GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/vc1_common.h Lines: 20 20 100.0 %
Date: 2020-10-23 17:01:47 Branches: 20 22 90.9 %

Line Branch Exec Source
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/*
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 * VC-1 and WMV3 decoder
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 * Copyright (c) 2006-2007 Konstantin Shishkov
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 * Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer
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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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#ifndef AVCODEC_VC1_COMMON_H
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#define AVCODEC_VC1_COMMON_H
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#include <stdint.h>
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#include "libavutil/attributes.h"
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#include "internal.h"
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/** Markers used in VC-1 AP frame data */
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//@{
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enum VC1Code {
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    VC1_CODE_RES0       = 0x00000100,
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    VC1_CODE_ENDOFSEQ   = 0x0000010A,
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    VC1_CODE_SLICE,
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    VC1_CODE_FIELD,
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    VC1_CODE_FRAME,
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    VC1_CODE_ENTRYPOINT,
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    VC1_CODE_SEQHDR,
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};
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//@}
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#define IS_MARKER(x) (((x) & ~0xFF) == VC1_CODE_RES0)
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/** Available Profiles */
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//@{
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enum Profile {
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    PROFILE_SIMPLE,
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    PROFILE_MAIN,
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    PROFILE_COMPLEX, ///< TODO: WMV9 specific
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    PROFILE_ADVANCED
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};
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//@}
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/** Find VC-1 marker in buffer
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 * @return position where next marker starts or end of buffer if no marker found
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 */
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1007
static av_always_inline const uint8_t* find_next_marker(const uint8_t *src, const uint8_t *end)
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{
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1007
    if (end - src >= 4) {
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937
        uint32_t mrk = 0xFFFFFFFF;
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        src = avpriv_find_start_code(src, end, &mrk);
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        if (IS_MARKER(mrk))
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            return src - 4;
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    }
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    return end;
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}
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static av_always_inline int vc1_unescape_buffer(const uint8_t *src, int size, uint8_t *dst)
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{
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    int dsize = 0, i;
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    if (size < 4) {
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        for (dsize = 0; dsize < size; dsize++)
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            *dst++ = *src++;
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        return size;
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    }
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    for (i = 0; i < size; i++, src++) {
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        if (src[0] == 3 && i >= 2 && !src[-1] && !src[-2] && i < size-1 && src[1] < 4) {
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            dst[dsize++] = src[1];
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            src++;
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            i++;
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        } else
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            dst[dsize++] = *src;
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    }
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    return dsize;
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}
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#endif /* AVCODEC_VC1_COMMON_H */