FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/eac3_core_bsf.c
Date: 2021-09-23 20:34:37
Exec Total Coverage
Lines: 12 32 37.5%
Branches: 6 22 27.3%

Line Branch Exec Source
1 /*
2 * Copyright (c) 2018 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 "bsf.h"
22 #include "bsf_internal.h"
23 #include "get_bits.h"
24 #include "ac3_parser_internal.h"
25
26 314 static int eac3_core_filter(AVBSFContext *ctx, AVPacket *pkt)
27 {
28 AC3HeaderInfo hdr;
29 GetBitContext gbc;
30 int ret;
31
32 314 ret = ff_bsf_get_packet_ref(ctx, pkt);
33
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314 if (ret < 0)
34 157 return ret;
35 157 ret = init_get_bits8(&gbc, pkt->data, pkt->size);
36
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157 if (ret < 0)
37 goto fail;
38
39 157 ret = ff_ac3_parse_header(&gbc, &hdr);
40
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157 if (ret < 0) {
41 ret = AVERROR_INVALIDDATA;
42 goto fail;
43 }
44
45
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157 if (hdr.frame_type == EAC3_FRAME_TYPE_INDEPENDENT ||
46
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157 hdr.frame_type == EAC3_FRAME_TYPE_AC3_CONVERT) {
47 157 pkt->size = FFMIN(hdr.frame_size, pkt->size);
48 } else if (hdr.frame_type == EAC3_FRAME_TYPE_DEPENDENT && pkt->size > hdr.frame_size) {
49 AC3HeaderInfo hdr2;
50
51 ret = init_get_bits8(&gbc, pkt->data + hdr.frame_size, pkt->size - hdr.frame_size);
52 if (ret < 0)
53 goto fail;
54
55 ret = ff_ac3_parse_header(&gbc, &hdr2);
56 if (ret < 0) {
57 ret = AVERROR_INVALIDDATA;
58 goto fail;
59 }
60
61 if (hdr2.frame_type == EAC3_FRAME_TYPE_INDEPENDENT ||
62 hdr2.frame_type == EAC3_FRAME_TYPE_AC3_CONVERT) {
63 pkt->size -= hdr.frame_size;
64 pkt->data += hdr.frame_size;
65 } else {
66 pkt->size = 0;
67 }
68 } else {
69 pkt->size = 0;
70 }
71
72 157 return 0;
73 fail:
74 av_packet_unref(pkt);
75 return ret;
76 }
77
78 static const enum AVCodecID codec_ids[] = {
79 AV_CODEC_ID_EAC3, AV_CODEC_ID_NONE,
80 };
81
82 const AVBitStreamFilter ff_eac3_core_bsf = {
83 .name = "eac3_core",
84 .filter = eac3_core_filter,
85 .codec_ids = codec_ids,
86 };
87