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1 | .. -*- coding: utf-8; mode: rst -*- |
2 | ||
3 | .. _AUDIO_CHANNEL_SELECT: | |
4 | ||
586027ce | 5 | ==================== |
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6 | AUDIO_CHANNEL_SELECT |
7 | ==================== | |
8 | ||
15e7d615 | 9 | Name |
586027ce | 10 | ---- |
47d23e36 | 11 | |
586027ce | 12 | AUDIO_CHANNEL_SELECT |
47d23e36 | 13 | |
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14 | |
15 | Synopsis | |
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16 | -------- |
17 | ||
5929cb17 | 18 | .. cpp:function:: int ioctl(int fd, int request = AUDIO_CHANNEL_SELECT, audio_channel_select_t) |
47d23e36 | 19 | |
47d23e36 | 20 | |
15e7d615 | 21 | Arguments |
586027ce | 22 | --------- |
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23 | |
24 | .. flat-table:: | |
25 | :header-rows: 0 | |
26 | :stub-columns: 0 | |
27 | ||
28 | ||
29 | - .. row 1 | |
30 | ||
31 | - int fd | |
32 | ||
33 | - File descriptor returned by a previous call to open(). | |
34 | ||
35 | - .. row 2 | |
36 | ||
37 | - int request | |
38 | ||
39 | - Equals AUDIO_CHANNEL_SELECT for this command. | |
40 | ||
41 | - .. row 3 | |
42 | ||
43 | - audio_channel_select_t ch | |
44 | ||
45 | - Select the output format of the audio (mono left/right, stereo). | |
46 | ||
47 | ||
15e7d615 | 48 | Description |
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49 | ----------- |
50 | ||
51 | This ioctl is for DVB devices only. To control a V4L2 decoder use the | |
52 | V4L2 ``V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK`` control instead. | |
53 | ||
54 | This ioctl call asks the Audio Device to select the requested channel if | |
55 | possible. | |
56 | ||
57 | ||
15e7d615 | 58 | Return Value |
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59 | ------------ |
60 | ||
61 | On success 0 is returned, on error -1 and the ``errno`` variable is set | |
62 | appropriately. The generic error codes are described at the | |
63 | :ref:`Generic Error Codes <gen-errors>` chapter. |