/**
* gst_object_replace:
* @oldobj: (inout) (transfer full): pointer to a place of a #GstObject to
* replace
* @newobj: (transfer none): a new #GstObject
*
* Unrefs the #GstObject pointed to by @oldobj, refs @newobj and
* puts @newobj in *@oldobj. Be carefull when calling this
* function, it does not take any locks. You might want to lock
* the object owning @oldobj pointer before calling this
* function.
*
* Make sure not to LOCK @oldobj because it might be unreffed
* which could cause a deadlock when it is disposed.
*
* Since 0.10.36, this function operates atomically.
*/
void
gst_object_replace (GstObject ** oldobj, GstObject * newobj)
{
GstObject *oldptr;
g_return_if_fail (oldobj != NULL);
g_return_if_fail (*oldobj == NULL || GST_IS_OBJECT (*oldobj));
g_return_if_fail (newobj == NULL || GST_IS_OBJECT (newobj));
#ifdef DEBUG_REFCOUNT
GST_CAT_TRACE (GST_CAT_REFCOUNTING, "replace %p %s (%d) with %p %s (%d)",
*oldobj, *oldobj ? GST_STR_NULL (GST_OBJECT_NAME (*oldobj)) : "(NONE)",
*oldobj ? G_OBJECT (*oldobj)->ref_count : 0,
newobj, newobj ? GST_STR_NULL (GST_OBJECT_NAME (newobj)) : "(NONE)",
newobj ? G_OBJECT (newobj)->ref_count : 0);
#endif
if (newobj)
g_object_ref (newobj);
do {
oldptr = *oldobj;
} while (!G_ATOMIC_POINTER_COMPARE_AND_EXCHANGE (oldobj, oldptr, newobj));
if (oldptr)
g_object_unref (oldptr);
}
/**
* gst_mini_object_unlock:
* @object: the mini-object to unlock
* @flags: #GstLockFlags
*
* Unlock the mini-object with the specified access mode in @flags.
*/
void
gst_mini_object_unlock (GstMiniObject * object, GstLockFlags flags)
{
gint access_mode, state, newstate;
g_return_if_fail (object != NULL);
g_return_if_fail (GST_MINI_OBJECT_IS_LOCKABLE (object));
do {
access_mode = flags & FLAG_MASK;
newstate = state = g_atomic_int_get (&object->lockstate);
GST_CAT_TRACE (GST_CAT_LOCKING, "unlock %p: state %08x, access_mode %d",
object, state, access_mode);
if (access_mode & GST_LOCK_FLAG_EXCLUSIVE) {
/* shared counter */
g_return_if_fail (state >= SHARE_ONE);
newstate -= SHARE_ONE;
access_mode &= ~GST_LOCK_FLAG_EXCLUSIVE;
}
if (access_mode) {
g_return_if_fail ((state & access_mode) == access_mode);
/* decrease the refcount */
newstate -= LOCK_ONE;
/* last refcount, unset access_mode */
if ((newstate & LOCK_FLAG_MASK) == access_mode)
newstate &= ~LOCK_FLAG_MASK;
}
} while (!g_atomic_int_compare_and_exchange (&object->lockstate, state,
newstate));
}
static void
_generate_texture (GstGLContext * context, GenTexture * data)
{
const GstGLFuncs *gl = context->gl_vtable;
GLenum internal_format;
GST_CAT_TRACE (GST_CAT_GL_MEMORY,
"Generating texture format:%u type:%u dimensions:%ux%u", data->gl_format,
data->gl_type, data->width, data->height);
internal_format =
_sized_gl_format_from_gl_format_type (data->gl_format, data->gl_type);
gl->GenTextures (1, &data->result);
gl->BindTexture (GL_TEXTURE_2D, data->result);
gl->TexImage2D (GL_TEXTURE_2D, 0, internal_format, data->width,
data->height, 0, data->gl_format, data->gl_type, NULL);
gl->TexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
gl->TexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
gl->TexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
gl->TexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
GST_CAT_LOG (GST_CAT_GL_MEMORY, "generated texture id:%d", data->result);
}
/**
* gst_object_replace:
* @oldobj: (inout) (transfer full): pointer to a place of a #GstObject to
* replace
* @newobj: (transfer none): a new #GstObject
*
* Atomically modifies a pointer to point to a new object.
* The reference count of @oldobj is decreased and the reference count of
* @newobj is increased.
*
* Either @newobj and the value pointed to by @oldobj may be NULL.
*
* Returns: TRUE if @newobj was different from @oldobj
*/
gboolean
gst_object_replace (GstObject ** oldobj, GstObject * newobj)
{
GstObject *oldptr;
g_return_val_if_fail (oldobj != NULL, FALSE);
#ifdef DEBUG_REFCOUNT
GST_CAT_TRACE (GST_CAT_REFCOUNTING, "replace %p %s (%d) with %p %s (%d)",
*oldobj, *oldobj ? GST_STR_NULL (GST_OBJECT_NAME (*oldobj)) : "(NONE)",
*oldobj ? G_OBJECT (*oldobj)->ref_count : 0,
newobj, newobj ? GST_STR_NULL (GST_OBJECT_NAME (newobj)) : "(NONE)",
newobj ? G_OBJECT (newobj)->ref_count : 0);
#endif
oldptr = g_atomic_pointer_get ((gpointer *) oldobj);
if (G_UNLIKELY (oldptr == newobj))
return FALSE;
if (newobj)
gst_object_ref (newobj);
while (G_UNLIKELY (!g_atomic_pointer_compare_and_exchange ((gpointer *)
oldobj, oldptr, newobj))) {
oldptr = g_atomic_pointer_get ((gpointer *) oldobj);
if (G_UNLIKELY (oldptr == newobj))
break;
}
if (oldptr)
gst_object_unref (oldptr);
return oldptr != newobj;
}
/**
* gst_mini_object_replace:
* @olddata: (inout) (transfer full): pointer to a pointer to a mini-object to
* be replaced
* @newdata: pointer to new mini-object
*
* Atomically modifies a pointer to point to a new mini-object.
* The reference count of @olddata is decreased and the reference count of
* @newdata is increased.
*
* Either @newdata and the value pointed to by @olddata may be NULL.
*
* Returns: TRUE if @newdata was different from @olddata
*/
gboolean
gst_mini_object_replace (GstMiniObject ** olddata, GstMiniObject * newdata)
{
GstMiniObject *olddata_val;
g_return_val_if_fail (olddata != NULL, FALSE);
GST_CAT_TRACE (GST_CAT_REFCOUNTING, "replace %p (%d) with %p (%d)",
*olddata, *olddata ? (*olddata)->refcount : 0,
newdata, newdata ? newdata->refcount : 0);
olddata_val = g_atomic_pointer_get ((gpointer *) olddata);
if (G_UNLIKELY (olddata_val == newdata))
return FALSE;
if (newdata)
gst_mini_object_ref (newdata);
while (G_UNLIKELY (!g_atomic_pointer_compare_and_exchange ((gpointer *)
olddata, olddata_val, newdata))) {
olddata_val = g_atomic_pointer_get ((gpointer *) olddata);
if (G_UNLIKELY (olddata_val == newdata))
break;
}
if (olddata_val)
gst_mini_object_unref (olddata_val);
return olddata_val != newdata;
}
static VkBool32
_gst_vk_debug_callback (VkDebugReportFlagsEXT msgFlags,
VkDebugReportObjectTypeEXT objType, uint64_t srcObject, size_t location,
int32_t msgCode, const char *pLayerPrefix, const char *pMsg,
void *pUserData)
{
if (msgFlags & VK_DEBUG_REPORT_ERROR_BIT_EXT) {
GST_CAT_ERROR (GST_VULKAN_DEBUG_CAT, "[%s] Code %d : %s", pLayerPrefix,
msgCode, pMsg);
} else if (msgFlags & VK_DEBUG_REPORT_WARNING_BIT_EXT) {
GST_CAT_WARNING (GST_VULKAN_DEBUG_CAT, "[%s] Code %d : %s", pLayerPrefix,
msgCode, pMsg);
} else if (msgFlags & VK_DEBUG_REPORT_INFORMATION_BIT_EXT) {
GST_CAT_LOG (GST_VULKAN_DEBUG_CAT, "[%s] Code %d : %s", pLayerPrefix,
msgCode, pMsg);
} else if (msgFlags & VK_DEBUG_REPORT_PERFORMANCE_WARNING_BIT_EXT) {
GST_CAT_FIXME (GST_VULKAN_DEBUG_CAT, "[%s] Code %d : %s", pLayerPrefix,
msgCode, pMsg);
} else if (msgFlags & VK_DEBUG_REPORT_DEBUG_BIT_EXT) {
GST_CAT_TRACE (GST_VULKAN_DEBUG_CAT, "[%s] Code %d : %s", pLayerPrefix,
msgCode, pMsg);
} else {
return FALSE;
}
/*
* false indicates that layer should not bail-out of an
* API call that had validation failures. This may mean that the
* app dies inside the driver due to invalid parameter(s).
* That's what would happen without validation layers, so we'll
* keep that behavior here.
*/
return FALSE;
}
static void
_mem_free (GstAllocator * allocator, GstMemory * memory)
{
GstGLBaseMemory *mem = (GstGLBaseMemory *) memory;
GST_CAT_TRACE (GST_CAT_GL_BASE_MEMORY, "freeing buffer memory:%p", mem);
gst_gl_context_thread_add (mem->context,
(GstGLContextThreadFunc) _destroy_gl_objects, mem);
g_mutex_clear (&mem->lock);
if (mem->alloc_data) {
g_free (mem->alloc_data);
mem->alloc_data = NULL;
}
mem->data = NULL;
if (mem->notify)
mem->notify (mem->user_data);
gst_object_unref (mem->context);
g_free (memory);
}
/**
* gst_mini_object_lock:
* @object: the mini-object to lock
* @flags: #GstLockFlags
*
* Lock the mini-object with the specified access mode in @flags.
*
* Returns: %TRUE if @object could be locked.
*/
gboolean
gst_mini_object_lock (GstMiniObject * object, GstLockFlags flags)
{
gint access_mode, state, newstate;
g_return_val_if_fail (object != NULL, FALSE);
g_return_val_if_fail (GST_MINI_OBJECT_IS_LOCKABLE (object), FALSE);
if (G_UNLIKELY (object->flags & GST_MINI_OBJECT_FLAG_LOCK_READONLY &&
flags & GST_LOCK_FLAG_WRITE))
return FALSE;
do {
access_mode = flags & FLAG_MASK;
newstate = state = g_atomic_int_get (&object->lockstate);
GST_CAT_TRACE (GST_CAT_LOCKING, "lock %p: state %08x, access_mode %d",
object, state, access_mode);
if (access_mode & GST_LOCK_FLAG_EXCLUSIVE) {
/* shared ref */
newstate += SHARE_ONE;
access_mode &= ~GST_LOCK_FLAG_EXCLUSIVE;
}
/* shared counter > 1 and write access is not allowed */
if (((state & GST_LOCK_FLAG_WRITE) != 0
|| (access_mode & GST_LOCK_FLAG_WRITE) != 0)
&& IS_SHARED (newstate))
goto lock_failed;
if (access_mode) {
if ((state & LOCK_FLAG_MASK) == 0) {
/* nothing mapped, set access_mode */
newstate |= access_mode;
} else {
/* access_mode must match */
if ((state & access_mode) != access_mode)
goto lock_failed;
}
/* increase refcount */
newstate += LOCK_ONE;
}
} while (!g_atomic_int_compare_and_exchange (&object->lockstate, state,
newstate));
return TRUE;
lock_failed:
{
GST_CAT_DEBUG (GST_CAT_LOCKING,
"lock failed %p: state %08x, access_mode %d", object, state,
access_mode);
return FALSE;
}
}
static void
_download_transfer (GstGLContext * context, GstGLMemoryPBO * gl_mem)
{
GstGLBaseMemory *mem = (GstGLBaseMemory *) gl_mem;
g_mutex_lock (&mem->lock);
if (_read_pixels_to_pbo (gl_mem))
GST_CAT_TRACE (GST_CAT_GL_MEMORY, "optimistic download of texture %u "
"using pbo %u", gl_mem->mem.tex_id, gl_mem->pbo->id);
g_mutex_unlock (&mem->lock);
}
static void
_download_transfer (GstGLContext * context, GstGLMemoryPBO * gl_mem)
{
GstGLBaseMemory *mem = (GstGLBaseMemory *) gl_mem;
g_mutex_lock (&mem->lock);
if (_read_pixels_to_pbo (gl_mem)) {
GST_CAT_TRACE (GST_CAT_GL_MEMORY, "optimistic download of texture %u "
"using pbo %u", gl_mem->mem.tex_id, gl_mem->pbo->id);
GST_MEMORY_FLAG_UNSET (gl_mem, GST_GL_BASE_MEMORY_TRANSFER_NEED_DOWNLOAD);
}
g_mutex_unlock (&mem->lock);
}
/**
* gst_buffer_copy_metadata:
* @dest: a destination #GstBuffer
* @src: a source #GstBuffer
* @flags: flags indicating what metadata fields should be copied.
*
* Copies the metadata from @src into @dest. The data, size and mallocdata
* fields are not copied.
*
* @flags indicate which fields will be copied. Use #GST_BUFFER_COPY_ALL to copy
* all the metadata fields.
*
* This function is typically called from a custom buffer copy function after
* creating @dest and setting the data, size, mallocdata.
*
* Since: 0.10.13
*/
void
gst_buffer_copy_metadata (GstBuffer * dest, const GstBuffer * src,
GstBufferCopyFlags flags)
{
g_return_if_fail (dest != NULL);
g_return_if_fail (src != NULL);
/* nothing to copy if the buffers are the same */
if (G_UNLIKELY (dest == src))
return;
#if GST_VERSION_NANO == 1
/* we enable this extra debugging in git versions only for now */
g_warn_if_fail (gst_buffer_is_metadata_writable (dest));
#endif
GST_CAT_LOG (GST_CAT_BUFFER, "copy %p to %p", src, dest);
if (flags & GST_BUFFER_COPY_FLAGS) {
guint mask;
/* copy relevant flags */
mask = GST_BUFFER_FLAG_PREROLL | GST_BUFFER_FLAG_IN_CAPS |
GST_BUFFER_FLAG_DELTA_UNIT | GST_BUFFER_FLAG_DISCONT |
GST_BUFFER_FLAG_GAP | GST_BUFFER_FLAG_MEDIA1 |
GST_BUFFER_FLAG_MEDIA2 | GST_BUFFER_FLAG_MEDIA3;
GST_MINI_OBJECT_FLAGS (dest) |= GST_MINI_OBJECT_FLAGS (src) & mask;
}
if (flags & GST_BUFFER_COPY_TIMESTAMPS) {
GST_BUFFER_TIMESTAMP (dest) = GST_BUFFER_TIMESTAMP (src);
GST_BUFFER_DURATION (dest) = GST_BUFFER_DURATION (src);
GST_BUFFER_OFFSET (dest) = GST_BUFFER_OFFSET (src);
GST_BUFFER_OFFSET_END (dest) = GST_BUFFER_OFFSET_END (src);
}
if (flags & GST_BUFFER_COPY_CAPS) {
gst_caps_replace (&GST_BUFFER_CAPS (dest), GST_BUFFER_CAPS (src));
}
if ((flags & GST_BUFFER_COPY_QDATA)) {
GST_CAT_TRACE (GST_CAT_BUFFER, "copying qdata from %p to %p", src, dest);
gst_buffer_copy_qdata (dest, src);
}
}
/**
* gst_mini_object_ref:
* @mini_object: the mini-object
*
* Increase the reference count of the mini-object.
*
* Note that the refcount affects the writability
* of @mini-object, see gst_mini_object_is_writable(). It is
* important to note that keeping additional references to
* GstMiniObject instances can potentially increase the number
* of memcpy operations in a pipeline, especially if the miniobject
* is a #GstBuffer.
*
* Returns: (transfer full): the mini-object.
*/
GstMiniObject *
gst_mini_object_ref (GstMiniObject * mini_object)
{
g_return_val_if_fail (mini_object != NULL, NULL);
/* we can't assert that the refcount > 0 since the _free functions
* increments the refcount from 0 to 1 again to allow resurecting
* the object
g_return_val_if_fail (mini_object->refcount > 0, NULL);
*/
GST_CAT_TRACE (GST_CAT_REFCOUNTING, "%p ref %d->%d", mini_object,
GST_MINI_OBJECT_REFCOUNT_VALUE (mini_object),
GST_MINI_OBJECT_REFCOUNT_VALUE (mini_object) + 1);
g_atomic_int_inc (&mini_object->refcount);
return mini_object;
}
static void
_vk_mem_free (GstAllocator * allocator, GstMemory * memory)
{
GstVulkanMemory *mem = (GstVulkanMemory *) memory;
GST_CAT_TRACE (GST_CAT_VULKAN_MEMORY, "freeing buffer memory:%p "
"id:%" G_GUINT64_FORMAT, mem, (guint64) mem->mem_ptr);
g_mutex_clear (&mem->lock);
if (mem->notify)
mem->notify (mem->user_data);
if (mem->mem_ptr && !mem->wrapped)
vkFreeMemory (mem->device->device, mem->mem_ptr, NULL);
gst_object_unref (mem->device);
}
/**
* gst_event_new_gap:
* @timestamp: the start time (pts) of the gap
* @duration: the duration of the gap
*
* Create a new GAP event. A gap event can be thought of as conceptually
* equivalent to a buffer to signal that there is no data for a certain
* amount of time. This is useful to signal a gap to downstream elements
* which may wait for data, such as muxers or mixers or overlays, especially
* for sparse streams such as subtitle streams.
*
* Returns: (transfer full): the new GAP event.
*/
GstEvent *
gst_event_new_gap (GstClockTime timestamp, GstClockTime duration)
{
GstEvent *event;
g_return_val_if_fail (GST_CLOCK_TIME_IS_VALID (timestamp), NULL);
GST_CAT_TRACE (GST_CAT_EVENT, "creating gap %" GST_TIME_FORMAT " - "
"%" GST_TIME_FORMAT " (duration: %" GST_TIME_FORMAT ")",
GST_TIME_ARGS (timestamp), GST_TIME_ARGS (timestamp + duration),
GST_TIME_ARGS (duration));
event = gst_event_new_custom (GST_EVENT_GAP,
gst_structure_new_id (GST_QUARK (EVENT_GAP),
GST_QUARK (TIMESTAMP), GST_TYPE_CLOCK_TIME, timestamp,
GST_QUARK (DURATION), GST_TYPE_CLOCK_TIME, duration, NULL));
return event;
}
static gpointer
_pbo_download_transfer (GstGLMemoryPBO * gl_mem, GstMapInfo * info, gsize size)
{
GstMapInfo *pbo_info;
gl_mem->pbo->target = GL_PIXEL_PACK_BUFFER;
/* texture -> pbo */
if (info->flags & GST_MAP_READ
&& GST_MEMORY_FLAG_IS_SET (gl_mem,
GST_GL_BASE_MEMORY_TRANSFER_NEED_DOWNLOAD)) {
GstMapInfo info;
GST_CAT_TRACE (GST_CAT_GL_MEMORY,
"attempting download of texture %u " "using pbo %u", gl_mem->mem.tex_id,
gl_mem->pbo->id);
if (!gst_memory_map (GST_MEMORY_CAST (gl_mem->pbo), &info,
GST_MAP_WRITE | GST_MAP_GL)) {
GST_CAT_WARNING (GST_CAT_GL_MEMORY, "Failed to write to PBO");
return NULL;
}
if (!_read_pixels_to_pbo (gl_mem)) {
gst_memory_unmap (GST_MEMORY_CAST (gl_mem->pbo), &info);
return NULL;
}
gst_memory_unmap (GST_MEMORY_CAST (gl_mem->pbo), &info);
}
pbo_info = g_new0 (GstMapInfo, 1);
/* pbo -> data */
/* get a cpu accessible mapping from the pbo */
if (!gst_memory_map (GST_MEMORY_CAST (gl_mem->pbo), pbo_info, info->flags)) {
GST_CAT_ERROR (GST_CAT_GL_MEMORY, "Failed to map pbo");
g_free (pbo_info);
return NULL;
}
info->user_data[0] = pbo_info;
return pbo_info->data;
}
/**
* gst_mini_object_steal:
* @olddata: (inout) (transfer full): pointer to a pointer to a mini-object to
* be stolen
*
* Replace the current #GstMiniObject pointer to by @olddata with NULL and
* return the old value.
*
* Returns: the #GstMiniObject at @oldata
*/
GstMiniObject *
gst_mini_object_steal (GstMiniObject ** olddata)
{
GstMiniObject *olddata_val;
g_return_val_if_fail (olddata != NULL, NULL);
GST_CAT_TRACE (GST_CAT_REFCOUNTING, "steal %p (%d)",
*olddata, *olddata ? (*olddata)->refcount : 0);
do {
olddata_val = g_atomic_pointer_get ((gpointer *) olddata);
if (olddata_val == NULL)
break;
} while (G_UNLIKELY (!g_atomic_pointer_compare_and_exchange ((gpointer *)
olddata, olddata_val, NULL)));
return olddata_val;
}
static void
_mem_free (GstAllocator * allocator, GstMemory * memory)
{
GstGLBaseBuffer *mem = (GstGLBaseBuffer *) memory;
GST_CAT_TRACE (GST_CAT_GL_BASE_BUFFER, "freeing buffer memory:%p id:%u", mem,
mem->id);
gst_gl_context_thread_add (mem->context,
(GstGLContextThreadFunc) _destroy_gl_objects, mem);
g_mutex_clear (&mem->lock);
if (mem->alloc_data) {
g_free (mem->alloc_data);
mem->alloc_data = NULL;
}
mem->data = NULL;
gst_object_unref (mem->context);
}
/**
* gst_mini_object_unref:
* @mini_object: the mini-object
*
* Decreases the reference count of the mini-object, possibly freeing
* the mini-object.
*/
void
gst_mini_object_unref (GstMiniObject * mini_object)
{
g_return_if_fail (mini_object != NULL);
GST_CAT_TRACE (GST_CAT_REFCOUNTING, "%p unref %d->%d",
mini_object,
GST_MINI_OBJECT_REFCOUNT_VALUE (mini_object),
GST_MINI_OBJECT_REFCOUNT_VALUE (mini_object) - 1);
g_return_if_fail (mini_object->refcount > 0);
if (G_UNLIKELY (g_atomic_int_dec_and_test (&mini_object->refcount))) {
gboolean do_free;
if (mini_object->dispose)
do_free = mini_object->dispose (mini_object);
else
do_free = TRUE;
/* if the subclass recycled the object (and returned FALSE) we don't
* want to free the instance anymore */
if (G_LIKELY (do_free)) {
/* there should be no outstanding locks */
g_return_if_fail ((g_atomic_int_get (&mini_object->lockstate) & LOCK_MASK)
< 4);
if (mini_object->n_qdata) {
call_finalize_notify (mini_object);
g_free (mini_object->qdata);
}
#ifndef GST_DISABLE_TRACE
_gst_alloc_trace_free (_gst_mini_object_trace, mini_object);
#endif
if (mini_object->free)
mini_object->free (mini_object);
}
}
}
static void
gst_buffer_copy_qdata (GstBuffer * dest, const GstBuffer * src)
{
GstBufferPrivate *priv;
GQueue qdata_copy = G_QUEUE_INIT;
GList *l;
if (G_LIKELY (src->priv == NULL))
return;
for (l = src->priv->qdata; l != NULL; l = l->next) {
GstStructure *s = gst_structure_copy (l->data);
gst_structure_set_parent_refcount (s, &dest->mini_object.refcount);
g_queue_push_tail (&qdata_copy, s);
GST_CAT_TRACE (GST_CAT_BUFFER, "copying qdata '%s' from buffer %p to %p",
g_quark_to_string (s->name), src, dest);
}
priv = gst_buffer_ensure_priv (dest);
priv->qdata = qdata_copy.head;
}
static void
_mem_create_gl (GstGLContext * context, struct create_data *transfer)
{
GstGLBaseMemoryAllocatorClass *alloc_class;
GError *error = NULL;
GST_CAT_TRACE (GST_CAT_GL_BASE_MEMORY, "Create memory %p", transfer->mem);
alloc_class =
GST_GL_BASE_MEMORY_ALLOCATOR_GET_CLASS (transfer->mem->mem.allocator);
g_return_if_fail (alloc_class->create != NULL);
transfer->mem->query = gst_gl_query_new (context, GST_GL_QUERY_TIME_ELAPSED);
if ((transfer->result = alloc_class->create (transfer->mem, &error)))
return;
g_assert (error != NULL);
GST_CAT_ERROR (GST_CAT_GL_BASE_MEMORY, "Failed to create GL buffer: %s",
error->message);
g_clear_error (&error);
}
