| .. -*- coding: utf-8; mode: rst -*- |
| |
| .. _dmx_fopen: |
| |
| ================ |
| DVB demux open() |
| ================ |
| |
| Name |
| ---- |
| |
| DVB demux open() |
| |
| |
| Synopsis |
| -------- |
| |
| .. c:function:: int open(const char *deviceName, int flags) |
| :name: dvb-dmx-open |
| |
| Arguments |
| --------- |
| |
| ``name`` |
| Name of specific DVB demux device. |
| |
| ``flags`` |
| A bit-wise OR of the following flags: |
| |
| .. flat-table:: |
| :header-rows: 0 |
| :stub-columns: 0 |
| |
| - |
| - O_RDONLY |
| - read-only access |
| |
| - |
| - O_RDWR |
| - read/write access |
| |
| - |
| - O_NONBLOCK |
| - open in non-blocking mode |
| (blocking mode is the default) |
| |
| |
| Description |
| ----------- |
| |
| This system call, used with a device name of /dev/dvb/adapter0/demux0, |
| allocates a new filter and returns a handle which can be used for |
| subsequent control of that filter. This call has to be made for each |
| filter to be used, i.e. every returned file descriptor is a reference to |
| a single filter. /dev/dvb/adapter0/dvr0 is a logical device to be used |
| for retrieving Transport Streams for digital video recording. When |
| reading from this device a transport stream containing the packets from |
| all PES filters set in the corresponding demux device |
| (/dev/dvb/adapter0/demux0) having the output set to DMX_OUT_TS_TAP. A |
| recorded Transport Stream is replayed by writing to this device. |
| |
| The significance of blocking or non-blocking mode is described in the |
| documentation for functions where there is a difference. It does not |
| affect the semantics of the open() call itself. A device opened in |
| blocking mode can later be put into non-blocking mode (and vice versa) |
| using the F_SETFL command of the fcntl system call. |
| |
| |
| Return Value |
| ------------ |
| |
| .. flat-table:: |
| :header-rows: 0 |
| :stub-columns: 0 |
| |
| |
| - .. row 1 |
| |
| - ``ENODEV`` |
| |
| - Device driver not loaded/available. |
| |
| - .. row 2 |
| |
| - ``EINVAL`` |
| |
| - Invalid argument. |
| |
| - .. row 3 |
| |
| - ``EMFILE`` |
| |
| - “Too many open files”, i.e. no more filters available. |
| |
| - .. row 4 |
| |
| - ``ENOMEM`` |
| |
| - The driver failed to allocate enough memory. |
