4 * Copyright (c) 2002 Convergence GmbH
7 * Copyright (c) 2000 Nokia Research Center
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Lesser General Public License
12 * as published by the Free Software Foundation; either version 2.1
13 * of the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU Lesser General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
29 #include <linux/types.h>
30 #include <linux/errno.h>
31 #include <linux/list.h>
32 #include <linux/time.h>
33 #include <linux/dvb/dmx.h>
35 /*--------------------------------------------------------------------------*/
36 /* Common definitions */
37 /*--------------------------------------------------------------------------*/
40 * DMX_MAX_FILTER_SIZE: Maximum length (in bytes) of a section/PES filter.
43 #ifndef DMX_MAX_FILTER_SIZE
44 #define DMX_MAX_FILTER_SIZE 18
48 * DMX_MAX_SECFEED_SIZE: Maximum length (in bytes) of a private section feed filter.
51 #ifndef DMX_MAX_SECFEED_SIZE
52 #define DMX_MAX_SECFEED_SIZE 4096
57 * enum dmx_success: Success codes for the Demux Callback API.
61 DMX_OK = 0, /* Received Ok */
62 DMX_LENGTH_ERROR, /* Incorrect length */
63 DMX_OVERRUN_ERROR, /* Receiver ring buffer overrun */
64 DMX_CRC_ERROR, /* Incorrect CRC */
65 DMX_FRAME_ERROR, /* Frame alignment error */
66 DMX_FIFO_ERROR, /* Receiver FIFO overrun */
67 DMX_MISSED_ERROR /* Receiver missed packet */
70 /*--------------------------------------------------------------------------*/
71 /* TS packet reception */
72 /*--------------------------------------------------------------------------*/
74 /* TS filter type for set() */
76 #define TS_PACKET 1 /* send TS packets (188 bytes) to callback (default) */
77 #define TS_PAYLOAD_ONLY 2 /* in case TS_PACKET is set, only send the TS
78 payload (<=184 bytes per packet) to callback */
79 #define TS_DECODER 4 /* send stream to built-in decoder (if present) */
81 /* PES type for filters which write to built-in decoder */
82 /* these should be kept identical to the types in dmx.h */
85 { /* also send packets to decoder (if it exists) */
100 DMX_TS_PES_TELETEXT2,
101 DMX_TS_PES_SUBTITLE2,
106 DMX_TS_PES_TELETEXT3,
107 DMX_TS_PES_SUBTITLE3,
113 #define DMX_TS_PES_AUDIO DMX_TS_PES_AUDIO0
114 #define DMX_TS_PES_VIDEO DMX_TS_PES_VIDEO0
115 #define DMX_TS_PES_TELETEXT DMX_TS_PES_TELETEXT0
116 #define DMX_TS_PES_SUBTITLE DMX_TS_PES_SUBTITLE0
117 #define DMX_TS_PES_PCR DMX_TS_PES_PCR0
121 int is_filtering; /* Set to non-zero when filtering in progress */
122 struct dmx_demux *parent; /* Back-pointer */
123 void *priv; /* Pointer to private data of the API client */
124 int (*set) (struct dmx_ts_feed *feed,
127 enum dmx_ts_pes pes_type,
128 size_t callback_length,
129 size_t circular_buffer_size,
131 struct timespec timeout);
132 int (*start_filtering) (struct dmx_ts_feed* feed);
133 int (*stop_filtering) (struct dmx_ts_feed* feed);
136 /*--------------------------------------------------------------------------*/
137 /* Section reception */
138 /*--------------------------------------------------------------------------*/
140 struct dmx_section_filter {
141 u8 filter_value [DMX_MAX_FILTER_SIZE];
142 u8 filter_mask [DMX_MAX_FILTER_SIZE];
143 u8 filter_mode [DMX_MAX_FILTER_SIZE];
144 struct dmx_section_feed* parent; /* Back-pointer */
145 void* priv; /* Pointer to private data of the API client */
148 struct dmx_section_feed {
149 int is_filtering; /* Set to non-zero when filtering in progress */
150 struct dmx_demux* parent; /* Back-pointer */
151 void* priv; /* Pointer to private data of the API client */
157 u8 secbuf_base[DMX_MAX_SECFEED_SIZE];
158 u16 secbufp, seclen, tsfeedp;
160 int (*set) (struct dmx_section_feed* feed,
162 size_t circular_buffer_size,
165 int (*allocate_filter) (struct dmx_section_feed* feed,
166 struct dmx_section_filter** filter);
167 int (*release_filter) (struct dmx_section_feed* feed,
168 struct dmx_section_filter* filter);
169 int (*start_filtering) (struct dmx_section_feed* feed);
170 int (*stop_filtering) (struct dmx_section_feed* feed);
173 /*--------------------------------------------------------------------------*/
174 /* Callback functions */
175 /*--------------------------------------------------------------------------*/
177 typedef int (*dmx_ts_cb) ( const u8 * buffer1,
178 size_t buffer1_length,
180 size_t buffer2_length,
181 struct dmx_ts_feed* source,
182 enum dmx_success success);
184 typedef int (*dmx_section_cb) ( const u8 * buffer1,
188 struct dmx_section_filter * source,
189 enum dmx_success success);
191 /*--------------------------------------------------------------------------*/
193 /*--------------------------------------------------------------------------*/
195 enum dmx_frontend_source {
201 DMX_STREAM_0, /* external stream input, e.g. LVDS */
207 struct dmx_frontend {
208 struct list_head connectivity_list; /* List of front-ends that can
209 be connected to a particular
211 void* priv; /* Pointer to private data of the API client */
212 enum dmx_frontend_source source;
215 /*--------------------------------------------------------------------------*/
216 /* MPEG-2 TS Demux */
217 /*--------------------------------------------------------------------------*/
220 * Flags OR'ed in the capabilites field of struct dmx_demux.
223 #define DMX_TS_FILTERING 1
224 #define DMX_PES_FILTERING 2
225 #define DMX_SECTION_FILTERING 4
226 #define DMX_MEMORY_BASED_FILTERING 8 /* write() available */
227 #define DMX_CRC_CHECKING 16
228 #define DMX_TS_DESCRAMBLING 32
229 #define DMX_SECTION_PAYLOAD_DESCRAMBLING 64
230 #define DMX_MAC_ADDRESS_DESCRAMBLING 128
233 * Demux resource type identifier.
237 * DMX_FE_ENTRY(): Casts elements in the list of registered
238 * front-ends from the generic type struct list_head
239 * to the type * struct dmx_frontend
243 #define DMX_FE_ENTRY(list) list_entry(list, struct dmx_frontend, connectivity_list)
246 u32 capabilities; /* Bitfield of capability flags */
247 struct dmx_frontend* frontend; /* Front-end connected to the demux */
248 void* priv; /* Pointer to private data of the API client */
249 int users; /* Number of users */
250 int (*open) (struct dmx_demux* demux);
251 int (*close) (struct dmx_demux* demux);
252 int (*write) (struct dmx_demux* demux, const char* buf, size_t count);
253 int (*allocate_ts_feed) (struct dmx_demux* demux,
254 struct dmx_ts_feed** feed,
256 int (*release_ts_feed) (struct dmx_demux* demux,
257 struct dmx_ts_feed* feed);
258 int (*allocate_section_feed) (struct dmx_demux* demux,
259 struct dmx_section_feed** feed,
260 dmx_section_cb callback);
261 int (*release_section_feed) (struct dmx_demux* demux,
262 struct dmx_section_feed* feed);
263 int (*add_frontend) (struct dmx_demux* demux,
264 struct dmx_frontend* frontend);
265 int (*remove_frontend) (struct dmx_demux* demux,
266 struct dmx_frontend* frontend);
267 struct list_head* (*get_frontends) (struct dmx_demux* demux);
268 int (*connect_frontend) (struct dmx_demux* demux,
269 struct dmx_frontend* frontend);
270 int (*disconnect_frontend) (struct dmx_demux* demux);
272 int (*get_pes_pids) (struct dmx_demux* demux, u16 *pids);
274 int (*get_caps) (struct dmx_demux* demux, struct dmx_caps *caps);
276 int (*set_source) (struct dmx_demux* demux, const dmx_source_t *src);
278 int (*get_stc) (struct dmx_demux* demux, unsigned int num,
279 u64 *stc, unsigned int *base);
282 #endif /* #ifndef __DEMUX_H */