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74 lines
3.0 KiB
74 lines
3.0 KiB
/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ |
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/* |
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Public ivtv API header |
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Copyright (C) 2003-2004 Kevin Thayer <nufan_wfk at yahoo.com> |
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Copyright (C) 2004-2007 Hans Verkuil <[email protected]> |
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2 of the License, or |
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(at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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#ifndef __LINUX_IVTV_H__ |
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#define __LINUX_IVTV_H__ |
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#include <linux/compiler.h> |
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#include <linux/types.h> |
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#include <linux/videodev2.h> |
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/* ivtv knows several distinct output modes: MPEG streaming, |
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YUV streaming, YUV updates through user DMA and the passthrough |
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mode. |
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In order to clearly tell the driver that we are in user DMA |
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YUV mode you need to call IVTV_IOC_DMA_FRAME with y_source == NULL |
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first (althrough if you don't then the first time |
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DMA_FRAME is called the mode switch is done automatically). |
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When you close the file handle the user DMA mode is exited again. |
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While in one mode, you cannot use another mode (EBUSY is returned). |
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All this means that if you want to change the YUV interlacing |
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for the user DMA YUV mode you first need to do call IVTV_IOC_DMA_FRAME |
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with y_source == NULL before you can set the correct format using |
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VIDIOC_S_FMT. |
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Eventually all this should be replaced with a proper V4L2 API, |
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but for now we have to do it this way. */ |
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struct ivtv_dma_frame { |
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enum v4l2_buf_type type; /* V4L2_BUF_TYPE_VIDEO_OUTPUT */ |
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__u32 pixelformat; /* 0 == same as destination */ |
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void __user *y_source; /* if NULL and type == V4L2_BUF_TYPE_VIDEO_OUTPUT, |
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then just switch to user DMA YUV output mode */ |
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void __user *uv_source; /* Unused for RGB pixelformats */ |
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struct v4l2_rect src; |
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struct v4l2_rect dst; |
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__u32 src_width; |
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__u32 src_height; |
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}; |
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#define IVTV_IOC_DMA_FRAME _IOW ('V', BASE_VIDIOC_PRIVATE+0, struct ivtv_dma_frame) |
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/* Select the passthrough mode (if the argument is non-zero). In the passthrough |
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mode the output of the encoder is passed immediately into the decoder. */ |
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#define IVTV_IOC_PASSTHROUGH_MODE _IOW ('V', BASE_VIDIOC_PRIVATE+1, int) |
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/* Deprecated defines: applications should use the defines from videodev2.h */ |
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#define IVTV_SLICED_TYPE_TELETEXT_B V4L2_MPEG_VBI_IVTV_TELETEXT_B |
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#define IVTV_SLICED_TYPE_CAPTION_525 V4L2_MPEG_VBI_IVTV_CAPTION_525 |
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#define IVTV_SLICED_TYPE_WSS_625 V4L2_MPEG_VBI_IVTV_WSS_625 |
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#define IVTV_SLICED_TYPE_VPS V4L2_MPEG_VBI_IVTV_VPS |
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#endif /* _LINUX_IVTV_H */
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