Richard Antalik
7afcfe111a
This patch makes it possible to manipulate strips without need to use update functions to recalculate effect and meta strips. Prior to this change function `SEQ_time_update_sequence` had to be used to update mainly effects and meta strips. This was implemented in a way that relied on sorted list of strips, which can't always be done and in rare cases this approach failed. In case of meta strips, `seqbase` had to be passed and compared with "active" one to determine whether meta strip should be updated or not. This is especially weak system that is prone to bugs when functions are used by python API functions. Finally, other strip types had startdisp` and `enddisp` fields updated by this function and a lot of code relied on these fields even if strip start, length and offsets are available. This is completely unnecessary. Implemented changes: All effects and meta strips are updated when strip handles are moved or strip is translated, without need to call any update function. Function `SEQ_time_update_sequence` has been split to `SEQ_time_update_meta_strip_range` and `seq_time_update_effects_strip_range`. These functions should be only used within sequencer module code. Meta update is used for versioning, which is only reason for it not being declared internally. Sequence fields `startdisp` and `enddisp` are now only used for effects to store strip start and end points. These fields should be used only internally within sequencer module code. Use function `SEQ_time_*_handle_frame_get` to get strip start and end points. To update effects and meta strips with reasonable performance, cache for "parent" meta strip and attached effects is added to `SequenceLookup` cache, so it shares invalidation mechanisms. All caches are populated during single iteration. There should be no functional changes. Differential Revision: https://developer.blender.org/D14990
51 lines
1.5 KiB
C++
51 lines
1.5 KiB
C++
/* SPDX-License-Identifier: GPL-2.0-or-later
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* Copyright 2004 Blender Foundation. All rights reserved. */
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#pragma once
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/** \file
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* \ingroup sequencer
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct Scene;
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struct Sequence;
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struct StripProxy;
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struct SeqCollection;
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/**
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* Cache must be freed before calling this function
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* since it leaves the seqbase in an invalid state.
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*/
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void seq_free_sequence_recurse(struct Scene *scene, struct Sequence *seq, bool do_id_user);
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struct StripProxy *seq_strip_proxy_alloc(void);
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/**
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* Find meta strip, that contains strip `key`.
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* If lookup hash doesn't exist, it will be created. If hash is tagged as invalid, it will be
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* rebuilt.
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*
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* \param scene: scene that owns lookup hash
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* \param key: pointer to Sequence inside of meta strip
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*
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* \return pointer to meta strip
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*/
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struct Sequence *seq_sequence_lookup_meta_by_seq(const struct Scene *scene,
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const struct Sequence *key);
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/**
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* Find effect strips, that use strip `seq` as one of inputs.
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* If lookup hash doesn't exist, it will be created. If hash is tagged as invalid, it will be
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* rebuilt.
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*
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* \param scene: scene that owns lookup hash
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* \param key: pointer to Sequence inside of meta strip
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*
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* \return collection of effect strips
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*/
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struct SeqCollection *seq_sequence_lookup_effects_by_seq(const struct Scene *scene,
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const struct Sequence *key);
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#ifdef __cplusplus
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}
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#endif
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