Digital TV demux

## Files

file | dvb-demux.h
| Provides interfaces to deal with DVB demux.

## Functions

int | dvb_dmx_open (int adapter, int demux)
| Opens a DVB demux in read/write mode.
void | dvb_dmx_close (int dmx_fd)
| Stops the DMX filter for the file descriptor and closes.
void | dvb_dmx_stop (int dmx_fd)
| Stops the DMX filter for a given file descriptor.
int | dvb_set_pesfilter (int dmxfd, 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_set_section_filter (int dmxfd, int pid, unsigned filtsize, unsigned char *filter, unsigned char *mask, unsigned char *mode, unsigned int flags)
| Sets a MPEG-TS section filter.
int | dvb_get_pmt_pid (int dmxfd, int sid)
| read the contents of the MPEG-TS PAT table, seeking for an specific service ID

## Detailed Description

## Function Documentation

## dvb_dmx_close()

void dvb_dmx_close | ( | int | dmx_fd | ) |

Stops the DMX filter for the file descriptor and closes.

Parameters

  dmx_fd | File descriptor to close

This is a wrapper function to close().

Warning
  Deprecated. Please use dvb_dev_close() instead.

## dvb_dmx_open()

int dvb_dmx_open | ( | int | adapter,
|  | int | demux )

Opens a DVB demux in read/write mode.

Parameters

  adapter | DVB adapter number to open
  demux | DVB demux number to open

This is a wrapper function to open(). File is always opened in blocking mode.

Returns
  Returns a file descriptor on success, -1 otherwise.

Warning
  Deprecated. Please use dvb_dev_open() instead.

## dvb_dmx_stop()

void dvb_dmx_stop | ( | int | dmx_fd | ) |

Stops the DMX filter for a given file descriptor.

Parameters

  dmx_fd | File descriptor to close

This is a wrapper function to DMX_STOP ioctl. See http://linuxtv.org/downloads/v4l-dvb-apis/dvb_demux.html for more details.

Warning
  Deprecated. Please use dvb_dev_dmx_stop() instead.

## dvb_get_pmt_pid()

int dvb_get_pmt_pid | ( | int | dmxfd,
|  | int | sid )

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

Parameters

  dmxfd | File descriptor for the demux device
  sid | Session ID to seeking

Warning
  Deprecated. Please use dvb_get_pmt_pid() instead.

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.

## dvb_set_pesfilter()

int dvb_set_pesfilter | ( | int | dmxfd,
|  | 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

  dmxfd | File descriptor for the demux device
  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 ioctl. See http://linuxtv.org/downloads/v4l-dvb-apis/dvb_demux.html for more details.

Returns
  Retuns zero on success, -1 otherwise.

Warning
  Deprecated. Please use dvb_dev_dmx_set_pesfilter() instead.

## dvb_set_section_filter()

int dvb_set_section_filter | ( | int | dmxfd,
|  | int | pid,
|  | unsigned | filtsize,
|  | unsigned char * | filter,
|  | unsigned char * | mask,
|  | unsigned char * | mode,
|  | unsigned int | flags )

Sets a MPEG-TS section filter.

Parameters

  dmxfd | File descriptor for the demux device
  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.

Warning
  Deprecated. Please use dvb_dev_dmx_set_pesfilter() instead.

Returns
  Retuns zero on success, -1 otherwise.