// This file was generated by gir (https://github.com/gtk-rs/gir)
// from gir-files (https://github.com/gtk-rs/gir-files)
// DO NOT EDIT

use glib::object::Cast;
use glib::object::IsA;
use glib::signal::connect_raw;
use glib::signal::SignalHandlerId;
use glib::translate::*;
use glib_sys;
use gst_audio_sys;
use std::boxed::Box as Box_;
use std::mem::transmute;
use StreamVolumeFormat;

glib_wrapper! {
    /// This interface is implemented by elements that provide a stream volume. Examples for
    /// such elements are `volume` and `playbin`.
    ///
    /// Applications can use this interface to get or set the current stream volume. For this
    /// the "volume" `gobject::Object` property can be used or the helper functions `StreamVolume::set_volume`
    /// and `StreamVolume::get_volume`. This volume is always a linear factor, i.e. 0.0 is muted
    /// 1.0 is 100%. For showing the volume in a GUI it might make sense to convert it to
    /// a different format by using `StreamVolume::convert_volume`. Volume sliders should usually
    /// use a cubic volume.
    ///
    /// Separate from the volume the stream can also be muted by the "mute" `gobject::Object` property or
    /// `StreamVolume::set_mute` and `StreamVolume::get_mute`.
    ///
    /// Elements that provide some kind of stream volume should implement the "volume" and
    /// "mute" `gobject::Object` properties and handle setting and getting of them properly.
    /// The volume property is defined to be a linear volume factor.
    ///
    /// # Implements
    ///
    /// [`StreamVolumeExt`](trait.StreamVolumeExt.html)
    pub struct StreamVolume(Interface<gst_audio_sys::GstStreamVolume>);

    match fn {
        get_type => || gst_audio_sys::gst_stream_volume_get_type(),
    }
}

impl StreamVolume {
    /// ## `from`
    /// `StreamVolumeFormat` to convert from
    /// ## `to`
    /// `StreamVolumeFormat` to convert to
    /// ## `val`
    /// Volume in `from` format that should be converted
    ///
    /// # Returns
    ///
    /// the converted volume
    pub fn convert_volume(from: StreamVolumeFormat, to: StreamVolumeFormat, val: f64) -> f64 {
        assert_initialized_main_thread!();
        unsafe {
            gst_audio_sys::gst_stream_volume_convert_volume(from.to_glib(), to.to_glib(), val)
        }
    }
}

unsafe impl Send for StreamVolume {}
unsafe impl Sync for StreamVolume {}

pub const NONE_STREAM_VOLUME: Option<&StreamVolume> = None;

/// Trait containing all `StreamVolume` methods.
///
/// # Implementors
///
/// [`StreamVolume`](struct.StreamVolume.html)
pub trait StreamVolumeExt: 'static {
    ///
    /// # Returns
    ///
    /// Returns `true` if the stream is muted
    fn get_mute(&self) -> bool;

    /// ## `format`
    /// `StreamVolumeFormat` which should be returned
    ///
    /// # Returns
    ///
    /// The current stream volume as linear factor
    fn get_volume(&self, format: StreamVolumeFormat) -> f64;

    /// ## `mute`
    /// Mute state that should be set
    fn set_mute(&self, mute: bool);

    /// ## `format`
    /// `StreamVolumeFormat` of `val`
    /// ## `val`
    /// Linear volume factor that should be set
    fn set_volume(&self, format: StreamVolumeFormat, val: f64);

    fn connect_property_mute_notify<F: Fn(&Self) + Send + Sync + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId;

    fn connect_property_volume_notify<F: Fn(&Self) + Send + Sync + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId;
}

impl<O: IsA<StreamVolume>> StreamVolumeExt for O {
    fn get_mute(&self) -> bool {
        unsafe {
            from_glib(gst_audio_sys::gst_stream_volume_get_mute(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    fn get_volume(&self, format: StreamVolumeFormat) -> f64 {
        unsafe {
            gst_audio_sys::gst_stream_volume_get_volume(
                self.as_ref().to_glib_none().0,
                format.to_glib(),
            )
        }
    }

    fn set_mute(&self, mute: bool) {
        unsafe {
            gst_audio_sys::gst_stream_volume_set_mute(
                self.as_ref().to_glib_none().0,
                mute.to_glib(),
            );
        }
    }

    fn set_volume(&self, format: StreamVolumeFormat, val: f64) {
        unsafe {
            gst_audio_sys::gst_stream_volume_set_volume(
                self.as_ref().to_glib_none().0,
                format.to_glib(),
                val,
            );
        }
    }

    fn connect_property_mute_notify<F: Fn(&Self) + Send + Sync + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn notify_mute_trampoline<P, F: Fn(&P) + Send + Sync + 'static>(
            this: *mut gst_audio_sys::GstStreamVolume,
            _param_spec: glib_sys::gpointer,
            f: glib_sys::gpointer,
        ) where
            P: IsA<StreamVolume>,
        {
            let f: &F = &*(f as *const F);
            f(&StreamVolume::from_glib_borrow(this).unsafe_cast())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::mute\0".as_ptr() as *const _,
                Some(transmute(notify_mute_trampoline::<Self, F> as usize)),
                Box_::into_raw(f),
            )
        }
    }

    fn connect_property_volume_notify<F: Fn(&Self) + Send + Sync + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn notify_volume_trampoline<P, F: Fn(&P) + Send + Sync + 'static>(
            this: *mut gst_audio_sys::GstStreamVolume,
            _param_spec: glib_sys::gpointer,
            f: glib_sys::gpointer,
        ) where
            P: IsA<StreamVolume>,
        {
            let f: &F = &*(f as *const F);
            f(&StreamVolume::from_glib_borrow(this).unsafe_cast())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::volume\0".as_ptr() as *const _,
                Some(transmute(notify_volume_trampoline::<Self, F> as usize)),
                Box_::into_raw(f),
            )
        }
    }
}