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ccconverter: fix framerate caps negotiation from non-cdp to cdp

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We can only convert from non-cdp to cdp within the confines of valid cdp
framerates.  The existing caps negotiation code was allowing any
framerate to convert to a cdp output which is incorrect and would hit an
assertion later.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/2372>
This commit is contained in:
Matthew Waters 2021-07-02 13:10:25 +10:00 committed by Sebastian Dröge
parent 5d96e9e7bd
commit 8fd2c68968
2 changed files with 22 additions and 5 deletions
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11
ext/closedcaption/gstccconverter.c
View file

@ -138,6 +138,9 @@ gst_cc_converter_transform_caps (GstBaseTransform * base,
templ = gst_pad_get_pad_template_caps (base->srcpad);
GST_DEBUG_OBJECT (self, "direction %s from caps %" GST_PTR_FORMAT,
direction == GST_PAD_SRC ? "src" : "sink", caps);
res = gst_caps_new_empty ();
n = gst_caps_get_size (caps);
for (i = 0; i < n; i++) {
@ -312,9 +315,13 @@ gst_cc_converter_transform_caps (GstBaseTransform * base,
/* There's an intersection between the framerates so we can convert
* into CDP with exactly those framerates */
cdp_framerate = gst_structure_get_value (t, "framerate");
gst_caps_set_value (tmp, "framerate", cdp_framerate);
if (gst_value_intersect (NULL, cdp_framerate, framerate)) {
gst_caps_set_value (tmp, "framerate", cdp_framerate);
res = gst_caps_merge (res, tmp);
res = gst_caps_merge (res, tmp);
} else {
gst_clear_caps (&tmp);
}
}
/* We can always convert CEA708 to all non-CDP formats */
if (framerate) {

16
tests/check/elements/ccconverter.c
View file

@ -34,7 +34,7 @@ enum CheckConversionFlags
FLAG_SEND_EOS = 1,
};
GST_START_TEST (cdp_requires_framerate)
GST_START_TEST (cdp_requires_valid_framerate)
{
GstHarness *h;
GstBuffer *buffer;
@ -74,7 +74,17 @@ GST_START_TEST (cdp_requires_framerate)
gst_harness_set_src_caps_str (h,
"closedcaption/x-cea-708,format=(string)cc_data,framerate=(fraction)30/1");
fail_unless_equals_int (gst_harness_push (h, buffer), GST_FLOW_OK);
fail_unless_equals_int (gst_harness_push (h, gst_buffer_ref (buffer)),
GST_FLOW_OK);
/* Then try with an invalid CDP framerate, this should fail */
gst_harness_set_sink_caps_str (h,
"closedcaption/x-cea-708,format=(string)cdp");
gst_harness_set_src_caps_str (h,
"closedcaption/x-cea-708,format=(string)cc_data,framerate=(fraction)29/1");
fail_unless_equals_int (gst_harness_push (h, buffer),
GST_FLOW_NOT_NEGOTIATED);
gst_harness_teardown (h);
}
@ -960,7 +970,7 @@ ccextractor_suite (void)
suite_add_tcase (s, tc);
tcase_add_test (tc, cdp_requires_framerate);
tcase_add_test (tc, cdp_requires_valid_framerate);
tcase_add_test (tc, framerate_passthrough);
tcase_add_test (tc, framerate_changes);
tcase_add_test (tc, framerate_invalid_format);