ardour/livetrax
13
0
Fork 0
Code

prototype lua midi generators & filters and port event-rewrite

Browse Source
This commit is contained in:
Robin Gareus 2016-05-29 20:36:16 +02:00
parent 60200bf923
commit 39e818a03a
6 changed files with 218 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
libs/ardour/luabindings.cc
View File

@ -171,6 +171,7 @@ CLASSKEYS(boost::weak_ptr<ARDOUR::Route>);
CLASSKEYS(std::list<boost::shared_ptr<ARDOUR::Region> >);
CLASSKEYS(std::list<ARDOUR::AudioRange>);
CLASSKEYS(Evoral::Beats);
CLASSKEYS(ARDOUR::PortEngine);
CLASSKEYS(ARDOUR::PortManager);
CLASSKEYS(ARDOUR::AudioEngine);
CLASSKEYS(void);
@ -459,6 +460,8 @@ LuaBindings::common (lua_State* L)
.endClass ()
.beginWSPtrClass <Port> ("Port")
.addCast<MidiPort> ("to_midiport")
.addCast<AudioPort> ("to_audioport")
.addFunction ("name", &Port::name)
.addFunction ("pretty_name", &Port::pretty_name)
.addFunction ("receives_input", &Port::receives_input)
@ -471,6 +474,7 @@ LuaBindings::common (lua_State* L)
.addFunction ("connected_to", (bool (Port::*)(Port*)const)&Port::connected_to)
.addFunction ("connect", (int (Port::*)(Port*))&Port::connect)
.addFunction ("disconnect", (int (Port::*)(Port*))&Port::disconnect)
//.addStaticFunction ("port_offset", &Port::port_offset) // static
.endClass ()
.deriveWSPtrClass <AudioPort, Port> ("AudioPort")
@ -479,6 +483,7 @@ LuaBindings::common (lua_State* L)
.deriveWSPtrClass <MidiPort, Port> ("MidiPort")
.addFunction ("input_active", &MidiPort::input_active)
.addFunction ("set_input_active", &MidiPort::set_input_active)
.addFunction ("get_midi_buffer", &MidiPort::get_midi_buffer) // DSP only
.endClass ()
.beginWSPtrClass <PortSet> ("PortSet")
@ -956,6 +961,9 @@ LuaBindings::common (lua_State* L)
.addFunction ("set_output_device_name", &AudioBackend::set_output_device_name)
.endClass()
.beginClass <PortEngine> ("PortEngine")
.endClass()
.beginClass <PortManager> ("PortManager")
.addFunction ("port_engine", &PortManager::port_engine)
.addFunction ("connected", &PortManager::connected)
@ -1107,8 +1115,10 @@ LuaBindings::dsp (lua_State* L)
.beginClass <MidiBuffer> ("MidiBuffer")
.addEqualCheck ()
.addFunction ("silence", &MidiBuffer::silence)
.addFunction ("empty", &MidiBuffer::empty)
.addFunction ("push_event", (bool (MidiBuffer::*)(const Evoral::MIDIEvent<framepos_t>&))&MidiBuffer::push_back)
.addFunction ("push_back", (bool (MidiBuffer::*)(framepos_t, size_t, const uint8_t*))&MidiBuffer::push_back)
// TODO iterators..
.addExtCFunction ("table", &luabridge::CFunc::listToTable<const Evoral::MIDIEvent<framepos_t>, MidiBuffer>)
.endClass()
.beginClass <BufferSet> ("BufferSet")
@ -1135,8 +1145,8 @@ LuaBindings::dsp (lua_State* L)
// add Ctor?
.addFunction ("type", &Evoral::MIDIEvent<framepos_t>::type)
.addFunction ("channel", &Evoral::MIDIEvent<framepos_t>::channel)
.addFunction ("set_type", &Evoral::MIDIEvent<framepos_t>::type)
.addFunction ("set_channel", &Evoral::MIDIEvent<framepos_t>::channel)
.addFunction ("set_type", &Evoral::MIDIEvent<framepos_t>::set_type)
.addFunction ("set_channel", &Evoral::MIDIEvent<framepos_t>::set_channel)
.endClass ()
.endNamespace ();

83
libs/ardour/luaproc.cc
View File

@ -212,15 +212,24 @@ LuaProc::load_script ()
}
}
luabridge::LuaRef lua_dsp_midi_in = luabridge::getGlobal (L, "dsp_midi_input");
if (lua_dsp_midi_in.type () == LUA_TFUNCTION) {
// query midi i/o
luabridge::LuaRef lua_dsp_has_midi_in = luabridge::getGlobal (L, "dsp_has_midi_input");
if (lua_dsp_has_midi_in.type () == LUA_TFUNCTION) {
try {
_has_midi_input = lua_dsp_midi_in ();
_has_midi_input = lua_dsp_has_midi_in ();
} catch (luabridge::LuaException const& e) {
;
}
}
luabridge::LuaRef lua_dsp_has_midi_out = luabridge::getGlobal (L, "dsp_has_midi_output");
if (lua_dsp_has_midi_out.type () == LUA_TFUNCTION) {
try {
_has_midi_output = lua_dsp_has_midi_out ();
} catch (luabridge::LuaException const& e) {
;
}
}
lpi->_is_instrument = _has_midi_input;
_ctrl_params.clear ();
@ -352,10 +361,10 @@ LuaProc::can_support_io_configuration (const ChanCount& in, ChanCount& out, Chan
bool found = false;
bool exact_match = false;
const int32_t audio_in = in.n_audio ();
int32_t midi_out = 0; // TODO handle _has_midi_output
int32_t midi_out = _has_midi_output ? 1 : 0;
// preferred setting (provided by plugin_insert)
assert (out.n_audio () > 0);
assert (out.n_audio () > 0 || midi_out > 0);
const int preferred_out = out.n_audio ();
for (luabridge::Iterator i (iotable); !i.isNil (); ++i) {
@ -406,8 +415,17 @@ LuaProc::can_support_io_configuration (const ChanCount& in, ChanCount& out, Chan
int possible_out = io["audio_out"];
if (possible_out == 0) {
if (possible_in == 0) {
if (_has_midi_output && audio_in == 0) {
// special case midi filters & generators
audio_out = 0;
found = true;
break;
}
}
continue;
}
if (possible_in == 0) {
/* no inputs, generators & instruments */
if (possible_out == -1) {
@ -527,6 +545,15 @@ LuaProc::can_support_io_configuration (const ChanCount& in, ChanCount& out, Chan
int possible_in = io["audio_in"];
int possible_out = io["audio_out"];
if (possible_out == 0 && possible_in == 0 && _has_midi_output) {
assert (audio_in > 0); // no input is handled above
// TODO hide audio input from plugin
imprecise->set (DataType::AUDIO, 0);
audio_out = 0;
found = true;
continue;
}
assert (possible_in > 0); // all other cases will have been matched above
assert (possible_out !=0 || possible_in !=0); // already handled above
@ -550,10 +577,10 @@ LuaProc::can_support_io_configuration (const ChanCount& in, ChanCount& out, Chan
}
if (exact_match) {
out.set (DataType::MIDI, midi_out); // currently always zero
out.set (DataType::MIDI, midi_out);
out.set (DataType::AUDIO, preferred_out);
} else {
out.set (DataType::MIDI, midi_out); // currently always zero
out.set (DataType::MIDI, midi_out);
out.set (DataType::AUDIO, audio_out);
}
return true;
@ -651,7 +678,7 @@ LuaProc::connect_and_run (BufferSet& bufs,
}
}
luabridge::LuaRef lua_midi_tbl (luabridge::newTable (L));
luabridge::LuaRef lua_midi_src_tbl (luabridge::newTable (L));
int e = 1; // > 1 port, we merge events (unsorted)
for (uint32_t mp = 0; mp < midi_in; ++mp) {
bool valid;
@ -668,20 +695,52 @@ LuaProc::connect_and_run (BufferSet& bufs,
luabridge::LuaRef lua_midi_event (luabridge::newTable (L));
lua_midi_event["time"] = 1 + (*m).time();
lua_midi_event["data"] = lua_midi_data;
lua_midi_tbl[e] = lua_midi_event;
lua_midi_src_tbl[e] = lua_midi_event;
}
}
}
if (_has_midi_input) {
// XXX TODO This needs a better solution than global namespace
luabridge::push (L, lua_midi_tbl);
lua_setglobal (L, "mididata");
luabridge::push (L, lua_midi_src_tbl);
lua_setglobal (L, "midiin");
}
luabridge::LuaRef lua_midi_sink_tbl (luabridge::newTable (L));
if (_has_midi_output) {
luabridge::push (L, lua_midi_sink_tbl);
lua_setglobal (L, "midiout");
}
// run the DSP function
(*_lua_dsp)(in_map, out_map, nframes);
// copy back midi events
if (_has_midi_output && lua_midi_sink_tbl.isTable ()) {
bool valid;
const uint32_t idx = out.get(DataType::MIDI, 0, &valid);
if (valid && bufs.count().n_midi() > idx) {
MidiBuffer& mbuf = bufs.get_midi(idx);
mbuf.silence(0, 0);
for (luabridge::Iterator i (lua_midi_sink_tbl); !i.isNil (); ++i) {
if (!i.key ().isNumber ()) { continue; }
if (!i.value ()["time"].isNumber ()) { continue; }
if (!i.value ()["data"].isTable ()) { continue; }
luabridge::LuaRef data_tbl (i.value ()["data"]);
framepos_t tme = i.value ()["time"];
if (tme < 1 || tme > nframes) { continue; }
uint8_t data[64];
size_t size = 0;
for (luabridge::Iterator di (data_tbl); !di.isNil () && size < sizeof(data); ++di, ++size) {
data[size] = di.value ();
}
if (size > 0 && size < 64) {
mbuf.push_back(tme - 1, size, data);
}
}
}
}
}
} catch (luabridge::LuaException const& e) {
PBD::error << "LuaException: " << e.what () << "\n";

36
scripts/midi_rewite.lua Normal file
View File

@ -0,0 +1,36 @@
ardour {
["type"] = "session",
name = "Rewrite Midi",
license = "MIT",
author = "Robin Gareus",
email = "robin@gareus.org",
site = "http://gareus.org",
description = [[An example session script preprocesses midi buffers.]]
}
function factory ()
-- this function is called in every process cycle, before processing
return function (n_samples)
_, t = Session:engine ():get_ports (ARDOUR.DataType.midi (), ARDOUR.PortList ())
for p in t[2]:iter () do
if not p:receives_input () then goto next end
if not p:name () == "MIDI/midi_in 1" then goto next end
midiport = p:to_midiport ()
assert (not midiport:isnil ())
mb = midiport:get_midi_buffer (n_samples);
events = mb:table() -- copy event list into lua table
mb:silence (n_samples, 0); -- clear existing buffer
for _,e in pairs (events) do
-- e is an http://ardourman/lua-scripting/class_reference/#Evoral:MidiEvent
e:set_channel (2)
mb:push_event (e)
end
::next::
end
end
end

43
scripts/midifilter.lua Normal file
View File

@ -0,0 +1,43 @@
ardour {
["type"] = "dsp",
name = "Midi Filter",
category = "Utility",
license = "MIT",
author = "Robin Gareus",
email = "robin@gareus.org",
site = "http://gareus.org",
description = [[An Example Midi Filter for prototyping.]]
}
function dsp_ioconfig ()
return { { audio_in = 0, audio_out = 0}, }
end
function dsp_has_midi_input () return true end
function dsp_has_midi_output () return true end
function dsp_run (_, _, n_samples)
assert (type(midiin) == "table")
assert (type(midiout) == "table")
local cnt = 1;
function tx_midi (time, data)
midiout[cnt] = {}
midiout[cnt]["time"] = time;
midiout[cnt]["data"] = data;
cnt = cnt + 1;
end
-- for each incoming midi event
for _,b in pairs (midiin) do
local t = b["time"] -- t = [ 1 .. n_samples ]
local d = b["data"] -- get midi-event
if (#d == 3 and bit32.band (d[1], 240) == 144) then -- note on
tx_midi (t, d)
end
if (#d == 3 and bit32.band (d[1], 240) == 128) then -- note off
tx_midi (t, d)
end
end
end

52
scripts/midigenerator.lua Normal file
View File

@ -0,0 +1,52 @@
ardour {
["type"] = "dsp",
name = "Midi Generator",
category = "Utility",
license = "MIT",
author = "Robin Gareus",
email = "robin@gareus.org",
site = "http://gareus.org",
description = [[An Example Midi Generator for prototyping.]]
}
function dsp_ioconfig ()
return { { audio_in = 0, audio_out = 0}, }
end
function dsp_has_midi_output () return true end
local tme = 0 -- sample-counter
local seq = 1 -- sequence-step
local spb = 0 -- samples per beat
local midi_sequence = {
{ 0x90, 64, 127 },
{ 0x80, 64, 0 },
}
function dsp_init (rate)
local bpm = 120
spb = rate * 60 / bpm
if spb < 2 then spb = 2 end
end
function dsp_run (_, _, n_samples)
assert (type(midiout) == "table")
assert (spb > 1)
local m = 1
for time = 1,n_samples do -- not very efficient
-- TODO, timestamp the sequence in beats, calc/skip to next event
tme = tme + 1
if tme >= spb then
midiout[m] = {}
midiout[m]["time"] = time
midiout[m]["data"] = midi_sequence[seq]
tme = 0
m = m + 1
if seq == #midi_sequence then seq = 1 else seq = seq + 1 end
end
end
end

6
scripts/synth1.lua
View File

@ -21,7 +21,7 @@ function dsp_ioconfig ()
}
end
function dsp_midi_input ()
function dsp_has_midi_input ()
return true
end
@ -70,8 +70,8 @@ function dsp_run (ins, outs, n_samples)
local tme = 1
-- parse midi messages
assert (type(mididata) == "table") -- global table of midi events (for now)
for _,b in pairs (mididata) do
assert (type(midiin) == "table") -- global table of midi events (for now)
for _,b in pairs (midiin) do
local t = b["time"] -- t = [ 1 .. n_samples ]
-- synth sound until event