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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*!********************************************************************
Audacity: A Digital Audio Editor
TempoChange.cpp
PaulLicameli
**********************************************************************/
#include "TempoChange.h"
#include "Channel.h"
namespace {
struct ProjectTempo : ClientData::Cloneable<> {
~ProjectTempo() = default;
std::unique_ptr<ClientData::Cloneable<>> Clone() const override
{ return std::make_unique<ProjectTempo>(*this); }
static ProjectTempo &Get(ChannelGroup &group);
static const ProjectTempo &Get(const ChannelGroup &group);
std::optional<double> mProjectTempo;
};
const ChannelGroup::Attachments::RegisteredFactory
projectTempoDataFactory{
[](auto &) { return std::make_unique<ProjectTempo>(); } };
ProjectTempo &ProjectTempo::Get(ChannelGroup &group)
{
return group.Attachments::Get<ProjectTempo>(projectTempoDataFactory);
}
const ProjectTempo &ProjectTempo::Get(const ChannelGroup &group)
{
return Get(const_cast<ChannelGroup&>(group));
}
}
void DoProjectTempoChange(ChannelGroup &group, double newTempo)
{
auto &oldTempo = ProjectTempo::Get(group).mProjectTempo;
OnProjectTempoChange::Call(group, oldTempo, newTempo);
oldTempo = newTempo;
}
const std::optional<double>& GetProjectTempo(const ChannelGroup &group)
{
return ProjectTempo::Get(group).mProjectTempo;
}
DEFINE_ATTACHED_VIRTUAL(OnProjectTempoChange) {
return [](auto&, auto&, auto){ };
}
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