Documentation/linux_tv/media/dvb/video-fwrite.rst

   1 .. -*- coding: utf-8; mode: rst -*-
   2
   3 .. _video_fwrite:
   4
   5 =================
   6 dvb video write()
   7 =================
   8
   9 NAME
  10 ----
  11
  12 dvb video write()
  13
  14 SYNOPSIS
  15 --------
  16
  17 .. c:function:: size_t write(int fd, const void *buf, size_t count)
  18
  19
  20 ARGUMENTS
  21 ---------
  22
  23 .. flat-table::
  24     :header-rows:  0
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  26
  27
  28     -  .. row 1
  29
  30        -  int fd
  31
  32        -  File descriptor returned by a previous call to open().
  33
  34     -  .. row 2
  35
  36        -  void \*buf
  37
  38        -  Pointer to the buffer containing the PES data.
  39
  40     -  .. row 3
  41
  42        -  size_t count
  43
  44        -  Size of buf.
  45
  46
  47 DESCRIPTION
  48 -----------
  49
  50 This system call can only be used if VIDEO_SOURCE_MEMORY is selected
  51 in the ioctl call VIDEO_SELECT_SOURCE. The data provided shall be in
  52 PES format, unless the capability allows other formats. If O_NONBLOCK
  53 is not specified the function will block until buffer space is
  54 available. The amount of data to be transferred is implied by count.
  55
  56
  57 RETURN VALUE
  58 ------------
  59
  60 .. flat-table::
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  63
  64
  65     -  .. row 1
  66
  67        -  ``EPERM``
  68
  69        -  Mode VIDEO_SOURCE_MEMORY not selected.
  70
  71     -  .. row 2
  72
  73        -  ``ENOMEM``
  74
  75        -  Attempted to write more data than the internal buffer can hold.
  76
  77     -  .. row 3
  78
  79        -  ``EBADF``
  80
  81        -  fd is not a valid open file descriptor.