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.idea/
/deepspeech.pbmm
/deepspeech.scorer
/trident
/trident.toml

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GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
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into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.

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all: action.go config.go audio.go logging.go main.go plugins.go
go build
install: trident trident.example.toml deepspeech.pbmm deepspeech.scorer
rm -rf /opt/trident/
mkdir -p /opt/trident/
install -Dm755 trident /opt/trident/trident
cp model.pbmm /opt/trident/
cp model.scorer /opt/trident/
cp trident.example.toml /opt/trident/trident.toml
cp -r plugins /opt/trident/
.PHONY: all install

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# Trident
Personal voice assistant written in go using DeepSpeech. This was mainly created for personal use, so there may be some edge cases unaccounted for.
---
#### Prerequisites
The prerequisites for trident are:
- libdeepspeech and DeepSpeech models (speech to text)
- mimic (text to speech)
- go
`libdeepspeech` along with its models can be found in [its github releases](https://github.com/mozilla/DeepSpeech/releases/). Be sure to download the `native_client` tarball for your platform and the `.pbmm` and `.scorer` files.
`mimic` can be installed via an [install script](https://github.com/MycroftAI/mycroft-core/blob/dev/scripts/install-mimic.sh) or its AUR package if using Arch Linux or its derivatives.
### Installation
Move the previously downloaded models (`.pbmm` and `.scorer`) into this repo as `deepspeech.pbmm` and `deepspeech.scorer`. Then, follow the next steps.
To build trident, run:
```shell
make
```
After that, install by running:
```shell
sudo make install
```
### Customization
To change the activation tone, replace the `activate.wav` file with any valid wav file and rebuild. The file will be embedded in the executable via `//go:embed`.
Trident has a config file called `trident.toml`. It will first look for it in `<user config directory>/trident.toml` (config directory as defined by `os.UserConfigDir()`), then it will look for it in the same directory as the executable.

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/*
* Copyright (C) 2021 Arsen Musayelyan
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package main
import (
"os"
"regexp"
"strconv"
)
// Attempt to match function in config to provided string
func getAction(c *Config, tts *string) (*Action, bool) {
// For every action in config
for _, action := range c.Actions {
// Attempt to compile configured regular expression
regex, err := regexp.Compile(action.Phrase)
if err != nil {
return nil, false
}
// Check if string matches action
matched := regex.MatchString(*tts)
if matched {
return &action, true
}
}
return nil, false
}
// Perform action with input
func performAction(a *Action, tts *string, plugins map[string]pluginFunc) (bool, error) {
// Attempt to compile configured regular expression
regex, err := regexp.Compile(a.Phrase)
if err != nil {
return false, err
}
// Find string submatches in string using regular expression
match := regex.FindStringSubmatch(*tts)
strExpanded := false
// Expand instances of $var in action input
retCmd := os.Expand(a.Input, func(in string) string {
strExpanded = true
// Attempt to convert string to integer
inputInt, err := strconv.Atoi(in)
// If successful
if err == nil {
// If index nonexistent, return empty string
if len(match) <= inputInt {
return ""
}
// Return match at index
return match[inputInt]
}
// Get subexpression index for input string
subIndex := regex.SubexpIndex(in)
// If regex contains subexpression with specified name and match contains index
if subIndex != -1 && len(match) >= subIndex {
// Return string matched at index
return match[subIndex]
}
// If nothing worked, put variable back
return "$" + in
})
// If output remained the same and string was expanded
if a.Input == retCmd && strExpanded {
return false, nil
}
// If type of action is noop, do nothing and return
if a.Type == "noop" {
return true, nil
}
// Run plugin with input
plugins[a.Type](retCmd, a.Data)
return true, nil
}

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/*
* Copyright (C) 2021 Arsen Musayelyan
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package main
import (
"bytes"
_ "embed"
"encoding/binary"
"errors"
ds "github.com/asticode/go-astideepspeech"
"github.com/gen2brain/malgo"
"github.com/youpy/go-wav"
"io"
"sync"
)
// Safe stream using mutex to fix race conditions
type SafeStream struct {
sync.Mutex
*ds.Stream
}
// Convert raw audio to slice of int16
func convToInt16Slice(r io.Reader) ([]int16, error) {
// Create nil output array
var out []int16
for {
var sample int16
// Attempt to read little endian binary from sample into int16
err := binary.Read(r, binary.LittleEndian, &sample)
switch {
case errors.Is(err, io.EOF):
// If error is EOF, return output with no error
return out, nil
case err != nil:
// If error is something other than EOF, return error
return nil, err
}
// If sample contains audio
if sample != 0 {
// Add it to output
out = append(out, sample)
}
}
}
//go:embed activate.wav
var activationTone []byte
// Play activation tone to audio device
func playActivationTone(ctx *malgo.AllocatedContext) error {
// Create new reader for embedded activation tone
buf := bytes.NewReader(activationTone)
// Create new wav reader for activation tone reader
wavReader := wav.NewReader(buf)
// Get wav file format
format, err := wavReader.Format()
if err != nil {
return err
}
// Set device configuration options
deviceConfig := malgo.DefaultDeviceConfig(malgo.Playback)
deviceConfig.Playback.Format = malgo.FormatS16
deviceConfig.Playback.Channels = uint32(format.NumChannels)
deviceConfig.SampleRate = format.SampleRate
deviceConfig.Alsa.NoMMap = 1
// Create new channel waiting for completion
done := make(chan bool)
onSamples := func(output, _ []byte, _ uint32) {
// Read as much audio into output as will fit
n, err := io.ReadFull(wavReader, output)
// If error occurred or no bytes read
if err != nil || n == 0 {
// Signal completion
done <- true
}
}
// Initialize audio device using configuration
device, err := malgo.InitDevice(ctx.Context, deviceConfig, malgo.DeviceCallbacks{
Data: onSamples,
})
if err != nil {
return err
}
// Uninitialize at end of function
defer device.Uninit()
// Start audio device
err = device.Start()
if err != nil {
return err
}
// Wait for completion signal
<-done
return nil
}

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/*
* Copyright (C) 2021 Arsen Musayelyan
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package main
import (
"github.com/pelletier/go-toml"
"go/build"
"os"
"path/filepath"
"time"
)
// Config stores the root of the TOML config
type Config struct {
ActivationPhrase string `toml:"activationPhrase"`
ActivationTime time.Duration `toml:"activationTime"`
IPCEnabled bool `toml:"ipcEnabled"`
Actions []Action `toml:"action"`
}
// Action stores voice-activated actions in config
type Action struct {
Name string `toml:"name"`
Type string `toml:"type"`
Phrase string `toml:"phrase"`
Input string `toml:"input,omitempty"`
Data map[string]interface{} `toml:"data,omitempty"`
}
// getConfig parses and returns a TOML config
func getConfig(path string) (*Config, error) {
// Open file at given path
file, err := os.Open(filepath.Clean(path))
if err != nil {
return nil, err
}
// Create new nil struct
var out Config
// Create new TOML decoder reading from file
dec := toml.NewDecoder(file)
// Decode contents of file to struct
err = dec.Decode(&out)
if err != nil {
return nil, err
}
return &out, nil
}
// Get all relevant paths
func configEnv() (gopath, configDir, execDir, confPath string) {
// Get path to currently running executable
execPath, err := os.Executable()
if err != nil {
log.Fatal().Err(err).Msg("Error getting executable path")
}
// Get current user's configuration directory
confDir, err := os.UserConfigDir()
if err != nil {
log.Fatal().Err(err).Msg("Error getting config directory")
}
// Try to get GOPATH environment variable
gopath = os.Getenv("GOPATH")
// If not set
if gopath == "" {
// Use default GOPATH
gopath = build.Default.GOPATH
}
// Set configuration directory to <user config dir>/trident
configDir = filepath.Join(confDir, "trident")
// Set executable directory to the directory of execPath
execDir = filepath.Dir(execPath)
// Set config path to file trident.toml inside config directory
confPath = filepath.Join(configDir, "trident.toml")
// If file is not accessible
if _, err := os.Stat(confPath); err != nil {
// Use config in same executable directory
confPath = filepath.Join(execDir, "trident.toml")
}
// Return all variables
return
}

14
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module trident
go 1.16
require (
github.com/asticode/go-astideepspeech v0.10.0
github.com/gen2brain/malgo v0.10.29
github.com/pelletier/go-toml v1.9.0
github.com/rs/zerolog v1.21.0
github.com/spf13/pflag v1.0.5
github.com/stretchr/testify v1.7.0 // indirect
github.com/traefik/yaegi v0.9.17
github.com/youpy/go-wav v0.1.0
)

54
go.sum Normal file
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@ -0,0 +1,54 @@
github.com/asticode/go-astideepspeech v0.10.0 h1:iMns9KIFdNrzmR77akHIsNM/qUO4IP6/N/WKX5SZr1o=
github.com/asticode/go-astideepspeech v0.10.0/go.mod h1:SJCkfh5e79BgSQqKEEAtfjZT0yOekjKEiB3FVOTrpog=
github.com/cheekybits/is v0.0.0-20150225183255-68e9c0620927/go.mod h1:h/aW8ynjgkuj+NQRlZcDbAbM1ORAbXjXX77sX7T289U=
github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
github.com/cryptix/wav v0.0.0-20180415113528-8bdace674401/go.mod h1:knK8fd+KPlGGqSUWogv1DQzGTwnfUvAi0cIoWyOG7+U=
github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/gen2brain/malgo v0.10.29 h1:bTYiUTUKJsEomNby+W0hgyLrOttUXIk4lTEnKA54iqM=
github.com/gen2brain/malgo v0.10.29/go.mod h1:zHSUNZAXfCeNsZou0RtQ6Zk7gDYLIcKOrUWtAdksnEs=
github.com/pelletier/go-toml v1.9.0 h1:NOd0BRdOKpPf0SxkL3HxSQOG7rNh+4kl6PHcBPFs7Q0=
github.com/pelletier/go-toml v1.9.0/go.mod h1:u1nR/EPcESfeI/szUZKdtJ0xRNbUoANCkoOuaOx1Y+c=
github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
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/rs/xid v1.2.1/go.mod h1:+uKXf+4Djp6Md1KODXJxgGQPKngRmWyn10oCKFzNHOQ=
github.com/rs/zerolog v1.21.0 h1:Q3vdXlfLNT+OftyBHsU0Y445MD+8m8axjKgf2si0QcM=
github.com/rs/zerolog v1.21.0/go.mod h1:ZPhntP/xmq1nnND05hhpAh2QMhSsA4UN3MGZ6O2J3hM=
github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
github.com/traefik/yaegi v0.9.17 h1:sJ4Wk6S7HHHXtJnOuxC/3qjdQKRy3q9ZhNP0ZGL7Ltw=
github.com/traefik/yaegi v0.9.17/go.mod h1:FAYnRlZyuVlEkvnkHq3bvJ1lW5be6XuwgLdkYgYG6Lk=
github.com/youpy/go-riff v0.0.0-20131220112943-557d78c11efb h1:RDh7U5Di6o7fblIBe7rVi9KnrcOXUbLwvvLLdP2InSI=
github.com/youpy/go-riff v0.0.0-20131220112943-557d78c11efb/go.mod h1:83nxdDV4Z9RzrTut9losK7ve4hUnxUR8ASSz4BsKXwQ=
github.com/youpy/go-wav v0.1.0 h1:MehxSoflnZoDmiILNQ6WMQpTuRuFpRnq213YqQ7WPRk=
github.com/youpy/go-wav v0.1.0/go.mod h1:ZyTUfNrGKaH/wPNGf2W9Se6sNtZRlY+b98kckKmYLS8=
github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210119212857-b64e53b001e4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
golang.org/x/tools v0.1.0/go.mod h1:xkSsbof2nBLbhDlRMhhhyNLN/zl3eTqcnHD5viDpcZ0=
golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

27
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/*
* Copyright (C) 2021 Arsen Musayelyan
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package main
import (
"github.com/rs/zerolog"
zlog "github.com/rs/zerolog/log"
"os"
)
// Set global logger to zerolog
var log = zlog.Output(zerolog.ConsoleWriter{Out: os.Stderr})

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@ -0,0 +1,327 @@
/*
* Copyright (C) 2021 Arsen Musayelyan
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package main
import (
"bufio"
"bytes"
ds "github.com/asticode/go-astideepspeech"
"github.com/gen2brain/malgo"
flag "github.com/spf13/pflag"
"net"
"os"
"os/signal"
"path/filepath"
"strconv"
"strings"
"syscall"
"time"
)
var verbose *bool
var execDir string
var configDir string
func main() {
// Configure environment (paths to resources)
var gopath, confPath string
gopath, configDir, execDir, confPath = configEnv()
// Define and parse command line flags
tfLogLevel := flag.Int("tf-log-level", 2, "Log level for TensorFlow")
verbose = flag.BoolP("verbose", "v", false, "Log more events")
configPath := flag.StringP("config", "c", confPath, "Location of trident TOML config")
modelPath := flag.StringP("model", "m", filepath.Join(execDir, "deepspeech.pbmm"), "Path to DeepSpeech model")
scorerPath := flag.StringP("scorer", "s", filepath.Join(execDir, "deepspeech.scorer"), "Path to DeepSpeech scorer")
socketPath := flag.StringP("socket", "S", filepath.Join(configDir, "trident.sock"), "Path to UNIX socket for IPC")
GOPATH := flag.String("gopath", gopath, "GOPATH for use with plugins")
flag.Parse()
// Set TensorFlow log level to specified level (default 2)
_ = os.Setenv("TF_CPP_MIN_LOG_LEVEL", strconv.Itoa(*tfLogLevel))
// Get and parse TOML config
config, err := getConfig(*configPath)
if err != nil {
log.Fatal().Err(err).Msg("Error getting TOML config")
}
// Create new channel storing os.Signal
sigChannel := make(chan os.Signal, 1)
// Notify channel upon reception of specified signals
signal.Notify(sigChannel,
syscall.SIGINT,
syscall.SIGTERM,
syscall.SIGHUP,
syscall.SIGQUIT,
)
// Create new goroutine to handle signals gracefully
go func() {
// Wait for signal
sig := <-sigChannel
// Log reception of signal
log.Info().Str("signal", sig.String()).Msg("Received signal, shutting down")
// If IPC is enabled in the config, remove the UNIX socket
if config.IPCEnabled {
_ = os.RemoveAll(*socketPath)
}
// Exit with code 0
os.Exit(0)
}()
// Create new DeepSpeech model
model, err := ds.New(*modelPath)
if err != nil {
log.Fatal().Err(err).Msg("Error opening DeepSpeech model")
}
//model.SetBeamWidth(50)
// Initialize available plugins
plugins := initPlugins(*GOPATH)
// If IPC is enabled in config
if config.IPCEnabled {
// Remove UNIX socket ignoring error
_ = os.RemoveAll(*socketPath)
// Listen on UNIX socket
ln, err := net.Listen("unix", *socketPath)
if err != nil {
log.Fatal().Err(err).Msg("Error listening on UNIX socket")
}
go func() {
for {
// Accept any connection when it arrives
conn, err := ln.Accept()
if err != nil {
log.Fatal().Err(err).Msg("Error accepting connection")
}
go func(conn net.Conn) {
// Close connection at end of function
defer conn.Close()
// Create new scanner for connection (default is ScanLines)
scanner := bufio.NewScanner(conn)
// Scan until EOF
for scanner.Scan() {
// If error encountered, return from function
if scanner.Err() != nil {
return
}
// Get text from scanner
input := scanner.Text()
// Attempt to match text to action and return action
action, ok := getAction(config, &input)
// If match founc
if ok {
// Log performing action
log.Info().Str("action", action.Name).Str("source", "socket").Msg("Performing action")
// Perform returned action
done, err := performAction(action, &input, plugins)
if err != nil {
log.Warn().Err(err).Str("action", action.Name).Msg("Error performing configured action")
}
// If action complete, close connection and return
if done {
conn.Close()
return
}
}
}
}(conn)
}
}()
}
// Initialize audio context
ctx, err := malgo.InitContext(nil, malgo.ContextConfig{}, func(message string) {
log.Warn().Msg(message)
})
if err != nil {
log.Fatal().Err(err).Msg("Error initializing malgo context")
}
// Uninitialize and free at end of function
defer func() {
_ = ctx.Uninit()
ctx.Free()
}()
// Set device configuration options
deviceConfig := malgo.DefaultDeviceConfig(malgo.Capture)
deviceConfig.Capture.Format = malgo.FormatS16
deviceConfig.Capture.Channels = 1
deviceConfig.Playback.Format = malgo.FormatS16
deviceConfig.Playback.Channels = 1
deviceConfig.SampleRate = uint32(model.SampleRate())
deviceConfig.Alsa.NoMMap = 1
// Create new buffer to store audio samples
captured := &bytes.Buffer{}
onRecvFrames := func(_, sample []byte, _ uint32) {
// Upon receipt of sample, write to buffer
captured.Write(sample)
}
log.Info().Msg("Listening to audio events")
// Initialize audio device using configuration options
device, err := malgo.InitDevice(ctx.Context, deviceConfig, malgo.DeviceCallbacks{
Data: onRecvFrames,
})
if err != nil {
log.Fatal().Err(err).Msg("Error initializing audio device")
}
// Uninitialize at end of function
defer device.Uninit()
// Start capture device (begin recording)
err = device.Start()
if err != nil {
log.Fatal().Err(err).Msg("Error starting capture device")
}
// Set DeepSpeech scorer
err = model.EnableExternalScorer(*scorerPath)
if err != nil {
log.Fatal().Err(err).Msg("Error opening DeepSpeech scorer")
}
// Create new stream for DeepSpeech model
sttStream, err := model.NewStream()
if err != nil {
log.Fatal().Err(err).Msg("Error creating DeepSpeech stream")
}
// Create a safe stream using sync.Mutex
safeStream := &SafeStream{Stream: sttStream}
// Create goroutine to clean stream every minute
go func() {
for {
time.Sleep(time.Minute)
// Lock mutex of stream
safeStream.Lock()
// Reset stream and buffer
resetStream(safeStream, model, captured)
if *verbose {
log.Debug().Msg("1m passed; cleaning stream")
}
// Unlock mutex of stream
safeStream.Unlock()
}
}()
var tts string
listenForActivation := true
for {
time.Sleep(time.Second)
// Convert captured raw audio to slice of int16
slice, err := convToInt16Slice(captured)
if err != nil {
log.Fatal().Err(err).Msg("Error converting captured audio feed")
}
// Reset buffer
captured.Reset()
// Lock mutex of stream
safeStream.Lock()
// Feed converted audio to stream
safeStream.FeedAudioContent(slice)
// Decode stream without destroying
tts, err = safeStream.IntermediateDecode()
if err != nil {
log.Fatal().Err(err).Msg("Error intermediate decoding stream")
}
// If decoded string contains activation phrase and listenForActivation is true
if strings.Contains(tts, config.ActivationPhrase) && listenForActivation {
// Play activation tone
err = playActivationTone(ctx)
if err != nil {
log.Fatal().Err(err).Msg("Error playing activation tone")
}
// Log detection of activation phrase
log.Info().Msg("Activation phrase detected")
// Reset stream and buffer
resetStream(safeStream, model, captured)
// Create new goroutine to listen for commands
go func() {
// Disable activation
listenForActivation = false
// Enable activation at end of function
defer func() {
listenForActivation = true
}()
// Create timeout channel to trigger after configured time
timeout := time.After(config.ActivationTime)
activationLoop:
for {
time.Sleep(100 * time.Millisecond)
select {
// If timeout has elapsed
case <-timeout:
log.Warn().Msg("Unknown command")
break activationLoop
// If timeout has not elapsed
default:
// Attempt to match decoded string to action
action, ok := getAction(config, &tts)
// If match found
if ok {
// Keep listening if user is talking
for {
// Get length of text to speech string
ttsLen := len(tts)
time.Sleep(time.Second)
// If length has not changed
if ttsLen == len(tts) {
// Break out of for loop
break
}
}
// Log performing action
log.Info().Str("action", action.Name).Str("source", "voice").Msg("Performing action")
// Perform action matched by getAction()
done, err := performAction(action, &tts, plugins)
if err != nil {
log.Warn().Err(err).Str("action", action.Name).Msg("Error performing configured action")
}
// If action is complete
if done {
// Lock mutex of stream
safeStream.Lock()
// Reset stream and buffer
resetStream(safeStream, model, captured)
// Unlock mutex of stream
safeStream.Unlock()
// Return from goroutine
return
}
}
}
}
}()
}
// Unlock mutex of stream
safeStream.Unlock()
}
}
// Function to reset stream and buffer
func resetStream(s *SafeStream, model *ds.Model, captured *bytes.Buffer) {
// Reset buffer
captured.Reset()
// Discard stream (workaround for lack of Clear function)
s.Discard()
// Create new stream, setting it to same location as old
s.Stream, _ = model.NewStream()
}

103
plugins.go Normal file
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/*
* Copyright (C) 2021 Arsen Musayelyan
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package main
import (
"fmt"
"github.com/traefik/yaegi/interp"
"github.com/traefik/yaegi/stdlib"
"github.com/traefik/yaegi/stdlib/unrestricted"
"io/fs"
"path/filepath"
)
// Create type for plugin functions
type pluginFunc func(string, map[string]interface{})
// Initialize all available plugins
func initPlugins(gopath string) map[string]pluginFunc {
log.Info().Msg("Initializing plugins")
out := map[string]pluginFunc{}
// Create new yaegi Go interpreter with appropriate GOPATH
i := interp.New(interp.Options{GoPath: gopath})
// Use standard library symbols
i.Use(stdlib.Symbols)
// Use unrestricted symbols (os/exec, syscall, etc.)
i.Use(unrestricted.Symbols)
// Use custom package
i.Use(tridentSymbols)
// Walk plugin directory
err := filepath.WalkDir(filepath.Join(execDir, "plugins"), func(path string, d fs.DirEntry, err error) error {
// If error encountered, return
if err != nil {
return err
}
// If current path is not a directory or it is the plugin root
if !d.IsDir() || d.Name() == "plugins" {
return nil
}
// Get name of plugin from directory name
pluginName := filepath.Base(path)
// IF plugin already exists, return error
if _, ok := out[pluginName]; ok {
return fmt.Errorf("plugin %s has already been initialized", pluginName)
}
// If verbose, log which plugin is being initialized
if *verbose {
log.Debug().Str("plugin", pluginName).Msg("Initializing plugin")
}
// Walk directory of specific plugin
err = filepath.WalkDir(path, func(path string, d fs.DirEntry, err error) error {
// If error encountered, return
if err != nil {
return err
}
// If file is not go source, skip
if filepath.Ext(path) != ".go" {
return nil
}
// Evaluate go file
_, err = i.EvalPath(path)
if err != nil {
return err
}
return nil
})
// If error encountered walking plugin, return
if err != nil {
return err
}
// Get RunPlugin symbol from current plugin
v, err := i.Eval(fmt.Sprintf("%s.RunPlugin", pluginName))
if err != nil {
return err
}
// Assert RunPlugin symbol as a plugin function and add it to out map
out[pluginName] = v.Interface().(func(string, map[string]interface{}))
return nil
})
// If error occurred walking directory, log fatally
if err != nil {
log.Fatal().Err(err).Msg("Error initializing plugins")
}
return out
}

44
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/*
* Copyright (C) 2021 Arsen Musayelyan
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
// shell is a Trident plugin that runs a command in a shell
package shell
import (
"os"
"os/exec"
)
func RunPlugin(program string, data map[string]interface{}) {
var shell string
var ok bool
// Attempt to get shell from config, asserting as string
shell, ok = data["shell"].(string)
// If unsuccessful
if !ok {
// Set shell to default (/bin/sh)
shell = "/bin/sh"
}
// Create command using configured shell or default (/bin/sh)
cmd := exec.Command(shell, "-c", program)
// Set command environment to system environment
cmd.Env = os.Environ()
// Set command's standard error to system standard error
cmd.Stderr = os.Stderr
// Run command, ignoring error
_ = cmd.Run()
}

31
plugins/time/time.go Normal file
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/*
* Copyright (C) 2021 Arsen Musayelyan
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
// time is a Trident plugin that says the current time using a synthesized voice
package time
import (
"time"
"trident"
)
func RunPlugin(_ string, _ map[string]interface{}) {
// Format time in a way the synthesized voice will understand
formattedTime := time.Now().Format("3 04 PM")
// Say formatted time using voice
trident.Say(formattedTime)
}

90
plugins/wolframalpha/wolframalpha.go Normal file
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/*
* Copyright (C) 2021 Arsen Musayelyan
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
// wolframalpha is a Trident plugin that queries the WolframAlpha API and says the result
package wolframalpha
import (
"encoding/xml"
"fmt"
"log"
"net/http"
"net/url"
"strings"
"trident"
)
// Result stores the result of the WolframAlpha query
type Result struct {
Pods []Pod `xml:"pod"`
}
// Pod stores pod tags from result
type Pod struct {
XMLName xml.Name `xml:"pod"`
ID string `xml:"id,attr"`
SubPods []SubPod `xml:"subpod"`
}
// SubPod stores subpod tags from pod
type SubPod struct {
XMLName xml.Name `xml:"subpod,omitempty"`
Plaintext *Plaintext `xml:"plaintext,omitempty"`
}
// Plaintext stores plaintext tags from subpod
type Plaintext struct {
XMLName xml.Name `xml:"plaintext"`
String string `xml:",chardata"`
}
func RunPlugin(query string, data map[string]interface{}) {
// Escape query for inclusion in URL
escapedQuery := url.QueryEscape(query)
// Query WolframAlpha API
res, err := http.Get(fmt.Sprintf("https://api.wolframalpha.com/v2/query?input=%s&appid=%s", escapedQuery, data["appid"].(string)))
if err != nil {
log.Fatalln(err)
}
// Close response body at end of function
defer res.Body.Close()
// Create new nil struct to store query results
var resStruct Result
// Create new XML decoder reading from API response body
dec := xml.NewDecoder(res.Body)
// Decode contents of response body into struct
err = dec.Decode(&resStruct)
if err != nil {
log.Fatalln(err)
}
// Create string builder to combine results
all := strings.Builder{}
for _, pod := range resStruct.Pods {
switch pod.ID {
case "Result", "RealSolution", "Solution":
// If pod ID is one of the above cases, write it to builder
all.WriteString(pod.ID)
for _, subpod := range pod.SubPods {
// Write string from subpod plaintext tag to builder
all.WriteString(subpod.Plaintext.String)
}
}
}
// Use voice to say built string
trident.Say(all.String())
}

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symbols.go Normal file
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/*
* Copyright (C) 2021 Arsen Musayelyan
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package main
import (
"github.com/traefik/yaegi/interp"
"os/exec"
"reflect"
)
// Create custom package for trident
var tridentSymbols = interp.Exports{"trident": {
"Say": reflect.ValueOf(Say),
}}
// Function to say text using mimic text-to-speech
func Say(text string, args ...string) {
// If mimic exists in PATH
if _, err := exec.LookPath("mimic"); err == nil {
// Set initial argument slice to contain text
argSlice := []string{"-t", text}
// Add any additional arguments to slice
argSlice = append(argSlice, args...)
// Create and run command
exec.Command("mimic", argSlice...).Run()
} else {
// If mimic does not exist in PATH, warn user
log.Warn().Err(err).Str("text", text).Msg("Cannot perform text to speech")
}
}

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trident.example.toml Normal file
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activationPhrase = "trident"
activationTime = "10s"
ipcEnabled = true
[[action]]
name = "dismiss"
type = "noop"
phrase = "dismiss"
[[action]]
name = "open"
type = "shell"
phrase = "open (?P<program>.+)"
input = "$program"
[[action]]
name = "time"
type = "time"
phrase = "what time is it|what is the time"
[[action]]
name = "ask"
type = "wolframalpha"
phrase = "calculate (?P<question>.+)"
input = '$question'
data = {"appid" = "someWolframAlphaAppID"}