18c2ecf20Sopenharmony_ci.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later 28c2ecf20Sopenharmony_ci.. c:namespace:: DTV.audio 38c2ecf20Sopenharmony_ci 48c2ecf20Sopenharmony_ci.. _AUDIO_SET_ID: 58c2ecf20Sopenharmony_ci 68c2ecf20Sopenharmony_ci============ 78c2ecf20Sopenharmony_ciAUDIO_SET_ID 88c2ecf20Sopenharmony_ci============ 98c2ecf20Sopenharmony_ci 108c2ecf20Sopenharmony_ciName 118c2ecf20Sopenharmony_ci---- 128c2ecf20Sopenharmony_ci 138c2ecf20Sopenharmony_ciAUDIO_SET_ID 148c2ecf20Sopenharmony_ci 158c2ecf20Sopenharmony_ci.. attention:: This ioctl is deprecated 168c2ecf20Sopenharmony_ci 178c2ecf20Sopenharmony_ciSynopsis 188c2ecf20Sopenharmony_ci-------- 198c2ecf20Sopenharmony_ci 208c2ecf20Sopenharmony_ci.. c:macro:: AUDIO_SET_ID 218c2ecf20Sopenharmony_ci 228c2ecf20Sopenharmony_ci``int ioctl(int fd, AUDIO_SET_ID, int id)`` 238c2ecf20Sopenharmony_ci 248c2ecf20Sopenharmony_ciArguments 258c2ecf20Sopenharmony_ci--------- 268c2ecf20Sopenharmony_ci 278c2ecf20Sopenharmony_ci.. flat-table:: 288c2ecf20Sopenharmony_ci :header-rows: 0 298c2ecf20Sopenharmony_ci :stub-columns: 0 308c2ecf20Sopenharmony_ci 318c2ecf20Sopenharmony_ci - 328c2ecf20Sopenharmony_ci 338c2ecf20Sopenharmony_ci - int fd 348c2ecf20Sopenharmony_ci 358c2ecf20Sopenharmony_ci - File descriptor returned by a previous call to open(). 368c2ecf20Sopenharmony_ci 378c2ecf20Sopenharmony_ci - 388c2ecf20Sopenharmony_ci 398c2ecf20Sopenharmony_ci - int id 408c2ecf20Sopenharmony_ci 418c2ecf20Sopenharmony_ci - audio sub-stream id 428c2ecf20Sopenharmony_ci 438c2ecf20Sopenharmony_ciDescription 448c2ecf20Sopenharmony_ci----------- 458c2ecf20Sopenharmony_ci 468c2ecf20Sopenharmony_ciThis ioctl selects which sub-stream is to be decoded if a program or 478c2ecf20Sopenharmony_cisystem stream is sent to the video device. If no audio stream type is 488c2ecf20Sopenharmony_ciset the id has to be in [0xC0,0xDF] for MPEG sound, in [0x80,0x87] for 498c2ecf20Sopenharmony_ciAC3 and in [0xA0,0xA7] for LPCM. More specifications may follow for 508c2ecf20Sopenharmony_ciother stream types. If the stream type is set the id just specifies the 518c2ecf20Sopenharmony_cisubstream id of the audio stream and only the first 5 bits are 528c2ecf20Sopenharmony_cirecognized. 538c2ecf20Sopenharmony_ci 548c2ecf20Sopenharmony_ciReturn Value 558c2ecf20Sopenharmony_ci------------ 568c2ecf20Sopenharmony_ci 578c2ecf20Sopenharmony_ciOn success 0 is returned, on error -1 and the ``errno`` variable is set 588c2ecf20Sopenharmony_ciappropriately. The generic error codes are described at the 598c2ecf20Sopenharmony_ci:ref:`Generic Error Codes <gen-errors>` chapter. 60