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

   1 .. -*- coding: utf-8; mode: rst -*-
   2
   3 .. _audio_fwrite:
   4
   5 DVB audio write()
   6 =================
   7
   8 Description
   9 -----------
  10
  11 This system call can only be used if AUDIO_SOURCE_MEMORY is selected
  12 in the ioctl call AUDIO_SELECT_SOURCE. The data provided shall be in
  13 PES format. If O_NONBLOCK is not specified the function will block
  14 until buffer space is available. The amount of data to be transferred is
  15 implied by count.
  16
  17 Synopsis
  18 --------
  19
  20 .. c:function:: size_t write(int fd, const void *buf, size_t count)
  21
  22 Arguments
  23 ----------
  24
  25
  26
  27 .. flat-table::
  28     :header-rows:  0
  29     :stub-columns: 0
  30
  31
  32     -  .. row 1
  33
  34        -  int fd
  35
  36        -  File descriptor returned by a previous call to open().
  37
  38     -  .. row 2
  39
  40        -  void \*buf
  41
  42        -  Pointer to the buffer containing the PES data.
  43
  44     -  .. row 3
  45
  46        -  size_t count
  47
  48        -  Size of buf.
  49
  50
  51 Return Value
  52 ------------
  53
  54
  55
  56 .. flat-table::
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  59
  60
  61     -  .. row 1
  62
  63        -  ``EPERM``
  64
  65        -  Mode AUDIO_SOURCE_MEMORY not selected.
  66
  67     -  .. row 2
  68
  69        -  ``ENOMEM``
  70
  71        -  Attempted to write more data than the internal buffer can hold.
  72
  73     -  .. row 3
  74
  75        -  ``EBADF``
  76
  77        -  fd is not a valid open file descriptor.
  78
  79
  80