/**
* gst_rtp_buffer_allocate_data:
* @buffer: a #GstBuffer
* @payload_len: the length of the payload
* @pad_len: the amount of padding
* @csrc_count: the number of CSRC entries
*
* Allocate enough data in @buffer to hold an RTP packet with @csrc_count CSRCs,
* a payload length of @payload_len and padding of @pad_len.
* MALLOCDATA of @buffer will be overwritten and will not be freed.
* All other RTP header fields will be set to 0/FALSE.
*/
void
gst_rtp_buffer_allocate_data (GstBuffer * buffer, guint payload_len,
guint8 pad_len, guint8 csrc_count)
{
guint len;
guint8 *data;
g_return_if_fail (csrc_count <= 15);
g_return_if_fail (GST_IS_BUFFER (buffer));
len = GST_RTP_HEADER_LEN + csrc_count * sizeof (guint32)
+ payload_len + pad_len;
data = g_malloc (len);
GST_BUFFER_MALLOCDATA (buffer) = data;
GST_BUFFER_DATA (buffer) = data;
GST_BUFFER_SIZE (buffer) = len;
/* fill in defaults */
GST_RTP_HEADER_VERSION (data) = GST_RTP_VERSION;
GST_RTP_HEADER_PADDING (data) = FALSE;
GST_RTP_HEADER_EXTENSION (data) = FALSE;
GST_RTP_HEADER_CSRC_COUNT (data) = csrc_count;
memset (GST_RTP_HEADER_CSRC_LIST_OFFSET (data, 0), 0,
csrc_count * sizeof (guint32));
GST_RTP_HEADER_MARKER (data) = FALSE;
GST_RTP_HEADER_PAYLOAD_TYPE (data) = 0;
GST_RTP_HEADER_SEQ (data) = 0;
GST_RTP_HEADER_TIMESTAMP (data) = 0;
GST_RTP_HEADER_SSRC (data) = 0;
}
/**
* gst_rtp_buffer_set_csrc:
* @buffer: the buffer
* @idx: the CSRC index to set
* @csrc: the CSRC in host order to set at @idx
*
* Modify the CSRC at index @idx in @buffer to @csrc.
*/
void
gst_rtp_buffer_set_csrc (GstBuffer * buffer, guint8 idx, guint32 csrc)
{
guint8 *data;
data = GST_BUFFER_DATA (buffer);
g_return_if_fail (idx < GST_RTP_HEADER_CSRC_COUNT (data));
GST_WRITE_UINT32_BE (GST_RTP_HEADER_CSRC_LIST_OFFSET (data, idx), csrc);
}
/**
* gst_rtp_buffer_get_csrc:
* @buffer: the buffer
* @idx: the index of the CSRC to get
*
* Get the CSRC at index @idx in @buffer.
*
* Returns: the CSRC at index @idx in host order.
*/
guint32
gst_rtp_buffer_get_csrc (GstBuffer * buffer, guint8 idx)
{
guint8 *data;
data = GST_BUFFER_DATA (buffer);
g_return_val_if_fail (idx < GST_RTP_HEADER_CSRC_COUNT (data), 0);
return GST_READ_UINT32_BE (GST_RTP_HEADER_CSRC_LIST_OFFSET (data, idx));
}
EXPORT_C
#endif
void
gst_rtp_buffer_set_csrc (GstBuffer * buffer, guint8 idx, guint32 csrc)
{
g_return_if_fail (GST_IS_BUFFER (buffer));
g_return_if_fail (GST_BUFFER_DATA (buffer) != NULL);
g_return_if_fail (idx < GST_RTP_HEADER_CSRC_COUNT (buffer));
GST_WRITE_UINT32_BE (GST_RTP_HEADER_CSRC_LIST_OFFSET (buffer, idx), csrc);
}
EXPORT_C
#endif
guint32
gst_rtp_buffer_get_csrc (GstBuffer * buffer, guint8 idx)
{
g_return_val_if_fail (GST_IS_BUFFER (buffer), 0);
g_return_val_if_fail (GST_BUFFER_DATA (buffer) != NULL, 0);
g_return_val_if_fail (idx < GST_RTP_HEADER_CSRC_COUNT (buffer), 0);
return GST_READ_UINT32_BE (GST_RTP_HEADER_CSRC_LIST_OFFSET (buffer, idx));
}
