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ffmpegcolorspace: Optimize transform_caps()

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If the second and next caps structures are a subset of the already existing
transformed caps we can safely skip them because we would transform them to
the same caps again.
This commit is contained in:
Sebastian Dröge 2011-05-27 14:28:46 +02:00
parent a2162b07ad
commit da4e79bb6b
1 changed files with 12 additions and 10 deletions
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22
gst/ffmpegcolorspace/gstffmpegcolorspace.c
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@ -101,13 +101,20 @@ gst_ffmpegcsp_caps_remove_format_info (GstCaps * caps)
{
GstStructure *yuvst, *rgbst, *grayst;
gint i, n;
GstCaps *res;
caps = gst_caps_copy (caps);
res = gst_caps_new_empty ();
n = gst_caps_get_size (caps);
for (i = 0; i < n; i++) {
yuvst = 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, yuvst))
continue;
yuvst = gst_structure_copy (yuvst);
gst_structure_set_name (yuvst, "video/x-raw-yuv");
gst_structure_remove_fields (yuvst, "format", "endianness", "depth",
"bpp", "red_mask", "green_mask", "blue_mask", "alpha_mask",
@ -120,11 +127,12 @@ gst_ffmpegcsp_caps_remove_format_info (GstCaps * caps)
grayst = gst_structure_copy (rgbst);
gst_structure_set_name (grayst, "video/x-raw-gray");
gst_caps_merge_structure (caps, rgbst);
gst_caps_merge_structure (caps, grayst);
gst_caps_append_structure (res, yuvst);
gst_caps_append_structure (res, rgbst);
gst_caps_append_structure (res, grayst);
}
return caps;
return res;
}
/* The caps can be transformed into any other caps with format info removed.
@ -134,17 +142,11 @@ static GstCaps *
gst_ffmpegcsp_transform_caps (GstBaseTransform * btrans,
GstPadDirection direction, GstCaps * caps, GstCaps * filter)
{
GstCaps *template;
GstCaps *tmp, *tmp2;
GstCaps *result;
template = gst_static_pad_template_get_caps (&gst_ffmpegcsp_src_template);
/* Get all possible caps that we can transform to */
tmp = gst_ffmpegcsp_caps_remove_format_info (caps);
tmp2 = gst_caps_intersect_full (tmp, template, GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (tmp);
tmp = tmp2;
if (filter) {
tmp2 = gst_caps_intersect_full (filter, tmp, GST_CAPS_INTERSECT_FIRST);