Depsgraph: Initial work to cover sequencer

Just adds sequencer operation and links possible sound ID to it.

No functional changes, just moving towards sound system integration
into the dependency graph.

source/blender/depsgraph/intern/builder/deg_builder_nodes.cc

@@ -58,6 +58,7 @@ extern "C" {
 #include "DNA_lightprobe_types.h"
 #include "DNA_rigidbody_types.h"
 #include "DNA_scene_types.h"
+#include "DNA_sequence_types.h"
 #include "DNA_sound_types.h"
 #include "DNA_speaker_types.h"
 #include "DNA_texture_types.h"
@@ -89,6 +90,7 @@ extern "C" {
 #include "BKE_particle.h"
 #include "BKE_pointcache.h"
 #include "BKE_rigidbody.h"
+#include "BKE_sequencer.h"
 #include "BKE_shader_fx.h"
 #include "BKE_sound.h"
 #include "BKE_tracking.h"
@@ -1566,6 +1568,23 @@ void DepsgraphNodeBuilder::build_sound(bSound *sound)
   build_parameters(&sound->id);
 }
 
+void DepsgraphNodeBuilder::build_sequencer(Scene *scene)
+{
+  if (scene->ed == NULL) {
+    return;
+  }
+  add_operation_node(&scene->id, NodeType::SEQUENCER, OperationCode::SEQUENCES_EVAL);
+  /* Make sure data for sequences is in the graph. */
+  Sequence *seq;
+  SEQ_BEGIN (scene->ed, seq) {
+    if (seq->sound != NULL) {
+      build_sound(seq->sound);
+    }
+    /* TODO(sergey): Movie clip, scene, camera, mask. */
+  }
+  SEQ_END;
+}
+
 /* **** ID traversal callbacks functions **** */
 
 void DepsgraphNodeBuilder::modifier_walk(void *user_data,

source/blender/depsgraph/intern/builder/deg_builder_nodes.h

@@ -208,6 +208,7 @@ class DepsgraphNodeBuilder : public DepsgraphBuilder {
   void build_lightprobe(LightProbe *probe);
   void build_speaker(Speaker *speaker);
   void build_sound(bSound *sound);
+  void build_sequencer(Scene *scene);
 
   /* Per-ID information about what was already in the dependency graph.
    * Allows to re-use certain values, to speed up following evaluation. */

source/blender/depsgraph/intern/builder/deg_builder_nodes_view_layer.cc

@@ -152,6 +152,10 @@ void DepsgraphNodeBuilder::build_view_layer(Scene *scene,
       build_collection(NULL, fls->group);
     }
   }
+  /* Sequencer. */
+  if (linked_state == DEG_ID_LINKED_DIRECTLY) {
+    build_sequencer(scene);
+  }
   /* Collections. */
   add_operation_node(
       &scene->id,

source/blender/depsgraph/intern/builder/deg_builder_relations.cc

@@ -58,6 +58,7 @@ extern "C" {
 #include "DNA_object_types.h"
 #include "DNA_rigidbody_types.h"
 #include "DNA_scene_types.h"
+#include "DNA_sequence_types.h"
 #include "DNA_sound_types.h"
 #include "DNA_speaker_types.h"
 #include "DNA_texture_types.h"
@@ -84,6 +85,7 @@ extern "C" {
 #include "BKE_particle.h"
 #include "BKE_pointcache.h"
 #include "BKE_rigidbody.h"
+#include "BKE_sequencer.h"
 #include "BKE_shader_fx.h"
 #include "BKE_shrinkwrap.h"
 #include "BKE_sound.h"
@@ -2297,6 +2299,25 @@ void DepsgraphRelationBuilder::build_sound(bSound *sound)
   build_parameters(&sound->id);
 }
 
+void DepsgraphRelationBuilder::build_sequencer(Scene *scene)
+{
+  if (scene->ed == NULL) {
+    return;
+  }
+  /* Make sure dependnecies from sequences data goes to the sequencer evaluation. */
+  ComponentKey sequencer_key(&scene->id, NodeType::SEQUENCER);
+  Sequence *seq;
+  SEQ_BEGIN (scene->ed, seq) {
+    if (seq->sound != NULL) {
+      build_sound(seq->sound);
+      ComponentKey sound_key(&seq->sound->id, NodeType::AUDIO);
+      add_relation(sound_key, sequencer_key, "Sound -> Sequencer");
+    }
+    /* TODO(sergey): Movie clip, scene, camera, mask. */
+  }
+  SEQ_END;
+}
+
 void DepsgraphRelationBuilder::build_copy_on_write_relations()
 {
   for (IDNode *id_node : graph_->id_nodes) {

source/blender/depsgraph/intern/builder/deg_builder_relations.h

@@ -41,6 +41,7 @@
 #include "intern/builder/deg_builder_rna.h"
 #include "intern/depsgraph.h"
 #include "intern/node/deg_node.h"
+#include "intern/node/deg_node_id.h"
 #include "intern/node/deg_node_component.h"
 #include "intern/node/deg_node_operation.h"
 
@@ -195,7 +196,9 @@ class DepsgraphRelationBuilder : public DepsgraphBuilder {
 
   void build_id(ID *id);
   void build_layer_collections(ListBase *lb);
-  void build_view_layer(Scene *scene, ViewLayer *view_layer);
+  void build_view_layer(Scene *scene,
+                        ViewLayer *view_layer,
+                        eDepsNode_LinkedState_Type linked_state);
   void build_collection(LayerCollection *from_layer_collection,
                         Object *object,
                         Collection *collection);
@@ -266,6 +269,7 @@ class DepsgraphRelationBuilder : public DepsgraphBuilder {
   void build_lightprobe(LightProbe *probe);
   void build_speaker(Speaker *speaker);
   void build_sound(bSound *sound);
+  void build_sequencer(Scene *scene);
 
   void build_nested_datablock(ID *owner, ID *id);
   void build_nested_nodetree(ID *owner, bNodeTree *ntree);

source/blender/depsgraph/intern/builder/deg_builder_relations_view_layer.cc

@@ -75,7 +75,9 @@ void DepsgraphRelationBuilder::build_layer_collections(ListBase *lb)
   }
 }
 
-void DepsgraphRelationBuilder::build_view_layer(Scene *scene, ViewLayer *view_layer)
+void DepsgraphRelationBuilder::build_view_layer(Scene *scene,
+                                                ViewLayer *view_layer,
+                                                eDepsNode_LinkedState_Type linked_state)
 {
   /* Setup currently building context. */
   scene_ = scene;
@@ -128,10 +130,14 @@ void DepsgraphRelationBuilder::build_view_layer(Scene *scene, ViewLayer *view_la
       build_collection(NULL, NULL, fls->group);
     }
   }
+  /* Sequencer. */
+  if (linked_state == DEG_ID_LINKED_DIRECTLY) {
+    build_sequencer(scene);
+  }
   /* Build all set scenes. */
   if (scene->set != NULL) {
     ViewLayer *set_view_layer = BKE_view_layer_default_render(scene->set);
-    build_view_layer(scene->set, set_view_layer);
+    build_view_layer(scene->set, set_view_layer, DEG_ID_LINKED_VIA_SET);
   }
 }
 

source/blender/depsgraph/intern/depsgraph_build.cc

@@ -249,7 +249,7 @@ void DEG_graph_build_from_view_layer(Depsgraph *graph,
    * order. */
   DEG::DepsgraphRelationBuilder relation_builder(bmain, deg_graph, &builder_cache);
   relation_builder.begin_build();
-  relation_builder.build_view_layer(scene, view_layer);
+  relation_builder.build_view_layer(scene, view_layer, DEG::DEG_ID_LINKED_DIRECTLY);
   relation_builder.build_copy_on_write_relations();
   /* Detect and solve cycles. */
   DEG::deg_graph_detect_cycles(deg_graph);

source/blender/depsgraph/intern/node/deg_node_operation.cc

@@ -185,6 +185,9 @@ const char *operationCodeAsString(OperationCode opcode)
     /* Generic datablock. */
     case OperationCode::GENERIC_DATABLOCK_UPDATE:
       return "GENERIC_DATABLOCK_UPDATE";
+    /* Sequencer. */
+    case OperationCode::SEQUENCES_EVAL:
+      return "SEQUENCES_EVAL";
     /* instancing/duplication. */
     case OperationCode::DUPLI:
       return "DUPLI";

source/blender/depsgraph/intern/node/deg_node_operation.h

@@ -185,12 +185,16 @@ enum class OperationCode {
   /* Images. -------------------------------------------------------------- */
   IMAGE_ANIMATION,
 
-  /* Synchronization clips. ----------------------------------------------- */
+  /* Synchronization. ----------------------------------------------------- */
   SYNCHRONIZE_TO_ORIGINAL,
 
   /* Generic datablock ---------------------------------------------------- */
   GENERIC_DATABLOCK_UPDATE,
 
+  /* Sequencer. ----------------------------------------------------------- */
+
+  SEQUENCES_EVAL,
+
   /* Duplication/instancing system. --------------------------------------- */
   DUPLI,
 };