/**
* 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;
}
/**
* 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;
}
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;
}
EXPORT_C
#endif
void
gst_rtp_buffer_set_extension (GstBuffer * buffer, gboolean extension)
{
GST_RTP_HEADER_EXTENSION (GST_BUFFER_DATA (buffer)) = extension;
}
EXPORT_C
#endif
gboolean
gst_rtp_buffer_get_extension (GstBuffer * buffer)
{
return GST_RTP_HEADER_EXTENSION (GST_BUFFER_DATA (buffer));
}
EXPORT_C
#endif
void
gst_rtp_buffer_set_extension (GstBuffer * buffer, gboolean extension)
{
g_return_if_fail (GST_IS_BUFFER (buffer));
g_return_if_fail (GST_BUFFER_DATA (buffer) != NULL);
GST_RTP_HEADER_EXTENSION (buffer) = extension;
}
EXPORT_C
#endif
gboolean
gst_rtp_buffer_get_extension (GstBuffer * buffer)
{
g_return_val_if_fail (GST_IS_BUFFER (buffer), FALSE);
g_return_val_if_fail (GST_BUFFER_DATA (buffer) != NULL, FALSE);
return GST_RTP_HEADER_EXTENSION (buffer);
}
/**
* 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;
}
