1*4882a593Smuzhiyun.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later 2*4882a593Smuzhiyun.. c:namespace:: DTV.audio 3*4882a593Smuzhiyun 4*4882a593Smuzhiyun.. _AUDIO_SET_ID: 5*4882a593Smuzhiyun 6*4882a593Smuzhiyun============ 7*4882a593SmuzhiyunAUDIO_SET_ID 8*4882a593Smuzhiyun============ 9*4882a593Smuzhiyun 10*4882a593SmuzhiyunName 11*4882a593Smuzhiyun---- 12*4882a593Smuzhiyun 13*4882a593SmuzhiyunAUDIO_SET_ID 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun.. attention:: This ioctl is deprecated 16*4882a593Smuzhiyun 17*4882a593SmuzhiyunSynopsis 18*4882a593Smuzhiyun-------- 19*4882a593Smuzhiyun 20*4882a593Smuzhiyun.. c:macro:: AUDIO_SET_ID 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun``int ioctl(int fd, AUDIO_SET_ID, int id)`` 23*4882a593Smuzhiyun 24*4882a593SmuzhiyunArguments 25*4882a593Smuzhiyun--------- 26*4882a593Smuzhiyun 27*4882a593Smuzhiyun.. flat-table:: 28*4882a593Smuzhiyun :header-rows: 0 29*4882a593Smuzhiyun :stub-columns: 0 30*4882a593Smuzhiyun 31*4882a593Smuzhiyun - 32*4882a593Smuzhiyun 33*4882a593Smuzhiyun - int fd 34*4882a593Smuzhiyun 35*4882a593Smuzhiyun - File descriptor returned by a previous call to open(). 36*4882a593Smuzhiyun 37*4882a593Smuzhiyun - 38*4882a593Smuzhiyun 39*4882a593Smuzhiyun - int id 40*4882a593Smuzhiyun 41*4882a593Smuzhiyun - audio sub-stream id 42*4882a593Smuzhiyun 43*4882a593SmuzhiyunDescription 44*4882a593Smuzhiyun----------- 45*4882a593Smuzhiyun 46*4882a593SmuzhiyunThis ioctl selects which sub-stream is to be decoded if a program or 47*4882a593Smuzhiyunsystem stream is sent to the video device. If no audio stream type is 48*4882a593Smuzhiyunset the id has to be in [0xC0,0xDF] for MPEG sound, in [0x80,0x87] for 49*4882a593SmuzhiyunAC3 and in [0xA0,0xA7] for LPCM. More specifications may follow for 50*4882a593Smuzhiyunother stream types. If the stream type is set the id just specifies the 51*4882a593Smuzhiyunsubstream id of the audio stream and only the first 5 bits are 52*4882a593Smuzhiyunrecognized. 53*4882a593Smuzhiyun 54*4882a593SmuzhiyunReturn Value 55*4882a593Smuzhiyun------------ 56*4882a593Smuzhiyun 57*4882a593SmuzhiyunOn success 0 is returned, on error -1 and the ``errno`` variable is set 58*4882a593Smuzhiyunappropriately. The generic error codes are described at the 59*4882a593Smuzhiyun:ref:`Generic Error Codes <gen-errors>` chapter. 60