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1a0adaf3 HV |
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 | ||
51b39dfa HV |
21 | #ifndef __LINUX_IVTV_H__ |
22 | #define __LINUX_IVTV_H__ | |
23 | ||
24 | #ifdef __KERNEL__ | |
25 | #include <linux/compiler.h> /* need __user */ | |
26 | #else | |
27 | #define __user | |
28 | #endif | |
29 | #include <linux/types.h> | |
1a0adaf3 HV |
30 | |
31 | /* ivtv knows several distinct output modes: MPEG streaming, | |
32 | YUV streaming, YUV updates through user DMA and the passthrough | |
33 | mode. | |
34 | ||
35 | In order to clearly tell the driver that we are in user DMA | |
36 | YUV mode you need to call IVTV_IOC_DMA_FRAME with y_source == NULL | |
37 | first (althrough if you don't then the first time | |
38 | DMA_FRAME is called the mode switch is done automatically). | |
39 | ||
40 | When you close the file handle the user DMA mode is exited again. | |
41 | ||
42 | While in one mode, you cannot use another mode (EBUSY is returned). | |
43 | ||
44 | All this means that if you want to change the YUV interlacing | |
45 | for the user DMA YUV mode you first need to do call IVTV_IOC_DMA_FRAME | |
46 | with y_source == NULL before you can set the correct format using | |
47 | VIDIOC_S_FMT. | |
48 | ||
49 | Eventually all this should be replaced with a proper V4L2 API, | |
50 | but for now we have to do it this way. */ | |
51 | ||
52 | struct ivtv_dma_frame { | |
53 | enum v4l2_buf_type type; /* V4L2_BUF_TYPE_VIDEO_OUTPUT */ | |
54 | __u32 pixelformat; /* 0 == same as destination */ | |
55 | void __user *y_source; /* if NULL and type == V4L2_BUF_TYPE_VIDEO_OUTPUT, | |
56 | then just switch to user DMA YUV output mode */ | |
57 | void __user *uv_source; /* Unused for RGB pixelformats */ | |
58 | struct v4l2_rect src; | |
59 | struct v4l2_rect dst; | |
60 | __u32 src_width; | |
61 | __u32 src_height; | |
62 | }; | |
63 | ||
64 | #define IVTV_IOC_DMA_FRAME _IOW ('V', BASE_VIDIOC_PRIVATE+0, struct ivtv_dma_frame) | |
65 | ||
66 | /* These are the VBI types as they appear in the embedded VBI private packets. */ | |
67 | #define IVTV_SLICED_TYPE_TELETEXT_B (1) | |
68 | #define IVTV_SLICED_TYPE_CAPTION_525 (4) | |
69 | #define IVTV_SLICED_TYPE_WSS_625 (5) | |
70 | #define IVTV_SLICED_TYPE_VPS (7) | |
71 | ||
72 | #endif /* _LINUX_IVTV_H */ |