Load what we can from broken/truncated MIDI files.

We're still a very long way from tolerant of weird SMF files (libsmf takes a
"crash if input is not exactly perfect" philosophy, if we're going to be polite
and elevate such a thing to "philosophy"), but at least we'll get what's there
from files truncated by old broken versions of Ardour or other situations.

1 files changed, 8 insertions, 1 deletions

diff --git a/libs/evoral/evoral/midi_util.h b/libs/evoral/evoral/midi_util.h
index 5c72fb86c9..f32e816321 100644
--- a/libs/evoral/evoral/midi_util.h
+++ b/libs/evoral/evoral/midi_util.h
@@ -95,7 +95,9 @@ midi_event_size(const uint8_t* buffer)
 		int end;
 		
 		for (end = 1; buffer[end] != MIDI_CMD_COMMON_SYSEX_END; end++) {
-			assert((buffer[end] & 0x80) == 0);
+			if ((buffer[end] & 0x80) != 0) {
+				return -1;
+			}
 		}
 		assert(buffer[end] == MIDI_CMD_COMMON_SYSEX_END);
 		return end + 1;
@@ -118,6 +120,11 @@ midi_event_is_valid(const uint8_t* buffer, size_t len)
 	if (size < 0 || (size_t)size != len) {
 		return false;
 	}
+	for (size_t i = 1; i < len; ++i) {
+		if ((buffer[i] & 0x80) != 0) {
+			return false;  // Non-status byte has MSb set
+		}
+	}
 	return true;
 }