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decklinkvideosrc: Issue "no signal" warnings

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When a frame is found to not have an associated input source (cable
unplugged, wrong mode selected), an element warning will be issued. When
the next frame in the stream is found to have an input source selected
(e.g. cable replugged), an element info will be issued.

https://bugzilla.gnome.org/show_bug.cgi?id=774629
This commit is contained in:
Vivia Nikolaidou 2016-11-17 18:23:04 +02:00 committed by Sebastian Dröge
parent ca3020cf46
commit 85ef4166a2
2 changed files with 19 additions and 0 deletions
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18
sys/decklink/gstdecklinkvideosrc.cpp
View file

@ -203,6 +203,7 @@ gst_decklink_video_src_init (GstDecklinkVideoSrc * self)
self->buffer_size = DEFAULT_BUFFER_SIZE;
self->video_format = GST_DECKLINK_VIDEO_FORMAT_AUTO;
self->timecode_format = bmdTimecodeRP188Any;
self->no_signal = FALSE;
gst_base_src_set_live (GST_BASE_SRC (self), TRUE);
gst_base_src_set_format (GST_BASE_SRC (self), GST_FORMAT_TIME);
@ -579,6 +580,7 @@ gst_decklink_video_src_create (GstPushSrc * bsrc, GstBuffer ** buffer)
CaptureFrame *f;
GstCaps *caps;
gboolean caps_changed = FALSE;
BMDFrameFlags flags;
g_mutex_lock (&self->lock);
while (g_queue_is_empty (&self->current_frames) && !self->flushing) {
@ -655,6 +657,21 @@ gst_decklink_video_src_create (GstPushSrc * bsrc, GstBuffer ** buffer)
vf->input = self->input->input;
vf->input->AddRef ();
flags = f->frame->GetFlags();
if (flags & bmdFrameHasNoInputSource) {
if (!self->no_signal) {
self->no_signal = TRUE;
GST_ELEMENT_WARNING (GST_ELEMENT (self), RESOURCE, READ, ("No signal"),
("No input source was detected - video frames invalid"));
}
} else {
if (self->no_signal) {
self->no_signal = FALSE;
GST_ELEMENT_INFO (GST_ELEMENT (self), RESOURCE, READ, ("Signal found"),
("Input source detected"));
}
}
GST_BUFFER_TIMESTAMP (*buffer) = f->capture_time;
GST_BUFFER_DURATION (*buffer) = f->capture_duration;
gst_buffer_add_video_time_code_meta (*buffer, f->tc);
@ -926,6 +943,7 @@ gst_decklink_video_src_change_state (GstElement * element,
self->input->clock_epoch += self->input->clock_last_time;
self->input->clock_last_time = 0;
self->input->clock_offset = 0;
self->no_signal = FALSE;
g_mutex_unlock (&self->input->lock);
gst_decklink_video_src_stop (self);

1
sys/decklink/gstdecklinkvideosrc.h
View file

@ -66,6 +66,7 @@ struct _GstDecklinkVideoSrc
GMutex lock;
gboolean flushing;
GQueue current_frames;
gboolean no_signal;
guint buffer_size;