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* Saturate additions in getEnvSfbEnergy in SBR encodingMartin Storsjo2023-11-102-4/+4
| | | | | | | | | | This avoids wraparounds, which can trigger failed asserts with some inputs. This fixes https://github.com/mstorsjo/fdk-aac/issues/158. The implementation of saturated addition loses the contents of the lowest bit though, thus this change affects the output - but the change is said to be acceptable.
* Add a script for doing very rudimentary regression testingMartin Storsjo2023-10-063-0/+32
This is expected to fail if the encoder is updated in a way that changes its output; in such cases, the test references need to be updated.