gx
dcecd42de4
Snapshot FFmpeg n7.1 (release tag) с применённым patch'ем для cuframes input format. Используется как FFMPEG_REPO_OVERRIDE в NickM-27/FFmpeg-Builds fork для статической сборки patched binary под Frigate (Debian 12 / glibc 2.36). Apply changes: + libavformat/cuframesdec.c (новый — реализация демуксера) M libavformat/Makefile (CONFIG_CUFRAMES_DEMUXER target) M libavformat/allformats.c (extern declaration) M configure (--enable-libcuframes option + dep check) Patch source: https://git.goldix.org/gx/cuframes (filter/ffmpeg-7.1-cuframes-demuxer.patch) History сброшена (snapshot вместо fork) потому что upstream shallow clone не позволял push в gitea. Полная история FFmpeg — на github.com/FFmpeg/FFmpeg n7.1.
59 lines
1.8 KiB
C
59 lines
1.8 KiB
C
/*
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* Copyright (c) 2003-2010 Michael Niedermayer <michaelni@gmx.at>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* Accelerated start code search function for start codes common to
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* MPEG-1/2/4 video, VC-1, H.264/5
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* @author Michael Niedermayer <michaelni@gmx.at>
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*/
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#include "libavutil/intreadwrite.h"
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#include "startcode.h"
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#include "config.h"
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int ff_startcode_find_candidate_c(const uint8_t *buf, int size)
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{
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int i = 0;
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#if HAVE_FAST_UNALIGNED
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/* we check i < size instead of i + 3 / 7 because it is
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* simpler and there must be AV_INPUT_BUFFER_PADDING_SIZE
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* bytes at the end.
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*/
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#if HAVE_FAST_64BIT
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while (i < size &&
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!((~AV_RN64(buf + i) &
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(AV_RN64(buf + i) - 0x0101010101010101ULL)) &
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0x8080808080808080ULL))
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i += 8;
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#else
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while (i < size &&
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!((~AV_RN32(buf + i) &
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(AV_RN32(buf + i) - 0x01010101U)) &
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0x80808080U))
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i += 4;
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#endif
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#endif
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for (; i < size; i++)
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if (!buf[i])
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break;
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return i;
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}
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