/* * 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. * */ #ifndef _DMXDEV_H_ #define _DMXDEV_H_ #include <linux/types.h> #include <linux/spinlock.h> #include <linux/time.h> #include <linux/timer.h> #include <linux/wait.h> #include <linux/fs.h> #include <linux/string.h> #include <linux/mutex.h> #include <linux/slab.h> #include <linux/dvb/dmx.h> #include <media/dvbdev.h> #include <media/demux.h> #include <media/dvb_ringbuffer.h> #include <media/dvb_vb2.h> /** * 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_feed { u16 pid; struct dmx_ts_feed *ts; struct list_head next; }; /** * 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; enum dmxdev_type type; enum dmxdev_state state; struct dmxdev *dev; struct dvb_ringbuffer buffer; struct dvb_vb2_ctx vb2_ctx; struct mutex mutex; /* 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; struct dmxdev_filter *filter; struct dmx_demux *demux; int filternum; int capabilities; unsigned int may_do_mmap:1; unsigned int exit:1; #define DMXDEV_CAP_DUPLEX 1 struct dmx_frontend *dvr_orig_fe; struct dvb_ringbuffer dvr_buffer; #define DVR_BUFFER_SIZE (10*188*1024) struct dvb_vb2_ctx dvr_vb2_ctx; struct mutex mutex; spinlock_t lock; }; /** * 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); #endif /* _DMXDEV_H_ */
