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mlaudiosink: Fix crash when stopping pipeline

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This is a bug in LuminOS 0.97.0.
This commit is contained in:
Xavier Claessens 2019-09-16 13:15:59 -04:00 committed by Xavier Claessens
parent 380ab8123b
commit da584995f6
1 changed files with 23 additions and 0 deletions
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23
sys/magicleap/mlaudiosink.c
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@ -86,6 +86,12 @@ static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
"channels = (int) [ 1, 2 ], "
"rate = (int) [ 16000, 48000 ], " "layout = (string) interleaved"));
/* HACK: After calling MLAudioStopSound() there is no way to know when it will
* actually stop calling buffer_cb(). If the sink is disposed first, it would
* crash. Keep here a set of active sinks. */
static GHashTable *active_sinks;
static GMutex active_sinks_mutex;
struct _GstMLAudioSink
{
GstAudioSink parent;
@ -198,11 +204,18 @@ buffer_cb (MLHandle handle, gpointer user_data)
{
GstMLAudioSink *self = user_data;
g_mutex_lock (&active_sinks_mutex);
if (!g_hash_table_contains (active_sinks, self))
goto out;
gst_ml_audio_wrapper_set_handle (self->wrapper, handle);
g_mutex_lock (&self->mutex);
g_cond_signal (&self->cond);
g_mutex_unlock (&self->mutex);
out:
g_mutex_unlock (&active_sinks_mutex);
}
/* Must be called with self->mutex locked */
@ -282,6 +295,10 @@ gst_ml_audio_sink_prepare (GstAudioSink * sink, GstAudioRingBufferSpec * spec)
self->stopped = FALSE;
self->paused = FALSE;
g_mutex_lock (&active_sinks_mutex);
g_hash_table_add (active_sinks, self);
g_mutex_unlock (&active_sinks_mutex);
/* createAudioNode() and createSoundWithOutputStream() must both be called in
* application's main thread, and in a single main loop iteration. */
if (!gst_ml_audio_wrapper_invoke_sync (self->wrapper, create_sound_cb, self))
@ -306,8 +323,11 @@ gst_ml_audio_sink_unprepare (GstAudioSink * sink)
{
GstMLAudioSink *self = GST_ML_AUDIO_SINK (sink);
g_mutex_lock (&active_sinks_mutex);
g_hash_table_remove (active_sinks, self);
release_current_buffer (self);
g_clear_pointer (&self->wrapper, gst_ml_audio_wrapper_free);
g_mutex_unlock (&active_sinks_mutex);
return TRUE;
}
@ -432,6 +452,9 @@ gst_ml_audio_sink_class_init (GstMLAudioSinkClass * klass)
GstBaseSinkClass *basesink_class = GST_BASE_SINK_CLASS (klass);
GstAudioSinkClass *audiosink_class = GST_AUDIO_SINK_CLASS (klass);
active_sinks = g_hash_table_new (NULL, NULL);
g_mutex_init (&active_sinks_mutex);
gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_ml_audio_sink_dispose);
gobject_class->set_property =
GST_DEBUG_FUNCPTR (gst_ml_audio_sink_set_property);