
		const std::string &	type,
		void *	value
	)

protectedvirtual

abstract interface for the getter, uses the interface of the selected writer implementation

abstract interface for the getter, by default it simply returns false

Reimplemented from cgv::base::base.

◆ is_property()

bool cgv::base::base::is_property	(	const std::string &	property_name,
		std::string *	type_name = `0`
	)

inherited

check if the given name specifies a property.

If the type name string pointer is provided, the type of the property is copied to the referenced string.

◆ multi_set()

void cgv::base::base::multi_set	(	const std::string &	property_assignments,
		bool	report_error = `true`
	)

inherited

set several properties

set several properties, which are defined as colon separated assignments, where the types are derived automatically

, which are defined as colon separated assignments, where the types are derived automatically to bool, int, double or std::string.

◆ on_register()

void cgv::base::base::on_register ( )

virtualinherited

overload to handle register events that is sent after the instance has been registered

overload to return a type info structure. By default an empty pointer is returned.

◆ open()

bool cgv::media::video::video_writer::open	(	const std::string &	file_name,
		const cgv::data::data_format &	image_format,
		float	fps = `25`,
		bool	interactive = `false`
	)

open a video file for writing images in the given format with the given fps. Use the currently selected codec and codec properties as set with the property interface.

◆ self_reflect()

bool cgv::base::base::self_reflect ( cgv::reflect::reflection_handler & )

virtualinherited

used for simple self reflection

is used by default implementation of set_void, get_void and get_property_declarations

The overloaded implementation is used by the default implementations of set_void, get_void and get_property_declarations with corresponding reflection handlers. The default implementation of self_reflect is empty.

Reimplemented in cgv::render::render_config, and cgv::render::shader_config.

◆ set()

template<typename T >

void cgv::base::base::set	(	const std::string &	property,
		const T &	value
	)

inlineinherited

set a property of the element to the given value and perform standard conversions if necessary.

This templated version simply extracts the type of the value from the reference and calls the set_void() method. Note that this only works if the template cgv::type::info::type_name<T> is overloaded for the value type.

◆ set_void()

bool cgv::media::video::video_writer::set_void	(	const std::string &	property,
		const std::string &	type,
		const void *	value
	)

protectedvirtual

abstract interface for the setter, uses the interface of the selected writer implementation

abstract interface for the setter, by default it simply returns false

Reimplemented from cgv::base::base.

◆ write_frame()

bool cgv::media::video::video_writer::write_frame ( const cgv::data::const_data_view & image_data )

write the image data stored in the data view as next video frame to the previously opened video file. Return whether this was successful.

The documentation for this class was generated from the following files:

D:/develop/projects/git/cgv/cgv/media/video/video_writer.h
D:/develop/projects/git/cgv/cgv/media/video/video_writer.cxx

Public Member Functions

Static Public Member Functions

Protected Member Functions

Static Protected Member Functions

Protected Attributes

property interface

Detailed Description

Member Function Documentation

◆ call_void()

◆ find_member_ptr()

◆ get()

◆ get_property_declarations()

◆ get_supported_extensions()

◆ get_user_data()

◆ get_void()

◆ is_property()

◆ multi_set()

◆ on_register()

◆ open()

◆ self_reflect()

◆ set()

◆ set_void()

◆ write_frame()