src/add-ons/media/plugins/asf_reader/libasf/asfint.h

   1 /*  libasf - An Advanced Systems Format media file parser
   2  *  Copyright (C) 2006-2010 Juho Vähä-Herttua
   3  *
   4  *  This library is free software; you can redistribute it and/or
   5  *  modify it under the terms of the GNU Lesser General Public
   6  *  License as published by the Free Software Foundation; either
   7  *  version 2.1 of the License, or (at your option) any later version.
   8  *
   9  *  This library is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  12  *  Lesser General Public License for more details.
  13  *
  14  *  You should have received a copy of the GNU Lesser General Public
  15  *  License along with this library; if not, write to the Free Software
  16  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17  */
  18
  19 #ifndef ASFINT_H
  20 #define ASFINT_H
  21
  22 #include <string.h>
  23
  24 #include "asf.h"
  25 #include "guid.h"
  26 #include "compat.h"
  27
  28 static INLINE void
  29 GetGUID(const void *pointer, asf_guid_t *guid)
  30 {
  31         const uint8_t *data = pointer;
  32         guid->v1 = GetDWLE(data);
  33         guid->v2 = GetWLE(data + 4);
  34         guid->v3 = GetWLE(data + 6);
  35         memcpy(guid->v4, data + 8, 8);
  36 }
  37
  38 #define GETLEN2b(bits) (((bits) == 0x03) ? 4 : bits)
  39 #define GETVALUE2b(bits, data) \
  40         (((bits) != 0x03) ? ((bits) != 0x02) ? ((bits) != 0x01) ? \
  41         0 : *((uint8_t *)data) : GetWLE(data) : GetDWLE(data))
  42
  43
  44
  45 /* DO NOT MODIFY THE FIRST 3 VARIABLES, BECAUSE THEY ARE
  46  * ALSO DEFINED IN asf.h HEADER AND WILL BREAK THINGS */
  47 #define ASF_OBJECT_COMMON        \
  48         asf_guid_t   guid;       \
  49         uint64_t     size;       \
  50         uint8_t      *full_data; \
  51         uint64_t     datalen;    \
  52         uint8_t      *data;      \
  53         guid_type_t  type;       \
  54         struct asfint_object_s *next;
  55
  56 struct asfint_object_s {
  57         ASF_OBJECT_COMMON
  58 };
  59 typedef struct asfint_object_s asfint_object_t;
  60
  61 struct asf_object_headerext_s {
  62         ASF_OBJECT_COMMON
  63         asf_guid_t   reserved1;
  64         uint16_t     reserved2;
  65         struct asfint_object_s *first;
  66         struct asfint_object_s *last;
  67 };
  68 typedef struct asf_object_headerext_s asf_object_headerext_t;
  69
  70 struct asf_object_header_s {
  71         ASF_OBJECT_COMMON
  72         uint16_t     subobjects;
  73         uint8_t      reserved1; /* 0x01, but could be safely ignored */
  74         uint8_t      reserved2; /* 0x02, if not must failed to source the contain */
  75         asf_object_headerext_t *ext; /* this is here just for convenience */
  76         struct asfint_object_s    *first;
  77         struct asfint_object_s    *last;
  78 };
  79 typedef struct asf_object_header_s asf_object_header_t;
  80
  81 struct asf_object_data_s {
  82         ASF_OBJECT_COMMON
  83         asf_guid_t file_id;
  84         uint64_t   total_data_packets;
  85         uint16_t   reserved;
  86         uint64_t   packets_position;
  87 };
  88 typedef struct asf_object_data_s asf_object_data_t;
  89
  90 struct asf_index_entry_s {
  91         uint32_t packet_index;
  92         uint16_t packet_count;
  93 };
  94 typedef struct asf_index_entry_s asf_index_entry_t;
  95
  96 struct asf_object_index_s {
  97         ASF_OBJECT_COMMON
  98         asf_guid_t file_id;
  99         uint64_t   entry_time_interval;
 100         uint32_t   max_packet_count;
 101         uint32_t   entry_count;
 102         asf_index_entry_t *entries;
 103 };
 104 typedef struct asf_object_index_s asf_object_index_t;
 105
 106 #define ASF_FLAG_BROADCAST 1
 107 #define ASF_FLAG_SEEKABLE  2
 108
 109 #define ASF_MAX_STREAMS 128
 110
 111 struct asf_file_s {
 112         const char *filename;
 113         asf_iostream_t iostream;
 114
 115         uint64_t position;
 116         uint64_t packet;
 117
 118         /* Top level objects */
 119         struct asf_object_header_s *header;
 120         struct asf_object_data_s   *data;
 121         struct asf_object_index_s  *index;
 122
 123         /* position (in bytes) of data and index objects */
 124         uint64_t data_position;
 125         uint64_t index_position;
 126
 127         asf_guid_t file_id;
 128         uint64_t   file_size;
 129         uint64_t   creation_date;
 130         uint64_t   data_packets_count;
 131         uint64_t   play_duration;
 132         uint64_t   send_duration;
 133         uint64_t   preroll;
 134         uint16_t   flags;
 135         uint32_t   packet_size;
 136         uint32_t   max_bitrate;
 137
 138         asf_stream_t streams[ASF_MAX_STREAMS];
 139 };
 140
 141 #endif