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glfilter: add parent meta to output buffer for input buffer

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glfilter will unref input buffer after _transform() call immidiately,
but gpu may still reading input buffer for rendering because gl
api is executed async. Need hold reference for input buffer by
adding parent meta to output buffer.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4846>
This commit is contained in:
Haihua Hu 2023-06-13 10:30:16 +08:00 committed by Tim-Philipp Müller
parent b226b62ae3
commit 4ab685c2a3
1 changed files with 8 additions and 0 deletions
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8
subprojects/gst-plugins-base/gst-libs/gst/gl/gstglfilter.c
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@ -1032,6 +1032,14 @@ gst_gl_filter_transform (GstBaseTransform * bt, GstBuffer * inbuf,
if (out_sync_meta)
gst_gl_sync_meta_set_sync_point (out_sync_meta, context);
/* since gl api is async operation, when return from transform()
* function, basetransform will unref input buffer immidiately,
* but gpu may still reading input buffer for rendering. Add parent
* buffer meta to hold one reference of inbuf, this can avoid this
* buffer sync problem.
*/
gst_buffer_add_parent_buffer_meta (outbuf, inbuf);
return ret ? GST_FLOW_OK : GST_FLOW_ERROR;
}