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xvimagesink: Don't share internal pool

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Sharing the internal pool results in situation where the pool may have
two upstream owners. This creates a race upon deactivation. Instead,
always offer a new pool, and keep the internal pool internal in case
we absolutely need it.

https://bugzilla.gnome.org/show_bug.cgi?id=748344
This commit is contained in:
Nicolas Dufresne 2015-06-05 14:30:12 -04:00 committed by Nicolas Dufresne
parent ae20ba7ad4
commit df313a6dbc
1 changed files with 37 additions and 55 deletions
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92
sys/xvimage/xvimagesink.c
View file

@ -659,19 +659,42 @@ gst_xvimagesink_getcaps (GstBaseSink * bsink, GstCaps * filter)
return caps;
}
static GstBufferPool *
gst_xvimagesink_create_pool (GstXvImageSink * xvimagesink, GstCaps * caps,
gsize size, gint min)
{
GstBufferPool *pool;
GstStructure *config;
pool = gst_xvimage_buffer_pool_new (xvimagesink->allocator);
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_set_params (config, caps, size, min, 0);
if (!gst_buffer_pool_set_config (pool, config))
goto config_failed;
return pool;
config_failed:
{
GST_ERROR_OBJECT (xvimagesink, "failed to set config.");
gst_object_unref (pool);
return NULL;
}
}
static gboolean
gst_xvimagesink_setcaps (GstBaseSink * bsink, GstCaps * caps)
{
GstXvImageSink *xvimagesink;
GstXvContext *context;
GstStructure *structure;
GstBufferPool *newpool, *oldpool;
GstVideoInfo info;
guint32 im_format = 0;
gint video_par_n, video_par_d; /* video's PAR */
gint display_par_n, display_par_d; /* display's PAR */
guint num, den;
gint size;
xvimagesink = GST_XVIMAGESINK (bsink);
context = xvimagesink->context;
@ -698,8 +721,6 @@ gst_xvimagesink_setcaps (GstBaseSink * bsink, GstCaps * caps)
gst_xvcontext_set_colorimetry (context, &info.colorimetry);
size = info.size;
/* get aspect ratio from caps if it's present, and
* convert video width and height to a display width and height
* using wd / hd = wv / hv * PARv / PARd */
@ -778,24 +799,16 @@ gst_xvimagesink_setcaps (GstBaseSink * bsink, GstCaps * caps)
xvimagesink->redraw_border = TRUE;
/* create a new pool for the new configuration */
newpool = gst_xvimage_buffer_pool_new (xvimagesink->allocator);
structure = gst_buffer_pool_get_config (newpool);
gst_buffer_pool_config_set_params (structure, caps, size, 2, 0);
if (!gst_buffer_pool_set_config (newpool, structure))
goto config_failed;
newpool = gst_xvimagesink_create_pool (xvimagesink, caps, info.size, 2);
/* we don't activate the internal pool yet as it may not be needed */
oldpool = xvimagesink->pool;
/* we don't activate the pool yet, this will be done by downstream after it
* has configured the pool. If downstream does not want our pool we will
* activate it when we render into it */
xvimagesink->pool = newpool;
g_mutex_unlock (&xvimagesink->flow_lock);
/* unref the old sink */
/* deactivate and unref the old internal pool */
if (oldpool) {
/* we don't deactivate, some elements might still be using it, it will
* be deactivated when the last ref is gone */
gst_buffer_pool_set_active (oldpool, FALSE);
gst_object_unref (oldpool);
}
@ -825,13 +838,6 @@ no_display_size:
("Error calculating the output display ratio of the video."));
return FALSE;
}
config_failed:
{
GST_ERROR_OBJECT (xvimagesink, "failed to set config.");
gst_object_unref (newpool);
g_mutex_unlock (&xvimagesink->flow_lock);
return FALSE;
}
}
static GstStateChangeReturn
@ -1043,8 +1049,7 @@ static gboolean
gst_xvimagesink_propose_allocation (GstBaseSink * bsink, GstQuery * query)
{
GstXvImageSink *xvimagesink = GST_XVIMAGESINK (bsink);
GstBufferPool *pool;
GstStructure *config;
GstBufferPool *pool = NULL;
GstCaps *caps;
guint size;
gboolean need_pool;
@ -1054,44 +1059,22 @@ gst_xvimagesink_propose_allocation (GstBaseSink * bsink, GstQuery * query)
if (caps == NULL)
goto no_caps;
g_mutex_lock (&xvimagesink->flow_lock);
if ((pool = xvimagesink->pool))
gst_object_ref (pool);
g_mutex_unlock (&xvimagesink->flow_lock);
if (pool != NULL) {
GstCaps *pcaps;
/* we had a pool, check caps */
GST_DEBUG_OBJECT (xvimagesink, "check existing pool caps");
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_get_params (config, &pcaps, &size, NULL, NULL);
if (!gst_caps_is_equal (caps, pcaps)) {
GST_DEBUG_OBJECT (xvimagesink, "pool has different caps");
/* different caps, we can't use this pool */
gst_object_unref (pool);
pool = NULL;
}
gst_structure_free (config);
}
if (pool == NULL && need_pool) {
if (need_pool) {
GstVideoInfo info;
if (!gst_video_info_from_caps (&info, caps))
goto invalid_caps;
GST_DEBUG_OBJECT (xvimagesink, "create new pool");
pool = gst_xvimage_buffer_pool_new (xvimagesink->allocator);
pool = gst_xvimagesink_create_pool (xvimagesink, caps, info.size, 0);
/* the normal size of a frame */
size = info.size;
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_set_params (config, caps, size, 0, 0);
if (!gst_buffer_pool_set_config (pool, config))
goto config_failed;
if (pool == NULL)
goto no_pool;
}
if (pool) {
/* we need at least 2 buffer because we hold on to the last one */
gst_query_add_allocation_pool (query, pool, size, 2, 0);
@ -1115,10 +1098,9 @@ invalid_caps:
GST_DEBUG_OBJECT (bsink, "invalid caps specified");
return FALSE;
}
config_failed:
no_pool:
{
GST_DEBUG_OBJECT (bsink, "failed setting config");
gst_object_unref (pool);
/* Already warned in create_pool */
return FALSE;
}
}