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audioconvert: refactor format removal.

Browse source 
remove_format_info was a bit confusing to read, this removes
it in favor of standard gst_caps_map_in_place calls.

This no longer simplifies the resulting caps, but I
consider this should be the job of basetransform.

https://bugzilla.gnome.org/show_bug.cgi?id=785471
This commit is contained in:
Mathieu Duponchelle 2017-08-15 00:20:40 +02:00
parent fc86194595
commit 7a407b69e1
1 changed files with 24 additions and 43 deletions
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67
gst/audioconvert/gstaudioconvert.c
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@ -239,49 +239,29 @@ parse_error:
}
}
/* copies the given caps */
static GstCaps *
gst_audio_convert_caps_remove_format_info (GstCaps * caps, gboolean channels)
static gboolean
remove_format_from_structure (GstCapsFeatures * features,
GstStructure * structure, gpointer user_data G_GNUC_UNUSED)
{
GstStructure *st;
gint i, n, n_channels;
GstCaps *res;
guint64 channel_mask;
gst_structure_remove_field (structure, "format");
return TRUE;
}
res = gst_caps_new_empty ();
static gboolean
remove_channels_from_structure (GstCapsFeatures * features, GstStructure * s,
gpointer user_data G_GNUC_UNUSED)
{
guint64 mask;
gint channels;
n = gst_caps_get_size (caps);
for (i = 0; i < n; i++) {
gboolean remove_channels = FALSE;
st = gst_caps_get_structure (caps, i);
/* If this is already expressed by the existing caps
* skip this structure */
if (i > 0 && gst_caps_is_subset_structure (res, st))
continue;
st = gst_structure_copy (st);
gst_structure_remove_field (st, "format");
/* Only remove the channels and channel-mask for non-NONE layouts */
if (gst_structure_get (st, "channel-mask", GST_TYPE_BITMASK, &channel_mask,
NULL)) {
if (channel_mask != 0
|| (gst_structure_get_int (st, "channels", &n_channels)
&& (n_channels == 1)))
remove_channels = TRUE;
} else {
remove_channels = TRUE;
}
if (remove_channels && channels)
gst_structure_remove_fields (st, "channel-mask", "channels", NULL);
gst_caps_append_structure (res, st);
/* Only remove the channels and channel-mask for non-NONE layouts */
if (!gst_structure_get (s, "channel-mask", GST_TYPE_BITMASK, &mask, NULL) ||
(mask != 0 || (gst_structure_get_int (s, "channels", &channels)
&& channels == 1))) {
gst_structure_remove_fields (s, "channel-mask", "channels", NULL);
}
return res;
return TRUE;
}
/* The caps can be transformed into any other caps with format info removed.
@ -294,8 +274,10 @@ gst_audio_convert_transform_caps (GstBaseTransform * btrans,
GstCaps *tmp, *tmp2;
GstCaps *result;
/* Get all possible caps that we can transform to */
tmp = gst_audio_convert_caps_remove_format_info (caps, TRUE);
tmp = gst_caps_copy (caps);
gst_caps_map_in_place (tmp, remove_format_from_structure, NULL);
gst_caps_map_in_place (tmp, remove_channels_from_structure, NULL);
if (filter) {
tmp2 = gst_caps_intersect_full (filter, tmp, GST_CAPS_INTERSECT_FIRST);
@ -610,12 +592,11 @@ gst_audio_convert_fixate_caps (GstBaseTransform * base,
result = gst_caps_intersect (othercaps, caps);
if (gst_caps_is_empty (result)) {
GstCaps *removed;
GstCaps *removed = gst_caps_copy (caps);
if (result)
gst_caps_unref (result);
/* try to preserve channels */
removed = gst_audio_convert_caps_remove_format_info (caps, FALSE);
gst_caps_map_in_place (removed, remove_format_from_structure, NULL);
result = gst_caps_intersect (othercaps, removed);
gst_caps_unref (removed);
if (gst_caps_is_empty (result)) {