fix: untangle pkg/grpc and core/schema for Transcription (#3419)

untangle pkg/grpc and core/schema in Transcribe

Signed-off-by: Dave Lee <dave@gray101.com>

core/backend/transcript.go

@@ -3,6 +3,7 @@ package backend
 import (
 	"context"
 	"fmt"
+	"time"
 
 	"github.com/mudler/LocalAI/core/config"
 	"github.com/mudler/LocalAI/core/schema"
@@ -30,10 +31,31 @@ func ModelTranscription(audio, language string, translate bool, ml *model.ModelL
 		return nil, fmt.Errorf("could not load whisper model")
 	}
 
-	return whisperModel.AudioTranscription(context.Background(), &proto.TranscriptRequest{
+	r, err := whisperModel.AudioTranscription(context.Background(), &proto.TranscriptRequest{
 		Dst:       audio,
 		Language:  language,
 		Translate: translate,
 		Threads:   uint32(*backendConfig.Threads),
 	})
+	if err != nil {
+		return nil, err
+	}
+	tr := &schema.TranscriptionResult{
+		Text: r.Text,
+	}
+	for _, s := range r.Segments {
+		var tks []int
+		for _, t := range s.Tokens {
+			tks = append(tks, int(t))
+		}
+		tr.Segments = append(tr.Segments,
+			schema.Segment{
+				Text:   s.Text,
+				Id:     int(s.Id),
+				Start:  time.Duration(s.Start),
+				End:    time.Duration(s.End),
+				Tokens: tks,
+			})
+	}
+	return tr, err
 }