Re: [Lilypond-auto] Issue 1412 in lilypond: programming error: Going back in MIDI time

[lilypond]

Updates:
        Status: Started
        Owner: address@hidden
        Labels: Patch-new

Comment #7 on issue 1412 by address@hidden: programming error: Going  
back in MIDI time
http://code.google.com/p/lilypond/issues/detail?id=1412#c7

Fix spurious error playing initial grace notes (issue 1412).

This happens because the MIDI output starts at tick 0, regardless of when  
the first event is. Initial grace notes start start at negative ticks, so  
midi_walker::output_event thinks they're out of order. Fixed by starting at  
the first event.

Note that if a piece starts with a rest, the first event will be the first  
note, so we'll now skip the rest. To preserve initial rests, change the  
last line to:

  last_tick_ = items_.empty () ? 0 : min(items_[0]->audio_column_->ticks  
(), 0);

http://codereview.appspot.com/30360043

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