/**
* gst_buffer_list_insert:
* @list: a #GstBufferList
* @idx: the index
* @buffer: (transfer full): a #GstBuffer
*
* Insert @buffer at @idx in @list. Other buffers are moved to make room for
* this new buffer.
*
* A -1 value for @idx will append the buffer at the end.
*/
void
gst_buffer_list_insert (GstBufferList * list, gint idx, GstBuffer * buffer)
{
guint want_alloc;
g_return_if_fail (GST_IS_BUFFER_LIST (list));
g_return_if_fail (buffer != NULL);
g_return_if_fail (gst_buffer_list_is_writable (list));
if (idx == -1 && list->n_buffers < list->n_allocated) {
list->buffers[list->n_buffers++] = buffer;
return;
}
if (idx == -1 || idx > list->n_buffers)
idx = list->n_buffers;
want_alloc = list->n_buffers + 1;
if (want_alloc > list->n_allocated) {
want_alloc = MAX (GST_ROUND_UP_16 (want_alloc), list->n_allocated * 2);
if (GST_BUFFER_LIST_IS_USING_DYNAMIC_ARRAY (list)) {
list->buffers = g_renew (GstBuffer *, list->buffers, want_alloc);
} else {
/**
* gst_buffer_list_length:
* @list: a #GstBufferList
*
* Returns the number of buffers in @list.
*
* Returns: the number of buffers in the buffer list
*/
guint
gst_buffer_list_length (GstBufferList * list)
{
g_return_val_if_fail (GST_IS_BUFFER_LIST (list), 0);
return list->n_buffers;
}
/**
* gst_buffer_list_get:
* @list: a #GstBufferList
* @idx: the index
*
* Get the buffer at @idx.
*
* Returns: (transfer none) (nullable): the buffer at @idx in @group
* or %NULL when there is no buffer. The buffer remains valid as
* long as @list is valid and buffer is not removed from the list.
*/
GstBuffer *
gst_buffer_list_get (GstBufferList * list, guint idx)
{
g_return_val_if_fail (GST_IS_BUFFER_LIST (list), NULL);
g_return_val_if_fail (idx < list->n_buffers, NULL);
return list->buffers[idx];
}
/**
* gst_proxy_pad_chain_list_default:
* @pad: a sink #GstPad, returns GST_FLOW_ERROR if not.
* @parent: the parent of @pad or NULL
* @list: (transfer full): the #GstBufferList to send, return GST_FLOW_ERROR
* if not.
*
* Invoke the default chain list function of the proxy pad.
*
* Returns: a #GstFlowReturn from the pad.
*/
GstFlowReturn
gst_proxy_pad_chain_list_default (GstPad * pad, GstObject * parent,
GstBufferList * list)
{
GstFlowReturn res;
GstPad *internal;
g_return_val_if_fail (GST_IS_PROXY_PAD (pad), GST_FLOW_ERROR);
g_return_val_if_fail (GST_IS_BUFFER_LIST (list), GST_FLOW_ERROR);
internal = GST_PROXY_PAD_INTERNAL (pad);
res = gst_pad_push_list (internal, list);
return res;
}
/**
* gst_buffer_list_foreach:
* @list: a #GstBufferList
* @func: (scope call): a #GstBufferListFunc to call
* @user_data: (closure): user data passed to @func
*
* Call @func with @data for each buffer in @list.
*
* @func can modify the passed buffer pointer or its contents. The return value
* of @func define if this function returns or if the remaining buffers in
* the list should be skipped.
*
* Returns: %TRUE when @func returned %TRUE for each buffer in @list or when
* @list is empty.
*/
gboolean
gst_buffer_list_foreach (GstBufferList * list, GstBufferListFunc func,
gpointer user_data)
{
guint i, len;
gboolean ret = TRUE;
g_return_val_if_fail (GST_IS_BUFFER_LIST (list), FALSE);
g_return_val_if_fail (func != NULL, FALSE);
len = list->n_buffers;
for (i = 0; i < len;) {
GstBuffer *buf, *buf_ret;
buf = buf_ret = list->buffers[i];
ret = func (&buf_ret, i, user_data);
/* Check if the function changed the buffer */
if (buf != buf_ret) {
if (buf_ret == NULL) {
gst_buffer_list_remove_range_internal (list, i, 1, FALSE);
--len;
} else {
list->buffers[i] = buf_ret;
}
}
if (!ret)
break;
/* If the buffer was not removed by func go to the next buffer */
if (buf_ret != NULL)
i++;
}
return ret;
}
/**
* gst_rtp_buffer_list_validate:
* @list: the buffer list to validate
*
* Check if all RTP packets in the @list are valid using validate_data().
* Use this function to validate an list before using the other functions in
* this module.
*
* Returns: TRUE if @list consists only of valid RTP packets.
*
* Since: 0.10.24
*/
gboolean
gst_rtp_buffer_list_validate (GstBufferList * list)
{
guint16 prev_seqnum = 0;
GstBufferListIterator *it;
guint i = 0;
g_return_val_if_fail (GST_IS_BUFFER_LIST (list), FALSE);
it = gst_buffer_list_iterate (list);
g_return_val_if_fail (it != NULL, FALSE);
/* iterate through all the RTP packets in the list */
while (gst_buffer_list_iterator_next_group (it)) {
GstBuffer *rtpbuf;
GstBuffer *paybuf;
guint8 *packet_header;
guint8 *packet_payload;
guint payload_size;
guint packet_size;
/* each group should consists of 2 buffers: one containing the RTP header
* and the other one the payload, FIXME, relax the requirement of only one
* payload buffer. */
if (gst_buffer_list_iterator_n_buffers (it) != 2)
goto invalid_list;
/* get the RTP header */
rtpbuf = gst_buffer_list_iterator_next (it);
packet_header = GST_BUFFER_DATA (rtpbuf);
if (packet_header == NULL)
goto invalid_list;
/* get the payload */
paybuf = gst_buffer_list_iterator_next (it);
packet_payload = GST_BUFFER_DATA (paybuf);
if (packet_payload == NULL) {
goto invalid_list;
}
payload_size = GST_BUFFER_SIZE (paybuf);
if (payload_size == 0) {
goto invalid_list;
}
/* the size of the RTP packet within the current group */
packet_size = GST_BUFFER_SIZE (rtpbuf) + payload_size;
/* check the sequence number */
if (G_UNLIKELY (i == 0)) {
prev_seqnum = g_ntohs (GST_RTP_HEADER_SEQ (packet_header));
i++;
} else {
if (++prev_seqnum != g_ntohs (GST_RTP_HEADER_SEQ (packet_header)))
goto invalid_list;
}
/* validate packet */
if (!validate_data (packet_header, packet_size, packet_payload,
payload_size)) {
goto invalid_list;
}
}
gst_buffer_list_iterator_free (it);
return TRUE;
/* ERRORS */
invalid_list:
{
gst_buffer_list_iterator_free (it);
return FALSE;
}
}
