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/*
Copyright (C) 1998-2010 Paul Barton-Davis
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.
*/
#ifndef __libmidi_port_h__
#define __libmidi_port_h__
#include <string>
#include <iostream>
#include <jack/types.h>
#include "pbd/xml++.h"
#include "pbd/crossthread.h"
#include "pbd/signals.h"
#include "pbd/ringbuffer.h"
#include "evoral/Event.hpp"
#include "evoral/EventRingBuffer.hpp"
#include "midi++/types.h"
#include "midi++/parser.h"
namespace MIDI {
class Channel;
class PortRequest;
class Port {
public:
enum Flags {
IsInput = JackPortIsInput,
IsOutput = JackPortIsOutput,
};
Port (std::string const &, Flags, jack_client_t *);
Port (const XMLNode&, jack_client_t *);
~Port ();
XMLNode& get_state () const;
void set_state (const XMLNode&);
// FIXME: make Manager a friend of port so these can be hidden?
/* Only for use by MidiManager. Don't ever call this. */
void cycle_start (pframes_t nframes);
/* Only for use by MidiManager. Don't ever call this. */
void cycle_end ();
/** Write a message to port.
* @param msg Raw MIDI message to send
* @param msglen Size of @a msg
* @param timestamp Time stamp in frames of this message (relative to cycle start)
* @return number of bytes successfully written
*/
int write (byte *msg, size_t msglen, timestamp_t timestamp);
/** Read raw bytes from a port.
* @param buf memory to store read data in
* @param bufsize size of @a buf
* @return number of bytes successfully read, negative if error
*/
int read (byte *buf, size_t bufsize);
void parse (framecnt_t timestamp);
/** Write a message to port.
* @return true on success.
* FIXME: describe semantics here
*/
int midimsg (byte *msg, size_t len, timestamp_t timestamp) {
return !(write (msg, len, timestamp) == (int) len);
}
bool clock (timestamp_t timestamp);
/* select(2)/poll(2)-based I/O */
/** Get the file descriptor for port.
* @return File descriptor, or -1 if not selectable.
*/
int selectable () const {
return xthread.selectable();
}
Channel *channel (channel_t chn) {
return _channel[chn&0x7F];
}
Parser* parser () {
return _parser;
}
const char *name () const { return _tagname.c_str(); }
bool ok () const { return _ok; }
bool receives_input () const {
return _flags == IsInput;
}
bool sends_output () const {
return _flags == IsOutput;
}
struct Descriptor {
std::string tag;
Flags flags;
Descriptor (const XMLNode&);
XMLNode& get_state();
};
pframes_t nframes_this_cycle() const { return _nframes_this_cycle; }
void reestablish (jack_client_t *);
void reconnect ();
static void set_process_thread (pthread_t);
static pthread_t get_process_thread () { return _process_thread; }
static bool is_process_thread();
static std::string state_node_name;
static PBD::Signal0<void> MakeConnections;
static PBD::Signal0<void> JackHalted;
private:
bool _ok;
bool _currently_in_cycle;
pframes_t _nframes_this_cycle;
std::string _tagname;
size_t _number;
Channel *_channel[16];
Parser *_parser;
int create_port ();
jack_client_t* _jack_client;
jack_port_t* _jack_port;
framecnt_t _last_read_index;
timestamp_t _last_write_timestamp;
/** Channel used to signal to the MidiControlUI that input has arrived */
CrossThreadChannel xthread;
std::string _connections;
PBD::ScopedConnection connect_connection;
PBD::ScopedConnection halt_connection;
void flush (void* jack_port_buffer);
void jack_halted ();
void make_connections ();
void init (std::string const &, Flags);
static pthread_t _process_thread;
RingBuffer< Evoral::Event<double> > output_fifo;
Evoral::EventRingBuffer<timestamp_t> input_fifo;
Glib::Mutex output_fifo_lock;
Flags _flags;
};
struct PortSet {
PortSet (std::string str) : owner (str) { }
std::string owner;
std::list<XMLNode> ports;
};
std::ostream & operator << ( std::ostream & os, const Port & port );
} // namespace MIDI
#endif // __libmidi_port_h__
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