1// Take a look at the license at the top of the repository in the LICENSE file.
2
3use std::ptr;
4
5use glib::translate::*;
6
7#[cfg(feature = "v1_18")]
8#[cfg_attr(docsrs, doc(cfg(feature = "v1_18")))]
9use crate::Tracer;
10
11// import only functions which do not have their own module as namespace
12pub use crate::auto::functions::{
13 main_executable_path, util_get_timestamp as get_timestamp, version, version_string,
14};
15use crate::ffi;
16
17#[doc(alias = "gst_calculate_linear_regression")]
18pub fn calculate_linear_regression(
19 xy: &[(u64, u64)],
20 temp: Option<&mut [(u64, u64)]>,
21) -> Option<(u64, u64, u64, u64, f64)> {
22 skip_assert_initialized!();
23 use std::mem;
24
25 unsafe {
26 assert_eq!(mem::size_of::<u64>() * 2, mem::size_of::<(u64, u64)>());
27 assert_eq!(mem::align_of::<u64>(), mem::align_of::<(u64, u64)>());
28 assert!(
29 temp.as_ref()
30 .map(|temp| temp.len())
31 .unwrap_or_else(|| xy.len())
32 >= xy.len()
33 );
34
35 let mut m_num = mem::MaybeUninit::uninit();
36 let mut m_denom = mem::MaybeUninit::uninit();
37 let mut b = mem::MaybeUninit::uninit();
38 let mut xbase = mem::MaybeUninit::uninit();
39 let mut r_squared = mem::MaybeUninit::uninit();
40
41 let res = from_glib(ffi::gst_calculate_linear_regression(
42 xy.as_ptr() as *const u64,
43 temp.map(|temp| temp.as_mut_ptr() as *mut u64)
44 .unwrap_or(ptr::null_mut()),
45 xy.len() as u32,
46 m_num.as_mut_ptr(),
47 m_denom.as_mut_ptr(),
48 b.as_mut_ptr(),
49 xbase.as_mut_ptr(),
50 r_squared.as_mut_ptr(),
51 ));
52 if res {
53 Some((
54 m_num.assume_init(),
55 m_denom.assume_init(),
56 b.assume_init(),
57 xbase.assume_init(),
58 r_squared.assume_init(),
59 ))
60 } else {
61 None
62 }
63 }
64}
65
66#[cfg(feature = "v1_18")]
67#[cfg_attr(docsrs, doc(cfg(feature = "v1_18")))]
68#[doc(alias = "gst_tracing_get_active_tracers")]
69pub fn active_tracers() -> glib::List<Tracer> {
70 assert_initialized_main_thread!();
71 unsafe { FromGlibPtrContainer::from_glib_full(ffi::gst_tracing_get_active_tracers()) }
72}
73
74#[cfg(feature = "v1_24")]
75#[cfg_attr(docsrs, doc(cfg(feature = "v1_24")))]
76#[doc(alias = "gst_util_filename_compare")]
77pub fn filename_compare(a: &std::path::Path, b: &std::path::Path) -> std::cmp::Ordering {
78 skip_assert_initialized!();
79 unsafe {
80 from_glib(ffi::gst_util_filename_compare(
81 a.to_glib_none().0,
82 b.to_glib_none().0,
83 ))
84 }
85}
86
87#[cfg(test)]
88mod tests {
89 use super::*;
90
91 #[test]
92 fn test_calculate_linear_regression() {
93 crate::init().unwrap();
94
95 let values = [(0, 0), (1, 1), (2, 2), (3, 3)];
96
97 let (m_num, m_denom, b, xbase, _) = calculate_linear_regression(&values, None).unwrap();
98 assert_eq!((m_num, m_denom, b, xbase), (10, 10, 3, 3));
99
100 let mut temp = [(0, 0); 4];
101 let (m_num, m_denom, b, xbase, _) =
102 calculate_linear_regression(&values, Some(&mut temp)).unwrap();
103 assert_eq!((m_num, m_denom, b, xbase), (10, 10, 3, 3));
104 }
105}
106