add rename demo sample

state.py

@@ -567,9 +567,64 @@ def load_demo_multi(demo_paths):
     st.session_state.analyzeAllToggle = True
 
 
+# Fixed population values for each demo file — randomized once at design time,
+# then hardcoded so repeated demo loads always show the same number.
+_DEMO_POPULATIONS = {
+    "sample.rttm": 26,
+    "sample_short.rttm": 27,
+    "class01.rttm": 28,
+    "class02.rttm": 28,
+    "class03.rttm": 28,
+    "class04.rttm": 26,
+    "class05.rttm": 26,
+    "class06.rttm": 28,
+    "class07.rttm": 28,
+    "class08.rttm": 28,
+    "class09.rttm": 27,
+    "class10.rttm": 28,
+}
+
+
+# Fixed rename list for the Single File Demo (Sample) — used by the
+# "Rename Sample Speakers" button. Index 0 maps to SPEAKER_001, etc.
+_SAMPLE_DEMO_RENAMES = [
+    "Tannin no sensei",
+    "Tadano Hitohito",
+    "Osana Najimi",
+    "Yamai Ren",
+    "Agari Himiko",
+    "Nakanaka Omoharu",
+    "Yadano Makeru",
+    "Kishi Himeko",
+    "Onigashima Akako",
+    "Chiarai Shigeo",
+    "Sonoda Taisei",
+    "Shinobino Mono",
+    "Inaka Nokoko",
+    "Onemine Nene",
+    "Otori Kaede",
+    "Katai Makoto",
+    "Naruse Shisuto",
+    "Kometani Chushaku",
+]
+
+
+def rename_sample_demo_speakers(fname):
+    """Rename every speaker in the Single File Demo (Sample) file to the
+    fixed name list, in SPEAKER_001, SPEAKER_002... order."""
+    if fname not in st.session_state.results:
+        return
+    annotation, _ = st.session_state.results[fname]
+    labels = sorted(annotation.labels())  # SPEAKER_001, SPEAKER_002, ...
+
+    st.session_state.speakerRenames.setdefault(fname, {})
+    for sp, name in zip(labels, _SAMPLE_DEMO_RENAMES):
+        st.session_state.speakerRenames[fname][sp] = name
+
+
 def _setup_demo_roles_population(fname):
     """Assign SPEAKER_001 to Instructor, all others to Students, and set
-    a random population in [24, 28] for the given demo file."""
+    a fixed population for the given demo file (from _DEMO_POPULATIONS)."""
     if fname not in st.session_state.results:
         return
     annotation, _ = st.session_state.results[fname]
@@ -594,7 +649,9 @@ def _setup_demo_roles_population(fname):
     st.session_state.unusedSpeakers[fname] = [
         sp for sp in labels if f"{fname}: {sp}" not in all_assigned
     ]
-    st.session_state.studentPopulations[fname] = random.randint(24, 28)
+    # Look up the base filename (without any path prefix) for the fixed value
+    base_name = fname.split("/")[-1]
+    st.session_state.studentPopulations[fname] = _DEMO_POPULATIONS.get(base_name, 27)
 
 
 def run_analysis_loop(file_names, file_paths_dict):