From 9f4fbab03f35b5f34231420ac167d2c15de19c3b Mon Sep 17 00:00:00 2001
From: Eduard Kuzmenko <thanwords24@gmail.com>
Date: Fri, 11 Feb 2022 21:10:04 +0400
Subject: [PATCH] Some tweaks

---
 src/lib/calls/groupCallConnectionInstance.ts | 13 +++++++++++++
 src/lib/calls/helpers/getScreenStream.ts     |  2 ++
 src/lib/calls/streamManager.ts               | 20 ++++++++++++++++++--
 3 files changed, 33 insertions(+), 2 deletions(-)

diff --git a/src/lib/calls/groupCallConnectionInstance.ts b/src/lib/calls/groupCallConnectionInstance.ts
index 7ddd6c3a..0f32ed90 100644
--- a/src/lib/calls/groupCallConnectionInstance.ts
+++ b/src/lib/calls/groupCallConnectionInstance.ts
@@ -308,6 +308,19 @@ export default class GroupCallConnectionInstance extends CallConnectionInstanceB
       });
     }
 
+    if(this.options.type === 'presentation') {
+      promise.then(() => {
+        this.connection.getTransceivers().find(transceiver => {
+          if(transceiver.sender?.track?.kind === 'video') {
+            transceiver.sender.setParameters({
+              ...transceiver.sender.getParameters(),
+              degradationPreference: 'maintain-resolution'
+            });
+          }
+        });
+      });
+    }
+
     return promise;
   }
 
diff --git a/src/lib/calls/helpers/getScreenStream.ts b/src/lib/calls/helpers/getScreenStream.ts
index de653872..41328bac 100644
--- a/src/lib/calls/helpers/getScreenStream.ts
+++ b/src/lib/calls/helpers/getScreenStream.ts
@@ -1,4 +1,6 @@
 export default async function getScreenStream(constraints: DisplayMediaStreamConstraints) {
   const screenStream = await navigator.mediaDevices.getDisplayMedia(constraints);
+  const track = screenStream.getVideoTracks()[0];
+  track.contentHint = 'text';
   return screenStream;
 }
diff --git a/src/lib/calls/streamManager.ts b/src/lib/calls/streamManager.ts
index c03ac195..fb4e39be 100644
--- a/src/lib/calls/streamManager.ts
+++ b/src/lib/calls/streamManager.ts
@@ -266,9 +266,18 @@ export default class StreamManager {
     // const direction: RTCRtpTransceiverInit['direction'] = 'sendrecv';
     // const direction: RTCRtpTransceiverInit['direction'] = 'sendonly';
     const transceiverInit: RTCRtpTransceiverInit = {direction, streams: [inputStream]};
+    const transceiverAudioInit: RTCRtpTransceiverInit = {...transceiverInit};
+    const transceiverVideoInit: RTCRtpTransceiverInit = {...transceiverInit};
+
+    // if(this.isScreenSharingManager) {
+    //   transceiverVideoInit.sendEncodings = [{}];
+    // } else {
+    //   transceiverVideoInit.sendEncodings = [{maxBitrate: 2500000}];
+    // }
+
     const types: ['audio' | 'video', RTCRtpTransceiverInit][] = [
-      ['audio' as const, transceiverInit], 
-      ['video' as const, transceiverInit/* {sendEncodings: [{maxBitrate: 2500000}], ...transceiverInit} */]
+      ['audio' as const, transceiverAudioInit], 
+      ['video' as const, transceiverVideoInit]
     ];
 
     const tracks = inputStream.getTracks();
@@ -290,6 +299,13 @@ export default class StreamManager {
       let {transceiver} = entry;
       if(!transceiver) {
         transceiver = entry.createTransceiver(conference.connection, transceiverInit);
+
+        /* if(this.isScreenSharingManager) {
+          transceiver.sender.setParameters({
+            ...transceiver.sender.getParameters(),
+            degradationPreference: 'maintain-resolution'
+          });
+        } */
       }
 
       if(entry.direction !== transceiver.direction) {