fix 128 instrument song failing to read

src/engine/engine.cpp

@@ -622,7 +622,7 @@ bool DivEngine::load(unsigned char* f, size_t slen) {
     }
 
     if (ds.version>0x03) {
-      ds.insLen=reader.readC();
+      ds.insLen=(unsigned char)reader.readC();
     } else {
       ds.insLen=16;
     }
@@ -905,7 +905,7 @@ bool DivEngine::load(unsigned char* f, size_t slen) {
       }
     }
 
-    ds.sampleLen=reader.readC();
+    ds.sampleLen=(unsigned char)reader.readC();
     logI("reading samples (%d)...\n",ds.sampleLen);
     if (ds.version<0x0b && ds.sampleLen>0) { // TODO what is this for?
       reader.readC();

src/engine/engine.h

@@ -9,6 +9,11 @@
 #include <map>
 #include <queue>
 
+// TODO;
+// - prepare for multi-chip support
+// - implement the .fur format
+// - increase all 17 fields to 128 or more
+
 #define DIV_VERSION "0.2.1"
 #define DIV_ENGINE_VERSION 13
 
@@ -79,6 +84,15 @@ struct DivNoteEvent {
     on(o) {}
 };
 
+struct DivDispatchContainer {
+  DivDispatch* dispatch;
+  blip_buffer_t* bb[2];
+  size_t bbInLen;
+  int temp[2], prevSample[2];
+  short* bbIn[2];
+  short* bbOut[2];
+};
+
 class DivEngine {
   DivDispatch* dispatch;
   TAAudio* output;
@@ -192,6 +206,9 @@ class DivEngine {
     // get sys channel count
     int getChannelCount(DivSystem sys);
 
+    // TODO: get channel count
+    int getTotalChannelCount();
+
     // get channel type
     // - 0: FM
     // - 1: pulse

src/engine/song.h

@@ -74,6 +74,7 @@ struct DivSong {
   unsigned char version;
 
   // system
+  // TODO: multi-chip support
   DivSystem system;
 
   // song information