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audioenc/dec: Preserve downstream caps preference in get caps

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This should fix pipelines such as this one to work as expected
  ... ! opusenc ! capsfilter caps='audio/x-opus,
  channels=1; audio/x-opus, channels=2' ! ...

The expectation is that the encoder will propose the first structure
before the second one to the source.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3673>
This commit is contained in:
Olivier Crête 2023-01-03 18:52:05 -05:00 committed by GStreamer Marge Bot
parent bd534af999
commit e03a10a0f2
1 changed files with 4 additions and 2 deletions
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6
subprojects/gst-plugins-base/gst-libs/gst/audio/gstaudioutilsprivate.c
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@ -128,13 +128,15 @@ __gst_audio_element_proxy_getcaps (GstElement * element, GstPad * sinkpad,
filter_caps = __gst_audio_element_proxy_caps (element, templ_caps, allowed);
fcaps = gst_caps_intersect (filter_caps, templ_caps);
fcaps = gst_caps_intersect_full (filter_caps, templ_caps,
GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (filter_caps);
gst_caps_unref (templ_caps);
if (filter) {
GST_LOG_OBJECT (element, "intersecting with %" GST_PTR_FORMAT, filter);
filter_caps = gst_caps_intersect (fcaps, filter);
filter_caps = gst_caps_intersect_full (fcaps, filter,
GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (fcaps);
fcaps = filter_caps;
}