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
30typedef struct {
31    int num;
32    unsigned char seq;
33    /* use for reading */
34    AVPacket pkt;
35    int frag_offset;
36    int timestamp;
37    int64_t duration;
38
39    int ds_span;                /* descrambling  */
40    int ds_packet_size;
41    int ds_chunk_size;
42
43    int64_t packet_pos;
44
45    uint16_t stream_language_index;
46
47    int      palette_changed;
48    uint32_t palette[256];
49} ASFStream;
50
51typedef uint8_t ff_asf_guid[16];
52
53typedef struct {
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
67                                 *   0x02 - seekable
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 */
76} ASFMainHeader;
77
78
79typedef struct {
80    uint32_t packet_number;
81    uint16_t packet_count;
82} ASFIndex;
83
84extern const ff_asf_guid ff_asf_header;
85extern const ff_asf_guid ff_asf_file_header;
86extern const ff_asf_guid ff_asf_stream_header;
87extern const ff_asf_guid ff_asf_ext_stream_header;
88extern const ff_asf_guid ff_asf_audio_stream;
89extern const ff_asf_guid ff_asf_audio_conceal_none;
90extern const ff_asf_guid ff_asf_audio_conceal_spread;
91extern const ff_asf_guid ff_asf_video_stream;
92extern const ff_asf_guid ff_asf_jfif_media;
93extern const ff_asf_guid ff_asf_video_conceal_none;
94extern const ff_asf_guid ff_asf_command_stream;
95extern const ff_asf_guid ff_asf_comment_header;
96extern const ff_asf_guid ff_asf_codec_comment_header;
97extern const ff_asf_guid ff_asf_codec_comment1_header;
98extern const ff_asf_guid ff_asf_data_header;
99extern const ff_asf_guid ff_asf_head1_guid;
100extern const ff_asf_guid ff_asf_head2_guid;
101extern const ff_asf_guid ff_asf_extended_content_header;
102extern const ff_asf_guid ff_asf_simple_index_header;
103extern const ff_asf_guid ff_asf_ext_stream_embed_stream_header;
104extern const ff_asf_guid ff_asf_ext_stream_audio_stream;
105extern const ff_asf_guid ff_asf_metadata_header;
106extern const ff_asf_guid ff_asf_marker_header;
107extern const ff_asf_guid ff_asf_my_guid;
108extern const ff_asf_guid ff_asf_language_guid;
109extern const ff_asf_guid ff_asf_content_encryption;
110extern const ff_asf_guid ff_asf_ext_content_encryption;
111extern const ff_asf_guid ff_asf_digital_signature;
112
113extern 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
176extern AVInputFormat ff_asf_demuxer;
177
178static av_always_inline int ff_guidcmp(const void *g1, const void *g2)
179{
180    return memcmp(g1, g2, sizeof(ff_asf_guid));
181}
182
183void ff_get_guid(AVIOContext *s, ff_asf_guid *g);
184
185#endif /* AVFORMAT_ASF_H */
186