Michael Giacomelli da9df96c30 opus: Good-Thomas FFT for the backward MDCT ... Every 48 kHz CELT length is 15 times a power of two and the factors are co-prime, so the inter-stage twiddles -- 73% of the FFT multiplies at N=480 -- vanish. New pfa_fft15 and mdct_postrot_pfa kernels on both cores; accuracy also improves 0.3 to 0.4 dB against opusdec. Modelled: -6.17% ARMv4, -1.82% ARMv5E. Measured: e200v1 42.33 -> 40.10 MHz, Clip+ 29.30 -> 28.24 MHz. Rescheduling these kernels, folded in here, measured a further -0.75% on e200v1 and -0.39% on Clip+. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Change-Id: Ifa4a30d1045e905522828958949954615faa440d		2026-09-26 13:57:35 -04:00
..
codecs	opus: Good-Thomas FFT for the backward MDCT	2026-09-26 13:57:35 -04:00
dsp	dsp: Add missing .type <symbol>, %function to arm asm	2026-09-19 21:18:30 -04:00
metadata	Add "rbfs" prefix to native filesystem functions	2026-09-17 16:22:31 -04:00
test	Add "rbfs" prefix to native filesystem functions	2026-09-17 16:22:31 -04:00
platform.h	firmware: refactor CACHEALIGN_BITS/SIZE defines	2026-03-06 14:49:00 +00:00
rbcodec.make	rbcodec: Force use of -O2 for dsp code	2025-09-06 08:44:32 -04:00
rbcodecconfig-example.h	Enable setting of global output samplerate on certain targets.	2013-07-06 04:22:04 +02:00
rbcodecplatform-unix.h	Add "rbfs" prefix to native filesystem functions	2026-09-17 16:22:31 -04:00
SOURCES	rbcodec dsp: Move dsp_sample_io_configure() to its own file	2022-12-22 17:20:14 -05:00