1 "lzD qţ h1 +l4( (  fB- "e_I|+?/* * demux.h * * The Kernel Digital TV Demux kABI defines a driver-internal interface for * registering low-level, hardware specific driver to a hardware independent * demux layer. * * 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. * */ #ifndef __DEMUX_H #define __DEMUX_H #include #include #include #include #include /* * 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 /* * TS packet reception */ /** * enum ts_filter_type - filter type bitmap for dmx_ts_feed.set\(\) * * @TS_PACKET: Send TS packets (188 bytes) to callback (default). * @TS_PAYLOAD_ONLY: In case TS_PACKET is set, only send the TS payload * (<=184 bytes per packet) to callback * @TS_DECODER: Send stream to built-in decoder (if present). * @TS_DEMUX: In case TS_PACKET is set, send the TS to the demux * device, not to the dvr device */ enum ts_filter_type { TS_PACKET = 1, TS_PAYLOAD_ONLY = 2, TS_DECODER = 4, TS_DEMUX = 8, }; /** * struct dmx_ts_feed - Structure that contains a TS feed filter * * @is_filtering: Set to non-zero when filtering in progress * @parent: pointer to struct dmx_demux * @priv: pointer to private data of the API client * @set: sets the TS filter * @start_filtering: starts TS filtering * @stop_filtering: stops TS filtering * * A TS feed is typically mapped to a hardware PID filter on the demux chip. * Using this API, the client can set the filtering properties to start/stop * filtering TS packets on a particular TS feed. */ struct dmx_ts_feed { int is_filtering; struct dmx_demux *parent; void *priv; int (*set)(struct dmx_ts_feed *feed, u16 pid, int type, enum dmx_ts_pes pes_type, ktime_t timeout); int (*start_filtering)(struct dmx_ts_feed *feed); int (*stop_filtering)(struct dmx_ts_feed *feed); }; /* * Section reception */ /** * struct dmx_section_filter - Structure that describes a section filter * * @filter_value: Contains up to 16 bytes (128 bits) of the TS section header * that will be matched by the section filter * @filter_mask: Contains a 16 bytes (128 bits) filter mask with the bits * specified by @filter_value that will be used on the filter * match logic. * @filter_mode: Contains a 16 bytes (128 bits) filter mode. * @parent: Back-pointer to struct dmx_section_feed. * @priv: Pointer to private data of the API client. * * * The @filter_mask controls which bits of @filter_value are compared with * the section headers/payload. On a binary value of 1 in filter_mask, the * corresponding bits are compared. The filter only accepts sections that are * equal to filter_value in all the tested bit positions. */ 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; void *priv; }; /** * struct dmx_section_feed - Structure that contains a se