2 * Copyright (c) 2000, 2001 Fabrice Bellard
4 * This file is part of Libav.
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.
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.
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
21 #ifndef AVFORMAT_ASF_H
22 #define AVFORMAT_ASF_H
28 #define PACKET_SIZE 3200
39 int ds_span; /* descrambling */
45 uint16_t stream_language_index;
48 uint32_t palette[256];
51 typedef uint8_t ff_asf_guid[16];
54 ff_asf_guid guid; ///< generated by client computer
55 uint64_t file_size; /**< in bytes
56 * invalid if broadcasting */
57 uint64_t create_time; /**< time of creation, in 100-nanosecond units since 1.1.1601
58 * invalid if broadcasting */
59 uint64_t play_time; /**< play time, in 100-nanosecond units
60 * invalid if broadcasting */
61 uint64_t send_time; /**< time to send file, in 100-nanosecond units
62 * invalid if broadcasting (could be ignored) */
63 uint32_t preroll; /**< timestamp of the first packet, in milliseconds
64 * if nonzero - subtract from time */
65 uint32_t ignore; ///< preroll is 64bit - but let's just ignore it
66 uint32_t flags; /**< 0x01 - broadcast
68 * rest is reserved should be 0 */
69 uint32_t min_pktsize; /**< size of a data packet
70 * invalid if broadcasting */
71 uint32_t max_pktsize; /**< shall be the same as for min_pktsize
72 * invalid if broadcasting */
73 uint32_t max_bitrate; /**< bandwidth of stream in bps
74 * should be the sum of bitrates of the
75 * individual media streams */
80 uint32_t packet_number;
81 uint16_t packet_count;
84 extern const ff_asf_guid ff_asf_header;
85 extern const ff_asf_guid ff_asf_file_header;
86 extern const ff_asf_guid ff_asf_stream_header;
87 extern const ff_asf_guid ff_asf_ext_stream_header;
88 extern const ff_asf_guid ff_asf_audio_stream;
89 extern const ff_asf_guid ff_asf_audio_conceal_none;
90 extern const ff_asf_guid ff_asf_audio_conceal_spread;
91 extern const ff_asf_guid ff_asf_video_stream;
92 extern const ff_asf_guid ff_asf_jfif_media;
93 extern const ff_asf_guid ff_asf_video_conceal_none;
94 extern const ff_asf_guid ff_asf_command_stream;
95 extern const ff_asf_guid ff_asf_comment_header;
96 extern const ff_asf_guid ff_asf_codec_comment_header;
97 extern const ff_asf_guid ff_asf_codec_comment1_header;
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;
101 extern const ff_asf_guid ff_asf_extended_content_header;
102 extern const ff_asf_guid ff_asf_simple_index_header;
103 extern const ff_asf_guid ff_asf_ext_stream_embed_stream_header;
104 extern const ff_asf_guid ff_asf_ext_stream_audio_stream;
105 extern const ff_asf_guid ff_asf_metadata_header;
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;
109 extern const ff_asf_guid ff_asf_content_encryption;
110 extern const ff_asf_guid ff_asf_ext_content_encryption;
111 extern const ff_asf_guid ff_asf_digital_signature;
113 extern const AVMetadataConv ff_asf_metadata_conv[];
115 #define ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT 0x80 //1000 0000
118 // ASF data packet structure
119 // =========================
122 // -----------------------------------
123 // | Error Correction Data | Optional
124 // -----------------------------------
125 // | Payload Parsing Information (PPI) |
126 // -----------------------------------
128 // -----------------------------------
130 // -----------------------------------
133 // PPI_FLAG - Payload parsing information flags
134 #define ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT 1
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
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
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
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
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
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
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
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
174 #define ASF_PL_FLAG_KEY_FRAME 0x80 //1000 0000
176 extern AVInputFormat ff_asf_demuxer;
178 static av_always_inline int ff_guidcmp(const void *g1, const void *g2)
180 return memcmp(g1, g2, sizeof(ff_asf_guid));
183 void ff_get_guid(AVIOContext *s, ff_asf_guid *g);
185 #endif /* AVFORMAT_ASF_H */