asf.h
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1 /*
2  * Copyright (c) 2000, 2001 Fabrice Bellard
3  *
4  * This file is part of Libav.
5  *
6  * Libav 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  * Libav 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 Libav; 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 ASFStream {
31  int num;
32  unsigned char seq;
33  /* use for reading */
36  int timestamp;
37  int64_t duration;
38 
39  int ds_span; /* descrambling */
42 
43  int64_t packet_pos;
44 
46 
48  uint32_t palette[256];
49 } ASFStream;
50 
51 typedef uint8_t ff_asf_guid[16];
52 
53 typedef struct ASFMainHeader {
55  uint64_t file_size;
57  uint64_t create_time;
59  uint64_t play_time;
61  uint64_t send_time;
63  uint32_t preroll;
65  uint32_t ignore;
66  uint32_t flags;
69  uint32_t min_pktsize;
71  uint32_t max_pktsize;
73  uint32_t max_bitrate;
77 
78 
79 typedef struct ASFIndex {
80  uint32_t packet_number;
81  uint16_t packet_count;
82 } ASFIndex;
83 
84 extern const ff_asf_guid ff_asf_header;
85 extern const ff_asf_guid ff_asf_file_header;
88 extern const ff_asf_guid ff_asf_audio_stream;
91 extern const ff_asf_guid ff_asf_video_stream;
92 extern const ff_asf_guid ff_asf_jfif_media;
98 extern const ff_asf_guid ff_asf_data_header;
99 extern const ff_asf_guid ff_asf_head1_guid;
100 extern const ff_asf_guid ff_asf_head2_guid;
106 extern const ff_asf_guid ff_asf_marker_header;
107 extern const ff_asf_guid ff_asf_my_guid;
108 extern const ff_asf_guid ff_asf_language_guid;
112 
113 extern const AVMetadataConv ff_asf_metadata_conv[];
114 
115 #define ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT 0x80 //1000 0000
116 
117 
118 // ASF data packet structure
119 // =========================
120 //
121 //
122 // -----------------------------------
123 // | Error Correction Data | Optional
124 // -----------------------------------
125 // | Payload Parsing Information (PPI) |
126 // -----------------------------------
127 // | Payload Data |
128 // -----------------------------------
129 // | Padding Data |
130 // -----------------------------------
131 
132 
133 // PPI_FLAG - Payload parsing information flags
134 #define ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT 1
135 
136 #define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_BYTE 0x02 //0000 0010
137 #define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_WORD 0x04 //0000 0100
138 #define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_DWORD 0x06 //0000 0110
139 #define ASF_PPI_MASK_SEQUENCE_FIELD_SIZE 0x06 //0000 0110
140 
141 #define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE 0x08 //0000 1000
142 #define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD 0x10 //0001 0000
143 #define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_DWORD 0x18 //0001 1000
144 #define ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE 0x18 //0001 1000
145 
146 #define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_BYTE 0x20 //0010 0000
147 #define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_WORD 0x40 //0100 0000
148 #define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_DWORD 0x60 //0110 0000
149 #define ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE 0x60 //0110 0000
150 
151 // PL_FLAG - Payload flags
152 #define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE 0x01 //0000 0001
153 #define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_WORD 0x02 //0000 0010
154 #define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_DWORD 0x03 //0000 0011
155 #define ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE 0x03 //0000 0011
156 
157 #define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_BYTE 0x04 //0000 0100
158 #define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_WORD 0x08 //0000 1000
159 #define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD 0x0c //0000 1100
160 #define ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE 0x0c //0000 1100
161 
162 #define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE 0x10 //0001 0000
163 #define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_WORD 0x20 //0010 0000
164 #define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_DWORD 0x30 //0011 0000
165 #define ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE 0x30 //0011 0000
166 
167 #define ASF_PL_FLAG_STREAM_NUMBER_LENGTH_FIELD_IS_BYTE 0x40 //0100 0000
168 #define ASF_PL_MASK_STREAM_NUMBER_LENGTH_FIELD_SIZE 0xc0 //1100 0000
169 
170 #define ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_BYTE 0x40 //0100 0000
171 #define ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD 0x80 //1000 0000
172 #define ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE 0xc0 //1100 0000
173 
174 #define ASF_PL_FLAG_KEY_FRAME 0x80 //1000 0000
175 
177 
178 static av_always_inline int ff_guidcmp(const void *g1, const void *g2)
179 {
180  return memcmp(g1, g2, sizeof(ff_asf_guid));
181 }
182 
184 
185 #endif /* AVFORMAT_ASF_H */
Bytestream IO Context.
Definition: avio.h:68
struct ASFMainHeader ASFMainHeader
const ff_asf_guid ff_asf_video_stream
Definition: asf.c:54
int num
Definition: asf.h:31
Definition: asf.h:79
const ff_asf_guid ff_asf_content_encryption
Definition: asf.c:127
const ff_asf_guid ff_asf_digital_signature
Definition: asf.c:135
int palette_changed
Definition: asf.h:47
const ff_asf_guid ff_asf_ext_stream_embed_stream_header
Definition: asf.c:101
const ff_asf_guid ff_asf_head1_guid
Definition: asf.c:85
const ff_asf_guid ff_asf_my_guid
Definition: asf.c:119
const ff_asf_guid ff_asf_simple_index_header
Definition: asf.c:97
const ff_asf_guid ff_asf_marker_header
Definition: asf.c:113
uint32_t min_pktsize
size of a data packet invalid if broadcasting
Definition: asf.h:69
const ff_asf_guid ff_asf_comment_header
Definition: asf.c:70
uint32_t packet_number
Definition: asf.h:80
const ff_asf_guid ff_asf_video_conceal_none
Definition: asf.c:62
const ff_asf_guid ff_asf_language_guid
Definition: asf.c:123
uint8_t ff_asf_guid[16]
Definition: asf.h:51
const ff_asf_guid ff_asf_jfif_media
Definition: asf.c:58
int64_t duration
Definition: asf.h:37
internal metadata API header see avformat.h or the public API!
uint8_t
uint32_t flags
0x01 - broadcast 0x02 - seekable rest is reserved should be 0
Definition: asf.h:66
const ff_asf_guid ff_asf_audio_conceal_spread
Definition: asf.c:50
const ff_asf_guid ff_asf_codec_comment1_header
Definition: asf.c:77
const ff_asf_guid ff_asf_ext_stream_audio_stream
Definition: asf.c:105
uint64_t send_time
time to send file, in 100-nanosecond units invalid if broadcasting (could be ignored) ...
Definition: asf.h:61
AVPacket pkt
Definition: asf.h:34
uint64_t file_size
in bytes invalid if broadcasting
Definition: asf.h:55
ff_asf_guid guid
generated by client computer
Definition: asf.h:54
g
Definition: yuv2rgb.c:540
int ds_chunk_size
Definition: asf.h:41
int frag_offset
Definition: asf.h:35
const ff_asf_guid ff_asf_data_header
Definition: asf.c:81
struct ASFStream ASFStream
uint32_t max_pktsize
shall be the same as for min_pktsize invalid if broadcasting
Definition: asf.h:71
const ff_asf_guid ff_asf_codec_comment_header
Definition: asf.c:74
const ff_asf_guid ff_asf_stream_header
Definition: asf.c:32
const AVMetadataConv ff_asf_metadata_conv[]
Definition: asf.c:140
uint32_t palette[256]
Definition: asf.h:48
int timestamp
Definition: asf.h:36
const ff_asf_guid ff_asf_audio_conceal_none
Definition: asf.c:44
const ff_asf_guid ff_asf_header
Definition: asf.c:24
uint32_t ignore
preroll is 64bit - but let's just ignore it
Definition: asf.h:65
int ds_span
Definition: asf.h:39
uint64_t create_time
time of creation, in 100-nanosecond units since 1.1.1601 invalid if broadcasting
Definition: asf.h:57
uint64_t play_time
play time, in 100-nanosecond units invalid if broadcasting
Definition: asf.h:59
Definition: asf.h:30
uint16_t stream_language_index
Definition: asf.h:45
AVInputFormat ff_asf_demuxer
Definition: asfdec.c:1399
int ds_packet_size
Definition: asf.h:40
const ff_asf_guid ff_asf_command_stream
Definition: asf.c:66
const ff_asf_guid ff_asf_ext_stream_header
Definition: asf.c:36
const ff_asf_guid ff_asf_extended_content_header
Definition: asf.c:93
uint32_t preroll
timestamp of the first packet, in milliseconds if nonzero - subtract from time
Definition: asf.h:63
int64_t packet_pos
Definition: asf.h:43
Main libavformat public API header.
const ff_asf_guid ff_asf_head2_guid
Definition: asf.c:89
const ff_asf_guid ff_asf_ext_content_encryption
Definition: asf.c:131
struct ASFIndex ASFIndex
unsigned char seq
Definition: asf.h:32
const ff_asf_guid ff_asf_metadata_header
Definition: asf.c:109
const ff_asf_guid ff_asf_audio_stream
Definition: asf.c:40
const ff_asf_guid ff_asf_file_header
Definition: asf.c:28
uint16_t packet_count
Definition: asf.h:81
void ff_get_guid(AVIOContext *s, ff_asf_guid *g)
Definition: asfdec.c:153
This structure stores compressed data.
Definition: avcodec.h:898
uint32_t max_bitrate
bandwidth of stream in bps should be the sum of bitrates of the individual media streams ...
Definition: asf.h:73
static av_always_inline int ff_guidcmp(const void *g1, const void *g2)
Definition: asf.h:178