libavformat/asf.h
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00001 /*
00002  * Copyright (c) 2000, 2001 Fabrice Bellard
00003  *
00004  * This file is part of Libav.
00005  *
00006  * Libav 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  * Libav 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 Libav; 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     int      palette_changed;
00048     uint32_t palette[256];
00049 } ASFStream;
00050 
00051 typedef uint8_t ff_asf_guid[16];
00052 
00053 typedef struct {
00054     ff_asf_guid guid;                  
00055     uint64_t file_size;         
00057     uint64_t create_time;       
00059     uint64_t play_time;         
00061     uint64_t send_time;         
00063     uint32_t preroll;           
00065     uint32_t ignore;            
00066     uint32_t flags;             
00069     uint32_t min_pktsize;       
00071     uint32_t max_pktsize;       
00073     uint32_t max_bitrate;       
00076 } ASFMainHeader;
00077 
00078 
00079 typedef struct {
00080     uint32_t packet_number;
00081     uint16_t packet_count;
00082 } ASFIndex;
00083 
00084 extern const ff_asf_guid ff_asf_header;
00085 extern const ff_asf_guid ff_asf_file_header;
00086 extern const ff_asf_guid ff_asf_stream_header;
00087 extern const ff_asf_guid ff_asf_ext_stream_header;
00088 extern const ff_asf_guid ff_asf_audio_stream;
00089 extern const ff_asf_guid ff_asf_audio_conceal_none;
00090 extern const ff_asf_guid ff_asf_audio_conceal_spread;
00091 extern const ff_asf_guid ff_asf_video_stream;
00092 extern const ff_asf_guid ff_asf_jfif_media;
00093 extern const ff_asf_guid ff_asf_video_conceal_none;
00094 extern const ff_asf_guid ff_asf_command_stream;
00095 extern const ff_asf_guid ff_asf_comment_header;
00096 extern const ff_asf_guid ff_asf_codec_comment_header;
00097 extern const ff_asf_guid ff_asf_codec_comment1_header;
00098 extern const ff_asf_guid ff_asf_data_header;
00099 extern const ff_asf_guid ff_asf_head1_guid;
00100 extern const ff_asf_guid ff_asf_head2_guid;
00101 extern const ff_asf_guid ff_asf_extended_content_header;
00102 extern const ff_asf_guid ff_asf_simple_index_header;
00103 extern const ff_asf_guid ff_asf_ext_stream_embed_stream_header;
00104 extern const ff_asf_guid ff_asf_ext_stream_audio_stream;
00105 extern const ff_asf_guid ff_asf_metadata_header;
00106 extern const ff_asf_guid ff_asf_marker_header;
00107 extern const ff_asf_guid ff_asf_my_guid;
00108 extern const ff_asf_guid ff_asf_language_guid;
00109 extern const ff_asf_guid ff_asf_content_encryption;
00110 extern const ff_asf_guid ff_asf_ext_content_encryption;
00111 extern const ff_asf_guid ff_asf_digital_signature;
00112 
00113 extern const AVMetadataConv ff_asf_metadata_conv[];
00114 
00115 #define ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT 0x80 //1000 0000
00116 
00117 
00118 //   ASF data packet structure
00119 //   =========================
00120 //
00121 //
00122 //  -----------------------------------
00123 // | Error Correction Data             |  Optional
00124 //  -----------------------------------
00125 // | Payload Parsing Information (PPI) |
00126 //  -----------------------------------
00127 // | Payload Data                      |
00128 //  -----------------------------------
00129 // | Padding Data                      |
00130 //  -----------------------------------
00131 
00132 
00133 // PPI_FLAG - Payload parsing information flags
00134 #define ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT 1
00135 
00136 #define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_BYTE  0x02 //0000 0010
00137 #define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_WORD  0x04 //0000 0100
00138 #define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_DWORD 0x06 //0000 0110
00139 #define ASF_PPI_MASK_SEQUENCE_FIELD_SIZE     0x06 //0000 0110
00140 
00141 #define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE  0x08 //0000 1000
00142 #define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD  0x10 //0001 0000
00143 #define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_DWORD 0x18 //0001 1000
00144 #define ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE     0x18 //0001 1000
00145 
00146 #define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_BYTE  0x20 //0010 0000
00147 #define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_WORD  0x40 //0100 0000
00148 #define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_DWORD 0x60 //0110 0000
00149 #define ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE     0x60 //0110 0000
00150 
00151 // PL_FLAG - Payload flags
00152 #define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE   0x01 //0000 0001
00153 #define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_WORD   0x02 //0000 0010
00154 #define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_DWORD  0x03 //0000 0011
00155 #define ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE      0x03 //0000 0011
00156 
00157 #define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_BYTE  0x04 //0000 0100
00158 #define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_WORD  0x08 //0000 1000
00159 #define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD 0x0c //0000 1100
00160 #define ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE     0x0c //0000 1100
00161 
00162 #define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE  0x10 //0001 0000
00163 #define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_WORD  0x20 //0010 0000
00164 #define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_DWORD 0x30 //0011 0000
00165 #define ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE     0x30 //0011 0000
00166 
00167 #define ASF_PL_FLAG_STREAM_NUMBER_LENGTH_FIELD_IS_BYTE  0x40 //0100 0000
00168 #define ASF_PL_MASK_STREAM_NUMBER_LENGTH_FIELD_SIZE     0xc0 //1100 0000
00169 
00170 #define ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_BYTE  0x40 //0100 0000
00171 #define ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD  0x80 //1000 0000
00172 #define ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE     0xc0 //1100 0000
00173 
00174 #define ASF_PL_FLAG_KEY_FRAME 0x80 //1000 0000
00175 
00176 extern AVInputFormat ff_asf_demuxer;
00177 
00178 static av_always_inline int ff_guidcmp(const void *g1, const void *g2)
00179 {
00180     return memcmp(g1, g2, sizeof(ff_asf_guid));
00181 }
00182 
00183 void ff_get_guid(AVIOContext *s, ff_asf_guid *g);
00184 
00185 #endif /* AVFORMAT_ASF_H */