gstreamer/auto/

pipeline.rs

// This file was generated by gir (https://github.com/gtk-rs/gir)
// from gir-files (https://github.com/gtk-rs/gir-files)
// from gst-gir-files (https://gitlab.freedesktop.org/gstreamer/gir-files-rs.git)
// DO NOT EDIT

use crate::{ffi, Bin, ChildProxy, Clock, ClockTime, Element, Object};
use glib::{
    prelude::*,
    signal::{connect_raw, SignalHandlerId},
    translate::*,
};
use std::boxed::Box as Box_;

glib::wrapper! {
    /// A [`Pipeline`][crate::Pipeline] is a special [`Bin`][crate::Bin] used as the toplevel container for
    /// the filter graph. The [`Pipeline`][crate::Pipeline] will manage the selection and
    /// distribution of a global [`Clock`][crate::Clock] as well as provide a [`Bus`][crate::Bus] to the
    /// application.
    ///
    /// [`new()`][Self::new()] is used to create a pipeline. when you are done with
    /// the pipeline, use `gst_object_unref()` to free its resources including all
    /// added [`Element`][crate::Element] objects (if not otherwise referenced).
    ///
    /// Elements are added and removed from the pipeline using the [`Bin`][crate::Bin]
    /// methods like [`GstBinExt::add()`][crate::prelude::GstBinExt::add()] and [`GstBinExt::remove()`][crate::prelude::GstBinExt::remove()] (see [`Bin`][crate::Bin]).
    ///
    /// Before changing the state of the [`Pipeline`][crate::Pipeline] (see [`Element`][crate::Element]) a [`Bus`][crate::Bus]
    /// should be retrieved with `gst_pipeline_get_bus()`. This [`Bus`][crate::Bus] should then
    /// be used to receive [`Message`][crate::Message] from the elements in the pipeline. Listening
    /// to the [`Bus`][crate::Bus] is necessary for retrieving error messages from the
    /// [`Pipeline`][crate::Pipeline] and otherwise the [`Pipeline`][crate::Pipeline] might stop without any
    /// indication, why. Furthermore, the [`Pipeline`][crate::Pipeline] posts messages even if
    /// nobody listens on the [`Bus`][crate::Bus], which will pile up and use up memory.
    ///
    /// By default, a [`Pipeline`][crate::Pipeline] will automatically flush the pending [`Bus`][crate::Bus]
    /// messages when going to the NULL state to ensure that no circular
    /// references exist when no messages are read from the [`Bus`][crate::Bus]. This
    /// behaviour can be changed with [`PipelineExt::set_auto_flush_bus()`][crate::prelude::PipelineExt::set_auto_flush_bus()].
    ///
    /// When the [`Pipeline`][crate::Pipeline] performs the PAUSED to PLAYING state change it will
    /// select a clock for the elements. The clock selection algorithm will by
    /// default select a clock provided by an element that is most upstream
    /// (closest to the source). For live pipelines (ones that return
    /// [`StateChangeReturn::NoPreroll`][crate::StateChangeReturn::NoPreroll] from the [`ElementExt::set_state()`][crate::prelude::ElementExt::set_state()] call) this
    /// will select the clock provided by the live source. For normal pipelines
    /// this will select a clock provided by the sinks (most likely the audio
    /// sink). If no element provides a clock, a default [`SystemClock`][crate::SystemClock] is used.
    ///
    /// The clock selection can be controlled with the [`PipelineExt::use_clock()`][crate::prelude::PipelineExt::use_clock()]
    /// method, which will enforce a given clock on the pipeline. With
    /// [`PipelineExt::auto_clock()`][crate::prelude::PipelineExt::auto_clock()] the default clock selection algorithm can be
    /// restored.
    ///
    /// A [`Pipeline`][crate::Pipeline] maintains a running time for the elements. The running
    /// time is defined as the difference between the current clock time and
    /// the base time. When the pipeline goes to READY or a flushing seek is
    /// performed on it, the running time is reset to 0. When the pipeline is
    /// set from PLAYING to PAUSED, the current clock time is sampled and used to
    /// configure the base time for the elements when the pipeline is set
    /// to PLAYING again. The effect is that the running time (as the difference
    /// between the clock time and the base time) will count how much time was spent
    /// in the PLAYING state. This default behaviour can be changed with the
    /// [`ElementExt::set_start_time()`][crate::prelude::ElementExt::set_start_time()] method.
    ///
    /// ## Properties
    ///
    ///
    /// #### `auto-flush-bus`
    ///  Whether or not to automatically flush all messages on the
    /// pipeline's bus when going from READY to NULL state. Please see
    /// [`PipelineExt::set_auto_flush_bus()`][crate::prelude::PipelineExt::set_auto_flush_bus()] for more information on this option.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `delay`
    ///  The expected delay needed for elements to spin up to the
    /// PLAYING state expressed in nanoseconds.
    /// see [`PipelineExt::set_delay()`][crate::prelude::PipelineExt::set_delay()] for more information on this option.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `latency`
    ///  Latency to configure on the pipeline. See [`PipelineExt::set_latency()`][crate::prelude::PipelineExt::set_latency()].
    ///
    /// Readable | Writeable
    /// <details><summary><h4>Bin</h4></summary>
    ///
    ///
    /// #### `async-handling`
    ///  If set to [`true`], the bin will handle asynchronous state changes.
    /// This should be used only if the bin subclass is modifying the state
    /// of its children on its own.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `message-forward`
    ///  Forward all children messages, even those that would normally be filtered by
    /// the bin. This can be interesting when one wants to be notified of the EOS
    /// state of individual elements, for example.
    ///
    /// The messages are converted to an ELEMENT message with the bin as the
    /// source. The structure of the message is named `GstBinForwarded` and contains
    /// a field named `message` that contains the original forwarded [`Message`][crate::Message].
    ///
    /// Readable | Writeable
    /// </details>
    /// <details><summary><h4>Object</h4></summary>
    ///
    ///
    /// #### `name`
    ///  Readable | Writeable | Construct
    ///
    ///
    /// #### `parent`
    ///  The parent of the object. Please note, that when changing the 'parent'
    /// property, we don't emit [`notify`][struct@crate::glib::Object#notify] and [`deep-notify`][struct@crate::Object#deep-notify]
    /// signals due to locking issues. In some cases one can use
    /// [`element-added`][struct@crate::Bin#element-added] or [`element-removed`][struct@crate::Bin#element-removed] signals on the parent to
    /// achieve a similar effect.
    ///
    /// Readable | Writeable
    /// </details>
    ///
    /// # Implements
    ///
    /// [`PipelineExt`][trait@crate::prelude::PipelineExt], [`GstBinExt`][trait@crate::prelude::GstBinExt], [`ElementExt`][trait@crate::prelude::ElementExt], [`GstObjectExt`][trait@crate::prelude::GstObjectExt], [`trait@glib::ObjectExt`], [`ChildProxyExt`][trait@crate::prelude::ChildProxyExt], [`ElementExtManual`][trait@crate::prelude::ElementExtManual], [`ChildProxyExtManual`][trait@crate::prelude::ChildProxyExtManual]
    #[doc(alias = "GstPipeline")]
    pub struct Pipeline(Object<ffi::GstPipeline, ffi::GstPipelineClass>) @extends Bin, Element, Object, @implements ChildProxy;

    match fn {
        type_ => || ffi::gst_pipeline_get_type(),
    }
}

impl Pipeline {
    pub const NONE: Option<&'static Pipeline> = None;
}

unsafe impl Send for Pipeline {}
unsafe impl Sync for Pipeline {}

mod sealed {
    pub trait Sealed {}
    impl<T: super::IsA<super::Pipeline>> Sealed for T {}
}

/// Trait containing all [`struct@Pipeline`] methods.
///
/// # Implementors
///
/// [`Pipeline`][struct@crate::Pipeline]
pub trait PipelineExt: IsA<Pipeline> + sealed::Sealed + 'static {
    /// Let `self` select a clock automatically. This is the default
    /// behaviour.
    ///
    /// Use this function if you previous forced a fixed clock with
    /// [`use_clock()`][Self::use_clock()] and want to restore the default
    /// pipeline clock selection algorithm.
    ///
    /// MT safe.
    #[doc(alias = "gst_pipeline_auto_clock")]
    fn auto_clock(&self) {
        unsafe {
            ffi::gst_pipeline_auto_clock(self.as_ref().to_glib_none().0);
        }
    }

    /// Check if `self` will automatically flush messages when going to
    /// the NULL state.
    ///
    /// # Returns
    ///
    /// whether the pipeline will automatically flush its bus when
    /// going from READY to NULL state or not.
    ///
    /// MT safe.
    #[doc(alias = "gst_pipeline_get_auto_flush_bus")]
    #[doc(alias = "get_auto_flush_bus")]
    #[doc(alias = "auto-flush-bus")]
    fn is_auto_flush_bus(&self) -> bool {
        unsafe {
            from_glib(ffi::gst_pipeline_get_auto_flush_bus(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    /// Return the configured latency on `self`.
    ///
    /// # Returns
    ///
    /// `self` configured latency, or `GST_CLOCK_TIME_NONE` if none has been configured
    /// because `self` did not reach the PLAYING state yet.
    ///
    /// MT safe.
    #[cfg(feature = "v1_24")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v1_24")))]
    #[doc(alias = "gst_pipeline_get_configured_latency")]
    #[doc(alias = "get_configured_latency")]
    fn configured_latency(&self) -> Option<ClockTime> {
        unsafe {
            from_glib(ffi::gst_pipeline_get_configured_latency(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    /// Get the configured delay (see [`set_delay()`][Self::set_delay()]).
    ///
    /// # Returns
    ///
    /// The configured delay.
    ///
    /// MT safe.
    #[doc(alias = "gst_pipeline_get_delay")]
    #[doc(alias = "get_delay")]
    fn delay(&self) -> ClockTime {
        unsafe {
            try_from_glib(ffi::gst_pipeline_get_delay(self.as_ref().to_glib_none().0))
                .expect("mandatory glib value is None")
        }
    }

    /// Gets the latency that should be configured on the pipeline. See
    /// [`set_latency()`][Self::set_latency()].
    ///
    /// # Returns
    ///
    /// Latency to configure on the pipeline or GST_CLOCK_TIME_NONE
    #[doc(alias = "gst_pipeline_get_latency")]
    #[doc(alias = "get_latency")]
    fn latency(&self) -> Option<ClockTime> {
        unsafe {
            from_glib(ffi::gst_pipeline_get_latency(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    /// Gets the current clock used by `self`.
    ///
    /// Unlike [`ElementExt::clock()`][crate::prelude::ElementExt::clock()], this function will always return a
    /// clock, even if the pipeline is not in the PLAYING state.
    ///
    /// # Returns
    ///
    /// a [`Clock`][crate::Clock], unref after usage.
    #[doc(alias = "gst_pipeline_get_pipeline_clock")]
    #[doc(alias = "get_pipeline_clock")]
    fn pipeline_clock(&self) -> Clock {
        unsafe {
            from_glib_full(ffi::gst_pipeline_get_pipeline_clock(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    /// Check if `self` is live.
    ///
    /// # Returns
    ///
    /// [`true`] if `self` is live, [`false`] if not or if it did not reach the PAUSED state yet.
    ///
    /// MT safe.
    #[cfg(feature = "v1_24")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v1_24")))]
    #[doc(alias = "gst_pipeline_is_live")]
    fn is_live(&self) -> bool {
        unsafe { from_glib(ffi::gst_pipeline_is_live(self.as_ref().to_glib_none().0)) }
    }

    /// Usually, when a pipeline goes from READY to NULL state, it automatically
    /// flushes all pending messages on the bus, which is done for refcounting
    /// purposes, to break circular references.
    ///
    /// This means that applications that update state using (async) bus messages
    /// (e.g. do certain things when a pipeline goes from PAUSED to READY) might
    /// not get to see messages when the pipeline is shut down, because they might
    /// be flushed before they can be dispatched in the main thread. This behaviour
    /// can be disabled using this function.
    ///
    /// It is important that all messages on the bus are handled when the
    /// automatic flushing is disabled else memory leaks will be introduced.
    ///
    /// MT safe.
    /// ## `auto_flush`
    /// whether or not to automatically flush the bus when
    /// the pipeline goes from READY to NULL state
    #[doc(alias = "gst_pipeline_set_auto_flush_bus")]
    #[doc(alias = "auto-flush-bus")]
    fn set_auto_flush_bus(&self, auto_flush: bool) {
        unsafe {
            ffi::gst_pipeline_set_auto_flush_bus(
                self.as_ref().to_glib_none().0,
                auto_flush.into_glib(),
            );
        }
    }

    /// Set the expected delay needed for all elements to perform the
    /// PAUSED to PLAYING state change. `delay` will be added to the
    /// base time of the elements so that they wait an additional `delay`
    /// amount of time before starting to process buffers and cannot be
    /// `GST_CLOCK_TIME_NONE`.
    ///
    /// This option is used for tuning purposes and should normally not be
    /// used.
    ///
    /// MT safe.
    /// ## `delay`
    /// the delay
    #[doc(alias = "gst_pipeline_set_delay")]
    #[doc(alias = "delay")]
    fn set_delay(&self, delay: ClockTime) {
        unsafe {
            ffi::gst_pipeline_set_delay(self.as_ref().to_glib_none().0, delay.into_glib());
        }
    }

    /// Sets the latency that should be configured on the pipeline. Setting
    /// GST_CLOCK_TIME_NONE will restore the default behaviour of using the minimum
    /// latency from the LATENCY query. Setting this is usually not required and
    /// the pipeline will figure out an appropriate latency automatically.
    ///
    /// Setting a too low latency, especially lower than the minimum latency from
    /// the LATENCY query, will most likely cause the pipeline to fail.
    /// ## `latency`
    /// latency to configure
    #[doc(alias = "gst_pipeline_set_latency")]
    #[doc(alias = "latency")]
    fn set_latency(&self, latency: impl Into<Option<ClockTime>>) {
        unsafe {
            ffi::gst_pipeline_set_latency(
                self.as_ref().to_glib_none().0,
                latency.into().into_glib(),
            );
        }
    }

    /// Force `self` to use the given `clock`. The pipeline will
    /// always use the given clock even if new clock providers are added
    /// to this pipeline.
    ///
    /// If `clock` is [`None`] all clocking will be disabled which will make
    /// the pipeline run as fast as possible.
    ///
    /// MT safe.
    /// ## `clock`
    /// the clock to use
    #[doc(alias = "gst_pipeline_use_clock")]
    fn use_clock(&self, clock: Option<&impl IsA<Clock>>) {
        unsafe {
            ffi::gst_pipeline_use_clock(
                self.as_ref().to_glib_none().0,
                clock.map(|p| p.as_ref()).to_glib_none().0,
            );
        }
    }

    #[doc(alias = "auto-flush-bus")]
    fn connect_auto_flush_bus_notify<F: Fn(&Self) + Send + Sync + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn notify_auto_flush_bus_trampoline<
            P: IsA<Pipeline>,
            F: Fn(&P) + Send + Sync + 'static,
        >(
            this: *mut ffi::GstPipeline,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(Pipeline::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::auto-flush-bus\0".as_ptr() as *const _,
                Some(std::mem::transmute::<*const (), unsafe extern "C" fn()>(
                    notify_auto_flush_bus_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "delay")]
    fn connect_delay_notify<F: Fn(&Self) + Send + Sync + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_delay_trampoline<
            P: IsA<Pipeline>,
            F: Fn(&P) + Send + Sync + 'static,
        >(
            this: *mut ffi::GstPipeline,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(Pipeline::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::delay\0".as_ptr() as *const _,
                Some(std::mem::transmute::<*const (), unsafe extern "C" fn()>(
                    notify_delay_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "latency")]
    fn connect_latency_notify<F: Fn(&Self) + Send + Sync + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn notify_latency_trampoline<
            P: IsA<Pipeline>,
            F: Fn(&P) + Send + Sync + 'static,
        >(
            this: *mut ffi::GstPipeline,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(Pipeline::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::latency\0".as_ptr() as *const _,
                Some(std::mem::transmute::<*const (), unsafe extern "C" fn()>(
                    notify_latency_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }
}

impl<O: IsA<Pipeline>> PipelineExt for O {}