xiph-rtp/xiph_rtp.h

   1 /*
   2   Copyright (c) 2005, Fluendo / Xiph.Org
   3
   4   Redistribution and use in source and binary forms, with or without
   5   modification, are permitted provided that the following conditions are met:
   6
   7   * Redistributions of source code must retain the above copyright notice,
   8     this list of conditions and the following disclaimer.
   9
  10   * Redistributions in binary form must reproduce the above copyright notice,
  11     this list of conditions and the following disclaimer in the documentation
  12     and/or other materials provided with the distribution.
  13
  14   * Neither the name of the Xiph.Org nor the names of its contributors may
  15     be used to endorse or promote products derived from this software without
  16     specific prior written permission.
  17
  18   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  20   TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  21   PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
  22   BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  23   CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  24   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  25   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  26   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  27   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  28   THE POSSIBILITY OF SUCH DAMAGE.
  29
  30   Author: Luca Barbato <lu_zero@gentoo.org>
  31
  32 */
  33
  34 #ifndef XIPH_RTP_H
  35 #define XIPH_RTP_H
  36
  37 /**
  38  * Specific vorbis/theora header
  39  */
  40
  41 typedef struct header_bitfield {
  42     unsigned int cbident:24;
  43     unsigned int frag_type:2;
  44     unsigned int data_type:2;
  45     unsigned int pkts:4;
  46 } header_bitfield_t;
  47
  48 /**
  49  * Standard rtp header
  50  */
  51
  52 typedef struct rtp_headers {
  53 /*  v, p, x, cc flags  */
  54     unsigned int flags1:8;
  55
  56 /*  m, pt flags  */
  57     unsigned int flags2:8;
  58
  59     unsigned int sequence:16;
  60     unsigned int timestamp:32;
  61     unsigned int ssrc:32;
  62 } rtp_headers_t;
  63
  64
  65 typedef struct framestack {
  66         int stacksize;
  67         int stackcount;
  68         unsigned char* framestack;
  69 } framestack_t;
  70
  71
  72 /**
  73  * Context structure for rtp transmission
  74  */
  75
  76 //FIXME restructure with a separate codec struct
  77 typedef struct xiph_rtp {
  78         /* network related */
  79         struct sockaddr_in rtpsock;
  80         int socket;
  81         header_bitfield_t bitfield;
  82         rtp_headers_t headers;
  83         /* rtp related*/
  84         framestack_t fs;
  85         /* stream related */
  86         ogg_sync_state oy;
  87         ogg_stream_state os;
  88         ogg_page og;
  89         ogg_packet op;
  90         ogg_packet header[3];
  91         /* codec generic */
  92         int codec; // 0 = vorbis, 1 = theora, 2 = speex
  93 #ifdef HAVE_VORBIS
  94         /* codec specific (vorbis)*/
  95         vorbis_info vi;
  96         vorbis_comment vc;
  97         vorbis_dsp_state vd;
  98         vorbis_block vb;
  99 #endif
 100 #ifdef HAVE_THEORA
 101         /* codec specific (theora)*/
 102         theora_info      ti;
 103         theora_comment   tc;
 104         theora_state     td;
 105         unsigned int gp_shift;
 106 #endif
 107         /* codec specific (speex) */
 108         //FIXME
 109
 110 } xiph_rtp_t;
 111
 112 int createsocket (xiph_rtp_t *xr, char *addr, unsigned int port,
 113                   unsigned char TTL);
 114
 115 void creatertp (xiph_rtp_t *xr, unsigned char* vorbdata, int length,
 116                 long timestamp, long sleeptime, int type, int last);
 117
 118 int sendrtp (xiph_rtp_t *xr, const void *data, int len);
 119
 120 int makeheader (xiph_rtp_t *xr, unsigned char *packet, int length);
 121
 122 int ogg_copy_packet(ogg_packet *dst, ogg_packet *src);
 123
 124 #endif