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change API of MIDI::Port::drain() to include a maximum blocking time

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This commit is contained in:
Paul Davis 2016-02-01 13:26:30 -05:00
parent d98021624f
commit 5153631d70
4 changed files with 9 additions and 5 deletions
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2
libs/ardour/ardour/async_midi_port.h
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@ -58,7 +58,7 @@ class LIBARDOUR_API AsyncMIDIPort : public ARDOUR::MidiPort, public MIDI::Port {
int write (const MIDI::byte *msg, size_t msglen, MIDI::timestamp_t timestamp);
int read (MIDI::byte *buf, size_t bufsize);
/* waits for output to be cleared */
void drain (int check_interval_usecs);
void drain (int check_interval_usecs, int total_usecs_to_wait);
/* clears async request communication channel */
void clear () {

8
libs/ardour/async_midi_port.cc
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@ -168,7 +168,7 @@ AsyncMIDIPort::cycle_end (MIDI::pframes_t nframes)
* Cannot be called from a processing thread.
*/
void
AsyncMIDIPort::drain (int check_interval_usecs)
AsyncMIDIPort::drain (int check_interval_usecs, int total_usecs_to_wait)
{
RingBuffer< Evoral::Event<double> >::rw_vector vec = { { 0, 0 }, { 0, 0} };
@ -183,12 +183,16 @@ AsyncMIDIPort::drain (int check_interval_usecs)
return;
}
while (1) {
microseconds_t now = get_microseconds ();
microseconds_t end = now + total_usecs_to_wait;
while (now < end) {
output_fifo.get_write_vector (&vec);
if (vec.len[0] + vec.len[1] >= output_fifo.bufsize() - 1) {
break;
}
Glib::usleep (check_interval_usecs);
now = get_microseconds();
}
}

2
libs/midi++2/midi++/port.h
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@ -75,7 +75,7 @@ class LIBMIDIPP_API Port {
* executes any part of a JACK process callback (will
* simply return immediately in that situation).
*/
virtual void drain (int /* check_interval_usecs */) {}
virtual void drain (int /* check_interval_usecs */, int /* total_usecs_to_wait */) {}
/** Write a message to port.
* @return true on success.

2
libs/surfaces/mackie/surface_port.cc
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@ -99,7 +99,7 @@ SurfacePort::~SurfacePort()
}
if (_async_out) {
_output_port->drain (10000);
_output_port->drain (10000, 250000);
DEBUG_TRACE (DEBUG::MackieControl, string_compose ("unregistering output port %1\n", _async_out->name()));
AudioEngine::instance()->unregister_port (_async_out);
_async_out.reset ((ARDOUR::Port*) 0);