3 files changed, 37 insertions, 13 deletions

diff --git a/components/script/dom/bindings/codegen/CodegenRust.py b/components/script/dom/bindings/codegen/CodegenRust.py
index dea6e104213..1bd01651e76 100644
--- a/components/script/dom/bindings/codegen/CodegenRust.py
+++ b/components/script/dom/bindings/codegen/CodegenRust.py
@@ -2379,6 +2379,7 @@ def UnionTypes(descriptors, dictionaries, callbacks, typedefs, config):
         'crate::dom::bindings::conversions::root_from_handlevalue',
         'std::ptr::NonNull',
         'crate::dom::bindings::mozmap::MozMap',
+        'crate::dom::bindings::num::Finite',
         'crate::dom::bindings::root::DomRoot',
         'crate::dom::bindings::str::ByteString',
         'crate::dom::bindings::str::DOMString',
diff --git a/components/script/dom/mediadevices.rs b/components/script/dom/mediadevices.rs
index 313efa3b13d..b89762c3779 100644
--- a/components/script/dom/mediadevices.rs
+++ b/components/script/dom/mediadevices.rs
@@ -6,6 +6,7 @@ use crate::dom::bindings::codegen::Bindings::MediaDevicesBinding::MediaStreamCon
 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::codegen::UnionTypes::DoubleOrConstrainDoubleRange as ConstrainDouble;
 use crate::dom::bindings::reflector::reflect_dom_object;
 use crate::dom::bindings::reflector::DomObject;
 use crate::dom::bindings::root::DomRoot;
@@ -69,7 +70,9 @@ fn convert_constraints(js: &BooleanOrMediaTrackConstraints) -> Option<MediaTrack
             Some(MediaTrackConstraintSet {
                 height: convert_culong(&c.parent.height),
                 width: convert_culong(&c.parent.width),
-                ..Default::default()
+                aspect: convert_cdouble(&c.parent.aspectRatio),
+                frame_rate: convert_cdouble(&c.parent.frameRate),
+                sample_rate: convert_culong(&c.parent.sampleRate),
             })
         },
     }
@@ -94,3 +97,23 @@ fn convert_culong(js: &ConstrainULong) -> Option<Constrain<u32>> {
         },
     }
 }
+
+fn convert_cdouble(js: &ConstrainDouble) -> Option<Constrain<f64>> {
+    match js {
+        ConstrainDouble::Double(val) => Some(Constrain::Value(**val)),
+        ConstrainDouble::ConstrainDoubleRange(ref range) => {
+            if range.parent.min.is_some() || range.parent.max.is_some() {
+                Some(Constrain::Range(ConstrainRange {
+                    min: range.parent.min.map(|x| *x),
+                    max: range.parent.max.map(|x| *x),
+                    ideal: range.ideal.map(|x| *x),
+                }))
+            } else if let Some(exact) = range.exact {
+                Some(Constrain::Value(*exact))
+            } else {
+                // the unspecified case is treated as all three being none
+                None
+            }
+        },
+    }
+}
diff --git a/components/script/dom/webidls/MediaDevices.webidl b/components/script/dom/webidls/MediaDevices.webidl
index 4c3a7dedbd2..e439a80c512 100644
--- a/components/script/dom/webidls/MediaDevices.webidl
+++ b/components/script/dom/webidls/MediaDevices.webidl
@@ -29,15 +29,15 @@ dictionary MediaStreamConstraints {
         // (boolean or MediaTrackConstraints) audio = false;
 };
 
-// dictionary DoubleRange {
-//              double max;
-//              double min;
-// };
+dictionary DoubleRange {
+             double max;
+             double min;
+};
 
-// dictionary ConstrainDoubleRange : DoubleRange {
-//              double exact;
-//              double ideal;
-// };
+dictionary ConstrainDoubleRange : DoubleRange {
+             double exact;
+             double ideal;
+};
 
 dictionary ULongRange {
              [Clamp] unsigned long max;
@@ -64,19 +64,19 @@ dictionary MediaTrackConstraints : MediaTrackConstraintSet {
 };
 
 typedef ([Clamp] unsigned long or ConstrainULongRange) ConstrainULong;
-// typedef (double or ConstrainDoubleRange) ConstrainDouble;
+typedef (double or ConstrainDoubleRange) ConstrainDouble;
 // typedef (boolean or ConstrainBooleanParameters) ConstrainBoolean;
 // typedef (DOMString or sequence<DOMString> or ConstrainDOMStringParameters) ConstrainDOMString;
 
 dictionary MediaTrackConstraintSet {
              ConstrainULong width;
              ConstrainULong height;
-             // ConstrainDouble aspectRatio;
-             // ConstrainDouble frameRate;
+             ConstrainDouble aspectRatio;
+             ConstrainDouble frameRate;
              // ConstrainDOMString facingMode;
              // ConstrainDOMString resizeMode;
              // ConstrainDouble volume;
-             // ConstrainULong sampleRate;
+             ConstrainULong sampleRate;
              // ConstrainULong sampleSize;
              // ConstrainBoolean echoCancellation;
              // ConstrainBoolean autoGainControl;