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Merge pull request #41 from sdroege/calculate-linear-regression

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Depend on gstreamer 0.14.4 for gst::calculate_linear_regression()
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Ruben Gonzalez 2019-08-30 08:13:48 +02:00 committed by GitHub
commit 732100f293
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3 changed files with 2 additions and 49 deletions
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3
Cargo.toml
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@ -10,11 +10,10 @@ edition = "2018"
[dependencies]
glib = { version = "0.8.0", features = ["subclassing"] }
gobject-sys = "0.9"
gstreamer = { version = "0.14.3", features = ["subclassing", "v1_12"] }
gstreamer = { version = "0.14.4", features = ["subclassing", "v1_12"] }
gstreamer-base = { version = "0.14.0", features = ["subclassing"] }
gstreamer-audio = "0.14.0"
gstreamer-video = { version = "0.14.3", features = ["v1_12"] }
gstreamer-sys = "0.8"
lazy_static = "1.1.0"
byte-slice-cast = "0.2.0"

1
src/lib.rs
View file

@ -5,7 +5,6 @@ use glib::prelude::*;
extern crate gstreamer as gst;
extern crate gstreamer_audio as gst_audio;
extern crate gstreamer_base as gst_base;
extern crate gstreamer_sys as gst_sys;
extern crate gstreamer_video as gst_video;
#[macro_use]

47
src/receiver.rs
View file

@ -233,7 +233,7 @@ impl Observations {
values.push(time);
if let Some((num, den, b, xbase, r_squared)) =
calculate_linear_regression(values, Some(values_tmp))
gst::calculate_linear_regression(values, Some(values_tmp))
{
next_mapping.xbase = xbase;
next_mapping.b = b;
@ -1722,48 +1722,3 @@ impl Receiver<AudioReceiver> {
Ok(buffer)
}
}
// FIXME: Requires https://gitlab.freedesktop.org/gstreamer/gstreamer-rs/merge_requests/307
pub fn calculate_linear_regression(
xy: &[(u64, u64)],
temp: Option<&mut [(u64, u64)]>,
) -> Option<(u64, u64, u64, u64, f64)> {
unsafe {
use glib::translate::from_glib;
use std::mem;
use std::ptr;
assert_eq!(mem::size_of::<u64>() * 2, mem::size_of::<(u64, u64)>());
assert_eq!(mem::align_of::<u64>(), mem::align_of::<(u64, u64)>());
assert!(temp.as_ref().map(|temp| temp.len()).unwrap_or(xy.len()) >= xy.len());
let mut m_num = mem::MaybeUninit::uninit();
let mut m_denom = mem::MaybeUninit::uninit();
let mut b = mem::MaybeUninit::uninit();
let mut xbase = mem::MaybeUninit::uninit();
let mut r_squared = mem::MaybeUninit::uninit();
let res = from_glib(gst_sys::gst_calculate_linear_regression(
xy.as_ptr() as *const u64,
temp.map(|temp| temp.as_mut_ptr() as *mut u64)
.unwrap_or(ptr::null_mut()),
xy.len() as u32,
m_num.as_mut_ptr(),
m_denom.as_mut_ptr(),
b.as_mut_ptr(),
xbase.as_mut_ptr(),
r_squared.as_mut_ptr(),
));
if res {
Some((
m_num.assume_init(),
m_denom.assume_init(),
b.assume_init(),
xbase.assume_init(),
r_squared.assume_init(),
))
} else {
None
}
}
}