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Fix WinMME midi driver shutdown with sysex enabled

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midiInReset triggers the sysex callback to tell the application that it has
finished with the buffer. Calling midiInAddBuffer results in an infinite loop
so just return during shutdown.
This commit is contained in:
Tim Mayberry 2015-10-06 13:24:53 +10:00
parent 1c0265e27c
commit 4ebc6ef0b4
2 changed files with 13 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

14
libs/backends/portaudio/winmmemidi_input_device.cc
View file

@ -37,6 +37,7 @@ namespace ARDOUR {
WinMMEMidiInputDevice::WinMMEMidiInputDevice (int index)
: m_handle(0)
, m_started(false)
, m_in_reset(false)
, m_midi_buffer(new RingBuffer<uint8_t>(MIDI_BUFFER_SIZE))
, m_sysex_buffer(new uint8_t[SYSEX_BUFFER_SIZE])
{
@ -92,12 +93,14 @@ WinMMEMidiInputDevice::close (std::string& error_msg)
// return error message for first error encountered?
bool success = true;
m_in_reset = true;
MMRESULT result = midiInReset (m_handle);
if (result != MMSYSERR_NOERROR) {
error_msg = get_error_string (result);
DEBUG_MIDI (error_msg);
success = false;
}
m_in_reset = false;
result = midiInUnprepareHeader (m_handle, &m_sysex_header, sizeof(MIDIHDR));
if (result != MMSYSERR_NOERROR) {
error_msg = get_error_string (result);
@ -258,12 +261,19 @@ WinMMEMidiInputDevice::handle_sysex_msg (MIDIHDR* const midi_header,
uint8_t* data = (uint8_t*)header->lpData;
if ((data[0] != 0xf0) || (data[byte_count - 1] != 0xf7)) {
DEBUG_MIDI (string_compose ("Discarding %1 byte sysex chunk\n", byte_count));
DEBUG_MIDI(string_compose("WinMME sysex flags: %1\n", header->dwFlags));
if (m_in_reset) {
DEBUG_MIDI(string_compose("Midi device %1 being reset ignoring sysex msg\n",
name()));
return;
} else if ((data[0] != 0xf0) || (data[byte_count - 1] != 0xf7)) {
DEBUG_MIDI(string_compose("Discarding %1 byte sysex chunk\n", byte_count));
} else {
enqueue_midi_msg (data, byte_count, timestamp);
}
MMRESULT result = midiInAddBuffer (m_handle, &m_sysex_header, sizeof(MIDIHDR));
if (result != MMSYSERR_NOERROR) {
DEBUG_MIDI (get_error_string (result));

1
libs/backends/portaudio/winmmemidi_input_device.h
View file

@ -91,6 +91,7 @@ private: // data
MIDIHDR m_sysex_header;
bool m_started;
bool m_in_reset;
std::string m_name;