GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/dvd_nav_parser.c Lines: 45 45 100.0 %
Date: 2019-11-18 18:00:01 Branches: 18 23 78.3 %

Line Branch Exec Source
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/*
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 * DVD navigation block parser for FFmpeg
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 * Copyright (c) 2013 The FFmpeg Project
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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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#include "avcodec.h"
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#include "get_bits.h"
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#include "parser.h"
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#define PCI_SIZE  980
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#define DSI_SIZE 1018
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/* parser definition */
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typedef struct DVDNavParseContext {
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    uint32_t     lba;
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    uint8_t      buffer[PCI_SIZE+DSI_SIZE];
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    int          copied;
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} DVDNavParseContext;
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static av_cold int dvd_nav_parse_init(AVCodecParserContext *s)
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{
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    DVDNavParseContext *pc = s->priv_data;
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    pc->lba    = 0xFFFFFFFF;
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    pc->copied = 0;
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    return 0;
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}
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static int dvd_nav_parse(AVCodecParserContext *s,
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                         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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    DVDNavParseContext *pc1 = s->priv_data;
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    int lastPacket          = 0;
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    int valid               = 0;
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    s->pict_type = AV_PICTURE_TYPE_NONE;
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    avctx->time_base.num = 1;
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    avctx->time_base.den = 90000;
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    if (buf && buf_size) {
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        switch(buf[0]) {
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            case 0x00:
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                if (buf_size == PCI_SIZE) {
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                    /* PCI */
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                    uint32_t lba      = AV_RB32(&buf[0x01]);
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                    uint32_t startpts = AV_RB32(&buf[0x0D]);
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                    uint32_t endpts   = AV_RB32(&buf[0x11]);
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                    if (endpts > startpts) {
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1
                        pc1->lba    = lba;
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1
                        s->pts      = (int64_t)startpts;
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1
                        s->duration = endpts - startpts;
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                        memcpy(pc1->buffer, buf, PCI_SIZE);
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1
                        pc1->copied = PCI_SIZE;
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1
                        valid       = 1;
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                    }
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                }
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                break;
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1
            case 0x01:
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                if ((buf_size == DSI_SIZE) && (pc1->copied == PCI_SIZE)) {
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                    /* DSI */
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1
                    uint32_t lba = AV_RB32(&buf[0x05]);
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                    if (lba == pc1->lba) {
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                        memcpy(pc1->buffer + pc1->copied, buf, DSI_SIZE);
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                        lastPacket  = 1;
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1
                        valid       = 1;
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                    }
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                }
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1
                break;
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        }
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1
    }
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    if (!valid || lastPacket) {
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        pc1->copied = 0;
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        pc1->lba    = 0xFFFFFFFF;
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    }
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    if (lastPacket) {
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1
        *poutbuf      = pc1->buffer;
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1
        *poutbuf_size = sizeof(pc1->buffer);
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    } else {
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        *poutbuf      = NULL;
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        *poutbuf_size = 0;
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    }
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    return buf_size;
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}
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AVCodecParser ff_dvd_nav_parser = {
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    .codec_ids      = { AV_CODEC_ID_DVD_NAV },
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    .priv_data_size = sizeof(DVDNavParseContext),
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    .parser_init    = dvd_nav_parse_init,
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    .parser_parse   = dvd_nav_parse,
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};