static GstFlowReturn
gst_rdt_depay_chain (GstPad * pad, GstBuffer * buf)
{
GstRDTDepay *rdtdepay;
GstFlowReturn ret;
GstClockTime timestamp;
gboolean more;
GstRDTPacket packet;
rdtdepay = GST_RDT_DEPAY (GST_PAD_PARENT (pad));
if (GST_BUFFER_IS_DISCONT (buf)) {
GST_LOG_OBJECT (rdtdepay, "received discont");
rdtdepay->discont = TRUE;
}
if (rdtdepay->header) {
GstBuffer *out;
out = rdtdepay->header;
rdtdepay->header = NULL;
/* push header data first */
ret = gst_rdt_depay_push (rdtdepay, out);
}
/* save timestamp */
timestamp = GST_BUFFER_TIMESTAMP (buf);
ret = GST_FLOW_OK;
GST_LOG_OBJECT (rdtdepay, "received buffer timestamp %" GST_TIME_FORMAT,
GST_TIME_ARGS (timestamp));
/* data is in RDT format. */
more = gst_rdt_buffer_get_first_packet (buf, &packet);
while (more) {
GstRDTType type;
type = gst_rdt_packet_get_type (&packet);
GST_DEBUG_OBJECT (rdtdepay, "Have packet of type %04x", type);
if (GST_RDT_IS_DATA_TYPE (type)) {
GST_DEBUG_OBJECT (rdtdepay, "We have a data packet");
ret = gst_rdt_depay_handle_data (rdtdepay, timestamp, &packet);
} else {
switch (type) {
default:
GST_DEBUG_OBJECT (rdtdepay, "Ignoring packet");
break;
}
}
if (ret != GST_FLOW_OK)
break;
more = gst_rdt_packet_move_to_next (&packet);
}
return ret;
}
static GstStateChangeReturn
gst_rdt_depay_change_state (GstElement * element, GstStateChange transition)
{
GstRDTDepay *rdtdepay;
GstStateChangeReturn ret;
rdtdepay = GST_RDT_DEPAY (element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
gst_segment_init (&rdtdepay->segment, GST_FORMAT_UNDEFINED);
rdtdepay->next_seqnum = -1;
rdtdepay->need_newsegment = TRUE;
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
if (rdtdepay->header)
gst_buffer_unref (rdtdepay->header);
rdtdepay->header = NULL;
break;
case GST_STATE_CHANGE_READY_TO_NULL:
break;
default:
break;
}
return ret;
}
static void
gst_rdt_depay_finalize (GObject * object)
{
GstRDTDepay *rdtdepay;
rdtdepay = GST_RDT_DEPAY (object);
if (rdtdepay->header)
gst_buffer_unref (rdtdepay->header);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_rdt_depay_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstRDTDepay *rdtdepay;
rdtdepay = GST_RDT_DEPAY (object);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_rdt_depay_sink_event (GstPad * pad, GstEvent * event)
{
GstRDTDepay *depay;
gboolean res = TRUE;
depay = GST_RDT_DEPAY (GST_OBJECT_PARENT (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH_STOP:
res = gst_pad_push_event (depay->srcpad, event);
gst_segment_init (&depay->segment, GST_FORMAT_UNDEFINED);
depay->need_newsegment = TRUE;
depay->next_seqnum = -1;
break;
case GST_EVENT_NEWSEGMENT:
{
gboolean update;
gdouble rate;
GstFormat fmt;
gint64 start, stop, position;
gst_event_parse_new_segment (event, &update, &rate, &fmt, &start, &stop,
&position);
gst_segment_set_newsegment (&depay->segment, update, rate, fmt,
start, stop, position);
/* don't pass the event downstream, we generate our own segment
* including the NTP time and other things we receive in caps */
gst_event_unref (event);
break;
}
default:
/* pass other events forward */
res = gst_pad_push_event (depay->srcpad, event);
break;
}
return res;
}
static gboolean
gst_rdt_depay_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
GstRDTDepay *depay;
gboolean res = TRUE;
depay = GST_RDT_DEPAY (parent);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CAPS:
{
GstCaps *caps;
gst_event_parse_caps (event, &caps);
res = gst_rdt_depay_setcaps (pad, caps);
gst_event_unref (event);
break;
}
case GST_EVENT_FLUSH_STOP:
res = gst_pad_push_event (depay->srcpad, event);
gst_segment_init (&depay->segment, GST_FORMAT_UNDEFINED);
depay->need_newsegment = TRUE;
depay->next_seqnum = -1;
break;
case GST_EVENT_SEGMENT:
{
gst_event_copy_segment (event, &depay->segment);
/* don't pass the event downstream, we generate our own segment
* including the NTP time and other things we receive in caps */
gst_event_unref (event);
break;
}
default:
/* pass other events forward */
res = gst_pad_push_event (depay->srcpad, event);
break;
}
return res;
}
static gboolean
gst_rdt_depay_setcaps (GstPad * pad, GstCaps * caps)
{
GstStructure *structure;
GstRDTDepay *rdtdepay;
GstCaps *srccaps;
gint clock_rate = 1000; /* default */
const GValue *value;
GstBuffer *header;
rdtdepay = GST_RDT_DEPAY (GST_PAD_PARENT (pad));
structure = gst_caps_get_structure (caps, 0);
if (gst_structure_has_field (structure, "clock-rate"))
gst_structure_get_int (structure, "clock-rate", &clock_rate);
/* config contains the RealMedia header as a buffer. */
value = gst_structure_get_value (structure, "config");
if (!value)
goto no_header;
header = gst_value_get_buffer (value);
if (!header)
goto no_header;
/* get other values for newsegment */
value = gst_structure_get_value (structure, "npt-start");
if (value && G_VALUE_HOLDS_UINT64 (value))
rdtdepay->npt_start = g_value_get_uint64 (value);
else
rdtdepay->npt_start = 0;
GST_DEBUG_OBJECT (rdtdepay, "NPT start %" G_GUINT64_FORMAT,
rdtdepay->npt_start);
value = gst_structure_get_value (structure, "npt-stop");
if (value && G_VALUE_HOLDS_UINT64 (value))
rdtdepay->npt_stop = g_value_get_uint64 (value);
else
rdtdepay->npt_stop = -1;
GST_DEBUG_OBJECT (rdtdepay, "NPT stop %" G_GUINT64_FORMAT,
rdtdepay->npt_stop);
value = gst_structure_get_value (structure, "play-speed");
if (value && G_VALUE_HOLDS_DOUBLE (value))
rdtdepay->play_speed = g_value_get_double (value);
else
rdtdepay->play_speed = 1.0;
value = gst_structure_get_value (structure, "play-scale");
if (value && G_VALUE_HOLDS_DOUBLE (value))
rdtdepay->play_scale = g_value_get_double (value);
else
rdtdepay->play_scale = 1.0;
/* caps seem good, configure element */
rdtdepay->clock_rate = clock_rate;
/* set caps on pad and on header */
srccaps = gst_caps_new_empty_simple ("application/vnd.rn-realmedia");
gst_pad_set_caps (rdtdepay->srcpad, srccaps);
gst_caps_unref (srccaps);
if (rdtdepay->header)
gst_buffer_unref (rdtdepay->header);
rdtdepay->header = gst_buffer_ref (header);
return TRUE;
/* ERRORS */
no_header:
{
GST_ERROR_OBJECT (rdtdepay, "no header found in caps, no 'config' field");
return FALSE;
}
}
