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Diffstat (limited to 'Documentation/media/uapi/dvb/audio-set-id.rst')
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diff --git a/Documentation/media/uapi/dvb/audio-set-id.rst b/Documentation/media/uapi/dvb/audio-set-id.rst new file mode 100644 index 000000000000..a664dc1955cb --- /dev/null +++ b/Documentation/media/uapi/dvb/audio-set-id.rst @@ -0,0 +1,65 @@ +.. -*- coding: utf-8; mode: rst -*- + +.. _AUDIO_SET_ID: + +============ +AUDIO_SET_ID +============ + +Name +---- + +AUDIO_SET_ID + + +Synopsis +-------- + +.. cpp:function:: int ioctl(int fd, int request = AUDIO_SET_ID, int id) + + +Arguments +--------- + +.. flat-table:: + :header-rows: 0 + :stub-columns: 0 + + + - .. row 1 + + - int fd + + - File descriptor returned by a previous call to open(). + + - .. row 2 + + - int request + + - Equals AUDIO_SET_ID for this command. + + - .. row 3 + + - int id + + - audio sub-stream id + + +Description +----------- + +This ioctl selects which sub-stream is to be decoded if a program or +system stream is sent to the video device. If no audio stream type is +set the id has to be in [0xC0,0xDF] for MPEG sound, in [0x80,0x87] for +AC3 and in [0xA0,0xA7] for LPCM. More specifications may follow for +other stream types. If the stream type is set the id just specifies the +substream id of the audio stream and only the first 5 bits are +recognized. + + +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 <gen-errors>` chapter. |