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openal: Add cleanup guards to buffer functions

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Without this, the audio might encounter an error, call cleanup()
on itself, and (if in the middle of update()) try to dereference
its recently cleaned-up _sd pointer.

Fixes #230
This commit is contained in:
Sam Edwards 2018-03-01 20:37:39 -07:00
parent 6ca0a68042
commit fd5ce687b3
1 changed files with 3 additions and 0 deletions
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3
panda/src/audiotraits/openalAudioSound.cxx
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@ -434,6 +434,7 @@ correct_calibrated_clock(double rtc, double t) {
void OpenALAudioSound::
pull_used_buffers() {
ReMutexHolder holder(OpenALAudioManager::_lock);
if (_manager == 0) return;
while (_stream_queued.size()) {
ALuint buffer = 0;
ALint num_buffers = 0;
@ -489,6 +490,8 @@ push_fresh_buffers() {
ReMutexHolder holder(OpenALAudioManager::_lock);
static unsigned char data[65536];
if (_manager == 0) return;
if (_sd->_sample) {
while ((_loops_completed < _playing_loops) &&
(_stream_queued.size() < 100)) {