Small refactorings

core/media_streamer.go

@@ -24,14 +24,14 @@ type MediaStreamer interface {
 
 type TranscodingCache cache.FileCache
 
-func NewMediaStreamer(ds model.DataStore, ffm transcoder.Transcoder, cache TranscodingCache) MediaStreamer {
-	return &mediaStreamer{ds: ds, ffm: ffm, cache: cache}
+func NewMediaStreamer(ds model.DataStore, t transcoder.Transcoder, cache TranscodingCache) MediaStreamer {
+	return &mediaStreamer{ds: ds, transcoder: t, cache: cache}
 }
 
 type mediaStreamer struct {
-	ds    model.DataStore
-	ffm   transcoder.Transcoder
-	cache cache.FileCache
+	ds         model.DataStore
+	transcoder transcoder.Transcoder
+	cache      cache.FileCache
 }
 
 type streamJob struct {
@@ -182,7 +182,7 @@ func GetTranscodingCache() TranscodingCache {
 					log.Error(ctx, "Error loading transcoding command", "format", job.format, err)
 					return nil, os.ErrInvalid
 				}
-				out, err := job.ms.ffm.Start(ctx, t.Command, job.mf.Path, job.bitRate)
+				out, err := job.ms.transcoder.Start(ctx, t.Command, job.mf.Path, job.bitRate)
 				if err != nil {
 					log.Error(ctx, "Error starting transcoder", "id", job.mf.ID, err)
 					return nil, os.ErrInvalid

core/transcoder/transcoder.go

@@ -16,19 +16,15 @@ type Transcoder interface {
 }
 
 func New() Transcoder {
-	_, err := exec.LookPath("ffmpeg")
-	if err != nil {
-		log.Error("Unable to find ffmpeg", err)
-	}
-	return &ffmpeg{}
+	return &externalTranscoder{}
 }
 
-type ffmpeg struct{}
+type externalTranscoder struct{}
 
-func (ff *ffmpeg) Start(ctx context.Context, command, path string, maxBitRate int) (f io.ReadCloser, err error) {
+func (e *externalTranscoder) Start(ctx context.Context, command, path string, maxBitRate int) (f io.ReadCloser, err error) {
 	args := createTranscodeCommand(command, path, maxBitRate)
 
-	log.Trace(ctx, "Executing ffmpeg command", "cmd", args)
+	log.Trace(ctx, "Executing transcoding command", "cmd", args)
 	cmd := exec.Command(args[0], args[1:]...) // #nosec
 	cmd.Stderr = os.Stderr
 	if f, err = cmd.StdoutPipe(); err != nil {