refactor: cap waveform decode length + guard frombuffer + tighten test

2026-07-02 15:00:34 +02:00
parent 12eaa944a7
commit 7501c4729b
3 changed files with 11 additions and 2 deletions
@@ -6511,12 +6511,17 @@ class MainWindow(QMainWindow):
        from core.waveform import load_region_samples, peaks
        start = self._cursor
        dur = self._spn_audio_len.value()
+        preview = min(dur, 120.0)   # cap decode; the strip is 128 bars regardless
        QApplication.setOverrideCursor(Qt.CursorShape.WaitCursor)
        try:
-            samples = load_region_samples(self._file_path, start, dur)
+            samples = load_region_samples(self._file_path, start, preview)
        finally:
            QApplication.restoreOverrideCursor()
        self._wave.set_peaks(peaks(samples))
+        if samples.size == 0:
+            self._show_status("Waveform: no audio decoded", 3000)
+        elif preview < dur:
+            self._show_status(f"Waveform shows first {preview:.0f}s of {dur:.0f}s", 4000)

    def _on_extract_audio(self) -> None:
        """Extract an exact-length audio slice starting at the playhead and