From 08d7ace25d6262ac28eff0eaffc065d7ba1f4b86 Mon Sep 17 00:00:00 2001
From: Edison Jwa <me@edison.network>
Date: Wed, 10 Jun 2026 09:18:32 +0900
Subject: [PATCH] fix(audio,flutter): restore VAD on iOS and fix Android build
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

- Add iOS to voiceActivityTransmitAvailable — iOS has CoreML Silero
  VAD pipeline (AppleCoreMlVadWorker) but was excluded by DEC-030
  gating that predated the CoreML integration
- Inline deleted VadWorkerPolicy in android_voice_unit.rs — PR #37
  removed the enum from vad/mod.rs but missed updating Android
---
 .../lib/widgets/voice_settings_controls.dart  |  9 ++-
 .../chanora_audio/src/android_voice_unit.rs   | 55 +++++++------------
 2 files changed, 24 insertions(+), 40 deletions(-)

diff --git a/apps/chanora_flutter/lib/widgets/voice_settings_controls.dart b/apps/chanora_flutter/lib/widgets/voice_settings_controls.dart
index 3eee65c..f52ffea 100644
--- a/apps/chanora_flutter/lib/widgets/voice_settings_controls.dart
+++ b/apps/chanora_flutter/lib/widgets/voice_settings_controls.dart
@@ -65,13 +65,12 @@ List<ButtonSegment<rust.BridgeTransmitMode>> transmitModeSegmentsFor({
 /// True when this host advertises VAD transmit per DEC-030.
 ///
 /// The desktop Silero ONNX + WebRTC fallback ships on Windows and
-/// Linux; the Android Oboe + WebRTC path covers Android.  iOS and
-/// macOS still rely on the Apple VoiceProcessingIO unit and have no
-/// Chanora-owned VAD pipeline, so the bridge cannot honour the
-/// voice-activity transmit mode there.
+/// Linux; the Android Oboe + WebRTC path covers Android; iOS uses the
+/// Apple CoreML Silero VAD pipeline via `vad::apple_coreml`. macOS is
+/// still gated until its VAD pipeline is confirmed.
 bool get voiceActivityTransmitAvailable {
   if (kIsWeb) return false;
-  return Platform.isWindows || Platform.isLinux || Platform.isAndroid;
+  return Platform.isWindows || Platform.isLinux || Platform.isAndroid || Platform.isIOS;
 }
 
 /// Android hardware/WebRTC selector segments.
diff --git a/crates/chanora_audio/src/android_voice_unit.rs b/crates/chanora_audio/src/android_voice_unit.rs
index 69290d0..75ed66f 100644
--- a/crates/chanora_audio/src/android_voice_unit.rs
+++ b/crates/chanora_audio/src/android_voice_unit.rs
@@ -375,38 +375,20 @@ impl AndroidCaptureState {
                     speech: true,
                 }
             } else if vad_backend == crate::VadBackend::SileroOnnx {
-                match crate::vad::callback_vad_worker_policy(
-                    voice_activity_mode,
-                    vad_backend,
-                    self.silero_vad_worker.is_some(),
-                ) {
-                    crate::vad::VadWorkerPolicy::UseWorker => {
-                        let worker = self
-                            .silero_vad_worker
-                            .as_ref()
-                            .expect("policy checked worker");
-                        let enqueued = worker.try_send(capture_seq, &frame);
-                        if !worker.is_stale(capture_seq) {
-                            let p = worker.latest_probability();
-                            crate::vad::VadOutput {
-                                probability: p,
-                                speech: p >= 0.5,
-                            }
-                        } else if enqueued {
-                            crate::vad::VadOutput {
-                                probability: 0.0,
-                                speech: false,
-                            }
-                        } else {
-                            used_fallback_vad = true;
-                            self.mark_vad_fallback_active(vad_backend);
-                            crate::vad::VoiceActivityDetector::process_10ms(
-                                &mut self.vad_detector,
-                                &frame,
-                            )
+                if let Some(worker) = self.silero_vad_worker.as_ref() {
+                    let enqueued = worker.try_send(capture_seq, &frame);
+                    if !worker.is_stale(capture_seq) {
+                        let p = worker.latest_probability();
+                        crate::vad::VadOutput {
+                            probability: p,
+                            speech: p >= 0.5,
                         }
-                    }
-                    crate::vad::VadWorkerPolicy::UseFallback => {
+                    } else if enqueued {
+                        crate::vad::VadOutput {
+                            probability: 0.0,
+                            speech: false,
+                        }
+                    } else {
                         used_fallback_vad = true;
                         self.mark_vad_fallback_active(vad_backend);
                         crate::vad::VoiceActivityDetector::process_10ms(
@@ -414,10 +396,13 @@ impl AndroidCaptureState {
                             &frame,
                         )
                     }
-                    crate::vad::VadWorkerPolicy::NotModelBacked => crate::vad::VadOutput {
-                        probability: 1.0,
-                        speech: true,
-                    },
+                } else {
+                    used_fallback_vad = true;
+                    self.mark_vad_fallback_active(vad_backend);
+                    crate::vad::VoiceActivityDetector::process_10ms(
+                        &mut self.vad_detector,
+                        &frame,
+                    )
                 }
             } else {
                 crate::vad::VoiceActivityDetector::process_10ms(&mut self.vad_detector, &frame)