| /* |
| * 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/kernel.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. |
| * @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. |
| * @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. |
| * @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 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_ */ |