> > > > Have V4L2_FIELD_SEQ_TB + V4L2_FIELD_SEQ_BT now, ok?
> > > I think that's a bad idea. See again, Ronald Bultje confirmed (if I
> > > understood correctly) he wants the _older_ field first, not top or
> > > bottom.
> > I understood it exactly the other way around: first field is always
> > the temporal first. Ronald?
>
> I *do* want to know whether it's topfirst or bottomfirst. (i.e., the
> spatial top/bottom is first in time and thus sequentially first in the
> JPEG buffer). The first field in this buffer is always the one which was
> first in time, that's correct.
Exactly this way I understood it.
> The above solution would work fine.
Ok, then I'd leave it as-is.
> > read/write/streaming not being optional (but mandatory like select
> > support)?
>
> Sounds fine, I think... Isn't that the case for audio cards as well?
> (both write/read and mmap must be supported).
ALSA yes, not sure about OSS.
> I like this type field a lot! Can this be added to the cropping set/get
> ioctl()s as well?
Sounds reasonable, done.
> On Wed, 2002-10-16 at 10:37, Gerd Knorr wrote:
> > > VIDIOC_G_FMT, VIDIOC_S_FMT - We add v4l2_window, so these are the video
> > > or raw vbi capture, output or video overlay parameters.
> > That would also obsolete VIDIOC_G_WIN + VIDIOC_S_WIN.
>
> I don't think I like that. They've got nothing to do with each other
> from a userspace point of view, so keep them separate please. See below.
After all, the it is just another kind of buffer, the difference isn't
that big IMHO.
> > > VIDIOC_TRY_FMT - Like VIDIOC_S_FMT, but does not change driver state.
> > Good idea, better than my approach.
>
> Hmm...
>
> I think it's okay to make them behave the same, but S_FMT is really much
> more complex than TRY_FMT. TRY_FMT should be kept simple. width, height,
> buffer-type and format, that's really all you need. Would work for both
> overlay and capture.
I like the idea to use exactly the same struct for TRY_FMT + S_FMT.
It helps to avoid stupid mistakes. Some application can do a TRY_FMT,
check the format it got back, and if it is happy with the result it can
simply pass the same struct to S_FMT and be done with it. No need to
copy the fields from one struct to another. And we can be sure that we
havn't forgotten something. For example the application can also return
which fields it will use if you pass in V4L2_FIELD_ANY ...
> > Hmm. Maybe we should continue to go the way with making overlay not
> > being that special any more. We could use v4l2_buffer to setup multiple
> > buffers within the offscreen area:
>
> For the driver, this may actually sound reasonable. From a userspace
> (application) point of view, I don't see much reason to do that. I mean,
> why would you? I don't see why it would make an application developer's
> life easier.
It isn't intended to make an application developer life easier.
> > Then the applications can either use the classic way
> > "VIDIOC_OVERLAY(on/off)" or STREAMON / QBUF / DQBUF / STREAMOFF.
>
> I think I prefer the older approach of video window and all that. Why?
It does still work. format->type = VIDEO_OVERLAY, format->win = window
parameters, call S_FMT with that, OVERLAY(on), done.
> Now, for overlay to be enabled in the new approach, I need to think
> about buffers. But what do buffers (from a user point of view) have to
> do with overlay? Overlay is just frame->graphicscard. I think the older
> approach is just simpler and more natural.
The new approach allows to do some new things. One common approach to
sync tv overlay and monitor refresh is the following:
(1) setup three buffers in offscreen memory.
(2) let the video source fill these tree buffers, one after another
and start over with the first one once the third is full.
(3) the graphics card switches the overlay to the freshest, completely
filled buffer during the vertical blank intervall.
This avoids artefacts due to the video data being updated while the
gfx card reads them. You'll see those nicely if the camera moves.
The approach mentioned above _allows_ applications to do that using the
well-known v4l2 streaming API (i.e. we don't have to add a bunch of new
concepts and ioctls for that). It doesn't force applications into doing
that.
> Btw, Gerd, can you send a newest version of videodev2.h? I'm curious how
> it looks currently.
see below.
I also did some other cleanups. bitfields meant to be sets are allways
named "fooset" now. New small struct for fractions. Use the __xxx
types from <asm/types.h> everythere. Probably some other minor stuff
I forgot ...
Open issues:
* for S_FBUF I'd like to pass a device instead of a physical address,
but there seems to be no standard way yet to pass this info between
kernel + userland ...
* struct tuner: add some type field here too? For radio/tv/...? What
about tuning analog SAT tv? Should we add something for that? The
digital stuff I'd leave to the well-established DVB API.
* Documentation: Where will the updated API docs appear on the web?
I'd like to have some up-to-date URL in the header file when
submitting stuff to Linus. Or should we also ship that with the
kernel maybe?
Gerd
==============================[ cut here ]==============================
#ifndef __LINUX_VIDEODEV2_H
#define __LINUX_VIDEODEV2_H
/*
* Video for Linux Two
*
* Header file for v4l or V4L2 drivers and applications, for
* Linux kernels 2.2.x or 2.4.x.
*
* See http://www.thedirks.org/v4l2/ for API specs and other
* v4l2 documentation.
*
* Author: Bill Dirks <[EMAIL PROTECTED]>
* Justin Schoeman
* et al.
*/
#define V4L2_MAJOR_VERSION 0
#define V4L2_MINOR_VERSION 20
/*
* M I S C E L L A N E O U S
*/
/* Four-character-code (FOURCC) */
#define v4l2_fourcc(a,b,c,d)\
(((__u32)(a)<<0)|((__u32)(b)<<8)|((__u32)(c)<<16)|((__u32)(d)<<24))
/*
* E N U M S
*/
enum v4l2_field {
V4L2_FIELD_ANY = 0, /* driver can choose from none,
top, bottom, interlaced
depending on whatever it thinks
is approximate ... */
V4L2_FIELD_NONE = 1, /* this device has no fields ... */
V4L2_FIELD_TOP = 2, /* top field only */
V4L2_FIELD_BOTTOM = 3, /* bottom field only */
V4L2_FIELD_INTERLACED = 4, /* both fields interlaced */
V4L2_FIELD_SEQ_TB = 5, /* both fields sequential into one
buffer, top-bottom order */
V4L2_FIELD_SEQ_BT = 6, /* same as above + bottom-top order */
V4L2_FIELD_ALTERNATE = 7, /* both fields alternating into
separate buffers */
};
#define V4L2_FIELD_HAS_TOP(field) \
((field) == V4L2_FIELD_TOP ||\
(field) == V4L2_FIELD_INTERLACED ||\
(field) == V4L2_FIELD_SEQ_TB ||\
(field) == V4L2_FIELD_SEQ_BT)
#define V4L2_FIELD_HAS_BOTTOM(field) \
((field) == V4L2_FIELD_BOTTOM ||\
(field) == V4L2_FIELD_INTERLACED ||\
(field) == V4L2_FIELD_SEQ_TB ||\
(field) == V4L2_FIELD_SEQ_BT)
#define V4L2_FIELD_HAS_BOTH(field) \
((field) == V4L2_FIELD_INTERLACED ||\
(field) == V4L2_FIELD_SEQ_TB ||\
(field) == V4L2_FIELD_SEQ_BT)
enum v4l2_buf_type {
V4L2_BUF_TYPE_VIDEO_CAPTURE = 1,
V4L2_BUF_TYPE_VIDEO_OUTPUT = 2,
V4L2_BUF_TYPE_VIDEO_OVERLAY = 3,
V4L2_BUF_TYPE_VBI_CAPTURE = 4,
V4L2_BUF_TYPE_VBI_OUTPUT = 5,
V4L2_BUF_TYPE_PRIVATE = 0x80,
};
enum v4l2_ctrl_type {
V4L2_CTRL_TYPE_INTEGER = 1,
V4L2_CTRL_TYPE_BOOLEAN = 2,
V4L2_CTRL_TYPE_MENU = 3,
V4L2_CTRL_TYPE_BUTTON = 4,
};
enum v4l2_memory {
V4L2_MEMORY_MMAP = 1,
V4L2_MEMORY_USERPTR = 2,
V4L2_MEMORY_OVERLAY = 3,
};
/* see also http://vektor.theorem.ca/graphics/ycbcr/ */
enum v4l2_colorspace {
/* ITU-R 601 -- broadcast NTSC/PAL */
V4L2_COLORSPACE_SMPTE170M = 1,
/* 1125-Line (US) HDTV */
V4L2_COLORSPACE_SMPTE240M = 2,
/* HD and modern captures. */
V4L2_COLORSPACE_REC709 = 3,
/* broken BT878 extents (601, luma range 16-253 instead of 16-235) */
V4L2_COLORSPACE_BT878 = 4,
/* These should be useful. Assume 601 extents. */
V4L2_COLORSPACE_470_SYSTEM_M = 5,
V4L2_COLORSPACE_470_SYSTEM_BG = 6,
/* I know there will be cameras that send this. So, this is
* unspecified chromaticities and full 0-255 on each of the
* Y'CbCr components
*/
V4L2_COLORSPACE_JPEG = 7,
/* For RGB colourspaces, this is probably a good start. */
V4L2_COLORSPACE_SRGB = 8,
};
struct v4l2_rect {
__u32 left;
__u32 top;
__u32 width;
__u32 height;
};
struct v4l2_fract {
__u32 numerator;
__u32 denominator;
};
/*
* D R I V E R C A P A B I L I T I E S
*/
struct v4l2_capability
{
__u8 name[32]; /* Descriptive, and unique */
__u32 capabilities; /* Device capabilities */
__u32 flags; /* Feature flags, see below */
__u32 reserved[4];
};
/* Values for 'capabilities' field */
#define V4L2_CAP_VIDEO_CAPTURE 0x00000001 /* Is a video capture device */
#define V4L2_CAP_VIDEO_OUTPUT 0x00000002 /* Is a video output device */
#define V4L2_CAP_VIDEO_OVERLAY 0x00000004 /* Can do video overlay */
#define V4L2_CAP_VBI_CAPTURE 0x00000010 /* Is a VBI capture device */
#define V4L2_CAP_VBI_OUTPUT 0x00000020 /* Is a VBI output device */
#define V4L2_CAP_RDS_CAPTURE 0x00000100 /* RDS data capture */
#define V4L2_CAP_TUNER 0x00010000 /* Has a tuner */
/*
* V I D E O I M A G E F O R M A T
*/
struct v4l2_pix_format
{
__u32 width;
__u32 height;
__u32 pixelformat;
enum v4l2_field field;
__u32 bytesperline; /* for padding, zero if unused */
__u32 sizeimage;
enum v4l2_colorspace colorspace;
__u32 priv; /* private data, depends on
pixelformat */
};
/* Pixel format FOURCC depth Description */
#define V4L2_PIX_FMT_RGB332 v4l2_fourcc('R','G','B','1') /* 8 RGB-3-3-2 */
#define V4L2_PIX_FMT_RGB555 v4l2_fourcc('R','G','B','O') /* 16 RGB-5-5-5 */
#define V4L2_PIX_FMT_RGB565 v4l2_fourcc('R','G','B','P') /* 16 RGB-5-6-5 */
#define V4L2_PIX_FMT_RGB555X v4l2_fourcc('R','G','B','Q') /* 16 RGB-5-5-5 BE */
#define V4L2_PIX_FMT_RGB565X v4l2_fourcc('R','G','B','R') /* 16 RGB-5-6-5 BE */
#define V4L2_PIX_FMT_BGR24 v4l2_fourcc('B','G','R','3') /* 24 BGR-8-8-8 */
#define V4L2_PIX_FMT_RGB24 v4l2_fourcc('R','G','B','3') /* 24 RGB-8-8-8 */
#define V4L2_PIX_FMT_BGR32 v4l2_fourcc('B','G','R','4') /* 32 BGR-8-8-8-8 */
#define V4L2_PIX_FMT_RGB32 v4l2_fourcc('R','G','B','4') /* 32 RGB-8-8-8-8 */
#define V4L2_PIX_FMT_GREY v4l2_fourcc('G','R','E','Y') /* 8 Greyscale */
#define V4L2_PIX_FMT_YVU410 v4l2_fourcc('Y','V','U','9') /* 9 YVU 4:1:0 */
#define V4L2_PIX_FMT_YVU420 v4l2_fourcc('Y','V','1','2') /* 12 YVU 4:2:0 */
#define V4L2_PIX_FMT_YUYV v4l2_fourcc('Y','U','Y','V') /* 16 YUV 4:2:2 */
#define V4L2_PIX_FMT_UYVY v4l2_fourcc('U','Y','V','Y') /* 16 YUV 4:2:2 */
#define V4L2_PIX_FMT_YUV422P v4l2_fourcc('4','2','2','P') /* 16 YVU422 planar */
#define V4L2_PIX_FMT_YUV411P v4l2_fourcc('4','1','1','P') /* 16 YVU411 planar */
#define V4L2_PIX_FMT_Y41P v4l2_fourcc('Y','4','1','P') /* 12 YUV 4:1:1 */
/* two planes -- one Y, one Cr + Cb interleaved */
#define V4L2_PIX_FMT_NV12 v4l2_fourcc('N','V','1','2') /* 12 Y/CbCr 4:2:0 */
#define V4L2_PIX_FMT_NV21 v4l2_fourcc('N','V','2','1') /* 12 Y/CrCb 4:2:0 */
/* The following formats are not defined in the V4L2 specification */
#define V4L2_PIX_FMT_YUV410 v4l2_fourcc('Y','U','V','9') /* 9 YUV 4:1:0 */
#define V4L2_PIX_FMT_YUV420 v4l2_fourcc('Y','U','1','2') /* 12 YUV 4:2:0 */
#define V4L2_PIX_FMT_YYUV v4l2_fourcc('Y','Y','U','V') /* 16 YUV 4:2:2 */
#define V4L2_PIX_FMT_HI240 v4l2_fourcc('H','I','2','4') /* 8 8-bit color */
/* compressed formats */
#define V4L2_PIX_FMT_MJPEG v4l2_fourcc('M','J','P','G') /* Motion-JPEG */
#define V4L2_PIX_FMT_DV v4l2_fourcc('d','v','s','d') /* digital video */
/* Vendor-specific formats */
#define V4L2_PIX_FMT_WNVA v4l2_fourcc('W','N','V','A') /* Winnov hw compres */
/*
* F O R M A T E N U M E R A T I O N
*/
struct v4l2_fmtdesc
{
__u32 index; /* Format number */
enum v4l2_buf_type type; /* buffer type */
__u8 description[32]; /* Description string */
__u32 pixelformat; /* Format fourcc */
__u32 reserved[4];
};
/*
* T I M E C O D E
*/
struct v4l2_timecode
{
__u32 type;
__u32 flags;
__u8 frames;
__u8 seconds;
__u8 minutes;
__u8 hours;
__u8 userbits[4];
};
/* Type */
#define V4L2_TC_TYPE_24FPS 1
#define V4L2_TC_TYPE_25FPS 2
#define V4L2_TC_TYPE_30FPS 3
#define V4L2_TC_TYPE_50FPS 4
#define V4L2_TC_TYPE_60FPS 5
/* Flags */
#define V4L2_TC_FLAG_DROPFRAME 0x0001 /* "drop-frame" mode */
#define V4L2_TC_FLAG_COLORFRAME 0x0002
#define V4L2_TC_USERBITS_field 0x000C
#define V4L2_TC_USERBITS_USERDEFINED 0x0000
#define V4L2_TC_USERBITS_8BITCHARS 0x0008
/* The above is based on SMPTE timecodes */
/*
* C O M P R E S S I O N P A R A M E T E R S
*/
#if 0
/* ### generic compression settings don't work, there is too much
* ### codec-specific stuff. Maybe reuse that for MPEG codec settings
* ### later ... */
struct v4l2_compression
{
__u32 quality;
__u32 keyframerate;
__u32 pframerate;
__u32 reserved[5];
};
#endif
struct v4l2_jpegcompression
{
int quality;
int APPn; /* Number of APP segment to be written,
* must be 0..15 */
int APP_len; /* Length of data in JPEG APPn segment */
char APP_data[60]; /* Data in the JPEG APPn segment. */
int COM_len; /* Length of data in JPEG COM segment */
char COM_data[60]; /* Data in JPEG COM segment */
__u32 jpeg_markers; /* Which markers should go into the JPEG
* output. Unless you exactly know what
* you do, leave them untouched.
* Inluding less markers will make the
* resulting code smaller, but there will
* be fewer aplications which can read it.
* The presence of the APP and COM marker
* is influenced by APP_len and COM_len
* ONLY, not by this property! */
#define V4L2_JPEG_MARKER_DHT (1<<3) /* Define Huffman Tables */
#define V4L2_JPEG_MARKER_DQT (1<<4) /* Define Quantization Tables */
#define V4L2_JPEG_MARKER_DRI (1<<5) /* Define Restart Interval */
#define V4L2_JPEG_MARKER_COM (1<<6) /* Comment segment */
#define V4L2_JPEG_MARKER_APP (1<<7) /* App segment, driver will
* allways use APP0 */
};
/*
* M E M O R Y - M A P P I N G B U F F E R S
*/
struct v4l2_requestbuffers
{
__u32 count;
enum v4l2_buf_type type;
enum v4l2_memory memory;
__u32 reserved[2];
};
struct v4l2_buffer
{
__u32 index;
enum v4l2_buf_type type;
__u32 bytesused;
__u32 flags;
enum v4l2_field field;
struct timeval timestamp;
struct v4l2_timecode timecode;
__u32 sequence;
/* memory location */
enum v4l2_memory memory;
union {
off_t offset;
void* userptr;
} m;
__u32 length;
__u32 reserved[2];
};
/* Flags for 'flags' field */
#define V4L2_BUF_FLAG_MAPPED 0x0001 /* Buffer is mapped (flag) */
#define V4L2_BUF_FLAG_QUEUED 0x0002 /* Buffer is queued for processing */
#define V4L2_BUF_FLAG_DONE 0x0004 /* Buffer is ready */
#define V4L2_BUF_FLAG_KEYFRAME 0x0008 /* Image is a keyframe (I-frame) */
#define V4L2_BUF_FLAG_PFRAME 0x0010 /* Image is a P-frame */
#define V4L2_BUF_FLAG_BFRAME 0x0020 /* Image is a B-frame */
#define V4L2_BUF_FLAG_TIMECODE 0x0100 /* timecode field is valid */
/*
* O V E R L A Y P R E V I E W
*/
struct v4l2_framebuffer
{
__u32 capability;
__u32 flags;
/* FIXME: in theory we should pass something like PCI device + memory
* region + offset instead of some physical address */
void* base;
struct v4l2_pix_format fmt;
};
/* Flags for the 'capability' field. Read only */
#define V4L2_FBUF_CAP_EXTERNOVERLAY 0x0001
#define V4L2_FBUF_CAP_CHROMAKEY 0x0002
#define V4L2_FBUF_CAP_LIST_CLIPPING 0x0004
#define V4L2_FBUF_CAP_BITMAP_CLIPPING 0x0008
/* Flags for the 'flags' field. */
#define V4L2_FBUF_FLAG_PRIMARY 0x0001
#define V4L2_FBUF_FLAG_OVERLAY 0x0002
#define V4L2_FBUF_FLAG_CHROMAKEY 0x0004
struct v4l2_clip
{
struct v4l2_rect c;
struct v4l2_clip *next;
};
struct v4l2_window
{
struct v4l2_rect w;
__u32 chromakey;
struct v4l2_clip *clips;
__u32 clipcount;
void *bitmap;
};
/*
* C A P T U R E P A R A M E T E R S
*/
struct v4l2_captureparm
{
__u32 capability; /* Supported modes */
__u32 capturemode; /* Current mode */
struct v4l2_fract timeperframe; /* Time per frame in .1us units */
__u32 extendedmode; /* Driver-specific extensions */
__u32 readbuffers; /* # of buffers for read */
__u32 reserved[4];
};
/* Flags for 'capability' and 'capturemode' fields */
#define V4L2_MODE_HIGHQUALITY 0x0001 /* High quality imaging mode */
#define V4L2_CAP_TIMEPERFRAME 0x1000 /* timeperframe field is supported */
struct v4l2_outputparm
{
__u32 capability; /* Supported modes */
__u32 outputmode; /* Current mode */
struct v4l2_fract timeperframe; /* Time per frame in seconds */
__u32 extendedmode; /* Driver-specific extensions */
__u32 writebuffers; /* # of buffers for write */
__u32 reserved[4];
};
/*
* I N P U T I M A G E C R O P P I N G
*/
struct v4l2_cropcap {
enum v4l2_buf_type type;
struct v4l2_rect bounds;
struct v4l2_rect defrect;
struct v4l2_fract pixelaspect;
};
struct v4l2_crop {
enum v4l2_buf_type type;
struct v4l2_rect c;
};
/*
* A N A L O G V I D E O S T A N D A R D
*/
/* one bit for each */
#define V4L2_STD_PAL_B 0x00000001
#define V4L2_STD_PAL_B1 0x00000002
#define V4L2_STD_PAL_G 0x00000004
#define V4L2_STD_PAL_H 0x00000008
#define V4L2_STD_PAL_I 0x00000010
#define V4L2_STD_PAL_D 0x00000020
#define V4L2_STD_PAL_D1 0x00000040
#define V4L2_STD_PAL_K 0x00000080
#define V4L2_STD_PAL_M 0x00000100
#define V4L2_STD_PAL_N 0x00000200
#define V4L2_STD_PAL_Nc 0x00000400
#define V4L2_STD_PAL_60 0x00000800
#define V4L2_STD_NTSC_M 0x00001000
#define V4L2_STD_NTSC_M_JP 0x00002000
#define V4L2_STD_SECAM_B 0x00010000
#define V4L2_STD_SECAM_D 0x00020000
#define V4L2_STD_SECAM_G 0x00040000
#define V4L2_STD_SECAM_H 0x00080000
#define V4L2_STD_SECAM_K 0x00100000
#define V4L2_STD_SECAM_K1 0x00200000
#define V4L2_STD_SECAM_L 0x00400000
/* some common needed stuff */
#define V4L2_STD_PAL_BG (V4L2_STD_PAL_B |\
V4L2_STD_PAL_B1 |\
V4L2_STD_PAL_G)
#define V4L2_STD_PAL_DK (V4L2_STD_PAL_D |\
V4L2_STD_PAL_D1 |\
V4L2_STD_PAL_K)
#define V4L2_STD_PAL (V4L2_STD_PAL_BG |\
V4L2_STD_PAL_DK |\
V4L2_STD_PAL_H |\
V4L2_STD_PAL_I)
#define V4L2_STD_NTSC (V4L2_STD_NTSC_M |\
V4L2_STD_NTSC_M_JP)
#define V4L2_STD_SECAM (V4L2_STD_SECAM_B |\
V4L2_STD_SECAM_D |\
V4L2_STD_SECAM_G |\
V4L2_STD_SECAM_H |\
V4L2_STD_SECAM_K |\
V4L2_STD_SECAM_K1 |\
V4L2_STD_SECAM_L)
#define V4L2_STD_525_60 (V4L2_STD_PAL_M |\
V4L2_STD_PAL_60 |\
V4L2_STD_NTSC)
#define V4L2_STD_625_50 (V4L2_STD_PAL |\
V4L2_STD_PAL_N |\
V4L2_STD_PAL_Nc |\
V4L2_STD_SECAM)
#define V4L2_STD_UNKNOWN 0
#define V4L2_STD_ALL (V4L2_STD_525_60 |\
V4L2_STD_625_50)
typedef __u64 v4l2_std_id;
struct v4l2_standard
{
v4l2_std_id id;
__u8 name[24];
struct v4l2_fract frameperiod; /* Frames, not fields */
__u32 framelines;
};
/* Used in the VIDIOC_ENUMSTD ioctl for querying supported standards */
struct v4l2_enumstd
{
__u32 index;
struct v4l2_standard std;
__u32 inputset; /* set of inputs that */
/* support this standard */
__u32 outputset; /* set of outputs that */
/* support this standard */
__u32 reserved[2];
};
/*
* V I D E O I N P U T S
*/
struct v4l2_input
{
__u32 index; /* Which input */
__u8 name[32]; /* Label */
__u32 type; /* Type of input */
__u32 audioset; /* Associated audios (bitfield) */
__u32 tuner; /* Associated tuner */
__u32 signal; /* has input signal */
__u32 reserved[4];
};
/* Values for the 'type' field */
#define V4L2_INPUT_TYPE_TUNER 1
#define V4L2_INPUT_TYPE_CAMERA 2
/*
* V I D E O O U T P U T S
*/
struct v4l2_output
{
__u32 index; /* Which output */
__u8 name[32]; /* Label */
__u32 type; /* Type of output */
__u32 audioset; /* Associated audios (bitfield) */
__u32 modulator; /* Associated modulator */
__u32 reserved[4];
};
/* Values for the 'type' field */
#define V4L2_OUTPUT_TYPE_MODULATOR 1
#define V4L2_OUTPUT_TYPE_ANALOG 2
#define V4L2_OUTPUT_TYPE_ANALOGVGAOVERLAY 3
/*
* C O N T R O L S
*/
struct v4l2_control
{
__u32 id;
__s32 value;
};
/* Used in the VIDIOC_QUERYCTRL ioctl for querying controls */
struct v4l2_queryctrl
{
__u32 id;
enum v4l2_ctrl_type type;
__u8 name[32]; /* Whatever */
__s32 minimum; /* Note signedness */
__s32 maximum;
__s32 step;
__s32 default_value;
__u32 flags;
__u32 reserved[2];
};
/* Used in the VIDIOC_QUERYMENU ioctl for querying menu items */
struct v4l2_querymenu
{
__u32 id;
__u32 index;
__u8 name[32]; /* Whatever */
__u32 reserved;
};
/* Control flags */
#define V4L2_CTRL_FLAG_DISABLED 0x0001
#define V4L2_CTRL_FLAG_GRABBED 0x0002
/* Control IDs defined by V4L2 */
#define V4L2_CID_BASE 0x00980900
/* IDs reserved for driver specific controls */
#define V4L2_CID_PRIVATE_BASE 0x08000000
#define V4L2_CID_BRIGHTNESS (V4L2_CID_BASE+0)
#define V4L2_CID_CONTRAST (V4L2_CID_BASE+1)
#define V4L2_CID_SATURATION (V4L2_CID_BASE+2)
#define V4L2_CID_HUE (V4L2_CID_BASE+3)
#define V4L2_CID_AUDIO_VOLUME (V4L2_CID_BASE+5)
#define V4L2_CID_AUDIO_BALANCE (V4L2_CID_BASE+6)
#define V4L2_CID_AUDIO_BASS (V4L2_CID_BASE+7)
#define V4L2_CID_AUDIO_TREBLE (V4L2_CID_BASE+8)
#define V4L2_CID_AUDIO_MUTE (V4L2_CID_BASE+9)
#define V4L2_CID_AUDIO_LOUDNESS (V4L2_CID_BASE+10)
#define V4L2_CID_BLACK_LEVEL (V4L2_CID_BASE+11)
#define V4L2_CID_AUTO_WHITE_BALANCE (V4L2_CID_BASE+12)
#define V4L2_CID_DO_WHITE_BALANCE (V4L2_CID_BASE+13)
#define V4L2_CID_RED_BALANCE (V4L2_CID_BASE+14)
#define V4L2_CID_BLUE_BALANCE (V4L2_CID_BASE+15)
#define V4L2_CID_GAMMA (V4L2_CID_BASE+16)
#define V4L2_CID_WHITENESS (V4L2_CID_GAMMA) /* ? Not sure */
#define V4L2_CID_EXPOSURE (V4L2_CID_BASE+17)
#define V4L2_CID_AUTOGAIN (V4L2_CID_BASE+18)
#define V4L2_CID_GAIN (V4L2_CID_BASE+19)
#define V4L2_CID_HFLIP (V4L2_CID_BASE+20)
#define V4L2_CID_VFLIP (V4L2_CID_BASE+21)
#define V4L2_CID_HCENTER (V4L2_CID_BASE+22)
#define V4L2_CID_VCENTER (V4L2_CID_BASE+23)
#define V4L2_CID_LASTP1 (V4L2_CID_BASE+24) /* last CID + 1 */
/*
* T U N I N G
*/
struct v4l2_tuner
{
__u32 tuner;
__u8 name[32];
__u32 capability;
__u32 rangelow;
__u32 rangehigh;
__u32 rxsubchans;
__u32 audmode;
__u32 signal;
__u32 afc;
__u32 reserved[4];
};
struct v4l2_modulator
{
__u32 output;
__u8 name[32];
__u32 capability;
__u32 rangelow;
__u32 rangehigh;
__u32 txsubchans;
__u32 reserved[4];
};
/* Flags for the 'capability' field */
#define V4L2_TUNER_CAP_LOW 0x0001
#define V4L2_TUNER_CAP_NORM 0x0002
#define V4L2_TUNER_CAP_STEREO 0x0010
#define V4L2_TUNER_CAP_LANG2 0x0020
#define V4L2_TUNER_CAP_SAP 0x0020
#define V4L2_TUNER_CAP_LANG1 0x0040
/* Flags for the 'rxsubchans' field */
#define V4L2_TUNER_SUB_MONO 0x0001
#define V4L2_TUNER_SUB_STEREO 0x0002
#define V4L2_TUNER_SUB_LANG2 0x0004
#define V4L2_TUNER_SUB_SAP 0x0004
#define V4L2_TUNER_SUB_LANG1 0x0008
/* Values for the 'audmode' field */
#define V4L2_TUNER_MODE_MONO 0x0000
#define V4L2_TUNER_MODE_STEREO 0x0001
#define V4L2_TUNER_MODE_LANG2 0x0002
#define V4L2_TUNER_MODE_SAP 0x0002
#define V4L2_TUNER_MODE_LANG1 0x0003
struct v4l2_frequency
{
__u32 tuner;
/* ### FIXME #1: add mode flag here? tv vs. radio, ... */
/* ### FIXME #2: add stuff for analog SAT here ? */
__u32 frequency;
__u32 reserved[2];
};
/*
* A U D I O
*/
struct v4l2_audio
{
__u32 audio;
__u8 name[32];
__u32 capability;
__u32 mode;
__u32 reserved[2];
};
/* Flags for the 'capability' field */
#define V4L2_AUDCAP_EFFECTS 0x0020
#define V4L2_AUDCAP_LOUDNESS 0x0040
#define V4L2_AUDCAP_AVL 0x0080
/* Flags for the 'mode' field */
#define V4L2_AUDMODE_LOUDNESS 0x00002
#define V4L2_AUDMODE_AVL 0x00004
#define V4L2_AUDMODE_STEREO_field 0x0FF00
#define V4L2_AUDMODE_STEREO_LINEAR 0x00100
#define V4L2_AUDMODE_STEREO_PSEUDO 0x00200
#define V4L2_AUDMODE_STEREO_SPATIAL30 0x00300
#define V4L2_AUDMODE_STEREO_SPATIAL50 0x00400
struct v4l2_audioout
{
__u32 audio;
__u8 name[32];
__u32 capability;
__u32 mode;
__u32 reserved[2];
};
/*
* D A T A S E R V I C E S ( V B I )
*
* Data services API by Michael Schimek
*/
struct v4l2_vbi_format
{
__u32 sampling_rate; /* in 1 Hz */
__u32 offset;
__u32 samples_per_line;
__u32 sample_format; /* V4L2_VBI_SF_* */
__s32 start[2];
__u32 count[2];
__u32 flags; /* V4L2_VBI_* */
__u32 reserved[2]; /* must be zero */
};
/* VBI flags */
#define V4L2_VBI_UNSYNC (1<< 0)
#define V4L2_VBI_INTERLACED (1<< 1)
/*
* A G G R E G A T E S T R U C T U R E S
*/
/* Stream data format
*/
struct v4l2_format
{
enum v4l2_buf_type type;
union
{
struct v4l2_pix_format pix; // V4L2_BUF_TYPE_VIDEO_CAPTURE
struct v4l2_window win; // V4L2_BUF_TYPE_VIDEO_OVERLAY
struct v4l2_vbi_format vbi; // V4L2_BUF_TYPE_VBI_CAPTURE
__u8 raw_data[200]; // user-defined
} fmt;
};
/* Stream type-dependent parameters
*/
struct v4l2_streamparm
{
enum v4l2_buf_type type;
union
{
struct v4l2_captureparm capture;
struct v4l2_outputparm output;
__u8 raw_data[200]; /* user-defined */
} parm;
};
/*
* I O C T L C O D E S F O R V I D E O D E V I C E S
*
*/
#define VIDIOC_QUERYCAP _IOR ('V', 0, struct v4l2_capability)
#define VIDIOC_RESERVED _IO ('V', 1)
#define VIDIOC_ENUM_FMT _IOWR ('V', 2, struct v4l2_fmtdesc)
#define VIDIOC_G_FMT _IOWR ('V', 4, struct v4l2_format)
#define VIDIOC_S_FMT _IOWR ('V', 5, struct v4l2_format)
#define VIDIOC_G_COMP _IOR ('V', 6, struct v4l2_compression)
#define VIDIOC_S_COMP _IOW ('V', 7, struct v4l2_compression)
#define VIDIOC_REQBUFS _IOWR ('V', 8, struct v4l2_requestbuffers)
#define VIDIOC_QUERYBUF _IOWR ('V', 9, struct v4l2_buffer)
#define VIDIOC_G_FBUF _IOR ('V', 10, struct v4l2_framebuffer)
#define VIDIOC_S_FBUF _IOW ('V', 11, struct v4l2_framebuffer)
#define VIDIOC_OVERLAY _IOWR ('V', 14, int)
#define VIDIOC_QBUF _IOWR ('V', 15, struct v4l2_buffer)
#define VIDIOC_DQBUF _IOWR ('V', 17, struct v4l2_buffer)
#define VIDIOC_STREAMON _IOW ('V', 18, int)
#define VIDIOC_STREAMOFF _IOW ('V', 19, int)
#define VIDIOC_G_PARM _IOWR ('V', 21, struct v4l2_streamparm)
#define VIDIOC_S_PARM _IOW ('V', 22, struct v4l2_streamparm)
#define VIDIOC_G_STD _IOR ('V', 23, v4l2_std_id)
#define VIDIOC_S_STD _IOW ('V', 24, v4l2_std_id)
#define VIDIOC_ENUMSTD _IOWR ('V', 25, struct v4l2_enumstd)
#define VIDIOC_ENUMINPUT _IOWR ('V', 26, struct v4l2_input)
#define VIDIOC_G_CTRL _IOWR ('V', 27, struct v4l2_control)
#define VIDIOC_S_CTRL _IOW ('V', 28, struct v4l2_control)
#define VIDIOC_G_TUNER _IOWR ('V', 29, struct v4l2_tuner)
#define VIDIOC_S_TUNER _IOW ('V', 30, struct v4l2_tuner)
#define VIDIOC_G_AUDIO _IOWR ('V', 33, struct v4l2_audio)
#define VIDIOC_S_AUDIO _IOW ('V', 34, struct v4l2_audio)
#define VIDIOC_QUERYCTRL _IOWR ('V', 36, struct v4l2_queryctrl)
#define VIDIOC_QUERYMENU _IOWR ('V', 37, struct v4l2_querymenu)
#define VIDIOC_G_INPUT _IOR ('V', 38, int)
#define VIDIOC_S_INPUT _IOWR ('V', 39, int)
#define VIDIOC_G_OUTPUT _IOR ('V', 46, int)
#define VIDIOC_S_OUTPUT _IOWR ('V', 47, int)
#define VIDIOC_ENUMOUTPUT _IOWR ('V', 48, struct v4l2_output)
#define VIDIOC_G_AUDOUT _IOWR ('V', 49, struct v4l2_audioout)
#define VIDIOC_S_AUDOUT _IOW ('V', 50, struct v4l2_audioout)
#define VIDIOC_G_MODULATOR _IOWR ('V', 54, struct v4l2_modulator)
#define VIDIOC_S_MODULATOR _IOW ('V', 55, struct v4l2_modulator)
#define VIDIOC_G_FREQUENCY _IOWR ('V', 56, struct v4l2_frequency)
#define VIDIOC_S_FREQUENCY _IOW ('V', 57, struct v4l2_frequency)
#define VIDIOC_CROPCAP _IOR ('V', 58, struct v4l2_cropcap)
#define VIDIOC_G_CROP _IOR ('V', 59, struct v4l2_crop)
#define VIDIOC_S_CROP _IOW ('V', 60, struct v4l2_crop)
#define VIDIOC_G_JPEGCOMP _IOR ('V', 61, struct v4l2_jpegcompression)
#define VIDIOC_S_JPEGCOMP _IOW ('V', 62, struct v4l2_jpegcompression)
#define VIDIOC_QUERYSTD _IOW ('V', 63, v4l2_std_id)
#define VIDIOC_TRY_FMT _IOW ('V', 63, struct v4l2_format)
#define BASE_VIDIOC_PRIVATE 192 /* 192-255 are private */
#ifdef __KERNEL__
/*
*
* V 4 L 2 D R I V E R H E L P E R A P I
*
* Some commonly needed functions for drivers (v4l2-common.o module)
*/
#include <linux/fs.h>
/* Video standard functions */
extern unsigned int v4l2_video_std_fps(struct v4l2_standard *vs);
extern unsigned long v4l2_video_std_tpf(struct v4l2_standard *vs);
extern int v4l2_video_std_construct(struct v4l2_standard *vs, int id);
/* Compatibility layer interface */
typedef int (*v4l2_kioctl)(struct inode *inode, struct file *file,
unsigned int cmd, void *arg);
int v4l_compat_translate_ioctl(struct inode *inode, struct file *file,
int cmd, void *arg, v4l2_kioctl driver_ioctl);
/* names for fancy debug output */
extern char *v4l2_field_names[];
extern char *v4l2_type_names[];
#endif /* __KERNEL__ */
#endif /* __LINUX_VIDEODEV2_H */
/*
* Local variables:
* c-basic-offset: 8
* End:
*/
_______________________________________________
Video4linux-list mailing list
[EMAIL PROTECTED]
https://listman.redhat.com/mailman/listinfo/video4linux-list
