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);
{ "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 }
};
if (lua_pcall(L, 0, 1, 0) != 0) {
fprintf(stderr, "error running function `num_channels': %s\n", lua_tostring(L, -1));
+ fprintf(stderr, "Try Nageru.set_num_channels(...) at the start of the script instead.\n");
abort();
}
} // namespace
+int Nageru_set_channel_name(lua_State *L)
+{
+ // NOTE: m is already locked.
+ Theme *theme = get_theme_updata(L);
+ unsigned channel = luaL_checknumber(L, 1);
+ const string text = checkstdstring(L, 2);
+ theme->channel_names[channel] = text;
+ lua_pop(L, 2);
+ return 0;
+}
+
+int Nageru_set_num_channels(lua_State *L)
+{
+ // NOTE: m is already locked.
+ Theme *theme = get_theme_updata(L);
+ if (theme->startup_finished) {
+ luaL_error(L, "set_num_channels() can only be called at startup.");
+ }
+ theme->num_channels = luaL_checknumber(L, 1);
+ lua_pop(L, 1);
+ return 0;
+}
+
Theme::Theme(const string &filename, const vector<string> &search_dirs, ResourcePool *resource_pool, unsigned num_cards)
: resource_pool(resource_pool), num_cards(num_cards), signal_to_card_mapping(global_flags.default_stream_mapping)
{
}
// Set up the API we provide.
- register_constants();
+ register_globals();
register_class("Scene", Scene_funcs);
register_class("Block", Block_funcs);
register_class("EffectBlueprint", EffectBlueprint_funcs);
}
assert(lua_gettop(L) == 0);
- // Ask it for the number of channels.
- num_channels = call_num_channels(L);
+ if (num_channels == -1) {
+ // Ask it for the number of channels.
+ num_channels = call_num_channels(L);
+ }
+ startup_finished = true;
}
Theme::~Theme()
lua_close(L);
}
-void Theme::register_constants()
+void Theme::register_globals()
{
// Set Nageru.VIDEO_FORMAT_BGRA = bmusb::PixelFormat_8BitBGRA, etc.
const vector<pair<string, int>> num_constants = {
lua_settable(L, 1); // t[key] = value
}
+ const luaL_Reg Nageru_funcs[] = {
+ { "set_channel_name", Nageru_set_channel_name },
+ { "set_num_channels", Nageru_set_num_channels },
+ { NULL, NULL }
+ };
+ lua_pushlightuserdata(L, this);
+ luaL_setfuncs(L, Nageru_funcs, 1); // for (name,f in funcs) { mt[name] = f, with upvalue {theme} }
+
lua_setglobal(L, "Nageru"); // Nageru = t
assert(lua_gettop(L) == 0);
}
string Theme::get_channel_name(unsigned channel)
{
lock_guard<mutex> lock(m);
+
lua_getglobal(L, "channel_name");
+ if (lua_isnil(L, -1)) {
+ lua_pop(L, 1);
+ if (channel_names.count(channel)) {
+ return channel_names[channel];
+ } else {
+ return "(no title)";
+ }
+ }
+
lua_pushnumber(L, channel);
if (lua_pcall(L, 1, 1, 0) != 0) {
fprintf(stderr, "error running function `channel_name': %s\n", lua_tostring(L, -1));
const char *ret = lua_tostring(L, -1);
if (ret == nullptr) {
fprintf(stderr, "function `channel_name' returned nil for channel %d\n", channel);
+ fprintf(stderr, "Try Nageru.set_channel_name(channel, name) at the start of the script instead.\n");
abort();
}
projects / nageru / blobdiff