1 .. -*- coding: utf-8; mode: rst -*-
18 .. cpp:function:: int ioctl(int fd, int request = AUDIO_SET_ID, int id)
33 - File descriptor returned by a previous call to open().
39 - Equals AUDIO_SET_ID for this command.
51 This ioctl selects which sub-stream is to be decoded if a program or
52 system stream is sent to the video device. If no audio stream type is
53 set the id has to be in [0xC0,0xDF] for MPEG sound, in [0x80,0x87] for
54 AC3 and in [0xA0,0xA7] for LPCM. More specifications may follow for
55 other stream types. If the stream type is set the id just specifies the
56 substream id of the audio stream and only the first 5 bits are
63 On success 0 is returned, on error -1 and the ``errno`` variable is set
64 appropriately. The generic error codes are described at the
65 :ref:`Generic Error Codes <gen-errors>` chapter.