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Copy pathroot.go
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303 lines (270 loc) · 8.85 KB
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package cmd
import (
"fmt"
"io"
"os"
"path/filepath"
"strings"
"unicode/utf8"
"github.com/neosapience/cast/internal/client"
"github.com/spf13/cobra"
"github.com/spf13/viper"
)
var rootCmd = &cobra.Command{
Use: "cast [text]",
Short: "Typecast TTS CLI",
Args: cobra.MaximumNArgs(1),
SilenceErrors: true,
SilenceUsage: true,
RunE: func(cmd *cobra.Command, args []string) error {
var text string
if len(args) == 0 {
stat, _ := os.Stdin.Stat()
if (stat.Mode() & os.ModeCharDevice) == 0 {
data, err := io.ReadAll(os.Stdin)
if err != nil {
return fmt.Errorf("failed to read stdin: %w", err)
}
text = strings.TrimSpace(string(data))
if text == "" {
return fmt.Errorf("no text provided")
}
} else {
return cmd.Help()
}
} else {
text = args[0]
}
outFile, _ := cmd.Flags().GetString("out")
// Infer format from output file extension when format is not set anywhere
// (flag, env var, or config file).
if outFile != "" && viper.GetString("format") == "" {
if ext := strings.ToLower(filepath.Ext(outFile)); ext == ".mp3" || ext == ".wav" {
viper.Set("format", ext[1:])
}
}
req, err := buildTTSRequest(cmd, text)
if err != nil {
return err
}
format := viper.GetString("format")
baseURL := viper.GetString("base_url")
var c *client.Client
if baseURL != "" {
c = client.NewWithBaseURL(viper.GetString("api_key"), baseURL)
} else {
c = client.New(viper.GetString("api_key"))
}
stream := viper.GetBool("stream")
if stream {
fmt.Fprintln(os.Stderr, "Streaming...")
if outFile != "" {
f, err := os.Create(outFile)
if err != nil {
return fmt.Errorf("failed to create output file: %w", err)
}
streamErr := c.TextToSpeechStream(req, func(chunk []byte) error {
_, err := f.Write(chunk)
return err
})
if closeErr := f.Close(); closeErr != nil && streamErr == nil {
streamErr = fmt.Errorf("failed to close output file: %w", closeErr)
}
if streamErr != nil {
os.Remove(outFile)
return streamErr
}
fmt.Fprintf(os.Stderr, "saved to %s\n", outFile)
return nil
}
// No output file: stream to temp file, then play
tmp, err := os.CreateTemp("", "cast-stream-*."+format)
if err != nil {
return err
}
tmpName := tmp.Name()
defer os.Remove(tmpName)
if err := c.TextToSpeechStream(req, func(chunk []byte) error {
_, err := tmp.Write(chunk)
return err
}); err != nil {
tmp.Close()
return err
}
tmp.Close()
if format == "" {
format = "wav"
}
return playFile(tmpName, format)
}
audio, err := c.TextToSpeech(req)
if err != nil {
return err
}
if outFile != "" {
return saveAudio(audio, outFile)
}
return playAudio(audio, format)
},
}
func buildTTSRequest(cmd *cobra.Command, text string) (client.TTSRequest, error) {
runeCount := utf8.RuneCountInString(text)
if runeCount == 0 || runeCount > 2000 {
return client.TTSRequest{}, fmt.Errorf("text must be between 1 and 2000 characters, got %d", runeCount)
}
flags := cmd.Flags()
voiceID := viper.GetString("voice_id")
model := viper.GetString("model")
language := viper.GetString("language")
emotion := viper.GetString("emotion")
emotionPreset := viper.GetString("emotion_preset")
emotionIntensity := viper.GetFloat64("emotion_intensity")
prevText := viper.GetString("prev_text")
nextText := viper.GetString("next_text")
volume := viper.GetInt("volume")
pitch := viper.GetInt("pitch")
tempo := viper.GetFloat64("tempo")
format := viper.GetString("format")
seed := viper.GetInt("seed")
// Validate all params before producing any side effects (e.g. warning messages).
if emotion != "" && emotion != "smart" && emotion != "preset" {
return client.TTSRequest{}, fmt.Errorf("unknown emotion type %q, use 'smart' or 'preset'", emotion)
}
if emotion == "smart" && model != "ssfm-v30" {
return client.TTSRequest{}, fmt.Errorf("emotion 'smart' is only supported with ssfm-v30")
}
if (prevText != "" || nextText != "") && emotion != "smart" {
return client.TTSRequest{}, fmt.Errorf("--prev-text and --next-text require --emotion smart")
}
if (emotionPreset != "" || flags.Changed("emotion-intensity")) && emotion != "preset" {
return client.TTSRequest{}, fmt.Errorf("--emotion-preset and --emotion-intensity require --emotion preset")
}
if emotionIntensity >= 0 {
if emotionIntensity < minEmotionIntensity || emotionIntensity > maxEmotionIntensity {
return client.TTSRequest{}, fmt.Errorf("emotion-intensity must be between %.1f and %.1f, got %g", minEmotionIntensity, maxEmotionIntensity, emotionIntensity)
}
}
if volume >= 0 {
if volume < minVolume || volume > maxVolume {
return client.TTSRequest{}, fmt.Errorf("volume must be between %d and %d, got %d", minVolume, maxVolume, volume)
}
}
// pitch uses 0 as both sentinel and valid value; pitch=0 (no change) is
// semantically equivalent to omitting it, so this does not cause data loss.
if flags.Changed("pitch") || pitch != 0 {
if pitch < minPitch || pitch > maxPitch {
return client.TTSRequest{}, fmt.Errorf("pitch must be between %d and %d, got %d", minPitch, maxPitch, pitch)
}
}
if tempo >= 0 {
if tempo < minTempo || tempo > maxTempo {
return client.TTSRequest{}, fmt.Errorf("tempo must be between %.1f and %.1f, got %g", minTempo, maxTempo, tempo)
}
}
if voiceID == "" {
voiceID = defaultVoiceID
fmt.Fprintf(os.Stderr, "voice ID not set, using default: %s\n", defaultVoiceID)
}
req := client.TTSRequest{
VoiceID: voiceID,
Text: text,
Model: model,
Language: language,
}
if emotion != "" {
prompt := &client.TTSPrompt{}
switch emotion {
case "smart":
prompt.EmotionType = "smart"
prompt.PreviousText = prevText
prompt.NextText = nextText
case "preset":
prompt.EmotionType = "preset"
prompt.EmotionPreset = emotionPreset
if emotionIntensity >= 0 {
prompt.EmotionIntensity = &emotionIntensity
}
}
req.Prompt = prompt
}
out := &client.TTSOutput{}
hasOutput := false
if volume >= 0 {
out.Volume = &volume
hasOutput = true
}
// See validation comment above regarding pitch sentinel.
if flags.Changed("pitch") || pitch != 0 {
out.AudioPitch = &pitch
hasOutput = true
}
if tempo >= 0 {
out.AudioTempo = &tempo
hasOutput = true
}
if format != "" {
out.AudioFormat = format
hasOutput = true
}
if hasOutput {
req.Output = out
}
if seed >= 0 {
req.Seed = &seed
}
return req, nil
}
func Execute() {
if err := rootCmd.Execute(); err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
}
func init() {
cobra.OnInitialize(initConfig)
rootCmd.PersistentFlags().String("api-key", "", "API key (or TYPECAST_API_KEY)")
viper.BindPFlag("api_key", rootCmd.PersistentFlags().Lookup("api-key"))
rootCmd.PersistentFlags().String("base-url", "", "API base URL (or TYPECAST_BASE_URL, default: https://api.typecast.ai)")
viper.BindPFlag("base_url", rootCmd.PersistentFlags().Lookup("base-url"))
f := rootCmd.Flags()
f.String("voice-id", "", "Voice ID (or TYPECAST_VOICE_ID)")
viper.BindPFlag("voice_id", f.Lookup("voice-id"))
f.String("model", defaultModel, "Model (ssfm-v30, ssfm-v21)")
viper.BindPFlag("model", f.Lookup("model"))
f.String("language", "", "Language code (ISO 639-3, auto-detected if omitted)")
viper.BindPFlag("language", f.Lookup("language"))
f.String("out", "", "Save to file instead of playing")
f.String("emotion", "", "Emotion type: smart (ssfm-v30 only), preset")
viper.BindPFlag("emotion", f.Lookup("emotion"))
f.String("emotion-preset", "", "Emotion preset (normal, happy, sad, angry, whisper, toneup, tonedown — see voices for availability)")
viper.BindPFlag("emotion_preset", f.Lookup("emotion-preset"))
f.Float64("emotion-intensity", -1, "Emotion intensity (0.0–2.0, default 1.0)")
viper.BindPFlag("emotion_intensity", f.Lookup("emotion-intensity"))
f.String("prev-text", "", "Previous text for context")
viper.BindPFlag("prev_text", f.Lookup("prev-text"))
f.String("next-text", "", "Next text for context")
viper.BindPFlag("next_text", f.Lookup("next-text"))
f.Int("volume", -1, "Volume (0-200, default 100)")
viper.BindPFlag("volume", f.Lookup("volume"))
f.Int("pitch", 0, "Pitch in semitones (-12 to +12, default 0)")
viper.BindPFlag("pitch", f.Lookup("pitch"))
f.Float64("tempo", -1, "Tempo multiplier (0.5-2.0, default 1.0)")
viper.BindPFlag("tempo", f.Lookup("tempo"))
f.String("format", "", "Output format (wav, mp3)")
viper.BindPFlag("format", f.Lookup("format"))
f.Int("seed", -1, "Random seed for reproducible output")
viper.BindPFlag("seed", f.Lookup("seed"))
f.Bool("stream", false, "Stream audio chunks in real-time")
viper.BindPFlag("stream", f.Lookup("stream"))
}
func initConfig() {
viper.SetEnvPrefix("TYPECAST")
viper.AutomaticEnv()
home, err := os.UserHomeDir()
if err == nil {
viper.AddConfigPath(home + "/.typecast")
viper.SetConfigName("config")
viper.SetConfigType("yaml")
viper.ReadInConfig()
}
}