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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. #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.  
  47.     int ds_span;                /* descrambling  */
  48.     int ds_packet_size;
  49.     int ds_chunk_size;
  50.  
  51.     int64_t packet_pos;
  52.  
  53.     uint16_t stream_language_index;
  54.  
  55.     int      palette_changed;
  56.     uint32_t palette[256];
  57.  
  58.     int payload_ext_ct;
  59.     ASFPayload payload[8];
  60. } ASFStream;
  61.  
  62. typedef struct ASFMainHeader {
  63.     ff_asf_guid guid;                  ///< generated by client computer
  64.     uint64_t file_size;         /**< in bytes
  65.                                  *   invalid if broadcasting */
  66.     uint64_t create_time;       /**< time of creation, in 100-nanosecond units since 1.1.1601
  67.                                  *   invalid if broadcasting */
  68.     uint64_t play_time;         /**< play time, in 100-nanosecond units
  69.                                  * invalid if broadcasting */
  70.     uint64_t send_time;         /**< time to send file, in 100-nanosecond units
  71.                                  *   invalid if broadcasting (could be ignored) */
  72.     uint32_t preroll;           /**< timestamp of the first packet, in milliseconds
  73.                                  *   if nonzero - subtract from time */
  74.     uint32_t ignore;            ///< preroll is 64bit - but let's just ignore it
  75.     uint32_t flags;             /**< 0x01 - broadcast
  76.                                  *   0x02 - seekable
  77.                                  *   rest is reserved should be 0 */
  78.     uint32_t min_pktsize;       /**< size of a data packet
  79.                                  *   invalid if broadcasting */
  80.     uint32_t max_pktsize;       /**< shall be the same as for min_pktsize
  81.                                  *   invalid if broadcasting */
  82.     uint32_t max_bitrate;       /**< bandwidth of stream in bps
  83.                                  *   should be the sum of bitrates of the
  84.                                  *   individual media streams */
  85. } ASFMainHeader;
  86.  
  87.  
  88. typedef struct ASFIndex {
  89.     uint32_t packet_number;
  90.     uint16_t packet_count;
  91.     uint64_t send_time;
  92.     uint64_t offset;
  93. } ASFIndex;
  94.  
  95. extern const ff_asf_guid ff_asf_header;
  96. extern const ff_asf_guid ff_asf_file_header;
  97. extern const ff_asf_guid ff_asf_stream_header;
  98. extern const ff_asf_guid ff_asf_ext_stream_header;
  99. extern const ff_asf_guid ff_asf_audio_stream;
  100. extern const ff_asf_guid ff_asf_audio_conceal_none;
  101. extern const ff_asf_guid ff_asf_audio_conceal_spread;
  102. extern const ff_asf_guid ff_asf_video_stream;
  103. extern const ff_asf_guid ff_asf_jfif_media;
  104. extern const ff_asf_guid ff_asf_video_conceal_none;
  105. extern const ff_asf_guid ff_asf_command_stream;
  106. extern const ff_asf_guid ff_asf_comment_header;
  107. extern const ff_asf_guid ff_asf_codec_comment_header;
  108. extern const ff_asf_guid ff_asf_codec_comment1_header;
  109. extern const ff_asf_guid ff_asf_data_header;
  110. extern const ff_asf_guid ff_asf_head1_guid;
  111. extern const ff_asf_guid ff_asf_head2_guid;
  112. extern const ff_asf_guid ff_asf_extended_content_header;
  113. extern const ff_asf_guid ff_asf_simple_index_header;
  114. extern const ff_asf_guid ff_asf_ext_stream_embed_stream_header;
  115. extern const ff_asf_guid ff_asf_ext_stream_audio_stream;
  116. extern const ff_asf_guid ff_asf_metadata_header;
  117. extern const ff_asf_guid ff_asf_metadata_library_header;
  118. extern const ff_asf_guid ff_asf_marker_header;
  119. extern const ff_asf_guid ff_asf_reserved_4;
  120. extern const ff_asf_guid ff_asf_my_guid;
  121. extern const ff_asf_guid ff_asf_language_guid;
  122. extern const ff_asf_guid ff_asf_content_encryption;
  123. extern const ff_asf_guid ff_asf_ext_content_encryption;
  124. extern const ff_asf_guid ff_asf_digital_signature;
  125.  
  126. extern const AVMetadataConv ff_asf_metadata_conv[];
  127.  
  128. #define ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT 0x80 //1000 0000
  129.  
  130.  
  131. //   ASF data packet structure
  132. //   =========================
  133. //
  134. //
  135. //  -----------------------------------
  136. // | Error Correction Data             |  Optional
  137. //  -----------------------------------
  138. // | Payload Parsing Information (PPI) |
  139. //  -----------------------------------
  140. // | Payload Data                      |
  141. //  -----------------------------------
  142. // | Padding Data                      |
  143. //  -----------------------------------
  144.  
  145.  
  146. // PPI_FLAG - Payload parsing information flags
  147. #define ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT 1
  148.  
  149. #define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_BYTE  0x02 //0000 0010
  150. #define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_WORD  0x04 //0000 0100
  151. #define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_DWORD 0x06 //0000 0110
  152. #define ASF_PPI_MASK_SEQUENCE_FIELD_SIZE     0x06 //0000 0110
  153.  
  154. #define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE  0x08 //0000 1000
  155. #define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD  0x10 //0001 0000
  156. #define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_DWORD 0x18 //0001 1000
  157. #define ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE     0x18 //0001 1000
  158.  
  159. #define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_BYTE  0x20 //0010 0000
  160. #define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_WORD  0x40 //0100 0000
  161. #define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_DWORD 0x60 //0110 0000
  162. #define ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE     0x60 //0110 0000
  163.  
  164. // PL_FLAG - Payload flags
  165. #define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE   0x01 //0000 0001
  166. #define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_WORD   0x02 //0000 0010
  167. #define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_DWORD  0x03 //0000 0011
  168. #define ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE      0x03 //0000 0011
  169.  
  170. #define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_BYTE  0x04 //0000 0100
  171. #define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_WORD  0x08 //0000 1000
  172. #define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD 0x0c //0000 1100
  173. #define ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE     0x0c //0000 1100
  174.  
  175. #define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE  0x10 //0001 0000
  176. #define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_WORD  0x20 //0010 0000
  177. #define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_DWORD 0x30 //0011 0000
  178. #define ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE     0x30 //0011 0000
  179.  
  180. #define ASF_PL_FLAG_STREAM_NUMBER_LENGTH_FIELD_IS_BYTE  0x40 //0100 0000
  181. #define ASF_PL_MASK_STREAM_NUMBER_LENGTH_FIELD_SIZE     0xc0 //1100 0000
  182.  
  183. #define ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_BYTE  0x40 //0100 0000
  184. #define ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD  0x80 //1000 0000
  185. #define ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE     0xc0 //1100 0000
  186.  
  187. #define ASF_PL_FLAG_KEY_FRAME 0x80 //1000 0000
  188.  
  189. extern AVInputFormat ff_asf_demuxer;
  190.  
  191. void ff_put_guid(AVIOContext *s, const ff_asf_guid *g);
  192.  
  193. #endif /* AVFORMAT_ASF_H */
  194.