From 69620a707d6f248ed8647fa20773e0e6de3bbb75 Mon Sep 17 00:00:00 2001
From: nitesh <niteshchaurasiya193@gmail.com>
Date: Sun, 9 Aug 2026 23:51:58 +0530
Subject: [PATCH] add option to add simuclcast layers in trackpublishoptions

---
 livekit-ffi/protocol/room.proto    |  7 +++++++
 livekit-ffi/src/conversion/room.rs | 14 ++++++++++++--
 2 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/livekit-ffi/protocol/room.proto b/livekit-ffi/protocol/room.proto
index 6e5458871..345d318ac 100644
--- a/livekit-ffi/protocol/room.proto
+++ b/livekit-ffi/protocol/room.proto
@@ -305,6 +305,13 @@ message AudioEncoding {
   required uint64 max_bitrate = 1;
 }
 
+// A video preset describing a simulcast layer.
+message VideoPreset {
+  required uint32 width = 1;
+  required uint32 height = 2;
+  required VideoEncoding encoding = 3;
+} 
+
 message TrackPublishOptions {
   // encodings are optional
   optional VideoEncoding video_encoding = 1;
diff --git a/livekit-ffi/src/conversion/room.rs b/livekit-ffi/src/conversion/room.rs
index a5bbb4df4..674cf434c 100644
--- a/livekit-ffi/src/conversion/room.rs
+++ b/livekit-ffi/src/conversion/room.rs
@@ -20,7 +20,7 @@ use livekit::{
     },
     options::{
         AudioEncoding, DegradationPreference, FrameMetadataFeatures, TrackPublishOptions,
-        VideoEncoderBackend, VideoEncoding,
+        VideoEncoderBackend, VideoEncoding, VideoPreset,
     },
     prelude::*,
     webrtc::{
@@ -354,7 +354,11 @@ impl From<proto::TrackPublishOptions> for TrackPublishOptions {
             red: opts.red.unwrap_or(default_publish_options.red),
             simulcast: opts.simulcast.unwrap_or(default_publish_options.simulcast),
             stream: opts.stream.unwrap_or(default_publish_options.stream),
-            simulcast_layers: default_publish_options.simulcast_layers,
+            simulcast_layers: if opts.simulcast_layers.is_empty() {
+                opts.default_publish_options.simulcast_layers
+            } else {
+                Some(opts.simulcast_layers.into_iter().map(Into::into).collect())
+            },
             preconnect_buffer: opts
                 .preconnect_buffer
                 .unwrap_or(default_publish_options.preconnect_buffer),
@@ -381,6 +385,12 @@ impl From<proto::AudioEncoding> for AudioEncoding {
     }
 }
 
+impl From<proto::VideoPreset> for VideoPreset {
+    fn from(preset: proto::VideoPreset) -> Self {
+        Self { width: preset.width, height: preset.height, encoding: preset.encoding.into() }
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use livekit::options::{TrackPublishOptions, VideoEncoderBackend};