[Lilypond-auto] [LilyIssues-auto] [testlilyissues:issues] #4745 Add Staff.midiCC context property, refactor handling of MIDI control changes

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• Patch: review --> countdown
• Comment:

Patch on countdown for Feb 2nd.

@Heikki if you (or any other dev) still feels this is not 'ready' for pushing, please change the patch status (or make comments on Rietveld), it is unclear to me what I should really do here, so I am moving this on and hoping those that know better will either comment or let it through. Thanks.

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[issues:#4745] Add Staff.midiCC context property, refactor handling of MIDI control changes

Status: Started
Created: Sat Jan 16, 2016 06:01 PM UTC by H T LilyPond
Last Updated: Wed Jan 27, 2016 06:35 PM UTC
Owner: H T LilyPond

Add Staff.midiCC context property, refactor handling of MIDI control changes

Setting the Staff.midiCC context property to a list of (control number,
control value) pairs, where every control number and control value must
be an integer between the inclusive range from 0 to 127, will send the
corresponding raw control changes to the MIDI output on the MIDI channel
associated with the current context. For example,
\set Staff.midiCC = #'((7 . 100)) will set the MIDI volume control (#7)
to 100.

Most of the logic for handling MIDI control value initialization from
context properties (in Staff_performer::new_audio_staff),
changes (in
Midi_control_function_performer::announce_function_value_change), and
value conversion for output (in
Midi_control_function_value_change::to_string), was moved into the new
Midi_control_change_announcer class. All MIDI control changes are now
encoded using {Audio,Midi}_control_change items. This change makes the
old {Audio,Midi}_control_function_value_change classes obsolete.

http://codereview.appspot.com/284280043

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