commit bc4cea580b248b8111422af957d436f1510e1c76 Author: minie4 Date: Sat Feb 24 23:03:18 2024 +0100 🎉 Implement working Audio Mixer backend with Jack support diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..42692a2 --- /dev/null +++ b/.gitignore @@ -0,0 +1,3 @@ +data/ +go-mix +apidoc/environments/ \ No newline at end of file diff --git a/api.go b/api.go new file mode 100644 index 0000000..3d3ff15 --- /dev/null +++ b/api.go @@ -0,0 +1,297 @@ +package main + +import ( + "fmt" + + "github.com/gin-gonic/gin" + "github.com/google/uuid" +) + +func initApi() { + gin.SetMode(gin.ReleaseMode) + router := gin.Default() + router.SetTrustedProxies(nil) + + router.GET("/api/ports", func(c *gin.Context) { + c.JSON(200, portConfig) + }) + router.GET("/api/port", handleGetPort) + router.POST("/api/ports", handleCreatePort) + router.DELETE("/api/ports", handleDeletePort) + + router.GET("/api/state", handleGetState) + router.PUT("/api/state", handleSetState) + + router.POST("/api/routes", handleCreateRoute) + router.PUT("/api/routes", handleSetRoute) + router.DELETE("/api/routes", handleDeleteRoute) + + router.Run(fmt.Sprintf("%s:%d", config.Web.Bind, config.Web.Port)) +} + +func handleGetPort(c *gin.Context) { + id := c.Query("UUID") + if id == "" { + c.JSON(400, gin.H{"success": false, "error": "`UUID` parameter missing!"}) + return + } + + port, portIndex, _ := findPort(id) + if portIndex < 0 { + c.JSON(400, gin.H{"success": false, "error": "Port with provided UUID does not exist!"}) + return + } + + c.JSON(200, port) +} + +type CreatePortRequest struct { + Name string + Backend string + Channels uint8 + Type string +} + +func handleCreatePort(c *gin.Context) { + var body CreatePortRequest + if err := c.BindJSON(&body); err != nil { + c.JSON(500, gin.H{"success": false, "error": "Parsing request body failed!"}) + return + } + if body.Name == "" || body.Backend == "" || body.Channels == 0 || body.Type == "" { + c.JSON(400, gin.H{"success": false, "error": "Required parameters missing!"}) + return + } + if body.Type != "input" && body.Type != "output" { + c.JSON(400, gin.H{"success": false, "error": "`Type` must either be `input` or `output`"}) + return + } + + id := uuid.New() + newPort := Port{ + UUID: id.String(), + Name: body.Name, + Properties: PortProperties{ + Backend: body.Backend, + Channels: body.Channels, + }, + State: PortState{ + Mute: false, + Volume: 0, + Balance: 0, + }, + Route: []PortRoute{}, + } + + if body.Type == "input" { + registerPort(&newPort, "input") + portConfig.Input = append(portConfig.Input, newPort) + } else { + registerPort(&newPort, "output") + portConfig.Output = append(portConfig.Output, newPort) + } + saveConfig("ports", &portConfig) + + c.JSON(200, gin.H{"success": true, "UUID": newPort.UUID}) +} + +type DeletePortRequest struct { + UUID string +} + +func handleDeletePort(c *gin.Context) { + var body DeletePortRequest + if err := c.BindJSON(&body); err != nil { + c.JSON(500, gin.H{"success": false, "error": "Parsing request body failed!"}) + return + } + if body.UUID == "" { + c.JSON(400, gin.H{"success": false, "error": "Required parameters missing!"}) + return + } + + port, portIndex, portType := findPort(body.UUID) + if portIndex < 0 { + c.JSON(400, gin.H{"success": false, "error": "Port with provided UUID does not exist!"}) + return + } + + // Remove the port from the configuration + if portType == "output" { + portConfig.Output = append(portConfig.Output[:portIndex], portConfig.Output[portIndex+1:]...) + } else { + portConfig.Input = append(portConfig.Input[:portIndex], portConfig.Input[portIndex+1:]...) + } + + // Unregister port + unregisterPort(port) + + saveConfig("ports", &portConfig) +} + +func handleGetState(c *gin.Context) { + id := c.Query("UUID") + if id == "" { + c.JSON(400, gin.H{"success": false, "error": "`UUID` parameter missing!"}) + return + } + + port, portIndex, _ := findPort(id) + if portIndex < 0 { + c.JSON(400, gin.H{"success": false, "error": "Port with provided UUID does not exist!"}) + return + } + + c.JSON(200, port.State) +} + +type SetPortRequest struct { + Mute *bool + Volume *float32 + Balance *float32 +} + +func handleSetState(c *gin.Context) { + var body SetPortRequest + err := c.BindJSON(&body) + if err != nil { + c.JSON(500, gin.H{"success": false, "error": "Parsing request body failed!"}) + return + } + + id := c.Query("UUID") + if id == "" { + c.JSON(400, gin.H{"success": false, "error": "`UUID` parameter missing!"}) + return + } + + port, portIndex, _ := findPort(id) + if portIndex < 0 { + c.JSON(400, gin.H{"success": false, "error": "Port with provided UUID does not exist!"}) + return + } + + if body.Mute != nil { + port.State.Mute = *body.Mute + } + if body.Volume != nil { + port.State.Volume = *body.Volume + } + if body.Balance != nil { + port.State.Balance = *body.Balance + } + + c.JSON(200, gin.H{"success": true, "state": port.State}) + saveConfig("ports", &portConfig) +} + +type CreateRouteRequest struct { + To string +} + +func handleCreateRoute(c *gin.Context) { + var body CreateRouteRequest + err := c.BindJSON(&body) + if err != nil { + c.JSON(500, gin.H{"success": false, "error": "Parsing request body failed!"}) + return + } + + id := c.Query("UUID") + if id == "" || body.To == "" { + c.JSON(400, gin.H{"success": false, "error": "Required parameters missing!"}) + return + } + + from, fromIndex, fromType := findPort(id) + _, toIndex, toType := findPort(body.To) + if fromIndex < 0 || toIndex < 0 { + c.JSON(400, gin.H{"success": false, "error": "One of `UUID` or `To` does not exist!"}) + return + } + if fromType != "input" || toType != "output" { + c.JSON(400, gin.H{"success": false, "error": "`UUID` needs to be an input and `To` an output port!"}) + return + } + + from.Route = append(from.Route, PortRoute{ToUUID: body.To, Mute: true, Volume: 0, Balance: 0}) + saveConfig("ports", &portConfig) + + c.JSON(200, gin.H{"success": true}) +} + +type SetRouteRequest struct { + Mute *bool + Volume *float32 + Balance *float32 +} + +func handleSetRoute(c *gin.Context) { + var body SetRouteRequest + err := c.BindJSON(&body) + if err != nil { + c.JSON(500, gin.H{"success": false, "error": "Parsing request body failed!"}) + return + } + + fromId := c.Query("UUID") + toId := c.Query("To") + if fromId == "" || toId == "" { + c.JSON(400, gin.H{"success": false, "error": "Required parameters missing!"}) + return + } + + from, fromIndex, _ := findPort(fromId) + if fromIndex < 0 { + c.JSON(400, gin.H{"success": false, "error": "Port with provided UUID does not exist!"}) + return + } + for i, r := range from.Route { + if r.ToUUID != toId { + continue + } + + if body.Mute != nil { + from.Route[i].Mute = *body.Mute + } + if body.Volume != nil { + from.Route[i].Volume = *body.Volume + } + if body.Balance != nil { + from.Route[i].Balance = *body.Balance + } + + saveConfig("ports", &portConfig) + c.JSON(200, gin.H{"success": true}) + return + } + + c.JSON(200, gin.H{"success": false, "error": "No such route exists!"}) +} + +func handleDeleteRoute(c *gin.Context) { + fromId := c.Query("UUID") + toId := c.Query("To") + if fromId == "" || toId == "" { + c.JSON(400, gin.H{"success": false, "error": "Required parameters missing!"}) + return + } + + from, fromIndex, _ := findPort(fromId) + if fromIndex < 0 { + c.JSON(400, gin.H{"success": false, "error": "Port with provided UUID does not exist!"}) + return + } + for i, r := range from.Route { + if r.ToUUID != toId { + continue + } + + from.Route = append(from.Route[:i], from.Route[i+1:]...) + saveConfig("ports", &portConfig) + c.JSON(200, gin.H{"success": true}) + return + } + + c.JSON(200, gin.H{"success": false, "error": "No such route exists!"}) +} diff --git a/config.go b/config.go new file mode 100644 index 0000000..0fd6e47 --- /dev/null +++ b/config.go @@ -0,0 +1,72 @@ +package main + +import ( + "embed" + "errors" + "fmt" + "os" + + "github.com/pelletier/go-toml/v2" +) + +const CONFIG_DIR = "./data" + +//go:embed sample_configs/* +var sampleConfig embed.FS + +type Config struct { + Web struct { + Bind string `toml:"bind"` + Port int `toml:"port"` + } `toml:"web"` + Jack struct { + Enabled bool `toml:"enabled"` + ClientName string `toml:"client_name"` + } `toml:"jack"` +} + +var config Config + +// 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(dest_path); errors.Is(err, os.ErrNotExist) { + content, err := sampleConfig.ReadFile(source_path) + if err != nil { + fmt.Printf("Warning! Default config for `%s` does not exist!\n", name) + return + } + os.WriteFile(dest_path, content, 0644) + } +} + +// Load config from `.toml` file into a struct +func loadConfig(name string, dest interface{}) { + createDefaultConfig(name) + + file, err := os.ReadFile(fmt.Sprintf("%s/%s.toml", CONFIG_DIR, name)) + if err != nil { + fmt.Println(err) + os.Exit(1) + } + + err = toml.Unmarshal(file, dest) + if err != nil { + fmt.Println(err) + os.Exit(1) + } +} + +// Save struct as a `.toml` file +func saveConfig(name string, dest interface{}) { + bin, err := toml.Marshal(dest) + if err != nil { + fmt.Println(err) + } + err = os.WriteFile(fmt.Sprintf("%s/%s.toml", CONFIG_DIR, name), bin, 0644) + if err != nil { + fmt.Println(err) + } +} diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..6692187 --- /dev/null +++ b/go.mod @@ -0,0 +1,36 @@ +module minie4.de/go-mix + +go 1.21 + +require ( + github.com/gin-gonic/gin v1.9.1 + github.com/google/uuid v1.6.0 + github.com/pelletier/go-toml/v2 v2.1.1 + 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/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/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/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 v0.9.0 // indirect + golang.org/x/net v0.10.0 // indirect + golang.org/x/sys v0.8.0 // indirect + golang.org/x/text v0.9.0 // indirect + google.golang.org/protobuf v1.30.0 // indirect + gopkg.in/yaml.v3 v3.0.1 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..7e653b1 --- /dev/null +++ b/go.sum @@ -0,0 +1,90 @@ +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/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/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/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/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= +github.com/go-playground/locales v0.14.1/go.mod h1:hxrqLVvrK65+Rwrd5Fc6F2O76J/NuW9t0sjnWqG1slY= +github.com/go-playground/universal-translator v0.18.1 h1:Bcnm0ZwsGyWbCzImXv+pAJnYK9S473LQFuzCbDbfSFY= +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/goccy/go-json v0.10.2 h1:CrxCmQqYDkv1z7lO7Wbh2HN93uovUHgrECaO5ZrCXAU= +github.com/goccy/go-json v0.10.2/go.mod h1:6MelG93GURQebXPDq3khkgXZkazVtN9CRI+MGFi0w8I= +github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk= +github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU= 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+func initJack(done chan os.Signal) { + jackClient, _ = jack.ClientOpen(config.Jack.ClientName, jack.NoStartServer) + if jackClient == nil { + fmt.Println("Could not connect to jack server.") + return + } + + if code := jackClient.SetProcessCallback(processJackCb); code != 0 { + fmt.Println("Failed to set process callback.") + return + } + + if code := jackClient.Activate(); code != 0 { + fmt.Println("Failed to activate client:", jack.StrError(code)) + return + } +} + +func stopJack() { + jackClient.Close() +} + +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) + channels = 2 + } + + var i uint8 = 0 + var ports []*jack.Port = []*jack.Port{} + for i < channels { + i++ + portName := fmt.Sprintf("%s_%d", name, i) + port := jackClient.PortRegister(portName, jack.DEFAULT_AUDIO_TYPE, flags, 0) + if port == nil { + fmt.Printf("WARN! Failed registering jack port %s\n", portName) + continue + } + ports = append(ports, port) + } + return ports +} + +func unregisterJackPort(ports []*jack.Port) { + for _, p := range ports { + ret := jackClient.PortUnregister(p) + if ret != 0 { + fmt.Printf("WARN! Failed unregistering jack port!\n") + } + } +} diff --git a/main.go b/main.go new file mode 100644 index 0000000..6e76c46 --- /dev/null +++ b/main.go @@ -0,0 +1,34 @@ +package main + +import ( + "os" + "os/signal" + "syscall" +) + +func main() { + // Init exit channel + end := make(chan os.Signal, 1) + signal.Notify(end, syscall.SIGINT, syscall.SIGTERM) + + // Load config.toml file + loadConfig("config", &config) + + // Initialize REST API + go initApi() + + // Initialize enabled audio backends + if config.Jack.Enabled { + initJack(end) + } + + // Start audio routing + startRouting() + + // Wait until SIGINT received + <-end + + if config.Jack.Enabled { + stopJack() + } +} diff --git a/routing.go b/routing.go new file mode 100644 index 0000000..183e6d2 --- /dev/null +++ b/routing.go @@ -0,0 +1,198 @@ +package main + +import ( + "fmt" + + "github.com/xthexder/go-jack" +) + +type PortState struct { + Mute bool + Volume float32 + Balance float32 +} + +type PortProperties struct { + Backend string + Channels uint8 +} + +type PortRoute struct { + ToUUID string + Mute bool + Volume float32 + Balance float32 +} + +type Port struct { + UUID string + Name string + Properties PortProperties + State PortState + Route []PortRoute + object []*jack.Port +} + +var portConfig struct { + Input []Port + Output []Port +} + +var portsInited bool = false + +// Find index and pointer of port +func findPort(findUUID string) (*Port, int, string) { + var port *Port + var portIndex int = -1 + var portType string + for i, p := range portConfig.Input { + if p.UUID == findUUID { + port = &portConfig.Input[i] + portIndex = i + portType = "input" + } + } + for i, p := range portConfig.Output { + if p.UUID == findUUID { + port = &portConfig.Output[i] + portIndex = i + portType = "output" + } + } + + return port, portIndex, portType +} + +func registerPort(port *Port, portType string) { + switch backend := port.Properties.Backend; backend { + case "jack": + if !config.Jack.Enabled { + return + } + var jackFlag int + if portType == "input" { + jackFlag = jack.PortIsInput + } else if portType == "output" { + jackFlag = jack.PortIsOutput + } else { + fmt.Printf("WARN! Trying to register port with invalid type `%s`\n", portType) + return + } + 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) + } +} + +func unregisterPort(port *Port) { + switch backend := port.Properties.Backend; backend { + case "jack": + if !config.Jack.Enabled { + return + } + unregisterJackPort(port.object) + port.object = nil + default: + fmt.Printf("WARN! Error unloading port %s: Backend %s is not implemented!", port.UUID, backend) + } +} + +func startRouting() { + // Load port configuration from config file + loadConfig("ports", &portConfig) + + // Register ports + for i := range portConfig.Input { + registerPort(&portConfig.Input[i], "input") + } + for i := range portConfig.Output { + registerPort(&portConfig.Output[i], "output") + } + + portsInited = true +} + +type JackOutputBuffers struct { + UUID string + Buffers [][]jack.AudioSample +} + +func addToBuffer(src *[]jack.AudioSample, dst *[]jack.AudioSample, volume float32) { + for i, sample := range *src { + (*dst)[i] += sample * jack.AudioSample(volume) + } +} + +func calcBalanceFactor(ch uint8, balance float32) float32 { + if ch == 0 { + return max(0, min(1, 1-balance)) + } else { + return max(0, min(1, 1+balance)) + } +} + +func processJackCb(nframes uint32) int { + if !portsInited { + return 0 + } + + // Get memory addresses to write to for all outputs + var outputBuffers []JackOutputBuffers = []JackOutputBuffers{} + for _, out := range portConfig.Output { + outputBuffer := JackOutputBuffers{out.UUID, [][]jack.AudioSample{}} + for _, port := range out.object { + buffer := port.GetBuffer(nframes) + for i := range buffer { + buffer[i] = 0 + } + outputBuffer.Buffers = append(outputBuffer.Buffers, buffer) + } + outputBuffers = append(outputBuffers, outputBuffer) + } + + // Write audio data from every input to all outputs it routes to + for _, in := range portConfig.Input { + if in.State.Mute { + continue + } + + // For every channel + for ch := uint8(0); ch < in.Properties.Channels; ch++ { + if in.object == nil || uint8(len(in.object)) <= ch { + // Input is not initialized + continue + } + chSamples := in.object[ch].GetBuffer(nframes) + + // For every route that exists for the input + for _, route := range in.Route { + for _, out := range outputBuffers { + if out.UUID != route.ToUUID { + continue + } + + if out.Buffers == nil || uint8(len(out.Buffers)) <= ch { + // Output is not initialized + continue + } + + routeVolume := in.State.Volume * route.Volume * calcBalanceFactor(ch, in.State.Balance) + + if in.Properties.Channels < uint8(len(out.Buffers)) { + // If input is mono and output is stereo, write to both output channels at once + for i, buf := range out.Buffers { + finalVolume := routeVolume * calcBalanceFactor(uint8(i), route.Balance) + addToBuffer(&chSamples, &buf, finalVolume) + } + } else { + // Else only write to current channel (or channel 0 if output is mono) + finalVolume := routeVolume * calcBalanceFactor(ch, route.Balance) + index := min(uint8(len(out.Buffers)-1), ch) + addToBuffer(&chSamples, &out.Buffers[index], finalVolume) + } + } + } + } + } + return 0 +} diff --git a/sample_configs/config.toml b/sample_configs/config.toml new file mode 100644 index 0000000..279f9ae --- /dev/null +++ b/sample_configs/config.toml @@ -0,0 +1,7 @@ +[web] +bind = "0.0.0.0" +port = 8080 + +[jack] +enabled = true +client_name = "go-mix Jack" \ No newline at end of file diff --git a/sample_configs/ports.toml b/sample_configs/ports.toml new file mode 100644 index 0000000..e69de29