GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/startcode.c Lines: 10 10 100.0 %
Date: 2020-08-14 10:39:37 Branches: 8 8 100.0 %

Line Branch Exec Source
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/*
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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 "startcode.h"
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#include "config.h"
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1204745
int ff_startcode_find_candidate_c(const uint8_t *buf, int size)
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{
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1204745
    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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21517523
    while (i < size &&
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21493600
            !((~*(const uint64_t *)(buf + i) &
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21493600
                    (*(const uint64_t *)(buf + i) - 0x0101010101010101ULL)) &
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                    0x8080808080808080ULL))
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20312778
        i += 8;
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#else
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    while (i < size &&
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            !((~*(const uint32_t *)(buf + i) &
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                    (*(const uint32_t *)(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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5035113
    for (; i < size; i++)
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4877914
        if (!buf[i])
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1047546
            break;
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1204745
    return i;
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}