Stop using setCodecPreferences() as it causes stuttering on Chromium 124+

src/utils/sdp.ts

@@ -1,5 +1,59 @@
+export function setCodecPreferences(sdp: string, preferredCodec: string) {
+    const h264Pattern = /a=fmtp:(\d+).*profile-level-id=([0-9a-f]{6})/g;
+    const profilePrefix = preferredCodec === 'high' ? '4d' : (preferredCodec === 'low' ? '420' : '42e');
+
+    const preferredCodecIds: string[] = [];
+
+    // Find all H.264 codec profile IDs
+    const matches = sdp.matchAll(h264Pattern) || [];
+    for (const match of matches) {
+        const id = match[1];
+        const profileId = match[2];
+
+        if (profileId.startsWith(profilePrefix)) {
+            preferredCodecIds.push(id);
+        }
+    }
+
+    // No preferred IDs found
+    if (!preferredCodecIds.length) {
+        return sdp;
+    }
+
+    const lines = sdp.split('\r\n');
+    for (let lineIndex = 0; lineIndex < lines.length; lineIndex++) {
+        const line = lines[lineIndex];
+        if (!line.startsWith('m=video')) {
+            continue;
+        }
+
+        // https://datatracker.ietf.org/doc/html/rfc4566#section-5.14
+        // m=<media> <port> <proto> <fmt>
+        // m=video 9 UDP/TLS/RTP/SAVPF 127 39 102 104 106 108
+        const tmp = line.trim().split(' ');
+
+        // Get array of <fmt>
+        // ['127', '39', '102', '104', '106', '108']
+        let ids = tmp.slice(3);
+
+        // Remove preferred IDs in the original array
+        ids = ids.filter(item => !preferredCodecIds.includes(item));
+
+        // Put preferred IDs at the beginning
+        ids = preferredCodecIds.concat(ids);
+
+        // Update line's content
+        lines[lineIndex] = tmp.slice(0, 3).concat(ids).join(' ');
+
+        break;
+    }
+
+    return lines.join('\r\n');
+}
+
+
 export function patchSdpBitrate(sdp: string, video?: number, audio?: number) {
-    const lines = sdp.split('\n');
+    const lines = sdp.split('\r\n');
 
     const mediaSet: Set<string> = new Set();
     !!video && mediaSet.add('video');
@@ -57,5 +111,5 @@ export function patchSdpBitrate(sdp: string, video?: number, audio?: number) {
         }
     }
 
-    return lines.join('\n');
+    return lines.join('\r\n');
 }