.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later .. c:namespace:: DTV.audio .. _AUDIO_CHANNEL_SELECT: ==================== AUDIO_CHANNEL_SELECT ==================== Name ---- AUDIO_CHANNEL_SELECT .. attention:: This ioctl is deprecated Synopsis -------- .. c:macro:: AUDIO_CHANNEL_SELECT ``int ioctl(int fd, AUDIO_CHANNEL_SELECT, struct audio_channel_select *select)`` Arguments --------- .. flat-table:: :header-rows: 0 :stub-columns: 0 - - int fd - File descriptor returned by a previous call to open(). - - audio_channel_select_t ch - Select the output format of the audio (mono left/right, stereo). Description ----------- This ioctl is for Digital TV devices only. To control a V4L2 decoder use the V4L2 ``V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK`` control instead. This ioctl call asks the Audio Device to select the requested channel if possible. Return Value ------------ On success 0 is returned, on error -1 and the ``errno`` variable is set appropriately. The generic error codes are described at the :ref:`Generic Error Codes ` chapter.