lib: start re-weaving implementation

lib/core.cpp

@@ -65,7 +65,7 @@ void Core::DeleteChildren()
   }
 }
 
-size_t Core::IndexOfChild(Core *chunk)
+size_t Core::IndexOfChild(Core *chunk) const
 {
   return std::find(children_.begin(), children_.end(), chunk) - children_.begin();
 }

lib/core.h

@@ -21,11 +21,12 @@ public:
 
   bool FindParent(Core *p) const;
 
-  LIBWEAVER_EXPORT void AppendChild(Core *Core);
-  LIBWEAVER_EXPORT bool RemoveChild(Core *Core);
-  LIBWEAVER_EXPORT size_t IndexOfChild(Core *Core);
-  LIBWEAVER_EXPORT void InsertChild(size_t index, Core *Core);
-  LIBWEAVER_EXPORT Core *RemoveChild(size_t index);
+  void AppendChild(Core *Core);
+  bool RemoveChild(Core *Core);
+  void InsertChild(size_t index, Core *Core);
+  Core *RemoveChild(size_t index);
+
+  LIBWEAVER_EXPORT size_t IndexOfChild(Core *Core) const;
   LIBWEAVER_EXPORT Core *GetChildAt(size_t index) const { return children_.at(index); }
   LIBWEAVER_EXPORT size_t GetChildCount() const { return children_.size(); }
   LIBWEAVER_EXPORT bool HasChildren() const { return !children_.empty(); }

lib/interleaf.cpp

@@ -46,14 +46,139 @@ bool Interleaf::Parse(Chunk *riff)
         return false;
       }
     } else {
-      //Object *nullobj = new Object();
-      //AppendChild(nullobj);
+      Object *nullobj = new Object();
+      AppendChild(nullobj);
     }
   }
 
   return true;
 }
 
+struct ChunkStatus {
+  ChunkStatus()
+  {
+    index = 0;
+    time = 0;
+  }
+
+  size_t index;
+  uint32_t time;
+};
+
+Chunk *Interleaf::Export() const
+{
+  Chunk *riff = new Chunk(Chunk::TYPE_RIFF);
+  riff->data("Format") = RIFF::OMNI;
+
+  Chunk *mxhd = new Chunk(Chunk::TYPE_MxHd);
+  mxhd->data("Version") = version_;
+  mxhd->data("BufferSize") = buffer_size_;
+  mxhd->data("BufferCount") = buffer_count_;
+  riff->AppendChild(mxhd);
+
+  Chunk *mxof = new Chunk(Chunk::TYPE_MxOf);
+
+  // FIXME: This appears to not always be correct, sometimes an MxOf with only one entry will have
+  //        a count of 3, seemingly due to embedded objects (e.g. a movie with an SMK + WAV)?
+  uint32_t obj_count = this->GetChildCount();
+  for (Children::const_iterator it=GetChildren().begin(); it!=GetChildren().end(); it++) {
+    Object *obj = static_cast<Object*>(*it);
+    obj_count += obj->GetChildCount();
+  }
+  mxof->data("Count") = obj_count;
+
+  //        This however is correct.
+  mxof->data("Offsets") = bytearray(this->GetChildCount() * sizeof(uint32_t));
+
+  riff->AppendChild(mxof);
+
+  Chunk *list = new Chunk(Chunk::TYPE_LIST);
+  list->data("Format") = Chunk::TYPE_MxSt;
+  riff->AppendChild(list);
+
+  for (Children::const_iterator it=GetChildren().begin(); it!=GetChildren().end(); it++) {
+    Chunk *mxst = new Chunk(Chunk::TYPE_MxSt);
+    list->AppendChild(mxst);
+
+    Object *obj = static_cast<Object*>(*it);
+    Chunk *mxob = obj->Export();
+    mxst->AppendChild(mxob);
+
+    Chunk *chunklst = new Chunk(Chunk::TYPE_LIST);
+    chunklst->data("Format") = Chunk::TYPE_MxDa;
+    mxst->AppendChild(chunklst);
+
+    // First, interleave all headers (first chunk)
+    for (ssize_t i=-1; i<ssize_t(obj->GetChildCount()); i++) {
+      Object *working_obj = static_cast<Object*>((i == -1) ? obj : obj->GetChildAt(i));
+      if (!working_obj->data().empty()) {
+        const bytearray &data = working_obj->data().front();
+        Chunk *mxch = new Chunk(Chunk::TYPE_MxCh);
+        mxch->data("Flags") = 0;
+        mxch->data("Object") = working_obj->id();
+        mxch->data("Time") = 0;
+        mxch->data("DataSize") = data.size();
+        mxch->data("Data") = data;
+        chunklst->AppendChild(mxch);
+      }
+    }
+
+    // Next, interleave everything by time
+    std::vector<ChunkStatus> chunk_status(obj->GetChildCount() + 1);
+    bool all_done;
+    do {
+      all_done = true;
+      for (ssize_t i=-1; i<ssize_t(obj->GetChildCount()); i++) {
+        Object *working_obj = static_cast<Object*>((i == -1) ? obj : obj->GetChildAt(i));
+        ChunkStatus &status = chunk_status[i+1];
+
+        if (status.index < working_obj->data().size()) {
+          const bytearray &data = working_obj->data().at(status.index);
+
+          all_done = false;
+
+          Chunk *mxch = new Chunk(Chunk::TYPE_MxCh);
+          mxch->data("Flags") = 0;
+          mxch->data("Object") = working_obj->id();
+          mxch->data("Time") = status.time;
+          mxch->data("DataSize") = data.size();
+          mxch->data("Data") = data;
+          chunklst->AppendChild(mxch);
+
+          status.index++;
+
+          // Increment time
+          switch (working_obj->filetype()) {
+          case MxOb::WAV:
+            status.time += 1000;
+            break;
+          case MxOb::STL:
+            // Unaffected by time
+            break;
+          }
+        }
+      }
+    } while (!all_done);
+
+    // Finally interleave end chunks
+    for (ssize_t i=obj->GetChildCount()-1; i>=-1; i--) {
+      Object *working_obj = static_cast<Object*>((i == -1) ? obj : obj->GetChildAt(i));
+      ChunkStatus &status = chunk_status[i+1];
+      Chunk *mxch = new Chunk(Chunk::TYPE_MxCh);
+      mxch->data("Flags") = MxCh::FLAG_END;
+      mxch->data("Object") = working_obj->id();
+      mxch->data("Time") = status.time;
+      mxch->data("DataSize") = 0;
+      chunklst->AppendChild(mxch);
+    }
+  }
+
+  // FIXME: Fill in MxOf table
+  // FIXME: Split MxCh chunks over alignment
+
+  return riff;
+}
+
 bool Interleaf::ParseStream(Chunk *chunk)
 {
   if (chunk->type() != Chunk::TYPE_MxSt) {
@@ -77,13 +202,32 @@ bool Interleaf::ParseStream(Chunk *chunk)
     typedef std::map<uint32_t, Object::ChunkedData> ChunkMap;
     ChunkMap data;
 
+    uint32_t joining_chunk = 0;
+
     for (Children::const_iterator it=list->GetChildren().begin(); it!=list->GetChildren().end(); it++) {
       Chunk *mxch = static_cast<Chunk*>(*it);
       if (mxch->id() == Chunk::TYPE_pad_) {
         // Ignore this chunk
       } else if (mxch->id() == Chunk::TYPE_MxCh) {
+        uint16_t flags = mxch->data("Flags");
+        if (!(flags & MxCh::FLAG_END)) {
           uint32_t obj_id = mxch->data("Object");
-        data[obj_id].push_back(mxch->data("Data"));
+          const Data &chunk_data = mxch->data("Data");
+
+          // For split chunks, join them together
+          if (joining_chunk > 0) {
+            data[obj_id].back().append(chunk_data);
+            if (data[obj_id].back().size() == joining_chunk) {
+              joining_chunk = 0;
+            }
+          } else {
+            if (flags & MxCh::FLAG_SPLIT) {
+              joining_chunk = mxch->data("DataSize");
+            }
+
+            data[obj_id].push_back(chunk_data);
+          }
+        }
       }
     }
 

lib/interleaf.h

@@ -12,6 +12,7 @@ public:
   LIBWEAVER_EXPORT Interleaf();
 
   LIBWEAVER_EXPORT bool Parse(Chunk *riff);
+  LIBWEAVER_EXPORT Chunk *Export() const;
 
 private:
   bool ParseStream(Chunk *chunk);

lib/object.cpp

@@ -1,10 +1,13 @@
 #include "object.h"
 
+#include <iostream>
+
 namespace si {
 
 Object::Object()
 {
-
+  type_ = MxOb::Null;
+  id_ = 0;
 }
 
 bool Object::Parse(Chunk *chunk)
@@ -47,6 +50,46 @@ bool Object::Parse(Chunk *chunk)
   return true;
 }
 
+Chunk *Object::Export() const
+{
+  Chunk *chunk = new Chunk(Chunk::TYPE_MxOb);
+
+  chunk->data("Type") = type_;
+  chunk->data("Presenter") = presenter_;
+  chunk->data("Unknown1") = unknown1_;
+  chunk->data("Name") = name_;
+  chunk->data("ID") = id_;
+  chunk->data("Flags") = flags_;
+  chunk->data("Unknown4") = unknown4_;
+  chunk->data("Duration") = duration_;
+  chunk->data("Loops") = loops_;
+  chunk->data("Position") = position_;
+  chunk->data("Direction") = direction_;
+  chunk->data("Up") = up_;
+  chunk->data("ExtraData") = extra_;
+  chunk->data("FileName") = filename_;
+  chunk->data("Unknown26") = unknown26_;
+  chunk->data("Unknown27") = unknown27_;
+  chunk->data("Unknown28") = unknown28_;
+  chunk->data("FileType") = filetype_;
+  chunk->data("Unknown29") = unknown29_;
+  chunk->data("Unknown30") = unknown30_;
+  chunk->data("Unknown31") = unknown31_;
+
+  if (HasChildren()) {
+    Chunk *list = new Chunk(Chunk::TYPE_LIST);
+    list->data("Format") = Chunk::TYPE_MxCh;
+    chunk->AppendChild(list);
+
+    for (Children::const_iterator it=GetChildren().begin(); it!=GetChildren().end(); it++) {
+      Object *child = static_cast<Object*>(*it);
+      list->AppendChild(child->Export());
+    }
+  }
+
+  return chunk;
+}
+
 bytearray Object::GetNormalizedData() const
 {
   return ToPackedData(filetype(), data_);

lib/object.h

@@ -15,6 +15,8 @@ public:
   Object();
 
   bool Parse(Chunk *chunk);
+  Chunk *Export() const;
+
   void SetChunkedData(const ChunkedData &cd) { data_ = cd; }
 
   LIBWEAVER_EXPORT bytearray GetNormalizedData() const;
@@ -27,6 +29,7 @@ public:
   LIBWEAVER_EXPORT bytearray GetFileBody() const;
   LIBWEAVER_EXPORT size_t GetFileBodySize() const;
 
+  const MxOb::Type &type() const { return type_; }
   const MxOb::FileType &filetype() const { return filetype_; }
   const uint32_t &id() const { return id_; }
   const std::string &name() const { return name_; }