srt: support ignoring slur notes (#677)

libresvip/plugins/srt/options.py

@@ -43,4 +43,11 @@ class OutputOptions(SelectSingleTrackMixin, BaseModel):
         description=_("In milliseconds, positive means ahead, negative means opposite."),
     )
     split_by: SplitOption = Field(title=_("New line by"), default=SplitOption.BOTH)
+    ignore_slur_notes: bool = Field(
+        title=_("Ignore slur notes"),
+        description=_(
+            "Ignore '-' lyrics that are used to indicate slur notes in singing synthesizers."
+        ),
+        default=True,
+    )
     encoding: str = Field(title=_("Text encoding"), default="utf-8")

libresvip/plugins/srt/srt_generator.py

@@ -45,13 +45,20 @@ def generate_project(self, project: Project) -> SSAFile:
                 buffer = []
         return lyric_lines
 
+    def lyric_included(self, lyric: str) -> bool:
+        if self.options.ignore_slur_notes:
+            return lyric != "-"
+        else:
+            return True
+
     def commit_current_lyric_line(self, lyric_lines: list[SSAEvent], buffer: list[Note]) -> None:
         start_time = int(self.synchronizer.get_actual_secs_from_ticks(buffer[0].start_pos) * 1000)
         end_time = int(self.synchronizer.get_actual_secs_from_ticks(buffer[-1].end_pos) * 1000)
         lyrics = "".join(
             SYMBOL_PATTERN.sub("", note.lyric)
             + (" " if LATIN_ALPHABET.search(note.lyric) is not None else "")
             for note in buffer
+            if self.lyric_included(note.lyric)
         ).strip()
         lyric_lines.append(
             SSAEvent(