| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Ezequiel García | 2591 | 39.13% | 3 | 6.00% |
| Nicolas Dufresne | 997 | 15.06% | 1 | 2.00% |
| Helen Mae Koike Fornazier | 829 | 12.52% | 1 | 2.00% |
| Hans Verkuil | 484 | 7.31% | 10 | 20.00% |
| Benoit Parrot | 362 | 5.47% | 2 | 4.00% |
| Trent Piepho | 298 | 4.50% | 1 | 2.00% |
| Sakari Ailus | 270 | 4.08% | 3 | 6.00% |
| Laurent Pinchart | 198 | 2.99% | 5 | 10.00% |
| Boris Brezillon | 127 | 1.92% | 2 | 4.00% |
| Ming Qian | 122 | 1.84% | 5 | 10.00% |
| Michael Grzeschik | 89 | 1.34% | 1 | 2.00% |
| Benjamin Gaignard | 82 | 1.24% | 2 | 4.00% |
| Dafna Hirschfeld | 48 | 0.72% | 2 | 4.00% |
| Guennadi Liakhovetski | 44 | 0.66% | 1 | 2.00% |
| Gerd Knorr | 36 | 0.54% | 1 | 2.00% |
| Andrey Konovalov | 14 | 0.21% | 1 | 2.00% |
| Maciej Matraszek | 13 | 0.20% | 1 | 2.00% |
| Mauro Carvalho Chehab | 8 | 0.12% | 4 | 8.00% |
| Eduardo Valentin | 4 | 0.06% | 1 | 2.00% |
| Thomas Gleixner | 3 | 0.05% | 1 | 2.00% |
| Jan Engelhardt | 1 | 0.02% | 1 | 2.00% |
| Linus Torvalds | 1 | 0.02% | 1 | 2.00% |
| Total | 6621 | 50 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * Video for Linux Two * * A generic video device interface for the LINUX operating system * using a set of device structures/vectors for low level operations. * * This file replaces the videodev.c file that comes with the * regular kernel distribution. * * Author: Bill Dirks <bill@thedirks.org> * based on code by Alan Cox, <alan@cymru.net> */ /* * Video capture interface for Linux * * A generic video device interface for the LINUX operating system * using a set of device structures/vectors for low level operations. * * Author: Alan Cox, <alan@lxorguk.ukuu.org.uk> * * Fixes: */ /* * Video4linux 1/2 integration by Justin Schoeman * <justin@suntiger.ee.up.ac.za> * 2.4 PROCFS support ported from 2.4 kernels by * Iñaki García Etxebarria <garetxe@euskalnet.net> * Makefile fix by "W. Michael Petullo" <mike@flyn.org> * 2.4 devfs support ported from 2.4 kernels by * Dan Merillat <dan@merillat.org> * Added Gerd Knorrs v4l1 enhancements (Justin Schoeman) */ #include <linux/module.h> #include <linux/types.h> #include <linux/kernel.h> #include <linux/mm.h> #include <linux/string.h> #include <linux/errno.h> #include <linux/uaccess.h> #include <asm/io.h> #include <asm/div64.h> #include <media/v4l2-common.h> #include <media/v4l2-device.h> #include <media/v4l2-ctrls.h> #include <linux/videodev2.h> /* * * V 4 L 2 D R I V E R H E L P E R A P I * */ /* * Video Standard Operations (contributed by Michael Schimek) */ /* Helper functions for control handling */ /* Fill in a struct v4l2_queryctrl */ int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl, s32 _min, s32 _max, s32 _step, s32 _def) { const char *name; s64 min = _min; s64 max = _max; u64 step = _step; s64 def = _def; v4l2_ctrl_fill(qctrl->id, &name, &qctrl->type, &min, &max, &step, &def, &qctrl->flags); if (name == NULL) return -EINVAL; qctrl->minimum = min; qctrl->maximum = max; qctrl->step = step; qctrl->default_value = def; qctrl->reserved[0] = qctrl->reserved[1] = 0; strscpy(qctrl->name, name, sizeof(qctrl->name)); return 0; } EXPORT_SYMBOL(v4l2_ctrl_query_fill); /* Clamp x to be between min and max, aligned to a multiple of 2^align. min * and max don't have to be aligned, but there must be at least one valid * value. E.g., min=17,max=31,align=4 is not allowed as there are no multiples * of 16 between 17 and 31. */ static unsigned int clamp_align(unsigned int x, unsigned int min, unsigned int max, unsigned int align) { /* Bits that must be zero to be aligned */ unsigned int mask = ~((1 << align) - 1); /* Clamp to aligned min and max */ x = clamp(x, (min + ~mask) & mask, max & mask); /* Round to nearest aligned value */ if (align) x = (x + (1 << (align - 1))) & mask; return x; } static unsigned int clamp_roundup(unsigned int x, unsigned int min, unsigned int max, unsigned int alignment) { x = clamp(x, min, max); if (alignment) x = round_up(x, alignment); return x; } void v4l_bound_align_image(u32 *w, unsigned int wmin, unsigned int wmax, unsigned int walign, u32 *h, unsigned int hmin, unsigned int hmax, unsigned int halign, unsigned int salign) { *w = clamp_align(*w, wmin, wmax, walign); *h = clamp_align(*h, hmin, hmax, halign); /* Usually we don't need to align the size and are done now. */ if (!salign) return; /* How much alignment do we have? */ walign = __ffs(*w); halign = __ffs(*h); /* Enough to satisfy the image alignment? */ if (walign + halign < salign) { /* Max walign where there is still a valid width */ unsigned int wmaxa = __fls(wmax ^ (wmin - 1)); /* Max halign where there is still a valid height */ unsigned int hmaxa = __fls(hmax ^ (hmin - 1)); /* up the smaller alignment until we have enough */ do { if (halign >= hmaxa || (walign <= halign && walign < wmaxa)) { *w = clamp_align(*w, wmin, wmax, walign + 1); walign = __ffs(*w); } else { *h = clamp_align(*h, hmin, hmax, halign + 1); halign = __ffs(*h); } } while (halign + walign < salign); } } EXPORT_SYMBOL_GPL(v4l_bound_align_image); const void * __v4l2_find_nearest_size(const void *array, size_t array_size, size_t entry_size, size_t width_offset, size_t height_offset, s32 width, s32 height) { u32 error, min_error = U32_MAX; const void *best = NULL; unsigned int i; if (!array) return NULL; for (i = 0; i < array_size; i++, array += entry_size) { const u32 *entry_width = array + width_offset; const u32 *entry_height = array + height_offset; error = abs(*entry_width - width) + abs(*entry_height - height); if (error > min_error) continue; min_error = error; best = array; if (!error) break; } return best; } EXPORT_SYMBOL_GPL(__v4l2_find_nearest_size); int v4l2_g_parm_cap(struct video_device *vdev, struct v4l2_subdev *sd, struct v4l2_streamparm *a) { struct v4l2_subdev_frame_interval ival = { 0 }; int ret; if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) return -EINVAL; if (vdev->device_caps & V4L2_CAP_READWRITE) a->parm.capture.readbuffers = 2; if (v4l2_subdev_has_op(sd, video, g_frame_interval)) a->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; ret = v4l2_subdev_call(sd, video, g_frame_interval, &ival); if (!ret) a->parm.capture.timeperframe = ival.interval; return ret; } EXPORT_SYMBOL_GPL(v4l2_g_parm_cap); int v4l2_s_parm_cap(struct video_device *vdev, struct v4l2_subdev *sd, struct v4l2_streamparm *a) { struct v4l2_subdev_frame_interval ival = { .interval = a->parm.capture.timeperframe }; int ret; if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) return -EINVAL; memset(&a->parm, 0, sizeof(a->parm)); if (vdev->device_caps & V4L2_CAP_READWRITE) a->parm.capture.readbuffers = 2; else a->parm.capture.readbuffers = 0; if (v4l2_subdev_has_op(sd, video, g_frame_interval)) a->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; ret = v4l2_subdev_call(sd, video, s_frame_interval, &ival); if (!ret) a->parm.capture.timeperframe = ival.interval; return ret; } EXPORT_SYMBOL_GPL(v4l2_s_parm_cap); const struct v4l2_format_info *v4l2_format_info(u32 format) { static const struct v4l2_format_info formats[] = { /* RGB formats */ { .format = V4L2_PIX_FMT_BGR24, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 3, 0, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 1, .vdiv = 1 }, { .format = V4L2_PIX_FMT_RGB24, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 3, 0, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 1, .vdiv = 1 }, { .format = V4L2_PIX_FMT_HSV24, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 3, 0, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 1, .vdiv = 1 }, { .format = V4L2_PIX_FMT_BGR32, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 1, .vdiv = 1 }, { .format = V4L2_PIX_FMT_XBGR32, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 1, .vdiv = 1 }, { .format = V4L2_PIX_FMT_BGRX32, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 1, .vdiv = 1 }, { .format = V4L2_PIX_FMT_RGB32, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 1, .vdiv = 1 }, { .format = V4L2_PIX_FMT_XRGB32, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 1, .vdiv = 1 }, { .format = V4L2_PIX_FMT_RGBX32, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 1, .vdiv = 1 }, { .format = V4L2_PIX_FMT_HSV32, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 1, .vdiv = 1 }, { .format = V4L2_PIX_FMT_ARGB32, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 1, .vdiv = 1 }, { .format = V4L2_PIX_FMT_RGBA32, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 1, .vdiv = 1 }, { .format = V4L2_PIX_FMT_ABGR32, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 1, .vdiv = 1 }, { .format = V4L2_PIX_FMT_BGRA32, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 1, .vdiv = 1 }, { .format = V4L2_PIX_FMT_RGB565, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 1, .vdiv = 1 }, { .format = V4L2_PIX_FMT_RGB555, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 1, .vdiv = 1 }, { .format = V4L2_PIX_FMT_BGR666, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 1, .vdiv = 1 }, { .format = V4L2_PIX_FMT_BGR48_12, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 6, 0, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 1, .vdiv = 1 }, { .format = V4L2_PIX_FMT_ABGR64_12, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 8, 0, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 1, .vdiv = 1 }, /* YUV packed formats */ { .format = V4L2_PIX_FMT_YUYV, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 2, .vdiv = 1 }, { .format = V4L2_PIX_FMT_YVYU, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 2, .vdiv = 1 }, { .format = V4L2_PIX_FMT_UYVY, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 2, .vdiv = 1 }, { .format = V4L2_PIX_FMT_VYUY, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 2, .vdiv = 1 }, { .format = V4L2_PIX_FMT_Y212, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 2, .vdiv = 1 }, { .format = V4L2_PIX_FMT_YUV48_12, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 1, .bpp = { 6, 0, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 1, .vdiv = 1 }, /* YUV planar formats */ { .format = V4L2_PIX_FMT_NV12, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 2, .vdiv = 2 }, { .format = V4L2_PIX_FMT_NV21, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 2, .vdiv = 2 }, { .format = V4L2_PIX_FMT_NV16, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 2, .vdiv = 1 }, { .format = V4L2_PIX_FMT_NV61, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 2, .vdiv = 1 }, { .format = V4L2_PIX_FMT_NV24, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 1, .vdiv = 1 }, { .format = V4L2_PIX_FMT_NV42, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 1, .vdiv = 1 }, { .format = V4L2_PIX_FMT_P010, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 2, 2, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 2, .vdiv = 1 }, { .format = V4L2_PIX_FMT_P012, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 2, 4, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 2, .vdiv = 2 }, { .format = V4L2_PIX_FMT_YUV410, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 4, .vdiv = 4 }, { .format = V4L2_PIX_FMT_YVU410, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 4, .vdiv = 4 }, { .format = V4L2_PIX_FMT_YUV411P, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 4, .vdiv = 1 }, { .format = V4L2_PIX_FMT_YUV420, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 2, .vdiv = 2 }, { .format = V4L2_PIX_FMT_YVU420, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 2, .vdiv = 2 }, { .format = V4L2_PIX_FMT_YUV422P, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 2, .vdiv = 1 }, { .format = V4L2_PIX_FMT_GREY, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 1, .vdiv = 1 }, /* Tiled YUV formats */ { .format = V4L2_PIX_FMT_NV12_4L4, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 2, .vdiv = 2 }, { .format = V4L2_PIX_FMT_NV15_4L4, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 5, 10, 0, 0 }, .bpp_div = { 4, 4, 1, 1 }, .hdiv = 2, .vdiv = 2, .block_w = { 4, 2, 0, 0 }, .block_h = { 1, 1, 0, 0 }}, { .format = V4L2_PIX_FMT_P010_4L4, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 2, 4, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 2, .vdiv = 2 }, /* YUV planar formats, non contiguous variant */ { .format = V4L2_PIX_FMT_YUV420M, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 3, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 2, .vdiv = 2 }, { .format = V4L2_PIX_FMT_YVU420M, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 3, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 2, .vdiv = 2 }, { .format = V4L2_PIX_FMT_YUV422M, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 3, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 2, .vdiv = 1 }, { .format = V4L2_PIX_FMT_YVU422M, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 3, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 2, .vdiv = 1 }, { .format = V4L2_PIX_FMT_YUV444M, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 3, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 1, .vdiv = 1 }, { .format = V4L2_PIX_FMT_YVU444M, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 3, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 1, .vdiv = 1 }, { .format = V4L2_PIX_FMT_NV12M, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 2, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 2, .vdiv = 2 }, { .format = V4L2_PIX_FMT_NV21M, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 2, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 2, .vdiv = 2 }, { .format = V4L2_PIX_FMT_NV16M, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 2, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 2, .vdiv = 1 }, { .format = V4L2_PIX_FMT_NV61M, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 2, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 2, .vdiv = 1 }, { .format = V4L2_PIX_FMT_P012M, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 2, .comp_planes = 2, .bpp = { 2, 4, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 2, .vdiv = 2 }, /* Bayer RGB formats */ { .format = V4L2_PIX_FMT_SBGGR8, .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 1, .vdiv = 1 }, { .format = V4L2_PIX_FMT_SGBRG8, .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 1, .vdiv = 1 }, { .format = V4L2_PIX_FMT_SGRBG8, .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 1, .vdiv = 1 }, { .format = V4L2_PIX_FMT_SRGGB8, .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 1, .vdiv = 1 }, { .format = V4L2_PIX_FMT_SBGGR10, .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .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 }, .bpp_div = { 1, 1, 1, 1 }, .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 }, .bpp_div = { 1, 1, 1, 1 }, .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 }, .bpp_div = { 1, 1, 1, 1 }, .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 }, .bpp_div = { 1, 1, 1, 1 }, .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 }, .bpp_div = { 1, 1, 1, 1 }, .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 }, .bpp_div = { 1, 1, 1, 1 }, .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 }, .bpp_div = { 1, 1, 1, 1 }, .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 }, .bpp_div = { 1, 1, 1, 1 }, .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 }, .bpp_div = { 1, 1, 1, 1 }, .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 }, .bpp_div = { 1, 1, 1, 1 }, .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 }, .bpp_div = { 1, 1, 1, 1 }, .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 }, .bpp_div = { 1, 1, 1, 1 }, .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 }, .bpp_div = { 1, 1, 1, 1 }, .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 }, .bpp_div = { 1, 1, 1, 1 }, .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 }, .bpp_div = { 1, 1, 1, 1 }, .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] / info->bpp_div[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) / info->bpp_div[i]; } } 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) / info->bpp_div[i]; 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] / info->bpp_div[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) / info->bpp_div[i]; } return 0; } EXPORT_SYMBOL_GPL(v4l2_fill_pixfmt); s64 v4l2_get_link_freq(struct v4l2_ctrl_handler *handler, unsigned int mul, unsigned int div) { struct v4l2_ctrl *ctrl; s64 freq; ctrl = v4l2_ctrl_find(handler, V4L2_CID_LINK_FREQ); if (ctrl) { struct v4l2_querymenu qm = { .id = V4L2_CID_LINK_FREQ }; int ret; qm.index = v4l2_ctrl_g_ctrl(ctrl); ret = v4l2_querymenu(handler, &qm); if (ret) return -ENOENT; freq = qm.value; } else { if (!mul || !div) return -ENOENT; ctrl = v4l2_ctrl_find(handler, V4L2_CID_PIXEL_RATE); if (!ctrl) return -ENOENT; freq = div_u64(v4l2_ctrl_g_ctrl_int64(ctrl) * mul, div); pr_warn("%s: Link frequency estimated using pixel rate: result might be inaccurate\n", __func__); pr_warn("%s: Consider implementing support for V4L2_CID_LINK_FREQ in the transmitter driver\n", __func__); } return freq > 0 ? freq : -EINVAL; } EXPORT_SYMBOL_GPL(v4l2_get_link_freq); /* * Simplify a fraction using a simple continued fraction decomposition. The * idea here is to convert fractions such as 333333/10000000 to 1/30 using * 32 bit arithmetic only. The algorithm is not perfect and relies upon two * arbitrary parameters to remove non-significative terms from the simple * continued fraction decomposition. Using 8 and 333 for n_terms and threshold * respectively seems to give nice results. */ void v4l2_simplify_fraction(u32 *numerator, u32 *denominator, unsigned int n_terms, unsigned int threshold) { u32 *an; u32 x, y, r; unsigned int i, n; an = kmalloc_array(n_terms, sizeof(*an), GFP_KERNEL); if (an == NULL) return; /* * Convert the fraction to a simple continued fraction. See * https://en.wikipedia.org/wiki/Continued_fraction * Stop if the current term is bigger than or equal to the given * threshold. */ x = *numerator; y = *denominator; for (n = 0; n < n_terms && y != 0; ++n) { an[n] = x / y; if (an[n] >= threshold) { if (n < 2) n++; break; } r = x - an[n] * y; x = y; y = r; } /* Expand the simple continued fraction back to an integer fraction. */ x = 0; y = 1; for (i = n; i > 0; --i) { r = y; y = an[i-1] * y + x; x = r; } *numerator = y; *denominator = x; kfree(an); } EXPORT_SYMBOL_GPL(v4l2_simplify_fraction); /* * Convert a fraction to a frame interval in 100ns multiples. The idea here is * to compute numerator / denominator * 10000000 using 32 bit fixed point * arithmetic only. */ u32 v4l2_fraction_to_interval(u32 numerator, u32 denominator) { u32 multiplier; /* Saturate the result if the operation would overflow. */ if (denominator == 0 || numerator/denominator >= ((u32)-1)/10000000) return (u32)-1; /* * Divide both the denominator and the multiplier by two until * numerator * multiplier doesn't overflow. If anyone knows a better * algorithm please let me know. */ multiplier = 10000000; while (numerator > ((u32)-1)/multiplier) { multiplier /= 2; denominator /= 2; } return denominator ? numerator * multiplier / denominator : 0; } EXPORT_SYMBOL_GPL(v4l2_fraction_to_interval);
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