Sequencer: per-sequence modifier stack for color grading

This implements basic color grading modifiers in sequencer, supporting
color balance, RGB curves and HUE corrections.

Implementation is close to object modifiers, some details are there:

http://wiki.blender.org/index.php/User:Nazg-gul/SequencerModifiers

Modifiers supports multi-threaded calculation, masks and instant
parameter changes.

Also added cache for pre-processed image buffers for current frame,
so changing sequence properties does not require rendering of original
sequence (like rendering scene, loading file from disk and so)

1 files changed, 60 insertions, 1 deletions

diff --git a/source/blender/makesdna/DNA_sequence_types.h b/source/blender/makesdna/DNA_sequence_types.h
index 16e8b8904fa..d6c59456bd0 100644
--- a/source/blender/makesdna/DNA_sequence_types.h
+++ b/source/blender/makesdna/DNA_sequence_types.h
@@ -34,6 +34,7 @@
 #define __DNA_SEQUENCE_TYPES_H__
 
 #include "DNA_defs.h"
+#include "DNA_color_types.h"
 #include "DNA_listBase.h"
 #include "DNA_vec_types.h"
 
@@ -167,6 +168,9 @@ typedef struct Sequence {
 
 	/* is sfra needed anymore? - it looks like its only used in one place */
 	int sfra, pad;  /* starting frame according to the timeline of the scene. */
+
+	/* modifiers */
+	ListBase modifiers;
 } Sequence;
 
 typedef struct MetaStack {
@@ -229,6 +233,40 @@ typedef struct SpeedControlVars {
 	int lastValidFrame;
 } SpeedControlVars;
 
+/* ***************** Sequence modifiers ****************** */
+
+typedef struct SequenceModifierData {
+	struct SequenceModifierData *next, *prev;
+	int type, flag;
+	char name[64]; /* MAX_NAME */
+
+	/* mask input, either sequence or maks ID */
+	int mask_input_type, pad;
+
+	struct Sequence *mask_sequence;
+	struct Mask     *mask_id;
+} SequenceModifierData;
+
+typedef struct ColorBalanceModifierData {
+	SequenceModifierData modifier;
+
+	StripColorBalance color_balance;
+	float color_multiply;
+	int pad;
+} ColorBalanceModifierData;
+
+typedef struct CurvesModifierData {
+	SequenceModifierData modifier;
+
+	struct CurveMapping curve_mapping;
+} CurvesModifierData;
+
+typedef struct HueCorrectModifierData {
+	SequenceModifierData modifier;
+
+	struct CurveMapping curve_mapping;
+} HueCorrectModifierData;
+
 #define MAXSEQ          32
 
 #define SELECT 1
@@ -352,5 +390,26 @@ enum {
 
 #define SEQ_HAS_PATH(_seq) (ELEM4((_seq)->type, SEQ_TYPE_MOVIE, SEQ_TYPE_IMAGE, SEQ_TYPE_SOUND_RAM, SEQ_TYPE_SOUND_HD))
 
-#endif
+/* modifiers */
+
+/* SequenceModifierData->type */
+enum {
+	seqModifierType_ColorBalance   = 1,
+	seqModifierType_Curves         = 2,
+	seqModifierType_HueCorrect     = 3,
+
+	NUM_SEQUENCE_MODIFIER_TYPES
+};
+
+/* SequenceModifierData->flag */
+enum {
+	SEQUENCE_MODIFIER_MUTE      = (1 << 0),
+	SEQUENCE_MODIFIER_EXPANDED  = (1 << 1),
+};
+
+enum {
+	SEQUENCE_MASK_INPUT_STRIP   = 0,
+	SEQUENCE_MASK_INPUT_ID      = 1
+};
 
+#endif