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livetrax/libs/evoral/evoral/ControlList.h

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/*
* Copyright (C) 2008-2012 Carl Hetherington <carl@carlh.net>
* Copyright (C) 2008-2014 Paul Davis <paul@linuxaudiosystems.com>
* Copyright (C) 2008-2015 David Robillard <d@drobilla.net>
* Copyright (C) 2012-2017 Robin Gareus <robin@gareus.org>
* Copyright (C) 2015 Nick Mainsbridge <mainsbridge@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef EVORAL_CONTROL_LIST_HPP
#define EVORAL_CONTROL_LIST_HPP
#include <cassert>
#include <list>
#include <stdint.h>
#include <boost/pool/pool.hpp>
#include <boost/pool/pool_alloc.hpp>
#include <glibmm/threads.h>
#include "pbd/signals.h"
#include "temporal/domain_provider.h"
#include "temporal/domain_swap.h"
#include "temporal/timeline.h"
#include "temporal/types.h"
#include "temporal/range.h"
#include "evoral/visibility.h"
#include "evoral/Parameter.h"
#include "evoral/ParameterDescriptor.h"
namespace Evoral {
class Curve;
class TypeMap;
/** A single event (time-stamped value) for a control
*/
class LIBEVORAL_API ControlEvent {
public:
ControlEvent (Temporal::timepos_t const & w, double v)
: when (w), value (v), coeff (0)
{}
ControlEvent (const ControlEvent& other)
: when (other.when), value (other.value), coeff (0)
{
if (other.coeff) {
create_coeffs();
for (size_t i = 0; i < 4; ++i)
coeff[i] = other.coeff[i];
}
}
~ControlEvent() { if (coeff) delete[] coeff; }
void create_coeffs() {
if (!coeff)
coeff = new double[4];
coeff[0] = coeff[1] = coeff[2] = coeff[3] = 0.0;
}
Temporal::timepos_t when;
double value;
double* coeff; ///< double[4] allocated by Curve as needed
};
/** A list (sequence) of time-stamped values for a control
*/
class LIBEVORAL_API ControlList : public Temporal::TimeDomainProvider, public Temporal::TimeDomainSwapper
{
public:
typedef std::list<ControlEvent*> EventList;
typedef EventList::iterator iterator;
typedef EventList::reverse_iterator reverse_iterator;
typedef EventList::const_iterator const_iterator;
typedef EventList::const_reverse_iterator const_reverse_iterator;
ControlList (const Parameter& id, const ParameterDescriptor& desc, Temporal::TimeDomainProvider const &);
ControlList (const ControlList&, Temporal::timepos_t const & start, Temporal::timepos_t const & end);
ControlList (const ControlList&);
virtual ~ControlList();
virtual std::shared_ptr<ControlList> create(const Parameter& id, const ParameterDescriptor& desc, Temporal::TimeDomainProvider const &);
void dump (std::ostream&);
ControlList& operator= (const ControlList&);
bool operator== (const ControlList&);
void copy_events (const ControlList&);
virtual void freeze();
virtual void thaw ();
bool frozen() const { return _frozen; }
const Parameter& parameter() const { return _parameter; }
void set_parameter(const Parameter& p) { _parameter = p; }
const ParameterDescriptor& descriptor() const { return _desc; }
void set_descriptor(const ParameterDescriptor& d) { _desc = d; }
EventList::size_type size() const { return _events.size(); }
/** @return time-stamp of first or last event in the list */
Temporal::timepos_t when (bool at_start) const {
Glib::Threads::RWLock::ReaderLock lm (_lock);
if (_events.empty()) {
return std::numeric_limits<Temporal::timepos_t>::min();
}
return at_start ? _events.front()->when : _events.back()->when;
}
Temporal::timecnt_t length() const {
Glib::Threads::RWLock::ReaderLock lm (_lock);
return _events.empty() ? std::numeric_limits<Temporal::timecnt_t>::min() : Temporal::timecnt_t (_events.back()->when);
}
bool empty() const { return _events.empty(); }
/** Remove all events from this list. */
void clear ();
void x_scale (Temporal::ratio_t const &);
bool extend_to (Temporal::timepos_t const & );
void slide (iterator before, Temporal::timecnt_t const & distance);
void shift (Temporal::timepos_t const & before, Temporal::timecnt_t const & distance);
void y_transform (boost::function<double(double)> callback);
void list_merge (ControlList const& other, boost::function<double(double, double)> callback);
/** Add an event to this list.
*
* This method is intended to write automation in realtime. If the transport
* is stopped, guard-points will be added regardless of parameter with_guards.
*
* @param when absolute time in samples
* @param value parameter value
* @param with_guards if true, add guard-points
* @param with_initial if true, add an initial point if the list is empty
*/
virtual void add (Temporal::timepos_t const & when, double value, bool with_guards=true, bool with_initial=true);
/** Add an event to this list.
*
* This method is intended for making manual changes from the GUI. An event
* will only be created if no other event exists at the given time.
*
* @param when absolute time in samples
* @param value parameter value
* @param with_guards if true, add guard-points
*
* @return true if an event was added.
*/
virtual bool editor_add (Temporal::timepos_t const & when, double value, bool with_guard);
struct OrderedPoint {
Temporal::timepos_t when;
double value;
OrderedPoint (Temporal::timepos_t const & t, double v) : when (t), value (v) {}
};
typedef std::vector<OrderedPoint> OrderedPoints;
virtual bool editor_add_ordered (OrderedPoints const &, bool with_guard);
/* to be used only for loading pre-sorted data from saved state */
void fast_simple_add (Temporal::timepos_t const & when, double value);
void erase_range (Temporal::timepos_t const & start , Temporal::timepos_t const & end);
void erase (iterator);
void erase (iterator, iterator);
void erase (Temporal::timepos_t const &, double);
bool move_ranges (std::list<Temporal::RangeMove> const &);
void modify (iterator, Temporal::timepos_t const &, double);
/** Thin the number of events in this list.
*
* The thinning factor corresponds to the area of a triangle computed
* between three points in the list (time-difference * value-difference).
* If the area is large, it indicates significant non-linearity between
* the points.
*
* Time is measured in samples, value is usually normalized to 0..1.
*
* During automation recording we thin the recorded points using this
* value. If a point is sufficiently co-linear with its neighbours (as
* defined by the area of the triangle formed by three of them), we will
* not include it in the list. The larger the value, the more points are
* excluded, so this effectively measures the amount of thinning to be
* done.
*
* @param thinning_factor area-size (default: 20)
*/
void thin (double thinning_factor);
std::shared_ptr<ControlList> cut (Temporal::timepos_t const &, Temporal::timepos_t const &);
std::shared_ptr<ControlList> copy (Temporal::timepos_t const &, Temporal::timepos_t const &);
/** Remove all events in the given time range from this list.
*
* @param start start of range (inclusive) in audio samples
* @param end end of range (inclusive) in audio samples
*/
void clear (Temporal::timepos_t const &, Temporal::timepos_t const &);
bool paste (const ControlList&, Temporal::timepos_t const &);
/** Remove all events after the given time from this list.
*
* @param last_coordinate time in audio samples of the last event to keep
*/
void truncate_end (Temporal::timepos_t const & last_coordinate);
/** Remove all events up to to the given time from this list.
*
* @param overall_length overall length
*/
void truncate_start (Temporal::timecnt_t const & overall_length);
iterator begin() { return _events.begin(); }
const_iterator begin() const { return _events.begin(); }
iterator end() { return _events.end(); }
const_iterator end() const { return _events.end(); }
reverse_iterator rbegin() { return _events.rbegin(); }
const_reverse_iterator rbegin() const { return _events.rbegin(); }
reverse_iterator rend() { return _events.rend(); }
const_reverse_iterator rend() const { return _events.rend(); }
ControlEvent* back() { return _events.back(); }
const ControlEvent* back() const { return _events.back(); }
ControlEvent* front() { return _events.front(); }
const ControlEvent* front() const { return _events.front(); }
std::pair<ControlList::iterator,ControlList::iterator> control_points_adjacent (Temporal::timepos_t const & when);
template<class T> void apply_to_points (T& obj, void (T::*method)(const ControlList&)) {
Glib::Threads::RWLock::WriterLock lm (_lock);
(obj.*method)(*this);
}
/** Queries the event value at the given time (takes a read-lock, not safe
* while writing automation).
*
* @param where absolute time in samples
* @returns parameter value
*/
double eval (Temporal::timepos_t const & where) const {
Glib::Threads::RWLock::ReaderLock lm (_lock);
return unlocked_eval (where);
}
/** Realtime safe version of eval(). This may fail if a read-lock cannot
* be taken.
*
* @param where absolute time in samples
* @param ok boolean reference if returned value is valid
* @returns parameter value
*/
double rt_safe_eval (Temporal::timepos_t const & where, bool& ok) const {
Glib::Threads::RWLock::ReaderLock lm (_lock, Glib::Threads::TRY_LOCK);
if ((ok = lm.locked())) {
return unlocked_eval (where);
} else {
return 0.0;
}
}
static inline bool time_comparator (const ControlEvent* a, const ControlEvent* b) {
return a->when < b->when;
}
/** Lookup cache for eval functions, range contains equivalent values */
struct LookupCache {
LookupCache() : left (std::numeric_limits<Temporal::timepos_t>::max()) {}
Temporal::timepos_t left; /* leftmost x coordinate used when finding "range" */
std::pair<ControlList::const_iterator,ControlList::const_iterator> range;
};
/** Lookup cache for point finding, range contains points after left */
struct SearchCache {
SearchCache () : left (std::numeric_limits<Temporal::timepos_t>::max()) {}
Temporal::timepos_t left; /* leftmost x coordinate used when finding "first" */
ControlList::const_iterator first;
};
/** @return the list of events */
const EventList& events() const { return _events; }
// FIXME: const violations for Curve
Glib::Threads::RWLock& lock() const { return _lock; }
LookupCache& lookup_cache() const { return _lookup_cache; }
SearchCache& search_cache() const { return _search_cache; }
/** Called by locked entry point and various private
* locations where we already hold the lock.
*
* FIXME: Should this be private? Curve needs it..
*/
double unlocked_eval (Temporal::timepos_t const & x) const;
bool rt_safe_earliest_event_discrete_unlocked (Temporal::timepos_t const & start, Temporal::timepos_t & x, double& y, bool inclusive) const;
bool rt_safe_earliest_event_linear_unlocked (Temporal::timepos_t const & start, Temporal::timepos_t & x, double& y, bool inclusive, Temporal::timecnt_t min_x_delta = Temporal::timecnt_t::max()) const;
void create_curve();
void destroy_curve();
Curve& curve() { assert(_curve); return *_curve; }
const Curve& curve() const { assert(_curve); return *_curve; }
void mark_dirty () const;
enum InterpolationStyle {
Discrete,
Linear,
Curved, // spline, used for x-fades
Logarithmic,
Exponential // fader, gain
};
/** query interpolation style of the automation data
* @returns Interpolation Style
*/
InterpolationStyle interpolation() const { return _interpolation; }
/** query default interpolation for parameter-descriptor */
virtual InterpolationStyle default_interpolation() const;
/** Sets the interpolation style of the automation data.
*
* This will fail when asking for Logarithmic scale and min,max crosses 0
* or Exponential scale with min != 0.
*
* @param is interpolation style
* @returns true if style change was successful
*/
bool set_interpolation (InterpolationStyle is);
virtual bool touching() const { return false; }
virtual bool writing() const { return false; }
virtual bool touch_enabled() const { return false; }
void start_write_pass (Temporal::timepos_t const &);
void write_pass_finished (Temporal::timepos_t const &, double thinning_factor=0.0);
void set_in_write_pass (bool, bool add_point = false, Temporal::timepos_t = std::numeric_limits<Temporal::timepos_t>::min());
/** @return true if transport is running and this list is in write mode */
bool in_write_pass () const;
bool in_new_write_pass () { return new_write_pass; }
PBD::Signal0<void> WritePassStarted;
/** Emitted when mark_dirty() is called on this object */
mutable PBD::Signal0<void> Dirty;
/** Emitted when our interpolation style changes */
PBD::Signal1<void, InterpolationStyle> InterpolationChanged;
bool operator!= (ControlList const &) const;
void invalidate_insert_iterator ();
void start_domain_bounce (Temporal::DomainBounceInfo&);
void finish_domain_bounce (Temporal::DomainBounceInfo&);
protected:
/** Called by unlocked_eval() to handle cases of 3 or more control points. */
double multipoint_eval (Temporal::timepos_t const & x) const;
void build_search_cache_if_necessary (Temporal::timepos_t const & start) const;
std::shared_ptr<ControlList> cut_copy_clear (Temporal::timepos_t const &, Temporal::timepos_t const &, int op);
bool erase_range_internal (Temporal::timepos_t const & start, Temporal::timepos_t const & end, EventList &);
void maybe_add_insert_guard (Temporal::timepos_t const & when);
iterator erase_from_iterator_to (iterator iter, Temporal::timepos_t const & when);
bool maybe_insert_straight_line (Temporal::timepos_t const & when, double value);
virtual void maybe_signal_changed ();
void _x_scale (Temporal::ratio_t const &);
mutable LookupCache _lookup_cache;
mutable SearchCache _search_cache;
mutable Glib::Threads::RWLock _lock;
Parameter _parameter;
ParameterDescriptor _desc;
InterpolationStyle _interpolation;
EventList _events;
int8_t _frozen;
bool _changed_when_thawed;
bool _sort_pending;
Curve* _curve;
private:
iterator most_recent_insert_iterator;
Temporal::timepos_t insert_position;
bool new_write_pass;
bool did_write_during_pass;
bool _in_write_pass;
void unlocked_remove_duplicates ();
void unlocked_invalidate_insert_iterator ();
void add_guard_point (Temporal::timepos_t const & when, Temporal::timecnt_t const & offset);
bool is_sorted () const;
Temporal::timepos_t ensure_time_domain (Temporal::timepos_t const & ) const;
};
} // namespace Evoral
#endif // EVORAL_CONTROL_LIST_HPP
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