Issue 4938 (1/3) Add Audio_item and Midi_item subclasses for control changes

5 files changed, 53 insertions, 0 deletions

diff --git a/lily/audio-item.cc b/lily/audio-item.cc
index 8db787860f..5c713c43ed 100644
--- a/lily/audio-item.cc
+++ b/lily/audio-item.cc
@@ -222,3 +222,9 @@ Audio_control_function_value_change::context_properties_[] = {
   // extra element to signify the end of the mapping, must be kept last
   { 0,                 NUM_CONTROLS,  0.0, 0.0 }
 };
+
+Audio_control_change::Audio_control_change (int control, int value)
+  : control_ (control),
+    value_ (value)
+{
+}
diff --git a/lily/include/audio-item.hh b/lily/include/audio-item.hh
index 614fdff16b..551d43f1c5 100644
--- a/lily/include/audio-item.hh
+++ b/lily/include/audio-item.hh
@@ -176,6 +176,15 @@ public:
   Real value_;
 };
 
+class Audio_control_change : public Audio_item
+{
+public:
+  Audio_control_change (int control, int value);
+
+  int control_;
+  int value_;
+};
+
 int moment_to_ticks (Moment);
 Real moment_to_real (Moment);
 Moment remap_grace_duration (Moment);
diff --git a/lily/include/lily-proto.hh b/lily/include/lily-proto.hh
index ee3946e0fd..f41c8f5a3f 100644
--- a/lily/include/lily-proto.hh
+++ b/lily/include/lily-proto.hh
@@ -24,6 +24,7 @@
 
 class All_font_metrics;
 class Audio_column;
+class Audio_control_change;
 class Audio_control_function_value_change;
 class Audio_dynamic;
 class Audio_element;
@@ -90,6 +91,7 @@ class Lyric_engraver;
 class Lyric_performer;
 class Mensural_ligature_engraver;
 class Midi_chunk;
+class Midi_control_change;
 class Midi_control_function_value_change;
 class Midi_duration;
 class Midi_dynamic;
diff --git a/lily/include/midi-item.hh b/lily/include/midi-item.hh
index dff3f4df9b..b979bca4ba 100644
--- a/lily/include/midi-item.hh
+++ b/lily/include/midi-item.hh
@@ -76,6 +76,20 @@ public:
 };
 
 /**
+   MIDI control change
+*/
+class Midi_control_change : public Midi_channel_item
+{
+public:
+  DECLARE_CLASSNAME (Midi_control_change);
+  Midi_control_change (Audio_control_change *ai);
+  virtual ~Midi_control_change ();
+  virtual string to_string () const;
+
+  Audio_control_change *audio_;
+};
+
+/**
    Change instrument event
 */
 class Midi_instrument : public Midi_channel_item
diff --git a/lily/midi-item.cc b/lily/midi-item.cc
index 7f064e24a8..47ccd787c3 100644
--- a/lily/midi-item.cc
+++ b/lily/midi-item.cc
@@ -54,6 +54,8 @@ Midi_item::get_midi (Audio_item *a)
   else if (Audio_control_function_value_change *i
            = dynamic_cast<Audio_control_function_value_change *> (a))
     return new Midi_control_function_value_change (i);
+  else if (Audio_control_change *i = dynamic_cast<Audio_control_change *> (a))
+    return new Midi_control_change (i);
   else
     assert (0);
 
@@ -111,6 +113,12 @@ Midi_control_function_value_change
 {
 }
 
+Midi_control_change::Midi_control_change (Audio_control_change *ai)
+  : Midi_channel_item (ai),
+    audio_ (ai)
+{
+}
+
 Midi_item::~Midi_item ()
 {
 }
@@ -123,6 +131,10 @@ Midi_control_function_value_change::~Midi_control_function_value_change ()
 {
 }
 
+Midi_control_change::~Midi_control_change ()
+{
+}
+
 string
 int2midi_varint_string (int i)
 {
@@ -388,6 +400,16 @@ Midi_control_function_value_change::to_string () const
   return str;
 }
 
+string
+Midi_control_change::to_string () const
+{
+  Byte status_byte = (char) (0xB0 + channel_);
+  string str = ::to_string ((char)status_byte);
+  str += ::to_string ((char) (audio_->control_));
+  str += ::to_string ((char) (audio_->value_));
+  return str;
+}
+
 char const *
 Midi_item::name () const
 {