diff options
Diffstat (limited to 'drivers/media/dvb-core/demux.h')
| -rw-r--r-- | drivers/media/dvb-core/demux.h | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/drivers/media/dvb-core/demux.h b/drivers/media/dvb-core/demux.h new file mode 100644 index 00000000000..833191bcd81 --- /dev/null +++ b/drivers/media/dvb-core/demux.h @@ -0,0 +1,241 @@ +/* + * 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_SECTION_SIZE +#define DMX_MAX_SECTION_SIZE 4096 +#endif +#ifndef DMX_MAX_SECFEED_SIZE +#define DMX_MAX_SECFEED_SIZE (DMX_MAX_SECTION_SIZE + 188) +#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) */ +#define TS_DEMUX 8 /* in case TS_PACKET is set, send the TS to + the demux device, not to the dvr device */ + +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 capabilities 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 __user *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 */ |