include/lib/dvb/lowlevel/avp.h

   1
   2 /*
   3  * Audio Video PES
   4  *
   5  * Copyright (C) 1999  Thomas Mirlacher
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  *
  21  * The author may be reached as dent@cosy.sbg.ac.at, or
  22  * Thomas Mirlacher, Jakob-Haringerstr. 2, A-5020 Salzburg,
  23  * Austria
  24  *
  25  *------------------------------------------------------------
  26  *
  27  */
  28
  29
  30 #ifndef __AVP_H__
  31 #define __AVP_H__
  32
  33 #include <sys/types.h>
  34
  35 typedef struct {
  36         u_char prefix1          :8;     // 'A'
  37         u_char prefix2          :8;     // 'V'
  38         u_char stream_id        :8;     // 0x01 ... Video, 0x02 ... Audio
  39         u_char cont_count       :8;     // continuity counter
  40         u_char reserved         :8;     // 0x55
  41
  42 #if BYTE_ORDER == BIG_ENDIAN
  43         u_char                  :3;
  44         u_char pts_present      :1;     // presentation time stamp
  45         u_char pad_length       :2;     // bytes left for 4 byte pad
  46         u_char pad_length       :2;     // bytes left for 4 byte pad (last pkt)
  47 #else
  48         u_char                  :3;
  49         u_char pts_present      :1;     // presentation time stamp
  50         u_char pad_length       :2;     // bytes left for 4 byte pad
  51         u_char pad_length       :2;     // bytes left for 4 byte pad (last pkt)
  52 #endif
  53
  54         u_char length_hi        :8;     // payload length (high byte)
  55         u_char length_lo        :8;     // payload length (low byte)
  56 } avp_hdr_t;
  57
  58 #define AVP_HDR_LEN 8
  59
  60 #endif