Introduce sender and receiver transforms

Author: youennf

index.bs

@@ -81,15 +81,16 @@ It uses an additional API on {{RTCRtpSender}} and {{RTCRtpReceiver}} to
 insert the processing into the pipeline.
 
 <pre class="idl">
-typedef (SFrameTransform or RTCRtpScriptTransform) RTCRtpTransform;
+typedef (SFrameSenderTransform or RTCRtpScriptTransform) RTCRtpSenderTransform;
+typedef (SFrameReceiverTransform or RTCRtpScriptTransform) RTCRtpReceierTransform;
 
 // New methods for RTCRtpSender and RTCRtpReceiver
 partial interface RTCRtpSender {
-    attribute RTCRtpTransform? transform;
+    attribute RTCRtpSenderTransform? transform;
 };
 
 partial interface RTCRtpReceiver {
-    attribute RTCRtpTransform? transform;
+    attribute RTCRtpReceiverTransform? transform;
 };
 </pre>
 
@@ -214,7 +215,7 @@ There is no guarantee on which frame will happen the switch from the previous tr
 If a web application sets the transform synchronously at creation of the {{RTCRtpSender}} (for instance when calling addTrack), the transform will receive the first frame generated by the {{RTCRtpSender}}'s encoder.
 Similarly, if a web application sets the transform synchronously at creation of the {{RTCRtpReceiver}} (for instance when calling addTrack, or at track event handler), the transform will receive the first full frame generated by the {{RTCRtpReceiver}}'s packetizer.
 
-# SFrameTransform # {#sframe}
+# SFrame transforms # {#sframe}
 
 <p>
 The APIs presented in this section allow applications to process SFrame data using specific cipher suites defined in [[RFC9605]].
@@ -249,10 +250,16 @@ interface mixin SFrameDecrypterManagement {
 };
 
 [Exposed=Window]
-interface SFrameTransform : EventTarget {
+interface SFrameSenderTransform {
     constructor(optional SFrameTransformOptions options = {});
 };
-SFrameTransform includes SFrameKeyManagement;
+SFrameSenderTransform includes SFrameEncrypterKeyManagement;
+
+[Exposed=Window]
+interface SFrameReceiverTransform : EventTarget {
+    constructor(optional SFrameTransformOptions options = {});
+};
+SFrameReceiverTransform includes SFrameDecrypterKeyManagement;
 
 [Exposed=(Window,DedicatedWorker)]
 interface SFrameEncrypterStream : EventTarget {
@@ -290,9 +297,15 @@ dictionary SFrameTransformErrorEventInit : EventInit {
 };
 </xmp>
 
-The <dfn constructor for="SFrameTransform" lt="SFrameTransform(options)"><code>new SFrameTransform(<var>options</var>)</code></dfn> constructor steps are:
+The <dfn constructor for="SFrameSenderTransform" lt="SFrameSenderTransform(options)"><code>new SFrameSenderTransform(<var>options</var>)</code></dfn> constructor steps are:
 1. Let |options| be the method's first argument.
 1. Run the [=SFrame initialization algorithm=] with |this| and |options|.
+1. Set |this|.`[[role]]` to 'encrypt'.
+
+The <dfn constructor for="SFrameReceiverTransform" lt="SFrameReceiverTransform(options)"><code>new SFrameReceiverTransform(<var>options</var>)</code></dfn> constructor steps are:
+1. Let |options| be the method's first argument.
+1. Run the [=SFrame initialization algorithm=] with |this| and |options|.
+1. Set |this|.`[[role]]` to 'decrypt'.
 
 The <dfn constructor for="SFrameEncrypterStream" lt="SFrameEncrypterStream(options)"><code>new SFrameEncrypterStream(<var>options</var>)</code></dfn> constructor steps are:
 1. Let |options| be the method's first argument.