I believe that the SSE/AVX hardware engine only works with aligned buffers.
That said, I also believe that macOS already aligns buffers, even with simple malloc(), although I might be wrong. At the very least, there is surely a CoreAudio memory allocation function that aligns buffers for audio, so that Apple can use SSE/AVX hardware acceleration on audio buffers. Stefan, have you tried your work on macOS? Brian Willoughby On Mar 16, 2025, at 11:48 AM, Martijn van Beurden wrote: > Hi, > > Please explain why you need aligned buffers. > > Kind regards, Martijn van Beurden > > Op zo 16 mrt 2025 om 01:36 schreef Stefan Oltmanns: >> >> Hello, >> >> I want to process the output from libflac with SSE/AVX. Unfortunately it >> seems that libflac always allocates the output buffer itself and there >> is no way to provide a buffer by the application. >> From my understanding of the code flac is using it's own functions in >> share/alloc.h for allocations, and those use plain malloc. I assume the >> only way to force aligned output buffers is to modify the alloc.h and >> then link libflac statically and not use a system provided version? >> >> I'm also open for any other flac decoding library (written in C or with >> C header) that has the following features: >> >> -Support seeking (with fast seeking using seektables if available) >> -Support Ogg FLAC >> -Fast decoding >> -Should be able to handle *very long* flac files (like 2^40 samples). >> libavcodec/ffmpeg fails at this, as some internal counter overflows >> >> Best regards >> Stefan _______________________________________________ flac-dev mailing list flac-dev@xiph.org http://lists.xiph.org/mailman/listinfo/flac-dev
