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-rw-r--r--libs/ardour/session.cc242
1 files changed, 241 insertions, 1 deletions
diff --git a/libs/ardour/session.cc b/libs/ardour/session.cc
index c9fd336314..3509ee19a5 100644
--- a/libs/ardour/session.cc
+++ b/libs/ardour/session.cc
@@ -73,6 +73,7 @@
#include "ardour/filename_extensions.h"
#include "ardour/gain_control.h"
#include "ardour/graph.h"
+#include "ardour/luabindings.h"
#include "ardour/midiport_manager.h"
#include "ardour/scene_changer.h"
#include "ardour/midi_patch_manager.h"
@@ -106,6 +107,8 @@
#include "midi++/port.h"
#include "midi++/mmc.h"
+#include "LuaBridge/LuaBridge.h"
+
#include "i18n.h"
#include <glibmm/checksum.h>
@@ -227,6 +230,8 @@ Session::Session (AudioEngine &eng,
, pending_locate_flush (false)
, pending_abort (false)
, pending_auto_loop (false)
+ , _mempool ("Session", 1048576)
+ , lua (lua_newstate (&PBD::ReallocPool::lalloc, &_mempool))
, _butler (new Butler (*this))
, _post_transport_work (0)
, cumulative_rf_motion (0)
@@ -307,6 +312,8 @@ Session::Session (AudioEngine &eng,
pre_engine_init (fullpath);
+ setup_lua ();
+
if (_is_new) {
Stateful::loading_state_version = CURRENT_SESSION_FILE_VERSION;
@@ -590,8 +597,19 @@ Session::destroy ()
delete state_tree;
state_tree = 0;
- /* reset dynamic state version back to default */
+ // unregister all lua functions, drop held references (if any)
+ (*_lua_cleanup)();
+ lua.do_command ("Session = nil");
+ delete _lua_run;
+ delete _lua_add;
+ delete _lua_del;
+ delete _lua_list;
+ delete _lua_save;
+ delete _lua_load;
+ delete _lua_cleanup;
+ lua.collect_garbage ();
+ /* reset dynamic state version back to default */
Stateful::loading_state_version = 0;
_butler->drop_references ();
@@ -4896,6 +4914,228 @@ Session::audition_playlist ()
queue_event (ev);
}
+
+void
+Session::register_lua_function (
+ const std::string& name,
+ const std::string& script,
+ const LuaScriptParamList& args
+ )
+{
+ Glib::Threads::Mutex::Lock lm (lua_lock);
+
+ lua_State* L = lua.getState();
+
+ const std::string& bytecode = LuaScripting::get_factory_bytecode (script);
+ luabridge::LuaRef tbl_arg (luabridge::newTable(L));
+ for (LuaScriptParamList::const_iterator i = args.begin(); i != args.end(); ++i) {
+ if ((*i)->optional && !(*i)->is_set) { continue; }
+ tbl_arg[(*i)->name] = (*i)->value;
+ }
+ (*_lua_add)(name, bytecode, tbl_arg); // throws luabridge::LuaException
+ set_dirty();
+}
+
+void
+Session::unregister_lua_function (const std::string& name)
+{
+ Glib::Threads::Mutex::Lock lm (lua_lock);
+ (*_lua_del)(name); // throws luabridge::LuaException
+ lua.collect_garbage ();
+ set_dirty();
+}
+
+std::vector<std::string>
+Session::registered_lua_functions ()
+{
+ Glib::Threads::Mutex::Lock lm (lua_lock);
+ std::vector<std::string> rv;
+
+ try {
+ luabridge::LuaRef list ((*_lua_list)());
+ for (luabridge::Iterator i (list); !i.isNil (); ++i) {
+ if (!i.key ().isString ()) { assert(0); continue; }
+ rv.push_back (i.key ().cast<std::string> ());
+ }
+ } catch (luabridge::LuaException const& e) { }
+ return rv;
+}
+
+#ifndef NDEBUG
+static void _lua_print (std::string s) {
+ std::cout << "SessionLua: " << s << "\n";
+}
+#endif
+
+void
+Session::try_run_lua (pframes_t nframes)
+{
+ if (_n_lua_scripts == 0) return;
+ Glib::Threads::Mutex::Lock tm (lua_lock, Glib::Threads::TRY_LOCK);
+ if (tm.locked ()) {
+ try { (*_lua_run)(nframes); } catch (luabridge::LuaException const& e) { }
+ }
+}
+
+void
+Session::setup_lua ()
+{
+#ifndef NDEBUG
+ lua.Print.connect (&_lua_print);
+#endif
+ lua.do_command (
+ "function ArdourSession ()"
+ " local self = { scripts = {}, instances = {} }"
+ ""
+ " local remove = function (n)"
+ " self.scripts[n] = nil"
+ " self.instances[n] = nil"
+ " Session:scripts_changed()" // call back
+ " end"
+ ""
+ " local addinternal = function (n, f, a)"
+ " assert(type(n) == 'string', 'function-name must be string')"
+ " assert(type(f) == 'function', 'Given script is a not a function')"
+ " assert(type(a) == 'table' or type(a) == 'nil', 'Given argument is invalid')"
+ " assert(self.scripts[n] == nil, 'Callback \"'.. n ..'\" already exists.')"
+ " self.scripts[n] = { ['f'] = f, ['a'] = a }"
+ " local env = _ENV; env.f = nil env.io = nil env.os = nil env.loadfile = nil env.require = nil env.dofile = nil env.package = nil env.debug = nil"
+ " local env = { print = print, Session = Session, tostring = tostring, assert = assert, ipairs = ipairs, error = error, select = select, string = string, type = type, tonumber = tonumber, collectgarbage = collectgarbage, pairs = pairs, math = math, table = table, pcall = pcall }"
+ " self.instances[n] = load (string.dump(f, true), nil, nil, env)(a)"
+ " Session:scripts_changed()" // call back
+ " end"
+ ""
+ " local add = function (n, b, a)"
+ " assert(type(b) == 'string', 'ByteCode must be string')"
+ " load (b)()" // assigns f
+ " assert(type(f) == 'string', 'Assigned ByteCode must be string')"
+ " addinternal (n, load(f), a)"
+ " end"
+ ""
+ " local run = function (...)"
+ " for n, s in pairs (self.instances) do"
+ " local status, err = pcall (s, ...)"
+ " if not status then"
+ " print ('fn \"'.. n .. '\": ', err)"
+ " remove (n)"
+ " end"
+ " end"
+ " collectgarbage()"
+ " end"
+ ""
+ " local cleanup = function ()"
+ " self.scripts = nil"
+ " self.instances = nil"
+ " end"
+ ""
+ " local list = function ()"
+ " local rv = {}"
+ " for n, _ in pairs (self.scripts) do"
+ " rv[n] = true"
+ " end"
+ " return rv"
+ " end"
+ ""
+ " local function basic_serialize (o)"
+ " if type(o) == \"number\" then"
+ " return tostring(o)"
+ " else"
+ " return string.format(\"%q\", o)"
+ " end"
+ " end"
+ ""
+ " local function serialize (name, value)"
+ " local rv = name .. ' = '"
+ " collectgarbage()"
+ " if type(value) == \"number\" or type(value) == \"string\" or type(value) == \"nil\" then"
+ " return rv .. basic_serialize(value) .. ' '"
+ " elseif type(value) == \"table\" then"
+ " rv = rv .. '{} '"
+ " for k,v in pairs(value) do"
+ " local fieldname = string.format(\"%s[%s]\", name, basic_serialize(k))"
+ " rv = rv .. serialize(fieldname, v) .. ' '"
+ " collectgarbage()" // string concatenation allocates a new string :(
+ " end"
+ " return rv;"
+ " elseif type(value) == \"function\" then"
+ " return rv .. string.format(\"%q\", string.dump(value, true))"
+ " else"
+ " error('cannot save a ' .. type(value))"
+ " end"
+ " end"
+ ""
+ ""
+ " local save = function ()"
+ " return (serialize('scripts', self.scripts))"
+ " end"
+ ""
+ " local restore = function (state)"
+ " self.scripts = {}"
+ " load (state)()"
+ " for n, s in pairs (scripts) do"
+ " addinternal (n, load(s['f']), s['a'])"
+ " end"
+ " end"
+ ""
+ " return { run = run, add = add, remove = remove,"
+ " list = list, restore = restore, save = save, cleanup = cleanup}"
+ " end"
+ " "
+ " sess = ArdourSession ()"
+ " ArdourSession = nil"
+ " "
+ "function ardour () end"
+ );
+
+ lua_State* L = lua.getState();
+
+ try {
+ luabridge::LuaRef lua_sess = luabridge::getGlobal (L, "sess");
+ lua.do_command ("sess = nil"); // hide it.
+ lua.do_command ("collectgarbage()");
+
+ _lua_run = new luabridge::LuaRef(lua_sess["run"]);
+ _lua_add = new luabridge::LuaRef(lua_sess["add"]);
+ _lua_del = new luabridge::LuaRef(lua_sess["remove"]);
+ _lua_list = new luabridge::LuaRef(lua_sess["list"]);
+ _lua_save = new luabridge::LuaRef(lua_sess["save"]);
+ _lua_load = new luabridge::LuaRef(lua_sess["restore"]);
+ _lua_cleanup = new luabridge::LuaRef(lua_sess["cleanup"]);
+ } catch (luabridge::LuaException const& e) {
+ fatal << string_compose (_("programming error: %1"),
+ X_("Failed to setup Lua interpreter"))
+ << endmsg;
+ abort(); /*NOTREACHED*/
+ }
+
+ LuaBindings::stddef (L);
+ LuaBindings::common (L);
+ LuaBindings::dsp (L);
+ luabridge::push <Session *> (L, this);
+ lua_setglobal (L, "Session");
+}
+
+void
+Session::scripts_changed ()
+{
+ assert (!lua_lock.trylock()); // must hold lua_lock
+
+ try {
+ luabridge::LuaRef list ((*_lua_list)());
+ int cnt = 0;
+ for (luabridge::Iterator i (list); !i.isNil (); ++i) {
+ if (!i.key ().isString ()) { assert(0); continue; }
+ ++cnt;
+ }
+ _n_lua_scripts = cnt;
+ } catch (luabridge::LuaException const& e) {
+ fatal << string_compose (_("programming error: %1"),
+ X_("Indexing Lua Session Scripts failed."))
+ << endmsg;
+ abort(); /*NOTREACHED*/
+ }
+}
+
void
Session::non_realtime_set_audition ()
{
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-13 22:13:43 +0000