static GstFlowReturn
gst_funnel_sink_chain_object (GstPad * pad, GstFunnel * funnel,
gboolean is_list, GstMiniObject * obj)
{
GstFlowReturn res;
GST_DEBUG_OBJECT (pad, "received %" GST_PTR_FORMAT, obj);
GST_PAD_STREAM_LOCK (funnel->srcpad);
if ((funnel->last_sinkpad == NULL)
|| ((funnel->forward_sticky_events_mode !=
GST_FUNNEL_FORWARD_STICKY_EVENTS_MODE_NEVER)
&& (funnel->last_sinkpad != pad))) {
GST_DEBUG_OBJECT (pad, "Forwarding sticky events");
gst_pad_sticky_events_foreach (pad, forward_events_on_stream_changed,
funnel);
gst_object_replace ((GstObject **) & funnel->last_sinkpad,
GST_OBJECT (pad));
}
if (is_list)
res = gst_pad_push_list (funnel->srcpad, GST_BUFFER_LIST_CAST (obj));
else
res = gst_pad_push (funnel->srcpad, GST_BUFFER_CAST (obj));
GST_PAD_STREAM_UNLOCK (funnel->srcpad);
GST_LOG_OBJECT (pad, "handled buffer%s %s", (is_list ? "list" : ""),
gst_flow_get_name (res));
return res;
}
static GstFlowReturn
gst_tee_do_push (GstTee * tee, GstPad * pad, gpointer data, gboolean is_list)
{
GstFlowReturn res;
/* Push */
if (pad == tee->pull_pad) {
/* don't push on the pad we're pulling from */
res = GST_FLOW_OK;
} else if (is_list) {
res =
gst_pad_push_list (pad,
gst_buffer_list_ref (GST_BUFFER_LIST_CAST (data)));
} else {
res = gst_pad_push (pad, gst_buffer_ref (GST_BUFFER_CAST (data)));
}
return res;
}
static GstFlowReturn
gst_tee_handle_data (GstTee * tee, gpointer data, gboolean is_list)
{
GList *pads;
guint32 cookie;
GstFlowReturn ret, cret;
if (G_UNLIKELY (!tee->silent))
gst_tee_do_message (tee, tee->sinkpad, data, is_list);
GST_OBJECT_LOCK (tee);
pads = GST_ELEMENT_CAST (tee)->srcpads;
/* special case for zero pads */
if (G_UNLIKELY (!pads))
goto no_pads;
/* special case for just one pad that avoids reffing the buffer */
if (!pads->next) {
GstPad *pad = GST_PAD_CAST (pads->data);
/* Keep another ref around, a pad probe
* might release and destroy the pad */
gst_object_ref (pad);
GST_OBJECT_UNLOCK (tee);
if (pad == tee->pull_pad) {
ret = GST_FLOW_OK;
} else if (is_list) {
ret = gst_pad_push_list (pad, GST_BUFFER_LIST_CAST (data));
} else {
ret = gst_pad_push (pad, GST_BUFFER_CAST (data));
}
gst_object_unref (pad);
if (ret == GST_FLOW_NOT_LINKED && tee->allow_not_linked) {
ret = GST_FLOW_OK;
}
return ret;
}
/* mark all pads as 'not pushed on yet' */
g_list_foreach (pads, (GFunc) clear_pads, tee);
restart:
if (tee->allow_not_linked) {
cret = GST_FLOW_OK;
} else {
cret = GST_FLOW_NOT_LINKED;
}
pads = GST_ELEMENT_CAST (tee)->srcpads;
cookie = GST_ELEMENT_CAST (tee)->pads_cookie;
while (pads) {
GstPad *pad;
pad = GST_PAD_CAST (pads->data);
if (G_LIKELY (!GST_TEE_PAD_CAST (pad)->pushed)) {
/* not yet pushed, release lock and start pushing */
gst_object_ref (pad);
GST_OBJECT_UNLOCK (tee);
GST_LOG_OBJECT (pad, "Starting to push %s %p",
is_list ? "list" : "buffer", data);
ret = gst_tee_do_push (tee, pad, data, is_list);
GST_LOG_OBJECT (pad, "Pushing item %p yielded result %s", data,
gst_flow_get_name (ret));
GST_OBJECT_LOCK (tee);
/* keep track of which pad we pushed and the result value */
GST_TEE_PAD_CAST (pad)->pushed = TRUE;
GST_TEE_PAD_CAST (pad)->result = ret;
gst_object_unref (pad);
pad = NULL;
} else {
/* already pushed, use previous return value */
ret = GST_TEE_PAD_CAST (pad)->result;
GST_LOG_OBJECT (pad, "pad already pushed with %s",
gst_flow_get_name (ret));
}
/* before we go combining the return value, check if the pad list is still
* the same. It could be possible that the pad we just pushed was removed
* and the return value it not valid anymore */
if (G_UNLIKELY (GST_ELEMENT_CAST (tee)->pads_cookie != cookie)) {
GST_LOG_OBJECT (tee, "pad list changed");
/* the list of pads changed, restart iteration. Pads that we already
* pushed on and are still in the new list, will not be pushed on
* again. */
goto restart;
}
/* stop pushing more buffers when we have a fatal error */
if (G_UNLIKELY (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED))
goto error;
/* keep all other return values, overwriting the previous one. */
if (G_LIKELY (ret != GST_FLOW_NOT_LINKED)) {
GST_LOG_OBJECT (tee, "Replacing ret val %d with %d", cret, ret);
cret = ret;
}
pads = g_list_next (pads);
}
GST_OBJECT_UNLOCK (tee);
gst_mini_object_unref (GST_MINI_OBJECT_CAST (data));
/* no need to unset gvalue */
return cret;
/* ERRORS */
no_pads:
{
if (tee->allow_not_linked) {
GST_DEBUG_OBJECT (tee, "there are no pads, dropping %s",
is_list ? "buffer-list" : "buffer");
ret = GST_FLOW_OK;
} else {
GST_DEBUG_OBJECT (tee, "there are no pads, return not-linked");
ret = GST_FLOW_NOT_LINKED;
}
goto end;
}
error:
{
GST_DEBUG_OBJECT (tee, "received error %s", gst_flow_get_name (ret));
goto end;
}
end:
{
GST_OBJECT_UNLOCK (tee);
gst_mini_object_unref (GST_MINI_OBJECT_CAST (data));
return ret;
}
}
/* Updates the SSRC, payload type, seqnum and timestamp of the RTP buffer
* before the buffer is pushed. */
static GstFlowReturn
gst_rtp_base_payload_prepare_push (GstRTPBasePayload * payload,
gpointer obj, gboolean is_list)
{
GstRTPBasePayloadPrivate *priv;
HeaderData data;
if (payload->clock_rate == 0)
goto no_rate;
priv = payload->priv;
/* update first, so that the property is set to the last
* seqnum pushed */
payload->seqnum = priv->next_seqnum;
/* fill in the fields we want to set on all headers */
data.payload = payload;
data.seqnum = payload->seqnum;
data.ssrc = payload->current_ssrc;
data.pt = payload->pt;
/* find the first buffer with a timestamp */
if (is_list) {
data.dts = -1;
data.pts = -1;
data.offset = GST_BUFFER_OFFSET_NONE;
gst_buffer_list_foreach (GST_BUFFER_LIST_CAST (obj), find_timestamp, &data);
} else {
data.dts = GST_BUFFER_DTS (GST_BUFFER_CAST (obj));
data.pts = GST_BUFFER_PTS (GST_BUFFER_CAST (obj));
data.offset = GST_BUFFER_OFFSET (GST_BUFFER_CAST (obj));
}
/* convert to RTP time */
if (priv->perfect_rtptime && data.offset != GST_BUFFER_OFFSET_NONE &&
priv->base_offset != GST_BUFFER_OFFSET_NONE) {
/* if we have an offset, use that for making an RTP timestamp */
data.rtptime = payload->ts_base + priv->base_rtime +
data.offset - priv->base_offset;
GST_LOG_OBJECT (payload,
"Using offset %" G_GUINT64_FORMAT " for RTP timestamp", data.offset);
} else if (GST_CLOCK_TIME_IS_VALID (data.pts)) {
gint64 rtime;
/* no offset, use the gstreamer pts */
rtime = gst_segment_to_running_time (&payload->segment, GST_FORMAT_TIME,
data.pts);
if (rtime == -1) {
GST_LOG_OBJECT (payload, "Clipped pts, using base RTP timestamp");
rtime = 0;
} else {
GST_LOG_OBJECT (payload,
"Using running_time %" GST_TIME_FORMAT " for RTP timestamp",
GST_TIME_ARGS (rtime));
rtime =
gst_util_uint64_scale_int (rtime, payload->clock_rate, GST_SECOND);
priv->base_offset = data.offset;
priv->base_rtime = rtime;
}
/* add running_time in clock-rate units to the base timestamp */
data.rtptime = payload->ts_base + rtime;
} else {
GST_LOG_OBJECT (payload,
"Using previous RTP timestamp %" G_GUINT32_FORMAT, payload->timestamp);
/* no timestamp to convert, take previous timestamp */
data.rtptime = payload->timestamp;
}
/* set ssrc, payload type, seq number, caps and rtptime */
if (is_list) {
gst_buffer_list_foreach (GST_BUFFER_LIST_CAST (obj), set_headers, &data);
} else {
GstBuffer *buf = GST_BUFFER_CAST (obj);
set_headers (&buf, 0, &data);
}
priv->next_seqnum = data.seqnum;
payload->timestamp = data.rtptime;
GST_LOG_OBJECT (payload, "Preparing to push packet with size %"
G_GSIZE_FORMAT ", seq=%d, rtptime=%u, pts %" GST_TIME_FORMAT,
(is_list) ? -1 : gst_buffer_get_size (GST_BUFFER (obj)),
payload->seqnum, data.rtptime, GST_TIME_ARGS (data.pts));
if (g_atomic_int_compare_and_exchange (&payload->
priv->notified_first_timestamp, 1, 0)) {
g_object_notify (G_OBJECT (payload), "timestamp");
g_object_notify (G_OBJECT (payload), "seqnum");
}
return GST_FLOW_OK;
/* ERRORS */
no_rate:
{
GST_ELEMENT_ERROR (payload, STREAM, NOT_IMPLEMENTED, (NULL),
("subclass did not specify clock-rate"));
return GST_FLOW_ERROR;
}
}
/**
* gst_app_sink_pull_buffer_list:
* @appsink: a #GstAppSink
*
* This function blocks until a buffer list or EOS becomes available or the
* appsink element is set to the READY/NULL state.
*
* This function will only return buffer lists when the appsink is in the
* PLAYING state. All rendered buffer lists will be put in a queue so that
* the application can pull buffer lists at its own rate. Note that when
* the application does not pull buffer lists fast enough, the queued buffer
* lists could consume a lot of memory, especially when dealing with raw
* video frames.
*
* If an EOS event was received before any buffer lists, this function returns
* %NULL. Use gst_app_sink_is_eos () to check for the EOS condition.
*
* Returns: a #GstBufferList or NULL when the appsink is stopped or EOS.
*/
EXPORT_C GstBufferList *
gst_app_sink_pull_buffer_list (GstAppSink * appsink)
{
GST_DEBUG_OBJECT (appsink, "pull a buffer list");
return GST_BUFFER_LIST_CAST (gst_app_sink_pull_object (appsink));
}
