allow hotplugging CoreMidi devices.

diff --git a/libs/backends/coreaudio/coreaudio_backend.cc b/libs/backends/coreaudio/coreaudio_backend.cc
index f0313f91e0a76b66d480578e23d932e74efb535e..8946aea0a74b2c50c1a796d106e73bccf138fd01 100644 (file)
--- a/libs/backends/coreaudio/coreaudio_backend.cc
+++ b/libs/backends/coreaudio/coreaudio_backend.cc
@@ -1205,7 +1205,7 @@ CoreAudioBackend::midi_event_get (
                size_t& size, uint8_t** buf, void* port_buffer,
                uint32_t event_index)
 {
-       assert (buf && port_buffer);
+       if (!buf || !port_buffer) return -1;
        CoreMidiBuffer& source = * static_cast<CoreMidiBuffer*>(port_buffer);
        if (event_index >= source.size ()) {
                return -1;
@@ -1224,7 +1224,7 @@ CoreAudioBackend::midi_event_put (
                pframes_t timestamp,
                const uint8_t* buffer, size_t size)
 {
-       assert (buffer && port_buffer);
+       if (!buffer || !port_buffer) return -1;
        CoreMidiBuffer& dst = * static_cast<CoreMidiBuffer*>(port_buffer);
        if (dst.size () && (pframes_t)dst.back ()->timestamp () > timestamp) {
                fprintf (stderr, "CoreMidiBuffer: it's too late for this event. %d > %d\n",
@@ -1238,14 +1238,14 @@ CoreAudioBackend::midi_event_put (
 uint32_t
 CoreAudioBackend::get_midi_event_count (void* port_buffer)
 {
-       assert (port_buffer);
+       if (!port_buffer) return 0;
        return static_cast<CoreMidiBuffer*>(port_buffer)->size ();
 }
 
 void
 CoreAudioBackend::midi_clear (void* port_buffer)
 {
-       assert (port_buffer);
+       if (port_buffer) return;
        CoreMidiBuffer * buf = static_cast<CoreMidiBuffer*>(port_buffer);
        assert (buf);
        buf->clear ();
@@ -1395,8 +1395,7 @@ CoreAudioBackend::n_physical_inputs () const
 void*
 CoreAudioBackend::get_buffer (PortEngine::PortHandle port, pframes_t nframes)
 {
-       assert (port);
-       assert (valid_port (port));
+       if (!port || !valid_port (port)) return NULL;
        return static_cast<CoreBackendPort*>(port)->get_buffer (nframes);
 }