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decklinksink: Don't crash when going to READY another time

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We have to handle the callback object a bit different:
a) it needs a virtual destructor
b) we need to set the callback to NULL when we're done with the output
c) create a new one every time

https://bugzilla.gnome.org/show_bug.cgi?id=740616
This commit is contained in:
Sebastian Dröge 2014-11-28 14:46:06 +01:00
parent 06013a0a6c
commit 2a0123d79a
2 changed files with 14 additions and 7 deletions
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19
sys/decklink/gstdecklinksink.cpp
View file

@ -179,9 +179,6 @@ gst_decklink_sink_init (GstDecklinkSink * decklinksink)
decklinksink->mode = GST_DECKLINK_MODE_NTSC;
decklinksink->device_number = 0;
decklinksink->callback = new Output;
decklinksink->callback->decklinksink = decklinksink;
#ifdef _MSC_VER
g_mutex_init (&decklinksink->com_init_lock);
g_mutex_init (&decklinksink->com_deinit_lock);
@ -297,8 +294,6 @@ gst_decklink_sink_finalize (GObject * object)
g_cond_clear (&decklinksink->audio_cond);
g_mutex_clear (&decklinksink->audio_mutex);
delete decklinksink->callback;
#ifdef _MSC_VER
/* signal the COM thread that it should uninitialize COM */
if (decklinksink->comInitialized) {
@ -341,6 +336,9 @@ gst_decklink_sink_start (GstDecklinkSink * decklinksink)
return FALSE;
}
decklinksink->callback = new Output;
decklinksink->callback->decklinksink = decklinksink;
decklinksink->output->SetAudioCallback (decklinksink->callback);
mode = gst_decklink_get_mode (decklinksink->mode);
@ -353,8 +351,7 @@ gst_decklink_sink_start (GstDecklinkSink * decklinksink)
}
//decklinksink->video_enabled = TRUE;
decklinksink->output->SetScheduledFrameCompletionCallback (decklinksink->
callback);
decklinksink->output->SetScheduledFrameCompletionCallback (decklinksink->callback);
sample_depth = bmdAudioSampleType16bitInteger;
ret = decklinksink->output->EnableAudioOutput (bmdAudioSampleRate48kHz,
@ -392,6 +389,11 @@ gst_decklink_sink_stop (GstDecklinkSink * decklinksink)
decklinksink->output->DisableAudioOutput ();
decklinksink->output->DisableVideoOutput ();
decklinksink->output->SetAudioCallback (NULL);
decklinksink->output->SetScheduledFrameCompletionCallback (NULL);
delete decklinksink->callback;
decklinksink->callback = NULL;
return TRUE;
}
@ -753,3 +755,6 @@ Output::RenderAudioSamples (bool preroll)
return S_OK;
}
Output::~Output() {
}

2
sys/decklink/gstdecklinksink.h
View file

@ -48,6 +48,8 @@ public IDeckLinkAudioOutputCallback
virtual HRESULT STDMETHODCALLTYPE ScheduledFrameCompleted (IDeckLinkVideoFrame* completedFrame, BMDOutputFrameCompletionResult result);
virtual HRESULT STDMETHODCALLTYPE ScheduledPlaybackHasStopped ();
virtual HRESULT STDMETHODCALLTYPE RenderAudioSamples (bool preroll);
virtual ~Output();
};
struct _GstDecklinkSink