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+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+Everyone is permitted to copy and distribute verbatim copies
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+
+                            Preamble
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+SUCH DAMAGES.
+
+17. Interpretation of Sections 15 and 16.
+
+If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS

README.md

@@ -0,0 +1,27 @@
+# go-mix Audio Mixer
+
+Go-mix is a digital audio mixing software designed to work with either the JACK audio server or PipeWire (using `pipewire-jack`). go-mix is able to route and mix audio data from multiple input channels to multiple output channels with a configurable volume for each the input channel, the route and the output channel.
+
+# 📦 Building
+
+To build the go-mix binary, first make sure you have Go and the JACK development headers installed on your system.
+
+Then build the software with the following command:
+
+```bash
+$ go build
+```
+
+This should create an executable named `go-mix`.
+
+# 🛠️ Usage
+
+Start go-mix by executing the binary:
+
+```bash
+$ ./go-mix
+```
+
+Go-mix should then automatically create a new directory called `data` containing the configuration files in the current directory.
+
+You can access the go-mix API on port 8080 by default. You could interface with the API directly or use a go-mix client like [`gomix_flutter`](https://gitlab.minie4.de/minie4/gomix_flutter). The listen port and other options can be changed in the `config.toml` file in the `data` directory.

api.go

@@ -3,6 +3,7 @@ package main
 import (
 	"encoding/json"
 	"fmt"
+	"sync"
 
 	"github.com/gin-gonic/gin"
 	"github.com/google/uuid"
@@ -13,8 +14,10 @@ var upgrader = websocket.Upgrader{}
 
 type WsClient struct {
 	SendUpdates bool
+	WriteMutex  *sync.Mutex
 }
 
+var wsClientsMutex = new(sync.Mutex)
 var wsClients = make(map[*websocket.Conn]WsClient)
 
 func initApi() {
@@ -120,7 +123,7 @@ func createPort(body CreatePortRequest) (gin.H, gin.H) {
 		registerPort(&newPort, "output")
 		portConfig.Output = append(portConfig.Output, newPort)
 	}
-	saveConfig("ports", &portConfig)
+	markConfig("ports")
 	onPortListChange()
 	return gin.H{"success": true, "UUID": id}, nil
 }
@@ -152,7 +155,7 @@ func deletePort(id string) gin.H {
 	// Unregister port
 	unregisterPort(port)
 
-	saveConfig("ports", &portConfig)
+	markConfig("ports")
 	onPortListChange()
 	return nil
 }
@@ -203,18 +206,25 @@ func setState(id string, body SetPortRequest) (gin.H, gin.H) {
 		return nil, gin.H{"success": false, "error": "Port with provided UUID does not exist!"}
 	}
 
-	if body.Mute != nil {
+	didChange := false
+
+	if body.Mute != nil && port.State.Mute != *body.Mute {
 		port.State.Mute = *body.Mute
+		didChange = true
 	}
-	if body.Volume != nil {
+	if body.Volume != nil && port.State.Volume != *body.Volume {
 		port.State.Volume = *body.Volume
+		didChange = true
 	}
-	if body.Balance != nil {
+	if body.Balance != nil && port.State.Balance != *body.Balance {
 		port.State.Balance = *body.Balance
+		didChange = true
 	}
 
-	saveConfig("ports", &portConfig)
+	if didChange {
+		markConfig("ports")
 	onPortChange(port)
+	}
 	return gin.H{"success": true, "state": port.State}, nil
 }
 
@@ -250,7 +260,7 @@ func editPort(id string, body EditPortRequest) (gin.H, gin.H) {
 		port.Name = *body.Name
 	}
 
-	saveConfig("ports", &portConfig)
+	markConfig("ports")
 	onPortChange(port)
 	return gin.H{"success": true, "port": port}, nil
 }
@@ -288,7 +298,7 @@ func createRoute(id string, body CreateRouteRequest) gin.H {
 	}
 
 	from.Route = append(from.Route, PortRoute{ToUUID: body.To, Mute: true, Volume: 0, Balance: 0})
-	saveConfig("ports", &portConfig)
+	markConfig("ports")
 	onPortChange(from)
 	return nil
 }
@@ -328,18 +338,25 @@ func setRoute(fromId string, toId string, body SetRouteRequest) (gin.H, gin.H) {
 			continue
 		}
 
-		if body.Mute != nil {
+		didChange := false
+
+		if body.Mute != nil && from.Route[i].Mute != *body.Mute {
 			from.Route[i].Mute = *body.Mute
+			didChange = true
 		}
-		if body.Volume != nil {
+		if body.Volume != nil && from.Route[i].Volume != *body.Volume {
 			from.Route[i].Volume = *body.Volume
+			didChange = true
 		}
-		if body.Balance != nil {
+		if body.Balance != nil && from.Route[i].Balance != *body.Balance {
 			from.Route[i].Balance = *body.Balance
+			didChange = true
 		}
 
-		saveConfig("ports", &portConfig)
+		if didChange {
+			markConfig("ports")
 		onPortChange(from)
+		}
 		return gin.H{"success": true, "state": from.Route[i]}, nil
 	}
 
@@ -369,7 +386,7 @@ func deleteRoute(fromId string, toId string) gin.H {
 		}
 
 		from.Route = append(from.Route[:i], from.Route[i+1:]...)
-		saveConfig("ports", &portConfig)
+		markConfig("ports")
 		onPortListChange()
 		return nil
 	}
@@ -383,6 +400,7 @@ type WebsocketMessage struct {
 	UUID           string             `json:"UUID"`
 	ToUUID         string             `json:"toUUID"`
 	PortData       CreatePortRequest  `json:"portData"`
+	PortProperties EditPortRequest    `json:"portProperties"`
 	StateData      SetPortRequest     `json:"stateData"`
 	RouteData      CreateRouteRequest `json:"routeData"`
 	RouteStateData SetRouteRequest    `json:"routeStateData"`
@@ -403,7 +421,9 @@ func wsSendRes(conn *websocket.Conn, res gin.H, err gin.H, request *WebsocketMes
 			RequestMethod: request.Method,
 			ResponseData:  err,
 		})
+		wsClients[conn].WriteMutex.Lock()
 		conn.WriteMessage(1, data)
+		wsClients[conn].WriteMutex.Unlock()
 		return
 	}
 
@@ -418,7 +438,9 @@ func wsSendRes(conn *websocket.Conn, res gin.H, err gin.H, request *WebsocketMes
 	}
 
 	data, _ := json.Marshal(response)
+	wsClients[conn].WriteMutex.Lock()
 	conn.WriteMessage(1, data)
+	wsClients[conn].WriteMutex.Unlock()
 }
 
 func handleWs(c *gin.Context) {
@@ -428,13 +450,17 @@ func handleWs(c *gin.Context) {
 		c.JSON(500, gin.H{"success": false, "error": "Handling websocket connection failed!"})
 	}
 
-	wsClients[conn] = WsClient{SendUpdates: false}
+	wsClientsMutex.Lock()
+	wsClients[conn] = WsClient{SendUpdates: false, WriteMutex: new(sync.Mutex)}
+	wsClientsMutex.Unlock()
 
 	for {
 		var content WebsocketMessage
 		jsonErr := conn.ReadJSON(&content)
 		if jsonErr != nil {
+			wsClientsMutex.Lock()
 			delete(wsClients, conn)
+			wsClientsMutex.Unlock()
 			conn.Close()
 			break
 		}
@@ -446,6 +472,8 @@ func handleWs(c *gin.Context) {
 			res, err = createPort(content.PortData)
 		case "setPortState":
 			res, err = setState(content.UUID, content.StateData)
+		case "editPort":
+			res, err = editPort(content.UUID, content.PortProperties)
 		case "deletePort":
 			err = deletePort(content.UUID)
 		case "createRoute":
@@ -455,10 +483,12 @@ func handleWs(c *gin.Context) {
 		case "deleteRoute":
 			err = deleteRoute(content.UUID, content.ToUUID)
 		case "enableUpdates":
+			wsClientsMutex.Lock()
 			if clientOpts, ok := wsClients[conn]; ok {
 				clientOpts.SendUpdates = true
 				wsClients[conn] = clientOpts
 			}
+			wsClientsMutex.Unlock()
 		default:
 			err = gin.H{"success": false, "error": "Method is not implemented"}
 		}
@@ -467,16 +497,21 @@ func handleWs(c *gin.Context) {
 }
 
 func onPortChange(port *Port) {
+	wsClientsMutex.Lock()
 	for conn := range wsClients {
 		if !wsClients[conn].SendUpdates {
 			continue
 		}
 		jsonData, _ := json.Marshal(WebsocketResponse{Type: "portChange", ResponseData: port})
+		wsClients[conn].WriteMutex.Lock()
 		conn.WriteMessage(1, jsonData)
+		wsClients[conn].WriteMutex.Unlock()
 	}
+	wsClientsMutex.Unlock()
 }
 
 func onPortListChange() {
+	wsClientsMutex.Lock()
 	for conn := range wsClients {
 		if !wsClients[conn].SendUpdates {
 			continue
@@ -485,6 +520,9 @@ func onPortListChange() {
 			Type:         "portListChange",
 			ResponseData: gin.H{"inputs": portConfig.Input, "outputs": portConfig.Output},
 		})
+		wsClients[conn].WriteMutex.Lock()
 		conn.WriteMessage(1, jsonData)
+		wsClients[conn].WriteMutex.Unlock()
 	}
+	wsClientsMutex.Unlock()
 }

config.go

@@ -5,6 +5,7 @@ import (
 	"errors"
 	"fmt"
 	"os"
+	"sync"
 
 	"github.com/pelletier/go-toml/v2"
 )
@@ -27,11 +28,19 @@ type Config struct {
 
 var config Config
 
+var shouldSaveConfigsMutex = new(sync.Mutex)
+var shouldSaveConfigs = map[string]bool{
+	"ports": false,
+}
+
 // Copy default config if `{name}.toml` file does not exist
 func createDefaultConfig(name string) {
 	dest_path := fmt.Sprintf("%s/%s.toml", CONFIG_DIR, name)
 	source_path := fmt.Sprintf("sample_configs/%s.toml", name)
 
+	if _, err := os.Stat(CONFIG_DIR); errors.Is(err, os.ErrNotExist) {
+		os.MkdirAll(CONFIG_DIR, 0744)
+	}
 	if _, err := os.Stat(dest_path); errors.Is(err, os.ErrNotExist) {
 		content, err := sampleConfig.ReadFile(source_path)
 		if err != nil {
@@ -59,6 +68,13 @@ func loadConfig(name string, dest interface{}) {
 	}
 }
 
+// Mark a config file as changed, so it gets saved to disk later
+func markConfig(name string) {
+	shouldSaveConfigsMutex.Lock()
+	shouldSaveConfigs[name] = true
+	shouldSaveConfigsMutex.Unlock()
+}
+
 // Save struct as a `.toml` file
 func saveConfig(name string, dest interface{}) {
 	bin, err := toml.Marshal(dest)
@@ -70,3 +86,12 @@ func saveConfig(name string, dest interface{}) {
 		fmt.Println(err)
 	}
 }
+
+func saveConfigIfMarked(name string, dest interface{}) {
+	shouldSaveConfigsMutex.Lock()
+	if shouldSaveConfigs[name] {
+		shouldSaveConfigs[name] = false
+		saveConfig(name, dest)
+	}
+	shouldSaveConfigsMutex.Unlock()
+}

go.mod

@@ -1,37 +1,43 @@
 module minie4.de/go-mix
 
-go 1.21
+go 1.21.0
+
+toolchain go1.22.5
 
 require (
-	github.com/gin-gonic/gin v1.9.1
+	github.com/gin-gonic/gin v1.10.0
 	github.com/google/uuid v1.6.0
-	github.com/gorilla/websocket v1.5.1
-	github.com/pelletier/go-toml/v2 v2.1.1
+	github.com/gorilla/websocket v1.5.3
+	github.com/pelletier/go-toml/v2 v2.2.3
 	github.com/xthexder/go-jack v0.0.0-20220805234212-bc8604043aba
 )
 
 require (
-	github.com/bytedance/sonic v1.9.1 // indirect
-	github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311 // indirect
-	github.com/gabriel-vasile/mimetype v1.4.2 // indirect
+	github.com/bytedance/sonic v1.12.2 // indirect
+	github.com/bytedance/sonic/loader v0.2.0 // indirect
+	github.com/chenzhuoyu/base64x v0.0.0-20230717121745-296ad89f973d // indirect
+	github.com/cloudwego/base64x v0.1.4 // indirect
+	github.com/cloudwego/iasm v0.2.0 // indirect
+	github.com/gabriel-vasile/mimetype v1.4.5 // indirect
 	github.com/gin-contrib/sse v0.1.0 // indirect
 	github.com/go-playground/locales v0.14.1 // indirect
 	github.com/go-playground/universal-translator v0.18.1 // indirect
-	github.com/go-playground/validator/v10 v10.14.0 // indirect
-	github.com/goccy/go-json v0.10.2 // indirect
+	github.com/go-playground/validator/v10 v10.22.0 // indirect
+	github.com/goccy/go-json v0.10.3 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
-	github.com/klauspost/cpuid/v2 v2.2.4 // indirect
-	github.com/leodido/go-urn v1.2.4 // indirect
-	github.com/mattn/go-isatty v0.0.19 // indirect
+	github.com/klauspost/cpuid/v2 v2.2.8 // indirect
+	github.com/knz/go-libedit v1.10.1 // indirect
+	github.com/leodido/go-urn v1.4.0 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect
 	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
-	github.com/ugorji/go/codec v1.2.11 // indirect
-	golang.org/x/arch v0.3.0 // indirect
-	golang.org/x/crypto v0.14.0 // indirect
-	golang.org/x/net v0.17.0 // indirect
-	golang.org/x/sys v0.13.0 // indirect
-	golang.org/x/text v0.13.0 // indirect
-	google.golang.org/protobuf v1.30.0 // indirect
+	github.com/ugorji/go/codec v1.2.12 // indirect
+	golang.org/x/arch v0.9.0 // indirect
+	golang.org/x/crypto v0.26.0 // indirect
+	golang.org/x/net v0.28.0 // indirect
+	golang.org/x/sys v0.24.0 // indirect
+	golang.org/x/text v0.17.0 // indirect
+	google.golang.org/protobuf v1.34.2 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -1,18 +1,35 @@
 github.com/bytedance/sonic v1.5.0/go.mod h1:ED5hyg4y6t3/9Ku1R6dU/4KyJ48DZ4jPhfY1O2AihPM=
 github.com/bytedance/sonic v1.9.1 h1:6iJ6NqdoxCDr6mbY8h18oSO+cShGSMRGCEo7F2h0x8s=
 github.com/bytedance/sonic v1.9.1/go.mod h1:i736AoUSYt75HyZLoJW9ERYxcy6eaN6h4BZXU064P/U=
+github.com/bytedance/sonic v1.10.0-rc/go.mod h1:ElCzW+ufi8qKqNW0FY314xriJhyJhuoJ3gFZdAHF7NM=
+github.com/bytedance/sonic v1.12.2 h1:oaMFuRTpMHYLpCntGca65YWt5ny+wAceDERTkT2L9lg=
+github.com/bytedance/sonic v1.12.2/go.mod h1:B8Gt/XvtZ3Fqj+iSKMypzymZxw/FVwgIGKzMzT9r/rk=
+github.com/bytedance/sonic/loader v0.1.1/go.mod h1:ncP89zfokxS5LZrJxl5z0UJcsk4M4yY2JpfqGeCtNLU=
+github.com/bytedance/sonic/loader v0.2.0 h1:zNprn+lsIP06C/IqCHs3gPQIvnvpKbbxyXQP1iU4kWM=
+github.com/bytedance/sonic/loader v0.2.0/go.mod h1:ncP89zfokxS5LZrJxl5z0UJcsk4M4yY2JpfqGeCtNLU=
 github.com/chenzhuoyu/base64x v0.0.0-20211019084208-fb5309c8db06/go.mod h1:DH46F32mSOjUmXrMHnKwZdA8wcEefY7UVqBKYGjpdQY=
 github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311 h1:qSGYFH7+jGhDF8vLC+iwCD4WpbV1EBDSzWkJODFLams=
 github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311/go.mod h1:b583jCggY9gE99b6G5LEC39OIiVsWj+R97kbl5odCEk=
+github.com/chenzhuoyu/base64x v0.0.0-20230717121745-296ad89f973d h1:77cEq6EriyTZ0g/qfRdp61a3Uu/AWrgIq2s0ClJV1g0=
+github.com/chenzhuoyu/base64x v0.0.0-20230717121745-296ad89f973d/go.mod h1:8EPpVsBuRksnlj1mLy4AWzRNQYxauNi62uWcE3to6eA=
+github.com/chenzhuoyu/iasm v0.9.0/go.mod h1:Xjy2NpN3h7aUqeqM+woSuuvxmIe6+DDsiNLIrkAmYog=
+github.com/cloudwego/base64x v0.1.4 h1:jwCgWpFanWmN8xoIUHa2rtzmkd5J2plF/dnLS6Xd/0Y=
+github.com/cloudwego/base64x v0.1.4/go.mod h1:0zlkT4Wn5C6NdauXdJRhSKRlJvmclQ1hhJgA0rcu/8w=
+github.com/cloudwego/iasm v0.2.0 h1:1KNIy1I1H9hNNFEEH3DVnI4UujN+1zjpuk6gwHLTssg=
+github.com/cloudwego/iasm v0.2.0/go.mod h1:8rXZaNYT2n95jn+zTI1sDr+IgcD2GVs0nlbbQPiEFhY=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/gabriel-vasile/mimetype v1.4.2 h1:w5qFW6JKBz9Y393Y4q372O9A7cUSequkh1Q7OhCmWKU=
 github.com/gabriel-vasile/mimetype v1.4.2/go.mod h1:zApsH/mKG4w07erKIaJPFiX0Tsq9BFQgN3qGY5GnNgA=
+github.com/gabriel-vasile/mimetype v1.4.5 h1:J7wGKdGu33ocBOhGy0z653k/lFKLFDPJMG8Gql0kxn4=
+github.com/gabriel-vasile/mimetype v1.4.5/go.mod h1:ibHel+/kbxn9x2407k1izTA1S81ku1z/DlgOW2QE0M4=
 github.com/gin-contrib/sse v0.1.0 h1:Y/yl/+YNO8GZSjAhjMsSuLt29uWRFHdHYUb5lYOV9qE=
 github.com/gin-contrib/sse v0.1.0/go.mod h1:RHrZQHXnP2xjPF+u1gW/2HnVO7nvIa9PG3Gm+fLHvGI=
 github.com/gin-gonic/gin v1.9.1 h1:4idEAncQnU5cB7BeOkPtxjfCSye0AAm1R0RVIqJ+Jmg=
 github.com/gin-gonic/gin v1.9.1/go.mod h1:hPrL7YrpYKXt5YId3A/Tnip5kqbEAP+KLuI3SUcPTeU=
+github.com/gin-gonic/gin v1.10.0 h1:nTuyha1TYqgedzytsKYqna+DfLos46nTv2ygFy86HFU=
+github.com/gin-gonic/gin v1.10.0/go.mod h1:4PMNQiOhvDRa013RKVbsiNwoyezlm2rm0uX/T7kzp5Y=
 github.com/go-playground/assert/v2 v2.2.0 h1:JvknZsQTYeFEAhQwI4qEt9cyV5ONwRHC+lYKSsYSR8s=
 github.com/go-playground/assert/v2 v2.2.0/go.mod h1:VDjEfimB/XKnb+ZQfWdccd7VUvScMdVu0Titje2rxJ4=
 github.com/go-playground/locales v0.14.1 h1:EWaQ/wswjilfKLTECiXz7Rh+3BjFhfDFKv/oXslEjJA=
@@ -21,8 +38,12 @@ github.com/go-playground/universal-translator v0.18.1 h1:Bcnm0ZwsGyWbCzImXv+pAJn
 github.com/go-playground/universal-translator v0.18.1/go.mod h1:xekY+UJKNuX9WP91TpwSH2VMlDf28Uj24BCp08ZFTUY=
 github.com/go-playground/validator/v10 v10.14.0 h1:vgvQWe3XCz3gIeFDm/HnTIbj6UGmg/+t63MyGU2n5js=
 github.com/go-playground/validator/v10 v10.14.0/go.mod h1:9iXMNT7sEkjXb0I+enO7QXmzG6QCsPWY4zveKFVRSyU=
+github.com/go-playground/validator/v10 v10.22.0 h1:k6HsTZ0sTnROkhS//R0O+55JgM8C4Bx7ia+JlgcnOao=
+github.com/go-playground/validator/v10 v10.22.0/go.mod h1:dbuPbCMFw/DrkbEynArYaCwl3amGuJotoKCe95atGMM=
 github.com/goccy/go-json v0.10.2 h1:CrxCmQqYDkv1z7lO7Wbh2HN93uovUHgrECaO5ZrCXAU=
 github.com/goccy/go-json v0.10.2/go.mod h1:6MelG93GURQebXPDq3khkgXZkazVtN9CRI+MGFi0w8I=
+github.com/goccy/go-json v0.10.3 h1:KZ5WoDbxAIgm2HNbYckL0se1fHD6rz5j4ywS6ebzDqA=
+github.com/goccy/go-json v0.10.3/go.mod h1:oq7eo15ShAhp70Anwd5lgX2pLfOS3QCiwU/PULtXL6M=
 github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
 github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
@@ -31,15 +52,25 @@ github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/gorilla/websocket v1.5.1 h1:gmztn0JnHVt9JZquRuzLw3g4wouNVzKL15iLr/zn/QY=
 github.com/gorilla/websocket v1.5.1/go.mod h1:x3kM2JMyaluk02fnUJpQuwD2dCS5NDG2ZHL0uE0tcaY=
+github.com/gorilla/websocket v1.5.3 h1:saDtZ6Pbx/0u+bgYQ3q96pZgCzfhKXGPqt7kZ72aNNg=
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 github.com/json-iterator/go v1.1.12 h1:PV8peI4a0ysnczrg+LtxykD8LfKY9ML6u2jnxaEnrnM=
 github.com/json-iterator/go v1.1.12/go.mod h1:e30LSqwooZae/UwlEbR2852Gd8hjQvJoHmT4TnhNGBo=
 github.com/klauspost/cpuid/v2 v2.0.9/go.mod h1:FInQzS24/EEf25PyTYn52gqo7WaD8xa0213Md/qVLRg=
 github.com/klauspost/cpuid/v2 v2.2.4 h1:acbojRNwl3o09bUq+yDCtZFc1aiwaAAxtcn8YkZXnvk=
 github.com/klauspost/cpuid/v2 v2.2.4/go.mod h1:RVVoqg1df56z8g3pUjL/3lE5UfnlrJX8tyFgg4nqhuY=
+github.com/klauspost/cpuid/v2 v2.2.8 h1:+StwCXwm9PdpiEkPyzBXIy+M9KUb4ODm0Zarf1kS5BM=
+github.com/klauspost/cpuid/v2 v2.2.8/go.mod h1:Lcz8mBdAVJIBVzewtcLocK12l3Y+JytZYpaMropDUws=
+github.com/knz/go-libedit v1.10.1 h1:0pHpWtx9vcvC0xGZqEQlQdfSQs7WRlAjuPvk3fOZDCo=
+github.com/knz/go-libedit v1.10.1/go.mod h1:MZTVkCWyz0oBc7JOWP3wNAzd002ZbM/5hgShxwh4x8M=
 github.com/leodido/go-urn v1.2.4 h1:XlAE/cm/ms7TE/VMVoduSpNBoyc2dOxHs5MZSwAN63Q=
 github.com/leodido/go-urn v1.2.4/go.mod h1:7ZrI8mTSeBSHl/UaRyKQW1qZeMgak41ANeCNaVckg+4=
+github.com/leodido/go-urn v1.4.0 h1:WT9HwE9SGECu3lg4d/dIA+jxlljEa1/ffXKmRjqdmIQ=
+github.com/leodido/go-urn v1.4.0/go.mod h1:bvxc+MVxLKB4z00jd1z+Dvzr47oO32F/QSNjSBOlFxI=
 github.com/mattn/go-isatty v0.0.19 h1:JITubQf0MOLdlGRuRq+jtsDlekdYPia9ZFsB8h/APPA=
 github.com/mattn/go-isatty v0.0.19/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
+github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
+github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
 github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
 github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd h1:TRLaZ9cD/w8PVh93nsPXa1VrQ6jlwL5oN8l14QlcNfg=
 github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
@@ -47,6 +78,8 @@ github.com/modern-go/reflect2 v1.0.2 h1:xBagoLtFs94CBntxluKeaWgTMpvLxC4ur3nMaC9G
 github.com/modern-go/reflect2 v1.0.2/go.mod h1:yWuevngMOJpCy52FWWMvUC8ws7m/LJsjYzDa0/r8luk=
 github.com/pelletier/go-toml/v2 v2.1.1 h1:LWAJwfNvjQZCFIDKWYQaM62NcYeYViCmWIwmOStowAI=
 github.com/pelletier/go-toml/v2 v2.1.1/go.mod h1:tJU2Z3ZkXwnxa4DPO899bsyIoywizdUvyaeZurnPPDc=
+github.com/pelletier/go-toml/v2 v2.2.3 h1:YmeHyLY8mFWbdkNWwpr+qIL2bEqT0o95WSdkNHvL12M=
+github.com/pelletier/go-toml/v2 v2.2.3/go.mod h1:MfCQTFTvCcUyyvvwm1+G6H/jORL20Xlb6rzQu9GuUkc=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
@@ -60,33 +93,50 @@ github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o
 github.com/stretchr/testify v1.8.2/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
 github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
 github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
 github.com/twitchyliquid64/golang-asm v0.15.1 h1:SU5vSMR7hnwNxj24w34ZyCi/FmDZTkS4MhqMhdFk5YI=
 github.com/twitchyliquid64/golang-asm v0.15.1/go.mod h1:a1lVb/DtPvCB8fslRZhAngC2+aY1QWCk3Cedj/Gdt08=
 github.com/ugorji/go/codec v1.2.11 h1:BMaWp1Bb6fHwEtbplGBGJ498wD+LKlNSl25MjdZY4dU=
 github.com/ugorji/go/codec v1.2.11/go.mod h1:UNopzCgEMSXjBc6AOMqYvWC1ktqTAfzJZUZgYf6w6lg=
+github.com/ugorji/go/codec v1.2.12 h1:9LC83zGrHhuUA9l16C9AHXAqEV/2wBQ4nkvumAE65EE=
+github.com/ugorji/go/codec v1.2.12/go.mod h1:UNopzCgEMSXjBc6AOMqYvWC1ktqTAfzJZUZgYf6w6lg=
 github.com/xthexder/go-jack v0.0.0-20220805234212-bc8604043aba h1:QighQ8fJJOqipXXurg9WghoImtvl7CHTpe21GDYdIkk=
 github.com/xthexder/go-jack v0.0.0-20220805234212-bc8604043aba/go.mod h1:T6DswVPJzBW/Xg64l/gohXVgSW81GwXyMws1fkqxlUg=
 golang.org/x/arch v0.0.0-20210923205945-b76863e36670/go.mod h1:5om86z9Hs0C8fWVUuoMHwpExlXzs5Tkyp9hOrfG7pp8=
 golang.org/x/arch v0.3.0 h1:02VY4/ZcO/gBOH6PUaoiptASxtXU10jazRCP865E97k=
 golang.org/x/arch v0.3.0/go.mod h1:5om86z9Hs0C8fWVUuoMHwpExlXzs5Tkyp9hOrfG7pp8=
+golang.org/x/arch v0.9.0 h1:ub9TgUInamJ8mrZIGlBG6/4TqWeMszd4N8lNorbrr6k=
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+golang.org/x/net v0.28.0 h1:a9JDOJc5GMUJ0+UDqmLT86WiEy7iWyIhz8gz8E4e5hE=
+golang.org/x/net v0.28.0/go.mod h1:yqtgsTWOOnlGLG9GFRrK3++bGOUEkNBoHZc8MEDWPNg=
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+nullprogram.com/x/optparse v1.0.0/go.mod h1:KdyPE+Igbe0jQUrVfMqDMeJQIJZEuyV7pjYmp6pbG50=
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jack.go

@@ -2,14 +2,13 @@ package main
 
 import (
 	"fmt"
-	"os"
 
 	"github.com/xthexder/go-jack"
 )
 
 var jackClient *jack.Client
 
-func initJack(done chan os.Signal) {
+func initJack() {
 	jackClient, _ = jack.ClientOpen(config.Jack.ClientName, jack.NoStartServer)
 	if jackClient == nil {
 		fmt.Println("Could not connect to jack server.")
@@ -33,7 +32,7 @@ func stopJack() {
 
 func registerJackPort(name string, channels uint8, flags uint64) []*jack.Port {
 	if channels > 2 {
-		fmt.Printf("WARN! Parameters of jack port %s changed: more than 2 channels not implemented, using 2 channels", name)
+		fmt.Printf("WARN! Parameters of jack port %s changed: more than 2 channels not implemented, using 2 channels\n", name)
 		channels = 2
 	}
 

main.go

@@ -4,6 +4,7 @@ import (
 	"os"
 	"os/signal"
 	"syscall"
+	"time"
 )
 
 func main() {
@@ -19,12 +20,26 @@ func main() {
 
 	// Initialize enabled audio backends
 	if config.Jack.Enabled {
-		initJack(end)
+		initJack()
 	}
 
 	// Start audio routing
 	startRouting()
 
+	// Periodically save config files
+	ticker := time.NewTicker(5 * time.Second)
+	go func() {
+		for {
+			select {
+			case <-ticker.C:
+				saveConfigIfMarked("ports", portConfig)
+			case <-end:
+				ticker.Stop()
+				return
+			}
+		}
+	}()
+
 	// Wait until SIGINT received
 	<-end
 

routing.go

@@ -80,7 +80,7 @@ func registerPort(port *Port, portType string) {
 		}
 		port.object = registerJackPort(port.Name, port.Properties.Channels, uint64(jackFlag))
 	default:
-		fmt.Printf("WARN! Error loading port %s: Backend %s is not implemented!", port.UUID, backend)
+		fmt.Printf("WARN! Error loading port %s: Backend %s is not implemented!\n", port.UUID, backend)
 	}
 }
 
@@ -93,7 +93,7 @@ func unregisterPort(port *Port) {
 		unregisterJackPort(port.object)
 		port.object = nil
 	default:
-		fmt.Printf("WARN! Error unloading port %s: Backend %s is not implemented!", port.UUID, backend)
+		fmt.Printf("WARN! Error unloading port %s: Backend %s is not implemented!\n", port.UUID, backend)
 	}
 }
 

sample_configs/ports.toml

@@ -0,0 +1,2 @@
+Input = []
+Output = []