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 circular_buffer_size,
129 struct timespec timeout);
130 int (*start_filtering) (struct dmx_ts_feed* feed);
131 int (*stop_filtering) (struct dmx_ts_feed* feed);
134 /*--------------------------------------------------------------------------*/
135 /* Section reception */
136 /*--------------------------------------------------------------------------*/
138 struct dmx_section_filter {
139 u8 filter_value [DMX_MAX_FILTER_SIZE];
140 u8 filter_mask [DMX_MAX_FILTER_SIZE];
141 u8 filter_mode [DMX_MAX_FILTER_SIZE];
142 struct dmx_section_feed* parent; /* Back-pointer */
143 void* priv; /* Pointer to private data of the API client */
146 struct dmx_section_feed {
147 int is_filtering; /* Set to non-zero when filtering in progress */
148 struct dmx_demux* parent; /* Back-pointer */
149 void* priv; /* Pointer to private data of the API client */
155 u8 secbuf_base[DMX_MAX_SECFEED_SIZE];
156 u16 secbufp, seclen, tsfeedp;
158 int (*set) (struct dmx_section_feed* feed,
160 size_t circular_buffer_size,
162 int (*allocate_filter) (struct dmx_section_feed* feed,
163 struct dmx_section_filter** filter);
164 int (*release_filter) (struct dmx_section_feed* feed,
165 struct dmx_section_filter* filter);
166 int (*start_filtering) (struct dmx_section_feed* feed);
167 int (*stop_filtering) (struct dmx_section_feed* feed);
170 /*--------------------------------------------------------------------------*/
171 /* Callback functions */
172 /*--------------------------------------------------------------------------*/
174 typedef int (*dmx_ts_cb) ( const u8 * buffer1,
175 size_t buffer1_length,
177 size_t buffer2_length,
178 struct dmx_ts_feed* source,
179 enum dmx_success success);
181 typedef int (*dmx_section_cb) ( const u8 * buffer1,
185 struct dmx_section_filter * source,
186 enum dmx_success success);
188 /*--------------------------------------------------------------------------*/
190 /*--------------------------------------------------------------------------*/
192 enum dmx_frontend_source {
198 DMX_STREAM_0, /* external stream input, e.g. LVDS */
204 struct dmx_frontend {
205 struct list_head connectivity_list; /* List of front-ends that can
206 be connected to a particular
208 enum dmx_frontend_source source;
211 /*--------------------------------------------------------------------------*/
212 /* MPEG-2 TS Demux */
213 /*--------------------------------------------------------------------------*/
216 * Flags OR'ed in the capabilites field of struct dmx_demux.
219 #define DMX_TS_FILTERING 1
220 #define DMX_PES_FILTERING 2
221 #define DMX_SECTION_FILTERING 4
222 #define DMX_MEMORY_BASED_FILTERING 8 /* write() available */
223 #define DMX_CRC_CHECKING 16
224 #define DMX_TS_DESCRAMBLING 32
227 * Demux resource type identifier.
231 * DMX_FE_ENTRY(): Casts elements in the list of registered
232 * front-ends from the generic type struct list_head
233 * to the type * struct dmx_frontend
237 #define DMX_FE_ENTRY(list) list_entry(list, struct dmx_frontend, connectivity_list)
240 u32 capabilities; /* Bitfield of capability flags */
241 struct dmx_frontend* frontend; /* Front-end connected to the demux */
242 void* priv; /* Pointer to private data of the API client */
243 int (*open) (struct dmx_demux* demux);
244 int (*close) (struct dmx_demux* demux);
245 int (*write) (struct dmx_demux* demux, const char* buf, size_t count);
246 int (*allocate_ts_feed) (struct dmx_demux* demux,
247 struct dmx_ts_feed** feed,
249 int (*release_ts_feed) (struct dmx_demux* demux,
250 struct dmx_ts_feed* feed);
251 int (*allocate_section_feed) (struct dmx_demux* demux,
252 struct dmx_section_feed** feed,
253 dmx_section_cb callback);
254 int (*release_section_feed) (struct dmx_demux* demux,
255 struct dmx_section_feed* feed);
256 int (*add_frontend) (struct dmx_demux* demux,
257 struct dmx_frontend* frontend);
258 int (*remove_frontend) (struct dmx_demux* demux,
259 struct dmx_frontend* frontend);
260 struct list_head* (*get_frontends) (struct dmx_demux* demux);
261 int (*connect_frontend) (struct dmx_demux* demux,
262 struct dmx_frontend* frontend);
263 int (*disconnect_frontend) (struct dmx_demux* demux);
265 int (*get_pes_pids) (struct dmx_demux* demux, u16 *pids);
267 int (*get_caps) (struct dmx_demux* demux, struct dmx_caps *caps);
269 int (*set_source) (struct dmx_demux* demux, const dmx_source_t *src);
271 int (*get_stc) (struct dmx_demux* demux, unsigned int num,
272 u64 *stc, unsigned int *base);
275 #endif /* #ifndef __DEMUX_H */