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, nframes_t);
60 void distribute_automated (AudioBuffer &, BufferSet &, nframes_t, nframes_t, nframes_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, nframes_t nframes) = 0;
73 virtual void do_distribute_automated (AudioBuffer& src, BufferSet& obufs,
74 nframes_t start, nframes_t end, nframes_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;
96 PBD::AngularVector _angles;
97 PBD::AngularVector _effective_angles;
103 boost::shared_ptr<AutomationControl> _control;
105 void add_state (XMLNode&);
107 /* Update internal parameters based on this.angles */
108 virtual void update () = 0;
111 class BaseStereoPanner : public StreamPanner
114 BaseStereoPanner (Panner&, Evoral::Parameter param);
115 ~BaseStereoPanner ();
117 /* this class just leaves the pan law itself to be defined
118 by the update(), do_distribute_automated()
119 methods. derived classes also need a factory method
120 and a type name. See EqualPowerStereoPanner as an example.
123 void do_distribute (AudioBuffer& src, BufferSet& obufs, gain_t gain_coeff, nframes_t nframes);
125 static double azimuth_to_lr_fract (double azi) {
126 /* 180.0 degrees=> left => 0.0 */
127 /* 0.0 degrees => right => 1.0 */
128 return 1.0 - (azi/180.0);
131 static double lr_fract_to_azimuth (double fract) {
132 /* fract = 0.0 => degrees = 180.0 => left */
133 /* fract = 1.0 => degrees = 0.0 => right */
134 return 180.0 - (fract * 180.0);
137 /* old school automation loading */
139 int load (std::istream&, std::string path, uint32_t&);
150 class EqualPowerStereoPanner : public BaseStereoPanner
153 EqualPowerStereoPanner (Panner&, Evoral::Parameter param);
154 ~EqualPowerStereoPanner ();
156 void do_distribute_automated (AudioBuffer& src, BufferSet& obufs,
157 nframes_t start, nframes_t end, nframes_t nframes,
160 void get_current_coefficients (pan_t*) const;
161 void get_desired_coefficients (pan_t*) const;
163 static StreamPanner* factory (Panner&, Evoral::Parameter param, Speakers&);
164 static std::string name;
166 XMLNode& state (bool full_state);
167 XMLNode& get_state (void);
168 int set_state (const XMLNode&, int version);
174 /** Class to pan from some number of inputs to some number of outputs.
175 * This class has a number of StreamPanners, one for each input.
177 class Panner : public SessionObject, public Automatable
181 PBD::AngularVector position;
185 Output (const PBD::AngularVector& a)
186 : position (a), current_pan (0), desired_pan (0) {}
190 Panner (std::string name, Session&);
193 void clear_panners ();
194 bool empty() const { return _streampanners.empty(); }
196 void set_automation_state (AutoState);
197 AutoState automation_state() const;
198 void set_automation_style (AutoStyle);
199 AutoStyle automation_style() const;
200 bool touching() const;
202 bool can_support_io_configuration (const ChanCount& /*in*/, ChanCount& /*out*/) const { return true; };
204 /// The fundamental Panner function
205 void run (BufferSet& src, BufferSet& dest, framepos_t start_frame, framepos_t end_frames, nframes_t nframes);
207 bool bypassed() const { return _bypassed; }
208 void set_bypassed (bool yn);
209 bool mono () const { return _mono; }
210 void set_mono (bool);
212 StreamPanner* add ();
213 void remove (uint32_t which);
214 void reset (uint32_t noutputs, uint32_t npans);
215 void reset_streampanner (uint32_t which_panner);
216 void reset_to_default ();
218 XMLNode& get_state (void);
219 XMLNode& state (bool full);
220 int set_state (const XMLNode&, int version);
222 static bool equivalent (pan_t a, pan_t b) {
223 return fabsf (a - b) < 0.002; // about 1 degree of arc for a stereo panner
225 static bool equivalent (const PBD::AngularVector& a, const PBD::AngularVector& b) {
226 /* XXX azimuth only, at present */
227 return fabs (a.azi - b.azi) < 1.0;
230 void move_output (uint32_t, float x, float y);
231 uint32_t nouts() const { return outputs.size(); }
232 Output& output (uint32_t n) { return outputs[n]; }
239 LinkDirection link_direction() const { return _link_direction; }
240 void set_link_direction (LinkDirection);
242 bool linked() const { return _linked; }
243 void set_linked (bool yn);
245 StreamPanner &streampanner( uint32_t n ) const { assert( n < _streampanners.size() ); return *_streampanners[n]; }
246 uint32_t npanners() const { return _streampanners.size(); }
248 PBD::Signal0<void> Changed; /* panner and/or outputs count changed */
249 PBD::Signal0<void> LinkStateChanged;
250 PBD::Signal0<void> StateChanged; /* for bypass */
252 /* only StreamPanner should call these */
254 void set_position (const PBD::AngularVector&, StreamPanner& orig);
256 /* old school automation */
260 struct PanControllable : public AutomationControl {
261 PanControllable (Session& s, std::string name, Panner& p, Evoral::Parameter param)
262 : AutomationControl (s, param,
263 boost::shared_ptr<AutomationList>(new AutomationList(param)), name)
265 { assert(param.type() != NullAutomation); }
267 AutomationList* alist() { return (AutomationList*)_list.get(); }
270 void set_value (double);
271 double get_value (void) const;
274 boost::shared_ptr<AutomationControl> pan_control (int id, int chan=0) {
275 return automation_control (Evoral::Parameter (PanAutomation, chan, id));
278 boost::shared_ptr<const AutomationControl> pan_control (int id, int chan=0) const {
279 return automation_control (Evoral::Parameter (PanAutomation, chan, id));
282 static std::string value_as_string (double);
285 /* disallow copy construction */
286 Panner (Panner const &);
288 void distribute_no_automation(BufferSet& src, BufferSet& dest, nframes_t nframes, gain_t gain_coeff);
289 std::vector<StreamPanner*> _streampanners; ///< one StreamPanner per input
290 std::vector<Output> outputs;
291 uint32_t current_outs;
295 LinkDirection _link_direction;
297 static float current_automation_version_number;
299 void setup_speakers (uint32_t nouts);
301 /* old school automation handling */
303 std::string automation_path;
306 } // namespace ARDOUR
308 #endif /*__ardour_panner_h__ */