Add config option for skipping late video frames

pkg/config/config.yaml

@@ -140,6 +140,9 @@ emulator:
   # checks if the system supports running an emulator at startup
   failFast: true
 
+  # do not send late video frames
+  skipLateFrames: false
+
   libretro:
     # use zip compression for emulator save states
     saveCompression: true

pkg/config/emulator.go

@@ -9,12 +9,13 @@ import (
 )
 
 type Emulator struct {
-	FailFast    bool
-	Threads     int
-	Storage     string
-	LocalPath   string
-	Libretro    LibretroConfig
-	AutosaveSec int
+	FailFast       bool
+	Threads        int
+	Storage        string
+	LocalPath      string
+	Libretro       LibretroConfig
+	AutosaveSec    int
+	SkipLateFrames bool
 }
 
 type LibretroConfig struct {

pkg/worker/caged/libretro/frontend.go

@@ -204,7 +204,7 @@ func (f *Frontend) handleAudio(audio unsafe.Pointer, samples int) {
 }
 
 func (f *Frontend) handleVideo(data []byte, delta int32, fi nanoarch.FrameInfo) {
-	if f.skipVideo {
+	if f.conf.SkipLateFrames && f.skipVideo {
 		return
 	}