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// 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::Element;
use crate::Object;
use crate::TagList;
use crate::TagMergeMode;
use glib::object::IsA;
use glib::translate::*;

glib::wrapper! {
    /// Element interface that allows setting of media metadata.
    ///
    /// Elements that support changing a stream's metadata will implement this
    /// interface. Examples of such elements are 'vorbisenc', 'theoraenc' and
    /// 'id3v2mux'.
    ///
    /// If you just want to retrieve metadata in your application then all you
    /// need to do is watch for tag messages on your pipeline's bus. This
    /// interface is only for setting metadata, not for extracting it. To set tags
    /// from the application, find tagsetter elements and set tags using e.g.
    /// [`TagSetterExt::merge_tags()`][crate::prelude::TagSetterExt::merge_tags()] or `gst_tag_setter_add_tags()`. Also consider
    /// setting the [`TagMergeMode`][crate::TagMergeMode] that is used for tag events that arrive at the
    /// tagsetter element (default mode is to keep existing tags).
    /// The application should do that before the element goes to [`State::Paused`][crate::State::Paused].
    ///
    /// Elements implementing the [`TagSetter`][crate::TagSetter] interface often have to merge
    /// any tags received from upstream and the tags set by the application via
    /// the interface. This can be done like this:
    ///
    ///
    /// ```C
    /// GstTagMergeMode merge_mode;
    /// const GstTagList *application_tags;
    /// const GstTagList *event_tags;
    /// GstTagSetter *tagsetter;
    /// GstTagList *result;
    ///
    /// tagsetter = GST_TAG_SETTER (element);
    ///
    /// merge_mode = gst_tag_setter_get_tag_merge_mode (tagsetter);
    /// application_tags = gst_tag_setter_get_tag_list (tagsetter);
    /// event_tags = (const GstTagList *) element->event_tags;
    ///
    /// GST_LOG_OBJECT (tagsetter, "merging tags, merge mode = %d", merge_mode);
    /// GST_LOG_OBJECT (tagsetter, "event tags: %" GST_PTR_FORMAT, event_tags);
    /// GST_LOG_OBJECT (tagsetter, "set   tags: %" GST_PTR_FORMAT, application_tags);
    ///
    /// result = gst_tag_list_merge (application_tags, event_tags, merge_mode);
    ///
    /// GST_LOG_OBJECT (tagsetter, "final tags: %" GST_PTR_FORMAT, result);
    /// ```
    ///
    /// # Implements
    ///
    /// [`TagSetterExt`][trait@crate::prelude::TagSetterExt], [`ElementExt`][trait@crate::prelude::ElementExt], [`GstObjectExt`][trait@crate::prelude::GstObjectExt], [`trait@glib::ObjectExt`], [`TagSetterExtManual`][trait@crate::prelude::TagSetterExtManual], [`ElementExtManual`][trait@crate::prelude::ElementExtManual]
    #[doc(alias = "GstTagSetter")]
    pub struct TagSetter(Interface<ffi::GstTagSetter, ffi::GstTagSetterInterface>) @requires Element, Object;

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

unsafe impl Send for TagSetter {}
unsafe impl Sync for TagSetter {}

pub const NONE_TAG_SETTER: Option<&TagSetter> = None;

/// Trait containing all [`struct@TagSetter`] methods.
///
/// # Implementors
///
/// [`TagSetter`][struct@crate::TagSetter]
pub trait TagSetterExt: 'static {
    //#[doc(alias = "gst_tag_setter_add_tag_valist")]
    //fn add_tag_valist(&self, mode: TagMergeMode, tag: &str, var_args: /*Unknown conversion*//*Unimplemented*/Unsupported);

    //#[doc(alias = "gst_tag_setter_add_tag_valist_values")]
    //fn add_tag_valist_values(&self, mode: TagMergeMode, tag: &str, var_args: /*Unknown conversion*//*Unimplemented*/Unsupported);

    //#[doc(alias = "gst_tag_setter_add_tag_values")]
    //fn add_tag_values(&self, mode: TagMergeMode, tag: &str, : /*Unknown conversion*//*Unimplemented*/Fundamental: VarArgs);

    /// Returns the current list of tags the setter uses. The list should not be
    /// modified or freed.
    ///
    /// This function is not thread-safe.
    ///
    /// # Returns
    ///
    /// a current snapshot of the
    ///  taglist used in the setter or [`None`] if none is used.
    #[doc(alias = "gst_tag_setter_get_tag_list")]
    #[doc(alias = "get_tag_list")]
    fn tag_list(&self) -> Option<TagList>;

    /// Queries the mode by which tags inside the setter are overwritten by tags
    /// from events
    ///
    /// # Returns
    ///
    /// the merge mode used inside the element.
    #[doc(alias = "gst_tag_setter_get_tag_merge_mode")]
    #[doc(alias = "get_tag_merge_mode")]
    fn tag_merge_mode(&self) -> TagMergeMode;

    /// Merges the given list into the setter's list using the given mode.
    /// ## `list`
    /// a tag list to merge from
    /// ## `mode`
    /// the mode to merge with
    #[doc(alias = "gst_tag_setter_merge_tags")]
    fn merge_tags(&self, list: &TagList, mode: TagMergeMode);

    /// Reset the internal taglist. Elements should call this from within the
    /// state-change handler.
    #[doc(alias = "gst_tag_setter_reset_tags")]
    fn reset_tags(&self);

    /// Sets the given merge mode that is used for adding tags from events to tags
    /// specified by this interface. The default is [`TagMergeMode::Keep`][crate::TagMergeMode::Keep], which keeps
    /// the tags set with this interface and discards tags from events.
    /// ## `mode`
    /// The mode with which tags are added
    #[doc(alias = "gst_tag_setter_set_tag_merge_mode")]
    fn set_tag_merge_mode(&self, mode: TagMergeMode);
}

impl<O: IsA<TagSetter>> TagSetterExt for O {
    //fn add_tag_valist(&self, mode: TagMergeMode, tag: &str, var_args: /*Unknown conversion*//*Unimplemented*/Unsupported) {
    //    unsafe { TODO: call ffi:gst_tag_setter_add_tag_valist() }
    //}

    //fn add_tag_valist_values(&self, mode: TagMergeMode, tag: &str, var_args: /*Unknown conversion*//*Unimplemented*/Unsupported) {
    //    unsafe { TODO: call ffi:gst_tag_setter_add_tag_valist_values() }
    //}

    //fn add_tag_values(&self, mode: TagMergeMode, tag: &str, : /*Unknown conversion*//*Unimplemented*/Fundamental: VarArgs) {
    //    unsafe { TODO: call ffi:gst_tag_setter_add_tag_values() }
    //}

    fn tag_list(&self) -> Option<TagList> {
        unsafe {
            from_glib_none(ffi::gst_tag_setter_get_tag_list(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    fn tag_merge_mode(&self) -> TagMergeMode {
        unsafe {
            from_glib(ffi::gst_tag_setter_get_tag_merge_mode(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    fn merge_tags(&self, list: &TagList, mode: TagMergeMode) {
        unsafe {
            ffi::gst_tag_setter_merge_tags(
                self.as_ref().to_glib_none().0,
                list.to_glib_none().0,
                mode.into_glib(),
            );
        }
    }

    fn reset_tags(&self) {
        unsafe {
            ffi::gst_tag_setter_reset_tags(self.as_ref().to_glib_none().0);
        }
    }

    fn set_tag_merge_mode(&self, mode: TagMergeMode) {
        unsafe {
            ffi::gst_tag_setter_set_tag_merge_mode(
                self.as_ref().to_glib_none().0,
                mode.into_glib(),
            );
        }
    }
}