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glfilter: Add transform_internal_caps() vfunc

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Add a vfunc that is called by glfilter before it sets
caps features and intersects with the peer caps, and
move removing the size from caps into its default
implementation. Allows sub-classes to do more
sophisticated management of the size fields in case they
don't support arbitrary resizing or have distinct
preferences.
This commit is contained in:
Jan Schmidt 2015-05-30 02:29:47 +10:00 committed by Tim-Philipp Müller
parent 697107fe7d
commit 5007311198
2 changed files with 26 additions and 5 deletions
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26
gst-libs/gst/gl/gstglfilter.c
View file

@ -72,6 +72,8 @@ static void gst_gl_filter_get_property (GObject * object, guint prop_id,
static GstCaps *gst_gl_filter_transform_caps (GstBaseTransform * bt,
GstPadDirection direction, GstCaps * caps, GstCaps * filter);
static GstCaps *default_transform_internal_caps (GstGLFilter * filter,
GstPadDirection direction, GstCaps * caps, GstCaps * filter_caps);
static GstCaps *gst_gl_filter_fixate_caps (GstBaseTransform * bt,
GstPadDirection direction, GstCaps * caps, GstCaps * othercaps);
static void gst_gl_filter_reset (GstGLFilter * filter);
@ -116,6 +118,8 @@ gst_gl_filter_class_init (GstGLFilterClass * klass)
GST_GL_BASE_FILTER_CLASS (klass)->gl_start = gst_gl_filter_gl_start;
GST_GL_BASE_FILTER_CLASS (klass)->gl_stop = gst_gl_filter_gl_stop;
klass->transform_internal_caps = default_transform_internal_caps;
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_gl_filter_src_pad_template));
gst_element_class_add_pad_template (element_class,
@ -625,16 +629,26 @@ gst_gl_filter_set_caps_features (const GstCaps * caps,
return ret;
}
static GstCaps *
default_transform_internal_caps (GstGLFilter * filter,
GstPadDirection direction, GstCaps * caps, GstCaps * filter_caps)
{
GstCaps *tmp = gst_gl_filter_caps_remove_size (caps);
GST_DEBUG_OBJECT (filter, "size removal returned caps %" GST_PTR_FORMAT, tmp);
return tmp;
}
static GstCaps *
gst_gl_filter_transform_caps (GstBaseTransform * bt,
GstPadDirection direction, GstCaps * caps, GstCaps * filter_caps)
{
GstGLFilter *filter = GST_GL_FILTER (bt);
GstCaps *tmp = NULL;
GstCaps *result = NULL;
result = gst_gl_filter_caps_remove_size (caps);
tmp = result;
GST_DEBUG_OBJECT (bt, "size removal returned caps %" GST_PTR_FORMAT, tmp);
tmp = GST_GL_FILTER_GET_CLASS (filter)->transform_internal_caps (filter,
direction, caps, NULL);
result =
gst_gl_filter_set_caps_features (tmp, GST_CAPS_FEATURE_MEMORY_GL_MEMORY);
@ -690,8 +704,10 @@ gst_gl_filter_set_caps (GstBaseTransform * bt, GstCaps * incaps,
gst_caps_replace (&filter->out_caps, outcaps);
GST_DEBUG ("set_caps %dx%d", GST_VIDEO_INFO_WIDTH (&filter->out_info),
GST_VIDEO_INFO_HEIGHT (&filter->out_info));
GST_DEBUG_OBJECT (filter, "set_caps %dx%d in %" GST_PTR_FORMAT
" out %" GST_PTR_FORMAT,
GST_VIDEO_INFO_WIDTH (&filter->out_info),
GST_VIDEO_INFO_HEIGHT (&filter->out_info), incaps, outcaps);
return TRUE;

5
gst-libs/gst/gl/gstglfilter.h
View file

@ -94,6 +94,8 @@ struct _GstGLFilter
* @init_fbo: perform initialization when the Framebuffer object is created
* @display_init_cb: execute arbitrary gl code on start
* @display_reset_cb: execute arbitrary gl code at stop
* @transform_internal_caps: Perform sub-class specific modifications of the
* caps to be processed between upload on input and before download for output.
*/
struct _GstGLFilterClass
{
@ -104,6 +106,9 @@ struct _GstGLFilterClass
gboolean (*filter_texture) (GstGLFilter *filter, guint in_tex, guint out_tex);
gboolean (*init_fbo) (GstGLFilter *filter);
GstCaps *(*transform_internal_caps) (GstGLFilter *filter,
GstPadDirection direction, GstCaps * caps, GstCaps * filter_caps);
/* useful to init and cleanup custom gl resources */
void (*display_init_cb) (GstGLFilter *filter);
void (*display_reset_cb) (GstGLFilter *filter);