Move the handling of human-readable input resolution printing into C++; every theme...

[nageru] / nageru / theme.cpp

diff --git a/nageru/theme.cpp b/nageru/theme.cpp
index c881dc6891be2b1a32e90fb1b3fb8ec3b043f515..8050003b2025459651d20a99dea5f4d120347da3 100644 (file)
--- a/nageru/theme.cpp
+++ b/nageru/theme.cpp
@@ -700,6 +700,69 @@ int InputStateInfo_get_last_subtitle(lua_State* L)
        return 1;
 }
 
+namespace {
+
+// Helper function to write e.g. “60” or “59.94”.
+string format_frame_rate(int nom, int den)
+{
+       char buf[256];
+       if (nom % den == 0) {
+               snprintf(buf, sizeof(buf), "%d", nom / den);
+       } else {
+               snprintf(buf, sizeof(buf), "%.2f", double(nom) / den);
+       }
+       return buf;
+}
+
+// Helper function to write e.g. “720p60”.
+string get_human_readable_resolution(const InputStateInfo *input_state_info, int signal_num)
+{
+       char buf[256];
+       if (input_state_info->last_interlaced[signal_num]) {
+               snprintf(buf, sizeof(buf), "%di", input_state_info->last_height[signal_num] * 2);
+
+               // Show field rate instead of frame rate; really for cosmetics only
+               // (and actually contrary to EBU recommendations, although in line
+               // with typical user expectations).
+               return buf + format_frame_rate(input_state_info->last_frame_rate_nom[signal_num] * 2,
+                       input_state_info->last_frame_rate_den[signal_num]);
+       } else {
+               snprintf(buf, sizeof(buf), "%dp", input_state_info->last_height[signal_num]);
+               return buf + format_frame_rate(input_state_info->last_frame_rate_nom[signal_num],
+                       input_state_info->last_frame_rate_den[signal_num]);
+       }
+}
+
+} // namespace
+
+int InputStateInfo_get_human_readable_resolution(lua_State* L)
+{
+       assert(lua_gettop(L) == 2);
+       InputStateInfo *input_state_info = get_input_state_info(L, 1);
+       Theme *theme = get_theme_updata(L);
+       int signal_num = theme->map_signal(luaL_checknumber(L, 2));
+
+       string str;
+       if (!input_state_info->last_is_connected[signal_num]) {
+               str = "disconnected";
+       } else if (input_state_info->last_height[signal_num]) {
+               str = "no signal";
+       } else if (!input_state_info->last_has_signal[signal_num]) {
+               if (input_state_info->last_height[signal_num]) {
+                       // Special mode for the USB3 cards.
+                       str = "no signal";
+               } else {
+                       str = get_human_readable_resolution(input_state_info, signal_num) + ", no signal";
+               }
+       } else {
+               str = get_human_readable_resolution(input_state_info, signal_num);
+       }
+
+       lua_pushstring(L, str.c_str());
+       return 1;
+}
+
+
 int EffectBlueprint_set_int(lua_State *L)
 {
        assert(lua_gettop(L) == 3);
@@ -921,6 +984,7 @@ const luaL_Reg InputStateInfo_funcs[] = {
        { "get_frame_rate_nom", InputStateInfo_get_frame_rate_nom },
        { "get_frame_rate_den", InputStateInfo_get_frame_rate_den },
        { "get_last_subtitle", InputStateInfo_get_last_subtitle },
+       { "get_human_readable_resolution", InputStateInfo_get_human_readable_resolution },
        { NULL, NULL }
 };