71 lines
3.3 KiB
C++
71 lines
3.3 KiB
C++
#pragma once
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// What the FX chains SHOULD be, derived from view state: an ordered per-track
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// work list plus its resolution against a live chain. Derived, never persisted
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// and never in an undo record — the park record's captured FX half is the only
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// persisted half. Pure: FX identities are opaque strings the shell reads from
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// REAPER (TrackFX_GetFXGUID) and hands in.
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#include <set>
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#include <string>
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#include <vector>
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#include "core/view/fx_offline.h"
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#include "core/view/view_mode_model.h"
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namespace reasampler::view {
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enum class FxWorkKind {
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Online, // back to the park record's captured per-FX state, verbatim
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Offline, // reclaim: every live FX offline
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};
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// One track's whole FX move. Track-granular so a drain may stop between tracks,
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// and resumable WITHIN a track by FX identity: a slot cursor would silently skip
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// or repeat a plugin if the chain were edited between two ticks.
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struct FxTrackWork {
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std::string trackGuid;
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FxWorkKind kind = FxWorkKind::Offline;
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// Online: the captured targets, verbatim — never a blanket "online", which is
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// exactly what would lose the plugins the USER had offline before the park.
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// Offline: empty. The live chain is the target set, and only the shell can
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// read it, so resolveFxWork synthesises the targets from what it is handed.
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std::vector<FxOfflineOp> targets;
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// Identity of the last FX this item's drain completed; empty ⇒ none yet. An
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// optimisation only: every write is compare-before-write, so an identity that
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// has since left the chain safely restarts the item rather than stranding it.
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std::string resumeAfterFxGuid;
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bool operator==(const FxTrackWork& o) const {
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return trackGuid == o.trackGuid && kind == o.kind && targets == o.targets &&
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resumeAfterFxGuid == o.resumeAfterFxGuid;
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}
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};
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// The whole project's FX work, from view state alone — no folder tree, because a
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// park record is only ever written for a track the planner already decided to
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// park (parents and show-both leaves never get one).
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//
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// ONLINE WORK SORTS FIRST: onlining restores state the user owns, offlining is
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// opportunistic reclaim that may be deferred indefinitely without losing
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// anything. Within a kind, GUID order — deterministic, so a drain's position in
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// the list survives a re-derivation.
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std::vector<FxTrackWork> desiredFxState(const ViewModeModel& model,
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const std::set<std::string>& liveTrackGuids);
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// One track's Online targets from its park record's FX half; empty when the
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// record holds none. Each target carries the record's keying, so a snapshot
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// lifted from a pre-identity project still restores by slot.
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std::vector<FxOfflineOp> fxRestoreTargets(const ViewModeModel& model,
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const std::string& trackGuid);
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// Resolves one work item against the chain as it stands, where `liveFxGuids[i]`
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// is the identity of the FX at slot `i` right now (empty when REAPER reported
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// none). Honors the resume point, then matches by identity: an identity that is
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// not live is DROPPED, never re-pointed at a slot.
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FxRestoreResolution resolveFxWork(const FxTrackWork& work,
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const std::vector<std::string>& liveFxGuids);
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} // namespace reasampler::view
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