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/*
Copyright (C) 2002 Paul 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 __ardour_port_h__
#define __ardour_port_h__
#include <cstring>
#include <sigc++/signal.h>
#include <pbd/failed_constructor.h>
#include <ardour/ardour.h>
#include <jack/jack.h>
namespace ARDOUR {
class AudioEngine;
class Port : public sigc::trackable {
public:
virtual ~Port() {
// Port is an opaque pointer, so should be be deallocated ??
}
static nframes_t port_offset() { return _port_offset; }
static void set_port_offset (nframes_t off) {
_port_offset = off;
}
static void increment_port_offset (nframes_t n) {
_port_offset += n;
}
static void set_buffer_size (nframes_t sz) {
_buffer_size = sz;
}
std::string name() {
return _name;
}
std::string short_name() {
return jack_port_short_name (_port);
}
int set_name (std::string str);
JackPortFlags flags() const {
return _flags;
}
bool is_mine (jack_client_t *client) {
return jack_port_is_mine (client, _port);
}
const char* type() const {
return _type.c_str();
}
int connected () const {
return jack_port_connected (_port);
}
bool connected_to (const std::string& portname) const {
return jack_port_connected_to (_port, portname.c_str());
}
const char ** get_connections () const {
return jack_port_get_connections (_port);
}
void reset_overs () {
_short_overs = 0;
_long_overs = 0;
_overlen = 0;
}
void reset_peak_meter () {
_peak = 0;
}
void reset_meters () {
reset_peak_meter ();
reset_overs ();
}
void enable_metering() {
_metering++;
}
void disable_metering () {
if (_metering) { _metering--; }
}
float peak_db() const { return _peak_db; }
Sample peak() const { return _peak; }
uint32_t short_overs () const { return _short_overs; }
uint32_t long_overs () const { return _long_overs; }
static void set_short_over_length (nframes_t);
static void set_long_over_length (nframes_t);
bool receives_input() const {
return _flags & JackPortIsInput;
}
bool sends_output () const {
return _flags & JackPortIsOutput;
}
bool monitoring_input () const {
return jack_port_monitoring_input (_port);
}
bool can_monitor () const {
return _flags & JackPortCanMonitor;
}
void ensure_monitor_input (bool yn) {
#ifdef HAVE_JACK_PORT_ENSURE_MONITOR
jack_port_ensure_monitor (_port, yn);
#else
jack_port_request_monitor(_port, yn);
#endif
}
/*XXX completely bloody useless imho*/
void request_monitor_input (bool yn) {
jack_port_request_monitor (_port, yn);
}
nframes_t latency () const {
return jack_port_get_latency (_port);
}
void set_latency (nframes_t nframes) {
jack_port_set_latency (_port, nframes);
}
sigc::signal<void,bool> MonitorInputChanged;
sigc::signal<void,bool> ClockSyncChanged;
bool is_silent() const { return _silent; }
/** Assumes that the port is an audio output port */
void silence (nframes_t nframes) {
if (!_silent) {
memset ((Sample *) jack_port_get_buffer (_port, nframes) + _port_offset, 0, sizeof (Sample) * nframes);
if (nframes == _buffer_size) {
/* its a heuristic. its not perfect */
_silent = true;
}
}
}
void mark_silence (bool yn) {
_silent = yn;
}
private:
friend class AudioEngine;
Port (jack_port_t *port);
void reset ();
/* engine isn't supposed to use anything below here */
/* cache these 3 from JACK so that we can
access them for reconnecting.
*/
JackPortFlags _flags;
std::string _type;
std::string _name;
bool _last_monitor : 1;
bool _silent : 1;
jack_port_t *_port;
nframes_t _overlen;
Sample _peak;
float _peak_db;
uint32_t _short_overs;
uint32_t _long_overs;
unsigned short _metering;
static nframes_t _long_over_length;
static nframes_t _short_over_length;
static nframes_t _port_offset;
static nframes_t _buffer_size;
private:
friend class IO; // get_(input|output)_buffer
friend class Session; // session_export.cc
Sample *get_buffer (nframes_t nframes) {
/* ignore requested size, because jack always
reads the entire port buffer.
*/
return (Sample *) jack_port_get_buffer (_port, _buffer_size) + _port_offset;
}
};
} // namespace ARDOUR
#endif /* __ardour_port_h__ */
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