// 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::EventTypeFlags;
use glib::error::ErrorDomain;
use glib::translate::*;
use glib::value::FromValue;
use glib::value::ToValue;
use glib::Quark;
use glib::StaticType;
use glib::Type;
use std::ffi::CStr;
use std::fmt;

/// The different types of buffering methods.
#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstBufferingMode")]
pub enum BufferingMode {
    /// a small amount of data is buffered
    #[doc(alias = "GST_BUFFERING_STREAM")]
    Stream,
    /// the stream is being downloaded
    #[doc(alias = "GST_BUFFERING_DOWNLOAD")]
    Download,
    /// the stream is being downloaded in a ringbuffer
    #[doc(alias = "GST_BUFFERING_TIMESHIFT")]
    Timeshift,
    /// the stream is a live stream
    #[doc(alias = "GST_BUFFERING_LIVE")]
    Live,
    #[doc(hidden)]
    __Unknown(i32),
}

#[doc(hidden)]
impl IntoGlib for BufferingMode {
    type GlibType = ffi::GstBufferingMode;

    fn into_glib(self) -> ffi::GstBufferingMode {
        match self {
            Self::Stream => ffi::GST_BUFFERING_STREAM,
            Self::Download => ffi::GST_BUFFERING_DOWNLOAD,
            Self::Timeshift => ffi::GST_BUFFERING_TIMESHIFT,
            Self::Live => ffi::GST_BUFFERING_LIVE,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstBufferingMode> for BufferingMode {
    unsafe fn from_glib(value: ffi::GstBufferingMode) -> Self {
        skip_assert_initialized!();
        match value {
            0 => Self::Stream,
            1 => Self::Download,
            2 => Self::Timeshift,
            3 => Self::Live,
            value => Self::__Unknown(value),
        }
    }
}

impl StaticType for BufferingMode {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_buffering_mode_get_type()) }
    }
}

impl glib::value::ValueType for BufferingMode {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for BufferingMode {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for BufferingMode {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// The result values for a GstBusSyncHandler.
#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstBusSyncReply")]
pub enum BusSyncReply {
    /// drop the message
    #[doc(alias = "GST_BUS_DROP")]
    Drop,
    /// pass the message to the async queue
    #[doc(alias = "GST_BUS_PASS")]
    Pass,
    /// pass message to async queue, continue if message is handled
    #[doc(alias = "GST_BUS_ASYNC")]
    Async,
    #[doc(hidden)]
    __Unknown(i32),
}

#[doc(hidden)]
impl IntoGlib for BusSyncReply {
    type GlibType = ffi::GstBusSyncReply;

    fn into_glib(self) -> ffi::GstBusSyncReply {
        match self {
            Self::Drop => ffi::GST_BUS_DROP,
            Self::Pass => ffi::GST_BUS_PASS,
            Self::Async => ffi::GST_BUS_ASYNC,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstBusSyncReply> for BusSyncReply {
    unsafe fn from_glib(value: ffi::GstBusSyncReply) -> Self {
        skip_assert_initialized!();
        match value {
            0 => Self::Drop,
            1 => Self::Pass,
            2 => Self::Async,
            value => Self::__Unknown(value),
        }
    }
}

impl StaticType for BusSyncReply {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_bus_sync_reply_get_type()) }
    }
}

impl glib::value::ValueType for BusSyncReply {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for BusSyncReply {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for BusSyncReply {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// Modes of caps intersection
///
/// [`Self::ZigZag`] tries to preserve overall order of both caps
/// by iterating on the caps' structures as the following matrix shows:
///
/// ```text
///          caps1
///       +-------------
///       | 1  2  4  7
/// caps2 | 3  5  8 10
///       | 6  9 11 12
/// ```
/// Used when there is no explicit precedence of one caps over the other. e.g.
/// tee's sink pad getcaps function, it will probe its src pad peers' for their
/// caps and intersect them with this mode.
///
/// [`Self::First`] is useful when an element wants to preserve
/// another element's caps priority order when intersecting with its own caps.
/// Example: If caps1 is [A, B, C] and caps2 is [E, B, D, A], the result
/// would be [A, B], maintaining the first caps priority on the intersection.
#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstCapsIntersectMode")]
pub enum CapsIntersectMode {
    /// Zig-zags over both caps.
    #[doc(alias = "GST_CAPS_INTERSECT_ZIG_ZAG")]
    ZigZag,
    /// Keeps the first caps order.
    #[doc(alias = "GST_CAPS_INTERSECT_FIRST")]
    First,
    #[doc(hidden)]
    __Unknown(i32),
}

#[doc(hidden)]
impl IntoGlib for CapsIntersectMode {
    type GlibType = ffi::GstCapsIntersectMode;

    fn into_glib(self) -> ffi::GstCapsIntersectMode {
        match self {
            Self::ZigZag => ffi::GST_CAPS_INTERSECT_ZIG_ZAG,
            Self::First => ffi::GST_CAPS_INTERSECT_FIRST,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstCapsIntersectMode> for CapsIntersectMode {
    unsafe fn from_glib(value: ffi::GstCapsIntersectMode) -> Self {
        skip_assert_initialized!();
        match value {
            0 => Self::ZigZag,
            1 => Self::First,
            value => Self::__Unknown(value),
        }
    }
}

impl StaticType for CapsIntersectMode {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_caps_intersect_mode_get_type()) }
    }
}

impl glib::value::ValueType for CapsIntersectMode {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for CapsIntersectMode {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for CapsIntersectMode {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// The type of the clock entry
#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstClockEntryType")]
pub enum ClockEntryType {
    /// a single shot timeout
    #[doc(alias = "GST_CLOCK_ENTRY_SINGLE")]
    Single,
    /// a periodic timeout request
    #[doc(alias = "GST_CLOCK_ENTRY_PERIODIC")]
    Periodic,
    #[doc(hidden)]
    __Unknown(i32),
}

#[doc(hidden)]
impl IntoGlib for ClockEntryType {
    type GlibType = ffi::GstClockEntryType;

    fn into_glib(self) -> ffi::GstClockEntryType {
        match self {
            Self::Single => ffi::GST_CLOCK_ENTRY_SINGLE,
            Self::Periodic => ffi::GST_CLOCK_ENTRY_PERIODIC,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstClockEntryType> for ClockEntryType {
    unsafe fn from_glib(value: ffi::GstClockEntryType) -> Self {
        skip_assert_initialized!();
        match value {
            0 => Self::Single,
            1 => Self::Periodic,
            value => Self::__Unknown(value),
        }
    }
}

impl StaticType for ClockEntryType {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_clock_entry_type_get_type()) }
    }
}

impl glib::value::ValueType for ClockEntryType {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for ClockEntryType {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for ClockEntryType {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// The return value of a clock operation.
#[must_use]
#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstClockReturn")]
pub enum ClockReturn {
    /// The operation succeeded.
    #[doc(alias = "GST_CLOCK_OK")]
    Ok,
    /// The operation was scheduled too late.
    #[doc(alias = "GST_CLOCK_EARLY")]
    Early,
    /// The clockID was unscheduled
    #[doc(alias = "GST_CLOCK_UNSCHEDULED")]
    Unscheduled,
    /// The ClockID is busy
    #[doc(alias = "GST_CLOCK_BUSY")]
    Busy,
    /// A bad time was provided to a function.
    #[doc(alias = "GST_CLOCK_BADTIME")]
    Badtime,
    /// An error occurred
    #[doc(alias = "GST_CLOCK_ERROR")]
    Error,
    /// Operation is not supported
    #[doc(alias = "GST_CLOCK_UNSUPPORTED")]
    Unsupported,
    /// The ClockID is done waiting
    #[doc(alias = "GST_CLOCK_DONE")]
    Done,
    #[doc(hidden)]
    __Unknown(i32),
}

#[doc(hidden)]
impl IntoGlib for ClockReturn {
    type GlibType = ffi::GstClockReturn;

    fn into_glib(self) -> ffi::GstClockReturn {
        match self {
            Self::Ok => ffi::GST_CLOCK_OK,
            Self::Early => ffi::GST_CLOCK_EARLY,
            Self::Unscheduled => ffi::GST_CLOCK_UNSCHEDULED,
            Self::Busy => ffi::GST_CLOCK_BUSY,
            Self::Badtime => ffi::GST_CLOCK_BADTIME,
            Self::Error => ffi::GST_CLOCK_ERROR,
            Self::Unsupported => ffi::GST_CLOCK_UNSUPPORTED,
            Self::Done => ffi::GST_CLOCK_DONE,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstClockReturn> for ClockReturn {
    unsafe fn from_glib(value: ffi::GstClockReturn) -> Self {
        skip_assert_initialized!();
        match value {
            0 => Self::Ok,
            1 => Self::Early,
            2 => Self::Unscheduled,
            3 => Self::Busy,
            4 => Self::Badtime,
            5 => Self::Error,
            6 => Self::Unsupported,
            7 => Self::Done,
            value => Self::__Unknown(value),
        }
    }
}

impl StaticType for ClockReturn {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_clock_return_get_type()) }
    }
}

impl glib::value::ValueType for ClockReturn {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for ClockReturn {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for ClockReturn {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// The different kind of clocks.
#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstClockType")]
pub enum ClockType {
    /// time since Epoch
    #[doc(alias = "GST_CLOCK_TYPE_REALTIME")]
    Realtime,
    /// monotonic time since some unspecified starting
    ///  point
    #[doc(alias = "GST_CLOCK_TYPE_MONOTONIC")]
    Monotonic,
    /// some other time source is used (Since: 1.0.5)
    #[doc(alias = "GST_CLOCK_TYPE_OTHER")]
    Other,
    /// time since Epoch, but using International Atomic Time
    ///  as reference (Since: 1.18)
    #[cfg(any(feature = "v1_18", feature = "dox"))]
    #[cfg_attr(feature = "dox", doc(cfg(feature = "v1_18")))]
    #[doc(alias = "GST_CLOCK_TYPE_TAI")]
    Tai,
    #[doc(hidden)]
    __Unknown(i32),
}

#[doc(hidden)]
impl IntoGlib for ClockType {
    type GlibType = ffi::GstClockType;

    fn into_glib(self) -> ffi::GstClockType {
        match self {
            Self::Realtime => ffi::GST_CLOCK_TYPE_REALTIME,
            Self::Monotonic => ffi::GST_CLOCK_TYPE_MONOTONIC,
            Self::Other => ffi::GST_CLOCK_TYPE_OTHER,
            #[cfg(any(feature = "v1_18", feature = "dox"))]
            Self::Tai => ffi::GST_CLOCK_TYPE_TAI,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstClockType> for ClockType {
    unsafe fn from_glib(value: ffi::GstClockType) -> Self {
        skip_assert_initialized!();
        match value {
            0 => Self::Realtime,
            1 => Self::Monotonic,
            2 => Self::Other,
            #[cfg(any(feature = "v1_18", feature = "dox"))]
            3 => Self::Tai,
            value => Self::__Unknown(value),
        }
    }
}

impl StaticType for ClockType {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_clock_type_get_type()) }
    }
}

impl glib::value::ValueType for ClockType {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for ClockType {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for ClockType {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// Core errors are errors inside the core GStreamer library.
#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstCoreError")]
pub enum CoreError {
    /// a general error which doesn't fit in any other
    /// category. Make sure you add a custom message to the error call.
    #[doc(alias = "GST_CORE_ERROR_FAILED")]
    Failed,
    /// do not use this except as a placeholder for
    /// deciding where to go while developing code.
    #[doc(alias = "GST_CORE_ERROR_TOO_LAZY")]
    TooLazy,
    /// use this when you do not want to implement
    /// this functionality yet.
    #[doc(alias = "GST_CORE_ERROR_NOT_IMPLEMENTED")]
    NotImplemented,
    /// used for state change errors.
    #[doc(alias = "GST_CORE_ERROR_STATE_CHANGE")]
    StateChange,
    /// used for pad-related errors.
    #[doc(alias = "GST_CORE_ERROR_PAD")]
    Pad,
    /// used for thread-related errors.
    #[doc(alias = "GST_CORE_ERROR_THREAD")]
    Thread,
    /// used for negotiation-related errors.
    #[doc(alias = "GST_CORE_ERROR_NEGOTIATION")]
    Negotiation,
    /// used for event-related errors.
    #[doc(alias = "GST_CORE_ERROR_EVENT")]
    Event,
    /// used for seek-related errors.
    #[doc(alias = "GST_CORE_ERROR_SEEK")]
    Seek,
    /// used for caps-related errors.
    #[doc(alias = "GST_CORE_ERROR_CAPS")]
    Caps,
    /// used for negotiation-related errors.
    #[doc(alias = "GST_CORE_ERROR_TAG")]
    Tag,
    /// used if a plugin is missing.
    #[doc(alias = "GST_CORE_ERROR_MISSING_PLUGIN")]
    MissingPlugin,
    /// used for clock related errors.
    #[doc(alias = "GST_CORE_ERROR_CLOCK")]
    Clock,
    /// used if functionality has been disabled at
    ///  compile time.
    #[doc(alias = "GST_CORE_ERROR_DISABLED")]
    Disabled,
    /// the number of core error types.
    #[doc(alias = "GST_CORE_ERROR_NUM_ERRORS")]
    NumErrors,
    #[doc(hidden)]
    __Unknown(i32),
}

#[doc(hidden)]
impl IntoGlib for CoreError {
    type GlibType = ffi::GstCoreError;

    fn into_glib(self) -> ffi::GstCoreError {
        match self {
            Self::Failed => ffi::GST_CORE_ERROR_FAILED,
            Self::TooLazy => ffi::GST_CORE_ERROR_TOO_LAZY,
            Self::NotImplemented => ffi::GST_CORE_ERROR_NOT_IMPLEMENTED,
            Self::StateChange => ffi::GST_CORE_ERROR_STATE_CHANGE,
            Self::Pad => ffi::GST_CORE_ERROR_PAD,
            Self::Thread => ffi::GST_CORE_ERROR_THREAD,
            Self::Negotiation => ffi::GST_CORE_ERROR_NEGOTIATION,
            Self::Event => ffi::GST_CORE_ERROR_EVENT,
            Self::Seek => ffi::GST_CORE_ERROR_SEEK,
            Self::Caps => ffi::GST_CORE_ERROR_CAPS,
            Self::Tag => ffi::GST_CORE_ERROR_TAG,
            Self::MissingPlugin => ffi::GST_CORE_ERROR_MISSING_PLUGIN,
            Self::Clock => ffi::GST_CORE_ERROR_CLOCK,
            Self::Disabled => ffi::GST_CORE_ERROR_DISABLED,
            Self::NumErrors => ffi::GST_CORE_ERROR_NUM_ERRORS,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstCoreError> for CoreError {
    unsafe fn from_glib(value: ffi::GstCoreError) -> Self {
        skip_assert_initialized!();
        match value {
            1 => Self::Failed,
            2 => Self::TooLazy,
            3 => Self::NotImplemented,
            4 => Self::StateChange,
            5 => Self::Pad,
            6 => Self::Thread,
            7 => Self::Negotiation,
            8 => Self::Event,
            9 => Self::Seek,
            10 => Self::Caps,
            11 => Self::Tag,
            12 => Self::MissingPlugin,
            13 => Self::Clock,
            14 => Self::Disabled,
            15 => Self::NumErrors,
            value => Self::__Unknown(value),
        }
    }
}

impl ErrorDomain for CoreError {
    fn domain() -> Quark {
        skip_assert_initialized!();

        unsafe { from_glib(ffi::gst_core_error_quark()) }
    }

    fn code(self) -> i32 {
        self.into_glib()
    }

    fn from(code: i32) -> Option<Self> {
        skip_assert_initialized!();
        match code {
            1 => Some(Self::Failed),
            2 => Some(Self::TooLazy),
            3 => Some(Self::NotImplemented),
            4 => Some(Self::StateChange),
            5 => Some(Self::Pad),
            6 => Some(Self::Thread),
            7 => Some(Self::Negotiation),
            8 => Some(Self::Event),
            9 => Some(Self::Seek),
            10 => Some(Self::Caps),
            11 => Some(Self::Tag),
            12 => Some(Self::MissingPlugin),
            13 => Some(Self::Clock),
            14 => Some(Self::Disabled),
            15 => Some(Self::NumErrors),
            _ => Some(Self::Failed),
        }
    }
}

impl StaticType for CoreError {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_core_error_get_type()) }
    }
}

impl glib::value::ValueType for CoreError {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for CoreError {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for CoreError {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// The level defines the importance of a debugging message. The more important a
/// message is, the greater the probability that the debugging system outputs it.
#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstDebugLevel")]
pub enum DebugLevel {
    /// No debugging level specified or desired. Used to deactivate
    ///  debugging output.
    #[doc(alias = "GST_LEVEL_NONE")]
    None,
    /// Error messages are to be used only when an error occurred
    ///  that stops the application from keeping working correctly.
    ///  An examples is gst_element_error, which outputs a message with this priority.
    ///  It does not mean that the application is terminating as with g_error.
    #[doc(alias = "GST_LEVEL_ERROR")]
    Error,
    /// Warning messages are to inform about abnormal behaviour
    ///  that could lead to problems or weird behaviour later on. An example of this
    ///  would be clocking issues ("your computer is pretty slow") or broken input
    ///  data ("Can't synchronize to stream.")
    #[doc(alias = "GST_LEVEL_WARNING")]
    Warning,
    /// Fixme messages are messages that indicate that something
    ///  in the executed code path is not fully implemented or handled yet. Note
    ///  that this does not replace proper error handling in any way, the purpose
    ///  of this message is to make it easier to spot incomplete/unfinished pieces
    ///  of code when reading the debug log.
    #[doc(alias = "GST_LEVEL_FIXME")]
    Fixme,
    /// Informational messages should be used to keep the developer
    ///  updated about what is happening.
    ///  Examples where this should be used are when a typefind function has
    ///  successfully determined the type of the stream or when an mp3 plugin detects
    ///  the format to be used. ("This file has mono sound.")
    #[doc(alias = "GST_LEVEL_INFO")]
    Info,
    /// Debugging messages should be used when something common
    ///  happens that is not the expected default behavior, or something that's
    ///  useful to know but doesn't happen all the time (ie. per loop iteration or
    ///  buffer processed or event handled).
    ///  An example would be notifications about state changes or receiving/sending
    ///  of events.
    #[doc(alias = "GST_LEVEL_DEBUG")]
    Debug,
    /// Log messages are messages that are very common but might be
    ///  useful to know. As a rule of thumb a pipeline that is running as expected
    ///  should never output anything else but LOG messages whilst processing data.
    ///  Use this log level to log recurring information in chain functions and
    ///  loop functions, for example.
    #[doc(alias = "GST_LEVEL_LOG")]
    Log,
    /// Tracing-related messages.
    ///  Examples for this are referencing/dereferencing of objects.
    #[doc(alias = "GST_LEVEL_TRACE")]
    Trace,
    /// memory dump messages are used to log (small) chunks of
    ///  data as memory dumps in the log. They will be displayed as hexdump with
    ///  ASCII characters.
    #[doc(alias = "GST_LEVEL_MEMDUMP")]
    Memdump,
    /// The number of defined debugging levels.
    #[doc(alias = "GST_LEVEL_COUNT")]
    Count,
    #[doc(hidden)]
    __Unknown(i32),
}

impl DebugLevel {
    pub fn name<'a>(self) -> &'a str {
        unsafe {
            CStr::from_ptr(
                ffi::gst_debug_level_get_name(self.into_glib())
                    .as_ref()
                    .expect("gst_debug_level_get_name returned NULL"),
            )
            .to_str()
            .expect("gst_debug_level_get_name returned an invalid string")
        }
    }
}

impl fmt::Display for DebugLevel {
    #[inline]
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        f.write_str(&self.name())
    }
}

#[doc(hidden)]
impl IntoGlib for DebugLevel {
    type GlibType = ffi::GstDebugLevel;

    fn into_glib(self) -> ffi::GstDebugLevel {
        match self {
            Self::None => ffi::GST_LEVEL_NONE,
            Self::Error => ffi::GST_LEVEL_ERROR,
            Self::Warning => ffi::GST_LEVEL_WARNING,
            Self::Fixme => ffi::GST_LEVEL_FIXME,
            Self::Info => ffi::GST_LEVEL_INFO,
            Self::Debug => ffi::GST_LEVEL_DEBUG,
            Self::Log => ffi::GST_LEVEL_LOG,
            Self::Trace => ffi::GST_LEVEL_TRACE,
            Self::Memdump => ffi::GST_LEVEL_MEMDUMP,
            Self::Count => ffi::GST_LEVEL_COUNT,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstDebugLevel> for DebugLevel {
    unsafe fn from_glib(value: ffi::GstDebugLevel) -> Self {
        skip_assert_initialized!();
        match value {
            0 => Self::None,
            1 => Self::Error,
            2 => Self::Warning,
            3 => Self::Fixme,
            4 => Self::Info,
            5 => Self::Debug,
            6 => Self::Log,
            7 => Self::Trace,
            9 => Self::Memdump,
            10 => Self::Count,
            value => Self::__Unknown(value),
        }
    }
}

impl StaticType for DebugLevel {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_debug_level_get_type()) }
    }
}

impl glib::value::ValueType for DebugLevel {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for DebugLevel {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for DebugLevel {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// [`crate::EventType`] lists the standard event types that can be sent in a pipeline.
///
/// The custom event types can be used for private messages between elements
/// that can't be expressed using normal
/// GStreamer buffer passing semantics. Custom events carry an arbitrary
/// [`crate::Structure`].
/// Specific custom events are distinguished by the name of the structure.
#[derive(Debug, PartialEq, Eq, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstEventType")]
pub enum EventType {
    /// unknown event.
    #[doc(alias = "GST_EVENT_UNKNOWN")]
    Unknown,
    /// Start a flush operation. This event clears all data
    ///  from the pipeline and unblock all streaming threads.
    #[doc(alias = "GST_EVENT_FLUSH_START")]
    FlushStart,
    /// Stop a flush operation. This event resets the
    ///  running-time of the pipeline.
    #[doc(alias = "GST_EVENT_FLUSH_STOP")]
    FlushStop,
    /// Event to mark the start of a new stream. Sent before any
    ///  other serialized event and only sent at the start of a new stream,
    ///  not after flushing seeks.
    #[doc(alias = "GST_EVENT_STREAM_START")]
    StreamStart,
    /// [`crate::Caps`] event. Notify the pad of a new media type.
    #[doc(alias = "GST_EVENT_CAPS")]
    Caps,
    /// A new media segment follows in the dataflow. The
    ///  segment events contains information for clipping buffers and
    ///  converting buffer timestamps to running-time and
    ///  stream-time.
    #[doc(alias = "GST_EVENT_SEGMENT")]
    Segment,
    /// A new [`crate::StreamCollection`] is available (Since: 1.10)
    #[doc(alias = "GST_EVENT_STREAM_COLLECTION")]
    StreamCollection,
    /// A new set of metadata tags has been found in the stream.
    #[doc(alias = "GST_EVENT_TAG")]
    Tag,
    /// Notification of buffering requirements. Currently not
    ///  used yet.
    #[doc(alias = "GST_EVENT_BUFFERSIZE")]
    Buffersize,
    /// An event that sinks turn into a message. Used to
    ///  send messages that should be emitted in sync with
    ///  rendering.
    #[doc(alias = "GST_EVENT_SINK_MESSAGE")]
    SinkMessage,
    /// Indicates that there is no more data for
    ///  the stream group ID in the message. Sent before EOS
    ///  in some instances and should be handled mostly the same. (Since: 1.10)
    #[cfg(any(feature = "v1_10", feature = "dox"))]
    #[cfg_attr(feature = "dox", doc(cfg(feature = "v1_10")))]
    #[doc(alias = "GST_EVENT_STREAM_GROUP_DONE")]
    StreamGroupDone,
    /// End-Of-Stream. No more data is to be expected to follow
    ///  without either a STREAM_START event, or a FLUSH_STOP and a SEGMENT
    ///  event.
    #[doc(alias = "GST_EVENT_EOS")]
    Eos,
    /// An event which indicates that a new table of contents (TOC)
    ///  was found or updated.
    #[doc(alias = "GST_EVENT_TOC")]
    Toc,
    /// An event which indicates that new or updated
    ///  encryption information has been found in the stream.
    #[doc(alias = "GST_EVENT_PROTECTION")]
    Protection,
    /// Marks the end of a segment playback.
    #[doc(alias = "GST_EVENT_SEGMENT_DONE")]
    SegmentDone,
    /// Marks a gap in the datastream.
    #[doc(alias = "GST_EVENT_GAP")]
    Gap,
    /// Notify downstream that a playback rate override
    ///  should be applied as soon as possible. (Since: 1.18)
    #[cfg(any(feature = "v1_18", feature = "dox"))]
    #[cfg_attr(feature = "dox", doc(cfg(feature = "v1_18")))]
    #[doc(alias = "GST_EVENT_INSTANT_RATE_CHANGE")]
    InstantRateChange,
    /// A quality message. Used to indicate to upstream elements
    ///  that the downstream elements should adjust their processing
    ///  rate.
    #[doc(alias = "GST_EVENT_QOS")]
    Qos,
    /// A request for a new playback position and rate.
    #[doc(alias = "GST_EVENT_SEEK")]
    Seek,
    /// Navigation events are usually used for communicating
    ///  user requests, such as mouse or keyboard movements,
    ///  to upstream elements.
    #[doc(alias = "GST_EVENT_NAVIGATION")]
    Navigation,
    /// Notification of new latency adjustment. Sinks will use
    ///  the latency information to adjust their synchronisation.
    #[doc(alias = "GST_EVENT_LATENCY")]
    Latency,
    /// A request for stepping through the media. Sinks will usually
    ///  execute the step operation.
    #[doc(alias = "GST_EVENT_STEP")]
    Step,
    /// A request for upstream renegotiating caps and reconfiguring.
    #[doc(alias = "GST_EVENT_RECONFIGURE")]
    Reconfigure,
    /// A request for a new playback position based on TOC
    ///  entry's UID.
    #[doc(alias = "GST_EVENT_TOC_SELECT")]
    TocSelect,
    /// A request to select one or more streams (Since: 1.10)
    #[cfg(any(feature = "v1_10", feature = "dox"))]
    #[cfg_attr(feature = "dox", doc(cfg(feature = "v1_10")))]
    #[doc(alias = "GST_EVENT_SELECT_STREAMS")]
    SelectStreams,
    /// Sent by the pipeline to notify elements that handle the
    ///  instant-rate-change event about the running-time when
    ///  the rate multiplier should be applied (or was applied). (Since: 1.18)
    #[cfg(any(feature = "v1_18", feature = "dox"))]
    #[cfg_attr(feature = "dox", doc(cfg(feature = "v1_18")))]
    #[doc(alias = "GST_EVENT_INSTANT_RATE_SYNC_TIME")]
    InstantRateSyncTime,
    /// Upstream custom event
    #[doc(alias = "GST_EVENT_CUSTOM_UPSTREAM")]
    CustomUpstream,
    /// Downstream custom event that travels in the
    ///  data flow.
    #[doc(alias = "GST_EVENT_CUSTOM_DOWNSTREAM")]
    CustomDownstream,
    /// Custom out-of-band downstream event.
    #[doc(alias = "GST_EVENT_CUSTOM_DOWNSTREAM_OOB")]
    CustomDownstreamOob,
    /// Custom sticky downstream event.
    #[doc(alias = "GST_EVENT_CUSTOM_DOWNSTREAM_STICKY")]
    CustomDownstreamSticky,
    /// Custom upstream or downstream event.
    ///  In-band when travelling downstream.
    #[doc(alias = "GST_EVENT_CUSTOM_BOTH")]
    CustomBoth,
    /// Custom upstream or downstream out-of-band event.
    #[doc(alias = "GST_EVENT_CUSTOM_BOTH_OOB")]
    CustomBothOob,
    #[doc(hidden)]
    __Unknown(i32),
}

impl EventType {
    #[doc(alias = "gst_event_type_get_flags")]
    #[doc(alias = "get_flags")]
    pub fn flags(self) -> EventTypeFlags {
        assert_initialized_main_thread!();
        unsafe { from_glib(ffi::gst_event_type_get_flags(self.into_glib())) }
    }

    pub fn name<'a>(self) -> &'a str {
        unsafe {
            CStr::from_ptr(
                ffi::gst_event_type_get_name(self.into_glib())
                    .as_ref()
                    .expect("gst_event_type_get_name returned NULL"),
            )
            .to_str()
            .expect("gst_event_type_get_name returned an invalid string")
        }
    }

    #[doc(alias = "gst_event_type_to_quark")]
    pub fn to_quark(self) -> glib::Quark {
        assert_initialized_main_thread!();
        unsafe { from_glib(ffi::gst_event_type_to_quark(self.into_glib())) }
    }
}

impl fmt::Display for EventType {
    #[inline]
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        f.write_str(&self.name())
    }
}

#[doc(hidden)]
impl IntoGlib for EventType {
    type GlibType = ffi::GstEventType;

    fn into_glib(self) -> ffi::GstEventType {
        match self {
            Self::Unknown => ffi::GST_EVENT_UNKNOWN,
            Self::FlushStart => ffi::GST_EVENT_FLUSH_START,
            Self::FlushStop => ffi::GST_EVENT_FLUSH_STOP,
            Self::StreamStart => ffi::GST_EVENT_STREAM_START,
            Self::Caps => ffi::GST_EVENT_CAPS,
            Self::Segment => ffi::GST_EVENT_SEGMENT,
            Self::StreamCollection => ffi::GST_EVENT_STREAM_COLLECTION,
            Self::Tag => ffi::GST_EVENT_TAG,
            Self::Buffersize => ffi::GST_EVENT_BUFFERSIZE,
            Self::SinkMessage => ffi::GST_EVENT_SINK_MESSAGE,
            #[cfg(any(feature = "v1_10", feature = "dox"))]
            Self::StreamGroupDone => ffi::GST_EVENT_STREAM_GROUP_DONE,
            Self::Eos => ffi::GST_EVENT_EOS,
            Self::Toc => ffi::GST_EVENT_TOC,
            Self::Protection => ffi::GST_EVENT_PROTECTION,
            Self::SegmentDone => ffi::GST_EVENT_SEGMENT_DONE,
            Self::Gap => ffi::GST_EVENT_GAP,
            #[cfg(any(feature = "v1_18", feature = "dox"))]
            Self::InstantRateChange => ffi::GST_EVENT_INSTANT_RATE_CHANGE,
            Self::Qos => ffi::GST_EVENT_QOS,
            Self::Seek => ffi::GST_EVENT_SEEK,
            Self::Navigation => ffi::GST_EVENT_NAVIGATION,
            Self::Latency => ffi::GST_EVENT_LATENCY,
            Self::Step => ffi::GST_EVENT_STEP,
            Self::Reconfigure => ffi::GST_EVENT_RECONFIGURE,
            Self::TocSelect => ffi::GST_EVENT_TOC_SELECT,
            #[cfg(any(feature = "v1_10", feature = "dox"))]
            Self::SelectStreams => ffi::GST_EVENT_SELECT_STREAMS,
            #[cfg(any(feature = "v1_18", feature = "dox"))]
            Self::InstantRateSyncTime => ffi::GST_EVENT_INSTANT_RATE_SYNC_TIME,
            Self::CustomUpstream => ffi::GST_EVENT_CUSTOM_UPSTREAM,
            Self::CustomDownstream => ffi::GST_EVENT_CUSTOM_DOWNSTREAM,
            Self::CustomDownstreamOob => ffi::GST_EVENT_CUSTOM_DOWNSTREAM_OOB,
            Self::CustomDownstreamSticky => ffi::GST_EVENT_CUSTOM_DOWNSTREAM_STICKY,
            Self::CustomBoth => ffi::GST_EVENT_CUSTOM_BOTH,
            Self::CustomBothOob => ffi::GST_EVENT_CUSTOM_BOTH_OOB,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstEventType> for EventType {
    unsafe fn from_glib(value: ffi::GstEventType) -> Self {
        skip_assert_initialized!();
        match value {
            0 => Self::Unknown,
            2563 => Self::FlushStart,
            5127 => Self::FlushStop,
            10254 => Self::StreamStart,
            12814 => Self::Caps,
            17934 => Self::Segment,
            19230 => Self::StreamCollection,
            20510 => Self::Tag,
            23054 => Self::Buffersize,
            25630 => Self::SinkMessage,
            #[cfg(any(feature = "v1_10", feature = "dox"))]
            26894 => Self::StreamGroupDone,
            28174 => Self::Eos,
            30750 => Self::Toc,
            33310 => Self::Protection,
            38406 => Self::SegmentDone,
            40966 => Self::Gap,
            #[cfg(any(feature = "v1_18", feature = "dox"))]
            46090 => Self::InstantRateChange,
            48641 => Self::Qos,
            51201 => Self::Seek,
            53761 => Self::Navigation,
            56321 => Self::Latency,
            58881 => Self::Step,
            61441 => Self::Reconfigure,
            64001 => Self::TocSelect,
            #[cfg(any(feature = "v1_10", feature = "dox"))]
            66561 => Self::SelectStreams,
            #[cfg(any(feature = "v1_18", feature = "dox"))]
            66817 => Self::InstantRateSyncTime,
            69121 => Self::CustomUpstream,
            71686 => Self::CustomDownstream,
            74242 => Self::CustomDownstreamOob,
            76830 => Self::CustomDownstreamSticky,
            79367 => Self::CustomBoth,
            81923 => Self::CustomBothOob,
            value => Self::__Unknown(value),
        }
    }
}

impl StaticType for EventType {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_event_type_get_type()) }
    }
}

impl glib::value::ValueType for EventType {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for EventType {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for EventType {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// The result of passing data to a pad.
///
/// Note that the custom return values should not be exposed outside of the
/// element scope.
#[must_use]
#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstFlowReturn")]
pub enum FlowReturn {
    /// Pre-defined custom success code.
    #[doc(alias = "GST_FLOW_CUSTOM_SUCCESS_2")]
    CustomSuccess2,
    /// Pre-defined custom success code (define your
    ///  custom success code to this to avoid compiler
    ///  warnings).
    #[doc(alias = "GST_FLOW_CUSTOM_SUCCESS_1")]
    CustomSuccess1,
    /// Elements can use values starting from
    ///  this (and higher) to define custom success
    ///  codes.
    #[doc(alias = "GST_FLOW_CUSTOM_SUCCESS")]
    CustomSuccess,
    /// Data passing was ok.
    #[doc(alias = "GST_FLOW_OK")]
    Ok,
    /// Pad is not linked.
    #[doc(alias = "GST_FLOW_NOT_LINKED")]
    NotLinked,
    /// Pad is flushing.
    #[doc(alias = "GST_FLOW_FLUSHING")]
    Flushing,
    /// Pad is EOS.
    #[doc(alias = "GST_FLOW_EOS")]
    Eos,
    /// Pad is not negotiated.
    #[doc(alias = "GST_FLOW_NOT_NEGOTIATED")]
    NotNegotiated,
    /// Some (fatal) error occurred. Element generating
    ///  this error should post an error message using
    ///  GST_ELEMENT_ERROR() with more details.
    #[doc(alias = "GST_FLOW_ERROR")]
    Error,
    /// This operation is not supported.
    #[doc(alias = "GST_FLOW_NOT_SUPPORTED")]
    NotSupported,
    /// Elements can use values starting from
    ///  this (and lower) to define custom error codes.
    #[doc(alias = "GST_FLOW_CUSTOM_ERROR")]
    CustomError,
    /// Pre-defined custom error code (define your
    ///  custom error code to this to avoid compiler
    ///  warnings).
    #[doc(alias = "GST_FLOW_CUSTOM_ERROR_1")]
    CustomError1,
    /// Pre-defined custom error code.
    #[doc(alias = "GST_FLOW_CUSTOM_ERROR_2")]
    CustomError2,
    #[doc(hidden)]
    __Unknown(i32),
}

#[doc(hidden)]
impl IntoGlib for FlowReturn {
    type GlibType = ffi::GstFlowReturn;

    fn into_glib(self) -> ffi::GstFlowReturn {
        match self {
            Self::CustomSuccess2 => ffi::GST_FLOW_CUSTOM_SUCCESS_2,
            Self::CustomSuccess1 => ffi::GST_FLOW_CUSTOM_SUCCESS_1,
            Self::CustomSuccess => ffi::GST_FLOW_CUSTOM_SUCCESS,
            Self::Ok => ffi::GST_FLOW_OK,
            Self::NotLinked => ffi::GST_FLOW_NOT_LINKED,
            Self::Flushing => ffi::GST_FLOW_FLUSHING,
            Self::Eos => ffi::GST_FLOW_EOS,
            Self::NotNegotiated => ffi::GST_FLOW_NOT_NEGOTIATED,
            Self::Error => ffi::GST_FLOW_ERROR,
            Self::NotSupported => ffi::GST_FLOW_NOT_SUPPORTED,
            Self::CustomError => ffi::GST_FLOW_CUSTOM_ERROR,
            Self::CustomError1 => ffi::GST_FLOW_CUSTOM_ERROR_1,
            Self::CustomError2 => ffi::GST_FLOW_CUSTOM_ERROR_2,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstFlowReturn> for FlowReturn {
    unsafe fn from_glib(value: ffi::GstFlowReturn) -> Self {
        skip_assert_initialized!();
        match value {
            102 => Self::CustomSuccess2,
            101 => Self::CustomSuccess1,
            100 => Self::CustomSuccess,
            0 => Self::Ok,
            -1 => Self::NotLinked,
            -2 => Self::Flushing,
            -3 => Self::Eos,
            -4 => Self::NotNegotiated,
            -5 => Self::Error,
            -6 => Self::NotSupported,
            -100 => Self::CustomError,
            -101 => Self::CustomError1,
            -102 => Self::CustomError2,
            value => Self::__Unknown(value),
        }
    }
}

impl StaticType for FlowReturn {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_flow_return_get_type()) }
    }
}

impl glib::value::ValueType for FlowReturn {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for FlowReturn {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for FlowReturn {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// Standard predefined formats
#[cfg_attr(feature = "ser_de", derive(serde::Serialize, serde::Deserialize))]
#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstFormat")]
pub enum Format {
    /// undefined format
    #[doc(alias = "GST_FORMAT_UNDEFINED")]
    Undefined,
    /// the default format of the pad/element. This can be
    ///  samples for raw audio, frames/fields for raw video (some, but not all,
    ///  elements support this; use [`Self::Time`] if you don't have a good
    ///  reason to query for samples/frames)
    #[doc(alias = "GST_FORMAT_DEFAULT")]
    Default,
    /// bytes
    #[doc(alias = "GST_FORMAT_BYTES")]
    Bytes,
    /// time in nanoseconds
    #[doc(alias = "GST_FORMAT_TIME")]
    Time,
    /// buffers (few, if any, elements implement this as of
    ///  May 2009)
    #[doc(alias = "GST_FORMAT_BUFFERS")]
    Buffers,
    /// percentage of stream (few, if any, elements implement
    ///  this as of May 2009)
    #[doc(alias = "GST_FORMAT_PERCENT")]
    Percent,
    #[doc(hidden)]
    __Unknown(i32),
}

impl Format {
    #[doc(alias = "gst_format_get_by_nick")]
    #[doc(alias = "get_by_nick")]
    pub fn by_nick(nick: &str) -> Format {
        assert_initialized_main_thread!();
        unsafe { from_glib(ffi::gst_format_get_by_nick(nick.to_glib_none().0)) }
    }

    //#[doc(alias = "gst_format_get_details")]
    //#[doc(alias = "get_details")]
    //pub fn details(self) -> /*Ignored*/Option<FormatDefinition> {
    //    unsafe { TODO: call ffi:gst_format_get_details() }
    //}

    #[doc(alias = "gst_format_get_name")]
    #[doc(alias = "get_name")]
    pub fn name(self) -> Option<glib::GString> {
        assert_initialized_main_thread!();
        unsafe { from_glib_none(ffi::gst_format_get_name(self.into_glib())) }
    }

    //#[doc(alias = "gst_format_iterate_definitions")]
    //pub fn iterate_definitions() -> /*Ignored*/Iterator {
    //    unsafe { TODO: call ffi:gst_format_iterate_definitions() }
    //}

    #[doc(alias = "gst_format_to_quark")]
    pub fn to_quark(self) -> glib::Quark {
        assert_initialized_main_thread!();
        unsafe { from_glib(ffi::gst_format_to_quark(self.into_glib())) }
    }
}

#[doc(hidden)]
impl IntoGlib for Format {
    type GlibType = ffi::GstFormat;

    fn into_glib(self) -> ffi::GstFormat {
        match self {
            Self::Undefined => ffi::GST_FORMAT_UNDEFINED,
            Self::Default => ffi::GST_FORMAT_DEFAULT,
            Self::Bytes => ffi::GST_FORMAT_BYTES,
            Self::Time => ffi::GST_FORMAT_TIME,
            Self::Buffers => ffi::GST_FORMAT_BUFFERS,
            Self::Percent => ffi::GST_FORMAT_PERCENT,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstFormat> for Format {
    unsafe fn from_glib(value: ffi::GstFormat) -> Self {
        skip_assert_initialized!();
        match value {
            0 => Self::Undefined,
            1 => Self::Default,
            2 => Self::Bytes,
            3 => Self::Time,
            4 => Self::Buffers,
            5 => Self::Percent,
            value => Self::__Unknown(value),
        }
    }
}

impl StaticType for Format {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_format_get_type()) }
    }
}

impl glib::value::ValueType for Format {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for Format {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for Format {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// Library errors are for errors from the library being used by elements
/// (initializing, finalizing, settings, ...)
#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstLibraryError")]
pub enum LibraryError {
    /// a general error which doesn't fit in any other
    /// category. Make sure you add a custom message to the error call.
    #[doc(alias = "GST_LIBRARY_ERROR_FAILED")]
    Failed,
    /// do not use this except as a placeholder for
    /// deciding where to go while developing code.
    #[doc(alias = "GST_LIBRARY_ERROR_TOO_LAZY")]
    TooLazy,
    /// used when the library could not be opened.
    #[doc(alias = "GST_LIBRARY_ERROR_INIT")]
    Init,
    /// used when the library could not be closed.
    #[doc(alias = "GST_LIBRARY_ERROR_SHUTDOWN")]
    Shutdown,
    /// used when the library doesn't accept settings.
    #[doc(alias = "GST_LIBRARY_ERROR_SETTINGS")]
    Settings,
    /// used when the library generated an encoding error.
    #[doc(alias = "GST_LIBRARY_ERROR_ENCODE")]
    Encode,
    /// the number of library error types.
    #[doc(alias = "GST_LIBRARY_ERROR_NUM_ERRORS")]
    NumErrors,
    #[doc(hidden)]
    __Unknown(i32),
}

#[doc(hidden)]
impl IntoGlib for LibraryError {
    type GlibType = ffi::GstLibraryError;

    fn into_glib(self) -> ffi::GstLibraryError {
        match self {
            Self::Failed => ffi::GST_LIBRARY_ERROR_FAILED,
            Self::TooLazy => ffi::GST_LIBRARY_ERROR_TOO_LAZY,
            Self::Init => ffi::GST_LIBRARY_ERROR_INIT,
            Self::Shutdown => ffi::GST_LIBRARY_ERROR_SHUTDOWN,
            Self::Settings => ffi::GST_LIBRARY_ERROR_SETTINGS,
            Self::Encode => ffi::GST_LIBRARY_ERROR_ENCODE,
            Self::NumErrors => ffi::GST_LIBRARY_ERROR_NUM_ERRORS,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstLibraryError> for LibraryError {
    unsafe fn from_glib(value: ffi::GstLibraryError) -> Self {
        skip_assert_initialized!();
        match value {
            1 => Self::Failed,
            2 => Self::TooLazy,
            3 => Self::Init,
            4 => Self::Shutdown,
            5 => Self::Settings,
            6 => Self::Encode,
            7 => Self::NumErrors,
            value => Self::__Unknown(value),
        }
    }
}

impl ErrorDomain for LibraryError {
    fn domain() -> Quark {
        skip_assert_initialized!();

        unsafe { from_glib(ffi::gst_library_error_quark()) }
    }

    fn code(self) -> i32 {
        self.into_glib()
    }

    fn from(code: i32) -> Option<Self> {
        skip_assert_initialized!();
        match code {
            1 => Some(Self::Failed),
            2 => Some(Self::TooLazy),
            3 => Some(Self::Init),
            4 => Some(Self::Shutdown),
            5 => Some(Self::Settings),
            6 => Some(Self::Encode),
            7 => Some(Self::NumErrors),
            _ => Some(Self::Failed),
        }
    }
}

impl StaticType for LibraryError {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_library_error_get_type()) }
    }
}

impl glib::value::ValueType for LibraryError {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for LibraryError {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for LibraryError {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// The direction of a pad.
#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstPadDirection")]
pub enum PadDirection {
    /// direction is unknown.
    #[doc(alias = "GST_PAD_UNKNOWN")]
    Unknown,
    /// the pad is a source pad.
    #[doc(alias = "GST_PAD_SRC")]
    Src,
    /// the pad is a sink pad.
    #[doc(alias = "GST_PAD_SINK")]
    Sink,
    #[doc(hidden)]
    __Unknown(i32),
}

#[doc(hidden)]
impl IntoGlib for PadDirection {
    type GlibType = ffi::GstPadDirection;

    fn into_glib(self) -> ffi::GstPadDirection {
        match self {
            Self::Unknown => ffi::GST_PAD_UNKNOWN,
            Self::Src => ffi::GST_PAD_SRC,
            Self::Sink => ffi::GST_PAD_SINK,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstPadDirection> for PadDirection {
    unsafe fn from_glib(value: ffi::GstPadDirection) -> Self {
        skip_assert_initialized!();
        match value {
            0 => Self::Unknown,
            1 => Self::Src,
            2 => Self::Sink,
            value => Self::__Unknown(value),
        }
    }
}

impl StaticType for PadDirection {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_pad_direction_get_type()) }
    }
}

impl glib::value::ValueType for PadDirection {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for PadDirection {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for PadDirection {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// Result values from gst_pad_link and friends.
#[must_use]
#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstPadLinkReturn")]
pub enum PadLinkReturn {
    /// link succeeded
    #[doc(alias = "GST_PAD_LINK_OK")]
    Ok,
    /// pads have no common grandparent
    #[doc(alias = "GST_PAD_LINK_WRONG_HIERARCHY")]
    WrongHierarchy,
    /// pad was already linked
    #[doc(alias = "GST_PAD_LINK_WAS_LINKED")]
    WasLinked,
    /// pads have wrong direction
    #[doc(alias = "GST_PAD_LINK_WRONG_DIRECTION")]
    WrongDirection,
    /// pads do not have common format
    #[doc(alias = "GST_PAD_LINK_NOFORMAT")]
    Noformat,
    /// pads cannot cooperate in scheduling
    #[doc(alias = "GST_PAD_LINK_NOSCHED")]
    Nosched,
    /// refused for some reason
    #[doc(alias = "GST_PAD_LINK_REFUSED")]
    Refused,
    #[doc(hidden)]
    __Unknown(i32),
}

#[doc(hidden)]
impl IntoGlib for PadLinkReturn {
    type GlibType = ffi::GstPadLinkReturn;

    fn into_glib(self) -> ffi::GstPadLinkReturn {
        match self {
            Self::Ok => ffi::GST_PAD_LINK_OK,
            Self::WrongHierarchy => ffi::GST_PAD_LINK_WRONG_HIERARCHY,
            Self::WasLinked => ffi::GST_PAD_LINK_WAS_LINKED,
            Self::WrongDirection => ffi::GST_PAD_LINK_WRONG_DIRECTION,
            Self::Noformat => ffi::GST_PAD_LINK_NOFORMAT,
            Self::Nosched => ffi::GST_PAD_LINK_NOSCHED,
            Self::Refused => ffi::GST_PAD_LINK_REFUSED,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstPadLinkReturn> for PadLinkReturn {
    unsafe fn from_glib(value: ffi::GstPadLinkReturn) -> Self {
        skip_assert_initialized!();
        match value {
            0 => Self::Ok,
            -1 => Self::WrongHierarchy,
            -2 => Self::WasLinked,
            -3 => Self::WrongDirection,
            -4 => Self::Noformat,
            -5 => Self::Nosched,
            -6 => Self::Refused,
            value => Self::__Unknown(value),
        }
    }
}

impl StaticType for PadLinkReturn {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_pad_link_return_get_type()) }
    }
}

impl glib::value::ValueType for PadLinkReturn {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for PadLinkReturn {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for PadLinkReturn {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// The status of a GstPad. After activating a pad, which usually happens when the
/// parent element goes from READY to PAUSED, the GstPadMode defines if the
/// pad operates in push or pull mode.
#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstPadMode")]
pub enum PadMode {
    /// Pad will not handle dataflow
    #[doc(alias = "GST_PAD_MODE_NONE")]
    None,
    /// Pad handles dataflow in downstream push mode
    #[doc(alias = "GST_PAD_MODE_PUSH")]
    Push,
    /// Pad handles dataflow in upstream pull mode
    #[doc(alias = "GST_PAD_MODE_PULL")]
    Pull,
    #[doc(hidden)]
    __Unknown(i32),
}

impl PadMode {
    pub fn name<'a>(self) -> &'a str {
        unsafe {
            CStr::from_ptr(
                ffi::gst_pad_mode_get_name(self.into_glib())
                    .as_ref()
                    .expect("gst_pad_mode_get_name returned NULL"),
            )
            .to_str()
            .expect("gst_pad_mode_get_name returned an invalid string")
        }
    }
}

impl fmt::Display for PadMode {
    #[inline]
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        f.write_str(&self.name())
    }
}

#[doc(hidden)]
impl IntoGlib for PadMode {
    type GlibType = ffi::GstPadMode;

    fn into_glib(self) -> ffi::GstPadMode {
        match self {
            Self::None => ffi::GST_PAD_MODE_NONE,
            Self::Push => ffi::GST_PAD_MODE_PUSH,
            Self::Pull => ffi::GST_PAD_MODE_PULL,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstPadMode> for PadMode {
    unsafe fn from_glib(value: ffi::GstPadMode) -> Self {
        skip_assert_initialized!();
        match value {
            0 => Self::None,
            1 => Self::Push,
            2 => Self::Pull,
            value => Self::__Unknown(value),
        }
    }
}

impl StaticType for PadMode {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_pad_mode_get_type()) }
    }
}

impl glib::value::ValueType for PadMode {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for PadMode {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for PadMode {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// Indicates when this pad will become available.
#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstPadPresence")]
pub enum PadPresence {
    /// the pad is always available
    #[doc(alias = "GST_PAD_ALWAYS")]
    Always,
    /// the pad will become available depending on the media stream
    #[doc(alias = "GST_PAD_SOMETIMES")]
    Sometimes,
    /// the pad is only available on request with
    ///  [`crate::prelude::ElementExt::request_pad()`].
    #[doc(alias = "GST_PAD_REQUEST")]
    Request,
    #[doc(hidden)]
    __Unknown(i32),
}

#[doc(hidden)]
impl IntoGlib for PadPresence {
    type GlibType = ffi::GstPadPresence;

    fn into_glib(self) -> ffi::GstPadPresence {
        match self {
            Self::Always => ffi::GST_PAD_ALWAYS,
            Self::Sometimes => ffi::GST_PAD_SOMETIMES,
            Self::Request => ffi::GST_PAD_REQUEST,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstPadPresence> for PadPresence {
    unsafe fn from_glib(value: ffi::GstPadPresence) -> Self {
        skip_assert_initialized!();
        match value {
            0 => Self::Always,
            1 => Self::Sometimes,
            2 => Self::Request,
            value => Self::__Unknown(value),
        }
    }
}

impl StaticType for PadPresence {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_pad_presence_get_type()) }
    }
}

impl glib::value::ValueType for PadPresence {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for PadPresence {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for PadPresence {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// Different return values for the `GstPadProbeCallback`.
#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstPadProbeReturn")]
pub enum PadProbeReturn {
    /// drop data in data probes. For push mode this means that
    ///  the data item is not sent downstream. For pull mode, it means that
    ///  the data item is not passed upstream. In both cases, no other probes
    ///  are called for this item and [`crate::FlowReturn::Ok`] or [`true`] is returned to the
    ///  caller.
    #[doc(alias = "GST_PAD_PROBE_DROP")]
    Drop,
    /// normal probe return value. This leaves the probe in
    ///  place, and defers decisions about dropping or passing data to other
    ///  probes, if any. If there are no other probes, the default behaviour
    ///  for the probe type applies ('block' for blocking probes,
    ///  and 'pass' for non-blocking probes).
    #[doc(alias = "GST_PAD_PROBE_OK")]
    Ok,
    /// remove this probe.
    #[doc(alias = "GST_PAD_PROBE_REMOVE")]
    Remove,
    /// pass the data item in the block probe and block on the
    ///  next item.
    #[doc(alias = "GST_PAD_PROBE_PASS")]
    Pass,
    /// Data has been handled in the probe and will not be
    ///  forwarded further. For events and buffers this is the same behaviour as
    ///  [`Self::Drop`] (except that in this case you need to unref the buffer
    ///  or event yourself). For queries it will also return [`true`] to the caller.
    ///  The probe can also modify the [`crate::FlowReturn`] value by using the
    ///  `GST_PAD_PROBE_INFO_FLOW_RETURN`() accessor.
    ///  Note that the resulting query must contain valid entries.
    ///  Since: 1.6
    #[doc(alias = "GST_PAD_PROBE_HANDLED")]
    Handled,
    #[doc(hidden)]
    __Unknown(i32),
}

#[doc(hidden)]
impl IntoGlib for PadProbeReturn {
    type GlibType = ffi::GstPadProbeReturn;

    fn into_glib(self) -> ffi::GstPadProbeReturn {
        match self {
            Self::Drop => ffi::GST_PAD_PROBE_DROP,
            Self::Ok => ffi::GST_PAD_PROBE_OK,
            Self::Remove => ffi::GST_PAD_PROBE_REMOVE,
            Self::Pass => ffi::GST_PAD_PROBE_PASS,
            Self::Handled => ffi::GST_PAD_PROBE_HANDLED,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstPadProbeReturn> for PadProbeReturn {
    unsafe fn from_glib(value: ffi::GstPadProbeReturn) -> Self {
        skip_assert_initialized!();
        match value {
            0 => Self::Drop,
            1 => Self::Ok,
            2 => Self::Remove,
            3 => Self::Pass,
            4 => Self::Handled,
            value => Self::__Unknown(value),
        }
    }
}

impl StaticType for PadProbeReturn {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_pad_probe_return_get_type()) }
    }
}

impl glib::value::ValueType for PadProbeReturn {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for PadProbeReturn {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for PadProbeReturn {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// The different parsing errors that can occur.
#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstParseError")]
pub enum ParseError {
    /// A syntax error occurred.
    #[doc(alias = "GST_PARSE_ERROR_SYNTAX")]
    Syntax,
    /// The description contained an unknown element
    #[doc(alias = "GST_PARSE_ERROR_NO_SUCH_ELEMENT")]
    NoSuchElement,
    /// An element did not have a specified property
    #[doc(alias = "GST_PARSE_ERROR_NO_SUCH_PROPERTY")]
    NoSuchProperty,
    /// There was an error linking two pads.
    #[doc(alias = "GST_PARSE_ERROR_LINK")]
    Link,
    /// There was an error setting a property
    #[doc(alias = "GST_PARSE_ERROR_COULD_NOT_SET_PROPERTY")]
    CouldNotSetProperty,
    /// An empty bin was specified.
    #[doc(alias = "GST_PARSE_ERROR_EMPTY_BIN")]
    EmptyBin,
    /// An empty description was specified
    #[doc(alias = "GST_PARSE_ERROR_EMPTY")]
    Empty,
    /// A delayed link did not get resolved.
    #[doc(alias = "GST_PARSE_ERROR_DELAYED_LINK")]
    DelayedLink,
    #[doc(hidden)]
    __Unknown(i32),
}

#[doc(hidden)]
impl IntoGlib for ParseError {
    type GlibType = ffi::GstParseError;

    fn into_glib(self) -> ffi::GstParseError {
        match self {
            Self::Syntax => ffi::GST_PARSE_ERROR_SYNTAX,
            Self::NoSuchElement => ffi::GST_PARSE_ERROR_NO_SUCH_ELEMENT,
            Self::NoSuchProperty => ffi::GST_PARSE_ERROR_NO_SUCH_PROPERTY,
            Self::Link => ffi::GST_PARSE_ERROR_LINK,
            Self::CouldNotSetProperty => ffi::GST_PARSE_ERROR_COULD_NOT_SET_PROPERTY,
            Self::EmptyBin => ffi::GST_PARSE_ERROR_EMPTY_BIN,
            Self::Empty => ffi::GST_PARSE_ERROR_EMPTY,
            Self::DelayedLink => ffi::GST_PARSE_ERROR_DELAYED_LINK,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstParseError> for ParseError {
    unsafe fn from_glib(value: ffi::GstParseError) -> Self {
        skip_assert_initialized!();
        match value {
            0 => Self::Syntax,
            1 => Self::NoSuchElement,
            2 => Self::NoSuchProperty,
            3 => Self::Link,
            4 => Self::CouldNotSetProperty,
            5 => Self::EmptyBin,
            6 => Self::Empty,
            7 => Self::DelayedLink,
            value => Self::__Unknown(value),
        }
    }
}

impl ErrorDomain for ParseError {
    fn domain() -> Quark {
        skip_assert_initialized!();

        unsafe { from_glib(ffi::gst_parse_error_quark()) }
    }

    fn code(self) -> i32 {
        self.into_glib()
    }

    fn from(code: i32) -> Option<Self> {
        skip_assert_initialized!();
        match code {
            0 => Some(Self::Syntax),
            1 => Some(Self::NoSuchElement),
            2 => Some(Self::NoSuchProperty),
            3 => Some(Self::Link),
            4 => Some(Self::CouldNotSetProperty),
            5 => Some(Self::EmptyBin),
            6 => Some(Self::Empty),
            7 => Some(Self::DelayedLink),
            value => Some(Self::__Unknown(value)),
        }
    }
}

impl StaticType for ParseError {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_parse_error_get_type()) }
    }
}

impl glib::value::ValueType for ParseError {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for ParseError {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for ParseError {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// The plugin loading errors
#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstPluginError")]
pub enum PluginError {
    /// The plugin could not be loaded
    #[doc(alias = "GST_PLUGIN_ERROR_MODULE")]
    Module,
    /// The plugin has unresolved dependencies
    #[doc(alias = "GST_PLUGIN_ERROR_DEPENDENCIES")]
    Dependencies,
    /// The plugin has already be loaded from a different file
    #[doc(alias = "GST_PLUGIN_ERROR_NAME_MISMATCH")]
    NameMismatch,
    #[doc(hidden)]
    __Unknown(i32),
}

#[doc(hidden)]
impl IntoGlib for PluginError {
    type GlibType = ffi::GstPluginError;

    fn into_glib(self) -> ffi::GstPluginError {
        match self {
            Self::Module => ffi::GST_PLUGIN_ERROR_MODULE,
            Self::Dependencies => ffi::GST_PLUGIN_ERROR_DEPENDENCIES,
            Self::NameMismatch => ffi::GST_PLUGIN_ERROR_NAME_MISMATCH,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstPluginError> for PluginError {
    unsafe fn from_glib(value: ffi::GstPluginError) -> Self {
        skip_assert_initialized!();
        match value {
            0 => Self::Module,
            1 => Self::Dependencies,
            2 => Self::NameMismatch,
            value => Self::__Unknown(value),
        }
    }
}

impl ErrorDomain for PluginError {
    fn domain() -> Quark {
        skip_assert_initialized!();

        unsafe { from_glib(ffi::gst_plugin_error_quark()) }
    }

    fn code(self) -> i32 {
        self.into_glib()
    }

    fn from(code: i32) -> Option<Self> {
        skip_assert_initialized!();
        match code {
            0 => Some(Self::Module),
            1 => Some(Self::Dependencies),
            2 => Some(Self::NameMismatch),
            value => Some(Self::__Unknown(value)),
        }
    }
}

impl StaticType for PluginError {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_plugin_error_get_type()) }
    }
}

impl glib::value::ValueType for PluginError {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for PluginError {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for PluginError {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// The type of a [`crate::MessageType::Progress`]. The progress messages inform the
/// application of the status of asynchronous tasks.
#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstProgressType")]
pub enum ProgressType {
    /// A new task started.
    #[doc(alias = "GST_PROGRESS_TYPE_START")]
    Start,
    /// A task completed and a new one continues.
    #[doc(alias = "GST_PROGRESS_TYPE_CONTINUE")]
    Continue,
    /// A task completed.
    #[doc(alias = "GST_PROGRESS_TYPE_COMPLETE")]
    Complete,
    /// A task was canceled.
    #[doc(alias = "GST_PROGRESS_TYPE_CANCELED")]
    Canceled,
    /// A task caused an error. An error message is also
    ///  posted on the bus.
    #[doc(alias = "GST_PROGRESS_TYPE_ERROR")]
    Error,
    #[doc(hidden)]
    __Unknown(i32),
}

#[doc(hidden)]
impl IntoGlib for ProgressType {
    type GlibType = ffi::GstProgressType;

    fn into_glib(self) -> ffi::GstProgressType {
        match self {
            Self::Start => ffi::GST_PROGRESS_TYPE_START,
            Self::Continue => ffi::GST_PROGRESS_TYPE_CONTINUE,
            Self::Complete => ffi::GST_PROGRESS_TYPE_COMPLETE,
            Self::Canceled => ffi::GST_PROGRESS_TYPE_CANCELED,
            Self::Error => ffi::GST_PROGRESS_TYPE_ERROR,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstProgressType> for ProgressType {
    unsafe fn from_glib(value: ffi::GstProgressType) -> Self {
        skip_assert_initialized!();
        match value {
            0 => Self::Start,
            1 => Self::Continue,
            2 => Self::Complete,
            3 => Self::Canceled,
            4 => Self::Error,
            value => Self::__Unknown(value),
        }
    }
}

impl StaticType for ProgressType {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_progress_type_get_type()) }
    }
}

impl glib::value::ValueType for ProgressType {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for ProgressType {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for ProgressType {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// The result of a [`crate::Promise`]
#[cfg(any(feature = "v1_14", feature = "dox"))]
#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_14")))]
#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstPromiseResult")]
pub enum PromiseResult {
    /// Initial state. Waiting for transition to any
    ///     other state.
    #[doc(alias = "GST_PROMISE_RESULT_PENDING")]
    Pending,
    /// Interrupted by the consumer as it doesn't
    ///     want the value anymore.
    #[doc(alias = "GST_PROMISE_RESULT_INTERRUPTED")]
    Interrupted,
    /// A producer marked a reply
    #[doc(alias = "GST_PROMISE_RESULT_REPLIED")]
    Replied,
    /// The promise expired (the carrying object
    ///     lost all refs) and the promise will never be fulfilled.
    #[doc(alias = "GST_PROMISE_RESULT_EXPIRED")]
    Expired,
    #[doc(hidden)]
    __Unknown(i32),
}

#[cfg(any(feature = "v1_14", feature = "dox"))]
#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_14")))]
#[doc(hidden)]
impl IntoGlib for PromiseResult {
    type GlibType = ffi::GstPromiseResult;

    fn into_glib(self) -> ffi::GstPromiseResult {
        match self {
            Self::Pending => ffi::GST_PROMISE_RESULT_PENDING,
            Self::Interrupted => ffi::GST_PROMISE_RESULT_INTERRUPTED,
            Self::Replied => ffi::GST_PROMISE_RESULT_REPLIED,
            Self::Expired => ffi::GST_PROMISE_RESULT_EXPIRED,
            Self::__Unknown(value) => value,
        }
    }
}

#[cfg(any(feature = "v1_14", feature = "dox"))]
#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_14")))]
#[doc(hidden)]
impl FromGlib<ffi::GstPromiseResult> for PromiseResult {
    unsafe fn from_glib(value: ffi::GstPromiseResult) -> Self {
        skip_assert_initialized!();
        match value {
            0 => Self::Pending,
            1 => Self::Interrupted,
            2 => Self::Replied,
            3 => Self::Expired,
            value => Self::__Unknown(value),
        }
    }
}

#[cfg(any(feature = "v1_14", feature = "dox"))]
#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_14")))]
impl StaticType for PromiseResult {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_promise_result_get_type()) }
    }
}

#[cfg(any(feature = "v1_14", feature = "dox"))]
#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_14")))]
impl glib::value::ValueType for PromiseResult {
    type Type = Self;
}

#[cfg(any(feature = "v1_14", feature = "dox"))]
#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_14")))]
unsafe impl<'a> FromValue<'a> for PromiseResult {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

#[cfg(any(feature = "v1_14", feature = "dox"))]
#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_14")))]
impl ToValue for PromiseResult {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// The different types of QoS events that can be given to the
/// [`crate::Event::new_qos()`] method.
#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstQOSType")]
pub enum QOSType {
    /// The QoS event type that is produced when upstream
    ///  elements are producing data too quickly and the element can't keep up
    ///  processing the data. Upstream should reduce their production rate. This
    ///  type is also used when buffers arrive early or in time.
    #[doc(alias = "GST_QOS_TYPE_OVERFLOW")]
    Overflow,
    /// The QoS event type that is produced when upstream
    ///  elements are producing data too slowly and need to speed up their
    ///  production rate.
    #[doc(alias = "GST_QOS_TYPE_UNDERFLOW")]
    Underflow,
    /// The QoS event type that is produced when the
    ///  application enabled throttling to limit the data rate.
    #[doc(alias = "GST_QOS_TYPE_THROTTLE")]
    Throttle,
    #[doc(hidden)]
    __Unknown(i32),
}

#[doc(hidden)]
impl IntoGlib for QOSType {
    type GlibType = ffi::GstQOSType;

    fn into_glib(self) -> ffi::GstQOSType {
        match self {
            Self::Overflow => ffi::GST_QOS_TYPE_OVERFLOW,
            Self::Underflow => ffi::GST_QOS_TYPE_UNDERFLOW,
            Self::Throttle => ffi::GST_QOS_TYPE_THROTTLE,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstQOSType> for QOSType {
    unsafe fn from_glib(value: ffi::GstQOSType) -> Self {
        skip_assert_initialized!();
        match value {
            0 => Self::Overflow,
            1 => Self::Underflow,
            2 => Self::Throttle,
            value => Self::__Unknown(value),
        }
    }
}

impl StaticType for QOSType {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_qos_type_get_type()) }
    }
}

impl glib::value::ValueType for QOSType {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for QOSType {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for QOSType {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// Element priority ranks. Defines the order in which the autoplugger (or
/// similar rank-picking mechanisms, such as e.g. [`crate::Element::make_from_uri()`])
/// will choose this element over an alternative one with the same function.
///
/// These constants serve as a rough guidance for defining the rank of a
/// [`crate::PluginFeature`]. Any value is valid, including values bigger than
/// [`Self::Primary`].
#[derive(Debug, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstRank")]
pub enum Rank {
    /// will be chosen last or not at all
    #[doc(alias = "GST_RANK_NONE")]
    None,
    /// unlikely to be chosen
    #[doc(alias = "GST_RANK_MARGINAL")]
    Marginal,
    /// likely to be chosen
    #[doc(alias = "GST_RANK_SECONDARY")]
    Secondary,
    /// will be chosen first
    #[doc(alias = "GST_RANK_PRIMARY")]
    Primary,
    #[doc(hidden)]
    __Unknown(i32),
}

#[doc(hidden)]
impl IntoGlib for Rank {
    type GlibType = ffi::GstRank;

    fn into_glib(self) -> ffi::GstRank {
        match self {
            Self::None => ffi::GST_RANK_NONE,
            Self::Marginal => ffi::GST_RANK_MARGINAL,
            Self::Secondary => ffi::GST_RANK_SECONDARY,
            Self::Primary => ffi::GST_RANK_PRIMARY,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstRank> for Rank {
    unsafe fn from_glib(value: ffi::GstRank) -> Self {
        skip_assert_initialized!();
        match value {
            0 => Self::None,
            64 => Self::Marginal,
            128 => Self::Secondary,
            256 => Self::Primary,
            value => Self::__Unknown(value),
        }
    }
}

impl StaticType for Rank {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_rank_get_type()) }
    }
}

impl glib::value::ValueType for Rank {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for Rank {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for Rank {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// Resource errors are for any resource used by an element:
/// memory, files, network connections, process space, ...
/// They're typically used by source and sink elements.
#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstResourceError")]
pub enum ResourceError {
    /// a general error which doesn't fit in any other
    /// category. Make sure you add a custom message to the error call.
    #[doc(alias = "GST_RESOURCE_ERROR_FAILED")]
    Failed,
    /// do not use this except as a placeholder for
    /// deciding where to go while developing code.
    #[doc(alias = "GST_RESOURCE_ERROR_TOO_LAZY")]
    TooLazy,
    /// used when the resource could not be found.
    #[doc(alias = "GST_RESOURCE_ERROR_NOT_FOUND")]
    NotFound,
    /// used when resource is busy.
    #[doc(alias = "GST_RESOURCE_ERROR_BUSY")]
    Busy,
    /// used when resource fails to open for reading.
    #[doc(alias = "GST_RESOURCE_ERROR_OPEN_READ")]
    OpenRead,
    /// used when resource fails to open for writing.
    #[doc(alias = "GST_RESOURCE_ERROR_OPEN_WRITE")]
    OpenWrite,
    /// used when resource cannot be opened for
    /// both reading and writing, or either (but unspecified which).
    #[doc(alias = "GST_RESOURCE_ERROR_OPEN_READ_WRITE")]
    OpenReadWrite,
    /// used when the resource can't be closed.
    #[doc(alias = "GST_RESOURCE_ERROR_CLOSE")]
    Close,
    /// used when the resource can't be read from.
    #[doc(alias = "GST_RESOURCE_ERROR_READ")]
    Read,
    /// used when the resource can't be written to.
    #[doc(alias = "GST_RESOURCE_ERROR_WRITE")]
    Write,
    /// used when a seek on the resource fails.
    #[doc(alias = "GST_RESOURCE_ERROR_SEEK")]
    Seek,
    /// used when a synchronize on the resource fails.
    #[doc(alias = "GST_RESOURCE_ERROR_SYNC")]
    Sync,
    /// used when settings can't be manipulated on.
    #[doc(alias = "GST_RESOURCE_ERROR_SETTINGS")]
    Settings,
    /// used when the resource has no space left.
    #[doc(alias = "GST_RESOURCE_ERROR_NO_SPACE_LEFT")]
    NoSpaceLeft,
    /// used when the resource can't be opened
    ///  due to missing authorization.
    ///  (Since: 1.2.4)
    #[doc(alias = "GST_RESOURCE_ERROR_NOT_AUTHORIZED")]
    NotAuthorized,
    /// the number of resource error types.
    #[doc(alias = "GST_RESOURCE_ERROR_NUM_ERRORS")]
    NumErrors,
    #[doc(hidden)]
    __Unknown(i32),
}

#[doc(hidden)]
impl IntoGlib for ResourceError {
    type GlibType = ffi::GstResourceError;

    fn into_glib(self) -> ffi::GstResourceError {
        match self {
            Self::Failed => ffi::GST_RESOURCE_ERROR_FAILED,
            Self::TooLazy => ffi::GST_RESOURCE_ERROR_TOO_LAZY,
            Self::NotFound => ffi::GST_RESOURCE_ERROR_NOT_FOUND,
            Self::Busy => ffi::GST_RESOURCE_ERROR_BUSY,
            Self::OpenRead => ffi::GST_RESOURCE_ERROR_OPEN_READ,
            Self::OpenWrite => ffi::GST_RESOURCE_ERROR_OPEN_WRITE,
            Self::OpenReadWrite => ffi::GST_RESOURCE_ERROR_OPEN_READ_WRITE,
            Self::Close => ffi::GST_RESOURCE_ERROR_CLOSE,
            Self::Read => ffi::GST_RESOURCE_ERROR_READ,
            Self::Write => ffi::GST_RESOURCE_ERROR_WRITE,
            Self::Seek => ffi::GST_RESOURCE_ERROR_SEEK,
            Self::Sync => ffi::GST_RESOURCE_ERROR_SYNC,
            Self::Settings => ffi::GST_RESOURCE_ERROR_SETTINGS,
            Self::NoSpaceLeft => ffi::GST_RESOURCE_ERROR_NO_SPACE_LEFT,
            Self::NotAuthorized => ffi::GST_RESOURCE_ERROR_NOT_AUTHORIZED,
            Self::NumErrors => ffi::GST_RESOURCE_ERROR_NUM_ERRORS,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstResourceError> for ResourceError {
    unsafe fn from_glib(value: ffi::GstResourceError) -> Self {
        skip_assert_initialized!();
        match value {
            1 => Self::Failed,
            2 => Self::TooLazy,
            3 => Self::NotFound,
            4 => Self::Busy,
            5 => Self::OpenRead,
            6 => Self::OpenWrite,
            7 => Self::OpenReadWrite,
            8 => Self::Close,
            9 => Self::Read,
            10 => Self::Write,
            11 => Self::Seek,
            12 => Self::Sync,
            13 => Self::Settings,
            14 => Self::NoSpaceLeft,
            15 => Self::NotAuthorized,
            16 => Self::NumErrors,
            value => Self::__Unknown(value),
        }
    }
}

impl ErrorDomain for ResourceError {
    fn domain() -> Quark {
        skip_assert_initialized!();

        unsafe { from_glib(ffi::gst_resource_error_quark()) }
    }

    fn code(self) -> i32 {
        self.into_glib()
    }

    fn from(code: i32) -> Option<Self> {
        skip_assert_initialized!();
        match code {
            1 => Some(Self::Failed),
            2 => Some(Self::TooLazy),
            3 => Some(Self::NotFound),
            4 => Some(Self::Busy),
            5 => Some(Self::OpenRead),
            6 => Some(Self::OpenWrite),
            7 => Some(Self::OpenReadWrite),
            8 => Some(Self::Close),
            9 => Some(Self::Read),
            10 => Some(Self::Write),
            11 => Some(Self::Seek),
            12 => Some(Self::Sync),
            13 => Some(Self::Settings),
            14 => Some(Self::NoSpaceLeft),
            15 => Some(Self::NotAuthorized),
            16 => Some(Self::NumErrors),
            _ => Some(Self::Failed),
        }
    }
}

impl StaticType for ResourceError {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_resource_error_get_type()) }
    }
}

impl glib::value::ValueType for ResourceError {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for ResourceError {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for ResourceError {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// The different types of seek events. When constructing a seek event with
/// [`crate::Event::new_seek()`] or when doing gst_segment_do_seek ().
#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstSeekType")]
pub enum SeekType {
    /// no change in position is required
    #[doc(alias = "GST_SEEK_TYPE_NONE")]
    None,
    /// absolute position is requested
    #[doc(alias = "GST_SEEK_TYPE_SET")]
    Set,
    /// relative position to duration is requested
    #[doc(alias = "GST_SEEK_TYPE_END")]
    End,
    #[doc(hidden)]
    __Unknown(i32),
}

#[doc(hidden)]
impl IntoGlib for SeekType {
    type GlibType = ffi::GstSeekType;

    fn into_glib(self) -> ffi::GstSeekType {
        match self {
            Self::None => ffi::GST_SEEK_TYPE_NONE,
            Self::Set => ffi::GST_SEEK_TYPE_SET,
            Self::End => ffi::GST_SEEK_TYPE_END,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstSeekType> for SeekType {
    unsafe fn from_glib(value: ffi::GstSeekType) -> Self {
        skip_assert_initialized!();
        match value {
            0 => Self::None,
            1 => Self::Set,
            2 => Self::End,
            value => Self::__Unknown(value),
        }
    }
}

impl StaticType for SeekType {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_seek_type_get_type()) }
    }
}

impl glib::value::ValueType for SeekType {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for SeekType {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for SeekType {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// The possible states an element can be in. States can be changed using
/// [`crate::prelude::ElementExt::set_state()`] and checked using [`crate::prelude::ElementExt::get_state()`].
#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstState")]
pub enum State {
    /// no pending state.
    #[doc(alias = "GST_STATE_VOID_PENDING")]
    VoidPending,
    /// the NULL state or initial state of an element.
    #[doc(alias = "GST_STATE_NULL")]
    Null,
    /// the element is ready to go to PAUSED.
    #[doc(alias = "GST_STATE_READY")]
    Ready,
    /// the element is PAUSED, it is ready to accept and
    ///  process data. Sink elements however only accept one
    ///  buffer and then block.
    #[doc(alias = "GST_STATE_PAUSED")]
    Paused,
    /// the element is PLAYING, the [`crate::Clock`] is running and
    ///  the data is flowing.
    #[doc(alias = "GST_STATE_PLAYING")]
    Playing,
    #[doc(hidden)]
    __Unknown(i32),
}

#[doc(hidden)]
impl IntoGlib for State {
    type GlibType = ffi::GstState;

    fn into_glib(self) -> ffi::GstState {
        match self {
            Self::VoidPending => ffi::GST_STATE_VOID_PENDING,
            Self::Null => ffi::GST_STATE_NULL,
            Self::Ready => ffi::GST_STATE_READY,
            Self::Paused => ffi::GST_STATE_PAUSED,
            Self::Playing => ffi::GST_STATE_PLAYING,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstState> for State {
    unsafe fn from_glib(value: ffi::GstState) -> Self {
        skip_assert_initialized!();
        match value {
            0 => Self::VoidPending,
            1 => Self::Null,
            2 => Self::Ready,
            3 => Self::Paused,
            4 => Self::Playing,
            value => Self::__Unknown(value),
        }
    }
}

impl StaticType for State {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_state_get_type()) }
    }
}

impl glib::value::ValueType for State {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for State {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for State {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// These are the different state changes an element goes through.
/// [`crate::State::Null`] &rArr; [`crate::State::Playing`] is called an upwards state change
/// and [`crate::State::Playing`] &rArr; [`crate::State::Null`] a downwards state change.
#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstStateChange")]
pub enum StateChange {
    /// state change from NULL to READY.
    ///  * The element must check if the resources it needs are available. Device
    ///  sinks and -sources typically try to probe the device to constrain their
    ///  caps.
    ///  * The element opens the device (in case feature need to be probed).
    #[doc(alias = "GST_STATE_CHANGE_NULL_TO_READY")]
    NullToReady,
    /// state change from READY to PAUSED.
    ///  * The element pads are activated in order to receive data in PAUSED.
    ///  Streaming threads are started.
    ///  * Some elements might need to return [`crate::StateChangeReturn::Async`] and complete
    ///  the state change when they have enough information. It is a requirement
    ///  for sinks to return [`crate::StateChangeReturn::Async`] and complete the state change
    ///  when they receive the first buffer or [`crate::EventType::Eos`] (preroll).
    ///  Sinks also block the dataflow when in PAUSED.
    ///  * A pipeline resets the running_time to 0.
    ///  * Live sources return [`crate::StateChangeReturn::NoPreroll`] and don't generate data.
    #[doc(alias = "GST_STATE_CHANGE_READY_TO_PAUSED")]
    ReadyToPaused,
    /// state change from PAUSED to PLAYING.
    ///  * Most elements ignore this state change.
    ///  * The pipeline selects a [`crate::Clock`] and distributes this to all the children
    ///  before setting them to PLAYING. This means that it is only allowed to
    ///  synchronize on the [`crate::Clock`] in the PLAYING state.
    ///  * The pipeline uses the [`crate::Clock`] and the running_time to calculate the
    ///  base_time. The base_time is distributed to all children when performing
    ///  the state change.
    ///  * Sink elements stop blocking on the preroll buffer or event and start
    ///  rendering the data.
    ///  * Sinks can post [`crate::MessageType::Eos`] in the PLAYING state. It is not allowed
    ///  to post [`crate::MessageType::Eos`] when not in the PLAYING state.
    ///  * While streaming in PAUSED or PLAYING elements can create and remove
    ///  sometimes pads.
    ///  * Live sources start generating data and return [`crate::StateChangeReturn::Success`].
    #[doc(alias = "GST_STATE_CHANGE_PAUSED_TO_PLAYING")]
    PausedToPlaying,
    /// state change from PLAYING to PAUSED.
    ///  * Most elements ignore this state change.
    ///  * The pipeline calculates the running_time based on the last selected
    ///  [`crate::Clock`] and the base_time. It stores this information to continue
    ///  playback when going back to the PLAYING state.
    ///  * Sinks unblock any [`crate::Clock`] wait calls.
    ///  * When a sink does not have a pending buffer to play, it returns
    ///  [`crate::StateChangeReturn::Async`] from this state change and completes the state
    ///  change when it receives a new buffer or an [`crate::EventType::Eos`].
    ///  * Any queued [`crate::MessageType::Eos`] items are removed since they will be reposted
    ///  when going back to the PLAYING state. The EOS messages are queued in
    ///  [`crate::Bin`] containers.
    ///  * Live sources stop generating data and return [`crate::StateChangeReturn::NoPreroll`].
    #[doc(alias = "GST_STATE_CHANGE_PLAYING_TO_PAUSED")]
    PlayingToPaused,
    /// state change from PAUSED to READY.
    ///  * Sinks unblock any waits in the preroll.
    ///  * Elements unblock any waits on devices
    ///  * Chain or get_range functions return [`crate::FlowReturn::Flushing`].
    ///  * The element pads are deactivated so that streaming becomes impossible and
    ///  all streaming threads are stopped.
    ///  * The sink forgets all negotiated formats
    ///  * Elements remove all sometimes pads
    #[doc(alias = "GST_STATE_CHANGE_PAUSED_TO_READY")]
    PausedToReady,
    /// state change from READY to NULL.
    ///  * Elements close devices
    ///  * Elements reset any internal state.
    #[doc(alias = "GST_STATE_CHANGE_READY_TO_NULL")]
    ReadyToNull,
    /// state change from NULL to NULL. (Since: 1.14)
    #[doc(alias = "GST_STATE_CHANGE_NULL_TO_NULL")]
    NullToNull,
    /// state change from READY to READY,
    /// This might happen when going to PAUSED asynchronously failed, in that case
    /// elements should make sure they are in a proper, coherent READY state. (Since: 1.14)
    #[doc(alias = "GST_STATE_CHANGE_READY_TO_READY")]
    ReadyToReady,
    /// state change from PAUSED to PAUSED.
    /// This might happen when elements were in PLAYING state and 'lost state',
    /// they should make sure to go back to real 'PAUSED' state (prerolling for example). (Since: 1.14)
    #[doc(alias = "GST_STATE_CHANGE_PAUSED_TO_PAUSED")]
    PausedToPaused,
    /// state change from PLAYING to PLAYING. (Since: 1.14)
    #[doc(alias = "GST_STATE_CHANGE_PLAYING_TO_PLAYING")]
    PlayingToPlaying,
    #[doc(hidden)]
    __Unknown(i32),
}

impl fmt::Display for StateChange {
    #[inline]
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        f.write_str(&self.name())
    }
}

#[doc(hidden)]
impl IntoGlib for StateChange {
    type GlibType = ffi::GstStateChange;

    fn into_glib(self) -> ffi::GstStateChange {
        match self {
            Self::NullToReady => ffi::GST_STATE_CHANGE_NULL_TO_READY,
            Self::ReadyToPaused => ffi::GST_STATE_CHANGE_READY_TO_PAUSED,
            Self::PausedToPlaying => ffi::GST_STATE_CHANGE_PAUSED_TO_PLAYING,
            Self::PlayingToPaused => ffi::GST_STATE_CHANGE_PLAYING_TO_PAUSED,
            Self::PausedToReady => ffi::GST_STATE_CHANGE_PAUSED_TO_READY,
            Self::ReadyToNull => ffi::GST_STATE_CHANGE_READY_TO_NULL,
            Self::NullToNull => ffi::GST_STATE_CHANGE_NULL_TO_NULL,
            Self::ReadyToReady => ffi::GST_STATE_CHANGE_READY_TO_READY,
            Self::PausedToPaused => ffi::GST_STATE_CHANGE_PAUSED_TO_PAUSED,
            Self::PlayingToPlaying => ffi::GST_STATE_CHANGE_PLAYING_TO_PLAYING,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstStateChange> for StateChange {
    unsafe fn from_glib(value: ffi::GstStateChange) -> Self {
        skip_assert_initialized!();
        match value {
            10 => Self::NullToReady,
            19 => Self::ReadyToPaused,
            28 => Self::PausedToPlaying,
            35 => Self::PlayingToPaused,
            26 => Self::PausedToReady,
            17 => Self::ReadyToNull,
            9 => Self::NullToNull,
            18 => Self::ReadyToReady,
            27 => Self::PausedToPaused,
            36 => Self::PlayingToPlaying,
            value => Self::__Unknown(value),
        }
    }
}

impl StaticType for StateChange {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_state_change_get_type()) }
    }
}

impl glib::value::ValueType for StateChange {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for StateChange {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for StateChange {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// The possible return values from a state change function such as
/// [`crate::prelude::ElementExt::set_state()`]. Only [`Self::Failure`] is a real failure.
#[must_use]
#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstStateChangeReturn")]
pub enum StateChangeReturn {
    /// the state change failed
    #[doc(alias = "GST_STATE_CHANGE_FAILURE")]
    Failure,
    /// the state change succeeded
    #[doc(alias = "GST_STATE_CHANGE_SUCCESS")]
    Success,
    /// the state change will happen asynchronously
    #[doc(alias = "GST_STATE_CHANGE_ASYNC")]
    Async,
    /// the state change succeeded but the element
    ///  cannot produce data in [`crate::State::Paused`].
    ///  This typically happens with live sources.
    #[doc(alias = "GST_STATE_CHANGE_NO_PREROLL")]
    NoPreroll,
    #[doc(hidden)]
    __Unknown(i32),
}

#[doc(hidden)]
impl IntoGlib for StateChangeReturn {
    type GlibType = ffi::GstStateChangeReturn;

    fn into_glib(self) -> ffi::GstStateChangeReturn {
        match self {
            Self::Failure => ffi::GST_STATE_CHANGE_FAILURE,
            Self::Success => ffi::GST_STATE_CHANGE_SUCCESS,
            Self::Async => ffi::GST_STATE_CHANGE_ASYNC,
            Self::NoPreroll => ffi::GST_STATE_CHANGE_NO_PREROLL,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstStateChangeReturn> for StateChangeReturn {
    unsafe fn from_glib(value: ffi::GstStateChangeReturn) -> Self {
        skip_assert_initialized!();
        match value {
            0 => Self::Failure,
            1 => Self::Success,
            2 => Self::Async,
            3 => Self::NoPreroll,
            value => Self::__Unknown(value),
        }
    }
}

impl StaticType for StateChangeReturn {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_state_change_return_get_type()) }
    }
}

impl glib::value::ValueType for StateChangeReturn {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for StateChangeReturn {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for StateChangeReturn {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// Stream errors are for anything related to the stream being processed:
/// format errors, media type errors, ...
/// They're typically used by decoders, demuxers, converters, ...
#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstStreamError")]
pub enum StreamError {
    /// a general error which doesn't fit in any other
    /// category. Make sure you add a custom message to the error call.
    #[doc(alias = "GST_STREAM_ERROR_FAILED")]
    Failed,
    /// do not use this except as a placeholder for
    /// deciding where to go while developing code.
    #[doc(alias = "GST_STREAM_ERROR_TOO_LAZY")]
    TooLazy,
    /// use this when you do not want to implement
    /// this functionality yet.
    #[doc(alias = "GST_STREAM_ERROR_NOT_IMPLEMENTED")]
    NotImplemented,
    /// used when the element doesn't know the
    /// stream's type.
    #[doc(alias = "GST_STREAM_ERROR_TYPE_NOT_FOUND")]
    TypeNotFound,
    /// used when the element doesn't handle this type
    /// of stream.
    #[doc(alias = "GST_STREAM_ERROR_WRONG_TYPE")]
    WrongType,
    /// used when there's no codec to handle the
    /// stream's type.
    #[doc(alias = "GST_STREAM_ERROR_CODEC_NOT_FOUND")]
    CodecNotFound,
    /// used when decoding fails.
    #[doc(alias = "GST_STREAM_ERROR_DECODE")]
    Decode,
    /// used when encoding fails.
    #[doc(alias = "GST_STREAM_ERROR_ENCODE")]
    Encode,
    /// used when demuxing fails.
    #[doc(alias = "GST_STREAM_ERROR_DEMUX")]
    Demux,
    /// used when muxing fails.
    #[doc(alias = "GST_STREAM_ERROR_MUX")]
    Mux,
    /// used when the stream is of the wrong format
    /// (for example, wrong caps).
    #[doc(alias = "GST_STREAM_ERROR_FORMAT")]
    Format,
    /// used when the stream is encrypted and can't be
    /// decrypted because this is not supported by the element.
    #[doc(alias = "GST_STREAM_ERROR_DECRYPT")]
    Decrypt,
    /// used when the stream is encrypted and
    /// can't be decrypted because no suitable key is available.
    #[doc(alias = "GST_STREAM_ERROR_DECRYPT_NOKEY")]
    DecryptNokey,
    /// the number of stream error types.
    #[doc(alias = "GST_STREAM_ERROR_NUM_ERRORS")]
    NumErrors,
    #[doc(hidden)]
    __Unknown(i32),
}

#[doc(hidden)]
impl IntoGlib for StreamError {
    type GlibType = ffi::GstStreamError;

    fn into_glib(self) -> ffi::GstStreamError {
        match self {
            Self::Failed => ffi::GST_STREAM_ERROR_FAILED,
            Self::TooLazy => ffi::GST_STREAM_ERROR_TOO_LAZY,
            Self::NotImplemented => ffi::GST_STREAM_ERROR_NOT_IMPLEMENTED,
            Self::TypeNotFound => ffi::GST_STREAM_ERROR_TYPE_NOT_FOUND,
            Self::WrongType => ffi::GST_STREAM_ERROR_WRONG_TYPE,
            Self::CodecNotFound => ffi::GST_STREAM_ERROR_CODEC_NOT_FOUND,
            Self::Decode => ffi::GST_STREAM_ERROR_DECODE,
            Self::Encode => ffi::GST_STREAM_ERROR_ENCODE,
            Self::Demux => ffi::GST_STREAM_ERROR_DEMUX,
            Self::Mux => ffi::GST_STREAM_ERROR_MUX,
            Self::Format => ffi::GST_STREAM_ERROR_FORMAT,
            Self::Decrypt => ffi::GST_STREAM_ERROR_DECRYPT,
            Self::DecryptNokey => ffi::GST_STREAM_ERROR_DECRYPT_NOKEY,
            Self::NumErrors => ffi::GST_STREAM_ERROR_NUM_ERRORS,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstStreamError> for StreamError {
    unsafe fn from_glib(value: ffi::GstStreamError) -> Self {
        skip_assert_initialized!();
        match value {
            1 => Self::Failed,
            2 => Self::TooLazy,
            3 => Self::NotImplemented,
            4 => Self::TypeNotFound,
            5 => Self::WrongType,
            6 => Self::CodecNotFound,
            7 => Self::Decode,
            8 => Self::Encode,
            9 => Self::Demux,
            10 => Self::Mux,
            11 => Self::Format,
            12 => Self::Decrypt,
            13 => Self::DecryptNokey,
            14 => Self::NumErrors,
            value => Self::__Unknown(value),
        }
    }
}

impl ErrorDomain for StreamError {
    fn domain() -> Quark {
        skip_assert_initialized!();

        unsafe { from_glib(ffi::gst_stream_error_quark()) }
    }

    fn code(self) -> i32 {
        self.into_glib()
    }

    fn from(code: i32) -> Option<Self> {
        skip_assert_initialized!();
        match code {
            1 => Some(Self::Failed),
            2 => Some(Self::TooLazy),
            3 => Some(Self::NotImplemented),
            4 => Some(Self::TypeNotFound),
            5 => Some(Self::WrongType),
            6 => Some(Self::CodecNotFound),
            7 => Some(Self::Decode),
            8 => Some(Self::Encode),
            9 => Some(Self::Demux),
            10 => Some(Self::Mux),
            11 => Some(Self::Format),
            12 => Some(Self::Decrypt),
            13 => Some(Self::DecryptNokey),
            14 => Some(Self::NumErrors),
            _ => Some(Self::Failed),
        }
    }
}

impl StaticType for StreamError {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_stream_error_get_type()) }
    }
}

impl glib::value::ValueType for StreamError {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for StreamError {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for StreamError {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// The type of a [`crate::MessageType::StreamStatus`]. The stream status messages inform the
/// application of new streaming threads and their status.
#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstStreamStatusType")]
pub enum StreamStatusType {
    /// A new thread need to be created.
    #[doc(alias = "GST_STREAM_STATUS_TYPE_CREATE")]
    Create,
    /// a thread entered its loop function
    #[doc(alias = "GST_STREAM_STATUS_TYPE_ENTER")]
    Enter,
    /// a thread left its loop function
    #[doc(alias = "GST_STREAM_STATUS_TYPE_LEAVE")]
    Leave,
    /// a thread is destroyed
    #[doc(alias = "GST_STREAM_STATUS_TYPE_DESTROY")]
    Destroy,
    /// a thread is started
    #[doc(alias = "GST_STREAM_STATUS_TYPE_START")]
    Start,
    /// a thread is paused
    #[doc(alias = "GST_STREAM_STATUS_TYPE_PAUSE")]
    Pause,
    /// a thread is stopped
    #[doc(alias = "GST_STREAM_STATUS_TYPE_STOP")]
    Stop,
    #[doc(hidden)]
    __Unknown(i32),
}

#[doc(hidden)]
impl IntoGlib for StreamStatusType {
    type GlibType = ffi::GstStreamStatusType;

    fn into_glib(self) -> ffi::GstStreamStatusType {
        match self {
            Self::Create => ffi::GST_STREAM_STATUS_TYPE_CREATE,
            Self::Enter => ffi::GST_STREAM_STATUS_TYPE_ENTER,
            Self::Leave => ffi::GST_STREAM_STATUS_TYPE_LEAVE,
            Self::Destroy => ffi::GST_STREAM_STATUS_TYPE_DESTROY,
            Self::Start => ffi::GST_STREAM_STATUS_TYPE_START,
            Self::Pause => ffi::GST_STREAM_STATUS_TYPE_PAUSE,
            Self::Stop => ffi::GST_STREAM_STATUS_TYPE_STOP,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstStreamStatusType> for StreamStatusType {
    unsafe fn from_glib(value: ffi::GstStreamStatusType) -> Self {
        skip_assert_initialized!();
        match value {
            0 => Self::Create,
            1 => Self::Enter,
            2 => Self::Leave,
            3 => Self::Destroy,
            8 => Self::Start,
            9 => Self::Pause,
            10 => Self::Stop,
            value => Self::__Unknown(value),
        }
    }
}

impl StaticType for StreamStatusType {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_stream_status_type_get_type()) }
    }
}

impl glib::value::ValueType for StreamStatusType {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for StreamStatusType {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for StreamStatusType {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// The type of a [`crate::MessageType::StructureChange`].
#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstStructureChangeType")]
pub enum StructureChangeType {
    /// Pad linking is starting or done.
    #[doc(alias = "GST_STRUCTURE_CHANGE_TYPE_PAD_LINK")]
    Link,
    /// Pad unlinking is starting or done.
    #[doc(alias = "GST_STRUCTURE_CHANGE_TYPE_PAD_UNLINK")]
    Unlink,
    #[doc(hidden)]
    __Unknown(i32),
}

#[doc(hidden)]
impl IntoGlib for StructureChangeType {
    type GlibType = ffi::GstStructureChangeType;

    fn into_glib(self) -> ffi::GstStructureChangeType {
        match self {
            Self::Link => ffi::GST_STRUCTURE_CHANGE_TYPE_PAD_LINK,
            Self::Unlink => ffi::GST_STRUCTURE_CHANGE_TYPE_PAD_UNLINK,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstStructureChangeType> for StructureChangeType {
    unsafe fn from_glib(value: ffi::GstStructureChangeType) -> Self {
        skip_assert_initialized!();
        match value {
            0 => Self::Link,
            1 => Self::Unlink,
            value => Self::__Unknown(value),
        }
    }
}

impl StaticType for StructureChangeType {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_structure_change_type_get_type()) }
    }
}

impl glib::value::ValueType for StructureChangeType {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for StructureChangeType {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for StructureChangeType {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// Extra tag flags used when registering tags.
#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstTagFlag")]
pub enum TagFlag {
    /// undefined flag
    #[doc(alias = "GST_TAG_FLAG_UNDEFINED")]
    Undefined,
    /// tag is meta data
    #[doc(alias = "GST_TAG_FLAG_META")]
    Meta,
    /// tag is encoded
    #[doc(alias = "GST_TAG_FLAG_ENCODED")]
    Encoded,
    /// tag is decoded
    #[doc(alias = "GST_TAG_FLAG_DECODED")]
    Decoded,
    /// number of tag flags
    #[doc(alias = "GST_TAG_FLAG_COUNT")]
    Count,
    #[doc(hidden)]
    __Unknown(i32),
}

#[doc(hidden)]
impl IntoGlib for TagFlag {
    type GlibType = ffi::GstTagFlag;

    fn into_glib(self) -> ffi::GstTagFlag {
        match self {
            Self::Undefined => ffi::GST_TAG_FLAG_UNDEFINED,
            Self::Meta => ffi::GST_TAG_FLAG_META,
            Self::Encoded => ffi::GST_TAG_FLAG_ENCODED,
            Self::Decoded => ffi::GST_TAG_FLAG_DECODED,
            Self::Count => ffi::GST_TAG_FLAG_COUNT,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstTagFlag> for TagFlag {
    unsafe fn from_glib(value: ffi::GstTagFlag) -> Self {
        skip_assert_initialized!();
        match value {
            0 => Self::Undefined,
            1 => Self::Meta,
            2 => Self::Encoded,
            3 => Self::Decoded,
            4 => Self::Count,
            value => Self::__Unknown(value),
        }
    }
}

impl StaticType for TagFlag {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_tag_flag_get_type()) }
    }
}

impl glib::value::ValueType for TagFlag {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for TagFlag {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for TagFlag {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// The different tag merging modes are basically replace, overwrite and append,
/// but they can be seen from two directions. Given two taglists: (A) the tags
/// already in the element and (B) the ones that are supplied to the element (
/// e.g. via [`crate::TagSetter::merge_tags()`] / [`crate::TagSetter::add_tags()`] or a
/// [`crate::EventType::Tag`]), how are these tags merged?
/// In the table below this is shown for the cases that a tag exists in the list
/// (A) or does not exists (!A) and combinations thereof.
///
/// | merge mode | A + B | A + !B | !A + B | !A + !B |
/// | ----------- | ----- | ------ | ------ | ------- |
/// | REPLACE_ALL | B | ø | B | ø |
/// | REPLACE | B | A | B | ø |
/// | APPEND | A, B | A | B | ø |
/// | PREPEND | B, A | A | B | ø |
/// | KEEP | A | A | B | ø |
/// | KEEP_ALL | A | A | ø | ø |
#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstTagMergeMode")]
pub enum TagMergeMode {
    /// undefined merge mode
    #[doc(alias = "GST_TAG_MERGE_UNDEFINED")]
    Undefined,
    /// replace all tags (clear list and append)
    #[doc(alias = "GST_TAG_MERGE_REPLACE_ALL")]
    ReplaceAll,
    /// replace tags
    #[doc(alias = "GST_TAG_MERGE_REPLACE")]
    Replace,
    /// append tags
    #[doc(alias = "GST_TAG_MERGE_APPEND")]
    Append,
    /// prepend tags
    #[doc(alias = "GST_TAG_MERGE_PREPEND")]
    Prepend,
    /// keep existing tags
    #[doc(alias = "GST_TAG_MERGE_KEEP")]
    Keep,
    /// keep all existing tags
    #[doc(alias = "GST_TAG_MERGE_KEEP_ALL")]
    KeepAll,
    /// the number of merge modes
    #[doc(alias = "GST_TAG_MERGE_COUNT")]
    Count,
    #[doc(hidden)]
    __Unknown(i32),
}

#[doc(hidden)]
impl IntoGlib for TagMergeMode {
    type GlibType = ffi::GstTagMergeMode;

    fn into_glib(self) -> ffi::GstTagMergeMode {
        match self {
            Self::Undefined => ffi::GST_TAG_MERGE_UNDEFINED,
            Self::ReplaceAll => ffi::GST_TAG_MERGE_REPLACE_ALL,
            Self::Replace => ffi::GST_TAG_MERGE_REPLACE,
            Self::Append => ffi::GST_TAG_MERGE_APPEND,
            Self::Prepend => ffi::GST_TAG_MERGE_PREPEND,
            Self::Keep => ffi::GST_TAG_MERGE_KEEP,
            Self::KeepAll => ffi::GST_TAG_MERGE_KEEP_ALL,
            Self::Count => ffi::GST_TAG_MERGE_COUNT,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstTagMergeMode> for TagMergeMode {
    unsafe fn from_glib(value: ffi::GstTagMergeMode) -> Self {
        skip_assert_initialized!();
        match value {
            0 => Self::Undefined,
            1 => Self::ReplaceAll,
            2 => Self::Replace,
            3 => Self::Append,
            4 => Self::Prepend,
            5 => Self::Keep,
            6 => Self::KeepAll,
            7 => Self::Count,
            value => Self::__Unknown(value),
        }
    }
}

impl StaticType for TagMergeMode {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_tag_merge_mode_get_type()) }
    }
}

impl glib::value::ValueType for TagMergeMode {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for TagMergeMode {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for TagMergeMode {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// GstTagScope specifies if a taglist applies to the complete
/// medium or only to one single stream.
#[cfg_attr(feature = "ser_de", derive(serde::Serialize, serde::Deserialize))]
#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstTagScope")]
pub enum TagScope {
    /// tags specific to this single stream
    #[doc(alias = "GST_TAG_SCOPE_STREAM")]
    Stream,
    /// global tags for the complete medium
    #[doc(alias = "GST_TAG_SCOPE_GLOBAL")]
    Global,
    #[doc(hidden)]
    __Unknown(i32),
}

#[doc(hidden)]
impl IntoGlib for TagScope {
    type GlibType = ffi::GstTagScope;

    fn into_glib(self) -> ffi::GstTagScope {
        match self {
            Self::Stream => ffi::GST_TAG_SCOPE_STREAM,
            Self::Global => ffi::GST_TAG_SCOPE_GLOBAL,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstTagScope> for TagScope {
    unsafe fn from_glib(value: ffi::GstTagScope) -> Self {
        skip_assert_initialized!();
        match value {
            0 => Self::Stream,
            1 => Self::Global,
            value => Self::__Unknown(value),
        }
    }
}

impl StaticType for TagScope {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_tag_scope_get_type()) }
    }
}

impl glib::value::ValueType for TagScope {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for TagScope {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for TagScope {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// The different states a task can be in
#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstTaskState")]
pub enum TaskState {
    /// the task is started and running
    #[doc(alias = "GST_TASK_STARTED")]
    Started,
    /// the task is stopped
    #[doc(alias = "GST_TASK_STOPPED")]
    Stopped,
    /// the task is paused
    #[doc(alias = "GST_TASK_PAUSED")]
    Paused,
    #[doc(hidden)]
    __Unknown(i32),
}

#[doc(hidden)]
impl IntoGlib for TaskState {
    type GlibType = ffi::GstTaskState;

    fn into_glib(self) -> ffi::GstTaskState {
        match self {
            Self::Started => ffi::GST_TASK_STARTED,
            Self::Stopped => ffi::GST_TASK_STOPPED,
            Self::Paused => ffi::GST_TASK_PAUSED,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstTaskState> for TaskState {
    unsafe fn from_glib(value: ffi::GstTaskState) -> Self {
        skip_assert_initialized!();
        match value {
            0 => Self::Started,
            1 => Self::Stopped,
            2 => Self::Paused,
            value => Self::__Unknown(value),
        }
    }
}

impl StaticType for TaskState {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_task_state_get_type()) }
    }
}

impl glib::value::ValueType for TaskState {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for TaskState {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for TaskState {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// The different types of TOC entries (see [`crate::TocEntry`]).
///
/// There are two types of TOC entries: alternatives or parts in a sequence.
#[cfg_attr(feature = "ser_de", derive(serde::Serialize, serde::Deserialize))]
#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstTocEntryType")]
pub enum TocEntryType {
    /// entry is an angle (i.e. an alternative)
    #[doc(alias = "GST_TOC_ENTRY_TYPE_ANGLE")]
    Angle,
    /// entry is a version (i.e. alternative)
    #[doc(alias = "GST_TOC_ENTRY_TYPE_VERSION")]
    Version,
    /// entry is an edition (i.e. alternative)
    #[doc(alias = "GST_TOC_ENTRY_TYPE_EDITION")]
    Edition,
    /// invalid entry type value
    #[doc(alias = "GST_TOC_ENTRY_TYPE_INVALID")]
    Invalid,
    /// entry is a title (i.e. a part of a sequence)
    #[doc(alias = "GST_TOC_ENTRY_TYPE_TITLE")]
    Title,
    /// entry is a track (i.e. a part of a sequence)
    #[doc(alias = "GST_TOC_ENTRY_TYPE_TRACK")]
    Track,
    /// entry is a chapter (i.e. a part of a sequence)
    #[doc(alias = "GST_TOC_ENTRY_TYPE_CHAPTER")]
    Chapter,
    #[doc(hidden)]
    __Unknown(i32),
}

impl TocEntryType {
    pub fn nick<'a>(self) -> &'a str {
        unsafe {
            CStr::from_ptr(
                ffi::gst_toc_entry_type_get_nick(self.into_glib())
                    .as_ref()
                    .expect("gst_toc_entry_type_get_nick returned NULL"),
            )
            .to_str()
            .expect("gst_toc_entry_type_get_nick returned an invalid string")
        }
    }
}

#[doc(hidden)]
impl IntoGlib for TocEntryType {
    type GlibType = ffi::GstTocEntryType;

    fn into_glib(self) -> ffi::GstTocEntryType {
        match self {
            Self::Angle => ffi::GST_TOC_ENTRY_TYPE_ANGLE,
            Self::Version => ffi::GST_TOC_ENTRY_TYPE_VERSION,
            Self::Edition => ffi::GST_TOC_ENTRY_TYPE_EDITION,
            Self::Invalid => ffi::GST_TOC_ENTRY_TYPE_INVALID,
            Self::Title => ffi::GST_TOC_ENTRY_TYPE_TITLE,
            Self::Track => ffi::GST_TOC_ENTRY_TYPE_TRACK,
            Self::Chapter => ffi::GST_TOC_ENTRY_TYPE_CHAPTER,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstTocEntryType> for TocEntryType {
    unsafe fn from_glib(value: ffi::GstTocEntryType) -> Self {
        skip_assert_initialized!();
        match value {
            -3 => Self::Angle,
            -2 => Self::Version,
            -1 => Self::Edition,
            0 => Self::Invalid,
            1 => Self::Title,
            2 => Self::Track,
            3 => Self::Chapter,
            value => Self::__Unknown(value),
        }
    }
}

impl StaticType for TocEntryType {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_toc_entry_type_get_type()) }
    }
}

impl glib::value::ValueType for TocEntryType {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for TocEntryType {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for TocEntryType {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// How a [`crate::TocEntry`] should be repeated. By default, entries are played a
/// single time.
#[cfg_attr(feature = "ser_de", derive(serde::Serialize, serde::Deserialize))]
#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstTocLoopType")]
pub enum TocLoopType {
    /// single forward playback
    #[doc(alias = "GST_TOC_LOOP_NONE")]
    None,
    /// repeat forward
    #[doc(alias = "GST_TOC_LOOP_FORWARD")]
    Forward,
    /// repeat backward
    #[doc(alias = "GST_TOC_LOOP_REVERSE")]
    Reverse,
    /// repeat forward and backward
    #[doc(alias = "GST_TOC_LOOP_PING_PONG")]
    PingPong,
    #[doc(hidden)]
    __Unknown(i32),
}

#[doc(hidden)]
impl IntoGlib for TocLoopType {
    type GlibType = ffi::GstTocLoopType;

    fn into_glib(self) -> ffi::GstTocLoopType {
        match self {
            Self::None => ffi::GST_TOC_LOOP_NONE,
            Self::Forward => ffi::GST_TOC_LOOP_FORWARD,
            Self::Reverse => ffi::GST_TOC_LOOP_REVERSE,
            Self::PingPong => ffi::GST_TOC_LOOP_PING_PONG,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstTocLoopType> for TocLoopType {
    unsafe fn from_glib(value: ffi::GstTocLoopType) -> Self {
        skip_assert_initialized!();
        match value {
            0 => Self::None,
            1 => Self::Forward,
            2 => Self::Reverse,
            3 => Self::PingPong,
            value => Self::__Unknown(value),
        }
    }
}

impl StaticType for TocLoopType {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_toc_loop_type_get_type()) }
    }
}

impl glib::value::ValueType for TocLoopType {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for TocLoopType {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for TocLoopType {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// The scope of a TOC.
#[cfg_attr(feature = "ser_de", derive(serde::Serialize, serde::Deserialize))]
#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstTocScope")]
pub enum TocScope {
    /// global TOC representing all selectable options
    ///  (this is what applications are usually interested in)
    #[doc(alias = "GST_TOC_SCOPE_GLOBAL")]
    Global,
    /// TOC for the currently active/selected stream
    ///  (this is a TOC representing the current stream from start to EOS,
    ///  and is what a TOC writer / muxer is usually interested in; it will
    ///  usually be a subset of the global TOC, e.g. just the chapters of
    ///  the current title, or the chapters selected for playback from the
    ///  current title)
    #[doc(alias = "GST_TOC_SCOPE_CURRENT")]
    Current,
    #[doc(hidden)]
    __Unknown(i32),
}

#[doc(hidden)]
impl IntoGlib for TocScope {
    type GlibType = ffi::GstTocScope;

    fn into_glib(self) -> ffi::GstTocScope {
        match self {
            Self::Global => ffi::GST_TOC_SCOPE_GLOBAL,
            Self::Current => ffi::GST_TOC_SCOPE_CURRENT,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstTocScope> for TocScope {
    unsafe fn from_glib(value: ffi::GstTocScope) -> Self {
        skip_assert_initialized!();
        match value {
            1 => Self::Global,
            2 => Self::Current,
            value => Self::__Unknown(value),
        }
    }
}

impl StaticType for TocScope {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_toc_scope_get_type()) }
    }
}

impl glib::value::ValueType for TocScope {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for TocScope {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for TocScope {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// The probability of the typefind function. Higher values have more certainty
/// in doing a reliable typefind.
#[derive(Debug, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstTypeFindProbability")]
pub enum TypeFindProbability {
    /// type undetected.
    #[doc(alias = "GST_TYPE_FIND_NONE")]
    None,
    /// unlikely typefind.
    #[doc(alias = "GST_TYPE_FIND_MINIMUM")]
    Minimum,
    /// possible type detected.
    #[doc(alias = "GST_TYPE_FIND_POSSIBLE")]
    Possible,
    /// likely a type was detected.
    #[doc(alias = "GST_TYPE_FIND_LIKELY")]
    Likely,
    /// nearly certain that a type was detected.
    #[doc(alias = "GST_TYPE_FIND_NEARLY_CERTAIN")]
    NearlyCertain,
    /// very certain a type was detected.
    #[doc(alias = "GST_TYPE_FIND_MAXIMUM")]
    Maximum,
    #[doc(hidden)]
    __Unknown(i32),
}

#[doc(hidden)]
impl IntoGlib for TypeFindProbability {
    type GlibType = ffi::GstTypeFindProbability;

    fn into_glib(self) -> ffi::GstTypeFindProbability {
        match self {
            Self::None => ffi::GST_TYPE_FIND_NONE,
            Self::Minimum => ffi::GST_TYPE_FIND_MINIMUM,
            Self::Possible => ffi::GST_TYPE_FIND_POSSIBLE,
            Self::Likely => ffi::GST_TYPE_FIND_LIKELY,
            Self::NearlyCertain => ffi::GST_TYPE_FIND_NEARLY_CERTAIN,
            Self::Maximum => ffi::GST_TYPE_FIND_MAXIMUM,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstTypeFindProbability> for TypeFindProbability {
    unsafe fn from_glib(value: ffi::GstTypeFindProbability) -> Self {
        skip_assert_initialized!();
        match value {
            0 => Self::None,
            1 => Self::Minimum,
            50 => Self::Possible,
            80 => Self::Likely,
            99 => Self::NearlyCertain,
            100 => Self::Maximum,
            value => Self::__Unknown(value),
        }
    }
}

impl StaticType for TypeFindProbability {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_type_find_probability_get_type()) }
    }
}

impl glib::value::ValueType for TypeFindProbability {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for TypeFindProbability {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for TypeFindProbability {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// Different URI-related errors that can occur.
#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstURIError")]
pub enum URIError {
    /// The protocol is not supported
    #[doc(alias = "GST_URI_ERROR_UNSUPPORTED_PROTOCOL")]
    UnsupportedProtocol,
    /// There was a problem with the URI
    #[doc(alias = "GST_URI_ERROR_BAD_URI")]
    BadUri,
    /// Could not set or change the URI because the
    ///  URI handler was in a state where that is not possible or not permitted
    #[doc(alias = "GST_URI_ERROR_BAD_STATE")]
    BadState,
    /// There was a problem with the entity that
    ///  the URI references
    #[doc(alias = "GST_URI_ERROR_BAD_REFERENCE")]
    BadReference,
    #[doc(hidden)]
    __Unknown(i32),
}

#[doc(hidden)]
impl IntoGlib for URIError {
    type GlibType = ffi::GstURIError;

    fn into_glib(self) -> ffi::GstURIError {
        match self {
            Self::UnsupportedProtocol => ffi::GST_URI_ERROR_UNSUPPORTED_PROTOCOL,
            Self::BadUri => ffi::GST_URI_ERROR_BAD_URI,
            Self::BadState => ffi::GST_URI_ERROR_BAD_STATE,
            Self::BadReference => ffi::GST_URI_ERROR_BAD_REFERENCE,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstURIError> for URIError {
    unsafe fn from_glib(value: ffi::GstURIError) -> Self {
        skip_assert_initialized!();
        match value {
            0 => Self::UnsupportedProtocol,
            1 => Self::BadUri,
            2 => Self::BadState,
            3 => Self::BadReference,
            value => Self::__Unknown(value),
        }
    }
}

impl ErrorDomain for URIError {
    fn domain() -> Quark {
        skip_assert_initialized!();

        unsafe { from_glib(ffi::gst_uri_error_quark()) }
    }

    fn code(self) -> i32 {
        self.into_glib()
    }

    fn from(code: i32) -> Option<Self> {
        skip_assert_initialized!();
        match code {
            0 => Some(Self::UnsupportedProtocol),
            1 => Some(Self::BadUri),
            2 => Some(Self::BadState),
            3 => Some(Self::BadReference),
            value => Some(Self::__Unknown(value)),
        }
    }
}

impl StaticType for URIError {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_uri_error_get_type()) }
    }
}

impl glib::value::ValueType for URIError {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for URIError {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for URIError {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

/// The different types of URI direction.
#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Clone, Copy)]
#[non_exhaustive]
#[doc(alias = "GstURIType")]
pub enum URIType {
    /// The URI direction is unknown
    #[doc(alias = "GST_URI_UNKNOWN")]
    Unknown,
    /// The URI is a consumer.
    #[doc(alias = "GST_URI_SINK")]
    Sink,
    /// The URI is a producer.
    #[doc(alias = "GST_URI_SRC")]
    Src,
    #[doc(hidden)]
    __Unknown(i32),
}

#[doc(hidden)]
impl IntoGlib for URIType {
    type GlibType = ffi::GstURIType;

    fn into_glib(self) -> ffi::GstURIType {
        match self {
            Self::Unknown => ffi::GST_URI_UNKNOWN,
            Self::Sink => ffi::GST_URI_SINK,
            Self::Src => ffi::GST_URI_SRC,
            Self::__Unknown(value) => value,
        }
    }
}

#[doc(hidden)]
impl FromGlib<ffi::GstURIType> for URIType {
    unsafe fn from_glib(value: ffi::GstURIType) -> Self {
        skip_assert_initialized!();
        match value {
            0 => Self::Unknown,
            1 => Self::Sink,
            2 => Self::Src,
            value => Self::__Unknown(value),
        }
    }
}

impl StaticType for URIType {
    fn static_type() -> Type {
        unsafe { from_glib(ffi::gst_uri_type_get_type()) }
    }
}

impl glib::value::ValueType for URIType {
    type Type = Self;
}

unsafe impl<'a> FromValue<'a> for URIType {
    type Checker = glib::value::GenericValueTypeChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib(glib::gobject_ffi::g_value_get_enum(value.to_glib_none().0))
    }
}

impl ToValue for URIType {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, self.into_glib());
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}