/* * dmxdev.h * * Copyright (C) 2000 Ralph Metzler & Marcus Metzler * for convergence integrated media GmbH * * 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. *
*/
/** * enum dmxdev_type - type of demux filter type. * * @DMXDEV_TYPE_NONE: no filter set. * @DMXDEV_TYPE_SEC: section filter. * @DMXDEV_TYPE_PES: Program Elementary Stream (PES) filter.
*/ enum dmxdev_type {
DMXDEV_TYPE_NONE,
DMXDEV_TYPE_SEC,
DMXDEV_TYPE_PES,
};
/** * enum dmxdev_state - state machine for the dmxdev. * * @DMXDEV_STATE_FREE: indicates that the filter is freed. * @DMXDEV_STATE_ALLOCATED: indicates that the filter was allocated * to be used. * @DMXDEV_STATE_SET: indicates that the filter parameters are set. * @DMXDEV_STATE_GO: indicates that the filter is running. * @DMXDEV_STATE_DONE: indicates that a packet was already filtered * and the filter is now disabled. * Set only if %DMX_ONESHOT. See * &dmx_sct_filter_params. * @DMXDEV_STATE_TIMEDOUT: Indicates a timeout condition.
*/ enum dmxdev_state {
DMXDEV_STATE_FREE,
DMXDEV_STATE_ALLOCATED,
DMXDEV_STATE_SET,
DMXDEV_STATE_GO,
DMXDEV_STATE_DONE,
DMXDEV_STATE_TIMEDOUT
};
/** * struct dmxdev_feed - digital TV dmxdev feed * * @pid: Program ID to be filtered * @ts: pointer to &struct dmx_ts_feed * @next: &struct list_head pointing to the next feed.
*/
/** * struct dmxdev_filter - digital TV dmxdev filter * * @filter: a union describing a dmxdev filter. * Currently used only for section filters. * @filter.sec: a &struct dmx_section_filter pointer. * For section filter only. * @feed: a union describing a dmxdev feed. * Depending on the filter type, it can be either * @feed.ts or @feed.sec. * @feed.ts: a &struct list_head list. * For TS and PES feeds. * @feed.sec: a &struct dmx_section_feed pointer. * For section feed only. * @params: a union describing dmxdev filter parameters. * Depending on the filter type, it can be either * @params.sec or @params.pes. * @params.sec: a &struct dmx_sct_filter_params embedded struct. * For section filter only. * @params.pes: a &struct dmx_pes_filter_params embedded struct. * For PES filter only. * @type: type of the dmxdev filter, as defined by &enum dmxdev_type. * @state: state of the dmxdev filter, as defined by &enum dmxdev_state. * @dev: pointer to &struct dmxdev. * @buffer: an embedded &struct dvb_ringbuffer buffer. * @vb2_ctx: control struct for VB2 handler * @mutex: protects the access to &struct dmxdev_filter. * @timer: &struct timer_list embedded timer, used to check for * feed timeouts. * Only for section filter. * @todo: index for the @secheader. * Only for section filter. * @secheader: buffer cache to parse the section header. * Only for section filter.
*/ struct dmxdev_filter { union { struct dmx_section_filter *sec;
} filter;
union { /* list of TS and PES feeds (struct dmxdev_feed) */ struct list_head ts; struct dmx_section_feed *sec;
} feed;
union { struct dmx_sct_filter_params sec; struct dmx_pes_filter_params pes;
} params;
/* only for sections */ struct timer_list timer; int todo;
u8 secheader[3];
};
/** * struct dmxdev - Describes a digital TV demux device. * * @dvbdev: pointer to &struct dvb_device associated with * the demux device node. * @dvr_dvbdev: pointer to &struct dvb_device associated with * the dvr device node. * @filter: pointer to &struct dmxdev_filter. * @demux: pointer to &struct dmx_demux. * @filternum: number of filters. * @capabilities: demux capabilities as defined by &enum dmx_demux_caps. * @may_do_mmap: flag used to indicate if the device may do mmap. * @exit: flag to indicate that the demux is being released. * @dvr_orig_fe: pointer to &struct dmx_frontend. * @dvr_buffer: embedded &struct dvb_ringbuffer for DVB output. * @dvr_vb2_ctx: control struct for VB2 handler * @mutex: protects the usage of this structure. * @lock: protects access to &dmxdev->filter->data.
*/ struct dmxdev { struct dvb_device *dvbdev; struct dvb_device *dvr_dvbdev;
/** * dvb_dmxdev_init - initializes a digital TV demux and registers both demux * and DVR devices. * * @dmxdev: pointer to &struct dmxdev. * @adap: pointer to &struct dvb_adapter.
*/ int dvb_dmxdev_init(struct dmxdev *dmxdev, struct dvb_adapter *adap);
/** * dvb_dmxdev_release - releases a digital TV demux and unregisters it. * * @dmxdev: pointer to &struct dmxdev.
*/ void dvb_dmxdev_release(struct dmxdev *dmxdev);
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