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videorate: Fixate color-matrix and chroma-site fields if necessary

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This commit is contained in:
Sebastian Dröge 2010-05-22 09:48:01 +02:00
parent 220a61f821
commit b1a9af61c7
1 changed files with 43 additions and 0 deletions
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43
gst/videorate/gstvideorate.c
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@ -268,6 +268,45 @@ gst_video_rate_getcaps (GstPad * pad)
return caps;
}
static gboolean
_gst_structure_fixate_field_string (GstStructure * structure,
const char *field_name, const gchar * target)
{
const GValue *value;
value = gst_structure_get_value (structure, field_name);
if (G_VALUE_TYPE (value) == G_TYPE_STRING) {
/* already fixed */
return FALSE;
} else if (G_VALUE_TYPE (value) == GST_TYPE_LIST) {
const GValue *list_value;
int i, n;
const gchar *best = NULL;
int best_index = -1;
n = gst_value_list_get_size (value);
for (i = 0; i < n; i++) {
list_value = gst_value_list_get_value (value, i);
if (G_VALUE_TYPE (list_value) == G_TYPE_STRING) {
const gchar *x = g_value_get_string (list_value);
if (best_index == -1 || g_str_equal (x, target)) {
best_index = i;
best = x;
}
}
}
if (best_index != -1) {
gst_structure_set (structure, field_name, G_TYPE_STRING, best, NULL);
return TRUE;
}
return FALSE;
}
return FALSE;
}
static gboolean
gst_video_rate_setcaps (GstPad * pad, GstCaps * caps)
{
@ -348,6 +387,10 @@ gst_video_rate_setcaps (GstPad * pad, GstCaps * caps)
if (gst_structure_has_field (structure, "interlaced"))
gst_structure_fixate_field_boolean (structure, "interlaced", FALSE);
if (gst_structure_has_field (structure, "color-matrix"))
_gst_structure_fixate_field_string (structure, "color-matrix", "sdtv");
if (gst_structure_has_field (structure, "chroma-site"))
_gst_structure_fixate_field_string (structure, "chroma-site", "mpeg2");
gst_pad_set_caps (otherpad, caps);
gst_caps_unref (caps);