/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
v4l2 common internal API header
This header contains internal shared ioctl definitions for use by the
internal low - level v4l2 drivers .
Each ioctl begins with VIDIOC_INT_ to clearly mark that it is an internal
define ,
Copyright ( C ) 2005 Hans Verkuil < hverkuil @ xs4all . nl >
*/
#ifndef V4L2_COMMON_H_
#define V4L2_COMMON_H_
#include <linux/time.h>
#include <media/v4l2-dev.h>
/* Common printk constructs for v4l-i2c drivers. These macros create a unique
prefix consisting of the driver name , the adapter number and the i2c
address. */
#define v4l_printk(level, name, adapter, addr, fmt, arg...) \
printk(level "%s %d-%04x: " fmt, name, i2c_adapter_id(adapter), addr , ## arg)
#define v4l_client_printk(level, client, fmt, arg...) \
v4l_printk(level, (client)->dev.driver->name, (client)->adapter, \
(client)->addr, fmt , ## arg)
#define v4l_err(client, fmt, arg...) \
v4l_client_printk(KERN_ERR, client, fmt , ## arg)
#define v4l_warn(client, fmt, arg...) \
v4l_client_printk(KERN_WARNING, client, fmt , ## arg)
#define v4l_info(client, fmt, arg...) \
v4l_client_printk(KERN_INFO, client, fmt , ## arg)
/* These three macros assume that the debug level is set with a module
parameter called 'debug'. */
#define v4l_dbg(level, debug, client, fmt, arg...) \
do { \
if (debug >= (level)) \
v4l_client_printk(KERN_DEBUG, client, fmt , ## arg); \
} while (0 )
/* Add a version of v4l_dbg to be used on drivers using dev_foo() macros */
#define dev_dbg_lvl(__dev, __level, __debug, __fmt, __arg...) \
do { \
if (__debug >= (__level)) \
dev_printk(KERN_DEBUG, __dev, __fmt, ## __arg); \
} while (0 )
/* ------------------------------------------------------------------------- */
/* These printk constructs can be used with v4l2_device and v4l2_subdev */
#define v4l2_printk(level, dev, fmt, arg...) \
printk(level "%s: " fmt, (dev)->name , ## arg)
#define v4l2_err(dev, fmt, arg...) \
v4l2_printk(KERN_ERR, dev, fmt , ## arg)
#define v4l2_warn(dev, fmt, arg...) \
v4l2_printk(KERN_WARNING, dev, fmt , ## arg)
#define v4l2_info(dev, fmt, arg...) \
v4l2_printk(KERN_INFO, dev, fmt , ## arg)
/* These three macros assume that the debug level is set with a module
parameter called 'debug'. */
#define v4l2_dbg(level, debug, dev, fmt, arg...) \
do { \
if (debug >= (level)) \
v4l2_printk(KERN_DEBUG, dev, fmt , ## arg); \
} while (0 )
/**
* v4l2_ctrl_query_fill - Fill in a struct v4l2_queryctrl
*
* @ qctrl : pointer to the & struct v4l2_queryctrl to be filled
* @ min : minimum value for the control
* @ max : maximum value for the control
* @ step : control step
* @ def : default value for the control
*
* Fills the & struct v4l2_queryctrl fields for the query control .
*
* . . note : :
*
* This function assumes that the @ qctrl - > id field is filled .
*
* Returns - EINVAL if the control is not known by the V4L2 core , 0 on success .
*/
int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl,
s32 min, s32 max, s32 step, s32 def);
/* ------------------------------------------------------------------------- */
struct v4l2_device;
struct v4l2_subdev;
struct v4l2_subdev_ops;
/* I2C Helper functions */
#include <linux/i2c.h>
/**
* enum v4l2_i2c_tuner_type - specifies the range of tuner address that
* should be used when seeking for I2C devices .
*
* @ ADDRS_RADIO : Radio tuner addresses .
* Represent the following I2C addresses :
* 0 x10 ( if compiled with tea5761 support )
* and 0 x60 .
* @ ADDRS_DEMOD : Demod tuner addresses .
* Represent the following I2C addresses :
* 0 x42 , 0 x43 , 0 x4a and 0 x4b .
* @ ADDRS_TV : TV tuner addresses .
* Represent the following I2C addresses :
* 0 x42 , 0 x43 , 0 x4a , 0 x4b , 0 x60 , 0 x61 , 0 x62 ,
* 0 x63 and 0 x64 .
* @ ADDRS_TV_WITH_DEMOD : TV tuner addresses if demod is present , this
* excludes addresses used by the demodulator
* from the list of candidates .
* Represent the following I2C addresses :
* 0 x60 , 0 x61 , 0 x62 , 0 x63 and 0 x64 .
*
* NOTE : All I2C addresses above use the 7 - bit notation .
*/
enum v4l2_i2c_tuner_type {
ADDRS_RADIO,
ADDRS_DEMOD,
ADDRS_TV,
ADDRS_TV_WITH_DEMOD,
};
#if defined (CONFIG_VIDEO_V4L2_I2C)
/**
* v4l2_i2c_new_subdev - Load an i2c module and return an initialized
* & struct v4l2_subdev .
*
* @ v4l2_dev : pointer to & struct v4l2_device
* @ adapter : pointer to struct i2c_adapter
* @ client_type : name of the chip that ' s on the adapter .
* @ addr : I2C address . If zero , it will use @ probe_addrs
* @ probe_addrs : array with a list of address . The last entry at such
* array should be % I2C_CLIENT_END .
*
* returns a & struct v4l2_subdev pointer .
*/
struct v4l2_subdev *v4l2_i2c_new_subdev(struct v4l2_device *v4l2_dev,
struct i2c_adapter *adapter, const char *client_type,
u8 addr, const unsigned short *probe_addrs);
/**
* v4l2_i2c_new_subdev_board - Load an i2c module and return an initialized
* & struct v4l2_subdev .
*
* @ v4l2_dev : pointer to & struct v4l2_device
* @ adapter : pointer to struct i2c_adapter
* @ info : pointer to struct i2c_board_info used to replace the irq ,
* platform_data and addr arguments .
* @ probe_addrs : array with a list of address . The last entry at such
* array should be % I2C_CLIENT_END .
*
* returns a & struct v4l2_subdev pointer .
*/
struct v4l2_subdev *v4l2_i2c_new_subdev_board(struct v4l2_device *v4l2_dev,
struct i2c_adapter *adapter, struct i2c_board_info *info,
const unsigned short *probe_addrs);
/**
* v4l2_i2c_subdev_set_name - Set name for an I ² C sub - device
*
* @ sd : pointer to & struct v4l2_subdev
* @ client : pointer to struct i2c_client
* @ devname : the name of the device ; if NULL , the I ² C device drivers ' s name
* will be used
* @ postfix : sub - device specific string to put right after the I ² C device name ;
* may be NULL
*/
void v4l2_i2c_subdev_set_name(struct v4l2_subdev *sd, struct i2c_client *client,
const char *devname, const char *postfix);
/**
* v4l2_i2c_subdev_init - Initializes a & struct v4l2_subdev with data from
* an i2c_client struct .
*
* @ sd : pointer to & struct v4l2_subdev
* @ client : pointer to struct i2c_client
* @ ops : pointer to & struct v4l2_subdev_ops
*/
void v4l2_i2c_subdev_init(struct v4l2_subdev *sd, struct i2c_client *client,
const struct v4l2_subdev_ops *ops);
/**
* v4l2_i2c_subdev_addr - returns i2c client address of & struct v4l2_subdev .
*
* @ sd : pointer to & struct v4l2_subdev
*
* Returns the address of an I2C sub - device
*/
unsigned short v4l2_i2c_subdev_addr(struct v4l2_subdev *sd);
/**
* v4l2_i2c_tuner_addrs - Return a list of I2C tuner addresses to probe .
*
* @ type : type of the tuner to seek , as defined by
* & enum v4l2_i2c_tuner_type .
*
* NOTE : Use only if the tuner addresses are unknown .
*/
const unsigned short *v4l2_i2c_tuner_addrs(enum v4l2_i2c_tuner_type type);
/**
* v4l2_i2c_subdev_unregister - Unregister a v4l2_subdev
*
* @ sd : pointer to & struct v4l2_subdev
*/
void v4l2_i2c_subdev_unregister(struct v4l2_subdev *sd);
#else
static inline struct v4l2_subdev *
v4l2_i2c_new_subdev(struct v4l2_device *v4l2_dev,
struct i2c_adapter *adapter, const char *client_type,
u8 addr, const unsigned short *probe_addrs)
{
return NULL;
}
static inline struct v4l2_subdev *
v4l2_i2c_new_subdev_board(struct v4l2_device *v4l2_dev,
struct i2c_adapter *adapter, struct i2c_board_info *info,
const unsigned short *probe_addrs)
{
return NULL;
}
static inline void
v4l2_i2c_subdev_set_name(struct v4l2_subdev *sd, struct i2c_client *client,
const char *devname, const char *postfix)
{}
static inline void
v4l2_i2c_subdev_init(struct v4l2_subdev *sd, struct i2c_client *client,
const struct v4l2_subdev_ops *ops)
{}
static inline unsigned short v4l2_i2c_subdev_addr(struct v4l2_subdev *sd)
{
return I2C_CLIENT_END;
}
static inline const unsigned short *
v4l2_i2c_tuner_addrs(enum v4l2_i2c_tuner_type type)
{
return NULL;
}
static inline void v4l2_i2c_subdev_unregister(struct v4l2_subdev *sd)
{}
#endif
/* ------------------------------------------------------------------------- */
/* SPI Helper functions */
#include <linux/spi/spi.h>
#if defined (CONFIG_SPI)
/**
* v4l2_spi_new_subdev - Load an spi module and return an initialized
* & struct v4l2_subdev .
*
*
* @ v4l2_dev : pointer to & struct v4l2_device .
* @ ctlr : pointer to struct spi_controller .
* @ info : pointer to struct spi_board_info .
*
* returns a & struct v4l2_subdev pointer .
*/
struct v4l2_subdev *v4l2_spi_new_subdev(struct v4l2_device *v4l2_dev,
struct spi_controller *ctlr, struct spi_board_info *info);
/**
* v4l2_spi_subdev_init - Initialize a v4l2_subdev with data from an
* spi_device struct .
*
* @ sd : pointer to & struct v4l2_subdev
* @ spi : pointer to struct spi_device .
* @ ops : pointer to & struct v4l2_subdev_ops
*/
void v4l2_spi_subdev_init(struct v4l2_subdev *sd, struct spi_device *spi,
const struct v4l2_subdev_ops *ops);
/**
* v4l2_spi_subdev_unregister - Unregister a v4l2_subdev
*
* @ sd : pointer to & struct v4l2_subdev
*/
void v4l2_spi_subdev_unregister(struct v4l2_subdev *sd);
#else
static inline struct v4l2_subdev *
v4l2_spi_new_subdev(struct v4l2_device *v4l2_dev,
struct spi_controller *ctlr, struct spi_board_info *info)
{
return NULL;
}
static inline void
v4l2_spi_subdev_init(struct v4l2_subdev *sd, struct spi_device *spi,
const struct v4l2_subdev_ops *ops)
{}
static inline void v4l2_spi_subdev_unregister(struct v4l2_subdev *sd)
{}
#endif
/* ------------------------------------------------------------------------- */
/*
* FIXME : these remaining ioctls / structs should be removed as well , but they
* are still used in tuner - simple . c ( TUNER_SET_CONFIG ) and cx18 / ivtv ( RESET ) .
* To remove these ioctls some more cleanup is needed in those modules .
*
* It doesn ' t make much sense on documenting them , as what we really want is
* to get rid of them .
*/
/* s_config */
struct v4l2_priv_tun_config {
int tuner;
void *priv;
};
#define TUNER_SET_CONFIG _IOW('d' , 92 , struct v4l2_priv_tun_config)
#define VIDIOC_INT_RESET _IOW ('d' , 102 , u32)
/* ------------------------------------------------------------------------- */
/* Miscellaneous helper functions */
/**
* v4l_bound_align_image - adjust video dimensions according to
* a given constraints .
*
* @ width : pointer to width that will be adjusted if needed .
* @ wmin : minimum width .
* @ wmax : maximum width .
* @ walign : least significant bit on width .
* @ height : pointer to height that will be adjusted if needed .
* @ hmin : minimum height .
* @ hmax : maximum height .
* @ halign : least significant bit on height .
* @ salign : least significant bit for the image size ( e . g .
* : math : ` width * height ` ) .
*
* Clip an image to have @ width between @ wmin and @ wmax , and @ height between
* @ hmin and @ hmax , inclusive .
*
* Additionally , the @ width will be a multiple of : math : ` 2 ^ { walign } ` ,
* the @ height will be a multiple of : math : ` 2 ^ { halign } ` , and the overall
* size : math : ` width * height ` will be a multiple of : math : ` 2 ^ { salign } ` .
*
* . . note : :
*
* # . The clipping rectangle may be shrunk or enlarged to fit the alignment
* constraints .
* # . @ wmax must not be smaller than @ wmin .
* # . @ hmax must not be smaller than @ hmin .
* # . The alignments must not be so high there are no possible image
* sizes within the allowed bounds .
* # . @ wmin and @ hmin must be at least 1 ( don ' t use 0 ) .
* # . For @ walign , @ halign and @ salign , if you don ' t care about a certain
* alignment , specify ` ` 0 ` ` , as : math : ` 2 ^ 0 = 1 ` and one byte alignment
* is equivalent to no alignment .
* # . If you only want to adjust downward , specify a maximum that ' s the
* same as the initial value .
*/
void v4l_bound_align_image(unsigned int *width, unsigned int wmin,
unsigned int wmax, unsigned int walign,
unsigned int *height, unsigned int hmin,
unsigned int hmax, unsigned int halign,
unsigned int salign);
/**
* v4l2_find_nearest_size_conditional - Find the nearest size among a discrete
* set of resolutions contained in an array of a driver specific struct ,
* with conditionally exlusion of certain modes
*
* @ array : a driver specific array of image sizes
* @ array_size : the length of the driver specific array of image sizes
* @ width_field : the name of the width field in the driver specific struct
* @ height_field : the name of the height field in the driver specific struct
* @ width : desired width
* @ height : desired height
* @ func : ignores mode if returns false
* @ context : context for the function
*
* Finds the closest resolution to minimize the width and height differences
* between what requested and the supported resolutions . The size of the width
* and height fields in the driver specific must equal to that of u32 , i . e . four
* bytes . @ func is called for each mode considered , a mode is ignored if @ func
* returns false for it .
*
* Returns the best match or NULL if the length of the array is zero .
*/
#define v4l2_find_nearest_size_conditional(array, array_size, width_field, \
height_field, width, height, \
func, context) \
({ \
BUILD_BUG_ON(sizeof ((array)->width_field) != sizeof (u32) || \
sizeof ((array)->height_field) != sizeof (u32)); \
(typeof(&(array)[0 ]))__v4l2_find_nearest_size_conditional( \
(array), array_size, sizeof (*(array)), \
offsetof(typeof(*(array)), width_field), \
offsetof(typeof(*(array)), height_field), \
width, height, func, context); \
})
const void *
__v4l2_find_nearest_size_conditional(const void *array, size_t array_size,
size_t entry_size, size_t width_offset,
size_t height_offset, s32 width,
s32 height,
bool (*func)(const void *array,
size_t index,
const void *context),
const void *context);
/**
* v4l2_find_nearest_size - Find the nearest size among a discrete set of
* resolutions contained in an array of a driver specific struct
*
* @ array : a driver specific array of image sizes
* @ array_size : the length of the driver specific array of image sizes
* @ width_field : the name of the width field in the driver specific struct
* @ height_field : the name of the height field in the driver specific struct
* @ width : desired width
* @ height : desired height
*
* Finds the closest resolution to minimize the width and height differences
* between what requested and the supported resolutions . The size of the width
* and height fields in the driver specific must equal to that of u32 , i . e . four
* bytes .
*
* Returns the best match or NULL if the length of the array is zero .
*/
#define v4l2_find_nearest_size(array, array_size, width_field, \
height_field, width, height) \
v4l2_find_nearest_size_conditional(array, array_size, width_field, \
height_field, width, height, NULL, \
NULL)
/**
* v4l2_g_parm_cap - helper routine for vidioc_g_parm to fill this in by
* calling the get_frame_interval op of the given subdev . It only works
* for V4L2_BUF_TYPE_VIDEO_CAPTURE ( _ MPLANE ) , hence the _ cap in the
* function name .
*
* @ vdev : the struct video_device pointer . Used to determine the device caps .
* @ sd : the sub - device pointer .
* @ a : the VIDIOC_G_PARM argument .
*/
int v4l2_g_parm_cap(struct video_device *vdev,
struct v4l2_subdev *sd, struct v4l2_streamparm *a);
/**
* v4l2_s_parm_cap - helper routine for vidioc_s_parm to fill this in by
* calling the set_frame_interval op of the given subdev . It only works
* for V4L2_BUF_TYPE_VIDEO_CAPTURE ( _ MPLANE ) , hence the _ cap in the
* function name .
*
* @ vdev : the struct video_device pointer . Used to determine the device caps .
* @ sd : the sub - device pointer .
* @ a : the VIDIOC_S_PARM argument .
*/
int v4l2_s_parm_cap(struct video_device *vdev,
struct v4l2_subdev *sd, struct v4l2_streamparm *a);
/* Compare two v4l2_fract structs */
#define V4L2_FRACT_COMPARE(a, OP, b) \
((u64)(a).numerator * (b).denominator OP \
(u64)(b).numerator * (a).denominator)
/* ------------------------------------------------------------------------- */
/* Pixel format and FourCC helpers */
/**
* enum v4l2_pixel_encoding - specifies the pixel encoding value
*
* @ V4L2_PIXEL_ENC_UNKNOWN : Pixel encoding is unknown / un - initialized
* @ V4L2_PIXEL_ENC_YUV : Pixel encoding is YUV
* @ V4L2_PIXEL_ENC_RGB : Pixel encoding is RGB
* @ V4L2_PIXEL_ENC_BAYER : Pixel encoding is Bayer
*/
enum v4l2_pixel_encoding {
V4L2_PIXEL_ENC_UNKNOWN = 0 ,
V4L2_PIXEL_ENC_YUV = 1 ,
V4L2_PIXEL_ENC_RGB = 2 ,
V4L2_PIXEL_ENC_BAYER = 3 ,
};
/**
* struct v4l2_format_info - information about a V4L2 format
* @ format : 4 CC format identifier ( V4L2_PIX_FMT_ * )
* @ pixel_enc : Pixel encoding ( see enum v4l2_pixel_encoding above )
* @ mem_planes : Number of memory planes , which includes the alpha plane ( 1 to 4 ) .
* @ comp_planes : Number of component planes , which includes the alpha plane ( 1 to 4 ) .
* @ bpp : Array of per - plane bytes per pixel
* @ bpp_div : Array of per - plane bytes per pixel divisors to support fractional pixel sizes .
* @ hdiv : Horizontal chroma subsampling factor
* @ vdiv : Vertical chroma subsampling factor
* @ block_w : Per - plane macroblock pixel width ( optional )
* @ block_h : Per - plane macroblock pixel height ( optional )
*/
struct v4l2_format_info {
u32 format;
u8 pixel_enc;
u8 mem_planes;
u8 comp_planes;
u8 bpp[4 ];
u8 bpp_div[4 ];
u8 hdiv;
u8 vdiv;
u8 block_w[4 ];
u8 block_h[4 ];
};
static inline bool v4l2_is_format_rgb(const struct v4l2_format_info *f)
{
return f && f->pixel_enc == V4L2_PIXEL_ENC_RGB;
}
static inline bool v4l2_is_format_yuv(const struct v4l2_format_info *f)
{
return f && f->pixel_enc == V4L2_PIXEL_ENC_YUV;
}
static inline bool v4l2_is_format_bayer(const struct v4l2_format_info *f)
{
return f && f->pixel_enc == V4L2_PIXEL_ENC_BAYER;
}
const struct v4l2_format_info *v4l2_format_info(u32 format);
void v4l2_apply_frmsize_constraints(u32 *width, u32 *height,
const struct v4l2_frmsize_stepwise *frmsize);
int v4l2_fill_pixfmt(struct v4l2_pix_format *pixfmt, u32 pixelformat,
u32 width, u32 height);
int v4l2_fill_pixfmt_mp(struct v4l2_pix_format_mplane *pixfmt, u32 pixelformat,
u32 width, u32 height);
/**
* v4l2_get_link_freq - Get link rate from transmitter
*
* @ pad : The transmitter ' s media pad ( or control handler for non - MC users or
* compatibility reasons , don ' t use in new code )
* @ mul : The multiplier between pixel rate and link frequency . Bits per pixel on
* D - PHY , samples per clock on parallel . 0 otherwise .
* @ div : The divisor between pixel rate and link frequency . Number of data lanes
* times two on D - PHY , 1 on parallel . 0 otherwise .
*
* This function is intended for obtaining the link frequency from the
* transmitter sub - devices . It returns the link rate , either from the
* V4L2_CID_LINK_FREQ control implemented by the transmitter , or value
* calculated based on the V4L2_CID_PIXEL_RATE implemented by the transmitter .
*
* Return :
* * > 0 : Link frequency
* * % - ENOENT : Link frequency or pixel rate control not found
* * % - EINVAL : Invalid link frequency value
*/
#ifdef CONFIG_MEDIA_CONTROLLER
#define v4l2_get_link_freq(pad, mul, div) \
_Generic(pad, \
struct media_pad *: __v4l2_get_link_freq_pad, \
struct v4l2_ctrl_handler *: __v4l2_get_link_freq_ctrl) \
(pad, mul, div)
s64 __v4l2_get_link_freq_pad(struct media_pad *pad, unsigned int mul,
unsigned int div);
#else
#define v4l2_get_link_freq(handler, mul, div) \
__v4l2_get_link_freq_ctrl(handler, mul, div)
#endif
s64 __v4l2_get_link_freq_ctrl(struct v4l2_ctrl_handler *handler,
unsigned int mul, unsigned int div);
void v4l2_simplify_fraction(u32 *numerator, u32 *denominator,
unsigned int n_terms, unsigned int threshold);
u32 v4l2_fraction_to_interval(u32 numerator, u32 denominator);
/**
* v4l2_link_freq_to_bitmap - Figure out platform - supported link frequencies
* @ dev : The struct device
* @ fw_link_freqs : Array of link frequencies from firmware
* @ num_of_fw_link_freqs : Number of entries in @ fw_link_freqs
* @ driver_link_freqs : Array of link frequencies supported by the driver
* @ num_of_driver_link_freqs : Number of entries in @ driver_link_freqs
* @ bitmap : Bitmap of driver - supported link frequencies found in @ fw_link_freqs
*
* This function checks which driver - supported link frequencies are enabled in
* system firmware and sets the corresponding bits in @ bitmap ( after first
* zeroing it ) .
*
* Return :
* * % 0 : Success
* * % - ENOENT : No match found between driver - supported link frequencies and
* those available in firmware .
* * % - ENODATA : No link frequencies were specified in firmware .
*/
int v4l2_link_freq_to_bitmap(struct device *dev, const u64 *fw_link_freqs,
unsigned int num_of_fw_link_freqs,
const s64 *driver_link_freqs,
unsigned int num_of_driver_link_freqs,
unsigned long *bitmap);
static inline u64 v4l2_buffer_get_timestamp(const struct v4l2_buffer *buf)
{
/*
* When the timestamp comes from 32 - bit user space , there may be
* uninitialized data in tv_usec , so cast it to u32 .
* Otherwise allow invalid input for backwards compatibility .
*/
return buf->timestamp.tv_sec * NSEC_PER_SEC +
(u32)buf->timestamp.tv_usec * NSEC_PER_USEC;
}
static inline void v4l2_buffer_set_timestamp(struct v4l2_buffer *buf,
u64 timestamp)
{
struct timespec64 ts = ns_to_timespec64(timestamp);
buf->timestamp.tv_sec = ts.tv_sec;
buf->timestamp.tv_usec = ts.tv_nsec / NSEC_PER_USEC;
}
static inline bool v4l2_is_colorspace_valid(__u32 colorspace)
{
return colorspace > V4L2_COLORSPACE_DEFAULT &&
colorspace < V4L2_COLORSPACE_LAST;
}
static inline bool v4l2_is_xfer_func_valid(__u32 xfer_func)
{
return xfer_func > V4L2_XFER_FUNC_DEFAULT &&
xfer_func < V4L2_XFER_FUNC_LAST;
}
static inline bool v4l2_is_ycbcr_enc_valid(__u8 ycbcr_enc)
{
return ycbcr_enc > V4L2_YCBCR_ENC_DEFAULT &&
ycbcr_enc < V4L2_YCBCR_ENC_LAST;
}
static inline bool v4l2_is_hsv_enc_valid(__u8 hsv_enc)
{
return hsv_enc == V4L2_HSV_ENC_180 || hsv_enc == V4L2_HSV_ENC_256;
}
static inline bool v4l2_is_quant_valid(__u8 quantization)
{
return quantization == V4L2_QUANTIZATION_FULL_RANGE ||
quantization == V4L2_QUANTIZATION_LIM_RANGE;
}
#endif /* V4L2_COMMON_H_ */
Messung V0.5 in Prozent C=94 H=96 G=94
¤ Dauer der Verarbeitung: 0.26 Sekunden
(vorverarbeitet am 2026-09-28)
¤
*© Formatika GbR, Deutschland