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livetrax/libs/ardour/automation_list.cc

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/*
Copyright (C) 2002 Paul Davis
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <set>
#include <climits>
#include <float.h>
#include <cmath>
#include <sstream>
#include <algorithm>
#include "ardour/automation_list.h"
#include "ardour/event_type_map.h"
#include "evoral/Curve.hpp"
#include "pbd/stacktrace.h"
#include "pbd/enumwriter.h"
#include "i18n.h"
using namespace std;
using namespace ARDOUR;
using namespace PBD;
PBD::Signal1<void,AutomationList *> AutomationList::AutomationListCreated;
#if 0
static void dumpit (const AutomationList& al, string prefix = "")
{
cerr << prefix << &al << endl;
for (AutomationList::const_iterator i = al.begin(); i != al.end(); ++i) {
cerr << prefix << '\t' << (*i)->when << ',' << (*i)->value << endl;
}
cerr << "\n";
}
#endif
AutomationList::AutomationList (Evoral::Parameter id)
: ControlList(id)
{
_state = Off;
_style = Absolute;
g_atomic_int_set (&_touching, 0);
create_curve_if_necessary();
assert(_parameter.type() != NullAutomation);
AutomationListCreated(this);
}
AutomationList::AutomationList (const AutomationList& other)
: StatefulDestructible()
, ControlList(other)
{
_style = other._style;
_state = other._state;
g_atomic_int_set (&_touching, other.touching());
create_curve_if_necessary();
assert(_parameter.type() != NullAutomation);
AutomationListCreated(this);
}
AutomationList::AutomationList (const AutomationList& other, double start, double end)
: ControlList(other, start, end)
{
_style = other._style;
_state = other._state;
g_atomic_int_set (&_touching, other.touching());
create_curve_if_necessary();
assert(_parameter.type() != NullAutomation);
AutomationListCreated(this);
}
/** @param id is used for legacy sessions where the type is not present
* in or below the AutomationList node. It is used if @param id is non-null.
*/
AutomationList::AutomationList (const XMLNode& node, Evoral::Parameter id)
: ControlList(id)
{
g_atomic_int_set (&_touching, 0);
_state = Off;
_style = Absolute;
set_state (node, Stateful::loading_state_version);
if (id) {
_parameter = id;
}
create_curve_if_necessary();
assert(_parameter.type() != NullAutomation);
AutomationListCreated(this);
}
AutomationList::~AutomationList()
{
}
boost::shared_ptr<Evoral::ControlList>
AutomationList::create(Evoral::Parameter id)
{
return boost::shared_ptr<Evoral::ControlList>(new AutomationList(id));
}
void
AutomationList::create_curve_if_necessary()
{
switch (_parameter.type()) {
case GainAutomation:
case PanAzimuthAutomation:
case PanElevationAutomation:
case PanWidthAutomation:
case FadeInAutomation:
case FadeOutAutomation:
case EnvelopeAutomation:
create_curve();
break;
default:
break;
}
}
bool
AutomationList::operator== (const AutomationList& other)
{
return _events == other._events;
}
AutomationList&
AutomationList::operator= (const AutomationList& other)
{
if (this != &other) {
_events.clear ();
for (const_iterator i = other._events.begin(); i != other._events.end(); ++i) {
_events.push_back (new Evoral::ControlEvent (**i));
}
_min_yval = other._min_yval;
_max_yval = other._max_yval;
_max_xval = other._max_xval;
_default_value = other._default_value;
mark_dirty ();
maybe_signal_changed ();
}
return *this;
}
void
AutomationList::maybe_signal_changed ()
{
ControlList::maybe_signal_changed ();
if (!ControlList::frozen()) {
StateChanged (); /* EMIT SIGNAL */
}
}
void
AutomationList::set_automation_state (AutoState s)
{
if (s != _state) {
_state = s;
if (_state == Write) {
Glib::Mutex::Lock lm (ControlList::_lock);
nascent.push_back (new NascentInfo (false));
}
automation_state_changed (s); /* EMIT SIGNAL */
}
}
void
AutomationList::set_automation_style (AutoStyle s)
{
if (s != _style) {
_style = s;
automation_style_changed (); /* EMIT SIGNAL */
}
}
void
AutomationList::start_touch (double when)
{
if (_state == Touch) {
Glib::Mutex::Lock lm (ControlList::_lock);
nascent.push_back (new NascentInfo (true, when));
}
g_atomic_int_set (&_touching, 1);
}
void
AutomationList::stop_touch (bool mark, double when)
{
g_atomic_int_set (&_touching, 0);
if (_state == Touch) {
Glib::Mutex::Lock lm (ControlList::_lock);
if (mark) {
nascent.back()->end_time = when;
} else {
/* nascent info created in start touch but never used. just get rid of it.
*/
NascentInfo* ninfo = nascent.back ();
nascent.erase (nascent.begin());
delete ninfo;
}
}
}
void
AutomationList::thaw ()
{
ControlList::thaw();
if (_changed_when_thawed) {
_changed_when_thawed = false;
StateChanged(); /* EMIT SIGNAL */
}
}
XMLNode&
AutomationList::get_state ()
{
return state (true);
}
XMLNode&
AutomationList::state (bool full)
{
XMLNode* root = new XMLNode (X_("AutomationList"));
char buf[64];
LocaleGuard lg (X_("POSIX"));
root->add_property ("automation-id", EventTypeMap::instance().to_symbol(_parameter));
root->add_property ("id", _id.to_s());
snprintf (buf, sizeof (buf), "%.12g", _default_value);
root->add_property ("default", buf);
snprintf (buf, sizeof (buf), "%.12g", _min_yval);
root->add_property ("min-yval", buf);
snprintf (buf, sizeof (buf), "%.12g", _max_yval);
root->add_property ("max-yval", buf);
snprintf (buf, sizeof (buf), "%.12g", _max_xval);
root->add_property ("max-xval", buf);
root->add_property ("interpolation-style", enum_2_string (_interpolation));
if (full) {
/* never serialize state with Write enabled - too dangerous
for the user's data
*/
if (_state != Write) {
root->add_property ("state", auto_state_to_string (_state));
} else {
root->add_property ("state", auto_state_to_string (Off));
}
} else {
/* never save anything but Off for automation state to a template */
root->add_property ("state", auto_state_to_string (Off));
}
root->add_property ("style", auto_style_to_string (_style));
if (!_events.empty()) {
root->add_child_nocopy (serialize_events());
}
return *root;
}
XMLNode&
AutomationList::serialize_events ()
{
XMLNode* node = new XMLNode (X_("events"));
stringstream str;
str.precision(15); //10 digits is enough digits for 24 hours at 96kHz
for (iterator xx = _events.begin(); xx != _events.end(); ++xx) {
str << (double) (*xx)->when;
str << ' ';
str <<(double) (*xx)->value;
str << '\n';
}
/* XML is a bit wierd */
XMLNode* content_node = new XMLNode (X_("foo")); /* it gets renamed by libxml when we set content */
content_node->set_content (str.str());
node->add_child_nocopy (*content_node);
return *node;
}
int
AutomationList::deserialize_events (const XMLNode& node)
{
if (node.children().empty()) {
return -1;
}
XMLNode* content_node = node.children().front();
if (content_node->content().empty()) {
return -1;
}
ControlList::freeze ();
clear ();
stringstream str (content_node->content());
double x;
double y;
bool ok = true;
while (str) {
str >> x;
if (!str) {
break;
}
str >> y;
if (!str) {
ok = false;
break;
}
fast_simple_add (x, y);
}
if (!ok) {
clear ();
error << _("automation list: cannot load coordinates from XML, all points ignored") << endmsg;
} else {
mark_dirty ();
maybe_signal_changed ();
}
thaw ();
return 0;
}
int
AutomationList::set_state (const XMLNode& node, int version)
{
XMLNodeList nlist = node.children();
XMLNode* nsos;
XMLNodeIterator niter;
const XMLProperty* prop;
if (node.name() == X_("events")) {
/* partial state setting*/
return deserialize_events (node);
}
if (node.name() == X_("Envelope") || node.name() == X_("FadeOut") || node.name() == X_("FadeIn")) {
if ((nsos = node.child (X_("AutomationList")))) {
/* new school in old school clothing */
return set_state (*nsos, version);
}
/* old school */
const XMLNodeList& elist = node.children();
XMLNodeConstIterator i;
XMLProperty* prop;
pframes_t x;
double y;
ControlList::freeze ();
clear ();
for (i = elist.begin(); i != elist.end(); ++i) {
if ((prop = (*i)->property ("x")) == 0) {
error << _("automation list: no x-coordinate stored for control point (point ignored)") << endmsg;
continue;
}
x = atoi (prop->value().c_str());
if ((prop = (*i)->property ("y")) == 0) {
error << _("automation list: no y-coordinate stored for control point (point ignored)") << endmsg;
continue;
}
y = atof (prop->value().c_str());
fast_simple_add (x, y);
}
thaw ();
return 0;
}
if (node.name() != X_("AutomationList") ) {
error << string_compose (_("AutomationList: passed XML node called %1, not \"AutomationList\" - ignored"), node.name()) << endmsg;
return -1;
}
if ((prop = node.property ("id")) != 0) {
_id = prop->value ();
/* update session AL list */
AutomationListCreated(this);
}
if ((prop = node.property (X_("automation-id"))) != 0){
_parameter = EventTypeMap::instance().new_parameter(prop->value());
} else {
warning << "Legacy session: automation list has no automation-id property.";
}
if ((prop = node.property (X_("interpolation-style"))) != 0) {
_interpolation = (InterpolationStyle)string_2_enum(prop->value(), _interpolation);
} else {
_interpolation = Linear;
}
if ((prop = node.property (X_("default"))) != 0){
_default_value = atof (prop->value().c_str());
} else {
_default_value = 0.0;
}
if ((prop = node.property (X_("style"))) != 0) {
_style = string_to_auto_style (prop->value());
} else {
_style = Absolute;
}
if ((prop = node.property (X_("state"))) != 0) {
_state = string_to_auto_state (prop->value());
if (_state == Write) {
_state = Off;
}
} else {
_state = Off;
}
if ((prop = node.property (X_("min-yval"))) != 0) {
_min_yval = atof (prop->value ().c_str());
} else {
_min_yval = FLT_MIN;
}
if ((prop = node.property (X_("max-yval"))) != 0) {
_max_yval = atof (prop->value ().c_str());
} else {
_max_yval = FLT_MAX;
}
if ((prop = node.property (X_("max-xval"))) != 0) {
_max_xval = atof (prop->value ().c_str());
} else {
_max_xval = 0; // means "no limit ;
}
bool have_events = false;
for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
if ((*niter)->name() == X_("events")) {
deserialize_events (*(*niter));
have_events = true;
}
}
if (!have_events) {
/* there was no Events child node; clear any current events */
freeze ();
clear ();
mark_dirty ();
maybe_signal_changed ();
thaw ();
}
return 0;
}
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