Updated

Author: djthorpe

cmd/api/anthropic.go

@@ -40,8 +40,7 @@ func anthropicParse(flags *Flags, opts ...client.ClientOpt) error {
 	apiKey := flags.GetString("anthropic-api-key")
 	if apiKey == "" {
 		return fmt.Errorf("missing -anthropic-api-key flag")
-	}
-	if client, err := anthropic.New(flags.GetString("anthropic-api-key"), opts...); err != nil {
+	} else if client, err := anthropic.New(apiKey, opts...); err != nil {
 		return err
 	} else {
 		anthropicClient = client

cmd/api/bitwarden.go

@@ -139,6 +139,8 @@ func bwFolders(_ context.Context, w *tablewriter.Writer, _ []string) error {
 	if bwPassword != "" {
 		opts = append(opts, bitwarden.OptPassword(bwPassword))
 	}
+
+	// Retrieve the folders
 	folders, err := bwClient.Folders(opts...)
 	if err != nil {
 		return err

cmd/api/elevenlabs.go

@@ -0,0 +1,309 @@
+package main
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"io"
+	"regexp"
+	"strings"
+
+	// Packages
+	tablewriter "github.com/djthorpe/go-tablewriter"
+	"github.com/go-audio/audio"
+	"github.com/go-audio/wav"
+	client "github.com/mutablelogic/go-client"
+	elevenlabs "github.com/mutablelogic/go-client/pkg/elevenlabs"
+
+	// Namespace imports
+	. "github.com/djthorpe/go-errors"
+)
+
+///////////////////////////////////////////////////////////////////////////////
+// GLOBALS
+
+var (
+	elName       = "elevenlabs"
+	elClient     *elevenlabs.Client
+	elExt        = "mp3"
+	elBitrate    = uint64(32)    // in kbps
+	elSamplerate = uint64(44100) // in Hz
+	reVoiceId    = regexp.MustCompile("^[a-z0-9-]{20}$")
+)
+
+///////////////////////////////////////////////////////////////////////////////
+// LIFECYCLE
+
+func elRegister(flags *Flags) {
+	// Register flags required
+	flags.String(elName, "elevenlabs-api-key", "${ELEVENLABS_API_KEY}", "API Key")
+	flags.Float(elName, "similarity-boost", 0, "Similarity boost")
+	flags.Float(elName, "stability", 0, "Voice stability")
+	flags.Bool(elName, "use-speaker-boost", false, "Use speaker boost")
+	flags.Unsigned(elName, "bitrate", 0, "Bit rate (kbps)")
+	flags.Unsigned(elName, "samplerate", 0, "Sample rate (kHz)")
+
+	// Register command set
+	flags.Register(Cmd{
+		Name:        elName,
+		Description: "Elevenlabs API",
+		Parse:       elParse,
+		Fn: []Fn{
+			{Name: "voices", Call: elVoices, Description: "Return registered voices"},
+			{Name: "voice", Call: elVoice, Description: "Return one voice", MinArgs: 1, MaxArgs: 1, Syntax: "<voice-id>"},
+			{Name: "settings", Call: elGetVoiceSettings, Description: "Return voice settings, or default settings", MaxArgs: 1, Syntax: "(<voice-id>)"},
+			{Name: "set", Call: elSetVoiceSettings, Description: "Set voice settings from -stability, -similarity-boost and -use-speaker-boost flags", MinArgs: 1, MaxArgs: 1, Syntax: "<voice-id>"},
+			{Name: "say", Call: elTextToSpeech, Description: "Text to speech", MinArgs: 2, Syntax: "<voice-id> <text>..."},
+		},
+	})
+}
+
+func elParse(flags *Flags, opts ...client.ClientOpt) error {
+	// Set defaults
+	if typ := flags.GetOutExt(); typ != "" {
+		elExt = strings.ToLower(flags.GetOutExt())
+	}
+
+	// Create the client
+	apiKey := flags.GetString("elevenlabs-api-key")
+	if apiKey == "" {
+		return fmt.Errorf("missing -elevenlabs-api-key flag")
+	} else if client, err := elevenlabs.New(apiKey, opts...); err != nil {
+		return err
+	} else {
+		elClient = client
+	}
+
+	// Get the bit rate and sample rate
+	if bitrate, err := flags.GetValue("bitrate"); err == nil {
+		if bitrate_, ok := bitrate.(uint64); ok && bitrate_ > 0 {
+			elBitrate = bitrate_
+		}
+	}
+	if samplerate, err := flags.GetValue("samplerate"); err == nil {
+		if samplerate_, ok := samplerate.(uint64); ok && samplerate_ > 0 {
+			elSamplerate = samplerate_
+		}
+	}
+
+	// Return success
+	return nil
+}
+
+/////////////////////////////////////////////////////////////////////
+// API CALL FUNCTIONS
+
+func elVoices(ctx context.Context, w *tablewriter.Writer, args []string) error {
+	voices, err := elClient.Voices()
+	if err != nil {
+		return err
+	}
+	return w.Write(voices)
+}
+
+func elVoice(ctx context.Context, w *tablewriter.Writer, args []string) error {
+	if voice, err := elVoiceId(args[0]); err != nil {
+		return err
+	} else if voice, err := elClient.Voice(voice); err != nil {
+		return err
+	} else {
+		return w.Write(voice)
+	}
+}
+
+func elGetVoiceSettings(ctx context.Context, w *tablewriter.Writer, args []string) error {
+	var voice string
+	if len(args) > 0 {
+		if v, err := elVoiceId(args[0]); err != nil {
+			return err
+		} else {
+			voice = v
+		}
+	}
+	if voice, err := elClient.VoiceSettings(voice); err != nil {
+		return err
+	} else {
+		return w.Write(voice)
+	}
+}
+
+func elSetVoiceSettings(ctx context.Context, w *tablewriter.Writer, args []string) error {
+	var voice string
+	if len(args) > 0 {
+		if v, err := elVoiceId(args[0]); err != nil {
+			return err
+		} else {
+			voice = v
+		}
+	}
+
+	// Get voice settings
+	settings, err := elClient.VoiceSettings(voice)
+	if err != nil {
+		return err
+	}
+
+	// TODO: Modify settings
+	fmt.Println("TODO: elSetVoiceSettings: Modify settings")
+
+	// Set voice settings
+	if err := elClient.SetVoiceSettings(voice, settings); err != nil {
+		return err
+	} else {
+		return w.Write(settings)
+	}
+}
+
+func elTextToSpeech(ctx context.Context, w *tablewriter.Writer, args []string) error {
+	// The voice to use
+	voice, err := elVoiceId(args[0])
+	if err != nil {
+		return err
+	}
+
+	// Output format
+	opts := []elevenlabs.Opt{}
+	if format := elOutputFormat(); format != nil {
+		opts = append(opts, format)
+	} else {
+		return ErrBadParameter.Withf("invalid output format %q", elExt)
+	}
+
+	// The text to speak
+	text := strings.Join(args[1:], " ")
+
+	// If wav, then wrap in a header
+	if elExt == "wav" {
+		// Create the writer
+		writer := NewAudioWriter(w.Output().(io.WriteSeeker), int(elSamplerate), 1)
+		defer writer.Close()
+
+		// Read the data
+		if n, err := elClient.TextToSpeech(writer, voice, text, opts...); err != nil {
+			return err
+		} else {
+			elClient.Debugf("elTextToSpeech: generated %v bytes of PCM data", n)
+		}
+	} else if _, err := elClient.TextToSpeech(w.Output(), voice, text, opts...); err != nil {
+		return err
+	}
+
+	// Return success
+	return nil
+}
+
+/////////////////////////////////////////////////////////////////////
+// PRIVATE METHODS
+
+func elVoiceId(q string) (string, error) {
+	if reVoiceId.MatchString(q) {
+		return q, nil
+	} else if voices, err := elClient.Voices(); err != nil {
+		return "", err
+	} else {
+		for _, v := range voices {
+			if strings.EqualFold(v.Name, q) || v.Id == q {
+				return v.Id, nil
+			}
+		}
+	}
+	return "", ErrNotFound.Withf("%q", q)
+}
+
+func elOutputFormat() elevenlabs.Opt {
+	switch elExt {
+	case "mp3":
+		return elevenlabs.OptFormatMP3(uint(elBitrate), uint(elSamplerate))
+	case "wav":
+		return elevenlabs.OptFormatPCM(uint(elSamplerate))
+	case "ulaw":
+		return elevenlabs.OptFormatULAW()
+	}
+	return nil
+}
+
+/////////////////////////////////////////////////////////////////////
+// AUDIO WRITER
+
+type audioWriter struct {
+	enc *wav.Encoder
+	buf *bytes.Buffer
+	pcm *audio.IntBuffer
+}
+
+func NewAudioWriter(w io.WriteSeeker, sampleRate, channels int) *audioWriter {
+	this := new(audioWriter)
+
+	// Create a WAV encoder
+	this.enc = wav.NewEncoder(w, sampleRate, 16, channels, 1)
+	if this.enc == nil {
+		return nil
+	}
+
+	// Create a buffer for the incoming byte data
+	this.buf = bytes.NewBuffer(nil)
+
+	// Make a PCM buffer with a capacity of 4096 samples
+	this.pcm = &audio.IntBuffer{
+		Format: &audio.Format{
+			SampleRate:  this.enc.SampleRate,
+			NumChannels: this.enc.NumChans,
+		},
+		SourceBitDepth: this.enc.BitDepth,
+		Data:           make([]int, 0, 4096),
+	}
+
+	// Return the writer
+	return this
+}
+
+func (a *audioWriter) Write(data []byte) (int, error) {
+	// Write the data to the buffer
+	if n, err := a.buf.Write(data); err != nil {
+		return 0, err
+	} else if err := a.Flush(); err != nil {
+		return 0, err
+	} else {
+		return n, nil
+	}
+}
+
+func (a *audioWriter) Flush() error {
+	var n int
+	var sample [2]byte
+
+	// Read data until we have a full PCM buffer
+	for {
+		if a.buf.Len() < len(sample) {
+			break
+		} else if n, err := a.buf.Read(sample[:]); err != nil {
+			return err
+		} else if n != len(sample) {
+			return ErrInternalAppError.With("short read")
+		}
+
+		// Append the sample data - Little Endian
+		a.pcm.Data = append(a.pcm.Data, int(int16(sample[0])|int16(sample[1])<<8))
+		n += 2
+	}
+
+	// Write the PCM data
+	if n > 0 {
+		if err := a.enc.Write(a.pcm); err != nil {
+			return err
+		}
+	}
+
+	// Reset the PCM data
+	a.pcm.Data = a.pcm.Data[:0]
+
+	// Return success
+	return nil
+}
+
+func (a *audioWriter) Close() error {
+	if err := a.Flush(); err != nil {
+		return err
+	}
+	return a.enc.Close()
+}