1/*
2 * Copyright (c) 2000, 2001 Fabrice Bellard
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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#include "riff.h"
28
29#define PACKET_SIZE 3200
30
31typedef struct ASFPayload {
32    uint8_t type;
33    uint16_t size;
34} ASFPayload;
35
36typedef struct ASFStream {
37    int num;
38    unsigned char seq;
39    /* use for reading */
40    AVPacket pkt;
41    int frag_offset;
42    int packet_obj_size;
43    int timestamp;
44    int64_t duration;
45    int skip_to_key;
46    int pkt_clean;
47
48    int ds_span;                /* descrambling  */
49    int ds_packet_size;
50    int ds_chunk_size;
51
52    int64_t packet_pos;
53
54    uint16_t stream_language_index;
55
56    int      palette_changed;
57    uint32_t palette[256];
58
59    int payload_ext_ct;
60    ASFPayload payload[8];
61} ASFStream;
62
63typedef struct ASFMainHeader {
64    ff_asf_guid guid;                  ///< generated by client computer
65    uint64_t file_size;         /**< in bytes
66                                 *   invalid if broadcasting */
67    uint64_t create_time;       /**< time of creation, in 100-nanosecond units since 1.1.1601
68                                 *   invalid if broadcasting */
69    uint64_t play_time;         /**< play time, in 100-nanosecond units
70                                 * invalid if broadcasting */
71    uint64_t send_time;         /**< time to send file, in 100-nanosecond units
72                                 *   invalid if broadcasting (could be ignored) */
73    uint32_t preroll;           /**< timestamp of the first packet, in milliseconds
74                                 *   if nonzero - subtract from time */
75    uint32_t ignore;            ///< preroll is 64bit - but let's just ignore it
76    uint32_t flags;             /**< 0x01 - broadcast
77                                 *   0x02 - seekable
78                                 *   rest is reserved should be 0 */
79    uint32_t min_pktsize;       /**< size of a data packet
80                                 *   invalid if broadcasting */
81    uint32_t max_pktsize;       /**< shall be the same as for min_pktsize
82                                 *   invalid if broadcasting */
83    uint32_t max_bitrate;       /**< bandwidth of stream in bps
84                                 *   should be the sum of bitrates of the
85                                 *   individual media streams */
86} ASFMainHeader;
87
88
89typedef struct ASFIndex {
90    uint32_t packet_number;
91    uint16_t packet_count;
92    uint64_t send_time;
93    uint64_t offset;
94} ASFIndex;
95
96extern const ff_asf_guid ff_asf_header;
97extern const ff_asf_guid ff_asf_file_header;
98extern const ff_asf_guid ff_asf_stream_header;
99extern const ff_asf_guid ff_asf_ext_stream_header;
100extern const ff_asf_guid ff_asf_audio_stream;
101extern const ff_asf_guid ff_asf_audio_conceal_none;
102extern const ff_asf_guid ff_asf_audio_conceal_spread;
103extern const ff_asf_guid ff_asf_video_stream;
104extern const ff_asf_guid ff_asf_jfif_media;
105extern const ff_asf_guid ff_asf_video_conceal_none;
106extern const ff_asf_guid ff_asf_command_stream;
107extern const ff_asf_guid ff_asf_comment_header;
108extern const ff_asf_guid ff_asf_codec_comment_header;
109extern const ff_asf_guid ff_asf_codec_comment1_header;
110extern const ff_asf_guid ff_asf_data_header;
111extern const ff_asf_guid ff_asf_head1_guid;
112extern const ff_asf_guid ff_asf_head2_guid;
113extern const ff_asf_guid ff_asf_extended_content_header;
114extern const ff_asf_guid ff_asf_simple_index_header;
115extern const ff_asf_guid ff_asf_ext_stream_embed_stream_header;
116extern const ff_asf_guid ff_asf_ext_stream_audio_stream;
117extern const ff_asf_guid ff_asf_metadata_header;
118extern const ff_asf_guid ff_asf_metadata_library_header;
119extern const ff_asf_guid ff_asf_marker_header;
120extern const ff_asf_guid ff_asf_reserved_4;
121extern const ff_asf_guid ff_asf_my_guid;
122extern const ff_asf_guid ff_asf_language_guid;
123extern const ff_asf_guid ff_asf_content_encryption;
124extern const ff_asf_guid ff_asf_ext_content_encryption;
125extern const ff_asf_guid ff_asf_digital_signature;
126
127extern const AVMetadataConv ff_asf_metadata_conv[];
128
129#define ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT 0x80 //1000 0000
130
131
132//   ASF data packet structure
133//   =========================
134//
135//
136//  -----------------------------------
137// | Error Correction Data             |  Optional
138//  -----------------------------------
139// | Payload Parsing Information (PPI) |
140//  -----------------------------------
141// | Payload Data                      |
142//  -----------------------------------
143// | Padding Data                      |
144//  -----------------------------------
145
146
147// PPI_FLAG - Payload parsing information flags
148#define ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT 1
149
150#define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_BYTE  0x02 //0000 0010
151#define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_WORD  0x04 //0000 0100
152#define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_DWORD 0x06 //0000 0110
153#define ASF_PPI_MASK_SEQUENCE_FIELD_SIZE     0x06 //0000 0110
154
155#define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE  0x08 //0000 1000
156#define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD  0x10 //0001 0000
157#define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_DWORD 0x18 //0001 1000
158#define ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE     0x18 //0001 1000
159
160#define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_BYTE  0x20 //0010 0000
161#define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_WORD  0x40 //0100 0000
162#define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_DWORD 0x60 //0110 0000
163#define ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE     0x60 //0110 0000
164
165// PL_FLAG - Payload flags
166#define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE   0x01 //0000 0001
167#define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_WORD   0x02 //0000 0010
168#define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_DWORD  0x03 //0000 0011
169#define ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE      0x03 //0000 0011
170
171#define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_BYTE  0x04 //0000 0100
172#define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_WORD  0x08 //0000 1000
173#define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD 0x0c //0000 1100
174#define ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE     0x0c //0000 1100
175
176#define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE  0x10 //0001 0000
177#define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_WORD  0x20 //0010 0000
178#define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_DWORD 0x30 //0011 0000
179#define ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE     0x30 //0011 0000
180
181#define ASF_PL_FLAG_STREAM_NUMBER_LENGTH_FIELD_IS_BYTE  0x40 //0100 0000
182#define ASF_PL_MASK_STREAM_NUMBER_LENGTH_FIELD_SIZE     0xc0 //1100 0000
183
184#define ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_BYTE  0x40 //0100 0000
185#define ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD  0x80 //1000 0000
186#define ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE     0xc0 //1100 0000
187
188#define ASF_PL_FLAG_KEY_FRAME 0x80 //1000 0000
189
190extern AVInputFormat ff_asf_demuxer;
191
192#endif /* AVFORMAT_ASF_H */
193