git-svn-id: svn://localhost/ardour2/branches/3.0@6376 d708f5d6-7413-0410-9779-e7cbd77b26cf
194 lines
4.8 KiB
C++
194 lines
4.8 KiB
C++
/*
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Copyright (C) 1998-99 Paul Barton-Davis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef __libmidi_port_h__
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#define __libmidi_port_h__
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#include <string>
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#include <iostream>
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#include "pbd/xml++.h"
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#include "midi++/types.h"
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#include "midi++/parser.h"
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namespace MIDI {
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class Channel;
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class PortRequest;
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class Port {
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public:
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enum Type {
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Unknown,
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JACK_Midi,
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ALSA_RawMidi,
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ALSA_Sequencer,
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CoreMidi_MidiPort,
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Null,
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FIFO
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};
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Port (const XMLNode&);
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virtual ~Port ();
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virtual XMLNode& get_state () const;
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virtual void set_state (const XMLNode&);
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// FIXME: make Manager a friend of port so these can be hidden?
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/* Only for use by MidiManager. Don't ever call this. */
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virtual void cycle_start(nframes_t nframes);
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/* Only for use by MidiManager. Don't ever call this. */
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virtual void cycle_end();
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/** Write a message to port.
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* @param msg Raw MIDI message to send
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* @param msglen Size of @a msg
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* @param timestamp Time stamp in frames of this message (relative to cycle start)
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* @return number of bytes successfully written
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*/
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virtual int write (byte *msg, size_t msglen, timestamp_t timestamp) = 0;
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/** Read raw bytes from a port.
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* @param buf memory to store read data in
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* @param bufsize size of @a buf
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* @return number of bytes successfully read, negative if error
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*/
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virtual int read (byte *buf, size_t bufsize) = 0;
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void parse (nframes_t timestamp);
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/** Write a message to port.
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* @return true on success.
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* FIXME: describe semantics here
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*/
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int midimsg (byte *msg, size_t len, timestamp_t timestamp) {
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return !(write (msg, len, timestamp) == (int) len);
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}
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int three_byte_msg (byte a, byte b, byte c, timestamp_t timestamp) {
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byte msg[3];
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msg[0] = a;
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msg[1] = b;
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msg[2] = c;
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return !(write (msg, 3, timestamp) == 3);
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}
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bool clock (timestamp_t timestamp);
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/* slowdown i/o to a loop of single byte emissions
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interspersed with a busy loop of 10000 * this value.
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This may be ignored by a particular instance
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of this virtual class. See FD_MidiPort for an
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example of where it used.
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*/
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void set_slowdown (size_t n) { slowdown = n; }
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/* select(2)/poll(2)-based I/O */
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/** Get the file descriptor for port.
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* @return File descriptor, or -1 if not selectable.
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*/
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virtual int selectable() const = 0;
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virtual bool must_drain_selectable() const { return false; }
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static void gtk_read_callback (void *ptr, int fd, int cond);
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static void write_callback (byte *msg, unsigned int len, void *);
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Channel *channel (channel_t chn) {
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return _channel[chn&0x7F];
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}
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Parser *input() { return input_parser; }
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Parser *output() { return output_parser; }
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void iostat (int *written, int *read,
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const size_t **in_counts,
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const size_t **out_counts) {
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*written = bytes_written;
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*read = bytes_read;
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if (input_parser) {
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*in_counts = input_parser->message_counts();
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} else {
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*in_counts = 0;
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}
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if (output_parser) {
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*out_counts = output_parser->message_counts();
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} else {
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*out_counts = 0;
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}
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}
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const char *device () const { return _devname.c_str(); }
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const char *name () const { return _tagname.c_str(); }
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Type type () const { return _type; }
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int mode () const { return _mode; }
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bool ok () const { return _ok; }
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struct Descriptor {
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std::string tag;
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std::string device;
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int mode;
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Port::Type type;
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Descriptor (const XMLNode&);
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XMLNode& get_state();
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};
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protected:
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bool _ok;
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bool _currently_in_cycle;
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nframes_t _nframes_this_cycle;
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Type _type;
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std::string _devname;
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std::string _tagname;
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int _mode;
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size_t _number;
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Channel *_channel[16];
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unsigned int bytes_written;
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unsigned int bytes_read;
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Parser *input_parser;
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Parser *output_parser;
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size_t slowdown;
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virtual std::string get_typestring () const = 0;
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private:
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static size_t nports;
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};
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struct PortSet {
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PortSet (std::string str) : owner (str) { }
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std::string owner;
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std::list<XMLNode> ports;
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};
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std::ostream & operator << ( std::ostream & os, const Port & port );
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} // namespace MIDI
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#endif // __libmidi_port_h__
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