This patch allows new video drivers to work correctly with applications that
use the old-style crop API. The old crop ioctl is emulated by using selection
callbacks.
Signed-off-by: Tomasz Stanislawski <t.stanislaws@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
drivers/media/video/v4l2-ioctl.c | 86 ++++++++++++++++++++++++++++++++-----
1 files changed, 74 insertions(+), 12 deletions(-)
diff --git a/drivers/media/video/v4l2-ioctl.c b/drivers/media/video/v4l2-ioctl.c
index 6e02b45..bb99c71 100644
--- a/drivers/media/video/v4l2-ioctl.c
+++ b/drivers/media/video/v4l2-ioctl.c
@@ -1696,11 +1696,29 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_crop *p = arg;
- if (!ops->vidioc_g_crop)
- break;
-
dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
- ret = ops->vidioc_g_crop(file, fh, p);
+
+ if (ops->vidioc_g_crop) {
+ ret = ops->vidioc_g_crop(file, fh, p);
+ } else if (ops->vidioc_g_selection) {
+ /* simulate capture crop using selection api */
+ struct v4l2_selection s = {
+ .type = p->type,
+ };
+
+ /* crop means compose for output devices */
+ if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
+ s.target = V4L2_SEL_COMPOSE_ACTIVE;
+ else
+ s.target = V4L2_SEL_CROP_ACTIVE;
+
+ ret = ops->vidioc_g_selection(file, fh, &s);
+
+ /* copying results to old structure on success */
+ if (!ret)
+ p->c = s.r;
+ }
+
if (!ret)
dbgrect(vfd, "", &p->c);
break;
@@ -1709,11 +1727,26 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_crop *p = arg;
- if (!ops->vidioc_s_crop)
- break;
dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
dbgrect(vfd, "", &p->c);
- ret = ops->vidioc_s_crop(file, fh, p);
+
+ if (ops->vidioc_s_crop) {
+ ret = ops->vidioc_s_crop(file, fh, p);
+ } else if (ops->vidioc_s_selection) {
+ /* simulate capture crop using selection api */
+ struct v4l2_selection s = {
+ .type = p->type,
+ .r = p->c,
+ };
+
+ /* crop means compose for output devices */
+ if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
+ s.target = V4L2_SEL_COMPOSE_ACTIVE;
+ else
+ s.target = V4L2_SEL_CROP_ACTIVE;
+
+ ret = ops->vidioc_s_selection(file, fh, &s);
+ }
break;
}
case VIDIOC_G_SELECTION:
@@ -1746,12 +1779,41 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_cropcap *p = arg;
- /*FIXME: Should also show v4l2_fract pixelaspect */
- if (!ops->vidioc_cropcap)
- break;
-
dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
- ret = ops->vidioc_cropcap(file, fh, p);
+ if (ops->vidioc_cropcap) {
+ ret = ops->vidioc_cropcap(file, fh, p);
+ } else
+ if (ops->vidioc_g_selection) {
+ struct v4l2_selection s = { .type = p->type };
+
+ /* obtaining bounds */
+ if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
+ s.target = V4L2_SEL_COMPOSE_BOUNDS;
+ else
+ s.target = V4L2_SEL_CROP_BOUNDS;
+
+ ret = ops->vidioc_g_selection(file, fh, &s);
+ if (ret)
+ break;
+ p->bounds = s.r;
+
+ /* obtaining defrect */
+ if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
+ s.target = V4L2_SEL_COMPOSE_DEFAULT;
+ else
+ s.target = V4L2_SEL_CROP_DEFAULT;
+
+ ret = ops->vidioc_g_selection(file, fh, &s);
+ if (ret)
+ break;
+ p->defrect = s.r;
+
+ /* setting trivial pixelaspect */
+ p->pixelaspect.numerator = 1;
+ p->pixelaspect.denominator = 1;
+ }
+
+ /*FIXME: Should also show v4l2_fract pixelaspect */
if (!ret) {
dbgrect(vfd, "bounds ", &p->bounds);
dbgrect(vfd, "defrect ", &p->defrect);
--
1.7.6
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