1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
|
/*
* demux.h
*
* Copyright (c) 2002 Convergence GmbH
*
* based on code:
* Copyright (c) 2000 Nokia Research Center
* Tampere, FINLAND
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*/
#ifndef __DEMUX_H
#define __DEMUX_H
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/list.h>
#include <linux/time.h>
#include <linux/dvb/dmx.h>
/*--------------------------------------------------------------------------*/
/* Common definitions */
/*--------------------------------------------------------------------------*/
/*
* DMX_MAX_FILTER_SIZE: Maximum length (in bytes) of a section/PES filter.
*/
#ifndef DMX_MAX_FILTER_SIZE
#define DMX_MAX_FILTER_SIZE 18
#endif
/*
* DMX_MAX_SECFEED_SIZE: Maximum length (in bytes) of a private section feed filter.
*/
#ifndef DMX_MAX_SECFEED_SIZE
#define DMX_MAX_SECFEED_SIZE 4096
#endif
/*
* enum dmx_success: Success codes for the Demux Callback API.
*/
enum dmx_success {
DMX_OK = 0, /* Received Ok */
DMX_LENGTH_ERROR, /* Incorrect length */
DMX_OVERRUN_ERROR, /* Receiver ring buffer overrun */
DMX_CRC_ERROR, /* Incorrect CRC */
DMX_FRAME_ERROR, /* Frame alignment error */
DMX_FIFO_ERROR, /* Receiver FIFO overrun */
DMX_MISSED_ERROR /* Receiver missed packet */
} ;
/*--------------------------------------------------------------------------*/
/* TS packet reception */
/*--------------------------------------------------------------------------*/
/* TS filter type for set() */
#define TS_PACKET 1 /* send TS packets (188 bytes) to callback (default) */
#define TS_PAYLOAD_ONLY 2 /* in case TS_PACKET is set, only send the TS
payload (<=184 bytes per packet) to callback */
#define TS_DECODER 4 /* send stream to built-in decoder (if present) */
/* PES type for filters which write to built-in decoder */
/* these should be kept identical to the types in dmx.h */
enum dmx_ts_pes
{ /* also send packets to decoder (if it exists) */
DMX_TS_PES_AUDIO0,
DMX_TS_PES_VIDEO0,
DMX_TS_PES_TELETEXT0,
DMX_TS_PES_SUBTITLE0,
DMX_TS_PES_PCR0,
DMX_TS_PES_AUDIO1,
DMX_TS_PES_VIDEO1,
DMX_TS_PES_TELETEXT1,
DMX_TS_PES_SUBTITLE1,
DMX_TS_PES_PCR1,
DMX_TS_PES_AUDIO2,
DMX_TS_PES_VIDEO2,
DMX_TS_PES_TELETEXT2,
DMX_TS_PES_SUBTITLE2,
DMX_TS_PES_PCR2,
DMX_TS_PES_AUDIO3,
DMX_TS_PES_VIDEO3,
DMX_TS_PES_TELETEXT3,
DMX_TS_PES_SUBTITLE3,
DMX_TS_PES_PCR3,
DMX_TS_PES_OTHER
};
#define DMX_TS_PES_AUDIO DMX_TS_PES_AUDIO0
#define DMX_TS_PES_VIDEO DMX_TS_PES_VIDEO0
#define DMX_TS_PES_TELETEXT DMX_TS_PES_TELETEXT0
#define DMX_TS_PES_SUBTITLE DMX_TS_PES_SUBTITLE0
#define DMX_TS_PES_PCR DMX_TS_PES_PCR0
struct dmx_ts_feed {
int is_filtering; /* Set to non-zero when filtering in progress */
struct dmx_demux *parent; /* Back-pointer */
void *priv; /* Pointer to private data of the API client */
int (*set) (struct dmx_ts_feed *feed,
u16 pid,
int type,
enum dmx_ts_pes pes_type,
size_t circular_buffer_size,
struct timespec timeout);
int (*start_filtering) (struct dmx_ts_feed* feed);
int (*stop_filtering) (struct dmx_ts_feed* feed);
};
/*--------------------------------------------------------------------------*/
/* Section reception */
/*--------------------------------------------------------------------------*/
struct dmx_section_filter {
u8 filter_value [DMX_MAX_FILTER_SIZE];
u8 filter_mask [DMX_MAX_FILTER_SIZE];
u8 filter_mode [DMX_MAX_FILTER_SIZE];
struct dmx_section_feed* parent; /* Back-pointer */
void* priv; /* Pointer to private data of the API client */
};
struct dmx_section_feed {
int is_filtering; /* Set to non-zero when filtering in progress */
struct dmx_demux* parent; /* Back-pointer */
void* priv; /* Pointer to private data of the API client */
int check_crc;
u32 crc_val;
u8 *secbuf;
u8 secbuf_base[DMX_MAX_SECFEED_SIZE];
u16 secbufp, seclen, tsfeedp;
int (*set) (struct dmx_section_feed* feed,
u16 pid,
size_t circular_buffer_size,
int check_crc);
int (*allocate_filter) (struct dmx_section_feed* feed,
struct dmx_section_filter** filter);
int (*release_filter) (struct dmx_section_feed* feed,
struct dmx_section_filter* filter);
int (*start_filtering) (struct dmx_section_feed* feed);
int (*stop_filtering) (struct dmx_section_feed* feed);
};
/*--------------------------------------------------------------------------*/
/* Callback functions */
/*--------------------------------------------------------------------------*/
typedef int (*dmx_ts_cb) ( const u8 * buffer1,
size_t buffer1_length,
const u8 * buffer2,
size_t buffer2_length,
struct dmx_ts_feed* source,
enum dmx_success success);
typedef int (*dmx_section_cb) ( const u8 * buffer1,
size_t buffer1_len,
const u8 * buffer2,
size_t buffer2_len,
struct dmx_section_filter * source,
enum dmx_success success);
/*--------------------------------------------------------------------------*/
/* DVB Front-End */
/*--------------------------------------------------------------------------*/
enum dmx_frontend_source {
DMX_MEMORY_FE,
DMX_FRONTEND_0,
DMX_FRONTEND_1,
DMX_FRONTEND_2,
DMX_FRONTEND_3,
DMX_STREAM_0, /* external stream input, e.g. LVDS */
DMX_STREAM_1,
DMX_STREAM_2,
DMX_STREAM_3
};
struct dmx_frontend {
struct list_head connectivity_list; /* List of front-ends that can
be connected to a particular
demux */
enum dmx_frontend_source source;
};
/*--------------------------------------------------------------------------*/
/* MPEG-2 TS Demux */
/*--------------------------------------------------------------------------*/
/*
* Flags OR'ed in the capabilites field of struct dmx_demux.
*/
#define DMX_TS_FILTERING 1
#define DMX_PES_FILTERING 2
#define DMX_SECTION_FILTERING 4
#define DMX_MEMORY_BASED_FILTERING 8 /* write() available */
#define DMX_CRC_CHECKING 16
#define DMX_TS_DESCRAMBLING 32
/*
* Demux resource type identifier.
*/
/*
* DMX_FE_ENTRY(): Casts elements in the list of registered
* front-ends from the generic type struct list_head
* to the type * struct dmx_frontend
*.
*/
#define DMX_FE_ENTRY(list) list_entry(list, struct dmx_frontend, connectivity_list)
struct dmx_demux {
u32 capabilities; /* Bitfield of capability flags */
struct dmx_frontend* frontend; /* Front-end connected to the demux */
void* priv; /* Pointer to private data of the API client */
int (*open) (struct dmx_demux* demux);
int (*close) (struct dmx_demux* demux);
int (*write) (struct dmx_demux* demux, const char* buf, size_t count);
int (*allocate_ts_feed) (struct dmx_demux* demux,
struct dmx_ts_feed** feed,
dmx_ts_cb callback);
int (*release_ts_feed) (struct dmx_demux* demux,
struct dmx_ts_feed* feed);
int (*allocate_section_feed) (struct dmx_demux* demux,
struct dmx_section_feed** feed,
dmx_section_cb callback);
int (*release_section_feed) (struct dmx_demux* demux,
struct dmx_section_feed* feed);
int (*add_frontend) (struct dmx_demux* demux,
struct dmx_frontend* frontend);
int (*remove_frontend) (struct dmx_demux* demux,
struct dmx_frontend* frontend);
struct list_head* (*get_frontends) (struct dmx_demux* demux);
int (*connect_frontend) (struct dmx_demux* demux,
struct dmx_frontend* frontend);
int (*disconnect_frontend) (struct dmx_demux* demux);
int (*get_pes_pids) (struct dmx_demux* demux, u16 *pids);
int (*get_caps) (struct dmx_demux* demux, struct dmx_caps *caps);
int (*set_source) (struct dmx_demux* demux, const dmx_source_t *src);
int (*get_stc) (struct dmx_demux* demux, unsigned int num,
u64 *stc, unsigned int *base);
};
#endif /* #ifndef __DEMUX_H */
|
