/* * 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 */ /* 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 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 */