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decklinksink: Catch errors during data flow and error out properly

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Otherwise we will just deadlock the thread if e.g. scheduling a video
frame fails for whatever reason.
This commit is contained in:
Sebastian Dröge 2014-08-01 16:58:23 +02:00
parent 24815a5feb
commit fd793e9498
1 changed files with 44 additions and 16 deletions
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54
sys/decklink/gstdecklinksink.cpp
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@ -158,8 +158,6 @@ gst_decklink_sink_init (GstDecklinkSink * decklinksink)
GST_DEBUG_FUNCPTR (gst_decklink_sink_videosink_query));
gst_element_add_pad (GST_ELEMENT (decklinksink), decklinksink->videosinkpad);
decklinksink->audiosinkpad =
gst_pad_new_from_static_template (&gst_decklink_sink_audiosink_template,
"audiosink");
@ -329,13 +327,15 @@ gst_decklink_sink_start (GstDecklinkSink * decklinksink)
const GstDecklinkMode *mode;
BMDAudioSampleType sample_depth;
decklinksink->decklink = gst_decklink_get_nth_device (decklinksink->device_number);
decklinksink->decklink =
gst_decklink_get_nth_device (decklinksink->device_number);
if (!decklinksink->decklink) {
GST_WARNING ("failed to get device %d", decklinksink->device_number);
return FALSE;
}
decklinksink->output = gst_decklink_get_nth_output (decklinksink->device_number);
decklinksink->output =
gst_decklink_get_nth_output (decklinksink->device_number);
if (!decklinksink->decklink) {
GST_WARNING ("no output for device %d", decklinksink->device_number);
return FALSE;
@ -444,8 +444,9 @@ gst_decklink_sink_videosink_chain (GstPad * pad, GstObject * parent,
GstDecklinkSink *decklinksink;
IDeckLinkMutableVideoFrame *frame;
void *data;
GstFlowReturn ret;
GstFlowReturn flow_ret;
const GstDecklinkMode *mode;
HRESULT ret;
decklinksink = GST_DECKLINK_SINK (parent);
@ -464,9 +465,14 @@ gst_decklink_sink_videosink_chain (GstPad * pad, GstObject * parent,
mode = gst_decklink_get_mode (decklinksink->mode);
decklinksink->output->CreateVideoFrame (mode->width,
ret = decklinksink->output->CreateVideoFrame (mode->width,
mode->height, mode->width * 2, decklinksink->pixel_format,
bmdFrameFlagDefault, &frame);
if (ret != S_OK) {
GST_ELEMENT_ERROR (decklinksink, STREAM, FAILED,
(NULL), ("Failed to create video frame: 0x%08x", ret));
return GST_FLOW_ERROR;
}
frame->GetBytes (&data);
gst_buffer_extract (buffer, 0, data, gst_buffer_get_size (buffer));
@ -482,23 +488,37 @@ gst_decklink_sink_videosink_chain (GstPad * pad, GstObject * parent,
g_mutex_unlock (&decklinksink->mutex);
if (!decklinksink->stop) {
decklinksink->output->ScheduleVideoFrame (frame,
ret = decklinksink->output->ScheduleVideoFrame (frame,
decklinksink->num_frames * mode->fps_d, mode->fps_d, mode->fps_n);
if (ret != S_OK) {
GST_ELEMENT_ERROR (decklinksink, STREAM, FAILED,
(NULL), ("Failed to schedule frame: 0x%08x", ret));
flow_ret = GST_FLOW_ERROR;
goto out;
}
decklinksink->num_frames++;
if (!decklinksink->sched_started) {
decklinksink->output->StartScheduledPlayback (0, mode->fps_d, 1.0);
ret = decklinksink->output->StartScheduledPlayback (0, mode->fps_d, 1.0);
if (ret != S_OK) {
GST_ELEMENT_ERROR (decklinksink, STREAM, FAILED,
(NULL), ("Failed to start scheduled playback: 0x%08x", ret));
flow_ret = GST_FLOW_ERROR;
goto out;
}
decklinksink->sched_started = TRUE;
}
ret = GST_FLOW_OK;
flow_ret = GST_FLOW_OK;
} else {
ret = GST_FLOW_FLUSHING;
flow_ret = GST_FLOW_FLUSHING;
}
out:
frame->Release ();
return ret;
return flow_ret;
}
static gboolean
@ -571,7 +591,9 @@ gst_decklink_sink_videosink_query (GstPad * pad, GstObject * parent,
mode_caps = gst_decklink_mode_get_caps (decklinksink->mode);
gst_query_parse_caps (query, &filter);
if (filter) {
caps = gst_caps_intersect_full (filter, mode_caps, GST_CAPS_INTERSECT_FIRST);
caps =
gst_caps_intersect_full (filter, mode_caps,
GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (mode_caps);
} else {
caps = mode_caps;
@ -681,6 +703,7 @@ HRESULT
Output::RenderAudioSamples (bool preroll)
{
uint32_t samplesWritten;
HRESULT ret;
// guint64 samplesToWrite;
@ -698,12 +721,17 @@ Output::RenderAudioSamples (bool preroll)
if (n > 0) {
data = gst_adapter_map (decklinksink->audio_adapter, n);
decklinksink->output->ScheduleAudioSamples ((void *) data, n / 4,
ret = decklinksink->output->ScheduleAudioSamples ((void *) data, n / 4,
0, 0, &samplesWritten);
gst_adapter_unmap (decklinksink->audio_adapter);
gst_adapter_flush (decklinksink->audio_adapter, samplesWritten * 4);
if (ret != S_OK) {
GST_ELEMENT_ERROR (decklinksink, STREAM, FAILED,
(NULL), ("Failed to schedule audio samples: 0x%08x", ret));
} else {
GST_DEBUG ("wrote %d samples, %d available", samplesWritten, n / 4);
}
g_cond_signal (&decklinksink->audio_cond);
} else {