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ext/libvisual/visual.c: Don't use gst_pad_use_fixed_caps, because it prevents downstream from being able to renegotia...

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Original commit message from CVS:
* ext/libvisual/visual.c: (gst_visual_init),
(gst_vis_src_negotiate), (get_buffer), (plugin_init):
Don't use gst_pad_use_fixed_caps, because it prevents downstream from
being able to renegotiate the size. Instead, use the negotiation
algorithm from the goom plugin to pick an initial output caps.

Also, allow theoretical libvisual plugins that might support non-GL
output even if they also do GL.
This commit is contained in:
Jan Schmidt 2006-02-27 12:08:22 +00:00
parent 40e0d19c99
commit 7bf899a3f5
2 changed files with 65 additions and 59 deletions
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11
ChangeLog
View file

@ -1,3 +1,14 @@
2006-02-27 Jan Schmidt <thaytan@mad.scientist.com>
* ext/libvisual/visual.c: (gst_visual_init),
(gst_vis_src_negotiate), (get_buffer), (plugin_init):
Don't use gst_pad_use_fixed_caps, because it prevents downstream from
being able to renegotiate the size. Instead, use the negotiation
algorithm from the goom plugin to pick an initial output caps.
Also, allow theoretical libvisual plugins that might support non-GL
output even if they also do GL.
2006-02-26 Julien MOUTTE <julien@moutte.net>
* ext/libvisual/visual.c: (gst_visual_init),

113
ext/libvisual/visual.c
View file

@ -196,7 +196,6 @@ gst_visual_init (GstVisual * visual)
visual->srcpad = gst_pad_new_from_static_template (&src_template, "src");
gst_pad_set_setcaps_function (visual->srcpad, gst_visual_src_setcaps);
gst_pad_set_getcaps_function (visual->srcpad, gst_visual_getcaps);
gst_pad_use_fixed_caps (visual->srcpad);
gst_element_add_pad (GST_ELEMENT (visual), visual->srcpad);
visual->next_ts = 0;
@ -308,72 +307,67 @@ gst_visual_sink_setcaps (GstPad * pad, GstCaps * caps)
return TRUE;
}
static gboolean
gst_vis_src_negotiate (GstVisual * visual)
{
GstCaps *othercaps, *target, *intersect;
GstStructure *structure;
const GstCaps *templ;
templ = gst_pad_get_pad_template_caps (visual->srcpad);
/* see what the peer can do */
othercaps = gst_pad_peer_get_caps (visual->srcpad);
if (othercaps) {
intersect = gst_caps_intersect (othercaps, templ);
gst_caps_unref (othercaps);
if (gst_caps_is_empty (intersect))
goto no_format;
target = gst_caps_copy_nth (intersect, 0);
gst_caps_unref (intersect);
} else {
target = gst_caps_ref ((GstCaps *) templ);
}
structure = gst_caps_get_structure (target, 0);
gst_structure_fixate_field_nearest_int (structure, "width", 320);
gst_structure_fixate_field_nearest_int (structure, "height", 240);
gst_structure_fixate_field_nearest_fraction (structure, "framerate", 30, 1);
gst_pad_set_caps (visual->srcpad, target);
gst_caps_unref (target);
return TRUE;
no_format:
{
gst_caps_unref (intersect);
gst_caps_unref (othercaps);
return FALSE;
}
}
static GstFlowReturn
get_buffer (GstVisual * visual, GstBuffer ** outbuf)
{
GstFlowReturn ret;
if (GST_PAD_CAPS (visual->srcpad) == NULL) {
gint width, height, bpp;
GstStructure *s;
GstCaps *caps;
GST_DEBUG_OBJECT (visual, "no src caps defined yet, try to set some");
/* No output caps current set up. Try and pick some */
caps = gst_pad_get_allowed_caps (visual->srcpad);
if (gst_caps_is_empty (caps)) {
GST_DEBUG_OBJECT (visual, "allowed caps are empty");
gst_caps_unref (caps);
if (!gst_vis_src_negotiate (visual))
return GST_FLOW_NOT_NEGOTIATED;
}
if (!gst_caps_is_fixed (caps)) {
/* OK, not fixed, fixate the width and height */
caps = gst_caps_make_writable (caps);
gst_caps_truncate (caps);
s = gst_caps_get_structure (caps, 0);
gst_structure_fixate_field_nearest_int (s, "width", 320);
gst_structure_fixate_field_nearest_int (s, "height", 240);
gst_structure_fixate_field_nearest_fraction (s, "framerate", 25, 1);
GST_DEBUG_OBJECT (visual, "fixating caps to %" GST_PTR_FORMAT, caps);
gst_pad_fixate_caps (visual->srcpad, caps);
} else
s = gst_caps_get_structure (caps, 0);
GST_DEBUG_OBJECT (visual,
"Trying to alloc buffer with caps: %" GST_PTR_FORMAT, caps);
if (!gst_structure_get_int (s, "width", &width) ||
!gst_structure_get_int (s, "height", &height) ||
!gst_structure_get_int (s, "bpp", &bpp)) {
ret = FALSE;
} else {
ret =
gst_pad_alloc_buffer_and_set_caps (visual->srcpad,
GST_BUFFER_OFFSET_NONE, height * GST_ROUND_UP_4 (width) * bpp, caps,
outbuf);
}
if (GST_PAD_CAPS (visual->srcpad) == NULL)
gst_pad_set_caps (visual->srcpad, caps);
gst_caps_unref (caps);
} else {
GST_DEBUG_OBJECT (visual, "allocating output buffer with caps %"
GST_PTR_FORMAT, GST_PAD_CAPS (visual->srcpad));
ret =
gst_pad_alloc_buffer_and_set_caps (visual->srcpad,
GST_BUFFER_OFFSET_NONE,
visual->video->height * GST_ROUND_UP_4 (visual->video->width) *
visual->video->bpp, GST_PAD_CAPS (visual->srcpad), outbuf);
}
GST_DEBUG_OBJECT (visual, "allocating output buffer with caps %"
GST_PTR_FORMAT, GST_PAD_CAPS (visual->srcpad));
ret =
gst_pad_alloc_buffer_and_set_caps (visual->srcpad,
GST_BUFFER_OFFSET_NONE,
visual->video->height * GST_ROUND_UP_4 (visual->video->width) *
visual->video->bpp, GST_PAD_CAPS (visual->srcpad), outbuf);
if (ret != GST_FLOW_OK)
return ret;
@ -587,7 +581,8 @@ plugin_init (GstPlugin * plugin)
actplugin = VISUAL_PLUGIN_ACTOR (visplugin->info->plugin);
if ((actplugin->depth & VISUAL_VIDEO_DEPTH_GL) > 0) {
/* Ignore plugins that only support GL output for now */
if (actplugin->depth == VISUAL_VIDEO_DEPTH_GL) {
GST_DEBUG ("plugin %s is a GL plugin (%d), ignoring",
ref->info->plugname, actplugin->depth);
is_gl = TRUE;