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[media] s5p-fimc: update checking scaling ratio range 

Horizontal and vertical scaling range are according to the following equations.
If (SRC_Width >= 64 x DST_Width) { Exit(-1);  /* Out of Horizontal scale range}
If (SRC_Height >= 64 x DST_Height) { Exit(-1);  /* Out of Vertical scale range}

fimc_check_scaler_ratio() is used to check if horizontal and vertical
scale range are valid or not. To use fimc_check_scaler_ratio,
source and destination format should be set by VIDIOC_S_FMT.
And in case of scaling up, it doesn't have to check the scale range.

Reviewed-by: Jonghun Han <jonghun.han@samsung.com>
Signed-off-by: Hyunwoong Kim <khw0178.kim@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hyunwoong Kim 2010-12-28 22:12:43 -03:00 committed by Mauro Carvalho Chehab
parent 70f66ea2aa
commit 1b09f292eb
3 changed files with 44 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/media/video/s5p-fimc/fimc-capture.c
View File

@ -787,7 +787,9 @@ static int fimc_cap_s_crop(struct file *file, void *fh,
f = &ctx->s_frame;
/* Check for the pixel scaling ratio when cropping input image. */
ret = fimc_check_scaler_ratio(&cr->c, &ctx->d_frame);
ret = fimc_check_scaler_ratio(cr->c.width, cr->c.height,
ctx->d_frame.width, ctx->d_frame.height,
ctx->rotation);
if (ret) {
v4l2_err(&fimc->vid_cap.v4l2_dev, "Out of the scaler range");
return ret;

59
drivers/media/video/s5p-fimc/fimc-core.c
View File

@ -200,23 +200,20 @@ static struct v4l2_queryctrl *get_ctrl(int id)
return NULL;
}
int fimc_check_scaler_ratio(struct v4l2_rect *r, struct fimc_frame *f)
int fimc_check_scaler_ratio(int sw, int sh, int dw, int dh, int rot)
{
if (r->width > f->width) {
if (f->width > (r->width * SCALER_MAX_HRATIO))
return -EINVAL;
int tx, ty;
if (rot == 90 || rot == 270) {
ty = dw;
tx = dh;
} else {
if ((f->width * SCALER_MAX_HRATIO) < r->width)
return -EINVAL;
tx = dw;
ty = dh;
}
if (r->height > f->height) {
if (f->height > (r->height * SCALER_MAX_VRATIO))
return -EINVAL;
} else {
if ((f->height * SCALER_MAX_VRATIO) < r->height)
return -EINVAL;
}
if ((sw >= SCALER_MAX_HRATIO * tx) || (sh >= SCALER_MAX_VRATIO * ty))
return -EINVAL;
return 0;
}
@ -1065,6 +1062,7 @@ int fimc_s_ctrl(struct fimc_ctx *ctx, struct v4l2_control *ctrl)
struct samsung_fimc_variant *variant = ctx->fimc_dev->variant;
struct fimc_dev *fimc = ctx->fimc_dev;
unsigned long flags;
int ret = 0;
spin_lock_irqsave(&ctx->slock, flags);
@ -1084,6 +1082,20 @@ int fimc_s_ctrl(struct fimc_ctx *ctx, struct v4l2_control *ctrl)
break;
case V4L2_CID_ROTATE:
if (!(~ctx->state & (FIMC_DST_FMT | FIMC_SRC_FMT))) {
ret = fimc_check_scaler_ratio(ctx->s_frame.width,
ctx->s_frame.height,
ctx->d_frame.width,
ctx->d_frame.height,
ctrl->value);
if (ret) {
v4l2_err(&fimc->m2m.v4l2_dev,
"Out of scaler range");
spin_unlock_irqrestore(&ctx->slock, flags);
return -EINVAL;
}
}
/* Check for the output rotator availability */
if ((ctrl->value == 90 || ctrl->value == 270) &&
(ctx->in_path == FIMC_DMA && !variant->has_out_rot)) {
@ -1232,18 +1244,27 @@ static int fimc_m2m_s_crop(struct file *file, void *fh, struct v4l2_crop *cr)
&ctx->s_frame : &ctx->d_frame;
spin_lock_irqsave(&ctx->slock, flags);
if (~ctx->state & (FIMC_SRC_FMT | FIMC_DST_FMT)) {
/* Check to see if scaling ratio is within supported range */
if (cr->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
ret = fimc_check_scaler_ratio(&cr->c, &ctx->d_frame);
else
ret = fimc_check_scaler_ratio(&cr->c, &ctx->s_frame);
/* Check to see if scaling ratio is within supported range */
if (!(~ctx->state & (FIMC_DST_FMT | FIMC_SRC_FMT))) {
if (cr->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
ret = fimc_check_scaler_ratio(cr->c.width, cr->c.height,
ctx->d_frame.width,
ctx->d_frame.height,
ctx->rotation);
} else {
ret = fimc_check_scaler_ratio(ctx->s_frame.width,
ctx->s_frame.height,
cr->c.width, cr->c.height,
ctx->rotation);
}
if (ret) {
v4l2_err(&fimc->m2m.v4l2_dev, "Out of scaler range");
spin_unlock_irqrestore(&ctx->slock, flags);
return -EINVAL;
}
}
ctx->state |= FIMC_PARAMS;
f->offs_h = cr->c.left;

2
drivers/media/video/s5p-fimc/fimc-core.h
View File

@ -611,7 +611,7 @@ struct fimc_fmt *find_format(struct v4l2_format *f, unsigned int mask);
struct fimc_fmt *find_mbus_format(struct v4l2_mbus_framefmt *f,
unsigned int mask);
int fimc_check_scaler_ratio(struct v4l2_rect *r, struct fimc_frame *f);
int fimc_check_scaler_ratio(int sw, int sh, int dw, int dh, int rot);
int fimc_set_scaler_info(struct fimc_ctx *ctx);
int fimc_prepare_config(struct fimc_ctx *ctx, u32 flags);
int fimc_prepare_addr(struct fimc_ctx *ctx, struct vb2_buffer *vb,