59 lines
1.9 KiB
Go
59 lines
1.9 KiB
Go
package tts
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"io"
|
|
)
|
|
|
|
// Service provides text-to-speech functionality
|
|
type Service interface {
|
|
SynthesizeStream(ctx context.Context, text string) (io.Reader, error)
|
|
Synthesize(ctx context.Context, text string) ([]byte, error)
|
|
GetVisemes(ctx context.Context, text string) ([]VisemeEvent, error)
|
|
}
|
|
|
|
// VisemeEvent represents a viseme (lip shape) event for lip sync
|
|
type VisemeEvent struct {
|
|
Viseme string `json:"viseme"` // e.g., "sil", "aa", "ee", "oh", "ou"
|
|
StartTime float64 `json:"start_time"`
|
|
EndTime float64 `json:"end_time"`
|
|
Phoneme string `json:"phoneme,omitempty"`
|
|
}
|
|
|
|
// MockTTSService is a mock implementation for development
|
|
type MockTTSService struct{}
|
|
|
|
// NewMockTTSService creates a new mock TTS service
|
|
func NewMockTTSService() *MockTTSService {
|
|
return &MockTTSService{}
|
|
}
|
|
|
|
// SynthesizeStream synthesizes text to audio stream
|
|
func (s *MockTTSService) SynthesizeStream(ctx context.Context, text string) (io.Reader, error) {
|
|
// Mock implementation - in production, integrate with ElevenLabs, Azure TTS, etc.
|
|
// For now, return empty reader
|
|
return io.NopCloser(io.Reader(nil)), nil
|
|
}
|
|
|
|
// Synthesize synthesizes text to audio
|
|
func (s *MockTTSService) Synthesize(ctx context.Context, text string) ([]byte, error) {
|
|
// Mock implementation
|
|
return []byte{}, nil
|
|
}
|
|
|
|
// GetVisemes returns viseme events for lip sync
|
|
func (s *MockTTSService) GetVisemes(ctx context.Context, text string) ([]VisemeEvent, error) {
|
|
// Mock implementation - return basic visemes
|
|
return []VisemeEvent{
|
|
{Viseme: "sil", StartTime: 0.0, EndTime: 0.1},
|
|
{Viseme: "aa", StartTime: 0.1, EndTime: 0.3},
|
|
{Viseme: "ee", StartTime: 0.3, EndTime: 0.5},
|
|
}, nil
|
|
}
|
|
|
|
// ElevenLabsTTSService integrates with ElevenLabs (implementation in elevenlabs-adapter.go)
|
|
// This interface definition is kept for backwards compatibility
|
|
// The actual implementation is in elevenlabs-adapter.go
|
|
|