第三方对接

Flutter（Dart）                              原生 GL 线程（iOS / Android）
FBEngine.create(externalContext: true)
engine.setSmoothing / setReshape / …  →     第三方前处理回调
await engine.setFilter                      FacebetterPlugin.processTexture(tex, w, h)
engine.dispose()                            写回对方 textureId

import 'package:facebetter_flutter/facebetter_flutter.dart';

FBEngine.setLogConfig(console: true, level: FBLogLevel.info);

final engine = await FBEngine.create(const FBEngineConfig(
  appId: 'your_app_id',
  appKey: 'your_app_key',
  externalContext: true,
  enableLandmarks: false,
));

engine.setSmoothing(0.8);
engine.setWhitening(0.5);
engine.setReshape(FBReshape.faceThin, 0.3);
engine.setLipstick(0.4);
await engine.setFilter(path: '/path/to/filter.fbd');

// 滑条可直接调同步 setter
// onChanged: (v) => engine.setSmoothing(v),

await trtcCloud.enableCustomVideoProcess(true);

#import <facebetter_flutter/FacebetterPlugin.h>

- (uint32_t)onProcessVideoFrame:(TRTCVideoFrame *)srcFrame
                        dstFrame:(TRTCVideoFrame *)dstFrame {
  uint32_t out = [FacebetterPlugin processTexture:srcFrame.textureId
                                            width:srcFrame.width
                                           height:srcFrame.height];
  if (out != 0) {
    dstFrame.textureId = out;
  }
  return 0;
}

import net.pixpark.facebetter.flutter.FacebetterPlugin

override fun onProcessVideoFrame(
    srcFrame: TRTCCloudDef.TRTCVideoFrame,
    dstFrame: TRTCCloudDef.TRTCVideoFrame,
): Int {
    val out = FacebetterPlugin.processTexture(
        srcFrame.texture.textureId,
        srcFrame.width,
        srcFrame.height,
    )
    if (out != 0) {
        dstFrame.texture.textureId = out
    }
    return 0
}

await trtcCloud.enableCustomVideoProcess(false);
engine.dispose();