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
47 lines
1.4 KiB
C++
47 lines
1.4 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 ListBase;
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struct Scene;
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struct Sequence;
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struct SeqCollection;
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float seq_give_frame_index(struct Sequence *seq, float timeline_frame);
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void seq_update_sound_bounds_recursive(const struct Scene *scene, struct Sequence *metaseq);
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/* Describes gap between strips in timeline. */
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typedef struct GapInfo {
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int gap_start_frame; /* Start frame of the gap. */
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int gap_length; /* Length of the gap. */
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bool gap_exists; /* False if there are no gaps. */
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} GapInfo;
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/**
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* Find first gap between strips after initial_frame and describe it by filling data of r_gap_info
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*
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* \param scene: Scene in which strips are located.
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* \param seqbase: ListBase in which strips are located.
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* \param initial_frame: frame on timeline from where gaps are searched for.
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* \param r_gap_info: data structure describing gap, that will be filled in by this function.
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*/
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void seq_time_gap_info_get(const struct Scene *scene,
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struct ListBase *seqbase,
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int initial_frame,
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struct GapInfo *r_gap_info);
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void seq_time_effect_range_set(Sequence *seq);
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void seq_time_update_effects_strip_range(const struct Scene *scene, struct SeqCollection *effects);
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#ifdef __cplusplus
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}
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#endif
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