static GstFlowReturn
gst_span_plc_chain (GstPad * pad, GstBuffer * buffer)
{
GstSpanPlc *plc = GST_SPAN_PLC (GST_PAD_PARENT (pad));
GstClockTime buffer_duration;
if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer))
plc->last_stop = GST_BUFFER_TIMESTAMP (buffer);
else
GST_WARNING_OBJECT (plc, "Buffer has no timestamp!");
if (GST_BUFFER_DURATION_IS_VALID (buffer)) {
buffer_duration = GST_BUFFER_DURATION (buffer);
} else {
GST_WARNING_OBJECT (plc, "Buffer has no duration!");
buffer_duration = (GST_BUFFER_SIZE (buffer) /
(plc->sample_rate * sizeof (guint16))) * GST_SECOND;
GST_DEBUG_OBJECT (plc, "Buffer duration : %" GST_TIME_FORMAT,
GST_TIME_ARGS (buffer_duration));
}
plc->last_stop += buffer_duration;
if (plc->plc_state->missing_samples != 0)
buffer = gst_buffer_make_writable (buffer);
plc_rx (plc->plc_state, (int16_t *) GST_BUFFER_DATA (buffer),
GST_BUFFER_SIZE (buffer) / 2);
return gst_pad_push (plc->srcpad, buffer);
}
static GstStateChangeReturn
gst_span_plc_change_state (GstElement * element, GstStateChange transition)
{
GstSpanPlc *plc = GST_SPAN_PLC (element);
GstStateChangeReturn ret;
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
gst_span_plc_flush (plc, TRUE);
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_NULL:
gst_span_plc_flush (plc, FALSE);
default:
break;
}
return ret;
}
static gboolean
gst_span_plc_event_sink (GstPad * pad, GstObject * parent, GstEvent * event)
{
GstSpanPlc *plc = GST_SPAN_PLC (parent);
GST_DEBUG_OBJECT (plc, "received event %s", GST_EVENT_TYPE_NAME (event));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CAPS:
{
GstCaps *caps;
gst_event_parse_caps (event, &caps);
gst_span_plc_setcaps_sink (plc, caps);
break;
}
case GST_EVENT_GAP:
{
GstClockTime timestamp;
GstClockTime duration;
gst_event_parse_gap (event, ×tamp, &duration);
gst_span_plc_send_fillin (plc, timestamp, duration);
gst_event_unref (event);
return TRUE;
}
case GST_EVENT_FLUSH_STOP:
gst_span_plc_flush (plc, TRUE);
break;
default:
break;
}
return gst_pad_push_event (plc->srcpad, event);
}
static void
gst_span_plc_dispose (GObject * object)
{
GstSpanPlc *plc = GST_SPAN_PLC (object);
if (plc->plc_state)
plc_free (plc->plc_state);
plc->plc_state = NULL;
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static GstFlowReturn
gst_span_plc_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
{
GstSpanPlc *plc = GST_SPAN_PLC (parent);
GstMapInfo map;
buffer = gst_buffer_make_writable (buffer);
gst_buffer_map (buffer, &map, GST_MAP_READWRITE);
plc_rx (plc->plc_state, (int16_t *) map.data, map.size / 2);
gst_buffer_unmap (buffer, &map);
return gst_pad_push (plc->srcpad, buffer);
}
static gboolean
gst_span_plc_event_sink (GstPad * pad, GstEvent * event)
{
gboolean ret = FALSE;
GstSpanPlc *plc = GST_SPAN_PLC (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (plc, "received event %s", GST_EVENT_TYPE_NAME (event));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_NEWSEGMENT:
{
GstFormat format;
gdouble rate;
gint64 start, stop, time;
gboolean update;
gst_event_parse_new_segment (event, &update, &rate, &format, &start,
&stop, &time);
if (format != GST_FORMAT_TIME)
goto newseg_wrong_format;
if (update) {
/* time progressed without data, see if we can fill the gap with
* some concealment data */
if (plc->last_stop < start)
gst_span_plc_send_fillin (plc, start - plc->last_stop);
}
plc->last_stop = start;
break;
}
case GST_EVENT_FLUSH_START:
gst_span_plc_flush (plc, TRUE);
break;
default:
break;
}
ret = gst_pad_push_event (plc->srcpad, event);
gst_object_unref (plc);
return ret;
newseg_wrong_format:
{
GST_DEBUG_OBJECT (plc, "received non TIME newsegment");
gst_object_unref (plc);
return FALSE;
}
}
static gboolean
gst_span_plc_setcaps_sink (GstPad * pad, GstCaps * caps)
{
GstSpanPlc *plc = GST_SPAN_PLC (gst_pad_get_parent (pad));
GstStructure *s = NULL;
gboolean ret = FALSE;
ret = gst_pad_set_caps (plc->srcpad, caps);
s = gst_caps_get_structure (caps, 0);
if (s) {
gst_structure_get_int (s, "rate", &plc->sample_rate);
GST_DEBUG_OBJECT (plc, "setcaps: got sample rate : %d", plc->sample_rate);
}
gst_span_plc_flush (plc, TRUE);
gst_object_unref (plc);
return ret;
}
