type_ = type;
}
+Audio_control_function_value_change
+::Audio_control_function_value_change (Control control, Real value)
+ : control_ (control), value_ (value)
+{
+}
+
+const Audio_control_function_value_change::Context_property
+Audio_control_function_value_change::context_properties_[] = {
+ // property name, enum constant, lower bound for range, upper bound for range
+ { "midiBalance", BALANCE, -1.0, 1.0 },
+ { "midiPanPosition", PAN_POSITION, -1.0, 1.0 },
+ { "midiReverbLevel", REVERB_LEVEL, 0.0, 1.0 },
+ { "midiChorusLevel", CHORUS_LEVEL, 0.0, 1.0 },
+ // extra element to signify the end of the mapping, must be kept last
+ { 0, NUM_CONTROLS, 0.0, 0.0 }
+};
int one_beat_;
};
+class Audio_control_function_value_change : public Audio_item
+{
+public:
+ // Supported control functions.
+ enum Control
+ {
+ BALANCE = 0, PAN_POSITION, REVERB_LEVEL, CHORUS_LEVEL,
+ // pseudo value for representing the size of the enum; must be kept last
+ NUM_CONTROLS
+ };
+
+ Audio_control_function_value_change (Control control, Real value);
+
+ // Information about a context property corresponding to a control function
+ // (name, the corresponding enumeration value, and the allowed range for the
+ // value of the context property).
+ struct Context_property
+ {
+ const char *name_;
+ Control control_;
+ Real range_min_;
+ Real range_max_;
+ };
+
+ // Mapping from supported control functions to the corresponding context
+ // properties.
+ static const Context_property context_properties_[];
+
+ Control control_;
+ Real value_;
+};
+
int moment_to_ticks (Moment);
Real moment_to_real (Moment);
Moment remap_grace_duration (Moment);
class Midi_channel_item : public Midi_item
{
public:
+ virtual ~Midi_channel_item ();
int channel_;
DECLARE_CLASSNAME (Midi_channel_item);
Midi_channel_item (Audio_item *ai);
};
+/**
+ Midi control function value changes.
+*/
+class Midi_control_function_value_change : public Midi_channel_item
+{
+public:
+ DECLARE_CLASSNAME (Midi_control_function_value_change);
+ Midi_control_function_value_change (Audio_control_function_value_change *ai);
+ virtual ~Midi_control_function_value_change ();
+ virtual string to_string () const;
+ Audio_control_function_value_change::Control control_;
+ Real value_;
+};
+
class Midi_duration : public Midi_item
{
public:
return new Midi_time_signature (i);
else if (Audio_text *i = dynamic_cast<Audio_text *> (a))
return new Midi_text (i);
+ 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
assert (0);
{
}
+Midi_control_function_value_change
+::Midi_control_function_value_change (Audio_control_function_value_change *ai)
+ : Midi_channel_item (ai), control_ (ai->control_), value_ (ai->value_)
+{
+}
+
Midi_item::~Midi_item ()
{
}
+Midi_channel_item::~Midi_channel_item ()
+{
+}
+
+Midi_control_function_value_change::~Midi_control_function_value_change ()
+{
+}
+
string
int2midi_varint_string (int i)
{
return str;
}
+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);
+ int value = lround (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)
+ {
+ str += ::to_string ((char)0x00);
+ str += ::to_string ((char)status_byte);
+ str += ::to_string ((char)(control_function->lsb_control_number_));
+ str += ::to_string ((char)(value & 0x7F));
+ }
+ return str;
+}
+
char const *
Midi_item::name () const
{
projects / lilypond.git / commitdiff