[CSM] sound_play & sound_stop support + client_lua_api doc (#5096)

* squashed: CSM: Implement register_globalstep
  * Re-use fatal error mechanism from server to disconnect client on CSM error
  * Little client functions cleanups

* squashed: CSM: add core.after function
  * core.after is shared code between client & server
  * ModApiUtil get_us_time feature enabled for client

7 files changed, 105 insertions, 37 deletions

diff --git a/src/script/lua_api/CMakeLists.txt b/src/script/lua_api/CMakeLists.txt
index ea3d75ffa..17bcdde4c 100644
--- a/src/script/lua_api/CMakeLists.txt
+++ b/src/script/lua_api/CMakeLists.txt
@@ -25,4 +25,5 @@ set(common_SCRIPT_LUA_API_SRCS
 set(client_SCRIPT_LUA_API_SRCS
 	${CMAKE_CURRENT_SOURCE_DIR}/l_client.cpp
 	${CMAKE_CURRENT_SOURCE_DIR}/l_mainmenu.cpp
+	${CMAKE_CURRENT_SOURCE_DIR}/l_sound.cpp
 	PARENT_SCOPE)
diff --git a/src/script/lua_api/l_client.h b/src/script/lua_api/l_client.h
index e3106e742..150880e3c 100644
--- a/src/script/lua_api/l_client.h
+++ b/src/script/lua_api/l_client.h
@@ -23,7 +23,8 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 
 #include "lua_api/l_base.h"
 
-class ModApiClient : public ModApiBase
+class ModApiClient:
+	public ModApiBase
 {
 private:
 	// get_current_modname()
diff --git a/src/script/lua_api/l_mainmenu.cpp b/src/script/lua_api/l_mainmenu.cpp
index de8890b11..3d204db98 100644
--- a/src/script/lua_api/l_mainmenu.cpp
+++ b/src/script/lua_api/l_mainmenu.cpp
@@ -32,9 +32,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "convert_json.h"
 #include "serverlist.h"
 #include "mapgen.h"
-#include "sound.h"
 #include "settings.h"
-#include "log.h"
 #include "EDriverTypes.h"
 
 #include <IFileArchive.h>
@@ -963,33 +961,6 @@ int ModApiMainMenu::l_show_file_open_dialog(lua_State *L)
 }
 
 /******************************************************************************/
-int ModApiMainMenu::l_sound_play(lua_State *L)
-{
-	GUIEngine* engine = getGuiEngine(L);
-
-	SimpleSoundSpec spec;
-	read_soundspec(L, 1, spec);
-	bool looped = lua_toboolean(L, 2);
-
-	u32 handle = engine->playSound(spec, looped);
-
-	lua_pushinteger(L, handle);
-
-	return 1;
-}
-
-/******************************************************************************/
-int ModApiMainMenu::l_sound_stop(lua_State *L)
-{
-	GUIEngine* engine = getGuiEngine(L);
-
-	u32 handle = luaL_checkinteger(L, 1);
-	engine->stopSound(handle);
-
-	return 1;
-}
-
-/******************************************************************************/
 int ModApiMainMenu::l_download_file(lua_State *L)
 {
 	const char *url    = luaL_checkstring(L, 1);
@@ -1160,8 +1131,6 @@ void ModApiMainMenu::Initialize(lua_State *L, int top)
 	API_FCT(download_file);
 	API_FCT(get_modstore_details);
 	API_FCT(get_modstore_list);
-	API_FCT(sound_play);
-	API_FCT(sound_stop);
 	API_FCT(gettext);
 	API_FCT(get_video_drivers);
 	API_FCT(get_video_modes);
diff --git a/src/script/lua_api/l_mainmenu.h b/src/script/lua_api/l_mainmenu.h
index ad5155ac6..e31ac0112 100644
--- a/src/script/lua_api/l_mainmenu.h
+++ b/src/script/lua_api/l_mainmenu.h
@@ -25,7 +25,8 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 class AsyncEngine;
 
 /** Implementation of lua api support for mainmenu */
-class ModApiMainMenu : public ModApiBase {
+class ModApiMainMenu: public ModApiBase
+{
 
 private:
 	/**
@@ -79,10 +80,6 @@ private:
 
 	static int l_delete_favorite(lua_State *L);
 
-	static int l_sound_play(lua_State *L);
-
-	static int l_sound_stop(lua_State *L);
-
 	static int l_gettext(lua_State *L);
 
 	//gui
diff --git a/src/script/lua_api/l_sound.cpp b/src/script/lua_api/l_sound.cpp
new file mode 100644
index 000000000..774b5be0c
--- /dev/null
+++ b/src/script/lua_api/l_sound.cpp
@@ -0,0 +1,62 @@
+/*
+Minetest
+Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
+Copyright (C) 2017 nerzhul, Loic Blot <loic.blot@unix-experience.fr>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#include "l_sound.h"
+#include "l_internal.h"
+#include "common/c_content.h"
+#include "guiEngine.h"
+
+
+int ModApiSound::l_sound_play(lua_State *L)
+{
+	SimpleSoundSpec spec;
+	read_soundspec(L, 1, spec);
+	bool looped = lua_toboolean(L, 2);
+
+	s32 handle;
+	if (Client *client = getClient(L))
+		handle = client->getSoundManager()->playSound(spec, looped);
+	// Main menu doesn't have access to client, use guiEngine
+	else
+		handle = getGuiEngine(L)->playSound(spec, looped);
+
+	lua_pushinteger(L, handle);
+
+	return 1;
+}
+
+int ModApiSound::l_sound_stop(lua_State *L)
+{
+	u32 handle = luaL_checkinteger(L, 1);
+
+	if (Client *client = getClient(L))
+		client->getSoundManager()->stopSound(handle);
+	// Main menu doesn't have access to client, use guiEngine
+	else
+		getGuiEngine(L)->stopSound(handle);
+
+	return 1;
+}
+
+void ModApiSound::Initialize(lua_State *L, int top)
+{
+	API_FCT(sound_play);
+	API_FCT(sound_stop);
+}
diff --git a/src/script/lua_api/l_sound.h b/src/script/lua_api/l_sound.h
new file mode 100644
index 000000000..86ba9087b
--- /dev/null
+++ b/src/script/lua_api/l_sound.h
@@ -0,0 +1,36 @@
+/*
+Minetest
+Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
+Copyright (C) 2017 nerzhul, Loic Blot <loic.blot@unix-experience.fr>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#ifndef L_SOUND_H_
+#define L_SOUND_H_
+
+#include "lua_api/l_base.h"
+
+
+class ModApiSound: public ModApiBase
+{
+private:
+	static int l_sound_play(lua_State *L);
+	static int l_sound_stop(lua_State *L);
+public:
+	static void Initialize(lua_State *L, int top);
+};
+
+#endif
diff --git a/src/script/lua_api/l_util.cpp b/src/script/lua_api/l_util.cpp
index 277a874bf..b9c334121 100644
--- a/src/script/lua_api/l_util.cpp
+++ b/src/script/lua_api/l_util.cpp
@@ -530,6 +530,8 @@ void ModApiUtil::InitializeClient(lua_State *L, int top)
 {
 	API_FCT(log);
 
+	API_FCT(get_us_time);
+
 	API_FCT(setting_set);
 	API_FCT(setting_get);
 	API_FCT(setting_setbool);