mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer-rs.git
synced 2024-11-05 17:19:42 +00:00
488 lines
13 KiB
Rust
488 lines
13 KiB
Rust
// Take a look at the license at the top of the repository in the LICENSE file.
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use std::borrow::{Borrow, BorrowMut, ToOwned};
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use std::ffi::CStr;
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use std::fmt;
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use std::mem;
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use std::ops::{Deref, DerefMut};
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use std::ptr;
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use std::str;
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use once_cell::sync::Lazy;
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use glib::ffi::gpointer;
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use glib::translate::{
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from_glib, from_glib_full, FromGlibPtrFull, FromGlibPtrNone, GlibPtrDefault, Stash, StashMut,
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ToGlibPtr, ToGlibPtrMut,
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};
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pub struct CapsFeatures(ptr::NonNull<ffi::GstCapsFeatures>);
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unsafe impl Send for CapsFeatures {}
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unsafe impl Sync for CapsFeatures {}
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impl CapsFeatures {
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pub fn new(features: &[&str]) -> Self {
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assert_initialized_main_thread!();
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let mut f = Self::new_empty();
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for feature in features {
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f.add(feature);
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}
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f
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}
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pub fn new_empty() -> Self {
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assert_initialized_main_thread!();
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unsafe {
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CapsFeatures(ptr::NonNull::new_unchecked(
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ffi::gst_caps_features_new_empty(),
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))
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}
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}
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pub fn new_any() -> Self {
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assert_initialized_main_thread!();
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unsafe { CapsFeatures(ptr::NonNull::new_unchecked(ffi::gst_caps_features_new_any())) }
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}
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pub unsafe fn into_ptr(self) -> *mut ffi::GstCapsFeatures {
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let s = mem::ManuallyDrop::new(self);
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s.0.as_ptr()
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}
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}
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impl Deref for CapsFeatures {
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type Target = CapsFeaturesRef;
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fn deref(&self) -> &CapsFeaturesRef {
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unsafe { &*(self.0.as_ref() as *const ffi::GstCapsFeatures as *const CapsFeaturesRef) }
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}
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}
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impl DerefMut for CapsFeatures {
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fn deref_mut(&mut self) -> &mut CapsFeaturesRef {
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unsafe { &mut *(self.0.as_mut() as *mut ffi::GstCapsFeatures as *mut CapsFeaturesRef) }
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}
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}
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impl AsRef<CapsFeaturesRef> for CapsFeatures {
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fn as_ref(&self) -> &CapsFeaturesRef {
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self.deref()
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}
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}
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impl AsMut<CapsFeaturesRef> for CapsFeatures {
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fn as_mut(&mut self) -> &mut CapsFeaturesRef {
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self.deref_mut()
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}
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}
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impl Clone for CapsFeatures {
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fn clone(&self) -> Self {
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unsafe {
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let ptr = ffi::gst_caps_features_copy(self.0.as_ref());
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assert!(!ptr.is_null());
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CapsFeatures(ptr::NonNull::new_unchecked(ptr))
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}
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}
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}
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impl Drop for CapsFeatures {
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fn drop(&mut self) {
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unsafe { ffi::gst_caps_features_free(self.0.as_mut()) }
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}
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}
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impl fmt::Debug for CapsFeatures {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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f.debug_tuple("CapsFeatures")
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.field(&self.to_string())
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.finish()
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}
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}
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impl fmt::Display for CapsFeatures {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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// Need to make sure to not call ToString::to_string() here, which
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// we have because of the Display impl. We need CapsFeaturesRef::to_string()
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f.write_str(&CapsFeaturesRef::to_string(self.as_ref()))
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}
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}
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impl str::FromStr for CapsFeatures {
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type Err = glib::BoolError;
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fn from_str(s: &str) -> Result<Self, Self::Err> {
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assert_initialized_main_thread!();
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unsafe {
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let ptr = ffi::gst_caps_features_from_string(s.to_glib_none().0);
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if ptr.is_null() {
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return Err(glib::bool_error!(
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"Failed to parse caps features from string"
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));
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}
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Ok(Self(ptr::NonNull::new_unchecked(ptr)))
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}
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}
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}
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impl Borrow<CapsFeaturesRef> for CapsFeatures {
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fn borrow(&self) -> &CapsFeaturesRef {
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self.as_ref()
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}
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}
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impl BorrowMut<CapsFeaturesRef> for CapsFeatures {
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fn borrow_mut(&mut self) -> &mut CapsFeaturesRef {
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self.as_mut()
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}
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}
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impl glib::types::StaticType for CapsFeatures {
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fn static_type() -> glib::types::Type {
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unsafe { from_glib(ffi::gst_caps_features_get_type()) }
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}
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}
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impl<'a> ToGlibPtr<'a, *const ffi::GstCapsFeatures> for CapsFeatures {
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type Storage = &'a Self;
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fn to_glib_none(&'a self) -> Stash<'a, *const ffi::GstCapsFeatures, Self> {
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unsafe { Stash(self.0.as_ref(), self) }
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}
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fn to_glib_full(&self) -> *const ffi::GstCapsFeatures {
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unsafe { ffi::gst_caps_features_copy(self.0.as_ref()) }
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}
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}
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impl<'a> ToGlibPtr<'a, *mut ffi::GstCapsFeatures> for CapsFeatures {
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type Storage = &'a Self;
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fn to_glib_none(&'a self) -> Stash<'a, *mut ffi::GstCapsFeatures, Self> {
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unsafe {
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Stash(
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self.0.as_ref() as *const ffi::GstCapsFeatures as *mut ffi::GstCapsFeatures,
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self,
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)
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}
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}
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fn to_glib_full(&self) -> *mut ffi::GstCapsFeatures {
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unsafe { ffi::gst_caps_features_copy(self.0.as_ref()) }
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}
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}
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impl<'a> ToGlibPtrMut<'a, *mut ffi::GstCapsFeatures> for CapsFeatures {
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type Storage = &'a mut Self;
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fn to_glib_none_mut(&'a mut self) -> StashMut<*mut ffi::GstCapsFeatures, Self> {
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unsafe { StashMut(self.0.as_mut(), self) }
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}
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}
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impl FromGlibPtrNone<*const ffi::GstCapsFeatures> for CapsFeatures {
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unsafe fn from_glib_none(ptr: *const ffi::GstCapsFeatures) -> Self {
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assert!(!ptr.is_null());
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let ptr = ffi::gst_caps_features_copy(ptr);
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assert!(!ptr.is_null());
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CapsFeatures(ptr::NonNull::new_unchecked(ptr))
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}
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}
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impl FromGlibPtrNone<*mut ffi::GstCapsFeatures> for CapsFeatures {
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unsafe fn from_glib_none(ptr: *mut ffi::GstCapsFeatures) -> Self {
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assert!(!ptr.is_null());
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let ptr = ffi::gst_caps_features_copy(ptr);
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assert!(!ptr.is_null());
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CapsFeatures(ptr::NonNull::new_unchecked(ptr))
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}
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}
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impl FromGlibPtrFull<*const ffi::GstCapsFeatures> for CapsFeatures {
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unsafe fn from_glib_full(ptr: *const ffi::GstCapsFeatures) -> Self {
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assert!(!ptr.is_null());
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CapsFeatures(ptr::NonNull::new_unchecked(
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ptr as *mut ffi::GstCapsFeatures,
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))
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}
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}
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impl FromGlibPtrFull<*mut ffi::GstCapsFeatures> for CapsFeatures {
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unsafe fn from_glib_full(ptr: *mut ffi::GstCapsFeatures) -> Self {
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assert!(!ptr.is_null());
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CapsFeatures(ptr::NonNull::new_unchecked(ptr))
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}
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}
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impl<'a> glib::value::FromValueOptional<'a> for CapsFeatures {
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unsafe fn from_value_optional(v: &'a glib::Value) -> Option<Self> {
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<&'a CapsFeaturesRef as glib::value::FromValueOptional<'a>>::from_value_optional(v)
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.map(ToOwned::to_owned)
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}
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}
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impl glib::value::SetValue for CapsFeatures {
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unsafe fn set_value(v: &mut glib::Value, s: &Self) {
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<CapsFeaturesRef as glib::value::SetValue>::set_value(v, s.as_ref())
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}
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}
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impl glib::value::SetValueOptional for CapsFeatures {
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unsafe fn set_value_optional(v: &mut glib::Value, s: Option<&Self>) {
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<CapsFeaturesRef as glib::value::SetValueOptional>::set_value_optional(
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v,
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s.map(|s| s.as_ref()),
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)
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}
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}
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impl GlibPtrDefault for CapsFeatures {
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type GlibType = *mut ffi::GstCapsFeatures;
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}
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#[repr(transparent)]
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pub struct CapsFeaturesRef(ffi::GstCapsFeatures);
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impl CapsFeaturesRef {
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pub unsafe fn from_glib_borrow<'a>(ptr: *const ffi::GstCapsFeatures) -> &'a CapsFeaturesRef {
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assert!(!ptr.is_null());
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&*(ptr as *mut CapsFeaturesRef)
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}
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pub unsafe fn from_glib_borrow_mut<'a>(
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ptr: *mut ffi::GstCapsFeatures,
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) -> &'a mut CapsFeaturesRef {
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assert!(!ptr.is_null());
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&mut *(ptr as *mut CapsFeaturesRef)
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}
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pub unsafe fn as_ptr(&self) -> *const ffi::GstCapsFeatures {
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self as *const Self as *const ffi::GstCapsFeatures
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}
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pub unsafe fn as_mut_ptr(&self) -> *mut ffi::GstCapsFeatures {
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self as *const Self as *mut ffi::GstCapsFeatures
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}
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pub fn is_empty(&self) -> bool {
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self.size() == 0 && !self.is_any()
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}
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pub fn is_any(&self) -> bool {
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unsafe { from_glib(ffi::gst_caps_features_is_any(self.as_ptr())) }
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}
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pub fn contains(&self, feature: &str) -> bool {
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unsafe {
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from_glib(ffi::gst_caps_features_contains(
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self.as_ptr(),
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feature.to_glib_none().0,
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))
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}
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}
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pub fn size(&self) -> u32 {
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unsafe { ffi::gst_caps_features_get_size(self.as_ptr()) }
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}
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pub fn nth(&self, idx: u32) -> Option<&str> {
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if idx >= self.size() {
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return None;
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}
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unsafe {
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let feature = ffi::gst_caps_features_get_nth(self.as_ptr(), idx);
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if feature.is_null() {
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return None;
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}
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Some(CStr::from_ptr(feature).to_str().unwrap())
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}
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}
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pub fn add(&mut self, feature: &str) {
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unsafe { ffi::gst_caps_features_add(self.as_mut_ptr(), feature.to_glib_none().0) }
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}
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pub fn remove(&mut self, feature: &str) {
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unsafe { ffi::gst_caps_features_remove(self.as_mut_ptr(), feature.to_glib_none().0) }
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}
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pub fn iter(&self) -> Iter {
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Iter::new(self)
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}
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// This is not an equivalence relation with regards to ANY. Everything is equal to ANY
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pub fn is_equal(&self, other: &CapsFeaturesRef) -> bool {
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unsafe {
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from_glib(ffi::gst_caps_features_is_equal(
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self.as_ptr(),
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other.as_ptr(),
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))
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}
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}
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}
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impl glib::types::StaticType for CapsFeaturesRef {
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fn static_type() -> glib::types::Type {
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unsafe { from_glib(ffi::gst_structure_get_type()) }
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}
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}
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impl<'a> glib::value::FromValueOptional<'a> for &'a CapsFeaturesRef {
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unsafe fn from_value_optional(v: &'a glib::Value) -> Option<Self> {
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let ptr = glib::gobject_ffi::g_value_get_boxed(v.to_glib_none().0);
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if ptr.is_null() {
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None
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} else {
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Some(CapsFeaturesRef::from_glib_borrow(
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ptr as *const ffi::GstCapsFeatures,
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))
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}
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}
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}
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impl glib::value::SetValue for CapsFeaturesRef {
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unsafe fn set_value(v: &mut glib::Value, s: &Self) {
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glib::gobject_ffi::g_value_set_boxed(v.to_glib_none_mut().0, s.as_ptr() as gpointer);
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}
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}
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impl glib::value::SetValueOptional for CapsFeaturesRef {
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unsafe fn set_value_optional(v: &mut glib::Value, s: Option<&Self>) {
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if let Some(s) = s {
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glib::gobject_ffi::g_value_set_boxed(v.to_glib_none_mut().0, s.as_ptr() as gpointer);
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} else {
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glib::gobject_ffi::g_value_set_boxed(v.to_glib_none_mut().0, ptr::null_mut());
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}
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}
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}
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#[derive(Debug)]
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pub struct Iter<'a> {
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caps_features: &'a CapsFeaturesRef,
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idx: u32,
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n_features: u32,
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}
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impl<'a> Iter<'a> {
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fn new(caps_features: &'a CapsFeaturesRef) -> Iter<'a> {
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skip_assert_initialized!();
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let n_features = caps_features.size();
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Iter {
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caps_features,
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idx: 0,
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n_features,
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}
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}
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}
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impl<'a> Iterator for Iter<'a> {
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type Item = &'a str;
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fn next(&mut self) -> Option<Self::Item> {
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if self.idx >= self.n_features {
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return None;
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}
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unsafe {
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let feature = ffi::gst_caps_features_get_nth(self.caps_features.as_ptr(), self.idx);
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if feature.is_null() {
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return None;
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}
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self.idx += 1;
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Some(CStr::from_ptr(feature).to_str().unwrap())
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}
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}
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fn size_hint(&self) -> (usize, Option<usize>) {
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if self.idx == self.n_features {
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return (0, Some(0));
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}
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let remaining = (self.n_features - self.idx) as usize;
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(remaining, Some(remaining))
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}
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}
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impl<'a> DoubleEndedIterator for Iter<'a> {
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fn next_back(&mut self) -> Option<Self::Item> {
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if self.idx == self.n_features {
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return None;
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}
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self.n_features -= 1;
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unsafe {
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let feature =
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ffi::gst_caps_features_get_nth(self.caps_features.as_ptr(), self.n_features);
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if feature.is_null() {
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return None;
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}
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Some(CStr::from_ptr(feature).to_str().unwrap())
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}
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}
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}
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impl<'a> ExactSizeIterator for Iter<'a> {}
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impl fmt::Debug for CapsFeaturesRef {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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f.debug_tuple("CapsFeatures")
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.field(&self.to_string())
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.finish()
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}
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}
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impl fmt::Display for CapsFeaturesRef {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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let s = unsafe {
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glib::GString::from_glib_full(ffi::gst_caps_features_to_string(self.as_ptr()))
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};
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f.write_str(&s)
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}
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}
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impl ToOwned for CapsFeaturesRef {
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type Owned = CapsFeatures;
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fn to_owned(&self) -> CapsFeatures {
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unsafe { from_glib_full(ffi::gst_caps_features_copy(self.as_ptr() as *const _) as *mut _) }
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}
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}
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unsafe impl Sync for CapsFeaturesRef {}
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unsafe impl Send for CapsFeaturesRef {}
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pub static CAPS_FEATURE_MEMORY_SYSTEM_MEMORY: Lazy<&'static str> = Lazy::new(|| unsafe {
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CStr::from_ptr(ffi::GST_CAPS_FEATURE_MEMORY_SYSTEM_MEMORY)
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.to_str()
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.unwrap()
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});
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pub static CAPS_FEATURES_MEMORY_SYSTEM_MEMORY: Lazy<CapsFeatures> =
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Lazy::new(|| CapsFeatures::new(&[*CAPS_FEATURE_MEMORY_SYSTEM_MEMORY]));
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn test_from_value_optional() {
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crate::init().unwrap();
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let a = glib::value::Value::from(None::<&CapsFeatures>);
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assert!(a.get::<CapsFeatures>().unwrap().is_none());
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let b = glib::value::Value::from(&CapsFeatures::new_empty());
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assert!(b.get::<CapsFeatures>().unwrap().is_some());
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}
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}
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