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plugin: simplify caps feature selection

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This patch simplifies the function gst_vaapi_find_preferred_caps_feature().

Instead of intersecting custom caps to find the preferred feature, the peer
caps are traversed in order to find the preferred feature, according to an
ordered feature priority list.

In the case of GLTextureUploadMeta, the colour format is computed using
GstVideoInfo of the selected fixed caps.

https://bugzilla.gnome.org/show_bug.cgi?id=765223
This commit is contained in:
Víctor Manuel Jáquez Leal 2016-03-28 19:26:02 +02:00
parent 8c26070151
commit ce6275020e
1 changed files with 27 additions and 64 deletions
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91
gst/vaapi/gstvaapipluginutil.c
View file

@ -432,55 +432,30 @@ gst_vaapi_video_format_new_template_caps_with_features (GstVideoFormat format,
return caps;
}
static GstCaps *
new_gl_texture_upload_meta_caps (void)
{
return
gst_caps_from_string (GST_VIDEO_CAPS_MAKE_WITH_FEATURES
(GST_CAPS_FEATURE_META_GST_VIDEO_GL_TEXTURE_UPLOAD_META,
"{ RGBA, BGRA }"));
}
GstVaapiCapsFeature
gst_vaapi_find_preferred_caps_feature (GstPad * pad, GstVideoFormat format,
GstVideoFormat * out_format_ptr)
{
GstVaapiCapsFeature feature = GST_VAAPI_CAPS_FEATURE_SYSTEM_MEMORY;
guint i, num_structures;
GstVaapiCapsFeature feature = GST_VAAPI_CAPS_FEATURE_NOT_NEGOTIATED;
guint i, j, num_structures;
GstCaps *caps = NULL;
GstCaps *gl_texture_upload_caps = NULL;
GstCaps *sysmem_caps = NULL;
GstCaps *vaapi_caps = NULL;
GstCaps *out_caps, *templ;
GstVideoFormat out_format;
static const guint feature_list[] = { GST_VAAPI_CAPS_FEATURE_VAAPI_SURFACE,
GST_VAAPI_CAPS_FEATURE_GL_TEXTURE_UPLOAD_META,
GST_VAAPI_CAPS_FEATURE_SYSTEM_MEMORY,
};
templ = gst_pad_get_pad_template_caps (pad);
out_caps = gst_pad_peer_query_caps (pad, templ);
gst_caps_unref (templ);
if (!out_caps) {
feature = GST_VAAPI_CAPS_FEATURE_NOT_NEGOTIATED;
if (!out_caps)
goto cleanup;
}
out_format = format == GST_VIDEO_FORMAT_ENCODED ?
GST_VIDEO_FORMAT_NV12 : format;
gl_texture_upload_caps = new_gl_texture_upload_meta_caps ();
if (!gl_texture_upload_caps)
goto cleanup;
vaapi_caps =
gst_vaapi_video_format_new_template_caps_with_features (out_format,
GST_CAPS_FEATURE_MEMORY_VAAPI_SURFACE);
if (!vaapi_caps)
goto cleanup;
sysmem_caps =
gst_vaapi_video_format_new_template_caps_with_features (out_format,
GST_CAPS_FEATURE_MEMORY_SYSTEM_MEMORY);
if (!sysmem_caps)
goto cleanup;
feature = GST_VAAPI_CAPS_FEATURE_SYSTEM_MEMORY;
num_structures = gst_caps_get_size (out_caps);
for (i = 0; i < num_structures; i++) {
GstCapsFeatures *const features = gst_caps_get_features (out_caps, i);
@ -490,21 +465,19 @@ gst_vaapi_find_preferred_caps_feature (GstPad * pad, GstVideoFormat format,
if (gst_caps_features_is_any (features))
continue;
gst_caps_replace (&caps, NULL);
caps = gst_caps_new_full (gst_structure_copy (structure), NULL);
if (!caps)
continue;
gst_caps_set_features (caps, 0, gst_caps_features_copy (features));
if (gst_caps_can_intersect (caps, vaapi_caps) &&
feature < GST_VAAPI_CAPS_FEATURE_VAAPI_SURFACE)
feature = GST_VAAPI_CAPS_FEATURE_VAAPI_SURFACE;
else if (gst_caps_can_intersect (caps, gl_texture_upload_caps) &&
feature < GST_VAAPI_CAPS_FEATURE_GL_TEXTURE_UPLOAD_META)
feature = GST_VAAPI_CAPS_FEATURE_GL_TEXTURE_UPLOAD_META;
else if (gst_caps_can_intersect (caps, sysmem_caps) &&
feature < GST_VAAPI_CAPS_FEATURE_SYSTEM_MEMORY)
feature = GST_VAAPI_CAPS_FEATURE_SYSTEM_MEMORY;
gst_caps_replace (&caps, NULL);
for (j = 0; j < G_N_ELEMENTS (feature_list); j++) {
if (gst_vaapi_caps_feature_contains (caps, feature_list[j])
&& feature < feature_list[j]) {
feature = feature_list[j];
break;
}
}
/* Stop at the first match, the caps should already be sorted out
by preference order from downstream elements */
@ -512,35 +485,25 @@ gst_vaapi_find_preferred_caps_feature (GstPad * pad, GstVideoFormat format,
break;
}
if (!caps)
goto cleanup;
if (out_format_ptr) {
if (feature == GST_VAAPI_CAPS_FEATURE_GL_TEXTURE_UPLOAD_META) {
GstStructure *structure;
gchar *format_str;
out_format = GST_VIDEO_FORMAT_UNKNOWN;
do {
caps = gst_caps_intersect_full (out_caps, gl_texture_upload_caps,
GST_CAPS_INTERSECT_FIRST);
if (!caps)
break;
structure = gst_caps_get_structure (caps, 0);
if (!structure)
break;
if (!gst_structure_get (structure, "format", G_TYPE_STRING,
&format_str, NULL))
break;
out_format = gst_video_format_from_string (format_str);
g_free (format_str);
} while (0);
if (!out_format)
GstVideoInfo vinfo;
if (!gst_caps_is_fixed (caps))
caps = gst_caps_fixate (caps);
gst_video_info_from_caps (&vinfo, caps);
out_format = GST_VIDEO_INFO_FORMAT (&vinfo);
if (out_format == GST_VIDEO_FORMAT_UNKNOWN)
goto cleanup;
}
*out_format_ptr = out_format;
}
cleanup:
gst_caps_replace (&gl_texture_upload_caps, NULL);
gst_caps_replace (&sysmem_caps, NULL);
gst_caps_replace (&vaapi_caps, NULL);
gst_caps_replace (&caps, NULL);
gst_caps_replace (&out_caps, NULL);
return feature;