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author | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2016-07-08 11:40:06 -0300 |
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committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2016-07-08 11:59:40 -0300 |
commit | 60c2820d0f6d3497975b6488e2599f8f611d8b95 (patch) | |
tree | b3b03707c6438ea9b99cc57e847ebf517f968ab1 /Documentation/media/uapi/dvb/dmx-fwrite.rst | |
parent | a97369b5e21ea9b8b5fef7c0f4f48bbe60c07ca3 (diff) |
doc_rst: rename the media Sphinx suff to Documentation/media
The name of the subsystem is "media", and not "linux_tv". Also,
as we plan to add other stuff there in the future, let's
rename also the media uAPI book to media_uapi, to make it
clearer.
No functional changes.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'Documentation/media/uapi/dvb/dmx-fwrite.rst')
-rw-r--r-- | Documentation/media/uapi/dvb/dmx-fwrite.rst | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/Documentation/media/uapi/dvb/dmx-fwrite.rst b/Documentation/media/uapi/dvb/dmx-fwrite.rst new file mode 100644 index 000000000000..9efd81a1b5c8 --- /dev/null +++ b/Documentation/media/uapi/dvb/dmx-fwrite.rst @@ -0,0 +1,89 @@ +.. -*- coding: utf-8; mode: rst -*- + +.. _dmx_fwrite: + +================= +DVB demux write() +================= + +Name +---- + +DVB demux write() + + +Synopsis +-------- + +.. cpp:function:: ssize_t write(int fd, const void *buf, size_t count) + + +Arguments +--------- + +.. flat-table:: + :header-rows: 0 + :stub-columns: 0 + + + - .. row 1 + + - int fd + + - File descriptor returned by a previous call to open(). + + - .. row 2 + + - void \*buf + + - Pointer to the buffer containing the Transport Stream. + + - .. row 3 + + - size_t count + + - Size of buf. + + +Description +----------- + +This system call is only provided by the logical device +/dev/dvb/adapter0/dvr0, 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/adapter0/demux0. +The amount of data to be transferred is implied by count. + + +Return Value +------------ + +.. flat-table:: + :header-rows: 0 + :stub-columns: 0 + + + - .. row 1 + + - ``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). + + - .. row 2 + + - ``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. + + - .. row 3 + + - ``EBADF`` + + - fd is not a valid open file descriptor. |