Split BKE_sequencer.h intern/extern definitions

Intern definitions are moved to sequencer/intern/sequencer.h

BKE_sequencer.h was also cleaned up a bit to make sure that functions
and structs are in correct category.

Reviewed By: sergey

Differential Revision: https://developer.blender.org/D9259

8 files changed, 400 insertions, 283 deletions

diff --git a/source/blender/sequencer/BKE_sequencer.h b/source/blender/sequencer/BKE_sequencer.h
index 04be46f0ccf..90b1d611842 100644
--- a/source/blender/sequencer/BKE_sequencer.h
+++ b/source/blender/sequencer/BKE_sequencer.h
@@ -20,7 +20,7 @@
 #pragma once
 
 /** \file
- * \ingroup bke
+ * \ingroup sequencer
  */
 
 #ifdef __cplusplus
@@ -39,20 +39,37 @@ struct Scene;
 struct Sequence;
 struct SequenceModifierData;
 struct Stereo3dFormat;
-struct StripColorBalance;
 struct StripElem;
 struct TextVars;
 struct bContext;
 struct bSound;
-
 struct SeqIndexBuildContext;
 
-#define EARLY_NO_INPUT -1
-#define EARLY_DO_EFFECT 0
-#define EARLY_USE_INPUT_1 1
-#define EARLY_USE_INPUT_2 2
+/* Wipe effect */
+enum {
+  DO_SINGLE_WIPE,
+  DO_DOUBLE_WIPE,
+  /* DO_BOX_WIPE, */   /* UNUSED */
+  /* DO_CROSS_WIPE, */ /* UNUSED */
+  DO_IRIS_WIPE,
+  DO_CLOCK_WIPE,
+};
 
-/* sequence iterator */
+/* RNA enums, just to be more readable */
+enum {
+  SEQ_SIDE_NONE = 0,
+  SEQ_SIDE_LEFT,
+  SEQ_SIDE_RIGHT,
+  SEQ_SIDE_BOTH,
+  SEQ_SIDE_NO_CHANGE,
+};
+
+/* **********************************************************************
+ * sequencer.c
+ *
+ * Sequencer iterators
+ * **********************************************************************
+ */
 
 typedef struct SeqIterator {
   struct Sequence **array;
@@ -62,12 +79,6 @@ typedef struct SeqIterator {
   int valid;
 } SeqIterator;
 
-void BKE_sequence_iterator_begin(struct Editing *ed,
-                                 SeqIterator *iter,
-                                 const bool use_current_sequences);
-void BKE_sequence_iterator_next(SeqIterator *iter);
-void BKE_sequence_iterator_end(SeqIterator *iter);
-
 #define SEQ_ALL_BEGIN(ed, _seq) \
   { \
     SeqIterator iter_macro; \
@@ -90,6 +101,19 @@ void BKE_sequence_iterator_end(SeqIterator *iter);
 
 #define SEQ_CURRENT_END SEQ_ALL_END
 
+void BKE_sequence_iterator_begin(struct Editing *ed,
+                                 SeqIterator *iter,
+                                 const bool use_current_sequences);
+void BKE_sequence_iterator_next(SeqIterator *iter);
+void BKE_sequence_iterator_end(SeqIterator *iter);
+
+/* **********************************************************************
+ * sequencer.c
+ *
+ * Sequencer render functions
+ * **********************************************************************
+ */
+
 typedef enum eSeqTaskId {
   SEQ_TASK_MAIN_RENDER,
   SEQ_TASK_PREFETCH_RENDER,
@@ -118,6 +142,12 @@ typedef struct SeqRenderData {
   // bool gpu_full_samples;
 } SeqRenderData;
 
+struct ImBuf *BKE_sequencer_give_ibuf(const SeqRenderData *context, float cfra, int chanshown);
+struct ImBuf *BKE_sequencer_give_ibuf_direct(const SeqRenderData *context,
+                                             float cfra,
+                                             struct Sequence *seq);
+void BKE_sequence_alpha_mode_from_extension(struct Sequence *seq);
+void BKE_sequence_init_colorspace(struct Sequence *seq);
 void BKE_sequencer_new_render_data(struct Main *bmain,
                                    struct Depsgraph *depsgraph,
                                    struct Scene *scene,
@@ -127,132 +157,24 @@ void BKE_sequencer_new_render_data(struct Main *bmain,
                                    int for_render,
                                    SeqRenderData *r_context);
 
-int BKE_sequencer_cmp_time_startdisp(const void *a, const void *b);
-
-/* Wipe effect */
-enum {
-  DO_SINGLE_WIPE,
-  DO_DOUBLE_WIPE,
-  /* DO_BOX_WIPE, */   /* UNUSED */
-  /* DO_CROSS_WIPE, */ /* UNUSED */
-  DO_IRIS_WIPE,
-  DO_CLOCK_WIPE,
-};
-
-struct SeqEffectHandle {
-  bool multithreaded;
-  bool supports_mask;
-
-  /* constructors & destructor */
-  /* init is _only_ called on first creation */
-  void (*init)(struct Sequence *seq);
-
-  /* number of input strips needed
-   * (called directly after construction) */
-  int (*num_inputs)(void);
-
-  /* load is called first time after readblenfile in
-   * get_sequence_effect automatically */
-  void (*load)(struct Sequence *seqconst);
-
-  /* duplicate */
-  void (*copy)(struct Sequence *dst, struct Sequence *src, const int flag);
-
-  /* destruct */
-  void (*free)(struct Sequence *seq, const bool do_id_user);
-
-  /* returns: -1: no input needed,
-   * 0: no early out,
-   * 1: out = ibuf1,
-   * 2: out = ibuf2 */
-  int (*early_out)(struct Sequence *seq, float facf0, float facf1);
-
-  /* stores the y-range of the effect IPO */
-  void (*store_icu_yrange)(struct Sequence *seq, short adrcode, float *ymin, float *ymax);
-
-  /* stores the default facf0 and facf1 if no IPO is present */
-  void (*get_default_fac)(struct Sequence *seq, float cfra, float *facf0, float *facf1);
-
-  /* execute the effect
-   * sequence effects are only required to either support
-   * float-rects or byte-rects
-   * (mixed cases are handled one layer up...) */
-
-  struct ImBuf *(*execute)(const SeqRenderData *context,
-                           struct Sequence *seq,
-                           float cfra,
-                           float facf0,
-                           float facf1,
-                           struct ImBuf *ibuf1,
-                           struct ImBuf *ibuf2,
-                           struct ImBuf *ibuf3);
-
-  struct ImBuf *(*init_execution)(const SeqRenderData *context,
-                                  struct ImBuf *ibuf1,
-                                  struct ImBuf *ibuf2,
-                                  struct ImBuf *ibuf3);
-
-  void (*execute_slice)(const SeqRenderData *context,
-                        struct Sequence *seq,
-                        float cfra,
-                        float facf0,
-                        float facf1,
-                        struct ImBuf *ibuf1,
-                        struct ImBuf *ibuf2,
-                        struct ImBuf *ibuf3,
-                        int start_line,
-                        int total_lines,
-                        struct ImBuf *out);
-};
-
-/* ********************* prototypes *************** */
-
 /* **********************************************************************
  * sequencer.c
  *
- * sequencer render functions
+ * Sequencer color space functions
  * ********************************************************************** */
-double BKE_sequencer_rendersize_to_scale_factor(int size);
 
-struct ImBuf *BKE_sequencer_give_ibuf(const SeqRenderData *context, float cfra, int chanshown);
-struct ImBuf *BKE_sequencer_give_ibuf_direct(const SeqRenderData *context,
-                                             float cfra,
-                                             struct Sequence *seq);
-struct ImBuf *BKE_sequencer_give_ibuf_seqbase(const SeqRenderData *context,
-                                              float cfra,
-                                              int chan_shown,
-                                              struct ListBase *seqbasep);
-struct ImBuf *BKE_sequencer_effect_execute_threaded(struct SeqEffectHandle *sh,
-                                                    const SeqRenderData *context,
-                                                    struct Sequence *seq,
-                                                    float cfra,
-                                                    float facf0,
-                                                    float facf1,
-                                                    struct ImBuf *ibuf1,
-                                                    struct ImBuf *ibuf2,
-                                                    struct ImBuf *ibuf3);
-
-/* **********************************************************************
- * sequencer.c
- *
- * sequencer color space functions
- * ********************************************************************** */
-
-void BKE_sequencer_imbuf_to_sequencer_space(struct Scene *scene,
-                                            struct ImBuf *ibuf,
-                                            bool make_float);
 void BKE_sequencer_imbuf_from_sequencer_space(struct Scene *scene, struct ImBuf *ibuf);
 void BKE_sequencer_pixel_from_sequencer_space_v4(struct Scene *scene, float pixel[4]);
 
 /* **********************************************************************
- * sequencer scene functions
+ * sequencer.c
+ *
+ * Sequencer scene functions
  * ********************************************************************** */
 struct Editing *BKE_sequencer_editing_get(struct Scene *scene, bool alloc);
 struct Editing *BKE_sequencer_editing_ensure(struct Scene *scene);
 void BKE_sequencer_editing_free(struct Scene *scene, const bool do_id_user);
-
 void BKE_sequencer_sort(struct Scene *scene);
-
 struct Sequence *BKE_sequencer_from_elem(ListBase *seqbase, struct StripElem *se);
 struct Sequence *BKE_sequencer_active_get(struct Scene *scene);
 int BKE_sequencer_active_get_pair(struct Scene *scene,
@@ -260,7 +182,6 @@ int BKE_sequencer_active_get_pair(struct Scene *scene,
                                   struct Sequence **seq_other);
 void BKE_sequencer_active_set(struct Scene *scene, struct Sequence *seq);
 struct Mask *BKE_sequencer_mask_get(struct Scene *scene);
-
 /* apply functions recursively */
 int BKE_sequencer_base_recursive_apply(struct ListBase *seqbase,
                                        int (*apply_fn)(struct Sequence *seq, void *),
@@ -268,16 +189,14 @@ int BKE_sequencer_base_recursive_apply(struct ListBase *seqbase,
 int BKE_sequencer_recursive_apply(struct Sequence *seq,
                                   int (*apply_fn)(struct Sequence *, void *),
                                   void *arg);
-
+float BKE_sequence_get_fps(struct Scene *scene, struct Sequence *seq);
+int BKE_sequencer_find_next_prev_edit(struct Scene *scene,
+                                      int cfra,
+                                      const short side,
+                                      const bool do_skip_mute,
+                                      const bool do_center,
+                                      const bool do_unselected);
 /* maintenance functions, mostly for RNA */
-/* extern  */
-
-void BKE_sequencer_free_clipboard(void);
-
-void BKE_sequencer_base_clipboard_pointers_free(struct ListBase *seqbase);
-void BKE_sequencer_base_clipboard_pointers_store(struct Main *bmain, struct ListBase *seqbase);
-void BKE_sequencer_base_clipboard_pointers_restore(struct ListBase *seqbase, struct Main *bmain);
-
 void BKE_sequence_free(struct Scene *scene, struct Sequence *seq, const bool do_clean_animdata);
 void BKE_sequence_free_anim(struct Sequence *seq);
 const char *BKE_sequence_give_name(struct Sequence *seq);
@@ -294,22 +213,11 @@ void BKE_sequence_movie_reload_if_needed(struct Main *bmain,
                                          bool *r_was_reloaded,
                                          bool *r_can_produce_frames);
 int BKE_sequencer_evaluate_frame(struct Scene *scene, int cfra);
-int BKE_sequencer_get_shown_sequences(struct ListBase *seqbasep,
-                                      int cfra,
-                                      int chanshown,
-                                      struct Sequence **seq_arr_out);
-
 struct StripElem *BKE_sequencer_give_stripelem(struct Sequence *seq, int cfra);
-
-/* intern */
 void BKE_sequencer_update_changed_seq_and_deps(struct Scene *scene,
                                                struct Sequence *changed_seq,
                                                int len_change,
                                                int ibuf_change);
-bool BKE_sequencer_input_have_to_preprocess(const SeqRenderData *context,
-                                            struct Sequence *seq,
-                                            float cfra);
-
 bool BKE_sequencer_proxy_rebuild_context(struct Main *bmain,
                                          struct Depsgraph *depsgraph,
                                          struct Scene *scene,
@@ -321,45 +229,19 @@ void BKE_sequencer_proxy_rebuild(struct SeqIndexBuildContext *context,
                                  short *do_update,
                                  float *progress);
 void BKE_sequencer_proxy_rebuild_finish(struct SeqIndexBuildContext *context, bool stop);
-
 void BKE_sequencer_proxy_set(struct Sequence *seq, bool value);
+bool BKE_sequencer_check_scene_recursion(struct Scene *scene, struct ReportList *reports);
+bool BKE_sequencer_render_loop_check(struct Sequence *seq_main, struct Sequence *seq);
+int BKE_sequencer_cmp_time_startdisp(const void *a, const void *b);
+double BKE_sequencer_rendersize_to_scale_factor(int size);
+
 /* **********************************************************************
- * seqcache.c
+ * image_cache.c
  *
  * Sequencer memory cache management functions
  * ********************************************************************** */
 
-#define SEQ_CACHE_COST_MAX 10.0f
-
-struct ImBuf *BKE_sequencer_cache_get(const SeqRenderData *context,
-                                      struct Sequence *seq,
-                                      float cfra,
-                                      int type,
-                                      bool skip_disk_cache);
-void BKE_sequencer_cache_put(const SeqRenderData *context,
-                             struct Sequence *seq,
-                             float cfra,
-                             int type,
-                             struct ImBuf *i,
-                             float cost,
-                             bool skip_disk_cache);
-bool BKE_sequencer_cache_put_if_possible(const SeqRenderData *context,
-                                         struct Sequence *seq,
-                                         float cfra,
-                                         int type,
-                                         struct ImBuf *nval,
-                                         float cost,
-                                         bool skip_disk_cache);
-bool BKE_sequencer_cache_recycle_item(struct Scene *scene);
-void BKE_sequencer_cache_free_temp_cache(struct Scene *scene, short id, int cfra);
-void BKE_sequencer_cache_destruct(struct Scene *scene);
-void BKE_sequencer_cache_cleanup_all(struct Main *bmain);
 void BKE_sequencer_cache_cleanup(struct Scene *scene);
-void BKE_sequencer_cache_cleanup_sequence(struct Scene *scene,
-                                          struct Sequence *seq,
-                                          struct Sequence *seq_changed,
-                                          int invalidate_types,
-                                          bool force_seq_changed_range);
 void BKE_sequencer_cache_iterate(struct Scene *scene,
                                  void *userdata,
                                  bool callback_init(void *userdata, size_t item_count),
@@ -368,48 +250,21 @@ void BKE_sequencer_cache_iterate(struct Scene *scene,
                                                     int cfra,
                                                     int cache_type,
                                                     float cost));
-bool BKE_sequencer_cache_is_full(struct Scene *scene);
 
 /* **********************************************************************
- * seqprefetch.c
+ * prefetch.c
  *
  * Sequencer frame prefetching
  * ********************************************************************** */
 
-void BKE_sequencer_prefetch_start(const SeqRenderData *context, float cfra, float cost);
+#define SEQ_CACHE_COST_MAX 10.0f
 void BKE_sequencer_prefetch_stop_all(void);
 void BKE_sequencer_prefetch_stop(struct Scene *scene);
-void BKE_sequencer_prefetch_free(struct Scene *scene);
 bool BKE_sequencer_prefetch_need_redraw(struct Main *bmain, struct Scene *scene);
-bool BKE_sequencer_prefetch_job_is_running(struct Scene *scene);
-void BKE_sequencer_prefetch_get_time_range(struct Scene *scene, int *start, int *end);
-SeqRenderData *BKE_sequencer_prefetch_get_original_context(const SeqRenderData *context);
-struct Sequence *BKE_sequencer_prefetch_get_original_sequence(struct Sequence *seq,
-                                                              struct Scene *scene);
 
 /* **********************************************************************
- * seqeffects.c
+ * sequencer.c
  *
- * Sequencer effect strip management functions
- *  **********************************************************************
- */
-
-/* intern */
-struct SeqEffectHandle BKE_sequence_get_blend(struct Sequence *seq);
-void BKE_sequence_effect_speed_rebuild_map(struct Scene *scene, struct Sequence *seq, bool force);
-float BKE_sequencer_speed_effect_target_frame_get(const SeqRenderData *context,
-                                                  struct Sequence *seq,
-                                                  float cfra,
-                                                  int input);
-
-/* extern */
-struct SeqEffectHandle BKE_sequence_get_effect(struct Sequence *seq);
-int BKE_sequence_effect_get_num_inputs(int seq_type);
-int BKE_sequence_effect_get_supports_mask(int seq_type);
-void BKE_sequencer_text_font_unload(struct TextVars *data, const bool do_id_user);
-void BKE_sequencer_text_font_load(struct TextVars *data, const bool do_id_user);
-
-/* **********************************************************************
  * Sequencer editing functions
  * **********************************************************************
  */
@@ -426,13 +281,8 @@ bool BKE_sequence_single_check(struct Sequence *seq);
 void BKE_sequence_single_fix(struct Sequence *seq);
 bool BKE_sequence_test_overlap(struct ListBase *seqbasep, struct Sequence *test);
 void BKE_sequence_translate(struct Scene *scene, struct Sequence *seq, int delta);
-void BKE_sequence_sound_init(struct Scene *scene, struct Sequence *seq);
 const struct Sequence *BKE_sequencer_foreground_frame_get(const struct Scene *scene, int frame);
 struct ListBase *BKE_sequence_seqbase(struct ListBase *seqbase, struct Sequence *seq);
-struct Sequence *BKE_sequence_metastrip(ListBase *seqbase /* = ed->seqbase */,
-                                        struct Sequence *meta /* = NULL */,
-                                        struct Sequence *seq);
-
 void BKE_sequencer_offset_animdata(struct Scene *scene, struct Sequence *seq, int ofs);
 void BKE_sequencer_dupe_animdata(struct Scene *scene, const char *name_src, const char *name_dst);
 bool BKE_sequence_base_shuffle_ex(struct ListBase *seqbasep,
@@ -454,26 +304,11 @@ struct Sequence *BKE_sequence_dupli_recursive(const struct Scene *scene_src,
                                               struct Sequence *seq,
                                               int dupe_flag);
 int BKE_sequence_swap(struct Sequence *seq_a, struct Sequence *seq_b, const char **error_str);
-
-bool BKE_sequence_check_depend(struct Sequence *seq, struct Sequence *cur);
-void BKE_sequence_invalidate_cache_raw(struct Scene *scene, struct Sequence *seq);
-void BKE_sequence_invalidate_cache_preprocessed(struct Scene *scene, struct Sequence *seq);
-void BKE_sequence_invalidate_cache_composite(struct Scene *scene, struct Sequence *seq);
-void BKE_sequence_invalidate_dependent(struct Scene *scene, struct Sequence *seq);
-void BKE_sequence_invalidate_scene_strips(struct Main *bmain, struct Scene *scene_target);
-void BKE_sequence_invalidate_movieclip_strips(struct Main *bmain, struct MovieClip *clip_target);
-void BKE_sequence_invalidate_cache_in_range(struct Scene *scene,
-                                            struct Sequence *seq,
-                                            struct Sequence *range_mask,
-                                            int invalidate_types);
-
 void BKE_sequencer_update_sound_bounds_all(struct Scene *scene);
 void BKE_sequencer_update_sound_bounds(struct Scene *scene, struct Sequence *seq);
 void BKE_sequencer_update_muting(struct Editing *ed);
 void BKE_sequencer_update_sound(struct Scene *scene, struct bSound *sound);
-
 void BKE_sequencer_refresh_sound_length(struct Main *bmain, struct Scene *scene);
-
 void BKE_sequence_base_unique_name_recursive(ListBase *seqbasep, struct Sequence *seq);
 void BKE_sequence_base_dupli_recursive(const struct Scene *scene_src,
                                        struct Scene *scene_dst,
@@ -482,12 +317,39 @@ void BKE_sequence_base_dupli_recursive(const struct Scene *scene_src,
                                        int dupe_flag,
                                        const int flag);
 bool BKE_sequence_is_valid_check(struct Sequence *seq);
-
-void BKE_sequencer_clear_scene_in_allseqs(struct Main *bmain, struct Scene *sce);
-
 struct Sequence *BKE_sequence_get_by_name(struct ListBase *seqbase,
                                           const char *name,
                                           bool recursive);
+void BKE_sequencer_flag_for_removal(struct Scene *scene,
+                                    struct ListBase *seqbase,
+                                    struct Sequence *seq);
+void BKE_sequencer_remove_flagged_sequences(struct Scene *scene, struct ListBase *seqbase);
+
+/* **********************************************************************
+ * sequencer.c
+ *
+ * Cache invalidation
+ * **********************************************************************
+ */
+
+void BKE_sequence_invalidate_cache_raw(struct Scene *scene, struct Sequence *seq);
+void BKE_sequence_invalidate_cache_preprocessed(struct Scene *scene, struct Sequence *seq);
+void BKE_sequence_invalidate_cache_composite(struct Scene *scene, struct Sequence *seq);
+void BKE_sequence_invalidate_dependent(struct Scene *scene, struct Sequence *seq);
+void BKE_sequence_invalidate_scene_strips(struct Main *bmain, struct Scene *scene_target);
+void BKE_sequence_invalidate_movieclip_strips(struct Main *bmain, struct MovieClip *clip_target);
+void BKE_sequence_invalidate_cache_in_range(struct Scene *scene,
+                                            struct Sequence *seq,
+                                            struct Sequence *range_mask,
+                                            int invalidate_types);
+void BKE_sequencer_all_free_anim_ibufs(struct Scene *scene, int cfra);
+
+/* **********************************************************************
+ * sequencer.c
+ *
+ * Add strips
+ * **********************************************************************
+ */
 
 /* api for adding new sequence strips */
 typedef struct SeqLoadInfo {
@@ -529,31 +391,6 @@ typedef struct SeqLoadInfo {
 typedef struct Sequence *(*SeqLoadFn)(struct bContext *, ListBase *, struct SeqLoadInfo *);
 
 struct Sequence *BKE_sequence_alloc(ListBase *lb, int cfra, int machine, int type);
-
-/* Generate new UUID for the given sequence. */
-void BKE_sequence_session_uuid_generate(struct Sequence *sequence);
-
-void BKE_sequence_alpha_mode_from_extension(struct Sequence *seq);
-void BKE_sequence_init_colorspace(struct Sequence *seq);
-
-float BKE_sequence_get_fps(struct Scene *scene, struct Sequence *seq);
-float BKE_sequencer_give_stripelem_index(struct Sequence *seq, float cfra);
-
-/* RNA enums, just to be more readable */
-enum {
-  SEQ_SIDE_NONE = 0,
-  SEQ_SIDE_LEFT,
-  SEQ_SIDE_RIGHT,
-  SEQ_SIDE_BOTH,
-  SEQ_SIDE_NO_CHANGE,
-};
-int BKE_sequencer_find_next_prev_edit(struct Scene *scene,
-                                      int cfra,
-                                      const short side,
-                                      const bool do_skip_mute,
-                                      const bool do_center,
-                                      const bool do_unselected);
-
 struct Sequence *BKE_sequencer_add_image_strip(struct bContext *C,
                                                ListBase *seqbasep,
                                                struct SeqLoadInfo *seq_load);
@@ -564,11 +401,13 @@ struct Sequence *BKE_sequencer_add_movie_strip(struct bContext *C,
                                                ListBase *seqbasep,
                                                struct SeqLoadInfo *seq_load);
 
-/* copy/paste */
-extern ListBase seqbase_clipboard;
-extern int seqbase_clipboard_frame;
+/* **********************************************************************
+ * modifier.c
+ *
+ * Modifiers
+ * **********************************************************************
+ */
 
-/* modifiers */
 typedef struct SequenceModifierTypeInfo {
   /* default name for the modifier */
   char name[64]; /* MAX_NAME */
@@ -596,7 +435,6 @@ typedef struct SequenceModifierTypeInfo {
 } SequenceModifierTypeInfo;
 
 const struct SequenceModifierTypeInfo *BKE_sequence_modifier_type_info_get(int type);
-
 struct SequenceModifierData *BKE_sequence_modifier_new(struct Sequence *seq,
                                                        const char *name,
                                                        int type);
@@ -611,34 +449,111 @@ struct ImBuf *BKE_sequence_modifier_apply_stack(const SeqRenderData *context,
                                                 struct ImBuf *ibuf,
                                                 int cfra);
 void BKE_sequence_modifier_list_copy(struct Sequence *seqn, struct Sequence *seq);
-
 int BKE_sequence_supports_modifiers(struct Sequence *seq);
 
-/* internal filters */
-struct ImBuf *BKE_sequencer_render_mask_input(const SeqRenderData *context,
-                                              int mask_input_type,
-                                              struct Sequence *mask_sequence,
-                                              struct Mask *mask_id,
-                                              int cfra,
-                                              int fra_offset,
-                                              bool make_float);
-void BKE_sequencer_color_balance_apply(struct StripColorBalance *cb,
-                                       struct ImBuf *ibuf,
-                                       float mul,
-                                       bool make_float,
-                                       struct ImBuf *mask_input);
+/* **********************************************************************
+ * seqeffects.c
+ *
+ * Sequencer effect strip management functions
+ *  **********************************************************************
+ */
 
-void BKE_sequencer_all_free_anim_ibufs(struct Scene *scene, int cfra);
-bool BKE_sequencer_check_scene_recursion(struct Scene *scene, struct ReportList *reports);
-bool BKE_sequencer_render_loop_check(struct Sequence *seq_main, struct Sequence *seq);
-void BKE_sequencer_flag_for_removal(struct Scene *scene,
-                                    struct ListBase *seqbase,
-                                    struct Sequence *seq);
-void BKE_sequencer_remove_flagged_sequences(struct Scene *scene, struct ListBase *seqbase);
+struct SeqEffectHandle {
+  bool multithreaded;
+  bool supports_mask;
+
+  /* constructors & destructor */
+  /* init is _only_ called on first creation */
+  void (*init)(struct Sequence *seq);
+
+  /* number of input strips needed
+   * (called directly after construction) */
+  int (*num_inputs)(void);
+
+  /* load is called first time after readblenfile in
+   * get_sequence_effect automatically */
+  void (*load)(struct Sequence *seqconst);
+
+  /* duplicate */
+  void (*copy)(struct Sequence *dst, struct Sequence *src, const int flag);
+
+  /* destruct */
+  void (*free)(struct Sequence *seq, const bool do_id_user);
+
+  /* returns: -1: no input needed,
+   * 0: no early out,
+   * 1: out = ibuf1,
+   * 2: out = ibuf2 */
+  int (*early_out)(struct Sequence *seq, float facf0, float facf1);
+
+  /* stores the y-range of the effect IPO */
+  void (*store_icu_yrange)(struct Sequence *seq, short adrcode, float *ymin, float *ymax);
+
+  /* stores the default facf0 and facf1 if no IPO is present */
+  void (*get_default_fac)(struct Sequence *seq, float cfra, float *facf0, float *facf1);
+
+  /* execute the effect
+   * sequence effects are only required to either support
+   * float-rects or byte-rects
+   * (mixed cases are handled one layer up...) */
+
+  struct ImBuf *(*execute)(const SeqRenderData *context,
+                           struct Sequence *seq,
+                           float cfra,
+                           float facf0,
+                           float facf1,
+                           struct ImBuf *ibuf1,
+                           struct ImBuf *ibuf2,
+                           struct ImBuf *ibuf3);
+
+  struct ImBuf *(*init_execution)(const SeqRenderData *context,
+                                  struct ImBuf *ibuf1,
+                                  struct ImBuf *ibuf2,
+                                  struct ImBuf *ibuf3);
+
+  void (*execute_slice)(const SeqRenderData *context,
+                        struct Sequence *seq,
+                        float cfra,
+                        float facf0,
+                        float facf1,
+                        struct ImBuf *ibuf1,
+                        struct ImBuf *ibuf2,
+                        struct ImBuf *ibuf3,
+                        int start_line,
+                        int total_lines,
+                        struct ImBuf *out);
+};
+
+struct SeqEffectHandle BKE_sequence_get_effect(struct Sequence *seq);
+int BKE_sequence_effect_get_num_inputs(int seq_type);
+void BKE_sequencer_text_font_unload(struct TextVars *data, const bool do_id_user);
+void BKE_sequencer_text_font_load(struct TextVars *data, const bool do_id_user);
+
+/* **********************************************************************
+ * sequencer.c
+ *
+ * Clipboard
+ * **********************************************************************
+ */
+
+extern ListBase seqbase_clipboard;
+extern int seqbase_clipboard_frame;
+void BKE_sequencer_base_clipboard_pointers_store(struct Main *bmain, struct ListBase *seqbase);
+void BKE_sequencer_base_clipboard_pointers_restore(struct ListBase *seqbase, struct Main *bmain);
+void BKE_sequencer_free_clipboard(void);
+
+/* **********************************************************************
+ * sequencer.c
+ *
+ * Depsgraph
+ * **********************************************************************
+ */
 
 /* A debug and development function which checks whether sequences have unique UUIDs.
  * Errors will be reported to the console. */
 void BKE_sequencer_check_uuids_unique_and_report(const struct Scene *scene);
+/* Generate new UUID for the given sequence. */
+void BKE_sequence_session_uuid_generate(struct Sequence *sequence);
 
 #ifdef __cplusplus
 }
diff --git a/source/blender/sequencer/CMakeLists.txt b/source/blender/sequencer/CMakeLists.txt
index 866eba9ca41..84684987ca7 100644
--- a/source/blender/sequencer/CMakeLists.txt
+++ b/source/blender/sequencer/CMakeLists.txt
@@ -20,6 +20,7 @@
 
 set(INC
   .
+  intern
   ../blenkernel
   ../blenlib
   ../blentranslation
@@ -42,6 +43,7 @@ set(SRC
   BKE_sequencer.h
 
   intern/sequencer.c
+  intern/sequencer.h
   intern/image_cache.c
   intern/effects.c
   intern/modifier.c
diff --git a/source/blender/sequencer/intern/effects.c b/source/blender/sequencer/intern/effects.c
index b4bc2d25155..a05a69a522f 100644
--- a/source/blender/sequencer/intern/effects.c
+++ b/source/blender/sequencer/intern/effects.c
@@ -61,6 +61,8 @@
 
 #include "BLF_api.h"
 
+#include "sequencer.h"
+
 static struct SeqEffectHandle get_sequence_effect_impl(int seq_type);
 
 static void slice_get_byte_buffers(const SeqRenderData *context,
diff --git a/source/blender/sequencer/intern/image_cache.c b/source/blender/sequencer/intern/image_cache.c
index 7d2858050be..ea59625065b 100644
--- a/source/blender/sequencer/intern/image_cache.c
+++ b/source/blender/sequencer/intern/image_cache.c
@@ -49,6 +49,8 @@
 #include "BKE_scene.h"
 #include "BKE_sequencer.h"
 
+#include "sequencer.h"
+
 /**
  * Sequencer Cache Design Notes
  * ============================
diff --git a/source/blender/sequencer/intern/modifier.c b/source/blender/sequencer/intern/modifier.c
index a38fe252731..d31be56b036 100644
--- a/source/blender/sequencer/intern/modifier.c
+++ b/source/blender/sequencer/intern/modifier.c
@@ -45,6 +45,8 @@
 #include "IMB_imbuf.h"
 #include "IMB_imbuf_types.h"
 
+#include "sequencer.h"
+
 static SequenceModifierTypeInfo *modifiersTypes[NUM_SEQUENCE_MODIFIER_TYPES];
 static bool modifierTypesInit = false;
 
diff --git a/source/blender/sequencer/intern/prefetch.c b/source/blender/sequencer/intern/prefetch.c
index 65b2b6c02cf..c22fb3c4ad8 100644
--- a/source/blender/sequencer/intern/prefetch.c
+++ b/source/blender/sequencer/intern/prefetch.c
@@ -54,6 +54,8 @@
 #include "DEG_depsgraph_debug.h"
 #include "DEG_depsgraph_query.h"
 
+#include "sequencer.h"
+
 typedef struct PrefetchJob {
   struct PrefetchJob *next, *prev;
 
diff --git a/source/blender/sequencer/intern/sequencer.c b/source/blender/sequencer/intern/sequencer.c
index 068d836d1e6..acbdc28c6fd 100644
--- a/source/blender/sequencer/intern/sequencer.c
+++ b/source/blender/sequencer/intern/sequencer.c
@@ -96,6 +96,8 @@
 
 #include "RE_engine.h"
 
+#include "sequencer.h"
+
 #ifdef WITH_AUDASPACE
 #  include <AUD_Special.h>
 #endif
diff --git a/source/blender/sequencer/intern/sequencer.h b/source/blender/sequencer/intern/sequencer.h
new file mode 100644
index 00000000000..55e19f80fcd
--- /dev/null
+++ b/source/blender/sequencer/intern/sequencer.h
@@ -0,0 +1,190 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * The Original Code is Copyright (C) 2004 Blender Foundation.
+ * All rights reserved.
+ */
+
+#pragma once
+
+/** \file
+ * \ingroup sequencer
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct Editing;
+struct ImBuf;
+struct Main;
+struct Mask;
+struct Scene;
+struct Sequence;
+struct StripColorBalance;
+struct StripElem;
+
+#define EARLY_NO_INPUT -1
+#define EARLY_DO_EFFECT 0
+#define EARLY_USE_INPUT_1 1
+#define EARLY_USE_INPUT_2 2
+
+/* **********************************************************************
+ * sequencer.c
+ *
+ * sequencer render functions
+ * ********************************************************************** */
+
+struct ImBuf *BKE_sequencer_give_ibuf_seqbase(const SeqRenderData *context,
+                                              float cfra,
+                                              int chan_shown,
+                                              struct ListBase *seqbasep);
+struct ImBuf *BKE_sequencer_effect_execute_threaded(struct SeqEffectHandle *sh,
+                                                    const SeqRenderData *context,
+                                                    struct Sequence *seq,
+                                                    float cfra,
+                                                    float facf0,
+                                                    float facf1,
+                                                    struct ImBuf *ibuf1,
+                                                    struct ImBuf *ibuf2,
+                                                    struct ImBuf *ibuf3);
+struct ImBuf *BKE_sequencer_render_mask_input(const SeqRenderData *context,
+                                              int mask_input_type,
+                                              struct Sequence *mask_sequence,
+                                              struct Mask *mask_id,
+                                              int cfra,
+                                              int fra_offset,
+                                              bool make_float);
+void BKE_sequencer_color_balance_apply(struct StripColorBalance *cb,
+                                       struct ImBuf *ibuf,
+                                       float mul,
+                                       bool make_float,
+                                       struct ImBuf *mask_input);
+
+/* **********************************************************************
+ * sequencer.c
+ *
+ * sequencer color space functions
+ * ********************************************************************** */
+
+void BKE_sequencer_imbuf_to_sequencer_space(struct Scene *scene,
+                                            struct ImBuf *ibuf,
+                                            bool make_float);
+
+/* **********************************************************************
+ * sequencer.c
+ *
+ * sequencer scene functions
+ * ********************************************************************** */
+
+void BKE_sequencer_base_clipboard_pointers_free(struct ListBase *seqbase);
+int BKE_sequencer_get_shown_sequences(struct ListBase *seqbasep,
+                                      int cfra,
+                                      int chanshown,
+                                      struct Sequence **seq_arr_out);
+bool BKE_sequencer_input_have_to_preprocess(const SeqRenderData *context,
+                                            struct Sequence *seq,
+                                            float cfra);
+float BKE_sequencer_give_stripelem_index(struct Sequence *seq, float cfra);
+
+/* **********************************************************************
+ * image_cache.c
+ *
+ * Sequencer memory cache management functions
+ * ********************************************************************** */
+
+struct ImBuf *BKE_sequencer_cache_get(const SeqRenderData *context,
+                                      struct Sequence *seq,
+                                      float cfra,
+                                      int type,
+                                      bool skip_disk_cache);
+void BKE_sequencer_cache_put(const SeqRenderData *context,
+                             struct Sequence *seq,
+                             float cfra,
+                             int type,
+                             struct ImBuf *i,
+                             float cost,
+                             bool skip_disk_cache);
+bool BKE_sequencer_cache_put_if_possible(const SeqRenderData *context,
+                                         struct Sequence *seq,
+                                         float cfra,
+                                         int type,
+                                         struct ImBuf *nval,
+                                         float cost,
+                                         bool skip_disk_cache);
+bool BKE_sequencer_cache_recycle_item(struct Scene *scene);
+void BKE_sequencer_cache_free_temp_cache(struct Scene *scene, short id, int cfra);
+void BKE_sequencer_cache_destruct(struct Scene *scene);
+void BKE_sequencer_cache_cleanup_all(struct Main *bmain);
+void BKE_sequencer_cache_cleanup_sequence(struct Scene *scene,
+                                          struct Sequence *seq,
+                                          struct Sequence *seq_changed,
+                                          int invalidate_types,
+                                          bool force_seq_changed_range);
+bool BKE_sequencer_cache_is_full(struct Scene *scene);
+
+/* **********************************************************************
+ * prefetch.c
+ *
+ * Sequencer frame prefetching
+ * ********************************************************************** */
+
+void BKE_sequencer_prefetch_start(const SeqRenderData *context, float cfra, float cost);
+void BKE_sequencer_prefetch_free(struct Scene *scene);
+bool BKE_sequencer_prefetch_job_is_running(struct Scene *scene);
+void BKE_sequencer_prefetch_get_time_range(struct Scene *scene, int *start, int *end);
+SeqRenderData *BKE_sequencer_prefetch_get_original_context(const SeqRenderData *context);
+struct Sequence *BKE_sequencer_prefetch_get_original_sequence(struct Sequence *seq,
+                                                              struct Scene *scene);
+
+/* **********************************************************************
+ * seqeffects.c
+ *
+ * Sequencer effect strip management functions
+ *  **********************************************************************
+ */
+
+struct SeqEffectHandle BKE_sequence_get_blend(struct Sequence *seq);
+void BKE_sequence_effect_speed_rebuild_map(struct Scene *scene, struct Sequence *seq, bool force);
+float BKE_sequencer_speed_effect_target_frame_get(const SeqRenderData *context,
+                                                  struct Sequence *seq,
+                                                  float cfra,
+                                                  int input);
+
+/* **********************************************************************
+ * sequencer.c
+ *
+ * Sequencer editing functions
+ * **********************************************************************
+ */
+
+void BKE_sequence_sound_init(struct Scene *scene, struct Sequence *seq);
+struct Sequence *BKE_sequence_metastrip(ListBase *seqbase /* = ed->seqbase */,
+                                        struct Sequence *meta /* = NULL */,
+                                        struct Sequence *seq);
+
+/* **********************************************************************
+ * sequencer.c
+ *
+ * Unused
+ * **********************************************************************
+ */
+bool BKE_sequence_check_depend(struct Sequence *seq, struct Sequence *cur);
+void BKE_sequencer_clear_scene_in_allseqs(struct Main *bmain, struct Scene *sce);
+int BKE_sequence_effect_get_supports_mask(int seq_type);
+
+#ifdef __cplusplus
+}
+#endif