/* GStreamer
* Copyright (C) <2005> Philippe Khalaf <burger@speedy.org>
* <2005> Wim Taymans <wim@fluendo.com>
*
* gstrtpbuffer.h: various helper functions to manipulate buffers
* with RTP payload.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_RTPBUFFER_H__
#define __GST_RTPBUFFER_H__
#include <gst/gst.h>
#include <gst/rtp/gstrtppayloads.h>
G_BEGIN_DECLS
/**
* GST_RTP_VERSION:
*
* The supported RTP version 2.
*/
#define GST_RTP_VERSION 2
typedef struct _GstRTPBuffer GstRTPBuffer;
/**
* GstRTPBuffer:
* @buffer: pointer to RTP buffer
* @state: internal state
* @data: array of data
* @size: array of size
* @map: array of #GstMapInfo
*
* Data structure that points to an RTP packet.
* The size of the structure is made public to allow stack allocations.
*/
struct _GstRTPBuffer
{
GstBuffer *buffer;
guint state;
gpointer data[4];
gsize size[4];
GstMapInfo map[4];
};
#define GST_RTP_BUFFER_INIT { NULL, 0, { NULL, NULL, NULL, NULL}, { 0, 0, 0, 0 }, \
{ GST_MAP_INFO_INIT, GST_MAP_INFO_INIT, GST_MAP_INFO_INIT, GST_MAP_INFO_INIT} }
/* creating buffers */
GST_RTP_API
void gst_rtp_buffer_allocate_data (GstBuffer *buffer, guint payload_len,
guint8 pad_len, guint8 csrc_count);
GST_RTP_API
GstBuffer* gst_rtp_buffer_new_take_data (gpointer data, gsize len);
GST_RTP_API
GstBuffer* gst_rtp_buffer_new_copy_data (gconstpointer data, gsize len);
GST_RTP_API
GstBuffer* gst_rtp_buffer_new_allocate (guint payload_len, guint8 pad_len, guint8 csrc_count);
GST_RTP_API
GstBuffer* gst_rtp_buffer_new_allocate_len (guint packet_len, guint8 pad_len, guint8 csrc_count);
GST_RTP_API
guint gst_rtp_buffer_calc_header_len (guint8 csrc_count);
GST_RTP_API
guint gst_rtp_buffer_calc_packet_len (guint payload_len, guint8 pad_len, guint8 csrc_count);
GST_RTP_API
guint gst_rtp_buffer_calc_payload_len (guint packet_len, guint8 pad_len, guint8 csrc_count);
GST_RTP_API
gboolean gst_rtp_buffer_map (GstBuffer *buffer, GstMapFlags flags, GstRTPBuffer *rtp);
GST_RTP_API
void gst_rtp_buffer_unmap (GstRTPBuffer *rtp);
GST_RTP_API
void gst_rtp_buffer_set_packet_len (GstRTPBuffer *rtp, guint len);
GST_RTP_API
guint gst_rtp_buffer_get_packet_len (GstRTPBuffer *rtp);
GST_RTP_API
guint gst_rtp_buffer_get_header_len (GstRTPBuffer *rtp);
GST_RTP_API
guint8 gst_rtp_buffer_get_version (GstRTPBuffer *rtp);
GST_RTP_API
void gst_rtp_buffer_set_version (GstRTPBuffer *rtp, guint8 version);
GST_RTP_API
gboolean gst_rtp_buffer_get_padding (GstRTPBuffer *rtp);
GST_RTP_API
void gst_rtp_buffer_set_padding (GstRTPBuffer *rtp, gboolean padding);
GST_RTP_API
void gst_rtp_buffer_pad_to (GstRTPBuffer *rtp, guint len);
GST_RTP_API
gboolean gst_rtp_buffer_get_extension (GstRTPBuffer *rtp);
GST_RTP_API
void gst_rtp_buffer_set_extension (GstRTPBuffer *rtp, gboolean extension);
GST_RTP_API
gboolean gst_rtp_buffer_get_extension_data (GstRTPBuffer *rtp, guint16 *bits,
gpointer *data, guint *wordlen);
GST_RTP_API
GBytes* gst_rtp_buffer_get_extension_bytes (GstRTPBuffer *rtp, guint16 *bits);
GST_RTP_API
gboolean gst_rtp_buffer_set_extension_data (GstRTPBuffer *rtp, guint16 bits, guint16 length);
GST_RTP_API
guint32 gst_rtp_buffer_get_ssrc (GstRTPBuffer *rtp);
GST_RTP_API
void gst_rtp_buffer_set_ssrc (GstRTPBuffer *rtp, guint32 ssrc);
GST_RTP_API
guint8 gst_rtp_buffer_get_csrc_count (GstRTPBuffer *rtp);
GST_RTP_API
guint32 gst_rtp_buffer_get_csrc (GstRTPBuffer *rtp, guint8 idx);
GST_RTP_API
void gst_rtp_buffer_set_csrc (GstRTPBuffer *rtp, guint8 idx, guint32 csrc);
GST_RTP_API
gboolean gst_rtp_buffer_get_marker (GstRTPBuffer *rtp);
GST_RTP_API
void gst_rtp_buffer_set_marker (GstRTPBuffer *rtp, gboolean marker);
GST_RTP_API
guint8 gst_rtp_buffer_get_payload_type (GstRTPBuffer *rtp);
GST_RTP_API
void gst_rtp_buffer_set_payload_type (GstRTPBuffer *rtp, guint8 payload_type);
GST_RTP_API
guint16 gst_rtp_buffer_get_seq (GstRTPBuffer *rtp);
GST_RTP_API
void gst_rtp_buffer_set_seq (GstRTPBuffer *rtp, guint16 seq);
GST_RTP_API
guint32 gst_rtp_buffer_get_timestamp (GstRTPBuffer *rtp);
GST_RTP_API
void gst_rtp_buffer_set_timestamp (GstRTPBuffer *rtp, guint32 timestamp);
GST_RTP_API
GstBuffer* gst_rtp_buffer_get_payload_buffer (GstRTPBuffer *rtp);
GST_RTP_API
GstBuffer* gst_rtp_buffer_get_payload_subbuffer (GstRTPBuffer *rtp, guint offset, guint len);
GST_RTP_API
guint gst_rtp_buffer_get_payload_len (GstRTPBuffer *rtp);
GST_RTP_API
gpointer gst_rtp_buffer_get_payload (GstRTPBuffer *rtp);
GST_RTP_API
GBytes* gst_rtp_buffer_get_payload_bytes (GstRTPBuffer *rtp);
/* some helpers */
GST_RTP_API
guint32 gst_rtp_buffer_default_clock_rate (guint8 payload_type);
GST_RTP_API
gint gst_rtp_buffer_compare_seqnum (guint16 seqnum1, guint16 seqnum2);
GST_RTP_API
guint64 gst_rtp_buffer_ext_timestamp (guint64 *exttimestamp, guint32 timestamp);
GST_RTP_API
gboolean gst_rtp_buffer_get_extension_onebyte_header (GstRTPBuffer *rtp,
guint8 id,
guint nth,
gpointer * data,
guint * size);
GST_RTP_API
gboolean gst_rtp_buffer_get_extension_twobytes_header (GstRTPBuffer *rtp,
guint8 * appbits,
guint8 id,
guint nth,
gpointer * data,
guint * size);
GST_RTP_API
gboolean gst_rtp_buffer_add_extension_onebyte_header (GstRTPBuffer *rtp,
guint8 id,
gconstpointer data,
guint size);
GST_RTP_API
gboolean gst_rtp_buffer_add_extension_twobytes_header (GstRTPBuffer *rtp,
guint8 appbits,
guint8 id,
gconstpointer data,
guint size);
/**
* GstRTPBufferFlags:
* @GST_RTP_BUFFER_FLAG_RETRANSMISSION: The #GstBuffer was once wrapped
* in a retransmitted packet as specified by RFC 4588.
* @GST_RTP_BUFFER_FLAG_REDUNDANT: The packet represents redundant RTP packet.
* The flag is used in gstrtpstorage to be able to hold the packetback
* and use it only for recovery from packet loss.
* Since: 1.14
* @GST_RTP_BUFFER_FLAG_LAST: Offset to define more flags.
*
* Additional RTP buffer flags. These flags can potentially be used on any
* buffers carrying RTP packets.
*
* Note that these are only valid for #GstCaps of type: application/x-rtp (x-rtcp).
* They can conflict with other extended buffer flags.
*
* Since: 1.10
*/
typedef enum {
GST_RTP_BUFFER_FLAG_RETRANSMISSION = (GST_BUFFER_FLAG_LAST << 0),
GST_RTP_BUFFER_FLAG_REDUNDANT = (GST_BUFFER_FLAG_LAST << 1),
GST_RTP_BUFFER_FLAG_LAST = (GST_BUFFER_FLAG_LAST << 8)
} GstRTPBufferFlags;
/**
* GstRTPBufferMapFlags:
* @GST_RTP_BUFFER_MAP_FLAG_SKIP_PADDING: Skip mapping and validation of RTP
* padding and RTP pad count when present. Useful for buffers where
* the padding may be encrypted.
* @GST_RTP_BUFFER_MAP_FLAG_LAST: Offset to define more flags
*
* Additional mapping flags for gst_rtp_buffer_map().
*
* Since: 1.6.1
*/
typedef enum {
GST_RTP_BUFFER_MAP_FLAG_SKIP_PADDING = (GST_MAP_FLAG_LAST << 0),
GST_RTP_BUFFER_MAP_FLAG_LAST = (GST_MAP_FLAG_LAST << 8)
/* 8 more flags possible afterwards */
} GstRTPBufferMapFlags;
G_END_DECLS
#endif /* __GST_RTPBUFFER_H__ */