libcamera: ipu3: imgu: Filter resolutions < IF_CROP_MAX
As reported in https://bugs.libcamera.org/show_bug.cgi?id=32
allowing resolutions < IF_CROP_MAX leads to a not manageable number
configurations to be tested, slowing down the ImgU pipe configuration
to a point which is not acceptable for production devices.
Filter all resolutions < IF_CROP_MAX to maintain the run-time complexity
acceptable and remove the safety check that was meant to avoid overflows
when computing the IF rectangle sizes.
Bug: https://bugs.libcamera.org/show_bug.cgi?id=32
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Hirokazu Honda <hiroh@chromium.org>
Reviewed-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>
diff --git a/src/libcamera/pipeline/ipu3/imgu.cpp b/src/libcamera/pipeline/ipu3/imgu.cpp
index acc625a..f25f14a 100644
--- a/src/libcamera/pipeline/ipu3/imgu.cpp
+++ b/src/libcamera/pipeline/ipu3/imgu.cpp
@@ -392,6 +392,17 @@
LOG(IPU3, Debug) << "vf: " << pipe->viewfinder.toString();
const Size &in = pipe->input;
+
+ /*
+ * \todo Filter out all resolutions < IF_CROP_MAX.
+ * See https://bugs.libcamera.org/show_bug.cgi?id=32
+ */
+ if (in.width < IF_CROP_MAX_W || in.height < IF_CROP_MAX_H) {
+ LOG(IPU3, Error) << "Input resolution " << in.toString()
+ << " not supported";
+ return {};
+ }
+
Size gdc = calculateGDC(pipe);
float bdsSF = static_cast<float>(in.width) / gdc.width;
@@ -400,10 +411,8 @@
/* Populate the configurations vector by scaling width and height. */
unsigned int ifWidth = utils::alignUp(in.width, IF_ALIGN_W);
unsigned int ifHeight = utils::alignUp(in.height, IF_ALIGN_H);
- unsigned int minIfWidth = std::min(IF_ALIGN_W,
- in.width - IF_CROP_MAX_W);
- unsigned int minIfHeight = std::min(IF_ALIGN_H,
- in.height - IF_CROP_MAX_H);
+ unsigned int minIfWidth = in.width - IF_CROP_MAX_W;
+ unsigned int minIfHeight = in.height - IF_CROP_MAX_H;
while (ifWidth >= minIfWidth) {
while (ifHeight >= minIfHeight) {
Size iif{ ifWidth, ifHeight };
@@ -417,8 +426,8 @@
/* Repeat search by scaling width first. */
ifWidth = utils::alignUp(in.width, IF_ALIGN_W);
ifHeight = utils::alignUp(in.height, IF_ALIGN_H);
- minIfWidth = std::min(IF_ALIGN_W, in.width - IF_CROP_MAX_W);
- minIfHeight = std::min(IF_ALIGN_H, in.height - IF_CROP_MAX_H);
+ minIfWidth = in.width - IF_CROP_MAX_W;
+ minIfHeight = in.height - IF_CROP_MAX_H;
while (ifHeight >= minIfHeight) {
/*
* \todo This procedure is probably broken: