GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/dpx_parser.c Lines: 44 47 93.6 %
Date: 2019-11-20 04:07:19 Branches: 31 34 91.2 %

Line Branch Exec Source
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/*
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 * DPX parser
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 * Copyright (c) 2013 Paul B Mahol
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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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 * DPX parser
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 */
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#include "libavutil/bswap.h"
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#include "libavutil/common.h"
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#include "parser.h"
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typedef struct DPXParseContext {
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    ParseContext pc;
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    uint32_t index;
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    uint32_t fsize;
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    uint32_t remaining_size;
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    int is_be;
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} DPXParseContext;
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639
static int dpx_parse(AVCodecParserContext *s, AVCodecContext *avctx,
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                     const uint8_t **poutbuf, int *poutbuf_size,
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                     const uint8_t *buf, int buf_size)
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{
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639
    DPXParseContext *d = s->priv_data;
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639
    uint32_t state = d->pc.state;
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639
    int next = END_NOT_FOUND;
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639
    int i = 0;
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639
    s->pict_type = AV_PICTURE_TYPE_I;
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639
    *poutbuf_size = 0;
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639
    if (buf_size == 0)
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4
        next = 0;
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639
    if (!d->pc.frame_start_found) {
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22
        for (; i < buf_size; i++) {
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20
            state = (state << 8) | buf[i];
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20
            if (state == MKBETAG('S','D','P','X') ||
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                state == MKTAG('S','D','P','X')) {
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5
                d->pc.frame_start_found = 1;
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5
                d->is_be = state == MKBETAG('S','D','P','X');
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5
                d->index = 0;
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5
                break;
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            }
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        }
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7
        d->pc.state = state;
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    } else {
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632
        if (d->remaining_size) {
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438
            i = FFMIN(d->remaining_size, buf_size);
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438
            d->remaining_size -= i;
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438
            if (d->remaining_size)
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433
                goto flush;
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        }
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    }
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786727
    for (; d->pc.frame_start_found && i < buf_size; i++) {
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786529
        d->pc.state = (d->pc.state << 8) | buf[i];
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786529
        d->index++;
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786529
        if (d->index == 17) {
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5
            d->fsize = d->is_be ? d->pc.state : av_bswap32(d->pc.state);
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5
            if (d->fsize <= 1664) {
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                d->pc.frame_start_found = 0;
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                goto flush;
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            }
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5
            if (d->fsize > buf_size - i + 19)
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5
                d->remaining_size = d->fsize - buf_size + i - 19;
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            else
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                i += d->fsize - 19;
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5
            break;
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786524
        } else if (d->index > 17) {
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786444
            if (d->pc.state == MKBETAG('S','D','P','X') ||
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786444
                d->pc.state == MKTAG('S','D','P','X')) {
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3
                next = i - 3;
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3
                break;
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            }
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        }
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    }
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flush:
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639
    if (ff_combine_frame(&d->pc, next, &buf, &buf_size) < 0)
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632
        return buf_size;
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7
    d->pc.frame_start_found = 0;
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106
7
    *poutbuf      = buf;
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7
    *poutbuf_size = buf_size;
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7
    return next;
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}
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AVCodecParser ff_dpx_parser = {
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    .codec_ids      = { AV_CODEC_ID_DPX },
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    .priv_data_size = sizeof(DPXParseContext),
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    .parser_parse   = dpx_parse,
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    .parser_close   = ff_parse_close,
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};