mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 16:29:59 +00:00
![Mauro Carvalho Chehab](/assets/img/avatar_default.png)
Now that we have support for a buffer counter and for error flags, update them at DMX_DQBUF. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
354 lines
11 KiB
C
354 lines
11 KiB
C
/*
|
|
* dvb_demux.h: DVB kernel demux API
|
|
*
|
|
* Copyright (C) 2000-2001 Marcus Metzler & Ralph 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 _DVB_DEMUX_H_
|
|
#define _DVB_DEMUX_H_
|
|
|
|
#include <linux/time.h>
|
|
#include <linux/timer.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/mutex.h>
|
|
|
|
#include <media/demux.h>
|
|
|
|
/**
|
|
* enum dvb_dmx_filter_type - type of demux feed.
|
|
*
|
|
* @DMX_TYPE_TS: feed is in TS mode.
|
|
* @DMX_TYPE_SEC: feed is in Section mode.
|
|
*/
|
|
enum dvb_dmx_filter_type {
|
|
DMX_TYPE_TS,
|
|
DMX_TYPE_SEC,
|
|
};
|
|
|
|
/**
|
|
* enum dvb_dmx_state - state machine for a demux filter.
|
|
*
|
|
* @DMX_STATE_FREE: indicates that the filter is freed.
|
|
* @DMX_STATE_ALLOCATED: indicates that the filter was allocated
|
|
* to be used.
|
|
* @DMX_STATE_READY: indicates that the filter is ready
|
|
* to be used.
|
|
* @DMX_STATE_GO: indicates that the filter is running.
|
|
*/
|
|
enum dvb_dmx_state {
|
|
DMX_STATE_FREE,
|
|
DMX_STATE_ALLOCATED,
|
|
DMX_STATE_READY,
|
|
DMX_STATE_GO,
|
|
};
|
|
|
|
#define DVB_DEMUX_MASK_MAX 18
|
|
|
|
#define MAX_PID 0x1fff
|
|
|
|
#define SPEED_PKTS_INTERVAL 50000
|
|
|
|
/**
|
|
* struct dvb_demux_filter - Describes a DVB demux section filter.
|
|
*
|
|
* @filter: Section filter as defined by &struct dmx_section_filter.
|
|
* @maskandmode: logical ``and`` bit mask.
|
|
* @maskandnotmode: logical ``and not`` bit mask.
|
|
* @doneq: flag that indicates when a filter is ready.
|
|
* @next: pointer to the next section filter.
|
|
* @feed: &struct dvb_demux_feed pointer.
|
|
* @index: index of the used demux filter.
|
|
* @state: state of the filter as described by &enum dvb_dmx_state.
|
|
* @type: type of the filter as described
|
|
* by &enum dvb_dmx_filter_type.
|
|
*/
|
|
|
|
struct dvb_demux_filter {
|
|
struct dmx_section_filter filter;
|
|
u8 maskandmode[DMX_MAX_FILTER_SIZE];
|
|
u8 maskandnotmode[DMX_MAX_FILTER_SIZE];
|
|
bool doneq;
|
|
|
|
struct dvb_demux_filter *next;
|
|
struct dvb_demux_feed *feed;
|
|
int index;
|
|
enum dvb_dmx_state state;
|
|
enum dvb_dmx_filter_type type;
|
|
|
|
/* private: used only by av7110 */
|
|
u16 hw_handle;
|
|
};
|
|
|
|
/**
|
|
* struct dvb_demux_feed - describes a DVB field
|
|
*
|
|
* @feed: a union describing a digital TV feed.
|
|
* Depending on the feed type, it can be either
|
|
* @feed.ts or @feed.sec.
|
|
* @feed.ts: a &struct dmx_ts_feed pointer.
|
|
* For TS feed only.
|
|
* @feed.sec: a &struct dmx_section_feed pointer.
|
|
* For section feed only.
|
|
* @cb: a union describing digital TV callbacks.
|
|
* Depending on the feed type, it can be either
|
|
* @cb.ts or @cb.sec.
|
|
* @cb.ts: a dmx_ts_cb() calback function pointer.
|
|
* For TS feed only.
|
|
* @cb.sec: a dmx_section_cb() callback function pointer.
|
|
* For section feed only.
|
|
* @demux: pointer to &struct dvb_demux.
|
|
* @priv: private data that can optionally be used by a DVB driver.
|
|
* @type: type of the filter, as defined by &enum dvb_dmx_filter_type.
|
|
* @state: state of the filter as defined by &enum dvb_dmx_state.
|
|
* @pid: PID to be filtered.
|
|
* @timeout: feed timeout.
|
|
* @filter: pointer to &struct dvb_demux_filter.
|
|
* @buffer_flags: Buffer flags used to report discontinuity users via DVB
|
|
* memory mapped API, as defined by &enum dmx_buffer_flags.
|
|
* @ts_type: type of TS, as defined by &enum ts_filter_type.
|
|
* @pes_type: type of PES, as defined by &enum dmx_ts_pes.
|
|
* @cc: MPEG-TS packet continuity counter
|
|
* @pusi_seen: if true, indicates that a discontinuity was detected.
|
|
* it is used to prevent feeding of garbage from previous section.
|
|
* @peslen: length of the PES (Packet Elementary Stream).
|
|
* @list_head: head for the list of digital TV demux feeds.
|
|
* @index: a unique index for each feed. Can be used as hardware
|
|
* pid filter index.
|
|
*/
|
|
struct dvb_demux_feed {
|
|
union {
|
|
struct dmx_ts_feed ts;
|
|
struct dmx_section_feed sec;
|
|
} feed;
|
|
|
|
union {
|
|
dmx_ts_cb ts;
|
|
dmx_section_cb sec;
|
|
} cb;
|
|
|
|
struct dvb_demux *demux;
|
|
void *priv;
|
|
enum dvb_dmx_filter_type type;
|
|
enum dvb_dmx_state state;
|
|
u16 pid;
|
|
|
|
ktime_t timeout;
|
|
struct dvb_demux_filter *filter;
|
|
|
|
u32 buffer_flags;
|
|
|
|
enum ts_filter_type ts_type;
|
|
enum dmx_ts_pes pes_type;
|
|
|
|
int cc;
|
|
bool pusi_seen;
|
|
|
|
u16 peslen;
|
|
|
|
struct list_head list_head;
|
|
unsigned int index;
|
|
};
|
|
|
|
/**
|
|
* struct dvb_demux - represents a digital TV demux
|
|
* @dmx: embedded &struct dmx_demux with demux capabilities
|
|
* and callbacks.
|
|
* @priv: private data that can optionally be used by
|
|
* a DVB driver.
|
|
* @filternum: maximum amount of DVB filters.
|
|
* @feednum: maximum amount of DVB feeds.
|
|
* @start_feed: callback routine to be called in order to start
|
|
* a DVB feed.
|
|
* @stop_feed: callback routine to be called in order to stop
|
|
* a DVB feed.
|
|
* @write_to_decoder: callback routine to be called if the feed is TS and
|
|
* it is routed to an A/V decoder, when a new TS packet
|
|
* is received.
|
|
* Used only on av7110-av.c.
|
|
* @check_crc32: callback routine to check CRC. If not initialized,
|
|
* dvb_demux will use an internal one.
|
|
* @memcopy: callback routine to memcopy received data.
|
|
* If not initialized, dvb_demux will default to memcpy().
|
|
* @users: counter for the number of demux opened file descriptors.
|
|
* Currently, it is limited to 10 users.
|
|
* @filter: pointer to &struct dvb_demux_filter.
|
|
* @feed: pointer to &struct dvb_demux_feed.
|
|
* @frontend_list: &struct list_head with frontends used by the demux.
|
|
* @pesfilter: array of &struct dvb_demux_feed with the PES types
|
|
* that will be filtered.
|
|
* @pids: list of filtered program IDs.
|
|
* @feed_list: &struct list_head with feeds.
|
|
* @tsbuf: temporary buffer used internally to store TS packets.
|
|
* @tsbufp: temporary buffer index used internally.
|
|
* @mutex: pointer to &struct mutex used to protect feed set
|
|
* logic.
|
|
* @lock: pointer to &spinlock_t, used to protect buffer handling.
|
|
* @cnt_storage: buffer used for TS/TEI continuity check.
|
|
* @speed_last_time: &ktime_t used for TS speed check.
|
|
* @speed_pkts_cnt: packets count used for TS speed check.
|
|
*/
|
|
struct dvb_demux {
|
|
struct dmx_demux dmx;
|
|
void *priv;
|
|
int filternum;
|
|
int feednum;
|
|
int (*start_feed)(struct dvb_demux_feed *feed);
|
|
int (*stop_feed)(struct dvb_demux_feed *feed);
|
|
int (*write_to_decoder)(struct dvb_demux_feed *feed,
|
|
const u8 *buf, size_t len);
|
|
u32 (*check_crc32)(struct dvb_demux_feed *feed,
|
|
const u8 *buf, size_t len);
|
|
void (*memcopy)(struct dvb_demux_feed *feed, u8 *dst,
|
|
const u8 *src, size_t len);
|
|
|
|
int users;
|
|
#define MAX_DVB_DEMUX_USERS 10
|
|
struct dvb_demux_filter *filter;
|
|
struct dvb_demux_feed *feed;
|
|
|
|
struct list_head frontend_list;
|
|
|
|
struct dvb_demux_feed *pesfilter[DMX_PES_OTHER];
|
|
u16 pids[DMX_PES_OTHER];
|
|
|
|
#define DMX_MAX_PID 0x2000
|
|
struct list_head feed_list;
|
|
u8 tsbuf[204];
|
|
int tsbufp;
|
|
|
|
struct mutex mutex;
|
|
spinlock_t lock;
|
|
|
|
uint8_t *cnt_storage; /* for TS continuity check */
|
|
|
|
ktime_t speed_last_time; /* for TS speed check */
|
|
uint32_t speed_pkts_cnt; /* for TS speed check */
|
|
|
|
/* private: used only on av7110 */
|
|
int playing;
|
|
int recording;
|
|
};
|
|
|
|
/**
|
|
* dvb_dmx_init - initialize a digital TV demux struct.
|
|
*
|
|
* @demux: &struct dvb_demux to be initialized.
|
|
*
|
|
* Before being able to register a digital TV demux struct, drivers
|
|
* should call this routine. On its typical usage, some fields should
|
|
* be initialized at the driver before calling it.
|
|
*
|
|
* A typical usecase is::
|
|
*
|
|
* dvb->demux.dmx.capabilities =
|
|
* DMX_TS_FILTERING | DMX_SECTION_FILTERING |
|
|
* DMX_MEMORY_BASED_FILTERING;
|
|
* dvb->demux.priv = dvb;
|
|
* dvb->demux.filternum = 256;
|
|
* dvb->demux.feednum = 256;
|
|
* dvb->demux.start_feed = driver_start_feed;
|
|
* dvb->demux.stop_feed = driver_stop_feed;
|
|
* ret = dvb_dmx_init(&dvb->demux);
|
|
* if (ret < 0)
|
|
* return ret;
|
|
*/
|
|
int dvb_dmx_init(struct dvb_demux *demux);
|
|
|
|
/**
|
|
* dvb_dmx_release - releases a digital TV demux internal buffers.
|
|
*
|
|
* @demux: &struct dvb_demux to be released.
|
|
*
|
|
* The DVB core internally allocates data at @demux. This routine
|
|
* releases those data. Please notice that the struct itelf is not
|
|
* released, as it can be embedded on other structs.
|
|
*/
|
|
void dvb_dmx_release(struct dvb_demux *demux);
|
|
|
|
/**
|
|
* dvb_dmx_swfilter_packets - use dvb software filter for a buffer with
|
|
* multiple MPEG-TS packets with 188 bytes each.
|
|
*
|
|
* @demux: pointer to &struct dvb_demux
|
|
* @buf: buffer with data to be filtered
|
|
* @count: number of MPEG-TS packets with size of 188.
|
|
*
|
|
* The routine will discard a DVB packet that don't start with 0x47.
|
|
*
|
|
* Use this routine if the DVB demux fills MPEG-TS buffers that are
|
|
* already aligned.
|
|
*
|
|
* NOTE: The @buf size should have size equal to ``count * 188``.
|
|
*/
|
|
void dvb_dmx_swfilter_packets(struct dvb_demux *demux, const u8 *buf,
|
|
size_t count);
|
|
|
|
/**
|
|
* dvb_dmx_swfilter - use dvb software filter for a buffer with
|
|
* multiple MPEG-TS packets with 188 bytes each.
|
|
*
|
|
* @demux: pointer to &struct dvb_demux
|
|
* @buf: buffer with data to be filtered
|
|
* @count: number of MPEG-TS packets with size of 188.
|
|
*
|
|
* If a DVB packet doesn't start with 0x47, it will seek for the first
|
|
* byte that starts with 0x47.
|
|
*
|
|
* Use this routine if the DVB demux fill buffers that may not start with
|
|
* a packet start mark (0x47).
|
|
*
|
|
* NOTE: The @buf size should have size equal to ``count * 188``.
|
|
*/
|
|
void dvb_dmx_swfilter(struct dvb_demux *demux, const u8 *buf, size_t count);
|
|
|
|
/**
|
|
* dvb_dmx_swfilter_204 - use dvb software filter for a buffer with
|
|
* multiple MPEG-TS packets with 204 bytes each.
|
|
*
|
|
* @demux: pointer to &struct dvb_demux
|
|
* @buf: buffer with data to be filtered
|
|
* @count: number of MPEG-TS packets with size of 204.
|
|
*
|
|
* If a DVB packet doesn't start with 0x47, it will seek for the first
|
|
* byte that starts with 0x47.
|
|
*
|
|
* Use this routine if the DVB demux fill buffers that may not start with
|
|
* a packet start mark (0x47).
|
|
*
|
|
* NOTE: The @buf size should have size equal to ``count * 204``.
|
|
*/
|
|
void dvb_dmx_swfilter_204(struct dvb_demux *demux, const u8 *buf,
|
|
size_t count);
|
|
|
|
/**
|
|
* dvb_dmx_swfilter_raw - make the raw data available to userspace without
|
|
* filtering
|
|
*
|
|
* @demux: pointer to &struct dvb_demux
|
|
* @buf: buffer with data
|
|
* @count: number of packets to be passed. The actual size of each packet
|
|
* depends on the &dvb_demux->feed->cb.ts logic.
|
|
*
|
|
* Use it if the driver needs to deliver the raw payload to userspace without
|
|
* passing through the kernel demux. That is meant to support some
|
|
* delivery systems that aren't based on MPEG-TS.
|
|
*
|
|
* This function relies on &dvb_demux->feed->cb.ts to actually handle the
|
|
* buffer.
|
|
*/
|
|
void dvb_dmx_swfilter_raw(struct dvb_demux *demux, const u8 *buf,
|
|
size_t count);
|
|
|
|
#endif /* _DVB_DEMUX_H_ */
|