stats.lua: show also min_luma if max_luma is nominal SDR

Useful to see set black point.

Author: kasper93

player/lua/stats.lua

@@ -810,30 +810,33 @@ local function append_hdr(s, hdr, video_out)
         return
     end
 
-    local function should_show(val)
-        return val and val ~= 203 and val > 0
+    local function has(val, target)
+        return val and math.abs(val - target) > 1e-4
     end
 
     -- If we are printing video out parameters it is just display, not mastering
     local display_prefix = video_out and "Display:" or "Mastering display:"
 
     local indent = ""
+    local has_dml = has(hdr["min-luma"], 0.203) or has(hdr["max-luma"], 203)
+    local has_cll = hdr["max-cll"] and hdr["max-cll"] > 0
+    local has_fall = hdr["max-fall"] and hdr["max-fall"] > 0
 
-    if should_show(hdr["max-cll"]) or should_show(hdr["max-luma"]) then
+    if has_dml or has_cll or has_fall then
         append(s, "", {prefix="HDR10:"})
-        if hdr["min-luma"] and should_show(hdr["max-luma"]) then
+        if has_dml then
             -- libplacebo uses close to zero values as "defined zero"
             hdr["min-luma"] = hdr["min-luma"] <= 1e-6 and 0 or hdr["min-luma"]
             append(s, format("%.2g / %.0f", hdr["min-luma"], hdr["max-luma"]),
                 {prefix=display_prefix, suffix=" cd/m²", nl="", indent=indent})
             indent = o.prefix_sep .. o.prefix_sep
         end
-        if should_show(hdr["max-cll"]) then
+        if has_cll then
             append(s, string.format("%.0f", hdr["max-cll"]), {prefix="MaxCLL:",
                                     suffix=" cd/m²", nl="", indent=indent})
             indent = o.prefix_sep .. o.prefix_sep
         end
-        if hdr["max-fall"] and hdr["max-fall"] > 0 then
+        if has_fall then
             append(s, hdr["max-fall"], {prefix="MaxFALL:", suffix=" cd/m²", nl="",
                                         indent=indent})
         end