1// Take a look at the license at the top of the repository in the LICENSE file.
2
3use glib::{prelude::*, subclass::prelude::*, translate::*};
4
5use super::prelude::*;
6use crate::{ffi, Bin, Element, LoggableError, Message};
7
8pub trait BinImpl: BinImplExt + ElementImpl {
9 fn add_element(&self, element: &Element) -> Result<(), LoggableError> {
10 self.parent_add_element(element)
11 }
12
13 fn remove_element(&self, element: &Element) -> Result<(), LoggableError> {
14 self.parent_remove_element(element)
15 }
16
17 fn do_latency(&self) -> Result<(), LoggableError> {
18 self.parent_do_latency()
19 }
20
21 fn handle_message(&self, message: Message) {
22 self.parent_handle_message(message)
23 }
24}
25
26mod sealed {
27 pub trait Sealed {}
28 impl<T: super::BinImplExt> Sealed for T {}
29}
30
31pub trait BinImplExt: sealed::Sealed + ObjectSubclass {
32 fn parent_add_element(&self, element: &Element) -> Result<(), LoggableError> {
33 unsafe {
34 let data = Self::type_data();
35 let parent_class = data.as_ref().parent_class() as *mut ffi::GstBinClass;
36 let f = (*parent_class).add_element.ok_or_else(|| {
37 loggable_error!(
38 crate::CAT_RUST,
39 "Parent function `add_element` is not defined"
40 )
41 })?;
42 result_from_gboolean!(
43 f(
44 self.obj().unsafe_cast_ref::<crate::Bin>().to_glib_none().0,
45 element.to_glib_none().0
46 ),
47 crate::CAT_RUST,
48 "Failed to add the element using the parent function"
49 )
50 }
51 }
52
53 fn parent_remove_element(&self, element: &Element) -> Result<(), LoggableError> {
54 unsafe {
55 let data = Self::type_data();
56 let parent_class = data.as_ref().parent_class() as *mut ffi::GstBinClass;
57 let f = (*parent_class).remove_element.ok_or_else(|| {
58 loggable_error!(
59 crate::CAT_RUST,
60 "Parent function `remove_element` is not defined"
61 )
62 })?;
63 result_from_gboolean!(
64 f(
65 self.obj().unsafe_cast_ref::<crate::Bin>().to_glib_none().0,
66 element.to_glib_none().0
67 ),
68 crate::CAT_RUST,
69 "Failed to remove the element using the parent function"
70 )
71 }
72 }
73
74 fn parent_do_latency(&self) -> Result<(), LoggableError> {
75 unsafe {
76 let data = Self::type_data();
77 let parent_class = data.as_ref().parent_class() as *mut ffi::GstBinClass;
78 let f = (*parent_class).do_latency.ok_or_else(|| {
79 loggable_error!(
80 crate::CAT_RUST,
81 "Parent function `do_latency` is not defined"
82 )
83 })?;
84 result_from_gboolean!(
85 f(self.obj().unsafe_cast_ref::<crate::Bin>().to_glib_none().0,),
86 crate::CAT_RUST,
87 "Failed to update latency using the parent function"
88 )
89 }
90 }
91
92 fn parent_handle_message(&self, message: Message) {
93 unsafe {
94 let data = Self::type_data();
95 let parent_class = data.as_ref().parent_class() as *mut ffi::GstBinClass;
96 if let Some(ref f) = (*parent_class).handle_message {
97 f(
98 self.obj().unsafe_cast_ref::<crate::Bin>().to_glib_none().0,
99 message.into_glib_ptr(),
100 );
101 }
102 }
103 }
104}
105
106impl<T: BinImpl> BinImplExt for T {}
107
108unsafe impl<T: BinImpl> IsSubclassable<T> for Bin {
109 fn class_init(klass: &mut glib::Class<Self>) {
110 Self::parent_class_init::<T>(class:klass);
111 let klass: &mut GstBinClass = klass.as_mut();
112 klass.add_element = Some(bin_add_element::<T>);
113 klass.remove_element = Some(bin_remove_element::<T>);
114 klass.do_latency = Some(bin_do_latency::<T>);
115 klass.handle_message = Some(bin_handle_message::<T>);
116 }
117}
118
119unsafe extern "C" fn bin_add_element<T: BinImpl>(
120 ptr: *mut ffi::GstBin,
121 element: *mut ffi::GstElement,
122) -> glib::ffi::gboolean {
123 let instance: &::Instance = &*(ptr as *mut T::Instance);
124 let imp: &T = instance.imp();
125
126 panic_to_errorbool!(imp, false, {
127 match imp.add_element(&from_glib_none(element)) {
128 Ok(()) => true,
129 Err(err) => {
130 err.log_with_imp(imp);
131 false
132 }
133 }
134 })
135 .into_glib()
136}
137
138unsafe extern "C" fn bin_remove_element<T: BinImpl>(
139 ptr: *mut ffi::GstBin,
140 element: *mut ffi::GstElement,
141) -> glib::ffi::gboolean {
142 let instance: &::Instance = &*(ptr as *mut T::Instance);
143 let imp: &T = instance.imp();
144
145 // If we get a floating reference passed simply return FALSE here. It can't be
146 // stored inside this bin, and if we continued to use it we would take ownership
147 // of this floating reference.
148 if glib::gobject_ffi::g_object_is_floating(object:element as *mut glib::gobject_ffi::GObject)
149 != glib::ffi::GFALSE
150 {
151 return glib::ffi::GFALSE;
152 }
153
154 panic_to_errorbool!(imp, false, {
155 match imp.remove_element(&from_glib_none(element)) {
156 Ok(()) => true,
157 Err(err) => {
158 err.log_with_imp(imp);
159 false
160 }
161 }
162 })
163 .into_glib()
164}
165
166unsafe extern "C" fn bin_do_latency<T: BinImpl>(ptr: *mut ffi::GstBin) -> glib::ffi::gboolean {
167 let instance: &::Instance = &*(ptr as *mut T::Instance);
168 let imp: &T = instance.imp();
169
170 panic_to_errorbool!(imp, false, {
171 match imp.do_latency() {
172 Ok(()) => true,
173 Err(err) => {
174 err.log_with_imp(imp);
175 false
176 }
177 }
178 })
179 .into_glib()
180}
181
182unsafe extern "C" fn bin_handle_message<T: BinImpl>(
183 ptr: *mut ffi::GstBin,
184 message: *mut ffi::GstMessage,
185) {
186 let instance: &::Instance = &*(ptr as *mut T::Instance);
187 let imp: &T = instance.imp();
188
189 panic_to_error!(imp, (), { imp.handle_message(from_glib_full(message)) });
190}
191