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urisourcebin: Fix buffering message aggregation.

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Add locking, and handle EOS properly now that urisourcebin
uses custom events in place of real EOS events, so we
need to manually remove buffering messages and potentially
post 100% in that situation
This commit is contained in:
Jan Schmidt 2017-03-18 00:54:55 +11:00
parent 8cb57a4fe8
commit 94da76d301
1 changed files with 96 additions and 17 deletions
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113
gst/playback/gsturisourcebin.c
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@ -73,6 +73,23 @@ typedef struct _OutputSlotInfo OutputSlotInfo;
#define GST_URI_SOURCE_BIN_LOCK(dec) (g_mutex_lock(&((GstURISourceBin*)(dec))->lock))
#define GST_URI_SOURCE_BIN_UNLOCK(dec) (g_mutex_unlock(&((GstURISourceBin*)(dec))->lock))
#define BUFFERING_LOCK(ubin) G_STMT_START { \
GST_LOG_OBJECT (ubin, \
"buffering locking from thread %p", \
g_thread_self ()); \
g_mutex_lock (&GST_URI_SOURCE_BIN_CAST(ubin)->buffering_lock); \
GST_LOG_OBJECT (ubin, \
"buffering lock from thread %p", \
g_thread_self ()); \
} G_STMT_END
#define BUFFERING_UNLOCK(ubin) G_STMT_START { \
GST_LOG_OBJECT (ubin, \
"buffering unlocking from thread %p", \
g_thread_self ()); \
g_mutex_unlock (&GST_URI_SOURCE_BIN_CAST(ubin)->buffering_lock); \
} G_STMT_END
/* Track a source pad from a child that
* is linked or needs linking to an output
* slot */
@ -144,6 +161,8 @@ struct _GstURISourceBin
GList *buffering_status; /* element currently buffering messages */
gint last_buffering_pct; /* Avoid sending buffering over and over */
GMutex buffering_lock;
GMutex buffering_post_lock;
};
struct _GstURISourceBinClass
@ -725,6 +744,9 @@ gst_uri_source_bin_init (GstURISourceBin * urisrc)
g_mutex_init (&urisrc->lock);
g_mutex_init (&urisrc->buffering_lock);
g_mutex_init (&urisrc->buffering_post_lock);
urisrc->uri = g_strdup (DEFAULT_PROP_URI);
urisrc->connection_speed = DEFAULT_CONNECTION_SPEED;
@ -1002,6 +1024,9 @@ link_pending_pad_to_output (GstURISourceBin * urisrc, OutputSlotInfo * slot)
/* Look for a suitable pending pad */
cur_caps = gst_pad_get_current_caps (slot->sinkpad);
GST_DEBUG_OBJECT (urisrc,
"Looking for a pending pad with caps %" GST_PTR_FORMAT, cur_caps);
for (cur = urisrc->pending_pads; cur != NULL; cur = g_list_next (cur)) {
GstPad *pending = (GstPad *) (cur->data);
ChildSrcPadInfo *cur_info = NULL;
@ -1029,8 +1054,8 @@ link_pending_pad_to_output (GstURISourceBin * urisrc, OutputSlotInfo * slot)
guint block_id =
gst_pad_add_probe (slot->sinkpad, GST_PAD_PROBE_TYPE_BLOCK_UPSTREAM,
NULL, NULL, NULL);
GST_DEBUG_OBJECT (urisrc, "Linking pending pad to existing output slot %p",
slot);
GST_DEBUG_OBJECT (urisrc, "Linking pending pad %" GST_PTR_FORMAT
" to existing output slot %p", out_info->demux_src_pad, slot);
if (in_info) {
gst_pad_unlink (in_info->demux_src_pad, slot->sinkpad);
@ -1042,6 +1067,11 @@ link_pending_pad_to_output (GstURISourceBin * urisrc, OutputSlotInfo * slot)
slot->sinkpad) == GST_PAD_LINK_OK) {
out_info->output_slot = slot;
slot->linked_info = out_info;
BUFFERING_LOCK (urisrc);
/* A re-linked slot is no longer EOS */
slot->is_eos = FALSE;
BUFFERING_UNLOCK (urisrc);
res = TRUE;
urisrc->pending_pads =
g_list_remove (urisrc->pending_pads, out_info->demux_src_pad);
@ -1093,8 +1123,14 @@ demux_pad_events (GstPad * pad, GstPadProbeInfo * info, gpointer user_data)
goto done;
}
BUFFERING_LOCK (urisrc);
/* Mark that we fed an EOS to this slot */
child_info->output_slot->is_eos = TRUE;
BUFFERING_UNLOCK (urisrc);
/* EOS means this element is no longer buffering */
remove_buffering_msgs (urisrc,
GST_OBJECT_CAST (child_info->output_slot->queue));
/* Actually feed a custom EOS event to avoid marking pads as EOSed */
s = gst_structure_new_empty ("urisourcebin-custom-eos");
@ -1112,7 +1148,9 @@ demux_pad_events (GstPad * pad, GstPadProbeInfo * info, gpointer user_data)
break;
case GST_EVENT_STREAM_START:
case GST_EVENT_FLUSH_STOP:
BUFFERING_LOCK (urisrc);
child_info->output_slot->is_eos = FALSE;
BUFFERING_UNLOCK (urisrc);
break;
default:
break;
@ -1370,17 +1408,23 @@ pad_removed_cb (GstElement * element, GstPad * pad, GstURISourceBin * urisrc)
GstEvent *event;
OutputSlotInfo *slot;
if (!info->output_slot->is_eos && urisrc->pending_pads &&
link_pending_pad_to_output (urisrc, info->output_slot)) {
slot = info->output_slot;
if (!slot->is_eos && urisrc->pending_pads &&
link_pending_pad_to_output (urisrc, slot)) {
/* Found a new source pad to give this slot data - no need to send EOS */
GST_URI_SOURCE_BIN_UNLOCK (urisrc);
return;
}
/* Unlink this pad from its output slot and send a fake EOS event to drain the
* queue */
slot = info->output_slot;
BUFFERING_LOCK (urisrc);
/* Unlink this pad from its output slot and send a fake EOS event
* to drain the queue */
slot->is_eos = TRUE;
BUFFERING_UNLOCK (urisrc);
remove_buffering_msgs (urisrc, GST_OBJECT_CAST (slot->queue));
slot->linked_info = NULL;
info->output_slot = NULL;
@ -2378,7 +2422,7 @@ handle_redirect_message (GstURISourceBin * dec, GstMessage * msg)
return new_msg;
}
static GstMessage *
static void
handle_buffering_message (GstURISourceBin * urisrc, GstMessage * msg)
{
gint perc, msg_perc;
@ -2386,6 +2430,7 @@ handle_buffering_message (GstURISourceBin * urisrc, GstMessage * msg)
GstMessage *smaller = NULL;
GList *found = NULL;
GList *iter;
OutputSlotInfo *slot;
/* buffering messages must be aggregated as there might be multiple
* multiqueue in the pipeline and their independent buffering messages
@ -2405,7 +2450,22 @@ handle_buffering_message (GstURISourceBin * urisrc, GstMessage * msg)
GST_LOG_OBJECT (urisrc, "Got buffering msg from %" GST_PTR_FORMAT
" with %d%%", GST_MESSAGE_SRC (msg), msg_perc);
GST_OBJECT_LOCK (urisrc);
slot = g_object_get_data (G_OBJECT (GST_MESSAGE_SRC (msg)),
"urisourcebin.slotinfo");
BUFFERING_LOCK (urisrc);
if (slot && slot->is_eos) {
/* Ignore buffering messages from queues we marked as EOS,
* we already removed those from the list of buffering
* objects */
BUFFERING_UNLOCK (urisrc);
gst_message_replace (&msg, NULL);
return;
}
g_mutex_lock (&urisrc->buffering_post_lock);
/*
* Single loop for 2 things:
* 1) Look for a message with the same source
@ -2414,11 +2474,10 @@ handle_buffering_message (GstURISourceBin * urisrc, GstMessage * msg)
*/
for (iter = urisrc->buffering_status; iter;) {
GstMessage *bufstats = iter->data;
OutputSlotInfo *slot =
g_object_get_data (G_OBJECT (GST_MESSAGE_SRC (bufstats)),
"urisourcebin.slotinfo");
gboolean is_eos = FALSE;
slot = g_object_get_data (G_OBJECT (GST_MESSAGE_SRC (bufstats)),
"urisourcebin.slotinfo");
if (slot)
is_eos = slot->is_eos;
@ -2477,16 +2536,17 @@ handle_buffering_message (GstURISourceBin * urisrc, GstMessage * msg)
gst_message_replace (&msg, smaller);
}
}
GST_OBJECT_UNLOCK (urisrc);
BUFFERING_UNLOCK (urisrc);
if (msg) {
GST_LOG_OBJECT (urisrc, "Sending buffering msg from %" GST_PTR_FORMAT
" with %d%%", GST_MESSAGE_SRC (msg), smaller_perc);
GST_BIN_CLASS (parent_class)->handle_message (GST_BIN (urisrc), msg);
} else {
GST_LOG_OBJECT (urisrc, "Dropped buffering msg as a repeat of %d%%",
smaller_perc);
}
return msg;
g_mutex_unlock (&urisrc->buffering_post_lock);
}
/* Remove any buffering message from the given source */
@ -2494,8 +2554,14 @@ static void
remove_buffering_msgs (GstURISourceBin * urisrc, GstObject * src)
{
GList *iter;
gboolean removed = FALSE, post;
BUFFERING_LOCK (urisrc);
g_mutex_lock (&urisrc->buffering_post_lock);
GST_DEBUG_OBJECT (urisrc, "Removing %" GST_PTR_FORMAT
" buffering messages", src);
GST_OBJECT_LOCK (urisrc);
for (iter = urisrc->buffering_status; iter;) {
GstMessage *bufstats = iter->data;
if (GST_MESSAGE_SRC (bufstats) == src) {
@ -2506,7 +2572,19 @@ remove_buffering_msgs (GstURISourceBin * urisrc, GstObject * src)
}
iter = g_list_next (iter);
}
GST_OBJECT_UNLOCK (urisrc);
post = (removed && urisrc->buffering_status == NULL);
BUFFERING_UNLOCK (urisrc);
if (post) {
GST_DEBUG_OBJECT (urisrc, "Last buffering element done - posting 100%%");
/* removed the last buffering element, post 100% */
gst_element_post_message (GST_ELEMENT_CAST (urisrc),
gst_message_new_buffering (GST_OBJECT_CAST (urisrc), 100));
}
g_mutex_unlock (&urisrc->buffering_post_lock);
}
static void
@ -2526,7 +2604,8 @@ handle_message (GstBin * bin, GstMessage * msg)
break;
}
case GST_MESSAGE_BUFFERING:
msg = handle_buffering_message (urisrc, msg);
handle_buffering_message (urisrc, msg);
msg = NULL;
break;
default:
break;