static gboolean
gst_wildmidi_activate (GstPad * sinkpad)
{
if (gst_pad_check_pull_range (sinkpad))
return gst_pad_activate_pull (sinkpad, TRUE);
return gst_pad_activate_push (sinkpad, TRUE);
}
/* this function is called when the pad is activated and should start
* processing data.
*
* We check if we can do random access to decide if we work push or
* pull based.
*/
static gboolean
gst_pngdec_sink_activate (GstPad * sinkpad)
{
if (gst_pad_check_pull_range (sinkpad)) {
return gst_pad_activate_pull (sinkpad, TRUE);
} else {
return gst_pad_activate_push (sinkpad, TRUE);
}
}
static gboolean
gst_raw_parse_sink_activate (GstPad * sinkpad)
{
if (gst_pad_check_pull_range (sinkpad)) {
GST_RAW_PARSE (GST_PAD_PARENT (sinkpad))->mode = GST_ACTIVATE_PULL;
return gst_pad_activate_pull (sinkpad, TRUE);
} else {
GST_RAW_PARSE (GST_PAD_PARENT (sinkpad))->mode = GST_ACTIVATE_PUSH;
return gst_pad_activate_push (sinkpad, TRUE);
}
}
static gboolean
gst_freeze_sink_activate (GstPad * sinkpad)
{
GstFreeze *freeze;
freeze = GST_FREEZE (GST_PAD_PARENT (sinkpad));
if (gst_pad_check_pull_range (sinkpad)) {
return gst_pad_activate_pull (sinkpad, TRUE);
} else {
return gst_pad_activate_push (sinkpad, TRUE);
}
}
static gboolean
gst_ghost_pad_do_activate_push (GstPad * pad, gboolean active)
{
gboolean ret;
GstPad *other;
GST_LOG_OBJECT (pad, "%sactivate push on %s:%s, proxy internal",
(active ? "" : "de"), GST_DEBUG_PAD_NAME (pad));
/* just activate the internal pad */
other = GST_PROXY_PAD_INTERNAL (pad);
ret = gst_pad_activate_push (other, active);
return ret;
}
/* see gstghostpad design docs */
static gboolean
gst_ghost_pad_internal_do_activate_push (GstPad * pad, gboolean active)
{
gboolean ret;
GstPad *other;
GST_LOG_OBJECT (pad, "%sactivate push on %s:%s, we're ok",
(active ? "" : "de"), GST_DEBUG_PAD_NAME (pad));
/* in both cases (SRC and SINK) we activate just the internal pad. The targets
* will be activated later (or already in case of a ghost sinkpad). */
other = GST_PROXY_PAD_INTERNAL (pad);
ret = gst_pad_activate_push (other, active);
return ret;
}
static void
gst_hls_demux_init (GstHLSDemux * demux, GstHLSDemuxClass * klass)
{
/* sink pad */
demux->sinkpad = gst_pad_new_from_static_template (&sinktemplate, "sink");
gst_pad_set_chain_function (demux->sinkpad,
GST_DEBUG_FUNCPTR (gst_hls_demux_chain));
gst_pad_set_event_function (demux->sinkpad,
GST_DEBUG_FUNCPTR (gst_hls_demux_sink_event));
gst_element_add_pad (GST_ELEMENT (demux), demux->sinkpad);
/* demux pad */
demux->srcpad = gst_pad_new_from_static_template (&srctemplate, "src");
gst_pad_set_event_function (demux->srcpad,
GST_DEBUG_FUNCPTR (gst_hls_demux_src_event));
gst_pad_set_query_function (demux->srcpad,
GST_DEBUG_FUNCPTR (gst_hls_demux_src_query));
gst_pad_set_element_private (demux->srcpad, demux);
gst_element_add_pad (GST_ELEMENT (demux), demux->srcpad);
/* fetcher pad */
demux->fetcherpad =
gst_pad_new_from_static_template (&fetchertemplate, "sink");
gst_pad_set_chain_function (demux->fetcherpad,
GST_DEBUG_FUNCPTR (gst_hls_demux_fetcher_chain));
gst_pad_set_event_function (demux->fetcherpad,
GST_DEBUG_FUNCPTR (gst_hls_demux_fetcher_sink_event));
gst_pad_set_element_private (demux->fetcherpad, demux);
gst_pad_activate_push (demux->fetcherpad, TRUE);
/* Properties */
demux->fragments_cache = DEFAULT_FRAGMENTS_CACHE;
demux->bitrate_switch_tol = DEFAULT_BITRATE_SWITCH_TOLERANCE;
demux->download = gst_adapter_new ();
demux->fetcher_bus = gst_bus_new ();
gst_bus_set_sync_handler (demux->fetcher_bus,
gst_hls_demux_fetcher_bus_handler, demux);
demux->thread_cond = g_cond_new ();
demux->thread_lock = g_mutex_new ();
demux->fetcher_cond = g_cond_new ();
demux->fetcher_lock = g_mutex_new ();
demux->queue = g_queue_new ();
g_static_rec_mutex_init (&demux->task_lock);
demux->task = gst_task_create ((GstTaskFunction) gst_hls_demux_loop, demux);
gst_task_set_lock (demux->task, &demux->task_lock);
}
static gboolean
gst_decklink_src_audio_src_activate (GstPad * pad)
{
GstDecklinkSrc *decklinksrc;
gboolean ret;
decklinksrc = GST_DECKLINK_SRC (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (decklinksrc, "activate");
if (gst_pad_check_pull_range (pad)) {
GST_DEBUG_OBJECT (pad, "activating pull");
ret = gst_pad_activate_pull (pad, TRUE);
} else {
GST_DEBUG_OBJECT (pad, "activating push");
ret = gst_pad_activate_push (pad, TRUE);
}
gst_object_unref (decklinksrc);
return ret;
}
static gboolean
gst_decklink_sink_videosink_activate (GstPad * pad)
{
GstDecklinkSink *decklinksink;
gboolean ret;
decklinksink = GST_DECKLINK_SINK (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (decklinksink, "activate");
if (gst_pad_check_pull_range (pad)) {
GST_DEBUG_OBJECT (pad, "activating pull");
ret = gst_pad_activate_pull (pad, TRUE);
} else {
GST_DEBUG_OBJECT (pad, "activating push");
ret = gst_pad_activate_push (pad, TRUE);
}
gst_object_unref (decklinksink);
return ret;
}
static gboolean
gst_aiff_parse_sink_activate (GstPad * sinkpad)
{
GstAiffParse *aiff = GST_AIFF_PARSE (gst_pad_get_parent (sinkpad));
gboolean res;
if (aiff->adapter)
g_object_unref (aiff->adapter);
if (gst_pad_check_pull_range (sinkpad)) {
GST_DEBUG ("going to pull mode");
aiff->streaming = FALSE;
aiff->adapter = NULL;
res = gst_pad_activate_pull (sinkpad, TRUE);
} else {
GST_DEBUG ("going to push (streaming) mode");
aiff->streaming = TRUE;
aiff->adapter = gst_adapter_new ();
res = gst_pad_activate_push (sinkpad, TRUE);
}
gst_object_unref (aiff);
return res;
}
static gboolean
gst_nuv_demux_sink_activate (GstPad * sinkpad)
{
gboolean res = TRUE;
GstNuvDemux *nuv = GST_NUV_DEMUX (gst_pad_get_parent (sinkpad));
if (gst_pad_check_pull_range (sinkpad)) {
nuv->mode = 0;
if (nuv->adapter != NULL) {
gst_object_unref (nuv->adapter);
nuv->adapter = NULL;
}
res = gst_pad_activate_pull (sinkpad, TRUE);
} else {
nuv->mode = 1;
if (!nuv->adapter) {
nuv->adapter = gst_adapter_new ();
}
res = gst_pad_activate_push (sinkpad, TRUE);
}
g_object_unref (nuv);
return res;
}
static gboolean
gst_type_find_element_activate (GstPad * pad)
{
GstTypeFindProbability probability = 0;
GstCaps *found_caps = NULL;
GstTypeFindElement *typefind;
typefind = GST_TYPE_FIND_ELEMENT (GST_OBJECT_PARENT (pad));
/* if we have force caps, use those */
if (typefind->force_caps) {
found_caps = gst_caps_ref (typefind->force_caps);
probability = GST_TYPE_FIND_MAXIMUM;
goto done;
}
/* 1. try to activate in pull mode. if not, switch to push and succeed.
2. try to pull type find.
3. deactivate pull mode.
4. src pad might have been activated push by the state change. deactivate.
5. if we didn't find any caps, try getting the uri extension by doing an uri
query.
6. if we didn't find any caps, fail.
7. emit have-type; maybe the app connected the source pad to something.
8. if the sink pad is activated, we are in pull mode. succeed.
otherwise activate both pads in push mode and succeed.
*/
/* 1 */
if (!gst_pad_check_pull_range (pad) || !gst_pad_activate_pull (pad, TRUE)) {
start_typefinding (typefind);
return gst_pad_activate_push (pad, TRUE);
}
/* 2 */
{
GstPad *peer;
peer = gst_pad_get_peer (pad);
if (peer) {
gint64 size;
GstFormat format = GST_FORMAT_BYTES;
if (!gst_pad_query_duration (peer, &format, &size)) {
GST_WARNING_OBJECT (typefind, "Could not query upstream length!");
gst_object_unref (peer);
return FALSE;
}
/* the size if 0, we cannot continue */
if (size == 0) {
/* keep message in sync with message in sink event handler */
GST_ELEMENT_ERROR (typefind, STREAM, TYPE_NOT_FOUND,
(_("Stream contains no data.")), ("Can't typefind empty stream"));
gst_object_unref (peer);
return FALSE;
}
found_caps = gst_type_find_helper_get_range (GST_OBJECT_CAST (peer),
(GstTypeFindHelperGetRangeFunction) (GST_PAD_GETRANGEFUNC (peer)),
(guint64) size, &probability);
gst_object_unref (peer);
}
}
/* 3 */
gst_pad_activate_pull (pad, FALSE);
/* 4 */
gst_pad_activate_push (typefind->src, FALSE);
/* 5 */
if (!found_caps || probability < typefind->min_probability) {
found_caps = gst_type_find_guess_by_extension (typefind, pad, &probability);
}
/* 6 */
if (!found_caps || probability < typefind->min_probability) {
GST_ELEMENT_ERROR (typefind, STREAM, TYPE_NOT_FOUND, (NULL), (NULL));
gst_caps_replace (&found_caps, NULL);
return FALSE;
}
done:
/* 7 */
g_signal_emit (typefind, gst_type_find_element_signals[HAVE_TYPE],
0, probability, found_caps);
gst_caps_unref (found_caps);
typefind->mode = MODE_NORMAL;
/* 8 */
if (gst_pad_is_active (pad))
return TRUE;
else {
gboolean ret;
ret = gst_pad_activate_push (typefind->src, TRUE);
ret &= gst_pad_activate_push (pad, TRUE);
return ret;
}
}
