Struct mlt_sys::mlt_service_s

#[repr(C)]
pub struct mlt_service_s {
    pub parent: mlt_properties_s,
    pub get_frame: Option<unsafe extern "C" fn(self_: mlt_service, frame: mlt_frame_ptr, index: c_int) -> c_int>,
    pub close: mlt_destructor,
    pub close_object: *mut c_void,
    pub local: *mut c_void,
    pub child: *mut c_void,
}

\brief Service abstract base class

\extends mlt_properties The service is the base class for all of the interesting classes and plugins for MLT. A service can have multiple inputs connections to other services called its "producers" but only a single output to another service called its "consumer." A service that has both producer and consumer connections is called a filter. Any service can have zero or more filters "attached" to it. We call any collection of services and their connections a "service network," which is similar to what DirectShow calls a filter graph or what gstreamer calls an element pipeline.

\event \em service-changed a filter was attached or detached or a transition was connected or disconnected \event \em property-changed \properties \em mlt_type identifies the subclass \properties \em _mlt_service_hidden a flag that indicates whether to hide the mlt_service \properties \em mlt_service is the name of the implementation of the service \properties \em resource is either the stream identifier or grandchild-class \properties \em in when to start, what is started is service-specific \properties \em out when to stop \properties \em _filter_private Set this on a service to ensure that attached filters are handled privately. See modules/core/filter_region.c and modules/core/filter_watermark.c for examples. \properties \em _profile stores the mlt_profile for a service \properties \em _unique_id is a unique identifier \properties \em _need_previous_next boolean that instructs producers to get preceding and following frames inside of \p mlt_service_get_frame

Fields

parent: mlt_properties_s

< \private A service extends properties.

get_frame: Option<unsafe extern "C" fn(self_: mlt_service, frame: mlt_frame_ptr, index: c_int) -> c_int>

Get a frame of data (virtual function).

\param mlt_producer a producer \param mlt_frame_ptr a frame pointer by reference \param int an index \return true if there was an error

close: mlt_destructor

the destructor virtual function

close_object: *mut c_void

< the object supplied to the close virtual function

local: *mut c_void

< \private instance object

child: *mut c_void

< \private the object of a subclass

Trait Implementations

impl Debug for mlt_service_s

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Copy for mlt_service_s

impl Clone for mlt_service_s

fn clone(&self) -> mlt_service_s

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.