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Add support for basic MediaTrackConstraints

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This commit is contained in:
Manish Goregaokar 2019-02-12 15:55:40 -08:00
parent 28c6dec62d
commit dd7b69b6d8
2 changed files with 75 additions and 38 deletions
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45
components/script/dom/mediadevices.rs
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@ -4,6 +4,8 @@
use crate::dom::bindings::codegen::Bindings::MediaDevicesBinding::MediaStreamConstraints;
use crate::dom::bindings::codegen::Bindings::MediaDevicesBinding::{self, MediaDevicesMethods};
use crate::dom::bindings::codegen::UnionTypes::BooleanOrMediaTrackConstraints;
use crate::dom::bindings::codegen::UnionTypes::ClampedUnsignedLongOrConstrainULongRange as ConstrainULong;
use crate::dom::bindings::reflector::reflect_dom_object;
use crate::dom::bindings::reflector::DomObject;
use crate::dom::bindings::root::DomRoot;
@ -12,6 +14,7 @@ use crate::dom::globalscope::GlobalScope;
use crate::dom::mediastream::MediaStream;
use crate::dom::promise::Promise;
use dom_struct::dom_struct;
use servo_media::streams::capture::{Constrain, ConstrainRange, MediaTrackConstraintSet};
use servo_media::ServoMedia;
use std::rc::Rc;
@ -42,13 +45,13 @@ impl MediaDevicesMethods for MediaDevices {
let p = Promise::new(&self.global());
let media = ServoMedia::get().unwrap();
let mut tracks = vec![];
if constraints.audio {
if let Some(audio) = media.create_audioinput_stream(Default::default()) {
if let Some(constraints) = convert_constraints(&constraints.audio) {
if let Some(audio) = media.create_audioinput_stream(constraints) {
tracks.push(audio)
}
}
if constraints.video {
if let Some(video) = media.create_videoinput_stream(Default::default()) {
if let Some(constraints) = convert_constraints(&constraints.video) {
if let Some(video) = media.create_videoinput_stream(constraints) {
tracks.push(video)
}
}
@ -57,3 +60,37 @@ impl MediaDevicesMethods for MediaDevices {
p
}
}
fn convert_constraints(js: &BooleanOrMediaTrackConstraints) -> Option<MediaTrackConstraintSet> {
match js {
BooleanOrMediaTrackConstraints::Boolean(false) => None,
BooleanOrMediaTrackConstraints::Boolean(true) => Some(Default::default()),
BooleanOrMediaTrackConstraints::MediaTrackConstraints(ref c) => {
Some(MediaTrackConstraintSet {
height: convert_culong(&c.parent.height),
width: convert_culong(&c.parent.width),
..Default::default()
})
},
}
}
fn convert_culong(js: &ConstrainULong) -> Option<Constrain<u32>> {
match js {
ConstrainULong::ClampedUnsignedLong(val) => Some(Constrain::Value(*val)),
ConstrainULong::ConstrainULongRange(ref range) => {
if range.parent.min.is_some() || range.parent.max.is_some() {
Some(Constrain::Range(ConstrainRange {
min: range.parent.min,
max: range.parent.max,
ideal: range.ideal,
}))
} else if let Some(exact) = range.exact {
Some(Constrain::Value(exact))
} else {
// the unspecified case is treated as all three being none
None
}
},
}
}