X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=nageru%2Ftheme.cpp;h=ade4e8fd2dc7f8f6359c9bea8acf05e5e7ccf748;hb=09886e5989fe0dc2516bcadeacae4269ac22f03a;hp=d2a7bba3144f0a4e655ffd6241a926dcb08441f5;hpb=bcd177e1daf5a63d7bf877bc5d30d8803dfd472c;p=nageru

diff --git a/nageru/theme.cpp b/nageru/theme.cpp
index d2a7bba..ade4e8f 100644
--- a/nageru/theme.cpp
+++ b/nageru/theme.cpp
@@ -29,6 +29,7 @@
 #include <new>
 #include <utility>
 
+#include "audio_mixer.h"
 #include "defs.h"
 #ifdef HAVE_CEF
 #include "cef_capture.h"
@@ -38,6 +39,7 @@
 #include "image_input.h"
 #include "input_state.h"
 #include "lua_utils.h"
+#include "mainwindow.h"
 #include "pbo_frame_allocator.h"
 #include "scene.h"
 
@@ -1298,6 +1300,118 @@ int Nageru_set_supports_wb(lua_State *L)
 	return 0;
 }
 
+// NOTE: There's a race condition in all of the audio functions; if the mapping
+// is changed by the user underway, you might not be manipulating the bus you
+// expect. (You should not get crashes, though.) There's not all that much we
+// can do about it, short of locking the entire mixer while anything from the
+// theme runs.
+
+int Nageru_get_num_audio_buses(lua_State *L)
+{
+	if (global_audio_mixer == nullptr) {
+		// The audio mixer isn't set up until we know how many FFmpeg inputs we have.
+		luaL_error(L, "Audio functions can not be called before the theme is done initializing.");
+	}
+	lua_pushinteger(L, global_audio_mixer->num_buses());
+	return 1;
+}
+
+int Nageru_get_audio_bus_name(lua_State *L)
+{
+	if (global_audio_mixer == nullptr) {
+		// The audio mixer isn't set up until we know how many FFmpeg inputs we have.
+		luaL_error(L, "Audio functions can not be called before the theme is done initializing.");
+	}
+	int bus_index = luaL_checknumber(L, 1);
+	InputMapping input_mapping = global_audio_mixer->get_input_mapping();
+	if (bus_index < 0 || size_t(bus_index) >= input_mapping.buses.size()) {
+		// Doesn't fix the race, but fixes other out-of-bounds.
+		print_warning(L, "Theme called get_audio_bus_name() on nonexistent bus %d; returning nil.\n", bus_index);
+		lua_pushnil(L);
+	} else {
+		lua_pushstring(L, input_mapping.buses[bus_index].name.c_str());
+	}
+	return 1;
+}
+
+int Nageru_get_audio_bus_fader_level_db(lua_State *L)
+{
+	if (global_audio_mixer == nullptr) {
+		// The audio mixer isn't set up until we know how many FFmpeg inputs we have.
+		luaL_error(L, "Audio functions can not be called before the theme is done initializing.");
+	}
+
+	int bus_index = luaL_checknumber(L, 1);
+	if (bus_index < 0 || size_t(bus_index) >= global_audio_mixer->num_buses()) {
+		// Doesn't fix the race, but fixes other out-of-bounds.
+		print_warning(L, "Theme called get_audio_bus_fader_level_db() on nonexistent bus %d; returning 0.0.\n", bus_index);
+		lua_pushnumber(L, 0.0);
+	} else {
+		lua_pushnumber(L, global_audio_mixer->get_fader_volume(bus_index));
+	}
+	return 1;
+}
+
+int Nageru_set_audio_bus_fader_level_db(lua_State *L)
+{
+	if (global_audio_mixer == nullptr || global_mainwindow == nullptr) {
+		// The audio mixer isn't set up until we know how many FFmpeg inputs we have.
+		luaL_error(L, "Audio functions can not be called before the theme is done initializing.");
+	}
+
+	int bus_index = luaL_checknumber(L, 1);
+	if (bus_index < 0 || size_t(bus_index) >= global_audio_mixer->num_buses()) {
+		// Doesn't fix the race, but fixes other out-of-bounds.
+		print_warning(L, "Theme called set_audio_bus_fader_level_db() on nonexistent bus %d; ignoring.\n", bus_index);
+		return 0;
+	}
+	double level_db = luaL_checknumber(L, 2);
+
+	// Go through the UI, so that it gets updated.
+	global_mainwindow->set_fader_absolute(bus_index, level_db);
+	return 0;
+}
+
+int Nageru_get_audio_bus_mute(lua_State *L)
+{
+	if (global_audio_mixer == nullptr) {
+		// The audio mixer isn't set up until we know how many FFmpeg inputs we have.
+		luaL_error(L, "Audio functions can not be called before the theme is done initializing.");
+	}
+
+	int bus_index = luaL_checknumber(L, 1);
+	if (bus_index < 0 || size_t(bus_index) >= global_audio_mixer->num_buses()) {
+		// Doesn't fix the race, but fixes other out-of-bounds.
+		print_warning(L, "Theme called get_audio_bus_mute() on nonexistent bus %d; returning false.\n", bus_index);
+		lua_pushboolean(L, false);
+	} else {
+		lua_pushboolean(L, global_audio_mixer->get_mute(bus_index));
+	}
+	return 1;
+}
+
+int Nageru_set_audio_bus_mute(lua_State *L)
+{
+	if (global_audio_mixer == nullptr || global_mainwindow == nullptr) {
+		// The audio mixer isn't set up until we know how many FFmpeg inputs we have.
+		luaL_error(L, "Audio functions can not be called before the theme is done initializing.");
+	}
+
+	int bus_index = luaL_checknumber(L, 1);
+	if (bus_index < 0 || size_t(bus_index) >= global_audio_mixer->num_buses()) {
+		// Doesn't fix the race, but fixes other out-of-bounds.
+		print_warning(L, "Theme called set_audio_bus_mute() on nonexistent bus %d; ignoring.\n", bus_index);
+		return 0;
+	}
+	bool mute = checkbool(L, 2);
+
+	// Go through the UI, so that it gets updated.
+	if (mute != global_audio_mixer->get_mute(bus_index)) {
+		global_mainwindow->toggle_mute(bus_index);
+	}
+	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)
 {
@@ -1443,11 +1557,21 @@ void Theme::register_globals()
 	}
 
 	const luaL_Reg Nageru_funcs[] = {
+		// Channel information.
 		{ "set_channel_name", Nageru_set_channel_name },
 		{ "set_num_channels", Nageru_set_num_channels },
 		{ "set_channel_signal", Nageru_set_channel_signal },
 		{ "set_supports_wb", Nageru_set_supports_wb },
-		{ NULL, NULL }
+
+		// Audio.
+		{ "get_num_audio_buses", Nageru_get_num_audio_buses },
+		{ "get_audio_bus_name", Nageru_get_audio_bus_name },
+		{ "get_audio_bus_fader_level_db", Nageru_get_audio_bus_fader_level_db },
+		{ "set_audio_bus_fader_level_db", Nageru_set_audio_bus_fader_level_db },
+		{ "get_audio_bus_mute", Nageru_get_audio_bus_mute },
+		{ "set_audio_bus_mute", Nageru_set_audio_bus_mute },
+
+		{ nullptr, nullptr }
 	};
 	lua_pushlightuserdata(L, this);
 	luaL_setfuncs(L, Nageru_funcs, 1);        // for (name,f in funcs) { mt[name] = f, with upvalue {theme} }