projects / deliverable / linux.git / blame
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|---|---|---|
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1 | .. -*- coding: utf-8; mode: rst -*- |
| 2 | ||
| 3 | .. _VIDEO_SELECT_SOURCE: | |
| 4 | ||
| 586027ce | 5 | =================== |
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6 | VIDEO_SELECT_SOURCE |
| 7 | =================== | |
| 8 | ||
| 15e7d615 | 9 | Name |
| 586027ce | 10 | ---- |
| 47d23e36 | 11 | |
| 586027ce | 12 | VIDEO_SELECT_SOURCE |
| 47d23e36 | 13 | |
| cf8076c3 | 14 | .. attention:: This ioctl is deprecated. |
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15 | |
| 16 | Synopsis | |
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17 | -------- |
| 18 | ||
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19 | .. c:function:: int ioctl(fd, VIDEO_SELECT_SOURCE, video_stream_source_t source) |
| 20 | :name: VIDEO_SELECT_SOURCE | |
| 47d23e36 | 21 | |
| 47d23e36 | 22 | |
| 15e7d615 | 23 | Arguments |
| 586027ce | 24 | --------- |
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25 | |
| 26 | .. flat-table:: | |
| 27 | :header-rows: 0 | |
| 28 | :stub-columns: 0 | |
| 29 | ||
| 30 | ||
| 31 | - .. row 1 | |
| 32 | ||
| 33 | - int fd | |
| 34 | ||
| 35 | - File descriptor returned by a previous call to open(). | |
| 36 | ||
| 37 | - .. row 2 | |
| 38 | ||
| 39 | - int request | |
| 40 | ||
| 41 | - Equals VIDEO_SELECT_SOURCE for this command. | |
| 42 | ||
| 43 | - .. row 3 | |
| 44 | ||
| 45 | - video_stream_source_t source | |
| 46 | ||
| 47 | - Indicates which source shall be used for the Video stream. | |
| 48 | ||
| 49 | ||
| 15e7d615 | 50 | Description |
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51 | ----------- |
| 52 | ||
| 53 | This ioctl is for DVB devices only. This ioctl was also supported by the | |
| 54 | V4L2 ivtv driver, but that has been replaced by the ivtv-specific | |
| 55 | ``IVTV_IOC_PASSTHROUGH_MODE`` ioctl. | |
| 56 | ||
| 57 | This ioctl call informs the video device which source shall be used for | |
| 58 | the input data. The possible sources are demux or memory. If memory is | |
| 59 | selected, the data is fed to the video device through the write command. | |
| 60 | ||
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61 | .. c:type:: video_stream_source_t |
| 62 | ||
| 63 | .. code-block:: c | |
| 64 | ||
| 65 | typedef enum { | |
| 66 | VIDEO_SOURCE_DEMUX, /* Select the demux as the main source */ | |
| 67 | VIDEO_SOURCE_MEMORY /* If this source is selected, the stream | |
| 68 | comes from the user through the write | |
| 69 | system call */ | |
| 70 | } video_stream_source_t; | |
| 586027ce | 71 | |
| 15e7d615 | 72 | Return Value |
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73 | ------------ |
| 74 | ||
| 75 | On success 0 is returned, on error -1 and the ``errno`` variable is set | |
| 76 | appropriately. The generic error codes are described at the | |
| 77 | :ref:`Generic Error Codes <gen-errors>` chapter. |