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 {
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 {
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 {
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 */