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v4l2bufferpool: Copy flags and timestamp when importing

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Whenever we import from downstream pool (userptr or dmabuf-import), we
should copy over the flags and timestamp, otherwise downstream will not
get proper synchronization or will not be able to notice frames that has
corruption in it.

https://bugzilla.gnome.org/show_bug.cgi?id=785680
This commit is contained in:
Nicolas Dufresne 2017-08-01 09:22:43 -04:00
parent 2c7dfff047
commit ba8aa440bb
1 changed files with 13 additions and 1 deletions
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14
sys/v4l2/gstv4l2bufferpool.c
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@ -1823,12 +1823,20 @@ gst_v4l2_buffer_pool_process (GstV4l2BufferPool * pool, GstBuffer ** buf)
case GST_V4L2_IO_USERPTR:
{
struct UserPtrData *data;
GstBuffer *tmp;
/* Replace our buffer with downstream allocated buffer */
data = gst_mini_object_steal_qdata (GST_MINI_OBJECT (*buf),
GST_V4L2_IMPORT_QUARK);
gst_buffer_replace (buf, data->buffer);
tmp = gst_buffer_ref (data->buffer);
_unmap_userptr_frame (data);
/* Now tmp is writable, copy the flags and timestamp */
gst_buffer_copy_into (tmp, *buf,
GST_BUFFER_COPY_FLAGS | GST_BUFFER_COPY_TIMESTAMPS, 0, -1);
gst_buffer_replace (buf, tmp);
gst_buffer_unref (tmp);
break;
}
@ -1839,6 +1847,10 @@ gst_v4l2_buffer_pool_process (GstV4l2BufferPool * pool, GstBuffer ** buf)
/* Replace our buffer with downstream allocated buffer */
tmp = gst_mini_object_steal_qdata (GST_MINI_OBJECT (*buf),
GST_V4L2_IMPORT_QUARK);
gst_buffer_copy_into (tmp, *buf,
GST_BUFFER_COPY_FLAGS | GST_BUFFER_COPY_TIMESTAMPS, 0, -1);
gst_buffer_replace (buf, tmp);
gst_buffer_unref (tmp);
break;