Audio_item &operator = (Audio_item const &);
};
-class Audio_dynamic : public Audio_item
+// Audio_span_dynamic is open at the end of the interval, so the volume
+// grows/diminshes toward a target, but whether it reaches it depends on the
+// next Audio_span_dynamic in the performance. For example, a crescendo
+// notated as mf < p is represented as [mf < x) [p ...) i.e. growth to some
+// volume louder than mf followed by an abrupt change to p.
+class Audio_span_dynamic : public Audio_element
{
public:
- Audio_dynamic ();
+ static const Real MINIMUM_VOLUME;
+ static const Real MAXIMUM_VOLUME;
+ static const Real DEFAULT_VOLUME;
- Real volume_;
- bool silent_;
-};
+private:
+ Moment start_moment_;
+ Real start_volume_;
+ Real duration_; // = target moment - start moment
+ Real gain_; // = target volume - start volume
-class Audio_span_dynamic : public Audio_element
-{
public:
- Direction grow_dir_;
- std::vector<Audio_dynamic *> dynamics_;
- Real min_volume_;
- Real max_volume_;
-
- virtual void render ();
- void add_absolute (Audio_dynamic *);
- Audio_span_dynamic (Real min_volume, Real max_volume);
+ Moment get_start_moment () const { return start_moment_; }
+ Real get_start_volume () const { return start_volume_; }
+ Real get_duration () const { return duration_; }
+ void set_end_moment (Moment);
+ void set_volume (Real start, Real target);
+ Real get_volume (Moment) const;
+ Audio_span_dynamic (Moment mom, Real volume);
};
class Audio_key : public Audio_item
class Audio_instrument : public Audio_item
{
public:
- Audio_instrument (std::string instrument_string);
+ Audio_instrument (string instrument_string);
- std::string str_;
+ string str_;
};
class Audio_note : public Audio_item
// with tieWaitForNote, there might be a skip between the tied notes!
void tie_to (Audio_note *, Moment skip = 0);
Audio_note *tie_head ();
- virtual std::string to_string () const;
+ virtual string to_string () const;
Pitch pitch_;
Moment length_mom_;
Pitch transposing_;
- Audio_dynamic *dynamic_;
+ Audio_span_dynamic *dynamic_;
int extra_velocity_;
Audio_note *tied_;
class Audio_piano_pedal : public Audio_item
{
public:
- std::string type_string_;
+ string type_string_;
Direction dir_;
};
MARKER, CUE_POINT
};
- Audio_text (Audio_text::Type type, const std::string &text_string);
+ Audio_text (Audio_text::Type type, const string &text_string);
Type type_;
- std::string text_string_;
+ string text_string_;
};
class Audio_tempo : public Audio_item
int one_beat_;
};
-class Audio_control_function_value_change : public Audio_item
+class Audio_control_change : public Audio_item
{
public:
- // Supported control functions.
- enum Control
- {
- BALANCE = 0, PAN_POSITION, EXPRESSION, 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_[];
+ Audio_control_change (int control, int value);
- Control control_;
- Real value_;
+ int control_;
+ int value_;
};
int moment_to_ticks (Moment);