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Work around OSX MIDI devices that send no timestamps

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This commit is contained in:
Robin Gareus 2016-10-19 19:10:18 +02:00
parent 3fa9dd51b2
commit 56711b99c9
1 changed files with 9 additions and 1 deletions
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10
libs/backends/coreaudio/coremidi_io.cc
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@ -268,13 +268,21 @@ CoreMidiIo::recv_event (uint32_t port, double cycle_time_us, uint64_t &time, uin
if ((*it)->timeStamp < end) {
if ((*it)->timeStamp < start) {
uint64_t dt = AudioConvertHostTimeToNanos(start - (*it)->timeStamp);
if (dt > 1e7) { // 10ms,
if (dt > 1e7 && (*it)->timeStamp != 0) { // 10ms slack and a timestamp is given
#ifndef NDEBUG
printf("Dropped Stale Midi Event. dt:%.2fms\n", dt * 1e-6);
#endif
it = _input_queue[port].erase(it);
continue;
} else {
/* events without a valid timestamp, or events that arrived
* less than 10ms in the past are allowed and
* queued at the beginning of the cycle:
* time (relative to cycle start) = 0
*
* The latter use needed for the "Avid Artist" Control Surface
* the OSX driver sends no timestamps.
*/
#if 0
printf("Stale Midi Event. dt:%.2fms\n", dt * 1e-6);
#endif