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libavformat/asf.h

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00001 /*
00002  * Copyright (c) 2000, 2001 Fabrice Bellard
00003  *
00004  * This file is part of FFmpeg.
00005  *
00006  * FFmpeg is free software; you can redistribute it and/or
00007  * modify it under the terms of the GNU Lesser General Public
00008  * License as published by the Free Software Foundation; either
00009  * version 2.1 of the License, or (at your option) any later version.
00010  *
00011  * FFmpeg is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014  * Lesser General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU Lesser General Public
00017  * License along with FFmpeg; if not, write to the Free Software
00018  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00019  */
00020 
00021 #ifndef AVFORMAT_ASF_H
00022 #define AVFORMAT_ASF_H
00023 
00024 #include <stdint.h>
00025 #include "avformat.h"
00026 #include "metadata.h"
00027 
00028 #define PACKET_SIZE 3200
00029 
00030 typedef struct {
00031     int num;
00032     unsigned char seq;
00033     /* use for reading */
00034     AVPacket pkt;
00035     int frag_offset;
00036     int timestamp;
00037     int64_t duration;
00038 
00039     int ds_span;                /* descrambling  */
00040     int ds_packet_size;
00041     int ds_chunk_size;
00042 
00043     int64_t packet_pos;
00044 
00045     uint16_t stream_language_index;
00046 
00047 } ASFStream;
00048 
00049 typedef uint8_t ff_asf_guid[16];
00050 
00051 typedef struct {
00052     ff_asf_guid guid;                  
00053     uint64_t file_size;         
00055     uint64_t create_time;       
00057     uint64_t play_time;         
00059     uint64_t send_time;         
00061     uint32_t preroll;           
00063     uint32_t ignore;            
00064     uint32_t flags;             
00067     uint32_t min_pktsize;       
00069     uint32_t max_pktsize;       
00071     uint32_t max_bitrate;       
00074 } ASFMainHeader;
00075 
00076 
00077 typedef struct {
00078     uint32_t packet_number;
00079     uint16_t packet_count;
00080 } ASFIndex;
00081 
00082 
00083 typedef struct {
00084     uint32_t seqno;
00085     int is_streamed;
00086     int asfid2avid[128];                 
00087     ASFStream streams[128];              
00088     uint32_t stream_bitrates[128];       
00089     char stream_languages[128][6];       
00090     /* non streamed additonnal info */
00091     uint64_t nb_packets;                 
00092     int64_t duration;                    
00093     /* packet filling */
00094     unsigned char multi_payloads_present;
00095     int packet_size_left;
00096     int packet_timestamp_start;
00097     int packet_timestamp_end;
00098     unsigned int packet_nb_payloads;
00099     int packet_nb_frames;
00100     uint8_t packet_buf[PACKET_SIZE];
00101     ByteIOContext pb;
00102     /* only for reading */
00103     uint64_t data_offset;                
00104     uint64_t data_object_offset;         
00105     uint64_t data_object_size;           
00106     int index_read;
00107 
00108     ASFMainHeader hdr;
00109 
00110     int packet_flags;
00111     int packet_property;
00112     int packet_timestamp;
00113     int packet_segsizetype;
00114     int packet_segments;
00115     int packet_seq;
00116     int packet_replic_size;
00117     int packet_key_frame;
00118     int packet_padsize;
00119     unsigned int packet_frag_offset;
00120     unsigned int packet_frag_size;
00121     int64_t packet_frag_timestamp;
00122     int packet_multi_size;
00123     int packet_obj_size;
00124     int packet_time_delta;
00125     int packet_time_start;
00126     int64_t packet_pos;
00127 
00128     int stream_index;
00129 
00130 
00131     int64_t last_indexed_pts;
00132     ASFIndex* index_ptr;
00133     uint32_t nb_index_count;
00134     uint32_t nb_index_memory_alloc;
00135     uint16_t maximum_packet;
00136 
00137     ASFStream* asf_st;                   
00138 } ASFContext;
00139 
00140 extern const ff_asf_guid ff_asf_header;
00141 extern const ff_asf_guid ff_asf_file_header;
00142 extern const ff_asf_guid ff_asf_stream_header;
00143 extern const ff_asf_guid ff_asf_ext_stream_header;
00144 extern const ff_asf_guid ff_asf_audio_stream;
00145 extern const ff_asf_guid ff_asf_audio_conceal_none;
00146 extern const ff_asf_guid ff_asf_audio_conceal_spread;
00147 extern const ff_asf_guid ff_asf_video_stream;
00148 extern const ff_asf_guid ff_asf_video_conceal_none;
00149 extern const ff_asf_guid ff_asf_command_stream;
00150 extern const ff_asf_guid ff_asf_comment_header;
00151 extern const ff_asf_guid ff_asf_codec_comment_header;
00152 extern const ff_asf_guid ff_asf_codec_comment1_header;
00153 extern const ff_asf_guid ff_asf_data_header;
00154 extern const ff_asf_guid ff_asf_head1_guid;
00155 extern const ff_asf_guid ff_asf_head2_guid;
00156 extern const ff_asf_guid ff_asf_extended_content_header;
00157 extern const ff_asf_guid ff_asf_simple_index_header;
00158 extern const ff_asf_guid ff_asf_ext_stream_embed_stream_header;
00159 extern const ff_asf_guid ff_asf_ext_stream_audio_stream;
00160 extern const ff_asf_guid ff_asf_metadata_header;
00161 extern const ff_asf_guid ff_asf_marker_header;
00162 extern const ff_asf_guid ff_asf_my_guid;
00163 extern const ff_asf_guid ff_asf_language_guid;
00164 extern const ff_asf_guid ff_asf_content_encryption;
00165 extern const ff_asf_guid ff_asf_ext_content_encryption;
00166 extern const ff_asf_guid ff_asf_digital_signature;
00167 
00168 extern const AVMetadataConv ff_asf_metadata_conv[];
00169 
00170 #define ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT 0x80 //1000 0000
00171 
00172 
00173 //   ASF data packet structure
00174 //   =========================
00175 //
00176 //
00177 //  -----------------------------------
00178 // | Error Correction Data             |  Optional
00179 //  -----------------------------------
00180 // | Payload Parsing Information (PPI) |
00181 //  -----------------------------------
00182 // | Payload Data                      |
00183 //  -----------------------------------
00184 // | Padding Data                      |
00185 //  -----------------------------------
00186 
00187 
00188 // PPI_FLAG - Payload parsing information flags
00189 #define ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT 1
00190 
00191 #define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_BYTE  0x02 //0000 0010
00192 #define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_WORD  0x04 //0000 0100
00193 #define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_DWORD 0x06 //0000 0110
00194 #define ASF_PPI_MASK_SEQUENCE_FIELD_SIZE     0x06 //0000 0110
00195 
00196 #define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE  0x08 //0000 1000
00197 #define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD  0x10 //0001 0000
00198 #define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_DWORD 0x18 //0001 1000
00199 #define ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE     0x18 //0001 1000
00200 
00201 #define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_BYTE  0x20 //0010 0000
00202 #define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_WORD  0x40 //0100 0000
00203 #define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_DWORD 0x60 //0110 0000
00204 #define ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE     0x60 //0110 0000
00205 
00206 // PL_FLAG - Payload flags
00207 #define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE   0x01 //0000 0001
00208 #define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_WORD   0x02 //0000 0010
00209 #define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_DWORD  0x03 //0000 0011
00210 #define ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE      0x03 //0000 0011
00211 
00212 #define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_BYTE  0x04 //0000 0100
00213 #define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_WORD  0x08 //0000 1000
00214 #define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD 0x0c //0000 1100
00215 #define ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE     0x0c //0000 1100
00216 
00217 #define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE  0x10 //0001 0000
00218 #define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_WORD  0x20 //0010 0000
00219 #define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_DWORD 0x30 //0011 0000
00220 #define ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE     0x30 //0011 0000
00221 
00222 #define ASF_PL_FLAG_STREAM_NUMBER_LENGTH_FIELD_IS_BYTE  0x40 //0100 0000
00223 #define ASF_PL_MASK_STREAM_NUMBER_LENGTH_FIELD_SIZE     0xc0 //1100 0000
00224 
00225 #define ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_BYTE  0x40 //0100 0000
00226 #define ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD  0x80 //1000 0000
00227 #define ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE     0xc0 //1100 0000
00228 
00229 #define ASF_PL_FLAG_KEY_FRAME 0x80 //1000 0000
00230 
00231 extern AVInputFormat asf_demuxer;
00232 int ff_put_str16_nolen(ByteIOContext *s, const char *tag);
00233 
00234 #endif /* AVFORMAT_ASF_H */

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