| .. -*- 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. |
