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kmssink: Track cached kmsmem and clear them on drain

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In this patch we keep track of the cached kmsmem in a way
that we can clear the cache during the drain process. This
release the framebuffer before waiting for the next vblank,
hence add support for DRM driver (like Intel one) that release
the associated DMABuf reference asynchronously.

https://bugzilla.gnome.org/show_bug.cgi?id=782774
This commit is contained in:
Nicolas Dufresne 2017-07-07 12:13:27 -04:00
parent 98b91d09c2
commit 0a0bc8ab94
2 changed files with 43 additions and 2 deletions
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44
sys/kms/gstkmssink.c
View file

@ -496,8 +496,45 @@ get_cached_kmsmem (GstMemory * mem)
}
static void
set_cached_kmsmem (GstMemory * mem, GstMemory * kmsmem)
cached_kmsmem_disposed_cb (GstKMSSink * self, GstMiniObject * obj)
{
GST_OBJECT_LOCK (self);
self->mem_cache = g_list_remove (self->mem_cache, obj);
GST_OBJECT_UNLOCK (self);
}
static void
clear_cached_kmsmem (GstKMSSink * self)
{
GList *iter;
GST_OBJECT_LOCK (self);
iter = self->mem_cache;
while (iter) {
GstMiniObject *obj = iter->data;
gst_mini_object_weak_unref (obj,
(GstMiniObjectNotify) cached_kmsmem_disposed_cb, self);
gst_mini_object_set_qdata (obj,
g_quark_from_static_string ("kmsmem"), NULL, NULL);
iter = iter->next;
}
g_list_free (self->mem_cache);
self->mem_cache = NULL;
GST_OBJECT_UNLOCK (self);
}
static void
set_cached_kmsmem (GstKMSSink * self, GstMemory * mem, GstMemory * kmsmem)
{
GST_OBJECT_LOCK (self);
gst_mini_object_weak_ref (GST_MINI_OBJECT (mem),
(GstMiniObjectNotify) cached_kmsmem_disposed_cb, self);
self->mem_cache = g_list_prepend (self->mem_cache, mem);
GST_OBJECT_UNLOCK (self);
return gst_mini_object_set_qdata (GST_MINI_OBJECT (mem),
g_quark_from_static_string ("kmsmem"), kmsmem,
(GDestroyNotify) gst_memory_unref);
@ -693,6 +730,8 @@ gst_kms_sink_stop (GstBaseSink * bsink)
self = GST_KMS_SINK (bsink);
clear_cached_kmsmem (self);
gst_buffer_replace (&self->last_buffer, NULL);
gst_caps_replace (&self->allowed_caps, NULL);
gst_object_replace ((GstObject **) & self->pool, NULL);
@ -1130,7 +1169,7 @@ gst_kms_sink_import_dmabuf (GstKMSSink * self, GstBuffer * inbuf,
GST_LOG_OBJECT (self, "setting KMS mem %p to DMABuf mem %p with fb id = %d",
kmsmem, mems[0], kmsmem->fb_id);
set_cached_kmsmem (mems[0], GST_MEMORY_CAST (kmsmem));
set_cached_kmsmem (self, mems[0], GST_MEMORY_CAST (kmsmem));
wrap_mem:
*outbuf = gst_buffer_new ();
@ -1359,6 +1398,7 @@ gst_kms_sink_drain (GstKMSSink * self)
if (parent_meta) {
GstBuffer *dumb_buf;
dumb_buf = gst_kms_sink_copy_to_dumb_buffer (self, parent_meta->buffer);
clear_cached_kmsmem (self);
gst_kms_sink_show_frame (GST_VIDEO_SINK (self), dumb_buf);
}
}

1
sys/kms/gstkmssink.h
View file

@ -71,6 +71,7 @@ struct _GstKMSSink {
GstAllocator *allocator;
GstBuffer *last_buffer;
GstMemory *tmp_kmsmem;
GList *mem_cache;
gchar *devname;