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livetrax/libs/surfaces/mackie/mackie_port.cc

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/*
Copyright (C) 2006,2007 John Anderson
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "mackie_port.h"
#include "mackie_control_exception.h"
#include "mackie_control_protocol.h"
#include "mackie_midi_builder.h"
#include "controls.h"
#include "surface.h"
#include <glibmm/main.h>
#include <boost/shared_array.hpp>
#include "midi++/types.h"
#include "midi++/port.h"
#include "ardour/debug.h"
#include "ardour/rc_configuration.h"
#include "i18n.h"
#include <sstream>
using namespace std;
using namespace Mackie;
using namespace ARDOUR;
using namespace PBD;
// The MCU sysex header
MidiByteArray mackie_sysex_hdr ( 5, MIDI::sysex, 0x0, 0x0, 0x66, 0x10 );
// The MCU extender sysex header
MidiByteArray mackie_sysex_hdr_xt ( 5, MIDI::sysex, 0x0, 0x0, 0x66, 0x11 );
MackiePort::MackiePort (MackieControlProtocol & mcp, MIDI::Port & input_port, MIDI::Port & output_port, int number, port_type_t port_type)
: SurfacePort (input_port, output_port, number)
, _mcp( mcp )
, _port_type( port_type )
, _emulation( none )
, _initialising( true )
{
DEBUG_TRACE (DEBUG::MackieControl, "MackiePort::MackiePort\n");
}
MackiePort::~MackiePort()
{
DEBUG_TRACE (DEBUG::MackieControl, "MackiePort::~MackiePort\n");
close();
DEBUG_TRACE (DEBUG::MackieControl, "~MackiePort finished\n");
}
int MackiePort::strips() const
{
if ( _port_type == mcu )
{
switch ( _emulation )
{
// BCF2000 only has 8 faders, so reserve one for master
case bcf2000: return 7;
case mackie: return 8;
case none:
default:
throw MackieControlException( "MackiePort::strips: don't know what emulation we're using" );
}
}
else
{
// must be an extender, ie no master fader
return 8;
}
}
// should really be in MackiePort
void MackiePort::open()
{
DEBUG_TRACE (DEBUG::MackieControl, string_compose ("MackiePort::open %1\n", *this));
input_port().parser()->sysex.connect_same_thread (sysex_connection, boost::bind (&MackiePort::handle_midi_sysex, this, _1, _2, _3));
// make sure the device is connected
init();
}
void MackiePort::close()
{
DEBUG_TRACE (DEBUG::MackieControl, "MackiePort::close\n");
// disconnect signals
any_connection.disconnect();
sysex_connection.disconnect();
// TODO emit a "closing" signal?
}
const MidiByteArray & MackiePort::sysex_hdr() const
{
switch ( _port_type )
{
case mcu: return mackie_sysex_hdr;
case ext: return mackie_sysex_hdr_xt;
}
cout << "MackiePort::sysex_hdr _port_type not known" << endl;
return mackie_sysex_hdr;
}
MidiByteArray calculate_challenge_response( MidiByteArray::iterator begin, MidiByteArray::iterator end )
{
MidiByteArray l;
back_insert_iterator<MidiByteArray> back ( l );
copy( begin, end, back );
MidiByteArray retval;
// this is how to calculate the response to the challenge.
// from the Logic docs.
retval << ( 0x7f & ( l[0] + ( l[1] ^ 0xa ) - l[3] ) );
retval << ( 0x7f & ( ( l[2] >> l[3] ) ^ ( l[0] + l[3] ) ) );
retval << ( 0x7f & ( (l[3] - ( l[2] << 2 )) ^ ( l[0] | l[1] ) ) );
retval << ( 0x7f & ( l[1] - l[2] + ( 0xf0 ^ ( l[3] << 4 ) ) ) );
return retval;
}
// not used right now
MidiByteArray MackiePort::host_connection_query( MidiByteArray & bytes )
{
// handle host connection query
DEBUG_TRACE (DEBUG::MackieControl, string_compose ("host connection query: %1\n", bytes));
if ( bytes.size() != 18 )
{
finalise_init( false );
ostringstream os;
os << "expecting 18 bytes, read " << bytes << " from " << input_port().name();
throw MackieControlException( os.str() );
}
// build and send host connection reply
MidiByteArray response;
response << 0x02;
copy( bytes.begin() + 6, bytes.begin() + 6 + 7, back_inserter( response ) );
response << calculate_challenge_response( bytes.begin() + 6 + 7, bytes.begin() + 6 + 7 + 4 );
return response;
}
// not used right now
MidiByteArray MackiePort::host_connection_confirmation( const MidiByteArray & bytes )
{
DEBUG_TRACE (DEBUG::MackieControl, string_compose ("host_connection_confirmation: %1\n", bytes));
// decode host connection confirmation
if ( bytes.size() != 14 )
{
finalise_init( false );
ostringstream os;
os << "expecting 14 bytes, read " << bytes << " from " << input_port().name();
throw MackieControlException( os.str() );
}
// send version request
return MidiByteArray( 2, 0x13, 0x00 );
}
void MackiePort::probe_emulation (const MidiByteArray &)
{
#if 0
cout << "MackiePort::probe_emulation: " << bytes.size() << ", " << bytes << endl;
MidiByteArray version_string;
for ( int i = 6; i < 11; ++i ) version_string << bytes[i];
cout << "version_string: " << version_string << endl;
#endif
// TODO investigate using serial number. Also, possibly size of bytes might
// give an indication. Also, apparently MCU sends non-documented messages
// sometimes.
if (!_initialising)
{
//cout << "MackiePort::probe_emulation out of sequence." << endl;
return;
}
finalise_init( true );
}
void MackiePort::init()
{
DEBUG_TRACE (DEBUG::MackieControl, "MackiePort::init\n");
init_mutex.lock();
_initialising = true;
DEBUG_TRACE (DEBUG::MackieControl, "MackiePort::init lock acquired\n");
// emit pre-init signal
init_event();
// kick off initialisation. See docs in header file for init()
// bypass the init sequence because sometimes the first
// message doesn't get to the unit, and there's no way
// to do a timed lock in Glib.
//write_sysex ( MidiByteArray ( 2, 0x13, 0x00 ) );
finalise_init( true );
}
void MackiePort::finalise_init( bool yn )
{
DEBUG_TRACE (DEBUG::MackieControl, "MackiePort::finalise_init\n");
bool emulation_ok = false;
// probing doesn't work very well, so just use a config variable
// to set the emulation mode
// TODO This might have to be specified on a per-port basis
// in the config file
// if an mcu and a bcf are needed to work as one surface
if ( _emulation == none )
{
// TODO same as code in mackie_control_protocol.cc
if ( ARDOUR::Config->get_mackie_emulation() == "bcf" )
{
_emulation = bcf2000;
emulation_ok = true;
}
else if ( ARDOUR::Config->get_mackie_emulation() == "mcu" )
{
_emulation = mackie;
emulation_ok = true;
}
else
{
cout << "unknown mackie emulation: " << ARDOUR::Config->get_mackie_emulation() << endl;
emulation_ok = false;
}
}
yn = yn && emulation_ok;
SurfacePort::active( yn );
if (yn) {
active_event();
// start handling messages from controls
connect_any();
}
_initialising = false;
init_cond.signal();
init_mutex.unlock();
DEBUG_TRACE (DEBUG::MackieControl, "MackiePort::finalise_init lock released\n");
}
void MackiePort::connect_any()
{
if (!any_connection.connected()) {
input_port().parser()->any.connect_same_thread (any_connection, boost::bind (&MackiePort::handle_midi_any, this, _1, _2, _3));
}
}
bool MackiePort::wait_for_init()
{
Glib::Mutex::Lock lock( init_mutex );
while (_initialising) {
DEBUG_TRACE (DEBUG::MackieControl, "MackiePort::wait_for_active waiting\n");
init_cond.wait( init_mutex );
DEBUG_TRACE (DEBUG::MackieControl, "MackiePort::wait_for_active released\n");
}
DEBUG_TRACE (DEBUG::MackieControl, "MackiePort::wait_for_active returning\n");
return SurfacePort::active();
}
void MackiePort::handle_midi_sysex (MIDI::Parser &, MIDI::byte * raw_bytes, size_t count )
{
MidiByteArray bytes( count, raw_bytes );
DEBUG_TRACE (DEBUG::MackieControl, string_compose ("handle_midi_sysex: %1\n", bytes));
switch( bytes[5] )
{
case 0x01:
// not used right now
write_sysex (host_connection_query (bytes));
break;
case 0x03:
// not used right now
write_sysex (host_connection_confirmation (bytes));
break;
case 0x04:
inactive_event ();
cout << "host connection error" << bytes << endl;
break;
case 0x14:
probe_emulation (bytes);
break;
default:
cout << "unknown sysex: " << bytes << endl;
}
}
Control & MackiePort::lookup_control( MIDI::byte * bytes, size_t count )
{
// Don't instantiate a MidiByteArray here unless it's needed for exceptions.
// Reason being that this method is called for every single incoming
// midi event, and it needs to be as efficient as possible.
Control * control = 0;
MIDI::byte midi_type = bytes[0] & 0xf0; //0b11110000
switch (midi_type) {
// fader
case MackieMidiBuilder::midi_fader_id:
{
int midi_id = bytes[0] & 0x0f;
control = _mcp.surface().faders[midi_id];
if ( control == 0 )
{
MidiByteArray mba( count, bytes );
ostringstream os;
os << "control for fader" << bytes << " id " << midi_id << " is null";
throw MackieControlException( os.str() );
}
break;
}
// button
case MackieMidiBuilder::midi_button_id:
control = _mcp.surface().buttons[bytes[1]];
if ( control == 0 )
{
MidiByteArray mba( count, bytes );
ostringstream os;
os << "control for button " << bytes << " is null";
throw MackieControlException( os.str() );
}
break;
// pot (jog wheel, external control)
case MackieMidiBuilder::midi_pot_id:
control = _mcp.surface().pots[bytes[1]];
if ( control == 0 )
{
MidiByteArray mba( count, bytes );
ostringstream os;
os << "control for rotary " << mba << " is null";
throw MackieControlException( os.str() );
}
break;
default:
MidiByteArray mba( count, bytes );
ostringstream os;
os << "Cannot find control for " << bytes;
throw MackieControlException( os.str() );
}
return *control;
}
bool MackiePort::handle_control_timeout_event ( Control * control )
{
// empty control_state
ControlState control_state;
control->in_use( false );
control_event( *this, *control, control_state );
// only call this method once from the timer
return false;
}
// converts midi messages into control_event signals
// it might be worth combining this with lookup_control
// because they have similar logic flows.
void MackiePort::handle_midi_any (MIDI::Parser &, MIDI::byte * raw_bytes, size_t count )
{
MidiByteArray bytes( count, raw_bytes );
DEBUG_TRACE (DEBUG::MackieControl, string_compose ("MackiePort::handle_midi_any %1\n", bytes));
try
{
// ignore sysex messages
if ( raw_bytes[0] == MIDI::sysex ) return;
// sanity checking
if (count != 3) {
ostringstream os;
MidiByteArray mba( count, raw_bytes );
os << "MackiePort::handle_midi_any needs 3 bytes, but received " << mba;
throw MackieControlException( os.str() );
}
Control & control = lookup_control( raw_bytes, count );
control.in_use( true );
// This handles incoming bytes. Outgoing bytes
// are sent by the signal handlers.
switch (control.type()) {
// fader
case Control::type_fader:
{
// only the top-order 10 bits out of 14 are used
int midi_pos = ( ( raw_bytes[2] << 7 ) + raw_bytes[1] ) >> 4;
// in_use is set by the MackieControlProtocol::handle_strip_button
// relies on implicit ControlState constructor
control_event( *this, control, float(midi_pos) / float(0x3ff) );
}
break;
// button
case Control::type_button:
{
ControlState control_state( raw_bytes[2] == 0x7f ? press : release );
control.in_use( control_state.button_state == press );
control_event( *this, control, control_state );
break;
}
// pot (jog wheel, external control)
case Control::type_pot:
{
ControlState state;
// bytes[2] & 0b01000000 (0x40) give sign
state.sign = ( raw_bytes[2] & 0x40 ) == 0 ? 1 : -1;
// bytes[2] & 0b00111111 (0x3f) gives delta
state.ticks = ( raw_bytes[2] & 0x3f);
state.delta = float( state.ticks ) / float( 0x3f );
/*
Pots only emit events when they move, not when they
stop moving. So to get a stop event, we need to use a timeout.
*/
// this is set to false ...
control.in_use( true );
// ... by this timeout
// first disconnect any previous timeouts
control.in_use_connection.disconnect();
// now connect a new timeout to call handle_control_timeout_event
// XXX should this use the GUI event loop (default) or the
// MIDI UI event loop ?
sigc::slot<bool> timeout_slot = sigc::bind
(sigc::mem_fun( *this, &MackiePort::handle_control_timeout_event), &control);
control.in_use_connection = Glib::signal_timeout().connect (timeout_slot , control.in_use_timeout());
// emit the control event
control_event( *this, control, state );
break;
}
default:
cerr << "Do not understand control type " << control;
}
}
catch( MackieControlException & e ) {
MidiByteArray bytes( count, raw_bytes );
cout << bytes << ' ' << e.what() << endl;
}
DEBUG_TRACE (DEBUG::MackieControl, string_compose ("finished MackiePort::handle_midi_any %1\n", bytes));
}