mirror of https://gitee.com/openkylin/linux.git
91 lines
1.7 KiB
ReStructuredText
91 lines
1.7 KiB
ReStructuredText
.. Permission is granted to copy, distribute and/or modify this
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.. document under the terms of the GNU Free Documentation License,
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.. Version 1.1 or any later version published by the Free Software
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.. Foundation, with no Invariant Sections, no Front-Cover Texts
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.. and no Back-Cover Texts. A copy of the license is included at
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.. Documentation/media/uapi/fdl-appendix.rst.
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..
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.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
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.. _video_fwrite:
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=================
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dvb video write()
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=================
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Name
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----
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dvb video 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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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 VIDEO_SOURCE_MEMORY is selected
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in the ioctl call VIDEO_SELECT_SOURCE. The data provided shall be in
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PES format, unless the capability allows other formats. If O_NONBLOCK
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is not specified the function will block until buffer space is
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available. The amount of data to be transferred is 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 VIDEO_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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