/* GStreamer * Copyright (C) <2007> Wim Taymans * * gstrtcpbuffer.h: various helper functions to manipulate buffers * with RTCP 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., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ #ifndef __GST_RTCPBUFFER_H__ #define __GST_RTCPBUFFER_H__ #include G_BEGIN_DECLS /** * GST_RTCP_VERSION: * * The supported RTCP version 2. */ #define GST_RTCP_VERSION 2 /** * GstRTCPType: * @GST_RTCP_TYPE_INVALID: Invalid type * @GST_RTCP_TYPE_SR: Sender report * @GST_RTCP_TYPE_RR: Receiver report * @GST_RTCP_TYPE_SDES: Source description * @GST_RTCP_TYPE_BYE: Goodbye * @GST_RTCP_TYPE_APP: Application defined * @GST_RTCP_TYPE_RTPFB: Transport layer feedback. * @GST_RTCP_TYPE_PSFB: Payload-specific feedback. * * Different RTCP packet types. */ typedef enum { GST_RTCP_TYPE_INVALID = 0, GST_RTCP_TYPE_SR = 200, GST_RTCP_TYPE_RR = 201, GST_RTCP_TYPE_SDES = 202, GST_RTCP_TYPE_BYE = 203, GST_RTCP_TYPE_APP = 204, GST_RTCP_TYPE_RTPFB = 205, GST_RTCP_TYPE_PSFB = 206 } GstRTCPType; /** * GstRTCPFBType: * @GST_RTCP_FB_TYPE_INVALID: Invalid type * @GST_RTCP_RTPFB_TYPE_NACK: Generic NACK * @GST_RTCP_RTPFB_TYPE_TMMBR: Temporary Maximum Media Stream Bit Rate Request * @GST_RTCP_RTPFB_TYPE_TMMBN: Temporary Maximum Media Stream Bit Rate * Notification * @GST_RTCP_PSFB_TYPE_PLI: Picture Loss Indication * @GST_RTCP_PSFB_TYPE_SLI: Slice Loss Indication * @GST_RTCP_PSFB_TYPE_RPSI: Reference Picture Selection Indication * @GST_RTCP_PSFB_TYPE_AFB: Application layer Feedback * @GST_RTCP_PSFB_TYPE_FIR: Full Intra Request Command * @GST_RTCP_PSFB_TYPE_TSTR: Temporal-Spatial Trade-off Request * @GST_RTCP_PSFB_TYPE_TSTN: Temporal-Spatial Trade-off Notification * @GST_RTCP_PSFB_TYPE_VBCN: Video Back Channel Message * * Different types of feedback messages. */ typedef enum { /* generic */ GST_RTCP_FB_TYPE_INVALID = 0, /* RTPFB types */ GST_RTCP_RTPFB_TYPE_NACK = 1, /* RTPFB types assigned in RFC 5104 */ GST_RTCP_RTPFB_TYPE_TMMBR = 3, GST_RTCP_RTPFB_TYPE_TMMBN = 4, /* PSFB types */ GST_RTCP_PSFB_TYPE_PLI = 1, GST_RTCP_PSFB_TYPE_SLI = 2, GST_RTCP_PSFB_TYPE_RPSI = 3, GST_RTCP_PSFB_TYPE_AFB = 15, /* PSFB types assigned in RFC 5104 */ GST_RTCP_PSFB_TYPE_FIR = 4, GST_RTCP_PSFB_TYPE_TSTR = 5, GST_RTCP_PSFB_TYPE_TSTN = 6, GST_RTCP_PSFB_TYPE_VBCN = 7, } GstRTCPFBType; /** * GstRTCPSDESType: * @GST_RTCP_SDES_INVALID: Invalid SDES entry * @GST_RTCP_SDES_END: End of SDES list * @GST_RTCP_SDES_CNAME: Canonical name * @GST_RTCP_SDES_NAME: User name * @GST_RTCP_SDES_EMAIL: User's electronic mail address * @GST_RTCP_SDES_PHONE: User's phone number * @GST_RTCP_SDES_LOC: Geographic user location * @GST_RTCP_SDES_TOOL: Name of application or tool * @GST_RTCP_SDES_NOTE: Notice about the source * @GST_RTCP_SDES_PRIV: Private extensions * * Different types of SDES content. */ typedef enum { GST_RTCP_SDES_INVALID = -1, GST_RTCP_SDES_END = 0, GST_RTCP_SDES_CNAME = 1, GST_RTCP_SDES_NAME = 2, GST_RTCP_SDES_EMAIL = 3, GST_RTCP_SDES_PHONE = 4, GST_RTCP_SDES_LOC = 5, GST_RTCP_SDES_TOOL = 6, GST_RTCP_SDES_NOTE = 7, GST_RTCP_SDES_PRIV = 8 } GstRTCPSDESType; /** * GST_RTCP_MAX_SDES: * * The maximum text length for an SDES item. */ #define GST_RTCP_MAX_SDES 255 /** * GST_RTCP_MAX_RB_COUNT: * * The maximum amount of Receiver report blocks in RR and SR messages. */ #define GST_RTCP_MAX_RB_COUNT 31 /** * GST_RTCP_MAX_SDES_ITEM_COUNT: * * The maximum amount of SDES items. */ #define GST_RTCP_MAX_SDES_ITEM_COUNT 31 /** * GST_RTCP_MAX_BYE_SSRC_COUNT: * * The maximum amount of SSRCs in a BYE packet. */ #define GST_RTCP_MAX_BYE_SSRC_COUNT 31 /** * GST_RTCP_VALID_MASK: * * Mask for version, padding bit and packet type pair */ #define GST_RTCP_VALID_MASK (0xc000 | 0x2000 | 0xfe) /** * GST_RTCP_VALID_VALUE: * * Valid value for the first two bytes of an RTCP packet after applying * #GST_RTCP_VALID_MASK to them. */ #define GST_RTCP_VALID_VALUE ((GST_RTCP_VERSION << 14) | GST_RTCP_TYPE_SR) typedef struct _GstRTCPBuffer GstRTCPBuffer; typedef struct _GstRTCPPacket GstRTCPPacket; struct _GstRTCPBuffer { GstBuffer *buffer; GstMapInfo map; }; #define GST_RTCP_BUFFER_INIT { NULL, GST_MAP_INFO_INIT } /** * GstRTCPPacket: * @rtcp: pointer to RTCP buffer * @offset: offset of packet in buffer data * * Data structure that points to a packet at @offset in @buffer. * The size of the structure is made public to allow stack allocations. */ struct _GstRTCPPacket { GstRTCPBuffer *rtcp; guint offset; /*< private >*/ gboolean padding; /* padding field of current packet */ guint8 count; /* count field of current packet */ GstRTCPType type; /* type of current packet */ guint16 length; /* length of current packet in 32-bits words */ guint item_offset; /* current item offset for navigating SDES */ guint item_count; /* current item count */ guint entry_offset; /* current entry offset for navigating SDES items */ }; /* creating buffers */ GstBuffer* gst_rtcp_buffer_new_take_data (gpointer data, guint len); GstBuffer* gst_rtcp_buffer_new_copy_data (gpointer data, guint len); gboolean gst_rtcp_buffer_validate_data (guint8 *data, guint len); gboolean gst_rtcp_buffer_validate (GstBuffer *buffer); GstBuffer* gst_rtcp_buffer_new (guint mtu); gboolean gst_rtcp_buffer_map (GstBuffer *buffer, GstMapFlags flags, GstRTCPBuffer *rtcp); gboolean gst_rtcp_buffer_unmap (GstRTCPBuffer *rtcp); /* adding/retrieving packets */ guint gst_rtcp_buffer_get_packet_count (GstRTCPBuffer *rtcp); gboolean gst_rtcp_buffer_get_first_packet (GstRTCPBuffer *rtcp, GstRTCPPacket *packet); gboolean gst_rtcp_packet_move_to_next (GstRTCPPacket *packet); gboolean gst_rtcp_buffer_add_packet (GstRTCPBuffer *rtcp, GstRTCPType type, GstRTCPPacket *packet); gboolean gst_rtcp_packet_remove (GstRTCPPacket *packet); /* working with packets */ gboolean gst_rtcp_packet_get_padding (GstRTCPPacket *packet); guint8 gst_rtcp_packet_get_count (GstRTCPPacket *packet); GstRTCPType gst_rtcp_packet_get_type (GstRTCPPacket *packet); guint16 gst_rtcp_packet_get_length (GstRTCPPacket *packet); /* sender reports */ void gst_rtcp_packet_sr_get_sender_info (GstRTCPPacket *packet, guint32 *ssrc, guint64 *ntptime, guint32 *rtptime, guint32 *packet_count, guint32 *octet_count); void gst_rtcp_packet_sr_set_sender_info (GstRTCPPacket *packet, guint32 ssrc, guint64 ntptime, guint32 rtptime, guint32 packet_count, guint32 octet_count); /* receiver reports */ guint32 gst_rtcp_packet_rr_get_ssrc (GstRTCPPacket *packet); void gst_rtcp_packet_rr_set_ssrc (GstRTCPPacket *packet, guint32 ssrc); /* report blocks for SR and RR */ guint gst_rtcp_packet_get_rb_count (GstRTCPPacket *packet); void gst_rtcp_packet_get_rb (GstRTCPPacket *packet, guint nth, guint32 *ssrc, guint8 *fractionlost, gint32 *packetslost, guint32 *exthighestseq, guint32 *jitter, guint32 *lsr, guint32 *dlsr); gboolean gst_rtcp_packet_add_rb (GstRTCPPacket *packet, guint32 ssrc, guint8 fractionlost, gint32 packetslost, guint32 exthighestseq, guint32 jitter, guint32 lsr, guint32 dlsr); void gst_rtcp_packet_set_rb (GstRTCPPacket *packet, guint nth, guint32 ssrc, guint8 fractionlost, gint32 packetslost, guint32 exthighestseq, guint32 jitter, guint32 lsr, guint32 dlsr); /* source description packet */ guint gst_rtcp_packet_sdes_get_item_count (GstRTCPPacket *packet); gboolean gst_rtcp_packet_sdes_first_item (GstRTCPPacket *packet); gboolean gst_rtcp_packet_sdes_next_item (GstRTCPPacket *packet); guint32 gst_rtcp_packet_sdes_get_ssrc (GstRTCPPacket *packet); gboolean gst_rtcp_packet_sdes_first_entry (GstRTCPPacket *packet); gboolean gst_rtcp_packet_sdes_next_entry (GstRTCPPacket *packet); gboolean gst_rtcp_packet_sdes_get_entry (GstRTCPPacket *packet, GstRTCPSDESType *type, guint8 *len, guint8 **data); gboolean gst_rtcp_packet_sdes_copy_entry (GstRTCPPacket *packet, GstRTCPSDESType *type, guint8 *len, guint8 **data); gboolean gst_rtcp_packet_sdes_add_item (GstRTCPPacket *packet, guint32 ssrc); gboolean gst_rtcp_packet_sdes_add_entry (GstRTCPPacket *packet, GstRTCPSDESType type, guint8 len, const guint8 *data); /* bye packet */ guint gst_rtcp_packet_bye_get_ssrc_count (GstRTCPPacket *packet); guint32 gst_rtcp_packet_bye_get_nth_ssrc (GstRTCPPacket *packet, guint nth); gboolean gst_rtcp_packet_bye_add_ssrc (GstRTCPPacket *packet, guint32 ssrc); gboolean gst_rtcp_packet_bye_add_ssrcs (GstRTCPPacket *packet, guint32 *ssrc, guint len); guint8 gst_rtcp_packet_bye_get_reason_len (GstRTCPPacket *packet); gchar* gst_rtcp_packet_bye_get_reason (GstRTCPPacket *packet); gboolean gst_rtcp_packet_bye_set_reason (GstRTCPPacket *packet, const gchar *reason); /* feedback packets */ guint32 gst_rtcp_packet_fb_get_sender_ssrc (GstRTCPPacket *packet); void gst_rtcp_packet_fb_set_sender_ssrc (GstRTCPPacket *packet, guint32 ssrc); guint32 gst_rtcp_packet_fb_get_media_ssrc (GstRTCPPacket *packet); void gst_rtcp_packet_fb_set_media_ssrc (GstRTCPPacket *packet, guint32 ssrc); GstRTCPFBType gst_rtcp_packet_fb_get_type (GstRTCPPacket *packet); void gst_rtcp_packet_fb_set_type (GstRTCPPacket *packet, GstRTCPFBType type); guint16 gst_rtcp_packet_fb_get_fci_length (GstRTCPPacket *packet); gboolean gst_rtcp_packet_fb_set_fci_length (GstRTCPPacket *packet, guint16 wordlen); guint8 * gst_rtcp_packet_fb_get_fci (GstRTCPPacket *packet); /* helper functions */ guint64 gst_rtcp_ntp_to_unix (guint64 ntptime); guint64 gst_rtcp_unix_to_ntp (guint64 unixtime); const gchar * gst_rtcp_sdes_type_to_name (GstRTCPSDESType type); GstRTCPSDESType gst_rtcp_sdes_name_to_type (const gchar *name); G_END_DECLS #endif /* __GST_RTCPBUFFER_H__ */