Merge pull request #13 from mateusnobre/feature/elevenlabs-scribe-support

feat: Add Eleven Labs Scribe API support

README.md

@@ -7,7 +7,7 @@ Press a toggle key, speak, and get instant text input. Built natively for Waylan
 - **Toggle workflow**: Press once to start recording, press again to stop and inject text
 - **Wayland native**: Purpose-built for Wayland compositors - no legacy X11 dependencies or hacky workarounds
 - **Real-time feedback**: Desktop notifications for recording states and transcription status
-- **Multiple transcription backends**: OpenAI Whisper and Groq (planned: whisper.cpp for local processing, gemini, and more)
+- **Multiple transcription backends**: OpenAI Whisper, Groq, Mistral Voxtral, and Eleven Labs Scribe (99 languages, excellent accuracy)
 - **Smart text injection**: Clipboard save/restore with direct typing fallback
 - **Daemon architecture**: Lightweight control plane with efficient pipeline management
 
@@ -62,7 +62,7 @@ export PATH="$HOME/.local/bin:$PATH"
 
 - **Wayland desktop** (Hyprland, Niri, GNOME, KDE, etc.)
 - **PipeWire audio system** with tools
-- **API key for transcription**: OpenAI API key or Groq API key (Groq offers faster processing and free tier)
+- **API key for transcription**: OpenAI, Groq, Mistral, or Eleven Labs API key (check each provider's pricing)
 
 **System packages** (automatically installed with AUR package):
 
@@ -96,7 +96,7 @@ After installing via AUR:
 ```bash
 hyprvoice configure
 ```
-This wizard will guide you through setting up your OpenAI API key, audio preferences, and other settings.
+This wizard will guide you through setting up your transcription provider, API key, audio preferences, and other settings.
 
 2. **Enable and start the service:**
 ```bash

cmd/hyprvoice/main.go

@@ -166,7 +166,8 @@ func runInteractiveConfig() error {
 		fmt.Println("  2. groq-transcription   - Groq Whisper API (fast transcription)")
 		fmt.Println("  3. groq-translation     - Groq Whisper API (translate to English)")
 		fmt.Println("  4. mistral-transcription - Mistral Voxtral API (excellent for European languages)")
-		fmt.Printf("Provider [1-4] (current: %s): ", cfg.Transcription.Provider)
+		fmt.Println("  5. elevenlabs           - ElevenLabs Scribe API (99 languages, excellent accuracy)")
+		fmt.Printf("Provider [1-5] (current: %s): ", cfg.Transcription.Provider)
 		if !scanner.Scan() {
 			break
 		}
@@ -183,10 +184,12 @@ func runInteractiveConfig() error {
 			cfg.Transcription.Provider = "groq-translation"
 		case "4":
 			cfg.Transcription.Provider = "mistral-transcription"
-		case "openai", "groq-transcription", "groq-translation", "mistral-transcription":
+		case "5":
+			cfg.Transcription.Provider = "elevenlabs"
+		case "openai", "groq-transcription", "groq-translation", "mistral-transcription", "elevenlabs":
 			cfg.Transcription.Provider = input
 		default:
-			fmt.Println("❌ Error: invalid provider. Please enter 1-4 or provider name.")
+			fmt.Println("❌ Error: invalid provider. Please enter 1-5 or provider name.")
 			fmt.Println()
 			continue
 		}
@@ -275,6 +278,38 @@ func runInteractiveConfig() error {
 			}
 			break
 		}
+	case "elevenlabs":
+		for {
+			fmt.Println("\nElevenLabs Scribe Model:")
+			fmt.Println("  Language Support:")
+			fmt.Println("    scribe_v1: 99 languages (96.7% accuracy for English, ≤5% WER for Portuguese)")
+			fmt.Println("    scribe_v2: 90 languages (real-time optimized, lower latency)")
+			fmt.Println()
+			fmt.Println("  Available Models:")
+			fmt.Println("    1. scribe_v1  - Best accuracy, full timestamps (recommended)")
+			fmt.Println("    2. scribe_v2  - Real-time streaming, lower latency")
+			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 = "scribe_v1"
+			case "2":
+				cfg.Transcription.Model = "scribe_v2"
+			case "scribe_v1", "scribe_v2":
+				cfg.Transcription.Model = input
+			case "":
+				if cfg.Transcription.Model == "" {
+					cfg.Transcription.Model = "scribe_v1"
+				}
+			default:
+				fmt.Println("❌ Error: invalid model. Please enter 1, 2 or model name.")
+				continue
+			}
+			break
+		}
 	}
 
 	// API Key (provider-aware)
@@ -284,6 +319,8 @@ func runInteractiveConfig() error {
 		envVarName = "OPENAI_API_KEY"
 	case "mistral-transcription":
 		envVarName = "MISTRAL_API_KEY"
+	case "elevenlabs":
+		envVarName = "ELEVENLABS_API_KEY"
 	default:
 		envVarName = "GROQ_API_KEY"
 	}
@@ -299,6 +336,13 @@ func runInteractiveConfig() error {
 	if cfg.Transcription.Provider == "groq-translation" {
 		fmt.Printf("\nSource language hint (empty for auto-detect, current: %s): ", cfg.Transcription.Language)
 		fmt.Println("\n  Note: Translation always outputs English. Language hints at source audio language.")
+	} else if cfg.Transcription.Provider == "elevenlabs" {
+		fmt.Println("\nLanguage Performance:")
+		fmt.Println("  Excellent (≤5% WER): English, Portuguese, +25 languages")
+		fmt.Println("  High (5-10% WER): French, German, Spanish, Italian, etc.")
+		fmt.Println("  Good (10-20% WER): Most supported languages")
+		fmt.Println("  Leave empty for auto-detection (recommended)")
+		fmt.Printf("Language (current: %s): ", cfg.Transcription.Language)
 	} else {
 		fmt.Printf("\nLanguage (empty for auto-detect, current: %s): ", cfg.Transcription.Language)
 	}
@@ -608,10 +652,10 @@ func saveConfig(cfg *config.Config) error {
 
 # Speech Transcription Configuration
 [transcription]
-  provider = "%s"          # Transcription service: "openai", "groq-transcription", "groq-translation", or "mistral-transcription"
+  provider = "%s"          # Transcription service: "openai", "groq-transcription", "groq-translation", "mistral-transcription", or "elevenlabs"
-  api_key = "%s"                 # API key (or set OPENAI_API_KEY/GROQ_API_KEY/MISTRAL_API_KEY environment variable)
+  api_key = "%s"                 # API key (or set OPENAI_API_KEY/GROQ_API_KEY/MISTRAL_API_KEY/ELEVENLABS_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", Mistral="voxtral-mini-latest"
+  model = "%s"          # Model: OpenAI="whisper-1", Groq="whisper-large-v3", Mistral="voxtral-mini-latest", ElevenLabs="scribe_v1" or "scribe_v2"
 
 # Text Injection Configuration
 [injection]
@@ -635,6 +679,8 @@ func saveConfig(cfg *config.Config) error {
 #     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
+# - "elevenlabs": ElevenLabs Scribe API (excellent accuracy, 99 languages, requires ELEVENLABS_API_KEY)
+#     Models: scribe_v1 (99 languages, best accuracy) or scribe_v2 (90 languages, real-time)
 #
 # 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

@@ -127,6 +127,8 @@ func (c *Config) ToTranscriberConfig() transcriber.Config {
 			config.APIKey = os.Getenv("GROQ_API_KEY")
 		case "mistral-transcription":
 			config.APIKey = os.Getenv("MISTRAL_API_KEY")
+		case "elevenlabs":
+			config.APIKey = os.Getenv("ELEVENLABS_API_KEY")
 		}
 	}
 
@@ -243,8 +245,28 @@ func (c *Config) Validate() error {
 			return fmt.Errorf("invalid model for mistral-transcription: %s (must be voxtral-mini-latest or voxtral-mini-2507)", c.Transcription.Model)
 		}
 
+	case "elevenlabs":
+		apiKey := c.Transcription.APIKey
+		if apiKey == "" {
+			apiKey = os.Getenv("ELEVENLABS_API_KEY")
+		}
+		if apiKey == "" {
+			return fmt.Errorf("ElevenLabs API key required: not found in config (transcription.api_key) or environment variable (ELEVENLABS_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', 'pt', 'es')", c.Transcription.Language)
+		}
+
+		// Validate Eleven Labs model
+		validModels := map[string]bool{"scribe_v1": true, "scribe_v2": true}
+		if c.Transcription.Model != "" && !validModels[c.Transcription.Model] {
+			return fmt.Errorf("invalid model for elevenlabs: %s (must be scribe_v1 or scribe_v2)", c.Transcription.Model)
+		}
+
 	default:
-		return fmt.Errorf("unsupported transcription.provider: %s (must be openai, groq-transcription, groq-translation, or mistral-transcription)", c.Transcription.Provider)
+		return fmt.Errorf("unsupported transcription.provider: %s (must be openai, groq-transcription, groq-translation, mistral-transcription, or elevenlabs)", c.Transcription.Provider)
 	}
 
 	if c.Transcription.Model == "" {
@@ -412,10 +434,10 @@ func SaveDefaultConfig() error {
 
 # Speech Transcription Configuration
 [transcription]
-  provider = "openai"          # Transcription service: "openai", "groq-transcription", "groq-translation", or "mistral-transcription"
+  provider = "openai"          # Transcription service: "openai", "groq-transcription", "groq-translation", "mistral-transcription", or "elevenlabs"
-  api_key = ""                 # API key (or set OPENAI_API_KEY/GROQ_API_KEY/MISTRAL_API_KEY environment variable)
+  api_key = ""                 # API key (or set OPENAI_API_KEY/GROQ_API_KEY/MISTRAL_API_KEY/ELEVENLABS_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", Mistral="voxtral-mini-latest"
+  model = "whisper-1"          # Model: OpenAI="whisper-1", Groq="whisper-large-v3", Mistral="voxtral-mini-latest", ElevenLabs="scribe_v1"
 
 # Text Injection Configuration
 [injection]
@@ -479,6 +501,8 @@ func SaveDefaultConfig() error {
 #     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
+# - "elevenlabs": ElevenLabs Scribe API (excellent accuracy, 99 languages, requires ELEVENLABS_API_KEY)
+#     Models: scribe_v1 (99 languages, best accuracy) or scribe_v2 (90 languages, real-time)
 #
 # 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_elevenlabs.go

@@ -0,0 +1,108 @@
+package transcriber
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"log"
+	"mime/multipart"
+	"net/http"
+	"time"
+)
+
+// ElevenLabsAdapter implements TranscriptionAdapter for ElevenLabs Scribe API
+type ElevenLabsAdapter struct {
+	client *http.Client
+	config Config
+}
+
+// ElevenLabsResponse represents the API response
+type ElevenLabsResponse struct {
+	Text string `json:"text"`
+}
+
+// NewElevenLabsAdapter creates a new ElevenLabs adapter
+func NewElevenLabsAdapter(config Config) *ElevenLabsAdapter {
+	return &ElevenLabsAdapter{
+		client: &http.Client{Timeout: 30 * time.Second},
+		config: config,
+	}
+}
+
+// Transcribe sends audio to ElevenLabs API for transcription
+func (a *ElevenLabsAdapter) 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 multipart form body
+	var body bytes.Buffer
+	writer := multipart.NewWriter(&body)
+
+	// Add audio file
+	part, err := writer.CreateFormFile("file", "audio.wav")
+	if err != nil {
+		return "", fmt.Errorf("create form file: %w", err)
+	}
+	if _, err := io.Copy(part, bytes.NewReader(wavData)); err != nil {
+		return "", fmt.Errorf("copy audio data: %w", err)
+	}
+
+	// Add model_id
+	if err := writer.WriteField("model_id", a.config.Model); err != nil {
+		return "", fmt.Errorf("write model_id: %w", err)
+	}
+
+	// Add language_code if specified
+	if a.config.Language != "" {
+		if err := writer.WriteField("language_code", a.config.Language); err != nil {
+			return "", fmt.Errorf("write language_code: %w", err)
+		}
+	}
+
+	if err := writer.Close(); err != nil {
+		return "", fmt.Errorf("close writer: %w", err)
+	}
+
+	// Create HTTP request
+	url := "https://api.elevenlabs.io/v1/speech-to-text"
+	req, err := http.NewRequestWithContext(ctx, "POST", url, &body)
+	if err != nil {
+		return "", fmt.Errorf("create request: %w", err)
+	}
+
+	req.Header.Set("Content-Type", writer.FormDataContentType())
+	req.Header.Set("xi-api-key", a.config.APIKey)
+
+	start := time.Now()
+	resp, err := a.client.Do(req)
+	duration := time.Since(start)
+
+	if err != nil {
+		log.Printf("elevenlabs-adapter: API call failed after %v: %v", duration, err)
+		return "", fmt.Errorf("elevenlabs request: %w", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		bodyBytes, _ := io.ReadAll(resp.Body)
+		log.Printf("elevenlabs-adapter: API returned status %d: %s", resp.StatusCode, string(bodyBytes))
+		return "", fmt.Errorf("elevenlabs API status %d: %s", resp.StatusCode, string(bodyBytes))
+	}
+
+	var result ElevenLabsResponse
+	if err := json.NewDecoder(resp.Body).Decode(&result); err != nil {
+		return "", fmt.Errorf("decode response: %w", err)
+	}
+
+	log.Printf("elevenlabs-adapter: transcribed %d bytes in %v: %q", len(audioData), duration, result.Text)
+	return result.Text, nil
+}

internal/transcriber/adapter_elevenlabs_test.go

@@ -0,0 +1,72 @@
+package transcriber
+
+import (
+	"context"
+	"testing"
+)
+
+func TestNewElevenLabsAdapter(t *testing.T) {
+	config := Config{
+		Provider: "elevenlabs",
+		APIKey:   "test-api-key",
+		Language: "en",
+		Model:    "scribe_v1",
+	}
+
+	adapter := NewElevenLabsAdapter(config)
+
+	if adapter == nil {
+		t.Fatalf("NewElevenLabsAdapter() returned nil")
+	}
+
+	if adapter.config.APIKey != "test-api-key" {
+		t.Errorf("APIKey not set correctly, got: %s", adapter.config.APIKey)
+	}
+
+	if adapter.config.Model != "scribe_v1" {
+		t.Errorf("Model not set correctly, got: %s", adapter.config.Model)
+	}
+}
+
+func TestElevenLabsAdapter_Transcribe_EmptyAudio(t *testing.T) {
+	config := Config{
+		Provider: "elevenlabs",
+		APIKey:   "test-key",
+		Model:    "scribe_v1",
+	}
+
+	adapter := NewElevenLabsAdapter(config)
+	ctx := context.Background()
+
+	result, err := adapter.Transcribe(ctx, []byte{})
+
+	if err != nil {
+		t.Errorf("Transcribe() with empty audio should not error, got: %v", err)
+	}
+
+	if result != "" {
+		t.Errorf("Transcribe() with empty audio should return empty string, got: %s", result)
+	}
+}
+
+func TestElevenLabsAdapter_Transcribe_ValidAudio(t *testing.T) {
+	// This test will require mocking the HTTP client
+	// For now, we test the structure exists
+	config := Config{
+		Provider: "elevenlabs",
+		APIKey:   "test-key",
+		Language: "en",
+		Model:    "scribe_v1",
+	}
+
+	adapter := NewElevenLabsAdapter(config)
+
+	if adapter == nil {
+		t.Fatal("NewElevenLabsAdapter() returned nil")
+	}
+
+	// Test that adapter has a client
+	if adapter.client == nil {
+		t.Error("adapter.client is nil")
+	}
+}

internal/transcriber/transcriber.go

@@ -57,6 +57,12 @@ func NewTranscriber(config Config) (Transcriber, error) {
 		}
 		adapter = NewMistralAdapter(config)
 
+	case "elevenlabs":
+		if config.APIKey == "" {
+			return nil, fmt.Errorf("ElevenLabs API key required")
+		}
+		adapter = NewElevenLabsAdapter(config)
+
 	default:
 		return nil, fmt.Errorf("unsupported provider: %s", config.Provider)
 	}

internal/transcriber/transcriber_test.go

@@ -95,6 +95,36 @@ func TestNewTranscriber(t *testing.T) {
 			},
 			wantErr: true,
 		},
+		{
+			name: "valid elevenlabs config with scribe_v1",
+			config: Config{
+				Provider: "elevenlabs",
+				APIKey:   "test-key",
+				Language: "en",
+				Model:    "scribe_v1",
+			},
+			wantErr: false,
+		},
+		{
+			name: "valid elevenlabs config with scribe_v2",
+			config: Config{
+				Provider: "elevenlabs",
+				APIKey:   "test-key",
+				Language: "pt",
+				Model:    "scribe_v2",
+			},
+			wantErr: false,
+		},
+		{
+			name: "elevenlabs config without api key",
+			config: Config{
+				Provider: "elevenlabs",
+				APIKey:   "",
+				Language: "en",
+				Model:    "scribe_v1",
+			},
+			wantErr: true,
+		},
 		{
 			name: "unsupported provider",
 			config: Config{