Method RemoveUnusedInstruments

Source/FamiTrackerModule.cpp:410–450

}

void CFamiTrackerModule::RemoveUnusedInstruments() {
	bool used[MAX_INSTRUMENTS] = { };		// // //

	VisitSongs([&] (const CSongData &song) {		// // //
		int length = song.GetPatternLength();
		GetChannelOrder().ForeachChannel([&] (stChannelID Channel) {
			for (unsigned int Frame = 0; Frame < song.GetFrameCount(); ++Frame)
				song.GetPatternOnFrame(Channel, Frame).VisitRows(length, [&] (const stChanNote &note) {
					if (note.Instrument < MAX_INSTRUMENTS)
						used[note.Instrument] = true;
				});
		});
	});

	auto *pManager = GetInstrumentManager();

	pManager->VisitInstruments([&] (CInstrument &, std::size_t i) {
		if (!used[i])
			pManager->RemoveInstrument(i);
	});

	const inst_type_t inst[] = {INST_2A03, INST_VRC6, INST_N163, INST_S5B};

	// Also remove unused sequences
	for (unsigned int i = 0; i < MAX_SEQUENCES; ++i)
		for (auto j : enum_values<sequence_t>())		// // //
			for (auto c : inst)
				if (auto pSeq = pManager->GetSequence(c, j, i); pSeq && pSeq->GetItemCount() > 0) {		// // //
					bool Used = false;
					for (int k = 0; k < MAX_INSTRUMENTS; ++k) {
						if (pManager->HasInstrument(k) && pManager->GetInstrumentType(k) == c) {
							auto pInstrument = std::static_pointer_cast<CSeqInstrument>(pManager->GetInstrument(k));
							if (pInstrument->GetSeqIndex(j) == i && pInstrument->GetSeqEnable(j)) {		// // //
								Used = true; break;
							}
						}
					}
					if (!Used)
						pSeq->Clear();		// // //
				}
}

void CFamiTrackerModule::RemoveUnusedDSamples() {
	bool AssignUsed[MAX_INSTRUMENTS][NOTE_COUNT] = { };