Auto merge of #22874 - Manishearth:constraint, r=jdm

Add support for MediaTrackConstraints This uses the WebIDL attributes-on-types support landed in https://github.com/servo/servo/pull/22958 to fill out the MediaTrackConstraints dictionary for constraints that servo-media supports. r? @jdm  --- This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/22874)
2025-08-03 12:40:06 +01:00 · 2019-03-04 10:28:57 -05:00 · 2019-03-04 10:28:57 -05:00 · 0f3108ce79
commit 0f3108ce79
parent 28c6dec62d ce635b715b
3 changed files with 115 additions and 48 deletions
--- a/components/script/dom/bindings/codegen/CodegenRust.py
+++ b/components/script/dom/bindings/codegen/CodegenRust.py
@ -747,7 +747,15 @@ def getJSToNativeConversionInfo(type, descriptorProvider, failureCode=None,
            for memberType in type.unroll().flatMemberTypes
            if memberType.isDictionary()
        ]
-        if dictionaries:
+        if defaultValue and not isinstance(defaultValue, IDLNullValue):
+            tag = defaultValue.type.tag()
+            if tag is IDLType.Tags.bool:
+                default = "%s::Boolean(%s)" % (
+                    union_native_type(type),
+                    "true" if defaultValue.value else "false")
+            else:
+                raise("We don't currently support default values that aren't null or boolean")
+        elif dictionaries:
            if defaultValue:
                assert isinstance(defaultValue, IDLNullValue)
                dictionary, = dictionaries
@ -2379,6 +2387,7 @@ 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',
--- a/components/script/dom/mediadevices.rs
+++ b/components/script/dom/mediadevices.rs
@ -4,6 +4,9 @@

 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::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;
@ -12,6 +15,7 @@ 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 +46,13 @@ 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 +61,59 @@ 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),
+                aspect: convert_cdouble(&c.parent.aspectRatio),
+                frame_rate: convert_cdouble(&c.parent.frameRate),
+                sample_rate: convert_culong(&c.parent.sampleRate),
+            })
+        },
+    }
+}
+
+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
+            }
+        },
+    }
+}
+
+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
+            }
+        },
+    }
+}
--- a/components/script/dom/webidls/MediaDevices.webidl
+++ b/components/script/dom/webidls/MediaDevices.webidl
@ -23,31 +23,29 @@ partial interface MediaDevices {


 dictionary MediaStreamConstraints {
-    //         (boolean or MediaTrackConstraints) video = false;
-    //         (boolean or MediaTrackConstraints) audio = false;
-                boolean video = false;
-                boolean audio = false;
+        (boolean or MediaTrackConstraints) video = false;
+        (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;
-//              [Clamp] unsigned long min;
-// };
+dictionary ULongRange {
+             [Clamp] unsigned long max;
+             [Clamp] unsigned long min;
+};

-// dictionary ConstrainULongRange : ULongRange {
-//              [Clamp] unsigned long exact;
-//              [Clamp] unsigned long ideal;
-// };
+dictionary ConstrainULongRange : ULongRange {
+             [Clamp] unsigned long exact;
+             [Clamp] unsigned long ideal;
+};

 // dictionary ConstrainBooleanParameters {
 //              boolean exact;
@ -59,30 +57,30 @@ dictionary MediaStreamConstraints {
 //              (DOMString or sequence<DOMString>) ideal;
 // };

-// dictionary MediaTrackConstraints : MediaTrackConstraintSet {
-//              sequence<MediaTrackConstraintSet> advanced;
-// };
+dictionary MediaTrackConstraints : MediaTrackConstraintSet {
+             sequence<MediaTrackConstraintSet> advanced;
+};

-// typedef ([Clamp] unsigned long or ConstrainULongRange) ConstrainULong;
-// typedef (double or ConstrainDoubleRange) ConstrainDouble;
+typedef ([Clamp] unsigned long or ConstrainULongRange) ConstrainULong;
+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;
-//              ConstrainDOMString facingMode;
-//              ConstrainDOMString resizeMode;
-//              ConstrainDouble volume;
-//              ConstrainULong sampleRate;
-//              ConstrainULong sampleSize;
-//              ConstrainBoolean echoCancellation;
-//              ConstrainBoolean autoGainControl;
-//              ConstrainBoolean noiseSuppression;
-//              ConstrainDouble latency;
-//              ConstrainULong channelCount;
-//              ConstrainDOMString deviceId;
-//              ConstrainDOMString groupId;
-// };
+dictionary MediaTrackConstraintSet {
+             ConstrainULong width;
+             ConstrainULong height;
+             ConstrainDouble aspectRatio;
+             ConstrainDouble frameRate;
+             // ConstrainDOMString facingMode;
+             // ConstrainDOMString resizeMode;
+             // ConstrainDouble volume;
+             ConstrainULong sampleRate;
+             // ConstrainULong sampleSize;
+             // ConstrainBoolean echoCancellation;
+             // ConstrainBoolean autoGainControl;
+             // ConstrainBoolean noiseSuppression;
+             // ConstrainDouble latency;
+             // ConstrainULong channelCount;
+             // ConstrainDOMString deviceId;
+             // ConstrainDOMString groupId;
+};