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playbin: Implement context caching for sinks that are not in playsink yet

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This commit is contained in:
Sebastian Dröge 2013-09-18 22:05:36 +02:00
parent e21d3d214a
commit 78b0e16773
1 changed files with 83 additions and 0 deletions
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83
gst/playback/gstplaybin2.c
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@ -470,6 +470,8 @@ struct _GstPlayBin
} duration[5]; /* cached durations */
guint64 ring_buffer_max_size; /* 0 means disabled */
GList *contexts;
};
struct _GstPlayBinClass
@ -1530,6 +1532,8 @@ gst_play_bin_finalize (GObject * object)
if (playbin->velements)
g_sequence_free (playbin->velements);
g_list_free_full (playbin->contexts, (GDestroyNotify) gst_context_unref);
g_rec_mutex_clear (&playbin->lock);
g_mutex_clear (&playbin->dyn_lock);
g_mutex_clear (&playbin->elements_lock);
@ -4061,6 +4065,34 @@ gst_play_bin_set_context (GstElement * element, GstContext * context)
}
/* Pass sink messages to the application, e.g. NEED_CONTEXT messages */
static void
gst_play_bin_update_context (GstPlayBin * playbin, GstContext * context)
{
GList *l;
const gchar *context_type;
GST_OBJECT_LOCK (playbin);
context_type = gst_context_get_context_type (context);
for (l = playbin->contexts; l; l = l->next) {
GstContext *tmp = l->data;
const gchar *tmp_type = gst_context_get_context_type (tmp);
/* Always store newest context but never replace
* a persistent one by a non-persistent one */
if (strcmp (context_type, tmp_type) == 0 &&
(gst_context_is_persistent (context) ||
!gst_context_is_persistent (tmp))) {
gst_context_replace ((GstContext **) & l->data, context);
break;
}
}
/* Not found? Add */
if (l != NULL)
playbin->contexts =
g_list_prepend (playbin->contexts, gst_context_ref (context));
GST_OBJECT_UNLOCK (playbin);
}
static GstBusSyncReply
activate_sink_bus_handler (GstBus * bus, GstMessage * msg, GstPlayBin * playbin)
{
@ -4081,6 +4113,37 @@ activate_sink_bus_handler (GstBus * bus, GstMessage * msg, GstPlayBin * playbin)
gst_element_post_message (GST_ELEMENT_CAST (playbin), msg);
else
gst_message_unref (msg);
} else if (GST_MESSAGE_TYPE (msg) == GST_MESSAGE_NEED_CONTEXT) {
const gchar *context_type;
GList *l;
gst_message_parse_context_type (msg, &context_type);
GST_OBJECT_LOCK (playbin);
for (l = playbin->contexts; l; l = l->next) {
GstContext *tmp = l->data;
const gchar *tmp_type = gst_context_get_context_type (tmp);
if (strcmp (context_type, tmp_type) == 0) {
gst_element_set_context (GST_ELEMENT (GST_MESSAGE_SRC (msg)), l->data);
break;
}
}
GST_OBJECT_UNLOCK (playbin);
/* Forward if we couldn't answer the message */
if (l == NULL) {
gst_element_post_message (GST_ELEMENT_CAST (playbin), msg);
} else {
gst_message_unref (msg);
}
} else if (GST_MESSAGE_TYPE (msg) == GST_MESSAGE_HAVE_CONTEXT) {
GstContext *context;
gst_message_parse_have_context (msg, &context);
gst_play_bin_update_context (playbin, context);
gst_context_unref (context);
gst_element_post_message (GST_ELEMENT_CAST (playbin), msg);
} else {
gst_element_post_message (GST_ELEMENT_CAST (playbin), msg);
}
@ -5379,6 +5442,7 @@ gst_play_bin_change_state (GstElement * element, GstStateChange transition)
case GST_STATE_CHANGE_READY_TO_NULL:
{
guint i;
GList *l;
/* also do missed state change down to READY */
if (do_save)
@ -5425,6 +5489,25 @@ gst_play_bin_change_state (GstElement * element, GstStateChange transition)
/* make sure the groups don't perform a state change anymore until we
* enable them again */
groups_set_locked_state (playbin, TRUE);
/* Remove all non-persistent contexts */
GST_OBJECT_LOCK (playbin);
for (l = playbin->contexts; l;) {
GstContext *context = l->data;
if (!gst_context_is_persistent (context)) {
GList *next;
gst_context_unref (context);
next = l->next;
playbin->contexts = g_list_delete_link (playbin->contexts, l);
l = next;
} else {
l = l->next;
}
}
GST_OBJECT_UNLOCK (playbin);
break;
}
default: