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__
29 #include "pbd/stateful.h"
30 #include "pbd/controllable.h"
31 #include "pbd/cartesian.h"
33 #include "ardour/types.h"
34 #include "ardour/automation_control.h"
35 #include "ardour/processor.h"
45 class StreamPanner : public PBD::Stateful
48 StreamPanner (Panner& p, Evoral::Parameter param);
51 void set_muted (bool yn);
52 bool muted() const { return _muted; }
54 const PBD::AngularVector& get_position() const { return _angles; }
55 const PBD::AngularVector& get_effective_position() const { return _effective_angles; }
56 void set_position (const PBD::AngularVector&, bool link_call = false);
57 void set_diffusion (double);
59 void distribute (AudioBuffer &, BufferSet &, gain_t, pframes_t);
60 void distribute_automated (AudioBuffer &, BufferSet &, framepos_t, framepos_t, pframes_t, pan_t **);
62 /* the basic StreamPanner API */
65 * Pan some input samples to a number of output buffers.
67 * @param src Input buffer.
68 * @param obufs Output buffers (one per panner output).
69 * @param gain_coeff Gain coefficient to apply to output samples.
70 * @param nframes Number of frames in the input.
72 virtual void do_distribute (AudioBuffer& src, BufferSet& obufs, gain_t gain_coeff, pframes_t nframes) = 0;
73 virtual void do_distribute_automated (AudioBuffer& src, BufferSet& obufs,
74 framepos_t start, framepos_t end, pframes_t nframes,
77 boost::shared_ptr<AutomationControl> pan_control() { return _control; }
79 PBD::Signal0<void> Changed; /* for position or diffusion */
80 PBD::Signal0<void> StateChanged; /* for mute, mono */
82 int set_state (const XMLNode&, int version);
83 virtual XMLNode& state (bool full_state) = 0;
85 Panner & get_parent() { return parent; }
87 /* old school automation loading */
88 virtual int load (std::istream&, std::string path, uint32_t&) = 0;
90 struct PanControllable : public AutomationControl {
91 PanControllable (Session& s, std::string name, StreamPanner* p, Evoral::Parameter param)
92 : AutomationControl (s, param,
93 boost::shared_ptr<AutomationList>(new AutomationList(param)), name)
95 { assert (param.type() == PanAutomation); }
97 AutomationList* alist() { return (AutomationList*)_list.get(); }
98 StreamPanner* streampanner;
100 void set_value (double);
101 double get_value (void) const;
102 double lower () const;
109 void set_mono (bool);
111 PBD::AngularVector _angles;
112 PBD::AngularVector _effective_angles;
118 boost::shared_ptr<AutomationControl> _control;
120 XMLNode& get_state ();
122 /* Update internal parameters based on this.angles */
123 virtual void update () = 0;
126 class BaseStereoPanner : public StreamPanner
129 BaseStereoPanner (Panner&, Evoral::Parameter param);
130 ~BaseStereoPanner ();
132 /* this class just leaves the pan law itself to be defined
133 by the update(), do_distribute_automated()
134 methods. derived classes also need a factory method
135 and a type name. See EqualPowerStereoPanner as an example.
138 void do_distribute (AudioBuffer& src, BufferSet& obufs, gain_t gain_coeff, pframes_t nframes);
140 static double azimuth_to_lr_fract (double azi) {
141 /* 180.0 degrees=> left => 0.0 */
142 /* 0.0 degrees => right => 1.0 */
143 return 1.0 - (azi/180.0);
146 static double lr_fract_to_azimuth (double fract) {
147 /* fract = 0.0 => degrees = 180.0 => left */
148 /* fract = 1.0 => degrees = 0.0 => right */
149 return 180.0 - (fract * 180.0);
152 /* old school automation loading */
154 int load (std::istream&, std::string path, uint32_t&);
165 class EqualPowerStereoPanner : public BaseStereoPanner
168 EqualPowerStereoPanner (Panner&, Evoral::Parameter param);
169 ~EqualPowerStereoPanner ();
171 void do_distribute_automated (AudioBuffer& src, BufferSet& obufs,
172 framepos_t start, framepos_t end, pframes_t nframes,
175 void get_current_coefficients (pan_t*) const;
176 void get_desired_coefficients (pan_t*) const;
178 static StreamPanner* factory (Panner&, Evoral::Parameter param, Speakers&);
179 static std::string name;
181 XMLNode& state (bool full_state);
182 XMLNode& get_state (void);
183 int set_state (const XMLNode&, int version);
189 /** Class to pan from some number of inputs to some number of outputs.
190 * This class has a number of StreamPanners, one for each input.
192 class Panner : public SessionObject, public Automatable
196 PBD::AngularVector position;
200 Output (const PBD::AngularVector& a)
201 : position (a), current_pan (0), desired_pan (0) {}
205 Panner (std::string name, Session&);
208 void clear_panners ();
209 bool empty() const { return _streampanners.empty(); }
211 void set_automation_state (AutoState);
212 AutoState automation_state() const;
213 void set_automation_style (AutoStyle);
214 AutoStyle automation_style() const;
215 bool touching() const;
217 std::string describe_parameter (Evoral::Parameter param);
219 bool can_support_io_configuration (const ChanCount& /*in*/, ChanCount& /*out*/) const { return true; };
221 /// The fundamental Panner function
222 void run (BufferSet& src, BufferSet& dest, framepos_t start_frame, framepos_t end_frames, pframes_t nframes);
224 bool bypassed() const { return _bypassed; }
225 void set_bypassed (bool yn);
226 bool mono () const { return _mono; }
227 void set_mono (bool);
229 StreamPanner* add ();
230 void remove (uint32_t which);
231 void reset (uint32_t noutputs, uint32_t npans);
232 void reset_streampanner (uint32_t which_panner);
233 void reset_to_default ();
235 XMLNode& get_state (void);
236 XMLNode& state (bool full);
237 int set_state (const XMLNode&, int version);
239 static bool equivalent (pan_t a, pan_t b) {
240 return fabsf (a - b) < 0.002; // about 1 degree of arc for a stereo panner
242 static bool equivalent (const PBD::AngularVector& a, const PBD::AngularVector& b) {
243 /* XXX azimuth only, at present */
244 return fabs (a.azi - b.azi) < 1.0;
247 void move_output (uint32_t, float x, float y);
248 uint32_t nouts() const { return outputs.size(); }
249 Output& output (uint32_t n) { return outputs[n]; }
256 LinkDirection link_direction() const { return _link_direction; }
257 void set_link_direction (LinkDirection);
259 bool linked() const { return _linked; }
260 void set_linked (bool yn);
262 StreamPanner &streampanner( uint32_t n ) const { assert( n < _streampanners.size() ); return *_streampanners[n]; }
263 uint32_t npanners() const { return _streampanners.size(); }
265 PBD::Signal0<void> Changed; /* panner and/or outputs count changed */
266 PBD::Signal0<void> LinkStateChanged;
267 PBD::Signal0<void> StateChanged; /* for bypass */
269 /* only StreamPanner should call these */
271 void set_position (const PBD::AngularVector&, StreamPanner& orig);
273 /* old school automation */
277 boost::shared_ptr<AutomationControl> pan_control (int id, uint32_t chan=0) {
278 return automation_control (Evoral::Parameter (PanAutomation, chan, id));
281 boost::shared_ptr<const AutomationControl> pan_control (int id, uint32_t chan=0) const {
282 return automation_control (Evoral::Parameter (PanAutomation, chan, id));
285 boost::shared_ptr<AutomationControl> direction_control () {
286 return automation_control (Evoral::Parameter (PanAutomation, 0, 100));
289 boost::shared_ptr<AutomationControl> width_control () {
290 return automation_control (Evoral::Parameter (PanAutomation, 0, 200));
293 void set_stereo_position (double);
294 void set_stereo_width (double);
295 bool set_stereo_pan (double pos, double width);
297 static std::string value_as_string (double);
300 /* disallow copy construction */
301 Panner (Panner const &);
303 void distribute_no_automation(BufferSet& src, BufferSet& dest, pframes_t nframes, gain_t gain_coeff);
304 std::vector<StreamPanner*> _streampanners; ///< one StreamPanner per input
305 std::vector<Output> outputs;
306 uint32_t current_outs;
310 LinkDirection _link_direction;
312 static float current_automation_version_number;
314 void setup_speakers (uint32_t nouts);
315 void setup_meta_controls ();
317 /* old school automation handling */
319 std::string automation_path;
322 } // namespace ARDOUR
324 #endif /*__ardour_panner_h__ */