Merge pull request #11 from LeonardoTrapani/mistral

add mistra voxtral

cmd/hyprvoice/main.go

@@ -132,7 +132,7 @@ func configureCmd() *cobra.Command {
 		Short: "Interactive configuration setup",
 		Long: `Interactive configuration wizard for hyprvoice.
 This will guide you through setting up:
-- Transcription provider (OpenAI or Groq)
+- Transcription provider (OpenAI, Groq, or Mistral)
 - API keys and model selection
 - Audio and text injection preferences
 - Notification settings`,
@@ -165,7 +165,8 @@ func runInteractiveConfig() error {
 		fmt.Println("  1. openai               - OpenAI Whisper API (cloud-based)")
 		fmt.Println("  2. groq-transcription   - Groq Whisper API (fast transcription)")
 		fmt.Println("  3. groq-translation     - Groq Whisper API (translate to English)")
-		fmt.Printf("Provider [1-3] (current: %s): ", cfg.Transcription.Provider)
+		fmt.Println("  4. mistral-transcription - Mistral Voxtral API (excellent for European languages)")
+		fmt.Printf("Provider [1-4] (current: %s): ", cfg.Transcription.Provider)
 		if !scanner.Scan() {
 			break
 		}
@@ -180,10 +181,12 @@ func runInteractiveConfig() error {
 			cfg.Transcription.Provider = "groq-transcription"
 		case "3":
 			cfg.Transcription.Provider = "groq-translation"
-		case "openai", "groq-transcription", "groq-translation":
+		case "4":
+			cfg.Transcription.Provider = "mistral-transcription"
+		case "openai", "groq-transcription", "groq-translation", "mistral-transcription":
 			cfg.Transcription.Provider = input
 		default:
-			fmt.Println("❌ Error: invalid provider. Please enter 1, 2, 3 or provider name.")
+			fmt.Println("❌ Error: invalid provider. Please enter 1-4 or provider name.")
 			fmt.Println()
 			continue
 		}
@@ -245,13 +248,43 @@ func runInteractiveConfig() error {
 			}
 			fmt.Println("❌ Error: only whisper-large-v3 is supported for translation.")
 		}
+	case "mistral-transcription":
+		for {
+			fmt.Println("\nMistral Voxtral Model:")
+			fmt.Println("  1. voxtral-mini-latest - Recommended (latest version)")
+			fmt.Println("  2. voxtral-mini-2507   - Pinned version")
+			fmt.Printf("Model [1-2] (current: %s): ", cfg.Transcription.Model)
+			if !scanner.Scan() {
+				break
+			}
+			input := strings.TrimSpace(scanner.Text())
+			switch input {
+			case "1":
+				cfg.Transcription.Model = "voxtral-mini-latest"
+			case "2":
+				cfg.Transcription.Model = "voxtral-mini-2507"
+			case "voxtral-mini-latest", "voxtral-mini-2507":
+				cfg.Transcription.Model = input
+			case "":
+				if cfg.Transcription.Model == "" || !strings.HasPrefix(cfg.Transcription.Model, "voxtral") {
+					cfg.Transcription.Model = "voxtral-mini-latest"
+				}
+			default:
+				fmt.Println("❌ Error: invalid model. Please enter 1, 2 or model name.")
+				continue
+			}
+			break
+		}
 	}
 
 	// API Key (provider-aware)
 	var envVarName string
-	if cfg.Transcription.Provider == "openai" {
+	switch cfg.Transcription.Provider {
+	case "openai":
 		envVarName = "OPENAI_API_KEY"
-	} else {
+	case "mistral-transcription":
+		envVarName = "MISTRAL_API_KEY"
+	default:
 		envVarName = "GROQ_API_KEY"
 	}
 	fmt.Printf("\nAPI Key (current: %s, leave empty to use %s env var): ", maskAPIKey(cfg.Transcription.APIKey), envVarName)
@@ -575,10 +608,10 @@ func saveConfig(cfg *config.Config) error {
 
 # Speech Transcription Configuration
 [transcription]
-  provider = "%s"          # Transcription service: "openai", "groq-transcription", or "groq-translation"
-  api_key = "%s"                 # API key (or set OPENAI_API_KEY/GROQ_API_KEY environment variable)
+  provider = "%s"          # Transcription service: "openai", "groq-transcription", "groq-translation", or "mistral-transcription"
+  api_key = "%s"                 # API key (or set OPENAI_API_KEY/GROQ_API_KEY/MISTRAL_API_KEY environment variable)
   language = "%s"                # Language code (empty for auto-detect, "en", "it", "es", "fr", etc.)
-  model = "%s"          # Model: OpenAI="whisper-1", Groq="whisper-large-v3" or "whisper-large-v3-turbo"
+  model = "%s"          # Model: OpenAI="whisper-1", Groq="whisper-large-v3", Mistral="voxtral-mini-latest"
 
 # Text Injection Configuration
 [injection]
@@ -600,6 +633,8 @@ func saveConfig(cfg *config.Config) error {
 #     Models: whisper-large-v3 or whisper-large-v3-turbo
 # - "groq-translation": Groq Whisper API for translation to English (always outputs English text)
 #     Models: whisper-large-v3 only (turbo not supported for translation)
+# - "mistral-transcription": Mistral Voxtral API (excellent for European languages, requires MISTRAL_API_KEY)
+#     Models: voxtral-mini-latest or voxtral-mini-2507
 #
 # Language codes: Use empty string ("") for automatic detection, or specific codes like:
 # "en" (English), "it" (Italian), "es" (Spanish), "fr" (French), "de" (German), etc.

internal/config/config.go

@@ -125,6 +125,8 @@ func (c *Config) ToTranscriberConfig() transcriber.Config {
 			config.APIKey = os.Getenv("OPENAI_API_KEY")
 		case "groq-transcription", "groq-translation":
 			config.APIKey = os.Getenv("GROQ_API_KEY")
+		case "mistral-transcription":
+			config.APIKey = os.Getenv("MISTRAL_API_KEY")
 		}
 	}
 
@@ -221,8 +223,28 @@ func (c *Config) Validate() error {
 			return fmt.Errorf("invalid model for groq-translation: %s (must be whisper-large-v3, turbo version not supported for translation)", c.Transcription.Model)
 		}
 
+	case "mistral-transcription":
+		apiKey := c.Transcription.APIKey
+		if apiKey == "" {
+			apiKey = os.Getenv("MISTRAL_API_KEY")
+		}
+		if apiKey == "" {
+			return fmt.Errorf("Mistral API key required: not found in config (transcription.api_key) or environment variable (MISTRAL_API_KEY)")
+		}
+
+		// Validate language code if provided (empty string means auto-detect)
+		if c.Transcription.Language != "" && !isValidLanguageCode(c.Transcription.Language) {
+			return fmt.Errorf("invalid transcription.language: %s (use empty string for auto-detect or ISO-639-1 codes like 'en', 'es', 'fr')", c.Transcription.Language)
+		}
+
+		// Validate Mistral model
+		validMistralModels := map[string]bool{"voxtral-mini-latest": true, "voxtral-mini-2507": true}
+		if c.Transcription.Model != "" && !validMistralModels[c.Transcription.Model] {
+			return fmt.Errorf("invalid model for mistral-transcription: %s (must be voxtral-mini-latest or voxtral-mini-2507)", c.Transcription.Model)
+		}
+
 	default:
-		return fmt.Errorf("unsupported transcription.provider: %s (must be openai, groq-transcription, or groq-translation)", c.Transcription.Provider)
+		return fmt.Errorf("unsupported transcription.provider: %s (must be openai, groq-transcription, groq-translation, or mistral-transcription)", c.Transcription.Provider)
 	}
 
 	if c.Transcription.Model == "" {
@@ -390,10 +412,10 @@ func SaveDefaultConfig() error {
 
 # Speech Transcription Configuration
 [transcription]
-  provider = "openai"          # Transcription service: "openai", "groq-transcription", or "groq-translation"
-  api_key = ""                 # API key (or set OPENAI_API_KEY/GROQ_API_KEY environment variable)
+  provider = "openai"          # Transcription service: "openai", "groq-transcription", "groq-translation", or "mistral-transcription"
+  api_key = ""                 # API key (or set OPENAI_API_KEY/GROQ_API_KEY/MISTRAL_API_KEY environment variable)
   language = ""                # Language code (empty for auto-detect, "en", "it", "es", "fr", etc.)
-  model = "whisper-1"          # Model: OpenAI="whisper-1", Groq="whisper-large-v3" or "whisper-large-v3-turbo"
+  model = "whisper-1"          # Model: OpenAI="whisper-1", Groq="whisper-large-v3", Mistral="voxtral-mini-latest"
 
 # Text Injection Configuration
 [injection]
@@ -455,6 +477,8 @@ func SaveDefaultConfig() error {
 #     Models: whisper-large-v3 or whisper-large-v3-turbo
 # - "groq-translation": Groq Whisper API for translation to English (always outputs English text)
 #     Models: whisper-large-v3 only (turbo not supported for translation)
+# - "mistral-transcription": Mistral Voxtral API (excellent for European languages, requires MISTRAL_API_KEY)
+#     Models: voxtral-mini-latest or voxtral-mini-2507
 #
 # Language codes: Use empty string ("") for automatic detection, or specific codes like:
 # "en" (English), "it" (Italian), "es" (Spanish), "fr" (French), "de" (German), etc.

internal/transcriber/adapter_mistral.go

@@ -0,0 +1,60 @@
+package transcriber
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"log"
+	"time"
+
+	"github.com/sashabaranov/go-openai"
+)
+
+// MistralAdapter implements TranscriptionAdapter for Mistral Voxtral API
+type MistralAdapter struct {
+	client *openai.Client
+	config Config
+}
+
+func NewMistralAdapter(config Config) *MistralAdapter {
+	clientConfig := openai.DefaultConfig(config.APIKey)
+	clientConfig.BaseURL = "https://api.mistral.ai/v1"
+	client := openai.NewClientWithConfig(clientConfig)
+
+	return &MistralAdapter{
+		client: client,
+		config: config,
+	}
+}
+
+func (a *MistralAdapter) Transcribe(ctx context.Context, audioData []byte) (string, error) {
+	if len(audioData) == 0 {
+		return "", nil
+	}
+
+	// Convert raw PCM to WAV format
+	wavData, err := convertToWAV(audioData)
+	if err != nil {
+		return "", fmt.Errorf("convert to WAV: %w", err)
+	}
+
+	// Create transcription request
+	req := openai.AudioRequest{
+		Model:    a.config.Model,
+		Reader:   bytes.NewReader(wavData),
+		FilePath: "audio.wav",
+		Language: a.config.Language,
+	}
+
+	start := time.Now()
+	resp, err := a.client.CreateTranscription(ctx, req)
+	duration := time.Since(start)
+
+	if err != nil {
+		log.Printf("mistral-adapter: API call failed after %v: %v", duration, err)
+		return "", fmt.Errorf("mistral transcription: %w", err)
+	}
+
+	log.Printf("mistral-adapter: transcribed %d bytes in %v: %q", len(audioData), duration, resp.Text)
+	return resp.Text, nil
+}

internal/transcriber/transcriber.go

@@ -51,6 +51,12 @@ func NewTranscriber(config Config) (Transcriber, error) {
 		}
 		adapter = NewGroqTranslationAdapter(config)
 
+	case "mistral-transcription":
+		if config.APIKey == "" {
+			return nil, fmt.Errorf("Mistral API key required")
+		}
+		adapter = NewMistralAdapter(config)
+
 	default:
 		return nil, fmt.Errorf("unsupported provider: %s", config.Provider)
 	}

internal/transcriber/transcriber_test.go

@@ -75,6 +75,26 @@ func TestNewTranscriber(t *testing.T) {
 			},
 			wantErr: true,
 		},
+		{
+			name: "valid mistral-transcription config",
+			config: Config{
+				Provider: "mistral-transcription",
+				APIKey:   "test-key",
+				Language: "de",
+				Model:    "voxtral-mini-latest",
+			},
+			wantErr: false,
+		},
+		{
+			name: "mistral-transcription config without api key",
+			config: Config{
+				Provider: "mistral-transcription",
+				APIKey:   "",
+				Language: "de",
+				Model:    "voxtral-mini-latest",
+			},
+			wantErr: true,
+		},
 		{
 			name: "unsupported provider",
 			config: Config{