forked from Minki/linux
699f19e3f1
The usage of the term "DVB" at the dvb API docs is confusing, as, right now, it can refer to either the European digital TV standard or to the subsystem. So, prefer calling it as "Digital TV" on most places, to avoid ambiguity. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
85 lines
1.3 KiB
ReStructuredText
85 lines
1.3 KiB
ReStructuredText
.. -*- coding: utf-8; mode: rst -*-
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.. _audio_fwrite:
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=========================
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Digital TV audio write()
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=========================
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Name
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----
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Digital TV audio write()
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.. attention:: This ioctl is deprecated
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Synopsis
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--------
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.. c:function:: size_t write(int fd, const void *buf, size_t count)
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:name: dvb-audio-write
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Arguments
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---------
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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- .. row 1
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- int fd
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- File descriptor returned by a previous call to open().
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- .. row 2
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- void \*buf
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- Pointer to the buffer containing the PES data.
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- .. row 3
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- size_t count
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- Size of buf.
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Description
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-----------
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This system call can only be used if AUDIO_SOURCE_MEMORY is selected
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in the ioctl call AUDIO_SELECT_SOURCE. The data provided shall be in
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PES format. If O_NONBLOCK is not specified the function will block
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until buffer space is available. The amount of data to be transferred is
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implied by count.
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Return Value
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------------
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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- .. row 1
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- ``EPERM``
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- Mode AUDIO_SOURCE_MEMORY not selected.
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- .. row 2
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- ``ENOMEM``
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- Attempted to write more data than the internal buffer can hold.
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- .. row 3
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- ``EBADF``
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- fd is not a valid open file descriptor.
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