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v4l2src: preserve features when fixating caps

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The caps features were lost when sorting caps structures in
gst_v4l2src_fixate(). This was breaking alternate as
GST_CAPS_FEATURE_FORMAT_INTERLACED was removed from the caps.
This commit is contained in:
Guillaume Desmottes 2019-01-24 11:54:49 +01:00 committed by Nicolas Dufresne
parent 74e3eb1f1d
commit e3c4b80750
1 changed files with 17 additions and 8 deletions
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25
sys/v4l2/gstv4l2src.c
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@ -308,13 +308,17 @@ gst_v4l2_src_parse_fixed_struct (GstStructure * s,
/* TODO Consider framerate */
static gint
gst_v4l2src_fixed_caps_compare (GstStructure * a, GstStructure * b,
gst_v4l2src_fixed_caps_compare (GstCaps * caps_a, GstCaps * caps_b,
struct PreferedCapsInfo *pref)
{
GstStructure *a, *b;
gint aw = G_MAXINT, ah = G_MAXINT, ad = G_MAXINT;
gint bw = G_MAXINT, bh = G_MAXINT, bd = G_MAXINT;
gint ret;
a = gst_caps_get_structure (caps_a, 0);
b = gst_caps_get_structure (caps_b, 0);
gst_v4l2_src_parse_fixed_struct (a, &aw, &ah, NULL, NULL);
gst_v4l2_src_parse_fixed_struct (b, &bw, &bh, NULL, NULL);
@ -402,8 +406,6 @@ gst_v4l2src_fixate (GstBaseSrc * basesrc, GstCaps * caps, GstStructure * pref_s)
GST_DEBUG_OBJECT (basesrc, "fixating caps %" GST_PTR_FORMAT, caps);
caps = gst_caps_make_writable (caps);
/* We consider the first structure from peercaps to be a preference. This is
* useful for matching a reported native display, or simply to avoid
* transformation to happen downstream. */
@ -418,17 +420,24 @@ gst_v4l2src_fixate (GstBaseSrc * basesrc, GstCaps * caps, GstStructure * pref_s)
GST_DEBUG_OBJECT (basesrc, "Prefered size %ix%i", pref.width, pref.height);
/* Sort the structures to get the caps that is nearest to our preferences,
* first */
while ((s = gst_caps_steal_structure (caps, 0))) {
* first. Use single struct caps for sorting so we preserve the features. */
for (i = 0; i < gst_caps_get_size (caps); i++) {
GstCaps *tmp = gst_caps_copy_nth (caps, i);
s = gst_caps_get_structure (tmp, 0);
gst_v4l2_src_fixate_struct_with_preference (s, &pref);
caps_list = g_list_insert_sorted_with_data (caps_list, s,
caps_list = g_list_insert_sorted_with_data (caps_list, tmp,
(GCompareDataFunc) gst_v4l2src_fixed_caps_compare, &pref);
}
gst_caps_unref (caps);
caps = gst_caps_new_empty ();
while (caps_list) {
s = caps_list->data;
GstCaps *tmp = caps_list->data;
caps_list = g_list_delete_link (caps_list, caps_list);
gst_caps_append_structure (caps, s);
gst_caps_append (caps, tmp);
}
GST_DEBUG_OBJECT (basesrc, "sorted and normalized caps %" GST_PTR_FORMAT,