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matroska-mux: Handle multiview-mode/flags caps fields correctly when checking caps equality

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Not having these fields is equivalent with them being mono/0 so consider
them like that. The generic caps functions are not aware of these
semantics and would consider the caps different, causing a negotiation
failure when caps are changing from caps with to caps without or the
other way around.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1826>
This commit is contained in:
Sebastian Dröge 2022-03-01 20:56:43 +02:00 committed by GStreamer Marge Bot
parent 303d2a9ab7
commit 1b851ae23f
1 changed files with 29 additions and 10 deletions
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39
subprojects/gst-plugins-good/gst/matroska/matroska-mux.c
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@ -1018,13 +1018,32 @@ check_field (GQuark field_id, const GValue * value, gpointer user_data)
return FALSE;
else if (field_id == g_quark_from_static_string ("bit-depth-luma"))
return FALSE;
/* Remove multiview-mode=mono and multiview-flags=0 fields as those are
* equivalent with not having the fields but are not considered equivalent
* by the generic caps functions.
*/
if (field_id == g_quark_from_static_string ("multiview-mode")) {
const gchar *s = g_value_get_string (value);
if (g_strcmp0 (s, "mono") == 0)
return FALSE;
}
if (field_id == g_quark_from_static_string ("multiview-flags")) {
guint multiview_flags = gst_value_get_flagset_flags (value);
if (multiview_flags == 0)
return FALSE;
}
}
return TRUE;
}
static gboolean
check_new_caps (GstCaps * old_caps, GstCaps * new_caps)
check_new_caps (GstMatroskaTrackVideoContext * videocontext, GstCaps * old_caps,
GstCaps * new_caps)
{
GstStructure *old_s, *new_s;
gboolean ret;
@ -1076,9 +1095,17 @@ gst_matroska_mux_video_pad_setcaps (GstPad * pad, GstCaps * caps)
mux = GST_MATROSKA_MUX (GST_PAD_PARENT (pad));
/* find context */
collect_pad = (GstMatroskaPad *) gst_pad_get_element_private (pad);
g_assert (collect_pad);
context = collect_pad->track;
g_assert (context);
g_assert (context->type == GST_MATROSKA_TRACK_TYPE_VIDEO);
videocontext = (GstMatroskaTrackVideoContext *) context;
if ((old_caps = gst_pad_get_current_caps (pad))) {
if (mux->state >= GST_MATROSKA_MUX_STATE_HEADER
&& !check_new_caps (old_caps, caps)) {
&& !check_new_caps (videocontext, old_caps, caps)) {
GST_ELEMENT_ERROR (mux, STREAM, MUX, (NULL),
("Caps changes are not supported by Matroska\nCurrent: `%"
GST_PTR_FORMAT "`\nNew: `%" GST_PTR_FORMAT "`", old_caps, caps));
@ -1093,14 +1120,6 @@ gst_matroska_mux_video_pad_setcaps (GstPad * pad, GstCaps * caps)
goto refuse_caps;
}
/* find context */
collect_pad = (GstMatroskaPad *) gst_pad_get_element_private (pad);
g_assert (collect_pad);
context = collect_pad->track;
g_assert (context);
g_assert (context->type == GST_MATROSKA_TRACK_TYPE_VIDEO);
videocontext = (GstMatroskaTrackVideoContext *) context;
/* gst -> matroska ID'ing */
structure = gst_caps_get_structure (caps, 0);