fix(native): report the active codec

native/sender/internal/app/ui/app.js

@@ -193,6 +193,7 @@ async function connectMediaSocket(generation, codec, audio) {
 }
 
 async function startEncoder(generation, codec) {
+  metrics.codec = codec;
   const preferred = {
     codec: codec === "h264" ? "avc1.42c01f" : "vp8",
     width: WIDTH,
@@ -218,7 +219,9 @@ async function startEncoder(generation, codec) {
     metrics.hardwarePreference = HARDWARE_STATUS.PREFERENCE_ACCEPTED;
   }
   metrics.hardwareEvidence = HARDWARE_STATUS.UNVERIFIED;
-  if (!support.supported) throw new Error("此设备不支持 VP8 720p30 编码");
+  if (!support.supported) {
+    throw new Error(`此设备不支持 ${codecLabel(codec)} 720p30 编码`);
+  }
   let activeEncoder;
   activeEncoder = new VideoEncoder({
     output: (chunk) => sendEncodedChunk(generation, activeEncoder, chunk),
@@ -592,7 +595,7 @@ function updateDiagnostics() {
   const height = captureSettings?.height ?? "未知";
   const rate = captureSettings?.frameRate ?? "未知";
   elements.captureDiagnostic.textContent = `${width} × ${height} · ${rate} FPS`;
-  elements.encoderDiagnostic.textContent = `VP8 · 3 Mbps 上限 · 单对象 · 硬件偏好 ${hardwarePreferenceLabel(metrics.hardwarePreference)} · 硬件证据 ${hardwareEvidenceLabel(metrics.hardwareEvidence)}`;
+  elements.encoderDiagnostic.textContent = `${codecLabel(metrics.codec)} · 3 Mbps 上限 · 单对象 · 硬件偏好 ${hardwarePreferenceLabel(metrics.hardwarePreference)} · 硬件证据 ${hardwareEvidenceLabel(metrics.hardwareEvidence)}`;
   elements.bridgeDiagnostic.textContent = `读取 ${metrics.framesRead} · 提交 ${metrics.framesSubmitted} · 输出 ${metrics.encoderOutputs} · 编码队列丢弃 ${metrics.encoderQueueDrops} · 编码队列峰值 ${metrics.encoderQueuePeak} 帧 · socket 峰值 ${metrics.socketBufferedPeak} B`;
   const helper = nativeDiagnostics?.media;
   const queue = helper?.queue;
@@ -647,6 +650,7 @@ function selectedCodec() {
 
 function emptyMetrics() {
   return {
+    codec: "vp8",
     framesRead: 0,
     framesSubmitted: 0,
     encoderOutputs: 0,
@@ -659,6 +663,10 @@ function emptyMetrics() {
   };
 }
 
+function codecLabel(codec) {
+  return codec === "h264" ? "H.264" : "VP8";
+}
+
 function hardwarePreferenceLabel(value) {
   return {
     [HARDWARE_STATUS.UNREQUESTED]: "未请求",

tests/native-hardware-status.test.ts

@@ -38,6 +38,11 @@ describe("native sender hardware preference contract", () => {
     expect(senderHTML).toContain('<option value="vp8">VP8 (default)</option>');
     expect(senderUI).toContain('elements.codec?.value === "h264" ? "h264" : "vp8"');
     expect(senderUI).toContain('codec: codec === "h264" ? "avc1.42c01f" : "vp8"');
+    expect(senderUI).toContain("metrics.codec = codec");
+    expect(senderUI).toContain("codecLabel(metrics.codec)");
+    expect(senderUI).toContain("codecLabel(codec)");
+    expect(senderUI).not.toContain("此设备不支持 VP8 720p30 编码");
+    expect(senderUI).not.toContain("`VP8 · 3 Mbps 上限");
     expect(senderUI).toContain("encoderInstances: 1");
     expect(senderUI).toContain("HARDWARE_STATUS.PREFERENCE_ACCEPTED");
     expect(senderUI).toContain("HARDWARE_STATUS.FALLBACK");