/*
- * Media controller test application
+ * V4L2 subdev interface library
*
- * Copyright (C) 2010 Ideas on board SPRL <laurent.pinchart@ideasonboard.com>
+ * Copyright (C) 2010-2011 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 General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
+ * 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 General Public License for more details.
+ * GNU Lesser General Public License for more details.
*
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 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 "v4l2subdev.h"
#include "tools.h"
+#include "v4l2subdev.h"
int v4l2_subdev_open(struct media_entity *entity)
{
entity->fd = open(entity->devname, O_RDWR);
if (entity->fd == -1) {
- printf("%s: Failed to open subdev device node %s\n", __func__,
- entity->devname);
+ media_dbg(entity->media,
+ "%s: Failed to open subdev device node %s\n", __func__,
+ entity->devname);
return -errno;
}
return 0;
}
-int v4l2_subdev_get_crop(struct media_entity *entity, struct v4l2_rect *rect,
- unsigned int pad, enum v4l2_subdev_format_whence which)
+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)
{
- struct v4l2_subdev_crop crop;
+ 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(&crop, 0, sizeof(crop));
- crop.pad = pad;
- crop.which = which;
+ 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, &crop);
+ ret = ioctl(entity->fd, VIDIOC_SUBDEV_G_CROP, &u.crop);
if (ret < 0)
return -errno;
- *rect = crop.rect;
+ *rect = u.crop.rect;
return 0;
}
-int v4l2_subdev_set_crop(struct media_entity *entity, struct v4l2_rect *rect,
- unsigned int pad, enum v4l2_subdev_format_whence which)
+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)
{
- struct v4l2_subdev_crop crop;
+ 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(&crop, 0, sizeof(crop));
- crop.pad = pad;
- crop.which = which;
- crop.rect = *rect;
+ 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;
- ret = ioctl(entity->fd, VIDIOC_SUBDEV_S_CROP, &crop);
+ 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 = crop.rect;
+ *rect = u.crop.rect;
return 0;
}
*interval = ival.interval;
return 0;
}
+
+static int v4l2_subdev_parse_format(struct v4l2_mbus_framefmt *format,
+ const char *p, char **endp)
+{
+ enum v4l2_mbus_pixelcode code;
+ unsigned int width, height;
+ 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);
+
+ code = v4l2_subdev_string_to_pixelcode(p, end - p);
+ if (code == (enum v4l2_mbus_pixelcode)-1)
+ return -EINVAL;
+
+ p = end + 1;
+ width = strtoul(p, &end, 10);
+ if (*end != 'x')
+ 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 v4l2_rect *r, const char *p, char **endp)
+{
+ char *end;
+
+ if (*p++ != '(')
+ return -EINVAL;
+
+ r->left = strtoul(p, &end, 10);
+ if (*end != ',')
+ return -EINVAL;
+
+ p = end + 1;
+ r->top = strtoul(p, &end, 10);
+ if (*end++ != ')')
+ return -EINVAL;
+ if (*end != '/')
+ return -EINVAL;
+
+ p = end + 1;
+ r->width = strtoul(p, &end, 10);
+ if (*end != 'x')
+ return -EINVAL;
+
+ p = end + 1;
+ r->height = strtoul(p, &end, 10);
+ *endp = end;
+
+ return 0;
+}
+
+static int v4l2_subdev_parse_frame_interval(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++ != '/')
+ 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)
+ return NULL;
+
+ for (p = end; isspace(*p); ++p);
+ if (*p++ != '[')
+ 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(format, p, &end);
+ if (ret < 0)
+ return NULL;
+
+ 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(crop, p, &end);
+ if (ret < 0)
+ return NULL;
+
+ p = end;
+ continue;
+ }
+
+ if (strhazit("compose:", &p)) {
+ ret = v4l2_subdev_parse_rectangle(compose, p, &end);
+ if (ret < 0)
+ return NULL;
+
+ for (p = end; isspace(*p); p++);
+ continue;
+ }
+
+ if (*p == '@') {
+ ret = v4l2_subdev_parse_frame_interval(interval, ++p, &end);
+ if (ret < 0)
+ return NULL;
+
+ p = end;
+ continue;
+ }
+
+ break;
+ }
+
+ if (*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_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;
+
+ p = end + 1;
+ } while (*end == ',');
+
+ return *end ? -EINVAL : 0;
+}
+
+static struct {
+ const char *name;
+ enum v4l2_mbus_pixelcode code;
+} mbus_formats[] = {
+ { "Y8", V4L2_MBUS_FMT_Y8_1X8},
+ { "Y10", V4L2_MBUS_FMT_Y10_1X10 },
+ { "Y12", V4L2_MBUS_FMT_Y12_1X12 },
+ { "YUYV", V4L2_MBUS_FMT_YUYV8_1X16 },
+ { "YUYV1_5X8", V4L2_MBUS_FMT_YUYV8_1_5X8 },
+ { "YUYV2X8", V4L2_MBUS_FMT_YUYV8_2X8 },
+ { "UYVY", V4L2_MBUS_FMT_UYVY8_1X16 },
+ { "UYVY1_5X8", V4L2_MBUS_FMT_UYVY8_1_5X8 },
+ { "UYVY2X8", V4L2_MBUS_FMT_UYVY8_2X8 },
+ { "SBGGR8", V4L2_MBUS_FMT_SBGGR8_1X8 },
+ { "SGBRG8", V4L2_MBUS_FMT_SGBRG8_1X8 },
+ { "SGRBG8", V4L2_MBUS_FMT_SGRBG8_1X8 },
+ { "SRGGB8", V4L2_MBUS_FMT_SRGGB8_1X8 },
+ { "SBGGR10", V4L2_MBUS_FMT_SBGGR10_1X10 },
+ { "SGBRG10", V4L2_MBUS_FMT_SGBRG10_1X10 },
+ { "SGRBG10", V4L2_MBUS_FMT_SGRBG10_1X10 },
+ { "SRGGB10", V4L2_MBUS_FMT_SRGGB10_1X10 },
+ { "SBGGR10_DPCM8", V4L2_MBUS_FMT_SBGGR10_DPCM8_1X8 },
+ { "SGBRG10_DPCM8", V4L2_MBUS_FMT_SGBRG10_DPCM8_1X8 },
+ { "SGRBG10_DPCM8", V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8 },
+ { "SRGGB10_DPCM8", V4L2_MBUS_FMT_SRGGB10_DPCM8_1X8 },
+ { "SBGGR12", V4L2_MBUS_FMT_SBGGR12_1X12 },
+ { "SGBRG12", V4L2_MBUS_FMT_SGBRG12_1X12 },
+ { "SGRBG12", V4L2_MBUS_FMT_SGRBG12_1X12 },
+ { "SRGGB12", V4L2_MBUS_FMT_SRGGB12_1X12 },
+};
+
+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 length)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(mbus_formats); ++i) {
+ if (strncmp(mbus_formats[i].name, string, length) == 0)
+ break;
+ }
+
+ if (i == ARRAY_SIZE(mbus_formats))
+ return (enum v4l2_mbus_pixelcode)-1;
+
+ return mbus_formats[i].code;
+}
projects / media-ctl.git / blobdiff