static GstStateChangeReturn
gst_decklink_video_src_change_state (GstElement * element,
GstStateChange transition)
{
GstDecklinkVideoSrc *self = GST_DECKLINK_VIDEO_SRC_CAST (element);
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
if (!gst_decklink_video_src_open (self)) {
ret = GST_STATE_CHANGE_FAILURE;
goto out;
}
if (self->mode == GST_DECKLINK_MODE_AUTO &&
self->video_format != GST_DECKLINK_VIDEO_FORMAT_AUTO) {
GST_WARNING_OBJECT (self, "Warning: mode=auto and format!=auto may \
not work");
}
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
g_mutex_lock (&self->input->lock);
self->input->clock_start_time = GST_CLOCK_TIME_NONE;
self->input->clock_epoch += self->input->clock_last_time;
self->input->clock_last_time = 0;
self->input->clock_offset = 0;
g_mutex_unlock (&self->input->lock);
gst_element_post_message (element,
gst_message_new_clock_provide (GST_OBJECT_CAST (element),
self->input->clock, TRUE));
self->flushing = FALSE;
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:{
GstClock *clock;
clock = gst_element_get_clock (GST_ELEMENT_CAST (self));
if (clock) {
if (clock != self->input->clock) {
gst_clock_set_master (self->input->clock, clock);
}
gst_object_unref (clock);
} else {
GST_ELEMENT_ERROR (self, STREAM, FAILED,
(NULL), ("Need a clock to go to PLAYING"));
ret = GST_STATE_CHANGE_FAILURE;
}
break;
}
default:
break;
}
static GstStateChangeReturn
gst_decklink_video_src_change_state (GstElement * element,
GstStateChange transition)
{
GstDecklinkVideoSrc *self = GST_DECKLINK_VIDEO_SRC_CAST (element);
GstStateChangeReturn ret;
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
if (!gst_decklink_video_src_open (self)) {
ret = GST_STATE_CHANGE_FAILURE;
goto out;
}
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
g_mutex_lock (&self->input->lock);
self->input->clock_start_time = GST_CLOCK_TIME_NONE;
self->input->clock_last_time = 0;
self->input->clock_offset = 0;
g_mutex_unlock (&self->input->lock);
gst_element_post_message (element,
gst_message_new_clock_provide (GST_OBJECT_CAST (element),
self->input->clock, TRUE));
self->flushing = FALSE;
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:{
GstClock *clock;
clock = gst_element_get_clock (GST_ELEMENT_CAST (self));
if (clock && clock != self->input->clock) {
gst_clock_set_master (self->input->clock, clock);
}
if (clock)
gst_object_unref (clock);
break;
}
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE)
return ret;
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_element_post_message (element,
gst_message_new_clock_lost (GST_OBJECT_CAST (element),
self->input->clock));
gst_clock_set_master (self->input->clock, NULL);
// Reset calibration to make the clock reusable next time we use it
gst_clock_set_calibration (self->input->clock, 0, 0, 1, 1);
g_mutex_lock (&self->input->lock);
self->input->clock_start_time = GST_CLOCK_TIME_NONE;
self->input->clock_last_time = 0;
self->input->clock_offset = 0;
g_mutex_unlock (&self->input->lock);
g_queue_foreach (&self->current_frames, (GFunc) capture_frame_free, NULL);
g_queue_clear (&self->current_frames);
self->caps_mode = GST_DECKLINK_MODE_AUTO;
break;
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:{
HRESULT res;
GST_DEBUG_OBJECT (self, "Stopping streams");
g_mutex_lock (&self->input->lock);
self->input->started = FALSE;
g_mutex_unlock (&self->input->lock);
res = self->input->input->StopStreams ();
if (res != S_OK) {
GST_ELEMENT_ERROR (self, STREAM, FAILED,
(NULL), ("Failed to stop streams: 0x%08x", res));
ret = GST_STATE_CHANGE_FAILURE;
}
self->internal_base_time = GST_CLOCK_TIME_NONE;
self->external_base_time = GST_CLOCK_TIME_NONE;
break;
}
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:{
g_mutex_lock (&self->input->lock);
if (self->input->start_streams)
self->input->start_streams (self->input->videosrc);
g_mutex_unlock (&self->input->lock);
break;
}
case GST_STATE_CHANGE_READY_TO_NULL:
gst_decklink_video_src_close (self);
break;
default:
break;
}
out:
return ret;
}
