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add link function. fixes @148986

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Original commit message from CVS:
add link function. fixes @148986
This commit is contained in:
Thomas Vander Stichele 2004-08-02 09:16:14 +00:00
parent 93d6475a67
commit 1f00cce2f7
1 changed files with 46 additions and 0 deletions
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46
ext/lame/gstlame.c
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@ -346,6 +346,51 @@ gst_lame_class_init (GstLameClass * klass)
gstelement_class->change_state = gst_lame_change_state;
}
static GstPadLinkReturn
gst_lame_src_link (GstPad * pad, const GstCaps * caps)
{
GstLame *lame;
gint out_samplerate;
GstStructure *structure;
GstCaps *othercaps, *channelcaps;
GstPadLinkReturn result;
lame = GST_LAME (gst_pad_get_parent (pad));
structure = gst_caps_get_structure (caps, 0);
if (!gst_structure_get_int (structure, "rate", &out_samplerate) ||
!gst_structure_get_int (structure, "channels", &lame->num_channels))
g_return_val_if_reached (GST_PAD_LINK_REFUSED);
if (lame_set_out_samplerate (lame->lgf, out_samplerate) != 0)
return GST_PAD_LINK_REFUSED;
/* we don't do channel conversion */
channelcaps = gst_caps_new_simple ("audio/x-raw-int", "chnnels", G_TYPE_INT,
lame->num_channels, NULL);
othercaps = gst_caps_intersect (gst_pad_get_pad_template_caps (lame->sinkpad),
channelcaps);
gst_caps_free (channelcaps);
result = gst_pad_try_set_caps_nonfixed (lame->sinkpad, othercaps);
if (GST_PAD_LINK_FAILED (result))
return result;
caps = gst_pad_get_negotiated_caps (lame->sinkpad);
structure = gst_caps_get_structure (caps, 0);
if (!gst_structure_get_int (structure, "rate", &lame->samplerate))
g_return_val_if_reached (GST_PAD_LINK_REFUSED);
if (!gst_lame_setup (lame)) {
GST_ELEMENT_ERROR (lame, CORE, NEGOTIATION, (NULL),
("could not initialize encoder (wrong parameters?)"));
return GST_PAD_LINK_REFUSED;
}
return result;
}
static GstPadLinkReturn
gst_lame_sink_link (GstPad * pad, const GstCaps * caps)
{
@ -394,6 +439,7 @@ gst_lame_init (GstLame * lame)
gst_pad_new_from_template (gst_static_pad_template_get
(&gst_lame_src_template), "src");
gst_element_add_pad (GST_ELEMENT (lame), lame->srcpad);
gst_pad_set_link_function (lame->srcpad, gst_lame_src_link);
GST_FLAG_SET (lame, GST_ELEMENT_EVENT_AWARE);