Feb 8, 2020, 23:26 by d...@lynne.ee: > Patch attached. Commit message: > > Required minimal changes to the code so made sense to implement. > FFT and MDCT tested, the output of both was properly rounded. > Fun fact: the non-power-of-two fixed-point FFT and MDCT are the fastest ever > non-power-of-two fixed-point FFT and MDCT written. > This can replace the power of two integer MDCTs in aac and ac3 if the > MIPS optimizations are ported across. > Unfortunately the ac3 encoder uses a 16-bit fixed point forward transform, > unlike the encoder which uses a 32bit inverse transform, so some modifications > might be required there. > > I am somewhat unsure that choosing a float as a scale value was a good > decision as it still leaves some small amount of possible float platform > to platform mismatch. However, an AVRational is somewhat too cumbersome > and doesn't allow for encoders to use the same scaling code for floats. >
Pushed. Maybe I'll actually do some work on SIMD this weekend. _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
