FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/hca.c
Date: 2024-11-20 23:03:26
Exec Total Coverage
Lines: 3 58 5.2%
Functions: 1 3 33.3%
Branches: 1 20 5.0%
Line Branch Exec Source
1 /*
2 * HCA demuxer
3 * Copyright (c) 2020 Paul B Mahol
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "libavutil/opt.h"
23 #include "libavutil/intreadwrite.h"
24 #include "libavcodec/bytestream.h"
25
26 #include "avformat.h"
27 #include "demux.h"
28 #include "internal.h"
29
30 #define HCA_MASK 0x7f7f7f7f
31
32 typedef struct HCADemuxContext {
33 AVClass *class;
34 int64_t keyl;
35 int64_t keyh;
36 int subkey;
37 } HCADemuxContext;
38
39 7186 static int hca_probe(const AVProbeData *p)
40 {
41
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 7186 if ((AV_RL32(p->buf) & HCA_MASK) != MKTAG('H', 'C', 'A', 0))
42 7186 return 0;
43
44 ✗ if ((AV_RL32(p->buf + 8) & HCA_MASK) != MKTAG('f', 'm', 't', 0))
45 ✗ return 0;
46
47 ✗ return AVPROBE_SCORE_MAX / 3;
48 }
49
50 ✗ static int hca_read_header(AVFormatContext *s)
51 {
52 ✗ HCADemuxContext *hca = s->priv_data;
53 AVCodecParameters *par;
54 GetByteContext gb;
55 ✗ AVIOContext *pb = s->pb;
56 AVStream *st;
57 uint32_t chunk;
58 uint16_t version;
59 uint32_t block_count;
60 uint16_t block_size, data_offset;
61 int ret;
62
63 ✗ avio_skip(pb, 4);
64 ✗ version = avio_rb16(pb);
65
66 ✗ data_offset = avio_rb16(pb);
67 ✗ if (data_offset <= 8)
68 ✗ return AVERROR_INVALIDDATA;
69
70 ✗ st = avformat_new_stream(s, NULL);
71 ✗ if (!st)
72 ✗ return AVERROR(ENOMEM);
73
74 ✗ par = st->codecpar;
75 ✗ ret = ff_alloc_extradata(par, data_offset + 10);
76 ✗ if (ret < 0)
77 ✗ return ret;
78
79 ✗ ret = avio_read(pb, par->extradata + 8, par->extradata_size - 8 - 10);
80 ✗ if (ret < par->extradata_size - 8 - 10)
81 ✗ return AVERROR(EIO);
82 ✗ AV_WL32(par->extradata, MKTAG('H', 'C', 'A', 0));
83 ✗ AV_WB16(par->extradata + 4, version);
84 ✗ AV_WB16(par->extradata + 6, data_offset);
85 ✗ AV_WB32(par->extradata + par->extradata_size - 10, hca->keyh);
86 ✗ AV_WB32(par->extradata + par->extradata_size - 6, hca->keyl);
87 ✗ AV_WB16(par->extradata + par->extradata_size - 2, hca->subkey);
88
89 ✗ bytestream2_init(&gb, par->extradata + 8, par->extradata_size - 8);
90
91 ✗ if ((bytestream2_get_le32(&gb) & HCA_MASK) != MKTAG('f', 'm', 't', 0))
92 ✗ return AVERROR_INVALIDDATA;
93
94 ✗ par->codec_type = AVMEDIA_TYPE_AUDIO;
95 ✗ par->codec_id = AV_CODEC_ID_HCA;
96 ✗ par->codec_tag = 0;
97 ✗ st->codecpar->ch_layout.nb_channels = bytestream2_get_byte(&gb);
98 ✗ par->sample_rate = bytestream2_get_be24(&gb);
99 ✗ block_count = bytestream2_get_be32(&gb);
100 ✗ bytestream2_skip(&gb, 4);
101 ✗ chunk = bytestream2_get_le32(&gb) & HCA_MASK;
102 ✗ if (chunk == MKTAG('c', 'o', 'm', 'p')) {
103 ✗ block_size = bytestream2_get_be16(&gb);
104 ✗ } else if (chunk == MKTAG('d', 'e', 'c', 0)) {
105 ✗ block_size = bytestream2_get_be16(&gb);
106 } else {
107 ✗ return AVERROR_INVALIDDATA;
108 }
109
110 ✗ if (block_size < 8)
111 ✗ return AVERROR_INVALIDDATA;
112 ✗ par->block_align = block_size;
113 ✗ st->duration = 1024 * block_count;
114
115 ✗ avio_seek(pb, data_offset, SEEK_SET);
116 ✗ avpriv_set_pts_info(st, 64, 1, par->sample_rate);
117
118 ✗ return 0;
119 }
120
121 ✗ static int hca_read_packet(AVFormatContext *s, AVPacket *pkt)
122 {
123 ✗ AVCodecParameters *par = s->streams[0]->codecpar;
124 int ret;
125
126 ✗ ret = av_get_packet(s->pb, pkt, par->block_align);
127 ✗ pkt->duration = 1024;
128 ✗ return ret;
129 }
130
131 #define OFFSET(x) offsetof(HCADemuxContext, x)
132 static const AVOption hca_options[] = {
133 { "hca_lowkey",
134 "Low key used for handling CRI HCA files", OFFSET(keyl),
135 AV_OPT_TYPE_INT64, {.i64=0}, .min = 0, .max = UINT32_MAX, .flags = AV_OPT_FLAG_DECODING_PARAM, },
136 { "hca_highkey",
137 "High key used for handling CRI HCA files", OFFSET(keyh),
138 AV_OPT_TYPE_INT64, {.i64=0}, .min = 0, .max = UINT32_MAX, .flags = AV_OPT_FLAG_DECODING_PARAM, },
139 { "hca_subkey",
140 "Subkey used for handling CRI HCA files", OFFSET(subkey),
141 AV_OPT_TYPE_INT, {.i64=0}, .min = 0, .max = UINT16_MAX, .flags = AV_OPT_FLAG_DECODING_PARAM },
142 { NULL },
143 };
144
145 static const AVClass hca_class = {
146 .class_name = "hca",
147 .item_name = av_default_item_name,
148 .option = hca_options,
149 .version = LIBAVUTIL_VERSION_INT,
150 };
151
152 const FFInputFormat ff_hca_demuxer = {
153 .p.name = "hca",
154 .p.long_name = NULL_IF_CONFIG_SMALL("CRI HCA"),
155 .p.priv_class = &hca_class,
156 .p.extensions = "hca",
157 .p.flags = AVFMT_GENERIC_INDEX,
158 .priv_data_size = sizeof(HCADemuxContext),
159 .read_probe = hca_probe,
160 .read_header = hca_read_header,
161 .read_packet = hca_read_packet,
162 };
163