On Mon, Apr 15, 2024 at 08:28:30AM +0200, Lynne wrote: > xHE-AAC relies on the same postfilter mechanism > that Opus uses to improve clarity (albeit with a steeper > deemphasis filter, using a z=0.64). > > The code to apply it is identical, it's still just a > simple IIR low-pass filter. This commit makes it possible > to use alternative constants. > > Patch attached. >
> aarch64/opusdsp_init.c | 2 +-
> aarch64/opusdsp_neon.S | 28 +++++-----------------------
> opusdec_celt.c | 4 +++-
> opusdsp.c | 28 ++++++++++++++++++++++++++--
> opusdsp.h | 2 +-
> x86/opusdsp.asm | 9 +++------
> x86/opusdsp_init.c | 2 +-
> 7 files changed, 40 insertions(+), 35 deletions(-)
> 4a533c8a664bd6f0d0dac3775e4bd94050bd0532
> 0001-opusdsp-add-ability-to-modify-deemphasis-constant.patch
> From c4ad107076970a555ed838a75c0343dffe0cad36 Mon Sep 17 00:00:00 2001
> From: Lynne <d...@lynne.ee>
> Date: Mon, 29 Jan 2024 04:31:43 +0100
> Subject: [PATCH] opusdsp: add ability to modify deemphasis constant
seems missing some header entry or other patch
libavcodec/opusdec_celt.c: In function ‘ff_celt_decode_frame’:
libavcodec/opusdec_celt.c:464:51: error: ‘ff_deemph_opus_weights’ undeclared
(first use in this function)
464 |
ff_deemph_opus_weights,
| ^~~~~~~~~~~~~~~~~~~~~~
libavcodec/opusdec_celt.c:464:51: note: each undeclared identifier is reported
only once for each function it appears in
make: *** [ffbuild/common.mak:81: libavcodec/opusdec_celt.o] Error 1
thx
[...]
--
Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
Let us carefully observe those good qualities wherein our enemies excel us
and endeavor to excel them, by avoiding what is faulty, and imitating what
is excellent in them. -- Plutarch
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