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[72.10.135.141]) by smtp.gmail.com with ESMTPSA id cr24-20020a05622a429800b004100c132990sm2915966qtb.44.2023.09.03.07.49.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 03 Sep 2023 07:49:29 -0700 (PDT) From: Maxim Cournoyer References: <3e0b2b90b037404da7bf9be8932f9b0d69c1a39a.1693537692.git.maxim.cournoyer@gmail.com> <4fa4754ecb68e0e9d7bc72c44229bcc404a5525a.camel@gmail.com> <878r9p1gxj.fsf@gmail.com> Date: Sun, 03 Sep 2023 10:49:28 -0400 In-Reply-To: (Liliana Marie Prikler's message of "Sat, 02 Sep 2023 06:59:29 +0200") Message-ID: <87o7ijuxaf.fsf@gmail.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: guix-patches@gnu.org List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: guix-patches-bounces+larch=yhetil.org@gnu.org Sender: guix-patches-bounces+larch=yhetil.org@gnu.org X-Migadu-Country: US X-Migadu-Flow: FLOW_IN X-Migadu-Scanner: mx2.migadu.com X-Spam-Score: -5.09 X-Migadu-Queue-Id: EF71456A41 X-Migadu-Spam-Score: -5.09 X-TUID: ghE9Im9yMGc4 Hi Liliana, Liliana Marie Prikler writes: [...] >> It's not possible to build svt-hevc without those extensions: they >> are depended upon.=C2=A0 Because it can't be used, I think it makes sense >> to not leave dead code (since it's not going to be resolved in the >> future and re-enabled). > Looking at the code of svt-hevc, these additional libraries appear to > be just adding versions of the methods already implemented in C. > > You might want to look into commenting the following lines > > add_subdirectory(ASM_SSE2) > add_subdirectory(ASM_SSSE3) > add_subdirectory(ASM_SSE4_1) > add_subdirectory(ASM_AVX2) >From my understanding and per upstream comments linked earlier, svt-hevc is all about implementing some video codec using latest Intel technologies. The project synopsis on Github reads: --8<---------------cut here---------------start------------->8--- SVT HEVC encoder. Scalable Video Technology (SVT) is a software-based video coding technology that is highly optimized for Intel=C2=AE Xeon=C2=AE proce= ssors --8<---------------cut here---------------end--------------->8--- So I don't think it can be made to work (at least usefully) on older processors, and it's explicitly an upstream non-goal. [...] > Well, I'd rather keep the svt-hevc issue above open than concluding it > cannot be done, but otherwise, yes, LGTM. I think it's safe to conclude that it cannot be done, given what I've written above. Does it make sense? --=20 Thanks, Maxim