void VideoImpl::_updateRate()
{
// Check different things.
if (_pipeline == NULL)
{
qWarning() << "Cannot set rate: no pipeline!" << endl;
return;
}
if (!_seekEnabled)
{
qWarning() << "Cannot set rate: seek not working" << endl;
return;
}
if (!_isMovieReady())
{
qWarning() << "Movie is not yet ready to play, cannot seek yet." << endl;
}
// Obtain the current position, needed for the seek event.
gint64 position;
if (!gst_element_query_position (_pipeline, GST_FORMAT_TIME, &position)) {
qWarning() << "Unable to retrieve current position." << endl;
return;
}
// Create the seek event.
GstEvent *seekEvent;
if (_rate > 0.0) {
// Rate is positive (playing the video in normal direction)
// Set new rate as a first argument. Provide position 0 so that we go to 0:00
seekEvent = gst_event_new_seek (_rate, GST_FORMAT_TIME, GstSeekFlags( GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_ACCURATE ),
GST_SEEK_TYPE_SET, position, GST_SEEK_TYPE_NONE, 0); // Go to 0:00
} else {
// Rate is negative
// Set new rate as a first arguemnt. Provide the position we were already at.
seekEvent = gst_event_new_seek (_rate, GST_FORMAT_TIME, GstSeekFlags( GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_ACCURATE ),
GST_SEEK_TYPE_SET, 0, GST_SEEK_TYPE_SET, position);
}
// If we have not done so, obtain the sink through which we will send the seek events.
if (_appsink0 == NULL) {
g_object_get (_pipeline, "video-sink", &_appsink0, NULL);
}
// Send the event.
if (!gst_element_send_event (_appsink0, seekEvent)) {
qWarning() << "Cannot perform seek event" << endl;
}
qDebug() << "Current rate: " << _rate << "." << endl;
}
void MediaImpl::_updateRate()
{
if (_pipeline == NULL)
{
qDebug() << "Cannot set rate: no pipeline!" << endl;
return;
}
if (!_seekEnabled)
{
qDebug() << "Cannot set rate: seek not working" << endl;
return;
}
if (!_isMovieReady())
{
qDebug() << "Movie is not yet ready to play, cannot seek yet." << endl;
}
gint64 position;
GstEvent *seekEvent;
/* Obtain the current position, needed for the seek event */
if (!gst_element_query_position (_pipeline, GST_FORMAT_TIME, &position)) {
g_printerr ("Unable to retrieve current position.\n");
return;
}
/* Create the seek event */
if (_rate > 0) {
seekEvent = gst_event_new_seek (_rate, GST_FORMAT_TIME, GstSeekFlags( GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_ACCURATE ),
GST_SEEK_TYPE_SET, position, GST_SEEK_TYPE_NONE, 0);
} else {
seekEvent = gst_event_new_seek (_rate, GST_FORMAT_TIME, GstSeekFlags( GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_ACCURATE ),
GST_SEEK_TYPE_SET, 0, GST_SEEK_TYPE_SET, position);
}
if (_appsink0 == NULL) {
/* If we have not done so, obtain the sink through which we will send the seek events */
g_object_get (_pipeline, "video-sink", &_appsink0, NULL);
}
/* Send the event */
gst_element_send_event (_appsink0, seekEvent);
g_print ("Current rate: %g\n", _rate);
}
void MediaImpl::_checkMessages()
{
if (_bus != NULL)
{
// Get message.
GstMessage *msg = gst_bus_timed_pop_filtered(
_bus, 0,
(GstMessageType) (GST_MESSAGE_STATE_CHANGED | GST_MESSAGE_ERROR | GST_MESSAGE_EOS | GST_MESSAGE_ASYNC_DONE));
if (msg != NULL)
{
GError *err;
gchar *debug_info;
switch (GST_MESSAGE_TYPE (msg))
{
// Error ////////////////////////////////////////////////
case GST_MESSAGE_ERROR:
gst_message_parse_error(msg, &err, &debug_info);
g_printerr("Error received from element %s: %s\n",
GST_OBJECT_NAME (msg->src), err->message);
g_printerr("Debugging information: %s\n",
debug_info ? debug_info : "none");
g_clear_error(&err);
g_free(debug_info);
if (!_isSharedMemorySource)
{
_terminate = true;
}
else
{
_attached = false;
gst_element_set_state (_pipeline, GST_STATE_PAUSED);
gst_element_set_state (_pipeline, GST_STATE_NULL);
gst_element_set_state (_pipeline, GST_STATE_READY);
}
// _finish();
break;
// End-of-stream ////////////////////////////////////////
case GST_MESSAGE_EOS:
// Automatically loop back.
g_print("End-Of-Stream reached.\n");
resetMovie();
// _terminate = true;
// _finish();
break;
// Pipeline has prerolled/ready to play ///////////////
case GST_MESSAGE_ASYNC_DONE:
if (!_isMovieReady())
{
// Check if seeking is allowed.
gint64 start, end;
GstQuery *query = gst_query_new_seeking (GST_FORMAT_TIME);
if (gst_element_query (_pipeline, query))
{
gst_query_parse_seeking (query, NULL, (gboolean*)&_seekEnabled, &start, &end);
if (_seekEnabled)
{
g_print ("Seeking is ENABLED from %" GST_TIME_FORMAT " to %" GST_TIME_FORMAT "\n",
GST_TIME_ARGS (start), GST_TIME_ARGS (end));
}
else
{
g_print ("Seeking is DISABLED for this stream.\n");
}
}
else
{
g_printerr ("Seeking query failed.");
}
gst_query_unref (query);
// Movie is ready!
_setMovieReady(true);
}
break;
case GST_MESSAGE_STATE_CHANGED:
// We are only interested in state-changed messages from the pipeline.
if (GST_MESSAGE_SRC (msg) == GST_OBJECT (_pipeline))
{
GstState oldState, newState, pendingState;
gst_message_parse_state_changed(msg, &oldState, &newState,
&pendingState);
g_print("Pipeline state for movie %s changed from %s to %s:\n",
_uri.toUtf8().constData(),
gst_element_state_get_name(oldState),
gst_element_state_get_name(newState));
}
break;
default:
// We should not reach here.
g_printerr("Unexpected message received.\n");
break;
}
gst_message_unref(msg);
}
}
}
void VideoImpl::_checkMessages()
{
if (_bus != NULL)
{
// Get message.
GstMessage *msg = gst_bus_timed_pop_filtered(
_bus, 0,
(GstMessageType) (GST_MESSAGE_STATE_CHANGED | GST_MESSAGE_ERROR | GST_MESSAGE_EOS | GST_MESSAGE_ASYNC_DONE));
if (msg != NULL)
{
GError *err;
gchar *debug_info;
switch (GST_MESSAGE_TYPE (msg))
{
// Error ////////////////////////////////////////////////
case GST_MESSAGE_ERROR:
gst_message_parse_error(msg, &err, &debug_info);
qWarning() << "Error received from element " << GST_OBJECT_NAME (msg->src) << ": " << err->message << endl;
qDebug() << "Debugging information: " << (debug_info ? debug_info : "none") << "." << endl;
g_clear_error(&err);
g_free(debug_info);
if (!isLive())
{
_terminate = true;
}
else
{
gst_element_set_state (_pipeline, GST_STATE_PAUSED);
gst_element_set_state (_pipeline, GST_STATE_NULL);
gst_element_set_state (_pipeline, GST_STATE_READY);
}
// _finish();
break;
// End-of-stream ////////////////////////////////////////
case GST_MESSAGE_EOS:
// Automatically loop back.
resetMovie();
// _terminate = true;
// _finish();
break;
// Pipeline has prerolled/ready to play ///////////////
case GST_MESSAGE_ASYNC_DONE:
if (!_isMovieReady())
{
// Check if seeking is allowed.
gint64 start, end;
GstQuery *query = gst_query_new_seeking (GST_FORMAT_TIME);
if (gst_element_query (_pipeline, query))
{
gst_query_parse_seeking (query, NULL, (gboolean*)&_seekEnabled, &start, &end);
if (_seekEnabled)
{
#ifdef VIDEO_IMPL_VERBOSE
qDebug() << "Seeking is ENABLED from " << start << " to " << end << "." << endl;
#endif
}
else
{
qDebug() << "Seeking is DISABLED for this stream." << endl;
}
}
else
{
qWarning() << "Seeking query failed." << endl;
}
gst_query_unref (query);
// Movie is ready!
#ifdef VIDEO_IMPL_VERBOSE
qDebug() << "Preroll done: movie is ready." << endl;
#endif // ifdef
_setMovieReady(true);
}
break;
case GST_MESSAGE_STATE_CHANGED:
// We are only interested in state-changed messages from the pipeline.
if (GST_MESSAGE_SRC (msg) == GST_OBJECT (_pipeline))
{
GstState oldState, newState, pendingState;
gst_message_parse_state_changed(msg, &oldState, &newState, &pendingState);
#ifdef VIDEO_IMPL_VERBOSE
qDebug() << "Pipeline state for movie " << _uri
<< " changed from " << gst_element_state_get_name(oldState)
<< " to " << gst_element_state_get_name(newState) << endl;
#endif
}
break;
default:
// We should not reach here.
qWarning() << "Unexpected message received." << endl;
break;
}
gst_message_unref(msg);
}
}
}
