1 files changed, 408 insertions, 0 deletions
diff --git a/libs/ardour/ardour/io.h b/libs/ardour/ardour/io.h
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+/*
+    Copyright (C) 2000 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.
+
+    $Id$
+*/
+
+#ifndef __ardour_io_h__
+#define __ardour_io_h__
+
+#include <string>
+#include <vector>
+#include <cmath>
+#include <sigc++/signal.h>
+#include <jack/jack.h>
+
+#include <pbd/lockmonitor.h>
+#include <pbd/fastlog.h>
+#include <pbd/undo.h>
+#include <pbd/atomic.h>
+#include <midi++/controllable.h>
+
+#include <ardour/ardour.h>
+#include <ardour/stateful.h>
+#include <ardour/utils.h>
+#include <ardour/state_manager.h>
+#include <ardour/curve.h>
+
+using std::string;
+using std::vector;
+
+class XMLNode;
+
+namespace ARDOUR {
+
+class Session;
+class AudioEngine;
+class Port;
+class Connection;
+class Panner;
+
+class IO : public Stateful, public ARDOUR::StateManager
+{
+
+  public:
+	static const string state_node_name;
+
+	IO (Session&, string name, 
+	    int input_min = -1, int input_max = -1, 
+	    int output_min = -1, int output_max = -1);
+
+	virtual ~IO();
+
+	int input_minimum() const { return _input_minimum; }
+	int input_maximum() const { return _input_maximum; }
+	int output_minimum() const { return _output_minimum; }
+	int output_maximum() const { return _output_maximum; }
+
+	void set_input_minimum (int n);
+	void set_input_maximum (int n);
+	void set_output_minimum (int n);
+	void set_output_maximum (int n);
+
+	const string& name() const { return _name; }
+	virtual int set_name (string str, void *src);
+	
+	virtual void silence  (jack_nframes_t, jack_nframes_t offset);
+
+	void pan (vector<Sample*>& bufs, uint32_t nbufs, jack_nframes_t nframes, jack_nframes_t offset, gain_t gain_coeff);
+	void pan_automated (vector<Sample*>& bufs, uint32_t nbufs, jack_nframes_t start_frame, jack_nframes_t end_frame, 
+			    jack_nframes_t nframes, jack_nframes_t offset);
+	void collect_input  (vector<Sample*>&, uint32_t nbufs, jack_nframes_t nframes, jack_nframes_t offset);
+	void deliver_output (vector<Sample *>&, uint32_t nbufs, jack_nframes_t nframes, jack_nframes_t offset);
+	void deliver_output_no_pan (vector<Sample *>&, uint32_t nbufs, jack_nframes_t nframes, jack_nframes_t offset);
+	void just_meter_input (jack_nframes_t start_frame, jack_nframes_t end_frame, 
+			       jack_nframes_t nframes, jack_nframes_t offset);
+
+	virtual uint32_t n_process_buffers () { return 0; }
+
+	virtual void   set_gain (gain_t g, void *src);
+	void   inc_gain (gain_t delta, void *src);
+	gain_t         gain () const                      { return _desired_gain; }
+	virtual gain_t effective_gain () const;
+
+	Panner& panner() { return *_panner; }
+
+	int ensure_io (uint32_t, uint32_t, bool clear, void *src);
+
+	int use_input_connection (Connection&, void *src);
+	int use_output_connection (Connection&, void *src);
+
+	Connection *input_connection() const { return _input_connection; }
+	Connection *output_connection() const { return _output_connection; }
+
+	int add_input_port (string source, void *src);
+	int add_output_port (string destination, void *src);
+
+	int remove_input_port (Port *, void *src);
+	int remove_output_port (Port *, void *src);
+
+	int set_input (Port *, void *src);
+
+	int connect_input (Port *our_port, string other_port, void *src);
+	int connect_output (Port *our_port, string other_port, void *src);
+
+	int disconnect_input (Port *our_port, string other_port, void *src);
+	int disconnect_output (Port *our_port, string other_port, void *src);
+
+	int disconnect_inputs (void *src);
+	int disconnect_outputs (void *src);
+
+	jack_nframes_t output_latency() const;
+	jack_nframes_t input_latency() const;
+	void           set_port_latency (jack_nframes_t);
+
+	Port *output (uint32_t n) const {
+		if (n < _noutputs) {
+			return _outputs[n];
+		} else {
+			return 0;
+		}
+	}
+
+	Port *input (uint32_t n) const {
+		if (n < _ninputs) {
+			return _inputs[n];
+		} else {
+			return 0;
+		}
+	}
+
+	uint32_t n_inputs () const { return _ninputs; }
+	uint32_t n_outputs () const { return _noutputs; }
+
+	sigc::signal<void,IOChange,void*> input_changed;
+	sigc::signal<void,IOChange,void*> output_changed;
+
+	sigc::signal<void,void*> gain_changed;
+	sigc::signal<void,void*> name_changed;
+
+	virtual XMLNode& state (bool full);
+	XMLNode& get_state (void);
+	int set_state (const XMLNode&);
+
+	virtual UndoAction get_memento() const;
+
+
+	static int  disable_connecting (void);
+
+	static int  enable_connecting (void);
+
+	static int  disable_ports (void);
+
+	static int  enable_ports (void);
+
+	static int  disable_panners (void);
+
+	static int  reset_panners (void);
+	
+	static sigc::signal<int> PortsLegal;
+	static sigc::signal<int> PannersLegal;
+	static sigc::signal<int> ConnectingLegal;
+	static sigc::signal<void,uint32_t> MoreOutputs;
+	static sigc::signal<int> PortsCreated;
+
+	/* MIDI control */
+
+	void set_midi_to_gain_function (gain_t (*function)(double val)) {
+		_midi_gain_control.midi_to_gain = function;
+	}
+
+	void set_gain_to_midi_function (double (*function)(gain_t gain)) {
+		_midi_gain_control.gain_to_midi = function;
+	}
+
+	MIDI::Controllable& midi_gain_control() {
+		return _midi_gain_control;
+	}
+
+	virtual void reset_midi_control (MIDI::Port*, bool on);
+
+	virtual void send_all_midi_feedback ();
+	virtual MIDI::byte* write_midi_feedback (MIDI::byte*, int32_t& bufsize);
+	
+	/* Peak metering */
+
+	float peak_input_power (uint32_t n) { 
+		if (n < std::max(_ninputs, _noutputs)) {
+			float x = _stored_peak_power[n];
+			if(x > 0.0) {
+				return 20 * fast_log10(x);
+			} else {
+				return minus_infinity();
+			}
+		} else {
+			return minus_infinity();
+		}
+	}
+
+	static sigc::signal<void> GrabPeakPower;
+
+	/* automation */
+
+	void clear_automation ();
+
+	bool gain_automation_recording() const { 
+		return (_gain_automation_curve.automation_state() & (Write|Touch));
+	}
+
+	bool gain_automation_playback() const {
+		return (_gain_automation_curve.automation_state() & Play) ||
+			((_gain_automation_curve.automation_state() & Touch) && 
+			 !_gain_automation_curve.touching());
+	}
+
+	virtual void set_gain_automation_state (AutoState);
+	AutoState gain_automation_state() const { return _gain_automation_curve.automation_state(); }
+	sigc::signal<void> gain_automation_state_changed;
+
+	virtual void set_gain_automation_style (AutoStyle);
+	AutoStyle gain_automation_style () const { return _gain_automation_curve.automation_style(); }
+	sigc::signal<void> gain_automation_style_changed;
+
+	static void set_automation_interval (jack_nframes_t frames) {
+		_automation_interval = frames;
+	}
+
+	static jack_nframes_t automation_interval() { 
+		return _automation_interval;
+	}
+
+	virtual void transport_stopped (jack_nframes_t now);
+	virtual void automation_snapshot (jack_nframes_t now);
+
+	ARDOUR::Curve& gain_automation_curve () { return _gain_automation_curve; }
+
+	void start_gain_touch ();
+	void end_gain_touch ();
+
+	void start_pan_touch (uint32_t which);
+	void end_pan_touch (uint32_t which);
+
+	id_t id() const { return _id; }
+
+	void defer_pan_reset ();
+	void allow_pan_reset ();
+
+	/* the session calls this for master outs before
+	   anyone else. controls outs too, at some point.
+	*/
+
+	XMLNode *pending_state_node;
+	int ports_became_legal ();
+
+  private:
+	mutable PBD::Lock io_lock;
+
+  protected:
+	Session&            _session;
+	Panner*             _panner;
+	gain_t              _gain;
+	gain_t              _effective_gain;
+	gain_t              _desired_gain;
+	PBD::NonBlockingLock declick_lock;
+	vector<Port*>       _outputs;
+	vector<Port*>       _inputs;
+	vector<float>       _peak_power;
+	vector<float>       _stored_peak_power;
+	string              _name;
+	Connection*         _input_connection;
+	Connection*         _output_connection;
+	id_t                _id;
+	bool                 no_panner_reset;
+	XMLNode*             deferred_state;
+
+	virtual void set_deferred_state() {}
+
+	void reset_peak_meters();
+	void reset_panner ();
+
+	virtual uint32_t pans_required() const { return _ninputs; }
+
+	static void apply_declick (vector<Sample*>&, uint32_t nbufs, jack_nframes_t nframes, 
+				   gain_t initial, gain_t target, bool invert_polarity);
+
+	struct MIDIGainControl : public MIDI::Controllable {
+	    MIDIGainControl (IO&, MIDI::Port *);
+	    void set_value (float);
+
+	    void send_feedback (gain_t);
+	    MIDI::byte* write_feedback (MIDI::byte* buf, int32_t& bufsize, gain_t val, bool force = false);
+
+	    IO& io;
+	    bool setting;
+	    MIDI::byte last_written;
+
+	    gain_t (*midi_to_gain) (double val);
+	    double (*gain_to_midi) (gain_t gain);
+	};
+
+	MIDIGainControl _midi_gain_control;
+
+	/* state management */
+
+	Change               restore_state (State&);
+	StateManager::State* state_factory (std::string why) const;
+	void                 send_state_changed();
+
+	bool get_midi_node_info (XMLNode * node, MIDI::eventType & ev, MIDI::channel_t & chan, MIDI::byte & additional);
+	bool set_midi_node_info (XMLNode * node, MIDI::eventType ev, MIDI::channel_t chan, MIDI::byte additional);
+	
+	/* automation */
+
+	jack_nframes_t last_automation_snapshot;
+	static jack_nframes_t _automation_interval;
+
+        AutoState      _gain_automation_state;
+	AutoStyle      _gain_automation_style;
+
+	bool     apply_gain_automation;
+	Curve    _gain_automation_curve;
+	
+	int  save_automation (const string&);
+	int  load_automation (const string&);
+	
+	PBD::NonBlockingLock automation_lock;
+
+	/* AudioTrack::deprecated_use_diskstream_connections() needs these */
+
+	int set_inputs (const string& str);
+	int set_outputs (const string& str);
+
+	static bool connecting_legal;
+	static bool ports_legal;
+
+  private:
+
+	uint32_t _ninputs;
+	uint32_t _noutputs;
+
+	/* are these the best variable names ever, or what? */
+
+	sigc::connection input_connection_configuration_connection;
+	sigc::connection output_connection_configuration_connection;
+	sigc::connection input_connection_connection_connection;
+	sigc::connection output_connection_connection_connection;
+
+	static bool panners_legal;
+	
+	int connecting_became_legal ();
+	int panners_became_legal ();
+	sigc::connection connection_legal_c;
+	sigc::connection port_legal_c;
+	sigc::connection panner_legal_c;
+
+	int _input_minimum;
+	int _input_maximum;
+	int _output_minimum;
+	int _output_maximum;
+
+
+	static int parse_io_string (const string&, vector<string>& chns);
+
+	static int parse_gain_string (const string&, vector<string>& chns);
+	
+	int set_sources (vector<string>&, void *src, bool add);
+	int set_destinations (vector<string>&, void *src, bool add);
+
+	int ensure_inputs (uint32_t, bool clear, bool lockit, void *src);
+	int ensure_outputs (uint32_t, bool clear, bool lockit, void *src);
+
+	void drop_input_connection ();
+	void drop_output_connection ();
+
+	void input_connection_configuration_changed ();
+	void input_connection_connection_changed (int);
+	void output_connection_configuration_changed ();
+	void output_connection_connection_changed (int);
+
+	int create_ports (const XMLNode&);
+	int make_connections (const XMLNode&);
+
+	void setup_peak_meters ();
+	void grab_peak_power ();
+
+	bool ensure_inputs_locked (uint32_t, bool clear, void *src);
+	bool ensure_outputs_locked (uint32_t, bool clear, void *src);
+
+	int32_t find_input_port_hole ();
+	int32_t find_output_port_hole ();
+};
+
+}; /* namespace ARDOUR */
+
+#endif /*__ardour_io_h__ */