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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 } ASFStream;
00046 
00047 typedef uint8_t GUID[16];
00048 
00049 typedef struct {
00050     GUID guid;                  
00051     uint64_t file_size;         
00053     uint64_t create_time;       
00055     uint64_t play_time;         
00057     uint64_t send_time;         
00059     uint32_t preroll;           
00061     uint32_t ignore;            
00062     uint32_t flags;             
00065     uint32_t min_pktsize;       
00067     uint32_t max_pktsize;       
00069     uint32_t max_bitrate;       
00072 } ASFMainHeader;
00073 
00074 
00075 typedef struct {
00076     uint32_t packet_number;
00077     uint16_t packet_count;
00078 } ASFIndex;
00079 
00080 
00081 typedef struct {
00082     uint32_t seqno;
00083     int is_streamed;
00084     int asfid2avid[128];                 
00085     ASFStream streams[128];              
00086     uint32_t stream_bitrates[128];       
00087     /* non streamed additonnal info */
00088     uint64_t nb_packets;                 
00089     int64_t duration;                    
00090     /* packet filling */
00091     unsigned char multi_payloads_present;
00092     int packet_size_left;
00093     int packet_timestamp_start;
00094     int packet_timestamp_end;
00095     unsigned int packet_nb_payloads;
00096     int packet_nb_frames;
00097     uint8_t packet_buf[PACKET_SIZE];
00098     ByteIOContext pb;
00099     /* only for reading */
00100     uint64_t data_offset;                
00101     uint64_t data_object_offset;         
00102     uint64_t data_object_size;           
00103     int index_read;
00104 
00105     ASFMainHeader hdr;
00106 
00107     int packet_flags;
00108     int packet_property;
00109     int packet_timestamp;
00110     int packet_segsizetype;
00111     int packet_segments;
00112     int packet_seq;
00113     int packet_replic_size;
00114     int packet_key_frame;
00115     int packet_padsize;
00116     unsigned int packet_frag_offset;
00117     unsigned int packet_frag_size;
00118     int64_t packet_frag_timestamp;
00119     int packet_multi_size;
00120     int packet_obj_size;
00121     int packet_time_delta;
00122     int packet_time_start;
00123     int64_t packet_pos;
00124 
00125     int stream_index;
00126 
00127 
00128     int64_t last_indexed_pts;
00129     ASFIndex* index_ptr;
00130     uint32_t nb_index_count;
00131     uint32_t nb_index_memory_alloc;
00132     uint16_t maximum_packet;
00133 
00134     ASFStream* asf_st;                   
00135 } ASFContext;
00136 
00137 extern const GUID ff_asf_header;
00138 extern const GUID ff_asf_file_header;
00139 extern const GUID ff_asf_stream_header;
00140 extern const GUID ff_asf_ext_stream_header;
00141 extern const GUID ff_asf_audio_stream;
00142 extern const GUID ff_asf_audio_conceal_none;
00143 extern const GUID ff_asf_audio_conceal_spread;
00144 extern const GUID ff_asf_video_stream;
00145 extern const GUID ff_asf_video_conceal_none;
00146 extern const GUID ff_asf_command_stream;
00147 extern const GUID ff_asf_comment_header;
00148 extern const GUID ff_asf_codec_comment_header;
00149 extern const GUID ff_asf_codec_comment1_header;
00150 extern const GUID ff_asf_data_header;
00151 extern const GUID ff_asf_head1_guid;
00152 extern const GUID ff_asf_head2_guid;
00153 extern const GUID ff_asf_extended_content_header;
00154 extern const GUID ff_asf_simple_index_header;
00155 extern const GUID ff_asf_ext_stream_embed_stream_header;
00156 extern const GUID ff_asf_ext_stream_audio_stream;
00157 extern const GUID ff_asf_metadata_header;
00158 extern const GUID ff_asf_my_guid;
00159 
00160 extern const AVMetadataConv ff_asf_metadata_conv[];
00161 
00162 #define ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT 0x80 //1000 0000
00163 
00164 
00165 //   ASF data packet structure
00166 //   =========================
00167 //
00168 //
00169 //  -----------------------------------
00170 // | Error Correction Data             |  Optional
00171 //  -----------------------------------
00172 // | Payload Parsing Information (PPI) |
00173 //  -----------------------------------
00174 // | Payload Data                      |
00175 //  -----------------------------------
00176 // | Padding Data                      |
00177 //  -----------------------------------
00178 
00179 
00180 // PPI_FLAG - Payload parsing information flags
00181 #define ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT 1
00182 
00183 #define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_BYTE  0x02 //0000 0010
00184 #define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_WORD  0x04 //0000 0100
00185 #define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_DWORD 0x06 //0000 0110
00186 #define ASF_PPI_MASK_SEQUENCE_FIELD_SIZE     0x06 //0000 0110
00187 
00188 #define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE  0x08 //0000 1000
00189 #define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD  0x10 //0001 0000
00190 #define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_DWORD 0x18 //0001 1000
00191 #define ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE     0x18 //0001 1000
00192 
00193 #define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_BYTE  0x20 //0010 0000
00194 #define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_WORD  0x40 //0100 0000
00195 #define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_DWORD 0x60 //0110 0000
00196 #define ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE     0x60 //0110 0000
00197 
00198 // PL_FLAG - Payload flags
00199 #define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE   0x01 //0000 0001
00200 #define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_WORD   0x02 //0000 0010
00201 #define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_DWORD  0x03 //0000 0011
00202 #define ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE      0x03 //0000 0011
00203 
00204 #define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_BYTE  0x04 //0000 0100
00205 #define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_WORD  0x08 //0000 1000
00206 #define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD 0x0c //0000 1100
00207 #define ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE     0x0c //0000 1100
00208 
00209 #define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE  0x10 //0001 0000
00210 #define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_WORD  0x20 //0010 0000
00211 #define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_DWORD 0x30 //0011 0000
00212 #define ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE     0x30 //0011 0000
00213 
00214 #define ASF_PL_FLAG_STREAM_NUMBER_LENGTH_FIELD_IS_BYTE  0x40 //0100 0000
00215 #define ASF_PL_MASK_STREAM_NUMBER_LENGTH_FIELD_SIZE     0xc0 //1100 0000
00216 
00217 #define ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_BYTE  0x40 //0100 0000
00218 #define ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD  0x80 //1000 0000
00219 #define ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE     0xc0 //1100 0000
00220 
00221 #define ASF_PL_FLAG_KEY_FRAME 0x80 //1000 0000
00222 
00223 extern AVInputFormat asf_demuxer;
00224 
00231 int ff_asf_get_packet(AVFormatContext *s, ByteIOContext *pb);
00232 
00242 int ff_asf_parse_packet(AVFormatContext *s, ByteIOContext *pb, AVPacket *pkt);
00243 
00244 #endif /* AVFORMAT_ASF_H */

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