read and use index (based on a patch by John Donaghy on the 23-03-2006 '[Ffmpeg-devel...
[libav.git] / libavformat / asf.h
1 /*
2 * Copyright (c) 2000, 2001 Fabrice Bellard.
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18 #define PACKET_SIZE 3200
19
20 typedef struct {
21 int num;
22 unsigned char seq;
23 /* use for reading */
24 AVPacket pkt;
25 int frag_offset;
26 int timestamp;
27 int64_t duration;
28
29 int ds_span; /* descrambling */
30 int ds_packet_size;
31 int ds_chunk_size;
32 int ds_data_size;
33 int ds_silence_data;
34
35 int64_t packet_pos;
36
37 } ASFStream;
38
39 typedef struct {
40 uint32_t v1;
41 uint16_t v2;
42 uint16_t v3;
43 uint8_t v4[8];
44 } GUID;
45
46 typedef struct {
47 GUID guid; // generated by client computer
48 uint64_t file_size; // in bytes
49 // invalid if broadcasting
50 uint64_t create_time; // time of creation, in 100-nanosecond units since 1.1.1601
51 // invalid if broadcasting
52 uint64_t packets_count; // how many packets are there in the file
53 // invalid if broadcasting
54 uint64_t play_time; // play time, in 100-nanosecond units
55 // invalid if broadcasting
56 uint64_t send_time; // time to send file, in 100-nanosecond units
57 // invalid if broadcasting (could be ignored)
58 uint32_t preroll; // timestamp of the first packet, in milliseconds
59 // if nonzero - substract from time
60 uint32_t ignore; // preroll is 64bit - but let's just ignore it
61 uint32_t flags; // 0x01 - broadcast
62 // 0x02 - seekable
63 // rest is reserved should be 0
64 uint32_t min_pktsize; // size of a data packet
65 // invalid if broadcasting
66 uint32_t max_pktsize; // shall be the same as for min_pktsize
67 // invalid if broadcasting
68 uint32_t max_bitrate; // bandwith of stream in bps
69 // should be the sum of bitrates of the
70 // individual media streams
71 } ASFMainHeader;
72
73
74 typedef struct {
75 uint32_t packet_number;
76 uint16_t packet_count;
77 } ASFIndex;
78
79
80 typedef struct {
81 uint32_t seqno;
82 unsigned int packet_size;
83 int is_streamed;
84 int asfid2avid[128]; /* conversion table from asf ID 2 AVStream ID */
85 ASFStream streams[128]; /* it's max number and it's not that big */
86 /* non streamed additonnal info */
87 int64_t nb_packets;
88 int64_t duration; /* in 100ns units */
89 /* packet filling */
90 unsigned char multi_payloads_present;
91 int packet_size_left;
92 int prev_packet_sent_time;
93 int packet_timestamp_start;
94 int packet_timestamp_end;
95 unsigned int packet_nb_payloads;
96 int packet_nb_frames;
97 uint8_t packet_buf[PACKET_SIZE];
98 ByteIOContext pb;
99 /* only for reading */
100 uint64_t data_offset; /* begining of the first data packet */
101 uint64_t data_object_offset; /* data object offset (excl. GUID & size)*/
102 uint64_t data_object_size; /* size of the data object */
103
104 ASFMainHeader hdr;
105
106 int packet_flags;
107 int packet_property;
108 int packet_timestamp;
109 int packet_segsizetype;
110 int packet_segments;
111 int packet_seq;
112 int packet_replic_size;
113 int packet_key_frame;
114 int packet_padsize;
115 int packet_frag_offset;
116 int packet_frag_size;
117 int packet_frag_timestamp;
118 int packet_multi_size;
119 int packet_obj_size;
120 int packet_time_delta;
121 int packet_time_start;
122 int64_t packet_pos;
123
124 int stream_index;
125
126
127 int64_t last_indexed_pts;
128 ASFIndex* index_ptr;
129 uint32_t nb_index_count;
130 uint32_t nb_index_memory_alloc;
131 uint16_t maximum_packet;
132
133 ASFStream* asf_st; /* currently decoded stream */
134 } ASFContext;
135
136 static const GUID asf_header = {
137 0x75B22630, 0x668E, 0x11CF, { 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C },
138 };
139
140 static const GUID file_header = {
141 0x8CABDCA1, 0xA947, 0x11CF, { 0x8E, 0xE4, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 },
142 };
143
144 static const GUID stream_header = {
145 0xB7DC0791, 0xA9B7, 0x11CF, { 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 },
146 };
147
148 static const GUID ext_stream_header = {
149 0x14E6A5CB, 0xC672, 0x4332, { 0x83, 0x99, 0xA9, 0x69, 0x52, 0x06, 0x5B, 0x5A },
150 };
151
152 static const GUID audio_stream = {
153 0xF8699E40, 0x5B4D, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },
154 };
155
156 static const GUID audio_conceal_none = {
157 // 0x49f1a440, 0x4ece, 0x11d0, { 0xa3, 0xac, 0x00, 0xa0, 0xc9, 0x03, 0x48, 0xf6 },
158 // New value lifted from avifile
159 0x20fb5700, 0x5b55, 0x11cf, { 0xa8, 0xfd, 0x00, 0x80, 0x5f, 0x5c, 0x44, 0x2b },
160 };
161
162 static const GUID audio_conceal_spread = {
163 0xBFC3CD50, 0x618F, 0x11CF, { 0x8B, 0xB2, 0x00, 0xAA, 0x00, 0xB4, 0xE2, 0x20 },
164 };
165
166 static const GUID video_stream = {
167 0xBC19EFC0, 0x5B4D, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },
168 };
169
170 static const GUID video_conceal_none = {
171 0x20FB5700, 0x5B55, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },
172 };
173
174 static const GUID command_stream = {
175 0x59DACFC0, 0x59E6, 0x11D0, { 0xA3, 0xAC, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 },
176 };
177
178 static const GUID comment_header = {
179 0x75b22633, 0x668e, 0x11cf, { 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c },
180 };
181
182 static const GUID codec_comment_header = {
183 0x86D15240, 0x311D, 0x11D0, { 0xA3, 0xA4, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 },
184 };
185 static const GUID codec_comment1_header = {
186 0x86d15241, 0x311d, 0x11d0, { 0xa3, 0xa4, 0x00, 0xa0, 0xc9, 0x03, 0x48, 0xf6 },
187 };
188
189 static const GUID data_header = {
190 0x75b22636, 0x668e, 0x11cf, { 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c },
191 };
192
193 static const GUID head1_guid = {
194 0x5fbf03b5, 0xa92e, 0x11cf, { 0x8e, 0xe3, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65 },
195 };
196
197 static const GUID head2_guid = {
198 0xabd3d211, 0xa9ba, 0x11cf, { 0x8e, 0xe6, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65 },
199 };
200
201 static const GUID extended_content_header = {
202 0xD2D0A440, 0xE307, 0x11D2, { 0x97, 0xF0, 0x00, 0xA0, 0xC9, 0x5E, 0xA8, 0x50 },
203 };
204
205 static const GUID simple_index_header = {
206 0x33000890, 0xE5B1, 0x11CF, { 0x89, 0xF4, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xCB },
207 };
208
209 static const GUID ext_stream_embed_stream_header = {
210 0x3afb65e2, 0x47ef, 0x40f2, { 0xac, 0x2c, 0x70, 0xa9, 0x0d, 0x71, 0xd3, 0x43}
211 };
212
213 static const GUID ext_stream_audio_stream = {
214 0x31178c9d, 0x03e1, 0x4528, { 0xb5, 0x82, 0x3d, 0xf9, 0xdb, 0x22, 0xf5, 0x03}
215 };
216
217 /* I am not a number !!! This GUID is the one found on the PC used to
218 generate the stream */
219 static const GUID my_guid = {
220 0, 0, 0, { 0, 0, 0, 0, 0, 0, 0, 0 },
221 };
222
223 #define ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT 0x80 //1000 0000
224
225
226 // ASF data packet structure
227 // =========================
228 //
229 //
230 // -----------------------------------
231 // | Error Correction Data | Optional
232 // -----------------------------------
233 // | Payload Parsing Information (PPI) |
234 // -----------------------------------
235 // | Payload Data |
236 // -----------------------------------
237 // | Padding Data |
238 // -----------------------------------
239
240
241 // PPI_FLAG - Payload parsing information flags
242 #define ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT 1
243
244 #define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_BYTE 0x02 //0000 0010
245 #define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_WORD 0x04 //0000 0100
246 #define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_DWORD 0x06 //0000 0110
247 #define ASF_PPI_MASK_SEQUENCE_FIELD_SIZE 0x06 //0000 0110
248
249 #define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE 0x08 //0000 1000
250 #define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD 0x10 //0001 0000
251 #define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_DWORD 0x18 //0001 1000
252 #define ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE 0x18 //0001 1000
253
254 #define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_BYTE 0x20 //0010 0000
255 #define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_WORD 0x40 //0100 0000
256 #define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_DWORD 0x60 //0110 0000
257 #define ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE 0x60 //0110 0000
258
259 // PL_FLAG - Payload flags
260 #define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE 0x01 //0000 0001
261 #define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_WORD 0x02 //0000 0010
262 #define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_DWORD 0x03 //0000 0011
263 #define ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE 0x03 //0000 0011
264
265 #define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_BYTE 0x04 //0000 0100
266 #define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_WORD 0x08 //0000 1000
267 #define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD 0x0c //0000 1100
268 #define ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE 0x0c //0000 1100
269
270 #define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE 0x10 //0001 0000
271 #define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_WORD 0x20 //0010 0000
272 #define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_DWORD 0x30 //0011 0000
273 #define ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE 0x30 //0011 0000
274
275 #define ASF_PL_FLAG_STREAM_NUMBER_LENGTH_FIELD_IS_BYTE 0x40 //0100 0000
276 #define ASF_PL_MASK_STREAM_NUMBER_LENGTH_FIELD_SIZE 0xc0 //1100 0000
277
278 #define ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_BYTE 0x40 //0100 0000
279 #define ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD 0x80 //1000 0000
280 #define ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE 0xc0 //1100 0000
281
282 #define ASF_PL_FLAG_KEY_FRAME 0x80 //1000 0000