David Robillard
166ef64e3d
git-svn-id: svn://localhost/ardour2/branches/3.0@4473 d708f5d6-7413-0410-9779-e7cbd77b26cf
275 lines
8.3 KiB
C++
275 lines
8.3 KiB
C++
/* This file is part of Evoral.
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* Copyright (C) 2008 Dave Robillard <http://drobilla.net>
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* Copyright (C) 2000-2008 Paul Davis
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*
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* Evoral is free software; you can redistribute it and/or modify it under the
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* terms of the GNU General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option) any later
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* version.
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*
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* Evoral is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef EVORAL_CONTROL_LIST_HPP
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#define EVORAL_CONTROL_LIST_HPP
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#include <list>
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#include <boost/pool/pool.hpp>
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#include <boost/pool/pool_alloc.hpp>
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#include <glibmm/thread.h>
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#include "evoral/types.hpp"
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#include "evoral/Parameter.hpp"
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#include "evoral/Curve.hpp"
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namespace Evoral {
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/** A single event (time-stamped value) for a control
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*/
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struct ControlEvent {
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ControlEvent (double w, double v)
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: when (w), value (v), coeff (0)
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{}
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ControlEvent (const ControlEvent& other)
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: when (other.when), value (other.value), coeff (0)
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{
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if (other.coeff) {
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create_coeffs();
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for (size_t i = 0; i < 4; ++i)
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coeff[i] = other.coeff[i];
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}
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}
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~ControlEvent() { if (coeff) delete[] coeff; }
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void create_coeffs() {
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if (!coeff)
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coeff = new double[4];
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coeff[0] = coeff[1] = coeff[2] = coeff[3] = 0.0;
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}
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double when;
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double value;
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double* coeff; ///< double[4] allocated by Curve as needed
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};
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/** Pool allocator for control lists that does not use a lock
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* and allocates 8k blocks of new pointers at a time
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*/
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typedef boost::fast_pool_allocator<
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ControlEvent*,
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boost::default_user_allocator_new_delete,
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boost::details::pool::null_mutex,
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8192>
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ControlEventAllocator;
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/** A list (sequence) of time-stamped values for a control
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*/
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class ControlList
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{
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public:
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typedef std::list<ControlEvent*,ControlEventAllocator> EventList;
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typedef EventList::iterator iterator;
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typedef EventList::reverse_iterator reverse_iterator;
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typedef EventList::const_iterator const_iterator;
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ControlList (const Parameter& id);
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ControlList (const ControlList&);
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ControlList (const ControlList&, double start, double end);
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virtual ~ControlList();
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virtual boost::shared_ptr<ControlList> create(Parameter id);
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ControlList& operator= (const ControlList&);
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bool operator== (const ControlList&);
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void freeze();
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void thaw ();
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const Parameter& parameter() const { return _parameter; }
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void set_parameter(const Parameter& p) { _parameter = p; }
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EventList::size_type size() const { return _events.size(); }
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bool empty() const { return _events.empty(); }
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void reset_default (double val) {
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_default_value = val;
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}
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void clear ();
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void x_scale (double factor);
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bool extend_to (double);
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void slide (iterator before, double distance);
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void reposition_for_rt_add (double when);
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void rt_add (double when, double value);
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void add (double when, double value);
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void fast_simple_add (double when, double value);
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void reset_range (double start, double end);
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void erase_range (double start, double end);
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void erase (iterator);
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void erase (iterator, iterator);
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void move_ranges (std::list< RangeMove<double> > const &);
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void modify (iterator, double, double);
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boost::shared_ptr<ControlList> cut (double, double);
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boost::shared_ptr<ControlList> copy (double, double);
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void clear (double, double);
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boost::shared_ptr<ControlList> cut (iterator, iterator);
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boost::shared_ptr<ControlList> copy (iterator, iterator);
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void clear (iterator, iterator);
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bool paste (ControlList&, double position, float times);
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void set_yrange (double min, double max) {
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_min_yval = min;
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_max_yval = max;
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}
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double get_max_y() const { return _max_yval; }
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double get_min_y() const { return _min_yval; }
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void truncate_end (double length);
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void truncate_start (double length);
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iterator begin() { return _events.begin(); }
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const_iterator begin() const { return _events.begin(); }
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iterator end() { return _events.end(); }
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const_iterator end() const { return _events.end(); }
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ControlEvent* back() { return _events.back(); }
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const ControlEvent* back() const { return _events.back(); }
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ControlEvent* front() { return _events.front(); }
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const ControlEvent* front() const { return _events.front(); }
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std::pair<ControlList::iterator,ControlList::iterator> control_points_adjacent (double when);
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template<class T> void apply_to_points (T& obj, void (T::*method)(const ControlList&)) {
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Glib::Mutex::Lock lm (_lock);
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(obj.*method)(*this);
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}
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void set_max_xval (double);
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double get_max_xval() const { return _max_xval; }
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double eval (double where) {
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Glib::Mutex::Lock lm (_lock);
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return unlocked_eval (where);
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}
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double rt_safe_eval (double where, bool& ok) {
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Glib::Mutex::Lock lm (_lock, Glib::TRY_LOCK);
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if ((ok = lm.locked())) {
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return unlocked_eval (where);
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} else {
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return 0.0;
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}
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}
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static inline bool time_comparator (const ControlEvent* a, const ControlEvent* b) {
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return a->when < b->when;
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}
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/** Lookup cache for eval functions, range contains equivalent values */
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struct LookupCache {
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LookupCache() : left(-1) {}
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double left; /* leftmost x coordinate used when finding "range" */
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std::pair<ControlList::const_iterator,ControlList::const_iterator> range;
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};
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/** Lookup cache for point finding, range contains points between left and right */
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struct SearchCache {
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SearchCache() : left(-1), right(-1) {}
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double left; /* leftmost x coordinate used when finding "range" */
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double right; /* rightmost x coordinate used when finding "range" */
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std::pair<ControlList::const_iterator,ControlList::const_iterator> range;
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};
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const EventList& events() const { return _events; }
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double default_value() const { return _parameter.normal(); }
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// FIXME: const violations for Curve
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Glib::Mutex& lock() const { return _lock; }
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LookupCache& lookup_cache() const { return _lookup_cache; }
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SearchCache& search_cache() const { return _search_cache; }
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/** Called by locked entry point and various private
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* locations where we already hold the lock.
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*
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* FIXME: Should this be private? Curve needs it..
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*/
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double unlocked_eval (double x) const;
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bool rt_safe_earliest_event (double start, double end, double& x, double& y, bool start_inclusive=false) const;
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bool rt_safe_earliest_event_unlocked (double start, double end, double& x, double& y, bool start_inclusive=false) const;
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Curve& curve() { return *_curve; }
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const Curve& curve() const { return *_curve; }
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virtual void mark_dirty () const;
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enum InterpolationStyle {
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Discrete,
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Linear,
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Curved
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};
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InterpolationStyle interpolation() const { return _interpolation; }
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void set_interpolation(InterpolationStyle style) { _interpolation = style; }
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protected:
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/** Called by unlocked_eval() to handle cases of 3 or more control points. */
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double multipoint_eval (double x) const;
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void build_search_cache_if_necessary(double start, double end) const;
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bool rt_safe_earliest_event_discrete_unlocked (double start, double end, double& x, double& y, bool inclusive) const;
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bool rt_safe_earliest_event_linear_unlocked (double start, double end, double& x, double& y, bool inclusive) const;
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boost::shared_ptr<ControlList> cut_copy_clear (double, double, int op);
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bool erase_range_internal (double start, double end, EventList &);
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virtual void maybe_signal_changed ();
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void _x_scale (double factor);
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mutable LookupCache _lookup_cache;
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mutable SearchCache _search_cache;
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Parameter _parameter;
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InterpolationStyle _interpolation;
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EventList _events;
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mutable Glib::Mutex _lock;
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int8_t _frozen;
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bool _changed_when_thawed;
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bool _new_value;
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double _max_xval;
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double _min_yval;
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double _max_yval;
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double _default_value;
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bool _sort_pending;
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iterator _rt_insertion_point;
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double _rt_pos;
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Curve* _curve;
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};
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} // namespace Evoral
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#endif // EVORAL_CONTROL_LIST_HPP
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