summaryrefslogtreecommitdiff
path: root/3rdparty/media-ctl/libv4l2subdev.c
diff options
context:
space:
mode:
Diffstat (limited to '3rdparty/media-ctl/libv4l2subdev.c')
-rw-r--r--3rdparty/media-ctl/libv4l2subdev.c843
1 files changed, 843 insertions, 0 deletions
diff --git a/3rdparty/media-ctl/libv4l2subdev.c b/3rdparty/media-ctl/libv4l2subdev.c
new file mode 100644
index 0000000..3dcf943
--- /dev/null
+++ b/3rdparty/media-ctl/libv4l2subdev.c
@@ -0,0 +1,843 @@
+/*
+ * V4L2 subdev interface library
+ *
+ * Copyright (C) 2010-2014 Ideas on board SPRL
+ *
+ * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation; either version 2.1 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <linux/v4l2-subdev.h>
+
+#include "mediactl.h"
+#include "mediactl-priv.h"
+#include "tools.h"
+#include "v4l2subdev.h"
+
+int v4l2_subdev_open(struct media_entity *entity)
+{
+ if (entity->fd != -1)
+ return 0;
+
+ entity->fd = open(entity->devname, O_RDWR);
+ if (entity->fd == -1) {
+ int ret = -errno;
+ media_dbg(entity->media,
+ "%s: Failed to open subdev device node %s\n", __func__,
+ entity->devname);
+ return ret;
+ }
+
+ return 0;
+}
+
+void v4l2_subdev_close(struct media_entity *entity)
+{
+ close(entity->fd);
+ entity->fd = -1;
+}
+
+int v4l2_subdev_get_format(struct media_entity *entity,
+ struct v4l2_mbus_framefmt *format, unsigned int pad,
+ enum v4l2_subdev_format_whence which)
+{
+ struct v4l2_subdev_format fmt;
+ int ret;
+
+ ret = v4l2_subdev_open(entity);
+ if (ret < 0)
+ return ret;
+
+ memset(&fmt, 0, sizeof(fmt));
+ fmt.pad = pad;
+ fmt.which = which;
+
+ ret = ioctl(entity->fd, VIDIOC_SUBDEV_G_FMT, &fmt);
+ if (ret < 0)
+ return -errno;
+
+ *format = fmt.format;
+ return 0;
+}
+
+int v4l2_subdev_set_format(struct media_entity *entity,
+ struct v4l2_mbus_framefmt *format, unsigned int pad,
+ enum v4l2_subdev_format_whence which)
+{
+ struct v4l2_subdev_format fmt;
+ int ret;
+
+ ret = v4l2_subdev_open(entity);
+ if (ret < 0)
+ return ret;
+
+ memset(&fmt, 0, sizeof(fmt));
+ fmt.pad = pad;
+ fmt.which = which;
+ fmt.format = *format;
+
+ ret = ioctl(entity->fd, VIDIOC_SUBDEV_S_FMT, &fmt);
+ if (ret < 0)
+ return -errno;
+
+ *format = fmt.format;
+ return 0;
+}
+
+int v4l2_subdev_get_selection(struct media_entity *entity,
+ struct v4l2_rect *rect, unsigned int pad, unsigned int target,
+ enum v4l2_subdev_format_whence which)
+{
+ union {
+ struct v4l2_subdev_selection sel;
+ struct v4l2_subdev_crop crop;
+ } u;
+ int ret;
+
+ ret = v4l2_subdev_open(entity);
+ if (ret < 0)
+ return ret;
+
+ memset(&u.sel, 0, sizeof(u.sel));
+ u.sel.pad = pad;
+ u.sel.target = target;
+ u.sel.which = which;
+
+ ret = ioctl(entity->fd, VIDIOC_SUBDEV_G_SELECTION, &u.sel);
+ if (ret >= 0) {
+ *rect = u.sel.r;
+ return 0;
+ }
+ if (errno != ENOTTY || target != V4L2_SEL_TGT_CROP)
+ return -errno;
+
+ memset(&u.crop, 0, sizeof(u.crop));
+ u.crop.pad = pad;
+ u.crop.which = which;
+
+ ret = ioctl(entity->fd, VIDIOC_SUBDEV_G_CROP, &u.crop);
+ if (ret < 0)
+ return -errno;
+
+ *rect = u.crop.rect;
+ return 0;
+}
+
+int v4l2_subdev_set_selection(struct media_entity *entity,
+ struct v4l2_rect *rect, unsigned int pad, unsigned int target,
+ enum v4l2_subdev_format_whence which)
+{
+ union {
+ struct v4l2_subdev_selection sel;
+ struct v4l2_subdev_crop crop;
+ } u;
+ int ret;
+
+ ret = v4l2_subdev_open(entity);
+ if (ret < 0)
+ return ret;
+
+ memset(&u.sel, 0, sizeof(u.sel));
+ u.sel.pad = pad;
+ u.sel.target = target;
+ u.sel.which = which;
+ u.sel.r = *rect;
+
+ ret = ioctl(entity->fd, VIDIOC_SUBDEV_S_SELECTION, &u.sel);
+ if (ret >= 0) {
+ *rect = u.sel.r;
+ return 0;
+ }
+ if (errno != ENOTTY || target != V4L2_SEL_TGT_CROP)
+ return -errno;
+
+ memset(&u.crop, 0, sizeof(u.crop));
+ u.crop.pad = pad;
+ u.crop.which = which;
+ u.crop.rect = *rect;
+
+ ret = ioctl(entity->fd, VIDIOC_SUBDEV_S_CROP, &u.crop);
+ if (ret < 0)
+ return -errno;
+
+ *rect = u.crop.rect;
+ return 0;
+}
+
+int v4l2_subdev_get_dv_timings_caps(struct media_entity *entity,
+ struct v4l2_dv_timings_cap *caps)
+{
+ unsigned int pad = caps->pad;
+ int ret;
+
+ ret = v4l2_subdev_open(entity);
+ if (ret < 0)
+ return ret;
+
+ memset(caps, 0, sizeof(*caps));
+ caps->pad = pad;
+
+ ret = ioctl(entity->fd, VIDIOC_SUBDEV_DV_TIMINGS_CAP, caps);
+ if (ret < 0)
+ return -errno;
+
+ return 0;
+}
+
+int v4l2_subdev_query_dv_timings(struct media_entity *entity,
+ struct v4l2_dv_timings *timings)
+{
+ int ret;
+
+ ret = v4l2_subdev_open(entity);
+ if (ret < 0)
+ return ret;
+
+ memset(timings, 0, sizeof(*timings));
+
+ ret = ioctl(entity->fd, VIDIOC_SUBDEV_QUERY_DV_TIMINGS, timings);
+ if (ret < 0)
+ return -errno;
+
+ return 0;
+}
+
+int v4l2_subdev_get_dv_timings(struct media_entity *entity,
+ struct v4l2_dv_timings *timings)
+{
+ int ret;
+
+ ret = v4l2_subdev_open(entity);
+ if (ret < 0)
+ return ret;
+
+ memset(timings, 0, sizeof(*timings));
+
+ ret = ioctl(entity->fd, VIDIOC_SUBDEV_G_DV_TIMINGS, timings);
+ if (ret < 0)
+ return -errno;
+
+ return 0;
+}
+
+int v4l2_subdev_set_dv_timings(struct media_entity *entity,
+ struct v4l2_dv_timings *timings)
+{
+ int ret;
+
+ ret = v4l2_subdev_open(entity);
+ if (ret < 0)
+ return ret;
+
+ ret = ioctl(entity->fd, VIDIOC_SUBDEV_S_DV_TIMINGS, timings);
+ if (ret < 0)
+ return -errno;
+
+ return 0;
+}
+
+int v4l2_subdev_get_frame_interval(struct media_entity *entity,
+ struct v4l2_fract *interval)
+{
+ struct v4l2_subdev_frame_interval ival;
+ int ret;
+
+ ret = v4l2_subdev_open(entity);
+ if (ret < 0)
+ return ret;
+
+ memset(&ival, 0, sizeof(ival));
+
+ ret = ioctl(entity->fd, VIDIOC_SUBDEV_G_FRAME_INTERVAL, &ival);
+ if (ret < 0)
+ return -errno;
+
+ *interval = ival.interval;
+ return 0;
+}
+
+int v4l2_subdev_set_frame_interval(struct media_entity *entity,
+ struct v4l2_fract *interval)
+{
+ struct v4l2_subdev_frame_interval ival;
+ int ret;
+
+ ret = v4l2_subdev_open(entity);
+ if (ret < 0)
+ return ret;
+
+ memset(&ival, 0, sizeof(ival));
+ ival.interval = *interval;
+
+ ret = ioctl(entity->fd, VIDIOC_SUBDEV_S_FRAME_INTERVAL, &ival);
+ if (ret < 0)
+ return -errno;
+
+ *interval = ival.interval;
+ return 0;
+}
+
+static int v4l2_subdev_parse_format(struct media_device *media,
+ struct v4l2_mbus_framefmt *format,
+ const char *p, char **endp)
+{
+ enum v4l2_mbus_pixelcode code;
+ unsigned int width, height;
+ char *fmt;
+ char *end;
+
+ /*
+ * Compatibility with the old syntax: consider space as valid
+ * separator between the media bus pixel code and the size.
+ */
+ for (; isspace(*p); ++p);
+ for (end = (char *)p;
+ *end != '/' && *end != ' ' && *end != '\0'; ++end);
+
+ fmt = strndup(p, end - p);
+ if (!fmt)
+ return -ENOMEM;
+
+ code = v4l2_subdev_string_to_pixelcode(fmt);
+ free(fmt);
+ if (code == (enum v4l2_mbus_pixelcode)-1) {
+ media_dbg(media, "Invalid pixel code '%.*s'\n", end - p, p);
+ return -EINVAL;
+ }
+
+ p = end + 1;
+ width = strtoul(p, &end, 10);
+ if (*end != 'x') {
+ media_dbg(media, "Expected 'x'\n");
+ return -EINVAL;
+ }
+
+ p = end + 1;
+ height = strtoul(p, &end, 10);
+ *endp = end;
+
+ memset(format, 0, sizeof(*format));
+ format->width = width;
+ format->height = height;
+ format->code = code;
+
+ return 0;
+}
+
+static int v4l2_subdev_parse_rectangle(struct media_device *media,
+ struct v4l2_rect *r, const char *p,
+ char **endp)
+{
+ char *end;
+
+ if (*p++ != '(') {
+ media_dbg(media, "Expected '('\n");
+ *endp = (char *)p - 1;
+ return -EINVAL;
+ }
+
+ r->left = strtoul(p, &end, 10);
+ if (*end != ',') {
+ media_dbg(media, "Expected ','\n");
+ *endp = end;
+ return -EINVAL;
+ }
+
+ p = end + 1;
+ r->top = strtoul(p, &end, 10);
+ if (*end++ != ')') {
+ media_dbg(media, "Expected ')'\n");
+ *endp = end - 1;
+ return -EINVAL;
+ }
+ if (*end != '/') {
+ media_dbg(media, "Expected '/'\n");
+ *endp = end;
+ return -EINVAL;
+ }
+
+ p = end + 1;
+ r->width = strtoul(p, &end, 10);
+ if (*end != 'x') {
+ media_dbg(media, "Expected 'x'\n");
+ *endp = end;
+ return -EINVAL;
+ }
+
+ p = end + 1;
+ r->height = strtoul(p, &end, 10);
+ *endp = end;
+
+ return 0;
+}
+
+static int v4l2_subdev_parse_frame_interval(struct media_device *media,
+ struct v4l2_fract *interval,
+ const char *p, char **endp)
+{
+ char *end;
+
+ for (; isspace(*p); ++p);
+
+ interval->numerator = strtoul(p, &end, 10);
+
+ for (p = end; isspace(*p); ++p);
+ if (*p++ != '/') {
+ media_dbg(media, "Expected '/'\n");
+ *endp = (char *)p - 1;
+ return -EINVAL;
+ }
+
+ for (; isspace(*p); ++p);
+ interval->denominator = strtoul(p, &end, 10);
+
+ *endp = end;
+ return 0;
+}
+
+/*
+ * The debate over whether this function should be named icanhasstr() instead
+ * has been strong and heated. If you feel like this would be an important
+ * change, patches are welcome (or not).
+ */
+static bool strhazit(const char *str, const char **p)
+{
+ int len = strlen(str);
+
+ if (strncmp(str, *p, len))
+ return false;
+
+ for (*p += len; isspace(**p); ++*p);
+ return true;
+}
+
+static struct media_pad *v4l2_subdev_parse_pad_format(
+ struct media_device *media, struct v4l2_mbus_framefmt *format,
+ struct v4l2_rect *crop, struct v4l2_rect *compose,
+ struct v4l2_fract *interval, const char *p, char **endp)
+{
+ struct media_pad *pad;
+ bool first;
+ char *end;
+ int ret;
+
+ for (; isspace(*p); ++p);
+
+ pad = media_parse_pad(media, p, &end);
+ if (pad == NULL) {
+ *endp = end;
+ return NULL;
+ }
+
+ for (p = end; isspace(*p); ++p);
+ if (*p++ != '[') {
+ media_dbg(media, "Expected '['\n");
+ *endp = (char *)p - 1;
+ return NULL;
+ }
+
+ for (first = true; ; first = false) {
+ for (; isspace(*p); p++);
+
+ /*
+ * Backward compatibility: if the first property starts with an
+ * uppercase later, process it as a format description.
+ */
+ if (strhazit("fmt:", &p) || (first && isupper(*p))) {
+ ret = v4l2_subdev_parse_format(media, format, p, &end);
+ if (ret < 0) {
+ *endp = end;
+ return NULL;
+ }
+
+ p = end;
+ continue;
+ }
+
+ if (strhazit("field:", &p)) {
+ enum v4l2_field field;
+ char *strfield;
+
+ for (end = (char *)p; isalpha(*end) || *end == '-';
+ ++end);
+
+ strfield = strndup(p, end - p);
+ if (!strfield) {
+ *endp = (char *)p;
+ return NULL;
+ }
+
+ field = v4l2_subdev_string_to_field(strfield);
+ free(strfield);
+ if (field == (enum v4l2_field)-1) {
+ media_dbg(media, "Invalid field value '%*s'\n",
+ end - p, p);
+ *endp = (char *)p;
+ return NULL;
+ }
+
+ format->field = field;
+
+ p = end;
+ continue;
+ }
+
+ /*
+ * Backward compatibility: crop rectangles can be specified
+ * implicitly without the 'crop:' property name.
+ */
+ if (strhazit("crop:", &p) || *p == '(') {
+ ret = v4l2_subdev_parse_rectangle(media, crop, p, &end);
+ if (ret < 0) {
+ *endp = end;
+ return NULL;
+ }
+
+ p = end;
+ continue;
+ }
+
+ if (strhazit("compose:", &p)) {
+ ret = v4l2_subdev_parse_rectangle(media, compose, p, &end);
+ if (ret < 0) {
+ *endp = end;
+ return NULL;
+ }
+
+ for (p = end; isspace(*p); p++);
+ continue;
+ }
+
+ if (*p == '@') {
+ ret = v4l2_subdev_parse_frame_interval(media, interval, ++p, &end);
+ if (ret < 0) {
+ *endp = end;
+ return NULL;
+ }
+
+ p = end;
+ continue;
+ }
+
+ break;
+ }
+
+ if (*p != ']') {
+ media_dbg(media, "Expected ']'\n");
+ *endp = (char *)p;
+ return NULL;
+ }
+
+ *endp = (char *)p + 1;
+ return pad;
+}
+
+static int set_format(struct media_pad *pad,
+ struct v4l2_mbus_framefmt *format)
+{
+ int ret;
+
+ if (format->width == 0 || format->height == 0)
+ return 0;
+
+ media_dbg(pad->entity->media,
+ "Setting up format %s %ux%u on pad %s/%u\n",
+ v4l2_subdev_pixelcode_to_string(format->code),
+ format->width, format->height,
+ pad->entity->info.name, pad->index);
+
+ ret = v4l2_subdev_set_format(pad->entity, format, pad->index,
+ V4L2_SUBDEV_FORMAT_ACTIVE);
+ if (ret < 0) {
+ media_dbg(pad->entity->media,
+ "Unable to set format: %s (%d)\n",
+ strerror(-ret), ret);
+ return ret;
+ }
+
+ media_dbg(pad->entity->media,
+ "Format set: %s %ux%u\n",
+ v4l2_subdev_pixelcode_to_string(format->code),
+ format->width, format->height);
+
+ return 0;
+}
+
+static int set_selection(struct media_pad *pad, unsigned int target,
+ struct v4l2_rect *rect)
+{
+ int ret;
+
+ if (rect->left == -1 || rect->top == -1)
+ return 0;
+
+ media_dbg(pad->entity->media,
+ "Setting up selection target %u rectangle (%u,%u)/%ux%u on pad %s/%u\n",
+ target, rect->left, rect->top, rect->width, rect->height,
+ pad->entity->info.name, pad->index);
+
+ ret = v4l2_subdev_set_selection(pad->entity, rect, pad->index,
+ target, V4L2_SUBDEV_FORMAT_ACTIVE);
+ if (ret < 0) {
+ media_dbg(pad->entity->media,
+ "Unable to set selection rectangle: %s (%d)\n",
+ strerror(-ret), ret);
+ return ret;
+ }
+
+ media_dbg(pad->entity->media,
+ "Selection rectangle set: (%u,%u)/%ux%u\n",
+ rect->left, rect->top, rect->width, rect->height);
+
+ return 0;
+}
+
+static int set_frame_interval(struct media_entity *entity,
+ struct v4l2_fract *interval)
+{
+ int ret;
+
+ if (interval->numerator == 0)
+ return 0;
+
+ media_dbg(entity->media,
+ "Setting up frame interval %u/%u on entity %s\n",
+ interval->numerator, interval->denominator,
+ entity->info.name);
+
+ ret = v4l2_subdev_set_frame_interval(entity, interval);
+ if (ret < 0) {
+ media_dbg(entity->media,
+ "Unable to set frame interval: %s (%d)",
+ strerror(-ret), ret);
+ return ret;
+ }
+
+ media_dbg(entity->media, "Frame interval set: %u/%u\n",
+ interval->numerator, interval->denominator);
+
+ return 0;
+}
+
+
+static int v4l2_subdev_parse_setup_format(struct media_device *media,
+ const char *p, char **endp)
+{
+ struct v4l2_mbus_framefmt format = { 0, 0, 0 };
+ struct media_pad *pad;
+ struct v4l2_rect crop = { -1, -1, -1, -1 };
+ struct v4l2_rect compose = crop;
+ struct v4l2_fract interval = { 0, 0 };
+ unsigned int i;
+ char *end;
+ int ret;
+
+ pad = v4l2_subdev_parse_pad_format(media, &format, &crop, &compose,
+ &interval, p, &end);
+ if (pad == NULL) {
+ media_print_streampos(media, p, end);
+ media_dbg(media, "Unable to parse format\n");
+ return -EINVAL;
+ }
+
+ if (pad->flags & MEDIA_PAD_FL_SINK) {
+ ret = set_format(pad, &format);
+ if (ret < 0)
+ return ret;
+ }
+
+ ret = set_selection(pad, V4L2_SEL_TGT_CROP, &crop);
+ if (ret < 0)
+ return ret;
+
+ ret = set_selection(pad, V4L2_SEL_TGT_COMPOSE, &compose);
+ if (ret < 0)
+ return ret;
+
+ if (pad->flags & MEDIA_PAD_FL_SOURCE) {
+ ret = set_format(pad, &format);
+ if (ret < 0)
+ return ret;
+ }
+
+ ret = set_frame_interval(pad->entity, &interval);
+ if (ret < 0)
+ return ret;
+
+
+ /* If the pad is an output pad, automatically set the same format on
+ * the remote subdev input pads, if any.
+ */
+ if (pad->flags & MEDIA_PAD_FL_SOURCE) {
+ for (i = 0; i < pad->entity->num_links; ++i) {
+ struct media_link *link = &pad->entity->links[i];
+ struct v4l2_mbus_framefmt remote_format;
+
+ if (!(link->flags & MEDIA_LNK_FL_ENABLED))
+ continue;
+
+ if (link->source == pad &&
+ link->sink->entity->info.type == MEDIA_ENT_T_V4L2_SUBDEV) {
+ remote_format = format;
+ set_format(link->sink, &remote_format);
+ }
+ }
+ }
+
+ *endp = end;
+ return 0;
+}
+
+int v4l2_subdev_parse_setup_formats(struct media_device *media, const char *p)
+{
+ char *end;
+ int ret;
+
+ do {
+ ret = v4l2_subdev_parse_setup_format(media, p, &end);
+ if (ret < 0)
+ return ret;
+
+ for (; isspace(*end); end++);
+ p = end + 1;
+ } while (*end == ',');
+
+ return *end ? -EINVAL : 0;
+}
+
+static const struct {
+ const char *name;
+ enum v4l2_mbus_pixelcode code;
+} mbus_formats[] = {
+#include "media-bus-format-names.h"
+ { "Y8", MEDIA_BUS_FMT_Y8_1X8},
+ { "Y10", MEDIA_BUS_FMT_Y10_1X10 },
+ { "Y12", MEDIA_BUS_FMT_Y12_1X12 },
+ { "YUYV", MEDIA_BUS_FMT_YUYV8_1X16 },
+ { "YUYV1_5X8", MEDIA_BUS_FMT_YUYV8_1_5X8 },
+ { "YUYV2X8", MEDIA_BUS_FMT_YUYV8_2X8 },
+ { "UYVY", MEDIA_BUS_FMT_UYVY8_1X16 },
+ { "UYVY1_5X8", MEDIA_BUS_FMT_UYVY8_1_5X8 },
+ { "UYVY2X8", MEDIA_BUS_FMT_UYVY8_2X8 },
+ { "VUY24", MEDIA_BUS_FMT_VUY8_1X24 },
+ { "SBGGR8", MEDIA_BUS_FMT_SBGGR8_1X8 },
+ { "SGBRG8", MEDIA_BUS_FMT_SGBRG8_1X8 },
+ { "SGRBG8", MEDIA_BUS_FMT_SGRBG8_1X8 },
+ { "SRGGB8", MEDIA_BUS_FMT_SRGGB8_1X8 },
+ { "SBGGR10", MEDIA_BUS_FMT_SBGGR10_1X10 },
+ { "SGBRG10", MEDIA_BUS_FMT_SGBRG10_1X10 },
+ { "SGRBG10", MEDIA_BUS_FMT_SGRBG10_1X10 },
+ { "SRGGB10", MEDIA_BUS_FMT_SRGGB10_1X10 },
+ { "SBGGR10_DPCM8", MEDIA_BUS_FMT_SBGGR10_DPCM8_1X8 },
+ { "SGBRG10_DPCM8", MEDIA_BUS_FMT_SGBRG10_DPCM8_1X8 },
+ { "SGRBG10_DPCM8", MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8 },
+ { "SRGGB10_DPCM8", MEDIA_BUS_FMT_SRGGB10_DPCM8_1X8 },
+ { "SBGGR12", MEDIA_BUS_FMT_SBGGR12_1X12 },
+ { "SGBRG12", MEDIA_BUS_FMT_SGBRG12_1X12 },
+ { "SGRBG12", MEDIA_BUS_FMT_SGRBG12_1X12 },
+ { "SRGGB12", MEDIA_BUS_FMT_SRGGB12_1X12 },
+ { "AYUV32", MEDIA_BUS_FMT_AYUV8_1X32 },
+ { "RBG24", MEDIA_BUS_FMT_RBG888_1X24 },
+ { "RGB32", MEDIA_BUS_FMT_RGB888_1X32_PADHI },
+ { "ARGB32", MEDIA_BUS_FMT_ARGB8888_1X32 },
+};
+
+const char *v4l2_subdev_pixelcode_to_string(enum v4l2_mbus_pixelcode code)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(mbus_formats); ++i) {
+ if (mbus_formats[i].code == code)
+ return mbus_formats[i].name;
+ }
+
+ return "unknown";
+}
+
+enum v4l2_mbus_pixelcode v4l2_subdev_string_to_pixelcode(const char *string)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(mbus_formats); ++i) {
+ if (strcmp(mbus_formats[i].name, string) == 0)
+ return mbus_formats[i].code;
+ }
+
+ return (enum v4l2_mbus_pixelcode)-1;
+}
+
+static struct {
+ const char *name;
+ enum v4l2_field field;
+} fields[] = {
+ { "any", V4L2_FIELD_ANY },
+ { "none", V4L2_FIELD_NONE },
+ { "top", V4L2_FIELD_TOP },
+ { "bottom", V4L2_FIELD_BOTTOM },
+ { "interlaced", V4L2_FIELD_INTERLACED },
+ { "seq-tb", V4L2_FIELD_SEQ_TB },
+ { "seq-bt", V4L2_FIELD_SEQ_BT },
+ { "alternate", V4L2_FIELD_ALTERNATE },
+ { "interlaced-tb", V4L2_FIELD_INTERLACED_TB },
+ { "interlaced-bt", V4L2_FIELD_INTERLACED_BT },
+};
+
+const char *v4l2_subdev_field_to_string(enum v4l2_field field)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(fields); ++i) {
+ if (fields[i].field == field)
+ return fields[i].name;
+ }
+
+ return "unknown";
+}
+
+enum v4l2_field v4l2_subdev_string_to_field(const char *string)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(fields); ++i) {
+ if (strcasecmp(fields[i].name, string) == 0)
+ return fields[i].field;
+ }
+
+ return (enum v4l2_field)-1;
+}
+
+static const enum v4l2_mbus_pixelcode mbus_codes[] = {
+#include "media-bus-format-codes.h"
+};
+
+const enum v4l2_mbus_pixelcode *v4l2_subdev_pixelcode_list(unsigned int *length)
+{
+ *length = ARRAY_SIZE(mbus_codes);
+
+ return mbus_codes;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-12 08:00:15 +0000