Files
file	dvb-dev.h
	Provides interfaces to handle Digital TV devices.

Data Structures
struct	dvb_dev_list
	Digital TV device node properties. More...

struct	dvb_device
	Digital TV list of devices. More...

Functions
struct dvb_device *	dvb_dev_alloc (void)
	Allocate a struct dvb_device.

void	dvb_dev_free (struct dvb_device *dvb)
	free a struct dvb_device

int	dvb_dev_find (struct dvb_device dvb, dvb_dev_change_t handler, void user_priv)
	finds all DVB devices on the local machine

void	dvb_dev_stop_monitor (struct dvb_device *dvb)
	Stop the dvb_dev_find loop.

void	dvb_dev_set_logpriv (struct dvb_device dvb, unsigned verbose, dvb_logfunc_priv logfunc, void logpriv)
	Sets the DVB verbosity and log function with context private data.

void	dvb_dev_set_log (struct dvb_device *dvb, unsigned verbose, dvb_logfunc logfunc)
	Sets the DVB verbosity and log function.

struct dvb_open_descriptor *	dvb_dev_open (struct dvb_device dvb, const char sysname, int flags)
	Opens a dvb device.

void	dvb_dev_close (struct dvb_open_descriptor *open_dev)
	Closes a dvb device.

int	dvb_dev_get_fd (struct dvb_open_descriptor *open_dev)
	returns fd from a local device This will not work for remote devices.

ssize_t	dvb_dev_read (struct dvb_open_descriptor open_dev, void buf, size_t count)
	read from a dvb demux or dvr file

void	dvb_dev_dmx_stop (struct dvb_open_descriptor *open_dev)
	Stops the demux filter for a given file descriptor.

int	dvb_dev_set_bufsize (struct dvb_open_descriptor *open_dev, int buffersize)
	Start a demux or dvr buffer size.

int	dvb_dev_dmx_set_pesfilter (struct dvb_open_descriptor *open_dev, int pid, dmx_pes_type_t type, dmx_output_t output, int buffersize)
	Start a filter for a MPEG-TS Packetized Elementary Stream (PES)

int	dvb_dev_dmx_set_section_filter (struct dvb_open_descriptor open_dev, int pid, unsigned filtsize, unsigned char filter, unsigned char mask, unsigned char mode, unsigned int flags)
	Sets a MPEG-TS section filter.

int	dvb_dev_dmx_get_pmt_pid (struct dvb_open_descriptor *open_dev, int sid)
	read the contents of the MPEG-TS PAT table, seeking for an specific service ID

Detailed Description

Function Documentation

◆ dvb_dev_alloc()

struct dvb_device * dvb_dev_alloc ( void )

Allocate a struct dvb_device.

Note: Before using the dvb device function calls, the struct dvb_device should be allocated via this function call.

Returns: on success, returns a pointer to the allocated struct dvb_device or NULL if not enough memory to allocate the struct.

Examples: dvb-fe-tool.c, dvbv5-scan.c, and dvbv5-zap.c.

◆ dvb_dev_close()

void dvb_dev_close ( struct dvb_open_descriptor * open_dev )

Closes a dvb device.

Parameters

open_dev Points to the struct dvb_open_descriptor to be closed.

Examples: dvbv5-scan.c, and dvbv5-zap.c.

◆ dvb_dev_dmx_get_pmt_pid()

int dvb_dev_dmx_get_pmt_pid	(	struct dvb_open_descriptor *	open_dev,
		int	sid
	)

read the contents of the MPEG-TS PAT table, seeking for an specific service ID

Parameters

open_dev	Points to the struct dvb_open_descriptor
sid	Session ID to seeking

Returns: At return, it returns a negative value if error or the PID associated with the desired Session ID.

Warning: This function currently assumes that the PAT fits into one session.

Note: valid only for DVB_DEVICE_DEMUX.

Examples: dvbv5-zap.c.

◆ dvb_dev_dmx_set_pesfilter()

int dvb_dev_dmx_set_pesfilter	(	struct dvb_open_descriptor *	open_dev,
		int	pid,
		dmx_pes_type_t	type,
		dmx_output_t	output,
		int	buffersize
	)

Start a filter for a MPEG-TS Packetized Elementary Stream (PES)

Parameters

open_dev	Points to the struct dvb_open_descriptor
pid	Program ID to filter. Use 0x2000 to select all PIDs
type	type of the PID (DMX_PES_VIDEO, DMX_PES_AUDIO, DMX_PES_OTHER, etc).
output	Where the data will be output (DMX_OUT_TS_TAP, DMX_OUT_DECODER, etc).
buffersize	Size of the buffer to be allocated to store the filtered data.

This is a wrapper function for DMX_SET_PES_FILTER and DMX_SET_BUFFER_SIZE ioctls.

See http://linuxtv.org/downloads/v4l-dvb-apis/dvb_demux.html for more details.

Returns: Retuns zero on success, -1 otherwise.

Note: valid only for DVB_DEVICE_DEMUX.

Examples: dvbv5-zap.c.

◆ dvb_dev_dmx_set_section_filter()

int dvb_dev_dmx_set_section_filter	(	struct dvb_open_descriptor *	open_dev,
		int	pid,
		unsigned	filtsize,
		unsigned char *	filter,
		unsigned char *	mask,
		unsigned char *	mode,
		unsigned int	flags
	)

Sets a MPEG-TS section filter.

Parameters

open_dev	Points to the struct dvb_open_descriptor
pid	Program ID to filter. Use 0x2000 to select all PIDs
filtsize	Size of the filter (up to 18 btyes)
filter	data to filter. Can be NULL or should have filtsize length
mask	filter mask. Can be NULL or should have filtsize length
mode	mode mask. Can be NULL or should have filtsize length
flags	flags for set filter (DMX_CHECK_CRC,DMX_ONESHOT, DMX_IMMEDIATE_START).

This is a wrapper function for DMX_SET_FILTER ioctl.

See http://linuxtv.org/downloads/v4l-dvb-apis/dvb_demux.html for more details.

Returns: Retuns zero on success, -1 otherwise.

Note: valid only for DVB_DEVICE_DEMUX.

◆ dvb_dev_dmx_stop()

void dvb_dev_dmx_stop ( struct dvb_open_descriptor * open_dev )

Stops the demux filter for a given file descriptor.

Parameters

open_dev Points to the struct dvb_open_descriptor

This is a wrapper function for DMX_STOP ioctl.

See http://linuxtv.org/downloads/v4l-dvb-apis/dvb_demux.html for more details.

Note: valid only for DVB_DEVICE_DEMUX.

◆ dvb_dev_find()

int dvb_dev_find	(	struct dvb_device *	dvb,
		dvb_dev_change_t	handler,
		void *	user_priv
	)

finds all DVB devices on the local machine

Parameters

dvb	pointer to struct dvb_device to be filled
handler	if not NULL, then this is called whenever something changed monitor mode
user_priv	pointer to user private data

This routine can be called on two modes: normal or monitor mode

In normal mode, it will seek for the local Digital TV devices, store them at the struct dvb_device and return.

In monitor mode, it will not only enumerate all devices, but it will also keep waiting for device changes. The handler callback is called for the changed device.

Returns: returns 0 on success, a negative value otherwise.

Examples: dvb-fe-tool.c, dvbv5-scan.c, and dvbv5-zap.c.

◆ dvb_dev_free()

void dvb_dev_free ( struct dvb_device * dvb )

free a struct dvb_device

Parameters

dvb	pointer to struct dvb_device to be freed

Examples: dvb-fe-tool.c, dvbv5-scan.c, and dvbv5-zap.c.

◆ dvb_dev_get_fd()

int dvb_dev_get_fd ( struct dvb_open_descriptor * open_dev )

returns fd from a local device This will not work for remote devices.

Parameters

open_dev Points to the struct dvb_open_descriptor

Returns: On success, returns the fd. Returns -1 on error.

◆ dvb_dev_open()

struct dvb_open_descriptor * dvb_dev_open	(	struct dvb_device *	dvb,
		const char *	sysname,
		int	flags
	)

Opens a dvb device.

Parameters

dvb	pointer to struct dvb_device to be used
sysname	Kernel's name of the device to be opened, as obtained via dvb_dev_seek_by_adapter() or via dvb_dev_find().
flags	Flags to be passed to open: O_RDONLY, O_RDWR and/or O_NONBLOCK

Note: Please notice that O_NONBLOCK is not supported for frontend devices, and will be silently ignored.; the sysname will only work if a previous call to dvb_dev_find() is issued.

This function is equivalent to open(2) system call: it opens a Digital TV given by the dev parameter, using the flags.

Returns: returns a pointer to the dvb_open_descriptor that should be used on further calls if sucess. NULL otherwise.

Examples: dvb-fe-tool.c, dvbv5-scan.c, and dvbv5-zap.c.

◆ dvb_dev_read()

ssize_t dvb_dev_read	(	struct dvb_open_descriptor *	open_dev,
		void *	buf,
		size_t	count
	)

read from a dvb demux or dvr file

Parameters

open_dev	Points to the struct dvb_open_descriptor to be closed.
buf	Buffer to store the data
count	number of bytes to read

Returns: On success, returns the number of bytes read. Returns -1 on error.

Examples: dvbv5-zap.c.

◆ dvb_dev_set_bufsize()

int dvb_dev_set_bufsize	(	struct dvb_open_descriptor *	open_dev,
		int	buffersize
	)

Start a demux or dvr buffer size.

Parameters

open_dev	Points to the struct dvb_open_descriptor
buffersize	Size of the buffer to be allocated to store the filtered data.

This is a wrapper function for DMX_SET_BUFFER_SIZE ioctl.

See http://linuxtv.org/downloads/v4l-dvb-apis/dvb_demux.html for more details.

Returns: Retuns zero on success, -1 otherwise.

Note: valid only for DVB_DEVICE_DEMUX or DVB_DEVICE_DVR.

Examples: dvbv5-zap.c.

◆ dvb_dev_set_log()

void dvb_dev_set_log	(	struct dvb_device *	dvb,
		unsigned	verbose,
		dvb_logfunc	logfunc
	)

Sets the DVB verbosity and log function.

Parameters

dvb	pointer to struct dvb_device to be used
verbose	Verbosity level of the messages that will be printed
logfunc	Callback function to be called when a log event happens. Can either store the event into a file or to print it at the TUI/GUI. Can be null.

Sets the function to report log errors and to set the verbosity level of debug report messages. If not called, or if logfunc is NULL, the libdvbv5 will report error and debug messages via stderr, and will use colors for the debug messages.

Examples: dvb-fe-tool.c, dvbv5-scan.c, and dvbv5-zap.c.

◆ dvb_dev_set_logpriv()

void dvb_dev_set_logpriv	(	struct dvb_device *	dvb,
		unsigned	verbose,
		dvb_logfunc_priv	logfunc,
		void *	logpriv
	)

Sets the DVB verbosity and log function with context private data.

Parameters

dvb	pointer to struct dvb_device to be used
verbose	Verbosity level of the messages that will be printed
logfunc	Callback function to be called when a log event happens. Can either store the event into a file or to print it at the TUI/GUI. Can be null.
logpriv	Private data for log function

Sets the function to report log errors and to set the verbosity level of debug report messages. If not called, or if logfunc is NULL, the libdvbv5 will report error and debug messages via stderr, and will use colors for the debug messages.

◆ dvb_dev_stop_monitor()

void dvb_dev_stop_monitor ( struct dvb_device * dvb )

Stop the dvb_dev_find loop.

Parameters

dvb	pointer to struct dvb_device to be used

This function stops dvb_dev_find() if it is running in monitor mode. It does nothing on other modes. Can be called even if the monitor mode was already stopped.

Files

Data Structures

Functions

Detailed Description

Function Documentation

◆ dvb_dev_alloc()

◆ dvb_dev_close()

◆ dvb_dev_dmx_get_pmt_pid()

◆ dvb_dev_dmx_set_pesfilter()

◆ dvb_dev_dmx_set_section_filter()

◆ dvb_dev_dmx_stop()

◆ dvb_dev_find()

◆ dvb_dev_free()

◆ dvb_dev_get_fd()

◆ dvb_dev_open()

◆ dvb_dev_read()

◆ dvb_dev_set_bufsize()

◆ dvb_dev_set_log()

◆ dvb_dev_set_logpriv()

◆ dvb_dev_stop_monitor()