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gst/gstpad.c (gst_pad_activate_pull): Refuse to activate unlinked sink pads in pull mode. In addition to being correc...

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Original commit message from CVS:
2007-01-12  Andy Wingo  <wingo@pobox.com>

* gst/gstpad.c (gst_pad_activate_pull): Refuse to activate unlinked
sink pads in pull mode. In addition to being correct, fixes
filesrc ! decodebin ! identity ! fakesink.
(gst_pad_get_range, gst_pad_pull_range): Don't call
gst_pad_set_caps() if the caps changes; instead error out with
GST_FLOW_NOT_NEGOTIATED, as discussed in part-negotiation.txt.
This commit is contained in:
Andy Wingo 2007-01-12 15:48:00 +00:00
parent 10d3b02563
commit 871e807482
2 changed files with 31 additions and 23 deletions
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9
ChangeLog
View file

@ -1,3 +1,12 @@
2007-01-12 Andy Wingo <wingo@pobox.com>
* gst/gstpad.c (gst_pad_activate_pull): Refuse to activate unlinked
sink pads in pull mode. In addition to being correct, fixes
filesrc ! decodebin ! identity ! fakesink.
(gst_pad_get_range, gst_pad_pull_range): Don't call
gst_pad_set_caps() if the caps changes; instead error out with
GST_FLOW_NOT_NEGOTIATED, as discussed in part-negotiation.txt.
2007-01-12 Andy Wingo <wingo@pobox.com>
* docs/design/part-negotiation.txt: Update with more policy.

45
gst/gstpad.c
View file

@ -737,6 +737,8 @@ gst_pad_activate_pull (GstPad * pad, gboolean active)
if (G_UNLIKELY (!gst_pad_activate_pull (peer, active)))
goto peer_failed;
gst_object_unref (peer);
} else {
goto not_linked;
}
} else {
if (G_UNLIKELY (GST_PAD_GETRANGEFUNC (pad) == NULL))
@ -783,6 +785,12 @@ peer_failed:
gst_object_unref (peer);
return FALSE;
}
not_linked:
{
GST_CAT_INFO_OBJECT (GST_CAT_PADS, pad, "can't activate unlinked sink "
"pad in pull mode");
return FALSE;
}
failure:
{
GST_OBJECT_LOCK (pad);
@ -3692,10 +3700,8 @@ not_connected:
* installed (see gst_pad_set_getrange_function()) this function returns
* #GST_FLOW_NOT_SUPPORTED.
*
* This function will call gst_pad_set_caps() on @pad if the pull is successful
* and the caps on @buffer differ from what is already set on @pad, as is done
* in gst_pad_push(). This could cause the function to return
* #GST_FLOW_NOT_NEGOTIATED if the caps could not be set.
* @buffer's caps must either be unset or the same as what is already configured
* on @pad. Renegotiation within a running pull-mode pipeline is not supported.
*
* Returns: a #GstFlowReturn from the pad.
*
@ -3751,12 +3757,10 @@ gst_pad_get_range (GstPad * pad, guint64 offset, guint size,
caps_changed = caps && caps != GST_PAD_CAPS (pad);
GST_OBJECT_UNLOCK (pad);
/* we got a new datatype from the pad, it had better handle it */
if (G_UNLIKELY (caps_changed)) {
GST_DEBUG_OBJECT (pad, "caps changed to %p %" GST_PTR_FORMAT, caps, caps);
if (G_UNLIKELY (!gst_pad_configure_src (pad, caps, TRUE)))
goto not_negotiated;
}
/* we got a new datatype from the pad not supported in a running pull-mode
* pipeline */
if (G_UNLIKELY (caps_changed))
goto not_negotiated;
}
return ret;
@ -3791,8 +3795,8 @@ not_negotiated:
{
gst_buffer_unref (*buffer);
*buffer = NULL;
GST_CAT_DEBUG_OBJECT (GST_CAT_SCHEDULING, pad,
"getrange returned buffer then refused to accept the caps");
GST_CAT_WARNING_OBJECT (GST_CAT_SCHEDULING, pad,
"getrange returned buffer of different caps");
return GST_FLOW_NOT_NEGOTIATED;
}
}
@ -3815,10 +3819,8 @@ not_negotiated:
* See gst_pad_get_range() for a list of return values and for the
* semantics of the arguments of this function.
*
* This function will call gst_pad_set_caps() on @pad if the pull is successful
* and the caps on @buffer differ from what is already set on @pad, as is done
* in gst_pad_chain(). This could cause the function to return
* #GST_FLOW_NOT_NEGOTIATED if the caps could not be set.
* @buffer's caps must either be unset or the same as what is already configured
* on @pad. Renegotiation within a running pull-mode pipeline is not supported.
*
* Returns: a #GstFlowReturn from the peer pad.
* When this function returns #GST_FLOW_OK, @buffer will contain a valid
@ -3878,11 +3880,8 @@ gst_pad_pull_range (GstPad * pad, guint64 offset, guint size,
GST_OBJECT_UNLOCK (pad);
/* we got a new datatype on the pad, see if it can handle it */
if (G_UNLIKELY (caps_changed)) {
GST_DEBUG_OBJECT (pad, "caps changed to %p %" GST_PTR_FORMAT, caps, caps);
if (G_UNLIKELY (!gst_pad_configure_sink (pad, caps)))
goto not_negotiated;
}
if (G_UNLIKELY (caps_changed))
goto not_negotiated;
}
return ret;
@ -3907,8 +3906,8 @@ not_negotiated:
{
gst_buffer_unref (*buffer);
*buffer = NULL;
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
"pulled buffer but pad did not accept the caps");
GST_CAT_WARNING_OBJECT (GST_CAT_SCHEDULING, pad,
"pullrange returned buffer of different caps");
return GST_FLOW_NOT_NEGOTIATED;
}
}