2 Copyright (C) 2004 Paul Davis
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #ifndef __ardour_panner_h__
21 #define __ardour_panner_h__
27 #include <sigc++/signal.h>
29 #include <pbd/stateful.h>
30 #include <pbd/controllable.h>
32 #include <ardour/types.h>
33 #include <ardour/curve.h>
45 class StreamPanner : public sigc::trackable, public PBD::Stateful
48 StreamPanner (Panner& p);
51 void set_muted (bool yn);
52 bool muted() const { return _muted; }
54 void set_position (float x, bool link_call = false);
55 void set_position (float x, float y, bool link_call = false);
56 void set_position (float x, float y, float z, bool link_call = false);
58 void get_position (float& xpos) const { xpos = x; }
59 void get_position (float& xpos, float& ypos) const { xpos = x; ypos = y; }
60 void get_position (float& xpos, float& ypos, float& zpos) const { xpos = x; ypos = y; zpos = z; }
62 void get_effective_position (float& xpos) const { xpos = effective_x; }
63 void get_effective_position (float& xpos, float& ypos) const { xpos = effective_x; ypos = effective_y; }
64 void get_effective_position (float& xpos, float& ypos, float& zpos) const { xpos = effective_x; ypos = effective_y; zpos = effective_z; }
66 /* the basic StreamPanner API */
68 virtual void distribute (AudioBuffer& src, BufferSet& obufs, gain_t gain_coeff, nframes_t nframes) = 0;
69 virtual void distribute_automated (AudioBuffer& src, BufferSet& obufs,
70 nframes_t start, nframes_t end, nframes_t nframes, pan_t** buffers) = 0;
74 virtual void snapshot (nframes_t now) = 0;
75 virtual void transport_stopped (nframes_t frame) = 0;
76 virtual void set_automation_state (AutoState) = 0;
77 virtual void set_automation_style (AutoStyle) = 0;
79 PBD::Controllable& control() { return _control; }
81 /* XXX this is wrong. for multi-dimensional panners, there
82 must surely be more than 1 automation curve.
85 virtual Curve& automation() = 0;
87 sigc::signal<void> Changed; /* for position */
88 sigc::signal<void> StateChanged; /* for mute */
90 int set_state (const XMLNode&);
91 virtual XMLNode& state (bool full_state) = 0;
93 Panner & get_parent() { return parent; }
95 /* old school automation loading */
97 virtual int load (istream&, string path, uint32_t&) = 0;
107 /* these are for automation. they store the last value
108 used by the most recent process() cycle.
117 struct PanControllable : public PBD::Controllable {
118 PanControllable (std::string name, StreamPanner& p) : Controllable (name), panner (p) {}
120 StreamPanner& panner;
122 void set_value (float);
123 float get_value (void) const;
124 bool can_send_feedback() const;
127 PanControllable _control;
129 void add_state (XMLNode&);
130 virtual void update () = 0;
133 class BaseStereoPanner : public StreamPanner
136 BaseStereoPanner (Panner&);
137 ~BaseStereoPanner ();
139 /* this class just leaves the pan law itself to be defined
140 by the update(), distribute_automated()
141 methods. derived classes also need a factory method
142 and a type name. See EqualPowerStereoPanner as an example.
145 void distribute (AudioBuffer& src, BufferSet& obufs, gain_t gain_coeff, nframes_t nframes);
147 void snapshot (nframes_t now);
148 void transport_stopped (nframes_t frame);
149 void set_automation_state (AutoState);
150 void set_automation_style (AutoStyle);
152 Curve& automation() { return _automation; }
154 /* old school automation loading */
156 int load (istream&, string path, uint32_t&);
169 class EqualPowerStereoPanner : public BaseStereoPanner
172 EqualPowerStereoPanner (Panner&);
173 ~EqualPowerStereoPanner ();
175 void distribute_automated (AudioBuffer& src, BufferSet& obufs,
176 nframes_t start, nframes_t end, nframes_t nframes, pan_t** buffers);
178 void get_current_coefficients (pan_t*) const;
179 void get_desired_coefficients (pan_t*) const;
181 static StreamPanner* factory (Panner&);
184 XMLNode& state (bool full_state);
185 XMLNode& get_state (void);
186 int set_state (const XMLNode&);
192 class Multi2dPanner : public StreamPanner
195 Multi2dPanner (Panner& parent);
198 void snapshot (nframes_t now);
199 void transport_stopped (nframes_t frame);
200 void set_automation_state (AutoState);
201 void set_automation_style (AutoStyle);
203 /* XXX this is wrong. for multi-dimensional panners, there
204 must surely be more than 1 automation curve.
207 Curve& automation() { return _automation; }
209 void distribute (AudioBuffer& src, BufferSet& obufs, gain_t gain_coeff, nframes_t nframes);
210 void distribute_automated (AudioBuffer& src, BufferSet& obufs,
211 nframes_t start, nframes_t end, nframes_t nframes, pan_t** buffers);
213 static StreamPanner* factory (Panner&);
216 XMLNode& state (bool full_state);
217 XMLNode& get_state (void);
218 int set_state (const XMLNode&);
220 /* old school automation loading */
222 int load (istream&, string path, uint32_t&);
229 class Panner : public std::vector<StreamPanner*>, public PBD::Stateful, public sigc::trackable
238 Output (float xp, float yp)
239 : x (xp), y (yp), current_pan (0.0f), desired_pan (0.f) {}
243 Panner (string name, Session&);
246 /// The fundamental Panner function
247 void distribute(BufferSet& src, BufferSet& dest, nframes_t start_frame, nframes_t end_frames, nframes_t nframes, nframes_t offset);
249 bool bypassed() const { return _bypassed; }
250 void set_bypassed (bool yn);
252 StreamPanner* add ();
253 void remove (uint32_t which);
255 void reset (uint32_t noutputs, uint32_t npans);
257 void snapshot (nframes_t now);
258 void transport_stopped (nframes_t frame);
260 void clear_automation ();
262 void set_automation_state (AutoState);
263 AutoState automation_state() const;
264 void set_automation_style (AutoStyle);
265 AutoStyle automation_style() const;
266 bool touching() const;
268 XMLNode& get_state (void);
269 XMLNode& state (bool full);
270 int set_state (const XMLNode&);
272 sigc::signal<void> Changed;
274 static bool equivalent (pan_t a, pan_t b) {
275 return fabsf (a - b) < 0.002; // about 1 degree of arc for a stereo panner
278 void move_output (uint32_t, float x, float y);
279 uint32_t nouts() const { return outputs.size(); }
280 Output& output (uint32_t n) { return outputs[n]; }
282 std::vector<Output> outputs;
283 Session& session() const { return _session; }
290 LinkDirection link_direction() const { return _link_direction; }
291 void set_link_direction (LinkDirection);
293 bool linked() const { return _linked; }
294 void set_linked (bool yn);
296 sigc::signal<void> LinkStateChanged;
297 sigc::signal<void> StateChanged; /* for bypass */
299 /* only StreamPanner should call these */
301 void set_position (float x, StreamPanner& orig);
302 void set_position (float x, float y, StreamPanner& orig);
303 void set_position (float x, float y, float z, StreamPanner& orig);
305 /* old school automation */
310 void distribute_no_automation(BufferSet& src, BufferSet& dest, nframes_t nframes, nframes_t offset, gain_t gain_coeff);
313 uint32_t current_outs;
316 LinkDirection _link_direction;
318 static float current_automation_version_number;
320 /* old school automation handling */
322 std::string automation_path;
323 void set_name (std::string);
326 } // namespace ARDOUR
328 #endif /*__ardour_panner_h__ */