projects / deliverable / linux.git / blame
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|---|---|---|
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1 | .. -*- coding: utf-8; mode: rst -*- |
| 2 | ||
| 3 | .. _VIDEO_COMMAND: | |
| 4 | ||
| 586027ce | 5 | ============= |
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6 | VIDEO_COMMAND |
| 7 | ============= | |
| 8 | ||
| 15e7d615 | 9 | Name |
| 586027ce | 10 | ---- |
| 47d23e36 | 11 | |
| 586027ce | 12 | VIDEO_COMMAND |
| 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(int fd, VIDEO_COMMAND, struct video_command *cmd) |
| 20 | :name: VIDEO_COMMAND | |
| 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_COMMAND for this command. | |
| 42 | ||
| 43 | - .. row 3 | |
| 44 | ||
| 45 | - struct video_command \*cmd | |
| 46 | ||
| 47 | - Commands the decoder. | |
| 48 | ||
| 49 | ||
| 15e7d615 | 50 | Description |
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51 | ----------- |
| 52 | ||
| 53 | This ioctl is obsolete. Do not use in new drivers. For V4L2 decoders | |
| 54 | this ioctl has been replaced by the | |
| 55 | :ref:`VIDIOC_DECODER_CMD` ioctl. | |
| 56 | ||
| 57 | This ioctl commands the decoder. The ``video_command`` struct is a | |
| 58 | subset of the ``v4l2_decoder_cmd`` struct, so refer to the | |
| 59 | :ref:`VIDIOC_DECODER_CMD` documentation for | |
| 60 | more information. | |
| 61 | ||
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62 | .. c:type:: struct video_command |
| 63 | ||
| 64 | .. code-block:: c | |
| 65 | ||
| 66 | /* The structure must be zeroed before use by the application | |
| 67 | This ensures it can be extended safely in the future. */ | |
| 68 | struct video_command { | |
| 69 | __u32 cmd; | |
| 70 | __u32 flags; | |
| 71 | union { | |
| 72 | struct { | |
| 73 | __u64 pts; | |
| 74 | } stop; | |
| 75 | ||
| 76 | struct { | |
| 77 | /* 0 or 1000 specifies normal speed, | |
| 78 | 1 specifies forward single stepping, | |
| 79 | -1 specifies backward single stepping, | |
| 80 | >1: playback at speed/1000 of the normal speed, | |
| 81 | <-1: reverse playback at (-speed/1000) of the normal speed. */ | |
| 82 | __s32 speed; | |
| 83 | __u32 format; | |
| 84 | } play; | |
| 85 | ||
| 86 | struct { | |
| 87 | __u32 data[16]; | |
| 88 | } raw; | |
| 89 | }; | |
| 90 | }; | |
| 91 | ||
| 586027ce | 92 | |
| 15e7d615 | 93 | Return Value |
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94 | ------------ |
| 95 | ||
| 96 | On success 0 is returned, on error -1 and the ``errno`` variable is set | |
| 97 | appropriately. The generic error codes are described at the | |
| 98 | :ref:`Generic Error Codes <gen-errors>` chapter. |