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playbin2: Only allow to set the URIs in states <= READY or from an about-to-finish signal handler

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Changing the URIs in a state > READY results in unexpected behaviour,
i.e. the new URIs are only used after the current track has finished.

Fixes bug #607226.
This commit is contained in:
Sebastian Dröge 2010-01-18 09:30:18 +01:00
parent 2482a536ac
commit 7335ce5d3e
1 changed files with 24 additions and 0 deletions
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24
gst/playback/gstplaybin2.c
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@ -555,6 +555,12 @@ static void gst_play_bin_suburidecodebin_block (GstElement * suburidecodebin,
static void gst_play_bin_suburidecodebin_seek_to_start (GstElement *
suburidecodebin);
/* This is non-NULL if the current thread is inside an about-to-finish signal handler,
* which is the only place where the currently set URI or subtitle URI is allowed
* to be changed in states >= PAUSED.
*/
static GStaticPrivate _in_about_to_finish_handler = G_STATIC_PRIVATE_INIT;
static GstElementClass *parent_class;
static guint gst_play_bin_signals[LAST_SIGNAL] = { 0 };
@ -1225,12 +1231,19 @@ static void
gst_play_bin_set_uri (GstPlayBin * playbin, const gchar * uri)
{
GstSourceGroup *group;
gboolean in_about_to_finish_handler;
in_about_to_finish_handler
= g_static_private_get (&_in_about_to_finish_handler) != NULL;
if (uri == NULL) {
g_warning ("cannot set NULL uri");
return;
}
g_return_if_fail (GST_STATE (playbin) < GST_STATE_PAUSED ||
in_about_to_finish_handler);
GST_PLAY_BIN_LOCK (playbin);
group = playbin->next_group;
@ -1249,6 +1262,13 @@ static void
gst_play_bin_set_suburi (GstPlayBin * playbin, const gchar * suburi)
{
GstSourceGroup *group;
gboolean in_about_to_finish_handler;
in_about_to_finish_handler
= g_static_private_get (&_in_about_to_finish_handler) != NULL;
g_return_if_fail (GST_STATE (playbin) < GST_STATE_PAUSED ||
in_about_to_finish_handler);
GST_PLAY_BIN_LOCK (playbin);
group = playbin->next_group;
@ -2936,9 +2956,11 @@ drained_cb (GstElement * decodebin, GstSourceGroup * group)
GST_DEBUG_OBJECT (playbin, "about to finish in group %p", group);
g_static_private_set (&_in_about_to_finish_handler, (gpointer) 1, NULL);
/* after this call, we should have a next group to activate or we EOS */
g_signal_emit (G_OBJECT (playbin),
gst_play_bin_signals[SIGNAL_ABOUT_TO_FINISH], 0, NULL);
g_static_private_set (&_in_about_to_finish_handler, NULL, NULL);
/* now activate the next group. If the app did not set a uri, this will
* fail and we can do EOS */
@ -3641,6 +3663,8 @@ gst_play_bin2_plugin_init (GstPlugin * plugin)
g_type_class_ref (gst_input_selector_get_type ());
g_type_class_ref (gst_selector_pad_get_type ());
g_static_private_set (&_in_about_to_finish_handler, NULL, NULL);
return gst_element_register (plugin, "playbin2", GST_RANK_NONE,
GST_TYPE_PLAY_BIN);
}