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decodebin: lock the expose lock around decode_chain use

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Helps with a crash in decodebin when quickly switching states.

https://bugzilla.gnome.org/show_bug.cgi?id=752651
This commit is contained in:
Vincent Penquerc'h 2015-08-20 17:29:36 +01:00
parent 2a70c86e85
commit ee44337fc3
1 changed files with 14 additions and 8 deletions
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18
gst/playback/gstdecodebin2.c
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@ -1430,7 +1430,8 @@ static gboolean connect_pad (GstDecodeBin * dbin, GstElement * src,
static GList *connect_element (GstDecodeBin * dbin, GstDecodeElement * delem,
GstDecodeChain * chain);
static void expose_pad (GstDecodeBin * dbin, GstElement * src,
GstDecodePad * dpad, GstPad * pad, GstCaps * caps, GstDecodeChain * chain);
GstDecodePad * dpad, GstPad * pad, GstCaps * caps, GstDecodeChain * chain,
gboolean lock);
static void pad_added_cb (GstElement * element, GstPad * pad,
GstDecodeChain * chain);
@ -2208,7 +2209,7 @@ connect_pad (GstDecodeBin * dbin, GstElement * src, GstDecodePad * dpad,
case GST_AUTOPLUG_SELECT_EXPOSE:
GST_DEBUG_OBJECT (dbin, "autoplug select requested expose");
/* expose the pad, we don't have the source element */
expose_pad (dbin, src, dpad, pad, caps, chain);
expose_pad (dbin, src, dpad, pad, caps, chain, TRUE);
res = TRUE;
goto beach;
case GST_AUTOPLUG_SELECT_SKIP:
@ -2563,7 +2564,7 @@ connect_pad (GstDecodeBin * dbin, GstElement * src, GstDecodePad * dpad,
GstCaps *ocaps;
ocaps = get_pad_caps (opad);
expose_pad (dbin, delem->element, dpad, opad, ocaps, chain);
expose_pad (dbin, delem->element, dpad, opad, ocaps, chain, TRUE);
if (ocaps)
gst_caps_unref (ocaps);
@ -2705,7 +2706,7 @@ connect_element (GstDecodeBin * dbin, GstDecodeElement * delem,
*/
static void
expose_pad (GstDecodeBin * dbin, GstElement * src, GstDecodePad * dpad,
GstPad * pad, GstCaps * caps, GstDecodeChain * chain)
GstPad * pad, GstCaps * caps, GstDecodeChain * chain, gboolean lock)
{
GstPad *mqpad = NULL;
@ -2732,12 +2733,14 @@ expose_pad (GstDecodeBin * dbin, GstElement * src, GstDecodePad * dpad,
chain->endpad = gst_object_ref (dpad);
chain->endcaps = gst_caps_ref (caps);
if (lock)
EXPOSE_LOCK (dbin);
if (dbin->decode_chain) {
if (gst_decode_chain_is_complete (dbin->decode_chain)) {
gst_decode_bin_expose (dbin);
}
}
if (lock)
EXPOSE_UNLOCK (dbin);
if (mqpad)
@ -2804,6 +2807,7 @@ type_found (GstElement * typefind, guint probability,
goto exit;
}
EXPOSE_LOCK (decode_bin);
/* FIXME: we can only deal with one type, we don't yet support dynamically changing
* caps from the typefind element */
if (decode_bin->have_type || decode_bin->decode_chain)
@ -2823,13 +2827,14 @@ type_found (GstElement * typefind, guint probability,
if (analyze_new_pad (decode_bin, typefind, pad, caps,
decode_bin->decode_chain, NULL))
expose_pad (decode_bin, typefind, decode_bin->decode_chain->current_pad,
pad, caps, decode_bin->decode_chain);
pad, caps, decode_bin->decode_chain, FALSE);
GST_PAD_STREAM_UNLOCK (sink_pad);
gst_object_unref (sink_pad);
gst_object_unref (pad);
exit:
EXPOSE_UNLOCK (decode_bin);
return;
}
@ -2878,7 +2883,8 @@ pad_added_cb (GstElement * element, GstPad * pad, GstDecodeChain * chain)
caps = get_pad_caps (pad);
if (analyze_new_pad (dbin, element, pad, caps, chain, &new_chain))
expose_pad (dbin, element, new_chain->current_pad, pad, caps, new_chain);
expose_pad (dbin, element, new_chain->current_pad, pad, caps, new_chain,
TRUE);
if (caps)
gst_caps_unref (caps);