ffmpeg/libavformat/asf.h

   1 /*
   2  * Copyright (c) 2000, 2001 Fabrice Bellard
   3  *
   4  * This file is part of FFmpeg.
   5  *
   6  * FFmpeg is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * FFmpeg is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with FFmpeg; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #ifndef AVFORMAT_ASF_H
  22 #define AVFORMAT_ASF_H
  23
  24 #include <stdint.h>
  25 #include "avformat.h"
  26 #include "metadata.h"
  27 #include "riff.h"
  28
  29 #define PACKET_SIZE 3200
  30
  31 typedef struct ASFPayload {
  32     uint8_t type;
  33     uint16_t size;
  34 } ASFPayload;
  35
  36 typedef struct ASFStream {
  37     int num;
  38     unsigned char seq;
  39     /* use for reading */
  40     AVPacket pkt;
  41     int frag_offset;
  42     int packet_obj_size;
  43     int timestamp;
  44     int64_t duration;
  45     int skip_to_key;
  46     int pkt_clean;
  47
  48     int ds_span;                /* descrambling  */
  49     int ds_packet_size;
  50     int ds_chunk_size;
  51
  52     int64_t packet_pos;
  53
  54     uint16_t stream_language_index;
  55
  56     int      palette_changed;
  57     uint32_t palette[256];
  58
  59     int payload_ext_ct;
  60     ASFPayload payload[8];
  61 } ASFStream;
  62
  63 typedef struct ASFMainHeader {
  64     ff_asf_guid guid;                  ///< generated by client computer
  65     uint64_t file_size;         /**< in bytes
  66                                  *   invalid if broadcasting */
  67     uint64_t create_time;       /**< time of creation, in 100-nanosecond units since 1.1.1601
  68                                  *   invalid if broadcasting */
  69     uint64_t play_time;         /**< play time, in 100-nanosecond units
  70                                  * invalid if broadcasting */
  71     uint64_t send_time;         /**< time to send file, in 100-nanosecond units
  72                                  *   invalid if broadcasting (could be ignored) */
  73     uint32_t preroll;           /**< timestamp of the first packet, in milliseconds
  74                                  *   if nonzero - subtract from time */
  75     uint32_t ignore;            ///< preroll is 64bit - but let's just ignore it
  76     uint32_t flags;             /**< 0x01 - broadcast
  77                                  *   0x02 - seekable
  78                                  *   rest is reserved should be 0 */
  79     uint32_t min_pktsize;       /**< size of a data packet
  80                                  *   invalid if broadcasting */
  81     uint32_t max_pktsize;       /**< shall be the same as for min_pktsize
  82                                  *   invalid if broadcasting */
  83     uint32_t max_bitrate;       /**< bandwidth of stream in bps
  84                                  *   should be the sum of bitrates of the
  85                                  *   individual media streams */
  86 } ASFMainHeader;
  87
  88
  89 typedef struct ASFIndex {
  90     uint32_t packet_number;
  91     uint16_t packet_count;
  92     uint64_t send_time;
  93     uint64_t offset;
  94 } ASFIndex;
  95
  96 extern const ff_asf_guid ff_asf_header;
  97 extern const ff_asf_guid ff_asf_file_header;
  98 extern const ff_asf_guid ff_asf_stream_header;
  99 extern const ff_asf_guid ff_asf_ext_stream_header;
 100 extern const ff_asf_guid ff_asf_audio_stream;
 101 extern const ff_asf_guid ff_asf_audio_conceal_none;
 102 extern const ff_asf_guid ff_asf_audio_conceal_spread;
 103 extern const ff_asf_guid ff_asf_video_stream;
 104 extern const ff_asf_guid ff_asf_jfif_media;
 105 extern const ff_asf_guid ff_asf_video_conceal_none;
 106 extern const ff_asf_guid ff_asf_command_stream;
 107 extern const ff_asf_guid ff_asf_comment_header;
 108 extern const ff_asf_guid ff_asf_codec_comment_header;
 109 extern const ff_asf_guid ff_asf_codec_comment1_header;
 110 extern const ff_asf_guid ff_asf_data_header;
 111 extern const ff_asf_guid ff_asf_head1_guid;
 112 extern const ff_asf_guid ff_asf_head2_guid;
 113 extern const ff_asf_guid ff_asf_extended_content_header;
 114 extern const ff_asf_guid ff_asf_simple_index_header;
 115 extern const ff_asf_guid ff_asf_ext_stream_embed_stream_header;
 116 extern const ff_asf_guid ff_asf_ext_stream_audio_stream;
 117 extern const ff_asf_guid ff_asf_metadata_header;
 118 extern const ff_asf_guid ff_asf_metadata_library_header;
 119 extern const ff_asf_guid ff_asf_marker_header;
 120 extern const ff_asf_guid ff_asf_reserved_4;
 121 extern const ff_asf_guid ff_asf_my_guid;
 122 extern const ff_asf_guid ff_asf_language_guid;
 123 extern const ff_asf_guid ff_asf_content_encryption;
 124 extern const ff_asf_guid ff_asf_ext_content_encryption;
 125 extern const ff_asf_guid ff_asf_digital_signature;
 126
 127 extern const AVMetadataConv ff_asf_metadata_conv[];
 128
 129 #define ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT 0x80 //1000 0000
 130
 131
 132 //   ASF data packet structure
 133 //   =========================
 134 //
 135 //
 136 //  -----------------------------------
 137 // | Error Correction Data             |  Optional
 138 //  -----------------------------------
 139 // | Payload Parsing Information (PPI) |
 140 //  -----------------------------------
 141 // | Payload Data                      |
 142 //  -----------------------------------
 143 // | Padding Data                      |
 144 //  -----------------------------------
 145
 146
 147 // PPI_FLAG - Payload parsing information flags
 148 #define ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT 1
 149
 150 #define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_BYTE  0x02 //0000 0010
 151 #define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_WORD  0x04 //0000 0100
 152 #define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_DWORD 0x06 //0000 0110
 153 #define ASF_PPI_MASK_SEQUENCE_FIELD_SIZE     0x06 //0000 0110
 154
 155 #define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE  0x08 //0000 1000
 156 #define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD  0x10 //0001 0000
 157 #define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_DWORD 0x18 //0001 1000
 158 #define ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE     0x18 //0001 1000
 159
 160 #define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_BYTE  0x20 //0010 0000
 161 #define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_WORD  0x40 //0100 0000
 162 #define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_DWORD 0x60 //0110 0000
 163 #define ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE     0x60 //0110 0000
 164
 165 // PL_FLAG - Payload flags
 166 #define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE   0x01 //0000 0001
 167 #define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_WORD   0x02 //0000 0010
 168 #define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_DWORD  0x03 //0000 0011
 169 #define ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE      0x03 //0000 0011
 170
 171 #define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_BYTE  0x04 //0000 0100
 172 #define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_WORD  0x08 //0000 1000
 173 #define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD 0x0c //0000 1100
 174 #define ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE     0x0c //0000 1100
 175
 176 #define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE  0x10 //0001 0000
 177 #define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_WORD  0x20 //0010 0000
 178 #define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_DWORD 0x30 //0011 0000
 179 #define ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE     0x30 //0011 0000
 180
 181 #define ASF_PL_FLAG_STREAM_NUMBER_LENGTH_FIELD_IS_BYTE  0x40 //0100 0000
 182 #define ASF_PL_MASK_STREAM_NUMBER_LENGTH_FIELD_SIZE     0xc0 //1100 0000
 183
 184 #define ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_BYTE  0x40 //0100 0000
 185 #define ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD  0x80 //1000 0000
 186 #define ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE     0xc0 //1100 0000
 187
 188 #define ASF_PL_FLAG_KEY_FRAME 0x80 //1000 0000
 189
 190 extern AVInputFormat ff_asf_demuxer;
 191
 192 #endif /* AVFORMAT_ASF_H */