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1 | /* |
2 | Public ivtv API header |
3 | Copyright (C) 2003-2004 Kevin Thayer <nufan_wfk at yahoo.com> |
4 | Copyright (C) 2004-2007 Hans Verkuil <hverkuil@xs4all.nl> |
5 | |
6 | This program is free software; you can redistribute it and/or modify |
7 | it under the terms of the GNU General Public License as published by |
8 | the Free Software Foundation; either version 2 of the License, or |
9 | (at your option) any later version. |
10 | |
11 | This program is distributed in the hope that it will be useful, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | GNU General Public License for more details. |
15 | |
16 | You should have received a copy of the GNU General Public License |
17 | along with this program; if not, write to the Free Software |
18 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
19 | */ |
20 | |
21 | #ifndef __LINUX_IVTV_H__ |
22 | #define __LINUX_IVTV_H__ |
23 | |
24 | #include <linux/compiler.h> |
25 | #include <linux/types.h> |
26 | #include <linux/videodev2.h> |
27 | |
28 | /* ivtv knows several distinct output modes: MPEG streaming, |
29 | YUV streaming, YUV updates through user DMA and the passthrough |
30 | mode. |
31 | |
32 | In order to clearly tell the driver that we are in user DMA |
33 | YUV mode you need to call IVTV_IOC_DMA_FRAME with y_source == NULL |
34 | first (althrough if you don't then the first time |
35 | DMA_FRAME is called the mode switch is done automatically). |
36 | |
37 | When you close the file handle the user DMA mode is exited again. |
38 | |
39 | While in one mode, you cannot use another mode (EBUSY is returned). |
40 | |
41 | All this means that if you want to change the YUV interlacing |
42 | for the user DMA YUV mode you first need to do call IVTV_IOC_DMA_FRAME |
43 | with y_source == NULL before you can set the correct format using |
44 | VIDIOC_S_FMT. |
45 | |
46 | Eventually all this should be replaced with a proper V4L2 API, |
47 | but for now we have to do it this way. */ |
48 | |
49 | struct ivtv_dma_frame { |
50 | enum v4l2_buf_type type; /* V4L2_BUF_TYPE_VIDEO_OUTPUT */ |
51 | __u32 pixelformat; /* 0 == same as destination */ |
52 | void __user *y_source; /* if NULL and type == V4L2_BUF_TYPE_VIDEO_OUTPUT, |
53 | then just switch to user DMA YUV output mode */ |
54 | void __user *uv_source; /* Unused for RGB pixelformats */ |
55 | struct v4l2_rect src; |
56 | struct v4l2_rect dst; |
57 | __u32 src_width; |
58 | __u32 src_height; |
59 | }; |
60 | |
61 | #define IVTV_IOC_DMA_FRAME _IOW ('V', BASE_VIDIOC_PRIVATE+0, struct ivtv_dma_frame) |
62 | |
63 | /* Deprecated defines: applications should use the defines from videodev2.h */ |
64 | #define IVTV_SLICED_TYPE_TELETEXT_B V4L2_MPEG_VBI_IVTV_TELETEXT_B |
65 | #define IVTV_SLICED_TYPE_CAPTION_525 V4L2_MPEG_VBI_IVTV_CAPTION_525 |
66 | #define IVTV_SLICED_TYPE_WSS_625 V4L2_MPEG_VBI_IVTV_WSS_625 |
67 | #define IVTV_SLICED_TYPE_VPS V4L2_MPEG_VBI_IVTV_VPS |
68 | |
69 | #endif /* _LINUX_IVTV_H */ |
70 |
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