fix: fix unable to locate __arm_tpidr2_save for android ffi.

.github/workflows/builds.yml

@@ -105,4 +105,4 @@ jobs:
           ln -sf $ANDROID_NDK_ROOT/toolchains/llvm/prebuilt/linux-x86_64/lib/${{ matrix.ndk_arch }}/{libunwind.so,libc++abi.a} $ANDROID_NDK_ROOT/toolchains/llvm/prebuilt/linux-x86_64/lib/
           cargo install cargo-ndk
           # FIXME: wgpu_room does not link on aarch64
-          cargo ndk --target ${{ matrix.target }} build --release -p livekit --workspace --exclude wgpu_room -vv
+          cargo ndk --target ${{ matrix.target }} build --release -p livekit --workspace -vv

.github/workflows/ffi-builds.yml

@@ -89,23 +89,20 @@ jobs:
             dylib: liblivekit_ffi.so
             jar: libwebrtc.jar
             target: aarch64-linux-android
-            ndk_arch: aarch64-unknown-linux-musl
             name: ffi-android-arm64
             buildargs: --no-default-features --features "rustls-tls-webpki-roots"
           - os: ubuntu-latest
             platform: android
             dylib: liblivekit_ffi.so
             jar: libwebrtc.jar
             target: armv7-linux-androideabi
-            ndk_arch: arm-unknown-linux-musleabihf
             name: ffi-android-armv7
             buildargs: --no-default-features --features "rustls-tls-webpki-roots"
           - os: ubuntu-latest
             platform: android
             dylib: liblivekit_ffi.so
             jar: libwebrtc.jar
             target: x86_64-linux-android
-            ndk_arch: x86_64-unknown-linux-musl
             name: ffi-android-x86_64
             buildargs: --no-default-features --features "rustls-tls-webpki-roots"
 
@@ -171,7 +168,6 @@ jobs:
         if: ${{ matrix.platform == 'android' }}
         run: |
           cd livekit-ffi/
-          ln -sf $ANDROID_NDK_ROOT/toolchains/llvm/prebuilt/linux-x86_64/lib/${{ matrix.ndk_arch }}/{libunwind.so,libc++abi.a} $ANDROID_NDK_ROOT/toolchains/llvm/prebuilt/linux-x86_64/lib/
           cargo install cargo-ndk
           cargo ndk --target ${{ matrix.target }} build --release ${{ matrix.buildargs }}
 

examples/wgpu_room/src/logo_track.rs

@@ -77,8 +77,8 @@ impl LogoTrack {
                 LocalTrack::Video(track.clone()),
                 TrackPublishOptions {
                     source: TrackSource::Camera,
-                    simulcast: false,
-                    video_codec: VideoCodec::H264,
+                    simulcast: true,
+                    video_codec: VideoCodec::H265,
                     ..Default::default()
                 },
             )

livekit-ffi/Cargo.toml

@@ -40,6 +40,7 @@ from_variants = "1.0.2"
 
 [target.'cfg(target_os = "android")'.dependencies]
 jni = "0.21.1"
+link-cplusplus = { version = "1", features = ["nothing"] }
 
 [build-dependencies]
 prost-build = "0.14.1"

webrtc-sys/build.rs

@@ -249,10 +249,11 @@ fn main() {
 
             println!("cargo:rustc-link-lib=EGL");
             println!("cargo:rustc-link-lib=OpenSLES");
+            println!("cargo:rustc-link-lib=c++_static");
+            println!("cargo:rustc-link-lib=c++abi");
 
             configure_android_sysroot(&mut builder);
-
-            builder.file("src/android.cpp").flag("-std=c++20").cpp_link_stdlib("c++_static");
+            builder.file("src/android.cpp").flag("-std=c++20");
         }
         _ => {
             panic!("Unsupported target, {}", target_os);
@@ -340,10 +341,6 @@ fn configure_darwin_sysroot(builder: &mut cc::Build) {
 
 fn configure_android_sysroot(builder: &mut cc::Build) {
     let toolchain = webrtc_sys_build::android_ndk_toolchain().unwrap();
-    let toolchain_lib = toolchain.join("lib");
-
     let sysroot = toolchain.join("sysroot").canonicalize().unwrap();
-    println!("cargo:rustc-link-search={}", toolchain_lib.display());
-
     builder.flag(format!("-isysroot{}", sysroot.display()).as_str());
 }

webrtc-sys/build/src/lib.rs

@@ -27,7 +27,7 @@ use regex::Regex;
 use reqwest::StatusCode;
 
 pub const SCRATH_PATH: &str = "livekit_webrtc";
-pub const WEBRTC_TAG: &str = "webrtc-ebd5a9f";
+pub const WEBRTC_TAG: &str = "webrtc-ebd5a9f-2";
 pub const IGNORE_DEFINES: [&str; 2] = ["CR_CLANG_REVISION", "CR_XCODE_VERSION"];
 
 pub fn target_os() -> String {

webrtc-sys/libwebrtc/build_android.sh

@@ -72,7 +72,10 @@ git apply "$COMMAND_DIR/patches/ssl_verify_callback_with_native_handle.patch" -v
 git apply "$COMMAND_DIR/patches/add_deps.patch" -v --ignore-space-change --ignore-whitespace --whitespace=nowarn
 git apply "$COMMAND_DIR/patches/android_use_libunwind.patch" -v --ignore-space-change --ignore-whitespace --whitespace=nowarn
 
-cd ..
+cd third_party/libyuv
+git apply "$COMMAND_DIR/patches/disable_sme_for_libyuv.patch" -v --ignore-space-change --ignore-whitespace --whitespace=nowarn
+
+cd ../../..
 
 mkdir -p "$ARTIFACTS_DIR/lib"
 
@@ -95,6 +98,7 @@ args="is_debug=$debug \
   is_component_build=false \
   enable_stripping=true \
   rtc_use_h264=false \
+  rtc_use_h265=true \
   rtc_use_pipewire=false \
   symbol_level=0 \
   enable_iterator_debugging=false \

webrtc-sys/libwebrtc/patches/disable_sme_for_libyuv.patch

@@ -0,0 +1,13 @@
+diff --git a/libyuv.gni b/libyuv.gni
+index 3334df70..9859a121 100644
+--- a/libyuv.gni
++++ b/libyuv.gni
+@@ -24,7 +24,7 @@ declare_args() {
+   # errors on Fuchsia, macOS, and compilation errors on Windows.
+   # TODO: bug 359006069 - Remove the restriction after the linker and
+   # compilation errors are fixed.
+-  libyuv_use_sme = current_cpu == "arm64" && (is_linux || is_android)
++  libyuv_use_sme = current_cpu == "arm64" && (is_linux)
+   libyuv_use_msa =
+       (current_cpu == "mips64el" || current_cpu == "mipsel") && mips_use_msa
+   libyuv_use_mmi =

webrtc-sys/src/objc_video_factory.mm

@@ -16,20 +16,23 @@
 
 #include "livekit/objc_video_factory.h"
 
-#import <sdk/objc/components/video_codec/RTCVideoDecoderFactoryH264.h>
-#import <sdk/objc/components/video_codec/RTCVideoEncoderFactoryH264.h>
+#import <sdk/objc/components/video_codec/RTCDefaultVideoDecoderFactory.h>
+#import <sdk/objc/components/video_codec/RTCDefaultVideoEncoderFactory.h>
+#import <sdk/objc/components/video_codec/RTCVideoEncoderFactorySimulcast.h>
 #include "sdk/objc/native/api/video_decoder_factory.h"
 #include "sdk/objc/native/api/video_encoder_factory.h"
 
 namespace livekit {
 
 std::unique_ptr<webrtc::VideoEncoderFactory> CreateObjCVideoEncoderFactory() {
-  // TODO(theomonnom): Simulcast?
-  return webrtc::ObjCToNativeVideoEncoderFactory([[RTCVideoEncoderFactoryH264 alloc] init]);
+  RTCDefaultVideoEncoderFactory* encoderFactory = [[RTCDefaultVideoEncoderFactory alloc] init];
+  RTCVideoEncoderFactorySimulcast* simulcastFactory =
+      [[RTCVideoEncoderFactorySimulcast alloc] initWithPrimary:encoderFactory fallback:encoderFactory];
+  return webrtc::ObjCToNativeVideoEncoderFactory(simulcastFactory);
 }
 
 std::unique_ptr<webrtc::VideoDecoderFactory> CreateObjCVideoDecoderFactory() {
-  return webrtc::ObjCToNativeVideoDecoderFactory([[RTCVideoDecoderFactoryH264 alloc] init]);
+  return webrtc::ObjCToNativeVideoDecoderFactory([[RTCDefaultVideoDecoderFactory alloc] init]);
 }
 
 }  // namespace livekit