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 FFMPEG_ASF_H
  22 #define FFMPEG_ASF_H
  23
  24 #include <stdint.h>
  25 #include "avformat.h"
  26
  27 #define PACKET_SIZE 3200
  28
  29 typedef struct {
  30     int num;
  31     unsigned char seq;
  32     /* use for reading */
  33     AVPacket pkt;
  34     int frag_offset;
  35     int timestamp;
  36     int64_t duration;
  37
  38     int ds_span;                /* descrambling  */
  39     int ds_packet_size;
  40     int ds_chunk_size;
  41
  42     int64_t packet_pos;
  43
  44 } ASFStream;
  45
  46 typedef uint8_t GUID[16];
  47
  48 typedef struct {
  49     GUID guid;                  ///< generated by client computer
  50     uint64_t file_size;         /**< in bytes
  51                                  *   invalid if broadcasting */
  52     uint64_t create_time;       /**< time of creation, in 100-nanosecond units since 1.1.1601
  53                                  *   invalid if broadcasting */
  54     uint64_t play_time;         /**< play time, in 100-nanosecond units
  55                                  * invalid if broadcasting */
  56     uint64_t send_time;         /**< time to send file, in 100-nanosecond units
  57                                  *   invalid if broadcasting (could be ignored) */
  58     uint32_t preroll;           /**< timestamp of the first packet, in milliseconds
  59                                  *   if nonzero - subtract from time */
  60     uint32_t ignore;            ///< preroll is 64bit - but let's just ignore it
  61     uint32_t flags;             /**< 0x01 - broadcast
  62                                  *   0x02 - seekable
  63                                  *   rest is reserved should be 0 */
  64     uint32_t min_pktsize;       /**< size of a data packet
  65                                  *   invalid if broadcasting */
  66     uint32_t max_pktsize;       /**< shall be the same as for min_pktsize
  67                                  *   invalid if broadcasting */
  68     uint32_t max_bitrate;       /**< bandwith of stream in bps
  69                                  *   should be the sum of bitrates of the
  70                                  *   individual media streams */
  71 } ASFMainHeader;
  72
  73
  74 typedef struct {
  75     uint32_t packet_number;
  76     uint16_t packet_count;
  77 } ASFIndex;
  78
  79
  80 typedef struct {
  81     uint32_t seqno;
  82     unsigned int packet_size;
  83     int is_streamed;
  84     int asfid2avid[128];                 ///< conversion table from asf ID 2 AVStream ID
  85     ASFStream streams[128];              ///< it's max number and it's not that big
  86     uint32_t stream_bitrates[128];       ///< max number of streams, bitrate for each (for streaming)
  87     /* non streamed additonnal info */
  88     uint64_t nb_packets;                 ///< how many packets are there in the file, invalid if broadcasting
  89     int64_t duration;                    ///< in 100ns units
  90     /* packet filling */
  91     unsigned char multi_payloads_present;
  92     int packet_size_left;
  93     int packet_timestamp_start;
  94     int packet_timestamp_end;
  95     unsigned int packet_nb_payloads;
  96     int packet_nb_frames;
  97     uint8_t packet_buf[PACKET_SIZE];
  98     ByteIOContext pb;
  99     /* only for reading */
 100     uint64_t data_offset;                ///< beginning of the first data packet
 101     uint64_t data_object_offset;         ///< data object offset (excl. GUID & size)
 102     uint64_t data_object_size;           ///< size of the data object
 103     int index_read;
 104
 105     ASFMainHeader hdr;
 106
 107     int packet_flags;
 108     int packet_property;
 109     int packet_timestamp;
 110     int packet_segsizetype;
 111     int packet_segments;
 112     int packet_seq;
 113     int packet_replic_size;
 114     int packet_key_frame;
 115     int packet_padsize;
 116     unsigned int packet_frag_offset;
 117     unsigned int packet_frag_size;
 118     int64_t packet_frag_timestamp;
 119     int packet_multi_size;
 120     int packet_obj_size;
 121     int packet_time_delta;
 122     int packet_time_start;
 123     int64_t packet_pos;
 124
 125     int stream_index;
 126
 127
 128     int64_t last_indexed_pts;
 129     ASFIndex* index_ptr;
 130     uint32_t nb_index_count;
 131     uint32_t nb_index_memory_alloc;
 132     uint16_t maximum_packet;
 133
 134     ASFStream* asf_st;                   ///< currently decoded stream
 135 } ASFContext;
 136
 137 static const GUID asf_header = {
 138     0x30, 0x26, 0xB2, 0x75, 0x8E, 0x66, 0xCF, 0x11, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C
 139 };
 140
 141 static const GUID file_header = {
 142     0xA1, 0xDC, 0xAB, 0x8C, 0x47, 0xA9, 0xCF, 0x11, 0x8E, 0xE4, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65
 143 };
 144
 145 static const GUID stream_header = {
 146     0x91, 0x07, 0xDC, 0xB7, 0xB7, 0xA9, 0xCF, 0x11, 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65
 147 };
 148
 149 static const GUID ext_stream_header = {
 150     0xCB, 0xA5, 0xE6, 0x14, 0x72, 0xC6, 0x32, 0x43, 0x83, 0x99, 0xA9, 0x69, 0x52, 0x06, 0x5B, 0x5A
 151 };
 152
 153 static const GUID audio_stream = {
 154     0x40, 0x9E, 0x69, 0xF8, 0x4D, 0x5B, 0xCF, 0x11, 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B
 155 };
 156
 157 static const GUID audio_conceal_none = {
 158     // 0x40, 0xa4, 0xf1, 0x49, 0x4ece, 0x11d0, 0xa3, 0xac, 0x00, 0xa0, 0xc9, 0x03, 0x48, 0xf6
 159     // New value lifted from avifile
 160     0x00, 0x57, 0xfb, 0x20, 0x55, 0x5B, 0xCF, 0x11, 0xa8, 0xfd, 0x00, 0x80, 0x5f, 0x5c, 0x44, 0x2b
 161 };
 162
 163 static const GUID audio_conceal_spread = {
 164      0x50, 0xCD, 0xC3, 0xBF, 0x8F, 0x61, 0xCF, 0x11, 0x8B, 0xB2, 0x00, 0xAA, 0x00, 0xB4, 0xE2, 0x20
 165 };
 166
 167 static const GUID video_stream = {
 168     0xC0, 0xEF, 0x19, 0xBC, 0x4D, 0x5B, 0xCF, 0x11, 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B
 169 };
 170
 171 static const GUID video_conceal_none = {
 172     0x00, 0x57, 0xFB, 0x20, 0x55, 0x5B, 0xCF, 0x11, 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B
 173 };
 174
 175 static const GUID command_stream = {
 176     0xC0, 0xCF, 0xDA, 0x59, 0xE6, 0x59, 0xD0, 0x11, 0xA3, 0xAC, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6
 177 };
 178
 179 static const GUID comment_header = {
 180     0x33, 0x26, 0xb2, 0x75, 0x8E, 0x66, 0xCF, 0x11, 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c
 181 };
 182
 183 static const GUID codec_comment_header = {
 184     0x40, 0x52, 0xD1, 0x86, 0x1D, 0x31, 0xD0, 0x11, 0xA3, 0xA4, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6
 185 };
 186 static const GUID codec_comment1_header = {
 187     0x41, 0x52, 0xd1, 0x86, 0x1D, 0x31, 0xD0, 0x11, 0xa3, 0xa4, 0x00, 0xa0, 0xc9, 0x03, 0x48, 0xf6
 188 };
 189
 190 static const GUID data_header = {
 191     0x36, 0x26, 0xb2, 0x75, 0x8E, 0x66, 0xCF, 0x11, 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c
 192 };
 193
 194 static const GUID head1_guid = {
 195     0xb5, 0x03, 0xbf, 0x5f, 0x2E, 0xA9, 0xCF, 0x11, 0x8e, 0xe3, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65
 196 };
 197
 198 static const GUID head2_guid = {
 199     0x11, 0xd2, 0xd3, 0xab, 0xBA, 0xA9, 0xCF, 0x11, 0x8e, 0xe6, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65
 200 };
 201
 202 static const GUID extended_content_header = {
 203         0x40, 0xA4, 0xD0, 0xD2, 0x07, 0xE3, 0xD2, 0x11, 0x97, 0xF0, 0x00, 0xA0, 0xC9, 0x5E, 0xA8, 0x50
 204 };
 205
 206 static const GUID simple_index_header = {
 207         0x90, 0x08, 0x00, 0x33, 0xB1, 0xE5, 0xCF, 0x11, 0x89, 0xF4, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xCB
 208 };
 209
 210 static const GUID ext_stream_embed_stream_header = {
 211         0xe2, 0x65, 0xfb, 0x3a, 0xEF, 0x47, 0xF2, 0x40, 0xac, 0x2c, 0x70, 0xa9, 0x0d, 0x71, 0xd3, 0x43
 212 };
 213
 214 static const GUID ext_stream_audio_stream = {
 215         0x9d, 0x8c, 0x17, 0x31, 0xE1, 0x03, 0x28, 0x45, 0xb5, 0x82, 0x3d, 0xf9, 0xdb, 0x22, 0xf5, 0x03
 216 };
 217
 218 static const GUID metadata_header = {
 219         0xea, 0xcb, 0xf8, 0xc5, 0xaf, 0x5b, 0x77, 0x48, 0x84, 0x67, 0xaa, 0x8c, 0x44, 0xfa, 0x4c, 0xca
 220 };
 221
 222 /* I am not a number !!! This GUID is the one found on the PC used to
 223    generate the stream */
 224 static const GUID my_guid = {
 225     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
 226 };
 227
 228 #define ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT 0x80 //1000 0000
 229
 230
 231 //   ASF data packet structure
 232 //   =========================
 233 //
 234 //
 235 //  -----------------------------------
 236 // | Error Correction Data             |  Optional
 237 //  -----------------------------------
 238 // | Payload Parsing Information (PPI) |
 239 //  -----------------------------------
 240 // | Payload Data                      |
 241 //  -----------------------------------
 242 // | Padding Data                      |
 243 //  -----------------------------------
 244
 245
 246 // PPI_FLAG - Payload parsing information flags
 247 #define ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT 1
 248
 249 #define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_BYTE  0x02 //0000 0010
 250 #define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_WORD  0x04 //0000 0100
 251 #define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_DWORD 0x06 //0000 0110
 252 #define ASF_PPI_MASK_SEQUENCE_FIELD_SIZE     0x06 //0000 0110
 253
 254 #define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE  0x08 //0000 1000
 255 #define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD  0x10 //0001 0000
 256 #define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_DWORD 0x18 //0001 1000
 257 #define ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE     0x18 //0001 1000
 258
 259 #define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_BYTE  0x20 //0010 0000
 260 #define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_WORD  0x40 //0100 0000
 261 #define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_DWORD 0x60 //0110 0000
 262 #define ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE     0x60 //0110 0000
 263
 264 // PL_FLAG - Payload flags
 265 #define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE   0x01 //0000 0001
 266 #define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_WORD   0x02 //0000 0010
 267 #define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_DWORD  0x03 //0000 0011
 268 #define ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE      0x03 //0000 0011
 269
 270 #define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_BYTE  0x04 //0000 0100
 271 #define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_WORD  0x08 //0000 1000
 272 #define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD 0x0c //0000 1100
 273 #define ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE     0x0c //0000 1100
 274
 275 #define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE  0x10 //0001 0000
 276 #define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_WORD  0x20 //0010 0000
 277 #define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_DWORD 0x30 //0011 0000
 278 #define ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE     0x30 //0011 0000
 279
 280 #define ASF_PL_FLAG_STREAM_NUMBER_LENGTH_FIELD_IS_BYTE  0x40 //0100 0000
 281 #define ASF_PL_MASK_STREAM_NUMBER_LENGTH_FIELD_SIZE     0xc0 //1100 0000
 282
 283 #define ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_BYTE  0x40 //0100 0000
 284 #define ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD  0x80 //1000 0000
 285 #define ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE     0xc0 //1100 0000
 286
 287 #define ASF_PL_FLAG_KEY_FRAME 0x80 //1000 0000
 288
 289 #endif /* FFMPEG_ASF_H */