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basetransform: If suggested caps are not compatible with upstream try to come up with compatible caps

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Fixes bug #662199.
This commit is contained in:
Sebastian Dröge 2011-12-07 09:50:40 +01:00
parent c33b50e00f
commit 7fb67e9d6f
1 changed files with 19 additions and 10 deletions
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29
libs/gst/base/gstbasetransform.c
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@ -688,7 +688,7 @@ no_out_size:
/* get the caps that can be handled by @pad. We perform:
*
* - take the caps of peer of otherpad,
* - filter against the padtemplate of otherpad,
* - filter against the padtemplate of otherpad,
* - calculate all transforms of remaining caps
* - filter against template of @pad
*
@ -1439,7 +1439,7 @@ compute_upstream_suggestion (GstBaseTransform * trans, guint expsize,
* This function can do renegotiation on the source pad
*
* The output buffer is always writable. outbuf can be equal to
* inbuf, the caller should be prepared for this and perform
* inbuf, the caller should be prepared for this and perform
* appropriate refcounting.
*/
static GstFlowReturn
@ -1894,6 +1894,7 @@ gst_base_transform_buffer_alloc (GstPad * pad, guint64 offset, guint size,
*/
peercaps =
gst_pad_peer_get_caps_reffed (GST_BASE_TRANSFORM_SINK_PAD (trans));
if (peercaps) {
GstCaps *intersect;
@ -1901,16 +1902,19 @@ gst_base_transform_buffer_alloc (GstPad * pad, guint64 offset, guint size,
gst_caps_intersect_full (sink_suggest, peercaps,
GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (peercaps);
/* If intersected caps is empty then just keep them empty. The
* code below will try to come up with possible caps if there
* are any */
gst_caps_unref (sink_suggest);
sink_suggest = intersect;
}
if (!gst_caps_is_fixed (sink_suggest) || gst_caps_is_empty (sink_suggest)) {
GST_DEBUG_OBJECT (trans, "Suggested caps is not fixed: %"
GST_PTR_FORMAT, sink_suggest);
if (gst_caps_is_empty (sink_suggest))
goto not_supported;
/* If the suggested caps are not empty and not fixed, try to fixate them */
if (!gst_caps_is_fixed (sink_suggest)
&& !gst_caps_is_empty (sink_suggest)) {
GST_DEBUG_OBJECT (trans,
"Suggested caps is not fixed: %" GST_PTR_FORMAT, sink_suggest);
/* try the alloc caps if it is still not fixed */
if (!gst_caps_is_fixed (sink_suggest)) {
@ -1941,6 +1945,11 @@ gst_base_transform_buffer_alloc (GstPad * pad, guint64 offset, guint size,
sink_suggest);
}
/* Check if the suggested caps are compatible with our
* sinkpad template caps and if they're not (or were
* empty after intersecting with the peer caps above)
* we try to come up with any supported caps
*/
if (sink_suggest) {
templ = gst_pad_get_pad_template_caps (pad);
@ -2424,7 +2433,7 @@ no_qos:
/* first try to allocate an output buffer based on the currently negotiated
* format. While we call pad-alloc we could renegotiate the srcpad format or
* have a new suggestion for upstream buffer-alloc.
* have a new suggestion for upstream buffer-alloc.
* In any case, outbuf will contain a buffer suitable for doing the configured
* transform after this function. */
ret = gst_base_transform_prepare_output_buffer (trans, inbuf, outbuf);
@ -2719,7 +2728,7 @@ gst_base_transform_activate (GstBaseTransform * trans, gboolean active)
gst_base_transform_drop_delayed_events (trans);
trans->have_same_caps = FALSE;
/* We can only reset the passthrough mode if the instance told us to
/* We can only reset the passthrough mode if the instance told us to
handle it in configure_caps */
if (bclass->passthrough_on_same_caps) {
gst_base_transform_set_passthrough (trans, FALSE);