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/* GStreamer
*
* unit testing helper lib
*
* Copyright (C) 2009 Edward Hervey <bilboed@bilboed.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:gstcheckconsistencychecker
* @short_description: Data flow consistency checker for GStreamer unit tests.
*
* These macros and functions are for internal use of the unit tests found
* inside the 'check' directories of various GStreamer packages.
*
* Since: 0.10.24
*/
#include "gstconsistencychecker.h"
struct _GstStreamConsistency
{
gboolean flushing;
gboolean segment;
gboolean eos;
gulong probeid;
GstPad *pad;
};
static gboolean
source_pad_data_cb (GstPad * pad, GstProbeType type, GstMiniObject * data,
GstStreamConsistency * consist)
{
if (GST_IS_BUFFER (data)) {
GST_DEBUG_OBJECT (pad, "Buffer %" GST_TIME_FORMAT,
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (GST_BUFFER (data))));
/* If an EOS went through, a buffer would be invalid */
fail_if (consist->eos, "Buffer received after EOS");
/* Buffers need to be preceded by a segment event */
fail_unless (consist->segment, "Buffer received without segment");
} else if (GST_IS_EVENT (data)) {
GstEvent *event = (GstEvent *) data;
GST_DEBUG_OBJECT (pad, "%s", GST_EVENT_TYPE_NAME (event));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH_START:
consist->flushing = TRUE;
break;
case GST_EVENT_FLUSH_STOP:
/* Receiving a flush-stop is only valid after receiving a flush-start */
fail_unless (consist->flushing,
"Received a FLUSH_STOP without a FLUSH_START");
fail_if (consist->eos, "Received a FLUSH_STOP after an EOS");
consist->flushing = FALSE;
break;
case GST_EVENT_SEGMENT:
consist->segment = TRUE;
consist->eos = FALSE;
break;
case GST_EVENT_EOS:
/* FIXME : not 100% sure about whether two eos in a row is valid */
fail_if (consist->eos, "Received EOS just after another EOS");
consist->eos = TRUE;
consist->segment = FALSE;
break;
case GST_EVENT_TAG:
GST_DEBUG_OBJECT (pad, "tag %" GST_PTR_FORMAT,
gst_event_get_structure (event));
/* fall through */
default:
if (GST_EVENT_IS_SERIALIZED (event) && GST_EVENT_IS_DOWNSTREAM (event)) {
fail_if (consist->eos, "Event received after EOS");
fail_unless (consist->segment, "Event received before segment");
}
/* FIXME : Figure out what to do for other events */
break;
}
}
return TRUE;
}
/**
* gst_consistency_checker_new:
* @pad: The #GstPad on which the dataflow will be checked.
*
* Sets up a data probe on the given pad which will raise assertions if the
* data flow is inconsistent.
*
* Currently only works for source pads.
*
* Returns: A #GstStreamConsistency structure used to track data flow.
*
* Since: 0.10.24
*/
GstStreamConsistency *
gst_consistency_checker_new (GstPad * pad)
{
GstStreamConsistency *consist;
g_return_val_if_fail (pad != NULL, NULL);
consist = g_new0 (GstStreamConsistency, 1);
consist->pad = g_object_ref (pad);
consist->probeid =
gst_pad_add_probe (pad, GST_PROBE_TYPE_DATA,
(GstPadProbeCallback) source_pad_data_cb, consist, NULL);
return consist;
}
/**
* gst_consistency_checker_reset:
* @consist: The #GstStreamConsistency to reset.
*
* Reset the stream checker's internal variables.
*
* Since: 0.10.24
*/
void
gst_consistency_checker_reset (GstStreamConsistency * consist)
{
consist->eos = FALSE;
consist->flushing = FALSE;
consist->segment = FALSE;
}
/**
* gst_consistency_checker_free:
* @consist: The #GstStreamConsistency to free.
*
* Frees the allocated data and probe associated with @consist.
*
* Since: 0.10.24
*/
void
gst_consistency_checker_free (GstStreamConsistency * consist)
{
/* Remove the data probe */
gst_pad_remove_probe (consist->pad, consist->probeid);
g_object_unref (consist->pad);
g_free (consist);
}
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