/**
* gst_rtp_buffer_set_extension_data:
* @buffer: the buffer
* @bits: the bits specific for the extension
* @length: the length that counts the number of 32-bit words in
* the extension, excluding the extension header ( therefore zero is a valid length)
*
* Set the extension bit of the rtp buffer and fill in the @bits and @length of the
* extension header. It will refuse to set the extension data if the buffer is not
* large enough.
*
* Returns: True if done.
*
* Since : 0.10.18
*/
gboolean
gst_rtp_buffer_set_extension_data (GstBuffer * buffer, guint16 bits,
guint16 length)
{
guint32 min_size = 0;
guint8 *data;
data = GST_BUFFER_DATA (buffer);
/* check if the buffer is big enough to hold the extension */
min_size =
GST_RTP_HEADER_LEN + GST_RTP_HEADER_CSRC_SIZE (data) + 4 +
length * sizeof (guint32);
if (G_UNLIKELY (min_size > GST_BUFFER_SIZE (buffer)))
goto too_small;
/* now we can set the extension bit */
gst_rtp_buffer_set_extension (buffer, TRUE);
data += GST_RTP_HEADER_LEN + GST_RTP_HEADER_CSRC_SIZE (data);
GST_WRITE_UINT16_BE (data, bits);
GST_WRITE_UINT16_BE (data + 2, length);
return TRUE;
/* ERRORS */
too_small:
{
g_warning
("rtp buffer too small: need more than %d bytes but only have %d bytes",
min_size, GST_BUFFER_SIZE (buffer));
return FALSE;
}
}
EXPORT_C
#endif
gboolean
gst_rtp_buffer_set_extension_data (GstBuffer * buffer, guint16 bits,
guint16 length)
{
guint32 min_size = 0;
guint8 *data;
g_return_val_if_fail (GST_IS_BUFFER (buffer), FALSE);
g_return_val_if_fail (GST_BUFFER_DATA (buffer) != NULL, FALSE);
gst_rtp_buffer_set_extension (buffer, TRUE);
min_size =
GST_RTP_HEADER_LEN + GST_RTP_HEADER_CSRC_SIZE (buffer) + 4 +
length * sizeof (guint32);
if (min_size > GST_BUFFER_SIZE (buffer)) {
GST_WARNING_OBJECT (buffer,
"rtp buffer too small: need more than %d bytes but only have %d bytes",
min_size, GST_BUFFER_SIZE (buffer));
return FALSE;
}
data =
GST_BUFFER_DATA (buffer) + GST_RTP_HEADER_LEN +
GST_RTP_HEADER_CSRC_SIZE (buffer);
GST_WRITE_UINT16_BE (data, bits);
GST_WRITE_UINT16_BE (data + 2, length);
return TRUE;
}
/**
* gst_rtp_buffer_get_extension_data:
* @buffer: the buffer
* @bits: location for result bits
* @data: location for data
* @wordlen: location for length of @data in 32 bits words
*
* Get the extension data. @bits will contain the extension 16 bits of custom
* data. @data will point to the data in the extension and @wordlen will contain
* the length of @data in 32 bits words.
*
* If @buffer did not contain an extension, this function will return %FALSE
* with @bits, @data and @wordlen unchanged.
*
* Returns: TRUE if @buffer had the extension bit set.
*
* Since: 0.10.15
*/
gboolean
gst_rtp_buffer_get_extension_data (GstBuffer * buffer, guint16 * bits,
gpointer * data, guint * wordlen)
{
guint len;
guint8 *pdata;
pdata = GST_BUFFER_DATA (buffer);
if (!GST_RTP_HEADER_EXTENSION (pdata))
return FALSE;
/* move to the extension */
len = GST_RTP_HEADER_LEN + GST_RTP_HEADER_CSRC_SIZE (pdata);
pdata += len;
if (bits)
*bits = GST_READ_UINT16_BE (pdata);
if (wordlen)
*wordlen = GST_READ_UINT16_BE (pdata + 2);
if (data)
*data = pdata + 4;
return TRUE;
}
EXPORT_C
#endif
gboolean
gst_rtp_buffer_get_extension_data (GstBuffer * buffer, guint16 * bits,
gpointer * data, guint * wordlen)
{
guint len;
guint8 *pdata;
g_return_val_if_fail (GST_IS_BUFFER (buffer), FALSE);
g_return_val_if_fail (GST_BUFFER_DATA (buffer) != NULL, FALSE);
if (!GST_RTP_HEADER_EXTENSION (buffer))
return FALSE;
/* move to the extension */
len = GST_RTP_HEADER_LEN + GST_RTP_HEADER_CSRC_SIZE (buffer);
pdata = GST_BUFFER_DATA (buffer) + len;
if (bits)
*bits = GST_READ_UINT16_BE (pdata);
if (wordlen)
*wordlen = GST_READ_UINT16_BE (pdata + 2);
if (data)
*data = pdata + 4;
return TRUE;
}
/**
* gst_rtp_buffer_get_header_len:
* @buffer: the buffer
*
* Return the total length of the header in @buffer. This include the length of
* the fixed header, the CSRC list and the extension header.
*
* Returns: The total length of the header in @buffer.
*/
guint
gst_rtp_buffer_get_header_len (GstBuffer * buffer)
{
guint len;
guint8 *data;
data = GST_BUFFER_DATA (buffer);
len = GST_RTP_HEADER_LEN + GST_RTP_HEADER_CSRC_SIZE (data);
if (GST_RTP_HEADER_EXTENSION (data))
len += GST_READ_UINT16_BE (data + len + 2) * 4 + 4;
return len;
}
EXPORT_C
#endif
guint
gst_rtp_buffer_get_header_len (GstBuffer * buffer)
{
guint len;
g_return_val_if_fail (GST_IS_BUFFER (buffer), 0);
len = GST_RTP_HEADER_LEN + GST_RTP_HEADER_CSRC_SIZE (buffer);
if (GST_RTP_HEADER_EXTENSION (buffer))
len += GST_READ_UINT16_BE (GST_BUFFER_DATA (buffer) + len + 2) * 4 + 4;
return len;
}
