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Hi, all, Does Opus need celt_pitch_xcorr' s fixed point version for ARM aarch64 architecture? If yes, which version does Opus prefer: assembly or instrinsics? Thanks, Zhongwei -- IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the informatio...

...he accuracy, can you kindly show me the path? Best Regards, Phil Wang > -----Original Message----- > From: Jean-Marc Valin [mailto:jmvalin at jmvalin.ca] > Sent: Tuesday, December 30, 2014 3:30 AM > To: Phil Wang; opus at xiph.org; Timothy B. Terriberry (tterribe at xiph.org) > Cc: Zhongwei Yao; Yang Zhang; Zhou (Joe) Yu; Steve Bannister > Subject: Re: [opus] [Opus][RFC][FFT][Fixed-Point][NEON] NEON-Optimize > > On 28/12/14 11:04 PM, Phil Wang wrote: > > It requires some extra effort if twiddles and input/output have > > different bit width. Since Opus uses int3...

Hi, I am working on DSP module of Ne10. I see there are fixed-point and floating-point FFT inside Opus. Is fixed-point FFT only a fall back for CPU without VFP? On ARMv7-A and ARMv8-A, benchmark result shows that fixed-point (int32) and floating-point (float32) FFT have similar performance. I guess fixed-point version is not often used on these platforms. Is it worth the effort to NEON-optimize

...int FFT. Is it int32 good enough? Benchmark data shows that FFT using int16 is much faster than FFT using int32. > -----Original Message----- > From: Timothy B. Terriberry [mailto:tterribe at xiph.org] > Sent: Friday, December 26, 2014 6:52 AM > To: Phil Wang; opus at xiph.org > Cc: Zhongwei Yao; Yang Zhang; Zhou (Joe) Yu; Steve Bannister > Subject: Re: [opus] [Opus][RFC][FFT][Fixed-Point][NEON] NEON-Optimize > Fixed-Point FFT? > > Jean-Marc Valin wrote: > > There is definitely some use for a Neon fixed-point FFT. How much > > exactly I'm not sure. Fixed-poi...

Zhongwei Yao wrote: > Hi, all, > > Does Opus need celt_pitch_xcorr? s fixed point version for ARM aarch64 > architecture? If yes, which version does Opus prefer: assembly or > instrinsics? It would be nice to have one. I don't have a lot of experience with aarch64 (I still haven't b...

Viswanath Puttagunta wrote: > What should we do for power-of-2? I really want to avoid putting > runtime checks if nfft is power of 2 in opus_fft_float_neon. Given the tests that had to be disabled for NE10, I suspect we will not really be able to use it for CUSTOM_MODES, which should be the only time nfft is a power of 2. So I'd suggest just disabling the support when CUSTOM_MODES

Jean-Marc Valin wrote: > There is definitely some use for a Neon fixed-point FFT. How much > exactly I'm not sure. Fixed-point is a bit more than just a fall-back Well, we use fixed-point mode by default in Firefox for both Firefox OS and Fennec (Firefox on Android). The reason is that, although there is some NEON-class hardware where float does finally appear to be a little bit

Hi Timothy, It requires some extra effort if twiddles and input/output have different bit width. Since Opus uses int32 for twiddles, we are going to do the same thing. Thanks, Phil Wang -- IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not

On 30 January 2015 at 02:41, Timothy B. Terriberry <tterribe at xiph.org> wrote: > Zhongwei Yao wrote: >> Hi, all, >> >> Does Opus need celt_pitch_xcorr? s fixed point version for ARM aarch64 >> architecture? If yes, which version does Opus prefer: assembly or >> instrinsics? > > It would be nice to have one. I don't have a lot of experience with &g...