3.2.4. Digital TV demux write()¶
3.2.4.1. Name¶
Digital TV demux write()
3.2.4.3. Arguments¶
fd- File descriptor returned by a previous call to
open(). buf- Buffer with data to be written
count- Number of bytes at the buffer
3.2.4.4. Description¶
This system call is only provided by the logical device
/dev/dvb/adapter?/dvr?, associated with the physical demux device that
provides the actual DVR functionality. It is used for replay of a
digitally recorded Transport Stream. Matching filters have to be defined
in the corresponding physical demux device, /dev/dvb/adapter?/demux?.
The amount of data to be transferred is implied by count.
3.2.4.5. Return Value¶
On success 0 is returned.
On error -1 is returned, and the errno variable is set
appropriately.
EWOULDBLOCK |
No data was written. This might happen if O_NONBLOCK was
specified and there is no more buffer space available (if
O_NONBLOCK is not specified the function will block until buffer
space is available). |
EBUSY |
This error code indicates that there are conflicting requests. The
corresponding demux device is setup to receive data from the
front- end. Make sure that these filters are stopped and that the
filters with input set to DMX_IN_DVR are started. |
The generic error codes are described at the Generic Error Codes chapter.