Add builder setters for ScalableVideoStructure::LayerFrameConfig

Bug: None
Change-Id: I19721f87b9f4641e093dc51f9c023b0493adcf97
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/176702
Reviewed-by: Philip Eliasson <philipel@webrtc.org>
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#31473}

modules/video_coding/codecs/av1/scalable_video_controller.h

@@ -28,23 +28,44 @@ class ScalableVideoController {
     int num_spatial_layers = 1;
     int num_temporal_layers = 1;
   };
-  struct LayerFrameConfig {
+  class LayerFrameConfig {
+   public:
+    // Builders/setters.
+    LayerFrameConfig& Id(int value);
+    LayerFrameConfig& Keyframe();
+    LayerFrameConfig& S(int value);
+    LayerFrameConfig& T(int value);
+    LayerFrameConfig& Reference(int buffer_id);
+    LayerFrameConfig& Update(int buffer_id);
+    LayerFrameConfig& ReferenceAndUpdate(int buffer_id);
+
+    // Getters.
+    int Id() const { return id_; }
+    bool IsKeyframe() const { return is_keyframe_; }
+    int SpatialId() const { return spatial_id_; }
+    int TemporalId() const { return temporal_id_; }
+    const absl::InlinedVector<CodecBufferUsage, kMaxEncoderBuffers>& Buffers()
+        const {
+      return buffers_;
+    }
+
+   private:
     // Id to match configuration returned by NextFrameConfig with
     // (possibly modified) configuration passed back via OnEncoderDone.
     // The meaning of the id is an implementation detail of
     // the ScalableVideoController.
-    int id = 0;
+    int id_ = 0;
 
     // Indication frame should be encoded as a key frame. In particular when
     // `is_keyframe=true` property `CodecBufferUsage::referenced` should be
     // ignored and treated as false.
-    bool is_keyframe = false;
+    bool is_keyframe_ = false;
 
-    int spatial_id = 0;
-    int temporal_id = 0;
+    int spatial_id_ = 0;
+    int temporal_id_ = 0;
     // Describes how encoder which buffers encoder allowed to reference and
     // which buffers encoder should update.
-    absl::InlinedVector<CodecBufferUsage, kMaxEncoderBuffers> buffers;
+    absl::InlinedVector<CodecBufferUsage, kMaxEncoderBuffers> buffers_;
   };
 
   virtual ~ScalableVideoController() = default;
@@ -66,6 +87,43 @@ class ScalableVideoController {
       LayerFrameConfig config) = 0;
 };
 
+// Below are implementation details.
+inline ScalableVideoController::LayerFrameConfig&
+ScalableVideoController::LayerFrameConfig::Id(int value) {
+  id_ = value;
+  return *this;
+}
+inline ScalableVideoController::LayerFrameConfig&
+ScalableVideoController::LayerFrameConfig::Keyframe() {
+  is_keyframe_ = true;
+  return *this;
+}
+inline ScalableVideoController::LayerFrameConfig&
+ScalableVideoController::LayerFrameConfig::S(int value) {
+  spatial_id_ = value;
+  return *this;
+}
+inline ScalableVideoController::LayerFrameConfig&
+ScalableVideoController::LayerFrameConfig::T(int value) {
+  temporal_id_ = value;
+  return *this;
+}
+inline ScalableVideoController::LayerFrameConfig&
+ScalableVideoController::LayerFrameConfig::Reference(int buffer_id) {
+  buffers_.emplace_back(buffer_id, /*referenced=*/true, /*updated=*/false);
+  return *this;
+}
+inline ScalableVideoController::LayerFrameConfig&
+ScalableVideoController::LayerFrameConfig::Update(int buffer_id) {
+  buffers_.emplace_back(buffer_id, /*referenced=*/false, /*updated=*/true);
+  return *this;
+}
+inline ScalableVideoController::LayerFrameConfig&
+ScalableVideoController::LayerFrameConfig::ReferenceAndUpdate(int buffer_id) {
+  buffers_.emplace_back(buffer_id, /*referenced=*/true, /*updated=*/true);
+  return *this;
+}
+
 }  // namespace webrtc
 
 #endif  // MODULES_VIDEO_CODING_CODECS_AV1_SCALABLE_VIDEO_CONTROLLER_H_