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FFmpeg/libavformat/asf.h

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  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. #define PACKET_SIZE 3200

  21. 

  22. typedef struct {

  23.     int num;

  24.     unsigned char seq;

  25.     /* use for reading */

  26.     AVPacket pkt;

  27.     int frag_offset;

  28.     int timestamp;

  29.     int64_t duration;

  30. 

  31.     int ds_span;                /* descrambling  */

  32.     int ds_packet_size;

  33.     int ds_chunk_size;

  34. 

  35.     int64_t packet_pos;

  36. 

  37. } ASFStream;

  38. 

  39. typedef uint8_t GUID[16];

  40. 

  41. typedef struct {

  42.     GUID guid;                  ///< generated by client computer

  43.     uint64_t file_size;         /**< in bytes

  44.                                  *   invalid if broadcasting */

  45.     uint64_t create_time;       /**< time of creation, in 100-nanosecond units since 1.1.1601

  46.                                  *   invalid if broadcasting */

  47.     uint64_t play_time;         /**< play time, in 100-nanosecond units

  48.                                  * invalid if broadcasting */

  49.     uint64_t send_time;         /**< time to send file, in 100-nanosecond units

  50.                                  *   invalid if broadcasting (could be ignored) */

  51.     uint32_t preroll;           /**< timestamp of the first packet, in milliseconds

  52.                                  *   if nonzero - substract from time */

  53.     uint32_t ignore;            ///< preroll is 64bit - but let's just ignore it

  54.     uint32_t flags;             /**< 0x01 - broadcast

  55.                                  *   0x02 - seekable

  56.                                  *   rest is reserved should be 0 */

  57.     uint32_t min_pktsize;       /**< size of a data packet

  58.                                  *   invalid if broadcasting */

  59.     uint32_t max_pktsize;       /**< shall be the same as for min_pktsize

  60.                                  *   invalid if broadcasting */

  61.     uint32_t max_bitrate;       /**< bandwith of stream in bps

  62.                                  *   should be the sum of bitrates of the

  63.                                  *   individual media streams */

  64. } ASFMainHeader;

  65. 

  66. 

  67. typedef struct {

  68.     uint32_t packet_number;

  69.     uint16_t packet_count;

  70. } ASFIndex;

  71. 

  72. 

  73. typedef struct {

  74.     uint32_t seqno;

  75.     unsigned int packet_size;

  76.     int is_streamed;

  77.     int asfid2avid[128];                 ///< conversion table from asf ID 2 AVStream ID

  78.     ASFStream streams[128];              ///< it's max number and it's not that big

  79.     uint32_t stream_bitrates[128];       ///< max number of streams, bitrate for each (for streaming)

  80.     /* non streamed additonnal info */

  81.     uint64_t nb_packets;                 ///< how many packets are there in the file, invalid if broadcasting

  82.     int64_t duration;                    ///< in 100ns units

  83.     /* packet filling */

  84.     unsigned char multi_payloads_present;

  85.     int packet_size_left;

  86.     int packet_timestamp_start;

  87.     int packet_timestamp_end;

  88.     unsigned int packet_nb_payloads;

  89.     int packet_nb_frames;

  90.     uint8_t packet_buf[PACKET_SIZE];

  91.     ByteIOContext pb;

  92.     /* only for reading */

  93.     uint64_t data_offset;                ///< begining of the first data packet

  94.     uint64_t data_object_offset;         ///< data object offset (excl. GUID & size)

  95.     uint64_t data_object_size;           ///< size of the data object

  96.     int index_read;

  97. 

  98.     ASFMainHeader hdr;

  99. 

  100.     int packet_flags;

  101.     int packet_property;

  102.     int packet_timestamp;

  103.     int packet_segsizetype;

  104.     int packet_segments;

  105.     int packet_seq;

  106.     int packet_replic_size;

  107.     int packet_key_frame;

  108.     int packet_padsize;

  109.     unsigned int packet_frag_offset;

  110.     unsigned int packet_frag_size;

  111.     int64_t packet_frag_timestamp;

  112.     int packet_multi_size;

  113.     int packet_obj_size;

  114.     int packet_time_delta;

  115.     int packet_time_start;

  116.     int64_t packet_pos;

  117. 

  118.     int stream_index;

  119. 

  120. 

  121.     int64_t last_indexed_pts;

  122.     ASFIndex* index_ptr;

  123.     uint32_t nb_index_count;

  124.     uint32_t nb_index_memory_alloc;

  125.     uint16_t maximum_packet;

  126. 

  127.     ASFStream* asf_st;                   ///< currently decoded stream

  128. } ASFContext;

  129. 

  130. static const GUID asf_header = {

  131.     0x30, 0x26, 0xB2, 0x75, 0x8E, 0x66, 0xCF, 0x11, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C

  132. };

  133. 

  134. static const GUID file_header = {

  135.     0xA1, 0xDC, 0xAB, 0x8C, 0x47, 0xA9, 0xCF, 0x11, 0x8E, 0xE4, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65

  136. };

  137. 

  138. static const GUID stream_header = {

  139.     0x91, 0x07, 0xDC, 0xB7, 0xB7, 0xA9, 0xCF, 0x11, 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65

  140. };

  141. 

  142. static const GUID ext_stream_header = {

  143.     0xCB, 0xA5, 0xE6, 0x14, 0x72, 0xC6, 0x32, 0x43, 0x83, 0x99, 0xA9, 0x69, 0x52, 0x06, 0x5B, 0x5A

  144. };

  145. 

  146. static const GUID audio_stream = {

  147.     0x40, 0x9E, 0x69, 0xF8, 0x4D, 0x5B, 0xCF, 0x11, 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B

  148. };

  149. 

  150. static const GUID audio_conceal_none = {

  151.     // 0x40, 0xa4, 0xf1, 0x49, 0x4ece, 0x11d0, 0xa3, 0xac, 0x00, 0xa0, 0xc9, 0x03, 0x48, 0xf6

  152.     // New value lifted from avifile

  153.     0x00, 0x57, 0xfb, 0x20, 0x55, 0x5B, 0xCF, 0x11, 0xa8, 0xfd, 0x00, 0x80, 0x5f, 0x5c, 0x44, 0x2b

  154. };

  155. 

  156. static const GUID audio_conceal_spread = {

  157.      0x50, 0xCD, 0xC3, 0xBF, 0x8F, 0x61, 0xCF, 0x11, 0x8B, 0xB2, 0x00, 0xAA, 0x00, 0xB4, 0xE2, 0x20

  158. };

  159. 

  160. static const GUID video_stream = {

  161.     0xC0, 0xEF, 0x19, 0xBC, 0x4D, 0x5B, 0xCF, 0x11, 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B

  162. };

  163. 

  164. static const GUID video_conceal_none = {

  165.     0x00, 0x57, 0xFB, 0x20, 0x55, 0x5B, 0xCF, 0x11, 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B

  166. };

  167. 

  168. static const GUID command_stream = {

  169.     0xC0, 0xCF, 0xDA, 0x59, 0xE6, 0x59, 0xD0, 0x11, 0xA3, 0xAC, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6

  170. };

  171. 

  172. static const GUID comment_header = {

  173.     0x33, 0x26, 0xb2, 0x75, 0x8E, 0x66, 0xCF, 0x11, 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c

  174. };

  175. 

  176. static const GUID codec_comment_header = {

  177.     0x40, 0x52, 0xD1, 0x86, 0x1D, 0x31, 0xD0, 0x11, 0xA3, 0xA4, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6

  178. };

  179. static const GUID codec_comment1_header = {

  180.     0x41, 0x52, 0xd1, 0x86, 0x1D, 0x31, 0xD0, 0x11, 0xa3, 0xa4, 0x00, 0xa0, 0xc9, 0x03, 0x48, 0xf6

  181. };

  182. 

  183. static const GUID data_header = {

  184.     0x36, 0x26, 0xb2, 0x75, 0x8E, 0x66, 0xCF, 0x11, 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c

  185. };

  186. 

  187. static const GUID head1_guid = {

  188.     0xb5, 0x03, 0xbf, 0x5f, 0x2E, 0xA9, 0xCF, 0x11, 0x8e, 0xe3, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65

  189. };

  190. 

  191. static const GUID head2_guid = {

  192.     0x11, 0xd2, 0xd3, 0xab, 0xBA, 0xA9, 0xCF, 0x11, 0x8e, 0xe6, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65

  193. };

  194. 

  195. static const GUID extended_content_header = {

  196.         0x40, 0xA4, 0xD0, 0xD2, 0x07, 0xE3, 0xD2, 0x11, 0x97, 0xF0, 0x00, 0xA0, 0xC9, 0x5E, 0xA8, 0x50

  197. };

  198. 

  199. static const GUID simple_index_header = {

  200.         0x90, 0x08, 0x00, 0x33, 0xB1, 0xE5, 0xCF, 0x11, 0x89, 0xF4, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xCB

  201. };

  202. 

  203. static const GUID ext_stream_embed_stream_header = {

  204.         0xe2, 0x65, 0xfb, 0x3a, 0xEF, 0x47, 0xF2, 0x40, 0xac, 0x2c, 0x70, 0xa9, 0x0d, 0x71, 0xd3, 0x43

  205. };

  206. 

  207. static const GUID ext_stream_audio_stream = {

  208.         0x9d, 0x8c, 0x17, 0x31, 0xE1, 0x03, 0x28, 0x45, 0xb5, 0x82, 0x3d, 0xf9, 0xdb, 0x22, 0xf5, 0x03

  209. };

  210. 

  211. static const GUID metadata_header = {

  212.         0xea, 0xcb, 0xf8, 0xc5, 0xaf, 0x5b, 0x77, 0x48, 0x84, 0x67, 0xaa, 0x8c, 0x44, 0xfa, 0x4c, 0xca

  213. };

  214. 

  215. /* I am not a number !!! This GUID is the one found on the PC used to

  216.    generate the stream */

  217. static const GUID my_guid = {

  218.     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0

  219. };

  220. 

  221. #define ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT 0x80 //1000 0000

  222. 

  223. 

  224. //   ASF data packet structure

  225. //   =========================

  226. //

  227. //

  228. //  -----------------------------------

  229. // | Error Correction Data             |  Optional

  230. //  -----------------------------------

  231. // | Payload Parsing Information (PPI) |

  232. //  -----------------------------------

  233. // | Payload Data                      |

  234. //  -----------------------------------

  235. // | Padding Data                      |

  236. //  -----------------------------------

  237. 

  238. 

  239. // PPI_FLAG - Payload parsing information flags

  240. #define ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT 1

  241. 

  242. #define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_BYTE  0x02 //0000 0010

  243. #define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_WORD  0x04 //0000 0100

  244. #define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_DWORD 0x06 //0000 0110

  245. #define ASF_PPI_MASK_SEQUENCE_FIELD_SIZE     0x06 //0000 0110

  246. 

  247. #define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE  0x08 //0000 1000

  248. #define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD  0x10 //0001 0000

  249. #define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_DWORD 0x18 //0001 1000

  250. #define ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE     0x18 //0001 1000

  251. 

  252. #define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_BYTE  0x20 //0010 0000

  253. #define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_WORD  0x40 //0100 0000

  254. #define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_DWORD 0x60 //0110 0000

  255. #define ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE     0x60 //0110 0000

  256. 

  257. // PL_FLAG - Payload flags

  258. #define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE   0x01 //0000 0001

  259. #define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_WORD   0x02 //0000 0010

  260. #define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_DWORD  0x03 //0000 0011

  261. #define ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE      0x03 //0000 0011

  262. 

  263. #define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_BYTE  0x04 //0000 0100

  264. #define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_WORD  0x08 //0000 1000

  265. #define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD 0x0c //0000 1100

  266. #define ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE     0x0c //0000 1100

  267. 

  268. #define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE  0x10 //0001 0000

  269. #define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_WORD  0x20 //0010 0000

  270. #define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_DWORD 0x30 //0011 0000

  271. #define ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE     0x30 //0011 0000

  272. 

  273. #define ASF_PL_FLAG_STREAM_NUMBER_LENGTH_FIELD_IS_BYTE  0x40 //0100 0000

  274. #define ASF_PL_MASK_STREAM_NUMBER_LENGTH_FIELD_SIZE     0xc0 //1100 0000

  275. 

  276. #define ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_BYTE  0x40 //0100 0000

  277. #define ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD  0x80 //1000 0000

  278. #define ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE     0xc0 //1100 0000

  279. 

  280. #define ASF_PL_FLAG_KEY_FRAME 0x80 //1000 0000