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Original commit message from CVS: * gst-libs/gst/rtp/gstrtcpbuffer.c: (gst_rtcp_packet_sdes_get_entry), (gst_rtcp_packet_sdes_copy_entry): * gst-libs/gst/rtp/gstrtcpbuffer.h: Fix and document SDES item data function. Add new function that makes a proper copy of SDES item data. API: gst_rtcp_packet_sdes_copy_entry()
238 lines
8.8 KiB
C
238 lines
8.8 KiB
C
/* GStreamer
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* Copyright (C) <2007> Wim Taymans <wim@fluendo.com>
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*
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* gstrtcpbuffer.h: various helper functions to manipulate buffers
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* with RTCP payload.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_RTCPBUFFER_H__
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#define __GST_RTCPBUFFER_H__
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#include <gst/gst.h>
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G_BEGIN_DECLS
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/**
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* GST_RTCP_VERSION:
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*
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* The supported RTCP version 2.
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*/
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#define GST_RTCP_VERSION 2
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/**
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* GstRTCPType:
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* @GST_RTCP_TYPE_INVALID: Invalid type
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* @GST_RTCP_TYPE_SR: Sender report
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* @GST_RTCP_TYPE_RR: Receiver report
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* @GST_RTCP_TYPE_SDES: Source description
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* @GST_RTCP_TYPE_BYE: Goodbye
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* @GST_RTCP_TYPE_APP: Application defined
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*
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* Different RTCP packet types.
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*/
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typedef enum
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{
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GST_RTCP_TYPE_INVALID = 0,
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GST_RTCP_TYPE_SR = 200,
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GST_RTCP_TYPE_RR = 201,
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GST_RTCP_TYPE_SDES = 202,
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GST_RTCP_TYPE_BYE = 203,
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GST_RTCP_TYPE_APP = 204
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} GstRTCPType;
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/**
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* GstRTCPSDESType:
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* @GST_RTCP_SDES_INVALID: Invalid SDES entry
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* @GST_RTCP_SDES_END: End of SDES list
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* @GST_RTCP_SDES_CNAME: Canonical name
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* @GST_RTCP_SDES_NAME: User name
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* @GST_RTCP_SDES_EMAIL: User's electronic mail address
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* @GST_RTCP_SDES_PHONE: User's phone number
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* @GST_RTCP_SDES_LOC: Geographic user location
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* @GST_RTCP_SDES_TOOL: Name of application or tool
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* @GST_RTCP_SDES_NOTE: Notice about the source
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* @GST_RTCP_SDES_PRIV: Private extensions
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*
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* Different types of SDES content.
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*/
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typedef enum
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{
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GST_RTCP_SDES_INVALID = -1,
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GST_RTCP_SDES_END = 0,
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GST_RTCP_SDES_CNAME = 1,
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GST_RTCP_SDES_NAME = 2,
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GST_RTCP_SDES_EMAIL = 3,
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GST_RTCP_SDES_PHONE = 4,
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GST_RTCP_SDES_LOC = 5,
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GST_RTCP_SDES_TOOL = 6,
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GST_RTCP_SDES_NOTE = 7,
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GST_RTCP_SDES_PRIV = 8
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} GstRTCPSDESType;
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/**
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* GST_RTCP_MAX_SDES:
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*
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* The maximum text length for an SDES item.
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*/
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#define GST_RTCP_MAX_SDES 255
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/**
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* GST_RTCP_MAX_RB_COUNT:
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*
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* The maximum amount of Receiver report blocks in RR and SR messages.
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*/
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#define GST_RTCP_MAX_RB_COUNT 31
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/**
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* GST_RTCP_MAX_SDES_ITEM_COUNT:
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*
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* The maximum amount of SDES items.
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*/
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#define GST_RTCP_MAX_SDES_ITEM_COUNT 31
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/**
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* GST_RTCP_MAX_BYE_SSRC_COUNT:
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*
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* The maximum amount of SSRCs in a BYE packet.
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*/
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#define GST_RTCP_MAX_BYE_SSRC_COUNT 31
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/**
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* GST_RTCP_VALID_MASK:
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*
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* Mask for version, padding bit and packet type pair
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*/
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#define GST_RTCP_VALID_MASK (0xc000 | 0x2000 | 0xfe)
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/**
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* GST_RTCP_VALID_VALUE:
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*
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* Valid value for the first two bytes of an RTCP packet after applying
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* #GST_RTCP_VALID_MASK to them.
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*/
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#define GST_RTCP_VALID_VALUE ((GST_RTCP_VERSION << 14) | GST_RTCP_TYPE_SR)
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typedef struct _GstRTCPPacket GstRTCPPacket;
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/**
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* GstRTCPPacket:
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* @buffer: pointer to RTCP buffer
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* @offset: offset of packet in buffer data
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*
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* Data structure that points to a packet at @offset in @buffer.
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* The size of the structure is made public to allow stack allocations.
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*/
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struct _GstRTCPPacket
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{
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GstBuffer *buffer;
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guint offset;
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/*< private >*/
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gboolean padding; /* padding field of current packet */
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guint8 count; /* count field of current packet */
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GstRTCPType type; /* type of current packet */
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guint16 length; /* length of current packet in 32-bits words */
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guint item_offset; /* current item offset for navigating SDES */
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guint item_count; /* current item count */
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guint entry_offset; /* current entry offset for navigating SDES items */
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};
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/* creating buffers */
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GstBuffer* gst_rtcp_buffer_new_take_data (gpointer data, guint len);
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GstBuffer* gst_rtcp_buffer_new_copy_data (gpointer data, guint len);
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gboolean gst_rtcp_buffer_validate_data (guint8 *data, guint len);
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gboolean gst_rtcp_buffer_validate (GstBuffer *buffer);
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GstBuffer* gst_rtcp_buffer_new (guint mtu);
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void gst_rtcp_buffer_end (GstBuffer *buffer);
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/* adding/retrieving packets */
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guint gst_rtcp_buffer_get_packet_count (GstBuffer *buffer);
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gboolean gst_rtcp_buffer_get_first_packet (GstBuffer *buffer, GstRTCPPacket *packet);
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gboolean gst_rtcp_packet_move_to_next (GstRTCPPacket *packet);
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gboolean gst_rtcp_buffer_add_packet (GstBuffer *buffer, GstRTCPType type,
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GstRTCPPacket *packet);
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void gst_rtcp_packet_remove (GstRTCPPacket *packet);
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/* working with packets */
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gboolean gst_rtcp_packet_get_padding (GstRTCPPacket *packet);
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guint8 gst_rtcp_packet_get_count (GstRTCPPacket *packet);
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GstRTCPType gst_rtcp_packet_get_type (GstRTCPPacket *packet);
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guint16 gst_rtcp_packet_get_length (GstRTCPPacket *packet);
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/* sender reports */
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void gst_rtcp_packet_sr_get_sender_info (GstRTCPPacket *packet, guint32 *ssrc,
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guint64 *ntptime, guint32 *rtptime,
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guint32 *packet_count, guint32 *octet_count);
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void gst_rtcp_packet_sr_set_sender_info (GstRTCPPacket *packet, guint32 ssrc,
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guint64 ntptime, guint32 rtptime,
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guint32 packet_count, guint32 octet_count);
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/* receiver reports */
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guint32 gst_rtcp_packet_rr_get_ssrc (GstRTCPPacket *packet);
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void gst_rtcp_packet_rr_set_ssrc (GstRTCPPacket *packet, guint32 ssrc);
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/* report blocks for SR and RR */
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guint gst_rtcp_packet_get_rb_count (GstRTCPPacket *packet);
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void gst_rtcp_packet_get_rb (GstRTCPPacket *packet, guint nth, guint32 *ssrc,
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guint8 *fractionlost, gint32 *packetslost,
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guint32 *exthighestseq, guint32 *jitter,
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guint32 *lsr, guint32 *dlsr);
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gboolean gst_rtcp_packet_add_rb (GstRTCPPacket *packet, guint32 ssrc,
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guint8 fractionlost, gint32 packetslost,
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guint32 exthighestseq, guint32 jitter,
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guint32 lsr, guint32 dlsr);
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void gst_rtcp_packet_set_rb (GstRTCPPacket *packet, guint nth, guint32 ssrc,
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guint8 fractionlost, gint32 packetslost,
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guint32 exthighestseq, guint32 jitter,
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guint32 lsr, guint32 dlsr);
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/* source description packet */
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guint gst_rtcp_packet_sdes_get_item_count (GstRTCPPacket *packet);
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gboolean gst_rtcp_packet_sdes_first_item (GstRTCPPacket *packet);
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gboolean gst_rtcp_packet_sdes_next_item (GstRTCPPacket *packet);
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guint32 gst_rtcp_packet_sdes_get_ssrc (GstRTCPPacket *packet);
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gboolean gst_rtcp_packet_sdes_first_entry (GstRTCPPacket *packet);
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gboolean gst_rtcp_packet_sdes_next_entry (GstRTCPPacket *packet);
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gboolean gst_rtcp_packet_sdes_get_entry (GstRTCPPacket *packet,
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GstRTCPSDESType *type, guint8 *len,
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guint8 **data);
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gboolean gst_rtcp_packet_sdes_copy_entry (GstRTCPPacket *packet,
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GstRTCPSDESType *type, guint8 *len,
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guint8 **data);
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gboolean gst_rtcp_packet_sdes_add_item (GstRTCPPacket *packet, guint32 ssrc);
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gboolean gst_rtcp_packet_sdes_add_entry (GstRTCPPacket *packet, GstRTCPSDESType type,
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guint8 len, const guint8 *data);
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/* bye packet */
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guint gst_rtcp_packet_bye_get_ssrc_count (GstRTCPPacket *packet);
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guint32 gst_rtcp_packet_bye_get_nth_ssrc (GstRTCPPacket *packet, guint nth);
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gboolean gst_rtcp_packet_bye_add_ssrc (GstRTCPPacket *packet, guint32 ssrc);
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gboolean gst_rtcp_packet_bye_add_ssrcs (GstRTCPPacket *packet, guint32 *ssrc, guint len);
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guint8 gst_rtcp_packet_bye_get_reason_len (GstRTCPPacket *packet);
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gchar* gst_rtcp_packet_bye_get_reason (GstRTCPPacket *packet);
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gboolean gst_rtcp_packet_bye_set_reason (GstRTCPPacket *packet, const gchar *reason);
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G_END_DECLS
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#endif /* __GST_RTCPBUFFER_H__ */
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