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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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22
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, static GList *connect_element (GstDecodeBin * dbin, GstDecodeElement * delem,
GstDecodeChain * chain); GstDecodeChain * chain);
static void expose_pad (GstDecodeBin * dbin, GstElement * src, 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, static void pad_added_cb (GstElement * element, GstPad * pad,
GstDecodeChain * chain); GstDecodeChain * chain);
@ -2208,7 +2209,7 @@ connect_pad (GstDecodeBin * dbin, GstElement * src, GstDecodePad * dpad,
case GST_AUTOPLUG_SELECT_EXPOSE: case GST_AUTOPLUG_SELECT_EXPOSE:
GST_DEBUG_OBJECT (dbin, "autoplug select requested expose"); GST_DEBUG_OBJECT (dbin, "autoplug select requested expose");
/* expose the pad, we don't have the source element */ /* 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; res = TRUE;
goto beach; goto beach;
case GST_AUTOPLUG_SELECT_SKIP: case GST_AUTOPLUG_SELECT_SKIP:
@ -2563,7 +2564,7 @@ connect_pad (GstDecodeBin * dbin, GstElement * src, GstDecodePad * dpad,
GstCaps *ocaps; GstCaps *ocaps;
ocaps = get_pad_caps (opad); 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) if (ocaps)
gst_caps_unref (ocaps); gst_caps_unref (ocaps);
@ -2705,7 +2706,7 @@ connect_element (GstDecodeBin * dbin, GstDecodeElement * delem,
*/ */
static void static void
expose_pad (GstDecodeBin * dbin, GstElement * src, GstDecodePad * dpad, 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; GstPad *mqpad = NULL;
@ -2732,13 +2733,15 @@ expose_pad (GstDecodeBin * dbin, GstElement * src, GstDecodePad * dpad,
chain->endpad = gst_object_ref (dpad); chain->endpad = gst_object_ref (dpad);
chain->endcaps = gst_caps_ref (caps); chain->endcaps = gst_caps_ref (caps);
EXPOSE_LOCK (dbin); if (lock)
EXPOSE_LOCK (dbin);
if (dbin->decode_chain) { if (dbin->decode_chain) {
if (gst_decode_chain_is_complete (dbin->decode_chain)) { if (gst_decode_chain_is_complete (dbin->decode_chain)) {
gst_decode_bin_expose (dbin); gst_decode_bin_expose (dbin);
} }
} }
EXPOSE_UNLOCK (dbin); if (lock)
EXPOSE_UNLOCK (dbin);
if (mqpad) if (mqpad)
gst_object_unref (mqpad); gst_object_unref (mqpad);
@ -2804,6 +2807,7 @@ type_found (GstElement * typefind, guint probability,
goto exit; goto exit;
} }
EXPOSE_LOCK (decode_bin);
/* FIXME: we can only deal with one type, we don't yet support dynamically changing /* FIXME: we can only deal with one type, we don't yet support dynamically changing
* caps from the typefind element */ * caps from the typefind element */
if (decode_bin->have_type || decode_bin->decode_chain) 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, if (analyze_new_pad (decode_bin, typefind, pad, caps,
decode_bin->decode_chain, NULL)) decode_bin->decode_chain, NULL))
expose_pad (decode_bin, typefind, decode_bin->decode_chain->current_pad, 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_PAD_STREAM_UNLOCK (sink_pad);
gst_object_unref (sink_pad); gst_object_unref (sink_pad);
gst_object_unref (pad); gst_object_unref (pad);
exit: exit:
EXPOSE_UNLOCK (decode_bin);
return; return;
} }
@ -2878,7 +2883,8 @@ pad_added_cb (GstElement * element, GstPad * pad, GstDecodeChain * chain)
caps = get_pad_caps (pad); caps = get_pad_caps (pad);
if (analyze_new_pad (dbin, element, pad, caps, chain, &new_chain)) 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) if (caps)
gst_caps_unref (caps); gst_caps_unref (caps);