-Midi_track::Midi_track ()
- : Midi_chunk ()
-{
- // 4D 54 72 6B MTrk
- // 00 00 00 3B chunk length (59)
- // 00 FF 58 04 04 02 18 08 time signature
- // 00 FF 51 03 07 A1 20 tempo
-
- // FF 59 02 sf mi Key Signature
- // sf = -7: 7 flats
- // sf = -1: 1 flat
- // sf = 0: key of C
- // sf = 1: 1 sharp
- // sf = 7: 7 sharps
- // mi = 0: major key
- // mi = 1: minor key
-
- number_ = 0;
-
- char const *data_str0 = ""
- // "00" "ff58" "0404" "0218" "08"
- // "00" "ff51" "0307" "a120"
- // why a key at all, in midi?
- // key: C
- // "00" "ff59" "02" "00" "00"
- // key: F (scsii-menuetto)
- // "00" "ff59" "02" "ff" "00"
- ;
-
- std::string data_string;
- // only for format 0 (currently using format 1)?
- data_string += String_convert::hex2bin (data_str0);
-
- char const *footer_str0 = "00" "ff2f" "00";
- std::string footer_string = String_convert::hex2bin (footer_str0);
-
- set ("MTrk", data_string, footer_string);
-}
-
-void
-Midi_track::add (Moment delta_time_mom, Midi_item *midi)
-{
- assert (delta_time_mom >= Moment (0));
-
- Midi_event *e = new Midi_event (delta_time_mom, midi);
- event_p_list_.append (new Killing_cons<Midi_event> (e, 0));
-}
-
-std::string
-Midi_track::data_string () const
-{
- std::string str = Midi_chunk::data_string ();
- if (do_midi_debugging_global)
- str += "\n";
- for (Cons<Midi_event> *i = event_p_list_.head_; i; i = i->next_)
+string
+Midi_control_function_value_change::to_string () const
+{
+ // MIDI control function information. A MIDI control function may have one
+ // or two assigned control numbers depending on whether it supports coarse
+ // (7-bit) or fine (14-bit) resolution. If the control function supports
+ // fine resolution, the first (respectively, second) member of the structure
+ // represents the control number for setting the most (least) significant 7
+ // bits of the control function's value.
+ struct Control_function
+ {
+ int msb_control_number_;
+ int lsb_control_number_;
+ };
+
+ // Mapping from supported control functions (enumeration values defined in
+ // Audio_controller_value_change::Control) to the corresponding MIDI control
+ // numbers.
+ static const Control_function control_functions[] =
+ {
+ // When adding support for new control functions, please note the
+ // following:
+ // - The order of the control number definitions should be kept
+ // consistent with the order of the enumeration values defined in
+ // Audio_control_function_value_change::Control.
+ // - If the control function has only coarse resolution, the function's
+ // control number should be stored in the MSB member of the array
+ // element, and the LSB member should be set to a negative value.
+
+ { 8, 40 }, // balance
+ { 10, 42 }, // pan position
+ { 91, -1 }, // reverb level (only coarse resolution available)
+ { 93, -1 } // chorus level (only coarse resolution available)
+ };
+
+ string str;
+ const Control_function *control_function = &control_functions[control_];
+ static const Real full_fine_scale = 0x3FFF;
+ static const Real full_coarse_scale = 0x7F;
+ bool fine_resolution = (control_function->lsb_control_number_ >= 0);
+ // value_ is in range [0.0 .. 1.0]. For directional value ranges,
+ // #CENTER will correspond to 0.5 exactly, and my_round rounds
+ // upwards when in case of doubt. That means that center position
+ // will round to 0x40 or 0x2000 by a hair's breadth.
+ int value = (int) my_round (value_ * (fine_resolution ?
+ full_fine_scale : full_coarse_scale));
+ Byte status_byte = (char) (0xB0 + channel_);
+ str += ::to_string ((char)status_byte);
+ str += ::to_string ((char)(control_function->msb_control_number_));
+ str += ::to_string ((char)(fine_resolution ? (value >> 7) : value));
+ if (fine_resolution)