diff --git a/plugins/elements/gstinputselector.c b/plugins/elements/gstinputselector.c index 393a51e034..6cac2453e6 100644 --- a/plugins/elements/gstinputselector.c +++ b/plugins/elements/gstinputselector.c @@ -1203,6 +1203,8 @@ static GstStateChangeReturn gst_input_selector_change_state (GstElement * static gboolean gst_input_selector_event (GstPad * pad, GstObject * parent, GstEvent * event); +static gboolean gst_input_selector_query (GstPad * pad, GstObject * parent, + GstQuery * query); #define _do_init \ GST_DEBUG_CATEGORY_INIT (input_selector_debug, \ @@ -1311,6 +1313,8 @@ gst_input_selector_init (GstInputSelector * sel) GST_DEBUG_FUNCPTR (gst_selector_pad_iterate_linked_pads)); gst_pad_set_event_function (sel->srcpad, GST_DEBUG_FUNCPTR (gst_input_selector_event)); + gst_pad_set_query_function (sel->srcpad, + GST_DEBUG_FUNCPTR (gst_input_selector_query)); GST_OBJECT_FLAG_SET (sel->srcpad, GST_PAD_FLAG_PROXY_CAPS); gst_element_add_pad (GST_ELEMENT (sel), sel->srcpad); /* sinkpad management */ @@ -1580,6 +1584,143 @@ gst_input_selector_event (GstPad * pad, GstObject * parent, GstEvent * event) return result; } +typedef struct +{ + guint count; + gboolean live; + GstClockTime min, max; +} LatencyFoldData; + +static gboolean +query_latency_default_fold (const GValue * item, GValue * ret, + gpointer user_data) +{ + GstPad *pad = g_value_get_object (item), *peer; + LatencyFoldData *fold_data = user_data; + GstQuery *query; + gboolean res = FALSE; + + query = gst_query_new_latency (); + + peer = gst_pad_get_peer (pad); + if (peer) { + res = gst_pad_peer_query (pad, query); + } else { + GST_LOG_OBJECT (pad, "No peer pad found, ignoring this pad"); + } + + if (res) { + gboolean live; + GstClockTime min, max; + + gst_query_parse_latency (query, &live, &min, &max); + + GST_LOG_OBJECT (pad, "got latency live:%s min:%" G_GINT64_FORMAT + " max:%" G_GINT64_FORMAT, live ? "true" : "false", min, max); + + /* FIXME : Why do we only take values into account if it's live ? */ + if (live || fold_data->count == 0) { + if (min > fold_data->min) + fold_data->min = min; + + if (fold_data->max == GST_CLOCK_TIME_NONE) + fold_data->max = max; + else if (max < fold_data->max) + fold_data->max = max; + + fold_data->live = live; + } + fold_data->count += 1; + } else if (peer) { + GST_DEBUG_OBJECT (pad, "latency query failed"); + g_value_set_boolean (ret, FALSE); + } + + gst_query_unref (query); + if (peer) + gst_object_unref (peer); + + return TRUE; +} + +static gboolean +gst_input_selector_query_latency (GstInputSelector * sel, GstPad * pad, + GstQuery * query) +{ + GstIterator *it; + GstIteratorResult res; + GValue ret = G_VALUE_INIT; + gboolean query_ret; + LatencyFoldData fold_data; + + /* This is basically gst_pad_query_latency_default() but with a different + * iterator. We query all sinkpads! */ + it = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (sel)); + if (!it) { + GST_DEBUG_OBJECT (pad, "Can't iterate internal links"); + return FALSE; + } + + g_value_init (&ret, G_TYPE_BOOLEAN); + +retry: + fold_data.count = 0; + fold_data.live = FALSE; + fold_data.min = 0; + fold_data.max = GST_CLOCK_TIME_NONE; + + g_value_set_boolean (&ret, TRUE); + res = gst_iterator_fold (it, query_latency_default_fold, &ret, &fold_data); + switch (res) { + case GST_ITERATOR_OK: + g_assert_not_reached (); + break; + case GST_ITERATOR_DONE: + break; + case GST_ITERATOR_ERROR: + g_value_set_boolean (&ret, FALSE); + break; + case GST_ITERATOR_RESYNC: + gst_iterator_resync (it); + goto retry; + default: + g_assert_not_reached (); + break; + } + gst_iterator_free (it); + + query_ret = g_value_get_boolean (&ret); + if (query_ret) { + GST_LOG_OBJECT (pad, "got latency live:%s min:%" G_GINT64_FORMAT + " max:%" G_GINT64_FORMAT, fold_data.live ? "true" : "false", + fold_data.min, fold_data.max); + + if (fold_data.min > fold_data.max) { + GST_ERROR_OBJECT (pad, "minimum latency bigger than maximum latency"); + } + + gst_query_set_latency (query, fold_data.live, fold_data.min, fold_data.max); + } else { + GST_LOG_OBJECT (pad, "latency query failed"); + } + + return query_ret; +} + +static gboolean +gst_input_selector_query (GstPad * pad, GstObject * parent, GstQuery * query) +{ + GstInputSelector *sel = GST_INPUT_SELECTOR (parent); + + switch (GST_QUERY_TYPE (query)) { + case GST_QUERY_LATENCY: + /* Query all sink pads for the latency, not just the active one */ + return gst_input_selector_query_latency (sel, pad, query); + default: + return gst_pad_query_default (pad, parent, query); + } +} + /* check if the pad is the active sinkpad */ static inline gboolean gst_input_selector_is_active_sinkpad (GstInputSelector * sel, GstPad * pad)