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1da177e4 LT |
1 | /* |
2 | * dvb_demux.h: DVB kernel demux API | |
3 | * | |
4 | * Copyright (C) 2000-2001 Marcus Metzler & Ralph Metzler | |
5 | * for convergence integrated media GmbH | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU Lesser General Public License | |
9 | * as published by the Free Software Foundation; either version 2.1 | |
10 | * of the License, or (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
1da177e4 LT |
17 | */ |
18 | ||
1da177e4 LT |
19 | #ifndef _DVB_DEMUX_H_ |
20 | #define _DVB_DEMUX_H_ | |
21 | ||
22 | #include <linux/time.h> | |
23 | #include <linux/timer.h> | |
24 | #include <linux/spinlock.h> | |
3593cab5 | 25 | #include <linux/mutex.h> |
1da177e4 | 26 | |
fada1935 | 27 | #include <media/demux.h> |
1da177e4 | 28 | |
0463625e MCC |
29 | /** |
30 | * enum dvb_dmx_filter_type - type of demux feed. | |
31 | * | |
32 | * @DMX_TYPE_TS: feed is in TS mode. | |
33 | * @DMX_TYPE_SEC: feed is in Section mode. | |
34 | */ | |
35 | enum dvb_dmx_filter_type { | |
36 | DMX_TYPE_TS, | |
37 | DMX_TYPE_SEC, | |
38 | }; | |
1da177e4 | 39 | |
999f3d25 MCC |
40 | /** |
41 | * enum dvb_dmx_state - state machine for a demux filter. | |
42 | * | |
43 | * @DMX_STATE_FREE: indicates that the filter is freed. | |
44 | * @DMX_STATE_ALLOCATED: indicates that the filter was allocated | |
45 | * to be used. | |
46 | * @DMX_STATE_READY: indicates that the filter is ready | |
47 | * to be used. | |
48 | * @DMX_STATE_GO: indicates that the filter is running. | |
49 | */ | |
50 | enum dvb_dmx_state { | |
51 | DMX_STATE_FREE, | |
52 | DMX_STATE_ALLOCATED, | |
53 | DMX_STATE_READY, | |
54 | DMX_STATE_GO, | |
55 | }; | |
1da177e4 LT |
56 | |
57 | #define DVB_DEMUX_MASK_MAX 18 | |
58 | ||
0d834635 AO |
59 | #define MAX_PID 0x1fff |
60 | ||
26b9d6c0 AO |
61 | #define SPEED_PKTS_INTERVAL 50000 |
62 | ||
e5c4be82 MCC |
63 | /** |
64 | * struct dvb_demux_filter - Describes a DVB demux section filter. | |
65 | * | |
66 | * @filter: Section filter as defined by &struct dmx_section_filter. | |
67 | * @maskandmode: logical ``and`` bit mask. | |
68 | * @maskandnotmode: logical ``and not`` bit mask. | |
69 | * @doneq: flag that indicates when a filter is ready. | |
70 | * @next: pointer to the next section filter. | |
71 | * @feed: &struct dvb_demux_feed pointer. | |
72 | * @index: index of the used demux filter. | |
73 | * @state: state of the filter as described by &enum dvb_dmx_state. | |
74 | * @type: type of the filter as described | |
75 | * by &enum dvb_dmx_filter_type. | |
76 | */ | |
77 | ||
1da177e4 | 78 | struct dvb_demux_filter { |
dad4a730 AO |
79 | struct dmx_section_filter filter; |
80 | u8 maskandmode[DMX_MAX_FILTER_SIZE]; | |
81 | u8 maskandnotmode[DMX_MAX_FILTER_SIZE]; | |
392cc7af | 82 | bool doneq; |
1da177e4 | 83 | |
dad4a730 AO |
84 | struct dvb_demux_filter *next; |
85 | struct dvb_demux_feed *feed; | |
86 | int index; | |
999f3d25 | 87 | enum dvb_dmx_state state; |
0463625e | 88 | enum dvb_dmx_filter_type type; |
1da177e4 | 89 | |
e5c4be82 | 90 | /* private: used only by av7110 */ |
dad4a730 | 91 | u16 hw_handle; |
1da177e4 LT |
92 | }; |
93 | ||
e5c4be82 MCC |
94 | /** |
95 | * struct dvb_demux_feed - describes a DVB field | |
96 | * | |
8db044b2 MCC |
97 | * @feed: a union describing a digital TV feed. |
98 | * Depending on the feed type, it can be either | |
99 | * @feed.ts or @feed.sec. | |
100 | * @feed.ts: a &struct dmx_ts_feed pointer. | |
101 | * For TS feed only. | |
102 | * @feed.sec: a &struct dmx_section_feed pointer. | |
103 | * For section feed only. | |
104 | * @cb: a union describing digital TV callbacks. | |
105 | * Depending on the feed type, it can be either | |
106 | * @cb.ts or @cb.sec. | |
107 | * @cb.ts: a dmx_ts_cb() calback function pointer. | |
108 | * For TS feed only. | |
109 | * @cb.sec: a dmx_section_cb() callback function pointer. | |
110 | * For section feed only. | |
e5c4be82 | 111 | * @demux: pointer to &struct dvb_demux. |
198688cd | 112 | * @priv: private data that can optionally be used by a DVB driver. |
e5c4be82 MCC |
113 | * @type: type of the filter, as defined by &enum dvb_dmx_filter_type. |
114 | * @state: state of the filter as defined by &enum dvb_dmx_state. | |
115 | * @pid: PID to be filtered. | |
116 | * @timeout: feed timeout. | |
117 | * @filter: pointer to &struct dvb_demux_filter. | |
fdbeb962 MCC |
118 | * @buffer_flags: Buffer flags used to report discontinuity users via DVB |
119 | * memory mapped API, as defined by &enum dmx_buffer_flags. | |
e5c4be82 MCC |
120 | * @ts_type: type of TS, as defined by &enum ts_filter_type. |
121 | * @pes_type: type of PES, as defined by &enum dmx_ts_pes. | |
122 | * @cc: MPEG-TS packet continuity counter | |
123 | * @pusi_seen: if true, indicates that a discontinuity was detected. | |
124 | * it is used to prevent feeding of garbage from previous section. | |
125 | * @peslen: length of the PES (Packet Elementary Stream). | |
126 | * @list_head: head for the list of digital TV demux feeds. | |
127 | * @index: a unique index for each feed. Can be used as hardware | |
128 | * pid filter index. | |
e5c4be82 | 129 | */ |
1da177e4 | 130 | struct dvb_demux_feed { |
dad4a730 AO |
131 | union { |
132 | struct dmx_ts_feed ts; | |
133 | struct dmx_section_feed sec; | |
1da177e4 LT |
134 | } feed; |
135 | ||
dad4a730 AO |
136 | union { |
137 | dmx_ts_cb ts; | |
138 | dmx_section_cb sec; | |
1da177e4 LT |
139 | } cb; |
140 | ||
dad4a730 | 141 | struct dvb_demux *demux; |
1da177e4 | 142 | void *priv; |
0463625e | 143 | enum dvb_dmx_filter_type type; |
999f3d25 | 144 | enum dvb_dmx_state state; |
dad4a730 | 145 | u16 pid; |
1da177e4 | 146 | |
e95be158 | 147 | ktime_t timeout; |
dad4a730 | 148 | struct dvb_demux_filter *filter; |
1da177e4 | 149 | |
fdbeb962 MCC |
150 | u32 buffer_flags; |
151 | ||
4bc8525a | 152 | enum ts_filter_type ts_type; |
dad4a730 | 153 | enum dmx_ts_pes pes_type; |
1da177e4 | 154 | |
dad4a730 | 155 | int cc; |
e5c4be82 | 156 | bool pusi_seen; |
1da177e4 | 157 | |
dad4a730 | 158 | u16 peslen; |
1da177e4 LT |
159 | |
160 | struct list_head list_head; | |
e5c4be82 | 161 | unsigned int index; |
1da177e4 LT |
162 | }; |
163 | ||
198688cd MCC |
164 | /** |
165 | * struct dvb_demux - represents a digital TV demux | |
166 | * @dmx: embedded &struct dmx_demux with demux capabilities | |
167 | * and callbacks. | |
168 | * @priv: private data that can optionally be used by | |
169 | * a DVB driver. | |
170 | * @filternum: maximum amount of DVB filters. | |
171 | * @feednum: maximum amount of DVB feeds. | |
172 | * @start_feed: callback routine to be called in order to start | |
173 | * a DVB feed. | |
174 | * @stop_feed: callback routine to be called in order to stop | |
175 | * a DVB feed. | |
176 | * @write_to_decoder: callback routine to be called if the feed is TS and | |
177 | * it is routed to an A/V decoder, when a new TS packet | |
178 | * is received. | |
179 | * Used only on av7110-av.c. | |
180 | * @check_crc32: callback routine to check CRC. If not initialized, | |
181 | * dvb_demux will use an internal one. | |
182 | * @memcopy: callback routine to memcopy received data. | |
183 | * If not initialized, dvb_demux will default to memcpy(). | |
184 | * @users: counter for the number of demux opened file descriptors. | |
185 | * Currently, it is limited to 10 users. | |
186 | * @filter: pointer to &struct dvb_demux_filter. | |
187 | * @feed: pointer to &struct dvb_demux_feed. | |
188 | * @frontend_list: &struct list_head with frontends used by the demux. | |
189 | * @pesfilter: array of &struct dvb_demux_feed with the PES types | |
190 | * that will be filtered. | |
191 | * @pids: list of filtered program IDs. | |
192 | * @feed_list: &struct list_head with feeds. | |
193 | * @tsbuf: temporary buffer used internally to store TS packets. | |
194 | * @tsbufp: temporary buffer index used internally. | |
195 | * @mutex: pointer to &struct mutex used to protect feed set | |
196 | * logic. | |
197 | * @lock: pointer to &spinlock_t, used to protect buffer handling. | |
198 | * @cnt_storage: buffer used for TS/TEI continuity check. | |
199 | * @speed_last_time: &ktime_t used for TS speed check. | |
200 | * @speed_pkts_cnt: packets count used for TS speed check. | |
201 | */ | |
1da177e4 | 202 | struct dvb_demux { |
dad4a730 AO |
203 | struct dmx_demux dmx; |
204 | void *priv; | |
205 | int filternum; | |
206 | int feednum; | |
207 | int (*start_feed)(struct dvb_demux_feed *feed); | |
208 | int (*stop_feed)(struct dvb_demux_feed *feed); | |
209 | int (*write_to_decoder)(struct dvb_demux_feed *feed, | |
1da177e4 | 210 | const u8 *buf, size_t len); |
dad4a730 | 211 | u32 (*check_crc32)(struct dvb_demux_feed *feed, |
1da177e4 | 212 | const u8 *buf, size_t len); |
dad4a730 | 213 | void (*memcopy)(struct dvb_demux_feed *feed, u8 *dst, |
1da177e4 LT |
214 | const u8 *src, size_t len); |
215 | ||
dad4a730 | 216 | int users; |
1da177e4 | 217 | #define MAX_DVB_DEMUX_USERS 10 |
dad4a730 AO |
218 | struct dvb_demux_filter *filter; |
219 | struct dvb_demux_feed *feed; | |
1da177e4 | 220 | |
dad4a730 | 221 | struct list_head frontend_list; |
1da177e4 | 222 | |
fde04ab9 MCC |
223 | struct dvb_demux_feed *pesfilter[DMX_PES_OTHER]; |
224 | u16 pids[DMX_PES_OTHER]; | |
1da177e4 LT |
225 | |
226 | #define DMX_MAX_PID 0x2000 | |
227 | struct list_head feed_list; | |
dad4a730 AO |
228 | u8 tsbuf[204]; |
229 | int tsbufp; | |
1da177e4 | 230 | |
3593cab5 | 231 | struct mutex mutex; |
1da177e4 | 232 | spinlock_t lock; |
0d834635 AO |
233 | |
234 | uint8_t *cnt_storage; /* for TS continuity check */ | |
26b9d6c0 | 235 | |
e95be158 | 236 | ktime_t speed_last_time; /* for TS speed check */ |
26b9d6c0 | 237 | uint32_t speed_pkts_cnt; /* for TS speed check */ |
198688cd MCC |
238 | |
239 | /* private: used only on av7110 */ | |
240 | int playing; | |
241 | int recording; | |
1da177e4 LT |
242 | }; |
243 | ||
6128a68d MCC |
244 | /** |
245 | * dvb_dmx_init - initialize a digital TV demux struct. | |
246 | * | |
247 | * @demux: &struct dvb_demux to be initialized. | |
248 | * | |
249 | * Before being able to register a digital TV demux struct, drivers | |
250 | * should call this routine. On its typical usage, some fields should | |
251 | * be initialized at the driver before calling it. | |
252 | * | |
253 | * A typical usecase is:: | |
254 | * | |
255 | * dvb->demux.dmx.capabilities = | |
256 | * DMX_TS_FILTERING | DMX_SECTION_FILTERING | | |
257 | * DMX_MEMORY_BASED_FILTERING; | |
258 | * dvb->demux.priv = dvb; | |
259 | * dvb->demux.filternum = 256; | |
260 | * dvb->demux.feednum = 256; | |
261 | * dvb->demux.start_feed = driver_start_feed; | |
262 | * dvb->demux.stop_feed = driver_stop_feed; | |
263 | * ret = dvb_dmx_init(&dvb->demux); | |
264 | * if (ret < 0) | |
265 | * return ret; | |
266 | */ | |
267 | int dvb_dmx_init(struct dvb_demux *demux); | |
268 | ||
269 | /** | |
270 | * dvb_dmx_release - releases a digital TV demux internal buffers. | |
271 | * | |
272 | * @demux: &struct dvb_demux to be released. | |
273 | * | |
274 | * The DVB core internally allocates data at @demux. This routine | |
275 | * releases those data. Please notice that the struct itelf is not | |
276 | * released, as it can be embedded on other structs. | |
277 | */ | |
278 | void dvb_dmx_release(struct dvb_demux *demux); | |
279 | ||
280 | /** | |
281 | * dvb_dmx_swfilter_packets - use dvb software filter for a buffer with | |
282 | * multiple MPEG-TS packets with 188 bytes each. | |
283 | * | |
284 | * @demux: pointer to &struct dvb_demux | |
285 | * @buf: buffer with data to be filtered | |
286 | * @count: number of MPEG-TS packets with size of 188. | |
287 | * | |
288 | * The routine will discard a DVB packet that don't start with 0x47. | |
289 | * | |
290 | * Use this routine if the DVB demux fills MPEG-TS buffers that are | |
291 | * already aligned. | |
292 | * | |
293 | * NOTE: The @buf size should have size equal to ``count * 188``. | |
294 | */ | |
295 | void dvb_dmx_swfilter_packets(struct dvb_demux *demux, const u8 *buf, | |
dad4a730 | 296 | size_t count); |
6128a68d MCC |
297 | |
298 | /** | |
299 | * dvb_dmx_swfilter - use dvb software filter for a buffer with | |
300 | * multiple MPEG-TS packets with 188 bytes each. | |
301 | * | |
302 | * @demux: pointer to &struct dvb_demux | |
303 | * @buf: buffer with data to be filtered | |
304 | * @count: number of MPEG-TS packets with size of 188. | |
305 | * | |
306 | * If a DVB packet doesn't start with 0x47, it will seek for the first | |
307 | * byte that starts with 0x47. | |
308 | * | |
309 | * Use this routine if the DVB demux fill buffers that may not start with | |
310 | * a packet start mark (0x47). | |
311 | * | |
312 | * NOTE: The @buf size should have size equal to ``count * 188``. | |
313 | */ | |
1da177e4 | 314 | void dvb_dmx_swfilter(struct dvb_demux *demux, const u8 *buf, size_t count); |
6128a68d MCC |
315 | |
316 | /** | |
317 | * dvb_dmx_swfilter_204 - use dvb software filter for a buffer with | |
318 | * multiple MPEG-TS packets with 204 bytes each. | |
319 | * | |
320 | * @demux: pointer to &struct dvb_demux | |
321 | * @buf: buffer with data to be filtered | |
322 | * @count: number of MPEG-TS packets with size of 204. | |
323 | * | |
324 | * If a DVB packet doesn't start with 0x47, it will seek for the first | |
325 | * byte that starts with 0x47. | |
326 | * | |
327 | * Use this routine if the DVB demux fill buffers that may not start with | |
328 | * a packet start mark (0x47). | |
329 | * | |
330 | * NOTE: The @buf size should have size equal to ``count * 204``. | |
331 | */ | |
dad4a730 AO |
332 | void dvb_dmx_swfilter_204(struct dvb_demux *demux, const u8 *buf, |
333 | size_t count); | |
6128a68d MCC |
334 | |
335 | /** | |
336 | * dvb_dmx_swfilter_raw - make the raw data available to userspace without | |
337 | * filtering | |
338 | * | |
339 | * @demux: pointer to &struct dvb_demux | |
340 | * @buf: buffer with data | |
341 | * @count: number of packets to be passed. The actual size of each packet | |
342 | * depends on the &dvb_demux->feed->cb.ts logic. | |
343 | * | |
344 | * Use it if the driver needs to deliver the raw payload to userspace without | |
345 | * passing through the kernel demux. That is meant to support some | |
346 | * delivery systems that aren't based on MPEG-TS. | |
347 | * | |
348 | * This function relies on &dvb_demux->feed->cb.ts to actually handle the | |
349 | * buffer. | |
350 | */ | |
8e156702 MK |
351 | void dvb_dmx_swfilter_raw(struct dvb_demux *demux, const u8 *buf, |
352 | size_t count); | |
1da177e4 LT |
353 | |
354 | #endif /* _DVB_DEMUX_H_ */ |