gstreamer-rs/gstreamer/src/value.rs

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2020-12-15 10:53:31 +00:00
// Take a look at the license at the top of the repository in the LICENSE file.
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use num_rational::Rational32;
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use std::borrow::{Borrow, Cow};
use std::cmp;
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use std::fmt;
use std::ops;
use std::slice;
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use glib::translate::{from_glib, FromGlibPtrFull, ToGlibPtr, ToGlibPtrMut, Uninitialized};
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use glib::value::ToSendValue;
use glib::StaticType;
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#[derive(Copy, Clone, Debug, Ord, PartialOrd, Eq, PartialEq, Hash)]
pub struct Fraction(pub Rational32);
impl Fraction {
pub fn new(num: i32, den: i32) -> Self {
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assert_initialized_main_thread!();
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(num, den).into()
}
pub fn approximate_f32(x: f32) -> Option<Self> {
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assert_initialized_main_thread!();
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Rational32::approximate_float(x).map(|r| r.into())
}
pub fn approximate_f64(x: f64) -> Option<Self> {
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assert_initialized_main_thread!();
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Rational32::approximate_float(x).map(|r| r.into())
}
}
impl fmt::Display for Fraction {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
self.0.fmt(f)
}
}
impl ops::Deref for Fraction {
type Target = Rational32;
fn deref(&self) -> &Self::Target {
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&self.0
}
}
impl ops::DerefMut for Fraction {
fn deref_mut(&mut self) -> &mut Rational32 {
&mut self.0
}
}
impl AsRef<Rational32> for Fraction {
fn as_ref(&self) -> &Rational32 {
&self.0
}
}
macro_rules! impl_fraction_binop {
($name:ident, $f:ident, $name_assign:ident, $f_assign:ident) => {
impl ops::$name<Fraction> for Fraction {
type Output = Fraction;
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fn $f(self, other: Fraction) -> Self::Output {
Fraction((self.0).$f(other.0))
}
}
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impl ops::$name<Fraction> for &Fraction {
type Output = Fraction;
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fn $f(self, other: Fraction) -> Self::Output {
Fraction((self.0).$f(other.0))
}
}
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impl ops::$name<&Fraction> for Fraction {
type Output = Fraction;
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fn $f(self, other: &Fraction) -> Self::Output {
Fraction((self.0).$f(other.0))
}
}
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impl ops::$name<&Fraction> for &Fraction {
type Output = Fraction;
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fn $f(self, other: &Fraction) -> Self::Output {
Fraction((self.0).$f(other.0))
}
}
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impl ops::$name<i32> for Fraction {
type Output = Fraction;
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fn $f(self, other: i32) -> Self::Output {
self.$f(Fraction::from(other))
}
}
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impl ops::$name<i32> for &Fraction {
type Output = Fraction;
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fn $f(self, other: i32) -> Self::Output {
self.$f(Fraction::from(other))
}
}
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impl ops::$name<&i32> for Fraction {
type Output = Fraction;
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fn $f(self, other: &i32) -> Self::Output {
self.$f(Fraction::from(*other))
}
}
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impl ops::$name<&i32> for &Fraction {
type Output = Fraction;
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fn $f(self, other: &i32) -> Self::Output {
self.$f(Fraction::from(*other))
}
}
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impl ops::$name<Fraction> for i32 {
type Output = Fraction;
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fn $f(self, other: Fraction) -> Self::Output {
Fraction::from(self).$f(other)
}
}
impl ops::$name<&Fraction> for i32 {
type Output = Fraction;
fn $f(self, other: &Fraction) -> Self::Output {
Fraction::from(self).$f(other)
}
}
impl ops::$name<Fraction> for &i32 {
type Output = Fraction;
fn $f(self, other: Fraction) -> Self::Output {
Fraction::from(*self).$f(other)
}
}
impl ops::$name<&Fraction> for &i32 {
type Output = Fraction;
fn $f(self, other: &Fraction) -> Self::Output {
Fraction::from(*self).$f(other)
}
}
impl ops::$name_assign<Fraction> for Fraction {
fn $f_assign(&mut self, other: Fraction) {
(self.0).$f_assign(other.0)
}
}
impl ops::$name_assign<&Fraction> for Fraction {
fn $f_assign(&mut self, other: &Fraction) {
(self.0).$f_assign(other.0)
}
}
impl ops::$name_assign<i32> for Fraction {
fn $f_assign(&mut self, other: i32) {
(self.0).$f_assign(other)
}
}
impl ops::$name_assign<&i32> for Fraction {
fn $f_assign(&mut self, other: &i32) {
(self.0).$f_assign(other)
}
}
};
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}
impl_fraction_binop!(Add, add, AddAssign, add_assign);
impl_fraction_binop!(Sub, sub, SubAssign, sub_assign);
impl_fraction_binop!(Div, div, DivAssign, div_assign);
impl_fraction_binop!(Mul, mul, MulAssign, mul_assign);
impl_fraction_binop!(Rem, rem, RemAssign, rem_assign);
impl ops::Neg for Fraction {
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type Output = Fraction;
fn neg(self) -> Self::Output {
Fraction(self.0.neg())
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}
}
impl ops::Neg for &Fraction {
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type Output = Fraction;
fn neg(self) -> Self::Output {
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Fraction(self.0.neg())
}
}
impl From<i32> for Fraction {
fn from(x: i32) -> Self {
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assert_initialized_main_thread!();
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Fraction(x.into())
}
}
impl From<(i32, i32)> for Fraction {
fn from(x: (i32, i32)) -> Self {
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assert_initialized_main_thread!();
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Fraction(x.into())
}
}
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impl From<Fraction> for (i32, i32) {
fn from(f: Fraction) -> Self {
skip_assert_initialized!();
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f.0.into()
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}
}
impl From<Rational32> for Fraction {
fn from(x: Rational32) -> Self {
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assert_initialized_main_thread!();
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Fraction(x)
}
}
impl From<Fraction> for Rational32 {
fn from(x: Fraction) -> Self {
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skip_assert_initialized!();
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x.0
}
}
impl glib::types::StaticType for Fraction {
fn static_type() -> glib::types::Type {
unsafe { from_glib(ffi::gst_fraction_get_type()) }
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}
}
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impl glib::value::ValueType for Fraction {
type Type = Self;
}
unsafe impl<'a> glib::value::FromValue<'a> for Fraction {
type Checker = glib::value::GenericValueTypeChecker<Self>;
unsafe fn from_value(value: &'a glib::Value) -> Self {
skip_assert_initialized!();
let n = ffi::gst_value_get_fraction_numerator(value.to_glib_none().0);
let d = ffi::gst_value_get_fraction_denominator(value.to_glib_none().0);
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Fraction::new(n, d)
}
}
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impl glib::value::ToValue for Fraction {
fn to_value(&self) -> glib::Value {
let mut value = glib::Value::for_value_type::<Self>();
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unsafe {
ffi::gst_value_set_fraction(value.to_glib_none_mut().0, *self.numer(), *self.denom());
}
value
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}
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fn value_type(&self) -> glib::Type {
Self::static_type()
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}
}
#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
#[cfg_attr(feature = "ser_de", derive(serde::Serialize, serde::Deserialize))]
pub struct IntRange<T> {
min: T,
max: T,
step: T,
}
impl<T: Copy> IntRange<T> {
pub fn min(&self) -> T {
self.min
}
pub fn max(&self) -> T {
self.max
}
pub fn step(&self) -> T {
self.step
}
}
impl IntRange<i32> {
pub fn new(min: i32, max: i32) -> Self {
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skip_assert_initialized!();
Self::with_step(min, max, 1)
}
pub fn with_step(min: i32, max: i32, step: i32) -> Self {
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assert_initialized_main_thread!();
assert!(min <= max);
assert!(step > 0);
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Self { min, max, step }
}
}
impl IntRange<i64> {
pub fn new(min: i64, max: i64) -> Self {
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skip_assert_initialized!();
Self::with_step(min, max, 1)
}
pub fn with_step(min: i64, max: i64, step: i64) -> Self {
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assert_initialized_main_thread!();
assert!(min <= max);
assert!(step > 0);
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Self { min, max, step }
}
}
impl From<(i32, i32)> for IntRange<i32> {
fn from((min, max): (i32, i32)) -> Self {
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skip_assert_initialized!();
Self::new(min, max)
}
}
impl From<(i32, i32, i32)> for IntRange<i32> {
fn from((min, max, step): (i32, i32, i32)) -> Self {
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skip_assert_initialized!();
Self::with_step(min, max, step)
}
}
impl From<(i64, i64)> for IntRange<i64> {
fn from((min, max): (i64, i64)) -> Self {
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skip_assert_initialized!();
Self::new(min, max)
}
}
impl From<(i64, i64, i64)> for IntRange<i64> {
fn from((min, max, step): (i64, i64, i64)) -> Self {
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skip_assert_initialized!();
Self::with_step(min, max, step)
}
}
impl glib::types::StaticType for IntRange<i32> {
fn static_type() -> glib::types::Type {
unsafe { from_glib(ffi::gst_int_range_get_type()) }
}
}
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impl glib::value::ValueType for IntRange<i32> {
type Type = Self;
}
unsafe impl<'a> glib::value::FromValue<'a> for IntRange<i32> {
type Checker = glib::value::GenericValueTypeChecker<Self>;
unsafe fn from_value(value: &'a glib::Value) -> Self {
skip_assert_initialized!();
let min = ffi::gst_value_get_int_range_min(value.to_glib_none().0);
let max = ffi::gst_value_get_int_range_max(value.to_glib_none().0);
let step = ffi::gst_value_get_int_range_step(value.to_glib_none().0);
Self::with_step(min, max, step)
}
}
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impl glib::value::ToValue for IntRange<i32> {
fn to_value(&self) -> glib::Value {
let mut value = glib::Value::for_value_type::<Self>();
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unsafe {
ffi::gst_value_set_int_range_step(
value.to_glib_none_mut().0,
self.min(),
self.max(),
self.step(),
);
}
value
}
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fn value_type(&self) -> glib::Type {
Self::static_type()
}
}
impl glib::types::StaticType for IntRange<i64> {
fn static_type() -> glib::types::Type {
unsafe { from_glib(ffi::gst_int64_range_get_type()) }
}
}
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impl glib::value::ValueType for IntRange<i64> {
type Type = Self;
}
unsafe impl<'a> glib::value::FromValue<'a> for IntRange<i64> {
type Checker = glib::value::GenericValueTypeChecker<Self>;
unsafe fn from_value(value: &'a glib::Value) -> Self {
skip_assert_initialized!();
let min = ffi::gst_value_get_int64_range_min(value.to_glib_none().0);
let max = ffi::gst_value_get_int64_range_max(value.to_glib_none().0);
let step = ffi::gst_value_get_int64_range_step(value.to_glib_none().0);
Self::with_step(min, max, step)
}
}
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impl glib::value::ToValue for IntRange<i64> {
fn to_value(&self) -> glib::Value {
let mut value = glib::Value::for_value_type::<Self>();
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unsafe {
ffi::gst_value_set_int64_range_step(
value.to_glib_none_mut().0,
self.min(),
self.max(),
self.step(),
);
}
value
}
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fn value_type(&self) -> glib::Type {
Self::static_type()
}
}
#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
#[cfg_attr(feature = "ser_de", derive(serde::Serialize, serde::Deserialize))]
pub struct FractionRange {
min: Fraction,
max: Fraction,
}
impl FractionRange {
pub fn new<T: Into<Fraction>, U: Into<Fraction>>(min: T, max: U) -> Self {
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assert_initialized_main_thread!();
let min = min.into();
let max = max.into();
assert!(min <= max);
FractionRange { min, max }
}
pub fn min(&self) -> Fraction {
self.min
}
pub fn max(&self) -> Fraction {
self.max
}
}
impl From<(Fraction, Fraction)> for FractionRange {
fn from((min, max): (Fraction, Fraction)) -> Self {
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skip_assert_initialized!();
Self::new(min, max)
}
}
impl glib::types::StaticType for FractionRange {
fn static_type() -> glib::types::Type {
unsafe { from_glib(ffi::gst_fraction_range_get_type()) }
}
}
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impl glib::value::ValueType for FractionRange {
type Type = Self;
}
unsafe impl<'a> glib::value::FromValue<'a> for FractionRange {
type Checker = glib::value::GenericValueTypeChecker<Self>;
unsafe fn from_value(value: &'a glib::Value) -> Self {
skip_assert_initialized!();
let min = ffi::gst_value_get_fraction_range_min(value.to_glib_none().0);
let max = ffi::gst_value_get_fraction_range_max(value.to_glib_none().0);
let min_n = ffi::gst_value_get_fraction_numerator(min);
let min_d = ffi::gst_value_get_fraction_denominator(min);
let max_n = ffi::gst_value_get_fraction_numerator(max);
let max_d = ffi::gst_value_get_fraction_denominator(max);
Self::new((min_n, min_d), (max_n, max_d))
}
}
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impl glib::value::ToValue for FractionRange {
fn to_value(&self) -> glib::Value {
let mut value = glib::Value::for_value_type::<Self>();
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unsafe {
ffi::gst_value_set_fraction_range_full(
value.to_glib_none_mut().0,
*self.min().numer(),
*self.min().denom(),
*self.max().numer(),
*self.max().denom(),
);
}
value
}
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fn value_type(&self) -> glib::Type {
Self::static_type()
}
}
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#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
#[cfg_attr(feature = "ser_de", derive(serde::Serialize, serde::Deserialize))]
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pub struct Bitmask(pub u64);
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impl Bitmask {
pub fn new(v: u64) -> Self {
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assert_initialized_main_thread!();
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Bitmask(v)
}
}
impl ops::Deref for Bitmask {
type Target = u64;
fn deref(&self) -> &u64 {
&self.0
}
}
impl ops::DerefMut for Bitmask {
fn deref_mut(&mut self) -> &mut u64 {
&mut self.0
}
}
impl ops::BitAnd for Bitmask {
type Output = Self;
fn bitand(self, rhs: Self) -> Self {
Bitmask(self.0.bitand(rhs.0))
}
}
impl ops::BitOr for Bitmask {
type Output = Self;
fn bitor(self, rhs: Self) -> Self {
Bitmask(self.0.bitor(rhs.0))
}
}
impl ops::BitXor for Bitmask {
type Output = Self;
fn bitxor(self, rhs: Self) -> Self {
Bitmask(self.0.bitxor(rhs.0))
}
}
impl ops::Not for Bitmask {
type Output = Self;
fn not(self) -> Self {
Bitmask(self.0.not())
}
}
impl From<u64> for Bitmask {
fn from(v: u64) -> Self {
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skip_assert_initialized!();
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Self::new(v)
}
}
impl glib::types::StaticType for Bitmask {
fn static_type() -> glib::types::Type {
unsafe { from_glib(ffi::gst_bitmask_get_type()) }
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}
}
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impl glib::value::ValueType for Bitmask {
type Type = Self;
}
unsafe impl<'a> glib::value::FromValue<'a> for Bitmask {
type Checker = glib::value::GenericValueTypeChecker<Self>;
unsafe fn from_value(value: &'a glib::Value) -> Self {
skip_assert_initialized!();
let v = ffi::gst_value_get_bitmask(value.to_glib_none().0);
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Self::new(v)
}
}
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impl glib::value::ToValue for Bitmask {
fn to_value(&self) -> glib::Value {
let mut value = glib::Value::for_value_type::<Self>();
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unsafe {
ffi::gst_value_set_bitmask(value.to_glib_none_mut().0, self.0);
}
value
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}
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fn value_type(&self) -> glib::Type {
Self::static_type()
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}
}
#[derive(Clone, Debug)]
pub struct Array<'a>(Cow<'a, [glib::SendValue]>);
unsafe impl<'a> Send for Array<'a> {}
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unsafe impl<'a> Sync for Array<'a> {}
impl<'a> Array<'a> {
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pub fn new(values: &[&(dyn ToSendValue + Sync)]) -> Self {
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assert_initialized_main_thread!();
Array(values.iter().map(|v| v.to_send_value()).collect())
}
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pub fn from_borrowed(values: &'a impl AsRef<[glib::SendValue]>) -> Self {
assert_initialized_main_thread!();
Array(Cow::Borrowed(values.as_ref()))
}
pub fn from_owned(values: Vec<glib::SendValue>) -> Self {
assert_initialized_main_thread!();
Array(Cow::Owned(values))
}
pub fn into_owned(self) -> Array<'static> {
Array(self.0.into_owned().into())
}
pub fn as_slice(&self) -> &[glib::SendValue] {
self.0.borrow()
}
}
impl<'a> ops::Deref for Array<'a> {
type Target = [glib::SendValue];
fn deref(&self) -> &[glib::SendValue] {
self.as_slice()
}
}
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impl<'a> From<&'a [&'a (dyn ToSendValue + Sync)]> for Array<'a> {
fn from(values: &'a [&'a (dyn ToSendValue + Sync)]) -> Self {
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skip_assert_initialized!();
Self::new(values)
}
}
impl<'a> From<&'a [glib::SendValue]> for Array<'a> {
fn from(values: &'a [glib::SendValue]) -> Self {
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assert_initialized_main_thread!();
Array(Cow::Borrowed(values))
}
}
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impl<'a> glib::value::ValueType for Array<'static> {
type Type = Self;
}
unsafe impl<'a> glib::value::FromValue<'a> for Array<'a> {
type Checker = glib::value::GenericValueTypeChecker<Self>;
unsafe fn from_value(value: &'a glib::Value) -> Self {
skip_assert_initialized!();
let arr = (*value.to_glib_none().0).data[0].v_pointer as *const glib::ffi::GArray;
if arr.is_null() {
Array(Cow::Borrowed(&[]))
} else {
#[allow(clippy::cast_ptr_alignment)]
Array(Cow::Borrowed(slice::from_raw_parts(
(*arr).data as *const glib::SendValue,
(*arr).len as usize,
)))
}
}
}
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impl<'a> glib::value::ToValue for Array<'a> {
fn to_value(&self) -> glib::Value {
let mut value = glib::Value::for_value_type::<Array<'static>>();
unsafe {
for v in self.as_slice() {
ffi::gst_value_array_append_value(value.to_glib_none_mut().0, v.to_glib_none().0);
}
}
value
}
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fn value_type(&self) -> glib::Type {
Self::static_type()
}
}
impl<'a> glib::types::StaticType for Array<'a> {
fn static_type() -> glib::types::Type {
unsafe { from_glib(ffi::gst_value_array_get_type()) }
}
}
#[derive(Clone, Debug)]
pub struct List<'a>(Cow<'a, [glib::SendValue]>);
unsafe impl<'a> Send for List<'a> {}
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unsafe impl<'a> Sync for List<'a> {}
impl<'a> List<'a> {
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pub fn new(values: &[&(dyn ToSendValue + Sync)]) -> Self {
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assert_initialized_main_thread!();
List(values.iter().map(|v| v.to_send_value()).collect())
}
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pub fn from_borrowed(values: &'a impl AsRef<[glib::SendValue]>) -> Self {
assert_initialized_main_thread!();
List(Cow::Borrowed(values.as_ref()))
}
pub fn from_owned(values: Vec<glib::SendValue>) -> Self {
assert_initialized_main_thread!();
List(Cow::Owned(values))
}
pub fn into_owned(self) -> List<'static> {
List(self.0.into_owned().into())
}
pub fn as_slice(&self) -> &[glib::SendValue] {
self.0.borrow()
}
}
impl<'a> ops::Deref for List<'a> {
type Target = [glib::SendValue];
fn deref(&self) -> &[glib::SendValue] {
self.as_slice()
}
}
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impl<'a> From<&'a [&'a (dyn ToSendValue + Sync)]> for List<'a> {
fn from(values: &'a [&'a (dyn ToSendValue + Sync)]) -> Self {
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skip_assert_initialized!();
Self::new(values)
}
}
impl<'a> From<&'a [glib::SendValue]> for List<'a> {
fn from(values: &'a [glib::SendValue]) -> Self {
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assert_initialized_main_thread!();
List(Cow::Borrowed(values))
}
}
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impl glib::value::ValueType for List<'static> {
type Type = Self;
}
unsafe impl<'a> glib::value::FromValue<'a> for List<'a> {
type Checker = glib::value::GenericValueTypeChecker<Self>;
unsafe fn from_value(value: &'a glib::Value) -> Self {
skip_assert_initialized!();
let arr = (*value.to_glib_none().0).data[0].v_pointer as *const glib::ffi::GArray;
if arr.is_null() {
List(Cow::Borrowed(&[]))
} else {
#[allow(clippy::cast_ptr_alignment)]
List(Cow::Borrowed(slice::from_raw_parts(
(*arr).data as *const glib::SendValue,
(*arr).len as usize,
)))
}
}
}
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impl<'a> glib::value::ToValue for List<'a> {
fn to_value(&self) -> glib::Value {
let mut value = glib::Value::for_value_type::<List<'static>>();
unsafe {
for v in self.as_slice() {
ffi::gst_value_list_append_value(value.to_glib_none_mut().0, v.to_glib_none().0);
}
}
value
}
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fn value_type(&self) -> glib::Type {
Self::static_type()
}
}
impl<'a> glib::types::StaticType for List<'a> {
fn static_type() -> glib::types::Type {
unsafe { from_glib(ffi::gst_value_list_get_type()) }
}
}
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pub trait GstValueExt: Sized {
#[doc(alias = "gst_value_can_compare")]
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fn can_compare(&self, other: &Self) -> bool;
#[doc(alias = "gst_value_compare")]
fn compare(&self, other: &Self) -> Option<cmp::Ordering>;
fn eq(&self, other: &Self) -> bool;
#[doc(alias = "gst_value_can_intersect")]
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fn can_intersect(&self, other: &Self) -> bool;
#[doc(alias = "gst_value_intersect")]
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fn intersect(&self, other: &Self) -> Option<Self>;
#[doc(alias = "gst_value_can_subtract")]
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fn can_subtract(&self, other: &Self) -> bool;
#[doc(alias = "gst_value_subtract")]
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fn subtract(&self, other: &Self) -> Option<Self>;
#[doc(alias = "gst_value_can_union")]
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fn can_union(&self, other: &Self) -> bool;
#[doc(alias = "gst_value_union")]
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fn union(&self, other: &Self) -> Option<Self>;
#[doc(alias = "gst_value_fixate")]
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fn fixate(&self) -> Option<Self>;
#[doc(alias = "gst_value_is_fixed")]
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fn is_fixed(&self) -> bool;
#[doc(alias = "gst_value_is_subset")]
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fn is_subset(&self, superset: &Self) -> bool;
#[doc(alias = "gst_value_serialize")]
fn serialize(&self) -> Result<glib::GString, glib::BoolError>;
#[doc(alias = "gst_value_deserialize")]
fn deserialize<'a, T: Into<&'a str>>(
s: T,
type_: glib::Type,
) -> Result<glib::Value, glib::BoolError>;
#[cfg(any(feature = "v1_20", feature = "dox"))]
#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_20")))]
#[doc(alias = "gst_value_deserialize_with_pspec")]
fn deserialize_with_pspec<'a, T: Into<&'a str>>(
s: T,
pspec: &glib::ParamSpec,
) -> Result<glib::Value, glib::BoolError>;
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}
impl GstValueExt for glib::Value {
fn can_compare(&self, other: &Self) -> bool {
unsafe {
from_glib(ffi::gst_value_can_compare(
self.to_glib_none().0,
other.to_glib_none().0,
))
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}
}
fn compare(&self, other: &Self) -> Option<cmp::Ordering> {
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unsafe {
let val = ffi::gst_value_compare(self.to_glib_none().0, other.to_glib_none().0);
match val {
ffi::GST_VALUE_LESS_THAN => Some(cmp::Ordering::Less),
ffi::GST_VALUE_EQUAL => Some(cmp::Ordering::Equal),
ffi::GST_VALUE_GREATER_THAN => Some(cmp::Ordering::Greater),
_ => None,
}
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}
}
fn eq(&self, other: &Self) -> bool {
self.compare(other) == Some(cmp::Ordering::Equal)
}
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fn can_intersect(&self, other: &Self) -> bool {
unsafe {
from_glib(ffi::gst_value_can_intersect(
self.to_glib_none().0,
other.to_glib_none().0,
))
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}
}
fn intersect(&self, other: &Self) -> Option<Self> {
unsafe {
let mut value = glib::Value::uninitialized();
let ret: bool = from_glib(ffi::gst_value_intersect(
value.to_glib_none_mut().0,
self.to_glib_none().0,
other.to_glib_none().0,
));
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if ret {
Some(value)
} else {
None
}
}
}
fn can_subtract(&self, other: &Self) -> bool {
unsafe {
from_glib(ffi::gst_value_can_subtract(
self.to_glib_none().0,
other.to_glib_none().0,
))
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}
}
fn subtract(&self, other: &Self) -> Option<Self> {
unsafe {
let mut value = glib::Value::uninitialized();
let ret: bool = from_glib(ffi::gst_value_subtract(
value.to_glib_none_mut().0,
self.to_glib_none().0,
other.to_glib_none().0,
));
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if ret {
Some(value)
} else {
None
}
}
}
fn can_union(&self, other: &Self) -> bool {
unsafe {
from_glib(ffi::gst_value_can_union(
self.to_glib_none().0,
other.to_glib_none().0,
))
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}
}
fn union(&self, other: &Self) -> Option<Self> {
unsafe {
let mut value = glib::Value::uninitialized();
let ret: bool = from_glib(ffi::gst_value_union(
value.to_glib_none_mut().0,
self.to_glib_none().0,
other.to_glib_none().0,
));
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if ret {
Some(value)
} else {
None
}
}
}
fn fixate(&self) -> Option<Self> {
unsafe {
let mut value = glib::Value::uninitialized();
let ret: bool = from_glib(ffi::gst_value_fixate(
value.to_glib_none_mut().0,
self.to_glib_none().0,
));
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if ret {
Some(value)
} else {
None
}
}
}
fn is_fixed(&self) -> bool {
unsafe { from_glib(ffi::gst_value_is_fixed(self.to_glib_none().0)) }
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}
fn is_subset(&self, superset: &Self) -> bool {
unsafe {
from_glib(ffi::gst_value_is_subset(
self.to_glib_none().0,
superset.to_glib_none().0,
))
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}
}
fn serialize(&self) -> Result<glib::GString, glib::BoolError> {
unsafe {
Option::<_>::from_glib_full(ffi::gst_value_serialize(self.to_glib_none().0))
.ok_or_else(|| glib::bool_error!("Failed to serialize value"))
}
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}
fn deserialize<'a, T: Into<&'a str>>(
s: T,
type_: glib::Type,
) -> Result<glib::Value, glib::BoolError> {
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assert_initialized_main_thread!();
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let s = s.into();
unsafe {
let mut value = glib::Value::from_type(type_);
let ret: bool = from_glib(ffi::gst_value_deserialize(
value.to_glib_none_mut().0,
s.to_glib_none().0,
));
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if ret {
Ok(value)
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} else {
Err(glib::bool_error!("Failed to deserialize value"))
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}
}
}
#[cfg(any(feature = "v1_20", feature = "dox"))]
#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_20")))]
fn deserialize_with_pspec<'a, T: Into<&'a str>>(
s: T,
pspec: &glib::ParamSpec,
) -> Result<glib::Value, glib::BoolError> {
assert_initialized_main_thread!();
let s = s.into();
unsafe {
let mut value = glib::Value::from_type(pspec.value_type());
let ret: bool = from_glib(ffi::gst_value_deserialize_with_pspec(
value.to_glib_none_mut().0,
s.to_glib_none().0,
pspec.to_glib_none().0,
));
if ret {
Ok(value)
} else {
Err(glib::bool_error!("Failed to deserialize value"))
}
}
}
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}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_fraction() {
crate::init().unwrap();
let f1 = crate::Fraction::new(1, 2);
let f2 = crate::Fraction::new(2, 3);
let mut f3 = f1 * f2;
let f4 = f1 * f2;
f3 *= f2;
f3 *= f4;
assert_eq!(f3, crate::Fraction::new(2, 27));
}
#[test]
fn test_deserialize() {
crate::init().unwrap();
let v = glib::Value::deserialize("123", i32::static_type()).unwrap();
assert_eq!(v.get::<i32>(), Ok(123));
}
}