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FFmpeg/libavformat/asf.h

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  1. /*

  2.  * Copyright (c) 2000, 2001 Fabrice Bellard.

  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 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

  17.  */

  18. #define PACKET_SIZE 3200

  19. 

  20. typedef struct {

  21.     int num;

  22.     unsigned char seq;

  23.     /* use for reading */

  24.     AVPacket pkt;

  25.     int frag_offset;

  26.     int timestamp;

  27.     int64_t duration;

  28. 

  29.     int ds_span;		/* descrambling  */

  30.     int ds_packet_size;

  31.     int ds_chunk_size;

  32.     int ds_data_size;

  33.     int ds_silence_data;

  34.     

  35.     int packet_pos;

  36. 

  37. } ASFStream;

  38. 

  39. typedef struct {

  40.     uint32_t v1;

  41.     uint16_t v2;

  42.     uint16_t v3;

  43.     uint8_t v4[8];

  44. } GUID;

  45. 

  46. typedef struct {

  47.     GUID guid;			// generated by client computer

  48.     uint64_t file_size;		// in bytes

  49.                                 // invalid if broadcasting

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

  51.                                 // invalid if broadcasting

  52.     uint64_t packets_count;	// how many packets are there in the file

  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 - substract 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.     /* non streamed additonnal info */

  87.     int64_t nb_packets;

  88.     int64_t duration; /* in 100ns units */

  89.     /* packet filling */

  90.     unsigned char multi_payloads_present;

  91.     int packet_size_left;

  92.     int prev_packet_sent_time;

  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; /* begining of the first data packet */

  101. 

  102.     ASFMainHeader hdr;

  103. 

  104.     int packet_flags;

  105.     int packet_property;

  106.     int packet_timestamp;

  107.     int packet_segsizetype;

  108.     int packet_segments;

  109.     int packet_seq;

  110.     int packet_replic_size;

  111.     int packet_key_frame;

  112.     int packet_padsize;

  113.     int packet_frag_offset;

  114.     int packet_frag_size;

  115.     int packet_frag_timestamp;

  116.     int packet_multi_size;

  117.     int packet_obj_size;

  118.     int packet_time_delta;

  119.     int packet_time_start;

  120.     int packet_pos;

  121. 

  122.     int stream_index;

  123. 

  124. 

  125.     int64_t last_indexed_pts;

  126.     ASFIndex* index_ptr;

  127.     uint32_t nb_index_count;

  128.     uint32_t nb_index_memory_alloc;

  129.     uint16_t maximum_packet;

  130. 

  131.     ASFStream* asf_st; /* currently decoded stream */

  132. } ASFContext;

  133. 

  134. static const GUID asf_header = {

  135.     0x75B22630, 0x668E, 0x11CF, { 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C },

  136. };

  137. 

  138. static const GUID file_header = {

  139.     0x8CABDCA1, 0xA947, 0x11CF, { 0x8E, 0xE4, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 },

  140. };

  141. 

  142. static const GUID stream_header = {

  143.     0xB7DC0791, 0xA9B7, 0x11CF, { 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 },

  144. };

  145. 

  146. static const GUID audio_stream = {

  147.     0xF8699E40, 0x5B4D, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },

  148. };

  149. 

  150. static const GUID audio_conceal_none = {

  151.     // 0x49f1a440, 0x4ece, 0x11d0, { 0xa3, 0xac, 0x00, 0xa0, 0xc9, 0x03, 0x48, 0xf6 },

  152.     // New value lifted from avifile

  153.     0x20fb5700, 0x5b55, 0x11cf, { 0xa8, 0xfd, 0x00, 0x80, 0x5f, 0x5c, 0x44, 0x2b },

  154. };

  155. 

  156. static const GUID audio_conceal_spread = {

  157.      0xBFC3CD50, 0x618F, 0x11CF, { 0x8B, 0xB2, 0x00, 0xAA, 0x00, 0xB4, 0xE2, 0x20 },

  158. };

  159. 

  160. static const GUID video_stream = {

  161.     0xBC19EFC0, 0x5B4D, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },

  162. };

  163. 

  164. static const GUID video_conceal_none = {

  165.     0x20FB5700, 0x5B55, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },

  166. };

  167. 

  168. static const GUID command_stream = {

  169.     0x59DACFC0, 0x59E6, 0x11D0, { 0xA3, 0xAC, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 },

  170. };

  171. 

  172. static const GUID comment_header = {

  173.     0x75b22633, 0x668e, 0x11cf, { 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c },

  174. };

  175. 

  176. static const GUID codec_comment_header = {

  177.     0x86D15240, 0x311D, 0x11D0, { 0xA3, 0xA4, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 },

  178. };

  179. static const GUID codec_comment1_header = {

  180.     0x86d15241, 0x311d, 0x11d0, { 0xa3, 0xa4, 0x00, 0xa0, 0xc9, 0x03, 0x48, 0xf6 },

  181. };

  182. 

  183. static const GUID data_header = {

  184.     0x75b22636, 0x668e, 0x11cf, { 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c },

  185. };

  186. 

  187. static const GUID head1_guid = {

  188.     0x5fbf03b5, 0xa92e, 0x11cf, { 0x8e, 0xe3, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65 },

  189. };

  190. 

  191. static const GUID head2_guid = {

  192.     0xabd3d211, 0xa9ba, 0x11cf, { 0x8e, 0xe6, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65 },

  193. };

  194. 

  195. static const GUID extended_content_header = {

  196.         0xD2D0A440, 0xE307, 0x11D2, { 0x97, 0xF0, 0x00, 0xA0, 0xC9, 0x5E, 0xA8, 0x50 },

  197. };

  198. 

  199. static const GUID simple_index_header = {

  200.         0x33000890, 0xE5B1, 0x11CF, { 0x89, 0xF4, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xCB },

  201. };

  202. 

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

  204.    generate the stream */

  205. static const GUID my_guid = {

  206.     0, 0, 0, { 0, 0, 0, 0, 0, 0, 0, 0 },

  207. };

  208. 

  209. #define ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT 0x80 //1000 0000

  210. 

  211. 

  212. //   ASF data packet structure

  213. //   =========================

  214. //

  215. //

  216. //  -----------------------------------

  217. // | Error Correction Data             |  Optional

  218. //  -----------------------------------

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

  220. //  -----------------------------------

  221. // | Payload Data                      |

  222. //  -----------------------------------

  223. // | Padding Data                      |

  224. //  -----------------------------------

  225. 

  226. 

  227. // PPI_FLAG - Payload parsing information flags

  228. #define ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT 1

  229. 

  230. #define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_BYTE  0x02 //0000 0010

  231. #define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_WORD  0x04 //0000 0100

  232. #define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_DWORD 0x06 //0000 0110

  233. #define ASF_PPI_MASK_SEQUENCE_FIELD_SIZE     0x06 //0000 0110

  234. 

  235. #define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE  0x08 //0000 1000

  236. #define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD  0x10 //0001 0000

  237. #define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_DWORD 0x18 //0001 1000

  238. #define ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE     0x18 //0001 1000

  239. 

  240. #define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_BYTE  0x20 //0010 0000

  241. #define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_WORD  0x40 //0100 0000

  242. #define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_DWORD 0x60 //0110 0000

  243. #define ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE     0x60 //0110 0000

  244. 

  245. // PL_FLAG - Payload flags

  246. #define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE   0x01 //0000 0001

  247. #define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_WORD   0x02 //0000 0010

  248. #define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_DWORD  0x03 //0000 0011

  249. #define ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE      0x03 //0000 0011

  250. 

  251. #define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_BYTE  0x04 //0000 0100

  252. #define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_WORD  0x08 //0000 1000

  253. #define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD 0x0c //0000 1100

  254. #define ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE     0x0c //0000 1100

  255. 

  256. #define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE  0x10 //0001 0000

  257. #define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_WORD  0x20 //0010 0000

  258. #define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_DWORD 0x30 //0011 0000

  259. #define ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE     0x30 //0011 0000

  260. 

  261. #define ASF_PL_FLAG_STREAM_NUMBER_LENGTH_FIELD_IS_BYTE  0x40 //0100 0000

  262. #define ASF_PL_MASK_STREAM_NUMBER_LENGTH_FIELD_SIZE     0xc0 //1100 0000

  263. 

  264. #define ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_BYTE  0x40 //0100 0000

  265. #define ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD  0x80 //1000 0000

  266. #define ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE     0xc0 //1100 0000

  267. 

  268. #define ASF_PL_FLAG_KEY_FRAME 0x80 //1000 0000