V4L/DVB (5345): ivtv driver for Conexant cx23416/cx23415 MPEG encoder/decoder
It took three core maintainers, over four years of work, eight new i2c
modules, eleven new V4L2 ioctls, three new DVB video ioctls, a Sliced
VBI API, a new MPEG encoder API, an enhanced DVB video MPEG decoding
API, major YUV/OSD contributions from Ian and John, web/wiki/svn/trac
support from Axel Thimm, (hardware) support from Hauppauge, support and
assistance from the v4l-dvb people and the many, many users of ivtv to
finally make it possible to merge this driver into the kernel.
Thank you all!
Signed-off-by: Kevin Thayer <nufan_wfk@yahoo.com>
Signed-off-by: Chris Kennedy <c@groovy.org>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: John P Harvey <john.p.harvey@btinternet.com>
Signed-off-by: Ian Armstrong <ian@iarmst.demon.co.uk>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/include/media/ivtv.h b/include/media/ivtv.h
new file mode 100644
index 0000000..412b48e
--- /dev/null
+++ b/include/media/ivtv.h
@@ -0,0 +1,65 @@
+/*
+ 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
+
+/* 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 __user *y_source; /* if NULL and type == V4L2_BUF_TYPE_VIDEO_OUTPUT,
+ then just switch to user DMA YUV output mode */
+ void __user *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)
+
+/* These are the VBI types as they appear in the embedded VBI private packets. */
+#define IVTV_SLICED_TYPE_TELETEXT_B (1)
+#define IVTV_SLICED_TYPE_CAPTION_525 (4)
+#define IVTV_SLICED_TYPE_WSS_625 (5)
+#define IVTV_SLICED_TYPE_VPS (7)
+
+#endif /* _LINUX_IVTV_H */