329 lines
9.4 KiB
C++
329 lines
9.4 KiB
C++
/*
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Copyright (C) 2004 Paul Davis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef __ardour_panner_h__
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#define __ardour_panner_h__
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#include <cmath>
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#include <cassert>
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#include <vector>
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#include <string>
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#include <iostream>
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#include "pbd/stateful.h"
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#include "pbd/controllable.h"
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#include "ardour/types.h"
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#include "ardour/automation_control.h"
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#include "ardour/processor.h"
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namespace ARDOUR {
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class Session;
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class Panner;
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class BufferSet;
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class AudioBuffer;
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class StreamPanner : public PBD::Stateful
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{
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public:
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StreamPanner (Panner& p, Evoral::Parameter param);
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~StreamPanner ();
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void set_muted (bool yn);
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bool muted() const { return _muted; }
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void set_position (float x, bool link_call = false);
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void set_position (float x, float y, bool link_call = false);
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void set_position (float x, float y, float z, bool link_call = false);
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void get_position (float& xpos) const { xpos = _x; }
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void get_position (float& xpos, float& ypos) const { xpos = _x; ypos = _y; }
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void get_position (float& xpos, float& ypos, float& zpos) const { xpos = _x; ypos = _y; zpos = _z; }
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void get_effective_position (float& xpos) const { xpos = effective_x; }
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void get_effective_position (float& xpos, float& ypos) const { xpos = effective_x; ypos = effective_y; }
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void get_effective_position (float& xpos, float& ypos, float& zpos) const { xpos = effective_x; ypos = effective_y; zpos = effective_z; }
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void distribute (AudioBuffer &, BufferSet &, gain_t, nframes_t);
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void distribute_automated (AudioBuffer &, BufferSet &, nframes_t, nframes_t, nframes_t, pan_t **);
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/* the basic StreamPanner API */
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/**
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* Pan some input samples to a number of output buffers.
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*
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* @param src Input buffer.
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* @param obufs Output buffers (one per panner output).
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* @param gain_coeff Gain coefficient to apply to output samples.
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* @param nframes Number of frames in the input.
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*/
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virtual void do_distribute (AudioBuffer& src, BufferSet& obufs, gain_t gain_coeff, nframes_t nframes) = 0;
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virtual void do_distribute_automated (AudioBuffer& src, BufferSet& obufs,
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nframes_t start, nframes_t end, nframes_t nframes, pan_t** buffers) = 0;
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boost::shared_ptr<AutomationControl> pan_control() { return _control; }
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PBD::Signal0<void> Changed; /* for position */
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PBD::Signal0<void> StateChanged; /* for mute, mono */
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int set_state (const XMLNode&, int version);
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virtual XMLNode& state (bool full_state) = 0;
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Panner & get_parent() { return parent; }
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/* old school automation loading */
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virtual int load (std::istream&, std::string path, uint32_t&) = 0;
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protected:
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friend class Panner;
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Panner& parent;
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void set_mono (bool);
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float _x;
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float _y;
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float _z;
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/* these are for automation. they store the last value
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used by the most recent process() cycle.
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*/
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float effective_x;
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float effective_y;
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float effective_z;
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bool _muted;
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bool _mono;
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boost::shared_ptr<AutomationControl> _control;
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void add_state (XMLNode&);
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/* Update internal parameters based on _x, _y and _z */
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virtual void update () = 0;
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};
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class BaseStereoPanner : public StreamPanner
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{
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public:
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BaseStereoPanner (Panner&, Evoral::Parameter param);
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~BaseStereoPanner ();
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/* this class just leaves the pan law itself to be defined
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by the update(), do_distribute_automated()
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methods. derived classes also need a factory method
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and a type name. See EqualPowerStereoPanner as an example.
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*/
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void do_distribute (AudioBuffer& src, BufferSet& obufs, gain_t gain_coeff, nframes_t nframes);
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/* old school automation loading */
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int load (std::istream&, std::string path, uint32_t&);
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protected:
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float left;
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float right;
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float desired_left;
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float desired_right;
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float left_interp;
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float right_interp;
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};
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class EqualPowerStereoPanner : public BaseStereoPanner
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{
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public:
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EqualPowerStereoPanner (Panner&, Evoral::Parameter param);
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~EqualPowerStereoPanner ();
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void do_distribute_automated (AudioBuffer& src, BufferSet& obufs,
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nframes_t start, nframes_t end, nframes_t nframes, pan_t** buffers);
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void get_current_coefficients (pan_t*) const;
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void get_desired_coefficients (pan_t*) const;
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static StreamPanner* factory (Panner&, Evoral::Parameter param);
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static std::string name;
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XMLNode& state (bool full_state);
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XMLNode& get_state (void);
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int set_state (const XMLNode&, int version);
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private:
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void update ();
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};
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class Multi2dPanner : public StreamPanner
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{
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public:
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Multi2dPanner (Panner& parent, Evoral::Parameter);
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~Multi2dPanner ();
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void do_distribute (AudioBuffer& src, BufferSet& obufs, gain_t gain_coeff, nframes_t nframes);
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void do_distribute_automated (AudioBuffer& src, BufferSet& obufs,
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nframes_t start, nframes_t end, nframes_t nframes, pan_t** buffers);
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static StreamPanner* factory (Panner&, Evoral::Parameter);
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static std::string name;
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XMLNode& state (bool full_state);
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XMLNode& get_state (void);
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int set_state (const XMLNode&, int version);
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/* old school automation loading */
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int load (std::istream&, std::string path, uint32_t&);
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private:
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void update ();
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};
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/** Class to pan from some number of inputs to some number of outputs.
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* This class has a number of StreamPanners, one for each input.
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*/
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class Panner : public SessionObject, public AutomatableControls
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{
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public:
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struct Output {
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float x;
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float y;
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pan_t current_pan;
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pan_t desired_pan;
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Output (float xp, float yp)
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: x (xp), y (yp), current_pan (0), desired_pan (0) {}
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};
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Panner (std::string name, Session&);
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virtual ~Panner ();
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void clear_panners ();
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bool empty() const { return _streampanners.empty(); }
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void set_automation_state (AutoState);
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AutoState automation_state() const;
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void set_automation_style (AutoStyle);
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AutoStyle automation_style() const;
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bool touching() const;
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bool can_support_io_configuration (const ChanCount& /*in*/, ChanCount& /*out*/) const { return true; };
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/// The fundamental Panner function
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void run (BufferSet& src, BufferSet& dest, sframes_t start_frame, sframes_t end_frames, nframes_t nframes);
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bool bypassed() const { return _bypassed; }
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void set_bypassed (bool yn);
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bool mono () const { return _mono; }
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void set_mono (bool);
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StreamPanner* add ();
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void remove (uint32_t which);
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void reset (uint32_t noutputs, uint32_t npans);
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void reset_streampanner (uint32_t which_panner);
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void reset_to_default ();
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XMLNode& get_state (void);
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XMLNode& state (bool full);
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int set_state (const XMLNode&, int version);
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static bool equivalent (pan_t a, pan_t b) {
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return fabsf (a - b) < 0.002; // about 1 degree of arc for a stereo panner
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}
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void move_output (uint32_t, float x, float y);
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uint32_t nouts() const { return outputs.size(); }
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Output& output (uint32_t n) { return outputs[n]; }
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enum LinkDirection {
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SameDirection,
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OppositeDirection
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};
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LinkDirection link_direction() const { return _link_direction; }
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void set_link_direction (LinkDirection);
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bool linked() const { return _linked; }
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void set_linked (bool yn);
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StreamPanner &streampanner( uint32_t n ) const { assert( n < _streampanners.size() ); return *_streampanners[n]; }
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uint32_t npanners() const { return _streampanners.size(); }
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PBD::Signal0<void> Changed;
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PBD::Signal0<void> LinkStateChanged;
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PBD::Signal0<void> StateChanged; /* for bypass */
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/* only StreamPanner should call these */
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void set_position (float x, StreamPanner& orig);
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void set_position (float x, float y, StreamPanner& orig);
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void set_position (float x, float y, float z, StreamPanner& orig);
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/* old school automation */
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int load ();
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struct PanControllable : public AutomationControl {
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PanControllable (Session& s, std::string name, Panner& p, Evoral::Parameter param)
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: AutomationControl (s, param,
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boost::shared_ptr<AutomationList>(new AutomationList(param)), name)
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, panner (p)
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{ assert(param.type() != NullAutomation); }
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AutomationList* alist() { return (AutomationList*)_list.get(); }
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Panner& panner;
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void set_value (float);
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float get_value (void) const;
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};
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boost::shared_ptr<AutomationControl> pan_control (int id, int chan=0) {
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return automation_control (Evoral::Parameter (PanAutomation, chan, id));
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}
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boost::shared_ptr<const AutomationControl> pan_control (int id, int chan=0) const {
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return automation_control (Evoral::Parameter (PanAutomation, chan, id));
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}
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private:
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/* disallow copy construction */
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Panner (Panner const &);
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void distribute_no_automation(BufferSet& src, BufferSet& dest, nframes_t nframes, gain_t gain_coeff);
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std::vector<StreamPanner*> _streampanners; ///< one StreamPanner per input
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std::vector<Output> outputs;
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uint32_t current_outs;
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bool _linked;
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bool _bypassed;
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bool _mono;
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LinkDirection _link_direction;
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static float current_automation_version_number;
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/* old school automation handling */
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std::string automation_path;
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};
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} // namespace ARDOUR
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#endif /*__ardour_panner_h__ */
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