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playsink: Only use the sink's colorbalance interface if it supports at least brightness/contrast/hue/saturation

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This commit is contained in:
Sebastian Dröge 2012-02-22 14:53:39 +01:00
parent 8bcf96198e
commit 2c565f72df
1 changed files with 48 additions and 5 deletions
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53
gst/playback/gstplaysink.c
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@ -1250,20 +1250,63 @@ link_failed:
}
}
static gboolean
is_valid_color_balance_element (GstElement * element)
{
GstColorBalance *bal = GST_COLOR_BALANCE (element);
gboolean have_brightness = FALSE;
gboolean have_contrast = FALSE;
gboolean have_hue = FALSE;
gboolean have_saturation = FALSE;
const GList *channels, *l;
channels = gst_color_balance_list_channels (bal);
for (l = channels; l; l = l->next) {
GstColorBalanceChannel *ch = l->data;
if (g_strrstr (ch->label, "BRIGHTNESS"))
have_brightness = TRUE;
else if (g_strrstr (ch->label, "CONTRAST"))
have_contrast = TRUE;
else if (g_strrstr (ch->label, "HUE"))
have_hue = TRUE;
else if (g_strrstr (ch->label, "SATURATION"))
have_saturation = TRUE;
}
return have_brightness && have_contrast && have_hue && have_saturation;
}
static void
iterate_color_balance_elements (gpointer data, gpointer user_data)
{
gboolean valid = is_valid_color_balance_element (data);
gboolean *valid_out = user_data;
*valid_out = *valid_out && valid;
gst_object_unref (data);
}
static gboolean
has_color_balance_element (GstElement * element)
{
GstElement *cb = NULL;
GstIterator *it;
gboolean valid = FALSE;
if (GST_IS_COLOR_BALANCE (element))
return TRUE;
return is_valid_color_balance_element (element);
else if (!GST_IS_BIN (element))
return FALSE;
cb = gst_bin_get_by_interface (GST_BIN (element), GST_TYPE_COLOR_BALANCE);
gst_object_unref (cb);
it = gst_bin_iterate_all_by_interface (GST_BIN (element),
GST_TYPE_COLOR_BALANCE);
while (gst_iterator_foreach (it, iterate_color_balance_elements,
&valid) == GST_ITERATOR_RESYNC)
gst_iterator_resync (it);
gst_iterator_free (it);
return (cb != NULL);
return valid;
}
/* make the element (bin) that contains the elements needed to perform