1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
// Take a look at the license at the top of the repository in the LICENSE file.

use glib::prelude::*;
use glib::signal::SignalHandlerId;
use glib::translate::*;

use crate::ClockTime;
use crate::ObjectFlags;

pub trait GstObjectExtManual: 'static {
    #[doc(alias = "deep-notify")]
    fn connect_deep_notify<F: Fn(&Self, &crate::Object, &glib::ParamSpec) + Send + Sync + 'static>(
        &self,
        name: Option<&str>,
        f: F,
    ) -> SignalHandlerId;

    fn set_object_flags(&self, flags: ObjectFlags);

    fn unset_object_flags(&self, flags: ObjectFlags);

    #[doc(alias = "get_object_flags")]
    fn object_flags(&self) -> ObjectFlags;

    #[doc(alias = "get_g_value_array")]
    #[doc(alias = "gst_object_get_g_value_array")]
    fn g_value_array(
        &self,
        property_name: &str,
        timestamp: ClockTime,
        interval: ClockTime,
        values: &mut [glib::Value],
    ) -> Result<(), glib::error::BoolError>;
}

impl<O: IsA<crate::Object>> GstObjectExtManual for O {
    fn connect_deep_notify<
        F: Fn(&Self, &crate::Object, &glib::ParamSpec) + Send + Sync + 'static,
    >(
        &self,
        name: Option<&str>,
        f: F,
    ) -> SignalHandlerId {
        let signal_name = if let Some(name) = name {
            format!("deep-notify::{}", name)
        } else {
            "deep-notify".into()
        };

        let obj: Borrowed<glib::Object> =
            unsafe { from_glib_borrow(self.as_ptr() as *mut glib::gobject_ffi::GObject) };

        obj.connect(signal_name.as_str(), false, move |values| {
            // It would be nice to display the actual signal name in the panic messages below,
            // but that would require to copy `signal_name` so as to move it into the closure
            // which seems too much for the messages of development errors
            let obj: O = unsafe {
                values[0]
                    .get::<crate::Object>()
                    .unwrap_or_else(|err| {
                        panic!("Object signal \"deep-notify\": values[0]: {}", err)
                    })
                    .unsafe_cast()
            };
            let prop_obj: crate::Object = values[1]
                .get()
                .unwrap_or_else(|err| panic!("Object signal \"deep-notify\": values[1]: {}", err));

            let pspec = unsafe {
                let pspec = glib::gobject_ffi::g_value_get_param(values[2].to_glib_none().0);
                from_glib_none(pspec)
            };

            f(&obj, &prop_obj, &pspec);

            None
        })
    }

    fn set_object_flags(&self, flags: ObjectFlags) {
        unsafe {
            let ptr: *mut ffi::GstObject = self.as_ptr() as *mut _;
            let _guard = crate::utils::MutexGuard::lock(&(*ptr).lock);
            (*ptr).flags |= flags.into_glib();
        }
    }

    fn unset_object_flags(&self, flags: ObjectFlags) {
        unsafe {
            let ptr: *mut ffi::GstObject = self.as_ptr() as *mut _;
            let _guard = crate::utils::MutexGuard::lock(&(*ptr).lock);
            (*ptr).flags &= !flags.into_glib();
        }
    }

    fn object_flags(&self) -> ObjectFlags {
        unsafe {
            let ptr: *mut ffi::GstObject = self.as_ptr() as *mut _;
            let _guard = crate::utils::MutexGuard::lock(&(*ptr).lock);
            from_glib((*ptr).flags)
        }
    }

    fn g_value_array(
        &self,
        property_name: &str,
        timestamp: ClockTime,
        interval: ClockTime,
        values: &mut [glib::Value],
    ) -> Result<(), glib::error::BoolError> {
        let n_values = values.len() as u32;
        unsafe {
            glib::result_from_gboolean!(
                ffi::gst_object_get_g_value_array(
                    self.as_ref().to_glib_none().0,
                    property_name.to_glib_none().0,
                    timestamp.into_glib(),
                    interval.into_glib(),
                    n_values,
                    values.as_mut_ptr() as *mut glib::gobject_ffi::GValue,
                ),
                "Failed to get value array"
            )
        }
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::prelude::*;
    use std::sync::{Arc, Mutex};

    #[test]
    fn test_deep_notify() {
        crate::init().unwrap();

        let bin = crate::Bin::new(None);
        let identity = crate::ElementFactory::make("identity")
            .name("id")
            .build()
            .unwrap();
        bin.add(&identity).unwrap();

        let notify = Arc::new(Mutex::new(None));
        let notify_clone = notify.clone();
        bin.connect_deep_notify(None, move |_, id, prop| {
            *notify_clone.lock().unwrap() = Some((id.clone(), prop.name()));
        });

        identity.set_property("silent", false);
        assert_eq!(
            *notify.lock().unwrap(),
            Some((identity.upcast::<crate::Object>(), "silent"))
        );
    }
}