GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/dca_core_bsf.c Lines: 15 15 100.0 %
Date: 2019-11-18 18:00:01 Branches: 5 8 62.5 %

Line Branch Exec Source
1
/*
2
 * Copyright (c) 2016 Paul B Mahol
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
#include "avcodec.h"
22
#include "bsf.h"
23
#include "bytestream.h"
24
#include "dca_syncwords.h"
25
#include "libavutil/mem.h"
26
27
2344
static int dca_core_filter(AVBSFContext *ctx, AVPacket *pkt)
28
{
29
    GetByteContext gb;
30
    uint32_t syncword;
31
2344
    int core_size = 0, ret;
32
33
2344
    ret = ff_bsf_get_packet_ref(ctx, pkt);
34
2344
    if (ret < 0)
35
1172
        return ret;
36
37
1172
    bytestream2_init(&gb, pkt->data, pkt->size);
38
1172
    syncword = bytestream2_get_be32(&gb);
39
1172
    bytestream2_skip(&gb, 1);
40
41
1172
    switch (syncword) {
42
1172
    case DCA_SYNCWORD_CORE_BE:
43
1172
        core_size = ((bytestream2_get_be24(&gb) >> 4) & 0x3fff) + 1;
44
1172
        break;
45
    }
46
47

1172
    if (core_size > 0 && core_size <= pkt->size) {
48
1172
        pkt->size = core_size;
49
    }
50
51
1172
    return 0;
52
}
53
54
static const enum AVCodecID codec_ids[] = {
55
    AV_CODEC_ID_DTS, AV_CODEC_ID_NONE,
56
};
57
58
const AVBitStreamFilter ff_dca_core_bsf = {
59
    .name      = "dca_core",
60
    .filter    = dca_core_filter,
61
    .codec_ids = codec_ids,
62
};