🎉 Implement working Audio Mixer backend with Jack support

This commit is contained in:
2024-02-24 23:03:18 +01:00
commit bc4cea580b
10 changed files with 799 additions and 0 deletions

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.gitignore vendored Normal file
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data/
go-mix
apidoc/environments/

297
api.go Normal file
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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!"})
}

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config.go Normal file
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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)
}
}

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go.mod Normal file
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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
)

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go.sum Normal file
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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=
github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
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/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/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/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/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=
github.com/modern-go/reflect2 v1.0.2 h1:xBagoLtFs94CBntxluKeaWgTMpvLxC4ur3nMaC9Gz0M=
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/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=
github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
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/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/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/crypto v0.9.0 h1:LF6fAI+IutBocDJ2OT0Q1g8plpYljMZ4+lty+dsqw3g=
golang.org/x/crypto v0.9.0/go.mod h1:yrmDGqONDYtNj3tH8X9dzUun2m2lzPa9ngI6/RUPGR0=
golang.org/x/net v0.10.0 h1:X2//UzNDwYmtCLn7To6G58Wr6f5ahEAQgKNzv9Y951M=
golang.org/x/net v0.10.0/go.mod h1:0qNGK6F8kojg2nk9dLZ2mShWaEBan6FAoqfSigmmuDg=
golang.org/x/sys v0.0.0-20220704084225-05e143d24a9e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.8.0 h1:EBmGv8NaZBZTWvrbjNoL6HVt+IVy3QDQpJs7VRIw3tU=
golang.org/x/sys v0.8.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/text v0.9.0 h1:2sjJmO8cDvYveuX97RDLsxlyUxLl+GHoLxBiRdHllBE=
golang.org/x/text v0.9.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
google.golang.org/protobuf v1.30.0 h1:kPPoIgf3TsEvrm0PFe15JQ+570QVxYzEvvHqChK+cng=
google.golang.org/protobuf v1.30.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
rsc.io/pdf v0.1.1/go.mod h1:n8OzWcQ6Sp37PL01nO98y4iUCRdTGarVfzxY20ICaU4=

62
jack.go Normal file
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package main
import (
"fmt"
"os"
"github.com/xthexder/go-jack"
)
var jackClient *jack.Client
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")
}
}
}

34
main.go Normal file
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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()
}
}

198
routing.go Normal file
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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
}

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[web]
bind = "0.0.0.0"
port = 8080
[jack]
enabled = true
client_name = "go-mix Jack"

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