| /* |
| Public ivtv API header |
| Copyright (C) 2003-2004 Kevin Thayer <nufan_wfk at yahoo.com> |
| Copyright (C) 2004-2007 Hans Verkuil <hverkuil@xs4all.nl> |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| |
| #ifndef __LINUX_IVTV_H__ |
| #define __LINUX_IVTV_H__ |
| |
| |
| #include <linux/types.h> |
| #include <linux/videodev2.h> |
| |
| /* ivtv knows several distinct output modes: MPEG streaming, |
| YUV streaming, YUV updates through user DMA and the passthrough |
| mode. |
| |
| In order to clearly tell the driver that we are in user DMA |
| YUV mode you need to call IVTV_IOC_DMA_FRAME with y_source == NULL |
| first (althrough if you don't then the first time |
| DMA_FRAME is called the mode switch is done automatically). |
| |
| When you close the file handle the user DMA mode is exited again. |
| |
| While in one mode, you cannot use another mode (EBUSY is returned). |
| |
| All this means that if you want to change the YUV interlacing |
| for the user DMA YUV mode you first need to do call IVTV_IOC_DMA_FRAME |
| with y_source == NULL before you can set the correct format using |
| VIDIOC_S_FMT. |
| |
| Eventually all this should be replaced with a proper V4L2 API, |
| but for now we have to do it this way. */ |
| |
| struct ivtv_dma_frame { |
| enum v4l2_buf_type type; /* V4L2_BUF_TYPE_VIDEO_OUTPUT */ |
| __u32 pixelformat; /* 0 == same as destination */ |
| void *y_source; /* if NULL and type == V4L2_BUF_TYPE_VIDEO_OUTPUT, |
| then just switch to user DMA YUV output mode */ |
| void *uv_source; /* Unused for RGB pixelformats */ |
| struct v4l2_rect src; |
| struct v4l2_rect dst; |
| __u32 src_width; |
| __u32 src_height; |
| }; |
| |
| #define IVTV_IOC_DMA_FRAME _IOW ('V', BASE_VIDIOC_PRIVATE+0, struct ivtv_dma_frame) |
| |
| /* Deprecated defines: applications should use the defines from videodev2.h */ |
| #define IVTV_SLICED_TYPE_TELETEXT_B V4L2_MPEG_VBI_IVTV_TELETEXT_B |
| #define IVTV_SLICED_TYPE_CAPTION_525 V4L2_MPEG_VBI_IVTV_CAPTION_525 |
| #define IVTV_SLICED_TYPE_WSS_625 V4L2_MPEG_VBI_IVTV_WSS_625 |
| #define IVTV_SLICED_TYPE_VPS V4L2_MPEG_VBI_IVTV_VPS |
| |
| #endif /* _LINUX_IVTV_H */ |