audio-channel-select.rst (1134B)
1.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later 2.. c:namespace:: DTV.audio 3 4.. _AUDIO_CHANNEL_SELECT: 5 6==================== 7AUDIO_CHANNEL_SELECT 8==================== 9 10Name 11---- 12 13AUDIO_CHANNEL_SELECT 14 15.. attention:: This ioctl is deprecated 16 17Synopsis 18-------- 19 20.. c:macro:: AUDIO_CHANNEL_SELECT 21 22``int ioctl(int fd, AUDIO_CHANNEL_SELECT, struct audio_channel_select *select)`` 23 24Arguments 25--------- 26 27.. flat-table:: 28 :header-rows: 0 29 :stub-columns: 0 30 31 - 32 33 - int fd 34 35 - File descriptor returned by a previous call to open(). 36 37 - 38 39 - audio_channel_select_t ch 40 41 - Select the output format of the audio (mono left/right, stereo). 42 43Description 44----------- 45 46This ioctl is for Digital TV devices only. To control a V4L2 decoder use the 47V4L2 ``V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK`` control instead. 48 49This ioctl call asks the Audio Device to select the requested channel if 50possible. 51 52Return Value 53------------ 54 55On success 0 is returned, on error -1 and the ``errno`` variable is set 56appropriately. The generic error codes are described at the 57:ref:`Generic Error Codes <gen-errors>` chapter.