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Slightly fudged but basically reasonable fix for reports of

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playback buffer problems when playing an empty MIDI track
(#4388).


git-svn-id: svn://localhost/ardour2/branches/3.0@10619 d708f5d6-7413-0410-9779-e7cbd77b26cf
This commit is contained in:
Carl Hetherington 2011-11-15 18:04:47 +00:00
parent 4770fea0a2
commit 6822b37c7f
1 changed files with 14 additions and 4 deletions
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18
libs/ardour/midi_diskstream.cc
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@ -1400,15 +1400,25 @@ MidiDiskstream::set_align_style_from_io ()
float
MidiDiskstream::playback_buffer_load () const
{
return (float) ((double) _playback_buf->read_space()/
(double) _playback_buf->capacity());
/* For MIDI it's not trivial to differentiate the following two cases:
1. The playback buffer is empty because the system has run out of time to fill it.
2. The playback buffer is empty because there is no more data on the playlist.
If we use a simple buffer load computation, we will report that the MIDI diskstream
cannot keep up when #2 happens, when in fact it can. Since MIDI data rates
are so low compared to audio, just give a pretend answer here.
*/
return 1;
}
float
MidiDiskstream::capture_buffer_load () const
{
return (float) ((double) _capture_buf->write_space()/
(double) _capture_buf->capacity());
/* We don't report playback buffer load, so don't report capture load either */
return 1;
}
int