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-rw-r--r--src/main.c4
-rw-r--r--src/v4l2subdev.c92
-rw-r--r--src/v4l2subdev.h35
3 files changed, 87 insertions, 44 deletions
diff --git a/src/main.c b/src/main.c
index 4f3271c..53964e4 100644
--- a/src/main.c
+++ b/src/main.c
@@ -62,7 +62,9 @@ static void v4l2_subdev_print_format(struct media_entity *entity,
printf("[%s %ux%u", v4l2_subdev_pixelcode_to_string(format.code),
format.width, format.height);
- ret = v4l2_subdev_get_crop(entity, &rect, pad, which);
+ ret = v4l2_subdev_get_selection(entity, &rect, pad,
+ V4L2_SUBDEV_SEL_TGT_CROP_ACTUAL,
+ which);
if (ret == 0)
printf(" (%u,%u)/%ux%u", rect.left, rect.top,
rect.width, rect.height);
diff --git a/src/v4l2subdev.c b/src/v4l2subdev.c
index 8c1baee..a2ab0c4 100644
--- a/src/v4l2subdev.c
+++ b/src/v4l2subdev.c
@@ -104,48 +104,83 @@ int v4l2_subdev_set_format(struct media_entity *entity,
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_SUBDEV_SEL_TGT_CROP_ACTUAL)
+ 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_SUBDEV_SEL_TGT_CROP_ACTUAL)
+ 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, &crop);
+ ret = ioctl(entity->fd, VIDIOC_SUBDEV_S_CROP, &u.crop);
if (ret < 0)
return -errno;
- *rect = crop.rect;
+ *rect = u.crop.rect;
return 0;
}
@@ -355,30 +390,31 @@ static int set_format(struct media_pad *pad,
return 0;
}
-static int set_crop(struct media_pad *pad, struct v4l2_rect *crop)
+static int set_selection(struct media_pad *pad, unsigned int target,
+ struct v4l2_rect *rect)
{
int ret;
- if (crop->left == -1 || crop->top == -1)
+ if (rect->left == -1 || rect->top == -1)
return 0;
media_dbg(pad->entity->media,
- "Setting up crop rectangle (%u,%u)/%ux%u on pad %s/%u\n",
- crop->left, crop->top, crop->width, crop->height,
+ "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_crop(pad->entity, crop, pad->index,
- V4L2_SUBDEV_FORMAT_ACTIVE);
+ 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 crop rectangle: %s (%d)\n",
+ "Unable to set selection rectangle: %s (%d)\n",
strerror(-ret), ret);
return ret;
}
media_dbg(pad->entity->media,
- "Crop rectangle set: (%u,%u)/%ux%u\n",
- crop->left, crop->top, crop->width, crop->height);
+ "Selection rectangle set: (%u,%u)/%ux%u\n",
+ rect->left, rect->top, rect->width, rect->height);
return 0;
}
@@ -430,7 +466,7 @@ static int v4l2_subdev_parse_setup_format(struct media_device *media,
}
if (pad->flags & MEDIA_PAD_FL_SOURCE) {
- ret = set_crop(pad, &crop);
+ ret = set_selection(pad, V4L2_SUBDEV_SEL_TGT_CROP_ACTUAL, &crop);
if (ret < 0)
return ret;
}
@@ -440,7 +476,7 @@ static int v4l2_subdev_parse_setup_format(struct media_device *media,
return ret;
if (pad->flags & MEDIA_PAD_FL_SINK) {
- ret = set_crop(pad, &crop);
+ ret = set_selection(pad, V4L2_SUBDEV_SEL_TGT_CROP_ACTUAL, &crop);
if (ret < 0)
return ret;
}
diff --git a/src/v4l2subdev.h b/src/v4l2subdev.h
index 1e75f94..5d55482 100644
--- a/src/v4l2subdev.h
+++ b/src/v4l2subdev.h
@@ -88,34 +88,38 @@ int v4l2_subdev_set_format(struct media_entity *entity,
enum v4l2_subdev_format_whence which);
/**
- * @brief Retrieve the crop rectangle on a pad.
+ * @brief Retrieve a selection rectangle on a pad.
* @param entity - subdev-device media entity.
- * @param rect - crop rectangle to be filled.
+ * @param r - rectangle to be filled.
* @param pad - pad number.
+ * @param target - selection target
* @param which - identifier of the format to get.
*
- * Retrieve the current crop rectangleon the @a entity @a pad and store it in
- * the @a rect structure.
+ * Retrieve the @a target selection rectangle on the @a entity @a pad
+ * and store it in the @a rect structure.
*
- * @a which is set to V4L2_SUBDEV_FORMAT_TRY to retrieve the try crop rectangle
- * stored in the file handle, of V4L2_SUBDEV_FORMAT_ACTIVE to retrieve the
- * current active crop rectangle.
+ * @a which is set to V4L2_SUBDEV_FORMAT_TRY to retrieve the try
+ * selection rectangle stored in the file handle, or
+ * V4L2_SUBDEV_FORMAT_ACTIVE to retrieve the current active selection
+ * rectangle.
*
* @return 0 on success, or a negative error code on failure.
*/
-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);
/**
- * @brief Set the crop rectangle on a pad.
+ * @brief Set a selection rectangle on a pad.
* @param entity - subdev-device media entity.
* @param rect - crop rectangle.
* @param pad - pad number.
+ * @param target - selection target
* @param which - identifier of the format to set.
*
- * Set the crop rectangle on the @a entity @a pad to @a rect. The driver is
- * allowed to modify the requested rectangle, in which case @a rect is updated
- * with the modifications.
+ * Set the @a target selection rectangle on the @a entity @a pad to @a
+ * rect. The driver is allowed to modify the requested rectangle, in
+ * which case @a rect is updated with the modifications.
*
* @a which is set to V4L2_SUBDEV_FORMAT_TRY to set the try crop rectangle
* stored in the file handle, of V4L2_SUBDEV_FORMAT_ACTIVE to configure the
@@ -123,8 +127,9 @@ int v4l2_subdev_get_crop(struct media_entity *entity, struct v4l2_rect *rect,
*
* @return 0 on success, or a negative error code on failure.
*/
-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);
/**
* @brief Retrieve the frame interval on a sub-device.
generated by cgit v1.2.3 (git 2.25.1) at 2025-11-04 10:52:55 +0000