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decodebin3: fix random hang when remove failing stream

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When reconfigure_output_stream entry missing decoder path,
requested_selection should been update with what is really
active/selected immdiately with SELECTION_LOCK hold. So
use an optional message return from reconfigure_output_stream
and post it after release SELECTION_LOCK. This can make sure
other thread call to check_slot_reconfiguration will got
a correct requested_selection.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4656>
This commit is contained in:
Haihua Hu 2023-05-10 16:34:16 +08:00 committed by GStreamer Marge Bot
parent c932134637
commit d784bbe6ca
1 changed files with 11 additions and 11 deletions
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22
subprojects/gst-plugins-base/gst/playback/gstdecodebin3.c
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@ -497,7 +497,7 @@ static DecodebinInput *create_new_input (GstDecodebin3 * dbin, gboolean main);
static gboolean set_input_group_id (DecodebinInput * input, guint32 * group_id);
static gboolean reconfigure_output_stream (DecodebinOutputStream * output,
MultiQueueSlot * slot);
MultiQueueSlot * slot, GstMessage ** msg);
static void free_output_stream (GstDecodebin3 * dbin,
DecodebinOutputStream * output);
static DecodebinOutputStream *create_output_stream (GstDecodebin3 * dbin,
@ -2328,6 +2328,7 @@ static void
check_slot_reconfiguration (GstDecodebin3 * dbin, MultiQueueSlot * slot)
{
DecodebinOutputStream *output;
GstMessage *msg = NULL;
SELECTION_LOCK (dbin);
output = get_output_for_slot (slot);
@ -2336,7 +2337,7 @@ check_slot_reconfiguration (GstDecodebin3 * dbin, MultiQueueSlot * slot)
return;
}
if (!reconfigure_output_stream (output, slot)) {
if (!reconfigure_output_stream (output, slot, &msg)) {
GST_DEBUG_OBJECT (dbin, "Removing failing stream from selection: %s ",
gst_stream_get_stream_id (slot->active_stream));
slot->dbin->requested_selection =
@ -2344,12 +2345,14 @@ check_slot_reconfiguration (GstDecodebin3 * dbin, MultiQueueSlot * slot)
gst_stream_get_stream_id (slot->active_stream));
dbin->selection_updated = TRUE;
SELECTION_UNLOCK (dbin);
reassign_slot (dbin, slot);
} else {
GstMessage *msg = is_selection_done (dbin);
SELECTION_UNLOCK (dbin);
if (msg)
gst_element_post_message ((GstElement *) slot->dbin, msg);
reassign_slot (dbin, slot);
} else {
GstMessage *selection_msg = is_selection_done (dbin);
SELECTION_UNLOCK (dbin);
if (selection_msg)
gst_element_post_message ((GstElement *) slot->dbin, selection_msg);
}
}
@ -2743,7 +2746,7 @@ keyframe_waiter_probe (GstPad * pad, GstPadProbeInfo * info,
* associated GstStreams should be disabled */
static gboolean
reconfigure_output_stream (DecodebinOutputStream * output,
MultiQueueSlot * slot)
MultiQueueSlot * slot, GstMessage ** msg)
{
GstDecodebin3 *dbin = output->dbin;
GstCaps *new_caps = (GstCaps *) gst_stream_get_caps (slot->active_stream);
@ -2851,14 +2854,11 @@ reconfigure_output_stream (DecodebinOutputStream * output,
if (output->decoder == NULL) {
GstCaps *caps;
SELECTION_UNLOCK (dbin);
/* FIXME : Should we be smarter if there's a missing decoder ?
* Should we deactivate that stream ? */
caps = gst_stream_get_caps (slot->active_stream);
gst_element_post_message (GST_ELEMENT_CAST (dbin),
gst_missing_decoder_message_new (GST_ELEMENT_CAST (dbin), caps));
*msg = gst_missing_decoder_message_new (GST_ELEMENT_CAST (dbin), caps);
gst_caps_unref (caps);
SELECTION_LOCK (dbin);
ret = FALSE;
goto cleanup;
}