From 36d22d82aa202bb199967e9512281e9a53db42c9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 21:33:14 +0200 Subject: Adding upstream version 115.7.0esr. Signed-off-by: Daniel Baumann --- media/ffvpx/libavcodec/xiph.c | 65 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 65 insertions(+) create mode 100644 media/ffvpx/libavcodec/xiph.c (limited to 'media/ffvpx/libavcodec/xiph.c') diff --git a/media/ffvpx/libavcodec/xiph.c b/media/ffvpx/libavcodec/xiph.c new file mode 100644 index 0000000000..218b0813e9 --- /dev/null +++ b/media/ffvpx/libavcodec/xiph.c @@ -0,0 +1,65 @@ +/* + * Copyright (C) 2007 The FFmpeg Project + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include +#include "libavutil/error.h" +#include "libavutil/intreadwrite.h" +#include "xiph.h" + +int avpriv_split_xiph_headers(const uint8_t *extradata, int extradata_size, + int first_header_size, const uint8_t *header_start[3], + int header_len[3]) +{ + int i; + + if (extradata_size >= 6 && AV_RB16(extradata) == first_header_size) { + int overall_len = 6; + for (i=0; i<3; i++) { + header_len[i] = AV_RB16(extradata); + extradata += 2; + header_start[i] = extradata; + extradata += header_len[i]; + if (overall_len > extradata_size - header_len[i]) + return AVERROR_INVALIDDATA; + overall_len += header_len[i]; + } + } else if (extradata_size >= 3 && extradata_size < INT_MAX - 0x1ff && extradata[0] == 2) { + int overall_len = 3; + extradata++; + for (i=0; i<2; i++, extradata++) { + header_len[i] = 0; + for (; overall_len < extradata_size && *extradata==0xff; extradata++) { + header_len[i] += 0xff; + overall_len += 0xff + 1; + } + header_len[i] += *extradata; + overall_len += *extradata; + if (overall_len > extradata_size) + return AVERROR_INVALIDDATA; + } + header_len[2] = extradata_size - overall_len; + header_start[0] = extradata; + header_start[1] = header_start[0] + header_len[0]; + header_start[2] = header_start[1] + header_len[1]; + } else { + return -1; + } + return 0; +} -- cgit v1.2.3