[v6,29/47] ipa: libipa: agc: Fix multiplication type
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Message ID 20260820151918.2382337-30-barnabas.pocze@ideasonboard.com
State New
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Series
  • ipa: libipa: agc rework
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Commit Message

Barnabás Pőcze Aug. 20, 2026, 3:18 p.m. UTC 
The type of `frameSize` is `uint64_t`, but it is assigned the result
of a 32-bit multiplication. So make one of the terms a 64-bit integer
so that the result will be actually 64-bit.

Furthermore, also adjust the calculation to do the multiplication first
just to be as accurate as possible. No wraparound will happen as long
as the frame size is less than about 16.7 TiB.

Signed-off-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com>
---
 src/ipa/libipa/agc.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Patch
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diff --git a/src/ipa/libipa/agc.cpp b/src/ipa/libipa/agc.cpp
index 34cead8de1..23c7257dcb 100644
--- a/src/ipa/libipa/agc.cpp
+++ b/src/ipa/libipa/agc.cpp
@@ -328,8 +328,8 @@  int AgcAlgorithm::configure(agc::Session &session, agc::ActiveState &state,
 
 	std::array<int64_t, 3> frameDurations;
 	for (unsigned int i = 0; i < frameHeights.size(); ++i) {
-		uint64_t frameSize = lineLength * frameHeights[i];
-		frameDurations[i] = frameSize / (config.sensorInfo.pixelRate / 1000000U);
+		uint64_t frameSize = static_cast<uint64_t>(lineLength) * frameHeights[i];
+		frameDurations[i] = frameSize * 1000000U / config.sensorInfo.pixelRate;
 	}
 
 	/*