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va: vpp: global lock to handle shared buffers

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Add a global mutex to exclusive access to shared stream buffers, such
as DMABufs or VASurfaces after a tee:

LIBVA_DRIVER_NAME=iHD \
gst-launch-1.0 v4l2src ! tee name=t t. ! queue ! \
  vapostproc skin-tone=9 ! xvimagesink \
  t. ! queue ! vapostproc ! xvimagesink

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1529>
This commit is contained in:
Víctor Manuel Jáquez Leal 2020-09-19 14:26:42 +02:00
parent 9845ec68dc
commit 990d1bfbce
3 changed files with 24 additions and 9 deletions
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1
sys/va/gstvafilter.c
View file

@ -397,6 +397,7 @@ gst_va_filter_close (GstVaFilter * self)
GST_OBJECT_LOCK (self);
g_clear_pointer (&self->available_filters, g_array_unref);
g_clear_pointer (&self->filters, g_array_unref);
gst_va_filter_init (self);
GST_OBJECT_UNLOCK (self);

28
sys/va/gstvavpp.c
View file

@ -139,6 +139,8 @@ enum
VPP_CONVERT_FEATURE = 1 << 4,
};
extern GRecMutex GST_VA_SHARED_LOCK;
/* *INDENT-OFF* */
static const gchar *caps_str = GST_VIDEO_CAPS_MAKE_WITH_FEATURES ("memory:VAMemory",
"{ NV12, I420, YV12, YUY2, RGBA, BGRA, P010_10LE, ARGB, ABGR }") " ;"
@ -1004,6 +1006,18 @@ _get_sinkpad_pool (GstVaVpp * self)
return self->sinkpad_pool;
}
static gboolean
_try_import_buffer_unlocked (GstVaVpp * self, GstBuffer * inbuf)
{
VASurfaceID surface;
surface = gst_va_buffer_get_surface (inbuf, NULL);
if (surface != VA_INVALID_ID)
return TRUE;
return _try_import_dmabuf (self, inbuf);
}
static GstFlowReturn
gst_va_vpp_import_input_buffer (GstVaVpp * self, GstBuffer * inbuf,
GstBuffer ** buf)
@ -1012,16 +1026,12 @@ gst_va_vpp_import_input_buffer (GstVaVpp * self, GstBuffer * inbuf,
GstBufferPool *pool;
GstFlowReturn ret;
GstVideoFrame in_frame, out_frame;
VASurfaceID surface;
gboolean copied;
gboolean imported, copied;
surface = gst_va_buffer_get_surface (inbuf, NULL);
if (surface != VA_INVALID_ID) {
*buf = gst_buffer_ref (inbuf);
return GST_FLOW_OK;
}
if (_try_import_dmabuf (self, inbuf)) {
g_rec_mutex_lock (&GST_VA_SHARED_LOCK);
imported = _try_import_buffer_unlocked (self, inbuf);
g_rec_mutex_unlock (&GST_VA_SHARED_LOCK);
if (imported) {
*buf = gst_buffer_ref (inbuf);
return GST_FLOW_OK;
}

4
sys/va/plugin.c
View file

@ -36,6 +36,10 @@
#define GST_CAT_DEFAULT gstva_debug
GST_DEBUG_CATEGORY (gstva_debug);
/* big bad mutex to exclusive access to shared stream buffers, such as
* DMABuf after a tee */
GRecMutex GST_VA_SHARED_LOCK = { 0, };
static void
plugin_add_dependencies (GstPlugin * plugin)
{