/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * 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.
 *
 * Contributor(s): Blender Foundation (2008).
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#ifndef __BKE_SEQUENCER_H__
#define __BKE_SEQUENCER_H__

/** \file BKE_sequencer.h
 *  \ingroup bke
 */

struct bContext;
struct EvaluationContext;
struct StripColorBalance;
struct Editing;
struct ImBuf;
struct Main;
struct Mask;
struct MovieClip;
struct Scene;
struct Sequence;
struct SequenceModifierData;
struct Strip;
struct StripElem;
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

/* sequence iterator */

typedef struct SeqIterator {
	struct Sequence **array;
	int tot, cur;

	struct Sequence *seq;
	int valid;
} SeqIterator;

void BKE_sequence_iterator_begin(struct Editing *ed, SeqIterator *iter, bool use_pointer);
void BKE_sequence_iterator_next(SeqIterator *iter);
void BKE_sequence_iterator_end(SeqIterator *iter);

#define SEQP_BEGIN(_ed, _seq)                                                 \
	{                                                                         \
		SeqIterator iter_macro;                                               \
		for (BKE_sequence_iterator_begin(_ed, &iter_macro, true);             \
		     iter_macro.valid;                                                \
		     BKE_sequence_iterator_next(&iter_macro))                         \
		{                                                                     \
			_seq = iter_macro.seq;

#define SEQ_BEGIN(ed, _seq)                                                   \
	{                                                                         \
		SeqIterator iter_macro;                                               \
		for (BKE_sequence_iterator_begin(ed, &iter_macro, false);             \
		     iter_macro.valid;                                                \
		     BKE_sequence_iterator_next(&iter_macro))                         \
		{                                                                     \
			_seq = iter_macro.seq;

#define SEQ_END                                                               \
		}                                                                     \
		BKE_sequence_iterator_end(&iter_macro);                               \
	}

typedef struct SeqRenderData {
	struct EvaluationContext *eval_ctx;
	struct Main *bmain;
	struct Scene *scene;
	int rectx;
	int recty;
	int preview_render_size;
	int motion_blur_samples;
	float motion_blur_shutter;
	bool skip_cache;
	bool is_proxy_render;
} SeqRenderData;

SeqRenderData BKE_sequencer_new_render_data(struct EvaluationContext *eval_ctx, struct Main *bmain,
                                            struct Scene *scene, int rectx, int recty, int preview_render_size);

/* Wipe effect */
enum {
	DO_SINGLE_WIPE,
	DO_DOUBLE_WIPE,
	DO_BOX_WIPE,
	DO_CROSS_WIPE,
	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 *seq);
	
	/* duplicate */
	void (*copy)(struct Sequence *dst, struct Sequence *src);
	
	/* destruct */
	void (*free)(struct Sequence *seq);
	
	/* 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
 * ********************************************************************** */

struct ImBuf *BKE_sequencer_give_ibuf(const SeqRenderData *context, float cfra, int chanshown);
struct ImBuf *BKE_sequencer_give_ibuf_threaded(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);
void BKE_sequencer_give_ibuf_prefetch_request(const SeqRenderData *context, float cfra, int chan_shown);

/* **********************************************************************
 * 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
 * ********************************************************************** */
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);

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, struct Sequence **seq_act, 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_func)(struct Sequence *seq, void *), void *arg);
int BKE_sequencer_recursive_apply(struct Sequence *seq, int (*apply_func)(struct Sequence *, void *), void *arg);

/* maintenance functions, mostly for RNA */
/* extern  */

void BKE_sequencer_free_clipboard(void);

void BKE_sequence_clipboard_pointers_free(struct Sequence *seq);
void BKE_sequence_clipboard_pointers_store(struct Sequence *seq);
void BKE_sequence_clipboard_pointers_restore(struct Sequence *seq, struct Main *bmain);

void BKE_sequence_free(struct Scene *scene, struct Sequence *seq);
const char *BKE_sequence_give_name(struct Sequence *seq);
void BKE_sequence_calc(struct Scene *scene, struct Sequence *seq);
void BKE_sequence_calc_disp(struct Scene *scene, struct Sequence *seq);
void BKE_sequence_reload_new_file(struct Scene *scene, struct Sequence *seq, const bool lock_range);
int BKE_sequencer_evaluate_frame(struct Scene *scene, int cfra);

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);

struct SeqIndexBuildContext *BKE_sequencer_proxy_rebuild_context(struct Main *bmain, struct Scene *scene, struct Sequence *seq);
void BKE_sequencer_proxy_rebuild(struct SeqIndexBuildContext *context, short *stop, short *do_update, float *progress);
void BKE_sequencer_proxy_rebuild_finish(struct SeqIndexBuildContext *context, bool stop);

/* **********************************************************************
 * seqcache.c
 *
 * Sequencer memory cache management functions
 * ********************************************************************** */

typedef enum {
	SEQ_STRIPELEM_IBUF,
	SEQ_STRIPELEM_IBUF_COMP,
	SEQ_STRIPELEM_IBUF_STARTSTILL,
	SEQ_STRIPELEM_IBUF_ENDSTILL
} seq_stripelem_ibuf_t;

void BKE_sequencer_cache_destruct(void);
void BKE_sequencer_cache_cleanup(void);

/* returned ImBuf is properly refed and has to be freed */
struct ImBuf *BKE_sequencer_cache_get(const SeqRenderData *context, struct Sequence *seq, float cfra, seq_stripelem_ibuf_t type);

/* passed ImBuf is properly refed, so ownership is *not* 
 * transferred to the cache.
 * you can pass the same ImBuf multiple times to the cache without problems.
 */

void BKE_sequencer_cache_put(const SeqRenderData *context, struct Sequence *seq, float cfra, seq_stripelem_ibuf_t type, struct ImBuf *nval);

void BKE_sequencer_cache_cleanup_sequence(struct Sequence *seq);

struct ImBuf *BKE_sequencer_preprocessed_cache_get(const SeqRenderData *context, struct Sequence *seq, float cfra, seq_stripelem_ibuf_t type);
void BKE_sequencer_preprocessed_cache_put(const SeqRenderData *context, struct Sequence *seq, float cfra, seq_stripelem_ibuf_t type, struct ImBuf *ibuf);
void BKE_sequencer_preprocessed_cache_cleanup(void);
void BKE_sequencer_preprocessed_cache_cleanup_sequence(struct Sequence *seq);

/* **********************************************************************
 * seqeffects.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);

/* 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);

/* **********************************************************************
 * Sequencer editing functions
 * **********************************************************************
 */
   
/* for transform but also could use elsewhere */
int BKE_sequence_tx_get_final_left(struct Sequence *seq, bool metaclip);
int BKE_sequence_tx_get_final_right(struct Sequence *seq, bool metaclip);
void BKE_sequence_tx_set_final_left(struct Sequence *seq, int val);
void BKE_sequence_tx_set_final_right(struct Sequence *seq, int val);
void BKE_sequence_tx_handle_xlimits(struct Sequence *seq, int leftflag, int rightflag);
bool BKE_sequence_tx_test(struct Sequence *seq);
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);
struct Sequence *BKE_sequencer_foreground_frame_get(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(struct ListBase *seqbasep, struct Sequence *test, struct Scene *evil_scene);
bool BKE_sequence_base_shuffle_time(ListBase *seqbasep, struct Scene *evil_scene);
bool BKE_sequence_base_isolated_sel_check(struct ListBase *seqbase);
void BKE_sequencer_free_imbuf(struct Scene *scene, struct ListBase *seqbasep, bool for_render);
struct Sequence *BKE_sequence_dupli_recursive(struct Scene *scene, struct Scene *scene_to, 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(struct Scene *scene, struct Sequence *seq);
void BKE_sequence_invalidate_dependent(struct Scene *scene, struct Sequence *seq);
void BKE_sequence_invalidate_cache_for_modifier(struct Scene *scene, struct Sequence *seq);

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 Scene *scene);

void BKE_sequence_base_unique_name_recursive(ListBase *seqbasep, struct Sequence *seq);
void BKE_sequence_base_dupli_recursive(struct Scene *scene, struct Scene *scene_to, ListBase *nseqbase, ListBase *seqbase, int dupe_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);

/* api for adding new sequence strips */
typedef struct SeqLoadInfo {
	int start_frame;
	int end_frame;
	int channel;
	int flag;   /* use sound, replace sel */
	int type;
	int len;        /* only for image strips */
	char path[1024]; /* 1024 = FILE_MAX */

	/* return values */
	char name[64];
	struct Sequence *seq_sound;  /* for movie's */
	int tot_success;
	int tot_error;
} SeqLoadInfo;

/* SeqLoadInfo.flag */
#define SEQ_LOAD_REPLACE_SEL    (1 << 0)
#define SEQ_LOAD_FRAME_ADVANCE  (1 << 1)
#define SEQ_LOAD_MOVIE_SOUND    (1 << 2)
#define SEQ_LOAD_SOUND_CACHE    (1 << 3)


/* seq_dupli' flags */
#define SEQ_DUPE_UNIQUE_NAME    (1 << 0)
#define SEQ_DUPE_CONTEXT        (1 << 1)
#define SEQ_DUPE_ANIM           (1 << 2)
#define SEQ_DUPE_ALL            (1 << 3) /* otherwise only selected are copied */

/* use as an api function */
typedef struct Sequence *(*SeqLoadFunc)(struct bContext *, ListBase *, struct SeqLoadInfo *);

struct Sequence *BKE_sequence_alloc(ListBase *lb, int cfra, int machine);

void BKE_sequence_alpha_mode_from_extension(struct Sequence *seq);
void BKE_sequence_init_colorspace(struct Sequence *seq);

struct Sequence *BKE_sequencer_add_image_strip(struct bContext *C, ListBase *seqbasep, struct SeqLoadInfo *seq_load);
struct Sequence *BKE_sequencer_add_sound_strip(struct bContext *C, ListBase *seqbasep, struct SeqLoadInfo *seq_load);
struct Sequence *BKE_sequencer_add_movie_strip(struct bContext *C, ListBase *seqbasep, struct SeqLoadInfo *seq_load);

/* view3d draw callback, run when not in background view */
typedef struct ImBuf *(*SequencerDrawView)(struct Scene *, struct Object *, int, int, unsigned int, int, bool, bool, int, char[256]);
extern SequencerDrawView sequencer_view3d_cb;

/* copy/paste */
extern ListBase seqbase_clipboard;
extern int seqbase_clipboard_frame;

/* modifiers */
typedef struct SequenceModifierTypeInfo {
	/* default name for the modifier */
	char name[64];  /* MAX_NAME */

	/* DNA structure name used on load/save filed */
	char struct_name[64];  /* MAX_NAME */

	/* size of modifier data structure, used by allocation */
	int struct_size;

	/* data initialization */
	void (*init_data) (struct SequenceModifierData *smd);

	/* free data used by modifier,
	 * only modifier-specific data should be freed, modifier descriptor would
	 * be freed outside of this callback
	 */
	void (*free_data) (struct SequenceModifierData *smd);

	/* copy data from one modifier to another */
	void (*copy_data) (struct SequenceModifierData *smd, struct SequenceModifierData *target);

	/* apply modifier on a given image buffer */
	void (*apply) (struct SequenceModifierData *smd, struct ImBuf *ibuf, struct ImBuf *mask);
} SequenceModifierTypeInfo;

struct SequenceModifierTypeInfo *BKE_sequence_modifier_type_info_get(int type);

struct SequenceModifierData *BKE_sequence_modifier_new(struct Sequence *seq, const char *name, int type);
bool BKE_sequence_modifier_remove(struct Sequence *seq, struct SequenceModifierData *smd);
void BKE_sequence_modifier_clear(struct Sequence *seq);
void BKE_sequence_modifier_free(struct SequenceModifierData *smd);
void BKE_sequence_modifier_unique_name(struct Sequence *seq, struct SequenceModifierData *smd);
struct SequenceModifierData *BKE_sequence_modifier_find_by_name(struct Sequence *seq, const char *name);
struct ImBuf *BKE_sequence_modifier_apply_stack(const SeqRenderData *context, struct Sequence *seq, 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, bool make_float);
void BKE_sequencer_color_balance_apply(struct StripColorBalance *cb, struct ImBuf *ibuf, float mul, bool make_float, struct ImBuf *mask_input);

#endif  /* __BKE_SEQUENCER_H__ */
