fix: 修复自编码模式分辨率切换及画面拉伸问题

- 重启编码器以支持动态分辨率切换
- 同步调整解码端 SurfaceView 尺寸以保持宽高比
- 修复 MediaCodec Image 未及时关闭导致的潜在崩溃

WebRTCController/app/src/main/java/com/ttstd/controller/MainActivity.java

@@ -19,6 +19,7 @@ import android.widget.RadioGroup;
 import android.widget.Switch;
 import android.view.SurfaceView;
 import android.view.SurfaceHolder;
+import android.view.Gravity;
 import com.ttstd.controller.webrtc.SelfCodecDecoder;
 import androidx.appcompat.app.AlertDialog;
 
@@ -231,6 +232,57 @@ public class MainActivity extends AppCompatActivity {
         });
     }
 
+    /**
+     * 自编码模式：按比例调整 selfCodecSurface 与触摸层尺寸。
+     * MediaCodec 渲染到 SurfaceView 时会把帧拉伸填满整个 Surface 显示区域，
+     * 因此必须让 Surface 的宽高比与视频一致，否则画面会被拉伸变形。
+     */
+    private void adjustSelfCodecSize(int videoWidth, int videoHeight) {
+        runOnUiThread(() -> {
+            if (videoWidth == 0 || videoHeight == 0) return;
+
+            int containerWidth = controlPanel.getWidth();
+            int containerHeight = controlPanel.getHeight();
+
+            if (containerWidth == 0 || containerHeight == 0) {
+                // 容器尚未测量完成，稍后重试
+                controlPanel.postDelayed(() -> adjustSelfCodecSize(videoWidth, videoHeight), 100);
+                return;
+            }
+
+            float videoAspectRatio = (float) videoWidth / videoHeight;
+            float containerAspectRatio = (float) containerWidth / containerHeight;
+
+            int newWidth, newHeight;
+            if (videoAspectRatio > containerAspectRatio) {
+                // 视频更宽，以容器宽度为准
+                newWidth = containerWidth;
+                newHeight = (int) (containerWidth / videoAspectRatio);
+            } else {
+                // 视频更高，以容器高度为准
+                newWidth = (int) (containerHeight * videoAspectRatio);
+                newHeight = containerHeight;
+            }
+
+            // 调整自编码渲染 Surface 的尺寸（等比居中），避免画面被拉伸变形
+            FrameLayout.LayoutParams lp = (FrameLayout.LayoutParams) selfCodecSurface.getLayoutParams();
+            lp.width = newWidth;
+            lp.height = newHeight;
+            lp.gravity = Gravity.CENTER;
+            selfCodecSurface.setLayoutParams(lp);
+
+            // 同步触摸层，使其与视频区域完全重合，保证触控坐标一致
+            FrameLayout.LayoutParams overlayLp = (FrameLayout.LayoutParams) touchOverlay.getLayoutParams();
+            overlayLp.width = newWidth;
+            overlayLp.height = newHeight;
+            overlayLp.gravity = Gravity.CENTER;
+            touchOverlay.setLayoutParams(overlayLp);
+
+            Log.d(TAG, String.format("Adjusted self-codec view size: %dx%d (video: %dx%d, container: %dx%d)",
+                    newWidth, newHeight, videoWidth, videoHeight, containerWidth, containerHeight));
+        });
+    }
+
     /** 弹出鉴权输入对话框：选择免密连接、动态验证码或固定密码，输入后发起连接。 */
     private void showAuthDialog() {
         String serverUrl = etServerUrl.getText().toString().trim();
@@ -653,6 +705,7 @@ public class MainActivity extends AppCompatActivity {
         tvStreamMode = findViewById(R.id.tv_stream_mode);
         selfCodecSurface = findViewById(R.id.self_codec_surface);
         selfCodecDecoder = new SelfCodecDecoder();
+        selfCodecDecoder.setOnResolutionUpdateListener((w, h) -> adjustSelfCodecSize(w, h));
         surfaceCallback = new SurfaceHolder.Callback() {
             @Override
             public void surfaceCreated(SurfaceHolder holder) {
@@ -688,6 +741,9 @@ public class MainActivity extends AppCompatActivity {
             selfCodecSurface.setVisibility(View.VISIBLE);
             remoteVideoView.setVisibility(View.GONE);
             selfCodecDecoder.setEnabled(true);
+            if (selfCodecDecoder.getVideoWidth() > 0) {
+                adjustSelfCodecSize(selfCodecDecoder.getVideoWidth(), selfCodecDecoder.getVideoHeight());
+            }
         } else {
             selfCodecSurface.setVisibility(View.GONE);
             remoteVideoView.setVisibility(View.VISIBLE);
@@ -706,6 +762,9 @@ public class MainActivity extends AppCompatActivity {
             selfCodecSurface.setVisibility(View.VISIBLE);
             remoteVideoView.setVisibility(View.GONE);
             selfCodecDecoder.setEnabled(true);
+            if (selfCodecDecoder.getVideoWidth() > 0) {
+                adjustSelfCodecSize(selfCodecDecoder.getVideoWidth(), selfCodecDecoder.getVideoHeight());
+            }
         } else {
             selfCodecSurface.setVisibility(View.GONE);
             remoteVideoView.setVisibility(View.VISIBLE);

WebRTCController/app/src/main/java/com/ttstd/controller/webrtc/SelfCodecDecoder.java

@@ -38,6 +38,9 @@ public class SelfCodecDecoder {
     private int videoWidth = PLACEHOLDER_W;
     private int videoHeight = PLACEHOLDER_H;
 
+    // 分辨率变化回调（通知 UI 调整渲染 Surface 尺寸以保持宽高比，避免画面被拉伸变形）
+    private OnResolutionUpdateListener resolutionListener;
+
     // 待喂入的参数集（SPS/PPS 等），以 CODEC_CONFIG 形式输入解码器
     private final ArrayDeque<byte[]> pendingConfigs = new ArrayDeque<>();
     // 待解码帧
@@ -86,6 +89,9 @@ public class SelfCodecDecoder {
                 // 分辨率变化时需重置解码器以重新 configure
                 releaseDecoder();
             }
+            if (resolutionListener != null) {
+                resolutionListener.onResolutionUpdated(w, h);
+            }
         }
     }
 
@@ -333,4 +339,21 @@ public class SelfCodecDecoder {
         releaseDecoder();
         surface = null;
     }
+
+    public int getVideoWidth() {
+        return videoWidth;
+    }
+
+    public int getVideoHeight() {
+        return videoHeight;
+    }
+
+    public void setOnResolutionUpdateListener(OnResolutionUpdateListener l) {
+        this.resolutionListener = l;
+    }
+
+    /** 分辨率变化监听：当被控端上报新的视频宽高时回调，供 UI 调整渲染视图比例。 */
+    public interface OnResolutionUpdateListener {
+        void onResolutionUpdated(int width, int height);
+    }
 }