FFmpeg coverage

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/startcode.c	Lines:	10	10	100.0 %
Date:	2021-04-22 14:24:15	Branches:	8	8	100.0 %


/*
 * Copyright (c) 2003-2010 Michael Niedermayer <michaelni@gmx.at>
 *
 * 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
 */

/**
 * @file
 * Accelerated start code search function for start codes common to
 * MPEG-1/2/4 video, VC-1, H.264/5
 * @author Michael Niedermayer <michaelni@gmx.at>
 */

#include "startcode.h"
#include "config.h"

int ff_startcode_find_candidate_c(const uint8_t *buf, int size)
{
    int i = 0;
#if HAVE_FAST_UNALIGNED
    /* we check i < size instead of i + 3 / 7 because it is
     * simpler and there must be AV_INPUT_BUFFER_PADDING_SIZE
     * bytes at the end.
     */
#if HAVE_FAST_64BIT
    while (i < size &&
            !((~*(const uint64_t *)(buf + i) &
                    (*(const uint64_t *)(buf + i) - 0x0101010101010101ULL)) &
                    0x8080808080808080ULL))
        i += 8;
#else
    while (i < size &&
            !((~*(const uint32_t *)(buf + i) &
                    (*(const uint32_t *)(buf + i) - 0x01010101U)) &
                    0x80808080U))
        i += 4;
#endif
#endif
    for (; i < size; i++)
        if (!buf[i])
            break;
    return i;
}


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
1			/*
2			* Copyright (c) 2003-2010 Michael Niedermayer <michaelni@gmx.at>
3			*
4			* This file is part of FFmpeg.
5			*
6			* FFmpeg is free software; you can redistribute it and/or
7			* modify it under the terms of the GNU Lesser General Public
8			* License as published by the Free Software Foundation; either
9			* version 2.1 of the License, or (at your option) any later version.
10			*
11			* FFmpeg is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14			* Lesser General Public License for more details.
15			*
16			* You should have received a copy of the GNU Lesser General Public
17			* License along with FFmpeg; if not, write to the Free Software
18			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19			*/
20
21			/**
22			* @file
23			* Accelerated start code search function for start codes common to
24			* MPEG-1/2/4 video, VC-1, H.264/5
25			* @author Michael Niedermayer <michaelni@gmx.at>
26			*/
27
28			#include "startcode.h"
29			#include "config.h"
30
31		1207539	int ff_startcode_find_candidate_c(const uint8_t *buf, int size)
32			{
33		1207539	int i = 0;
34			#if HAVE_FAST_UNALIGNED
35			/* we check i < size instead of i + 3 / 7 because it is
36			* simpler and there must be AV_INPUT_BUFFER_PADDING_SIZE
37			* bytes at the end.
38			*/
39			#if HAVE_FAST_64BIT
40	✓✓	21870567	while (i < size &&
41		21846634	!((~(const uint64_t )(buf + i) &
42	✓✓	21846634	((const uint64_t )(buf + i) - 0x0101010101010101ULL)) &
43			0x8080808080808080ULL))
44		20663028	i += 8;
45			#else
46			while (i < size &&
47			!((~(const uint32_t )(buf + i) &
48			((const uint32_t )(buf + i) - 0x01010101U)) &
49			0x80808080U))
50			i += 4;
51			#endif
52			#endif
53	✓✓	5046399	for (; i < size; i++)
54	✓✓	4889096	if (!buf[i])
55		1050236	break;
56		1207539	return i;
57			}