mirror of https://gitee.com/openkylin/linux.git
444 lines
20 KiB
C
444 lines
20 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Video for Linux Two
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*
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* A generic video device interface for the LINUX operating system
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* using a set of device structures/vectors for low level operations.
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*
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* This file replaces the videodev.c file that comes with the
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* regular kernel distribution.
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*
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* Author: Bill Dirks <bill@thedirks.org>
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* based on code by Alan Cox, <alan@cymru.net>
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*/
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/*
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* Video capture interface for Linux
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*
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* A generic video device interface for the LINUX operating system
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* using a set of device structures/vectors for low level operations.
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*
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* Author: Alan Cox, <alan@lxorguk.ukuu.org.uk>
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*
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* Fixes:
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*/
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/*
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* Video4linux 1/2 integration by Justin Schoeman
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* <justin@suntiger.ee.up.ac.za>
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* 2.4 PROCFS support ported from 2.4 kernels by
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* Iñaki García Etxebarria <garetxe@euskalnet.net>
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* Makefile fix by "W. Michael Petullo" <mike@flyn.org>
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* 2.4 devfs support ported from 2.4 kernels by
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* Dan Merillat <dan@merillat.org>
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* Added Gerd Knorrs v4l1 enhancements (Justin Schoeman)
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/string.h>
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#include <linux/errno.h>
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#include <linux/uaccess.h>
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#include <asm/io.h>
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#include <asm/div64.h>
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#include <media/v4l2-common.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-ctrls.h>
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#include <linux/videodev2.h>
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/*
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*
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* V 4 L 2 D R I V E R H E L P E R A P I
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*
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*/
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/*
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* Video Standard Operations (contributed by Michael Schimek)
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*/
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/* Helper functions for control handling */
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/* Fill in a struct v4l2_queryctrl */
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int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl, s32 _min, s32 _max, s32 _step, s32 _def)
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{
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const char *name;
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s64 min = _min;
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s64 max = _max;
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u64 step = _step;
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s64 def = _def;
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v4l2_ctrl_fill(qctrl->id, &name, &qctrl->type,
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&min, &max, &step, &def, &qctrl->flags);
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if (name == NULL)
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return -EINVAL;
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qctrl->minimum = min;
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qctrl->maximum = max;
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qctrl->step = step;
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qctrl->default_value = def;
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qctrl->reserved[0] = qctrl->reserved[1] = 0;
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strscpy(qctrl->name, name, sizeof(qctrl->name));
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return 0;
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}
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EXPORT_SYMBOL(v4l2_ctrl_query_fill);
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/* Clamp x to be between min and max, aligned to a multiple of 2^align. min
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* and max don't have to be aligned, but there must be at least one valid
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* value. E.g., min=17,max=31,align=4 is not allowed as there are no multiples
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* of 16 between 17 and 31. */
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static unsigned int clamp_align(unsigned int x, unsigned int min,
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unsigned int max, unsigned int align)
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{
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/* Bits that must be zero to be aligned */
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unsigned int mask = ~((1 << align) - 1);
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/* Clamp to aligned min and max */
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x = clamp(x, (min + ~mask) & mask, max & mask);
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/* Round to nearest aligned value */
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if (align)
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x = (x + (1 << (align - 1))) & mask;
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return x;
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}
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static unsigned int clamp_roundup(unsigned int x, unsigned int min,
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unsigned int max, unsigned int alignment)
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{
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x = clamp(x, min, max);
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if (alignment)
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x = round_up(x, alignment);
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return x;
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}
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void v4l_bound_align_image(u32 *w, unsigned int wmin, unsigned int wmax,
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unsigned int walign,
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u32 *h, unsigned int hmin, unsigned int hmax,
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unsigned int halign, unsigned int salign)
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{
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*w = clamp_align(*w, wmin, wmax, walign);
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*h = clamp_align(*h, hmin, hmax, halign);
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/* Usually we don't need to align the size and are done now. */
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if (!salign)
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return;
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/* How much alignment do we have? */
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walign = __ffs(*w);
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halign = __ffs(*h);
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/* Enough to satisfy the image alignment? */
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if (walign + halign < salign) {
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/* Max walign where there is still a valid width */
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unsigned int wmaxa = __fls(wmax ^ (wmin - 1));
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/* Max halign where there is still a valid height */
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unsigned int hmaxa = __fls(hmax ^ (hmin - 1));
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/* up the smaller alignment until we have enough */
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do {
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if (halign >= hmaxa ||
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(walign <= halign && walign < wmaxa)) {
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*w = clamp_align(*w, wmin, wmax, walign + 1);
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walign = __ffs(*w);
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} else {
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*h = clamp_align(*h, hmin, hmax, halign + 1);
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halign = __ffs(*h);
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}
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} while (halign + walign < salign);
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}
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}
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EXPORT_SYMBOL_GPL(v4l_bound_align_image);
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const void *
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__v4l2_find_nearest_size(const void *array, size_t array_size,
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size_t entry_size, size_t width_offset,
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size_t height_offset, s32 width, s32 height)
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{
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u32 error, min_error = U32_MAX;
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const void *best = NULL;
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unsigned int i;
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if (!array)
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return NULL;
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for (i = 0; i < array_size; i++, array += entry_size) {
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const u32 *entry_width = array + width_offset;
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const u32 *entry_height = array + height_offset;
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error = abs(*entry_width - width) + abs(*entry_height - height);
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if (error > min_error)
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continue;
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min_error = error;
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best = array;
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if (!error)
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break;
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}
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return best;
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}
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EXPORT_SYMBOL_GPL(__v4l2_find_nearest_size);
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int v4l2_g_parm_cap(struct video_device *vdev,
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struct v4l2_subdev *sd, struct v4l2_streamparm *a)
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{
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struct v4l2_subdev_frame_interval ival = { 0 };
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int ret;
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if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
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a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
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return -EINVAL;
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if (vdev->device_caps & V4L2_CAP_READWRITE)
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a->parm.capture.readbuffers = 2;
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if (v4l2_subdev_has_op(sd, video, g_frame_interval))
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a->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
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ret = v4l2_subdev_call(sd, video, g_frame_interval, &ival);
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if (!ret)
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a->parm.capture.timeperframe = ival.interval;
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return ret;
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}
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EXPORT_SYMBOL_GPL(v4l2_g_parm_cap);
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int v4l2_s_parm_cap(struct video_device *vdev,
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struct v4l2_subdev *sd, struct v4l2_streamparm *a)
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{
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struct v4l2_subdev_frame_interval ival = {
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.interval = a->parm.capture.timeperframe
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};
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int ret;
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if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
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a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
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return -EINVAL;
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memset(&a->parm, 0, sizeof(a->parm));
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if (vdev->device_caps & V4L2_CAP_READWRITE)
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a->parm.capture.readbuffers = 2;
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else
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a->parm.capture.readbuffers = 0;
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if (v4l2_subdev_has_op(sd, video, g_frame_interval))
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a->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
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ret = v4l2_subdev_call(sd, video, s_frame_interval, &ival);
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if (!ret)
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a->parm.capture.timeperframe = ival.interval;
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return ret;
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}
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EXPORT_SYMBOL_GPL(v4l2_s_parm_cap);
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const struct v4l2_format_info *v4l2_format_info(u32 format)
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{
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static const struct v4l2_format_info formats[] = {
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/* RGB formats */
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{ .format = V4L2_PIX_FMT_BGR24, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 3, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_RGB24, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 3, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_HSV24, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 3, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_BGR32, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_XBGR32, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_BGRX32, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_RGB32, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_XRGB32, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_RGBX32, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_HSV32, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_ARGB32, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_RGBA32, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_ABGR32, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_BGRA32, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_RGB565, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_RGB555, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_BGR666, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
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/* YUV packed formats */
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{ .format = V4L2_PIX_FMT_YUYV, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 2, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_YVYU, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 2, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_UYVY, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 2, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_VYUY, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 2, .vdiv = 1 },
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/* YUV planar formats */
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{ .format = V4L2_PIX_FMT_NV12, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 2 },
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{ .format = V4L2_PIX_FMT_NV21, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 2 },
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{ .format = V4L2_PIX_FMT_NV16, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_NV61, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_NV24, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 1, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_NV42, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 1, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_YUV410, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 4, .vdiv = 4 },
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{ .format = V4L2_PIX_FMT_YVU410, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 4, .vdiv = 4 },
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{ .format = V4L2_PIX_FMT_YUV411P, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 4, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_YUV420, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 2, .vdiv = 2 },
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{ .format = V4L2_PIX_FMT_YVU420, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 2, .vdiv = 2 },
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{ .format = V4L2_PIX_FMT_YUV422P, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 2, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_GREY, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
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/* YUV planar formats, non contiguous variant */
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{ .format = V4L2_PIX_FMT_YUV420M, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 3, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 2, .vdiv = 2 },
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{ .format = V4L2_PIX_FMT_YVU420M, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 3, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 2, .vdiv = 2 },
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{ .format = V4L2_PIX_FMT_YUV422M, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 3, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 2, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_YVU422M, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 3, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 2, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_YUV444M, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 3, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 1, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_YVU444M, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 3, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 1, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_NV12M, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 2, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 2 },
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{ .format = V4L2_PIX_FMT_NV21M, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 2, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 2 },
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{ .format = V4L2_PIX_FMT_NV16M, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 2, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_NV61M, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 2, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 1 },
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/* Bayer RGB formats */
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{ .format = V4L2_PIX_FMT_SBGGR8, .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_SGBRG8, .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_SGRBG8, .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_SRGGB8, .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_SBGGR10, .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
|
|
{ .format = V4L2_PIX_FMT_SGBRG10, .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
|
|
{ .format = V4L2_PIX_FMT_SGRBG10, .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
|
|
{ .format = V4L2_PIX_FMT_SRGGB10, .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
|
|
{ .format = V4L2_PIX_FMT_SBGGR10ALAW8, .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
|
|
{ .format = V4L2_PIX_FMT_SGBRG10ALAW8, .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
|
|
{ .format = V4L2_PIX_FMT_SGRBG10ALAW8, .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
|
|
{ .format = V4L2_PIX_FMT_SRGGB10ALAW8, .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
|
|
{ .format = V4L2_PIX_FMT_SBGGR10DPCM8, .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
|
|
{ .format = V4L2_PIX_FMT_SGBRG10DPCM8, .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
|
|
{ .format = V4L2_PIX_FMT_SGRBG10DPCM8, .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
|
|
{ .format = V4L2_PIX_FMT_SRGGB10DPCM8, .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
|
|
{ .format = V4L2_PIX_FMT_SBGGR12, .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
|
|
{ .format = V4L2_PIX_FMT_SGBRG12, .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
|
|
{ .format = V4L2_PIX_FMT_SGRBG12, .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
|
|
{ .format = V4L2_PIX_FMT_SRGGB12, .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
|
|
};
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(formats); ++i)
|
|
if (formats[i].format == format)
|
|
return &formats[i];
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL(v4l2_format_info);
|
|
|
|
static inline unsigned int v4l2_format_block_width(const struct v4l2_format_info *info, int plane)
|
|
{
|
|
if (!info->block_w[plane])
|
|
return 1;
|
|
return info->block_w[plane];
|
|
}
|
|
|
|
static inline unsigned int v4l2_format_block_height(const struct v4l2_format_info *info, int plane)
|
|
{
|
|
if (!info->block_h[plane])
|
|
return 1;
|
|
return info->block_h[plane];
|
|
}
|
|
|
|
void v4l2_apply_frmsize_constraints(u32 *width, u32 *height,
|
|
const struct v4l2_frmsize_stepwise *frmsize)
|
|
{
|
|
if (!frmsize)
|
|
return;
|
|
|
|
/*
|
|
* Clamp width/height to meet min/max constraints and round it up to
|
|
* macroblock alignment.
|
|
*/
|
|
*width = clamp_roundup(*width, frmsize->min_width, frmsize->max_width,
|
|
frmsize->step_width);
|
|
*height = clamp_roundup(*height, frmsize->min_height, frmsize->max_height,
|
|
frmsize->step_height);
|
|
}
|
|
EXPORT_SYMBOL_GPL(v4l2_apply_frmsize_constraints);
|
|
|
|
int v4l2_fill_pixfmt_mp(struct v4l2_pix_format_mplane *pixfmt,
|
|
u32 pixelformat, u32 width, u32 height)
|
|
{
|
|
const struct v4l2_format_info *info;
|
|
struct v4l2_plane_pix_format *plane;
|
|
int i;
|
|
|
|
info = v4l2_format_info(pixelformat);
|
|
if (!info)
|
|
return -EINVAL;
|
|
|
|
pixfmt->width = width;
|
|
pixfmt->height = height;
|
|
pixfmt->pixelformat = pixelformat;
|
|
pixfmt->num_planes = info->mem_planes;
|
|
|
|
if (info->mem_planes == 1) {
|
|
plane = &pixfmt->plane_fmt[0];
|
|
plane->bytesperline = ALIGN(width, v4l2_format_block_width(info, 0)) * info->bpp[0];
|
|
plane->sizeimage = 0;
|
|
|
|
for (i = 0; i < info->comp_planes; i++) {
|
|
unsigned int hdiv = (i == 0) ? 1 : info->hdiv;
|
|
unsigned int vdiv = (i == 0) ? 1 : info->vdiv;
|
|
unsigned int aligned_width;
|
|
unsigned int aligned_height;
|
|
|
|
aligned_width = ALIGN(width, v4l2_format_block_width(info, i));
|
|
aligned_height = ALIGN(height, v4l2_format_block_height(info, i));
|
|
|
|
plane->sizeimage += info->bpp[i] *
|
|
DIV_ROUND_UP(aligned_width, hdiv) *
|
|
DIV_ROUND_UP(aligned_height, vdiv);
|
|
}
|
|
} else {
|
|
for (i = 0; i < info->comp_planes; i++) {
|
|
unsigned int hdiv = (i == 0) ? 1 : info->hdiv;
|
|
unsigned int vdiv = (i == 0) ? 1 : info->vdiv;
|
|
unsigned int aligned_width;
|
|
unsigned int aligned_height;
|
|
|
|
aligned_width = ALIGN(width, v4l2_format_block_width(info, i));
|
|
aligned_height = ALIGN(height, v4l2_format_block_height(info, i));
|
|
|
|
plane = &pixfmt->plane_fmt[i];
|
|
plane->bytesperline =
|
|
info->bpp[i] * DIV_ROUND_UP(aligned_width, hdiv);
|
|
plane->sizeimage =
|
|
plane->bytesperline * DIV_ROUND_UP(aligned_height, vdiv);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(v4l2_fill_pixfmt_mp);
|
|
|
|
int v4l2_fill_pixfmt(struct v4l2_pix_format *pixfmt, u32 pixelformat,
|
|
u32 width, u32 height)
|
|
{
|
|
const struct v4l2_format_info *info;
|
|
int i;
|
|
|
|
info = v4l2_format_info(pixelformat);
|
|
if (!info)
|
|
return -EINVAL;
|
|
|
|
/* Single planar API cannot be used for multi plane formats. */
|
|
if (info->mem_planes > 1)
|
|
return -EINVAL;
|
|
|
|
pixfmt->width = width;
|
|
pixfmt->height = height;
|
|
pixfmt->pixelformat = pixelformat;
|
|
pixfmt->bytesperline = ALIGN(width, v4l2_format_block_width(info, 0)) * info->bpp[0];
|
|
pixfmt->sizeimage = 0;
|
|
|
|
for (i = 0; i < info->comp_planes; i++) {
|
|
unsigned int hdiv = (i == 0) ? 1 : info->hdiv;
|
|
unsigned int vdiv = (i == 0) ? 1 : info->vdiv;
|
|
unsigned int aligned_width;
|
|
unsigned int aligned_height;
|
|
|
|
aligned_width = ALIGN(width, v4l2_format_block_width(info, i));
|
|
aligned_height = ALIGN(height, v4l2_format_block_height(info, i));
|
|
|
|
pixfmt->sizeimage += info->bpp[i] *
|
|
DIV_ROUND_UP(aligned_width, hdiv) *
|
|
DIV_ROUND_UP(aligned_height, vdiv);
|
|
}
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(v4l2_fill_pixfmt);
|