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214 lines
5.9 KiB
214 lines
5.9 KiB
/* |
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* dmxdev.h |
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* |
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* Copyright (C) 2000 Ralph Metzler & Marcus Metzler |
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* for convergence integrated media GmbH |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public License |
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* as published by the Free Software Foundation; either version 2.1 |
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* of the License, or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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*/ |
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#ifndef _DMXDEV_H_ |
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#define _DMXDEV_H_ |
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#include <linux/types.h> |
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#include <linux/spinlock.h> |
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#include <linux/kernel.h> |
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#include <linux/time.h> |
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#include <linux/timer.h> |
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#include <linux/wait.h> |
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#include <linux/fs.h> |
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#include <linux/string.h> |
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#include <linux/mutex.h> |
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#include <linux/slab.h> |
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#include <linux/dvb/dmx.h> |
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#include <media/dvbdev.h> |
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#include <media/demux.h> |
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#include <media/dvb_ringbuffer.h> |
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#include <media/dvb_vb2.h> |
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/** |
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* enum dmxdev_type - type of demux filter type. |
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* |
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* @DMXDEV_TYPE_NONE: no filter set. |
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* @DMXDEV_TYPE_SEC: section filter. |
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* @DMXDEV_TYPE_PES: Program Elementary Stream (PES) filter. |
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*/ |
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enum dmxdev_type { |
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DMXDEV_TYPE_NONE, |
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DMXDEV_TYPE_SEC, |
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DMXDEV_TYPE_PES, |
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}; |
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/** |
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* enum dmxdev_state - state machine for the dmxdev. |
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* |
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* @DMXDEV_STATE_FREE: indicates that the filter is freed. |
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* @DMXDEV_STATE_ALLOCATED: indicates that the filter was allocated |
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* to be used. |
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* @DMXDEV_STATE_SET: indicates that the filter parameters are set. |
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* @DMXDEV_STATE_GO: indicates that the filter is running. |
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* @DMXDEV_STATE_DONE: indicates that a packet was already filtered |
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* and the filter is now disabled. |
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* Set only if %DMX_ONESHOT. See |
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* &dmx_sct_filter_params. |
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* @DMXDEV_STATE_TIMEDOUT: Indicates a timeout condition. |
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*/ |
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enum dmxdev_state { |
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DMXDEV_STATE_FREE, |
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DMXDEV_STATE_ALLOCATED, |
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DMXDEV_STATE_SET, |
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DMXDEV_STATE_GO, |
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DMXDEV_STATE_DONE, |
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DMXDEV_STATE_TIMEDOUT |
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}; |
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/** |
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* struct dmxdev_feed - digital TV dmxdev feed |
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* |
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* @pid: Program ID to be filtered |
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* @ts: pointer to &struct dmx_ts_feed |
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* @next: &struct list_head pointing to the next feed. |
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*/ |
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struct dmxdev_feed { |
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u16 pid; |
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struct dmx_ts_feed *ts; |
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struct list_head next; |
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}; |
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/** |
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* struct dmxdev_filter - digital TV dmxdev filter |
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* |
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* @filter: a union describing a dmxdev filter. |
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* Currently used only for section filters. |
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* @filter.sec: a &struct dmx_section_filter pointer. |
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* For section filter only. |
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* @feed: a union describing a dmxdev feed. |
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* Depending on the filter type, it can be either |
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* @feed.ts or @feed.sec. |
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* @feed.ts: a &struct list_head list. |
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* For TS and PES feeds. |
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* @feed.sec: a &struct dmx_section_feed pointer. |
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* For section feed only. |
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* @params: a union describing dmxdev filter parameters. |
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* Depending on the filter type, it can be either |
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* @params.sec or @params.pes. |
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* @params.sec: a &struct dmx_sct_filter_params embedded struct. |
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* For section filter only. |
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* @params.pes: a &struct dmx_pes_filter_params embedded struct. |
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* For PES filter only. |
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* @type: type of the dmxdev filter, as defined by &enum dmxdev_type. |
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* @state: state of the dmxdev filter, as defined by &enum dmxdev_state. |
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* @dev: pointer to &struct dmxdev. |
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* @buffer: an embedded &struct dvb_ringbuffer buffer. |
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* @vb2_ctx: control struct for VB2 handler |
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* @mutex: protects the access to &struct dmxdev_filter. |
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* @timer: &struct timer_list embedded timer, used to check for |
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* feed timeouts. |
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* Only for section filter. |
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* @todo: index for the @secheader. |
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* Only for section filter. |
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* @secheader: buffer cache to parse the section header. |
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* Only for section filter. |
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*/ |
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struct dmxdev_filter { |
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union { |
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struct dmx_section_filter *sec; |
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} filter; |
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union { |
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/* list of TS and PES feeds (struct dmxdev_feed) */ |
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struct list_head ts; |
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struct dmx_section_feed *sec; |
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} feed; |
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union { |
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struct dmx_sct_filter_params sec; |
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struct dmx_pes_filter_params pes; |
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} params; |
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enum dmxdev_type type; |
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enum dmxdev_state state; |
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struct dmxdev *dev; |
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struct dvb_ringbuffer buffer; |
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struct dvb_vb2_ctx vb2_ctx; |
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struct mutex mutex; |
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/* only for sections */ |
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struct timer_list timer; |
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int todo; |
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u8 secheader[3]; |
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}; |
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/** |
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* struct dmxdev - Describes a digital TV demux device. |
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* |
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* @dvbdev: pointer to &struct dvb_device associated with |
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* the demux device node. |
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* @dvr_dvbdev: pointer to &struct dvb_device associated with |
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* the dvr device node. |
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* @filter: pointer to &struct dmxdev_filter. |
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* @demux: pointer to &struct dmx_demux. |
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* @filternum: number of filters. |
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* @capabilities: demux capabilities as defined by &enum dmx_demux_caps. |
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* @may_do_mmap: flag used to indicate if the device may do mmap. |
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* @exit: flag to indicate that the demux is being released. |
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* @dvr_orig_fe: pointer to &struct dmx_frontend. |
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* @dvr_buffer: embedded &struct dvb_ringbuffer for DVB output. |
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* @dvr_vb2_ctx: control struct for VB2 handler |
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* @mutex: protects the usage of this structure. |
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* @lock: protects access to &dmxdev->filter->data. |
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*/ |
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struct dmxdev { |
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struct dvb_device *dvbdev; |
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struct dvb_device *dvr_dvbdev; |
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struct dmxdev_filter *filter; |
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struct dmx_demux *demux; |
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int filternum; |
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int capabilities; |
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unsigned int may_do_mmap:1; |
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unsigned int exit:1; |
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#define DMXDEV_CAP_DUPLEX 1 |
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struct dmx_frontend *dvr_orig_fe; |
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struct dvb_ringbuffer dvr_buffer; |
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#define DVR_BUFFER_SIZE (10*188*1024) |
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struct dvb_vb2_ctx dvr_vb2_ctx; |
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struct mutex mutex; |
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spinlock_t lock; |
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}; |
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/** |
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* dvb_dmxdev_init - initializes a digital TV demux and registers both demux |
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* and DVR devices. |
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* |
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* @dmxdev: pointer to &struct dmxdev. |
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* @adap: pointer to &struct dvb_adapter. |
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*/ |
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int dvb_dmxdev_init(struct dmxdev *dmxdev, struct dvb_adapter *adap); |
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/** |
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* dvb_dmxdev_release - releases a digital TV demux and unregisters it. |
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* |
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* @dmxdev: pointer to &struct dmxdev. |
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*/ |
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void dvb_dmxdev_release(struct dmxdev *dmxdev); |
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#endif /* _DMXDEV_H_ */
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