Fix #628: Add setting to transcode stream

backend/config.go

@@ -142,7 +142,10 @@ type ThemeConfig struct {
 }
 
 type TranscodingConfig struct {
-	ForceRawFile bool
+	ForceRawFile     bool
+	RequestTranscode bool
+	Codec            string
+	MaxBitRateKBPS   int
 }
 
 type PeakMeterConfig struct {
@@ -260,7 +263,10 @@ func DefaultConfig(appVersionTag string) *Config {
 			PreventClipping: true,
 		},
 		Transcoding: TranscodingConfig{
-			ForceRawFile: false,
+			ForceRawFile:     false,
+			RequestTranscode: false,
+			Codec:            "opus",
+			MaxBitRateKBPS:   160,
 		},
 		Theme: ThemeConfig{
 			Appearance: "Dark",

backend/mediaprovider/jellyfin/jellyfinmediaprovider.go

@@ -332,12 +332,19 @@ func (j *jellyfinMediaProvider) SetFavorite(params mediaprovider.RatingFavoriteP
 	return err
 }
 
-func (j *jellyfinMediaProvider) GetStreamURL(trackID string, forceRaw bool) (string, error) {
-	return j.client.GetStreamURL(trackID)
+func (j *jellyfinMediaProvider) GetStreamURL(trackID string, transcode *mediaprovider.TranscodeSettings, forceRaw bool) (string, error) {
+	var jfTranscode *jellyfin.TranscodeOptions
+	if transcode != nil {
+		jfTranscode = &jellyfin.TranscodeOptions{
+			AudioCodec:   transcode.Codec,
+			AudioBitRate: uint32(transcode.BitRateKBPS * 1000),
+		}
+	}
+	return j.client.GetStreamURL(trackID, jfTranscode)
 }
 
 func (j *jellyfinMediaProvider) DownloadTrack(trackID string) (io.Reader, error) {
-	url, err := j.client.GetStreamURL(trackID)
+	url, err := j.client.GetStreamURL(trackID, nil)
 	if err != nil {
 		return nil, err
 	}

backend/mediaprovider/mediaprovider.go

@@ -184,6 +184,11 @@ type LoginResponse struct {
 	IsAuthError bool
 }
 
+type TranscodeSettings struct {
+	Codec       string
+	BitRateKBPS int
+}
+
 type Server interface {
 	Login(username, password string) LoginResponse
 	MediaProvider() MediaProvider
@@ -234,7 +239,7 @@ type MediaProvider interface {
 
 	GetFavorites() (Favorites, error)
 
-	GetStreamURL(trackID string, forceRaw bool) (string, error)
+	GetStreamURL(trackID string, transcodeSettings *TranscodeSettings, forceRaw bool) (string, error)
 
 	GetTopTracks(artist Artist, count int) ([]*Track, error)
 

backend/mediaprovider/subsonic/subsonicmediaprovider.go

@@ -234,9 +234,12 @@ func (s *subsonicMediaProvider) GetSimilarTracks(artistID string, count int) ([]
 	return sharedutil.MapSlice(tr, toTrack), nil
 }
 
-func (s *subsonicMediaProvider) GetStreamURL(trackID string, forceRaw bool) (string, error) {
+func (s *subsonicMediaProvider) GetStreamURL(trackID string, transcode *mediaprovider.TranscodeSettings, forceRaw bool) (string, error) {
 	m := make(map[string]string)
-	if forceRaw {
+	if transcode != nil {
+		m["format"] = transcode.Codec
+		m["maxBitRate"] = strconv.Itoa(transcode.BitRateKBPS)
+	} else if forceRaw {
 		m["format"] = "raw"
 	}
 	u, err := s.client.GetStreamURL(trackID, m)

backend/playbackengine.go

@@ -652,7 +652,14 @@ func (p *playbackEngine) setTrack(idx int, next bool, startTime float64) error {
 			item := p.playQueue[idx]
 			meta = item.Metadata()
 			if tr, ok := item.(*mediaprovider.Track); ok {
-				url, err = p.sm.Server.GetStreamURL(tr.ID, p.transcodeCfg.ForceRawFile)
+				var ts *mediaprovider.TranscodeSettings
+				if p.transcodeCfg.RequestTranscode {
+					ts = &mediaprovider.TranscodeSettings{
+						Codec:       p.transcodeCfg.Codec,
+						BitRateKBPS: p.transcodeCfg.MaxBitRateKBPS,
+					}
+				}
+				url, err = p.sm.Server.GetStreamURL(tr.ID, ts, p.transcodeCfg.ForceRawFile)
 			} else {
 				url = item.(*mediaprovider.RadioStation).StreamURL
 			}