| 1 | /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ |
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| 2 | /* |
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| 3 | Public ivtv API header |
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| 4 | Copyright (C) 2003-2004 Kevin Thayer <nufan_wfk at yahoo.com> |
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| 5 | Copyright (C) 2004-2007 Hans Verkuil <hverkuil@xs4all.nl> |
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| 6 | |
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| 7 | This program is free software; you can redistribute it and/or modify |
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| 8 | it under the terms of the GNU General Public License as published by |
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| 9 | the Free Software Foundation; either version 2 of the License, or |
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| 10 | (at your option) any later version. |
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| 11 | |
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| 12 | This program is distributed in the hope that it will be useful, |
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| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 15 | GNU General Public License for more details. |
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| 16 | |
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| 17 | You should have received a copy of the GNU General Public License |
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| 18 | along with this program; if not, write to the Free Software |
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| 19 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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| 20 | */ |
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| 21 | |
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| 22 | #ifndef __LINUX_IVTV_H__ |
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| 23 | #define __LINUX_IVTV_H__ |
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| 24 | |
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| 25 | #include <linux/compiler.h> |
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| 26 | #include <linux/types.h> |
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| 27 | #include <linux/videodev2.h> |
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| 28 | |
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| 29 | /* ivtv knows several distinct output modes: MPEG streaming, |
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| 30 | YUV streaming, YUV updates through user DMA and the passthrough |
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| 31 | mode. |
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| 32 | |
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| 33 | In order to clearly tell the driver that we are in user DMA |
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| 34 | YUV mode you need to call IVTV_IOC_DMA_FRAME with y_source == NULL |
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| 35 | first (althrough if you don't then the first time |
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| 36 | DMA_FRAME is called the mode switch is done automatically). |
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| 37 | |
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| 38 | When you close the file handle the user DMA mode is exited again. |
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| 39 | |
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| 40 | While in one mode, you cannot use another mode (EBUSY is returned). |
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| 41 | |
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| 42 | All this means that if you want to change the YUV interlacing |
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| 43 | for the user DMA YUV mode you first need to do call IVTV_IOC_DMA_FRAME |
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| 44 | with y_source == NULL before you can set the correct format using |
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| 45 | VIDIOC_S_FMT. |
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| 46 | |
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| 47 | Eventually all this should be replaced with a proper V4L2 API, |
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| 48 | but for now we have to do it this way. */ |
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| 49 | |
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| 50 | struct ivtv_dma_frame { |
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| 51 | enum v4l2_buf_type type; /* V4L2_BUF_TYPE_VIDEO_OUTPUT */ |
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| 52 | __u32 pixelformat; /* 0 == same as destination */ |
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| 53 | void __user *y_source; /* if NULL and type == V4L2_BUF_TYPE_VIDEO_OUTPUT, |
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| 54 | then just switch to user DMA YUV output mode */ |
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| 55 | void __user *uv_source; /* Unused for RGB pixelformats */ |
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| 56 | struct v4l2_rect src; |
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| 57 | struct v4l2_rect dst; |
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| 58 | __u32 src_width; |
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| 59 | __u32 src_height; |
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| 60 | }; |
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| 61 | |
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| 62 | #define IVTV_IOC_DMA_FRAME _IOW ('V', BASE_VIDIOC_PRIVATE+0, struct ivtv_dma_frame) |
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| 63 | |
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| 64 | /* Select the passthrough mode (if the argument is non-zero). In the passthrough |
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| 65 | mode the output of the encoder is passed immediately into the decoder. */ |
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| 66 | #define IVTV_IOC_PASSTHROUGH_MODE _IOW ('V', BASE_VIDIOC_PRIVATE+1, int) |
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| 67 | |
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| 68 | /* Deprecated defines: applications should use the defines from videodev2.h */ |
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| 69 | #define IVTV_SLICED_TYPE_TELETEXT_B V4L2_MPEG_VBI_IVTV_TELETEXT_B |
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| 70 | #define IVTV_SLICED_TYPE_CAPTION_525 V4L2_MPEG_VBI_IVTV_CAPTION_525 |
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| 71 | #define IVTV_SLICED_TYPE_WSS_625 V4L2_MPEG_VBI_IVTV_WSS_625 |
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| 72 | #define IVTV_SLICED_TYPE_VPS V4L2_MPEG_VBI_IVTV_VPS |
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| 73 | |
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| 74 | #endif /* _LINUX_IVTV_H */ |
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| 75 | |
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