playlist retry-exhaustion handling

cmd/mxl-player/playlist_file.go

@@ -11,8 +11,9 @@ import (
 )
 
 type playlistFile struct {
-	Entries []playlistFileEntry `json:"entries"`
-	Loop    bool                `json:"loop"`
+	Entries   []playlistFileEntry `json:"entries"`
+	Loop      bool                `json:"loop"`
+	OnFailure string              `json:"on_failure"`
 }
 
 type playlistFileEntry struct {
@@ -62,6 +63,16 @@ func decodePlaylistFile(reader io.Reader) (playback.Playlist, error) {
 		Entries: make([]playback.PlaylistEntry, len(file.Entries)),
 		Loop:    file.Loop,
 	}
+	switch file.OnFailure {
+	case "", "wait":
+		playlist.OnFailure = playback.PlaylistFailureWait
+	case "next":
+		playlist.OnFailure = playback.PlaylistFailureNext
+	default:
+		return playback.Playlist{}, fmt.Errorf(
+			"on_failure %q: %w", file.OnFailure, playback.ErrPlaylistFailurePolicy,
+		)
+	}
 	for index, entry := range file.Entries {
 		duration := time.Duration(0)
 		if entry.Duration != "" {