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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. 

  21. #ifndef AVFORMAT_ASF_H

  22. #define AVFORMAT_ASF_H

  23. 

  24. #include <stdint.h>

  25. #include "avformat.h"

  26. #include "metadata.h"

  27. 

  28. #define PACKET_SIZE 3200

  29. 

  30. typedef struct {

  31.     int num;

  32.     unsigned char seq;

  33.     /* use for reading */

  34.     AVPacket pkt;

  35.     int frag_offset;

  36.     int timestamp;

  37.     int64_t duration;

  38. 

  39.     int ds_span;                /* descrambling  */

  40.     int ds_packet_size;

  41.     int ds_chunk_size;

  42. 

  43.     int64_t packet_pos;

  44. 

  45.     uint16_t stream_language_index;

  46. 

  47. } ASFStream;

  48. 

  49. typedef uint8_t ff_asf_guid[16];

  50. 

  51. typedef struct {

  52.     ff_asf_guid guid;                  ///< generated by client computer

  53.     uint64_t file_size;         /**< in bytes

  54.                                  *   invalid if broadcasting */

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

  56.                                  *   invalid if broadcasting */

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

  58.                                  * invalid if broadcasting */

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

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

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

  62.                                  *   if nonzero - subtract from time */

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

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

  65.                                  *   0x02 - seekable

  66.                                  *   rest is reserved should be 0 */

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

  68.                                  *   invalid if broadcasting */

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

  70.                                  *   invalid if broadcasting */

  71.     uint32_t max_bitrate;       /**< bandwidth of stream in bps

  72.                                  *   should be the sum of bitrates of the

  73.                                  *   individual media streams */

  74. } ASFMainHeader;

  75. 

  76. 

  77. typedef struct {

  78.     uint32_t packet_number;

  79.     uint16_t packet_count;

  80. } ASFIndex;

  81. 

  82. 

  83. typedef struct {

  84.     uint32_t seqno;

  85.     int is_streamed;

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

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

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

  89.     char stream_languages[128][6];       ///< max number of streams, language for each (RFC1766, e.g. en-US)

  90.     /* non streamed additonnal info */

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

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

  93.     /* packet filling */

  94.     unsigned char multi_payloads_present;

  95.     int packet_size_left;

  96.     int packet_timestamp_start;

  97.     int packet_timestamp_end;

  98.     unsigned int packet_nb_payloads;

  99.     int packet_nb_frames;

  100.     uint8_t packet_buf[PACKET_SIZE];

  101.     ByteIOContext pb;

  102.     /* only for reading */

  103.     uint64_t data_offset;                ///< beginning of the first data packet

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

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

  106.     int index_read;

  107. 

  108.     ASFMainHeader hdr;

  109. 

  110.     int packet_flags;

  111.     int packet_property;

  112.     int packet_timestamp;

  113.     int packet_segsizetype;

  114.     int packet_segments;

  115.     int packet_seq;

  116.     int packet_replic_size;

  117.     int packet_key_frame;

  118.     int packet_padsize;

  119.     unsigned int packet_frag_offset;

  120.     unsigned int packet_frag_size;

  121.     int64_t packet_frag_timestamp;

  122.     int packet_multi_size;

  123.     int packet_obj_size;

  124.     int packet_time_delta;

  125.     int packet_time_start;

  126.     int64_t packet_pos;

  127. 

  128.     int stream_index;

  129. 

  130. 

  131.     int64_t last_indexed_pts;

  132.     ASFIndex* index_ptr;

  133.     uint32_t nb_index_count;

  134.     uint32_t nb_index_memory_alloc;

  135.     uint16_t maximum_packet;

  136. 

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

  138. } ASFContext;

  139. 

  140. extern const ff_asf_guid ff_asf_header;

  141. extern const ff_asf_guid ff_asf_file_header;

  142. extern const ff_asf_guid ff_asf_stream_header;

  143. extern const ff_asf_guid ff_asf_ext_stream_header;

  144. extern const ff_asf_guid ff_asf_audio_stream;

  145. extern const ff_asf_guid ff_asf_audio_conceal_none;

  146. extern const ff_asf_guid ff_asf_audio_conceal_spread;

  147. extern const ff_asf_guid ff_asf_video_stream;

  148. extern const ff_asf_guid ff_asf_video_conceal_none;

  149. extern const ff_asf_guid ff_asf_command_stream;

  150. extern const ff_asf_guid ff_asf_comment_header;

  151. extern const ff_asf_guid ff_asf_codec_comment_header;

  152. extern const ff_asf_guid ff_asf_codec_comment1_header;

  153. extern const ff_asf_guid ff_asf_data_header;

  154. extern const ff_asf_guid ff_asf_head1_guid;

  155. extern const ff_asf_guid ff_asf_head2_guid;

  156. extern const ff_asf_guid ff_asf_extended_content_header;

  157. extern const ff_asf_guid ff_asf_simple_index_header;

  158. extern const ff_asf_guid ff_asf_ext_stream_embed_stream_header;

  159. extern const ff_asf_guid ff_asf_ext_stream_audio_stream;

  160. extern const ff_asf_guid ff_asf_metadata_header;

  161. extern const ff_asf_guid ff_asf_marker_header;

  162. extern const ff_asf_guid ff_asf_my_guid;

  163. extern const ff_asf_guid ff_asf_language_guid;

  164. extern const ff_asf_guid ff_asf_content_encryption;

  165. extern const ff_asf_guid ff_asf_ext_content_encryption;

  166. extern const ff_asf_guid ff_asf_digital_signature;

  167. 

  168. extern const AVMetadataConv ff_asf_metadata_conv[];

  169. 

  170. #define ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT 0x80 //1000 0000

  171. 

  172. 

  173. //   ASF data packet structure

  174. //   =========================

  175. //

  176. //

  177. //  -----------------------------------

  178. // | Error Correction Data             |  Optional

  179. //  -----------------------------------

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

  181. //  -----------------------------------

  182. // | Payload Data                      |

  183. //  -----------------------------------

  184. // | Padding Data                      |

  185. //  -----------------------------------

  186. 

  187. 

  188. // PPI_FLAG - Payload parsing information flags

  189. #define ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT 1

  190. 

  191. #define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_BYTE  0x02 //0000 0010

  192. #define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_WORD  0x04 //0000 0100

  193. #define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_DWORD 0x06 //0000 0110

  194. #define ASF_PPI_MASK_SEQUENCE_FIELD_SIZE     0x06 //0000 0110

  195. 

  196. #define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE  0x08 //0000 1000

  197. #define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD  0x10 //0001 0000

  198. #define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_DWORD 0x18 //0001 1000

  199. #define ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE     0x18 //0001 1000

  200. 

  201. #define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_BYTE  0x20 //0010 0000

  202. #define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_WORD  0x40 //0100 0000

  203. #define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_DWORD 0x60 //0110 0000

  204. #define ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE     0x60 //0110 0000

  205. 

  206. // PL_FLAG - Payload flags

  207. #define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE   0x01 //0000 0001

  208. #define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_WORD   0x02 //0000 0010

  209. #define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_DWORD  0x03 //0000 0011

  210. #define ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE      0x03 //0000 0011

  211. 

  212. #define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_BYTE  0x04 //0000 0100

  213. #define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_WORD  0x08 //0000 1000

  214. #define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD 0x0c //0000 1100

  215. #define ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE     0x0c //0000 1100

  216. 

  217. #define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE  0x10 //0001 0000

  218. #define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_WORD  0x20 //0010 0000

  219. #define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_DWORD 0x30 //0011 0000

  220. #define ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE     0x30 //0011 0000

  221. 

  222. #define ASF_PL_FLAG_STREAM_NUMBER_LENGTH_FIELD_IS_BYTE  0x40 //0100 0000

  223. #define ASF_PL_MASK_STREAM_NUMBER_LENGTH_FIELD_SIZE     0xc0 //1100 0000

  224. 

  225. #define ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_BYTE  0x40 //0100 0000

  226. #define ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD  0x80 //1000 0000

  227. #define ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE     0xc0 //1100 0000

  228. 

  229. #define ASF_PL_FLAG_KEY_FRAME 0x80 //1000 0000

  230. 

  231. extern AVInputFormat asf_demuxer;

  232. int ff_put_str16_nolen(ByteIOContext *s, const char *tag);

  233. 

  234. #endif /* AVFORMAT_ASF_H */